JP3861578B2 - Press mold equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a press mold apparatus for forming an edge of a panel constituting a body of an automobile, for example.
[0002]
[Prior art]
For example, when manufacturing a fender panel or the like constituting a part of an automobile body, a press mold apparatus is used to bend the edge of the panel toward the inside of the vehicle body. In a mold apparatus that performs this type of bending process, a rotary mold is sometimes used to be able to remove the panel from the mold after bending the edge of the panel.
[0003]
The rotary mold provided in the fixed mold can be rotated between the machining position and the non-machining position, and when moved to the machining position, the molding surface of the rotary mold is continuous with the molding surface of the fixed mold. . The panel is placed on these molding surfaces, the upper die pad is lowered, the panel is sandwiched, and the edge of the panel is bent by a movable die that moves in the horizontal direction. After that, the rotary mold is rotated to the non-working position to avoid interference between the edge of the panel and the rotary mold, and then the panel is taken out.
[0004]
[Problems to be solved by the invention]
The rotary mold is rotatably fitted in a recess having an arcuate inner peripheral surface formed in a fixed mold. For this reason, in order to smoothly rotate the rotary mold, a certain gap is required between the inner peripheral surface of the recess and the outer peripheral surface of the rotary mold. However, if this gap is too wide, when the rotary mold is moved to the processing position, a step or gap is formed between the molding surface of the fixed mold and the molding surface of the rotary mold, and the panel is pressed against these molding surfaces. This is a cause of forming defects such as scratches and deformation. However, if the gap is brought close to zero, the rotary mold cannot be smoothly rotated, and it is extremely high when machining relative rotating parts such as the outer peripheral surface of the rotary mold and the inner surface of the fixed mold. Accurate machining is required, and the cost is significantly increased.
[0005]
Accordingly, it is an object of the present invention to provide a press mold apparatus that does not cause defective molding of the panel and facilitates the production of the mold.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a fixed mold having a molding surface with which a panel is in contact with the fixed mold, and the fixed mold is provided at a machining position so as to be rotatable about an axis. A rotary mold having a molding surface that is in contact with the panel, a pad provided on an upper mold that moves up and down, and sandwiching the panel between the molding surfaces of the fixed mold and the rotary mold, and the panel includes the pad and the pad A movable mold that bends the edge of the panel in cooperation with the rotary mold by interlocking with the elevation of the upper mold in a state of being sandwiched between the molding surfaces; The first support surface, which is located below the shaft and is formed of a flat surface along the vertical direction, the second support surface along the horizontal direction, and the first support surface which is inclined upward from the second support surface. 3 support surfaces and the rotor The mold includes a planar first receiving surface and a second receiving surface that are in contact with the first support surface, the second support surface, and the third support surface, respectively, in a state where the rotary mold is moved to the processing position. And a third receiving surface, and the first, second and third receiving surfaces are respectively formed on the fixed die forming surface and the rotary die in a state where the rotary die is moved to the processing position. It is a press die apparatus characterized by being comprised so that a surface may mutually continue. In the press mold apparatus of the present invention, when the rotary mold is in the processing position, the first support surface comes into contact with the first receiving surface, and the second support surface comes into contact with the second receiving surface, thereby fixing the rotary die. The position of the molding surface of the rotary mold with respect to the molding surface of the mold is accurately regulated. For this reason, it is avoided that a level | step difference and a clearance gap arise between a molding surface of a fixed mold | type and a molding surface of a rotary mold | type.
[0007]
When the rotary mold moves between the machining position and the non-machining position, the first and second support surfaces are separated from the first and second receiving surfaces, respectively, and the rotary mold rotates about the axis. For this reason, there is no problem even if the tolerance of the relative rotation portion between the fixed mold and the rotary mold is large, and it becomes easy to manufacture the fixed mold and the rotary mold, and the rotary mold can rotate smoothly.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings. The press die apparatus 10 of this embodiment is used for forming the edge 1a of the panel 1 as an example of a workpiece indicated by a two-dot chain line in FIG. An example of the panel 1 is a front fender panel of an automobile, and as shown in FIG. 2 and the like, a main portion 1b excluding the edge portion 1a is previously formed into a predetermined product shape by a press or the like.
