JP3351142B2 - Press type equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a press die apparatus for forming a press product having an undercut portion.

[0002]

2. Description of the Related Art Some press-type devices used for forming a press product having an undercut portion employ a slide die S as shown in FIG. 8, for example, in consideration of removal of the press product from the die. . The slide die S is formed by a cam action based on the vertical movement of a driver member D provided on an upper die (not shown). The product W is configured to move horizontally between the retracted position removed from the undercut portion Wa of the product W. In the drawing, reference numeral H denotes a fixed die attached to a lower die body (not shown) for holding a work before the undercut portion Wa is formed, and reference numeral s denotes a slide die S to be attached to a processing position. It is a spring for energizing.

[0003]

In the press-type apparatus shown in FIG. 8, a gap is set between the slide die S and the fixed die H so that the slide die S can be moved horizontally. For this reason, when the slide die S is occupied at the predetermined machining position, as shown in the drawing, there is a large gap between the work contact surface Sa of the slide die S and the work contact surface Ha of the fixed die H. There is a gap. Thus, in order to form a press product having an undercut portion, in a conventional press die apparatus employing a slide die that moves in a horizontal direction, an inadvertent gap generated on the workpiece contact surface of the die as described above. As a result, there is a disadvantage that the appearance of the press-formed product is poor and the dimensional accuracy is poor. The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a press-type apparatus capable of manufacturing a press-formed product having an undercut portion without causing poor appearance and poor dimensional accuracy.

[0004]

Therefore, in a press-type apparatus according to the present invention, a fixed die for holding a work at a predetermined processing position is installed on a lower die body, and a bend punch provided on an upper die is provided. A bend die having a bend processing portion for forming an undercut portion in a work in cooperation with the lower die body is movably installed, and two fulcrums provided on the bend die are respectively arranged in a linear direction and in mutually different directions. A guide means for guiding is installed on the lower mold body,
Based on the vertical movement of the upper die, the working position where the work contact surface of the bend processing portion occupies a predetermined processing position in a manner continuous with the work contact surface of the fixed die, and the bend processing portion moves to the predetermined processing position. The bend die is configured to perform an approximate rotational movement while being guided by guide means between a retracted position and a retracted position where the bend die retracts from the retracted position.

[0005]

According to the above construction, since the bend die moves between the operating position and the retracted position by the approximate rotational movement, the work contact surface of the bend machining portion is made continuous with the work contact surface of the fixed die at the operation position. In this aspect, the bend die can be occupied at a predetermined processing position.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the drawings showing one embodiment. FIGS. 1 to 6 show a press-type apparatus according to the present invention in an automobile body manufacturing process in an automobile production facility. C shows an example in which the present invention is applied to a press-type apparatus for performing a bending process including an undercut portion.

As shown in FIGS. 1 to 6, a lower die 10 of a press-type device 1 according to the present invention is mounted on a lower die body 11 in such a manner that a work (side body outer panel) W is held at a predetermined processing position. Fixed die 12 and lower die body 1
1 and a bend die 20 movably mounted on the lower die main body 11 for operating a bend punch 40 described later.

The bend die 20 includes a bend punch 40
And a cam portion 22 which abuts a driver member 31 fixed to an upper die 30 to be described later.
And stopper plates 23A and 23B attached to the bottom surface 20a and the back surface 20b.

A lower bush 2A as a fulcrum is fixed to the bottom surface 20a of the bend die 20. The lower bush 2A supports the lower slider 3A, while a rear portion 20b of the bend die 20 as a fulcrum is provided on the back surface 20b. A bush 2B is fixed, and the rear bush 2B supports a rear slider 3B.

As shown in FIGS. 2 and 3, the lower slider 3A is a block 3Ab slidably positioned between a pin 3Aa inserted into the lower bush 2A and a pair of opposing lower guide plates 4A, 4A. It is composed of

On the other hand, the rear slider 3B comprises a pin 3Ba fitted into the rear bush 2B and a block 3Bb slidably located between a pair of rear guide plates 4B, 4B opposed to each other. .

The lower slider 3A and the lower guide plates 4A, 4A constitute lower guide means 5A, and the rear slider 3B and the rear guide plates 4B, 4B constitute rear guide means 5B.

The lower guide plate 4A and the rear guide plate 4B are fixed to the lower die body 11 so as to extend along a straight line, respectively, and the lower guide plate 4A extends substantially along the horizontal direction. On the other hand, the rear guide plate 4B extends vertically.

That is, the lower guide plate 4A and the rear guide plate 4B guide the lower slider 3A and the rear slider 3B, respectively, along a linear direction and along different directions.

