Friction stir welding method and component part welded by the method
US7097091B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 23, 2002 |
| Grant date | Aug 29, 2006 |
| Priority date | — |
| Expiry date | Aug 29, 2023 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23K2103/22
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
Disclosed is a friction stir welding method for welding two members to be welded which differ in physical properties and/or mechanical properties by abutting the two members to each other, inserting a pin portion of a rotary tool having the pin portion and a shoulder portion to the abutment surfaces of the two members, and moving the rotary tool along the abutment surfaces. The pin portion is inserted to only one of the members, the pin portion is not inserted to the other of the members but only the shoulder portion is set in contact with the other of the members, and, while this condition is maintained, the rotary tool is moved. With this method, only the member on the side where the pin is inserted can be made to undergo plastic flow attendant on a friction stir action. The metal in plastic flow is pressed against the opposite member at an elevated temperature and high pressure, whereby diffusion of atoms is caused in the vicinity of the abutment surfaces, and the members are welded.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.