Process Monitoring at Laser Welding of Thermoplastics

Abstract

A pyrometer, integrated into a 3D‐scanner, offers the possibility to measure the weld seam temperature at quasi‐simultaneous laser transmission welding. Experimental studies have shown that gaps located in the joining zone can be identified by a temperature rise even at a high scanning velocity. This enables the implementation of algorithms for observation and control strategies.

OCT for Process Monitoring of Laser Transmission Welding

“…Devices using sensitive parts demand a joining technique which does not affect the inner components. The welding process itself faces therefore higher requirements concerning, for example tightness of the weld seam, cleanliness of the produced part (no material must impurify the part during the process) or resistance towards any applied pressure [1,2,3].…”