JPS61216818A - Edge bending device - Google Patents

Abstract

PURPOSE:To eliminate a turning over process of a work by pressing the 1st edge bending part from above using the 1st bending die by down motion of an upper die body and abutting the 2nd bending die on the 2nd edge bending part by turning a yoke using a supporting body. CONSTITUTION:A positioning pad 10 positions and fixes a work W on a setting plane 9 by down motion of the upper die body 4. By further down motion of the body 4, a cam 20 is abutted on a roller 19, the 1st yoke 17 turns to a supporting projection part 2 once, and the edge part 5a of the 1st plate material 5 is bent previously toward the inside by a bending punch 14. The supporting body 21 is restrained from moving down because a stopper 28 abuts on a stopper 26 and the body 21 moves up relatively to the body 4, compressing a spring 25. By that movement, the 2nd yoke 32 turns counterclockwise and the 2nd bending die 31 approaches the 2nd edge bending parts 8 upward. Both the 1st and 2nd edge bending parts 7 and 8 are bent when the body 4 downs to the lower limit, so that not turning process of the work W is required.

Description

Detailed Description of the Invention A4 Purpose of the Invention (1) Industrial Field of Application The present invention is directed to a product made of plates that are overlapped with each other, and which is bent so as to wrap around the edge of one plate (the edge of the other plate). A workpiece edge bending device having a first edge bending part in which the edge of the other plate is temporarily bent, and a second edge bending part in which the edge of ten thousand plates is temporarily bent so as to wrap around the edge of the other plate. Regarding.

(2) Prior Art Conventional edge bending devices generally press and bend a temporarily bent edge from above, and are described as having two edge bending portions whose bending directions are opposite to each other. In the case of a workpiece, after the bending process of one edge bending part is completed, the workpiece is turned over and the bending process of the other edge bending part is performed.

(3) Problems to be Solved by the Invention The above-mentioned conventional apparatus requires a step of reversing the workpiece, and also requires separate edge bending devices for one edge bending section and the other edge bending section.

The present invention has been made in view of the above circumstances, and eliminates the need for a step of reversing the workpiece, and simultaneously performs edge bending of both edge bent portions by lowering the upper mold body once.
The purpose of the present invention is to provide an edge bending device that reduces process steps and equipment costs.

B0 Structure of the Invention (1) Means for Solving Problems The device of the present invention has a support capable of positioning and placing a workpiece in a posture with one plate facing down and a second edge bent portion protruding laterally. A lower mold body having a protrusion; An upper mold body that can be raised and lowered above the lower mold body; The upper mold body is movable vertically within a regulated range and supported by the upper mold body, and is attached with a spring toward the bottom. a positioning pad capable of contacting the work on the support protrusion; a first bending die fixed to the upper mold body for contacting and bending the first edge of the work from above; a support that is relatively movable up and down within a regulated range and is supported by the upper mold body and biased downward by a spring; a receiving die that can be abutted from; a yoke that is rotatable around a horizontal axis and supported by a support; abutted against the yoke in response to relative upward movement of the yoke with respect to the upper mold body;
The yoke includes a pressing part for rotationally driving the yoke; and a second bending die fixed to the yoke so as to abut the second edge bending part from below when the yoke is rotated by the pressing part.

(2) Operation: As the mold body descends, the workpiece is pressed and fixed by the positioning pad, and then the first bending die bends the first edge, and the yoke is rotated by the pressing part. The second edge bending portion is pressed between the upper receiving die and the lower second bending die to perform edge bending of the second edge bending portion.

(3) Embodiment An embodiment of the present invention will be described below with reference to the drawings. First, in FIG.
A fixed lower mold main body 3 having a supporting protrusion 2 for positioning and mounting the mold, and an upper mold main body 4 which is driven up and down by a driving means (not shown) above the lower mold main body 3.

