JP2004188476A - Pressing machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pressing machine capable of accurately mounting a rotary die at a normal pressing position so that the rotary die and a forming die portion are prevented from a direct contact with each other and causing damage. <P>SOLUTION: The pressing machine comprises a rotary die 2 mounted on a lower die set 1, a pushing die portion 4a arranged on a vertically moving upper die set 4 and putting a pressed plate 5 between the rotary die 2 and the pushing die portion 4a, and a forming die portion 4b arranged on the upper die set 4 and forming the pressed plate 5 in cooperation with the rotary die 2 while the pressed plate 5 is sandwiched between the rotary die 2 and the pushing die portion 4a. The machine also comprises a driving cam member 16 arranged on the upper die set 4 and moving up and down in connection with moving up and down actions of the pushing die portion 4a, a driven cam member 10 arranged on the lower die set 1 and movable to a direction crossed with a moving direction of the driving cam member 16, and an urging means 13 letting the moved driven cam member 10 return an initial position. The driven cam member 10 is advanced to the rotary die 2 by means of the driving cam member 16 moving in cooperation with fall of the pushing die portion 4a, and the rotary die 2 is arranged at the pressing position so as to rotate the rotary die 2 by bringing into press contact with the driven cam member 10. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a press forming apparatus, and more particularly to a press forming apparatus formed so as to be suitable for press forming of, for example, a fender or a pillar of an automobile.
[0002]
[Prior art]
Conventional devices of this type include, for example, a rotary die provided on a lower die, a holding die portion provided on an ascending and descending upper die and sandwiching a plate material to be formed between the rotary die and the upper die. And a forming die portion for forming the forming plate material in cooperation with the rotary die in a state where the forming plate material is sandwiched between the rotary mold and the holding die portion. There is a press forming apparatus (for example, see Patent Document 1).
[0003]
[Patent Document 1]
JP 2001-347319 A
[Problems to be solved by the invention]
Conventionally, this type of apparatus usually rotates a rotary mold between a molding position and a non-molding position by an air cylinder device or the like. Therefore, for example, when a timing failure of air supply of the air cylinder occurs, there has been a risk that the molding operation by the upper mold is performed immediately before the rotary mold is rotated to the normal processing position. Therefore, when the conventional apparatus is used, there is a problem that the front end of the upper mold part collides (contacts) with the rotary mold, and the corners of the mold part and the rotary mold are damaged.
[0005]
The present invention has been proposed in view of such problems of the related art.
Therefore, a technical problem of the present invention is to provide a press molding apparatus formed such that the rotary mold can be accurately arranged at a regular processing position so that the rotary mold and the mold section do not come into contact with each other at the time of molding and are damaged. It is in.
[0006]
[Means for Solving the Problems]
The present invention employs the following technical means in order to solve the above problems. That is, as shown in FIG. 1 and the like, the present invention provides a plate material to be formed between a rotary die 2 provided on a lower die 1 and an upper die 4 which moves up and down, and the rotary die 2 described above. 5 is provided on the upper mold 4 and cooperates with the rotary mold 2 in a state in which the plate material 5 is sandwiched between the rotary mold 2 and the press mold 4a. And a molding die portion 4b for molding the plate material 5 to be molded. A driving cam provided on the upper die 4 and raised and lowered in conjunction with the lifting and lowering operation of the holding die portion 4a. A member 16, a driven cam member 10 provided on the lower mold 1 and movable in a direction intersecting with the moving direction of the driving cam member 16, and returning the moved driven cam member 10 to an initial position. And the driven cam member 10 is provided with The rotary cam 2 is advanced toward the rotary mold 2 by the drive cam member 16 that moves in conjunction with the lowering of the mold section 4a, and the rotary mold 2 is pressed and rotated to dispose the rotary mold 2 at a predetermined forming position. (Claim 1).
