KR102581807B1 - Roll forming machine for stainless pipe - Google Patents

Abstract

A pipe making device according to the present invention comprises a pair of pressing means (500) located between a first guide roll unit (300) and a second guide roll unit (400) along a transfer direction and pressing the left and right ends of a steel plate strip in a downward direction respectively at the rear of a welding unit in order to keep the height of the left and right ends of the strip plate sheet constant and minimize the gap between the left and right ends in the joint-welding process of welding the left and right ends of the plastically processed steel plate strip. In particular, when the pipe making device in the present invention requires a fine adjustment that is difficult to set only by operating a control program, by operating an adjustment knob (602) of an inclined support roll height adjustment means (600), the height of each inclined support roll (302) of the left and right first guide roll units (300R, 300L) and the left and right second guide roll units (400R, 400L) can be finely adjusted individually and independently.

Description

Pipe forming device capable of finely adjusting the height difference of welded joints {ROLL FORMING MACHINE FOR STAINLESS PIPE}

In the present invention, a steel strip (or steel strip) is passed through a roll forming line in which a plurality of forming roll assemblies are continuously arranged in a row, and the left and right edges of the strip formed into a circular or square pipe are pressed against each other in the longitudinal direction. This is an invention regarding a pipe manufacturing device that completes a product by welding the butt positions.

In general, a pipe manufacturing machine manufactures flat metal steel plates (materials) into circular pipes or square pipes. Such pipe manufacturing machines are equipped with forming parts, welding parts, and shaping parts, and the forming parts transform the material into multi-stage forming roll units. It is a facility that gradually forms a circular or square pipe as it passes, and the welding part is a facility that welds the butt position along the transport direction of the material with the left and right edges of the material molded into a circular or square pipe shape butted together.

In order to weld the left and right edges of a material molded into a predetermined shape during the above-mentioned pipe manufacturing process, a first guide roll unit (30,300) is installed at the rear and front of the welding position based on the material transportation direction to guide the material to be transported. and second guide roll units 40 and 400, respectively.

Figure 1 conceptually illustrates a welded part of a pipe manufacturing machine according to the prior art, and is provided with a first guide roll unit 30 and a second guide roll unit 40 to guide the conveyed material, respectively, and the two guide rolls A welding operation is performed between the spacing S between the units 30 and 40.

However, as shown in FIG. 2, the conventional guide roll unit 30 (40) is supported and transported only by a pair of left and right rolls 30L and 30R supported by a vertical axis, so both left and right edges of the material ( The left and right ends) do not contact each other at the correct height, or the left and right ends of the plastic processed strip are spread apart due to the springback phenomenon. Especially when producing large pipes with thick thick plate strips, stainless steel When producing pipe products made of materials with a large springback phenomenon, such as steel plates, there is a limitation in ensuring high quality of pipe products only with the structure of the guide roll unit shown in FIG. 2.

In other words, if the left and right ends of the plastically processed strip material do not contact each other at the correct height, or if the left and right ends of the plastically processed strip spread due to the springback phenomenon, not only will the welding quality of the joint become poor, but the cross section will also deteriorate. This can result in non-uniform products being produced. In particular, semi-finished products that are welded while maintaining the difference in height between the left and right ends of the plastically processed strip are excessively cut in certain areas while passing through the shaping part, so there is a risk that the pipe cannot be used as a high-pressure pipe due to the thickness becoming thin in that area. It may be caused.

Korean Patent No. 10-0228252 Korean Patent Publication No. 10-2003-0063269 Korean Patent No. 10-0535919 Korean Patent No. 10-1058341

The present invention was created to solve the problems described above,

The purpose is to keep the height of the left and right ends of the formed strip steel plate constant during the welding process of welding the left and right ends of the plastically processed steel strip while passing through the formed part.

In addition, the purpose of the present invention is to minimize the gap between the left and right ends of the strip steel sheet in a welding process in which the left and right ends of the plastically processed steel strip are jointly welded while passing through the forming part.

Furthermore, the purpose of the present invention is to enable the replacement of only the support rolls that support the plastically processed steel sheet strip in the welding process, thereby enabling the production of products of various specifications in small quantities with only one welding part facility.

