| 摘要 |
<p>Process for maintaining weld quality marking the fault spots (25) on the workpiece, in course of which momentary values of arc current and arc voltage (1, 2) are continuously measured and from the values, drop frequency and arc outputs (4, 6) are continuously calculated. The measured and calculated values are compared with empirically determined optimal values (8). The averages of absolute values and signals representing the directions are defined (9), furtheron the quotient of the duration of deviations and predetermined duration is formed. If averages and quotients fall between a first and a second limit value (11), a warning signal is given for the welder (23), whereas, if averages are surpassing the second limit simultaneously the fault spot is marked on the workpiece (25). </p> |
