A control structure for laser additive manufacturing of a titanium alloy thin-walled cavity part and a design method and application thereof

By constructing multiple discontinuous small thin blocks inside thin-walled titanium alloy parts and performing model rotation and support role transformation, the problem of part deformation control in laser powder bed melting manufacturing was solved, improving the manufacturing quality and production efficiency of the parts.

CN122352931APending Publication Date: 2026-07-10CHINA WEAPON SCI ACADEMY NINGBO BRANCH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA WEAPON SCI ACADEMY NINGBO BRANCH
Filing Date
2026-04-03
Publication Date
2026-07-10

AI Technical Summary

Technical Problem

In the process of manufacturing thin-walled titanium alloy parts with internal cavities using laser powder bed melting, residual stress is generated inside the parts, leading to deformation. Traditional external support designs are complex, difficult to remove, and have limited effectiveness, affecting the quality and performance of the parts.

Method used

A shape-controlling structure based on laser additive manufacturing is designed. By constructing multiple discontinuous small thin blocks inside the part and performing model rotation and support role transformation, a self-supporting structure is formed. This structure can effectively control deformation during printing and facilitate support removal.

Benefits of technology

It achieves effective control over part deformation, simplifies the printing process, reduces the amount of support material used, improves the manufacturing quality and production efficiency of parts, and ensures the precision and integrity of parts.

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Abstract

This invention discloses a shape control structure for thin-walled cavity parts made of titanium alloy based on laser additive manufacturing, its design method, and its application. The design scheme includes the following steps: modeling the shape control structure of the cavity part in 3D modeling software for additive manufacturing; then constructing a solid volume block with an inner wall adapted to the shape control structure within the cavity part shape control structure; further dividing the solid volume block into multiple discontinuous thin blocks of the same thickness and spacing; and importing the thin blocks and the cavity part shape control structure into 3D printing software. The structure constructed through this design method can more easily realize the generation of multi-scenario supports, break through the constraints of support structures, and can also exist as a shape control structure in the manufactured parts. Furthermore, while meeting the requirements for controlling the deformation of the parts, it also makes the supports easy to remove, effectively improving the manufacturing quality and production efficiency of the parts.
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