JP6897364B2 - Extrusion press shear device - Google Patents

Description

The present invention is an extrusion press for extrusion molding of metals such as aluminum alloys, in which the container is separated from the die after extrusion molding, and the discard, which is the rest of the billet, is cut at the front surface of the die and separated from the extrusion product part. Regarding shear equipment.

In a conventional extrusion press chassis device, a chassis cylinder for cutting a discard card is attached downward to a frame provided on the container side above the end platen holding the die, and the piston rod of the shear cylinder. A chassis blade is provided at the lower end via a shear slide.

In a conventional shear device, a hydraulic cylinder, a frame, a shear slide, and a shear blade are connected in series. Furthermore, when the die and the container were combined, the shear blade had to escape upward so as not to hit the container. As described above, since the hydraulic cylinder, the frame, the shear slide, and the shear blade are connected in series, the height of the shear device is considerably high when the length of the cylinder rod is included.

Special Table 2014-534904

The conventional extrusion press has the following problems.
In the conventional extrusion press shear device, it is necessary to be high in order to avoid the container holder due to the rising limit of the shear device, and therefore the stroke of the hydraulic cylinder is required to be long, so that each of the hydraulic cylinder, shear slide, etc. The length of the part was long.
Therefore, the height of the entire shear device becomes high, and it is necessary to raise the height of the building and the like.

In an extrusion press shear device that separates the container from the die after extrusion molding and cuts the discard, which is the extrusion residue of the billet, at the end face of the die to separate it from the extrusion product section.
The shear device of the extrusion press includes a shear slide, and the shear slide is formed in two parts at the shear slide root portion and the shear slide tip portion, and the shear slide root portion and the shear slide tip portion are tiltably connected via a shaft. Has been
The base of the shear slide slides up and down on the inner surface of the shear guide, and the tip of the shear slide holds a shear knife to cut the discard.
It was decided that the tip of the shear slide was tilted downward when cutting the discard, and tilted toward the die when the tip of the shear slide was at the ascending limit.

It is equipped with a knocker that pushes down the discard attached to the shear knife after cutting the discard, and the knocker is composed of a knocker base, a knocker tip, and an actuator. I decided to incline together with.

It was decided that the drive device provided on the shear guide presses the tip of the shear slide so as to tilt toward the die side with the axis as the center at the ascending limit of the shear slide.

With the elastic body provided on the shear slide, the tip of the shear slide is aligned with the root of the shear slide and the tip of the shear slide around the axis in the longitudinal direction so as to face downward.

At the ascending limit of the shear slide, shear knife lubrication was sprayed onto the spray device during extrusion and a cover was provided directly above the die to prevent dripping from reaching the container and die.

Since the shear stroke is significantly shorter than before, the height of the shear device from the ground can be kept low. Therefore, the height of the building for installing the extrusion press can be kept low at the same time.

Since the shear stroke is significantly shorter than before, the shear operation time can be kept short. Therefore, the idle time of the extrusion press can be shortened, and the productivity of the extrusion press is increased.

It is an overall view of the shear device of this invention. It is an overall view of a conventional shear device. It is an overall view of the shear slide tip portion of this invention. FIG. 3 is a cross-sectional view taken along the line AA of FIG. It is a side view of the shear slide tip portion of this invention, and is the view seen from the direction of B.

An embodiment of the shear device according to the present invention will be described in detail below with reference to the drawings.

Embodiments of the present invention will be described with reference to FIGS. 1 to 5. In FIG. 1, 21 is an end platen, 23 is a die, 25 is a die slide, 27 is a guide member that guides the movement of the die slide 25 in a horizontal direction perpendicular to the extrusion direction of the extrusion press, and 24 is a support for the guide member 27. The member 26 is a block that receives the pressing force from the die 12. A hole is provided in the center of the end platen 21 and the block 26 through which the product extruded from the die 23 passes.

As shown in the figure, the die 23 is composed of a plurality of known parts. Then, the die 23 is placed on the die slide 25, and the movement in the stem direction is restricted by the metal fitting 28 formed in a horseshoe shape. Reference numeral 22 is composed of a container liner, a container body, a container holder, and the like.
A shear device 10 is attached to the upper part of the end platen 21 holding the die 23 on the front side on the container side.

In the chassis device 10, 15 is a shear cylinder, and 17 is a piston rod. The fixed frame 16 attached to the upper surface of the die 23 of the end platen 21 is a shear cylinder. A clevis 41 and a clevis pin 42 were attached to the tip of the piston rod 17, and the clevis 41 and the clevis pin 42 were arranged at the center of the upper end of the shear slide 13.
A shear blade 11 is attached to the lower end of the shear slide 13 to cut and separate the discard and the product (not shown) downward.

