JP2001047157A - Press machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To accurately perform a bending work and a trimming work during the same process. SOLUTION: In the first half of a movement, bending of a work W is performed by pushing a slide cam 13, incorporating an inner slide cam 14, with the first driver cam surface 17 of a cam driver 16, and in the latter half of the movement, a cutting of the work W is performed by pushing the inner slide cam 14 with the second driver cam surface 18 of the cam driver 16. Thus, bending and cutting of the work are not performed at the same time, and accuracy of bending and cutting of the work can be improved respectively.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a press device.

[0002]

2. Description of the Related Art FIG. 5 is a view for explaining the operation of a conventional press bending apparatus, and shows a process chart of bending a work 101. FIG.
In (a), the work 101 is set on the lower die 102 of the press bending apparatus 100. Here, 103 is an upper die of the press bending apparatus 100, and 104 is a press pad.
In (b), the upper die 103 and the press pad 104 of the press bending apparatus 100 are lowered as shown by the arrow b1, and the lower die 1
02 is pressed against the work 101. In (c), the upper die 103 is moved down as indicated by an arrow c1 to move the edge 1 of the work 101.
Bend 01a.

FIG. 6 is a view for explaining the operation of a conventional trimming apparatus, and shows a process diagram of cutting (trimming) of a bent work 111. 1A, a work 1 that has been bent into a lower mold 112 of a trimming device 110.
Set 11 Here, 113 is the trimming device 1
10 upper mold, 114 is press pad, 113a is upper mold 11
Reference numeral 3 denotes a cam surface, reference numeral 115 denotes a slide cam slidably attached to the lower mold 112, and reference numeral 115a denotes a cam surface of the slide cam 115. In (b), the upper die 113 and the press pad 114 of the trimming device 110 are lowered as shown by the arrow b2, and the work 111 is pressed into the lower die 112. In (c), the upper mold 113 is further lowered as indicated by an arrow c2, so that the slide cam 1
The cam surface 115a of the No. 15 is pushed as indicated by an arrow c3, and the slide cam 115 is moved in the direction of approaching the bent work 111 to trim the edge 111a of the work 111.

That is, conventionally, a bending press 100
(See FIG. 5), and the trimming device 11
Since the bending process and the trimming process are performed in separate steps so that the trimming is performed at 0, separate press devices 10
This requires the use of a zero and a trimming device 110 (two devices), which causes an increase in manufacturing equipment and manufacturing costs. Further, after the bending, the bent work 111 must be separately set for trimming.
Workability was getting worse. Further, since separate dies are required for the bending and the trimming, the types of dies increase and the management becomes complicated.

As a technique for solving these problems, for example, Japanese Patent Laid-Open Publication No. Sho 56-77026, "Composite type for press working" is known. FIG. 1 and FIG. 3 (a) and FIG. 3 (b) are shown in FIGS. 8 (a) and 8 (b), respectively. The numbers are renumbered for convenience.

FIG. 7 is a front sectional view of a conventional composite press apparatus.
And a drive cam 124 constituting an interlocking mechanism is attached to the upper mold 122.
, A pad 125 for holding the work 121 is slidably suspended, and a die 127 is attached to the lower mold 126.
A trimming punch 128 is attached to the driven cam 12 and the driven cam 12
9 is attached, and the upper die 122 is moved down so that the vertical bending punch 123 and the die 127
The driven cam 129 is slid by the drive cam 124 while the workpiece 1 is bent, and the workpiece 121 is to be trimmed by the trimming punch 128 and the die 127. Next, a mechanism at the time of processing the work 121 in the composite press apparatus 120 will be described.

[0007]

FIGS. 8 (a) and 8 (b) are views for explaining the operation of the composite press apparatus shown in FIG. 7, and show the steps of bending and trimming the work 121. FIG.
As shown in the lower drawing (b), the front end (lower end) of the work 121 is cut by the trimming punch 128 while the work 121 is bent by the vertical bending punch 123. b3 is the moving direction of the vertical bending punch 123, b4 is the trimming punch 12
8 shows the direction of movement.

By the way, in (a) before reaching (b), when the punch 121 for trimming hits the work 121, the punch 123 for bending is in the middle of descending (arrow a1), so that the edge portion 121a is still in the middle. Are not affected by the bending punch 123. That is, the edge portion 121
a is in a “floating” state from the die 127. Therefore, when the edge portion 121a is pushed by the trimming punch 128 as indicated by the arrow a2, the edge portion 121a is bent as shown by a two-dot chain line. If it is bent, the edge portion 121a does not adhere to the die 127, a sharp cut surface cannot be obtained, and burrs are likely to appear. Like this
With the conventional composite press device 120, it is not possible to obtain a processed product with high accuracy.

Accordingly, an object of the present invention is to provide a press apparatus capable of performing bending and trimming with high precision in the same process.

