JPH03189021A - Die of punch press - Google Patents

Abstract

PURPOSE:To improve the efficiency of shearing and separating operations by providing slender cutting edge parts to the bottom ends of punch bodies provided via elastic members in a punch holder so as to intersect with a longitudinal direction. CONSTITUTION:The punch bodies 19A, 19B are provided via the elastic member 25 in the punch holder 11 which is freely vertically movable and attachably and detachably exchangeable in the punch mounting holes of the upper die supporting part 1 of the punch press. The cutting edge parts 31A, 31B are formed slender so as to intersect with each other in a longitudinal direction and are provided at the bottom ends of the punch bodies 19A, 19B. Rapid dealing with is possible in this way at the time of shearing and separating relatively large products or scrap from, for example, large plate materials. The working efficiency is thus improved.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention relates to a mold used by being attached to, for example, a turret punch press or a normal punch press. It relates to a mold used when shearing and separating relatively large products or scraps from plate materials.

(Prior art) Conventionally, for example, a turret punch press or a punch press equipped with a plurality of molds on the tool support has a mechanism for automatically moving a large rectangular plate-like workpiece such as a fixed-length material in the X-axis and Y-axis directions. A moving positioning device is provided for moving and positioning the vehicle. After the workpiece is moved and positioned to a processing position by the moving positioning device and a desired punching process is performed, a relatively large product or scrap may be sheared and separated from the workpiece.

As mentioned above, nibbling is a process for shearing and separating products or scrap from a workpiece, but if the product is rectangular, shearing and separation can be done by punching using a punch with a rectangular cutting edge. It is being done.

(Problem to be Solved by the Invention) Conventionally, in order to perform the above-mentioned processing in, for example, a turret punch press, first, for example, a mold with a cutting edge that is long in the X-axis direction is used to move the workpiece in the X-axis direction. While moving
Performs overtaking in the axial direction.

Next, the turret in the turret punch press is rotated to index the mold with a long cutting edge in the Y-axis direction to the processing position, and then the workpiece is moved in the Y-axis direction and overtaking processing is performed in the Y-axis direction. Rectangular products or scraps are sheared and separated from large plate-shaped workpieces.

Therefore, in the past, it was necessary to install a mold with a long cutting edge in the X-axis direction and a mold with a long cutting edge in the Y-axis direction on the turret. In order to perform overtaking in the Y-axis direction after overtaking in the Y-axis direction, a heavy and large turret must be rotated and indexed, which poses a problem in improving work efficiency.

[Structure of the Invention] (Means for Solving the Problems) In view of the above-mentioned conventional problems, a mold according to the present invention provides a mold for attaching a punch to a punch mounting hole formed in an upper mold support portion of a punch press. A plurality of punch bodies are each supported via an elastic member in a vertically movable and removably replaceable punch holder, and the cutting edge formed at the lower end of each bunch body is elongated. In addition to being formed into a shape, the longitudinal direction of each cutting edge portion is formed in a direction that intersects with each other.

(Function) With the above configuration, for example, when the workpiece is mounted on the turret of a turret punch press and indexed and positioned at the processing position, the workpiece can be moved in the direction along one cutting edge part and overtaken by the moving positioning device of the turret punch press. By performing machining and then performing overtaking machining while moving the workpiece in the direction along the other cutting edge,
A slit can be formed in a direction that crosses the workpiece. Therefore, by performing the above-mentioned punching process, for example, at an edge speed in a direction crossing from the edge of the work, it is possible to shear and separate the product from the work. Furthermore, by performing the punching process so that the slit becomes annular, a large rectangular hole can be formed near the center of the workpiece.

(Example) Referring to FIG. 1, an upper mold 3 is removably supported on an upper mold support part 1 that supports an upper mold, such as an upper turret in a turret punch press (not shown). , the lower mold support part 5 (corresponding to the lower turret in the case of a turret punch press) that supports the lower mold,
A lower mold 7 corresponding to the upper mold 3 is detachably supported.

The upper mold 3 is mounted in a punch mounting hole 9 formed in the upper mold support 1 so as to be vertically movable and detachable. More specifically, a cylindrical bunch holder 11 is fitted into the punch device hole 9 so as to be vertically movable. A plurality of pins 13 are protruded from a plurality of locations on the outer peripheral surface of the punch holder 11, and the pins 13 are urged upward by a lifter spring 15 or supported by a lid block 17.

Therefore, the punch holder 11 has a lifter spring 1
5, it is supported in a raised state with respect to the upper mold support part 1. In addition, punch holder 1
The directionality of the punch holder 1 is always kept constant by engaging the key 12 in a key groove 11K formed on the outer peripheral surface of the punch holder 11.

A plurality of bunch bodies 19 are included in the punch holder 11.
A, 19B are supported vertically movably, and a punch head 21A is attached to the upper end of each bunch body 19A, 19B by a plurality of bolts, respectively.

21B is fixed. And punch head 2IA,
Each bracket 23A, 23B contacts 21B from below
An elastic member 25 (see FIG. 2) made of, for example, a coil spring or elastic rubber is mounted between the punch holder 11 and the punch holder 11 as a stripper spring.

