JP6717142B2 - Extrusion press - Google Patents

Description

The present invention relates to an extrusion press for extruding a billet of ferrous metal or non-ferrous metal from a die to form a shape or the like.

Generally, when a billet made of a metal material such as aluminum or its alloy material is extruded by an extrusion press device, an extrusion stem is attached to the tip of a main ram driven by a hydraulic cylinder, and a container is pressed against a die. Then, store the billet in the container with an extrusion stem. Then, the billet is pressed by the extrusion stem by further moving the main ram forward by driving the hydraulic cylinder. Then, the molded product is extruded from the outlet of the die. Such a device is called an extrusion press.

When metal is extruded by an extrusion press using a die, the contact surface between the die and the container deteriorates due to aging, and the resulting lack of sealing force of the container against the end face of the die causes the extruded metal to come out of the die and the container during extrusion. It may protrude as a burr between the contact surfaces of. This is called the Hanasaki phenomenon.
Once Hanasaki occurs, a small gap is created on the contact surface between the die and the container, or the contact surface between the die and the container is tilted, causing the flower to grow even larger, and finally, extrusion cannot continue. is there.
Therefore, once a flower blooms, it must be removed promptly. Conventionally, it is a work to remove the flower bloom by human hands by retracting the container, turning off the power of the extrusion press and intruding into the extrusion press machine in a safe state and using a hammer drill etc. Was there.

JP 2006-68750 A

In a metal extrusion press drive device, when flowers bloom from the container seal surface during extrusion and flower bloom adheres to the container seal surface, the container is currently retracted (opened) to allow a person to enter the extrusion press machine. Using a hammer drill, etc., it was a work to remove the flower bloom by hand.
This work was a so-called 3K work that is dangerous and dirty.

In the prior art document, in a drive device of a metal extrusion press, when a flower blooms from a container during extrusion, the flower bloom adhering to the die side can be replaced with another container and lowered into the discarder to take a flower bloom. This is possible even with a conventional press without using a shear knife as in the prior art.
Hanasaki from the container seal surface is different when adhering to the dice side and when adhering to the container side.With the shear knife of the prior document, it is not possible to accurately position the container backward, so the flower bloom when adhering to the container end surface side. It was difficult to cut and remove.

A die stack for holding the die, a die cassette for holding the die stack, and a die slide device for moving the die cassette for exchanging the die,
In the extrusion press where Hanasaki, which is a burr, occurs on the container sealing surface between the container and the die during extrusion molding.
The Hanasaki removal block equipped with a shear blade was exchanged with the die stack and held in the die cassette, and the Hanasaki was removed by moving the die cassette with a die slide device.

A stopper with a built-in spring was attached to the Hanasaki removal block.

After the Hanasaki removal, the Hanasaki removal block is replaced with the die stack by the die cassette, so it can be replaced with one touch.

The drive device of the die slide device is any one of a hydraulic cylinder, an air cylinder, and a combination of a ball screw and a motor.

With the dice changing device, the Hanasaki removal block can be replaced with a die, and the container can be moved forward to the Hanasaki removal block to position the container and move it to the extrusion press operating side of the die slide. It can be carried out.
Furthermore, the flower bloom removal time can be shortened, the so-called 3K work that is dangerous and dirty can be eliminated, and the productivity of the extrusion press and the safety and health can be improved.

It is the whole outline figure of the extrusion press of the present invention. It is the figure which looked at the flower bloom removal block of the present invention from the upper part of a container. It is the figure which looked at the flower bloom removal block and die slide device of the present invention from the upper part of a container.

An embodiment of an apparatus for exchanging a die of an extrusion press according to the present invention will be described in detail below with reference to the drawings, taking aluminum as an example of a ferrous metal or a non-ferrous metal.

First, the outline of the extrusion press of the present invention will be described with reference to FIG.
As shown in FIG. 1, in an extrusion press used in the present invention, an end platen 1 and a main cylinder 2 are arranged to face each other, and both are connected by a plurality of tie rods 3. A container 5 is arranged on the inner surface of the end platen 1 with a die 4 having an extrusion hole formed therebetween, and a billet 6 is loaded in the container 5 and is extruded and pressurized toward the die 4 to form a die hole. An extruded material having a corresponding cross section is extruded.

The main cylinder 2 that generates the pushing force has a built-in main ram 9, which can be pressurized and moved toward the container 5. At the front end of the main ram 9, the extrusion stem 7 is brought into close contact with a dummy block (not shown) at its tip so that it is arranged concentrically with the billet loading hole of the container 5, and the main crosshead is projected toward the container 5. It is attached through 8. Therefore, when the main cylinder 2 is driven to move the main crosshead 8 forward, the extrusion stem 7 is inserted into the billet loading hole of the container 5, and the rear end face of the loaded billet 6 is pressed to extrude the extruded material. is there.

A plurality of side cylinders 10 are attached to the main cylinder 2 in parallel with the axis of extrusion, and the cylinder rods 11 thereof are connected to the main crosshead 8. As a result, as a preparatory step for the extrusion step, the extrusion stem 7 is initially moved to a position close to the container 5, and the extrusion pressurizing operation is performed using both the main cylinder 2 and the side cylinder 10. Here, when there is a flower bloom phenomenon from the container sealing surface during extrusion, the extrusion press is stopped and the die in use is replaced by the flower slide removal block 21 by the die slide device 30. At that time, the flower bloom removing block 21 is put in another die cassette in advance.

