JPH0745059B2 - Indirect extrusion press for copper or copper alloy - Google Patents

Description

The present invention relates to an indirect extrusion press for copper or copper alloys.

(Prior Art) In an indirect extrusion press, a billet made of a metal material is appropriately placed in a container, and then the crosshead and the container are integrally pressed to the die stem side by a pressing force generating means to move the billet in the container to the die stem. The extruded material is extruded to form an extruded material, which requires treatment of a shell that can be formed in the container when extruded.

Conventionally, shell processing methods include the method shown in FIGS. 14 to 18 and the method disclosed in Japanese Utility Model Laid-Open No. 62-105711.

In the former method, first, after the extrusion operation is completed, the die 2 in the container 1 is extruded by the die stem 3 and the die receiver 4
To remove it from the press (see Fig. 14). Next, after the container 1 is retracted to the crosshead 5 side (see FIG. 15), the cleanout disc 6 is carried into the tip position of the die stem 3 by the cleanout disc receiver 7 (see FIG. 16). Then, the container 1 is replaced with the distem 3
And the shell 8 remaining on the inner wall of the container 1 is ejected by the clean-out disc 6 (17th
(See the figure), and then the clean-out disc receiver 7 carries the clean-out disc 6 out of the press (see FIG. 18).

In the latter case, a cleaning ring is set at the tip of the die stem together with the die, and the shell on the inner wall of the container is scraped off by the cleaning ring at the same time during the extruding operation.

(Problems to be Solved by the Invention) In the former case, the removable clean-out disc 6
Therefore, its handling device is necessary.
In addition, since there is an operation of retracting the container 1 for loading the cleanout disc 6 to the tip of the die stem 3 and an operation of loading and unloading the cleanout disc 6, the idle time increases by that amount and the time required for one cycle. However, there is a problem in that the productivity becomes longer and the productivity decreases.

As a method for dealing with this, there is the latter cleaning method. However, in this method, the shell is removed during the extrusion operation, and therefore this method cannot be used in the case of copper or copper alloy.

That is, for aluminum or aluminum alloy, the billet temperature is about 400 ° C., and there is no problem. However, in the case of copper or copper alloy, the billet temperature is as high as 700 to 800 ° C, so removing the shell during the extrusion operation will shorten the life of the cleaning ring, and the cleaning ring must be replaced frequently. Inevitably, it will hinder productivity improvement.

In view of such a point, an object of the present invention is to make it possible to quickly remove the shell of the inner wall of the container and improve the durability thereof in the extrusion press for copper or copper alloy.

(Means for Solving the Problems) According to the present invention, a cylindrical container 10 that holds a billet 32 made of copper or a copper alloy therein, and a die stem 13 that can be inserted from one opening of the container 10 are provided. A seal block 14 that abuts the other opening of the container 10 to seal the opening, a crosshead 15 that holds the seal block 14, and a pressing force amount that is arranged on the side opposite to the container of the crosshead. And a crossing block 15 and the container 10 are integrally pressed against the die stem 13 by the pressing force generating means 16 in a state where the seal block 14 seals the other opening of the container 10. In a copper or copper alloy indirect extrusion press for extruding the copper or copper alloy placed in the container 10 from the die stem 13, a tip portion 24 having a diameter substantially the same as the inner diameter of the container 10 is used. In addition, a shell pusher 23 longer than the length of the container 10 in the longitudinal direction is detachably mounted on the surface of the seal block 14 on the side opposite to the crosshead, and the shell pusher 23 is inserted from the other opening of the container 10. By container
The shell 25 attached to the inner wall of the container 10 is discharged from one opening of the container 10.

(Operation) After the extrusion operation is completed, the shell 25 remaining on the inner wall of the container 10 is removed. In this case, first, the shell pusher 23 is set between the container 10 in the forward position and the seal block 14 of the crosshead 15, and then the container 10 is moved backward to the crosshead 15 side. Then shell pusher 23
Comes into contact with the seal block 14, and the tip 24 of the seal block
The shell 25 in 10 can be removed.

(Example) Hereinafter, the Example of this invention is described in full detail based on drawing.

In FIGS. 1 and 2, reference numeral 10 denotes a cylindrical container that holds a billet made of copper or copper alloy therein, and is attached to a container holder 11 that is movable in the front-rear direction. A counter frame 12 has a die stem 13 that can be inserted into one opening of the container 10. Reference numeral 14 denotes a seal block, which is configured to come into contact with the other opening of the container 10 for sealing, and the seal block 14 is held by a cross head 15 which is movable in the front-rear direction.
Reference numeral 16 denotes a pressing force generating means, which is arranged on the side opposite to the container of the crosshead 15. 17 is a cylinder for moving the container 10. 18 is a billet loader, 19 is a die charger,
Reference numeral 20 is a die ejector, which is rotatably mounted around the swivel shafts 21 and 22. Reference numeral 23 denotes a shell pusher, which has a tip portion 24 having substantially the same diameter as the inner diameter of the container 10 and is configured to be longer than the length of the container 10 in the longitudinal direction.
The shell pusher 28 is detachably attached to the surface of the seal block 14 on the side opposite to the crosshead, and the shell 25 attached to the inner wall of the container 10 is inserted into the other opening of the container 10 in one opening. It is configured to be discharged from the section.

That is, as shown in FIGS. 3 and 4, the shell pusher is
23 is fixed to a support plate 26, and the support plate 26 is slidably supported and guided by a pair of left and right support rods 27 and is urged by a spring 28 toward the stopper 29. A pair of support rods 27 are arranged on both sides of the seal block 14, and are rotatably supported by a lateral swivel shaft 30 on the crosshead 15 side. The swivel shaft 30 is connected to a rotary actuator 31, and the rotary actuator 31 swivels the shell pusher 23 between an eject position A coinciding with the axis of the container 10 and a retracted position B retracted downward by 90 °. It is like this.

