JPS61216819A - Edge bending device - Google Patents

Abstract

PURPOSE:To enable to bend an edge part by pressing in a direction differing from the direction of pressing with an upper die by abutting a cam on a moving body and moving the cam toward the work side as the upper die body moves down and turning a yoke using a pressing part. CONSTITUTION:A positioning pad 11 presses and fixes the work W on a setting plane 9 in accordance with down movement of the upper die body 4 and a cam 22 abuts on a moving body 19 to move the body 19 toward a supporting projection part 2 side, against a return spring 20. Further, the yoke 24 is turned counterclockwise by a roller 29 abutting on a pressure receiving part 28 and pushing down the part 28. A bending die 30 bends backward the preliminarily bent edge part 6a toward the edge side of the 1st plate material 5 and presses the 2nd edge bending part 8. That pressing force is received by a receiving die 23 abutting on the top surface of the bending part 8, which is held between the receiving die 23 and the bending die 30 and is bent.

Description

Detailed Description of the Invention A6 Purpose of the Invention (1) Industrial Application Field The present invention relates to a structure in which plates are overlapped with each other, and the edge of one plate is bent so as to wrap around the edge of the other plate. The present invention relates to an edge bending device for a workpiece having an edge bending portion that is temporarily bent.

(2) Conventional technology Conventionally, as an edge bending device for such a work, the workpiece is placed on a lower die with the other plate facing down, and the upper die presses the temporarily bent edge of the other plate from above. Those that are bent are generally used.

(3) Problems to be Solved by the Invention However, there is an edge bending portion where the edge of one plate is bent so as to wrap it around the other plate, and an edge bending portion where the edge of the other plate is bent so as to be wrapped around the other plate. In the case of a workpiece having a bending area, the direction of suppression is opposite at both bending portions, so a conventional edge bending device requires a step of reversing the workpiece. Furthermore, since the surface of the plate material that is received by the lower die is less likely to be damaged, depending on the workpiece, there may be restrictions on its posture during edge bending.

The present invention has been made in view of the above circumstances, and enables the green bending process of the green bending part by pressing in a direction different from the pressing direction by the upper mold, giving flexibility to the posture of the workpiece, The purpose is to provide edge bending that reduces the number of processes.

B1 Structure of the invention (1) Means for solving the problem The device of the present invention includes:
a lower mold body having a support protrusion on which a workpiece can be positioned and placed with one plate facing down and the four edge bent parts protruding to the side; an upper mold body that can be raised and lowered above the lower mold body; a mold body; a positioning pad that is movable vertically relative to each other within a regulated range, is supported by the upper mold body, is biased downward by a spring, and can come into contact with the workpiece on the support protrusion; a movable body that is movable in a direction along the upper surface of the edge bending portion, supported on the lower mold body and biased by a spring in a direction away from the edge bending portion; a yoke supported by the upper mold body; a cam provided on the upper mold body to move the movable body closer to the edge bending portion side in accordance with the descent of the upper mold body; a cam provided in the upper mold body and in response to the descent of the upper mold body; a pressing portion that rotates the yoke; a receiver that is fixed to the movable body and can come into contact with the upper surface of the edge bending portion; and a bending die that can abut the edge bending portion from below.

(2) Operation: As the die body descends, the workpiece is pressed and fixed by the positioning pad, and then, as the moving body moves, the die comes into contact with the top surface of the edge bending part, and the yoke rotates, causing the workpiece to be bent. The die contacts the edge bending portion from below, and the edge of the other temporarily bent plate is pressed and bent.

(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 work W has a first edge bending part T on the outer peripheral edge side where the edge of the first plate material 5 wraps the edge of the second plate material 6, and a first edge bending part T on the outer peripheral edge side where the edge of the second plate material 6 wraps the edge of the first plate material 5. A second edge bending portion 8 on the inner peripheral edge side that wraps around the edge.
The bending process of the first edge bending part T has already been completed before the edge bending process by this edge bending device 1, and the second edge bending process is completed.
The edge bending portion 8 is bent by the edge bending device 1. At this time, in the second edge bending portion 8, the edge 6α of the second plate 6 is in a temporarily bent state bent at a substantially right angle toward the first plate 5 side.

