JPH0732062A - Punching device - Google Patents

Abstract

PURPOSE:To provide a punching device, in which a die is automatically aligned to a punch with a simple structure and the punching having high accuracy and high quality can be executed. CONSTITUTION:The punching device executes the punching to a work W by cooperating the punch P and the die D which are arranged so as to match and face to the work W, and consists of a punch body 3, in which the punch P is fitted so as to be shiftable in a shiftable punch guide 37, and a shiftable punch chip 47, in which the tip part is formed as the point shape in the punch body 35. Further, an engaging member 71 having an engaging hole 71H for engaging the tip part of the punch chip 47 into the die D, is arranged and also an automatic aligning device for automatically aligning the die D is arranged to a die holding member 27 for holding the die D.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a punching apparatus which performs punching by automatically aligning a die with a punch when punching is performed by cooperation of a punch and a die.

[0002]

2. Description of the Related Art A punching apparatus for punching a work by cooperation of a punch and a die held at the tip of a robot has been considered. In this punching machine, the punch and the die core may be misaligned during punching. If the cores of the punch and the die deviate from each other, burrs are generated and the punch and the die are bitten. As a result, there have been problems that the product precision and quality are deteriorated and the life of the mold is shortened.

In order to improve the above problem, a device for preventing the punch and the die from being misaligned with each other is, for example, the fairness 1
-20034 publication is known.

[0004]

By the way, in order to prevent the cores of the above-mentioned conventional punch and the die from shifting, a reference hole is formed as a reference in the work, and the reference hole is provided in the punch. Since the lock pin is lowered by the floating mechanism and locked in the reference hole, it is necessary to make a reference hole in the work in advance and the floating mechanism has a complicated structure.

In order to solve the above problems, an object of the present invention is to perform punching with high precision and high quality by automatically aligning the die with a simple mechanism for the punch. To provide a device.

[0006]

In order to achieve the above object, the present invention is a punching apparatus for punching a work by the cooperation of a punch and a die provided so as to be aligned and opposed to the work. A punch body movably mounted in a movable punch guide,
In the punch body, a punch tip having a tip end is formed, and an engaging member having an engaging hole for engaging the tip end of the punch tip is provided in the die and the die is held. It is characterized in that the die holding member is provided with an automatic aligning device and a fixing device for automatically aligning the die.

In the punching apparatus, it is desirable that the punch body is provided with a movable scrap push member.

[0008]

By using the punching machine of the present invention, the punch and the die are positioned with respect to the work. At this time, the locking device as a fixing device provided in the die holding member is unlocked, and the die is centered with respect to the die holding member. Then, the punch is stroked with respect to the work so that the tip end of the punch tip punches out the work. Further, when the punch is stroked, the tip portion of the punch tip is engaged with the engagement hole of the engagement member provided on the die. At this time, the die is automatically aligned with respect to the punch by the automatic alignment device,
The die is locked to the die holding member by the locking device.

Further, as the punch strokes, the work is punched by the cooperation of the punch and the die. When the punching process is completed, the punch and die separate from the work. At this time, the scraps are separated from the punch and the die by the scrap push member and the die provided on the punch body.

[0010]

Embodiments of the present invention will be described in detail below with reference to the drawings.

First, the overall structure of a punching apparatus 1 as an embodiment for carrying out the present invention will be briefly described.

Referring to FIGS. 6 and 7, the punching apparatus 1 comprises a left-handed robot 3 and a right-handed robot 5, and the left-handed robot 3 and the right-handed robot 5 are in close proximity to the left-handed robot 3 and the right-handed robot 5, respectively. Automatic tool changers 7, 9 are provided.

The work pallet rail 11 is X
The work pallet 13 is provided so as to extend in the axial direction and is provided on the work pallet rail 11 so as to be movable in the X-axis direction. A work lamp 15 for holding the work W in a vertical state is provided on the work pallet 13.
Are provided at appropriate intervals. Therefore, the work W
Will be vertically supported on the work pallet 13 by the work lamps 15 and transported.

Since the left-hand and right-hand robots 3 and 5 are already known, a detailed description of their structure and operation will be omitted. The left-hand and right-hand robots 3 and 5 are arranged symmetrically and have substantially the same structure. . That is, the Z-axis guide 19 is erected on the X-axis carriage 17 movable in the X-axis direction, and the Z-axis carriage 21 guided by the Z-axis guide 19 and movable in the Z-axis direction is provided.

Although not shown, the Z-axis carriage 21 is provided with an A-axis rotating body which is rotatable in the A-axis direction. Further, although illustration is omitted in the Z-axis carriage 21, B
A B-axis rotating body which is rotatable in the axial direction is provided, and a Y-axis arm 23 is provided on the B-axis rotating body so as to be expandable and contractable in a direction determined by the A and B axes. However, the Y-axis arm 23 is expanded and contracted in the Y-axis direction during normal molding.

A C-axis rotating body 25 rotatable in the C-axis direction is provided at the tip of the Y-axis arm 23, and a gripper 27 is attached to the C-axis rotating body 25.

With the above configuration, the left-hand and right-hand robots 3,
5 is provided with three linear axes of X, Y and Z, three rotational axes of A, B and C and one gripper axis.

Various tools are gripped by the gripper 27. For example, as shown in FIGS. 6 and 7, the gripper 27 of the left-handed robot 3 has a punch P and the gripper 27 of the right-handed robot 5 ( It is called a holding member.)
The work W is sandwiched by the punch P and the die D, and punching is performed.

That is, the gripper 27 of the left-handed robot 3
As shown in FIG. 1, the punch head 31 that is the head of the punch driver 29 that constitutes a part of the punch P is shown in FIG.
Are fixed by a plurality of setscrews 33.