In order to achieve the above object, in the pipe manufacturing device, which consists of forming parts, welding parts, and shaping parts, and manufactures round or square pipe products by passing the conveyed steel strip strip through forming roll assemblies at various stages of conveyance,

The welded part of the pipe manufacturing device according to the present invention includes a first guide roll unit 300 having a support roll that guides the circular or square pipe formed while passing through the forming part from the rear based on the transfer direction, and the first guide roll unit 300. A second guide roll unit 400 equipped with a support roll guiding from the front of the guide roll unit, and the left and right sides of a steel sheet strip located between the first guide roll unit and the second guide roll unit and butted against each other by plastic processing. It is provided with a welding unit (W) that jointly welds the ends, and both the first guide roll unit 300 and the second guide roll unit 400 are positioned at the upper position of the product with respect to the horizontal plane including the center of the product. It is provided with an inclined support roll 302 supported in a direction toward the center, and further includes an inclined support roll height adjustment means 600 for adjusting the height of the inclined support roll 302, so as to provide inclined support of the guide roll unit. It is characterized by the ability to finely adjust the height of the roll 302.

In addition, the pipe manufacturing device according to the present invention is located between the first guide roll unit 300 and the second guide roll unit 400 or between the first guide roll unit 300 and the molded part along the transfer direction. Therefore, it is characterized by further comprising a pair of pressing means 500 that press the left and right ends of the steel strip respectively in the downward direction.

In particular, the pressing means 500 includes a pressing roll 502 that presses the left and right ends of the plastically processed steel strip in a downward direction, and a lifting rod 504 that supports the axis of the pressing roll 502 and moves up and down, Another feature of the present invention is that it includes a pressing driving means 510 that raises and lowers the lifting rod 504 to adjust the height of the pressing roll 502.

Furthermore, the pipe manufacturing device according to the present invention operates the support rolls constituting the first guide roll unit 300 and the second guide roll unit 400 at an upper position with respect to the horizontal plane including the center of the processing object. By being composed of an inclined support roll 302 to support in the direction toward the center, the gap between the left and right ends of the strip steel sheet is minimized in the welding process of welding the left and right ends of the plastically processed steel strip while passing through the forming part. It is characterized by

In addition, in order to prevent sagging or deformation of the material subjected to downward force by the inclined support rolls 302 of the first guide roll unit 300 and the second guide roll unit 400, the first guide roll unit 400 The roll unit 300 and the second guide roll unit 400 further include a lower roll unit 200 that supports the lower surface of the material.

In addition, an inclined support roll 302 provided in the first guide roll unit 300 on both left and right sides, an inclined support roll provided in the second guide roll unit 400 on both left and right sides, and an inclined support roll provided in the lower roll unit 200. All of the lower support rolls 202 are configured to be detachably coupled to each main bracket 340, so that support rolls of various specifications can be replaced with just one facility, enabling small quantity production of various types.

Another problem to be solved by the present invention and its specific solution will be explained in more detail in the ‘specific details for carrying out the invention’ described later and in the accompanying drawings.

The pipe manufacturing device according to the present invention maintains the left and right ends of the plastically processed strip at the same height while passing through the molded part, and does not spread the area to be welded (i.e., the area where the left and right ends of the plastically processed strip meet). By being able to perform the welding process, it becomes possible to produce high-quality pipe products using materials such as large pipe products using thick thick plate strips or stainless steel strips.

In addition, since the backup rolls can be replaced according to the specifications of the product to be produced, it is possible to produce a variety of products in small quantities by replacing backup rolls of various specifications with just one welding part facility.

Other effects of the present invention will be explained in more detail in the ‘specific details for carrying out the invention’ described later.

Figure 1 is a perspective view conceptually showing the welded parts of the pipe manufacturing device.
Figure 2 is a front view showing an embodiment of a conventional general guide roll unit of a pipe manufacturing device.
Figure 3 is a plan view showing the concept of a welded part according to a preferred embodiment of the present invention.
Figure 4 is a front view showing the pressing means 500 as a preferred embodiment of the present invention.
Figure 5 is a side view of Figure 4
Figure 6 is a rear view of Figure 4
Figure 7 is a front view illustrating the coupling and operating relationship between a pair of left and right guide roll units, a pressing means, and a lower roll unit that constitute the welded part of the present invention.
Figure 8 is a front view illustrating the operating position change state of the guide roll unit, pressing means, and lower roll unit when the specifications of the processing object are changed.
Figure 9 is a side view of Figure 7, and is an explanatory diagram schematically showing the coupling relationship between the first guide roll unit 300, the second guide roll unit 400, the pressing means 500, and the lower roll unit 200.
Figure 10 is a configuration diagram of the guide roll unit viewed from the direction AA of Figure 7
Figure 11 is a configuration diagram of the guide roll unit viewed from direction B in Figure 7
Figure 12 schematically shows the coupling relationship between the molding part (roll stand for molding), the first guide roll unit 300, the second guide roll unit 400, the pressing means 500, and the lower roll unit 200. one side view
Figure 13 is a plan view of Figure 12
Figure 14 is a front view illustrating the coupling and operating relationship between a pair of left and right guide roll units, a pressing means, and a lower roll unit according to an embodiment equipped with an inclined support roll height adjustment means 600.
Figure 15 is an explanatory diagram showing an inclined support roll height adjustment means for raising and lowering the inclined support roll 302 of the guide roll unit.
Figure 16 is an explanatory diagram explaining the operating relationship of the inclined support roll height adjustment means

