- Spot welding is generally accomplished with large machines.welding project image by leemarusa from Fotolia.com
In the process of welding, metal pieces are permanently combined. The pieces are melted, then pressed together as they cool. Spot welding, also known as resistance welding, is a fast way to join thin metal parts--like sheet metal--together. - Spot welding allows for two or more metal pieces to be combined. The process can be applied to virtually any kind of metal. Spot welding machines apply high temperatures and pressure to a single or multiple spots on a part. The machines consists of two copper electrodes which are fastened around the piece that is going to be welded. Intense pressure is then applied while heat is pumped through the copper electrodes, which causes the metal to melt and bond.
- Brazing is similar to welding except the metal parts being connected do not melt. Rather, a third connector metal (one which generally melts at a lower temperature than those being joined) is heated to its melting point then joined to the other two pieces. Brazing can be used to make jewelry, engine parts and refrigerators, among other things.
- Seam welding is a process by which impenetrable seals can be created in metal. Generally used with metals with high conductive capacities--thereby making them harder to spot weld--seam welding uses copper wheels and electric pulses to create a continuous combination point that is air- and water-tight and can be used for gasoline tanks and other containment vessels.
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