As a result, the lower slider 3 is guided by the lower guide plate 4A and the rear guide plate 4B.
A and the rear slider 3B, in other words, the lower bush 2A and the rear bush 2B move,
The bend die 20 moves along a trajectory that is not an approximate rotational motion, that is, a circular motion that rotates around a fixed axis but is extremely circular.

The bend die 20 makes an approximate rotational movement, so that the work contact surface 21a of the bend processing portion 21 is continuous with the work contact surface 12a of the fixed die 12, as shown in FIGS. 1 and 6, and the bend processing unit 21 moves between the retracted position retracted from the predetermined processing position and the operating position occupying the predetermined processing position.

The lower guide 5A and the rear guide 5B are provided not only on one side of the bend die 20 but also on the other side (not shown) of the bend die 20. It is installed on each side. Also, the lower die body 11 and the bend die 2
A tension spring 6 for interposing the bend die 20 in the retracted position in a normal state is interposed between the tension spring 6 and the retracted position.

On the other hand, the upper die 30 of the press die apparatus 1 is provided with a driver member 3 for operating the above-described bend die 20.
1 and a bend punch 40 for forming an undercut portion on the work W.

The bend punch 40 is used for the bend die 20.
A bend processing portion 41 for forming an undercut portion in the work W in cooperation with a cam portion 42 which comes into contact with the driver member 13 fixed to the lower die body 11 by a guide means (not shown). The upper die 30 is movably supported along the slope 30A, and is located between the upper die 30 and the bend punch 40 for normally occupying the bend punch 40 at the initial position shown in FIG. Means, for example, an elastic body (not shown) such as a tension spring or a rubber block is interposed.

Further, a bend pad 5 for pressing the workpiece W against the bend die 20 is provided on the bend punch 40.
The bend pad 50 is supported by guide means (not shown) so as to be movable in a direction parallel to the direction in which the bend punch 40 moves with respect to the workpiece W. A biasing spring 51 is interposed between the pad 50 and the pad 50.

A work pad 60 is provided on the upper mold 30. The work pad 60 is vertically movable with respect to the upper mold 30 and presses and holds a work W set on the fixed die 12. It is urged downward to make it easier.

In the press-type apparatus 1 having the above-described configuration,
When performing press working on the work W, first, as shown in FIG. 1, the work (side body outer panel) W preformed in the previous process is placed on the fixed die 12 provided on the lower die body 11. By doing so, it is set at a predetermined processing position.

At this time, the upper die 30 is widely opened with respect to the lower die 10, and the bend die 20 provided on the lower die 10 is provided.
In FIG. 1, the bend processing portion 21 is occupied at a retracted position retreated from a predetermined processing position, and
The bend punch 40 provided at 0 occupies the initial position shown in FIG.

After placing the workpiece W on the fixed die 12,
When the lowering operation of the upper mold 30 starts, the driver member 31 provided on the upper mold 30 is moved to the bend die 20 as shown in FIG.
When the upper die 30 further descends, the bend die 20 is moved from the retracted position shown in FIG. 1 to the operating position shown in FIG. 4 by the cam action between the cam portion 22 and the driver member 31. While being guided by the lower guide means 5A and the rear guide means 5B, it moves against the elastic return force of the tension spring 6.

At this time, as the bend die 20 occupies the operating position, the bend processing portion 21 of the bend die 20 has its work contact surface 21a continuous with the work contact surface 12a of the fixed die 12, as described above. It occupies a predetermined processing position.

The stopper plate 23A and the stopper plate 23B provided on the bend die 20 are in contact with the wall surface of the lower die body 11 to restrict the movement of the bend die 20.

Further, in the state shown in FIG. 4, the work pad 32 is in contact with the work W, and the work W is pressed against the fixed die 12, and the bend punch 4
0 is the driver member 1 of the lower die body 11.
It is in contact with 3.

Next, as the upper die 30 continues to descend, the bend punch 40 is moved by the cam portion 42 and the driver member 13.
5 from the initial position shown in FIG.
The workpiece W moves along the direction in which the work W is processed against the return force of the elastic body (not shown) while being guided by the guide means (not shown) provided on the upper die 30 to the position shown in FIG.

Also, with the movement of the bend punch 40,
The bend pad 50 comes into contact with the work W, and the bend pad 50 presses the work W against the work contact surface 21 a of the bend die 20 by the urging force of the urging spring 51.

As the upper die 30 moves downward, the bend punch 40 moves from the initial position shown in FIG. 4 to the position shown in FIG. 5, thereby bending the bend portion 21 of the bend die 20 and the bend portion 41 of the bend punch 40. The undercut portion Wa is formed at the edge of the work W as shown in FIG.

