Burnishing of prismatic workpieces on three-axis machine enabled by closed loop force control

Burnishing is an effective chipless finishing process for improving workpiece properties: hardness, vibration resistance and surface quality. The product quality and process stability are significantly influenced by factors such as tool movement and burnishing force. The implementation of a force controlled tool positioning enables integration of finish operations like burnishing into conventional machining centers. This paper shows the realization of this new machine and process technology. The controller structure and tuning are discussed. In addition, the effects on the process forces and the workpiece are examined.