KR200205923Y1 - Forming apparatus of the curved tubular moulds for continuous casting of steel - Google Patents

Abstract

This invention is to manufacture copper mold for continuous casting of steel, which is the core part of continuous casting equipment, which is the foundation of steel production, and it is possible to produce various types of solid mold tube molds with precise shape tolerances and excellent wear resistance and thermal conductivity. And an apparatus for manufacturing a curved tube ingot mold for continuous casting of steel, which satisfies lubricity and is easily formed in a two-step manufacturing process. The main cylinder 18 is formed to mold a mold 8 having various radii and shapes. Link pin 14 for forward and backward installation in the block housing 17 and the link center pin 13 in the center of the mandrel holder 19 with the centering pin 12 installed on the inside of the block housing 17. (15) is connected to the link 16 is installed, and the pressure block 10 is mounted between the inner and front link pins (14, 15) of the block housing 17, and the centering cam 11 to the outer upper end ) Is installed and the mandrel hole Mount the mandrel (1) at the lower end of the (19) and the compression coil spring (6) and the circumferential rotation preventing key (5) at the upper part of the hydrostatic bearing housing (4) opposite the mandrel (1) at the lower end thereof. Apparatus for manufacturing a curved tube ingot mold for steel continuous casting, characterized in that the locking shaft (3) is installed and a drawing die (2) is installed on the upper portion thereof, and a discharge mechanism (7) is installed at the lower end of the hydrostatic bearing housing (4).

Description

Forming apparatus of the curved tubular molds for continuous casting of steel}

This invention is to manufacture the mold for continuous casting of steel, which is the core part of continuous casting equipment, which is the foundation of steel production, and it is possible to produce various types of solid mold tube molds with precise shape tolerance, excellent wear resistance, thermal conductivity and The present invention relates to a curved tube ingot mold manufacturing apparatus for continuous casting of steel, which satisfies lubricity and can be molded by a simple manufacturing process.

Generally, copper continuous casting mold is classified into slab mold, beam blank mold, bloom mold and tube mold according to the product type. This is a process in which the steel is continuously passed through the copper mold and cooled to obtain the required shape. The shape of the tube mold should be a curvature shape to induce horizontally the water flowing down from the molten metal in consideration of heat shrinkage during the cooling process. As the cross-sectional shape should be gradually decreased, the shape tolerance is precise and excellent wear resistance, thermal conductivity and lubricity are required.

The conventional apparatus for manufacturing a tube copper mold processes a straight tube through which both ends of the copper tube penetrate to the length and shape required in the first process, as shown in FIG. 1, and the tube is mandrel when drawing in the second process. In order to prevent deviation from the mandrel, the end of the tube is divided into several processes and bent inward. In the third process, the outside of the tube is pressed in a direction perpendicular to the axial direction of the tube and bent in a curved shape. Finally, insert the tube into the mandrel that meets the dimensional accuracy required for the tube bent in the manufacturing apparatus in the fourth process, move it into the drawing mold, press the mandrel in the axial direction of the tube, and have the same inner shape as the outer shape of the mandrel. Copper molds were prepared.

As described above, the conventional method is weak in the curved tube drawing structure, so a large amount of deformation cannot be given during the drawing process. Therefore, before the drawing process, the bending method must be transformed into a curved shape similar to the curved shape of the final product. Since only a perfect product can be manufactured by a subsequent drawing process, the conventional manufacturing method has a problem such as a complicated manufacturing process and a lot of auxiliary equipment accompanying the change of the copper mold shape.

Therefore, the present invention is designed to solve the above-mentioned problems. As a result, a two-step manufacturing process is performed in which a billet of a predetermined size is extruded backward, and then the extruded cup tube is inserted into a mandrel and drawn. Phosphorus manufacturing was made possible, and the drawing process was greatly improved and stabilized, so that the amount of deformation during the drawing process could be largely given. Also, the amount of hardening of the work was larger than that of the existing method, and the wear resistance of the product was improved, thereby improving the product quality.

