JPH1133997A - Punch die - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a punch die capable of removing chips stuck to the tip of a punch in relation to a workpiece such as a green sheet and a flexible base plate in which the punching pitch is extremely shortened. SOLUTION: Die holes 21a are formed on one plate into a die plate 21, an air flow passage 23 is formed by providing a communication groove 22d for communicating a communication hole 22c to be communicated with the outside and a release hole 22b with each other on the front surface of a supporting body 22 for supporting the die plate 21, and chips w1 stuck to the tip are removed by air-blowing the punch tip projecting to the relapse hole 22b in punching by compressive air from the outside is allowed to flow in the air flow passage 23.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a punch die used for punching a sheet-like or film-like soft work such as a green sheet or a flexible substrate.

[0002]

2. Description of the Related Art Conventionally, a punch of this type includes a movable die in which a plurality of punches for punching a work are inserted, and a die provided opposite to the movable die and having a die hole for receiving the punch. And a die holder for supporting the die. The die holder is mounted on a punch unit having an elevating mechanism to punch the above-mentioned soft work. By the way, when such a soft work is pierced, the swarf (hereinafter simply referred to as “chip”) does not fall under the die holder but closely adheres to the tip of the punch, and peels off inside the die or the pierced hole of the work. It often causes clogging. In order to solve this problem, as shown in FIG. 4, the die 3 is formed into a cylindrical bush type having a communication hole 31 communicating the outer peripheral surface and the inner peripheral surface thereof, and is embedded in the die holder 4. The air communication hole 41 provided in the die holder 4 between the three and the communication hole 31 of the die
And blows out the attached tip w1 by air blowing the tip of the punch 13 inserted at the time of punching.

[0003]

The method of blowing off the chip w1 attached to the tip of the punch by air blowing is extremely effective. However, the air flow holes 41 for supplying air to the respective dies 3 are provided with the dies 3. Die holder 4 between
, The distance between the pitches between the dies 3 is limited. This cannot cope with a work W such as a green sheet or a flexible substrate in which the perforation pitch has been extremely shortened. Moreover, the air circulation hole 41 is processed by using a small-diameter drill. However, in order to open a required hole depth, a drill having an appropriate diameter is used. The restrictions are very large.

Therefore, in order to cope with a work in which the perforation pitch is extremely shortened, such a conventional bush type as a die is abolished, and a die hole is formed in one plate to perform perforation. This corresponds to a work whose pitch is extremely shortened. However, naturally, the above-mentioned means cannot be adopted, and chips attached to the tip of the punch cannot be eliminated. SUMMARY OF THE INVENTION It is an object of the present invention to provide a punch die capable of removing a chip attached to the tip of a punch even for a work in which a punching pitch is extremely reduced.

[0005]

The technical means taken to achieve the above object is a movable type in which a plurality of punches which are moved up and down to pierce a work are inserted, and a movable type opposed to the movable type. A fixed die having a die plate provided with a die hole for punching a work with the punch and a support for supporting the die plate, wherein the support is a support surface of the support. A relief hole is provided in the support surface for releasing a punch projecting from the die hole at the time of drilling, and a communication hole provided at a required position in the support surface which escapes from the relief hole group and communicates with the outside. It is contacted by the communication groove,
The present invention is characterized in that a fixed airflow passage is formed by blowing air from a tip of a punch projecting into an escape hole at the time of punching by the support and a die plate attached to the support surface to blow off attached chips.

According to such technical means, a support having a surface provided with a communication hole and an escape hole for communicating with the outside and a communication groove for communicating the two and a die hole are opened and a die supported by the support. An air passage is formed by the plate and compressed air from the outside is blown through the air passage to air blow the punch tip projecting to the escape hole at the time of drilling to remove chips attached to the tip.

[0007]

Next, embodiments of the present invention will be described with reference to the drawings. Reference numeral A is a punch type, reference numeral 1 is a movable type, and reference numeral 2 is a fixed type. The punch die A includes a movable die 1 and a fixed die 2 supported on the lower end of a ram B that can move up and down.
The work W placed on the upper surface of the fixed mold 2 is pierced by the vertical movement of the ram B.

