| 摘要 |
A method and device for supervising the welding quality in a spot welding process, comprising equipment (9) for measuring the welding current or voltage during a welding time, a data storage (11) for storing measurements of the welding current or voltage, and a calculation unit (12) adapted to calculate the pulse length (l) for a plurality of weld pulses based on said measurements and, to determine the weld quality based on variations of the length of the weld pulses during the welding time.
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