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The design and development of a real-time compensation controller of thermally-induced errors for CNC machine tools

The design and development of a real-time compensation controller of thermally-induced errors for... Thermal deformation of the machine tool structure is one of critical factors affecting the machining accuracy level. These thermally-induced errors can account for as much as 70% of the dimensional errors on a machined work piece. Although thermally-induced errors can be reduced by applying the new materials with low-expansion coefficient to machine tools, designing the well symmetrical structure of machine tools, as well as controlling the temperature of the machining process, the costs will rise greatly. Furthermore, thermally-induced errors cannot be eliminated completely at the design stage. Hence if thermally-induced errors can be predicted, the use of indirect compensation systems will emerge as the most economical and inevitable course of action. In this paper, a real-time compensation controller of thermally-induced errors for CNC machine tools is designed and developed with the embedded technology. Test results demonstrate this compensation controller predict and compensate thermally-induced errors of CNC machine tools very well. Keywords: thermally-induced errors; CNC machine tools; error compensation; embedded system. Reference to this paper should be made as follows: Hu, J., Zhou, Z., Liu, Q., Lou, P. and Zhang, H. (2017) ` of thermally-induced errors for CNC machine tools', Int. J. Manufacturing Research, Vol. 12, No. 1, pp.118­130. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png International Journal of Manufacturing Research Inderscience Publishers

The design and development of a real-time compensation controller of thermally-induced errors for CNC machine tools

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Publisher
Inderscience Publishers
Copyright
Copyright © 2017 Inderscience Enterprises Ltd.
ISSN
1750-0591
eISSN
1750-0605
DOI
10.1504/IJMR.2017.083655
Publisher site
See Article on Publisher Site

Abstract

Thermal deformation of the machine tool structure is one of critical factors affecting the machining accuracy level. These thermally-induced errors can account for as much as 70% of the dimensional errors on a machined work piece. Although thermally-induced errors can be reduced by applying the new materials with low-expansion coefficient to machine tools, designing the well symmetrical structure of machine tools, as well as controlling the temperature of the machining process, the costs will rise greatly. Furthermore, thermally-induced errors cannot be eliminated completely at the design stage. Hence if thermally-induced errors can be predicted, the use of indirect compensation systems will emerge as the most economical and inevitable course of action. In this paper, a real-time compensation controller of thermally-induced errors for CNC machine tools is designed and developed with the embedded technology. Test results demonstrate this compensation controller predict and compensate thermally-induced errors of CNC machine tools very well. Keywords: thermally-induced errors; CNC machine tools; error compensation; embedded system. Reference to this paper should be made as follows: Hu, J., Zhou, Z., Liu, Q., Lou, P. and Zhang, H. (2017) ` of thermally-induced errors for CNC machine tools', Int. J. Manufacturing Research, Vol. 12, No. 1, pp.118­130.

Journal

International Journal of Manufacturing Research – Inderscience Publishers

Published: Jan 1, 2017

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