• CN：11-2187/TH
  • ISSN：0577-6686
机械工程学报

›› 2013, Vol. 49 ›› Issue (19): 133-143.

• 论文 • 上一篇    下一篇

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复杂曲面零件加工精度的原位检测误差补偿方法

高健;陈岳坪;邓海祥;杨泽鹏;陈新   

  1. 广东工业大学机械装备制造与控制技术教育部重点实验室;广西科技大学广西汽车零部件与整车技术重点实验室;广东工业大学实验教学部
  • 发布日期:2013-10-05

In-situ Inspection Error Compensation for Machining Accuracy Improvement of Complex Components

GAO Jian; CHEN Yueping; DENG Haixiang; YANG Zepeng;CHEN Xin   

  1. Key Laboratory of Mechanical Equipment Manufacturing & Control Technology of Ministry of Education, Guangdong University of Technology Guangxi Key Laboratory of Automobile Components and Vehicle Technology, Guangxi University of Science and Technology Department of Experiment Teaching, Guangdong University of Technology
  • Published:2013-10-05

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摘要： 为提高复杂曲面零件的数控机床原位检测精度，分析影响接触式检测系统精度的各项因素及其误差补偿方法。对检测系统的主要误差来源如机床几何误差、测头预行程误差和测头半径误差进行分析研究。在对数控机床的几何误差进行分析和建模的基础上，采用激光干涉仪进行三轴数控机床的单项误差测量和补偿；针对测头检测过程中存在的预行程误差，提出基于径向基函数(Radial basis function, RBF)的预行程误差预测方法，获得测头预行程误差分布图，并对检测系统进行实时预行程误差的补偿；提出改进的三角网格模型顶点法矢计算方法，有效进行三维测头的半径补偿。通过实例零件的加工精度原位检测试验及其与三坐标测量机CMM检验结果的比较，验证了原位检测方法的有效性。

关键词: 复杂曲面, 加工精度, 数控机床, 误差补偿, 原位检测

Abstract: In order to improve in-situ inspection accuracy of complex surface components, error factors influencing the inspection accuracy of the on-machine inspection system are discussed and error compensation methods are studied. The main errors of the inspection system are analyzed which contain geometric error of machine tools, pre-travel error of the inspection system and radius error of measuring probe. The geometric error model of a three-axis numerical control machine tool is established and each individual error value is identified and obtained through laser interferometer. For the pre-travel error of the inspection system, a radial basis function algorithm based prediction method is proposed and implemented. Based on the distribution of the pre-travel probe error obtained, an real-time compensation of the error can be performed during the actual inspection process. Considering the probe radius and its compensation of the contact-type measuring system4, a new algorithm is developed to improve the calculation accuracy of the normal vector which will affect the compensation accuracy. To verify the effectiveness of the proposed method, a complex part is exampled. Through the comparison of the in-situ inspection result with that of the CMM measurement, the proposed inspection system can achieve a great improvement of the inspection accuracy.

Key words: Complex component, Error compensation, In-situ inspection, Machining accuracy, Numerical control machine tools

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