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IJAT Vol.6 No.2 pp. 196-204
doi: 10.20965/ijat.2012.p0196
(2012)

Paper:

Observation of Thermal Influence on Error Motions of Rotary Axes on a Five-Axis Machine Tool by Static R-Test

Cefu Hong and Soichi Ibaraki

Department of Micro Engineering, Graduate School of Engineering, Kyoto University, Yoshida-honmachi, Sakyo-ku, Kyoto 606-8501, Japan

Received:
August 25, 2011
Accepted:
November 22, 2011
Published:
March 5, 2012
Keywords:
error motion of rotary axes, thermal test, R-test, five-axis machine tool, geometric error
Abstract

Thermal distortions are regarded as one of the major error factors in machine tools. ISO 230-3 and ISO 10791-10 describe tests to evaluate the influence of thermal distortions caused by linear motion and spindle rotation on the Tool Center Position (TCP). However, for five-axis machine tools, no thermal test is described for a rotary axis. Therefore, in this paper, a method for observing thermally induced geometric errors of a rotary axis with a static R-test is proposed. Unlike conventional thermal tests in ISO 230-3 and ISO 10791-10, where the thermal influence on the positioning error at a single point is tested, the present test measures the thermal influence on the error motions of a rotary axis. The R-test measurement clarifies how the error motions of a rotary table change with the rotation of a swiveling axis and how they are influenced by thermal changes. The thermal influence on the error motions of a rotary axis is quantitatively parameterized by geometric errors that vary with time.

Cite this article as:
C. Hong and S. Ibaraki, “Observation of Thermal Influence on Error Motions of Rotary Axes on a Five-Axis Machine Tool by Static R-Test,” Int. J. Automation Technol., Vol.6, No.2, pp. 196-204, 2012.
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Last updated on Nov. 08, 2019