Liquid expansion forming device and liquid expansion forming process

Abstract

The invention discloses a novel liquid-expansion molding device and a liquid-expansion molding process. The novel liquid-expansion molding device comprises an autofrettage pressure mould and a floating pressure mould. The autofrettage pressure mould is provided with a molding cavity; a through hole matched with the molding cavity is formed in the middle of the floating pressure mould which is mounted in a liquid-expansion pressure cavity; the edges of a plate to be molded are pressed by the adjoining plane of the floating pressure mould and the autofrettage pressure mould which is connected with a press machine; the liquid-expansion pressure cavity is connected with high-pressure liquid; in the molding process, the press machine is used for pressing and sealing the edges of the plate to be molded, and the high-pressure liquid is input into the liquid-expansion pressure cavity and acts on the plate to be molded, so that the plate to be molded deforms toward the molding cavity of the autofrettage pressure mould and is molded. The structures of the liquid-expansion molding moulds can achieve liquid-expansion molding of the plate, and the structure of the novel liquid-expansion molding device can also be conveniently used for liquid-expansion molding of the plate. The process is simple, requirements for the moulds are low, and the precision of molding can also be improved. Further, the structure can reduce the work load of the press machine, the work pressure of the press machine is reduced at the same time, and use requirements are lowered.

Description

technical field [0001] The invention relates to a liquid expansion forming device and a liquid expansion forming process. Background technique [0002] The liquid expansion molding process has the advantages of fast forming speed and convenient molding of special-shaped parts. The existing liquid expansion molding process is generally suitable for cylindrical or tubular molding workpieces. The end is sealed and injected with high-pressure liquid, and the pipe body or column is bulged under the action of high-pressure liquid and finally shaped by the molding mold. As for the plate, the existing process generally adopts stamping forming, and the forming mold is clamped by the press to form the plate. The forming accuracy is limited by the precision of the mold and the pressure of the press, and the force of the forming mold is relatively large. Therefore, the requirements for forming molds are very high. At present, there is no liquid expansion forming process that can reali...

AI Technical Summary

Problems solved by technology

As for the plate, the existing process generally adopts stamping forming, and the forming mold is clamped by the press to form the plate. The forming accuracy is limited by the precision of the mold and the pressure of the press, and the force of the forming mold is relatively large. Therefore, the requirements for forming molds are very high

At present, there is no liquid expansion forming process that can realize sheet forming

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