A Spinning Forming Method of Thin-wall Curved Generator Parts

Abstract

The invention relates to a spinning forming method of a thin-walled curved-generatrix-shaped part. According to the forming method, a thick-walled barrel-shaped piece serves as a blank, after return spinning and segmented forming, the part is pushed to move forward by utilizing synchronous feeding of two rotating wheels to be separated from a spinning die to realize unloading, one-time spinning forming of the thin-walled curved-generatrix-shaped part is achieved, the number of dies is decreased, the number of spinning forming times is decreased, and the labor intensity of workers is reduced, so that the purposes of reducing the machining cost, shortening the production cycle, improving the production efficiency and improving the part forming precision are achieved, and meanwhile, the technical difficult problem that the thin-walled curved-generatrix-shaped part is difficult to unload is also solved.

Description

technical field [0001] The invention relates to a metal plastic forming method, in particular to a forming method of a thin-wall curved generatrix-shaped part, and belongs to the technical field of metal plastic forming. Background technique [0002] Thin-wall curved generatrix-shaped parts are cones with constantly changing semi-cone angles. They are widely used in industrial production, especially in aerospace and other fields, such as aircraft auxiliary fuel tanks, engine covers, missile guidance cabins, and large launch vehicle engine nozzles. With the development of the aerospace field, the demand for equipment such as large-scale launch vehicles, long-range missiles, and large-capacity auxiliary fuel tanks has become increasingly urgent, and the research on the processing methods of thin-wall curved generatrix-shaped parts has become more and more intensive. [0003] The forming process of thin-walled curved generatrix-shaped parts is generally a soft mold (half mold) ...

AI Technical Summary

Problems solved by technology

[0008] (4) Multi-pass spinning forming, annealing treatment is required between each pass, and the processing cycle is longer;

[0009] (5) The workpiece has been loaded and unloaded many times, and the installation and positioning errors are large, which affects the dimensional accuracy of the workpiece;

[0010] (6) The number of molds is large and the cost is high;

[0011] (7) The variation range of the half-cone angle of curved generatrix-shaped parts and the limit half-cone angle corresponding to the limit thinning rate of the part material are the two main basis for the design of the spinning forming process of the part. The variation range of the part half-cone angle or the material limit half-cone The larger the angle, the more powerful spinning times are required in the spinning forming process, and the more complicated the process is

Images