Arc sensing method in automated welding
US5780808A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 28, 1997 |
| Grant date | Jul 14, 1998 |
| Priority date | — |
| Expiry date | Feb 28, 2017 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23K9/1276
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
An arc sensing method in an automated welding process for accurately adjusting a position of a weaving center of a welding torch with respect to a welding center line on the basis of a change in an arc current according to the change in distance between a lower end of the welding torch and a welding surface during weaving of the welding torch, is disclosed. The arc sensing method is accomplished by detecting the position of the weaving center of the welding torch with respect to the welding center line using the differential value of the arc current. Therefore, the position of the weaving center of the welding torch is accurately determined regardless of the degree of inclination of welding surfaces or the position of the base metals with respect to the welding torch. Accordingly, welding in a state in which the welding torch is off-center from the welding center line can be prevented.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.