JP2004237300A - Press - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To make a sheet material after working to be easily demolded, when using a shift-bending die to form a flange on the sheet material. <P>SOLUTION: In the lower-die side of a shift-bending die 18, a cam holder 6 and a lower-die punch 7 are mounted to support a turning cam 5. In the upper-die side thereof, a pad 9, a flying cam 10 (a sliding cam), and a bending blade 11 are mounted. The lower-die punch 7 is equipped with a push rod 24. The upper-die is lowered to turn the turning cam 5 to a working position, and a fender panel 2, which is set on the lower-die punch 7, is shift-bent and bent to form a flange parts 3 and 4 with the shift-bending blade 16 of the flying cam 10 and a bending blade 11 thereof respectively. Thereafter, the upper-die is lifted to turn the turning cam 5 to a releasing position, and the push rod 24 is pressed by the turning cam 5 and ejected from the lower-die punch 7 to push open the flange part 4. Consequently, the fender panel 2 is easily demolded. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
[Industrial applications]
The present invention relates to a press device for bending a flange portion at an edge of a plate material between an upper die and a lower die.
[0002]
[Prior art]
Referring to FIGS. 6 and 7, an example of a conventional approach bending die for forming a flange by bending and shifting an edge portion of a relatively large plate material such as an automobile fender panel will be described.
[0003]
As shown in FIG. 6 and FIG. 7, the approaching bending die 1 uses the upper mold and the lower mold to approach and bend the flange portion 3 to the edge on one side of the fender panel 2 and to form the edge on the other side. This is a press device for bending the flange portion 4. The approach bending mold 1 is provided with a rotating cam 5, a cam holder 6 and a lower mold punch 7 that rotatably support the rotating cam 5, and a plurality of sub-lifters 8 on the lower mold side. A pad 9, an upper suspension cam 10 (slide cam), and a bending blade 11 are mounted on the upper mold side.
[0004]
The turning cam 5 is turned to a release position where the fender panel 2 can be attached and detached, and the fender panel 2 preformed into a predetermined shape is set on the lower punch 7. When the upper die is lowered, first, the leading pin 12 attached to the bending blade 11 pushes down the lift plate 13 of the sub-lifter 8 against the spring force of the coil spring 14 and is elastically supported by the upper die. The pad 9 presses and fixes the fender panel 2 to the lower punch 7. When the upper die is further lowered, the upper suspension cam 10 engages with the slide plate 15 attached to the rotation cam 5 to rotate the rotation cam 5 to the processing position (see FIG. 7), The flange portion 3 of the fender panel 2 is moved in a horizontal direction along the direction 15 by the bending blade 16. At the same time, the bending blade 11 descends to bend the flange portion 4 of the fender panel 2.
[0005]
Thereafter, when the upper die is raised, the upper suspension cam 10 retreats and rises along the slide plate 15, and the bending blade 11 rises together with the upper die. When the rotating cam 5 is rotated to the release position and the upper die is further raised to raise the pad 9, the lift plates 13 of the plurality of lifters 8 arranged around the lower die punch 7 are raised by the coil springs 14. Then, the fender panel 2 is pushed up by contacting the flange portion 4. Thereby, the fender panel 2 can be released from the lower punch 7.
[0006]
Note that Patent Document 1 discloses an approach bending type in which a flange portion of a plate material is approached and bent using a rotating cam as described above.
[0007]
[Patent Document 1]
JP-A-8-323420
[Problems to be solved by the invention]
However, the conventional approaching bending die 1 has the following problem. In the approach bending die 1, as shown by hatching in FIG. 6, a sub-lifter 8 for lifting the flange portion 4 formed by bending the fender panel 2 is arranged on the back of the rotating cam 5. For this reason, as shown in FIG. 7, it is necessary to secure a space for arranging the sub-lifter 8 behind the rotating cam 5 of the lower punch 7, and accordingly, the thickness of the lower punch 7 is reduced. Therefore, the rigidity of the lower punch 7 is reduced, and there is a possibility that the processing accuracy is reduced.
[0009]
The present invention has been made in view of the above points, and an object of the present invention is to provide a press device that can release biting of a plate material into a mold without reducing rigidity of the mold.
