JP2000210729A - Press device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a press device capable of precise press working with a metallic mold such as punch, or die, arranged to an upper die and a lower die by preventing the vibration in the lateral direction of an upper die pressed/ descended with a shank lower end. SOLUTION: A support point 60 having a degree of bending freedom in the surrounding 360 deg. direction is arranged to the intermediate part of the shank 30 vertically movably supported to a guide. A shank 30 lower end is bulged in a sphere, an upper die 20 upper face part, where the shank 30 lower end is pressed, is formed into a flat shape, and the shank 30 lower end is brought into press contact with the upper die 20 upper face part in a point contact state. When the shank 30 is vibrated in the lateral direction, the intermediate part of the shank 30 is bent in an appropriate direction at an appropriate angle around the support point in conformance with a vibration direction and its vibration quantity. Thus, the lateral direction vibration of the shank 30 is absorbed by the support point.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a press apparatus for performing precise press working on a workpiece such as a lead frame.

[0002]

2. Description of the Related Art As the above-mentioned press apparatus, there is an apparatus as shown in FIG. In this device, around the column-shaped guide posts 12 and 14 erected on the left and right of the lower mold 10,
The upper mold 20 is supported movably up and down with respect to the lower mold 10. The upper die 20 is supported around the guide posts 12 and 14 via a bush 22 such as a ball bush. Then, through the bush 22, the upper mold 2
0 can be smoothly slid up and down around the guide posts 12 and 14. Above the upper die 20, a shank 30 is disposed upright. The shank 30 is supported via a guide 80 so as to be vertically movable with respect to the lower mold 10. Shank 30
The upper end is connected to press driving means (not shown). Then, the shank 30 supported by the guide 80 can be moved up and down by the press driving means. Then, the shank 30 is moved upward by the press driving means, whereby the upper end of the upper die 20 is pressed in the direction of the lower die 10 by the lower end of the shank 30, and the upper die 20 is moved around the guide posts 12 and 14 by the lower die 10. It is configured to be able to descend in the direction. A hanging arm 24 extends from the upper mold 20,
A bulging portion 32 formed at the lower end of the shank 30 is held inside the hanging arm 24. Then, the shank 30 is moved upward by the press driving means, so that the upper die 20 having the hanging arm 24 extended therewith can be moved above the lower die 10 together with the shank 30. ing.

In this press apparatus, the shank 30 supported by the guide 80 is moved downward by the press driving means, and the upper surface of the upper mold 20 is pressed in the direction of the lower mold 10 by the lower end of the shank 30 so that the upper mold 20 is moved. The lower mold 10 can be lowered. Then, the workpiece 50 mounted on the upper surface of the die 40 such as the die 44 provided on the upper surface of the lower die 10 by the die 40 such as the punch 42 provided on the lower surface of the upper die 20 via the die holder 46. Can be subjected to press working such as punching holes. The upper die 20 provided with the die 40 such as the punch 42 after the press working is extended to the upper die 20 by raising the shank 30 supported by the guide 80 by press driving means. With the bulge 32 at the lower end of the shank 30 held inside the hanging arm 24, the guide post 12, 1, and the shank 30 are held together.
4 can be moved upward. Then, the upper mold 20 provided with the mold 40 such as the punch 42 can be detached above the lower mold 10 provided with the mold 40 such as the die 44.

[0004]

However, in the above-mentioned press apparatus, the guide 8 is driven by the press driving means.
When the shank 30 supported at 0 is moved downward and the upper surface of the upper die 20 is pressed by the lower end of the shank 30, and the upper die 20 is lowered in the direction of the lower die 10, as shown by arrows in FIG. The shank 30, which is supported by the guide 80 with a predetermined clearance 82, vibrates in the lateral direction due to the force from the press driving means or the like. And the same Figure 4
As shown by the arrow in FIG. 3, a lateral vibration force is applied from the shank 30 vibrating in the lateral direction to the upper surface of the upper die 20 against which the lower end of the shank 30 is pressed. As a result, the upper mold 20 supported around the guide posts 12 and 14 of the lower mold 10 received lateral vibration force from the shank 30 and vibrated in the lateral direction. The upper die 20 is connected to the guide posts 12 and 14 erected on the lower die 10.
Cannot be accurately lowered perpendicularly to the direction of the lower mold 10 or the like. Then, the workpiece 50 mounted on the upper surface of the die 40 such as the die 44 provided in the lower die 10 is pressed by a die 40 such as a punch 42 provided in the upper die 20 to form a punched hole or the like. Can no longer be applied with high accuracy.

