A processing method of a semi-circular reference of a thin-walled sector structure part and a bushing

By using thermal calibration control and specialized fixture design, combined with reasonable cutting parameters and paths, the deformation and accuracy problems of the thin-walled semi-circular reference plane of the front sealing bushing of the aero-engine spindle during the machining process were solved, achieving efficient and high-precision machining results.

CN120940677BActive Publication Date: 2026-06-26AECC AVIATION POWER CO LTD
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Patent Information

Application Number
CN202511414578.6
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2025-09-29
Publication Date
2026-06-26
Estimated Expiration
2045-09-29

AI Technical Summary

Technical Problem

In the existing technology, the thin-walled semi-circular reference plane of the front sealing bushing of the aero-engine main shaft has the potential for deformation during the machining process. The clamping points and supports are not reasonable, and the effects of material springback and intermittent cutting cannot be effectively offset, resulting in low machining efficiency and difficulty in guaranteeing accuracy.

Method used

A thermal calibration process is adopted, and a special thermal calibration fixture and a finishing fixture are designed. The internal stress is released through thermal calibration, and the clamping rigidity is enhanced. Then, reasonable cutting parameters and combined tool paths are used for finishing to ensure the positioning and rigidity of the parts.

Benefits of technology

Effectively control part deformation, improve processing efficiency and precision, meet the manufacturing requirements of aero-engines for high-performance parts, and ensure high-quality forming of thin-walled semi-circular reference planes.

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Abstract

The application discloses a kind of thin-walled sector structure part semicircle reference processing method, bushing, method includes: based on the structure of part Formulation include heat control process route of shape control;Semi-finishing is carried out to part;After semi-finishing, the part is clamped using heat shape control special fixture, heat shape control processing is carried out, and preliminary control heat shape control after part is obtained;Finish machining fixture is installed on lathe and is aligned;After heat shape control, the part to be machined is clamped on the aligned finish machining fixture, and the part to be finished is fixed by aligning inner hole and applying floating support;Install machine clamp tool and select finish machining blade, set parameter;Semi-circular reference plane of part is carried out finish machining cutting, and the combined tool path of inside-out and outside-in is used to tool path, and processing is completed.The application effectively controls the deformation amount before part finish machining, enhances the clamping rigidity of semicircular weak place, makes machining semicircular reference plane positioning reliable, and improves the quality and efficiency of processing.
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