Verfahren zur Qualitätskontrolle eines Laserschweissprozesses, sowie ein dazugehöriges System und Programm

摘要

Described herein is a method and a system for controlling the quality of a laser-welding process, for example of laser welds of semifinished products constituted by elements of sheet metal of different thickness and/or properties ("tailored blanks") comprising the steps of:
detecting a radiation ( E ) produced in the welding area (2,3) and issuing signals ( E* ) indicating said radiation;
acquiring and processing said signals ( E* ) indicating said radiation;
making a division into blocks of said signals ( E* ) indicating said radiation;
calculating (205) for each block a block-mean value ( ¼ i ) and a value of block standard deviation ( Ã i ); and in supplying input values comprising block-mean values ( ¼ i ) and values of block standard deviation ( Ã i ) for identifying defects and/or porosities and insufficient penetration.