A Composite Process Method of Electromagnetic Progressive Preforming and Spinning Fine Shaping

Abstract

The invention belongs to the field of metal material plastic processing and discloses an electromagnetic incremental preforming and spinning precision forming composite method. The method comprises the following steps of (a) designing structure parameters of a preformed part, wherein the structure parameters include the material, shape, size and wall thickness of the preformed part; (b) designingthe coil shape, layer number, size, coiled turn number and the cross sectional area of a forming coil used for electromagnetic incremental preforming and the moving track and the discharge frequency of the forming coil; (c) conducting electromagnetic incremental preforming on a raw material to obtain the preformed part; and (d) conducting spinning on the preformed part through a spinning roller tomake the preformed part be attached to a mold completely to form the required shape and then achieving precision forming of the preformed part. Through the method, the obtained molded product is excellent in quality; the production efficiency is improved; the production cost is saved; the requirements for large-scale mechanized and high-efficiency production are met.

Description

technical field [0001] The invention belongs to the field of plastic processing of metal materials, and more specifically relates to a composite process method of electromagnetic progressive preforming and spinning fine shaping. Background technique [0002] Large-scale shell parts are widely used in aerospace, energy and chemical industries, etc. Typical representatives are rocket fuel storage tanks and heavy-duty container heads. In order to meet the development needs of lightweight, light metals such as aluminum alloys are often used as large Forming material. At present, large aluminum alloy shell parts are mainly formed by multi-pass hot spinning. Although the workpiece after spinning has good dimensional accuracy and surface quality, the process has small deformation in a single pass and low forming efficiency. ; Annealing heat treatment is required between each pass, and the process operation is complicated; under quasi-static conditions, the forming limit of the mat...

AI Technical Summary

Problems solved by technology

[0006] In view of the above defects or improvement needs of the prior art, the present invention provides a composite process method of electromagnetic progressive preforming and spinning fine shaping. By combining the two processes of electromagnetic progressive preforming and spinning fine shaping, the two processes The advantages and disadvantages of each other complement each other, thereby solving the technical problems of low material forming limit, high production cost and difficult control of dimensional accuracy in electromagnetic progressive forming technology

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