JPH07100170B2 - Dummy block removal device for extrusion press - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an extrusion press device, and more particularly to a dummy block take-out device for an extrusion press device designed to shorten idle time between pressing steps.

[Prior Art] FIG. 5 is a side view of a conventional dummy block removing device. When the extrusion press is used to perform extrusion press, the billet on the billet loader is loaded into the container by the stem of the ram while the container is pressed against the die. (In addition, normally, a fixed dummy block is attached to the stem, but there is also a case where a dummy block is interposed between the stem and the billet.) Then, the ram is further advanced to strongly press the billet with the stem, A billet is extruded from a die as an extruded product having a predetermined shape.

After pushing out the billet, the container is slightly retracted by the container cylinder, and the ram is retracted from the position where the dummy block is out of the container.

Next, the dummy block removing device is operated to remove the dummy block from the discard. In this case, the dummy block take-out device is installed on the outside of the extrusion press main body and has a structure having, for example, a link mechanism, a dummy block clamp portion is provided at the tip of the main body rod, and a central block region of the main body rod is provided. Two support rods are arranged in parallel to each other in a direction intersecting with the main body rod, with both ends thereof rotatably supported. Further, an air cylinder is provided on the side of the support rod, and in order to move the dummy block clamp part in a freely movable manner, the tip end of the piston rod engaged with the cylinder and the support rod are rotatably supported. Yes, by supplying a working fluid to the piston head side of the cylinder or the piston head side, after clamping the dummy block attached to the other end of the discard, the blade of the cutting device provided above the end platen The dummy block knockers attached adjacent to each other are lowered together with the lowering of the cutting blade, and the dummy block and the discard are separated by hitting the dummy block downward. After this separation, the dummy block take-out device is retracted and is conveyed to the position of the dummy block receiver.

Next, the cutting blade of the cutting device is fed between the container and the die to separate the remaining billet (referred to as discard) on the front surface of the die.

After that, the ram is retracted, the stem is extracted from the container, the next billet is inserted into the container, and the extrusion press operation of the next cycle is performed.

[Problems to be Solved by the Invention] The conventional device has the following problems.

That is, when the dummy block is clamped by the dummy block clamp section of the dummy block ejecting device and then the cutting blade is lowered to cut the discard, the dummy block is attached adjacent to the cutting blade provided at the lower end of the cutting device. The dummy block knocker knocks downward to separate the discard block from the dummy block.Next, after supplying the working fluid to the piston rod side of the cylinder, move the dummy block clamp part to move the dummy block from the front part of the die. Since it is transported to the position of the dummy block receiving stand, the idle time becomes long, and when installing the base part, a large dummy block unloading device installation space is required on the machine side of the extrusion press body. It was.

[Means for Solving the Problem] In order to solve such a problem in the present invention, there is provided an extrusion press device for removing a dummy block attached to a discard between the end platen and the container where extrusion of the billet is completed. In the dummy block take-out device, a clamp frame for taking out the dummy block is provided at a position adjacent to the container side of the die slide so as to be able to move forward and backward in a direction orthogonal to the extrusion center position of the billet, with respect to the receiving portion of the dummy block. Thus, a claw is rotatably provided on the entrance side of the dummy block receiving portion so that the dummy block can be allowed to enter and exit and regulated.

[Operation] The billet loaded in the container is strongly pressed by the stem, and the billet is extruded from the die as an extruded product having a predetermined shape. After the billet is pushed out, the container is slightly retracted, and the working fluid is introduced into the clamp cylinder to tilt the clamp claws in order to operate the dummy block ejector, then the working fluid is transferred to the dummy block receiver cylinder. Is introduced to advance the clamp part, and the clamp part is stopped at the limit of advancement where the clamp claw has passed the dummy block. Then, the working fluid is introduced into the clamping cylinder, the clamp claw is inverted, and the dummy block is clamped. In this state, the dummy block receiver cylinder is retracted to the retracted limit, the clamp is released, and the dummy block is discharged to the dummy block receiving table.

Since the dummy block take-out device according to the present invention makes a straight track by forward and backward movement, the dead time cycle is greatly shortened.

[Embodiment] FIGS. 1 to 4 are longitudinal sectional views taken along the extrusion direction near the end platen of an extrusion press apparatus according to an embodiment of the present invention, and FIG. 2 is a sectional view taken along line II-II of FIG. 3 is a sectional view taken along the line III-III in FIG. 1, FIG. 4 is a vertical sectional view of the dummy block take-out device, and FIG. 4 (a) shows the case where the dummy block has one clamping cylinder. FIG. 4B shows a case where the dummy block has three clamping cylinders.

In this embodiment, the billet loader, the stem, the extrusion cylinder (pressing device), etc. are not shown.

The dummy block take-out device 50 of this embodiment is similar to the conventional one.
It is arranged between the die 24 and the container 40 and has a role of taking out the dummy block 43 attached to the discard 42.

