This paper presents the current results of cooperation focused on automatic billet straightening machine development. First, an experimental study of three-point bending realized on small specimens is presented to explain the basic ideas of the straightening. Then, the main regimes of straightening and the algorithm itself are described together. Subsequent finite element simulations of operational experiments show the applicability of the developed theory. The significance of material parameters estimation is depicted in this work. At least four parameters have to be properly determined for a new material in the straightening process.

Department of Applied Mechanics Faculty of Mechanical Engineering VŠB Technical University of Ostrava 17 listopadu 2172 15 70800 Ostrava Czech Republic

Department of Control Systems and Instrumentation Faculty of Mechanical Engineering VŠB Technical University of Ostrava 17 listopadu 2172 15 70800 Ostrava Czech Republic

ELCOM a s Lomnického 1705 9 14000 Praha 4 Nusle Czech Republic

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