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Spot Welding

Spot Welding

  • Is defined as Two copper electrodes are held in the jaws of the spot welding machine, and the material to be welded is clamped between them. The pressure is applied to hold the electrodes tightly together and electrical current flows through the electrodes and the material.
  •  The resistance of the material being welded is so much higher than that of the copper electrodes that enough heat is generated to melt the metal.
  • The pressure on the electrodes forces the molten spots in the two pieces of metal to unite, and this pressure is held after the current stops flowing long enough for the metal to solidify.
  • The amount of current, pressure, and dwell time are all carefully controlled and matched to the type of material and the thickness to produce the correct spot welds.

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