[0007]
According to the above-described present invention, the rotary mold 2 is rotated in conjunction with the lifting and lowering operation of the press mold 4a of the upper mold 4, and the rotary mold 2 is put together with the press mold 4a of the upper mold 4 in the proper molding processing position. Placed in On the other hand, the molding die portion 4b of the upper die 4 moves to the molding operation after the pressing die portion 4a is disposed at the regular position, and therefore, the molding die portion 4b cooperates with the rotary mold 2 disposed at the regular molding processing position. Work is performed. As described above, according to the present invention, the rotary mold 2 works in conjunction with the pressing mold portion 4a of the upper mold 4 to ensure that the rotary mold 2 is at the proper molding processing position before the molding work of the molding mold portion 4b of the upper mold 4 is performed. Since it is arranged, the molding die 4b of the upper die 4 and the rotary die 2 are prevented from contacting and being damaged during molding.
[0008]
In the case of the present invention, it is preferable that the driving cam member 16 is configured to be slidable on a sliding surface formed on the lower mold 1 (claim 2).
This is because, according to this, the press pressure applied to the rotary mold 2 can be received by the lower mold 1 via the driven cam member 10 and the drive cam member 16.
[0009]
Further, in the present invention, it is preferable that the inclined cam surfaces 17, 18 which come into contact with each other at the time of the initial operation are formed on the driving cam member 16 and the driven cam member 10 respectively (claim 3).
This is because according to this, the cam members 10 and 16 can be smoothly operated, the consumption of the cam members 10 and 16 can be prevented, and the durability is improved.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, a preferred embodiment of the present invention will be described with reference to the accompanying drawings.
[0011]
1 and 2, reference numeral 1 denotes a lower mold. The lower die 1 includes a rotary die 2, and the rotary die 2 is provided in a cavity 3 provided above the lower die 1 so as to be rotatable about an axis P. The rotary mold 2 is rotated to a press forming position (see the state of FIG. 1) at the time of press forming, and is rotated to a release position (see the state of FIG. 2) after the press forming.
[0012]
Reference numeral 4 denotes an upper die arranged above the lower die 1. The upper die 4 includes a pressing die portion 4a for holding a metal plate material as the molded plate material 5 between the rotary die 2 and the pressing die portion 4a, and a molding die material 5 between the rotary die 2 and the pressing die portion 4a. And a forming die portion 4b for forming the plate material 5 in cooperation with the rotary die 2 in the sandwiched state. The upper mold 4 is configured to move up and down, and the holding mold section 4a and the forming mold section 4b move up and down together. However, the molding die portion 4b is configured to further perform a horizontal reciprocating operation in a state where the plate material 5 to be molded is sandwiched between the rotary die 2 and the pressing die portion 4a. That is, the forming die portion 4b is configured to advance toward the rotary die 2 when forming the plate material 5 in cooperation with the rotary die 2, and to retract when forming and then releasing the mold. .
[0013]
The rotary mold 2 is supported on a vertical bearing surface 6 during press forming. This bearing surface 6 is a vertical wall forming the cavity 3 of the lower mold 1. Reference numeral 7 denotes a horizontal bearing surface for supporting the rotary mold 2 during press forming. The bearing surface 7 is the upper surface of a bearing portion 7a which is provided so as to protrude from a horizontal wall forming the cavity 3 of the lower mold 1.
[0014]
Reference numeral 8 denotes a vertical contact surface formed on the rotary mold 2. The contact surface 8 is formed on a contact portion 8a protrudingly provided on the rotary mold 2, and comes into contact with the vertical bearing surface 6 of the lower mold 1 during press molding. 9 is a horizontal contact surface formed on the rotary mold 2. The contact surface 9 is formed so as to contact the horizontal bearing surface 7 of the lower die 1 during press forming. The contact surface 9 is a lower surface of a contact portion 9 a protruding from the lower surface of the rotary mold 2.
