UA97027C2 - Piercing and rolling plug, method of regenerating piercing and rolling plug and regeneration facility for piercing and rolling plug - Google Patents

Abstract

Since a coating film composed of an oxide such as FeOor FeO and Fe (metal) is formed on the surface of a base material by electric arc spraying of an iron wire principally comprising Fe, a piercing plug can attain excellent heat shielding properties and seizure prevention properties due to this coating film, and the plug can have a long life. When the plug is regenerated, a coating the film can be formed again by sequentially performing shot blasting and arc spraying on a just-pierced plug, and thus the plug can be regenerated in a short time at a low cost.

Description

- a device for electric arc spraying, intended for stitching and rolling, successively replaced to obtain a mandrel, processed in a restored mandrel, which must be equipped with a shot blasting device, restoration of flax on the rod, and sent to the piercing mandrel with the help of electric arc spraying torture chamber, performed repeatedly. with the use of iron wire to create on 11. The technological line according to item 10, containing the device of its surface of the film, consisting of oxides and Ee, and spraying of lubricant, intended for applying the supply of mandrel restored in this way in lubricant on the surface of the restored mandrels for the mandrel replacement order, the path where the rod is transported with the mentioned devices installed in the specified restored mandrel, which is installed on it, in the above order, and in the devices installed in such a device for supplying and receiving the rod to requests each of the mandrels used in the rolling mill.

This invention relates to broaching and hot-rolling processing, subjecting the mandrel to heat treatment (further abbreviated also called "mandrel" at a high temperature, which is approximately from and the rolling stage in the manufacture of hours up to several tens of hours. seamless steel pipes, method of restoration In recent years, there has been a tendency to mark this mandrel and the technological line for restoration, increasing the demand for seamless steel pipes of this mandrel. and, in particular, the growing need for seamless

The method of manufacturing pipes according to the method of Manes steel pipes used in Jorman is a process of production under seamless conditions. For use in rigid steel pipes, which are widely used in sleepers, seamless steel pipes manufactured by hot treatment are suitable. In the course of the production process from such varieties of high-alloyed steel as stainless steel by the Manesmann method, a round workpiece, nibbling steel, alloyed steel based on Migrit is pre-heated to a certain temperature, or high-chromium steel with St 990 content or put in a piercing and the rolling stage (stitching above. stage) and stitch the central part of the round When the mandrel, covered with an oxide film, of the workpiece passing along the axis, which allows it is used for stitching in the production of rusting a hollow workpiece called "hollow of seamless roughs of high-alloy steel , a sleeve is necessary." to sew a workpiece that has a high resistance to defo-

A hollow sleeve, or in the form of s, rmation, so the oxide film on the mandrel is prone to increase in diameter and decrease in thickening and/or peeling. As soon as the oxide layer of the wall, if necessary, due to its pro-film on the mandrel is worn or peeled off, starting through the rolling state of the same cons- the effect of protection against heating decreases, and the temperature, as well as the above-mentioned piercing rolling rature of the base metal the mandrel grows, ethane is fed into the next rolling mill, which can damage the mandrel due to elongation, for example, the rolling mill is connected with heating wear (loss of metal). on the mandrel for the purpose of lengthening and rolling. After the mandrel covered with an oxide film is drawn, the resulting pipe is used for piercing and rolling in the rolling through the reduction stage, the correct stage, cesses for the production of seamless high-alloy pipes, the calibration stage and the like for alignment, noi steel, the oxide film in the general case of shape adjustment and calibration, which leads to wear off during several rolling passes and, until obtaining a seamless metal pipe as the last - thus, its service life is very short. of the exact product, If stitching and rolling continue with

In the course of piercing and rolling, using a mandrel with a damaged oxide of the piercing and rolling state as a piercing in-film, due to direct contact between the base tool, a ball-shaped mandrel is used. with the metal of the mandrel and the surface of the workpiece can

This mandrel is installed at the front end of the tube, which is an emergency situation, and, in the core or rod and used for sewing, at the same time, cracks will form on the inner surface of the hollow workpiece, heated to a high temperature, the sleeve, and it leads to what is approximately 12007, as a result of which the quality of the finished product deteriorates. it is exposed to high temperatures and high contact pressure. Thus, in the production of seamless pipes. As a result, an oxide film (scale) appears on the surface of mandrels made of high-alloy steel, which must be replaced often, which protects the mandrel, and as a result, the effectiveness of the main metal of the mandrel decreases. The oxide film protects the work of the piercing and rolling mill. In particular, in the mandrel from the heat coming from the workpiece, and this time, when the goal is efficient production at the same time, serves to prevent the capture of seamless steel pipes, and certain successes have been achieved in the mandrel with the workpiece. ensuring continuous operation of the equipment,

An oxide film on the surface of the mandrel, which is generally used for the process of manufacturing pipes, is formed when the mandrel, manufactured by the Manesman method, reduces the efficiency of the tool steel, intended for the operation of the piercing and rolling mill, affects the efficiency of the entire production process in no way service life only due to the mentioned internal steel pipes in general. composition of the base metal.

For restoration and reuse. In addition, all mandrels proposed in the instructions, the mandrel, which has already been used for quilting Documents 1-4 above, when they are repeated and removed from the rod, must be re-used for quilting and rolling requires - to cover the oxide film, however, to carry out a long period of heat treatment is required for this heat treatment, the renewal of the oxide film is required. Therefore, it took a long time and a number of stages until now. Accordingly, research was conducted with the aim of increasing the life of the mandrel. For example, in the published application for the Japanese rolling stock. patent No. 10-180315 (hereinafter referred to as "Document 5")

Taking this situation into account, until now a mandrel has been proposed, the bending strength of which, when various studies were conducted for the purpose of long-term high temperatures, was increased by increasing the service life of the mandrel and, thus, replacing the oxide film (scaling) on its surface - reducing, as much as possible, the number of mandrels, henna with ceramic material, such as 5IiS, Aii262Oz, which must be stored in a prepared form. 21O" or 5iz3Ma. In the published Japanese pa-

For example, in the published Japanese awning patent Mo 59-13924 (hereinafter referred to as "Document 6"), pro-

Mo. 04-8498 (hereinafter referred to as "Document 1") a mandrel is proposed, the film on the surface of which is formed to increase the stability of the base metal by means of plasma sputtering of the mandrel to high temperatures at the expense of Ee oxide powder. sion of the Cg content and the addition of Mo, MU and/or the like However, the ceramic zone of the proposed mandrel, as well as the proposed oxide mandrel in Document 5, is prone to damage due to the film having excellent adhesion, which is created by impact when carrying out stitching, and therefore on the surface of the mandrel and fixed on this surface. when replacing and operating the mandrel with it is necessary

The mandrel proposed in Document i should be handled very carefully. In addition, the mandrel has the disadvantage that when the length of the seam increases, which includes ceramics, it is very expensive and its weighting of the blanks becomes insufficient in terms of resistance to restoration. In addition, the mandrel proposed for high temperatures of the base metal of the mandrel, bath in Document 6, requires the presence of a device and the adhesion of an oxide film to it, and, therefore, not for plasma sputtering of powders, which has an acceptable long ter can be provided - normal dimensions, when preparing and restoring the mandrel and, min of service. therefore, requires significant costs.

