A Control Strategy for Intelligent Stamp Forming Tooling

Abstract

This paper describes the development and implementation of closed-loop control for oval stamp forming tooling using MATLAB ® ’s SIMULINK ® and the d SPACE® CONTROLDESK ® . A traditional PID controller was used for the blank holder pressure and an advanced controller utilizing fuzzy logic combining a linear quadratic gauss controller and a bang–bang controller was used to control draw bead position. The draw beads were used to control local forces near the draw beads. The blank holder pressures were used to control both wrinkling and local forces during forming. It was shown that a complex, advanced controller could be modeled using MATLAB ’s SIMULINK and implemented in DSPACE CONTROLDESK . The resulting control systems for blank holder pressures and draw beads were used to control simultaneously local punch forces and wrinkling during the forming operation thereby resulting in a complex control strategy that could be used to improve the robustness of the stamp forming processes.