JP2008260062A - Forming mold for bending workpiece - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a forming mold for bending a workpiece, wherein the number of bending processes for a metallic sheet of the workpiece is reduced to obtain a finished product. <P>SOLUTION: A second rotating cam 31 is provided in a first rotating cam 30, the axis L2 of rotation of the second rotating cam 31 is inclined to the axis L1 of rotation of the first rotating cam 30 and the second rotating cam 31 can be rotated integrally with the first rotating cam 30. The first bent part W1 of the workpiece W formed with the first rotating cam 30 and the second bent part W2 of the workpiece W formed with the second rotating cam 31 are continuously formed at an acute angle. After the lock with the first bent part is released by allowing the second rotating cam 31 to be retreated during rotating, the first rotating cam 30 and the second rotating cam 31 are drawn out of the bent portion of bent parts W1, W2 by which the acute angle is formed at the mode that the first cam 30 and the second cam 31 are retreated while integrally rotating. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a bending mold for a workpiece for forming a metallic thin plate.

  Side panels, fenders, roof works, etc. in automobiles have a three-dimensional shape, and these have been completed through a number of processes. For this reason, when manufacturing these automotive parts, there existed a problem that many labor costs and time were required.

  Therefore, the industry that handles the side panels, fenders, and the like is awaiting the development of bending of workpieces that can produce the above parts with as little affirmation as possible.

As described above, it is desired not only in the automobile industry but also in other industries that a reduction in man-hours is desired.
JP 2005-28370 A (particularly FIGS. 9 to 14)

  Then, this invention makes it a subject to provide the bending mold of the workpiece | work which reduces the bending man-hour of the metal thin plate which is a workpiece | work leading to a finished product.

(Invention of Claim 1)
A bending mold for a workpiece according to the present invention is provided by providing a second rotating cam in the first rotating cam and inclining the rotation axis of the second rotating cam with respect to the rotating axis of the first rotating cam, The second rotating cam can rotate integrally with the first rotating cam, the first bent portion of the workpiece formed by the first rotating cam, and the second of the workpiece formed by the second rotating cam. After the bent portion is continuously formed at an acute angle, the second rotating cam is rotated backward and the locking with the first bent portion is released, and then the first and second rotating cams are integrally moved backward. In a moving manner, the first and second cams can be removed from the bent portion forming an acute angle.

(Invention of Claim 2)
The bending mold for a workpiece according to the present invention relates to the invention described in claim 1, and the first bent portion is a flange.

(Invention of Claim 3)
The bending mold of the workpiece according to the present invention relates to the rotation center position of the first rotating cam and the second rotating cam, and the rotation of the intrusion forming portion of the second cam with respect to the invention of claim 1 or 2. The position is shifted so that the backward trajectory does not interfere with the workpiece.

  According to the work bending mold of the present invention, the man-hours for bending a metal thin plate as a work leading to a finished product can be reduced.

  Embodiments will be described in detail below as the best mode for carrying out a work bending mold according to the present invention.

  As shown in FIGS. 1 to 4, the bending mold for a workpiece according to the present invention is provided with a second rotating cam 31 in the first rotating cam 30 and with respect to the rotation axis L <b> 1 of the first rotating cam 30. The rotation axis L2 of the second rotary cam 31 is inclined, and the second rotary cam 31 can be rotated integrally with the first rotary cam 30, and the workpiece formed by the first rotary cam 30. The first bent portion W1 of W and the second bent portion W2 of the workpiece W formed by the second rotating cam 31 are continuously formed at an acute angle, and the second rotating cam 31 rotates backward to rotate to the first bent portion. After the locking with W1, the first and second rotating cams 30, 31 are integrally retracted and rotated, and the bent portions W1, W2 form the first and second bent portions forming the acute angle. The second rotary cams 30 and 31 can be removed.

  In addition, as shown in FIG. 3, the bending mold of the workpiece is configured such that the rotation center positions of the first rotating cam 30 and the second rotating cam 31 are set to rotate and retract the entry forming portion of the second rotating cam 31. The position is shifted so that the trajectory and the workpiece W do not interfere with each other.

Below, the manufacturing process of the finished product by this Example is demonstrated concretely.
[First step]
In FIG. 1A, the work W has a V-shape when viewed from the top along the contact surface of the second rotating cam 31 by an intrusion forming portion (not shown) from the rotating plate 62.