In the published application for Japanese patent Mo. As mentioned above, 04-74848 (hereinafter referred to as "Document 2") and the published research for the purpose of extending the service life of Japanese patent application Me 04-270003 (hereinafter mandrels to prevent possible reduction called "Document 3") mandrels are offered for the efficiency of the stitching and rolling processes. in which a base metal having a chemical composition is used. However, it cannot be expected that only the selection of a chemical composition suitable for improving the resistance of the base metal will lead to the continuation of the formation at high temperatures and crack resistance to a sufficient extent of the service life of the mandrel, when it is bone , and on the surface of which an oxide film is created, it is used for stitching and rolling at

However, the mandrels proposed in these Documents 2 for the production of seamless logs from high alloy and 3. have the disadvantage that the oxide film in the steel zone. the top of the mandrel, where the contact pressure is the highest. In addition, in the case of repeated use and the temperature during stitching increases, the mandrel during stitching and rolling is necessary three- melts and loses its ability to protect against the rough period of heat treatment to restore heating and resistance to abrasion, as a result of which the vertices of the oxide film. Thus, in the course of research, on mandrels that are easily damaged and/or deformed, attempts were made to form a metarchne film using a ceramic matel due to melting loss. rial instead of an oxide film of scale, or create

In the published Japanese patent Mo 64-th film by means of plasma spraying 7147 (hereinafter referred to as "Document 4"), iron oxide powders are proposed. However, in each case, the mandrel, for which the base metal is used, the measures taken could not effectively extend the service life of the mandrel, which contains St and C as additives, and on the surface of which. an oxide film is created. However, the mandrel, which is proposed in Document 4, also has the disadvantage that, taking into account the problems discussed above, it is easy to damage and/or deform. due to the service life associated with the melt and which, in the case of ITS re-execution, is caused by the loss of metal during flashing. germination can be restored at low costs

In any case, from the mandrels, slops and in a short period of time, as well as those proposed in the above-mentioned Documents 1-4, the chemical method of restoration of this piercing mandrel and the composition of the base metal in which they are regulated, in the resulting technological a line for the restoration of the piercing dku, their application for piercing and rolling of the mandrel, on which such a mandrel can be restored - in the manufacture of seamless pipes from high alloy (in online mode) using a group of cast steel, one cannot expect an increased acceptable order for the return of the mandrel in good condition,

which is part of this line. feeding and receiving the rod after replacing the mandrel,

To solve the problem, the authors of da- used during flashing | rolling, the invention carried out in-depth research, nama- restored mandrel; shot blasting device to prolong the service life of the mandrel during its processing, intended for receiving the mandrel, using it for piercing and rolling when used in the course of piercing and rolling, butting of seamless steel pipes and realizing from the device the replacement of the mandrel and the carrying out of the shot blasting restoration of the mandrel at low costs And in kotromin processing of the surface of the mandrel, a short period of time is used for unobstructed repeated stitching and rolling; a device for electrical use and, as a result, the authors created a triple-arc spray designed for this invention. obtaining the mandrel processed in the device of fractional

In fact, this invention offers jet processing, restoration of the mandrel for sewing rolling mandrel, a method of restoration using electric arc spraying from a used and rolling mandrel and a technological line for melting iron wire in order to create on it for the restoration of the piercing and rolling mandrel, the surface of the film consisting of oxides and Re, and which are defined below. submission of the mandrel restored in this way in

Stitching and rolling mandrel, designed for mandrel replacement, and to create its technical reuse in the stitching and pro-technological line, the mentioned devices are installed in the same condition, which is used in the production of the above order, and on such a mandrel line, seamless steel pipes , differs in that the one used during flashing And! rolling, the latter has a film consisting of oxides and Re, which is long replaced by a restored mandrel, mandrels are installed on the surface of the base metal, placed on the rod and then re-directed into the blast-blasted, auxiliary and rolling mill . electric arc spraying using the mentioned technological line for recovery of iron wire. preferably additionally contains a device

In the mentioned mandrel, the share of zones engaged in spraying lubricant, intended for application of oxides in the above-mentioned film, preferably lubricant on the surface of the restored mandrel, in the case is 55-8095. It is also preferable that the path from the device for supplying and receiving the rod to the part of the zones dealing with oxides in the film, the continuous rolling state, and the supply on the side of the surface layer was higher than on the side of the rod is performed with the base metal installed on it; in this case, the share of zones with a new mandrel. are engaged in the film with oxides, in the preferred case. and Re and thus the layer. In the preferred case, the mandrel is made in has excellent properties of protection against heating and the shape of a ball, and the thickness of the film in the area of the top in the prevention of hardening and, at the same time, the mass is in the preferred case a greater thickness of the film in the intended service life and. in addition, since the film of the ndric part. In addition, it is preferable that a lubricant is applied to the surface of the film created with the help of an electric arc. Iron, the mandrel can be prepared and restored when the wire, in most cases, contains MU. low costs and in a short period of time.

The method of restoration of the mentioned piercing mandrel According to the method of restoration of the piercing and rolling for its reuse, the rolling mandrel corresponding to this invention is distinguished by the fact that the surface of the mandrel is subjected to shot-blasting, the mandrel used in piercing and rolling, mine processing to remove the film from the mandrel, are alternately subjected to shot blasting and used in piercing and rolling, after electric arc spraying, and on the surface of the mandrel with the help of electric arc spraying, a film consisting of using iron wire is created, oxides and Re are created on the surface of the mandrel, and, thus, the mandrel it is possible, on the other hand, that consists of oxides and Ge. grow at low costs and in a short period of time

In the mentioned method of restoring the removal of su. film using shot blasting and In addition, the technological line for restoring the creation of the film using an electric arc piercing and rolling mandrel, corresponding to this sputtering is preferably excavated by the invention, can be implemented in practice only in the area of the top of the mandrel, excavated in the form of an automated line for recovery and bullets. replacement of the mandrel in a short period of time with the aim

The technological line for the recovery of the mandrel from the reuse of a group of mandrels, the purpose of which is its reuse in the piercing and it is possible to restore the mandrels in the on-rolled state, which is used in the production line without carrying out any unfavorable bending of seamless steel pipes, is different impact on the efficiency of the entire production process, which it contains; a device for supplying and receiving seamless steel pipes in general. rod, intended for feeding the rod from the device. In Fig. 1 shows the results of measurements made by the mandrel mentioned on it and obtained during the X-ray analysis of the rod after its use during stitching of films on the surface of the mandrel, for different distances and rolling; mandrel replacement device intended for electric arc spraying. for receiving the rod after use in the course of Fig. 2 shows microstructures in cross-cutting and rolling from the feeding device and the cross-section for films on the surface of the mandrel for the rod, as well as feeding the rod to the device at different distances during electric arc spraying.

In Fig. From the given interrelationship between part- When forming such a structure, it becomes possible to create a film on the surface of the oxides in the film on the mandrel and the strength of the bond, on the surface of the new preparation of the film. lazy mandrel or mandrel that is restored, for

In Fig. 4 shows the relationship between the frequency of electric arc sputtering in the film on the mandrel and the size of the film. in cases of creation of an oxide film in the form

In Fig. 5 shows the interrelationship between fractions and slags with the help of heat treatment. In addition to the oxides in the film on the mandrel and the number of sequences before that, the device of the electric arc tension of stitching and rolling operations (the number of shedding can have a much simpler design). tion in comparison with the known plasma device

In Fig. 6 shows the microstructure in cross-spraying. In addition, the iron wire, which is a cross-section for the film on the surface of the mandrel, is a material for electric arc spraying, rusted by electric arc spraying, and can be obtained at lower costs by gradually increasing the spraying distance. in comparison with powders, which is the usual mother-

In Fig. 7 shows the relationship between the plasma spraying mixture. volume of MU and efficiency of piercing for mandrels, The film, which consists of a combination of oxides and a film on which is created with the help of an electrode, which is created on the surface of the piercing mandrel by using iron wire according to this invention, has excellent properties, which contains MU. protection against heating and prevention of

In Fig. 8 shows the relationship between the effect. Next, the distinctive features of the stitching and the degree of deformation of the top of the mandrel corresponding to this invention are described. mandrels for mandrels on which the film is created according to Fig. 1 shows the results of measurements, using electric arc spraying, obtained during X-ray analysis by melting iron wire containing MU. films on the surface of the mandrel, for different distances

In Fig. 9 schematically shows the transverse during electric arc spraying. In Fig. 2 shows the cross-section of the top and the zone in the immediate vicinity of the microstructure in the cross-section for films from it for the mandrel with a film created over the surface of the mandrel for different distances during electro-arc sputtering, after 10 pro-arc sputtering. The distance of the sputtering and stitching courses. represents the distance from the spray nozzle

In Fig. 10 shows the relationship between the number of electric arc spraying devices to the surface of the scrap of successive stitching passes and the thickness of the base metal of the mandrel, which is the target, which is bent by the film that remains on the cylindrical part. In Fig. 1 and Fig. 2 shows the results of the mandrel. measurements and microstructure in the transverse trans-

In Fig. 11 schematically shows the general configuration for films formed using electro-figuration of the technological line for recovery from arc spraying with the appropriate distances of spraying for the purpose of re-using the piercing frame, which are 200 mm, 400 mm, 600 mm, 800 ki, corresponding to this invention. mm, 1000 mm, 1200 mm and 1400 mm.

