Hilti Aktiengesellschaft

Rainer Wild

Dankmar Tauern

Norbert Oehry

Small attachment members, such as clamps, mounting bars, identification plates, lugs and the like, are formed of shaped walls with at least one welding projection stamped from the wall arranged a contact the metallic base which projection limits the arc in condenser-discharge welding of the attachments and a punctiform projection centrally disposed on and extending outwardly from the welding projection is used for starting and controlling the condenser-discharge welding operation.

Attachment members arranged for weld fastening to a metallic base

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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Rainer Wild