Since the present invention can be subject to various changes and can have various forms, implementation examples (or embodiments) will be described in detail in the text. However, this is not intended to limit the present invention to a specific disclosed form, and should be understood to include all changes, equivalents, and substitutes included in the spirit and technical scope of the present invention.

In addition, in each drawing, the components are expressed exaggeratedly large (or thick), small (or thin), or simplified in size or thickness in consideration of convenience of understanding, etc., but as a result, the scope of protection of the present invention is interpreted as limited. It shouldn't be.

The terms used in this specification are merely used to describe specific implementation examples (sun, aspect, aspect) (or examples), and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly dictates otherwise.

In this application, terms such as ~includes~ or ~consists of~ are intended to designate the presence of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification, but are intended to indicate the presence of one or more other features. It should be understood that this does not exclude in advance the possibility of the existence or addition of elements, numbers, steps, operations, components, parts, or combinations thereof.

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by a person of ordinary skill in the technical field to which the present invention pertains. Terms defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related technology, and unless explicitly defined in the present application, should not be interpreted in an ideal or excessively formal sense. No.

The first ~, second ~, etc. described in this specification are only used to distinguish different components, and are not limited by the manufacturing order, and the names may not match in the detailed description and claims of the invention. You can.

In describing the roll forming device according to the present invention with the accompanying drawings, for convenience, the approximate direction reference is specified with reference to FIGS. 3 and 9,

The direction in which the object (P) to be molded moves (the direction of the arrow in FIG. 3) is defined as 'forward' or the front direction, and the opposite direction is defined as 'backward' or the rear direction. Based on 7, the direction of the base 110 of the piping device is defined as 'downward' or downward, and the opposite direction is defined as 'upward' or upward. In addition, based on FIGS. 7 and 8, the left direction of the drawing is defined as 'left' or left direction, and the opposite direction is defined as 'right' or right direction, so that the coupling relationship of each component is defined. Explain. For example, the first guide roll unit shown on the right side of FIG. 3 is referred to as the left first guide roll unit 300L because the arrow direction in FIG. 3 is referred to as the front, and the first guide roll unit shown on the left side of FIG. 3 is referred to as the left first guide roll unit 300L. The first guide roll unit is referred to as the right first guide roll unit (300R). The second guide roll unit shown on the right side of FIG. 3 is referred to as the left second guide roll unit 400L, and the second guide roll unit shown on the left side of FIG. 3 is referred to as the right second guide roll unit 400R.

And in other drawings and the detailed description and claims of the invention related thereto, directions are specified and described according to this standard, unless otherwise specified.

Hereinafter, the pipe manufacturing device according to the present invention will be described in detail with reference to the accompanying drawings, focusing on preferred embodiments.

Figure 3 is a plan view showing the concept of a welded part according to a preferred embodiment of the present invention, in which the material to be welded (material that has passed through the molded part and been plastic processed into a predetermined shape) (P) is supported by the left and right guide roll units. It shows the state.

In order to prevent the area to be welded from opening as shown in Figure 1, the welded part according to the present invention is characterized by being provided with a pressing means 500.

As shown in FIG. 3, the pressing means 500 is located within the separation distance (S) between the first guide roll unit 300 and the second guide roll unit 400 based on the transport direction of the material, Press the left and right ends of the material downward.

Figures 4 to 6 are diagrams illustrating in detail the configuration of the pressing means 500 according to a preferred embodiment of the present invention. Figure 4 shows a front view of the pressing means 500, and Figure 5 is a view of the pressing means 500 in Figure 4. It is a side view, and Figure 6 shows the rear view of Figure 5.

And, Figure 7 is a front view illustrating the coupling and operating relationship between the pair of left and right guide roll units, the pressing means, and the lower roll unit that constitute the welded part of the present invention.

