Technique for predicting joining defects during laser welding

Abstract

The invention relates to a method for laser welding bipolar plates (10), the method comprising the steps of: laser welding two at least partly overlapping joining partners (12, 14) along a specified welding path in order to produce an overlapping connection between the joining partners (12, 14); observing, during the welding process, whether, following the process zone (22), at least one undulating structure (242) forms in the weld pool (24); initiating, in response to the observation, a measure for preventing or bypassing using an incomplete join (152) between the joining partners (12, 14) along at least one portion of the welding path. The invention also relates to a laser welding system and to a computer program product for implementing the method.

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