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AssigneeHilti Aktiengesellschaft
InventorsAndreas Starzengruber, Philipp Dörner
Estimating the term…
A stud welding process and a stud welding device for welding a stud to a workpiece are provided, wherein an arc (LB) is generated between the surface of the stud that faces the workpiece and the workpiece by using a pulsed welding current (Is), and the arc (LB) is deflected by a magnetic field which is generated by a coil through which a current (IA) flows. The current (IA) through the coil for generating the magnetic field for deflecting the arc (LB) is activated synchronously and in anti-phase with the welding current (Is) by a current (IA) always being applied to the coil when the welding current (Is) is at a minimum, and the coil being switched off or the current (IA) through the coil being reduced to a minimum when the welding current (Is) is at a maximum.
A stud welding method for welding a stud to a workpiece (2), wherein with an aid of a pulsed welding current (Is) an arc (LB) is generated between a surface of the stud facing the workpiece and the workpiece, and the arc (LB) is deflected with an aid of a magnetic field generated by a coil through which a current (IA) flows, the method comprising controlling the current (IA) synchronously and in opposition to the pulsed welding current (Is) through the coil for generating the magnetic field for deflecting the arc (LB), by applying a current (IA) to the coil whenever the pulsed welding current (Is) is minimal, and the coil is switched off or the current (IA) through the coil is reduced to a minimum when the welding current (Is) is maximum.
A stud welding device for welding a stud to a workpiece, having a welding current source for providing a pulsed welding current (Is) for generating an arc (LB) between a surface of the stud facing the workpiece and the workpiece, and having a coil for generating a magnetic field for deflecting the arc (LB), comprising a control device for controlling the current (IA) provided by the coil synchronously and in opposition to the pulsed welding current (Is), so that the coil can always be supplied with a current (IA) when the pulsed welding current (Is) is minimal, and so the coil is switched off or the current (IA) through the coil is reduced to a minimum when the pulsed welding current (Is) is maximum.
Dependencies are inferred from the claim text.