In particular, in the case of electronic parts such as lead frames that require precision processing on the order of microns, the press processing accuracy of the above-mentioned press device is reduced, and the quality of the electronic components formed by the press device is greatly reduced. It has dropped.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and prevents a lateral vibration of an upper die that is pressed and lowered by a lower end of a shank supported by a guide, and a punch provided on the upper die. It is an object of the present invention to provide a press device capable of performing a precise press working on a workpiece mounted on an upper surface of a die such as a die provided in a lower die using the die.

[0007]

In order to achieve the above object, a pressing device according to the present invention is capable of moving vertically around a lower die and a guide post erected on the lower die with respect to the lower die. A press device for performing press working on a workpiece using a mold provided in an upper mold supported by the upper mold by a shank lower end supported by a guide and moving up and down with respect to the lower mold. In a press device that presses the upper surface of the mold in the lower mold direction and lowers the upper mold around the guide post in the lower mold direction,
In the middle of the shank, a fulcrum having a degree of freedom of bending in the direction of 360 degrees is provided, and the lower end of the shank and the upper mold upper surface for pressing the shank are in point contact with each other.
Along with the shank lower end or one of the upper mold upper surface portions that press it against bulge into a spherical shape or a shape close thereto,
The upper part of the upper mold or the lower end of the shank is formed in a flat shape, or both the lower end of the shank and the upper part of the upper mold that presses the shank are bulged into a spherical shape or a shape close thereto. And

In this press apparatus, the shank supported by the guide is lowered in the lower mold direction by the press driving means, and the upper surface of the upper mold is pressed in the lower mold direction by the lower end of the shank, and the upper mold is moved in the lower mold direction. When the shank receives the lateral vibration force from the press driving means or the like and vibrates in the horizontal direction during the lowering, the middle part of the shank is adjusted according to the vibration direction and the vibration amount of the shank. Around a fulcrum provided in the middle of the shank and having a degree of freedom of bending in the direction of 360 degrees around, it can be bent at an appropriate angle in the appropriate direction with 360 degrees of freedom. Then, the lateral vibration of the shank can be absorbed by the fulcrum.

In this press apparatus, the lower end of the shank or one of the upper surface portions of the upper die for pressing the shank is bulged into a spherical shape or a shape close thereto, and the other upper surface portion of the upper die or the lower end of the shank is flat. Shape,
Alternatively, both the lower end of the shank and the upper surface of the upper die that presses the shank are bulged into a spherical shape or a shape close thereto, and the lower end of the shank can be pressed against the upper surface of the upper die in a point contact state. it can. Then, as described above, when the shank is bent at an appropriate angle around the fulcrum of the halfway portion, the lower end of the shank is pressed in accordance with the bending direction and the bending angle of the halfway portion of the shank. The upper die portion thus moved can be moved while being in rolling contact with a point contact state. As a result, the lateral vibration force transmitted from the shank that vibrates in the horizontal direction due to the lateral force from the press driving means and the like to the upper mold part where the lower end of the shank is pressed is gradually reduced to almost zero. Can be done. Then, the upper mold can be prevented from vibrating in the lateral direction with respect to the lower mold by receiving the lateral vibration force of the shank. Then, the upper die can be accurately lowered vertically or the like without shaking laterally in the lower die direction in accordance with the shape around the guide post.

In the press device of the present invention, the upper die is
It is preferable that the guide post is supported around a bush via a bush.