Next, the operation of extruding the billet 32 made of copper or copper alloy will be described. First, as shown in FIG. 5, after setting the container 10 to the initial position, the billet loader 18 and the die charger 19 carry the billet 32 and the die 33 onto the axis of the press (see FIG. 6), The die is moved to the die stem 13 side, and the billet 32 and the die 33 are inserted into the container 10 (see FIG. 7). At this time, the shell pusher 23 is a container
Since it comes out of 10, the rotary actuator 31 retracts it to the lower retracted position B (see FIG. 8). Then, the crosshead 15 is moved forward to seal the opening of the container 10 with the seal block 14, and then the pressing force generation means 16
The container 10 and the crosshead 15 are integrally pushed toward the die stem 13 side to move forward, and are pushed toward the die stem 13 side to move forward to extrude the extruded material 34 by the die stem 13 ( (See Figure 9).

Next, the crosshead 15 is retracted, and the container 10 is slightly advanced (see FIG. 10).
Shirring of the discard 36 is carried out (see FIG. 11). Then, the container 10 is further advanced to take out the die 33 from the container 10, and the die ejector 20 removes the die 33, while the rotary actuator 31 turns the shell pusher 23 to the eject position A (see FIG. 12). At this time, since the support plate 26 is biased toward the stopper 29 by the spring 28, there is a predetermined gap a between the shell pusher 23 and the seal block 14, and the shell pusher 23 is
You can turn without interfering with 14. Next, when the container 10 is retracted toward the crosshead 15 side, the tip end 24 of the shell pusher 23 is fitted into the inside diameter of the container 10 and the shell is inserted.
After contacting the end of 25, the shell pusher 23 is pushed against the spring 28 and contacts the seal block 14. Therefore, when the container 10 is retracted to the initial retracted position, the shell 25 left on the inner wall of the container 10 is extruded by the tip end portion 24 of the shell pusher 23.
25 can be removed (see Figure 13).

By rotating and using the shell pusher 23 in this manner, a device for handling the shell pusher 23 is unnecessary, maintenance is easy, and the entire press can be downsized. Also, the use of hot work tool steel that can withstand high temperatures can be suppressed only in the seal block 14, and sufficient durability can be obtained even if relatively inexpensive CrMo steel is used for the shell pusher 23, resulting in a long service life. Can be achieved. Further, since the shell 25 can be removed by the shell pusher 23 when the container 10 is retracted, there is no wasteful operation, idle time can be shortened, and productivity is improved. The idle time can be shortened by inserting the billet 32 and the die 33 at the same time in FIG.

The means for moving the shell pusher 23 between the eject position A and the retracted position B is the turning axis of the crosshead 15.
It is desirable because the structure for turning by 30 can be mechanically simple, but it is not limited to this. For example, an arm type mechanism may be used, and the mechanism may be rocked by a cylinder.

(Effect of the Invention) According to the present invention, the tip portion 24 having a diameter substantially the same as the inner diameter of the container 10 is provided.
And a shell pusher 23 longer than the length of the container 10 in the longitudinal direction is detachably mounted on the surface of the forward seal block 14 on the side opposite to the crosshead, and the shell pusher 23 is inserted from the other opening of the container 10. By doing so, the shell 25 adhering to the inner wall of the container 10 is discharged from one opening of the container 10, so that the shell 25 on the inner wall of the container 10 can be quickly removed, the productivity is improved, and the billet temperature is increased. Despite being used for high-quality copper or copper alloy, it has the advantages of improved durability and longevity.

[Brief description of drawings]

FIG. 1 is a partial sectional plan view showing an embodiment of the present invention, and FIG.
The figure is a sectional side view of the same portion, FIG. 3 is a front sectional view of the pusher supporting portion, FIG. 4 is an enlarged view of the pusher portion, FIGS. 5 to 13 are operation explanatory diagrams, and FIG. 14 to FIG. FIG. 18 is an operation explanatory diagram of the conventional example. 10 ... Container, 13 ... Distem, 14 ... Seal block,
15 ... Crosshead, 16 ... Press force generating means, 23 ... Shell pusher, 24 ... Tip part, 25 ... Shell, 31 ... Rotation actuator.

Claims (1)

[Claims] 1. A billet (32) made of copper or a copper alloy.
A cylindrical container (10) holding the inside of the container (10), a die stem (13) that can be inserted from one opening of the container (10), and the other opening of the container (10). And a seal block (14) for sealing the opening,
Crosshead (15) holding the seal block (14)
And a pressing force amount generating means (16) arranged on the side opposite to the container of the cross head (15), and the pressing force amount in a state where the other opening of the container (10) is sealed by the seal block (14). The crosshead (15) and the container (10) are integrally pressed against the die stem (13) by the generating means (16), so that the copper or copper alloy arranged in the container (10) is removed from the die stem (13). ) In the indirect extrusion press for copper or copper alloy, the shell pusher (23) having a tip portion (24) having substantially the same diameter as the inner diameter of the container (10) and longer than the longitudinal length of the container (10) is provided. , The surface of the seal block (14) on the side opposite to the crosshead is detachable, and the shell pusher (23) is attached to the inner wall of the container (10) by inserting it from the other opening of the container (10). Shi The indirect extrusion press for copper or copper alloy, characterized in that the tool (25) is discharged from one opening of the container (10).