<Push means (500) structure and lifting control>

As shown in Figures 4 to 7, the pressing means 500 according to the present invention is composed of a left and right pair to press the left and right ends of the plastically processed steel strip, respectively, so hereinafter, either the left or the right side will be used. The explanation is based on the pressing method. Reference numeral 500R refers to the right pressing means, and 500L refers to the left pressing means.

The pressing means 500 according to the present invention includes a pressing roll 502 that presses the left or right end of the plastically processed steel sheet strip in the downward direction, and the lower end is a rotating shaft (hereinafter referred to as 'press roll axis') of the pressing roll 502. ') (503) is supported, and the upper part is provided with a lifting rod (504) that goes up and down while being guided by a lifting guide (507). And the upper end of the lifting rod 504 is connected to the pressing driving means 510, and the lifting rod 504 is raised and lowered by receiving the driving force of the pressing driving means 510.

The push driving means 510 may be a lifting cylinder or a servo motor, and a servo motor may be preferable for automatic position control, which will be described later. When a servomotor is applied as an embodiment of the pressing driving means 510, the lifting rod 504 is driven by the driving force of the servomotor by employing a screw jack (hereinafter referred to as 'first screw jack') 514. The height of the press roll 502 can be adjusted by raising and lowering it.

The pair of pressing means 500 are fixed by the upper horizontal frame 102, and the lifting guide 507 can be firmly supported by the rear vertical frame 103. Reference numeral 512, which is not explained in FIG. 5, indicates a coupler that transmits the rotational force of the motor.

FIG. 6 is a view showing a pair of pressing means 500 viewed in the direction of the arrow in FIG. 5, wherein the cross-section of each left and right pressing roll (500R) (500L) has a shape corresponding to the cross-sectional shape of the finished product. It is desirable. As an embodiment of the present invention, the cross-section of the product shown in the accompanying drawings is circular, so it is preferable that the cross-sections of each of the left and right push rolls 500R and 500L are arc-shaped.

In addition, as shown in FIGS. 4 and 6, it may be considered to provide a lubricant supply pipe 505 for injecting lubricant between the shaft number 506 supporting the push roll shaft 503 and the push roll shaft 503. You can.

By means of a pair of pressing means 500 configured as described above, the material to be welded (passed through the molded part and plastically processed into a predetermined shape) is placed between the first guide roll unit 300 and the second guide roll unit 400. By keeping the height of the left and right ends of the material (P) constant, the quality of the welded area can be improved.

The pressing means 500 according to the present invention can be applied to the production of products of various specifications by controlling the pressing driving means 510. That is, as shown in FIG. 4, when producing a product (P2) with a large outer diameter, the pressing driving means 510 is driven to raise the lifting rod 504 to the reference position of the pressing roll 502. can be set high (refer to the rising position of the pressing roll shown on the right side of Figure 4), and when producing a product (P1) with a small outer diameter, the pressing driving means 510 is driven to lift the lifting rod 504. The reference position of the press roll 502 may be set low by lowering (refer to the lowered position of the press roll shown on the left side of FIG. 4).

The pair of pressing means 500 configured as described above may be installed between the first guide roll unit 300 and the second guide roll unit 400, but as shown in FIGS. 12 and 13, the 1 It is also possible to install it between the guide roll unit 300 and the molded part.

Figure 12 shows a modified example in which the pair of pressing means 500 is provided between the molding part (roll stand for molding) and the first guide roll unit 300, and Figure 13 is a plan view of Figure 12. It is shown.

<Structure and position adjustment of guide roll unit supporting in the inclined direction>

Next, the structure and operational relationship of the first guide roll unit 300 and the second guide roll unit 400, which are another feature of the present invention, will be described.

Since the first guide roll unit 300 and the second guide roll unit 400 have the same configuration except that their installation positions are located in the front or rear of the transport direction, hereinafter they are collectively referred to as guide rolls. Referred to as a unit.

Unlike the conventional guide roll unit that supports the left and right end surfaces of the object to be welded while being supported by a vertical axis as shown in FIG. 2, the guide roll unit of the pipe manufacturing device according to the present invention is the first guide roll unit 300. and the second guide roll unit 400 are both characterized in that they apply a support force in a direction toward the center of the processing object from an upper position based on a horizontal plane including the center of the processing object. That is, the support roll of the guide roll unit according to the present invention is characterized by being composed of an inclined support roll 302 that applies a support force in an inclined direction from an upper position relative to the horizontal plane in a downward direction toward the center of the processing object.

That is, as shown in FIGS. 7 and 8, the inclined support rolls of the left and right first guide roll units 300L and 300R are symmetrically disposed with respect to the vertical virtual plane including the center of the processing object. The two supporting forces applied by (302) form an angle roughly in the shape of '∨' while heading toward the center of the processing object.

