Forming method of large-size thin-wall complex curve section annular part

Abstract

The invention provides a forming method of a large-size thin-wall complex curve section annular part. The method comprises the following steps of dividing an annular part model into N arc-shaped part models in a circumferential direction according to a model size of the annular part; designing a hot forming process part and designing a hot forming die; determining a size of a needed blank, conducting blanking, conducting circle preforming on the blank obtained through blanking, and preparing a circle preformed part; conducting hot forming on the circle preformed part through the hot forming die to obtain the hot forming process part; removing a process allowance of the hot forming process part to prepare an arc-shaped part; conducting surface treatment on the N arc-shaped parts; assembling and welding the N arc-shaped parts subjected to surface treatment to obtain the annular part; and correcting the shape of the welded annular part. According to the method, a metal plate preforming plus hot forming plus welding composite forming technology is adopted, the most suitable forming technology is adopted for different portions, and therefore precise forming of parts is integrally achieved, the subsequent machining amount can be effectively reduced, subsequent manual shape correction is avoided, the efficiency is improved, and the cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of precision sheet metal processing, and in particular relates to a forming method of a large-size thin-walled complex curve section ring piece. Background technique [0002] Large-scale ring structures are widely used in aerospace, weaponry and other fields. In the field of aerospace, the shape complexity and light weight of annular structural parts are getting higher and higher, and the requirements for manufacturing precision are getting higher and higher. The commonly used manufacturing methods of thin-walled rings are mainly spinning forming and ring welding compound manufacturing. However, spinning forming requires high equipment and low forming efficiency. The composite manufacturing method of circular welding is limited by the structural characteristics of the parts, and is only suitable for simple circular components. [0003] Therefore, it is necessary to design a reasonable and efficient formin...

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the deficiencies in the prior art, the inventors have carried out dedicated research and provided a method for forming a large-scale thin-walled complex curved cross-section ring, which can overcome the prior art's high requirements for equipment, difficulty in controlling the shape accuracy, or cost Higher disadvantages effectively ensure the precise forming of large-scale thin-walled complex curve section rings, thereby completing the present invention

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