Friction stir welding apparatus and method
US6299050A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 24, 2000 |
| Grant date | Oct 9, 2001 |
| Priority date | — |
| Expiry date | Feb 24, 2020 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23K20/1245
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
The invention intends to reduce a frequency at which defects occur in a welding region during friction stir welding, and to improve the reliability of the welding region. The invention resides in a friction stir welding apparatus wherein a distance to the surfaces of the workpieces is detected by a detector, a change of the detected distance is found by a signal processing device, and a tool is rotated by a rotation driving device in a state where a vertical driving device is controlled by a control device so as to suppress the found change, whereby a plastic fluidity of the workpieces is caused to accomplish joining of the workpieces.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.