In this press apparatus, the upper die can be smoothly slid vertically around the guide post with respect to the lower die via the bush.

[0012]

Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1, FIG. 2 or FIG. 3 shows a preferred embodiment of the press apparatus of the present invention, and FIG. 1, FIG. 2 or FIG. 3 is an enlarged structural explanatory view around the shank. Hereinafter, the press device will be described.

In the press apparatus shown in FIG. 1, FIG. 2 or FIG. 3, the shank 30 supported vertically movably with respect to the lower mold 10 with a predetermined clearance 82 in the guide 80.
A fulcrum 60 having a degree of freedom of bending in a direction of 360 degrees around is provided in the middle of. Specifically, the middle part of the shank 30 is vertically divided, and one half of the middle part of the shank 30 (in the drawing, the lower half is shown),
A sphere 70 protrudes through the arm 34. In the other part of the middle part of the shank 30 (the upper part in the figure, the upper part is divided), a spherical depression 72 is provided, and the above-mentioned sphere 70 can slide in the direction of 360 degrees around the depression 72. Have a hug. In addition, as the fulcrum 60, a universal joint or the like formed by combining cross arms can be used.

One of the lower end of the shank 30 and the upper surface of the upper die 20 for pressing the shank 30 is bulged into a spherical shape or a shape close thereto. At the same time, the upper surface portion of the other upper mold 20 or the lower end of the shank 30 is formed in a planar shape.
Alternatively, both the lower end of the shank 30 and the upper surface of the upper die 20 for pressing the shank 30 are bulged into a spherical shape or a shape close thereto. Specifically, in the press device shown in FIG. 1, the lower end of the shank 30 is bulged into a spherical shape or a shape close thereto. At the same time, the upper surface of the upper die 20 for pressing the lower end of the shank 30 is formed in a planar shape. In the press device shown in FIG. 2, the lower end of the shank 30 is formed in a planar shape. At the same time, the upper surface of the upper die 20 for pressing the lower end of the shank 30 is bulged into a spherical shape or a shape close thereto. In the press device shown in FIG. 3, both the lower end of the shank 30 and the upper surface of the upper die 20 that presses the shank 30 are bulged into a spherical shape or a shape close thereto.

The rest of the configuration is the same as that of the above-described press apparatus shown in FIG. 4, and its use example and operation are the same as those of the above-described press apparatus shown in FIG. 4 except for the following points. is there. In the press apparatus shown in FIG. 1, FIG. 2 or FIG. 3, the shank 30 supported with a predetermined clearance 82 on the guide 80 is lowered in the direction of the lower mold 10 by the press driving means, and the lower end of the shank 30 is lowered. By upper mold 2
0 When the upper surface is pressed in the direction of the lower die 10 and the upper die 20 is lowered in the direction of the lower die 10, the shank 30 receives a lateral force from a press driving means or the like and vibrates in the lateral direction. In accordance with the vibration direction and the amount of vibration of the shank 30, the middle of the shank 30 is rotated around a fulcrum 60 having a degree of freedom of bending in a direction of 360 degrees around the middle provided in the middle of the shank. It can be bent at an appropriate angle in an appropriate direction with 360 degrees of freedom. And that shank 3
Zero lateral vibration can be absorbed by the fulcrum 60 described above.

Also, one of the lower end of the shank 30 or the upper surface of the upper die 20 for pressing the same is bulged into a spherical shape or a shape close thereto, and the other upper surface portion of the upper die 20 or the lower end of the shank 30 is made flat. The shank 30 is formed, or both the lower end of the shank 30 and the upper surface of the upper die 20 that presses the shank 30 are bulged into a spherical shape or a shape close to the spherical surface. It can be pressed in the state. Then, as described above, the shank 30 is fixed to the fulcrum 60 provided in the middle thereof.
The upper surface of the upper mold 20 in which the lower end of the shank 30 is pressed against the bending direction and the bending angle of the halfway portion of the shank 30 in a case where the shank 30 is bent in an appropriate direction with a degree of freedom of 360 degrees around the center. The part can be moved while being in rolling contact with a point contact state.