[0009]
The mold apparatus 10 includes a lower mold unit 11 and an upper mold 12 that moves in the vertical direction with respect to the lower mold unit 11. The lower mold unit 11 includes a fixed mold 15 and a rotary mold 17 provided in the recess 16 of the fixed mold 15. A molding surface 20 on which the panel 1 is placed is formed on the upper part of the fixed mold 15. The molding surface 20 has a shape corresponding to the main portion 1b of the panel 1 which is previously molded by pressing or the like.
[0010]
The rotary mold 17 has a shaft 25 extending in the horizontal direction. The shaft 25 is supported by a bearing portion 26 (shown in FIG. 1) provided in the lower mold unit 11 so as to be rotatable about the axis X in the direction of arrow A (shown in FIG. 2), and is a hydraulic pressure that is an example of a drive unit. Switching between the non-machining position shown in FIG. 2 and the machining position shown in FIG. 3 is enabled by a drive mechanism 27 such as a cylinder. A play is provided between the shaft 25 of the rotary die 17 and the bearing portion 26 so that the rotary die 17 can move to some extent in the radial direction of the shaft 25 when the rotary die 17 rotates.
[0011]
The rotary mold 17 has a molding surface 30 adjacent to the molding surface 20 of the fixed mold 15 when in the processing position, and a molding surface 31 for forming a blind spot having a shape corresponding to the edge 1a of the panel 1 to be molded. have. The molding surface 30 has a shape corresponding to the main portion 1b of the panel 1 placed thereon.
[0012]
The upper die 12 that moves up and down is provided with a pad 35 that sandwiches the main portion 1b of the panel 1 between the molding surfaces 20 and 30 when the upper die 12 is lowered. The lower surface 35 a of the pad 35 has a shape corresponding to the main portion 1 b of the panel 1, that is, a shape that matches the molding surfaces 20 and 30. The pad 35 is biased downward by a biasing member 36 such as a spring.
[0013]
A movable mold 40 is provided on the upper mold 12. The movable mold 40 is movable in the direction indicated by the arrow B in FIG. 2 along the cam surface 41 formed on the upper mold 12, and is biased upward by a biasing means (not shown). The cam surface 41 has a shape that is inclined in the vertical direction such that one end 41a side is lower than the other end 41b side. On the front end side of the movable mold 40, a blade 42 having a shape corresponding to the edge 1a of the panel 1 to be molded is provided.
[0014]
In a state where the panel 1 is sandwiched between the pad 35 and the molding surfaces 20 and 30, the movable mold 40 is different from the moving direction (downward direction) of the upper mold 12 (in this embodiment, FIG. 5). The edge portion 1a of the panel 1 is sandwiched between the blade portion 42 and the molding surface 31 of the rotary mold 17 so that the edge portion 1a is molded. .
[0015]
The inner surface of the concave portion 16 of the fixed mold 15 includes a first support surface 51 formed of a plane extending in the vertical direction (for example, the vertical direction) and a plane extending in a direction different from the first support surface 51 (for example, the horizontal direction). A second support surface 52 that functions as the second second support surface and a third support surface 53 that functions as the second second support surface are formed by a plane inclined upward from the second support surface 52. Has been.
[0016]
The rotary die 17 functions as a flat first receiving surface 61 that contacts the first support surface 51 when the rotary die 17 moves to the processing position, and the first second receiving surface. A planar second receiving surface 62 that abuts against the second support surface 52 and a planar third receiving surface 63 that functions as a second second receiving surface and abuts against the third support surface 53. Is provided. These receiving surfaces 61, 62, 63 are formed on shims 64, 65, 66. Each of the shims 64, 65, 66 has a molding surface 20 of the fixed mold 15 and a molding surface 30 of the rotary mold 17 in a state where the support surfaces 51, 52, 53 and the receiving surfaces 61, 62, 63 are in surface contact. Each thickness is adjusted so that there is no substantial step or gap between them and the two continue.