When the cross-sectional shape of the object to be processed is shown in FIGS. 7 and 8, the two support forces applied by the left and right inclined support rolls 302 and the support force applied by the lower support roll 202 form an angle of approximately 120 degrees. It is more desirable to apply an even support force around the outer surface of the object to be processed.

Figure 7 is a front view illustrating the coupling and operating relationship between the pair of left and right guide roll units, the pressing means, and the lower roll unit that constitute the welded part of the present invention, and Figure 8 shows the guide when the specifications of the product to be processed are changed. This is a front view explaining the change in operating position of the roll unit, pressing means, and lower roll unit.

And, Figure 9 is a side view of Figure 7, schematically showing the coupling relationship between the first guide roll unit 300, the second guide roll unit 400, the pressing means 500, and the lower roll unit 200. 10 is a configuration diagram of the guide roll unit viewed from the direction A-A of FIG. 7, and FIG. 11 is a configuration diagram of the guide roll unit viewed from the direction B of FIG. 7.

The left and right first guide roll units (300L) (300R) and the left and right second guide roll units (400L) (400R) according to the present invention are respectively positioned above the horizontal plane as shown in FIG. 7. In order to apply a support force in a direction inclined downward toward the center of the processing object, a sliding guide 314 inclined downward toward the product is provided at upper positions on the left and right with respect to the horizontal plane. The sliding guide 314 is supported on an inclined guide frame 106, and the inclined guide frame 106 can be coupled to the left and right vertical frames 104, respectively.

The inclined support roll 302 is rotatably coupled to a vertical bracket 330. The vertical bracket 330 is an upper bracket 332 that supports the upper and lower ends of the rotation axis 303 of the inclined support roll 302, respectively. ) and a lower bracket (331). The vertical bracket 330 configured in this way is coupled to the main bracket 340 with a fastening bolt 341, and the main bracket 340 is coupled to the movable plate 337. With this configuration, the inclined support roll 302 advances toward the center of the object to be processed or moves in the opposite direction along the sliding guide 314 together with the movable plate 337 by the position adjusting means 310, which will be described later. It goes backwards. The position adjusting means 310 is coupled to a fixed frame 108 fixed perpendicular to the inclined guide frame 106, and moves the movable plate 337 and the sliding guide 314 forward and backward in a straight line. Control.

The position control means 310 may be comprised of components such as a linear transfer cylinder or a drive motor. In one embodiment of the present invention, the position adjustment means includes a drive motor 310 and a screw jack (hereinafter referred to as a 'second screw jack') 314 that converts the rotational force of the drive motor into a linear reciprocating motion in the right angle direction. It consists of

The inclined support roll 302 is inclined with respect to the base 110, but has a rotation axis 303 that is perpendicular to the sliding guide 314 and the upper bracket 332 and lower bracket 331. , the inclined support roll 302 can apply an even support force to the entire surface of the object to be processed.

In particular, since the inclined support roll 302 according to the present invention has a structure in which the upper and lower ends of the rotating shaft are supported by the upper bracket 332 and the lower bracket 331, respectively, it supports the conventional cantilever type in which only the lower end of the rotating shaft is supported. Superior rigidity can be secured compared to the roll rotation axis (refer to the rotation axis structure of the backup roll shown in Figure 2).

Although not shown in the drawing, the second guide roll units (400L) (400R) on the left and right are also identical in configuration to the first guide roll units (300L) (300R), so the second guide roll units (400L) (400R) The explanation regarding is omitted.

Incidentally, each of the left and right first guide roll units (300L) (300R) may be composed of one inclined support roll, and as a preferred embodiment, as shown in FIGS. 10 and 11, a pair of inclined support rolls ( 302).

Reference numeral 315, which is not explained in FIGS. 7, 8, 10, and 11, indicates a support member that prevents the edge of the movable plate 337 from being separated, and reference numeral 320 indicates a support member for driving the position adjusting means 310. It refers to a position control rod that moves the movable plate 337 and the sliding guide 314 forward and backward while moving in a straight line, and the reference numeral 335 indicates a fixing member that secures the vertical bracket 330 to the main bracket 340. will be. In addition, reference numeral 336 indicates a reinforcement piece provided on the rear side of the main bracket 340 to reinforce the rigidity of the main bracket 340.

