Method and system for compensating machining error of precision part based on in-machine measurement

By acquiring repeated measurement data through a machine measuring device, eliminating measurement fluctuation points, performing rigid body alignment of assembly reference surfaces and identification of consistent deviations with the cutting tool, and using the LightGBM model to calculate local compensation amounts, the problem of mixed sources of measurement deviations and unclear compensation objects in existing technologies is solved, thus realizing accurate compensation and continuous correction of machining errors in precision parts.

CN122411267APending Publication Date: 2026-07-17SHENZHEN CY-PRECISION CO LTD
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Patent Information

Application Number
CN202610854531.X
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-06-13
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

In existing methods for compensating for machining errors of precision parts based on in-machine measurement, the sources of comprehensive measurement deviations are mixed, and the compensation objects and scope of influence are unclear, resulting in inaccurate calculation of compensation amounts and easy confusion between coordinate offset compensation, tool compensation, and local trajectory compensation.

Method used

By acquiring repeated measurement data of theoretical measurement points through the machine measurement device, eliminating measurement fluctuation points, aligning the assembly reference surface rigidly, identifying the consistent deviation with the tool, generating coordinate offset compensation and local compensation, calculating the local trajectory compensation using the LightGBM model, generating compensation control commands, and performing re-measurement closed-loop control.

Benefits of technology

It improves the stability of measurement data, clarifies the compensation objects and the scope of influence, reduces the risk of repeated compensation, and realizes the ability to continuously correct the machining errors of precision parts.

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Abstract

本发明公开了一种基于在机测量的精密零件加工误差补偿控制方法及系统，属于工业控制系统技术领域，包括以下步骤：获取理论测量点和加工状态数据，形成有效测量偏差点并生成坐标偏置补偿量；扣除坐标偏置影响后生成剩余偏差点；按刀具号和法向方向类别生成刀具补偿量集合，并确定局部剩余偏差点；将局部剩余偏差点按加工段输入已训练LightGBM补偿量计算模型，得到局部补偿量；生成补偿控制指令集，执行后复测并闭合补偿结果。本发明通过对在机测量偏差进行测量波动筛除、坐标偏差剥离、刀具一致偏差识别和局部补偿分配，达到了明确补偿作用对象并降低重复补偿风险的技术效果，解决了现有技术中综合测量偏差来源混合、补偿对象和影响范围不明确的问题。
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Citation Information

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