[0010]

According to a first aspect of the present invention, there is provided a press apparatus for mounting a work, a work holding pad for pressing the work to the work mounting table, and a work holding pad protruding from the work holding pad. A slide cam that advances and retreats toward the edge to bend the edge of the work, a cam surface formed on the back of the slide cam, and an inner slide cam movably incorporated in the slide cam to cut the edge of the work. An inner cam surface formed on the back surface of the inner slide cam, an opening opened on the back surface of the slide cam so that the inner cam surface can be seen from the outside, and a cam which is moved in the pad holding direction of the work holding pad in the first half of this movement. The first driver cam surface that pushes out the inner cam surface and the first cam surface that pushes the inner cam surface further pushes the inner cam surface. Consists of a cam driver having a to second driver cam surfaces, performs bending work by the slide cam in the previous period of movement, and performing cutting work in the inner slide cam late in the mobile.

The work is placed on the work placing table, the work is pressed against the work placing table with the press pad, and the cam driver is moved forward, so that an inner slide cam is built in the first driver cam surface of the cam driver in the first half of the movement. The work is bent by extruding the slide cam and cutting the work by extruding the inner slide cam on the second driver cam surface of the cam driver at a later stage of the movement.

In the first half of the movement, the slide cam incorporating the inner slide cam is pushed out on the first driver cam surface of the cam driver to bend the workpiece, and in the second half of the movement, the inner slide cam is formed on the second driver cam surface of the cam driver. By extruding and cutting the work, the processing accuracy of the bending of the work and the cutting of the work is improved.

[0013] An inner slide cam for cutting the edge of the work is movably incorporated in a slide cam that advances and retreats toward the edge in order to bend the edge of the work, thereby achieving a compact press device.

[0014]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a front sectional view of a press device according to the present invention. The press device 10 includes a work mounting table 11 on which the work W is mounted and a work mounting table 11 on which the work W is mounted.
Work press pad 12 pressed against the work press pad 12 and the edge W1 of the work W protruding from the work press pad 12 to bend the edge W1.
1, a slide surface 13 a formed on the back surface of the slide cam 13, an inner slide cam 14 movably incorporated in the slide cam 13 for cutting the edge W <b> 1 of the work W, While moving in the pad pressing direction of the work holding pad 12, The first driver cam surface 17 that pushes the cam surface 13a and the inner cam surface 14a in the first half of the movement and the opening 13 in the second half of the movement.
b, the cam driver 16 having a second driver cam surface 18 for further pushing out the inner cam surface 14a by intruding the inner cam surface 14a.
And the workpiece W is cut by the inner slide cam 14 in the later stage of the movement.

Here, 25 is a base for supporting the work table 11, 26 is a slope attached to the base 25 to slidably support the slide cam, and 27 is attached to the base 25 to guide the cam driver 16. It is a guide wall.

The work W is, for example, a drawn or bent semi-finished product such as an automobile door panel,
This is a sheet metal that needs to be bent and cut (hereinafter, referred to as “trimming”) of the edge W1 of the work W.
The work mounting table 11 includes a first protrusion 11a for bending the edge W1 of the work W, a second protrusion 11b for trimming the edge W1 of the work W, and a support 1 for supporting the work W.
1c. Work holding pad 12
Is slidably hung on the cam driver 16 corresponding to the upper mold, that is, the cam driver 16 moves forward with the cam driver 16 for a certain section, and after the work W is pressed onto the work mounting table 11, only the cam driver 16 is It is attached to the cam driver 16 so as to be able to move forward.

The slide cam 13 is moved toward the edge W1 of the work W by the first driver cam surface 17 of the cam driver 16 in the first half of the movement to bend the edge W1 of the work W, and 13c is the work. A corner portion for bending the edge W1 of W, and a compression spring 21 for returning the slide cam 13 are provided. The inner slide cam 14 is moved toward the edge W1 of the workpiece W by the second driver cam surface 18 of the cam driver 16 in a later stage of the movement, and performs trimming of the edge W1 of the workpiece W.
4c is a corner portion for trimming the edge W1 of the work W, and 22 is a compression spring for returning the inner slide cam 14. Further, since the inner slide cam 14 that cuts the edge W1 of the work W is movably incorporated in the slide cam 13 that moves forward and backward toward the edge W1 to bend the edge W1 of the work W, the size of the press device 10 can be reduced. Can be.

The cam driver 16 has a first driver cam surface 17 and a second driver cam surface 18. As described above, the first driver cam surface 17 is provided on the inner slide cam 14.
Is moved, and the second driver cam surface 18 moves the inner slide cam 14. Reference numeral 16a denotes a stopper formed on the cam driver 16 for holding the slide cam 13 at a predetermined position when the inner slide cam 14 is slid.

The operation of the press device 10 described above will now be described. FIGS. 2A and 2B are explanatory diagrams of a first operation of the press device according to the present invention. In (a), the work W is set on the support portion 11c of the work mounting table 11. The work holding pad 12 and the cam driver 16 are located above the drawing and are in a standby state.

