Coated material welding with multiple energy beams
US6608278B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 26, 2001 |
| Grant date | Aug 19, 2003 |
| Priority date | — |
| Expiry date | Oct 26, 2021 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23K2103/50
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
To overcome 1) the high levels of porosity due to coating material vaporization and entrapment into the weld, 2) spewing of molten base metal from the weld leaving holes and pits in the weld, and 3) humping effects when oblong beam configurations are used at higher weld speeds to weld coated materials, the present invention features an energy source (10) with multiple separated energy beams (24, 26) (formed by using multiple separate beam sources or manipulation of a single beam (14) into separated multiple energy beams (44, 46) using wedge mirror (18) and parabolic focusing mirror (20)) that produces high quality (porosity free) lap welds in a weld stack (50) of layered materials (30, 32) coated with coating material (28, 28′, 34, 34′) with zero gap at interface (38) during the welding process. An energy source (12) with multiple, separated energy beams (24, 26) extends the beam keyhole and increases the time and conditions available for vapor/gas to diffuse less violently through the molten weld pool.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.