In FIG. 1, reference numeral 10 is a machine base, one end side of which is fixedly provided with an end platen 12 and the other end side of which is provided with a ram cylinder mounting block (not shown), and the extrusion cylinder is secured to the ram cylinder mounting block. It is set up.

The end platen 12 has a guide rail supporting portion 18 projecting from a lower portion on the side facing the extrusion cylinder, and a guide rail 20 is provided on the guide rail supporting portion 18 in a horizontal direction (hereinafter referred to as the extrusion direction) orthogonal to the extrusion direction. The horizontal direction, which is perpendicular to the machine width, is sometimes referred to as the machine width direction.).

A die slide 22 is installed on the guide rail 20 so as to be slidable in the machine width direction, and the guide rail 20 and the concave ridges 20a and the convex ridges 22a provided on the die slide 22 are engaged with each other to form the die slide. It guides the movement of 22 machines in the width direction. As shown in FIG. 3, the die slide 22 is provided with a die mounting portion 22b having a U-shape when viewed from the extrusion cylinder side, and the die 24 is inserted into the die mounting portion 22b from above so that the die 24 can be inserted into the die mounting portion 22b. It is attached to the die slide 22.

In FIG. 1, a mounting block 26 is fixedly installed on the upper part of the end platen 12 facing the extrusion cylinder.
The attachment block 26 is provided with a cutting device 28. The cutting device 28 includes a discard 42 in a container 40 described later.
And for cutting the extruded product part,
Cutting blade 32 stroked vertically by cylinder 30
Is equipped with. The cylinder 30 is mounted on a cylinder mounting base 36 provided on the upper part of the pillar 33, and the piston rod 30a of the cylinder 30 can be stroked downward. A connecting block 3 is attached to the lower end of the piston rod 30a.
8 is provided, and the cutting blade 32 is attached to the lower end of a rod (not shown) fixed to the lower surface side of the connecting block 38.

A key member 42 is fixed to the lower surface of the mounting block 26, and an engaging portion 22c formed on the upper surface of the die slide 22 is slidably engaged with the key member 41. Both the key member 41 and the engaging portion 22c extend in the machine width direction. The die slide 22 is moved in the machine width direction by a cylinder 66 provided on the side of the end platen 12. Further, as shown in the drawing, it is possible to reciprocate between the extrusion operation position located on the back surface of the end platen 12 (the surface on the container 40 side) and the die replacement position pulled out from the back surface of the end platen 12.

A container guide (not shown) is provided on the end platen 12 side of the column 34, and a container having a billet loading hole 44 for holding a billet is movably in the extrusion direction along the container guide. 40 are equipped.

In the extrusion press device having the above-described structure, the dummy block take-out device 50 of this embodiment is used in FIGS.
It is arranged adjacent to a die 24 placed on the die slide 22 between the end platen 12 and the container 40 shown in the figure. The configuration of the dummy block extraction device 50 will be described with reference to FIG. The dummy block removal device 50 is
It is composed of a clamp frame 51, a clamp part 52, a dummy block receiver cylinder 53, and the like. Further, the clamp part 52 is composed of a clamp cylinder 52a, a piston rod 52b, a main lever 52c, a sub lever 52d and a clamp claw 57.

A piston rod 53a is provided in engagement with the dummy block receiver cylinder 53, and the tip end of the piston rod 53a and the rear end of the clamp frame 51 including the clamp part 52 are fixed to each other. Guides 54 for preventing deviation are arranged on both sides of the frame 51 along the width direction of the machine.

A support plate 55 is fixed to the substantially central portion of the clamp frame 51,
The clamp frame 51 is divided into a front portion and a rear portion with the support plate 55 as a boundary. Inside the front part of the clamp frame 51, a main part for clamping the dummy block 43, that is, a clamp part 52 and a dummy block contact part 58 are arranged. A main lever 52c is fixed to the tip of a piston rod 52b that is slidable forward and backward by engaging with the clamp cylinder 52a. The main lever 52c is attached to both ends of the main lever 52c along the clamp frame 51 and the sub-lever 52d. One end of the sub-lever 52d is rotatably supported by the support shaft 56a, and the other end of the sub-lever 52d is rotatably supported by the support shaft 56b with a clamp claw 57 for clamping the dummy block 43. ing.

Here, when the working fluid is introduced into the above-mentioned clamp cylinder 52a, the clamp claw 57 is rotatably supported about the support shaft 56c. The dummy block contact portion 58 has a semicircular shape so that the dummy block 43 having a circular shape can be easily gripped when the dummy block 43 is gripped.

The operation of the dummy block take-out device 50 thus configured will be described by incorporating it into the operation of the extrusion press device body.

First, during the extrusion of the previous cycle, the billet for the next cycle enters the billet loader. Next, the billet loader is raised to the center of the press. Then, the ram of the extrusion cylinder is advanced to advance the stem to load the billet into the billet loading hole 44 of the container 40. After the billet is thus loaded, the ram is further advanced and the billet is strongly pressed and pushed out from the die 24.

