Method for checking the measurement accuracy of a blade surface coordinate measuring machine

CN122921079APending Publication Date: 2026-10-16AECC COMML AIRCRAFT ENGINE CO LTD
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Patent Information

Application Number
CN202510407709.1
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-04-01
Publication Date
2026-10-16

AI Technical Summary

Technical Problem

[0004]对于具有复杂自由曲面和较大曲率特征的零件(如叶片)，标准几何体校验结果无法完全反映三坐标测量机的真实测量能力

Benefits of technology

[0030] The method for verifying the accuracy of three-coordinate measurement of blade surfaces includes: mapping the minimum radius of curvature and chord length of the aero-engine blade section line to elliptical parameters, and generating a conical mold based on the elliptical parameters; using a three-coordinate measuring machine to measure the conical mold along the elliptical path corresponding to the elliptical parameters to obtain the elliptical section line profile; using a standard conical calibration traceability method to measure the roundness of the conical mold to obtain the conical surface profile; and comparing the elliptical section line profile and the conical surface profile to obtain the accuracy of the three-coordinate measurement of the blade surface.

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Abstract

Embodiments of the application provide a kind of vane curved surface three coordinate measurement precision verification method, it is related to aero-engine vane precision detection technical field.The purpose is to improve the problem that three coordinate measurement precision verification method based on standard geometry is difficult to reflect vane curved surface three coordinate measurement precision.It includes the minimum curvature radius and chord length of aero-engine vane section line are mapped into elliptic parameter, and conical module is generated based on elliptic parameter;Conical module is measured along the elliptic path corresponding to elliptic parameter using three coordinate measuring machine, and elliptic section line profile is obtained;Conical module is measured using the mode of standard conical calibration traceability, and conical surface profile is obtained;Elliptic section line profile and conical surface profile are compared.The geometric parameters of aero-engine vane section line are used to simulate and construct standard conical module, the standard conical module can be measured with high precision, then compared with three coordinate measurement, and measurement error is obtained.
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