Resistance spot welding method
US10406627B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 18, 2014 |
| Grant date | Sep 10, 2019 |
| Priority date | — |
| Expiry date | Feb 4, 2036 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23K11/241
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
By superposing a plurality of steel sheets including a high tensile steel sheet and performing pulsation conduction by an inverter DC type spot welding power supply and controlling the conduction time of the current pulses, intervals of the current pulses, that is, conduction idle time, and weld current applied at the current pulses in a variable manner, the optimum weld conditions are obtained. For resistance spot welding of the hot stamped steel sheet, resistance spot welding with a minimum weld current of a second pulsation step higher than the maximum weld current at a first pulsation step is used to suppress the occurrence of outer spatter and inner spatter and secure a broad suitable current range even if using an inverter DC power supply.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.