Hilti Aktiengesellschaft

Norbert Oehry

Rainer Wild

A welding gun for a capacitor discharge bolt welding device includes a thrust unit axially movably positionable within the housing. A collet chuck is fitted on the forward end of the thrust unit and holds individual bolts in position for the welding operation. A stop threadedly secured within the housing is adjustably positionable in the axial direction of the thrust unit relative to the housing for selectively adjusting the lead between the forward end of a bolt held in the collet chuck and the forward end of the supporting feet extending axially from the forward end of the housing.

Adjustable stop for a bolt welding gun

A bolt welding gun is provided with supporting legs extending outwardly from the gun housing which can be displaced to accommodate different bolt-attaching situations. The supporting legs can be mounted in a ring-shaped housing part which is rotatable about the driving axis of the gun. Alternatively, the ring-shaped housing part can be formed of individual segments with at least one segment arranged to be pivoted about an axis parallel to the driving axis. In another embodiment, the part of the housing to which the supporting legs are secured, can be provided with a plurality of receptacles greater in number than the supporting legs used so that the legs can be moved between the receptacles in accordance with the support arrangement desired.

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Norbert Oehry