The movable die 1 has a punch holder 11 connected to the lower end of the ram B, a two-step recessed step portion 12a formed therein, a punch pad 12 connected to the punch holder 11, and a recessed step portion 12a. The head 13a is locked at the lower part of the punch 13 and a plurality of punches 13 are inserted and arranged in a quintic matrix, and the upper part of the concave step 12a provided from the upper surface of the punch pad 12 is covered and the punch 13 is fixed. And a stripper 16 which guides the leading end of the punch 13 and is vertically movably connected via a guide post 15. The stripper 16 abuts on the workpiece W and moves up and down relatively. This allows the tip of the punch 13 for performing the punching to protrude from the lower surface of the stripper 16.

The fixed die 2 includes a die plate 21 and a support table C.
And a support 22 fitted to the support 22. Die plate 21
The die 13 has a rectangular shape in plan view, and the die holes 21a for punching the work W with the punch 13 are formed in a fifth-order square matrix at an insertion pitch of the punch 13. The support 22 is
Escape holes 22b are formed in the support surface 22a formed in the concave step in the form of a fifth-order square matrix having a diameter larger than that of the die holes 21a at the same insertion pitch. A contact hole 22c appropriately opened by electric discharge machining in the escaped support surface 22a is provided so as to be screwed to the side surface of the support member 22 and communicate with the nipple D connected to the pneumatic circuit. An appropriate number of escape holes 22b are connected to one communication hole 22c in the support surface 22a by a communication groove 22d provided on the surface of the support surface. And the contact groove
A nozzle portion 22e is formed at a connection portion between the escape hole 22b and the escape hole 22b so as to be narrowed so as to increase a blowing speed of the compressed air. The support 22 is provided with a die plate on the support surface 22a.
An air flow passage 23 is formed to which the tip 21 of the punch 13 which is fitted and screwed and which projects into the escape hole 22b at the time of drilling is blown by air to blow off the attached chip W1.

The punch die A having the above-mentioned configuration is mounted on the upper surface of the fixed die 2 by lowering the movable die 1 to a predetermined position via the ram B by driving a lifting mechanism of a punch unit (not shown). While holding the work W held by the stripper 16, the punch W is punched with the punch 13 and the die hole 21a, and at the same time, the work W attached to the tip of the punch 13 passes through the air flow passage 23 and the compressed air whose ejection speed is increased by the nozzle 22e. Is blown away. Then, the separated chip W1 has the escape hole 22b and the support C
And falls into a chip receiving portion (not shown). It should be noted that although the support 22 is formed in two concave steps instead of the communication groove 22d and air can be blown even when the upper step is used as a support surface, the chip W1 that has adhered must be concentrated on one point and air blown. Cannot be surely peeled off, and a strength problem arises, so that it cannot be adopted.

[0011]

As described above, the present invention has the following advantageous effects. A cylindrical bush type such as a conventional die is abolished, a die hole is opened in the vicinity of one plate to form a die plate, and a communication hole for communication with the outside is formed on the surface of the support supporting the die plate. Since the air flow passage is formed by providing a communication groove that communicates with the hole, the workability of the communication groove that forms the air flow passage is easy, and precision machining such as electric discharge machining is possible. It is possible to provide a punch die that can remove chips attached to the tip of a punch even for a work in which the perforation pitch has been extremely shortened while employing an air blow method that is effective as a means for removing attached chips.

[Brief description of the drawings]

FIG. 1 is a sectional view of a punch die according to the present invention.

FIG. 2 is a partially cutaway perspective view of a fixed type.

FIG. 3 is an operation diagram of chip peeling during drilling.

FIG. 4 is a sectional view of a conventional fixed type.

[Explanation of symbols]

A: Punch type 1: Movable type W: Work
w1… Chip 13… Punch 2… Fixed type 21a… Die hole
21 ... Die plate 22 ... Support 22b ... Escape hole 22c ... Connection hole
22d ... communication groove 23 ... air flow passage

Claims (1)

[Claims] 1. A movable die in which a plurality of punches for raising and lowering and punching a workpiece are inserted, and a die plate having a die hole formed in a position facing the movable die and punching a workpiece with the punch. And a fixed type having a support for supporting the die plate, wherein the support is provided in a support surface of the support and an escape hole for releasing a punch projecting from the die hole at the time of punching. A communication hole provided at a required position in the support surface that escapes from the escape hole group and communicating with the outside is connected by a communication groove provided on the surface of the support surface, and the die attached to the support and the support surface A punch type, wherein a fixed air flow path is formed by blowing air from a tip of a punch projecting into an escape hole when a plate is punched and blowing off attached chips.