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Latest additions to our range of studwelding equipment are now available.
       

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New to Studwelding?

DA = Drawn Arc.

CD = Capacitor Discharge.

SC = Short Cycle.

These are three different types of studwelding methods in everyday use.
The menu above will guide you to the various section of our web pages where you will find more information for each process and products.

 

The Best Process

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.  Click here
  • Capacitor Discharge (CD)
  • Short Cycle (SC)
  • Drawn Arc (DA)
The above are complimentary and should not be regarded as alternatives. 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:-
(There are other types of stud welding - should you require information, call our office)
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
gives the greatest material penetration. Weld zone extends to one third of stud diameter so burn through limits the minimum plate thickness.

 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.

Capacitor Discharge M2.5 to M10 dia
Energy is stored in a bank of capacitors charged to a pre-set voltage determined by a type of stud and parent material.
When triggered, energy discharges as a high current pulse, melting the pip to produce an arc.
Spring pressure forces the stud onto the molten surface to ensure complete fusion across the flange.
Weld duration under 4 milliseconds.

To see the procedure and additional information
Select "CD Process" in main menu.

Short Cycle M2.5 to M8 dia
A transfer rectifier supplies a fixed current power source.
Triggering produces a pilot arc and the stud lifts to a pre-set height.
The main arc melts the end of the stud, producing a molten pool in the parent material.
Return spring pressure then forces the stud into the pool.
Using a shrouding gas reduces weld spatter especially with stainless steel.
Weld duration: 10 to 100 milliseconds
To see the procedure and additional information
Select "SC Process" in main menu.
Drawn Arc M5 to M25 dia
Current level and duration are determined by the stud diameter.
Triggering produces a pilot arc and the stud lifts to a pre-set height.
The main arc melts the end of the stud, producing a molten pool in the material.
Return spring pressure forces the stud into the molten pool.
A ceramic ferrule contains and shapes the weld fillet, this arc shield is not re-usable.
Weld duration: 100 to 10000 milliseconds
To see the procedure and additional information
Select "DA Process" in main menu.