A controller for a spot-welding machine compares the temperature evolution at a site at which a spot weld is being made to a standard thermal history stored in a digital read/write memory in controlling the welding current for the weld. Standard thermal histories can be generated and written into the memory as needed by an operator of the welding machine to take into account changes in operating conditions. The temperature evolution of the spot-welding operation is monitored by detecting radiant energy whose intensity provides a measure of a temperature of the weld. Phosphorescent radiation from a thermographic phosphor located in a welding tip of the welding machine and thermal infrared radiation are preferred for monitoring the temperature evolution of the spot-welding operation.
申请公布号
US4359622(A)
申请公布日期
1982.11.16
申请号
US19800150808
申请日期
1980.05.19
申请人
VANZETTI INFRARED & COMPUTER SYSTEMS, INC.
发明人
DOSTOOMIAN, ASHOD S.;RICHARD, ALAN A.;TRAUB, ALAN C.;VANZETTI, RICCARDO