A punch body 35 is integrated under the punch driver 29, and the punch body 35 is vertically movable in FIG.
1 and is vertically movable in FIG. The stripper plate 3 is provided below the punch guide 37.
9 is integrally provided. A stripping spring 41 is interposed between the punch guide 37 and the punch head 31 to urge the punch head 31 upward.

A counterbore hole 43 is formed in substantially the center of the punch body 35, and a punch tip 47 is moved downward in the counterbore hole 43 via a spring 45 biased downward in FIG. Is provided so as to project. The tip of the punch tip 47 has a pointed shape.
As an example of these various shapes, for example, a front view is shown in FIG. 5 (A), a cone is shown in FIGS. 5 (B), (C), and (D),
Bottom views of quadrangular and triangular pyramids are shown.

A plurality of counterbore holes are formed in the lower portion of the punch body 35, and a scrap push member 51 is provided in the counterbore hole so as to project through a spring 49 biased downward in FIG. There is.

The gripper 27 as a holding member for holding the die D is provided with an automatic centering device 53 and a locking device 55 as shown in FIGS. As the self-aligning device 53, grooves 57 are formed on the circumferential side surface of the die D, for example, at intervals of 90 degrees, and the gripper 27 is urged in the grooves 57 via a spring 59 biased inward.
A centering spool 61 is provided on the circumferential side surface of the. Further, as the lock device 55, a magnet 63 is provided substantially at the axial center of the gripper 27.

Referring again to FIG. 1, an ejector plate 65 is provided on the upper part of the die D, and plays a role of pushing out the punched waste (see FIG. 2) W _A from the die D at the end of the punching process. There is. A shoulder bolt 67 is attached to the surface of the ejector plate 65, and is slidable with respect to the die D. The ejector plate 6
5 is pushed to the outside of the die D by the ejector spring 69. An engaging member (bush) 71 having an engaging hole 71H for engaging the punch chip 47 when the die D is automatically aligned with the punch P is provided at the center of the die D. There is.

With the above structure, the punch P and the die D held by the gripper 27 of each robot 3, 5 are the work W.
Are positioned as shown in FIG. At this time, the magnet 63 provided inside the gripper 27 on the die D side is off, and the die D is centered by the centering spool 61 at the center of the gripper 27 by the weak spring force of the spring 59.

The punch P strokes downward with respect to the work W in FIG. 1, and the tip of the punch tip 47 pushes out the work W. When the stroke is further performed, the tip portion of the punch tip 47 is engaged with the engaging hole 71H of the engaging member 71 as shown in FIG. At this time, die D
The centering spool 61 is weak between the gripper 27 and the gripper 27.
Since the gap C is only centered by, the die D is automatically aligned with the punch P. Then, by turning on the magnet 63, the die D is locked.

Further, the punch P strokes and presses the work W with the stripper plate 39, and the punch P and the die D
The work W is punched in cooperation with. When the punching process is completed, the punch P and the die D are the work W respectively.
Move away. At this time, the punch P is the scrap push member 5
1, the ejector plate 65 causes the scrap W _A of the die D to be separated from the punch P and the die D.

Therefore, since the work W is punched out at the tip of the punch tip 47 at the center of the punch P, the work W can be reliably positioned with high accuracy. Further, since the die D is automatically centered with respect to the punch chip 47, it is possible to perform highly accurate centering and perform high-quality punching.

The present invention is not limited to the above-mentioned embodiments, but can be implemented in other modes by making appropriate changes. In this embodiment, the punch P is held while holding the punch P and the die D on the grippers 27 of the robots 3 and 5, but it is also possible to use a normal punch press or the like. The punch P, the gripper means for the die D, the means for providing backlash, and the locking means for the die D may be any other known means. Further, the cust push member 51 and the ejector plate 65 may be made of a resin material such as rubber or urethane.

[0030]

As will be understood from the above description of the embodiments, according to the present invention, since the construction is as described in the claims, the work is projected at the tip of the punch tip. Since the work is pulled out, the work can be reliably positioned with high accuracy. Further, since the die is automatically centered with respect to the punch chip, high-precision centering can be performed and high-quality punching can be performed.

[Brief description of drawings]

FIG. 1 is an enlarged sectional view of a punch and a die held by a gripper of a robot.

FIG. 2 is an operation explanatory view explaining the operation of the present invention.

FIG. 3 is an enlarged plan view of a gripper that holds a die.

FIG. 4 is a front view of FIG.

FIG. 5 is a diagram showing various shapes of the tip portion of the punch tip.

FIG. 6 is a front view of a punching apparatus according to an embodiment of the present invention.

FIG. 7 is a side view of FIG.

[Explanation of symbols]

 1 Punching machine 3,5 Left and right hand robot 27 Gripper (holding member) 35 Punch body 37 Punch guide 39 Stripper plate 47 Punch tip 51 Waste push member 53 Automatic aligning device 55 Lock device 61 Centering spool 63 Magnet 65 Ejector plate 71 Engagement member 71H Engagement hole

Claims (2)

[Claims] 1. A punching device for punching a work by cooperation between a punch and a die provided to face the work in alignment with each other, wherein the punch is movable in a movable punch guide. The punch body is mounted, and the punch body has a punch tip having a pointed tip, and an engaging member having an engaging hole for engaging the tip of the punch tip is provided in the die. At the same time, the die holding member for holding the die is provided with an automatic aligning device and a fixing device for automatically aligning the die, and a punching apparatus. 2. The punching device according to claim 1, wherein the punch body is provided with a movable scrap push member.