[0010]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the invention according to claim 1 is a press device for bending a flange portion at an edge of a plate material with an upper die and a lower die, wherein the plate material is provided on the lower die. A cam that can move between a processing position that forms a part of the support surface and a release position that allows the plate material to be released after bending, and when the cam is in the processing position in conjunction with the movement of the cam. When the cam is at the release position, the flange is provided in the lower die, and the flange is removed from the lower die by pressing the flange portion that has been bent and pressed away from the lower die. Features.
With this configuration, during machining, the flange removing means is stored in the lower mold in conjunction with the position of the cam in the machining position, and in releasing the lower mold in association with the position of the cam in the release position. From the lower die to assist the release.
According to a second aspect of the present invention, in the press device according to the first aspect, the cam is a rotating cam rotatably supported by the lower mold.
With this configuration, the rotating cam is rotated to support the plate material and to release the plate material.
According to a third aspect of the present invention, in the press device according to the first aspect, the cam is a slide cam slidably supported by the lower mold.
With this configuration, the slide cam is slid and moved to support the plate material and to release the plate material.
According to a fourth aspect of the present invention, in the pressing device according to any one of the first to third aspects, the cam has a cam surface that contacts the flange scraping means and moves the flange scraping means. It is characterized by doing.
With this configuration, the flange removing means is moved by being pressed by the cam surface in conjunction with the movement of the cam.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The same parts as those in the conventional example shown in FIGS. 6 and 7 are denoted by the same reference numerals and described.
[0012]
An approach bending die according to a first embodiment of the present invention will be described mainly with reference to FIGS. As shown in FIGS. 1 to 4, the approach bending die 18 (press apparatus) according to the present embodiment includes a flange portion on a fender panel 2 (plate material), similarly to the conventional approach bending die 1 shown in FIGS. 6 and 7. This is a press mold for performing bending and bending processes of Nos. 3 and 4, respectively. The lower bending die 18 is provided with a rotating cam 5, a cam holder 6 and a lower punch 7, which rotatably support the rotating cam 5, and a sub-lifter 8 (see FIG. 6). Further, a pad 9, an upper suspension cam 10, and a bending blade 11 are mounted on the upper die side.
[0013]
The rotary cam 5 has a shape in which a part of a column is cut out, and a support portion 19 for bending and bending the flange portion 3 is formed on one side of the cut portion, and the upper hanging cam 10 is guided on the other side. The slide plate 15 is mounted. A flat cam surface 20 is formed on a part of the outer peripheral surface. The lower punch 7 is attached to the cam holder 6, and the rotating cam 5 is fitted and supported rotatably on the cylindrical inner surface formed on the lower punch 7. The rotating cam 5 can be rotated between a release position shown in FIG. 1 and a processing position shown in FIG. 2 by known driving means such as an air cylinder and a spring.
[0014]
The lower punch 7 is formed with a support surface 21 having a shape conforming to the inner surface of the fender panel 2. When the rotary cam 5 is rotated to the processing position shown in FIG. Together support the fender panel 2. In this state, the slide plate 15 attached to the rotating cam 5 is in a horizontal position and abuts on the cam holder 6. When the rotating cam 5 is rotated to the release position shown in FIG. 1, the rotating cam 5 is separated from the shifted and bent flange portion 3 to enable the fender panel 2 to be released.
[0015]
As in the conventional example shown in FIG. 6, a plurality of sub-lifters 8 are arranged in the approach bending die 18, but the sub-lifter 8 (shown by hatching in FIG. 6) at the back of the rotating cam 5 is omitted. Accordingly, the lower portion 7A of the lower punch 7 is made thicker, and the rigidity of the lower punch 7 is increased. The lower punch 7 is provided with a flange removing device 22 described later.
[0016]
The pad 9 is elastically supported by the upper die, and when the upper die is lowered, the pad 9 is placed on the fender panel 2 set on the lower die punch 7 prior to the upper suspension cam 10 and the bending blade 11. The fender panel 2 is pressed against and fixed to the lower die punch 7, and when the upper die is raised after processing, the fender panel 2 is held so that the fender panel 2 does not rise with respect to the upper die. Hold down.
