JPS598817Y2 - Press mold with scrap cutter - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a press die having a scrap force vine.

For example, as shown in Figs. 1 and 2, when separating a sheet metal member P after press working into a press work W as a product and scrap S on the periphery, that is, along the outer shape of the press work W, In order to facilitate post-processing of the scrap S when performing cutting (trimming) along the press work cutting line a, it is preferable to divide the scrap S into a plurality of pieces along the scrap cutting line b.

Therefore, various press dies have been proposed in which both cuts are performed in one downward stroke of the press device.

For example, an upper movable mold, which constitutes a part of the upper mold, is movable up and down, and is elastically crimped to a plate holder attached to the upper mold. Rimming is performed using the cutting blade that connects to the mold.

Thereafter, the upper movable mold is moved upward relative to the upper mold, and the scrap is cut by the scrap force vines of the upper mold and the scrap force vines of the lower mold.

However, in this method, since the upper movable mold is supported by the upper mold by an elastic member, the upper movable mold moves slightly upward during the trimming and does not operate simultaneously with the upper mold, which means that a part of the movable mold is delayed. This method has the disadvantage that chips are generated when sheet metal members are trimmed, and these chips adhere to the press work product, which tends to cause minute irregularities on the surface of the product.

The present invention was made in order to eliminate the above-mentioned drawbacks of the conventional method, and it is possible to securely lower the upper mold and the upper movable mold with respect to the lower mold by keeping their cutting edges in a continuous state. without producing chips, and then
The object of the present invention is to provide a press die having a movable upper die and a scrap force vine for cutting scrap by the scrap force vine.

Next, the present invention will be explained according to the drawings which are examples.

4 and 5 show a first embodiment of the present invention, and the press mold shown in the figures roughly consists of an upper mold 1, a plate holder 8 housed and attached in the upper mold 1, and a movable upper mold. The mold 11, the protrusion mechanism 18 that moves the upper movable mold 11 downward, the lower mold 6 corresponding to the plate holder 8, and the upper movable mold 11 cut the scrap S. Scrap power ivy 1
It is composed of 6.

The upper die 1 is attached to an upper die holder (none of which is shown) of a press machine installed opposite to the lower die 6, and has a recess 2 with an open bottom surface inside. It can be moved up and down by the device, and has a cutting blade 5 at the edge corresponding to the edge of the lower mold 6.

The lower die 6 is a sheet metal member P whose upper surface shape is pressed.
This matches the desired shape of the press work W, and the shape of the top surface of the periphery forms a trimming line L to form the cutting edge 7.

The plate holder 8 presses and fixes the sheet metal member P by pressing onto the lower mold 6, and its lower surface shape corresponds to the lower mold 6 and is moved up and down by a predetermined distance on the upper mold 1 by means not shown. This is possible and is always urged downward by the spring 9.

As shown in FIG. 3, the upper movable mold 11 is located between the recess 3 provided in the side wall of the upper mold 1 and the plate holder 8,
A trimming cutting blade 12 is provided on the lower edge on the plate holder 8 side, and a cutting blade 13 for cutting the scrap S is provided on the side intersecting the trimming line L.

Further, the upper movable mold 11 is always urged upward by a spring 15, which is an elastic member provided between the upper mold 1 and the upper mold 1. When the press mold is not in operation, the upper end of the upper movable mold 11 is 1, and the cutting blade 12 and the upper die 1
The cutting edge 5 is continuous on the same line.

In addition, FIGS. 4 and 5 show the operating state, and the upper mold movable mold 1
1 shows a state in which only 1 protrudes from the upper mold 1 as described below.

The scrap force vine 16 has a cutting edge 17 that intersects the trimming line L on the side of the lower die 6 and below the cutting edge 7 of the lower die 6, and the scrap force vine 16 has a cutting edge 17 that intersects with the trimming line L on the side of the lower die 6 and lower than the cutting edge 7 of the lower die 6. At times, the cutting blade 13 is used to cut the scrap S as described above.

The protrusion mechanism 18 moves the upper movable mold 11 downward after trimming, and the protrusion mechanism 18 moves the upper movable mold 11 downwardly after trimming.
It consists of a cam 19 having an inclined surface 20.21 corresponding to the inclined surface 10.14 provided on the opposite side surface of the cam 19, which is located between the groove 4 provided in the upper die 1 and the inclined surface 10.14. However, as the upper die 1 and the plate holder 8 move relative to each other, it is movable in the left and right directions in FIG. 4 within the groove 4.

Next, the operation of the press mold having the above structure will be explained.

First, it is assumed that the upper die 1 is placed above the lower die 6 by a press device.

In this case, the plate holder 8 is at the lowest limit, and the upper movable die 11 is pressed against the stopper portion 2a of the upper die 1 by the spring 15, and the cutting edges 5, 12 of the upper die 1 and the upper movable die 11 are pressed against the stopper portion 2a of the upper die 1.
is a continuous state on a line.

