JPH022489Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an apparatus for producing shaped steel by hot extrusion.

[Conventional technology and its problems]

Conventionally, shaped steel is usually manufactured by rolling heated bloom with caliber rolls having a predetermined shape. However, this manufacturing method using rolling has the following problems.

(1) Manufacturing costs increase when producing in small quantities.

(2) If the steel shape is complex (for example, H-shaped steel), it is impossible to reuse it by rolling it down.

(3) Due to limitations in caliber processing, it is difficult to obtain shaped steel with complex shapes.

(4) It is difficult to manufacture steel shapes made of high-alloy steel.

For this reason, attempts have been made to manufacture shaped steel by hot extrusion, and some attempts have been made. However, although this method has the advantage of avoiding the problems associated with the use of caliber rolls, it has the fundamental problem of significant twisting and bending during extrusion, and this has been a major cause of hindering its widespread use.

The present invention was devised in view of such conventional problems, and aims to provide a hot extrusion device that can manufacture shaped steel while appropriately preventing twisting and bending.

[Means to solve the problem]

Therefore, in the present invention, a guide roller body is provided on the rear surface of the extrusion press to restrain the workpiece and suppress its deformation in the longitudinal direction.
A guide part for guiding the workpiece between the roller bodies is provided on the workpiece entry side of the roller body, and the guide part is configured such that the guide interval becomes narrower toward the roller body, The guide spacing can be made variable by making the positions of the four guide members forming the guide part adjustable in the cross-sectional direction of the guide part.

〔Example〕

Hereinafter, one embodiment of the present invention will be described based on the drawings.

In the figure, 2 is the container housing of the extrusion press 1, 3 is the container into which the heating billet is to be charged, 4 is the press plate, 5 is the die, 6 is the die holder, and 7 is the container housing of the extrusion press 1.
is a die holder backer, 8 is a bolster, 9 is a top platen, and die 5 is a hole type 10 for channel steel.
have.

In such a configuration, in the present invention, a roller guide 11 is provided on the rear surface of the extrusion press 1 to restrain the workpiece and suppress its deformation in the longitudinal direction.

This roller guide 11 is composed of roller bodies 13a and 13b rotatably held by a main body 12, and a guide section 14 that is provided on the front surface of the roller bodies 13a and 13b and guides the workpiece between the roller bodies, It is arranged by fixing the flange 15 of the main body 12 to the stepped portion 16 inside the bolster 8 with bolts 17.

A bracket 1 is installed on the opposite extrusion press side of the main body 12.
8 is provided, and the roller bodies 13a, 13b are held via this bracket 18. To adjust the roller spacing, the bearing member 1 of each roller body is
9 is attached to the bracket 18 so as to be able to slide up and down, and the shim 2 is connected between the bracket 18 and the bracket 18.
By inserting 0, the vertical position can be adjusted. Each bearing member 19 and shim 20
is removably fixed to the bracket 18 by bolts 21. The holding shaft 22 of each roller body 13 is supported by the bearing member 19, and the roller body 13 is rotatably attached to the holding shaft 22 via a bearing 23. The roller body 13 of this embodiment is designed to restrain the grooved steel web from both sides.

The guide portion 14 is provided on the extrusion press side of the main body 12, that is, on the front surface of the roller bodies 13a and 13b. This guide part 14 is composed of guide members 24 attached at four locations on the top, bottom, left and right inside the cylindrical part constituting the main body 12, and is adapted to guide the workpiece between the roller bodies 13a and 13b. . In order to adjust the guide interval, the upper and lower guide members 24 are attached so that they can slide up and down, and the left and right ones are installed so that they can slide left and right, and their positions can be adjusted by inserting shims 25 between them and the main body 12. It has become possible to do this.

Further, the guide surface 26 of each guide member 24 is inclined toward the workpiece feeding direction, so that the guide section 14 has a guide interval that is smaller than the roller body 13a,
It is configured to narrow in the direction of the roller bodies 13b, so that the workpiece can be smoothly guided between the roller bodies 13a and 13b without the extruded material colliding with the end of the guide member. I have to. Each guide member 24 and shim 25 has a bolt 27
It is removably fixed to the main body 12 by.

The roller guide 11 described above can be provided not only in the die rotating device as in this embodiment but also in the rear table of the extrusion press.

According to the device of the present invention as described above, the front glass disk 28 is arranged inside the container 3, the heating billet is pushed into the container 3 by the pusher 4, and the pusher 4 is moved forward under pressure. As a result, the material is extruded from the hole mold 10 of the die 5. The extrusion-molded workpiece is guided by the guide part 14 and is moved to the roller body 1 constituting the roller guide 11.
3a, 13b, roller bodies 13a, 13
By being restrained between b, bending or twisting in the longitudinal direction is suppressed, and the material is sent out of the device.

[Effect of idea]

According to the present invention described above, it is possible to appropriately prevent twisting and bending of the workpiece to be extruded, and it is possible to put into practical use the production of shaped steel by hot extrusion.

In addition, in the present invention, a guide section is provided on the front surface of the roller body, and the guide interval is configured to become narrower toward the roller body, so that the extruded material does not collide with the guide member. ,
The material can be smoothly guided between the roller bodies.

Further, since the position of the guide member forming the guide portion can be adjusted in the cross-sectional direction of the guide portion, and the guide interval is made variable, the above effects can be appropriately obtained regardless of the size of the shaped steel to be manufactured.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, in which Fig. 1 is a longitudinal sectional view, Fig. 2 is an enlarged view of a partially cutaway portion of the roller guide portion in Fig. 1, and Fig. 3 is a cross-sectional view taken along the line - in Fig. 2. FIG. 4 is a cross-sectional view taken along the line - in FIG. 2. In the figure, 1 is an extrusion press, 11 is a roller guide, and 13a and 13b are roller bodies.

Claims (1)

[Scope of utility model registration request] A guide roller body is provided on the rear surface of the extrusion press to restrain the workpiece and suppress its deformation in the longitudinal direction, and a guide roller body is provided on the workpiece entry side of the roller body for guiding the workpiece between the roller bodies. A guide portion is provided, the guide portion is configured such that the guide interval becomes narrower toward the roller body, and the position of the four guide members forming the guide portion is adjustable in the cross-sectional direction of the guide portion. A hot extrusion type steel manufacturing device that allows variable guide spacing.