The lower mold body 3 is integrally provided with a support protrusion 2 having a rectangular cylindrical 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 formed. Moreover, the size of this mounting surface 9 is such that the workpiece W
The second R bent portion 8 is set to such an extent that it protrudes inward when it is placed. Furthermore, a positioning member 10 that protrudes above the placement surface 9 and receives the outer edge of the workpiece W is fixed to the upper portion of the outer surface of the support projection 2 .

A positioning pad 11 is supported by the upper die main body 4 at a position corresponding to the support protrusion 2 so as to be relatively movable up and down. That is, at a position above the support protrusion 2, the upper mold body 4 is provided with a hole 12 that opens downward.
A support 13 is slidably connected to 2, and a positioning pad 11 is fixed to the lower part of the support 13. A regulation groove 14 extending vertically is provided on the side surface of the support body 13, into which the tip of a stopper bolt 15 screwed onto the upper mold body 4 is fitted.

Therefore, the support body 13 and the positioning pad 11 are
The stopper bolt 15 is vertically movable relative to the upper mold body 4 within the range in which it abuts both upper and lower ends of the regulation groove 14 .

Moreover, a spring 16 is interposed between the support body 13 and the upper closed end of the hole 12, and the support body 13 and the positioning pad 11 are urged downward by the spring force of the spring 16. Further, on the lower surface of the positioning pad 11, a pressing surface 17 corresponding to the upper surface of the workpiece W on the support protrusion 2, that is, the surface shape of the second plate member 60 is provided.

A slide base 18 having an upper surface parallel to the upper surface of the second edge bent portion 8 of the workpiece W on the support projection 2 is provided on the inner side of the support projection 2 in the lower die main body 3. The movable body 1 is slidable on the slide base 18.
9 is arranged. Moreover, a first return spring 20 is interposed between the movable body 19 and the lower die main body 3, and the movable body 19 is spring-biased in a direction away from the workpiece W on the support protrusion 2. .

On the side of the movable body 19 opposite to the workpiece W, there is a cam slipper 2 that is inclined toward the workpiece W as it goes upward.
1 is provided, and a cam 22 that can come into contact with the cam slipper 21 is provided on the upper die main body 4. As a result, when the upper die main body 4 descends, the cam 22 comes into sliding contact with the cam slipper 21, and the movable body 19 is forcibly moved toward the workpiece W against the spring force of the first return spring 20.

A die 23 is provided in a portion of the movable body 19 closer to the workpiece W, and when the movable body 19 moves closer to the workpiece W, the die 23 is inserted into the upper surface of the second green bent portion 8. comes into contact with.

A yoke 24 is swingably supported on the movable body 19 via a horizontal pivot 25 . That is, the yoke 24 is basically formed in a substantially C-shape open toward the workpiece W, and its upper portion is pivoted to the upper portion of the movable body 19 via the pivot shaft 25 . Between this yoke 24 and the moving body 19, a second
A return spring 26 is interposed, and this second return spring 26
The spring force urges the yoke 24 to rotate clockwise in FIG. Further, a stopper 2T that can come into contact with the yoke 24 is provided on the movable body 19 in a protruding manner, and the yoke 24 can rotate clockwise in FIG. 1 until it comes into contact with the stopper 2γ.

On the other hand, a pressure receiving part 28 is provided on the upper part of the yoke 24, and a roller 29 as a pressing part that can come into contact with the pressure receiving part 28 is provided on the upper die main body 4.

As a result, the upper die main body 4 descends and the roller 29 moves to the pressure receiving part 2.
8 is pushed down, the yoke 24 is moved to the second return spring 26
The lower part of the yoke 24 rotates counterclockwise in FIG. 1 against the spring force of
approach from below.

A bending die 30 is fixed to the lower part of the yoke 24, and when the yoke 24 is pressed down and rotated by the roller 29 as described above, the bending die 30
It can come into contact with the second edge bending part 8 of from below.

The positioning pad 11, the receiving die 23, and the bending die 30 are respectively disposed corresponding to one side of the rectangular workpiece W, and the moving body 19, yoke 24, cam 22, roller 29, etc. They are arranged corresponding to one side of the workpiece W, respectively. In addition, in FIG. 1, only the part corresponding to one side of the workpiece W is shown.
Portions corresponding to other sides are omitted.

