JP2698031B2 - Removal method of unpacked billet of indirect extrusion press and removal equipment used therefor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for removing a closed billet of an indirect extrusion press and a removal apparatus used for the same.
Used for extruding metal such as aluminum.

[0002]

2. Description of the Related Art During an extrusion process by an indirect extrusion press,
When the billet in the container becomes unable to be extruded due to cooling or the like, the billet may be compacted, and it is necessary to remove the compacted billet from the container. Therefore, for example, Japanese Patent Publication No. 59-5049 Technology.

[0003]

Although the above-mentioned prior art is useful as such, the trough for receiving the stuffed billet is arranged along with the die stem on a slide frame which slides in a direction perpendicular to the press axis. There was such a problem. It is necessary to cut the extruded product before performing the compaction process.

[0004] The blind billet must be removed from the container using a blind die. Even if the die stem is attached to the slide frame and locked by the locking means, since it slides, the core of the die stem is liable to be out of order. In particular, in the case of an indirect extrusion press, the die stem is a tubular long object. Therefore, the misalignment increases.

[0005] For these reasons, a careful driving operation was inevitable, and in actuality, it took six hours or more for the compaction processing. In view of the above, the present invention provides a method in which a die stem can be taken out of a container while a die stem is arranged on a press axis in a compaction process, and the process can be completed within 30 minutes, and an unloading tool used therefor. Is the purpose.

[0006]

According to the present invention, a pressure stem 3 and a die stem 5 are provided before and after on a press axis, and a container 9 containing a billet 10 is advanced in the press axis direction to the die stem 5. During the extrusion of the billet 10 using the indirect extrusion press 1 to be covered, when the billet 10 is compacted in the container 9, the following method is used to take out the compacted billet 10 </ b> A. Taking technical measures.

That is, the method of the present invention provides a billet 10A.
When the compaction occurs, the pressure stem 3 is retracted, and a hollow body 15 accommodating and supporting the compaction billet 10A is interposed on the press axis between the pressure stem 3 and the container 9. Then, the forward force of the pressure stem 3 is applied to the hollow body 1.
The container 5 is transmitted to the container 9 via the container 5, and the packed billet 10A is taken out into the hollow body 15 by a relative operation accompanying the advance of the container 9.

[0008] Further, the take-out device of the present invention comprises a hollow body 15 which can be interposed on the press axis between the pressurizing stem 3 and the container 9 and which can accommodate and support the packed billet 10A. The hollow body 15 has an axial force capable of transmitting the forward force of the pressure stem 3 to the container 9.

[0009]

When the compaction phenomenon occurs during the extrusion, the pressure stem 3 is once retracted, and the hollow body 15 is interposed between the pressure stem 3 and the container 9 on the press axis. Thereafter, when the pressurizing stem 3 is moved forward, this forward force is transmitted to the container 9 via the hollow body 15, and as the container 9 covers the die stem 5, the pressed billet 10 </ b> A is taken out to the hollow body 15 by relative movement. Will be done.

Therefore, in the compacting process, the die stem 5 does not need to slide, and the extruded product does not need to be cut in advance.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. An indirect extrusion press 1 comprises a pressure stem 3 via a crosshead 2 and a die stem 5 via a counter frame 4.
Are arranged before and after on the press axis. The illustrated press 1 is illustrated as extruding a hollow material, so that the pressure stem 3 has a hollow cylindrical shape and a mandrel device 6 is inserted therein.

However, the present invention can be applied to a device for extruding a solid material. The die stem 5 has a cylindrical shape, and a die 7 for setting the outer diameter of the extruded material is attached to an extended end thereof, and a loose die is illustrated in the drawing. The pressure stem 3 can be moved back and forth in the axial direction of the press by a side cylinder device (not shown), and is driven by a pressing force generation device using a main ram, a main cylinder, and the like (not shown). Has a push plate 8 mounted thereon.