FIG. 2 is a view of the container 5 and the die cassette 14 as seen from above.
The flower bloom removal block 21 is held in the die cassette 14. On the other hand, Hanasaki 31 is formed on the end surface of the container liner 15 held in the container 5. The metal Hanasaki 31 has good adhesion to the container liner 15 and sticks strongly.
A shear blade 22 is attached to the Hanasaki removal block 21. The shear blade 22 has an acute angle in the traveling direction, and the Hanasaki 31 is easily scraped off. A container supporting block 23 is provided on the opposite side of the shear blade 22 so that the shear blade 22 is parallel to the end surface of the container liner 15.

The method of removing the flower bloom 31 using the flower bloom removing block 21 of the present invention is performed by the hydraulic cylinder of the die slide device 30 in the die cassette 14 where the flower bloom 31 of the container 5 is deposited on the container liner 15, that is, the center of the extrusion press. Move to. Therefore, the container 5 is advanced to bring the container 5 into contact with the flower bloom removal block 21.
At this time, the container end face is held by the end face of the shear blade 22 of the Hanasaki removal block 21 and the contact face of the container support block 23, and is arranged parallel to the end face of the container liner 15 and the shear blade 22 of the Hanasaki block 21.
Here, when the container 5 is moved forward, the spring block 26 is provided on the abutment surface of the flower bloom removal block 21 via the spring, so the spring (disc spring) 24 is compressed and moved, and the container end surface has a shear blade. The end face of 22 contacts the end face of the container support block 23.
Next, the container forward command is stopped. At this time, the container position is returned in the retracting direction (opening) by the spring force compressed previously, and a slight gap is formed between the shear blade end face and the container end face.
In this state, the Hanasaki removal block 21 is moved to the operation side by the die slide device 30, and the Hanasaki attached to the end surface of the container liner is cut by the shear blade 22.
Normally, the Hanasaki 31 is removed once, but if it is not completely removed, the Hanasaki block 21 is returned to its original position by the die slide device 30, and the same operation is repeated once again. Hanasaki 31 can be completely removed from the end surface of the container liner 15 by performing the process a plurality of times.
The above operation is usually performed by manual operation of the extrusion press.

The Hanasaki removal block 21 can be held in the die cassette 14 with one touch without using bolts, but a key for detent (not shown) is used. The block 21 does not rotate, and the die cassette 14 is held by the guide, so that it does not move up and down.

The die slide device 30 may be a hydraulic cylinder, an air cylinder, or a motor, or may be used in combination.

A spring (disc spring) 24 is built in the shear blade 22 and the container support block 23 of the Hanasaki removal block 21 so that the spring block 26 always exerts an acting force in the backward direction on the container 5.

The built-in stopper is composed of a spring block 26, a spring (disc spring) 24, and a bolt 25 as shown in detail in the B section. The spring (disc spring) 24 exerts a force such that it is pushed out to the spring block 26. This force and the pushing force of the container are balanced, and a gap of 1 mm or less is adjusted between the container support block 23 and the container 5.
Since this construction is similar to the built-in stopper of the shear 22, a gap of 1 mm or less is left between the shear blade 22 and the container 5.
Due to this gap, when the shear blade 22 is moved to the operating side of the extrusion press, the container and the shear blade 22 do not rub against each other, the friction force does not work, and the shear blade 22 moves smoothly horizontally. become able to.

This is a die slide device 30 which is usually used when replacing the die 4. If this is used, the die 4 can be immediately moved to the outside of the machine. In the case of this figure, a hydraulic cylinder is used, but this may be an air cylinder, a combination of a ball screw and a motor, or a combination of a rack and pinion and a motor. Furthermore, since it is held by the die cassette 14 in the Hanasaki block 21 from the used die to the new die 4 or when there is a Hanasaki phenomenon, it can be replaced with one touch.

The Hanasaki removal block 21 that has been carried out of the extrusion press can be replaced with a new die 4 by one-touch by a die-only hoist crane (not shown) or a die automatic transfer facility.

Since the present invention is configured as described above, the following effects can be obtained.
The flower exchange block can be replaced with a die using the die changing device, the container can be moved forward to the flower removal block for positioning, and can be moved to the extrusion press operating side of the die slide to remove the flower blossom cleanly and accurately. It can be carried out.
Further, the flower bloom removal time is shortened, the so-called 3K work that is dangerous and becomes dirty, is eliminated, and the productivity of the extrusion press and the safety and health are improved.

1 End Platen 2 Main Cylinder 3 Tie Rod 4 Die 5 Container 6 Billet 7 Extrusion Stem 8 Main Cross Head 9 Main Ram 10 Side Cylinder 11 Side Cylinder Rod 12 Container Holder 14 Die Cassette 1 4 B Die Cassette B
15 Container Liner 21 Hanasaki Removal Block 22 Shear Blade 23 Container Support Block 24 Spring (Disc Spring)
25 bolts 26 spring block 30 die slide device 31 Hanasaki

Claims (3)

Comprising a die stack for holding the die, the die cassette for holding the die stack, the die slide device for moving the die cassette in order to replace the dies,
In the extrusion press is a burr Hanasaki occurs the container sealing surface between the container and the die during extrusion,
The die cassette, comprising a shear blade, hold the Hanasaki removal block with a spring-loaded stopper was replaced with the die stack, by moving the die cassette in the die slide device, removing the Hanasaki An extrusion press characterized in that. Extrusion press according to claim 1 after it said Hanasaku removed from the Hanasaki removal block, exchange into the die stack, wherein the replaceable one-touch since it is held by the die cassette. The extrusion press according to claim 1, wherein a driving device of the die slide device is any one of a hydraulic cylinder, an air cylinder, and a combination of a ball screw and a motor.

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