Any joining process that relies on passing an electrical current through a workpiece. The heat is generated by the metal’s resistance to the electrical current.
In the tube and pipe industry, high-frequency, noncontact electrical resistance welding is so common that the abbreviations HF and ERW are used interchangeably. However, high-frequency isn’t the only useful ERW process. Many frequencies are used, including direct current, which has no frequency at all, as is contact welding.
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FABTECH reporter’s notebook: A contract metal fabrication metaphor, in tube - by Tim Heston Atlanta played host to FABTECH last week, when tens of thousands descended upon the Georgia World Congress Center. Most said they expected good times for 2015, but it's a complex business that requires careful coordination. A unique exoskeletal racecar on display last week proved to be an apt metaphor of metal fabrication at its best.
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