Next, to explain the operation of this embodiment, the workpiece W is placed on the placement surface 9 with the first plate material 5, which is the outer surface of the tailgate, facing downward, and in this state, the second edge bending portion 8 is The support protrusion 2 also protrudes inward.

Next, when the upper mold body 4 is lowered, the positioning pad 11 first comes into contact with the upper surface of the workpiece W, as shown in FIG.
As the upper die main body 4 further descends, the positioning pad 11
The workpiece W is pressed against the mounting surface 9 by the spring 16 and fixed.

Further, as the upper die main body 4 descends, the cam 22 moves to the movable body 19.
The movable body 19 is moved toward the support protrusion 2 against the spring force of the first return spring 20 . Further, the roller 29 contacts and presses down the pressure receiving portion 28, so that the yoke 24 rotates counterclockwise in FIG. Therefore, the bending die 30 presses against the second edge bending part 8 while folding back the edge 6α, which has been bent in advance, toward the edge side of the first plate material 5, and the pressing force is applied to the second R bending part 8.
The receiver that comes into contact with the upper surface of is received by the die 23.

In this way, the second edge bending portion 8 is pressed between the die 23 and the bending die 30, and the second edge bending portion 8 is bent.

Thereafter, by raising the upper mold body 4, the positioning pad 11 is raised, and the cam 22 and roller 29 are also raised, so that the movable body 19 is separated from the support protrusion 2 by the spring force of the first return spring 20. The yoke 24 moves toward the stopper 2 due to the spring force of the second return spring 26.
Rotate clockwise until it touches point 7. Thereupon, the workpiece W after machining can be removed from the mounting surface 9.

In the manner described above, the second edge bending portion 8 can be edge bent in the opposite direction to the pressing direction by the upper die main body 4. Therefore, the work W after the edge bending of the first edge bending portion 7 can be supplied to the edge bending device 1 and processed without being reversed, and the reversing step is omitted.

In the above embodiment, the edge bending device 1 is described which performs the edge bending process on the workpiece W whose first edge bending part 7 has already been edge bent. This is the part where edge bending is possible, and the first
According to the present invention, it would also be possible to easily construct a structure in which the bending of the second edge bending portions γ and 8 is performed simultaneously. .

C8 Effects of the Invention As described above, according to the present invention, as the upper mold body descends, the cam is brought into contact with the movable body and moved toward the workpiece, the yoke is rotated by the pressing part, and the receiver is moved toward the die. Since the bending die can be brought into contact with the upper surface of the edge bending part and pressed against the edge bending part from below, the green bending part can be bent from the direction opposite to the direction in which the upper mold body is suppressed. The degree of freedom in the posture of the workpiece is increased, the reversing process can be omitted, the process can be reduced, and equipment costs can be reduced.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and 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, 8...
Edge bending portion, 11... Positioning pad, 19... Moving body, 22... Cam, 23... Receiving die, 24...
Yoke, 29...Roller as a pressing part, 3 leaves...Bending die, W...Work Figure 1 Figure 2

Claims (1)

[Claims] In an edge bending device for a workpiece, which is formed by overlapping plate materials and has an edge bending portion where the edge of the other plate material is temporarily bent so that the edge of one plate material is bent so as to wrap around the edge of the other plate material,
a lower mold body having a support projection on which a workpiece can be positioned and placed with the one plate facing down and the bent edge portion protruding laterally; an upper mold body that is movable up and down above the lower mold body; a mold body; a positioning pad that is movable vertically relative to each other within a regulated range, is supported by the upper mold body, is biased downward by a spring, and can come into contact with the workpiece on the support protrusion; a movable body movable along the upper surface of the edge bending portion, supported on the lower mold body and biased by a spring in a direction away from the edge bending portion; a yoke to be supported; a cam provided on the upper mold body to move the movable body closer to the edge bending portion side in accordance with the descent of the upper mold body; a yoke provided in the upper mold body in response to the descent of the upper mold body; a receiving die that is fixed to the movable body and can come into contact with the upper surface of the edge bending portion; a receiving die that is fixed to the yoke and causes the edge bending to rotate according to the rotation operation by the pressing portion of the yoke; An edge bending device comprising: a bending die that can be brought into contact with the portion from below.