Toroidal flow shaping method of antisymmetric reducing thin wall part

Abstract

The invention discloses an annular flow forming method for asymmetrical variable diameter thin-walled parts, and relates to a forming method for the asymmetrical variable diameter thin-walled parts. Based on solving the problems of complex process, low size precision, high cost and the like when the asymmetrical variable diameter thin-walled parts adopt the prior split forming and combined welding method, the method comprises: carrying out structural design on a core die, and manufacturing an unsealed cylinder blank; placing the unsealed cylinder blank between the core die and a split outer die of a forming die, and aligning one unsealed side opposite to one reverse side of a die cavity of the split outer die; and pushing a plunger piston to inject a viscoelastic soft die into a cavity ofthe core die, and deforming the unsealed cylinder blank by the action of loading injection holes until the side wall of the unsealed cylinder blank is attached to the inner wall of the die cavity of the split outer die. The method forms the asymmetrical variable diameter thin-walled parts having the advantages of good surface quality, high size precision, even distribution of thickness, simple process, low manufacturing cost and the like, can form the asymmetrical variable diameter thin-walled parts with complex shapes, and is suitable for the fields of automobiles, aviation, astronavigation,and the like.

Description

technical field

[0001] The invention relates to a method for forming an asymmetric variable-diameter thin-walled part, which belongs to the technical field of plate forming. Background technique

[0002] Asymmetric variable-diameter thin-walled parts are a typical type of shell structural parts in the fields of automobiles, aviation and aerospace. The strength of the material is higher or lower. For the forming and manufacturing of such parts, the manufacturing methods of split forming and combined welding are generally used at present. Split forming mostly uses stamping, spinning (even hot spinning), polyurethane rubber and other means. Due to the structural characteristics, the number of separate parts is large, the process is numerous, the cost is high, the dimensional accuracy is affected by each separate forming process, and the quality control is difficult. Due to the thin wall thickness and irregular shape of each split forming part; the combined welding process th...

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