Fuzzy Control of Edge Envelope Process For Screw Milling Cutter

In edge envelope process of milling cutter CAD/CAM, the grinding depth is variable which causes grinding force to change on a large scale and the error of edge envelope to increase. To improve form cutter accuracy, a closed-loop control system was designed to accomplish control of envelope process. For complicated dynamic process, fuzzy controller was used to adjust parameters online. By measuring grinding force, characteristic information of grinding process was acquired. Regulation factor of feed rate is determined by grinding force ratio, and force deviation and its change rate which are used as evaluation indexes. Thus, fuzzy control of constant force grinding process is accomplished. Simulation and cutter grinding test indicates that the system has high precision and stability, and reduces cutter error effectively.