Dynamic setting of variable temperature and tensure profiles to avoid stress-induced cracks during laser micro welding of pressure glass feedthroughs (T08#)

• Subject Area: Joining and Separation Technology
• Term: since 2026
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 236616214

The production of special glass feedthroughs, such as those used as bolt, current or cable feedthroughs, plays a central role in applications that require a hermetically sealed, durable and electrically insulating connection. To avoid stress-induced cracks in the glass-to-metal feedthrough, the project will consider the temperature-time behaviour in the weld seam and in the component and the resulting stress states. Fast and locally selective modulation of the laser beam and multi-beam approaches allow different temperature fields and internal stress situations to be set along the weld seam, including quasi-simultaneous heating and cooling.

• DFG Programme: Collaborative Research Centres (Transfer Project)
• Subproject of: SFB 1120: Precision manufacturing by controlling melt dynamics and solidification in production processes
• Applicant Institution: Rheinisch-Westfälische Technische Hochschule Aachen
• Business and Industry: IL Metronic Sensortechnik GmbH
• Project Head: Professor Dr.-Ing. Arnold Gillner