Laser beam welding apparatus and laser beam welding method
US10005153B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 17, 2015 |
| Grant date | Jun 26, 2018 |
| Priority date | — |
| Expiry date | Jul 3, 2035 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23K26/24
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
Provided is a laser beam welding apparatus capable of correctly detecting the beginning and the end of one welding point even in remote laser beam welding. The laser beam welding apparatus includes a head which irradiates a workpiece with a laser beam, an optical receiver which receives a reflected light of the laser beam from the workpiece, and a controller. The optical receiver receives only a laser beam and a plasma of the reflected light. The controller determines that one welding point begins when a time during which intensity of the reflected light is larger than or equal to a second set-intensity is longer than or equal to a first set-time, and determines that the one welding point ends when a time during which the intensity of the reflected light is smaller than or equal to a first set-intensity is longer than or equal to a second set-time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.