Shape correcting device for titanium alloy hemispherical shell and shape correcting method of shape correcting device

Abstract

The invention relates to a shape correcting device for a titanium alloy hemispherical shell. The shape correcting device comprises a mold core tool, an external shape restraining tool and a locking assembly; a tool base of the mold core tool is provided with a step surface capable of being embedded into the internal molded surface of the titanium alloy hemispherical shell to be corrected, and a plurality of first through holes are formed in the step surface along the circumferential direction of the step surface; the external shape restraining tool comprises a plurality of arc-shaped tool parts, each tool part comprises a tool external shape restraining face matched with the step face to press the internal molded surface, a plurality of second through holes are formed in each tool part inthe circumferential direction of the tool part, locking through holes are formed in the two ends of each tool part, and the locking assembly comprises first locking bolts and second locking bolts, wherein the first locking bolts are connected with the first through holes and the second through holes, and the second locking bolts are used for connecting the locking through holes in every two adjacent tool parts; and the internal molded surface is pressed in the mold core tool and the external shape restraining tool through the locking assembly, the external shape restraining tool always generates radial acting force on the internal molded surface in the thermal deformation process, and therefore the purpose of shape correction is achieved.

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...

AI Technical Summary

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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