A compact remote transformer and low profile heating inductor will be used for preheating prior to gas metal arc welding (GMAW). Ajax Tocco Magnethermic supplied the system to a forestry products manufacturer.

This equipment was sold as a field-install kit that is compatible with and utilizes the company’s existing induction heating cables and accessories. The heating inductor floats above the weldment without making contact. Versatility and utilization of the 35-kW induction heater were immediately increased.

The custom-built, compact, noncontact weld preheat inductor provides heating accuracy, rapid heat rates and repeatable, traceable results. The size of the inductor is orders of magnitude smaller than existing weld preheat inductors currently offered for moving/rotating parts. The compact inductor can be located anywhere the weld torch can be positioned. The 1" thick weldment is easily preheated to 400°F (204°C) at 18" per minute.