What is force control in Friction Stir Welding, and why does it matter?

Force control refers to the ability of a welding machine to precisely regulate the amount of downward force applied by the tool during the welding process. In Friction Stir Welding, maintaining the correct force is critical for ensuring consistent material flow, proper tool engagement, and high-quality welds.

Accurate force control helps prevent common defects such as voids, tunnel defects, or surface irregularities. It also allows the system to adapt to changes in material thickness or hardness during the weld. Advanced FSW machines use feedback systems to monitor and adjust force in real time, supporting repeatable results in demanding manufacturing environments like aerospace, automotive, and research applications.