JPH0347700Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a mold, and particularly relates to an improvement in the upper holder structure of a composite mold that simultaneously punches the outer shape of a hole in a workpiece in a press mold for processing the outer shape of a printed wiring board.

Conventionally, in molds for printed wiring boards, (a) in the case of molds that do not use a die set, die A and punch plate B are fixed with a common holder C as shown in Fig. 1, and the mold is pressed. A means for attaching and detaching the die to and from the press apparatus, and (b) a means for attaching and detaching the die to and from the press apparatus by providing a punch holder D, a push holder E, and a push desk (not shown) for each individual die as shown in FIG. is used. (C) In recent years, it has become common practice to attach a die changing device to the press device that moves up and down by a handle to which a positioning guide pin F is connected, as shown in Figure 3, to easily attach and detach the die. It is used.

However, with such conventional means, in the case of (a), that is, the mold that does not use a die set as shown in Fig. 1, the mold is placed on the bolster (hole punching table) of the press machine with the upper mold and lower mold fitted together. It is necessary to lower the ram to the specified position, fix the shank of the upper mold, equalize the clearance of the mold, and then clamp the lower mold to the bolster (hole punching table). This has the disadvantage that positional deviation errors occur during installation. In addition, as shown in FIG. 2, when the mold is provided with a punch holder D, a push desk holder E, and a push desk (not shown) for exclusive use in the mold, the die A, external punch G, and stripper plate H of the mold are used. , the mold function parts such as Shutder I, etc.
Although it is essential to manufacture each external shape of the printed circuit board, the mold structure parts such as the punch holder D, push desk holder E, and push desk holder E can be generalized, and the mold structure parts can be used exclusively. There was also the disadvantage that the weight of the mold increased.
Furthermore, when attaching the mold changing device shown in FIG. 3 to a press machine, it is necessary to install a mold changing device for each press machine, which has the disadvantage of increasing equipment investment.

The purpose of the present invention is to provide a mold that eliminates such conventional drawbacks, and is an improvement on a compound type mold that simultaneously punches the outer shape of a workpiece and a hole. Especially common parts of the mold, punch holder D,
This is an improved mold upper holder for the purpose of standardizing the mold structure of push desk holder E, push desk, etc., and making it more versatile.

According to the present invention, an upper mold having a general-purpose holder that integrally combines a shank, a punch holder, and a push desk holder, and suspends the push desk from the punch holder by loosely fitting the push desk into the push desk holder. and a lower die that fits into the upper die, further comprising a die and an outer punch for punching the outer shape of the workpiece, respectively disposed in the upper die and the lower die, and a die for punching the outer shape of the workpiece. A mold is obtained, characterized in that a perforation punch is set on the punch plate of the upper mold, and a punching portion is provided on the outer punch of the lower mold at a position facing the perforation punch.

Hereinafter, one embodiment of the present invention will be described with reference to FIGS. 4 to 6.

In the figure, reference numeral 1 indicates a shank, and the outer diameter of the shank 1 is set to be the same as the mounting diameter of the press lid and the shank. A through hole 2 is provided in the center of the shank 1 into which a knockout rod (not shown) for knocking out the push desk 3 can be inserted. The tip of shank 1 is threaded,
After screwing into the screw hole 4a provided in the punch holder 4, the threaded part of the shank 1 and the screw of the punch holder 4 are tightened to prevent the contact part between the shank 1 and the punch holder 4 from loosening due to vibration during press working. The punch holder 4 is attached by tightening the contact portion of the hole 4a from the bottom surface of the punch holder 4 with a hexagon socket set screw 5.

A push desk holder 6 is fixed to the lower surface of the punch holder 4 by tightening hexagon socket head bolts 7 at about 10 locations. The push desk holder 6 is provided with a groove for storing the push desk 3 in a suspended state, and the push desk 3 is suspended by a hanging bolt 11. An elastic member 8 such as urethane rubber is placed between the punch holder 4 and the push desk 3.
interposed, and the die sheeter 14 shown in FIG.
The structure is such that it can be pressed with a push pin 20 via a push desk 3. Note that a gap 9 of about 6 mm is provided between the push desk 3 and the punch holder 4. This gap 9 is the dimension of the engagement of the blades of the upper and lower molds, the board thickness of the printed wiring board, and the mold re-grinding allowance. The dimensions allow for the use of The pressing force of the push desk 3 is adjusted by providing screw holes at eight required locations in the punch holder 4 and pressing the upper part of the elastic member 8 through the screw plug 10. The push desk 3 has about four screw holes so that the hanging bolts 11 can be screwed in a raised pattern, and the hanging bolts 1 are inserted through the hanging bolt counterbore holes of the punch holder 4.
1 is inserted and tightened to suspend the push desk 3. The punch holder 4 and the push desk holder 6 are provided with a counterbore hole 12 for integrally assembling a mold upper functional section 30 consisting of a die 13, a punch plate 16, and a slider 14. The pitch of the counterbore holes 12 can be made more general by providing them at equal intervals with the tightening screw holes 22a drilled in the die base plate 19, which is a part of the above-mentioned mold upper functional section 30.

Next, the process of simultaneously punching out the outer shape of the workpiece and the hole will be explained using FIG. 6.

When punching a workpiece, the workpiece is placed on the stripper plate H of the lower mold and the outer punch 18 surface. At this time, the pilot hole previously provided in the workpiece is aligned with the pilot pin 23 and installed at a predetermined position.

