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Understanding Capacitor Discharge Stud Welding

Utilises the energy stored in a bank of capacitors. This energy is discharged through a virtual short circuit creating a very high current for a short period of time (6 milliseconds). Capacitor Discharge is most commonly used with smaller diameter studs welded on to thin-based materials. Stud diameters can range from 3mm to 8mm. Stud materials are mild steel, stainless steel, aluminium and brass.

HOW IT WORKS

CONTACT MODE

  1. The stud is hand loaded into the gun chuck and stud is located on the work.
  2. The gun trigger is pulled, releasing the electrical energy in the capacitors. This rapid discharge disintegrates the projection pip on the end of the stud, creating an arc between the stud and the work resulting in a molten pool.
  3. Gun spring pressure forces the stud into the molten pool. The weld cycle takes place in approximately 2-3 milliseconds. The completed fastening develops the full strength of the stud and plate material and will not break in the weld area.

GAP MODE

KCD has a stud welding machine (CD 8000) specially developed for welding aluminium. The operation is similar to the Contact Method except that a solenoid in the gun holds the stud back creating a gap prior to firing.
>This Gap Method is ideal for signage applications.

 

BENEFITS USING THE CAPACITOR DISCHARGE SYSTEM

  • Cost Savings
    Using Stud Welding, rather than conventional welding methods, drilling, tapping, piercing and adhesives for insulation attachment, can cut labour and material costs.
  • Little or no reverse side marking
    The weld creates a perfect bond so neatly that highly polished or preprinted materials are left unmarked even on 0.6mm (0.024’) thickness.
  • Speed and Versatility
    Realistic welds at the rate of 15 per minute are obtainable.
  • Reliability
    By using the latest technology and solid state component parts, dependability is ensured, eliminating costly maintenance and down time.
  • Simple to Operate
    Unskilled operator is all that is required.
  • Portable
    Easily moved to where the work has to be completed.
  • No Flux Needed
    No flux, ferrules or inert gas required.
  • Very Safe
    Circuit breaker protects operator.
    Gun - low voltage 14vDC.

KCD Studwelding

ABN 38 108 395 027

96a Herald Street
Cheltenham Victoria
Australia 3192

Telephone: 03 9584 1588

International: +61 3 9584 1588

Facsimile: (+61 3) 9584 1688

Email: info@kcdstudwelding.com.au