Joining method of dissimilar metal plates and dissimilar metal joined body
US8502105B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Oct 21, 2010 |
| Grant date | Aug 6, 2013 |
| Priority date | — |
| Expiry date | May 7, 2031 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/12347
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
The joining method includes a step of lapping the aluminum alloy plate and the plated steel plate via adhesive, a pre-heating step of clamping both metal plates lapped in the lapping step between a pair of electrodes for spot welding and applying pressure thereto, and applying a current between the pair of electrodes, a cooling step of pressurizing both metal plates at a pressing force higher than that at the start of the pre-heating step in a state where conduction between the electrodes is stopped, and continuing this pressurization over a predetermined cooling time, and a welding step of pressurizing both metal plates at a pressing force higher than that at the start of the pre-heating step, and welding both of the metal plates by applying a current higher than the conduction current value in the pre-heating step between the pair of electrodes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.