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The Short Cycle Proces
This process is the same for Drawn Arc (DA) but operates over a much shorter time period - up to 100 milliseconds.
Ceramic Arc Shields (Ferrules) are not required with this process but shrouding with gas can improve weld fillet formation especially when welding Stainless Steel studs.
Capacitor Discharge studs may be used.
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A transfer rectifier supplies a fixed current power source.
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Triggering produces a pilot arc and the stud lifts to a pre-set height.
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The main arc melts the end of the stud, producing a molten pool in the parent material
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Return spring pressure then forges the stud into the pool.
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| NOTE: Using a shroud and gas reduces weld spatter. |
Process
Short Cycle gives greater penetration into the workpiece that CD.
When the surface is uneven, and DA would burn through the parent material, then SC should be used.
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Material
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.
Equipment
Medium weight & hand portable controllers. Lower cost than DA but more than CD.
Three phases 380/415 volt 50HZ
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Advantages
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.
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Drill Stand Unit
A production weld head is available.
Stand accepts both production weld head and the standard range of 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 SC pistol
Can be fitted with a footswitch
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