projection ¿ëÁ¢(projection welding)

Projection welding is a metal-joining process where heat obtained from an electrical current passed between projections or embossments causes the two mating workpieces to fuse together. Workpieces are held together under pressure exerted by the nonconsumable electrodes.

Process Characteristics

1. Requires no filer metal or fluxes
2. Requires a performed projection, embossment, or intersection on one of the workpieces
3. Can produce multiple spot welds in one cycle
4. Uses nonconsumable, low resistance copper alloy electrodes
5. Is used primarily on sheet metals or on relatively low-mass workpieces
6. Is easily automated