JPS6340282Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a press material trimming device, and more particularly to a trimming device that is equipped with a mechanism that automatically removes scraps generated during trimming from positioning pins.

A plate material such as a metal plate that has been drawn by press working is often then trimmed at the side in order to finish it into a predetermined product shape. Generally, this trimming is performed by positioning and placing the pressed material on the lower die, then lowering the upper die from above, and sliding the edges of the lower die and the upper die (at least one of which is the blade surface). It is done by moving. When such trimming is performed, the portion outside the product shape outline is separated from the product supported by the lower die and is dropped downward as scrap. (For example, see Japanese Patent Application Laid-Open No. 57-202933.) However, when performing the above trimming, generally the press material is placed on the lower die in an accurate predetermined posture, so the end portion of the press material that will be scrapped after trimming is Since several positioning holes are drilled and positioning pins are inserted into the positioning holes from below, the scrap in the portion having the positioning holes remains attached to the positioning pins. If left in this state, it would naturally interfere with the next trimming process, so conventionally, workers had to manually remove the scraps that were caught on the positioning pins.

Since manual work as described above naturally reduces the efficiency of trimming work, we also proposed a trimming device in which the positioning pin is connected to a cylinder device, and the cylinder device is driven in the direction to pull out the positioning pin from the scrap after trimming is completed. However, such a device has an extremely complicated structure because it is provided with a cylinder device and a control device for interlocking the cylinder device with the trimming operation at a predetermined timing.

The present invention was devised in view of the above circumstances, and its purpose is to provide a press material trimming device that has a simple structure and can automatically remove the scrap in the portion where the positioning hole is provided from the positioning pin. That is.

The trimming device for pressed materials of the present invention is a trimming device for pressed materials as described above, that is, a trimming device for pressed materials that positions and places the pressed material on the lower mold and then lowers the upper mold to trim the pressed material. A pin support member that is vertically movably supported on the side and urged upward by an elastic member, and a positioning hole that is fixed upward to the top of this pin support member and that is drilled in the end of the press material. a locating pin that fits into the locating pin to position the press material; a push-down block that is attached to the upper die and presses the pin support member to pull the locating pin downward from the locating hole when the upper die is lowered; The present invention is characterized in that it is provided with a scrap dodging table in which a possible hole is formed and an upper surface is formed that slopes downward as the distance from the lower mold increases.

Hereinafter, the present invention will be explained in detail based on embodiments shown in the drawings.

FIG. 1 shows an example of a pressed material that is trimmed by the trimming device of the present invention. Since the press material 1 is drawn in the center by press working, the peripheral portion of the press material 1 is drawn in and out, resulting in a disordered shape. Therefore, the overall size of the press material 1 is the product shape outline A shown by the imaginary line in the figure.
The press material 1 is formed in advance to be larger than the product shape, and after pressing, the press material 1 is trimmed according to the product shape outline A. After this trimming, the end portion 1a outside the product shape outline A becomes unnecessary scrap, but a plurality of positioning holes 1b are generally drilled in this portion after press working. In the pressed material 1 shown in FIG. 1, the scrap is annular, so in order to easily remove the scrap after trimming, the end portion 1 of the pressed material 1 is
At the same time as trimming, make cuts 1c in several places in a.
(indicated by a broken line in the figure) is inserted.

FIG. 2 shows a trimming device according to an embodiment of the present invention, which trims the press material 1 as described above. The trimming device includes a trimming lower die 2 having a planar shape according to the product shape outline A and an outer edge portion 2a serving as a blade surface, and a trimming device that cuts the entire circumference of the trimming lower die 2 with respect to the edge portion 2a of the trimming lower die 2. The edge portion 3a has an inner edge portion 3a that aligns with the inner edge portion 3a.
It has an upper trimming die 3 having a blade surface, and a plate holder 4 that can be pressed against the upper surface of the lower trimming die 2.

A support stand 5 is installed on a part of the side of the lower mold 2 for trimming.
is fixed, and a pin support member 6 is supported in a support hole 5a extending vertically in the support base 5 so as to be slidable in the vertical direction. This pin support member 6
A coil spring 7 is attached to the bottom of the pin support member 6, and the pin support member 6 is urged upward by the coil spring 7. Further, a positioning pin 8 is provided on the upper part of the support member 6.
is fixed facing upward.

