RU2163178C1 - Device for deformed continuous castings production - Google Patents

Abstract

FIELD: ferrous metallurgy, particularly, devices for production of deformed continuous castings. SUBSTANCE: device has a mold with two reciprocating vertical walls whose working surface has a hollow accommodating sheet of refractory material. Surfaces of two inclined walls of mold have special milled recesses into which extensible built-up cover plate of refractory material is installed. Cover plate may consist of two sheets. Installed on internal side of external sheet, in recesses of various depth are thermocouples. Made on surfaces of mold vertical walls and adjacent sheet are recesses in which thermocouples are also installed. External sheet of extensible built-up cover plate is made of material with coefficient of thermal conductivity higher than that of wall metal. EFFECT: more comprehensive information on metal state in mold, improved quality of surface of produced castings, reduced time of mastering the technology of shaped deformed castings. 3 cl, 8 dwg

Description

 The invention relates to continuous casting of metals, namely, the design of the mold.

 A device for continuous casting of metal is known [patent N 2108198 RU. Device for continuous casting of metal / V.V. Stulov, V.I. Lonely. Publ. 04/10/98. Bull. N 10], selected as a prototype of the claimed device, containing a casting ladle with a glass, a mold with working walls, inside which thermocouples are installed and through channels for cooling water are drilled, an automated control system for the level of liquid metal in the mold, consisting of two vertical walls, made with the possibility of reciprocating movement, and two inclined in the upper part of the walls, made with the possibility of rotational movement, removable pads, GOVERNMENTAL with sloping and vertical portions mounted on the inner surfaces inclined at the top of the mold wall thermocouples installed along the inclined surface portions overlap and the ratio of magnitudes of distances between the place of installation of thermocouple and the working surface of each of the opposing cover plates is 0.4-0.5.

 The disadvantages of the known device for continuous casting of metal are the need for rearrangement of thermocouples when replacing removable linings in order to obtain deformed workpieces with a different surface profile. For the surface shape of the workpiece corresponds to the vertical section of the removable lining. In addition, the installation of thermocouples only in removable overlays on the walls of the mold inclined in the upper part does not fully determine the density of the heat flux by the entire mold and the total amount of heat removed from the metal.

 The inventive device is aimed at creating a highly efficient process for producing continuously cast deformed billets.

The technical result obtained by the implementation of the inventive device is as follows:
- obtaining more complete information about the state of the metal in the mold;
- improving the surface quality of the resulting workpieces as a result of the ability to control the thermal conditions of operation of all the walls of the mold;
- reducing the time spent on developing technology for producing profiled deformed workpieces.

 The inventive device is characterized by the following essential features.

 Restrictive signs: pouring ladle with a glass; a mold with working walls, inside of which thermocouples are installed and through channels are drilled for the passage of cooling water; a system for automated control of the level of liquid metal in the mold; the mold has two vertical walls, made with the possibility of reciprocating motion, and two inclined in the upper part of the wall, made with the possibility of rotational movement.

 Distinctive features: on the surface of two vertical walls, a recess is made in which a sheet of refractory material is installed; special grooves are milled on the surface of the walls inclined in the upper part of the mold wall, into which a retractable assembly plate made of refractory material is installed; a sliding prefabricated plate consists of two sheets, on the inner side of the outer sheet milled into different depths of the grooves into which the thermocouples are installed; on the surface of the vertical walls and adjacent sheet grooves are milled into which thermocouples are installed; The outer sheet of the retractable cover plate is made of a material with a higher coefficient of thermal conductivity than the metal of the wall.

 A causal relationship between the set of essential features of the claimed device and the achieved technical result is as follows.

 The implementation on the surface of two vertical walls of the recess allows you to install on the wall sheet of refractory material without moving it in the process. Installation on a vertical wall of a sheet of refractory material protects the surface of the wall from wear and eliminates the need to replace the entire wall during repair work. In addition, the presence of a sheet of refractory material protects the wall surface from overheating, increases the life of the walls, reduces the cost of their manufacture and allows the installation of thermocouples to control the process of casting metal.

 Performing special grooves on the surface of the mold walls which are inclined in the upper part allows installing a retractable assembly pad made of refractory material. Installing on the surface inclined in the upper part of the walls of the retractable assembly lining provides protection of the surface layer of the wall from wear and overheating. The implementation of a retractable prefabricated lining of refractory material allows casting in a mold of metals with different melting points.

 Performing grooves at various depths on the inner side of the outer sheet of the prefabricated overlay allows you to install thermocouples in them to control the casting process and determine the values of the heat flux densities in the wall with the subsequent determination of the total amount of heat removed by the mold.

