JPS609524A - Press bending device - Google Patents

Abstract

PURPOSE:To take out easily a workpiece from a punch by moving the workpiece along the recessed part of the punch when the punch and a die leave the workpiece, in bending a workpiece having a projecting part. CONSTITUTION:When a punch 4 is displaced to the upper side to depart from a die 2, a roller 15 is displaced along the cam surface 16 to displace a pressing piece 6 closer to the punch side against the spring force of a spring 8, and a guiding part of the piece 6 moves also along the side part of punch 4. By displacing further the punch 4 to the upper side, the pressing part of a pressing piece 6 is displaced while pressing the side face of a workpiece 1 to the right side. In this way, a projecting part of the workpiece 1 slips into a reliefing recess 13, and then the workpiece 1 is released from the punch 4 to fall downward.

Description

[Detailed Description of the Invention] Technical Field The present invention relates to an apparatus for press bending using a punch and a die, and is particularly suitable for bending a workpiece having a protrusion. This invention relates to a press bending device that can perform bending operations.

BACKGROUND TECHNOLOGY In order to bend a workpiece metal in which a protrusion is formed by burring a thin metal sheet, conventionally, the protrusion is interposed between a punch and a die to bend the workpiece after burring. The work will be difficult as it will collapse.

Purpose An object of the present invention is to provide a press bending device that press-bends a workpiece having a protrusion and allows the workpiece to be easily taken out from a punch. be.

Embodiment FIG. 1 is a front view of a part of an embodiment of the present invention, in which a workpiece 1 t''N is used as a product as shown in FIG. 2 using the sound of this press bending machine. The press bending device includes a punch 4 that is reciprocated up and down in FIG. 1 by a die 2 and a ram 8 provided at a fixed position.
including. Workpiece bent by punch 4 and die 2! is pushed out to the right in FIG. 1 by the pressing piece 6 of the pressing means 5. As shown in FIG. 8, the corrugated workpiece 1 is made of metal, and is previously burred to form protrusions 7.8 before press bending. This workpiece 1 is bent in mutually opposite directions with folds indicated by reference numerals 9.10. The punch 4 has a protrusion 7.
Recesses 11° and 12 are formed to accommodate 8. This recess 1
2 extends perpendicularly to the vertical direction of FIGS. 1 and 4 of the punch 4, that is, in the horizontal direction of FIG. 1, over the entire width of the side portions 4a, 4b of the punch 4. In Uko Punch 4, 11111 parts 4a and 4b,
A relief recess 13 facing the recess 11.12 is formed.

Therefore, as shown in FIG.
As a result, the workpiece 1 is folded into the fold 9.10.
In addition, the protrusions 7 and 8 are not damaged by the punch 4 and the die 2.

The punch 4 is displaced and driven upward of the die 2 in FIG. 1 by the action of the ram 8, and the state in which the punch 4 is separated from the die 2 is shown in FIG. Projection 7 of workpiece 1
．． 8 is fitted into the recesses 11 and 12 of the punch 4,
Therefore, the workpiece l can be displaced upwardly in FIGS. 1 and 6 together with the die 2. The state in which the corrugated workpiece l is integrated with the punch 4 is shown in Figure 7 as %,
Also as shown.

The corrugated workpiece 1 is integrally attached to the punch 4 as shown in FIGS. It will be done. This suppressing means 5 includes a roughly U-shaped suppressing piece 6 as clearly shown in FIG. A roller 15 as a follower having an axis perpendicular to the vertical displacement direction of the ram 3 in FIG.
and a spring 18 that elastically biases the cam surface 16. The cam 17 is fixed to the die 2 by a support member 19.

As clearly shown in FIG. 9, the six pressing pieces have suppressing portions 6a and 5b extending along both cylinders 1 of the punch 4, 4a and 4bKa. The ends of the pressing parts 6a and 6b are the end surface 1a of the workpiece 1.

1b can be pressed. The guide portion 60.6a extending along the suppression portions 6a, 6b can be moved along both sides 4a, 4b of the punch 4 above the workpiece l in FIG. The pressing parts 5a and 5b of the piece 6 press the corrugated workpiece 1 against the side parts 4a and 4 of the punch 4.
can move accurately along b.

When the punch 4 is fitted into the die 2 and bending the workpiece 1, the spring 18 of the pressing means 5 displaces the pressing piece 6 from the punch 4 to the left in FIG. .

When the punch 4 is positioned above in FIG. 1 and separated from the die 2, the roller 15 is displaced along the cam surface 16, and thereby the pressing piece 61-! : Resisting the spring force of the spring 18, the punch 411IK is displaced close to the guide portion 5c.

6d moves along the side 4''e4b of the punch 4, and the punch 4 is further displaced upward in FIG.
This causes the projection a7 to be displaced to the right in the figure. S is
The workpiece 1 is fitted into the relief recess 18, and thereby the workpiece 1 is separated from the punch 4 and dropped in the direction f.

Note that another bent portion 2° is formed in the corrugated workpiece 1 by the punch 4 and the die 2, and this protrusion 21
The protrusion 21 also fits into the recess 22 formed in the punch 4, and when the workpiece l is moved by the suppressing piece 6, the protrusion 21 moves into the recess 22.
It displaces to the right in Figure 1 and leaves. In this way, the workpiece 1 can be removed from the punch 4.

effect As described above, according to the present invention, the corrugated product is 4f L.

The protrusion fits into the recess of the punch, and when the punch and die are separated, the rim can be pushed out of the recess by the pressing means.

In this way, prior to bending, a workpiece with a protrusion can be bent with high precision without deforming the protrusion, and the bent workpiece can be automatically removed from the punch. It is possible to remove it.

[Brief explanation of drawings]

Fig. 1 is a front view of a part of an embodiment of the present invention, Fig. 2 is a perspective view of a workpiece l which is a product processed by the press bending apparatus of this embodiment, and Fig. 3 is a bending process. A perspective view of the workpiece 1 with a protrusion 7.8 in front, FIG.
FIG. 5 is a cross-sectional view showing the state in which the workpiece l is being bent, and FIG. 6 is a partial perspective view of the workpiece 1 and the die 2, and FIG. 1, FIG. 7 is a perspective view of the punch 4 in the state shown in FIG. 6, FIG. 8 is a perspective view of the pressing piece 6, and FIG. It is a front view. l...Workpiece, 2...Dice, 4...Punch,
5... Pressing means, 6... Pressing piece, 7.8... Protrusion, 11.12... Recess, 13... Relief recess Agent Patent Attorney Kei Nishi First Department Figure 2 Chapter 7r14

Claims (1)

[Scope of Claims] A punch having a recess on the side for storing a protrusion of a workpiece, and a die that cooperates with the punch, wherein the recess formed in the punch allows movement of the punch or the die. The recess extends across the entire width of the punch in a direction perpendicular to the recess, and is interlocked with the punch or die so that when the punch and die are separated, the workpiece is moved along the extending direction of the recess, and the punch A press bending device comprising a suppressing means for removing a workpiece from the press bending device.