Arc spot welding method and welding apparatus for working the same
US10500681B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 6, 2015 |
| Grant date | Dec 10, 2019 |
| Priority date | — |
| Expiry date | Oct 4, 2036 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23K9/02
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
An arc spot welding method able to give a predetermined weld bead diameter or excess metal height in a back surface weld bead of arc spot welding and able to give a welded joint excellent in both strengths of TSS and CTS and a welding apparatus for working the same are provided. Steel sheets containing carbon in 0.2 mass % or more and having sheet thicknesses “t” or more are arranged overlaid. A backing plate including a non-contact part and a contact part maintaining the back surface of the lower side steel sheet is provided. An arc generation and short-circuit conduction where the welding voltage between the welding wire and upper side steel sheet becomes 10V or less are alternately repeated so that the time period of the short-circuit conduction becomes over 30% to less than 60% per cycle to thereby weld the steel sheets.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.