High precision spinning forming method for thin wall closing head with radius-thickness ratio less than three per mille

Abstract

The invention relates to a thin-walled closure head high accuracy spinning forming method. The invention is to resolve the problem of big size closure head, thin wall thickness, high accuracy size and high difficulty of forming. Spinning machine is started to make rolling wheel do axial and circumferential movement along track loaded into program in head while spinning, meanwhile main axle of spinning machine drives core and bar plate to spin. When rolling wheel rolls to the distance of 20mm from edge it quits. The invention has the advantages of simple process and high accurate product.

Description

technical field [0001] The invention relates to a spinning forming process of a head. Background technique [0002] The head is a key pressure-bearing part of various pressure vessels and storage tanks. Among them, thin-walled heads with a thickness-to-diameter ratio of less than 3‰ are mainly used in the lining of pressure vessels and storage tanks on spacecraft and large-scale pressure vessels. The forming process has an important influence on the pressure vessel manufacturing technology. Traditional pressure vessel heads are mostly produced by stamping method, which requires a large-tonnage, large-table hydraulic press and a complete set of large molds, which is not suitable for the single-piece, small-batch and multi-variety production characteristics of aerospace pressure vessel heads. Therefore, since the 1960s, foreign countries have mostly used the spinning method to produce various heads. Because the size of the head on the spacecraft is relatively large compared ...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the size of the head on the spacecraft is large, the wall thickness is thin, the dimensional accuracy is high, and the forming is difficult, especially the thin-walled head with a thickness-to-diameter ratio of less than 3‰ is more difficult to spin. To solve the problem, a high-precision spinning forming method for thin-walled heads with a thickness-to-diameter ratio of less than 3‰ is provided. The invention only needs one piece of equipment, and the spinning can be completed by installing the slab at one time. It has high forming precision and mold Low cost and short production cycle

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