JPS61180622A - Laminated punching die - Google Patents

Abstract

PURPOSE:To prevent deflection of a die by adding an increased flexural rigidity to the die and to solve burr and warp problems of punched products by putting plural vertical plates being vertical to the laminating direction of a laminated flat plate die holder between a lower die bed of a laminated punching die and a die plate. CONSTITUTION:The plural vertical plates being vertical to the laminating direction, having a suitable space, and facing to a die hole 10 are put in the laminated flat plate die holder 2 having the die hole 10 between the lower die bed 6 of the laminated punching die and the die plate 1. a projection 15a of the vertical plates 15 is fitted into holes 1a of the die plate 1 and is joined not to move. That die prevents deflection of the cutting edge of the die plate 1 to eliminate occurrence of burrs and warps of products for punching by a punch 3 and to produce good products.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a laminated cutting die, and is effective when used as a press device for punching out a predetermined shape from a plate-shaped workpiece.

[Conventional technology]

Conventionally, in order to reduce the cost of manufacturing molds, an upper mold and a lower mold are formed by laminating a plurality of flat plates and adhering them to each other, as shown in, for example, Japanese Unexamined Patent Publication No. 53-91061. Things are being thought out. This conventional laminated cutting die is shown in FIG. In the figure, reference numeral 8 indicates a support that is fixed to the sides of the press machine body. On top of this bolster 8, a lower mold stand 6 is installed, which is formed by laminating several dozen punched flat plates, and on top of that, a lower mold base 6 is formed by laminating dozens of flat plates. The die backup plate 2 to be formed is fixed. Furthermore, a plate-shaped die plate 1 is placed on this die backup plate 2.
is fixed, and a die hole 10 is formed in the center of the die plate 1, the die bank amplifier plate 2, and the lower mold stand 6 for punching out the punched product.

Further, the bolster 8 is also formed with a pilot hole 14 for removing the product that has passed through the die hole 10. The periphery of the die hole 10 formed in the die plate 1 is formed by shearing force, and is used to punch out the workpiece using a punch 3, which will be described later. This die plate 1
is supported by the die backup plate 2 and the lower die stand 6, and the die bank amplifier plate 2 and the lower die stand 6 form a stand holder.

A punch 3 having a shearing force is arranged above the die plate 1, and this punch 3 is fixed to a punch backup plate 4 formed by laminating a plurality of flat plates, and furthermore, this punch backup plate 4 is formed on an upper mold base 5 formed by laminating several dozen flat plates. This upper mold stand 5 is further fixed to a slide 9, and an upper mold 21 is constituted by this slide 9, the upper mold stand 5, the punch backup plate 4, and the punch. Further, a lower mold 20 is constituted by the die plate 1, the die backup plate 2, the lower mold stand 6, and the bolster 8. The upper mold 21 and the upper mold 20 are connected to the guide post 11.
The upper mold 21 moves on this guide post 11 in the vertical direction in the figure. A stripper 7 is disposed on the upper mold table 5 via a spring 7a, and the punch 4 is inserted into the die hole 10 of the die plate 1.
By passing through the punch 3, it plays the role of peeling off the workpiece stuck in the punch 3 from the punch when the workpiece is punched out.

[Problem that the invention seeks to solve]

However, the following problems occur in the conventional laminated cutting die as described above. That is, as shown in FIG.
0 and punch out the workpiece 12 (when the die plate 1, the die backup plate 2, the lower mold stand 6
A problem arises in that the material is bent as shown in the figure. That is,
Due to the processing force (press force) of the upper mold 21, the die plate 1,
The die backup plate 2 and the lower die base 6 are bent downward using the outline of the pilot hole 14 of the bolster as a fulcrum. Such deflection of the die plate i, die backup plate 2, and lower mold stand 6 causes adverse effects such as warping and warping of the product. Note that the pilot hole 14 of the bolster 8 is generally larger in diameter than the die hole 10.

[Means for solving problems]

In view of the above-mentioned problems, the present invention aims to prevent the die receiving part that supports the die plate from being bent, and uses the following means. That is, a plurality of vertical plates are inserted perpendicularly to the stacking direction into a die receiving part formed by laminating a plurality of flat plates, thereby improving the bending rigidity of the die receiving part.

[Effect]

In general, a flat plate has very high bending rigidity against bending forces acting in the longitudinal direction, but has low bending rigidity against bending forces acting perpendicularly to the longitudinal direction. Therefore, by inserting the vertical plate perpendicularly to the stacking direction of the die receiving part, the force acting on the die receiving part acts in the longitudinal direction of the vertical plate, and the bending rigidity of the entire die receiving group is increased by this vertical tension.

〔Example〕

Next, embodiments of the present invention will be described based on the drawings.

Note that the same components as those of the above-mentioned conventional example are given the same numbers and their explanations are omitted.