Dies container 40 after billet extrusion is complete
Move it away from 24. Where the container
The 40 is retracted so that the dummy block removing device shown in FIG. 1 can freely move in and out between the die 24 and the container 40.

Then, the dummy block ejecting device 50 is operated to eject the dummy block 43.
Assuming that 50 is now at the backward limit of the anti-die exchange position in the machine width direction, first, when the working fluid is introduced to the piston head side of the clamping cylinder 52a and the piston rod 52b is moved forward, the piston rod 52b The main lever 52c and the sub-lever 52d also move forward with the forward movement, and the clamp claw 57
Is tilted about the support shaft 56c to a position shown by a chain double-dashed line in FIGS. 4 (a) and 4 (b), and the tip of the clamp claw 57 is advanced even when the clamp portion 52 advances to the forward limit. Make sure that the part does not contact the dummy block 43. When the working fluid is introduced into the dummy block receiver cylinder 53 in this state, the clamp portion 52 starts moving from the backward limit to the forward limit in the machine width direction via the piston rod 53a. As the clamp part 52 moves forward, the dummy block 43 passes through the clamp claw 57 and stops the introduction of the working fluid into the dummy block receiver cylinder 53 at the time of contact with the dummy block contact part 58.

Next, when the working fluid is introduced into the piston head side of the clamping cylinder 52a, the clamp claw 57 assumes the state shown by the solid line in FIG. 4 (a), contrary to the operation described above. Then, the working fluid to the clamping cylinder 52a is adjusted to some extent to clamp the dummy block 43 with the clamp claw 57 and the dummy block contact portion 58. In this state, the working fluid is introduced into the piston head side of the dummy block receiver cylinder 53 to retract the clamp portion 52 from the clamp position A of the dummy block 43 to the position B where the dummy block receiver is arranged. When the dummy block 43 comes to the position B, the working fluid is introduced to the piston head side of the clamp cylinder 52a to move the clamp claw 57 to the position shown in FIG.
In the state shown by the solid line, the clamp is released and the dummy block 43 can be discharged to the dummy block receiving stand.

Next, the cylinder 30 of the cutting device 28 is operated and the cutting blade 32
The product and the discard 42 are cut off by lowering. After the cutting is completed, the cutting blade 32 is retracted by the cylinder 30 to the standby state shown in FIG. The ram is retracted to a predetermined standby position (a position where a billet for the next cycle can be supplied between the stem and the container 40), the container 40 is brought into close contact with the die 24, and the process proceeds to the next extrusion press step.

In the present embodiment, the clamping method has a shape having one clamping cylinder 52a and two clamping claws 57 as shown in FIG. 4 (a), but the present invention is not limited to this. A clamping method having a shape having three clamping cylinders 52a and two clamping claws 57 as shown in FIG. 4 (b) may be used.

[Effects of the Invention] As is clear from the above embodiments, according to the dummy block take-out device of the present invention, the dummy block can be separated from the discard by only the operation of the dummy block take-out device without using the cutting device. The movement track can be made straight until the dummy block is clamped and discharged to the dummy block receiving stand, and the moving stroke is also shortened, so the dead time cycle is greatly shortened and the operating rate is improved.

[Brief description of drawings]

1 to 4 are vertical sectional views along the extrusion direction near the end platen of the extrusion press apparatus according to the embodiment of the present invention, and FIG. 2 is a sectional view taken along the line II-II of FIG. 1, and FIG. Is a sectional view taken along the line III-III in FIG. 1, FIG. 4 is a vertical sectional view of the dummy block take-out device, and FIG. 4 (a) is a sectional view taken in the case of one dummy block clamping cylinder in FIG. ) Indicates the case where the dummy block has three clamping cylinders.
The figure shows a side view of a conventional dummy block removing device. 10 …… machine base, 12 …… end platen, 22 …… die slide, 24 …… die, 28 …… cutting device, 34 …… column, 40 …… container, 42 …… discard, 43 …… dummy block , 50 …… Dummy block ejector, 52 ……
Clamp part, 52a …… Clamp cylinder, 52c …… Main lever, 52d …… Sub lever, 53 …… Dummy block receiver cylinder, 57 …… Clamp claw.

Claims (1)

[Claims] 1. A dummy block take-out device of an extrusion press device for taking out a dummy block adhering to a discard, which is between an end platen and a container and has completed extrusion of a billet, and a clamp frame for taking out the dummy block is attached to a die slide. At a position adjacent to the container side,
It is provided so as to be able to advance and retreat in a direction orthogonal to the center of extrusion of the billet, and a claw is provided on the inlet side of the dummy block receiving part so that the dummy block receiving part can be allowed to enter and exit from the dummy block receiving part. A dummy block take-out device of an extrusion press device, which is rotatably provided.