<Lower roll unit (200) structure and height adjustment>

In addition, the pipe manufacturing device according to the present invention has a structure in which the left and right guide roll units apply a support force in an oblique downward direction toward the product from the outer upper position of the processing object, so that the first guide roll unit 300 and the second guide roll unit 300 In order to prevent the product from sagging or deforming in the downward direction due to the inclined support force applied to the product from the guide roll unit 400, the product further includes a lower roll unit 200 that supports the lower surface of the product. do.

As shown in FIG. 9, the lower roll unit 200 according to a preferred embodiment of the present invention includes a first lower roll unit 200A that supports the lower part of the product at the position where the first guide roll unit 300 is provided. ) and a second lower roll unit (200A) that supports the lower part of the product at the position where the second guide roll unit (400) is provided. Since both the first lower roll unit 200A and the second lower roll unit 200B have the same configuration, hereinafter they will be collectively referred to as the lower roll unit 200.

The lower roll unit 200 according to the present invention includes a lower backup roll 202 having a rotation axis 203 arranged horizontally and perpendicular to the transport direction of the product, and both ends of the lower backup roll rotation axis 203. It is provided with a lower roll bracket 230 including a lower roll support frame 112 that supports it.

Furthermore, it is desirable to further include a lifting means 210 for lifting the lower roll bracket 230. The lifting means may include components such as a lifting cylinder or a driving motor. In one embodiment of the present invention, the lifting means includes a lifting motor 210, an electric shaft 211 that transmits the rotational force of the lifting motor, and a device that converts the rotational force transmitted through the electric shaft into a vertical lifting and lowering movement. It consists of a screw jack (hereinafter referred to as the 'third screw jack') (214).

The pipe manufacturing device according to the present invention configured in this way can ensure welding quality by maintaining the height of the left and right ends of the plastic strip at a constant level by pressing means 500 that presses the left and right ends of the plastically processed steel strip in the downward direction. In addition, the gap between the left and right ends of the plastically deformed pipe-shaped material can be minimized by pressing the left and right sides of the center of the plastically deformed pipe-shaped material diagonally downward from the top.

In addition, the first guide roll unit 300 and the second guide roll unit 400 are operated by the support force of the lower roll unit 200 that supports the lower surface of the material, the downward pressing force by the pressing means, and the guide It is possible to prevent sagging or deformation of the material that may occur due to the inclined support force provided by the roll unit.

When the cross-sectional shape of the object to be processed is circular, as shown in FIGS. 7 and 8, two support forces applied by the left and right inclined support rolls 302 and a support force applied by the lower support roll 202 are included. It is desirable that the bearing forces in three directions form an angle of 120 degrees so that a uniform bearing force is applied across the outer surface of the object to be processed.

<Structure for replacement of support rolls>

In addition, the pipe manufacturing device according to the present invention is characterized by being configured so that support rolls of a predetermined size can be easily replaced according to the specifications to be produced. That is, the inclined support roll 302 provided in the first guide roll unit 300 on both left and right sides, the inclined support roll provided in the second guide roll unit 400 on both left and right sides, and the inclined support roll provided in the lower roll unit 200. All of the lower support rolls 202 are configured to be detachably coupled to brackets supporting each.

First, the inclined support roll 302 provided in each of the guide roll units (300R (300L), 400R, and 400L) is located at the upper end of the rotation axis 303, as shown in FIGS. 7, 8, and 11. and the lower end are replaceable by a detachable pin 339 on the upper bracket 332 and lower bracket 331, respectively, and also include an inclined support roll 302, an upper bracket 332, and a lower bracket 331. The vertical bracket 330 is integrally coupled to the main bracket 340 in a detachable manner using a fastening bolt 341.

Figure 7 shows an example of a guide roll unit supporting a large diameter pipe, and Figure 8 shows an example of a guide roll unit supporting a small diameter pipe, shown in Figure 7. The specifications of the 'vertical bracket 330' including the inclined support roll 302, the upper bracket 332, and the lower bracket 331 are the 'inclined support roll 302, the upper bracket 332, and It can be seen that it is significantly larger than the standard size of the 'vertical bracket 330' including the lower bracket 331.

In this way, the 'vertical bracket 330 including the inclined support roll 302, the upper bracket 332, and the lower bracket 331' that matches the standard size of the product to be processed is selected and replaced with the main bracket 340. After mounting, the position adjusting means 310 is controlled to move the inclined support roll 302 to a predetermined position, and preparations for producing a product meeting the corresponding standard are completed.