Fig. 12 - a side view of the frame replacement device. In Fig. 1 it can be seen that in the films created on ki in general. the surface of the base metal of the mandrel with the help of

Fig. 13(a) - Fig. 13(Й) are cross-sections of electric arc spraying, the content of oxides (Hes) and cross-sections of essential elements, given for illustration. This is due to the fact that the mandrels in the mandrel replacement device. as the spraying distance increases,

Fig. 14 - a side view of the shot blast oxidation device of the molten sprayed material processing in general. rial (Ge) released from the atomizing nozzle.

Fig. 15 is a side view of an electric arc device. In cross-sections of films shown on sputtering generally. Fig. 2, each zone, the one that has a light gray color

In Fig. 16 schematically shown in general is Ge, each zone having a dark gray figure of the process line for color recovery is an oxide, and each zone having a mandrel in which a sputtering device is installed black is a void, as and lubricants are marked. in these forms. As can be observed on these same

Fig. 17 - a side view of the spraying device in the views when the spraying distance is, smeared in general. example 200 mm, oxides occupy 20-3095 total

In Fig. 18 schematically shows the overall horse volume of the film, while 70-8095 is a general representation of another technological line for restoring the volume that remained occupied by Re. When the distance of the mandrel, in which the spraying device is installed, is 1000 mm, the oxides occupy the lubricants. approximately 8095 film volume, while 2095

The flashing mandrel corresponding to this wine - the remaining volume is approximately occupied Re. Mikhod differs in that in the process of creating the structures shown in Fig. 2, also indicate that the film on the surface of the base metal of the mandrel film increases as the sputtering distance increases, the fraction consisting of oxides, for example Reso) and oxides increases, while the amount of Be

EeO, as well as Re (metal), form on this reduc- decreases. henna by means of electric arc spraying with such a chip, the proportion of zones occupied in the oxide film by the use of iron wire, the main composites (hereinafter referred to as "relative oxide content") nent of which is Ee. varies depending on the spraying distance.

Therefore, by adjusting the sputtering distance equal to the corresponding sputtering distance, the relative content of oxides in the film can be controlled in such a way that the relative content of oxides in the film can stabilize. new 25, 45, 60, 75 or 85905. In addition, for

In Fig. From the shown relationship between the ratio on the surface of the base metal of the mandrel, the content of oxides in the film on the mandrel and the strength of the film was created with the help of plasma adhesion of the film. Adhesion strength of the RezO5 powder deposition film. This mandrel is made of plasma to the degree of unbreakability and the strength of the connection with the surface spraying corresponds to the mandrel offered by the main metal of the mandrel and shown in the above-mentioned Document 6, and the film on the 10090 nick of resistance to peeling during stitching and consists of from oxides. rolling Therefore, when the adhesive strength is high, using the obtained in the form of dough, the film is almost impossible to peel off, and when adhesive mandrel samples were tested, in which the adhesive strength is low, the film is easily peeled off - the parts were successively stitched and rolled, . As shown in Fig. 3. resistance of the film to be removed from the layer being processed. Round workpieces were used as the parts being processed, each of which has an outer diameter of 70 mm and a length of 1000 mm and a length of 1000 mm and a length of 1000 mm. from ZO5Z304 steel (austenitic stainless steel defined by standard 915) as high-

In Fig. 4 shows the relationship between relative alloy steel. These parts, which are treated with the heated content of oxides in the film on the mandrel and are increased to 12007С and then subjected to tests on the abrasion of the film. The amount of abrasion of the film in quilting using the above-mentioned method reflects the decrease in weight after 1600 repetitions of the shells, which are test samples to obtain surface cleaning from the film and serves as an indicator of the hollow sleeve, each of which had an external dia- resistance to abrasion during quilting and rolling . So, the meter is 74 mm, the wall thickness is 8.6 mm, and the length is 2200. When the amount of abrasion is small, the film has MM. | And it does not rub off, and when the amount of rubbing is significant in this test for each mandrel, the film is easy to rub off. As shown in Fig. with the 4th sample, its appearance was checked after 4, the resistance of the film to abrasion decreases with each pass of stitching and rolling, and the relative content of oxides in the film increases, and when the skin was evaluated and the service life was calculated, the relative content of oxides exceeds 8095. this resistance mandrel, which is measured by the number of passes, is decreasing rapidly. the moment when the damage was detected or

A decrease in resistance to delamination and resistance to deformation of the top of the mandrel due to the loss of metal associated with the early film with an increase in relative content by melting, namely the maximum oxides in the film, as shown in Fig. C and Fig. 4, the number of passes in which it can be successfully explained by the decrease in the amount of Re (metal), which (there were consecutive passes of piercing the rolled sheet is located between adjacent individual zones). oxides and, thus, serves to bind them. together. Unpainted circles in Fig. 5 shows

While the peeling resistance and abrasion resistance - the number of consecutive stitching passes was ensured at a higher level with such that it is equal to 0 (zero) In the case of the mandrel With a decrease in the relative content of oxides in the film, as the relative content of OXIDES IN THE FILM , 2575, which can be seen from Fig. C and Fig. 4, an excessively low number of axes of stitching passes and the relative oxide content means that Re zaul Take; WHAT STILL in the mandrel with or takes the main part of the film, as a result of which 8595, and the number of consecutive stitching passes, thermal conductivity becomes relatively high, and in the case of the mandrel with, the relation to heat protection drops. That's how- ul Take; WHILE putting 609 or nom, the top of the mandrel becomes easily prone to 759, ' damage and deformation due to the loss of metal associated with the mandrel used for catching the broaching. , and bathing and rolling. comparison with plasma spraying, the number of subsequent

In Fig. 5, the relationship between the relative stitching passes was such that: the content of the oxides in the film on the mandrel and the number of threads 1, as indicated by the colored circle in Fig. 9. consecutive stitching and rolling operations (number of passes). When performing a demonstration of oxides in the film, 2575, which was 4576, in the zone : : top of the mandrel, the occurrence of post-testing was observed, during which the results were obtained, of corrosion or deformations due to the mandrel , which are test samples, were prepared using entrapment by metal loss. and cast steel, suitable for hot processing. From the results shown in Fig. 5, obviously, which is recommended by Japanese industrial mandrels that have a film created with the help of standards (5, darap Ipdizingia! apadagav), and the tom siv vydnozhdya on the BB- on the surface of the base metal of each of the mandrels 8095 have a service life that can be doubled using electric arc spraying. by melting the iron wire, a thick film was created, exceeding the service life of the mandrel, with a plasma thickness of approximately 400 microns. by spraying and, in addition, mandrels that have

During electric arc sputtering, a film with a relative content of oxides in it, the position of the spray nozzle was adjusted to the level of 60-7595, have a service life of at least three times the service life of this surface, and completed the electric arc mandrel with plasma sputtering. spraying in the stage when the spraying distance is

Thus, when the relative content of oxides in the shaft is large. At the same time, on the surface of the main film is adjusted to the level of 558090, the mandrel, from the metal of the mandrel, a film appeared, the relative content of which is intended for the use of oxides in which gradually increased in the direction of driving in piercing and rolling during the production of the surface layer. In this film, the relative content of seamless tubes of high-alloy steel, demon- oxides was low in the zone next to the main meta- has a longer service life compared to scrap, and the relative content of oxides was high in the zone known plasma-sprayed mandrel. In addition to the surface layer. moreover, from the point of view of the further extension of the term, in Fig. 6 shows the microstructure in the cross-section of the mandrel, preferably relative to the cross section for the film on the surface of the mandrel. gradually increasing the spraying distance. In the

Further, as regards the influence of the relative content of the cross-section of the film shown on this oxides in the film, revealed on the basis of the results, the form, as in the case mentioned above, Fig. 2, each shown in Fig. 5, consider an additional aspect of the zone, the one that has a light gray color represents efficiency. In the case of the mandrels used, each zone having a dark gray color represents the results shown in Fig. 5, the film was a void. As shown in Fig. 6, the film created during electric arc sputtering is created on the surface of the base metal of the mandrel, under the condition that the sputtering distance maintains a low relative content of oxides in the zone next to the constant, in order to obtain a film that is equal to the base metal, and the zone of the surface layer, the numerical relative content of oxides throughout the volume shows an increased relative content of oxides. from the zone next to the base metal to the surface zone. In this regard, tests were carried out, analogical research was carried out, this time using a similar to the firmware test discussed above. The evaluation of mandrels with a film created using electric was carried out on the basis of the service life of the mandrel, three-arc spraying with a gradual increase expressed by the above-mentioned number of successive spraying distances in such a way that the relative number of stitching and rolling operations (by the number of passes) the oxide content in the film could gradually increase ). For comparison, it was similar in the direction of the surface layer. la tested mandrel with a film having equal

