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US 7,452,171 B2Granted
Welding stud
AssigneeIllinois Tool Works Inc.
InventorsBruce Albrecht, Sean P. Moran, Sundaram Nagarajan, Mark Ulrich
Life of this patent
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Abstract
A welding stud apparatus and method of manufacturing a welding stud are disclosed. The welding stud has a weld end constructed to be welded to a workpiece that has at least one recess formed therein. The recess decreases an effective arc area of the weld end to localize a current therethrough and increase the efficiency with which the welding stud can be welded to a workpiece.
Claims29
A welding stud comprising:
- a body having a first end and a second end, the first end having an outer diameter that is greater than an outer diameter of the second end;
- the first end constructed to engage a stud welding gun;
- the second end having a central point on a weld face and at least one ridge and hollow recess formed in the weld face and spaced away from the central point;
- and
- wherein the central point has a diameter greater than a thickness of the at least one ridge and has a planar surface that is in a common plane with the at least one ridge.
2 more elements
A welding stud comprising:
- a connector end constructed to engage a stud welding gun;
- a solid cored body extending from the connector end;
- a weld end constructed to be welded to a workpiece having a plurality of ridges and grooves formed therein;
- and
- wherein the weld end includes at least one protrusion having a diameter greater than a thickness of each of the plurality of ridges and a planar surface that is in a common plane with the plurality of ridges.
2 more elements
A method of manufacturing a welding stud comprising the steps of:
- providing a welding stud having a first end and a second end;
- forming the first end to engage a stud welder;
- and
- forming the second end to be entirely welded to a workpiece and with means for increasing resistance to current flow through the second end in the area between a perimeter and a central area of the second end as compared to a welding stud having a nipple and a generally planar surface thereabout.
1 more element
A welding stud comprising:
- a first end constructed to engage a stud welding gun;
- a body extending from the first end to a face of a weld end, the face constructed to be consumed by a weld;
- means for localizing current density generally uniformly about a majority of an area between an area circumscribed by a perimeter of the face of the weld end of the welding stud and a nipple proximate an axis of the body.
A welding stud comprising:
- a body having a first end and a second end;
- the first end constructed to engage a stud welding gun;
- the second end having a weld face with a nipple extending therefrom and constructed thereabout with at least a portion of the weld face having decreased arc surface area, the nipple being in the same plane as the weld face having decreased arc surface area;
- and
- wherein the body is constructed to communicate weld power from the first end to the second end along a majority of the area defined by a perimeter of a cross-section of the body.
2 more elements
A welding stud comprising:
- a body having a first end and a second end, a head portion formed proximate the first end, and a shank portion extending between the head portion and the second end;
- the shank portion having a generally uniform diameter along the length thereof;
- the first end constructed to engage a stud welding gun;
- and
- the second end having a surface constructed with at least one protrusion arranged to face a workpiece and a remaining surface extending about the at least one protrusion that is configured with a contact area that is decreased compared to a planar surface.
2 more elements
Dependencies are inferred from the claim text.