In addition, the lower backup roll 202 constituting the lower roll unit 200 also passes through the lower backup roll 20 and is rotatably coupled to the left and right sides of the rotation shaft 203, as shown in FIGS. 7 and 8. Both ends are detachably coupled to the lower roll bracket 230 by fastening pins. In addition, when the height of the lower roll bracket 230 needs to be adjusted according to a change in the standard size of the lower backup roll 202, accurate position adjustment is possible by driving and controlling the lifting motor 210.

<Height adjustment of inclined support roll>

Although the welding process can be performed without the opening of the area to be welded by the pressing means 500 (i.e., the area where the left and right ends of the plastic processed strip come together), the strip in which a large springback phenomenon occurs is used as the material. Alternatively, when high-precision products must be produced, a structure capable of finely adjusting the height of the inclined support roll 302 can be applied, as shown in FIGS. 15 and 16.

For this purpose, the present invention proposes an inclined support roll height adjustment means (600).

Figure 14 is a front view illustrating the coupling and operating relationship between a pair of left and right guide roll units, a pressing means, and a lower roll unit according to another embodiment of the present invention equipped with an inclined support roll height adjustment means 600; FIG. 15 is an explanatory diagram showing an inclined support roll height adjustment means for raising and lowering the inclined support roll 302 of the guide roll unit, and FIG. 16 is an explanatory diagram explaining the operational relationship of the inclined support roll height adjusting means.

The inclined support roll height adjustment means 600 interposes a lifting plate 640 between the vertical bracket 330 and the main bracket 340 of the guide roll unit (300R (300L) (400R) (400L). While the plate 640 is integrally coupled to the vertical bracket 330, it is coupled to the main bracket 340 so that it can move up and down.

As shown in Figure 15, a slot 642 is formed in the lifting plate 640, and a movable plate 620, which will be described later, is inserted so that the movable plate 620 can be moved in the horizontal direction. In addition, the main bracket 340 is provided with a worm wheel 606, and an eccentric shaft 610 having a center eccentric to the center of the rotation shaft is formed on the rotation axis 608 of the worm wheel 606, and the eccentric shaft ( 610) is coupled to the movable plate 620. Sliding guides 620a are formed on the upper and lower sides of the movable plate 620 to guide the plate 620 so that it can move stably when moved in the horizontal direction within the slot 642. In FIG. 15, reference numeral 602 represents an 'control knob' equipped with a worm (not shown) for finely rotating the worm wheel 606, reference numeral 601 represents a housing, and reference numeral 609 represents a worm wheel rotation shaft 608. ) shows the bushing that supports it. Although not shown in the drawing, it is more desirable to provide a 'vertical guide rail' between the lifting plate 640 and the main bracket 340 to stably guide movement in the vertical direction.

The operating relationship of the inclined support roll height adjustment means 600 configured as described above will be described in detail with reference to FIG. 16. First, when the control knob 602 is turned, the worm wheel 606 moves slowly, and when the rotation shaft 608 of the worm wheel rotates, the eccentric shaft 610 provided at the end of the rotation shaft rotates. At this time, since the eccentric shaft has an eccentricity with respect to the central axis of the rotation shaft 608, the movable plate 620 coupled to the eccentric shaft moves up and down and left and right, and the slot 642 expanded in the horizontal direction ) The movable plate 620 inserted inside is free to move inside the slot 642 in the left and right directions, but is restrained by the slot 642 in the up and down directions, so it acts on the movable plate in the up and down directions. The force is transmitted as a force to elevate the entire lifting plate 640.

In this way, the horizontal force of the eccentric shaft 610 is extinguished by the force moving along the horizontal direction of the slot 642, and the vertical force of the eccentric shaft 610 is applied to the lifting plate 640 and the lifting plate ( By operating to raise and lower the vertical bracket 330 integrally coupled to 640), the effect of being able to finely adjust the height of the inclined support roll 302 of the guide roll unit is obtained.

[A] in Figure 16 shows that the lifting plate 640 when the eccentric axis 610 is located at the uppermost position is located at a height (h+) equal to the amount of eccentricity (h) compared to the reference position, and [B] in Figure 16 ] shows that when the eccentric axis 610 is located at the lowest position, the lifting plate 640 is located at a lowering height (h-) equal to the eccentric amount (h) compared to the reference position.

The pipe manufacturing device according to the present invention configured in this way not only allows the inclined support roll and the lower support roll to be easily replaced,

By setting (entering) in advance the position values of the optimal inclined support roll, lower support roll, and press roll suitable for producing products of a specific standard, and linking the position adjustment means, lifting means, and pressing drive means of the guide roll unit, , you can easily, quickly, and accurately set up the production preparation environment for welding part equipment just by replacing the support roll.