The cam 19 is located to the left of the position shown in FIG. 4 due to the upward movement of the upper movable mold 11.

Now, when the pressed sheet metal member P is placed on the lower mold 6, the upper mold 1 is lowered.

First, the plate presser 8 presses the sheet metal member P, and then lowers the sheet metal member P to the trimming line L using the lower mold 6, the cutting blades 7, 5, and 12 of the upper mold 1 and the upper movable mold 11. Cut along the line to obtain press work W.

When the upper die 1 further descends, the plate holder 8 maintains the same position, so as the upper die 1 descends, the force arm 19 moves to the right, that is, the upper movable die 11 moves against the spring 15. The cutting edge 13 moves downward and protrudes from the upper mold 1. The scrap S is cut by the cutting blade 17 of the scrap force vine 16 (FIGS. 4 and 5).

When the cutting of the scrap S is completed, the upper die 1 rises, and accordingly, the plate holder 8 and the upper movable die 11 return to their original states, and the press work W is transferred to the next process, and the cut scrap S is taken out from the press mold by a device not shown, completing one process.

6 and 7 show a second embodiment, in which the cam 19 in the first embodiment is replaced with a cam 22 which is rotatable about a shaft 23 on the upper movable mold 11. Since the rest is almost the same as the first embodiment, the same parts are given the same reference numerals and the explanation will be omitted.

That is, a cam 22 is rotatably mounted above the upper movable mold 11 via a shaft 23, and an inclined surface 10 is provided on the side surface of the plate holder 8 that the cam 22 faces.

Therefore, as in the first embodiment, when not in operation, the upper movable mold 11 is pressed against the stopper portion 2a of the upper mold 1 by the sprung 15, the plate holder 8 is in the position shown by the dashed line in FIG. 6, and the cam 22 is a position rotated clockwise.

Then, when the upper die 1 descends and further descends after trimming the sheet metal member P as in the first embodiment, the plate holder 8 relatively rises, so that the cam 22 moves toward the inclined surface 10.
rotates counterclockwise.

In other words, the rotation of the cam 22 causes the upper movable mold 11 to move downward and protrude from the upper mold 1, thereby cutting the scrap S.

As is clear from the above explanation, according to the present invention, the movable upper die holds its trimming cutting edge in the upper die in a continuous state and descends, trims the sheet metal member with the lower die, and then The lowering of the upper die activates the ejection mechanism to lower the upper movable die and cut the scrap with the scrap force vines, so that the upper die and the trimming cutting blade of the upper movable die are not damaged during trimming. No chips are generated due to continuous cutting, the cut surface is beautiful, and minute irregularities do not adhere to the press work.

[Brief explanation of the drawing]

Figures 1 and 2 are a plan view and a sectional view showing an example of a pressed sheet metal member, and Figure 3 is an upper mold, a lower mold (plate holder), a movable upper mold, and a scrap of the press mold of the present invention. FIG. 4 is a partially sectional front view showing the first embodiment of the present invention, and FIG.
Figure 6 is a partial cross-sectional front view showing the second embodiment of the present invention, and Figure 7 is a cross-sectional view taken along line Vll-VII in Figure
FIG. 1... Upper die, 5... Cutting blade, 6...
...Lower die, 7...Cutting blade, 8...Plate holder, 9...Spring, 10...Slanted surface, 11...・Upper movable mold, 12... Cutting blade, 13... Cutting blade, 14... Inclined surface, 1
5...Spring, 16...Scrap force vine, 17...Cutting blade, 18...Protrusion mechanism, 19.22...Cam .

Claims (2)

[Scope of utility model registration request] (1) In a press mold that cuts and divides the scrap part after trimming the press work,
A lower mold having a cutting blade for trimming the press work is disposed opposite to an upper mold that is movably mounted on the press device, and a plate holder that presses the upper surface of the press work during trimming is attached vertically to the upper mold. The upper die is provided with a trimming cutting edge which is continuously urged upwardly by an elastic member and which is continuous with the trimming cutting edge of the upper die in a state in which it is in pressure contact with the stopper portion of the upper die in the raised position. While supporting the upper movable mold so as to be movable in the vertical direction, a scrap force vine having a cutting edge in a direction intersecting the trimming cutting blade of the lower mold is disposed below the trimming cutting blade of the lower mold, and The upper movable mold is formed with a cutting edge for scrap cutting that faces the scrapping force vine, and further,
A press die having a scrap force vine, characterized in that a protrusion mechanism is provided for protruding an upper movable die below the upper die after trimming a press work. (2) The projecting mechanism is configured to project the upper movable mold downward by a cam that moves as the upper mold descends after trimming while contacting the plate holder. A press mold having a scrap force vine according to claim 1 of the registered utility model claim.