Abstract:
A mechanism of excited arc to be an controlled "ultrasonic
emission source" is described. An developed electrical source
with an certain frequency bandwidth for the purpose of the
arc-excited is connected with an conventional welding power
supply through coupling the cables for the experiment. Some
resonant frequency hands for the arc-excited ultrasonic are
discovered in the welding process, and its frequency, amplitude
and phase' shift are recorded. This principle demonstrates that
arc can be used not only for a thermal source, but also for an
ultrasonic emission source, which may be extent to the industrial
application in some new way, such as for automatic welding
process control and quality inspection.
Key words: Arc-ultrasonic
Coupling Excite
*
This project
is supported by National Natural Science Foundation of China. Manuscript received on
April 20, 1998; revised manuscript June 1, 1998
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