Laser-welding method for stacked workpieces
US7977620B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 8, 2008 |
| Grant date | Jul 12, 2011 |
| Priority date | — |
| Expiry date | Dec 28, 2028 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23K2101/18
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A laser welding method for stacked workpieces. A laser irradiation diameter that is irradiated on a surface of one workpiece among two stacked workpieces is set such that a laser irradiation diameter at a weld ending-edge portion is equal to or greater than approximately 1.5 times a laser irradiation diameter at a weld starting-edge portion. Thus, at the weld ending-edge portion, the material is melted in a wider area compared to a conventional example, and therefore, the melted material is supplied to the center portion of the weld ending-edge portion while the weld ending-edge portion is solidifying. As a result, a depth of the recess at the weld ending-edge portion can be made shallow enough to guarantee the welding quality of each of the workpieces.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.