Process for achieving proper weld quality in course of the welding operation, marking the faults on the workpieces and certifying the quality
US4605836A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 21, 1984 |
| Grant date | Aug 12, 1986 |
| Priority date | — |
| Expiry date | Sep 21, 2004 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23K31/125
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A process for maintaining weld quality during welding operation, marking the fault spots on the workpiece and certifying of quality, in the course of which instantaneous values of arc current and arc voltage characterizing manual or mechanized welding process are continuously measured and from the values thus obtained relative short-circuit time of the arc, drop frequency and arc outputs are continuously calculated. The measured and calculated values are compared with empirically determined optimal values, thus defining absolute values and signals representing the directions of deviations, as well as duration of deviations, are compared on a predetermined span of time and averages of absolute values and signals representing the directions are defined. Averages and quotients are recorded and simultaneously averages of the absolute values are compared with a first and second limit value and in case, if they fall between the first and second limit value, a warning signal is given for the welder, and if averages are exceeding the second limit value, a further signal is given and simultaneously a fault spot is marked on the workpiece until the averages are reduced below the second limit…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.