The workpiece W is for forming, for example, a tailgate of a car, and is made up of a first plate material 5 which is press-molded in advance and which will be the outer side of the tailgate, and a second plate material 6 which will be the inner side of the tailgate. The parts are welded together to form a rectangular shape. Moreover, this workpiece W has a first edge bent portion γ on the outer peripheral edge side where the green portion 5α of the first plate material 5 wraps the edge of the second plate material 6, and an edge portion 6α of the second plate material 60.
and a second edge bent portion 8 on the inner peripheral edge side that wraps around the edge of the first plate material 5. The edge 5a of the first plate material 5 is pre-bent at the first edge bending portion T, and the second edge bending portion 8
The edge 6α of the second plate member 6 is pre-bent.

The lower die main body 3 is integrally provided with a support protrusion 2 having a rectangular cross section and projecting upward, and a support protrusion 2 having a shape corresponding to the surface shape of the first plate material 50 is provided on the upper surface of the support protrusion 2. A placing surface 9 is provided. Moreover, the size of this mounting surface 9 is such that the workpiece W
The second edge bent portion 8 is set to such an extent that the second edge bent portion 8 protrudes inward when it is placed.

A positioning pad 10 is supported by the upper mold body 4 at a position above the workpiece W on the support projection 2 so as to be relatively movable up and down. That is, this positioning pad 10 is fixed to the lower end of a guide rod 11 that is slidably fitted to the upper mold body 4 to allow sliding movement within a regulated range, and the positioning pad 10 is fixed to the lower end of the guide rod 11 that is slidably engaged with the upper mold body 4. A coiled spring 12 surrounding the guide rod 11 is interposed. The spring force of the spring 12 urges the positioning pad 10 downward.

A first bending die 13 is fixed to the upper mold body 4 outside the positioning pad 10 and is capable of coming into contact with the first edge bending part 7 of the workpiece W on the support protrusion 2 from above.

Here, the edge 5α of the first plate material 5 at the first edge bending portion γ
has been temporarily bent, but the temporarily bent state is not such that the edge 5α can be bent when the first bending die 13 is vertically lowered from above, as shown in FIG. Therefore, a bending bunch 14 is used to preliminarily bend the edge 5α so that the edge 5α can be bent with the first bending die 13.
are arranged on the outer side of the support protrusion 2.

This bending bunch 14 is fixed to the upper part of the support protrusion 2 side of the first yoke 1T, which is swingably supported by a bracket 15 provided on the lower die main body 3 via a horizontal shaft 16.
A first return spring 18 is interposed between the bracket 15 and the first yoke 17. This first return spring 18 moves the first yoke 17 clockwise in FIG.
The first yoke 17 is rotated in a direction away from the workpiece W, and the clockwise rotation of the first yoke 17 is regulated by a stopper (not shown).

A roller 19 is pivotally supported as a cam follower on the upper part of the first yoke 17 on the side opposite to the support protrusion 2, and the first yoke 17 is rotated once in the clockwise direction in FIG. 1 by contacting this roller 19. After this, a cam 20 is integrally provided which allows further rotation in the counterclockwise direction. This cam 2
0, the first bending die 13 contacts the o-roller 19 before contacting the first edge bending portion 7, and when the upper mold body 4 descends, the cam 20 contacts the roller 19, and the first bending die 13 contacts the o-roller 19. The yoke 1T first rotates toward the supporting protrusion 2, and the bending bunch 14 pushes and bends the edge 5α inward.

Next, the first yoke 17 is rotated clockwise by the spring force of the first return spring 18, and the bending bunch 14 is retracted outward. Therefore, in the first edge bending part 7, the first bending die 1
3 is brought into contact with the edge 5α by a bending bunch 14, and then the edge 5α is bent by a first bending die 13.
can be bent.

A support body 21 is supported by the upper mold body 4 at a position corresponding to the inner peripheral edge of the workpiece W on the support protrusion 2 so as to be relatively movable up and down. That is, the upper mold body 4 has a hole 2 opened downward.
2 is provided, and the support body 21 is slidably fitted into this hole 22. Moreover, the slide base 23 is attached to the side of the support body 21.
A slide base 23 is provided on the side of the hole 22.
A slide base 24 is provided which slides into contact with the support body 21, thereby facilitating vertical movement of the support body 21.

