JPH0237452Y2 - - Google Patents

Description

[Detailed explanation of the invention] A. Purpose of the invention (1) Industrial application field The invention has a first plate part and a second plate part connected to the first plate part at an angle. In order to correct the first plate portion of a workpiece that has been previously processed and formed from a thin metal plate, a fixed bending die is installed on a base on which the workpiece can be placed, and a second bending die is operated in cooperation with the bending die. A bend punch is provided on an elevating body that can be raised and lowered above the bend die to correct the first plate part, and a second plate part is movably arranged to be pressed between the bend die and the bend punch in response to the lowering of the bend punch. The present invention relates to a mold device for modifying a workpiece, which is provided with a pad for modifying a workpiece.

(2) Prior Art Conventionally, in such a mold device, a pad is generally provided on an elevating body.

(3) Problems to be solved by the invention However, in order to strongly press and correct the first plate between the bend punch and the bend die, the first plate must be opposed to the downward direction of the bend punch. In this case, the second plate part will be placed on the bending die at an angle, and in the case where the pad is fixed to the elevating body, the position of the pad will be lower when the elevating body is lowered. The pressing force per unit area on the second plate part becomes smaller, and when the first plate part is corrected using a bend punch and a bend die, the second plate part becomes the first plate part.
It gets dragged towards the board side. Furthermore, if the second plate part generates springback, if the pad is pressed from above, the tip of the pad may hit the second plate part and cause damage.

The present invention has been developed in view of the above circumstances, and the second plate part is securely held between the pad and the bend die to correct the first plate part, thereby preventing the occurrence of distortion. To provide a mold device for repairing a workpiece which prevents damage even if a second plate part is subjected to spring back.

B. Structure of the invention (1) Means for solving the problem According to the invention, there is provided on the base movable in the horizontal direction facing the second plate part of the workpiece on the bending die at an angle. A slider is arranged, and a swinging arm is supported on the base so as to be rotatable around a horizontal axis perpendicular to the direction of movement of the slider, and a pad facing the second plate is fixed to the tip of the swinging arm. The middle part of the swinging arm and one end of the slider are connected, and a spring is interposed between the base and at least one of the slider and the swinging arm to bias the pad in a direction away from the bend die. A first cam that drives the slider toward the other end when descending, and a second cam that drives the swing arm toward the bend die when descending are provided on the elevating body in order to interlock with the vertical movement of the bend punch.

(2) Action When the elevating body is rising, the slider is moving to one end, and the swinging arm is rotating in the direction to move the pad away from the bend die. In this state, the workpiece is placed on the bend die. When the workpiece is placed and the elevating body is lowered, the slider is moved to the other end by the first and second cams, and the swinging arm swings the pad in a direction closer to the bending die, so that the second plate part of the workpiece The first plate portion is firmly held between a bend die and a pad, and then the first plate portion is corrected using a bend punch and a bend die.

(3) Embodiment An embodiment of the present invention will be described below with reference to the drawings. First, in FIGS. 1 and 2, this mold device is used to correct a workpiece W that has been processed and formed in advance. Fixed bend die 1 and
A bend punch 3 provided on an elevating body 2 that can be moved up and down above the bend die 1, a pad 4 that is linked to the up and down movement of the bend die 1, a slider 6 that can be slid on a base 5, and the pad 4 fixed to the tip. and base 5
A pair of swinging arms 7, 7 swingably supported on the
The first cam 8 is provided on the elevating body 2 to drive the slider 6, and the second cam 9 is provided on the elevating body 2 to drive the swing arms 7, 7.

The work W is formed by pressing a thin steel plate in advance, and has a first plate part 10 and a second plate part 11 connected to the first plate part 10 at an angle,
The first plate portion 10 is modified.

On the base 5 are first and second plate parts 10 and 11.
The bending die 1 has a first support surface 12 corresponding to the first plate part 10 and a second support surface 13 corresponding to the second plate part 11 on the upper surface in order to place the workpiece W with the connecting part facing upward. will be erected. On the other hand, above the base 5, an elevating body 2 that is driven up and down by a drive means (not shown) is arranged.
A bend punch 3 for modifying the first plate portion 10 of the workpiece W in cooperation with the support surface 12 is fixedly provided.

