RESISTANCE WELDING
The process of welding metal pieces by passing heavy current through them which results in a local heating of these pieces ,and then completing the weld by the application of pressure.is known as resistance welding .
Principle : It is based on the well known principle that heat is generated by the resistance offered to the flow of electrical current. since the interface the two joining surfaces is the point of greatest resistance ,it is also the point where greatest heat is generated . In simple resistance welding a high -amperage low voltage current is passed from one adjoining workpiece to the other until becomes heated to a temperature that is high enough to cause localised fusion and the formation to sequeeze the two parts into a localized homogeneous mass.
TYPES OF RESISTANCE WELDING
The principle types of resistance welding may be enumerated as below
1.spot welding 2. Projection welding 3.Seam Welding 4.Butt welding 5. flash welding 6. percussion welding
The process of welding metal pieces by passing heavy current through them which results in a local heating of these pieces ,and then completing the weld by the application of pressure.is known as resistance welding .
TYPES OF RESISTANCE WELDING
The principle types of resistance welding may be enumerated as below
1.spot welding 2. Projection welding 3.Seam Welding 4.Butt welding 5. flash welding 6. percussion welding
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