Therefore, when creating an electric arc film, the relative content of oxides was measured throughout the entire volume, sputtering was started in a state when the spraying nozzle created on the surface of the base metal of the mandrel was the closest to the eyelid with the help of electric arc spraying in the corner of the base metal of the mandrel, namely , in the condition, under the conditions of maintaining the constant spraying distance. when the spray distance was short, after The test results are shown in Table 1 below, the spray nozzle was gradually removed

Tables 1 sewing

As shown in the table, the mandrel from Test Mo 1 As a result, in the film of the mandrel from Test Mo 2, the relative oxide content was approximately 2595 in the arc spraying zone with a constant distance from the base metal and approximately 8090 in the melting zone, which is 1000 mm, and the relative content of the surface layer; in the film of the mandrel from the Mo Test, the oxides in the film were uniform and amounted to approx. zone next to the base metal and approximately 8095 in

On the other hand, the mandrel from Test Mo 2 was in the zone of the surface layer; and in the film of the mandrel from Test unbaked with a film obtained with the help of ele-Mo 4, the relative content of oxides was approximately ktro-arc sputtering under the conditions of a gradual change of 5096 in the zone next to the base metal and approximately the sputtering distance from 200 mm to 1000 mm, mandrel 8095 in the zone surface layer. The thickness of the film in all mandrels from Tests MoZ was provided by electric arc spraying in 1-4 was approximately 400 μm. under the conditions of a gradual change in the sputtering distance from As shown in Table 1, for the mandrel from Test 400 mm to 1000 mm, and the mandrel from Test Mo 4 was Mo 1 with a uniform relative content of oxides in provided with a film obtained with the help of a film, the number of successive passes of electric arc spraying in conditions of gradual was 2. On the other hand, for mandrels from Tests of changes in spraying distance from 500 mm to 1000 mm. MoMo 2-4, and for which the relative content of oxides in the film on the side of the surface layer was higher than on the side that is difficult to exfoliate. of the base metal, the number of consecutive passes. Thus, it is preferable that the relative content of flashing is equal to 4 in the case of oxides in the film on the mandrel corresponding to the given mandrel from Test Mo 2, and the number of consecutive passes of the invention, on the side of the surface layer was higher, flashing was equal to Z in the case of than on the side of the base metal and, in particular, larger than the mandrel from Test Mo 3, and in each case the number is preferably so that the relative content of oxides in the zone of successive passes of flashing was greater, next to the base metal was not less than in the mandrel from Test Mo 1. In the case of the mandrel from 4095, and the relative content of oxides in the zone of the surface

Test Mo 4, the number of consecutive passes of the quilting layer was 55-8095. was equal to 2 and, thus, was Now consider the aspect of the film thickness, equivalent to the number of successive passes of the mandrel created on the surface of the base metal. tations for the mandrel from Test Mo 1. While each of the mandrels tested above

From the results given in Table 1, spherical contours with constant thickness were evident, but the following: mandrels that have a film in which the film is reproduced along the entire length from the cylindrical side of the surface layer of the part of the mandrel to its top, higher than on the side of the base metal, it is possible to consider the change in film thickness in the cylindrical part and in the top zone during the service life with mandrels having a film, in order to determine the influence of the film thickness in which the relative content of oxides is uniform in the cylindrical part and in the top zone. Depending on its volume, or the service life of the first remelted as test samples of the mandrel with such a film exceeds the service life of the latter; in addition, the mandrels with were tested in the same way as in the considered film, the relative content of oxides in which is higher than the flashing test. The grade was 4090 or less in the area adjacent to the base metal, based on the life of the mandrel expressed as having an increased life. This is due to the above-mentioned number of successive operations against the fact that the film zone next to the main kneading and rolling (number of passes), as well as in the precipitate, has a low relative content of oxides, and therefore the evaluation, the results of which are shown in the Table 1. a lot of Re (metal), so the adhesion is strengthened. The obtained test results are shown below in Tab- films with the base metal of the mandrel, due to the face 2. which weakens the resulting stresses, and the film

Table 2 77712 |... 4б0б0мкм 177777 bb0омкм// | ///////// bpassages./:/.:.:|(/38;42 17714 | bb0bmkm. 177777 8bb0mkm// | ///// bpassages./:/-.:/(/3 /6BrSh

As shown in the above table, the mandrel was created using an electric arc from Test Mo 11 and was equipped with a film that has sputtering under the conditions of changing the sputtering distance from a constant thickness of approximately 400 200 mm to 1000 mm and, thus, relative micron content from the cylindrical part to the top. The frame of oxides on the side of the surface layer was higher than the one from the Mo 12 test was equipped with a film, the thickness on the side of the base metal. which was approximately 400 μm in the cylindrical As shown in Table 2. the number of successive parts and approximately 600 μm in the top zone, the number of stitching passes was 4 for the mandrel from the test Mo 13 was equipped with a film, then- Test Mo 11, which mass throughout with a small length and a thickness of approximately 400 μm in a cylinder - constant film thickness. For the mandrels from Tests of the dric part and approximately 800 μm in the ver- MoMo 12, 13, 14 and 16 zone, in which the film was thicker in the bus zone, and the mandrel from the Mo 14 test was equipped with a vertex than in the cylindrical part, the number of subsequent film, the thickness of which was approximately 600 long stitching passes was, respectively, microns in the cylindrical part and approximately 800 microns in the but, 5.6, 6, and 10, and the number of consecutive passes of the prozone of the top. The mandrel from the Mo 15 test was equip- increased with an increase in the thickness of the film, which has a constant thickness, which is flat-film in the area of the top of the mandrel. For the mandrel from Tesvil, approximately 800 µm along its entire length from the site of Mo 15, which has a significant and constant along the entire length of the cylindrical part to the top. Film thickness test mandrel, film in cylindrical part

Mo 16 was equipped with a film having a thickness of mandrel peeled off after one pass and, approximately 400 μm in the cylindrical part, as in this way, the number of successive passes of broaching mandrels from Tests MoMo 11-13, and the thickness in the blowing zone was only 1. thickness exceeding the thickness in any of the other From the results given in Table 2, apparently mandrels, namely, which is approximately 1200 that with increasing film thickness in the top zone

MKM. the service life of the mandrel increases. In addition,

In any of the mandrels from Tests MoMo 11-16. if the thickness of the film in the cylindrical part of the

vky is excessively high, when carrying out stitching in the stitching state, due to the effect of the friction resistance between the film peels off, as a result, the mandrel and the workpiece are in contact with each other, which shortens the service life of the mandrel. Such and such. The ratio of speeds (- (actually, preferably so that the film thickness in the zone of the wave feed speed) the theoretical speed of the piston was higher than in the cylindrical part, and giving) (100 (951) in the general case is called so that the film thickness in the cylindrical part of the mandrel, the "stitching efficiency" was less than 800 μm, more preferably so that when the stitching efficiency is high, the pin was in the range from 400 μm to 600, not only the efficiency of the stitching rolling mill increases, but also shrinking

At the same time, during piercing, the contact time between the mandrel and the workpiece, therefore, can be expected to increase the service life of the mandrel when rolling the workpiece on the piercing rolling mill. condition, the workpiece heated to a high temperature. Thus, during stitching and rolling, it falls very much in its axial direction with a constant speed to increase the stitching efficiency. bone while simultaneously bringing this workpiece into Therefore, the increase of the effect of rotation with the help of a set of rotating corrugations of the stitching with the help of the considered wicks (rolls of the stitching state), located on the mandrels, is further considered. First, by creating a film on the circumference of the workpiece. Before the workpiece, which is set in motion near the surface of the mandrel with the help of an electric arc, a located co-sawing is established. the top of the mandrel, after which the lubricants, usually used in the conditions of stitching and rolling, begin. The workpiece is fed to high temperatures, and they were tested until the mandrel completely passes through it, after which the process of stitching and rolling ends in the same way as when carrying out the above-mentioned process. firmware test. To compare the same test-

At the same time, the speed at which the workpiece was also fed to the mandrels that do not have an axis in its axial direction (hereinafter referred to as "high-speed lubricant layer. The assessment was carried out on the basis of the consistency of the feed") is determined by the number of revolutions of the rolls of average stitching efficiency , calculated firmware state. However, the real feed speed for the data on the efficiency of stitching at the feed during the stitching slows down in equal passes until the end of the term of the babysitter with the theoretical speed of the feed, which calculates the service of the mandrel. The test results obtained in this way based on the given number of roll revolutions are listed below in Table 3.

