A choice of the different studwelding process most syuitable to your applications.
Select the Studwelding Process most suitable for your production department.Please contact our Sales Team if you would like to discuss your production requirements in detail.
- Capacitor Discharge (CD)
- Short Cycle (SC)
- Drawn Arc (DA)
With each method, a weld stud is held in a hand tool or production head, then presented squarely
to the work piece. The three processes work as follows:-
The Process |
Parent Material |
Equipment |
| CAPACITOR
DISCHARGE is ideal for thin gauge; cold rolled sheet where reverse marking can be minimised or eradicated. Penetration into the work piece is minimal. |
For CD the sheet can be as thin as 0.7mm. Mild Steel, Stainless Steel, Aluminium Alloy and Lead Free Brass. Sheet surfaces should be clean and flat. Stud weld end must have precise pip and cone. | CD
controllers are lightweight and hand portable. Lower cost than SC and
DA. Single phase 230/110 volt 50HZ. |
| SHORT CYCLE gives greater penetration into the work piece than CD. When the surface is uneven, and DA would burn through the parent material,then SC should be used. |
The sheet thickness for SC should be greater than 1.5mm. Main applications are with Mild Steel but can also be used with Stainless Steel. More suitable than CD where surface is uneven, coated with oxide, mill scale or dirt. | Medium weight & hand portable controllers. Lower cost than DA but more than CD. Three phases 380/415 volt 50HZ. |
DRAWN ARC |
Above 2mm in thickness. Mild Steel, Stainless Steel and some Aluminium Alloys, DA is the most tolerant of surface irregularities, e.g. rust, mill scale, oil, and dirt. Stud weld end is fluxed and length increased by a burn off allowance. | DA controllers are mobile (on wheels). Can be modified to operate two hand tools. Three phase 380/415 volt 50HZ. |
The Advantages |
||
Capacitor Discharge |
Short Cycle |
Drawn Arc |
| Low
stud costs, Low cost equipment. The fast process Ideal for production systems from simple bench mounted to high speed automatic CNC. Easy to jig, no ferrules. No shrouding gas,Clean welds. No finishing. |
Low
cost studs. Greater stud design flexibility due to no pip required on the weld end. Equipment can be bench mounted and automated. Tolerates surface irregularities – Easy to jig – No ferrules. |
DA
is the most tolerant process of surface imperfections. Burns through material laminations. The only method which can weld studs above M10 dia. Correct length after weld (LAW) and neat even fillet indicates a good weld. |
