Experimental and numerical modal analysis of a servo-screw press with coupled drives as a basis for increasing flexibility and dynamics

The development of electromechanical servo presses permits greater flexibility in process kinematics. When this feature is exploited in a targeted manner, the result of the forming process is largely determined by the dynamic properties of the forming machine. Here, attunement between control and mechanics is a central criterion for ensuring good motion dynamics, positioning accuracy and component quality. The increased motion dynamics during workpiece contact require a dynamic stability of the system technology in order to ensure process reliability. They affect the reactions of the machine structure as a result of the attendant process forces and inertial loads. The resulting oscillations affect the component quality and the operational strength of the machine. The effects of the slide guide, press mounting support, mass distribution and stiffness distribution are studied on the basis of a linearly elastic model of a servo-screw press and the results of an experimental modal analysis. The results of this study are intended to help shorten commissioning times and increase the productivity of servo-screw presses.