As a result, the vibration force of the shank 30 vibrating in the lateral direction by receiving the lateral force from the press driving means or the like is transmitted to the upper surface of the upper die 20 against which the lower end of the shank 30 is pressed. It can be reduced to near. Then, the upper mold 20 can be prevented from vibrating in the lateral direction with respect to the lower mold 10 by receiving the lateral vibration force of the shank 30. Then, the upper die 20 is made to follow the shape of the guide posts 12 and 14 erected on the lower die 10 so as to follow the lower die 1.
The descent can be accurately performed almost perpendicularly to the zero direction.
Then, a mold 40 such as a punch 42 provided in the upper mold 20 is provided.
Accordingly, the workpiece 50 mounted on the upper surface of the die 40 such as the die 44 provided in the lower die 10 can be subjected to press working such as high-precision punching without any deviation.

In the above press apparatus, the upper die 20
May be directly supported around the guide posts 12 and 14 so as to be able to slide up and down with respect to the lower mold 10 without the intervention of the bush 22. Also in this case, a press device having substantially the same operation and effect as the above-described press device can be provided.

[0019]

As described above, according to the press apparatus of the present invention, the upper die pressed and lowered by the lower end of the shank is prevented from vibrating in the lateral direction by receiving the lateral vibration force of the shank. be able to. Then, the periphery of the guide post can be accurately lowered substantially perpendicularly to the lower mold direction without vibrating the upper mold in the lateral direction. Then, the workpiece mounted on the upper surface of the die such as the die provided in the lower die can be subjected to press working such as precision punching by a die such as a punch provided in the upper die.

Further, the upper die is made to follow the shape of the guide post erected on the lower die so as not to vibrate in a lateral direction with respect to the lower die, but to be substantially perpendicular to the lower die. Can be lowered. Then, when the upper mold is lowered in the lower mold direction, the mold such as the punch provided in the upper mold does not accurately fit into the mold such as the die provided in the lower mold, It is possible to prevent a mold such as a punch provided from gallinging a part of a mold such as a die provided in the lower mold. Then, it is possible to prevent the accuracy of the mold such as the punch and the die provided in the upper mold and the lower mold from being reduced, and to shorten the life of the mold provided in the upper mold and the lower mold. .

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of an enlarged structure around a shank of a press device of the present invention.

FIG. 2 is an explanatory diagram of an enlarged structure around a shank of the press device of the present invention.

FIG. 3 is an explanatory view of an enlarged structure around a shank of the press device of the present invention.

FIG. 4 is a structural explanatory view of a conventional press device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Lower die 12, 14 Guide post 20 Upper die 22 Bush 24 Hanging arm 30 Shank 32 Shank lower end bulge 40 Die 42 Punch 44 Die 50 Workpiece 60 Mid-shank fulcrum 70 Sphere 72 Depression 80 Guide 82 clearance

Claims (2)

[Claims] 1. A workpiece to be processed using a mold provided in a lower mold and an upper mold which is supported around a guide post erected on the lower mold so as to be vertically movable with respect to the lower mold. A press device that presses the upper die upper surface by a shank lower end supported by a guide and moving up and down with respect to the lower die in a lower die direction,
In a press device for lowering the upper die in the direction of the lower die around the guide post, a fulcrum having a degree of freedom of bending in a 360-degree direction around the shank is provided in the middle of the shank, and the shank is pressed against the lower end of the shank. So that the upper mold upper surface part is in a point contact state,
Along with the shank lower end or one of the upper mold upper surface portions that press it against bulge into a spherical shape or a shape close thereto,
The upper part of the upper mold or the lower end of the shank is formed in a flat shape, or both the lower end of the shank and the upper part of the upper mold that presses the shank are bulged into a spherical shape or a shape close thereto. And press equipment. 2. The press device according to claim 1, wherein the upper die is supported around the guide post via a bush.