Method and apparatus for laser welding with mixed gas plasma suppression
US9102009B2 · kind B2 · utility
Inventor
Key dates
| Filing date | Sep 12, 2011 |
| Grant date | Aug 11, 2015 |
| Priority date | — |
| Expiry date | Aug 10, 2032 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23K26/24
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
Machinery and process are disclosed for laser welding. A beam is generated and focused on a discrete work surface, with a distinctive nozzle provided for delivering plasma suppression gas toward the surface. The nozzle has first and second inlets for receiving first and second sources of different plasma suppression gases, respectively. The nozzle has first and second outlets in fluid communication with the first and second inlets, respectively, together directing an externally mixed stream of the gases from the nozzle at an angle of incidence of 35 degrees to 50 degrees relative to the surface to impinge upon the generated plasma. The impinging stream intersects the beam at or above the surface, as the mixed gases are deflected across the beam. The invention saves on helium costs and demonstrably increases weld penetration.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.