Rotary tool for friction stir spot welding and method of friction stir spot welding using the same
US7654435B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Sep 12, 2007 |
| Grant date | Feb 2, 2010 |
| Priority date | — |
| Expiry date | Feb 21, 2028 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23K20/1265
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A rotary tool for friction stir spot welding including: a rod-like probe to be inserted into one side of stacked planar portions of plural metal members to be joined while being rotated; and a cylindrical shoulder member which is disposed coaxially outwardly of the probe and which has a shoulder surface to be abutted against the one side of the stacked portions while being rotated, wherein the probe and the shoulder member are individual components and are disposed so as to have a double-acting structure which enable them to move independently in their axial direction, and in which a gap between an inner surface of the shoulder member and an outer surface of the probe is formed to have a small gap on a tip side of the rotary tool and to have an enlarged gap having larger clearance than the small gap on a base portion side thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.