The control program can be implemented to operate in real time through an operation program in the PLC and a touch screen. When fine adjustment is required, which is difficult to set only by manipulating the control program, the first guide roll units 300R and 300L on the left and right and the second guides on the left and right are operated by manipulating the adjustment knob 602 of the inclined support roll height adjustment means 600. The height of each inclined support roll (302) of the roll unit (400R) (400L) can be finely adjusted individually and independently.

In the above description of the present invention, the preferred embodiments have been mainly described with reference to the accompanying drawings. However, the present invention can be modified, changed and replaced in various ways by those skilled in the art, and such modifications, changes and substitutions are within the scope of protection of the present invention. It should be interpreted as belonging. For example, in the description and accompanying drawings of the present invention, a screw jack has been exemplarily described as a component for converting the rotational force of the driving means into a linear motion in a direction perpendicular to the rotation axis, but the present invention includes the structure of the screw jack. It is not limited.

200, 200A, 200B: Lower roll unit
202: lower support roll 210: lifting means
230: Lower roll bracket
300: 1st guide roll unit
300L: 1st guide roll unit on the left 300R: 1st guide roll unit on the right
302: Inclined support roll 310: Position adjustment means
320: Position adjustment rod 330: Vertical bracket
340: Main bracket
400: Second guide roll unit
400L: Second guide roll unit on the left 400R: Second guide roll unit on the right
500: Pressing means
502: pressing roll 510: pressing driving means
504: Elevating rod
600: Inclined support roll height adjustment means
601: Housing 602: Control knob
604: Worm 606: Worm Wheel
608: worm wheel shaft 610: eccentric protrusion
640: Elevating plate 642: Elevating guide rail

Claims (4)

In the pipe manufacturing device, which consists of forming parts, welding parts, and shaping parts, and manufactures round or square pipe products by passing the conveyed steel strip through several stages of forming roll assemblies,
The welded part is,
A first guide roll unit 300 having a support roll that guides the circular or square pipe formed while passing through the forming part from the rear based on the transfer direction, and a support roll guiding the molded circular or square pipe from the front of the first guide roll unit. The second guide roll unit 400 is provided, and the left and right ends of the steel sheet strip are jointly welded at the welding position (WP) located between the first guide roll unit and the second guide roll unit and facing each other by plastic processing. Equipped with a welding unit (W);
Both the first guide roll unit 300 and the second guide roll unit 400 further include a lower roll unit 200 including a lower support roll 202 that supports the lower surface of the product;
Both the first guide roll unit 300 and the second guide roll unit 400 have an inclined support roll 302 that supports the direction toward the center of the product at an upper position based on the horizontal plane including the center of the product. Equipped with;
It is further provided with an inclined support roll height adjustment means (600) for adjusting the height of the inclined support roll (302),
The inclined support roll height adjustment means 600 is,
A lifting plate 640 is disposed between the vertical bracket 330 and the main bracket 340 of the guide roll unit (300R (300L) (400R) (400L), and the lifting plate 640 is connected to the vertical bracket (330). While it is integrally coupled to the main bracket 340, it is coupled to allow up and down movement;
A slot 642 is formed in the lifting plate 640 so that the movable plate 620 can be moved in the horizontal direction, and an adjustment knob 602 is installed in the main bracket 340. It is provided with a rotation shaft 608 that rotates, and an eccentric shaft 610 eccentric from the center of the rotation shaft 608, and the eccentric shaft 610 is coupled to the movable plate 620, and the eccentric shaft 610 ) The horizontal force acts as a force moving along the horizontal direction of the slot 642, and the vertical force of the eccentric shaft 610 is integrated with the lifting plate 640 and the lifting plate 640. By acting to elevate the combined vertical bracket 330,
A pipe manufacturing device characterized in that the height of the inclined support roll (302) of the guide roll unit can be finely adjusted.
delete According to paragraph 1,
It is located between the first guide roll unit 300 and the second guide roll unit 400 or between the first guide roll unit 300 and the forming part along the transfer direction, and the left and right ends of the steel sheet strip are placed at the bottom. A pipe making device further comprising a pair of pressing means (500) that apply pressure in each direction.
The method of claim 3, wherein the pressing means (500) is:
A press roll 502 that presses the left and right ends of the plastically processed steel strip in a downward direction, a lift rod 504 that supports the axis of the press roll 502 and moves up and down, and the lift rod 504 is raised and lowered. A pipe manufacturing device comprising a pressing drive means (510) that adjusts the height of the pressing roll (502).