 Performing vertical grooves on the surface of the vertical walls and adjacent sheet allows installing thermocouples in them for additional control of the casting process and determining the values of heat flux densities in the vertical wall.

 The installation of thermocouples in a sliding prefabricated plate on inclined walls in the upper part and in vertical walls is determined by various functions performed by these walls, as well as by various values of heat flux densities in them.

 The execution of the outer sheet of the retractable prefabricated lining of a material with a higher thermal conductivity than the metal inclined in the upper part of the wall allows you to adjust the values of the heat flux densities on all walls and the total amount of heat removed by the mold.

 In FIG. 1 and 2, a vertical wall is shown having a recess 1, a groove 2, and a channel 3 for water passage.

 In FIG. 3 shows a wall inclined in the upper part, having a special groove 4, a channel 5 for water passage, a removable cover 6, fixed by a bolt 7.

 In FIG. 4 and 5 show a retractable assembly plate consisting of an outer sheet 8 and an inner sheet 9, mounting bolts 10, grooves 11.

 In FIG. 6 shows a sheet of refractory material with a groove 12, which is mounted in a recess 1 in a vertical wall in FIG. 1.

 In FIG. 7 shows the appearance of the inventive device for producing continuously cast deformed billets.

 In FIG. 8 is a section AA in FIG. 7.

 The inventive device of FIG. 7 and 8 consists of a casting bucket 12 with a glass 13, a mold 14 with vertical walls 15 with channels 3 and grooves 2, a sheet 16 with a groove 12 and thermocouples 17, inclined at the top of the walls 18, with channels 5 and a retractable cover plate 19 s thermocouples 20, removable lining 6.

 When assembling the mold in the groove 2 of the vertical wall 15 and in the groove 12 of the sheet 16, thermocouples 17 are installed. The sheet 16 is fixed in the recess 1 on the vertical wall 15. Thermocouples are installed in the outer sheet 8 of the retractable cover plate 19 with the grooves 20. Then, the outer sheet 8 connected to the inner sheet 9 by fixing bolts 10. The assembled retractable assembly plate 19 is installed in a special groove 4 in the wall 18 inclined in the upper part. The removable plate 6 with the necessary working surface profile is fixed on the inclined in the upper part STI wall 18 with a bolt 7.

 The inventive device operates as follows.

 Preliminarily, a seed is installed in the mold 14, which prevents the pouring of the poured metal, and the supply of cooling water to the channels 3 and 5 of the walls is turned on. Liquid metal from the casting ladle 12 through the glass 13 enters the mold 14 and fills it. When the melt reaches a certain level of pouring, the mold 14 is turned on, while the vertical walls 15 make a reciprocating motion with the ejection of the workpiece, and the walls 18 inclined in the upper part rotate with compression of the crust of the crystallized metal and capture of the workpiece. The metal entering the removable pad 6, takes the necessary shape of the surface of the workpiece. The signals from thermocouples 17 and 20 are continuously processed in the automated process control system of the casting process with the determination of heat flux densities and thicknesses of the workpiece crusts on the walls 15 and 18. The thickness of the crusts formed on the walls 18 inclined in the upper part determines the degree of compression blanks, which is used in assessing the quality of the resulting blank. When developing the technology for producing deformed billets with desired properties, the thicknesses of crusts formed on walls 15 and 18 are adjusted by changing the flow rate of cooling water in the channels 3 and 5 of the walls and the metal casting speed. Replacing the removable lining 6 in order to obtain a workpiece with a different surface profile eliminates the need for rearrangement of thermocouples.

Claims (3)

 1. A device for producing continuously cast deformed billets, comprising a casting ladle with a glass, a mold with working walls, inside which thermocouples are installed and through channels for cooling water are drilled, an automated control system for the level of liquid metal in the mold, consisting of two vertical walls made with the possibility of reciprocating movement, and two inclined in the upper part of the walls, made with the possibility of rotational movement, removable overlays and characterized in that the working surfaces of the two vertical walls of a recess, in which is set a sheet of refractory material, and the inclined surface at the top of the walls of the mold are milled grooves, in which is installed a retractable team plate made of refractory material.  2. The device according to claim 1, characterized in that the retractable assembly plate consists of two sheets, the grooves are milled to different depths on the inside of the outer sheet, into which thermocouples are installed, and vertical grooves are also milled on the surface of the vertical walls and the adjacent sheet, which are installed thermocouples.  3. The device according to claim 2, characterized in that the outer sheet of the retractable precast gasket is made of a material with a higher coefficient of thermal conductivity than the metal of the wall.

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