Method for double end stud welding
US4339653A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 19, 1979 |
| Grant date | Jul 13, 1982 |
| Priority date | — |
| Expiry date | Nov 19, 1999 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23K9/20
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
Method and apparatus for simultaneously welding by the stud end welding technique a stud having two or more ends. The stud includes at least one elongated relatively thin metallic projection from each end of the stud to be welded. The method and apparatus maintains a current density in a given projection sufficient to disintegrate only a portion of each projection with consequent arc initiation upon contact with the base metal such that the disintegration of a given projection will permit the remaining projections to contact the base metal causing a short to extinguish the one arc which has been initiated and consequent disintegration and arcing of the next tip to strike the workpiece which procedure proceeds randomly from tip to tip until the ends of the stud reach the molten metal pools. The studs and footpiece for the welding gun are of a configuration to insure proper alignment of the stud with respect to the workpiece while the footpiece of the gun includes means for securing to arc shields properly in place.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.