[0017]
Next, the operation of the press die apparatus 10 having the above configuration will be described.
As shown in FIG. 3, when the rotary die 17 is moved to the machining position by the drive mechanism 27, the receiving surfaces 61, 62, 63 of the rotary die 17 become support surfaces 51, 52, 53 of the fixed die 15, respectively. Surface contact. Here, since there is a certain amount of play between the shaft 25 of the rotary die 17 and the bearing portion 26, the vertical position of the rotary die 17 with respect to the fixed die 15 is regulated by the second support surface 52 and the receiving surface 62. . Further, the position of the rotary die 17 in the horizontal direction with respect to the fixed die 15 is accurately regulated by the first support surface 51 and the receiving surface 61 and the third support surface 53 and the receiving surface 63.
[0018]
That is, by managing the positions of the receiving surfaces 61, 62, 63 according to the thickness of the shims 64, 65, 66 with high accuracy, the molding surface 30 in the vertical direction and the horizontal direction at the processing position of the rotary die 17 is controlled. Since the position in the direction can be regulated with high accuracy, it is possible to avoid the occurrence of a step or a gap in the boundary portion P between the molding surface 20 of the fixed mold 15 and the molding surface 30 of the rotary mold 17.
[0019]
Moreover, when the rotary die 17 rotates between the machining position and the non-machining position, the dimensional tolerance of the relatively rotating portion such as the inner surface of the concave portion 16 of the fixed die 15 and the outer surface of the rotary die 17 is set to the conventional rotary. It can be made larger than the dimensional tolerance of the relative rotation portion of the mold, and the machining accuracy of the fixed mold 15 and the rotary mold 17 is reduced correspondingly, and the molds 15 and 17 can be easily manufactured.
[0020]
As shown in FIG. 3, the rotary mold 17 is moved to the processing position, and the panel 1 is placed on the molding surface 20 of the fixed mold 15 and the molding surface 30 of the rotary mold 17, and then shown in FIG. Thus, the upper mold 12 is lowered to the intermediate position. At this time, the pad 35 comes into contact with the panel 1, and the panel 1 is sandwiched between the pad 35 and the molding surfaces 20 and 30, and the lower surface of the movable mold 40 is the guide surface 70 of the fixed mold 15 and the guide surface of the rotary mold 17. It contacts 71.
[0021]
When the upper mold 12 further descends and reaches the descending end shown in FIG. 5, the movable mold 40 moves relative to the other end 41b from the one end 41a along the cam surface 41 while the urging member 36 is compressed in the process. As a result, the blade portion 42 of the movable die 40 advances in the horizontal direction (the direction indicated by the arrow D) toward the molding surface 31 of the rotary die 17. And the edge part 1a of the panel 1 is shape | molded by the blade part 42 and the shaping | molding surface 31 cooperating.
[0022]
After the edge portion 1a is molded, the upper mold 12 returns to the raised position shown in FIG. 2, and the rotary mold 17 is moved to the non-working position by the drive mechanism 27. The rotary die 17 is retracted so that the edge portion 1a of the panel 1 does not interfere with the molding surface 31 of the rotary die 17 so that the panel 1 can be taken out. And a series of press processes are complete | finished by taking out the panel 1. FIG.
[0023]
In carrying out the present invention, a fixed mold, upper mold, rotary mold, drive means, molding surface, pad, movable mold, first, second, and third support surfaces, as well as the form of the panel to be molded, are included. Needless to say, the elements constituting the present invention such as the first, second, and third receiving surfaces corresponding to the above can be appropriately modified and implemented.
