resistance welding parameters and working principle

It is a group of process, the coalescence is obtained by the heat generated from electric resistance of welding and work piece is completed by application of pressure.when the heat is provided between two electrodes with low resistance and high current the heat is generated blow.Some of resistance welding parameters expressed below.

resistance welding diagram

 

resistance welding parameters:

H ∞ I2 R T

 I = Electric current (3000 to 100000 amps)

R = Resistance in ohms

T = Time duration of current flow

Other some resistance welding parameters:

Current frequency: 450000 cycles / second

Voltage: 4 to 25v

Power: 6 to 18 kw/cm2 of area

AC current is most convenient there is most important parameter in this welding process some type of this welding likely as butt welding, flash welding, high- frequency resistances welding, spot welding, upset welding, and seam welding.

Advantages:

  • Easy automation
  • Cost effectiveness
  • No filler material require
  • High weld rate
  • Low fumes

Disadvantages:

  • Thickness of weld sheet limited up to 6mm.
  • Low strength
  • High cost

The types of resistance welding is subdivide below:

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