Control method of spot welding
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
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)
Importance
Abstract
A spot welding control method is disclosed wherein the welding current and welding time are controlled, in response to changes in the shape of the point of the electrode tip. At each weld point, the lowest value of the varying resistance between the electrode tips is detected in an initial welding period, and each detected lowest value is successively held and stored. At each weld point, a running average of the lowest resistance values is computed, bases on the resistance date of a group of weld points composed of the weld point just completed through a number of preceding weld points, the number of which is preset. The weld conditions are changed from one set of predetermined parameters to another when the computed average reaches the then prevailing threshold limit, following which the threshold is reset. The thresholds are preset depending upon the degree of wear of the electrode tip, whereby welding is continued under newly-selected weld conditions corresponding to the present threshold.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully