Torch for gas shielded arc welding using consumable electrode
US6392184B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 19, 2000 |
| Grant date | May 21, 2002 |
| Priority date | — |
| Expiry date | Oct 19, 2020 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23K9/295
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A welding torch comprises a torch body having a wire guide cylinder for guiding a welding wire; an internal cylinder fitted to the torch body in such a manner as to surround the wire guide cylinder; and an external cylinder fitted to the internal cylinder in such a manner as to surround the internal cylinder. The primary interception of outside air is effected with a second shielding gas layer blown off from a second gas passageway on the outer side, and the complete interception of outside air is effected with a first shielding gas layer blown off from a first gas passageway on the inner side. Consequently, it is made possible thereby to sufficiently prevent outside air from reaching a molten pool and also sufficiently suppress the generation of an unfavorable surface oxide, thus enabling welding work to be satisfactorily practiced by using the above welding torch.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.