Control method of resistance welding
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United States of America Patent
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Jan 6, 1987
Grant Date -
N/A
app pub date -
Sep 20, 1985
filing date -
Sep 21, 1984
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A control method of resistance welding for controlling weld conditions, such as welding current and welding time, in response to a change in material of weldments, which comprises the steps of detecting the local lowest value of resistance between electrode tips appearing in an initial welding period, comparing the detected lowest value with a plurality of reference resistance values preset correspondingly to materials of weldments of different sorts and divided into plural classes to determine the material of a weldment under process, and changing the weld conditions, such as welding current and welding time, depending upon the determined material.
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