In FIG. 2B, the work holding pad 12 and the cam driver 16 are moved forward (hereinafter, referred to as “down”) as shown by arrows, and the support portion 11 of the work placing table 11 is moved.
Press the work W against c.

FIGS. 3A and 3B are views for explaining a second operation of the press apparatus according to the present invention. In (a), the cam driver 16 is lowered as shown by the arrow, the cam surfaces 13a and 14a are pushed out by the first driver cam surface 17, and the slide cam 13 and the inner slide cam 14 are moved as shown by the arrow.

In (b), the cam driver 16 is lowered as shown by the arrow, and the slide cam 13 is pushed out together with the inner slide cam 14 as shown by the arrow, and the edge W1 of the work W is bent by the first convex portion 11a and the corner portion 13c. To start.

FIGS. 4A and 4B are views for explaining a third operation of the press device according to the present invention. In (a), the cam driver 16 is lowered as shown by the arrow, and the slide cam 13 is pushed out together with the inner slide cam 14 as shown by the arrow.
The edge W1 of the workpiece W is formed by the first convex portion 11a and the corner portion 13c.
Complete the bending.

In (b), the cam driver 16 is lowered as shown by the arrow, the second driver cam surface 18 is brought into contact with the cam surface 14a from the opening 13b, and the inner slide cam 14 is further moved by the second driver cam surface 18 as shown by the arrow. By extruding, the trimming of the edge W1 of the workpiece W is completed by the second convex portion 11b and the corner portion 14c. At this time, the slide cam 13 is held at a predetermined position by the stopper 16a of the cam driver 16, and the edge W1 of the work W is sandwiched between the corner 13c of the slide cam 13 and the first convex portion 11a of the work mounting base 11. Therefore, the trimming of the edge W1 can be accurately processed.

That is, the press device 10 performs bending of the work W by pushing out the slide cam 13 including the inner slide cam 14 on the first driver cam surface 17 of the cam driver 16 in the first half of the movement, and in the latter half of the movement. Since only the inner slide cam 14 is pushed out from the second driver cam surface 18 of the driver 16 to perform the trimming of the work W, it is possible to improve the bending accuracy of the work W and the trimming of the work W.

In the embodiment, the edge W1 of the work W is trimmed as shown in FIGS. 2 to 4. However, the present invention is not limited to this, and the edge W1 of the work W may be partially cut. . That is, any material that cuts the edge W1 of the work W may be used.

[0027]

According to the present invention, the following effects are exhibited by the above configuration. According to the first aspect of the present invention, the work is placed on the work placing table, the work is pressed against the work placing table with the press pad, and the cam driver is moved forward. The built-in slide cam is pushed out to bend the work, and the work is cut by pushing out the inner slide cam on the second driver cam surface of the cam driver at a later stage of the movement. Therefore, since the bending of the workpiece and the cutting of the workpiece do not proceed simultaneously, it is possible to improve the processing accuracy of the bending of the workpiece and the cutting of the workpiece. In addition, the inner slide cam that cuts the edge of the work is movably built into the slide cam that moves back and forth toward the edge to bend the work edge, so the press device can be downsized and a compact device can be realized. can do.

[Brief description of the drawings]

FIG. 1 is a front sectional view of a press device according to the present invention.

FIG. 2 is a diagram illustrating a first operation of the press device according to the present invention.

FIG. 3 is an explanatory view of a second operation of the press device according to the present invention.

FIG. 4 is an explanatory view of a third operation of the press device according to the present invention.

FIG. 5 is a diagram illustrating the operation of a conventional press bending apparatus.

FIG. 6 is a diagram illustrating the operation of a conventional trimming device.

FIG. 7 is a front sectional view of a conventional composite press device.

FIG. 8 is a diagram illustrating the operation of the composite press device of FIG. 7;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 ... Press apparatus, 11 ... Work mounting stand, 12 ... Work holding pad, 13 ... Slide cam, 13a ... Cam surface, 1
3b: opening, 14: inner slide cam, 14a: inner cam surface, 16: cam driver, 17: first driver cam surface, 18: second driver cam surface.

Claims (1)

[Claims] 1. A work mounting table on which a work is mounted, a work holding pad for pressing the work to the work mounting table, a slide cam which advances and retreats toward the edge to bend the edge of the work protruding from the work holding pad. The cam surface formed on the back of the cam, the inner slide cam movably incorporated in the slide cam to cut the edge of the work, the inner cam surface formed on the back of this inner slide cam, and the inner cam surface An opening opened on the back surface of the slide cam so as to be seen, and a first driver cam surface that pushes the cam surface and the inner cam surface in the first half of this movement while moving in the pad holding direction of the work holding pad and a second half of the movement. A cam driver having a second driver cam surface for further pushing out the inner cam surface by entering the opening. A press apparatus wherein the work is bent by a slide cam in the first half of the movement, and the work is cut by the inner slide cam in the second half of the movement.