  In FIG.1 (b), the upper mold | type 5 is covered on the workpiece | work W shown by a dashed-two dotted line, and the said workpiece | work W is curved as shown by a continuous line. In this state, the tip end of the workpiece W is in a suspended state, and the tip end faces the opening 35.

[Second step]
As shown in FIG. 2, when the intrusion forming portion 23 of the slide cam 21 is inserted into the opening 20, the bent portion W1 is formed.

[Third step]
As shown in FIG. 3, the upper mold 5 is removed and the slide cam 21 is retracted.
Next, as shown in FIG. 3, the second rotating cam 31 is rotated and retracted by an air cylinder (not shown), and the entering molding portion 12 of the second rotating cam 31 is allowed to escape from the first bent portion W <b> 1.
In the bending mold of the workpiece, the rotation center position of the first rotation cam 30 and the second rotation cam 31 is interfered with the rotation retreat locus of the entry forming portion 12 of the second rotation cam 31 and the workpiece W. Since the position is shifted so as not to occur, the escape is smooth.

[Fourth step]
As shown in FIG. 4, the first rotating cam 30 is rotated and retracted together with the second rotating cam 31 by an air cylinder (not shown). In this state, the workpiece W is in a non-locking state with the first and second rotating cams 30 and 31, and the workpiece W can be easily removed from the bending mold of the workpiece.

  Here, in the case of a workpiece W that is normally V-shaped in plan view and has the first bent portion W1, a plurality of man-hours are required. It is possible to reduce the man-hours for bending the metal thin plate as the work.

  FIG. 5 is a plan view of the entire apparatus F having the first rotary cam 1 and the second rotary cam 2 provided on the first rotary cam 1, and FIG. 6 is a diagram of the first rotary cam 1 and the portion of the second rotary cam 2 provided thereon. FIG. 7 is a perspective view of only the first rotary cam 1 and a portion of the second rotary cam 2 provided on the first rotary cam 1, and FIGS. 8 to 10 are perspective views showing the rotational state of the second rotary cam 2. FIG. Reference numerals 11 to 16 are partial cross-sectional views showing a mode in which the first and second bent portions W1 and W2 are formed on the workpiece W and the molded product is extracted.

(About the basic structure of the bending mold F)
As shown in FIGS. 5 to 16, the workpiece bending mold F includes (1) a second rotating cam 31 provided in the first rotating cam 30 and a rotation axis L <b> 1 of the first rotating cam 30. (2) The second rotary cam 31 can be rotated integrally with the first rotary cam 30, and the first rotary cam 30 can be rotated integrally with the first rotary cam 30. The first bent portion W1 of the workpiece W formed by the above and the second bent portion W2 of the workpiece W formed by the second rotating cam 31 are continuously formed at an acute angle. (3) The second rotating cam 31 is After the reverse rotation (rotation in the counterclockwise direction, hereinafter the same) is released and the engagement with the first bent portion W1 is released, the first and second rotating cams 30 and 31 are integrally moved backward. The first and second rotating cams 30 and 31 can be extracted from the bent portions forming the acute angles and the bent portions W1 and W2 in a moving manner. In that it becomes cormorants are quite the same as the first embodiment.

(Specific configuration of bending mold F)
As shown in FIGS. 5 to 7, the bending mold F includes a portion A including a first rotating cam 30 that forms the first bent portion W1 and a second bent portion W2. The rotation axis L2 of the second rotation cam 31 is 20 ° to 30 ° in a top view with respect to the rotation axis L1 of the first rotation cam 30. It is arranged at a tilt (not limited to this).

“Regarding part A”
The above-mentioned part A is comprised from the lower mold | type 1, the upper mold | type 2, and the pressing means 4, as shown to Fig.11 (a)-FIG.16 (a).

  As shown in FIGS. 11 (a) to 16 (a), the lower mold 1 has a concave portion 11 formed in an arc shape opened in the upper surface portion, and rotates around the rotation axis L1 in the concave portion 11. The first rotary cam 30 provided movably, the molded part 10 formed by providing a recess in the first rotary cam 30, and the concave wall of the first rotary cam 30 are attached to the outside. The rotating plate 60 and the air cylinder 70 for rotating the first rotating cam 30 forward and backward. In addition, the code | symbol L1 is the rotation axis L1 of the 1st rotation cam 30, the code | symbol 61 is a fixed plate, and the code | symbol 13 is a workpiece | work mounting part.