[0017]
The upper suspension cam 10 is suspended from an upper mold via a slide member. When the upper mold is lowered, the upper suspension cam 10 moves horizontally along the slide plate 15 of the rotating cam 5 at the processing position, The flange portion 3 of the fender panel 2 fixed on the lower die punch 7 by the pad 9 is shifted and bent by the shift bending blade 16.
[0018]
The bending blade 11 is fixed to the upper die. When the upper die is lowered, the bending blade 11 is lowered together with the upper die to bend the flange portion 4 of the fender panel 2 fixed on the lower die punch 7 by the pad 9. .
[0019]
Next, the flange wiping device 22 which is a main part of the present invention will be described.
The lower punch 7 is formed with a guide bore 23 penetrating from a cylindrical inner surface for guiding the rotating cam 5 to a portion of the fender panel 2 bent on the lower die 7 and facing the flange portion 4. I have. A push rod 24 (flange removing means) is guided in the guide bore 23 so as to move forward and backward. When the rotating cam 5 is at the processing position shown in FIG. 2, one end of the push rod 24 contacts the flat cam surface 20 of the rotating cam 5, and the other end is stored in the lower punch 7. When the rotating cam 5 is rotated to the release position shown in FIG. 1, one end is pressed against the cylindrical outer peripheral surface of the rotating cam 5 when the rotating cam 5 is rotated to the release position shown in FIG. The other end protrudes from the flange forming surface of the lower die 7.
[0020]
The push rod 24 is constantly urged toward the rotating cam 5 by a spring 25, and is pushed toward the flange forming surface by a stopper 27 attached to the flange forming surface of the lower punch 7 by a bolt 26. The amount of protrusion is regulated. Note that the bolt 26 and the stopper 27 may be omitted.
[0021]
Next, the operation of the present embodiment configured as described above will be described.
The upper die is raised, the rotary cam 5 is rotated to the release position, and the fender panel 2 preformed in a predetermined shape is set on the lower die punch 7. When the upper mold is lowered, the lift plates of the plurality of sub-lifters 8 arranged around the fender panel 2 are pushed down, and the pads 9 abut on the fender panel 2 to press the fender panel 2 against the lower mold punch 7. And fix it.
[0022]
When the upper die is further lowered, as shown in FIG. 2, the upper suspension cam 10 engages with the slide plate 15 to rotate the rotation cam 5 to the processing position, and moves horizontally along the slide plate 15. The flange 3 of the fender panel 2 is moved and bent by the moving blade 16 by moving. At this time, the bending blade 11 descends together with the upper die to bend the flange portion 4 of the fender panel 2.
[0023]
Thereafter, when the upper die is raised, as shown in FIG. 1, the upper suspension cam 10 retreats and rises along the slide plate 15 with the pad 9 pressing the fender panel 2 against the lower die punch 7. The rotating cam 5 is rotated to the release position while being separated from the fender panel 2. Further, the bending blade 11 rises together with the upper die and is separated from the fender panel 2.
[0024]
At this time, the push rod 24 is pressed by the cylindrical outer peripheral surface of the rotating cam 5 that rotates to the release position, moves against the spring force of the spring 25, and the bent flange of the fender panel 2 is formed. The tip of the part 4 is pushed open to separate from the flange forming surface of the lower punch 7. Thereby, the biting of the lower die punch 7 by the flange portion 4 of the fender panel 2 is released.
[0025]
When the upper mold is further raised, the pad 9 is separated from the fender panel 2, and the fender panel 2 on the lower mold punch 7 is lifted by the plurality of sub-lifters 8. At this time, since the flange portion 4 is pushed open by the push rod 24 and the bite to the lower punch 7 is released, the fender panel 2 can be reliably lifted from the lower punch 7 by the sub-lifter 8, It can be easily released.
[0026]
As described above, the provision of the flange removing device 22 can release the fender panel 2 from biting into the lower die without providing the sub-lifter 8 on the back of the rotating cam 5. Can be made thicker, and required rigidity can be secured.
[0027]
Next, a second embodiment of the present invention will be described with reference to FIG. The second embodiment is different from the second embodiment in that a slide cam is used instead of a rotating cam. Hereinafter, similar parts are denoted by the same reference numerals, and different parts will be described. Only the details will be described.
