Welding Processes

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Resistance Welding / Projection Welding

Resistance and projection welding use time and pressure to form a weld joint. There is no arc used in this process. Electrode "pinch" the joint together. Electrical current is then passed through this joint. The pressure applied reduces the resistance at that joint and it causes the joint to get hot. The combination of heat and pressure causes the two pieces to fuse together.

There is no arc involved. Often time pieces can be more precisely located due to pilot holes in the substrate. No flux, gas or filler metal is required.

Often used on sheet metal to sheet metal welding as in automotive assembly. Used with projection fasteners, often with a pilot for quick, accurate location.

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