QUICK TESTING AND MODELING OF THERMALLY-INDUCED ERRORS OF CNC MACHINE-TOOLS

被引：65

作者：

CHEN, JS

CHIOU, G

机构：

[1] Department of Mechanical Engineering, National Chung Cheng University, San-Hsing, Ming-Hsiung

来源：

INTERNATIONAL JOURNAL OF MACHINE TOOLS & MANUFACTURE | 1995年 / 35卷 / 07期

关键词：

Computer control - Computer software - Correlation methods - Degrees of freedom (mechanics) - Error compensation - Lead screws - Mathematical models - Neural networks - Numerical control systems - Personal computers - Real time systems - Thermal effects;

D O I：

10.1016/0890-6955(94)00101-O

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

This research is concerned with enhancing the accuracy of a machining center through compensating for the thermally induced errors of the spindle and leadscrews using software. A quick set-up and multiple degree of freedom measurement system consisting of an on-machine probe and artifacts has been developed to accelerate and simplify the thermal error measurement. An artificial neural network based technique which correlates the thermal error field to the machine temperature field is then developed to model the measured multiple thermal errors all together. Test results show that the ANN can not only fit the highly nonlinear thermal errors well, but has also predicted thermal errors well even under varying or new cutting conditions with a precision of more than 85%. A PC based error compensation scheme has also been developed to upgrade a FANUC CNC controller for real-time thermal error compensation. Test results on a vertical machining center show that a 70-90% reduction of thermal errors has been gained after compensation.

引用

页码：1063 / 1074

页数：12

共 11 条

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