Method of gas metal arc welding
US6013896A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 20, 1998 |
| Grant date | Jan 11, 2000 |
| Priority date | — |
| Expiry date | Mar 20, 2018 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23K9/092
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
An improved method of gas metal arc welding (GMAW) utilizing relatively low current levels. The method includes providing a variable current to form and detach a droplet from a consumable wire electrode. During the welding process, the current is sufficient to produce a droplet at the end of a consumable electrode wire, but not to independently detach the droplet. After the droplet reaches a desired diameter, the current is lowered to induce an oscillation in the droplet. At a selected oscillation of the droplet, the current is increased. The combination of the momentum created by the oscillation of the droplet and the electromagnetic force caused by the increased current serves to detach the droplet from the electrode wire.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.