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JWJ > Volume 29(1); 2011 > Article
Journal of KWJS 2011 February;29(1) :115-122.
Published online March 4, 2011.
In-Process Monitoring of Micro Resistance Spot Weld Quality using Accelerometer
HeeSeok Chang, HyoChul Kwon

Correspondence:   Published online March 4, 2011
ABSTRACT
  This study is to propose an in-process monitoring system for micro resistance spot welding processes using minute accelerometer. A minute accelerometer is mounted on the upper moving electrode tip holder. With its high sensitivity and frequency response characteristics, accelerometer output signal has been successfully recorded and integrated twice to reflect electrode expansion during micro spot welding processes. The analysis of electrode expansion pattern was attempted to find its correlation with spot weld quality. Major previous findings1-6) regarding spot weld quality assessment with the electrode expansion signal in large scale resistance spot welding processes were proved to be true in this in-process monitoring system.
Keywords: Micro spot welding;Accelerometer;Dynamic electrode movement;Nugget size
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