Engine rotor blade combined machining repair alternative tooling and machining method

By replacing tooling with combined machining of engine rotor blades, precise positioning and clamping of blades is achieved, solving the problems of inconsistent machining allowances and cumbersome clamping and positioning when the number of blades is small. This improves repair quality and efficiency and saves costs.

CN120886079BActive Publication Date: 2026-07-14CHENGDU ENGINE GROUP
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CHENGDU ENGINE GROUP
Filing Date
2025-05-19
Publication Date
2026-07-14

AI Technical Summary

Technical Problem

Existing technologies, when dealing with a small number of blades, suffer from inconsistent blade machining allowances, cumbersome clamping and positioning, low efficiency, and high equipment and labor costs, making it difficult to meet the needs of rapid support.

Method used

The tooling is replaced by engine rotor blade assembly machining. The blades are precisely positioned and clamped through tenon positioning seats and blade tip positioning mechanisms, simulating the assembly state of the blades in the rotor. Manual fitting is used to replace machine tool machining, and the blade tip dimensions of the new and old blades are correlated.

Benefits of technology

It improves the quality and efficiency of blade repair, saves costs, and is suitable for blade tip size processing when the number of blades is small, avoiding the need to clamp the rotor and process the blades on the machine tool.

✦ Generated by Eureka AI based on patent content.

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    Figure CN120886079B_ABST
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Abstract

The present application relates to the technical field of aero-engine, and discloses a combined machining replacement tool for engine rotor blade in maintenance, which realizes the clamping of the tenon of the old blade through the jacking mechanism and the tenon groove, clamps the blade tip of the old blade through the back positioning block and the basin positioning block, makes the standard curved surface of the back positioning block and the standard curved surface of the basin positioning block flush with the blade tip of the old blade, realizes the accurate positioning and clamping of the blade, restores the assembly state of the blade in the rotor, transfers the size of the blade tip of the old blade to the replacement tool, and then clamps the new blade to the tool, so that the size correlation of the blade tip of the new blade and the old blade is realized, and the part of the new blade tip which is higher than the standard curved surface is the part which needs to be removed. The present application also discloses a combined machining replacement machining method for engine rotor blade in maintenance, which realizes the accurate positioning and clamping of the blade through the replacement tool, and realizes the machining of the replacement machine tool through manual repair, so that the repair quality and efficiency are improved.
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