At this time, as described above, the bend die 2
0 and the work contact surface 12a of the fixed die 12 are continuous with each other.
A press-formed product having an undercut portion Wa can be manufactured without any inadvertent gap between the metal and the bend die 20, and without causing poor appearance and poor dimensional accuracy.

A large press pressure acting on the bend die 20 from the bend punch 40 via the work W due to the lowering operation of the upper die 30 is received by the lower die main body 11 via the stopper plates 23A and 23B. As a result, the lower guide means 5A and the rear guide means 5B are prevented from being damaged or broken.

Undercut portion Wa for workpiece W
After the completion of the molding, the upper die 30 is raised, and the bend die 20 is moved from the operating position shown in FIG. 5 to the retracted position shown in FIG. 6 by the elastic return force of the tension spring 6.
It moves while being guided by the lower guide means 5A and the rear guide means 5B.

As a result, the bend processing portion 21 of the bend die 20 moves to the undercut portion W of the workpiece W.
a is removed from the workpiece W
Is taken out from the lower mold 10, more specifically, from the fixed die 12 upward.

When the upper die 30 is raised, the bend punch 40 and the bend pad 50 are moved to the initial positions shown in FIG. 6 by the return force of the elastic body (not shown) and the biasing spring 51. At the same time, the work pad 60 also returns to the initial position shown in FIG. 6, and waits for the next work to be carried in this state.

In the embodiment described above, an example is shown in which the present invention is applied to a press die apparatus for performing a bending process on an edge of a side body outer panel in an automobile production facility. The device is effectively applied not only to bending processing, but also to various processing including undercut parts, such as restriking processing (processing to measure dimensions to make the shape created in the previous process accurate). can do.

The press-type device according to the present invention is not only a device for manufacturing an automobile body but also a device for molding various press products having an undercut portion.
Needless to say, it can be effectively applied in various manufacturing fields.

[0038]

As described above in detail, in the press-type apparatus according to the present invention, the fixed die is installed on the lower die body, and the bend die having the bend processing portion is movably installed on the lower die main body. A guide means for guiding the two fulcrum points of the bend die along the respective linear directions and mutually different directions is provided on the lower mold body, so that the bend die is rotated approximately between the operating position and the retracted position. ing. As described above, the bend die is moved approximately between the operating position and the retreat position by approximately rotating the bend die, so that the work contact surface of the bend processing portion is continuous with the work contact surface of the fixed die. The bend die can be occupied at a predetermined processing position. That is, according to the press die apparatus according to the present invention, when press-molding a product, it is possible to prevent an inadvertent gap from being formed on the workpiece contact surface of the die, and thus a press-formed product having an undercut portion, It is possible to manufacture without causing poor appearance and poor dimensional accuracy.

[Brief description of the drawings]

FIG. 1 is a conceptual diagram of a main part showing a configuration of a press-type apparatus according to the present invention.

FIG. 2 is a sectional view taken along line II-II in FIG.

FIG. 3 is an exploded perspective view conceptually showing a configuration of guide means in the press-type device.

FIG. 4 is a conceptual diagram showing the operation of a press-type device.

FIG. 5 is a conceptual diagram showing the operation of a press-type device.

FIG. 6 is a conceptual diagram showing the operation of a press-type device.

FIG. 7 is an overall view showing a side body outer panel of an automobile body as an example of a pressed product.

FIG. 8 is a conceptual diagram of a main part showing a configuration of a conventional press-type apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Press-type apparatus, 5A ... Lower guide means, 5B ... Rear guide means, 10 ... Lower mold, 11 ... Lower mold main body, 12 ... Fixed die, 12a ... Work contact surface, 13 ... Driver member, 20 ... Bend die, Reference numeral 21: bend processing portion, 21a: work contact surface, 30: upper die, 40: bend punch, 50: bend pad, 51: biasing spring, W: work (side body outer panel).

Claims (1)

(57) [Claims] A fixed die installed on a lower die body in a manner to hold a work at a predetermined processing position, and a bend processing portion for forming an undercut portion on the work in cooperation with a bend punch provided on an upper die. A bend die installed movably with respect to the lower die body; and guide means installed on the lower die body in such a manner as to guide two fulcrums provided on the bend die along respective linear directions and mutually different directions. An operating position in which the bend die occupies a predetermined processing position in a manner in which the work contact surface of the bend processing portion is continuous with the work contact surface of the fixed die based on the vertical movement of the upper die; A press-type apparatus characterized in that the processing section is configured to perform an approximate rotational movement while being guided by the guide means, between a retracted position where the processing section is retracted from a predetermined processing position.