Control System Design for a Semi-Finished Product Considering Over- and Underbending

Abstract

In the last decades, the application of automatic control techniques in freeform bending processes was limited to the motion control of the bending die, i.e., the workpiece itself was not considered inside the closed-loop control system. In a previous work, a simple preliminary model for the workpiece was used as a foundation for developing a closed-loop system for freeform bending that includes both the geometry and the mechanical properties of the semi-finished product. However, this approach did not consider the fact that the same geometry can be reached by either over- or underbending the tube. In this work, the previously developed system model is extended to include this physical property of the system.

Authors 6

1. Ahmed Ismail corresponding

   Technical University of Munich

   Affiliation as printed

   Chair of Automatic Control, Technical University of Munich, Boltzmann Str. 15, 85748 Garching, Germany

2. Daniel Maier

   Technical University of Munich

   Affiliation as printed

   Chair of Metal Forming and Casting, Technical University of Munich, Walther-Meißner-Str. 4, 85748 Garching, Germany

3. Sophie Stebner Aachen Integrity of Materials and Structures

   RWTH Aachen University

   Affiliation as printed

   Integrity of Materials and Structures, RWTH Aachen University, Intzestr. 1, 52072 Aachen, Germany

4. Wolfram Volk

   Technical University of Munich

   Affiliation as printed

   Chair of Metal Forming and Casting, Technical University of Munich, Walther-Meißner-Str. 4, 85748 Garching, Germany

5. Sebastian Münstermann Aachen Integrity of Materials and Structures

   RWTH Aachen University

   Affiliation as printed

   Integrity of Materials and Structures, RWTH Aachen University, Intzestr. 1, 52072 Aachen, Germany

6. Boris Lohmann

   Technical University of Munich

   Affiliation as printed

   Chair of Automatic Control, Technical University of Munich, Boltzmann Str. 15, 85748 Garching, Germany