It is equipped with mandrel, drawing die and product discharge mechanism to flexibly cope with the shape change of the product. In order to structurally stabilize the linear and circular motions of the mandrel, the mechanical link structure is applied and the hydrostatic bearing is used for the drawing die. By providing a device that has excellent effect and high compatibility even in high load during radial movement of drawing die, it has molding force by axial load of automatic displacement mechanism that enables molding of molds of various radius and shape in the device. A drawing die mounted on the cylinder and the main cylinder, the block housing having a pressure block for applying the forward and backward axial loads of the automatic displacement mechanism, and a drawing die attached to the automatic displacement mechanism to face the mandrel drawing the mold; Locking shaft to allow radial motion of the drawing die The key to prevent the circumferential rotation of the locking shaft, the compression coil spring to return to its original position when the external force is removed, the hydrostatic bearing housing to enable the support and radial movement of the locking shaft, and the mold from the mandrel It is possible to provide a device capable of producing a copper mold by the discharge mechanism for discharging.

1 is a conceptual diagram showing a conventional copper mold manufacturing process and apparatus

2 is a conceptual diagram showing a mold manufacturing process according to the present invention

Figure 3 is a front, side structure diagram showing the overall structure of the subject innovation

Figure 4 is a perspective view and a partial cross-sectional view of the back-extruded blank and the molded mold of the present invention

5 is an overall structural diagram showing an operating state of the subject innovation

<Description of the symbols for the main parts of the drawings>

(1) mandrel (2) drawing die

(3) Locking shaft (4) Hydrostatic bearing housing

(5) Circumferential rotation preventing key (6) Compression coil spring

(7) Discharge Mechanism (8) Copper Mold

(10) Press block (11) Centering cam

(12) Centering Pin (13) Link Center Pin

(14) Forward link pin (15) Reverse link pin

(16) Link (17) Block Housing

(18) Main Cylinder (19) Mandrel Holder

Hereinafter, the configuration and operation of the present invention will be described in detail with reference to the accompanying drawings.

Figure 2 is a conceptual diagram showing a mold manufacturing process according to the present invention, Figure 3 is a front, side structure diagram showing the overall structure of the present invention, Figure 4 is a perspective view of the back-extruded blank and the molded mold of the present invention and Partial cross-sectional structure diagram, Figure 5 is an overall structural diagram showing the operating state of the present invention.

Mandrel holder 19 with main cylinder 18 installed in block housing 17 and centering pin 12 installed on top of block housing 17 to form molds 8 of various radii and shapes. Link center pin 13 is connected to the link 16 provided with the forward and reverse link pins 14 and 15 at the center of the center, and the link pins 14 and 15 for the inside and the reverse side of the block housing 17 are connected. The pressure block 10 is installed between the centers, and the centering cam 11 is installed at the outer upper end, and the mandrel 1 is mounted at the lower end of the mandrel holder 19, and the lower side is opposed to the mandrel 1 at the lower end. The hydrostatic bearing housing 4 is installed so that the circumferential rotation preventing key 5 is installed on the upper portion thereof to prevent the locking shaft 3 from rotating in the circumferential direction and the compression coil spring 6 on the upper portion of the locking shaft 3. ) And the drawing die 2 are installed, and the discharge mechanism 7 is installed at the lower end of the hydrostatic bearing housing 4.

In the figure, reference numeral 9 denotes a rocking shaft swing center point, 20 denotes a blank, 21 denotes a chamber, (C) a centerline, and (D) a displacement.

According to the present invention, the blank 20 is extruded backward so that the chamber 21 is at the bottom, and the blank 20 extruded by the manufacturing apparatus is inserted into the mandrel 1 to obtain a finished product. When described in detail by the embodiment as follows.

A blank extruded back to form a centering chamber 21 for forming a molding center when drawing a copper mold 8 at the bottom of the extruded product as shown in FIG. 4 (a) (linear tube 20) 3 is inserted into the mandrel 1 of the manufacturing apparatus, and the centering cam 11 is provided at the end of the mandrel holder 19 along the guide groove installed on the outside of the block housing 17. Push the mandrel (1) centering pin (12) installed on the left and right to push the forward link pin (14) in close contact with the center of the semi-circle formed on the pressure block 10 and at the same time start forming the mandrel (1) Align with the center line (C).

Maintaining the above state, the lower part of the chamber 21 of the blank 20 extruded by the lowering operation of the main cylinder 18 and the upper curved portion of the drawing die 2 are in close contact with each other. ) Stops for a while and the centering cam 11 is retracted so that the mandrel 1 can be easily rotated about the forward link pin 14.

When the centering cam 11 has completed the reverse movement, the main cylinder 18 proceeds in a descending operation to push the tube of the copper mold 8 extruded linearly into the drawing die 2 so that the inner side is placed in the mandrel 1. The outer surface is guided by the curved portion of the drawing die 2 to shape the copper mold (8).