Between the upper part of the support body 21 and the upper closed end of the hole 22,
A spring 25 is interposed, and the spring force of the spring 25 urges the support body 21 downward. Moreover, a regulating groove 26 extending vertically is provided on the outer surface of the support body 21, and a stop pole 27 is screwed onto the upper mold body 4.
The tip fits into the regulation groove 2G. Therefore, the support body 21 is vertically movable relative to the upper mold body 4 within the range where the stop poles 27 abut against both the upper and lower ends of the regulation groove 26 .

A stopper 28 is integrally provided on the inner surface of the support body 21 and extends inwardly through one side wall of the hole 22 and is further bent downward.
A stopper 29 projecting upward is provided at a position corresponding to 8. Therefore, the support body 21 can be lowered until the stopper 28 comes into contact with the stopper 29.

On the other hand, a receiving die 30 that can come into contact with the upper surface of the second edge bending part 8 is fixed at the lower part of the support body 21, and this receiving die 30 is allowed to come into contact with the stoppers 28 and 29 and move downward. When the lowering of the support body 21 is restricted, the support body 21 comes into contact with the upper surface of the second edge bending portion 8.

A second bending die 31 that comes into contact with the second edge bending part 8 from below and pinching the second edge bending part 8 with the receiving die 30 is fixed to the second yoke 32. The upper part of 32 is supported by a bracket 34 via a horizontal support shaft 33,
Bracket 34 is fixed to support body 21. That is, the second yoke 32 is supported by the support body 21 so as to be swingable around the horizontal axis.

A second return spring 35 is interposed between the stopper 28 on the support body 21 and the second yoke 32. In other words, the second bending die 31 is urged to rotate in the direction away from the second edge bending portion 8 .

On the other hand, a pressure receiving part 36 facing upward is provided on the side of the second yoke 32 opposite to the support protrusion 2, so that the support body 21 moves upward relative to the upper mold body 4. A roller 3T serving as a pressing portion that can sometimes come into contact with the pressure receiving portion 36 is pivotally supported by the upper die main body 4.

When the roller 37 presses the pressure receiving part 36 downward, the second yoke 32 rotates counterclockwise in FIG. 1 against the spring force of the second return spring 35, and the second bending die 31 rotates from below. 2. Moves close to the edge bending part 8.

The positioning pad 10, the first bending die 13, the bending punch 14, the receiving die 3o, and the second bending die 31 are respectively arranged corresponding to one side of the rectangular workpiece W. Bracket 15° 1st yoke 17, cam 2
o, the support body 21, the second yoke 32, the roller 37, etc. are also arranged corresponding to one side of the workpiece W, respectively. In FIG. 1, only a portion corresponding to one side of the workpiece W is shown, and portions corresponding to other sides are omitted.

Next, the operation of this embodiment will be explained. When the workpiece W is edge bent, the workpiece W is placed on the mounting surface 9 with the first plate material 5, which is the outer surface side of the tailgate, downwardly. The second edge bending portion 8 projects inwardly from the support protrusion 2 .

Next, when the upper die main body 4 is lowered, the positioning pad 10 first comes into contact with the upper surface of the workpiece W, as shown in FIG.
As the upper die main body 4 descends, the spring 12 is contracted to increase the spring force, and the workpiece W is positioned and fixed on the mounting surface 9 by the positioning pad 1o that is pressed against the large spring force.

When the upper mold body further descends, the cam 2o moves to the roller 19.
, the first yoke 17 once rotates toward the supporting protrusion 2 and then returns to its original position, and the edge 5α of the first plate 5 at the first edge bending portion 7 is preliminarily inwardly moved by the bending punch 14. The bending punch 14 is then retracted outward.

