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Production Technology Laboratory Lab Experiments

Preparation of Square Tray using Spot Welding

Preparation of Square Tray using Spot Welding


To prepare the square tray using spot welding technique.

Equipment Required

Spot welding machine

Material Required:

Two G.I sheets of size



  • Switch on the machine and set the current in the machine to 2 Ampere
  • Set the timer to two seconds
  • Overlap the two metal pieces to the requires size and place them between the two electrodes.
  • Apply pressure by foot on the lever such that two electrodes come into contact if the over lapped metals.
  • After 2 seconds remove the pressure on the lever slowly.
  • Now the joint is ready for use.
  • Repeat the same procedure at various amperes
  • Test the strength of the joints using universal testing machine



  • Ensure that the electrodes should not be touched.
  • Don't touch the welded potion by hand immediately after the welding is done.