[0015]
As shown in FIG. 1, the vertical contact surface 8 of the rotary die 2 is disposed below a horizontal line H passing through the axis P of the rotary die 2. The horizontal contact surface 9 of the rotary die 2 is disposed at a position closer to the right side in the drawing than a vertical line L passing through the axis P of the rotary die 2.
[0016]
Reference numeral 10 denotes a driven cam member provided on the lower mold 1. The driven cam member 10 is mounted on a horizontal surface of the lower die 1 and is configured to be able to move forward and backward with respect to the rotary die 2. Reference numeral 11 denotes a vertical pressing surface formed on the front end of the driven cam member 10 on the rotary mold 2 side. The pressing contact surface 11 is also a vertical bearing surface for supporting the rotary mold 2 at the time of press forming, and is formed on a pressing contact portion 11 a protruding from the front wall of the driven cam member 10. .
[0017]
Reference numeral 12a denotes a contact portion protrudingly provided on the surface of the rotary mold 2 facing the pressing contact portion 11a of the driven cam member 10. The contact portion 12a is for rotating the rotary mold 2 by the contact surface 11 of the driven cam member 10 being in contact therewith, and is also a vertical member for the contact surface 11 of the driven cam member 10 to contact during press forming. The contact surface 12 is provided.
[0018]
Reference numeral 13 denotes an urging means for returning the driven cam member 10 advanced toward the rotary mold 2 to an initial position. The biasing means 13 is fixed to a concave portion 14 provided below the driven cam member 10 in the lower mold 1, and a mounting member 15 projecting downward from a lower surface of the driven cam member 10 is attached to the biasing means 13. Fixed to. The urging means 13 includes a coil spring in this embodiment, and is formed so as to return the driven cam member 10 by the restoring force of the coil spring.
[0019]
Reference numeral 16 denotes a driving cam member provided on the upper die 4. The drive cam member 16 is formed so as to move up and down in conjunction with the elevating operation of the pressing die portion 4a of the upper die 4. The driven cam member 10 is advanced toward the rotary mold 2 by the lowering operation of the drive cam member 16, presses the rotary mold 2 to rotate it by a predetermined angle, and arranges the rotary mold 2 at the forming position. Accordingly, the driving cam member 16 and the driven cam member 10 are formed with mutually inclined cam surfaces 17 and 18 so that the driven cam member 10 advances toward the rotary mold 2 in accordance with the descending operation of the driving cam member 16. ing. The inclined cam surface 17 of the driving cam member 16 is formed at the lower end of the surface of the driving cam member 16 on the side of the driven cam member 10. The inclined cam surface 17 is formed as a downwardly inclined surface so as to gradually move away from the driven cam member 10 in the descending direction of the drive cam member 16. On the other hand, the inclined cam surface 18 of the driven cam member 10 is formed at the upper end of the surface of the driven cam member 10 on the drive cam member 16 side. The inclined cam surface 18 is formed as an inclined surface that gradually rises in the forward direction of the driven cam member 10 toward the upward direction of the drive cam member 16.
[0020]
19 is a vertical bearing surface formed on the drive cam member 16. The bearing surface 19 is a front surface of a bearing portion 19 a formed in a vertical step on the vertical wall of the driving cam member 16 on the driven cam member 10 side.
[0021]
Reference numeral 20 denotes a vertical contact surface formed on the driven cam member 10. The contact surface 20 is formed so as to contact the vertical bearing surface 19 of the drive cam member 16 during press forming. The contact surface 20 is formed on a contact portion 20 a provided on the surface of the driven cam member 10 on the drive cam member 16 side in a convex step shape.
[0022]
The drive cam member 16 slides on the vertical bearing surface 21 of the lower die 1 and moves up and down. The bearing surface 21 is a front surface of a bearing portion 21a formed on the vertical wall of the lower mold 1 in a convex step shape.