The shear device of the present invention is shown in FIG. In the present invention, the shear slide tip portion 12 to which the shear blade 11 is attached is rotatable around a first shaft 38 connected to the shear slide 13.
Normally, the shear device 10 stands by on the container holder 22. After the extrusion is complete, it descends into the cabin to cut the discard.
In the conventional chassis device 10, the shear slide tip portion 12 is in a straight line with the shear slide 13 at the standby position of the shear device 10. Therefore, in order to let the shear blade 11 escape to the upper part of the container holder 22, Since the shear blade 11 has a long distance from the standby position to the cutting position of the discard, the stroke of the shear cylinder 16 needs to be long, and the shear cylinder 16 is long. The height of the entire shear device 10 was very high.
In the present invention, when the shear device 10 is in the standby position, the shear slide tip portion 12 to which the shear blade 11 is attached rotates around the first shaft 36 and is surrounded by the container holder 22, the end platen 21, and the die 23. I tried to fit in the space.
As a result, the distance between the shear blade 11 and the discard is shortened, the length of the shear cylinder 16 is shortened, the position of the shear slide 13 is lowered, and the height of the entire shear device 10 is lowered.

FIG. 3 shows the details of the shear slide tip portion 12. It is a figure when the shear slide tip portion 12 is tilted. The actuator 31 is fixed to the shear slide 13 inside the shear guide 14. This actuator is provided for the operation of the knocker. The piston rod 32 of the knocker hydraulic cylinder is connected to the knocker 33 via the first shaft 38.
When the tip of the shear slide is aligned with the shear slide 13, the piston rod 32 and the knocker 33 are aligned, and by driving the actuator 31, the function as a knocker works, and the knocker 33 adheres to the shear blade. The discard will be pushed down.
The shear slide root portion refers to a range in the vicinity of the shear slide 13 connected to the shear slide tip portion 12.
The actuator 31 is preferably a hydraulic cylinder, an air cylinder, or the like.

In FIG. 3, the shear slide tip portion 12 is tilted because the upper portion of the shear slide tip portion 12 is pushed by the pressing component 45 by the drive device 35 rotatably attached to the shear guide 14 by the pin 46 and tilted. .. The pressing drive device is driven only in the pressing direction. As a result, the drive device 35 can be maintained in a state of being fixed to the shear slide 14 even when the discard is cut by the shear, so that the drive device 35 can be configured without interfering with the knocker actuator 31. The drive device 35 may be a hydraulic cylinder, an air cylinder, a motor, a rack and pinion, a ball screw, or the like.

FIG. 4 shows a cross-sectional view taken along the line AA in FIG. Two of the second shafts 36 connect the shear slide 13 and the shear slide tip portion 12. That is, the shear slide tip portion 12 is tilted around the second shaft 36.
Further, the first shaft 38 rotatably connects the piston rod 32 and the knocker 33. That is, the piston rod 32 and the knocker 33 are tilted around the first shaft 38. By driving the actuator 31 when the piston rod 32 and the knocker 33 are aligned with each other, the knocker 33 is lowered downward and the discard is pushed down. A bush 39 is attached to the sliding portion of the knocker 33 so that the knocker 33 and the piston rod 32 can easily slide.

FIG. 5B of FIG. 5 shows a diagram of the elastic body 41 used for returning the shear slide tip portion 12 from the tilted position to the position in line with the shear slide 13. As described above, since the driving device 35 that tilts the shear slide tip portion 12 has only a function of tilting, an elastic body 41 for returning to the original position is required. The elastic body 41 is attached to the shear slide 13 and the shear slide tip portion 12. The elastic body 41 is preferably something like a spring.

Since the present invention has the above configuration, the following effects can be obtained.
Since the shear stroke is significantly shorter than before, the height of the shear device from the ground can be kept low. Therefore, the height of the building for installing the extrusion press can be kept low at the same time.

Further, since the shear stroke is remarkably short as compared with the conventional case, the shear operation time can be suppressed to be short. Therefore, the idle time of the extrusion press can be shortened, and the productivity of the extrusion press is increased.

11 Chassis blade 12 Chassis tip 13 Chassis slide 14 Chassis guide 15 Fixed frame 16 Chassis cylinder 17 Piston rod 21 End platen 22 Container holder 23 Die 25 Die slide 27 Guide member 31 Actuator 32 Piston rod 33 Knocker 35 Drive device 36 Second Axis 38 1st Axis 39 Bush 41 Elastic Body

Claims (4)

In an extrusion press shear device that separates the container from the die after extrusion molding and cuts the discard, which is the extrusion residue of the billet, at the end face of the die to separate it from the extrusion product section.
The shear device of the extrusion press includes a shear slide, and the shear slide is formed in two parts at the shear slide root portion and the shear slide tip portion, and the shear slide root portion and the shear slide tip portion are tiltably connected via a shaft. Has been
The base of the shear slide slides up and down on the inner surface of the shear guide, and the tip of the shear slide holds a shear knife to cut the discard.
An extrusion press shear device characterized in that the tip of the shear slide faces downward when cutting a discard, and the tip of the shear slide tilts toward the die when the upper limit of the shear slide is raised. It is equipped with a knocker that pushes down the discard attached to the shear knife after cutting the discard, and the knocker is composed of a knocker base, a knocker tip, and an actuator. The shear device for an extrusion press according to claim 1, wherein the shear device is tilted in combination with the above. Claim 1 or claim 2 is characterized in that the drive device provided on the shear guide presses the tip of the shear slide so as to tilt toward the die side with respect to the axis at the ascending limit of the shear slide. The shear device for the extrusion press described in. According to claim 1, the elastic body provided on the shear slide is provided so that the shear slide root portion and the shear slide tip portion are aligned in the longitudinal direction with the axis as the center and face downward. The shear device for an extrusion press according to claim 3.

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