Stud holder for a stud welder
AssigneeOBO Bettermann OHG
InventorPeter Broszukat
Life of this patent
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Abstract
The stud holder has in the interior of the supply passage of the stud holder proximal to the workpiece side of the clamp jaws, a circular groove for engaging and holding a headlike enlargement of the stud in a plane perpendicular to the axis of the clamp jaws. The supply passage is constricted conically, narrowing in the feed direction of the stud, upstream of the circular groove with respect to feed of studs at least adjacent the clamp jaws. The jaws are expandable against a spring tensioned under influence of the stud as the stud is fed.
Claims8
In a stud holder in a stud welder for welding studs to a workpiece, said studs each having a shaft formed at an end with a rotationally symmetrical outwardly projecting head, and wherein each of said studs is fed to said stud holder with said shaft directed toward said stud holder, so that a free end of a shaft of each stud, when held by clamp jaws of said stud holder, projects toward said workpiece from a workpiece side of said clamp jaws, the improvement wherein:
- in the interior of a supply passage of said stud holder proximal to the workpiece side of said clamp jaws, an inwardly open annular groove for engaging and clamping said head is formed in a place perpendicular to an axis of said clamp jaws, said groove having converging sides;
- said supply passage is constricted conically, narrowing in a feed direction of said studs;
- and
- said jaws are expandable against a spring force by advance of said stud through said passage to lodge said head in said groove and said jaws comprising a plurality of interchangeable clamping members.
Dependencies are inferred from the claim text.