V
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21A
INTRODUCTION TO STUDWELDING
7
The Taylor Studwelding DA6 HI
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LIFT studwelding pistol when matched with an appropriate
controller and earth cables is intended for accurate stud welding up to 30 mm diameter
studs. The pistol is lightweight, ergonomic and has been designed to operate with a
minimum amount of maintenance. The DA6 HI
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LIFT has been specifically designed to have
an increased lift capacity especially when welding with increased protrusion e.g. When
welding shear connectors (concrete anchors) thru
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deck.
The energy required to carry out the welding operation is derived from an appropriate
studwelding controller.
Taylor Studwelding Systems Ltd controllers are modern, robustly designed and offer
maximum reliability combined with an easy to understand operator interface.
THE PROCESS
The process of drawn arc studwelding is long established and well proven. The basic steps
are as follows :
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A measured amount of weld stud protrusion is set at the welding pistol.
•
Once in position, the pistol lifts the stud away from the work
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piece, simultaneously
striking an arc between the two.
•
Both the tip of the weld stud and the surface of the work
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piece melt as the arc is
sustained for a pre
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determined interval.
•
At the completion of the pre
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determined interval, the pistol returns the weld stud to
the molten pool on the work
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piece, thus forming a weld.
The most common and traditional drawn arc welds have a weld duration greater than
100ms and employ the use of a single use ceramic arc shield, commonly referred to as a
ferrule. This ferrule helps to protect the arc during the weld and assists in formation of the
final fillet. Post welding the ferrule is removed and disposed of.