Table With flashing

As shown in the table above, the mandrels from MoMo Tests 21-23 did not have a layer of lubricant on 21, 22 and 23, which did not have a layer of lubricant on the surface of the film surface, so the films were open On the other hand, the film demonstrated the average efficiency of the mandrel from Tests MoMo 24-26 to have a layer of lubricant on the stitching surface, which was 59.095, 59.9905 and 73.8905. Used accordingly. In contrast, the mandrels from the Tests were lubricated with orthoboric acid (HzVOz) for MoMo 24, 25 and 26, which had a layer of lubricant on the surface of the mandrels from the Test Mo 24, liquid glass (conceptualized films, demonstrated average effectiveness aqueous solution of sodium silicate (Mag5iOz) for broaching, which was 80.395, 82.190, and 85.8905, from the Mo 25 test, or boron nitride (BM) for broaching, respectively; thus, the average efficiency of the Mo 26 test was higher by about 1095- 2095 in

Films on mandrels from Tests MoMe21, 22, 24 and 25 compared with mandrels from Tests MoMo 21-23, which were not created during electric arcing, had a layer of lubricant. sputtering while maintaining a constant distance on the From the results shown in Table 3, apparently, the sputtering and, thus, the relative content of oxides in which the application of lubricant on the surface of the film of the welder was unchanged throughout the volume. Films for children to increase the efficiency of stitching. mandrels from MoMo Tests 23 and 26 were created at Thus, it is preferable that the mandrel, the proposal of electric arc spraying with the present invention, had a layer of lubricant on the changing of the spraying distance from 200 mm to 1000 film surface. In addition to orthoboric acid, liquid mm. and the relative content of oxides in the film was higher on glass and boron nitride can also be used on the side of the surface layer than on the side of the main one as a graphite lubricant and the like. metal Next, we will consider the effectiveness of using an iron wire during electric arc spraying of the same test as the above-mentioned flashing test. to create a film on the surface of the main metal The assessment was carried out on the basis of the above-mentioned mandrel. Thus, films were created on the surface of the base metal with a high efficiency of piercing, similarly to the mandrel, using a cutting method, the results of which are shown above in the Table of types of iron wire used for 3. The results obtained in this way are shown in the electric arc spraying, and prepared in the following in Table 4. the manner in which the mandrel test specimens were subjected to

Table 4 no

As shown in the table above, the coating using iron wire, which replaced the mandrel from Test Mo 31, was created with the help of MU. Next, the acceptable range of iron wire, free from any chemical elements M/ in the iron wire, used in electric elements - metals, except for Re (if there were any, then arc spraying. In this case, films , only at those content levels that cannot be avoided). obtained with the help of electric arc spraying

It should be noted that this iron wire, formed on the surface of the base metal on the basis of Re, was also used in electrode mandrels using samples of iron wire, in which sputtering on all mandrels considered above changed the content of MU (in 95 by mass), and prepared in

Ky. such a method as test samples of the mandrel were pro-

The film on the mandrel from Test Mo 32 was created in the same way as in the considered electric arc sputtering test above. by rolling iron wire with He-MuU containing 490 In Fig. 7 shows the ratio between the content by mass of MU. The film on the mandrel from the Mo 33 Test was the M th piercing efficiency for the mandrels, the film was created using electric arc spraying, which was created using electric arc spraying using an iron wire with ГЕе-Ми-МуУ, which spraying using an iron wire, which additionally contains 395 by mass Mp. contains M/. As shown in the form, in moderation

Films on mandrels from Tests MeMe 31-33 were all increased M/ content in the iron wire, the use methods were created during electric arc spraying for electric arc sputtering, the efficiency increases with a change in the sputtering distance from 200 mm to the strength of the sputtering. This is due to 1000 mm and. thus, the relative content of oxides in the fact that when making an electric arc film on the side of the surface layer was higher than on sputtering using an iron wire on the side of the base metal. has a high content, the amount of SHO increases," which

As shown in Table 4, the average effi- will be formed in the film, and, accordingly, the reinforcing strength of stitching was 73.85 in the case of the effect of liquid lubrication when carrying out the mandrel from Test Mo 31, which had a film created during stitching. Thus, in order to increase the efficiency of electric arc sputtering from the use of flashing, it is useful to increase the content of MU in the melting of iron wire with He. In contrast to this, the iron wire used for the electro-mandrel from MeMe Tests 32 and 33, which had a film, was arc sprayed. created with the help of electric arc spraying. In Fig. 8 shows the relationship between the effect using an iron wire containing UM, the stitching efficiency and the degree of deformation. The average values of the efficiency of the mandrel tire for the mandrels on which the film is stitched, which are 81.495 and 79.695, respectively, with the help of electric arc spraying, are shown from the results, which were higher by about 1095 in the comparison of the iron wire, which contains As penance with the mandrel of Test Me31, prepared with indicated on this drawing, there is a tendency to use iron wire with Ge. increasing the deformation of the top of the mandrel to the extent

From the results shown in Table 4, it appears that the efficiency of stitching has increased. This is due to the fact that the use of iron wire, which contains MU, is due to the fact that although the mandrel with a coating, in the creation of a film using electric arc welding, which demonstrates a high efficiency of welding, sputtering leads to an increase in efficiency can be obtained using electric arc welding. This is due to the fact that in the sputtering using an iron wire, the film additionally has U/Oz as an oxide, which is an oxide with a high content of MU, as indicated by the results, a house with a low melting temperature, and this shown in Fig. 7, which we referred to will leave,

M/Oz melts during stitching, and in the quality of the mandrel, which demonstrates high efficiency, as a result of this, it provides the effect of liquid stitching, on the other hand, it decreases due to felting. Thus, it is preferable that the film for the loss of weight of the film itself, due to the melting of the mandrel proposed by this invention, the absorption of UMOz during stitching, which leads to tearing with the help of an electric arc voltage, a decrease in the properties of protection against heating in the film

bathing while in the cylindrical part of a significant

When the degree of deformation of the top of the foaming mandrel or peeling of the film is not observed. exceeds 2.5 mm. the frequency of occurrences of longing, which In addition, as shown in Fig. 10. it was found that, with an emergency situation during stitching, the thickness of the film in the cylindrical part of the mandrel increases in some cases. Thus, taking into account the coating applied with the help of electrons, the results shown in Fig. 8. mainly, arc spraying, remains unchanged for the stitching efficiency for the mandrel not even after 10 stitching passes. On the other hand, exceeded 9095, as a result of which the degree of de- in the case of scale-covered mandrels, the thickness of the formation of the top of the mandrel will not be able to exceed the film rapidly decreases not only in the area of the top 2.5 mm: to realize this, the upper limit of the LU content of the tire , but also the cylindrical part and, as shown in the iron wire used in the electro-zano in Fig. 10, the film thickness in cylindrical arc spraying, preferably set on the part of the mandrel decreased to approximately 100 equal to 10905 by weight. From a practical point of view, the Mo content is μm, and the service life of the mandrel has expired after Z, in the best case, should be in or 4 passes of flashing. in the range of 2-5905 by mass. Given the above, not always