Further, the support body 21 descends in accordance with the descent of the upper mold body 4, but the stopper 28 comes into contact with the stopper 29, so that the downward movement is restricted, and as the upper mold body 4 further descends, the support body 21 springs. While shrinking 25, the upper mold body 4
Move upward relative to. As a result, the roller 37
contacts the pressure receiving portion 36, and the second yoke 32 rotates counterclockwise.

Therefore, the second bending die 31 approaches the second edge bending portion 8 from below.

When the upper mold body 4 descends to the lowest position, the edge 5α of the first plate 5 is bent by the first bending die 13 at the first edge bending portion 7, and the edge 5α of the second plate 60 is bent at the second edge bending portion 8. 6α is bent by the second bending die 31.

After that, by raising the upper mold body 4, the support body 2
1 is first moved downward relative to the upper mold body 4, and the second yoke 32 is returned to its original position by the spring force of the second return spring 35.
The second bending die 31 separates from the second edge bending portion 8 . Further, the first bending die 13 rises together with the upper mold body 4 and separates from the first edge bending portion 7 . Therefore, the workpiece W after machining can be removed from the mounting surface 9.

In this way, by lowering the upper mold body 401 times, the bending process of the first and second edge bending parts 7 and 8 having mutually different bending directions can be performed at once. Therefore, the step of reversing the workpiece W, which was conventionally required, becomes unnecessary.

Note that the first yoke 17, the bending punch 14, and the cam 20
etc. are omitted when there is no need to preliminarily bend the edge 5α of the first edge bending portion T.

C0 Effects of the Invention As described above, according to the present invention, the first bending die presses and bends the first edge bending portion from above as the upper die body descends &ζ, and the support is bent upward with respect to the upper die body. Due to the relative movement of Bending of both edge bending parts with different angles can be performed at the same time by lowering the upper mold body once, eliminating the need for a workpiece reversal process and requiring only one edge bending device, resulting in a significant reduction in equipment costs. do.

[Brief explanation of drawings]

The box shows one embodiment of the present invention; FIG. 1 is a longitudinal cross-sectional view of the main part of the apparatus of the present invention before operation, and FIG. 2 is a longitudinal cross-sectional view of the main part of the apparatus of the present invention during operation. DESCRIPTION OF SYMBOLS 1... Edge bending device, 2... Support protrusion, 3... Lower die main body, 4... Upper die main body, 5.6... Plate material, 5a, 6
α... Edge, 7... First edge bending part, 8... Second edge bending part, 1o... Positioning pad, 13... First bending die, 21... Support body, 30... receiving die, 31
...Second bending die, 32...Yoke, 37...Roller as a pressing part, W...Work

Claims (1)

[Claims] A first edge bending part in which the edges of one plate are temporarily bent so that the edges of one plate are bent to wrap around the edge of the other plate, and the edges of the other plate are bent to wrap around the edge of the other plate. In a workpiece edge bending device having a second edge bending part in which the edge of one plate material is temporarily bent, the workpiece is placed in a position with the one plate material facing down and the second edge bending part protruding laterally. A lower mold body having a support protrusion on which a workpiece can be positioned; an upper mold body that can be raised and lowered above the lower mold body; and is spring-biased downward.
a positioning pad that can come into contact with the workpiece on the support projection; a first bending die that is fixed to the upper mold body so as to come into contact with a first edge bending part of the workpiece from above and bend the edge; a support that is relatively movable up and down within a range and is supported by the upper mold body and biased downward by a spring; fixedly installed at the bottom of the support and abuts the second edge bending portion from above; A receiving die; A yoke rotatable around a horizontal axis and supported by a support body; A yoke that comes into contact with the yoke and drives the yoke rotationally in response to relative upward movement of the yoke with respect to the upper mold body. An edge bending device comprising: a pressing portion; and a second bending die fixed to the yoke so as to abut the second edge bending portion from below when the yoke is rotated by the pressing portion.