Forming method and forming die for thin-walled spherical parts

Abstract

The invention relates to a forming method of a thin-wall spherical part. The forming method comprises a pre-forming stage and a finishing forming stage. In the pre-forming stage, a pre-forming mold isadopted for stretching and forming a sphere bottom cylindrical part. In the finishing forming stage, the pre-formed and stretched sphere bottom cylindrical part is expanded to form the spherical partthrough a finishing forming mold.

Description

technical field [0001] The invention relates to a plastic forming method of a thin-walled part, in particular to a forming method and a forming die of a spherical part. Background technique [0002] With the requirements of light weight and integration in aviation, aerospace, automobile and other fields, large-size, difficult-to-deform and thin-walled parts are widely used, and at the same time, it brings severe challenges to plastic forming manufacturing technology. As a flexible forming technology, liquid-filled forming has the characteristics of high forming precision, good surface quality, short production cycle and suitable for forming thin-walled parts with complex structures, and its application range tends to be wide. Liquid-filled forming can be divided into plate liquid-filled forming and internal high-pressure bulge forming according to the type of material, and plate liquid-filled forming can be divided into active liquid-filled forming and passive liquid-filled ...

AI Technical Summary

Problems solved by technology

After the hemispherical parts are formed, due to factors such as springback and trimming, it is difficult to fit the hemispherical parts into spherical parts with the required size, and repeated adjustments are required to ensure welding accuracy and reduce production efficiency.

At the same time, due to the thermal effect during the welding process, the parts after welding are seriously deformed, resulting in defects such as difficult repairs, poor surface quality, and low dimensional accuracy of the parts.

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