Hydraulic pressure molding device and hydraulic pressure molding method

Abstract

A hydraulic pressure molding device (A) and a hydraulic pressure molding method for molding a molded body of a specified shape by holding a material plate (1) by a first mold (10) pressing the material plate (1) with a pressurized liquid medium (2) and a second mold (20) in which a molding recessed surface (21) of a specified shape is formed and pressing the material plate (1) with the liquid medium (2) to bring the material plate (1) into contact with the molding recessed surface (21). The second mold (20) comprises deformation resistance adjusting means (22) and (23) locally differentiating the deformation resistance of the material plate (1). The deformation resistance adjusting means (22) and (23) are formed of a local cooling means (22) locally cooling the material plate (1) and a local heating means (23) locally heating the material plate (1). In addition, the deformation resistance adjusting means (22) and (23) are formed movable forward and backward relative to the second mold (20).

Description

technical field [0001] The present invention relates to a hydraulic pressure molding device (hydraulic pressure molding device) and a hydroforming method for extruding a plate-shaped blank into a predetermined shape. Background technique [0002] Conventionally, as a method of forming a blank sheet made of plate material such as a metal plate into a predetermined shape, press working of a blank sheet is performed using a mold. [0003] As one of the above-mentioned press workings, a hydroforming apparatus described in JP-A-6-304672 is used. [0004] In such a hydroforming device, the liquid medium for extruding the blank sheet can be supplied to the first mold under high pressure, and the second mold is provided with a forming material formed into a predetermined shape on the contact surface with the blank sheet. The concave surface is clamped by the first mold and the second mold, and the liquid medium is injected into the first mold, and the liquid medium presses the blan...

AI Technical Summary

Problems solved by technology

[0005] However, although a large amount of deformation can be obtained by using such a hydroforming device, it is necessary to uniformly strain the entire blank sheet in order to obtain a large amount of deformation, so that there is a problem that the kinds of shapes that can be formed are limited

[0006] In particular, the use of aluminum alloy materials has been realized for the purpose of weight reduction in the recent stage, but since the aluminum alloy fracture limit strain (strain) is small, it is difficult to obtain an ideal formed body even if the above-mentioned hydroforming equipment is used.

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