Method and apparatus for arc welding with melting electrode
US6388233B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 5, 1999 |
| Grant date | May 14, 2002 |
| Priority date | — |
| Expiry date | Nov 5, 2019 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23K9/092
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
The invention comprises a method and an arrangement for pulsed gas metal-arc welding with an electrode fed to the welding site continuously at a given rate, the fusion conditions being adapted in such a manner that the material transfer from the electrode (7) to the workpiece (8) takes place essentially without short-circuiting drops by the welding current being periodically increased to a pulse current of such size and duration that the current density in the electrode causes sufficient electromagnetic forces in order to separate one drop for each pulse, and where the arc length is stabilized by regulating the power supply for the arc by means of a regulator mainly on the basis of a measured arc voltage, characterized in that short-circuiting of the arc is detected as arc-voltage decreases and/or current increases, and in that the fusion power supplied is increased by the arc-length regulator being given an additional increase for each short-circuit detected.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.