Although, based on the above, it has now become mandatory to subject the cylindrical part of the mandrel to restorative treatment. electric arc spraying, it is desirable to damage the film in the cylindrical part while taking into account the economic aspect when implementing the processing is unlikely: there is a possibility of restoring such a mandrel that has a film, reusing the mandrel after it has been supported with the help of electric arc spraying , only its top was given restorative treatment, where real working conditions. Therefore, as test samples, the film is damaged. mandrels were prepared having a film, then, in order to check whether it is possible to re-sintered with the help of electric arc spraying, with the use of a mandrel after restorative processing with a thickness of approximately 800 μm in the zone of the top of only its top, the following test was performed. mandrel and approximately 400 µm in the cylindrical time- First, at the previous stage, under the same conditions, the tines, which were subjected to testing in the form of stitching and in the test considered above, as test samples under the same conditions as in the considered test above, three mandrels were prepared, the coating on which was applied to the stitching test; the number of successive passes carried out with the help of electric arc sawing from piercing was from 1 to 10. It was check- obtaining a film thickness of about 800 μm in but how the film is erased on each of the mandrels after the zone of the top of the mandrel and about 400 μm in its each pass. For comparison, there were prepared cylindrical parts, which were subjected to flashing, and mandrels that underwent heat treatment and static test; the number of consecutive passes of flashing on the surface of the mandrel of the oxide film was 5. After previously performed operations, the scale with a thickness of 300 µm or 500 µm was subjected to flashing, respectively, along the entire length from its top to the cylindrical no. , restorative processing in the conditions of A. B and C, given parts, which were subjected to the same study. below in Table 5, and then restored mandrels of

In Fig. 9 schematically shows a cross-section subjected to a piercing test while observing those cross-sections of the top and zone in the immediate vicinity of the same conditions as in the test considered above; evaluation of those from it for a mandrel with a film created according to was carried out on the basis of the service life of the mandrel, with the help of electric arc spraying, after 10 expressed by the number of consecutive stitching passes. In Fig. 10 stated the statement. relationship between the number of successive passes of the pro- For comparison, the same test and assessment of bushing and the thickness of the film that remains on whether applied to a mandrel with an oxide film in the cylindrical part of the mandrel. in the form of scale, which has a thickness of 600 microns, which

As shown in Fig. 9, in the case of the mandrel, after it was created with the help of heat treatment, the coating applied to the entire surface of the mandrel with the help of an electric arc, as shown below in Table spraying, it was found that the film in the zone of the spindle 5 in the line of Test 0 The results of testing them mandrel tires are lost due to abrasion and mandrels are shown below in Table 5. peeling after 10 passes of stitching, in

Table 5 flashing

Shot blasting for processing the entire top zone: thickness 800 μm.

And the surfaces -» Electric arc writing- | Cylindrical part: thickness of 6 passes over the entire surface is 400 μm

Shot blasting for processing of the top zone: thickness 800 μm. keyed -» Electric arc type- | Cylindrical part: in the state of 2 passes only in the top zone after stitching

Shot blasting Top zone: thickness processing only in the top zone -» | 800 microns. Cylindrical part: in (Fi, and with, 6 passes

Electric arc spraying of the body after stitching in the top zone

Heat treatment (creating |Top zone: thickness of 600 μm scale film) Cylindrical part: thickness of Z passages 600 μm

As shown in the above table, the mandrel of the shot blasting during the restorative treatment after restorative treatment A was the mandrel, and the number of successive passes of the broaching prepared as follows: the removal of all did not exceed 2. In the case of the mandrel O, covered film after its use in pre-scaling operations, the number of successive passes of quilting and rolling with the help of a drone was only 3. boblast treatment; and the re-creation of films. From the above results, it is obvious that ky on the entire surface with the help of an electric arc mandrel, the coating on which is applied by spraying. Mandrel after restorative treatment. In electric arc spraying, their dreams were restored, which was a mandrel prepared in such sintering by re-creating the film in the following way: re-creating the film only in the top zone with the help of electric arc spraying from the front with the help of electric arc spraying with shot blasting only for the zone after pre-stitching operations, and pro- tops can have a long service life. rollers without blasting. In addition, with such a partial restorative treatment

After such restorative treatment, the B film in the cylinders - the consumption of the material used for the crushing part of the mandrel remained in the state after blasting, and the iron wire, used in the operations of pre-stitching Woven for electric arc spraying, can also be rolled. be reduced, therefore, this treatment is economical

The mandrel after restorative treatment C was beneficial and has advantages. Thus, it is desirable to use a combat frame prepared in a way that does not allow it to be used as a tool. film formation only in the area of the top of the mandrel by the method of 6 M hm blast-jet processing of only this area of the mold and electrospray sputtering of floats. after previous flashing; and only the top of the mandrel was re-created by impacting the film with the help of electric arc welding. Now we will describe the method of restoration and calving only in this zone. In this mandrel after restoration. to . . of processing from the film in the cylindrical part of the technological line for restoration, suitable for remaining in condition after use in the operation - for restoration of the piercing mandrel, which corresponds to previous piercing and rolling. gives this invention. . . In Fig. 11 schematically shows the whole con- and as shown in Table 5, in the case of the mandrel, the figuration of the technological line for restoration with after the restoration treatment A, namely, after the fineness- for the purpose of re-use of the flashing mandrel- ruminal treatment of the entire surface followed by the electric corresponding to the present invention. As shown by the three-arc spraying, the number of consecutive pro- on this drawing, the technological line for re-stitching passes was 6. In the case of the mandrel, the mandrel contains; device 20 for feeding and after the restorative treatment 3, namely, after crushing the rod; device ZO for replacing the mandrel; surface treatment of the stem of the top of the mandrel with a shot blasting device; and the 5O device with electric arc spraying only in the area of electric arc spraying, which form the line of the top, the number of successive passes of the stitching of the restoration of the mandrel of the sequential type. would also make and. thus, the service life that the Device 20 for supplying and receiving the rod can be reached was equal to the service life of the shoe in the immediate vicinity of the mandrel after the restorative treatment A. | | th rolling mill 10. which is part of the

On the other hand, in the case of the mandrel after restoration for the manufacture of pipes by the method of processing B, namely, after the Mapesman electric arc. this device works continuously and sawing only in the area of the top of the mandrel without shot-feeds the rod 2 with the jet processing mandrel installed on it, the adhesion strength of the film in 1, the coating on which is created with the help of elect- the area of the top of the mandrel was low due to the exclusion

of rod spraying, in the piercing rolling mandrel and the device 40 of shot blasting, state 10. This device 20 of feeding and receiving the rod between the device 40 of shot blasting and equipped with two parallel lines 21 and 22, the system 50 of electric arc spraying, and between connected with a piercing rolling mill 10. a device 50 of electric arc spraying and devices

One of these lines, 21, is a extraction line 30, the replacement of the mandrel is carried out with the help of a mandrel 1. using a conveyor or the like. towed during sewing and rolling, together with Fig. 12 is a side view of the device with the rod 2 from the piercing rolling mill 10, and the replacement of the mandrel. In front of rod 2, another line, 22, is a feed line, recognized as mandrel 1, there is a manipulator for feeding rod 2 with a restored mandrel 31 for working with the mandrel and a table 32 for replacing the mandrel. which is installed on it, into the firmware pro- Manipulator 31 for working with the mandrel performs the rolling state 10. its functions in the following way: it transfers the mandrel 1,

The mandrel replacement device 30 is located and removed in such a way that it is next to the line 21 on the mandrel replacement table 32, and the conveyor between the device in the device 20 for feeding and receiving the mandrel replacement rod 30 and with a shot blasting device 40, and the mandrel replacement device 30 performs mine processing, and at the same time enables the following: takes from the line 21 of the rod extraction to recarry the restored mandrel 1 from the conveyor, which 2 with the mandrel 1 used in stitching is located between device 50 electric arc rolling, which is installed on it; replaces the sawing and mandrel replacement device 30, on the table 32, the mandrel 1 on the accepted rod 2 with the restored mandrel replacement (see Fig. 11 mentioned above). by the mandrel 1, which was corrected during the passage. On the other hand, below the rod 2 are located through the shot blasting device 40 and the mandrel replacement rollers 35, which serve as a support for the arc spraying lines 50; and then the rod 2 along its entire length, at the same time, the rod 2 with the restored mandrel 1, which makes it possible to lower and raise it, and it is installed, is attached to the feed line 22. as well as its forward and reverse movement

Work with rod 2 at these stages will be carried out in directions. In addition, behind the rod 2 is located with the use of a pusher, a conveyor, a mandrel replacement mandrel conveyor 36, of the type of a pre-pulator or the like. In this case, it represents a mobile cart, and the mandrel replacement device 30 performs the change of the mandrel of the rod 2 in forward and reverse automatically, and its specific design will be in the directions, and on this conveyor 36 of the mandrel replacement, described later with reference to Fig. 12 and Fig. 13. pusher 37 is located on the bottom of the mobile cart