  As shown in FIGS. 11A to 16A, the upper mold 2 includes an upper mold main body 2A, a slide cam 20 movably attached to the upper mold main body 2A, and the slide cam 20. It is comprised from the penetration formation part 22 attached. Here, when no load is applied to the slide cam 20, the slide cam 20 is positioned on the right side by the urging force of the spring (see FIGS. 12, 14, and 15), and the lowering force acts on the upper mold 2 to rotate. When pressed onto the plate 60, it moves to the left against the biasing force of the spring.

  As shown in FIG. 12, the holding means 4 is provided on the upper die 2 and is composed of a shaft 40, a holding portion 41, and a spring 42. When the upper die 2 is lowered, the spring means 4 By the action of 42, an excessive force (a force that causes an inadvertent plastic deformation) is prevented from acting on the workpiece W.

“Regarding part B”
As shown in FIGS. 11 (b) to 16 (b), the lower mold 1 is configured to be recessed into the recessed portion 36 provided on the upper surface portion of the first rotary cam 30 and about the lower half of the recessed portion 36. The second rotating cam 31 that is rotatably arranged around the rotation axis L2, the molding portion 12 formed by providing a recess in the second rotating cam 31, and the recess of the second rotating cam 31. The rotary plate 62 is attached to the outside from the wall, and the gas cylinder 71 is projected and retracted to rotate the second rotary cam 31. In addition, the code | symbol L2 is the rotational axis L2 of the 2nd rotation cam 31, the code | symbol 63 is a fixed plate, and the code | symbol 14 is a workpiece | work mounting part.

  As shown in FIGS. 11B to 16B, the upper mold 2 includes an upper mold main body 2A ′, a slide cam 21 movably attached to the upper mold main body 2A ′, and the slide cam. 21. It is comprised from the penetration formation part 23 attached to 21. As shown in FIG. Here, when no load is applied to the slide cam 21, it is positioned on the right side by the biasing force of the spring (see FIGS. 12 (b), 14 (b) and 15 (b)), and the upper mold 2 When the force descending to 'is pressed against the rotating plate 62, it moves to the left against the biasing force of the spring.

  As shown in FIG. 11, the holding means 5 is provided on the upper mold 2 ′ and includes a shaft 50, a holding section 51, and a spring 52. When the upper mold 2 is lowered, The action of the spring 52 prevents an excessive force (a force that causes an inadvertent plastic deformation) from acting on the workpiece W.

(About the operation of the bending mold F)
The bending mold F forms the workpiece W into a predetermined shape as follows.
(1) Regarding the state in which the folding forming die F is shown in FIG. 11, the workpiece W is set at a predetermined position of the workpiece placing portions 13 and 14. In this state, as shown in FIG. 11A, the first rotating cam 30 is slightly rotated counterclockwise by the air cylinder 70, and the forming portion 10 is at a position away from the workpiece W. On the other hand, as shown in FIG. 8 to FIG. 10 and FIG. 11B, the second rotating cam 31 is formed from the plane of the first rotating cam 30 so that the gas cylinder 71 pushes up the first rotating cam 31 counterclockwise. It is in a protruding state.
That is, the forming part 10 is in a state far from the tip hanging part of the workpiece W, and the forming part 12 is in a state far from the tip hanging part of the work W.

(2) Regarding the state in which the bending mold F is shown in FIG. 12, the air cylinder 70 is driven to rotate the first rotating cam 30 in the clockwise direction. In this state, the forming portion 10 is in contact with the vicinity of the bent portion of the workpiece W, and the lower surface of the slide cam 20 and the rotary plates 60 and 61 are in contact. On the other hand, in this state, the forming portion 12 is in the state of moving near the hanging portion of the workpiece W, and the protruding end of the gas cylinder 71 and the lower surface of the rotating plate 62 are in contact with each other as shown in FIG. Yes.

(3) Regarding the state where the bending mold F is shown in FIG. 13 When the upper mold 2 is lowered, the slide cam 20 moves along the lower left side along the rotating plate 60, and the intrusion molding part 22 and the molding part 10 A hanging portion of the work W is formed into a predetermined bent shape, that is, a first bent portion W1. At the same time, when the upper mold 2 ′ is lowered, the upper part 2 ′ comes into contact with the hanging part of the workpiece W and the hanging part 23 and the molding part 12 cause the hanging part of the workpiece W to have a predetermined bent shape, that is, the second bent. Part W2 is formed.

