JP2013193127A - Forming apparatus and forming method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a forming apparatus and a forming method capable of realizing highly accurate work to a workpiece at a low cost.SOLUTION: A forming apparatus includes: a multistage pressing device 1 arranged along a pressing direction and provided with a first die pair 10, a second die pair 20 and a third die pair 30; and a drawing device for performing drawing work of applying force including components in a direction orthogonal to the pressing direction to a workpiece. The drawing work of applying the force including the components in the direction orthogonal to the pressing direction is performed to the workpiece by the drawing device, and the work other than the drawing work is performed to the workpiece by the multistage pressing device 1.

Description

  The present invention relates to a molding apparatus and a molding method for molding a workpiece.

  2. Description of the Related Art Conventionally, a multi-stage press device in which a plurality of pairs of dies are provided along the vertical direction and presses a plurality of workpieces is widely known, and is used as a molding device for forming workpieces. .

  As shown in FIG. 3, the multistage press apparatus 100 is a multistage press apparatus that functions as a conventional molding apparatus, and includes a first mold pair 110, a second mold pair 120, a third mold pair 130, And a fourth mold pair 140.

The first mold pair 110 is a pair of molds for performing a drawing process on a workpiece that has not been processed by the multistage press apparatus 100.
The second mold pair 120 is a pair of molds for performing a punching / bending process on a workpiece that has been drawn by the first mold pair 110. Here, the punching / bending process is to simultaneously perform the punching process and the bending process along the press direction with a pair of molds.
The third mold pair 130 is a pair of molds for performing a punching / bending process on a workpiece that has been punched / bent by the second mold pair 120. Here, the punching / bending process is to perform the punching process and the bending process at the same time. The punching process is to perform a punching process along a direction including a component in a direction orthogonal to the press direction by a cam mold. The bending process is to perform a bending process along a direction including a component in a direction orthogonal to the press direction by a cam mold.
The fourth mold pair 140 is a pair of molds for performing a bending process on the workpiece subjected to the drawing / bending process by the third mold pair 130.

  As shown in FIG. 4, a final product is manufactured by sequentially performing drawing, punching / bending, punching / bending, and bending with the multistage press device 100 while replacing the workpiece. .

When a large part such as an automobile part is pressed by a multi-stage press apparatus such as the multi-stage press apparatus 100, the molding load becomes large. Therefore, the reaction force may cause an uneven load on the mold and the mold may be inclined. is there.
Since the inclination of the mold causes a reduction in processing accuracy or damage of a sliding portion in the multistage press apparatus, various techniques for suppressing the inclination of the mold have been proposed.

Patent Document 1 discloses a technique for suppressing the tilt of a mold by applying a force in a direction opposite to the tilt direction when the slide to which the mold is fixed is tilted.
However, it is necessary to connect a hydraulic pump or the like to an existing facility to form a complicated mechanism, which is disadvantageous in that it causes a significant increase in cost.

JP 2011-051104 A

  An object of the present invention is to provide a molding apparatus and a molding method capable of realizing high-precision machining of a workpiece at a low cost.

  A forming apparatus according to the present invention is a forming apparatus for forming a workpiece, and a multistage press apparatus having a plurality of pairs of molds arranged along a pressing direction, and the workpiece orthogonal to the pressing direction. A multi-stage press apparatus that performs a close process that applies a force including a direction component, and the multi-stage press apparatus performs a process other than the close process on the workpiece.

  In the molding apparatus according to the present invention, the plurality of pairs of molds in the multi-stage press apparatus includes a pair of molds for drawing the workpiece, a pair of molds for punching the workpiece, and the It is preferable to include at least one of a pair of dies for bending the workpiece.

  In the molding apparatus according to the present invention, the plurality of pairs of molds in the multi-stage press apparatus includes a pair of molds for drawing the workpiece, a pair of molds for punching the workpiece, It is preferable to include a pair of dies for bending the workpiece.

  The forming method according to the present invention is a forming method for forming a work, and performs a close process that applies a force including a component in a direction perpendicular to the press direction to the work by a close process apparatus, The multi-stage press apparatus having a plurality of pairs of molds arranged along the pressing direction performs processing other than the shifting processing on the workpiece.

  According to the molding apparatus and the molding method according to the present invention, it is possible to realize high-precision machining on a workpiece at a low cost.

The figure which shows the formation process of the workpiece | work by the shaping | molding apparatus which concerns on this invention. The figure which shows the multistage press apparatus which comprises a part of shaping | molding apparatus based on this invention. The figure which shows the multistage press apparatus as a conventional shaping | molding apparatus. The figure which shows the formation process of the workpiece | work by the multistage press apparatus as a conventional forming apparatus.

