JPH1133641A - Piercing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the piercing device provided with the mechanism surely removing pierced slug remaining in the die being the hole for piercing. SOLUTION: In this device, the operating member 7 is retreated with an active cam 3 accompanied by the descending of an upper die, the die 11 is advanced toward a piercing punch 5, and a passive cam 4 is advanced to advance the piercing punch 5 toward the die 11, whereby a work W is pierced. The operating member 7 is advanced by the ascending of the upper die and the passive cam 4 is retreated, whereby pierced slug remaining in the die 11 is pushed out to remove with a pushing out pin 12 by the retreating of the die 11 accompanied by the advancing of the operating member 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a punching apparatus provided with a mechanism for surely removing a punch residue clogging a die after punching.

[0002]

2. Description of the Related Art As shown in FIG. 5, a conventional punching apparatus converts a passive cam 4 provided with a punching punch 5 corresponding to a punching hole 2 corresponding to a die in a lower die 1 into a lower die. The active cam 3 provided on the upper die (not shown) is provided so as to be capable of moving forward and backward, and the passive cam 4 is moved forward by the lowering of the upper die so that the work W
Is a structure for punching holes.

[0003]

SUMMARY OF THE INVENTION In a punching apparatus,
In some cases, a scrap removed by the punch 5 may be clogged in the hole 2 for punching. In order to eliminate this, a wiping pin 5a is provided at the tip of the punch 5 in the related art. In many cases, it is not possible to remove the scrap from the hole 2 for punching with the restricted stroke amount of 4,
The challenge was to ensure that they were eliminated.

[0004] It is an object of the present invention to provide a punching apparatus provided with a mechanism for reliably removing a punch residue remaining in a die which is a hole for punching.

[0005]

Means for Solving the Problems To achieve the above object, the present invention provides a construction in which a lower die is provided with an extruding pin for removing scum,
The die includes a die that penetrates the push-out pin and a movable cam member provided with an operating cam, and a passive cam that can be advanced and retracted provided with a punch corresponding to the die. An active cam is provided to abut the passive cam and move the operating member and the passive cam in the relative direction, and the upper die lowers the active member by the active cam to move the die toward the punch. While moving, the passive cam is moved forward, the punch is advanced toward the die to punch the work, and the upper die is raised to move the operating member forward, and the passive cam is moved backward, The present invention is characterized in that, when the die is retracted due to the advancing movement of the operating member, the extruded pins push out and remove the scraps remaining on the die.

[0006]

Embodiments of the present invention will be described with reference to the drawings. In FIG. 1, reference numeral 1 denotes a lower mold. Of the front and rear elevation walls 1a and 1b on the side surfaces of the lower mold 1, the front elevation wall 1
A is provided with a hole 13 into which a die 11 to be described later is fitted, and a pushing pin 12 of a scrap that penetrates the die 11 to be described later is fixed to the rear face wall 1b.

The lower die 1 is provided with a passive cam 4 having a punch 5 and an operating member 7 so as to be movable forward and backward. Reference numeral 6 denotes a return spring of the passive cam 4, and reference numeral 10 denotes a return spring of the operating member 7.

As shown in FIGS. 3 and 4, the operating member 7 has an U-shaped cross section in order to escape the pushing pin 12 fixed to the rear wall 1b of the lower mold 1 in front of the operating member. 9 extends rearward in parallel with the actuating member 7,
The lower die 1 penetrates the rear wall 1b. A die 11 is fixedly provided at the tip of the arm 9. The rear end is provided with an operation cam 8.

The passive cam 4 is mounted on an upper die (not shown).
And an active cam 3 which comes into contact with the operation cam 8.

The operation of the present invention having the above configuration will be described. FIG. 1 shows the state of the upper die at the top dead center. In this state,
The passive cam 4 is located at a retracted end by a return spring 6, and the operating member 7 is located at a forward end by a return spring 10.

At the forward end of the operating member 7, the die 11 at the tip of the arm 9 moves backward and abuts the rear wall 1b of the lower mold 1, and the push pin 1 fixed to the rear wall 1b.
2 penetrates the hole of the die 11.

When the upper die is lowered, the active cam 3 is also lowered and comes into contact with the passive cam 4 and the working cam 8. Thereby, the passive cam 4 moves forward in the left direction in FIG.
Moves backward to the right. That is, the passive cam 4 and the operation cam 7 move in a relative direction.

When the operation cam 7 is moved backward, the arm 9 is moved.
The die 11 at the tip of the front die moves forward, and the front standing wall 1a of the lower die 1
, And abuts the surface of the workpiece W at the hole punching position.

On the other hand, the punch 5 at the front end of the advancing passive cam 4 advances toward the die 11 fitted in the hole 13 of the front upright wall 1a of the lower die 1, and FIG. As shown by, the workpiece W is punched at the bottom dead center of the upper die. At this time, the scrap S is pushed by the punch 12 and remains in the hole of the die 11.

After the workpiece W has been pierced at the bottom dead center of the upper mold, the upper mold rises toward the top dead center, whereby the active cam 3 is separated from the passive cam 4 and the operating cam 8. I do. As a result, the passive cam 4 is moved backward by the return spring 6 to the retracted end, and the operating member 7 is moved forward by the return spring 10 to the forward end.

When the operating member 7 moves forward, the die 11 at the tip of the arm 9 moves backward and comes out of the hole 13 of the front wall 1a of the lower die 1. The hole punch 5 comes out of the die 11 by the backward movement of the die 11 and the backward movement of the passive cam 4.

When the upper die rises to the top dead center, the state shown in FIG. 1 is reached, and the die 11 abuts on the rear wall 1b of the lower die 1, and the pushing pin 12 fixed to the rear wall 1b is pushed. Die 1
The scrap S remaining in the hole of the die 11 through the hole 1 is reliably pushed out and falls into a scrap storage box (not shown) installed below the lower die 1.

[0018]

As described above, according to the present invention, the scrap from the hole of the work remaining in the hole of the die can be reliably pushed out by the extrusion pin by the retreating movement of the die at the top dead center of the upper die. This has the advantage of solving the problem that the scrap is clogged with the die.

[Brief description of the drawings]

FIG. 1 is a sectional view of an original position state of a punching apparatus according to the present invention.

FIG. 2 is a cross-sectional view of the punching device according to the present invention in a punched state.

FIG. 3 is a detailed sectional view of a main part of the present invention.

FIG. 4 is a view taken in the direction of arrow A in FIG. 3;

FIG. 5 is a cross-sectional view of a main part of a conventional punching apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Lower mold 1a Front wall 1b Back wall 3 Active cam 4 Passive cam 5 Hole punch 6 Return spring 7 Operating member 8 Operating cam 9 Arm 10 Return spring 11 Die 12 Push pin 13 Hole

Claims (1)

[Claims] 1. An extruding pin which is provided on a lower die, an extruding pin, a die which penetrates the extruding pin, and an operating member provided with an operating cam, which is movable forward and backward, comprising a punching punch corresponding to the die. The upper die is provided with an active cam that abuts on the operating cam and the passive cam to move the operating member and the passive cam in a relative direction. To move the die forward to the punching punch, and to move the passive cam forward to advance the punching punch toward the die to punch a workpiece. And the passive cam is moved backward, and the pushing pin pushes out and removes the scraps remaining on the die by the pushing pin when the die is retracted by the forward movement of the operating member. Drilling equipment characterized.