A guide hole 14 is bored in the bend die 1 along the horizontal direction facing the second support surface 13 at an angle, and a slide plate 15 is provided on the base 5 through the guide hole 14. It will be done. Moreover, on the slide plate 15, there is a slider 6 that passes through the guide hole 14.
is slidably arranged.

The slider 6 is made up of a vertical part 16 and a horizontal part 17 that are integrally connected in a substantially L-shape. 17 passes through the guide hole 14 and is placed on the slide plate 15. Further, guide frames 18 and 19 are provided on both sides of the bend die 1 on the base 5, and one end of the horizontal portion 17 of the slider 6 is slidably fitted into the guide frame 19, and the other end of the horizontal portion 17 is slidably fitted into the guide frame 19. The end is slidably fitted into the guide frame 18. That is, both guide frames 18 and 19 are formed in a substantially U-shape that opens toward the bend die 1 side, and the slider 6 is guided by these guide frames 18 and 19 and slides on the slide plate 15. .

A guide rod 20 is fixed to the other end of the horizontal section 17 and projects along the longitudinal extension of the horizontal section 17, and the guide rod 20 movably passes through the guide frame 18. Moreover, the guide frame 18 and the horizontal portion 17
A coil spring 2 surrounding the guide rod 20 is provided between the other ends.
1 is compressed, and the spring force of this coil spring 21 biases the slider 6 toward one end of the horizontal portion 17.

A pair of support members 22, 22 are fixed to the base 5 on both sides of the guide frame 19 along the sliding direction of the slider 6, and horizontal support shafts 23, 23 perpendicular to the sliding direction of the slider 6. A pair of swinging arms 7,
The base end of 7 is rotatably supported by support members 22, 22. These swing arms 7, 7 are connected to the support member 2
The intermediate portion of each swing arm 7, 7 is connected to one end of the horizontal portion 17 of the slider 6 via a connection shaft 24 parallel to the support shafts 23, 23.

That is, the connecting shaft 24 is installed horizontally between the intermediate parts of the swinging arms 7, 7.
It is arranged in a connecting groove 25 provided on the top surface of one end of the horizontal portion 17 . The connecting groove 25 is connected to the horizontal portion 1
The width along the longitudinal direction of the slider 6 is larger than the outer diameter of the connecting shaft 24. Therefore, the slider 6 and both swinging arms 7, 7 are arranged so that the width along the longitudinal direction of the slider 6 is larger than the outer diameter of the connecting shaft 24. The movable arms 7, 7 are connected in such a way that they are allowed to swing slightly.

A bend die 1 is installed at the tip of both swing arms 7, 7.
The second plate portion 1 of the workpiece W is placed between the second support surface 13 of the
A pad 4 for pinching 1 is fixedly provided.

At the upper end of the vertical portion 16 of the slider 6, on the first support surface 12 side, a pressure receiving surface 26 is provided that is inclined in a direction that moves away from the first support surface 12 as it goes upward. Also, bend die 1 of pad 4
At the upper part on the opposite side, there is a bend die 1 as it goes upward when the swing arms 7, 7 are in the upright state.
A pressure receiving surface 27 is provided which is inclined to the side.

On the other hand, a first cam 8 having an inclined pressing surface 28 so as to come into sliding contact with the pressure receiving surface 26 of the slider 6 when descending is fixed adjacent to the bend punch 3 on the elevating body 2 . Also, a second cam 9 has an inclined pressing surface 29 so as to come into sliding contact with the pressure receiving surface 27 of the pad 4 when descending.
is supported by the elevating body 2 so as to be movable within a limited range along the direction parallel to the sliding direction of the slider 6, and between the second cam 9 and the elevating body 2,
An elastic body 30 is interposed to urge the second cam 9 toward the bend die 1 side.

Next, the operation of this embodiment will be explained with reference to FIG. do. At this time, the vertical portion 16 of the slider 6 is moving in a direction approaching the bending die 1 due to the spring force of the coil spring 21, and accordingly, both swing arms 7, 7 move toward the pad 4.
is rotating in the direction away from the bend die 1.