Therefore, each punch body 19A, 19B is in a state where it is urged upward with respect to the punch holder 11 by the action of the elastic member 25.

A punch tip 29A is attached to the lower part of each of the bunch bodies 19A, 19B via a bolt 27.

29B is removably attached. This punch tip 2
At the lower ends of 9A and 29B, as shown in FIG.
1A and 31B are formed.

Further, each punch tip 29A, 29B has each key groove 33 formed in the punch holder 11 with a directionality different by 90''.
A, key 35A that engages with 33B.

35B is the attachment, and interference avoidance grooves 37A and 37B are formed to avoid interference with the other cutting edge.

Therefore, each punch tip 29A, 29B can be attached to both of the bunch bodies 19A, 19B as desired, and in order to improve work efficiency, the cutting edge portions 31A, 31
Even if B is formed longer and larger, the punch chips 29A and 29B will not interfere with each other. In addition, since each punch tip 29A, 29B is provided with a key 35A, 35B, respectively, to regulate directionality, there was a slight error in the mounting direction of each punch tip 29A, 29B with respect to each punch body 19A, 19B. Even so, the directionality of each punch tip 29A, 29B with respect to the punch holder 11 is accurately maintained.

Each punch body 19A, 19 for the punch holder 11
In order to smoothly move up and down B, each punch body 19
A and 19B are the fitting holes 11 into which the punch holder 11 is fitted.
Oil grooves 11AG and 11 are provided on the inner peripheral surfaces of A and IIB, respectively.
8G is formed, and each oil groove 11AG, IIBG is connected to an oil supply part 39 such as a grease nipple.

Further, a temporary presser foot 41 for suppressing and fixing the workpiece W to the lower mold 7 is fixed to the lower end of the punch holder 11 with bolts or the like.The lower mold 7 is similar to a normal goug in a punch press. In the relationship between the key and the keyway, the lower mold support part 5
The lower die 7 is formed with die holes 7A and 7B corresponding to the cutting edges 31A and 31B of the punch tips 29A and 29B.

In the above configuration, a punch press (not shown)
The workpiece W is moved by the action of the moving positioning device at
For example, by repeating the striking force of one punch head 21A with a vertically movable striker ST in a punch press while moving in the left-right direction in FIG.
A punching process is performed in the left-right direction, and a left-right slit is formed. Next, move the striker ST above the other punch head 21B, and
By repeating the striking force and moving the workpiece W in the front-rear direction (direction perpendicular to the plane of the paper in Fig. 1),
A slit in the front-rear direction is formed in the workpiece W by punching.

Therefore, as already understood, a rectangular product or scrap can be obtained from the workpiece W by continuously forming slits in the left-right direction and slits in the front-back direction in the workpiece W.

That is, according to this embodiment, while moving the workpiece in the front, rear, left, and right directions (Y-axis, X-axis directions) by the moving positioning device in the punch press, the punch tips 29A and 29B are selected to perform overtaking processing, and By continuously forming rear slits in the work W, rectangular products or scraps can be sheared and separated from the work W. At this time, the striker S in the punch press
By moving the T from above one punch head to above the other punch head, punch tip selection can be accomplished quickly. In addition, the workpiece W only needs to be moved by a small amount from one punch tip to the other, making it possible to quickly shear and separate a relatively large product or scrap from a large plate. This improves efficiency.

Note that the present invention is not limited to the above-described embodiments, but can be implemented in other embodiments by making appropriate changes.

[Effects of the Invention] As can be understood from the above description of the embodiments, according to the present invention, in order to form a slit in a direction that intersects a workpiece, the direction of the slit can be changed by slight movement of the striker in the punch press. Since the flexibility can be selected and the work can be handled by slightly moving the work, for example, when shearing and separating a relatively large product or scrap from a large plate, it can be handled quickly and is effective in improving work efficiency. It is something.

In addition, in a configuration in which the punch tip can be attached to and removed from the punch body, the punch tip is provided with a key or a keyway corresponding to the keyway or key of the punch holder, so the orientation of the punch tip with respect to the punch holder is difficult. can be maintained accurately at all times.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention; FIG. 1 is a sectional view taken along the line I-I in FIG. 2, FIG. 2 is a plan view, and FIG. 3 is a bottom view with the temporary presser omitted. be. 1... Upper mold support part 9... Punch mounting hole 11... Punch holder 19A, 19B... Punch body 25... Elastic member 29A, 29B... Punch tip 31A, 31B... Cutting blade portions 35A, 35B...Keys 33A, 33B...Key grooves

Claims (2)

[Claims] (1) A plurality of punch bodies are movable up and down through elastic members, respectively, on a punch holder that is supported in a punch holder that is vertically movable and removably replaceable with respect to the punch mounting hole formed in the upper die support part of the punch press. The cutting edge portion formed at the lower end of each punch body is provided in an elongated shape, and the longitudinal direction of each cutting edge portion is formed in a direction that intersects with each other. Mold for punch press. (2) In the invention according to claim 1, a punch tip having a cutting edge is removably attached to the lower end of each punch body, and the punch tip is attached to a key groove or a key provided in the punch holder. A mold for a punch press, characterized in that it is equipped with a key or a keyway that can be freely engaged with the die.