Surface Roughness Measurement by Ultrasonic Sensing for In-Process Monitoring

[+] Author and Article Information
Y. C. Shin, S. J. Oh, S. A. Coker

School of Mechanical Engineering, Purdue University, West Lafayette, IN

J. Eng. Ind 117(3), 439-447 (Aug 01, 1995) (9 pages) doi:10.1115/1.2804352 History: Received August 01, 1993; Revised June 01, 1994; Online January 17, 2008


This paper presents a new surface roughness measurement technique suitable for in-process monitoring in production machining processes. The technique is based on the utilization of focused ultrasonic beams with non-zero incidence angle and measurement of reflected intensities. Fundamental principles and the measurement system developed are described along with experimental results. The tests were conducted to test the sensitivity and robustness of the proposed technique with various milled surfaces and materials. The results show excellent correlations with those obtained by a profilometer. In addition, it is shown that the periodicities of the surface profile corresponding to feed marks can be extracted from the measured ultrasonic signals, thus providing the possibility of profiling. Finally, in-process monitoring of surface roughness during machining is demonstrated with the proposed technique.

Copyright © 1995 by The American Society of Mechanical Engineers
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