The blast-jet processing device 40 represents a mandrel, intended for driving internally, a device intended for the execution of the outer rod 38, installed inside the shear: receiving the mandrel 1. used 2 for mounting or dismantling the mandrel during stitching and rolling and dismantled from the shear 1. the mandrel 2 in the device 30 for replacing the mandrel; and shot- Fig. 13(a) - Fig. 13(Y) are the cross-sections of the mine surface treatment of this mandrel 1. The mandrel 1, cross-sections of the essential elements, shown for illustration, are used for stitching and rolling, release of exemplary methods of assembly and disassembly from the film that remains on its surface, according to mandrels in the mandrel changer. These views show how the dismantling of the restoration stage takes place with the help of shot blasting, like the first roof. In this case, the device 40 of the mandrel 1, used in stitching and shot blasting, performs shot blast rolling, which is received from the extraction line 21. How to process in automatic mode, and it is specifically shown in Fig. 13(a), the rod 2 together with the mandrel structure will be described later with reference 1, used in stitching and rolling in Fig. 14. those installed on it are positioned on

The device 50 of electric arc spraying is a table 32 for replacing the mandrel with the help of a limiter. At the same time, the support in the device 40 blast-jet processing; re-mandrel 1 on the mandrel replacement table 32 serves to create a film on the open surface of the mandrel and 34, and the mandrel 1 is attached to the rod 2 by 1 with the help of electric arc spraying from the bends of the pressing forces from the pins 39. which by - using an iron wire; and the supply of the restored one is blocked by pushing the inner mandrel 1 into the device 30 for replacing the rod 38 in the rod. mandrels Mandrel 1 after blasting. Then, as shown in Fig. 13(5), the pusher 37 is subjected to electric arc spraying as the mandrel (Fig. 12) is moved forward in such a second stage of recovery, as a result of which the film is re-formed on the cone part of the inner rod 38 of the surface of the mandrel, which got into the position of the pins 39 and passed further allows you to get a restored mandrel, their coating, which leads to a decrease in the pressure forces on which is applied with the help of an electric arc rod 2 from the side of the pins 39, allowing demon- spraying. In this case, the device 50 electrifies the mandrel 1. After that, as shown in Fig. arc spraying excavates the electric arc spraying 13(c), the top of the inner rod 38 touches in automatic mode, and its specific lower surface inside the mandrel 1, while the design will be described later with reference to the position of the mandrel 1 is determined by the limiter

Fig. 15. 33 and internal bar 38.

Transfer of the mandrel 1 between the replacement device 30 Then, as shown in Fig. 13(4), the removal of the rod 2 in the direction of the end point on the rotary table 41 can be performed from the exit, while the end point of the stroke is determined by using the transporting articulated robot. rod 2 and inner rod 38, after which, In addition, although in Fig. 14 shows the device as shown in Fig. 13(e), the rod 2 together with the internal shot blasting of the type in which the driven position is moved back to the feed of the material for shot blasting by the split rod 38. After that, as shown in is carried out using compressed air,

Fig. 13(), in preparation for the installation of the next, this device can also be applied to the mud, in the mandrel, the inner rod 38 is further moved to which the supply of material for the shot blasting back to the intermediate position, in which the pins of the work are carried out due to the use of 39 are not pushed out. This is the dismantling of the mandrel 1, the centripetal force generated by the turbine wheel. used for stitching and rolling, cert- Fig. 15 is a side view of the sewing device. electric arc spraying. It has a rotary

The assembly of the restored mandrel 1 on the rod 2 of the table 51, which rotates around the vertical axis, can be carried out by performing the steps shown and the mandrel 1 after shotblasting of the spindle in Fig. 13(a)-Fig. 13(7), retroactively. a swivel is installed in the center of it

Fig. 14 is a side view of the table device 51. At the same time, the mandrel 1 is positioned for shot blasting. It has a rotating account of the entry of a protruding element (not the table 41 rotating around a vertical axis, shown), which rises in the center of the rotary and mandrel 1, used in stitching and rolling table 51, into the hole for inserting the rod, the location, vertically installed in the center of this pony on the back end of the mandrel. of the rotary table 41. At the same time, the mandrel 1 is positioned around the rotary table 51 due to the insertion of a protruding spray nozzle 52, intended for an element (not shown) that rises into the air to spray the material for spraying (Re - in the melon of the rotary table 41, in the hole for the insertion of pure iron wire, or Re and Mu - in the case of the rod (not shown), located on the rear iron wire, which contains Mu), melted to the top of the mandrel. Around the rotary table 41 under the action of an electric arc, in the direction of the mandrel 1, the feeding nozzles are located. 42, using compressed air or nitrogen gas. On no for supplying materials for shot blasting ob- Fig. 15 shows three spray nozzles 52, designs such as steel balls or aluminum grids to spray in the direction of the top, zero, in the direction of the mandrel C with the help of the first half of the cylindrical part and the second compressed air. In Fig. 14 shows the three feeding halves of the cylindrical part (the part above the nozzles 42, located for feeding in the correction direction) of the mandrel 1. towards the top, the first half of the cylindrical part, when rotating the rotary table 51 from different of the second half of the cylindrical part placed on it by the mandrel 1, the material for filling (the part performing the correction) of the mandrel 1. is sprayed from the spraying holes

Y, during the rotation of the rotary table 41 from displacements, 52, as a result of which the mandrel placed on it 1. materials for atomizing this material on the surface of the mandrel I. jet processing are supplied from the nozzles, which At the same time, each of the spraying nozzles, feed, 42, as a result of which the processing particles 52 can be properly set in motion by directed to the surface of the mandrel 1 with a highly articulated manipulator, and the film formed by the speed and thus can be entirely of oxides and Ge can be re-created on the removed film that remains on the surface of the entire surface of the mandrel 1. In addition, during the feeding of the mandrel 1. materials for sputtering the spray fo

The period of time required to remove the drawing, 52 can be brought and the movement separately, and the film on the mandrel used in sewing in such a way that the gradual increase and rolling takes place, with the help of shot blasting, the distance from them to the mandrel Y. processing , in the general case depends on the number of The period of time required to create a bone of the installed nozzles that feed, 42. the film using electric arc spraying, in

For example, in the case of one feeding nozzle, in general, it depends on the number of installation 42, it takes about 2 minutes, if there are two poured spray nozzles 52. For example, about half of the cost is sufficient in the case of one spray nozzle. time, namely, about 1 minute, and if there is 52, it takes about 3 minutes, if there are two or three nozzles, about one three nozzles is enough, about half of the tin (1/3) is enough, and exactly, about 40 seconds. of this time, namely, approximately 1.5 minutes, and, if

To reduce the period of time required, there are three nozzles, about one is sufficient for blasting, preferably a third (1/3). namely, about 1 minute; thus, the number of feeding nozzles installed 42. thus, the processing time period can be reduced

The reduction of the period of time required for compared to that required for the creation of shot blasting is also facilitated by the thickening of the scaled film by means of heat treatment. sion of pressure during the supply of shot jet materials - To reduce the period of time required from each nozzle that supplies 42 or the installation for electric arc spraying, it is desirable to increase the increased number of shot jet devices and the number of installed spraying treatments. nozzles, 52. Reducing the period of time required

In the shot blasting device, shown for electric arc spraying, also shown in Fig. 14, mounting or dismounting the mandrel 1 contributes to increasing the number of electrode devices

of sputtering as such. mandrel replacement.

