Weld fill height regulating system for arc welding apparatus
US4005308A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 23, 1974 |
| Grant date | Jan 25, 1977 |
| Priority date | — |
| Expiry date | Dec 23, 1994 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23K9/0732
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
Means are provided for maintaining a uniform height of deposited weld material in an electrical arc welding apparatus of the kind having a welding head driven by a travel motor along a juncture between two workpieces which are to be joined. A first signal, indicating departure from a desired fill depth, is produced by sensing variation of the welding current from a predetermined normal magnitude. The first signal is applied to summing junction together with a predetermined selectable reference signal of opposite polarity so that the two signals cancel out as long as the desired weld fill height is being maintained. Upon a departure from the desired weld fill height an output signal from the summing junction activates a servomotor which adjusts the speed of the travel motor as necessary to maintain the uniform weld depth. Means are further provided for assuring continuance of the welding head movement in the event that the melt should be lost because of proximity to an edge of the workpiece or because of an opening therein.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.