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发明授权
CN101730607B 用于在激光焊接过程期间识别焊缝上的缺陷的方法 有权

用于在激光焊接过程期间识别焊缝上的缺陷的方法
摘要：
本发明涉及一种用于在激光焊接过程期间识别焊缝(4)上的缺陷、尤其是镀锌的板的搭接接头上的结合缺陷和/或焊透缺陷的方法，该方法包括下述步骤：在两维上空间分辨地探测由与液态熔池(1)相连的凝固熔体(3)发射的辐射，通过对沿着该凝固熔体(3)的至少一个型廓截面(10，11)的所探测到的辐射进行分析处理来确定用于该凝固熔体(3)中的热量导出的至少一个特征值，通过将所述至少一个特征值与至少一个参考值相比较来识别该焊缝(4)上的缺陷。
摘要（英）：

A method for detecting defect in a weld seam during laser welding. The method includes performing a two-dimensionally locally resolved detection of radiation that is emitted by a solidified molten mass that is adjacent to a liquid melting bath. The method also includes determining at least one characteristic value for heat dissipation in the solidified molten mass by evaluating the detected radiation along at least one profile-section of the solidified molten mass, and detecting a defect in the weld seam by comparing the at least one characteristic value with at least one reference value.

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