FIG. 1 is a sectional view of this embodiment. As in the conventional example, a lower mold stand 6 formed by laminating a plurality of flat plates and a die backup plate 2 are fixed on the bolster 8, and a die plate 1 is mounted on the upper surface of the die backup plate 2. Fixed. Further, an upper mold base 5 made of a plurality of stacked flat plates is fixed to the slide 9, a punch backup plate 4 is fixed to this upper mold base 5, and a punch 3 is fixed to this punch backup plate 4. has been done. These lower die base 6, dieback assop plate 2, upper die base 5, and punch hack up plate 4 are made of steel plates with a plate thickness of 8 fins or less, such as SK material, 5 fins, etc.
It is made from PCC material, SP HC material, etc. Six vertical plates 15 are inserted into the die backup plate 2 at regular intervals in a direction perpendicular to the stacking direction thereof.

FIG. 3 is a perspective view of the lower die stand and die backup plate 2. FIG. This die bank up plate 2 has a total of six vertical plate insertion holes 21 formed around the die hole 10, three on each side. And this vertical plate insertion hole has a third
Vertical plates 15 drawn at the upper left in the figure are inserted respectively. This vertical plate 15 is the die bank up plate 2,
It is formed from a steel plate of the same thickness and material as the lower mold stand 6 and the like, and has a positioning protrusion 15a. When this vertical plate 15 is inserted into the vertical plate insertion hole 21, only this positioning protrusion 15a protrudes from the upper surface of the die backup plate 2, and the positioning hole 1a of the die plate 1-1 arranged on the upper surface of the die backup plate 2 Each positioning protrusion 15a is fitted into the positioning protrusion 15a. FIG. 4 is a perspective view of the die plate +-1. The die plate 1 has the positioning hole 1a around the die hole 10 in the vertical plate 1.
It is perforated at a position corresponding to 5. This die plate 1 is placed on the die backup plate 2, and the vertical plate 15
The position of the vertical plate 15 is fixed by fitting the positioning protrusion 15a into the positioning hole la of the die plate l. Therefore, the side surface 15b of the vertical plate 15 facing the die hole 10 is always located on the same plane as the die hole 10. Note that the number of laminated die backup plates 2, lower mold stand 6, upper mold stand 5, and punch hack up plate 4 is not limited to the number shown in the figure, but may vary depending on various conditions such as product shape and punching force. The number of each sheet is selected as appropriate.

Next, the operation of this embodiment will be explained. FIG. 1 shows a state in which the upper mold 21 has moved upward in the figure and the mold is open. In this state, the workpiece lO is placed on the die plate 1. Then, the upper die 21 is lowered with a predetermined force, and the punch 3 is lowered toward the die plate 1 with a predetermined punching force. Then, the workpiece placed on the die plate 1 is punched into a predetermined shape by the punch 3 and the die plate L, and the punched product passes through the die hole 10 and further through the pilot hole 14. passed through and taken out.

FIG. 2 is a diagram showing the state immediately after the workpiece 10 is punched out. At this time, the stripper 7 is in contact with the upper surface of the workpiece 10, and the workpiece 10 is pressed against the die plate 1 by the biasing force of the compressed spring 7a.

When the punch 3 moves upward in the figure, the unprocessed material 10 after being punched is prevented from rising together with the punch 3. In the punching process as described above, the die plate l, the die backup plate 2, the lower mold stand 6
A large bending load acts perpendicularly to the stacking direction, but since the vertical plate 15 is inserted into the die back-up plate 2 in the same direction as the bending load, the bending load of the die back-up plate 2 as a whole is The bending rigidity is increased, and the die backup plate and the lower mold stand 6 do not bend as in the conventional case. That is,
The bending load acting on the die backup plate 2 is supported by each vertical plate 15.

In this embodiment, the vertical plate 15 is a die buffer.

However, it is also possible to form a vertical plate insertion hole that passes through the die backup plate 2 and the lower mold table 6, and insert the vertical plate across both the die backup plate 2 and the lower mold table 6. . Although the number of vertical plates 15 is six in this embodiment, it is not limited to six and should be determined as appropriate depending on various conditions.

〔Effect of the invention〕

As described above, if the laminated cutting die of the present invention is used, a plurality of vertical plates are inserted into the die receiving part that supports the die plate in a direction perpendicular to the tank layer direction of the die receiving part, so that bending load is applied to the die receiving part. Even if this occurs, the bending load can be supported by the vertical tension, so the die receiving part will not bend, and problems such as warping or warping of the product can be solved.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing an embodiment of the present invention, Fig. 2 is a sectional view showing the operation, and Fig. 3 is a state in which a vertical plate is inserted into a die backup plate fixed on a lower die table. 4 is a perspective view of a die plate, FIG. 5 is a sectional view showing a conventional example, and FIG. 6 is a sectional view showing the operation of the conventional example. 1...Die plate, 2.6...Die backup plate, lower mold stand (die receiving part), 3...Punch. 15... Vertical plate, 20... Lower mold, 21... Upper mold. Representative Patent Attorney Takashi Okabe 1111Figure 2Figure 1υ I4 1') Figure 3aa Figure 4Figure 5Figure 6

Claims (1)

[Claims] A die receiving part in which a plurality of flat plates are stacked and fixed to each other, a plate-shaped die plate fixed on the die receiving part and having a die hole, and the die passing through the die hole of the die plate. 1. A stacked punching die, comprising: a punch for punching out a workpiece placed on a plate; and a plurality of vertical plates are inserted into the die receiving part perpendicularly to the stacking direction of the die receiving part.