A scrap dodging stand 9 is fixed to the support stand 5 at a position close to the lower trimming mold 2. This scrap dodging stand 9 is provided with a pin hole 9a through which the positioning pin 8 can loosely pass.
Further, the upper surface 9b is an inclined surface that descends as it moves outward from the lower trimming mold 2. A push-down block 10 is fixed to the lower surface of the trimming upper mold 3 at a position where it can come into contact with the upper surface of the pin support member 6.

The operation of the apparatus having the above configuration will be explained below. Before the trimming operation, the upper trimming mold 3 is pulled up to a position where its edge portion 3a is far away upward from the edge portion 2a of the lower trimming mold 2. Therefore, at this time, the push-down block 10 is separated from the upper surface of the pin support member 6, and the push-down block 10 is separated from the upper surface of the pin support member 6
is biased by the coil spring 7, and rises to a position where the positioning pin 8 is set at the height shown by the imaginary line in FIG. Here press material 1 is placed on lower mold 2 for trimming.
is placed. The positioning pin 8, pin support member 6, and scrap dodging stand 9 as shown in FIG.
Each positioning pin 8 is provided corresponding to each of the plurality of positioning holes 1b of the press material 1.
is fitted into each positioning hole 1b. By doing this, the press material 1 is attached to the trimming lower die 2.
It is positioned and placed on top in a predetermined posture (the position of the press material end 1a at this time is shown by a virtual line in the figure).

From this state, the plate holder 4 and the trimming upper die 3 are lowered, but the plate holder 4 comes into contact with the press material 1 earlier than the trimming upper die 3, and the press material 1
It will be lowered at the timing of pressing and fixing. When the trimming upper mold 3 is lowered, the push-down block 10 fixed to the lower surface of the trimming mold 3 is first pressed against the pin support member 6.
abuts against the upper surface of the pin support member 6 and presses down the pin support member 6;
The positioning pin 8 is pulled out downward from the positioning hole 1b of the press material 1 which has already been fixed onto the trimming lower die 2 by the plate holder 4. When the upper trimming die 3 is further lowered, the positioning pin 8 is recessed into the pin hole 9a of the scrap dodging table 9, and the edge portion 3a of the upper trimming die 3 is aligned with the edge portion 2a of the lower trimming die 2. As the press material 1 slides, the end portion 1a of the press material 1 is cut and the press material is trimmed into a desired shape. The cut end portion 1a of the press material becomes scrap, and this scrap 1a falls onto the inclined upper surface 9b of the scrap dodging table 9 into which the positioning pin 8 is recessed. Since the upper surface 9b is an inclined surface, the scrap 1a slides outward (in the direction away from the lower trimming mold 2), and the positioning hole 1b, which was previously aligned with the positioning pin 8, is moved away from the positioning pin 8. It also shifts outward.

When trimming is completed in this way and the trimming upper die 3 is then pulled upward, the pin support member 6 biased by the coil spring 7 rises, and the positioning pin 8 is placed on the upper surface of the scrap dodging table 9. It protrudes upward from 9b. Then, as mentioned above, the positioning hole 1b of the scrap 1a that was placed on the top surface 9b of the scrap dodging table is shifted from the positioning pin 8, and the part inside the positioning hole 1b is pushed up by the positioning pin 8, and the scrap 1a is Dropped outward from dodge platform 9. Thereafter, the trimmed press material 1 is taken out from the trimming lower mold 2, and the same operation is repeated thereafter.

As explained in detail above, the press material trimming device of the present invention automatically and reliably removes the scrap generated by trimming from the positioning pin, and has an extremely simple structure, making it particularly suitable for practical use. Become.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing an example of a pressed material trimmed by the trimming device of the present invention;
The figure is a partially cutaway side view showing one embodiment of the present invention. 1...Pressed material, 1a...Pressed material end, 1b
...Positioning hole, 2...Lower mold for trimming, 3...
...Upper mold for trimming, 5...Bearing stand, 6...Pin support member, 7...Coil spring, 8...Positioning pin, 9...Scrap dodging stand, 9a...Pin hole, 9b...Scrap dodging stand Top surface, 10...
Push down block.

Claims (1)

[Scope of utility model registration request] In a press material trimming device that positions and places the press material on the lower die and then lowers the upper die to trim the press material, the trimming device is supported movably up and down on the side of the lower die and is urged upward by an elastic member. a pin support member fixed to the upper part of the pin support member, a positioning pin that is fixed to the upper part of the pin support member so as to position the press material by fitting into a positioning hole drilled in an end of the press material; a push-down block that presses the pin support member attached and pulls out the positioning pin downward from the positioning hole when the upper mold is lowered; 1. A press material trimming device comprising a scrap dodging table having a downwardly inclined upper surface.