  Below, with reference to FIG.1 and FIG.2, the shaping | molding apparatus (henceforth only a "molding apparatus") which is one Embodiment of the shaping | molding apparatus which concerns on this invention is demonstrated.

As shown in FIG. 1, the forming apparatus produces a final product by sequentially performing drawing, punching, bending, and bending on a workpiece such as a steel plate.
The forming apparatus includes a multi-stage press apparatus 1 and a shift processing apparatus (not shown). The multi-stage press apparatus 1 performs drawing, punching, and bending, and performs the bending by the shift processing apparatus.
Here, the bending process is to perform a bending process along a direction including a component in a direction orthogonal to the pressing direction by a cam mold or the like.

First, the multistage press apparatus 1 will be described.
As shown in FIG. 2, the multistage press device 1 is a press device that presses three workpieces, and includes a first mold pair 10, a second mold pair 20, and a third mold pair 30. It comprises.
For convenience of explanation, the vertical direction in FIG. 2 is defined as the vertical direction of the multistage press apparatus 1. The vertical direction of the multistage press device 1 coincides with the pressing direction (the moving direction of a slide 80 described later).

  The first mold pair 10, the second mold pair 20, and the third mold pair 30 are arranged along the vertical direction, and perform predetermined processing on the corresponding workpieces.

The first mold pair 10 is a pair of molds for performing a drawing process on a workpiece that has not been processed by the molding apparatus. The first mold pair 10 includes a first lower mold 11 and a first upper mold 12.
The first lower mold 11 is a mold having a molding surface formed on the upper surface.
The first upper mold 12 is a mold having a molding surface formed on the lower surface, and is disposed above the first lower mold 11.

The second mold pair 20 is a pair of molds for performing a punching process on a workpiece that has been drawn by the first mold pair 10. The second mold pair 20 includes a second lower mold 21 and a second upper mold 22.
The second lower mold 21 is a mold having a molding surface formed on the upper surface.
The second upper mold 22 is a mold having a molding surface formed on the lower surface, and is disposed above the second lower mold 21.

The third mold pair 30 is a pair of molds for bending a workpiece that has been punched by the second mold pair 20. The third mold pair 30 includes a third lower mold 31 and a third upper mold 32.
The third lower mold 31 is a mold having a molding surface formed on the upper surface.
The third upper mold 32 is a mold having a molding surface formed on the lower surface, and is disposed above the third lower mold 31.

  The first mold pair 10, the second mold pair 20, and the third mold pair 30 configured as described above are movably supported by a support that forms part of the multistage press device 1. .

  The support body includes a bolster 40, a plurality of guide posts 50, 50..., A lower die plate 60, an upper die plate 70, and a slide 80.

  The bolster 40 is a rectangular plate material. The first lower mold 11 is fixed to the upper surface of the bolster 40.

The guide post 50 is a substantially columnar member extending along the vertical direction. The lower end portion of the guide post 50 is fixed to the bolster 40, and the upper end portion of the guide post 50 is fixed to a predetermined member (not shown) provided above the slide 80.
Although not shown, in the present embodiment, four guide posts 50, 50, 50, and 50 are provided and arranged at the four corners of the upper surface of the bolster 40.

The lower die plate 60 is a rectangular plate material. The first upper mold 12 is fixed to the lower surface of the lower die plate 60, and the second lower mold 21 is fixed to the upper surface of the lower die plate 60.
In the lower die plate 60, a plurality of through holes for inserting a plurality of guide posts 50, 50... Are formed along the vertical direction. In the present embodiment, four through holes for inserting the four guide posts 50, 50, 50, 50 are formed along the vertical direction at the four corners of the plate surface of the lower die plate 60. The lower die plate 60 is slidable along the vertical direction on the outer peripheral surfaces of the plurality of guide posts 50.

The upper die plate 70 is a rectangular plate material. The second upper mold 22 is fixed to the lower surface of the upper die plate 70, and the third lower mold 31 is fixed to the upper surface of the upper die plate 70.
In the upper die plate 70, a plurality of through holes for inserting a plurality of guide posts 50, 50... Are formed along the vertical direction. In the present embodiment, four through holes for inserting the four guide posts 50, 50, 50, 50 are formed along the vertical direction at the four corners of the upper die plate 70. The upper die plate 70 is slidable along the vertical direction on the outer peripheral surfaces of the plurality of guide posts 50.

  The slide 80 is a rectangular plate, and the third upper mold 32 is fixed to the lower surface thereof. In the slide 80, a plurality of through holes for inserting a plurality of guide posts 50, 50... Are formed along the vertical direction. In the present embodiment, four through holes for inserting the four guide posts 50, 50, 50, 50 are formed along the vertical direction at the four corners of the plate surface of the slide 80. The slide 80 slides along the vertical direction on the outer peripheral surfaces of the plurality of guide posts 50, 50... By an actuator (not shown) such as a hydraulic cylinder.