[0025]
【The invention's effect】
According to the first aspect of the present invention, when the rotary die is moved to the processing position, the three receiving surfaces of the rotary die are in surface contact with the support surface of the fixed die, respectively, and the upper and lower sides of the rotary die with respect to the fixed die. The direction position is regulated by the second support surface and the second receiving surface. Further, the horizontal position of the rotary mold relative to the fixed mold is accurately regulated by the first support surface, the first receiving surface, the third support surface, and the third receiving surface, and the fixed mold forming surface and the rotary mold forming surface are controlled. It is possible to avoid the occurrence of a step or a gap at the boundary portion. For this reason, it is possible to prevent the occurrence of defective molding when molding the panel, and it is possible to increase the tolerance between the molds when the rotary mold rotates between the processing position and the non-processing position. Is easy to manufacture.
According to the invention described in claim 2, since the rotary mold can move to some extent in the radial direction of the shaft by having play between the shaft and the bearing portion, it is not affected by the restriction of the shaft or the bearing portion. The horizontal position of the rotary mold relative to the fixed mold is accurately regulated by the first support surface and the first receiving surface, and the third support surface and the third receiving surface.
According to the third aspect of the invention, the position of the receiving surface is controlled with high accuracy according to the thickness of the shim, so that the vertical and horizontal positions of the molding surface at the processing position of the rotary mold are obtained. Is regulated with high accuracy.
[Brief description of the drawings]
FIG. 1 is a plan view of a lower mold unit of a press mold apparatus showing an embodiment of the present invention.
FIG. 2 is a cross-sectional view of a mold apparatus taken along line II-II in FIG.
3 is a cross-sectional view showing a state where a rotary mold of the mold apparatus shown in FIG. 2 is moved to a machining position.
4 is a cross-sectional view showing a state where an upper mold of the mold apparatus shown in FIG. 2 is lowered to an intermediate position.
5 is a cross-sectional view showing a state where an upper mold of the mold apparatus shown in FIG. 2 is lowered to a lower end.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Panel 1a ... Edge 10 ... Mold apparatus 12 ... Upper mold 15 ... Fixed mold 17 ... Rotary mold 20 ... Molding surface 27 ... Drive mechanism (drive means)
DESCRIPTION OF SYMBOLS 30 ... Molding surface 35 ... Pad 40 ... Movable mold 51 ... 1st support surface 52 ... 2nd support surface 61 ... 1st receiving surface 62 ... 2nd receiving surface

Claims (3)

A fixed mold having a molding surface with which the panel contacts;
A rotary mold provided on the fixed mold so as to be rotatable about an axis and having a molding surface with which the panel contacts when in a processing position;
A pad provided on the upper mold that moves up and down, and sandwiching the panel between the molding surfaces of the fixed mold and the rotary mold;
A movable mold that bends the edge of the panel in cooperation with the rotary mold by interlocking with the raising and lowering of the upper mold when the panel is sandwiched between the pad and each molding surface. And
The fixed mold is located below the shaft, and has a first support surface formed of a plane extending in the vertical direction, a second support surface extending in the horizontal direction, and inclined upward from the second support surface. Forming a third support surface comprising a flat surface , and
The rotary mold includes a planar first receiving surface and a second receiving surface that are in contact with the first support surface, the second support surface, and the third support surface, respectively , when the rotary mold is moved to the processing position . A receiving surface and a third receiving surface are provided, and the first, second, and third receiving surfaces are respectively the molding surface of the fixed die and the rotary die when the rotary die is moved to the processing position. A press mold apparatus characterized in that the molding surface is continuous with each other . It is a press die apparatus of Claim 1, Comprising:
A press comprising a bearing portion that is provided in a lower mold unit including the fixed mold having the molding surface with which the panel is in contact, and supports the shaft in a state where play is provided so that the shaft can move in a radial direction. Mold equipment. The press mold apparatus according to claim 1 or 2,
Each of the first, second, and third receiving surfaces has a thickness such that the molding surface of the fixed mold and the molding surface of the rotary mold are continuous with each other in a state where the rotary mold is moved to the processing position. A press mold apparatus, wherein a shim is formed in an adjusted shim.

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