Abstract
The three phase resistance welding machine recently imported by The Nippon Aluminium Mfg. Co., Ltd. from Soiaky Bros. Inc. is called PMM 4TC-300-60 rollspot and seam welder (300KVA at 50% duty cycle, short circuit secondary current, max. 130, 000 Amps.) and guranteed to satisfy U. S. Army-Navy Specification AN-W-30.We are going to report on sequence of various control panels, comparison between 3 phase and single phase welder, weling capacity of this welder, parameters of controls for spot welding two equal thickness of aluminum alloys and mild steel or 18-8 stainless steel, and the joint efficiency of seam-welded joints by this welder compared with that by a Japan made seam welder.
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