Inline process monitoring of hairpin welding

In this recent investigation, XARION´s Optical Microphone was used to capture airborne ultrasound generated during the hairpin welding process.

A multitude of welds were performed under varying quality-affecting parameter conditions, such as positioning misalignments or focal height and laser power deviations. It was found that the real-time ultrasound emission could be utilized as an early indicator for predicting the important quality criterium of final cross-sectional area of connection.

Inline Process Monitoring of Hairpin Welding Using Optical and Acoustic Quality Metrics