Next, when the (slide ram) of the press device (not shown) descends, the linked upper die descends. The workpiece is restrained by the sheeter 14, the stripper plate H, and the contour punch 18. At this time, the upper die shedder 14 is connected to the push pin 20 and pushed down by the elastic member 8 provided on the upper surface of the push desk 3.

In addition, in order to adjust the strength of this restraining force, a screw plug 10 disposed on the punch holder 4 is provided.
There is.

Then, when the press device is further lowered, the punching process using the perforation punch 17 and the external punching process using the external punch 18 and die 13 can be performed simultaneously. As described above, the workpiece is separated into a product and a sample. At this time, the punched hole dregs fall into the punched part 17a, and the product is press-fitted into the inner surface of the die, but the press device rises and the punched out rod ( (not shown) is pressed by the knock-out mechanism of the press device and hits the push desk 3, and presses the sheeter 14 via the push pin 20, thereby causing the product to fall from the inner surface of the die.In this way, the product has an outer shape and a hole punched out at the same time. is completed.

Next, the overall structure of the mold according to the present invention will be explained with reference to FIG.

A shield 14 is fitted inside the die 13, and a suspension bolt 15 for the shield is fitted in the shield 14.
is clamped and suspended from the punch plate 16. On the punch plate 16, a punch 17 for punching printed wiring boards is attached to a punching portion 17 of a lower outer punch 18.
It is planted so that the clearance is even with a. Further, a die base plate 19 is placed on the upper surface of the punch plate 16, and the punch plate 16 and the die base plate 19 have through holes 20a into which push pins 20 for pushing out the cut printed wiring board from the die 13 are fitted. There are several. Further, the die base plate 19 is provided with an escape hole for the hanging bolt 15 for the cutter, and the die 13 and the punch 16 are tightened and fixed via the hexagonal socket bolt 21. Mold upper functional section 30
Push desk holder 6, punch holder 4
In order to attach the punch plate 16 to the die upper holder 40, which is made up of both of the above, the punch plate 16 is screwed onto the lower surface of the die base plate 19 which is screwed onto the lower surface of the push desk holder 6. This screw is tightening bolt 2
2 and the screw hole 2 provided in the die base plate 19
2a. The screw holes 22a are machined to a diameter of 12 mmφ and are spaced equidistantly from the counterbore holes 12 drilled in the mold upper holder 40, and by making the number of holes the same as the counterbore holes 12, it is easy to connect with other molds. Provides compatibility.

In this way, the mold upper holder 40, the die base plate 19, and the mold upper functional part 30 are mounted and integrated, and screwed and fixed using the tightening bolts 22. Also, the push desk 3 loosely fitted into the push desk holder 6 of the mold upper holder 40
A push pin 20 whose upper surface is pressed by an elastic member 8 and fitted into the die base plate 19 is brought into contact with the lower surface of the push desk 3. Therefore, the sheeter 14 is configured to uniformly receive the elastic pressure of the elastic member and eject the printed wiring board that has been pressed out in a well-balanced manner from the die 13.

As described above, the present invention has the following effects.

(i) Conventionally, a punch holder, push desk holder, and push desk, which were always produced each time a mold is manufactured, can be manufactured as a versatile mold upper holder. Therefore, the manufacturing cost of the mold can be reduced. (ii) Also, even if the press equipment has a different shank diameter, if you prepare one mold upper holder with the corresponding shank diameter, the molds are compatible, so it can be installed on the press equipment. be. (iii) Furthermore, as mentioned in (i), since there is no need to manufacture the punch holder, push desk holder, and push desk individually, there is an advantage that the storage space for the molds is reduced and the weight of the stored molds is reduced.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a conventional mold in which the die and punch plate are fixed with a common holder. FIG. 2 is a perspective view of a conventional mold for processing the outer shape of a printed wiring board. FIG. 3 is a sectional view of a mold device used to explain a conventional example.
4 and 5 are a plan view and a sectional view of a mold according to an embodiment of the present invention. FIG. 6 is a sectional view illustrating the operating state of the mold of the present invention. 1... Shank, 2... Through hole, 3... Push desk, 4, D... Punch holder, 5... Set screw, 6, E... Push desk holder, 7
...Hexagon socket head bolt, 8...Elastic member, 9...
Gap, 10... Screw plug, 11... Hanging bolt, 12... Counterbore hole, 13, A... Die, 1
4, I...Sietzder, 15...Hanging bolt for Sietzder, 16, B...Punch plate, 17...
...Drilling punch, 17a...Drilling part, 18, G
... External punch, 19 ... Die base plate,
20... Push pin, 21... Hexagon socket head bolt, 22... Tightening bolt, 30... Mold upper functional section, 40... Mold upper holder, C... Common holder, F... Guide pin, H... ...Stripper plate, 4a...screw hole, 23...pilot pin.

Claims (1)

[Claims for Utility Model Registration] (1) A shank, a punch holder, and a push desk holder are integrally combined, and the push desk is loosely fitted into the push desk holder and suspended from the punch holder; A bolt hole that is continuously provided between the punch holder and the push desk holder is provided at the same position as a screw hole of the die base plate, and a general-purpose holder for attaching the mold upper functional part to the die base plate is provided. and a lower die that fits into the upper die, and further includes a die and an outer punch for punching the outer shape of the workpiece, respectively disposed in the upper die and the lower die, and A mold characterized in that a perforation punch for punching holes is mounted on the punch plate of the upper mold, and a punching portion is provided on the outer punch of the lower mold at a position facing the perforation punch. (2) The mold according to claim 1, wherein a screw plug and an elastic body are vertically and closely inserted between the punch holder and the push desk.