Spot welding apparatus and its power supplying method
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United States of America Patent
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-
Oct 1, 1996
Grant Date -
N/A
app pub date -
May 23, 1995
filing date -
May 26, 1994
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A spot welder apparatus includes: a single welding power source (5); a welding current distributor (7) connected to the single welding power source; and a plurality of spot welders (1A, 1B, 1C) connected to the welding current distributor. Each of a plurality of the spot welders is activated alternately by welding current distributed by the welding current distributor. When two start signals are generated almost simultaneously, a first spot welder which generates the start signal earlier is activated, and a second spot welder which generates the start signal later is kept under pressurized condition. Immediately after the first spot welder is deactivated, the second spot welder is then activated. The spot welder apparatus is low in cost and small in installation space, without increasing the user' current capacity.
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Cited Art Landscape
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