Welded portion inspection apparatus and inspection method thereof, with inspection in different zones of the molten pool
US9517533B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 28, 2014 |
| Grant date | Dec 13, 2016 |
| Priority date | — |
| Expiry date | Mar 28, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01B11/30
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A welding laser beam (L1) is radiated along welding loci (C11, C12) set in workpieces (W1, W2), or an inspection laser beam (L5) is radiated along scanning loci (C51, C52) set in a molten pool (Y1) of the workpieces that are molten by radiation of the welding laser beam, a returned light beam (L2) including reflection light from the molten pool, vapor light caused due to melting and evaporation of the workpieces, and thermal radiation light emitted from the molten pool is received, and a welding state of a welded portion of the workpieces is inspected based on an intensity of a returned light beam received in a first region inside the molten pool which is relatively close to a given point and an intensity of a returned light beam received in a second region inside the molten pool which is relatively spaced from the given point.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.