(4) Regarding the state where the bending mold F is shown in FIG. 14 When the upper mold 2 is raised, the slide cam 20 is pulled down to the right side in contact with the rotating plate 60 and the fixed plate 61. Further, when the upper mold 2 ′ is raised simultaneously with the upper mold 2, the slide cam 21 causes the gas cylinder 71 to push up the rotating plate 62, and the second rotating cam 31 is rotated slightly in the counterclockwise direction. The forming part 12 is pulled out from the second bent part W2.

(5) Regarding the state where the bending mold F is shown in FIGS. 15 and 16, the upper molds 2 and 2 'are further raised, and at the same time, the first rotating cam 30 is rotated counterclockwise by the air cylinder 70. Then, the acute-angle bent portions formed by the first and second bent portions W1 and W2 can be extracted from the first and second rotating cams 30 and 31.

  In other words, according to the bending mold of the workpiece, it is clear that the man-hours for bending the metal thin plate that is the workpiece leading to the finished product can be reduced.

(About others)
Instead of the gas cylinder 71 employed in the second embodiment, an air cylinder may be employed. In this case, a configuration in which the second rotating cam 31 is directly rotated can be employed.

Sectional drawing which shows the state of the 1st process at the time of using the bending mold of the workpiece | work of Example 1 of this invention. Sectional drawing which shows the 2nd process in the case of using the said bending mold. Sectional drawing which shows the 3rd process in the case of using the said bending mold. Sectional drawing which shows the last process in the case of using the said bending mold. The top view of the apparatus which has the bending mold of the workpiece | work in Example 2 of this invention. The top perspective view of the apparatus which has the bending mold of the workpiece | work of the said Example 2. FIG. The perspective view which shows the part A and the part B in the bending mold of a workpiece | work. The perspective view just before a 2nd rotation cam is rotated counterclockwise by a rotation plate. The perspective view of a state in which the second rotating cam is gradually rotated counterclockwise by the rotating plate. The perspective view of the state in which the 2nd rotation cam was fully rotated counterclockwise by the rotation plate. Sectional drawing which shows the state of the 1st process at the time of using the bending mold of the workpiece | work of Example 2 of this invention. Sectional drawing which shows the state of the 2nd process at the time of using the bending mold of the workpiece | work of Example 2. FIG. Sectional drawing which shows the state of the 3rd process (process which shape | molds a 1st and 2nd bending part) at the time of using the bending mold of the workpiece | work of Example 2. FIG. Sectional drawing which shows the state of the 4th process (mainly the process of moving a slide cam to the left side) at the time of using the bending mold of the workpiece | work of Example 2. FIG. Sectional drawing which shows the state of the 5th process at the time of using the bending mold of the workpiece | work of Example 2 (a process of mainly removing the molding parts 10 and 12 from the first and second bent parts). Sectional drawing which shows the state of the 6th process (process of removing the shape | molded workpiece | work) at the time of using the bending mold of the workpiece | work of Example 2. FIG.

Explanation of symbols

W Work W1 1st bending part W2 2nd bending part L1 Rotating axis L2 Rotating axis 1 Lower mold 10 Molding part 11 Recessed part 12 Molding part 13 Workpiece mounting part 14 Workpiece mounting part 2, 2 'Upper mold 2A, 2A 'Upper die main body 20 Slide cam 21 Slide cam 22 Intrusion forming portion 23 Intrusion forming portion 30 First rotating cam 31 Second rotating cam 33 Intrusion forming portion 35 Opening portion
36 Depressed part 39 Contact surface 4, 5 Holding means 40, 50 Shaft 41, 51 Holding part 42, 52 Holding part 60 Rotating plate 61 Fixed plate 62 Rotating plate 63 Fixed plate 70 Air cylinder 71 Gas cylinder

Claims (3)

A second rotation cam is provided in the first rotation cam, and the rotation axis of the second rotation cam is inclined with respect to the rotation axis of the first rotation cam. The first bent portion of the workpiece formed by the first rotating cam and the second bent portion of the workpiece formed by the second rotating cam are continuously formed at an acute angle. A bent portion that forms an acute angle in a mode in which the first and second rotating cams move backward together after the second rotating cam is moved backward and released from the first bent portion. A bending mold for a workpiece, wherein the first and second rotating cams can be removed from the workpiece. 2. The work bending mold according to claim 1, wherein the first bent portion is a flange. The rotational axis of the first rotating cam and the second rotating cam is displaced so that the workpiece does not interfere with the rotational retraction locus of the entry forming portion of the second rotating cam. A bending mold for the workpiece according to 1 or 2.

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