JP2001179358A - Equipment for piercing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide equipment for piercing with which deburring is done easily when a work is taken out into a direction perpendicular to a punching direction after piercing is performed. SOLUTION: An inserted part 11 of a core bush 10 is pushed into a pipe- shaped work 1, and a penetrating hole 2 is machined for piercing by a punch 7 from a direction perpendicular to the punching direction of the work 1. When those works are under way, burrs protruding toward a direction of an inserted part 11 are made around a penetrating hole 2. When the core bush 10 is moved clockwise, a material for pushing 13 pushes out the work 1 into a direction of an axis that is perpendicular to a punching direction (an opposite direction of the arrow A) after a material for pushing 13, which is fixed but is free to slide into the areas surrounding the inserted part 11, is pushed by a receiving surface 19 of a base block 18 and is moved. As the position of a piercing hole 12 and that of a penetrating hole 2 provided at an inserted part 11 are shifted, burrs are chopped off by a rim of an opening of the piercing hole 12. As a result, it will be easy to take out the work 1 afterward.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a piercing apparatus for a hollow member such as a pipe member, and more particularly to an apparatus for removing burrs generated at the time of piercing so that a product can be easily taken out.

[0002]

2. Description of the Related Art Japanese Utility Model Application Laid-Open No. 61-195,836 discloses that burrs generated at the time of piercing of a cast product are crushed simultaneously with piercing by a part of a piercing die.

[0003]

When the work is extracted in the direction perpendicular to the punching direction, for example, when the work is formed in a pipe shape, burrs projecting inward from the pipe by piercing work with the cored metal bush. This may make it difficult to take out the work. However, in such a case, since the work taking-out direction is orthogonal to the punching direction, the burrs cannot be crushed at the time of punching as in the conventional example. Therefore, it is an object of the present invention to facilitate deburring even in such a case. The term “burr removal” in the present invention means both removal of burrs by cutting or the like and crushing of the burrs so as not to hinder removal of the work.

[0004]

According to a first aspect of the present invention, there is provided a piercing apparatus, wherein a metal core bush is inserted through an opening provided in a hollow work, and the work is inserted from the outside of the work. In an apparatus for piercing with a punch, after the piercing, the workpiece and the core bush are relatively moved in a direction orthogonal to the punch direction to perform deburring, and then the workpiece is extracted from the core bush. It is characterized by the following.

According to a second aspect, in the first aspect,
Equipped with an extruding member that extrudes the workpiece after piercing,
The deburring is performed simultaneously with the pushing of the workpiece by the pushing member.

[0006] A third invention is the above-mentioned second invention, wherein:
The cored bush is supported in such a manner that one end thereof is swingably supported with respect to the base, and the other end is inserted into the hollow portion of the work while the pushing member is slidably supported around the base. The extruding member is configured to slide by swinging.

[0007]

According to the first aspect of the present invention, even if burrs project into the hollow portion of the work by piercing and engage with the metal core bush, the work and the metal core bush are orthogonal to the punch direction after the piercing. Since the burrs are removed by cutting or crushing by moving the burrs relatively in the direction, the work after the piercing can be easily taken out in the direction perpendicular to the punch direction by this deburring step.

According to the second aspect of the present invention, since the extruding member for extruding the work in the direction orthogonal to the punch direction is provided, the extruding member moves the work and the metal core bush relatively in the direction orthogonal to the punch direction. As a result, deburring can be performed simultaneously with the extrusion of the work, and a special device dedicated to deburring can be eliminated.

According to the third aspect of the present invention, the pushing member is slid in the direction perpendicular to the punching direction by swinging the metal core bush, so that the inner burr can be removed and
The work can be swung to a position where the work can be easily taken out, so that work efficiency can be improved.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment will be described below with reference to the drawings. FIG. 1 is a cross-sectional view of a main part of the embodiment device at the time of piercing, FIG. 2 is a diagram showing a state at the time of removal, and FIG. In these figures,
This piercing device is for forming a through-hole 2 in the transverse direction in the side surface of a pipe-shaped work 1, and the work 1 is placed on a bed 5 provided on a base 4,
The punch 7 supported by the punch holder 6 is lowered from above the bed 5 to form the through hole 2.

A pipe hole 3 formed in the axial direction so as to form a hollow portion of the work 1 has an opening at one end through which a metal core bush 1 is inserted.
The insertion portion 11 forming one end side of the workpiece 0 is inserted to prevent the work 1 from being crushed due to piercing. The insertion portion 11 has a shape capable of densely supporting the inside of the portion forming the through hole 2 of the work 1, and a through hole 12 is formed in a portion overlapping with the through hole 2 in a direction orthogonal to the axis, so that the punch 7
Of the bed 5 formed on the axial extension of the bed 5. The relief hole 9 and the through hole 12 are formed to be slightly larger than the outer diameter of the punched portion 8 on the tip side of the punch 7 and the inner diameter of the through hole 2 punched.

An extruding member 1 which is slidable on the inner insertion portion 11 of the metal core bush 10 and is slidable in the axial direction.
3 are attached. The extruding member 13 includes the insertion portion 11.
Has a shaft hole 14 through which the insertion portion 11 is inserted.
Is slidably mounted on the insertion section 11 by penetrating through. A stopper protrusion 15 is formed on the outer periphery of the pushing member 13 so as to protrude outward.

