Method of mending a friction stir welding portion
US6422449B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 17, 2000 |
| Grant date | Jul 23, 2002 |
| Priority date | — |
| Expiry date | Nov 17, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49726
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A welding bead 50 is formed along to a jointing potion 40 using friction stir welding on a first frame member 20 and a second frame member 30, each of which is a hollow extruded molded base member made of an aluminum alloy A6N01 material. When a defect exists in this welding bead 50, the welding bead including this defect is moved by a grinding processing and then a mending zone is formed. In this mending zone, a mending bead is formed using TIG welding. The welding rod used in this TIG welding is made of the same material as the base member of the frame member, and so the composition of the welding bead is formed homogeneously. In the friction stir welding portion, a hairline processing is performed, so that a surface having a beautiful appearance, in which a boundary between the frame members and traces of the defect are inconspicuous, can be obtained. In a case of manufacture of a structural body, such as a railway car, in which an aluminum alloy material is subjected to a friction stir welding, an improvement of the method of mending the friction stir welding portion can be achieved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.