Process and apparatus for spot welding with a laser beam
US8304687B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 7, 2004 |
| Grant date | Nov 6, 2012 |
| Priority date | — |
| Expiry date | Nov 20, 2029 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23K26/60
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
The invention relates to a laser spot welding process for executing a spot weld in two successive steps, namely a first step of preparing the surface state of the material to be welded and a second step of welding as such. The luminous energy (BR) reflected by the weld region of the material is measured in real time during the first step and then processed by a controller circuit (37) connected to a control circuit (30) of the laser source (31). In this way, the characteristics (LM) of the laser beam are adjusted in real time as a function of the measurements effected to allow effective control of the quality of the weld obtained, and in particular of its dimensions.The invention also relates to a welding device for implementing this process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.