Resistance welding
US4920247A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 14, 1988 |
| Grant date | Apr 24, 1990 |
| Priority date | — |
| Expiry date | Nov 14, 2008 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23K11/0053
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
The endwise resistance welding of a weld coupling to a plate. The weld coupling is mounted in a collet which is mounted slideably in a cavity in a block of conducting material. In the standby condition of the apparatus the collet is urged outwardly of the cavity by a spring between the block and the collet. The end of the block at the entrance to the cavity and the outward end of the collet have frustro-conical or tapered surfaces tapered at the same angle to the common axis of the block and collet. The surfaces are face-to-face. This assembly including the weld coupling is mounted on the movable electrode of the welder. During welding this electrode is moved towards the cooperative electrode, on which the plate is mounted, compressing the weld coupling against the plate. Under the reactive forces from the coupling and plate, the collet is moved inwardly of the block causing the tapered surface of the collet to slide with a cam-like motion along the tapered surface of the block. The collet is clamped tightly to the weld coupling and the engagement of the tapered surfaces complete a low-resistance path for the welding current from the movable electrode, through the block, the collet…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.