Friction stir spot welding method and welded assembly utilizing same
US12391005B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 22, 2023 |
| Grant date | Aug 19, 2025 |
| Priority date | — |
| Expiry date | Jun 17, 2043 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29L2031/3076
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A first member formed of a thermoplastic resin molding mixed with a fiber material and a second member formed of a molding containing at least a thermoplastic resin are welded by friction stir spot welding using a double-acting tool for friction stir spot welding. An overlapping part between the first member and the second member is formed, and the tool is disposed against the overlapping part while the pin and the shoulder are rotated about the rotation axis. The pin is plunged into the overlapping part, and friction stir is performed to cause extension fibers to remain around a plunging region of the pin while the shoulder is retracted to release an overflow material. The shoulder is brought closer to the overlapping part to wrap the extension fibers into the overflow material when the overflow material is backfilled while the pin is retracted from the overlapping part.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.