Control Of Noncircular Turing Tool Holder Driving

Noncircular contour parts are applied in many fields such as automotive (e.g. wheels, camshaft), biomedical (artificial bones), aerospace and other manufacturing industries. Due to the special contour type, traditionally, the noncircular parts are manufacturing by milling, subsequently grinding and other non-traditional machining, resulting high costs of tooling and long set-up time. With the development of manufacturing technology, the noncircular turning process has emerged as a successful alternative to the manufacturing operations mentioned above.An integrated noncircular turning process system is proposed in the thesis. The whole system includes four modules: industrial computer and its hardware module, signal detecting module, tool holder actuator module and control software module. The key parts of each module (e.g. industrial computer, position sensor, A/D card, D/A card) are analyzed, designed and selected in detail in the thesis. A new type tool holder based on electromagnetic driven is designed and its corresponded accessories are also designed and selected carefully.Several Control strategies and the feasibilities are discussed in this paper, such as PID control, adaptive control and adaptive sliding control. A software named MATLAB is utilized to the tool holder as the simulink and control software. The simulation results are proved that PID controller, adaptive controller, and adaptive sliding controller are effective to the motion control of the tool holder.