In the electric arc spraying device, while Fig. 17 is a side view of the device shown in FIG. 15, mounting or dismounting of the mandrel 1 spraying of lubricant. In the mass spraying device, the rotary table 51 can be operated behind the rotary table 61, which is operated by a transporting articulated robot. melts around the vertical axis, and mandrel 1 after

Due to the use of the technological line of electric arc spraying, the mandrel, which has such a configuration, is vertically installed in the center of this rotary table 61. In this case, as discussed above, during the restoration of the mandrel, this mandrel 1 is positioned due to the insertion of the surface of the mandrel with shot blasting - removal of the protruding element (not shown), mine processing in order to remove the film that rises in the center of the rotary table 61. in remains, and then re-create the film on the hole for installing the rod, located on the resulting open surface of the mandrel behind the back end of the mandrel. From the outside, with the help of electric arc spraying, a sprayer for melting iron wire is located from the cutting table 61. nozzle 62, intended for spraying in the

Although at the same time, to restore the mandrel, the mandrel 1 is lubricated in the form of a mist for a short time for the shot blasting treatment with the help of compressed air. In Fig. 17 shows the film removal and the time for the electric arc force- a spray nozzle 62 installed to re-create the film, common for spraying in the direction of the top of the mandrel 1. the duration of time can be significantly reduced in comparison with the rotation of the rotary table 61 with exchange with the one required to create an oxide film formed on it with a mandrel I. the lubricant is sprayed in the form of a scale using a thermal spray nozzle, 62, in the result processing. what the surface of the film on its mandrel can be

Thus, the mandrel used in pro- is additionally covered with a layer of lubricant. In cases, sewing and rolling, can be restored in a short time when the lubricant contains water, it is desirable to excavate a period of time for reuse in drying the lubricant, for example, by hot povi- the process of stitching and rolling; therefore, even if it's a rum, after spraying. the number of mandrels is small, it is possible to provide In Fig. 18 schematically shows the generally satisfactory level of work efficiency, the configuration of another technological line for the restoration of the internal rolling stock. In addition to this, electric mandrels, in which the spraying device is installed, arc spraying can be performed in lubricants. structure, which has a simple design, using In the technological line for the restoration of the mandrel, an inexpensive wire as a material for spraying and, given in this view, a device 60 spraying - thus, this spraying can be carried out by applying lubricant located on the supply line 22, low expenses which is intended for transportation from the device

In addition, the technological line 20 considered above for supplying and receiving the rod to the piercing pro- to restore the mandrel can be installed in the rolling mill 10. In this case, the lubricant on parts enter the piercing rolling mill, which on rod 2 can be applied by spraying using a device 60 (spraying pipes according to the Manesmann method, which works in a safety nozzle 62, shown in Fig. 17) under time in the trans-rev mode, in the form of an automated line of porting the rod 2 from the mandrel installed on it for restoration, intended for the restoration of the mandrel 1, which is re-covered with a film, along the line of casting and replacement of mandrels in a short period of time. 22 innings.

Thus, the technological line considered above. The scope of this invention is not limited to the development of mandrel restoration, it allows to restore it with the above-mentioned variants of its implementation, as well as the mowing mandrels and reuse them, it is necessary to make various modifications that do not impair its effectiveness everything is beyond the scope of the present invention. For example, in the process of manufacturing seamless steel pipes, although above were described restoration and repetition of the whole. the use of a mandrel already used at

If it is necessary to apply such a scheme, during stitching and rolling, during stitching and rolling, on which surface of the mandrel that the mass will be re-created, a newly prepared film on it can also be used, a layer of lubricant is created on the mandrel, which is intended for it of the repeated rotation of the mandrel transportation between the device 50 of use in the same way. In addition to what applies to electric arc spraying and the device 30 of replacing the spraying method, a mandrel can be used, a spraying device can be installed, not only the technology of electric arc spraying, lubricants. but also the technology of gas-plasma sputtering

In Fig. 16 schematically shows the overall riding with the use of a wire. figuration of the technological line for recovery In the above-considered implementation options, the mandrel, in which the spraying device of the invention is installed, is a technological line for the recovery of lubricant. As shown in this drawing, the device of the threaded mandrel for the purpose of ITS repeated use of spraying lubricant must be dug out and has the following configuration, in which the mandrel is as follows: take the mandrel 1 with a film, re-mount it from the rod and separately expose it to such a stage created in the device 50 of electric arc deposition, reductive processing, such as shot blasting; to create a layer of lubricant on the surface of the film processing, electric arc spraying and, additionally, the mandrel 1; and feed this mandrel 1 into the lubricant spraying device 30, which is optional. But,

Claims (5)

(51) IPC (2011.01) КИ v218 25/00 and С23с 4/02 (2006.01) С23с 4/06 (2006.01) сС23с 4/10 (2006.01) STATE SERVICE OF INTELLECTUAL PROPERTY OF UKRAINE o; ТТ ЮІЕИКККІІИІІІІІОООТІТЬЬОООЬЬИЕІШШШШШШОЛІО.О ООЛІООИООВВОВООЛОВЛЛІЕИТОКОЛИЛОЬИХОХВОИСТЛООХХЬТТЬТЬИТНЬТЬТЬОСХХІХОТЛТИТТООХЗООТОВОООООВВЛОЛОВТИИОТОТИОТОИТНЯ» (54) ПРОШИВНА І ПРОКАТНА ОПРАВКА, СПОСІБ ВІДНОВЛЕННЯ ЦІЄЇ ПРОШИВНОЇ І ПРОКАТНОЇ ОП- РАВКИ І ТЕХНОЛОГІЧНА ЛІНІЯ ДЛЯ ВІДНОВЛЕННЯ ЦІЄЇ ПРОШИВНОЇ І ПРОКАТНОЇ ОПРАВКИ 1 2 (21) аго1006710 товщина плівки в зоні її вершини більша товщини (22) 20.10.2008 film in its cylindrical part. (24) 26.12.2011 6. Mandrel according to any of claims 1-5, which differs (86) PCT/Р2008/068950, 20.10.2008 in that it has a lubricants on the surface (31) 2007-285382 of the film. (32) 01.11.2007 7. Mandrel according to any of claims 1-6, which differs (33) UR in that the iron wire contains MU. (31) 2008 -151662 8. The method of restoring the flashing and rolling mill (32) 10.06. 2008 mandrel according to any of claims 1-7 for its repeated (33) UR use, which differs in that the back (46) 12.26.2011, Byul.Mo 24, 2011, the mandrel is subjected to shot blasting (72) HIDAKA YASUYOSI, DR, SHIMODA KASUHIRO, R, for removing the film from the mandrel used NAKAIKE KOUJI, UR, HIRASE NAOSYA, UR, HIGASIDA during stitching and rolling, after which with the help of YASUTO, OR, INAGE TAKATERU, OR, NAGAKITO electric arc sputtering using iron wire creates a film consisting of oxides and Ee. SU KAYUKI, UR 9. The method according to claim 8, which is distinguished by the fact that you (73) SUMITOMO METAL INDUSTRIES, LTD., UR of film removal using a shot jet (56) ОР 59013924 В2; 04/02/1984 processing and creating a film using electric 2. UR 2005220409 A; 18.08.2005, ruddy spraying is carried out only in the zone of UR 2000096205 A; 04.04.2000 of the mandrel made in the shape of a ball. UR 10249412 A; 22.09.1998 10. Technological line for the restoration of a broaching machine (57) 1. A broaching and rolling mandrel, intended for a rolling mandrel for its repeated use M. for its repeated use in broaching and in the broaching and rolling state, used in the rolling state , used in the production of seamless steel ("c") bending of seamless steel pipes, which is distinguished by the fact that it contains: part by the fact that it has a film consisting of approx. for receiving the rod, intended for i) sitting and Be, formed on the main surface for feeding the rod with the metal mandrel installed on it, which has passed through a shot blasting mandrel and receiving the rod after use in other processing, with the help of electric arc spraying - the process of stitching and rolling; with the use of iron wire. - mandrel replacement device, intended for receiving 2. The mandrel according to claim 1, which differs in that the bending of the rod after use during stitching of the zones occupied by oxides in the film is 55 and rolling from the feeding and receiving device - 80 9. of the rod, as well as feeding the rod into the feeding device r 3. The mandrel according to claim 1, which differs in that the time and reception of the rod after replacing the mandrel, the use of zones occupied by oxides in the film, on the side rotated during stitching and rolling, the recovery layer is higher, than on the base metal side. lazy mandrel; 4. The mandrel according to claim 3, which differs in that the time- - the shot blasting device, intended for weaving the zones occupied by oxides in the film, is not for obtaining the mandrel used in the course of more than 40 95 in the zone next to the base metal and 55- stitching and rolling, from the replacement device 80 Fo in the area of the surface layer. mandrels and blasting 5. The mandrel according to any of claims 1-4, which differs from the surface of the mandrel used during stitching by the fact that the mandrel is made in the form of a ball, and is made by rolling; and