A base 16 at one end of the metal core bush 10
Is swingably attached to a base block 18 formed on the base 4 with a swing center shaft 17. The base 16 protrudes upward above the bed 5, and a part of the side wall forms a receiving surface 19. When the work 1 is attached to the insertion portion 11 and pushed in the direction indicated by the arrow A in FIG. 1, the receiving surface 19 is pushed out at a position where the pushing member 13 is pushed most toward the base block 18 (hereinafter referred to as a retreat position). Member 13
To position the retraction position of the pushing member 13.

At the same time, the receiving surface 19 projects into a swing locus C (FIG. 1) at the retreat position of the pushing member 13 which swings together with the metal core bush 10, and always comes into contact with the pushing member 13. As the core metal bush 10 swings clockwise as shown in FIG. 2, the pushing member 13 is pushed to the left (in the direction indicated by the arrow B) of the drawing by the abutting portion of the receiving surface 19. Has become.

Further, one end of a stopper 20 having a substantially U-shape in FIGS. 1 and 2 is integrated with the base 16,
The other end side forms a stopper projection 21 and the pushing member 1
When the workpiece 3 moves in the direction in which the work 1 is pushed out, the push-out amount is made constant by abutting the stopper projection 15 to restrict the movement of the pushing-out member 13.

As shown in FIG. 2, the amount of stroke S by which the stopper projection 15 moves between the stopper projection 21 and the receiving surface 19 is increased by the pushing member by the contact portion of the receiving surface 19 with the swing of the core bush 10. 13 corresponds to the amount of extrusion when extruded.

Next, the operation of this embodiment will be described. As shown in FIG. 1, when the work 1 is pierced by the punch 7,
The punching portion 8 punches the side surface of the work 1, further penetrates through the through hole 12 of the insertion portion 11, and punches the other side surface of the work 1, and the tip enters the escape hole 9 to release the punched debris. Drop it inside. At this time, as shown in FIG. 3A, a burr 22 projecting into the through hole 12 is formed at an edge of the through hole 2.
Is formed.

Subsequently, after the punch 7 is lifted up and separated from the work 1, as shown in FIG. 2, when the cored metal bush 10 is swung clockwise in FIG. Since the projection 19 projects into the swinging trajectory C of the pushing member 13 at the retracted position, the pushing member 13 is pushed out by the receiving surface 19 that is in contact with the pushing member 13 and slides on the inner insertion portion 11 to the left in the drawing. The stopper projection 15 comes into contact with the stopper projection 21 and stops at a predetermined stroke.

As a result, the work 1 is pushed out of the pushing member 13.
, And is pushed out to the left (in the direction indicated by the arrow B) of the insertion portion 11 as a result, and as a result, it moves relatively to the insertion portion 11 so that the position of the through hole 2 is Shift. Then, as shown in FIG. 3B, the burr 22 is cut by the opening edge of the through hole 12 in the insertion portion 11 and falls into the through hole 12 or is crushed. To be in a deburring state removed so as not to be engaged.

Therefore, if the work 1 is pulled out in the direction of arrow B as it is, it can be easily taken out without being disturbed by the burr 22. In addition, since the work 1 is inclined toward the operator by swinging the metal core bush 10, the work 1 is easily taken out and the workability is improved.

Furthermore, since deburring can be performed by using the pushing member 13, there is no need to provide a dedicated member for deburring, and the structure is simplified. In addition, the pushing mechanism also utilizes the swinging of the metal core bush 10 to push the pushing member 13.
The structure is simple. Therefore, the entire structure can be simple and inexpensive.

The present invention is not limited to the above embodiment, but can be applied and modified in various ways. For example, even if the work is not a pipe, the work is hollow and extends in the direction perpendicular to the punch direction when the work is taken out from the metal core bush. You only need to take it out. Further, the work may be fixed, and the cored metal bush may be moved forward and backward. Also, various types of extruding members and mechanisms are possible.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a main part of an embodiment device at the time of piercing.

FIG. 2 is a diagram showing a state at the time of removal.

FIG. 3 is a diagram showing the principle of deburring.

[Explanation of symbols]

1: Work, 2: Through hole, 5: Bed, 7: Punch, 1
0: cored metal bush, 11: insertion part, 13: push-out member, 15: stopper projection, 17: swing center axis, 18: base block, 20: stopper, 22: burr

Claims (3)

[Claims] An apparatus for inserting a metal core bush through an opening provided in a hollow workpiece and piercing the workpiece with a punch from the outside of the workpiece. A piercing apparatus characterized in that it is configured to move in a direction perpendicular to the direction to perform deburring, and then to remove a work from a metal core bush. 2. An extruding member for extruding a work after piercing, wherein the deburring is performed simultaneously with the extruding of the work by the extruding member.
Piercing apparatus described in 1. 3. The core metal bush is inserted into a hollow portion of the work while one end side is swingably supported with respect to a base, and the other end side is slidably supported with the pushing member around. 3. The piercing apparatus according to claim 2, wherein the pushing member is slid by swinging the metal core bush.