When the elevating body 2 is lowered in such a state, the pressing surface 28 of the first cam 8 first touches the pressing surface 2 of the slider 6.
6 , the slider 6 is driven in a direction in which the vertical portion 16 moves away from the bend die 1 . In response to this, the swing arms 7, 7 rotate in a direction to bring the pad 4 closer to the bend die 1, and assume a vertical posture in which the pressing surface 28 of the second cam 9 can be brought into sliding contact with the pressure receiving surface 27.

When the elevating body 2 further descends, the pressing surface 29 of the second cam 9 comes into sliding contact with the pressure receiving surface 27 of the pad 4, and the second
The cam 9 presses the pad 4 toward the bend die 1 while compressing the elastic body 30. As a result, the second plate portion 11 of the workpiece W is held between the second support surface 13 and the pad 4, but since the direction of action of the pad 4 is approximately perpendicular to the second plate portion 11, the second plate portion 11 of the workpiece W is held between the second support surface 13 and the pad 4.
The plate portion 11 is firmly pressed toward the second support surface 13 over its entire surface, and is strongly held between the second support surface 13 and the pad 4.

Next, as the elevating body 2 further descends, the first plate portion 10 of the workpiece W is corrected by the bend punch 3 and the first support surface 12 of the bend die 1, but at this time, the second plate portion 11 is firmly Since the second plate part 11 is positioned, the second plate part 11 will not shift toward the first plate part 10, and correction processing can be performed while preventing distortion from occurring.

Thereafter, as the elevating body 2 rises, the slider 6 and the pad 4 return to their original positions, but at this time, the pad 4 is separated from the second plate portion 11 of the workpiece W in a direction substantially perpendicular to the second plate portion 11. Even if spring back occurs in the second plate part 11, the pad 4
will not be damaged.

C. Effects of the invention As described above, according to the invention, a slider is disposed on the base so as to be movable in the horizontal direction facing the second plate part of the workpiece on the bending die at an angle, and A swinging arm is supported so as to be rotatable around a horizontal axis perpendicular to the direction of movement of the slider, and a pad facing the second plate is fixed to the tip of the swinging arm, and a pad facing the second plate is fixed to the tip of the swinging arm. and one end of the slider are connected, and a spring is interposed between the base and at least one of the slider and the swinging arm to bias the pad away from the bending die, and when the pad is lowered, the slider is A first cam that drives the end side and a second cam that drives the swinging arm toward the bending die when descending are provided on the elevating body to be linked to the vertical movement of the bend punch. By moving the pads in the orthogonal direction, the second plate part can be firmly held, making it possible to perform correction processing without causing distortion on the workpiece, and also to prevent scratches from occurring on the second plate part. can be prevented.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and FIG. 1 is a longitudinal side view before the start of processing, FIG. 2 is a view taken in the direction of the arrow in FIG. 1, and FIG. be. 1... Bend die, 2... Elevating body, 3... Bend punch, 4... Pad, 5... Base, 6... Slider, 7... Swinging arm, 8... First cam, 9
...Second cam, 10...First plate part, 11...Second
Plate portion, 21...Coil spring.

Claims (1)

[Scope of utility model registration request] In order to modify the first plate part of a workpiece, which has a first plate part and a second plate part connected to the first plate part at an angle, and is formed in advance by processing and forming a thin metal plate, A fixed bend die is fixed on a base so that a work can be placed thereon, and a bend punch is provided on an elevating body that can be raised and lowered above the bend die in order to work with the bend die to correct the first plate part. , a workpiece modification mold device comprising a pad movably disposed to sandwich the second plate portion between the bend die and the bend die in response to the lowering of the bend punch; A slider is disposed so as to be movable in a horizontal direction facing the second plate part of the workpiece at an angle, and a swing arm is disposed on the base so as to be movable in a horizontal direction orthogonal to the direction of movement of the slider. A pad facing the second plate part is fixed to the tip of the swinging arm, and the middle part of the swinging arm and one end of the slider are connected, and at least one of the base, the slider, and the swinging arm is supported. A spring is interposed between the first cam and the other end to bias the pad away from the bending die, a first cam that drives the slider toward the other end when it is lowered, and a second cam that drives the swinging arm toward the bending die when it is lowered. A mold device for work correction, characterized in that two cams are provided on an elevating body so as to be interlocked with the elevating and lowering operations of a bend punch.