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Press-processing method, and press-processing apparatus

一种冲压成形、压边的技术，应用在冲压成形及冲压成形装置领域，能够解决难以应用等问题，达到提高稳定性的效果

Inactive Publication Date: 2010-10-20
TOYOTA JIDOSHA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is difficult to apply the prior art in the case where the molded product is a complex shape product, or in the case where the blanked part is used as a part of the product

Method used

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  • Press-processing method, and press-processing apparatus
  • Press-processing method, and press-processing apparatus
  • Press-processing method, and press-processing apparatus

Examples

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Comparison scheme
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Embodiment Construction

[0032] In the present invention, in press forming in which a plate-shaped blank (blank) is drawn into a predetermined shape having a relatively complicated curved surface shape, when performing blank-holding of the blank before drawing, such as a punch, etc. act on the blank, based on Due to the difference in the forming amount (drawing depth) of the blank due to the above-mentioned asymmetrical predetermined shape, the blank is subjected to two-stage blank-holding at different timings for each part. Then, deformation is applied to the blank in the state where the previous hemming is performed when the subsequent hemming is performed.

[0033]Specifically, when the latter blanking is performed, the billet that is flat at the time when the previous blanking is performed starts from the part on the side where the latter blanking is performed, and for the blank that was clamped by the previous blanking, Partially deformed to one side in the drawing direction. Here, the deformati...

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Abstract

This aims to provide a press process for drawing a plate material (50) into a predetermined shape. This press process performs a first unwrinkling treatment and a second unwrinkling treatment sequentially for unwrinkling the material (50). Between these first and second unwrinkling treatments, an introduction for deforming the material (50) is made so that the portion of the material (50) on the side to be subjected to the second unwrinkling treatment may be positioned on the side of a drawing direction with respect to the portion subjected to the first unwrinkling treatment. This first unwrinkling treatment is made on such a portion to be unwrinkled in the material (50) as is located on the side of a larger drawing depth for the predetermined shape. On the other hand, the second unwrinkling treatment is made on such a portion to be unwrinkled as is located on the side of a smaller drawing depth. The press process is advantageous for the cracks or wrinkles of the material, if the molding has a relatively complicated curve shape so that the drawing quantity (or the drawing depth) of the material to be drawn is not homogeneous, so that the press process can improve the pressing stability.

Description

technical field [0001] For example, the present invention relates to a press forming method and a press forming apparatus suitable for forming a product having a relatively complicated curved surface shape, such as a body panel member forming an automobile body, by deep drawing. Background technique [0002] For example, when manufacturing a body panel member or the like forming an automobile body, drawing (deep drawing) as press forming is performed. Generally, in deep drawing, a forming device having the following parts is used: a punch called a punch or the like, a die called a die or the like arranged opposite to the punch, and clamped together with the die. The blank holder is called a cushion or the like. With this device, a flat material (blank) such as a metal plate is formed into a predetermined shape. That is, when drawing is performed, the punch and the die are relatively close to each other in a state where the periphery of the blank is clamped by the blank hol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21D24/04
CPCB21D53/88B21D22/02B21D24/04B21D22/26B21D24/02B21D22/06
Inventor 久保正男
Owner TOYOTA JIDOSHA KK
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