Friction stir welding method
US6866181B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 6, 2003 |
| Grant date | Mar 15, 2005 |
| Priority date | — |
| Expiry date | May 10, 2023 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23K20/122
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
There is provided a method capable of decreasing a friction force in friction stir welding, in which a welding tool is used. In a method of friction stir welding workpieces together by rotating and pressingly plugging a welding tool, formed from a harder material than the workpieces, into a weld zone of the workpieces and moving the welding tool relatively in a welding direction, a power supply device allows a current to flow between the welding tool 1 and the workpieces to cause resistance heating of the welding tool. Combined use of resistance heating makes it possible to decrease a friction force. Preferably, a conductive ceramic is coated on surfaces of the welding tool to cause resistance heating.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.