RESEARCH PAPERS: Additional Technical Papers

Weld Pool Impedance Identification for Size Measurement and Control

[+] Author and Article Information
M. Zacksenhouse, D. E. Hardt

Department of Mechanical Engineering, Laboratory for Manufacturing and Productivity, Massachusetts Institute of Technology, Cambridge, Mass. 02139

J. Dyn. Sys., Meas., Control 105(3), 179-184 (Sep 01, 1983) (6 pages) doi:10.1115/1.3140652 History: Received August 23, 1982; Online July 21, 2009


A primary indicator of weld quality is the size of the bead produced, and for full penetration welds this size parameter can be reduced to the width of the backbead. A method for determining this width in real-time is proposed that measures the natural frequency of pool motion when driven by a time varying arc plasma force. This method is developed analytically and verified experimentally for stationary weld pools. A control system based on this measurement scheme is also developed and simulation results are presented.

Copyright © 1983 by ASME
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