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Proceedings Paper

Effects of water flow rate on transparent window size for form error in-process optical measurement
Author(s): Y. Gao; J. X. Wang; Y. Zhang; Y. Lai
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Paper Abstract

In-process form error measurement provides feedback for precision control. There many existing studies on in-process roughness and size measurement but few on in-process form error measurement. Water beam based in-process form error measurement is proposed to solve the opaque problem of the commonly used coolant in precision machining. Factorial test results show that the water flow rate Qw is one of the five important parameters to give a reasonably acceptable transparent window size At for the in-process form error measurement. In this project, both experimental and computational studies were conducted and the results show that transparent window size At will increase with the water flow rate Qw and will decrease with the height of medium hm, coolant concentration cc, table velocity vt, and water channel diameter Φw. Based on the results of At(Qw,hm) and the results of At(Qw,vt), the ranges of Qw∈[0.65,0.75] ml/s, hm∈[0.5,0.55] mm, and vt∈[120,150] mm/s would give a transparent window size At∈[20,40] mm2, which is reasonably acceptable for the laser measurement currently for the tests. The results will be useful for design of the in-process sensor.

Paper Details

Date Published: 28 December 2010
PDF: 7 pages
Proc. SPIE 7544, Sixth International Symposium on Precision Engineering Measurements and Instrumentation, 75440M (28 December 2010); doi: 10.1117/12.885892
Show Author Affiliations
Y. Gao, Hong Kong Univ. of Science and Technology (Hong Kong, China)
J. X. Wang, Hong Kong Univ. of Science and Technology (Hong Kong, China)
Y. Zhang, Hong Kong Univ. of Science and Technology (Hong Kong, China)
Y. Lai, Hong Kong Univ. of Science and Technology (Hong Kong, China)


Published in SPIE Proceedings Vol. 7544:
Sixth International Symposium on Precision Engineering Measurements and Instrumentation
Jiubin Tan; Xianfang Wen, Editor(s)

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