At this time, due to the radius of curvature of the square corner portion of the mandrel (1), the displacement (D) between the device center line (C) during processing and the center of the link center pin 13 of the mandrel (1) is generated, The link center pin 13 is rotated about the forward link pin 14 to accommodate the displacement D of the mandrel 1 so that D) is automatically received, and at the same time, the drawing die 2 and the locking shaft ( 3) is radial movement while maintaining the vertical direction with the mandrel (1) around the locking shaft swing center (9).

At this time, the drawing die 2 and the locking shaft 3 are free to radially move without frictional resistance by the hydrostatic bearing installed in the hydrostatic bearing housing 4, and when the mandrel 1 descends to the set bottom dead center. The discharge mechanism 7 mounted at the lower end of the hydrostatic bearing housing 4 is advanced from both sides to clamp the outer periphery of the copper mold 8 formed on the outside of the mandrel 1, and the mandrel 1 is the main cylinder. When starting by 18, as shown in Figure 5, the reverse link pin 15 is in close contact with the semicircle formed in the pressure block 10, the center of the link center pin 13 is the opposite of the forward Draw the trajectory to induce the trajectory of the mandrel (1).

After the mandrel 1 returns to the top dead center (the original position), the drawn copper mold 8 is separated from the mandrel 1 and is molded into a finished product.

Finally, when the external force is removed from the drawing die 2, the drawing die 2 and the locking shaft 3 are returned to their original positions to wait for the next process by the circumferential rotation preventing key 5 and the compression coil spring 6. do.

The manufacturing apparatus of the present invention as described above has a centering cam 11, so that the link center pin 13 and the rocking shaft center point 9 can be exactly matched at the beginning of the drawing process, which is the most unstable processing, and thus the initial operation of the process is easy. When the downward pressure is applied, the downward actuation force of the main cylinder 18 is transmitted to the forward link pin 14 through the pressure block 10 via the block housing 17, and the forward link pin 14 is the link center pin. It is possible to draw stably by lowering the mandrel holder 19 and the mandrel 1 attached thereto by the drag operation instead of the pushing operation, and the upward actuation force of the main cylinder 18 is increased upon returning. It is transmitted to the reverse link pin 15 through the pressure block 10 and the back to the mandrel holder 19 and the mandrel (1) by the pulling operation to enable a stable operation can be performed.

The present invention accommodates the displacement of the mandrel 1 which is inevitably generated by using only the linear movement (rising, falling) of the main cylinder 18, and the drawing die 2 is always vertical in correspondence with the mandrel 1 It is configured to maintain the pressure and to induce the pressing force to work stably by the drag operation to produce an economical and high precision copper mold.

The present invention is not limited to the above-described specific preferred embodiments, and any person having ordinary skill in the art to which the present invention pertains may make various modifications without departing from the gist of the present invention claimed in the claims. Of course, such changes will fall within the scope of the claims.

Therefore, the present invention satisfies the precise dimensional and shape tolerances of curved tube ingot molds for various types of continuous casting of steel, and it is possible to reduce the manufacturing process by two-step process compared to the existing manufacturing method and reduce the cost. The densification of the crystal grains can provide a manufacturing apparatus having an effect of improving the required wear resistance of the copper mold.

Claims (2)

Mandrel holder 19 with main cylinder 18 installed in block housing 17 and centering pin 12 installed on top of block housing 17 to form molds 8 of various radii and shapes. Link center pin 13 is connected to the link 16 provided with the forward and reverse link pins 14 and 15 at the center of the center, and the link pins 14 and 15 for the inside and the reverse side of the block housing 17 are connected. The pressure block 10 is installed between the centers, and the centering cam 11 is installed at the outer upper end, and the mandrel 1 is mounted at the lower end of the mandrel holder 19, and the lower side is opposed to the mandrel 1 at the lower end. The hydrostatic bearing housing 4 has a circumferential anti-rotation key 5 installed thereon to prevent the locking shaft 3 from rotating in the circumferential direction, and the compression coil spring 6 on the top of the locking shaft 3. Steel, characterized in that the drawing die (2) is installed and the discharge mechanism (7) is installed at the lower end of the hydrostatic bearing housing (4) Curved pipe ingot mold manufacturing device for continuous casting. The method of claim 1, An apparatus for producing a curved tube ingot mold for steel continuous casting, characterized in that the hydrostatic bearing housing (4) is mounted on the lower end of the locking shaft (3) such that the drawing die (2) is always perpendicular to the mandrel (1).