A container 9 is disposed between the pressurizing stem 3 and the die stem 5 so as to be movable back and forth in the direction of the press axis by a container moving cylinder or the like (not shown). Billet 10 being heated
And a shear device 11 is provided in the container 9. Therefore, in the illustrated embodiment, the inner diameter of the extruded material is set by the mandrel tip 6A of the mandrel device 6, and the die 7 sets the outer diameter of the extruded material. As a result, the billet 10 does not generate kinetic friction, and the hollow extruded material 12 is indirectly extruded by the container 9 covering the die stem 5. It is designed to cut and separate.

During the extrusion process, as shown in FIG. 2A, when the billet 10A cannot be extruded due to cooling of the billet, that is, when the billet 10A is clogged, the billet 10A is removed from the container 9 as follows. . First, the pressurizing stem 3 is once retracted as shown in FIG. 2 (B), and the removal device 13 shown in FIG. 1 (A) is interposed between the pressurizing stem 3 and the container 9.

The unloading device 13 has a receiving member 14 laid over the pressure stem 3 and a bottomed receiving hole 15A slightly larger than the billet outer diameter, and is a hollow body capable of receiving and supporting the pressed billet 10A. 15 and has a hook 16A for a hanging wire 16 formed by a hoist or the like. Therefore, the hollow body 1
5 is interposed between the pressurizing stem 3 and the container 9 on the press axis, and when a forward force is applied to the pressurizing stem 3 (by a pressing force generating device or the like), the force is applied to the container via the hollow body 15. 9, the container 9 is transferred to the die stem 5
As a relative motion, the closed billet 10A is taken out together with the insert 8 into the accommodation hole 15A.

The hollow body 15 has an axial force capable of transmitting the advancing force of the pressure stem 3 to the container 9 and does not buckle. After taking out the pressed billet 10A into the hollow body 15,
As shown in FIG. 2 (C), after the pressure stem 3 is retracted again and the hollow body 15 is pulled out, the compacted billet 10A and the extruded material 12 may be cut and separated by the shear device 11, and in the compacting process, Since the extruded material does not need to be cut and separated in advance, and therefore the die stem 5 does not need to be slid, the compaction processing time can be 30 minutes or less, and the misalignment of the die stem 5 can be prevented.

[0017]

As described above in detail, according to the present invention, the time required for the compaction processing can be shortened very much, and since the sliding of the die stem is not required, the misalignment can be prevented.

[Brief description of the drawings]

FIGS. 1A and 1B show an embodiment of the present invention, in which FIG. 1A is a cross-sectional view during a compaction process, and FIG.

2A and 2B show steps of a compaction process, and FIG.
(B) is a sectional view showing the retraction of the pressurizing stem, and (C) is a cutaway showing the cutting of the billet.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Press 3 Pressure stem 5 Die stem 9 Container 10A Closed billet 13 Removal tool 15 Hollow body

Claims (2)

(57) [Claims] 1. A pressure stem (3) before and after on a press axis.
And a die stem (5). The container (9) containing the billet (10) is advanced in the axial direction of the press to cover the die stem (5) using an indirect extrusion press (1). ) During extrusion of the billet (1).
0) when the billet (10A) is jammed in the container (9) when the billet (10A) is jammed. On the press axis center between the stem (3) and the container (9), a closed billet (10
A), a hollow body (15) that can accommodate and support A) is interposed, and then the forward force of the pressure stem (3) is transmitted to the container (9) via the hollow body (15), ) (1A)
A method for removing a closed billet of an indirect extrusion press, wherein the billet is removed into a hollow body (15). 2. A pressure stem (3) before and after on a press axis.
And a die stem (5). The container (9) containing the billet (10) is advanced in the axial direction of the press to cover the die stem (5) using an indirect extrusion press (1). ) During extrusion of the billet (1).
An unloading device for use in a method of unloading the packed billet (10A) when the container (9) is packed in the container (9), wherein a press shaft center is provided between the pressure stem (3) and the container (9). The billet can be interposed on the
A) a hollow body (15) that can accommodate and support A), the hollow body (15) having an axial force capable of transmitting the forward force of the pressure stem (3) to the container (9); An unloading billet removal device characterized by the following.