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Flash and Butt Welders
Practical Resistance Welding
7 other sections not shown
acid Alclad aluminium amps anode applied assemblies butt welding cathode circuit Clamp cleaning coating coil component condenser conductivity contact resistance contactor copper cost current flow discharge duralumin electrical electrode material electrode pressure electrode tips employed energy equipment factor flash welding gauge gun welders half-cycles high forging igniter ignitron Illus increased inductance light alloys load machine settings maximum metal method mild steel number of spots obtained operation oxide pickle pinch welders positive production projection welding range reagent relay resistance welding machines rheostat rivet satisfactory seam welder seam welding secondary shear strength sheet Sherardised shown in Fig sine wave spot welder spot welding spot welding machine suitable supply switch temperature test pieces thickness thyratron timer tip diameter treatment trigger tubes valve voltage volts weld strength weldability welding current welding cycle welding electrodes welding heat welding pressure welding transformer