Electric heating – Metal heating – For bonding with pressure
Patent
1981-07-21
1983-10-04
Shaw, C. C.
Electric heating
Metal heating
For bonding with pressure
219108, B23K 1100
Patent
active
044081154
ABSTRACT:
In an electric resistance welding machine for welding structural members together along a common region of contact through the intermittent application of heat generating electrical energy to said region of contact the combination of; electrode means adapted to releasably contact and clamp said members together so as to exert an external force to said members for urging said members together at said regions of contact, and to transmit and apply said electrical energy to said members in said region of contact on an intermittent basis, transformer means associated with said electrode means for supplying said electrical energy to be intermittently applied to said members in said region of contact, control means for controlling the intermittent application of said electrical energy to said region of contact for a selected timed interval, including means for interrupting said application of said electrical energy for a selected timed interval so as to present a series of intermittent impulses of said electrical energy adapted to incrementally raise the temperature of said members in said region of contact in stages so as to minimize the escape of said heat energy from said members in said region of contact and effectively weld said members together at said region of contact, said control means including first timing means for activating said application of said several impulses of electrical energy for a limited period at preset selected timed intervals, and second timing means for activating said interrupting means for a limited period at preset selected timed intervals.
REFERENCES:
patent: 1061376 (1913-05-01), Heany
T. Lyman, ed., Metals Handbook, vol. 6, "Welding and Brazing", 1971, pp. 408-414.
Green Weldon F.
Shaw C. C.
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