Effects of water flow rate on transparent window size for form error in-process optical measurement

Y. Gao; J. X. Wang; Y. Zhang; Y. Lai

doi:10.1117/12.885892

28 December 2010 Effects of water flow rate on transparent window size for form error in-process optical measurement

Y. Gao, J. X. Wang, Y. Zhang, Y. Lai

Proceedings Volume 7544, Sixth International Symposium on Precision Engineering Measurements and Instrumentation; 75440M (2010) https://doi.org/10.1117/12.885892
Event: Sixth International Symposium on Precision Engineering Measurements and Instrumentation, 2010, Hangzhou, China

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 Q_w is one of the five important parameters to give a reasonably acceptable transparent window size A_t 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 A_t will increase with the water flow rate Q_w and will decrease with the height of medium hm, coolant concentration c_c, table velocity v_t, and water channel diameter Φ_w. Based on the results of A_t(Q_w,h_m) and the results of A_t(Q_w,v_t), the ranges of Q_w∈[0.65,0.75] ml/s, h_m∈[0.5,0.55] mm, and v_t∈[120,150] mm/s would give a transparent window size A_t∈[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.

Citation Download Citation

Y. Gao, J. X. Wang, Y. Zhang, and Y. Lai "Effects of water flow rate on transparent window size for form error in-process optical measurement", Proc. SPIE 7544, Sixth International Symposium on Precision Engineering Measurements and Instrumentation, 75440M (28 December 2010); https://doi.org/10.1117/12.885892

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