The special session is on Weld Automation. The motivation for this is that welding is an important manufacturing technology that so far relies on extensive manual tuning. The only exception is spot welding in automotive industries, which is highly robotized. When it comes to low production volumes and high variability in objects to be joined there is a need for flexible solutions using automation knowledge. We propose a session that highlights the benefits of using modern automation tools for increased flexibility and higher quality in welded structures. The welding and automation research fields use different approaches to the problem and our belief is that both areas benefit from learning from each other. The solutions from the welding automation research will benefit from a joint session at CASE.