A shape correction device for titanium alloy hemispherical shell and shape correction method thereof

Abstract

The invention relates to a shape-correcting device for a titanium alloy hemispherical shell, which includes a core tooling, an exterior restraint tooling and a locking assembly. The tooling base of the core tooling is equipped with a On the stepped surface of the internal profile of the shell, a plurality of first through holes are arranged on the stepped surface along its circumference. Tight tooling shape constraint surface, a plurality of second through holes are arranged on the tooling along its circumference, both ends of the tooling are provided with locking through holes, and the locking component includes connecting the first through hole and the second through hole The first locking bolt, and the second locking bolt connecting the locking through holes in the two adjacent tooling parts, press the internal profile into the core tooling and the shape constraint tooling through the locking component, The shape-constrained tooling always produces a radial force on the internal shape during the heat deformation process, so as to achieve the purpose of shape correction.

Description

technical field [0001] The invention relates to the technical field of titanium alloy hemispherical processing, in particular to a shape correction device and a shape correction method for a titanium alloy hemispherical shell. Background technique [0002] Based on the superplasticity of titanium alloy materials, the plate and mold are usually heated to a specific high temperature state at home and abroad, and the titanium alloy hemispherical shell is prepared by superplastic forming technology. The method for preparing the hemispherical shell has many advantages, but there is still the problem of deformation of the profile of the part, especially the profile of the equator region. The reasons for the deformation of the parts lie in the following aspects: First, the factors of the preparation process, the parts must be taken out at high temperature after superplastic forming, otherwise the parts will be stuck in the mold due to cooling shrinkage after forming and cannot be t...

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Problems solved by technology

[0004] In the existing technology, by increasing the initial thickness of the plate and repairing the mold surface, the method of meeting the subsequent processing requirements of the hemispherical shell is met. The subsequent processing allowance of the part is large, and the repeated monitoring and repair of the mold surface cannot guarantee the continuous preparation of the part. High cost and low production efficiency

In addition, during the continuous preparation process of the hemispherical shell, due to the continuous deterioration of the precision of the mold surface, there are differences in the deformation of the parts after forming. Subsequent processing needs to be repeatedly trimmed according to the deformation of the parts, which further increases the processing difficulty and reduces the follow-up. Processing efficiency

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