What is resistance welding process?
Resistance welding, sometimes called electric resistance welding (ERW),is a process by which metals can be joined together by applying pressure and conducting a strong electric current through the metal combination to heat up the welding joint and melt the metals, forging them together.
What are the four types of resistance welding?
There are several different forms of resistance welding (e.g. spot and seam, projection, flash, and upset welding) which differ primarily by the types and shapes of weld electrodes that are used to apply the pressure and conduct the current.
What are the 3 basic types of resistance welding bonds?
There are three basic types of resistance welding bonds: solid state, fusion, and reflow braze.
What are the process parameters for resistance welding?
Parameters in Resistance Welding
- 1) Welding current.
- 2) Welding time.
- 3) Welding force.
- 4) Contact resistance.
- 5) Materials properties.
- 6) Surface coatings.
- 7) Geometry and dimensions.
- 8) Welding machine characteristics.
What are types of resistance welding process?
Following are the 5 different types of resistance welding:
- Spot resistance welding.
- Projection resistance welding.
- Seam resistance welding.
- Flash resistance welding.
- Butt resistance welding.
What type of welding is resistance welding?
Resistance welding is a group of welding processes in which coalescence is produced by the heat obtained from resistance of the work to the flow of electric current in a circuit and by the application of pressure (4). Examples of resistance welding include spot welding, induction welding, and flash welding.
What is the formula for resistance welding?
UNDERSTANDING A RESISTANCE SPOT WELD
H =I2RT is the actual formula for resistance welding, where H= Heat, I = Current passing through the metal combination, R is the resistance of the metal and contact surfaces and T = Time, or the duration of current flow.
What are the applications of resistance welding?
Resistance seam welding can be used to make gas- or fluid-tight joints in a variety of sheet metal fabrications. Steel fuel tanks for motor vehicles are a prime example. It is also used in making tin cans, steel drums and domestic radiators.
Which electrode are used in resistance welding?
In the resistance welding process, the parts to be joined are pressed together and heated by an electric current until a molten pool forms at individual points between them.
What is resistance welding give an example?
What are the limitations of resistance welding?
The work section thickness is limited because of the current requirement. It is less proficient for high-conductive equipment. It consumes high electric-power. Weld joints contain small tensile & fatigue power.