A method for forming large-scale thin-walled ring parts with complex curved sections

Abstract

The invention provides a method for forming a large-scale thin-walled ring with a complex curve section, which includes: dividing the ring model into N arc-shaped models along the circumference according to the model size of the ring; designing the thermoforming process part, and Design a thermoforming mold; determine the size of the required blank and blank it, and preform the blank circle obtained by blanking to prepare a circle preform; use a thermoforming mold to perform thermoforming on the circle preform to obtain a hot Forming process parts; remove the process margin of thermoforming process parts, and prepare arc-shaped parts; surface treat N arc-shaped parts; assemble N surface-treated arc-shaped parts, and weld them to obtain ring parts; weld The final ring is shaped. The present invention adopts sheet metal preforming + thermoforming + welding composite forming technology, and adopts the most suitable forming technology for different parts, so as to realize the precision forming of parts as a whole, which can effectively reduce the amount of subsequent processing, avoid subsequent manual shape correction, improve efficiency and reduce costs .

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...

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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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