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Capacitor Discharge Stud Welding Machine

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In this method a small projection (pip) at the end of the stud makes contact with the work-piece and energy from the bank of charged capacitors is discharged across the contact, melting the stud projection and creating shallow molten pool in the parent plate. At this time the stud is pushed into the work-piece under controlled spring pressure, completing the weld. Energy required for given welding operation is obtained by selection of voltage across the capacitor.

This process minimizes the depth of penetration into the parent metal surface and is used for welding smaller diameter ferrous and non-ferrous studs on light gauge material. The stud can be welded on the reverse side of coated or finished sheet with little or no marking on the finished side.

  • Uniform high welding quality
  • Application to different materials
  • No re-working necessary on the other side of the weld
  • No additional material necessary, such as flux, inert gas
  • Elimination of different operations such as drilling, riveting etc.
  • No leakages even when welding on containers


  • Control panels
  • Elevator panels
  • Sound proof canopies
  • Cookware
  • Shipbuilding
  • Super market display
  • Electro-static precipitators
  • Insulation
  • Steel furniture
  • Cabinets and racks

Technical Details:

Stud welding range

M3 to M8

Welding Method

Tip Ignition

Power source

Capacitor Bank


66000 micro fahrad

Charging Voltage

50 to 200 Volts variable

Welding Time

0.001 - 0.003 sec

Welding Speed

Upto 10 studs per min. Depending on stud diameter

Power Supply

230 Volts 50 Hz Single Phase

Welding Cable

3 mtrs Highly flexible

Ground Cable

2x3 mtrs Highly flexible


470x250x270 mm


30 Kgs


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