[0023]
Reference numeral 22 denotes a vertical contact surface formed on the drive cam member 16. The contact surface 22 is formed on a surface of the drive cam member 16 opposite to the driven cam member 10. The contact surface 22 is formed in a contact portion 22 a provided on the vertical wall of the drive cam member 16 in a convex step shape.
[0024]
Next, the operation of the present invention will be described.
[0025]
First, an operator sets the pre-processed plate material 5 on the forming surface of the rotary die 2 of the lower die 1. In this state, the upper die 4 descends, and the pressing die 4a and the molding die 4b are set at predetermined positions. At this time, the drive cam member 16 of the upper die 4 also moves down in conjunction with the lowering operation of the presser die 4a. The driven cam member 10 advances toward the rotary mold 2 through the contact of the inclined cam surfaces 17 and 18 with the downward movement of the drive cam member 16, presses the rotary mold 2 to rotate the rotary mold 2 by a predetermined angle, and rotates the rotary mold 2 by a predetermined angle. 2 is arranged at the forming position. Then, the molding plate 5 is sandwiched and fixed between the rotary mold 2 and the holding mold portion 4a. Next, the forming die portion 4b of the upper die 4 advances toward the rotary die 2, and forms the plate material 5 to be formed. At this time, the press pressure applied to the rotary mold 2 is received by the support 21a of the lower mold 1 via the driven cam member 10 and the drive cam member 16.
[0026]
When the press forming operation is completed, the forming die portion 4b of the upper die 4 retreats, and then the pressing die portion 4a rises together with the upper die 4 and is separated from the lower die 1. Further, the drive cam member 16 also moves up in conjunction with the rise of the holding die portion 4a, and separates from the driven cam member 10. As a result, the driven cam member 10 becomes movable, and is retracted to the initial position by the urging means 13. As a result, the rotary mold 2 becomes free, and is rotated counterclockwise by a predetermined angle by a cylinder device or the like (not shown) for releasing the mold, and is separated from the plate material 5.
[0027]
【The invention's effect】
As described above, the apparatus of the present invention is configured such that the driven cam member is advanced toward the rotary mold by the drive cam member that moves up and down in conjunction with the holding mold portion of the upper mold, and the rotary mold is set at a predetermined forming position. It is formed so that.
Therefore, in the case of the present invention, the rotary mold can be surely set to the proper processing position before the molding operation by the upper mold part. As a result, according to this, at the time of molding, the problem that the upper mold part collides (contacts) with the corner of the rotary mold and damages the corner can be solved.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view of a main part at the time of press molding showing a preferred embodiment of the apparatus of the present invention.
FIG. 2 is a vertical cross-sectional view of a main part at the time of mold release after press molding of the above device.
[Explanation of symbols]
REFERENCE SIGNS LIST 1 lower die 2 rotary die 4 upper die 4a presser die 4b forming die 5 molded plate 10 driven cam member 13 biasing means 16 drive cam member

Claims (3)

The pressing die portion provided on the lower die and the rotating die and the upper die that moves up and down, and sandwiches the plate material between the rotating die and the pressing die portion provided on the upper die and the forming plate material is A press forming apparatus formed with a forming die portion for forming a plate material to be formed in cooperation with the above rotary die in a state sandwiched between the rotary die and the holding die portion; A driving cam member provided on the mold and moving up and down in conjunction with the lifting and lowering operation of the presser mold portion; and a driven cam member provided on the lower mold and movable in a direction intersecting the moving direction of the driving cam member. And a biasing means for returning the moved follower cam member to the initial position, wherein the follower cam member is of a rotary type by a drive cam member that moves in conjunction with the lowering of the holding die portion. To the rotary mold, press and rotate the rotary mold, rotate Press forming apparatus for causing disposed molding position. The press forming apparatus according to claim 1, wherein the driving cam member is configured to be slidable on a sliding surface formed on a lower die. 3. The press forming apparatus according to claim 1, wherein the driving cam member and the driven cam member are formed with inclined cam surfaces that come into contact with each other at an initial operation.

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