Rotating tool for and method of friction stir welding
US12162088B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Feb 27, 2020 |
| Grant date | Dec 10, 2024 |
| Priority date | — |
| Expiry date | Oct 25, 2040 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23K2103/10
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A pressure receiving surface inclined to a rotation axis is provided on the side surface of a stir probe of a rotating tool. The pressure receiving surface includes a pressure receiving region which is always perpendicular to a rotation tangential direction in a cross section perpendicular to the rotation axis. In friction stir processing, the stir probe is caused to rotate in a rotation direction B in which the normal direction of the pressure receiving surface is positive. According to this kind of rotating tool, as it has no shoulder, a joint width does not increase even when a stirring region is deep, and also, a plastic flow in a rotation direction is generated by a pressure receiving surface, so that it is possible to reduce the proportion of the plastic flow in the rotation axis direction, and thus possible to suppress an occurrence of burr.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.