Thermal Test for Error Maps of Rotary Axes by R-Test


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Thermal distortions are regarded as one of major error factors in a machine tool. ISO 230-3 [1] describes tests to evaluate the influence of thermal distortions caused by linear motion and spindle rotation on the tool center position (TCP). No test is described in these standards on the thermal influence of a rotary axis. Furthermore, conventional thermal tests only measure thermal influence on the positioning error at a single point, not error motions of an axis. This paper proposes a method to calibrate thermal influence on error motions of rotary axes in five-axis kinematics by the static R-test. The R-test measurement clarifies how error motions of a rotary table changes with the rotation of a swiveling axis, and how error motions are influenced by thermal changes. Experimental demonstration will be presented.



Key Engineering Materials (Volumes 523-524)

Edited by:

Tojiro Aoyama, Hideki Aoyama, Atsushi Matsubara, Hayato Yoshioka and Libo Zhou






S. Ibaraki and C. F. Hong, "Thermal Test for Error Maps of Rotary Axes by R-Test", Key Engineering Materials, Vols. 523-524, pp. 809-814, 2012

Online since:

November 2012




[1] S. Ibaraki and W. Knapp, Indirect Measurement of Volumetric Accuracy for Three-axis and Five-axis Machine Tools: A Review, to appear in Int'l J. of Automation Technology, 6, 2 (2012).

DOI: 10.20965/ijat.2012.p0110

[2] H. Schwenke, W. Knapp, et al., Geometric Error Measurement and Compensation of Machines -An Update, Annals of the CIRP, 57, 2 (2008), 560-575.

DOI: 10.1016/j.cirp.2008.09.008

[3] ISO 230-3: 2007, Test Code for Machine Tools - Part 3: Determination of Thermal Effects.

[4] ISO 10791-10: 2007, Test Conditions for Machining Centers - Part 10: Evaluation of Thermal Distortions.

[5] S. Weikert, R-Test, a New Device for Accuracy Measurements on Five Axis Machine Tools, Annals of the CIRP, 53, 1 (2004), 429-432.

DOI: 10.1016/s0007-8506(07)60732-x

[6] B. Bringmann, W. Knapp, Model-based Chase-the-Ball, Calibration of a 5-axis Machining Center, Annals of the CIRP, 55, 1 (2006), 531-534.

DOI: 10.1016/s0007-8506(07)60475-2

[7] ISO/CD 10791-6: 2011, Test Conditions for Machining Centers - Part 6: Accuracy of Feeds, Speeds and Interpolations.

[8] ISO 230-7: 2006, Test Code for Machine Tools - Part 7: Geometric Accuracy of Axes of Rotation.

[9] S. Ibaraki, C. Oyama, H. Otsubo, Construction of an Error Map of Rotary Axes on a Five-axis Machining Center by Static R-test, Int. J. of Machine Tools and Manufacture, 51 (2011), 190-200.

DOI: 10.1016/j.ijmachtools.2010.11.011

[10] C. Hong, S. Ibaraki, Graphical presentation of error motions of rotary axes on a five-axis machine tool by static R-test with separating the influence of squareness errors of linear axes, Int'l J. of Machine Tools and Manufacture, 59 (2012).

DOI: 10.1016/j.ijmachtools.2012.03.004

[11] C. Hong, S. Ibaraki, A. Matsubara, Influence of Position-dependent Geometric Errors of Rotary Axes on a Machining Test of Cone Frustum by Five-axis Machine Tools, Precision Engineering, 35, 1 (2011), pp.1-11.

DOI: 10.1016/j.precisioneng.2010.09.004

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