Method and apparatus for measuring weld penetration in an arc welding process
US4711986A · kind A · utility
27Cited by
10References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 24, 1986 |
| Grant date | Dec 8, 1987 |
| Priority date | — |
| Expiry date | Nov 24, 2006 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23K9/0956
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
The penetration in an arc welding process is measured in real time by monitoring the natural frequency of oscillation of the weld pool. Spatial oscillations are induced in the weld pool by modulating either the shielding gas or the welding current at a plurality of different frequencies, and the light reflected from the pool at a non-specular angle is sensed and processed to determine the natural frequency of oscillation. Both pulse and swept frequency modulations are employed for excitation of the weld pool.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.