Next, a description will be given of the above-mentioned processing apparatus that constitutes a part of the forming apparatus.
The offset processing device is a device that performs a bending process on a workpiece that has been bent by the third mold pair 30 of the multistage press apparatus 1.
An existing roller hemming device or a one-stage press device having a pair of molds can be used as the shifting processing device.
However, it is preferable to employ a universally usable device such as an existing roller hemming device as the grouping device for cost reduction.

As described above, the forming apparatus performs drawing, punching, and bending with the multistage press apparatus 1, and performs bending with the offset processing apparatus (see FIG. 1).
That is, in the forming apparatus, the bending process is not performed by the multistage press apparatus 1.
This is because when a bending process is performed by a multistage press apparatus in which a plurality of pairs of dies are arranged in the pressing direction, such as the multistage press apparatus 1, a pair of molds that perform the bending process is replaced with another mold. This is because it is easy to cause an uneven load.
Specifically, as described above, the bending process is a processing method for applying a force including a component in a direction perpendicular to the press direction to the workpiece, and a plurality of pairs of molds arranged in the press direction, This is because when a force along a direction orthogonal to the pressing direction is generated, an uneven load is easily generated in the plurality of pairs of molds.

As described above, in the molding apparatus, the bending process that easily causes the uneven load on the plurality of pairs of dies arranged in the pressing direction is performed by the above-described aligning apparatus different from the multi-stage press apparatus 1, and the remaining processing is performed. Is performed by the multistage press apparatus 1.
Thereby, in the multistage press apparatus 1, it can suppress that a metal mold | die tilts by an offset load.
Therefore, the workpiece can be machined with high accuracy while reducing the cost required to suppress the inclination of the mold.
Moreover, the height (vertical dimension) of the multistage press apparatus 1 can be reduced by the die for performing the bending process, and the equipment cost can be reduced.

In the present embodiment, the grouping apparatus according to the present invention is an apparatus that performs the bending process, but the present invention is not limited to this configuration as long as the grouping process can be performed.
Here, the offset process is a process for applying a force including a component in a direction perpendicular to the press direction to the workpiece, and includes a bending process and a punching process. The punching process is to perform a punching process with a cam mold or the like along a direction including a component in a direction orthogonal to the pressing direction.
For example, the grouping apparatus according to the present invention may be an apparatus that performs a blanking process.

In the present embodiment, the first mold pair 10 performs drawing, the second mold pair 20 performs punching, and the third mold pair 30 performs bending. The configuration is not limited.
Any type of processing other than a squeezing process that applies a force including a component in a direction orthogonal to the press direction can be applied to a plurality of pairs of dies in the multistage press apparatus according to the present invention. The number of mold pairs provided in the multistage press apparatus according to the above is not limited. Along with this, the processing order of the workpieces in the forming apparatus can be changed as appropriate. Furthermore, it is possible to adopt a configuration in which a plurality of pairs of dies perform the same processing.
Here, the “processing other than shifting processing” performed by the multistage press apparatus according to the present invention is a processing method excluding a processing method that applies a force including a component in a direction orthogonal to the press direction to the workpiece. Specifically, drawing, punching, bending, and combinations thereof are included.

DESCRIPTION OF SYMBOLS 1 Multistage press apparatus 10 1st mold pair 11 1st lower mold 12 1st upper mold 20 2nd mold pair 21 2nd lower mold 22 2nd upper mold 30 3rd mold pair 31 3rd lower mold 32 3rd Upper mold

Claims (4)

A molding apparatus for molding a workpiece,
A multi-stage press apparatus having a plurality of pairs of dies arranged along the press direction; and a shift processing apparatus that performs a shift process that applies a force including a component in a direction perpendicular to the press direction to the workpiece. And
The multi-stage press device performs processing other than the shifting processing on the workpiece.
A molding apparatus characterized by that. The plurality of pairs of dies in the multistage press apparatus are:
Including at least one of a pair of molds for drawing the workpiece, a pair of molds for punching the workpiece, and a pair of molds for bending the workpiece;
The molding apparatus according to claim 1. The plurality of pairs of dies in the multistage press apparatus are:
A pair of dies for drawing the workpiece;
A pair of dies for punching the workpiece;
A pair of dies for bending the workpiece,
The molding apparatus according to claim 1 or 2, characterized in that A molding method for molding a workpiece,
With a grouping device, the workpiece is subjected to a grouping process that applies a force including a component in a direction perpendicular to the press direction,
By a multistage press device having a plurality of pairs of dies arranged along the pressing direction, the workpiece is processed other than the offset processing.
A molding method characterized by the above.

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