[0028]
As shown in FIG. 5, in the approach bending mold 28 according to the second embodiment, a slide cam 30 is provided on the lower mold 29 side instead of the rotating cam. The slide cam 30 is slidably guided in the horizontal direction with respect to the lower mold 29 and the lower punch 7 via a slide plate 31. In the processing position shown in FIG. The support 32 is integrated with the support surface 21 of the lower punch 7 to support the fender panel 2. In the release position where the support 32 is moved to the left from the processing position in FIG. To separate the fender panel 2 from the mold. The slide cam 30 can be moved between the processing position and the release position by known driving means such as an air cylinder and a spring.
[0029]
The slide cam 30 has a cam surface 33 facing one end of the push rod 24 of the flange removing device 22. When the slide cam 30 is in the processing position shown in FIG. 5, the cam surface 33 is separated from one end of the push rod 24, and the other end of the push rod 24 is stored in the lower punch 7, and the flange of the lower punch 7 It is flush with the molding surface. When the slide cam 30 is in the release position, the cam surface 33 presses one end of the push rod 24, and the other end of the push rod 24 projects from the flange forming surface of the lower punch 7.
[0030]
As in the first embodiment, a slide cam for shifting and bending the flange 3 and a bending blade for bending the flange 4 are provided on the upper mold side.
[0031]
With this configuration, when the slide cam 30 is moved from the processing position to the release position after the flange portions 3 and 4 are respectively bent and bent on the fender panel 2, the cam surface 33 of the slide cam 30 is moved. Presses the push rod, makes it protrude from the lower punch 7, pushes open the front end of the flange portion 4 of the bent fender panel 2, and separates it from the flange forming surface of the lower punch 7. Thereby, the biting of the fender panel 2 to the lower die 7 by the flange portion 4 can be released, and the same effect as in the first embodiment can be obtained.
[0032]
【The invention's effect】
As described above in detail, according to the press apparatus of the present invention, the provision of the flange removing means interlocked with the movement of the cam for bending can release the biting of the plate after the bending. In addition, the release of the plate material can be easily performed.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view schematically corresponding to the line BB of FIG. 4 schematically showing a state in which a pivoting cam of a bending-bend type according to a first embodiment of the present invention is at a release position.
FIG. 2 is a longitudinal sectional view schematically corresponding to the line BB of FIG. 4 schematically showing a state in which the rotary cam of the apparatus of FIG. 1 is at a processing position.
FIG. 3 is a longitudinal sectional view schematically corresponding to the line CC of FIG. 4 schematically showing a state in which the rotary cam of the apparatus of FIG. 1 is in a processing position.
FIG. 4 is a view of the flange removing device of the device of FIG.
FIG. 5 is a longitudinal sectional view schematically showing a state in which an approach bending type slide cam according to a second embodiment of the present invention is in a processing position.
FIG. 6 is a plan view schematically showing a conventional approach bending mold.
7 is a longitudinal sectional view schematically corresponding to the line DD of FIG. 6, schematically showing a state in which the rotating cam of the approach bending type shown in FIG. 6 is at a processing position.
[Explanation of symbols]
2 Fender panel (plate material)
3, 4 Flange 5 Rotating cam (cam)
18 Bend type (press machine)
24 Push rod (Flange removing means)

Claims (4)

A press device for bending a flange portion at an edge of a plate material with an upper die and a lower die, wherein a processing position provided on the lower die to form a part of a support surface of the plate material and the plate material after the bending process A cam movable to a release position allowing the mold to be released, and in conjunction with the movement of the cam, when the cam is at the processing position, is stored in the lower mold, and when the cam is at the release position, A press device, comprising: a flange removing means for projecting from the lower die and pressing the bent flange portion to separate from the lower die. The press device according to claim 1, wherein the cam is a rotating cam rotatably supported by the lower mold. The press device according to claim 1, wherein the cam is a slide cam slidably supported by the lower mold. The press device according to claim 1, wherein the cam has a cam surface that abuts the flange scraping means and moves the flange scraping means.

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