The Drawn Arc "DA" Process
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Current and weld time is pre-set to suit the diameter to be welded
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The stud is placed on the plate.
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Upon triggering a pilot arc occurs as the stud lifts to a pre-set height.
The main arc then melts in the weld end of the stud and creates a molten pool in the plate.
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Return spring pressure forces the stud into the molten pool. The ferrule contains the molten metal and shapes the fillet.
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Process
Very strong penetrative welds are achieved with this process. Ferrules required to contain and shape molten metal. Weld end of stud is fluxed
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Studs
Stud Diameter 3mm to 30mm
Material
Material thickness 2mm & above
Power
Power Requirements 3 Phase 230/380/415V
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Advantages
Burns through parent material laminations tolerates surface curvature and imperfections, e.g. light rust, scale grease and some coatings. Gives neat and controlled weld fillet.
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The only method of studwelding large diameters.
This process also lends itself to multiple applications.
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Drill Stand Unit
A production weld head is available.
Stand accepts both production weld head and the standard range of Drawn Arc handtools.
Particularly suitable for most low volume applications where the tolerance requirement is not less that +/- 0.35mm.
Comprises of a sturdy Bench Mounted Drill Stand fitted with clamps to accept a standard DA pistol
Can be fitted with a footswitch
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