Designed to produce high welding forces without deflection, T. J. Snow’s heavy duty press- type resistance welders are available in a variety of set-ups including Spot Welders with arms, Projection Welders with platens, and Combination Spot and Projection with both arms and platens.
Standard AC transformer sizes range from 50-500 KVA, with larger capacities and custom options available. MFDC and Three Phase Frequency Converter power supplies are also available.
Projection welding can be broken down into three main categories, all of which involve just one stroke of the machine.
The most common form of projection welding involves attaching fasteners, such as nuts and studs, with typically three or four projections to focus the heat. Other common applications involve welding multiple projections embossed in sheet metal.
Ring projection welding creates an air or water tight seal.
Welding of crossed wire fabrications presents the perfect point-to-point joints
Spot welding is accomplished with pointed electrodes that concentrate the heat. These electrodes mushroom with use and must be redressed or replaced. The beauty of projection welding is that the electrodes are flat and serve only to conduct the welding amps to and through the projections, which results in the equivalent of a new set of electrodes for each weld.
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