Potential and Challenges of Combined Roller and Plain Bearings for Servo Presses

Abstract

In order to provide higher accuracy and an increased life time for bearings in kinematic drives of servo-driven stroke controlled presses this article presents a combination of a roller and a plain bearing. With an example of the 3D-Servo-Press, the applied design is illustrated and the advantages are discussed. A technological solution is presented which enables a specific pretension for each individual bearing according to its tribological requirements. Using a developed matlab-programme the behaviour of a conventional plain bearing is opposed to the new bearing combination by its illustrated displacement paths of the shaft in the bearing shell under certain conditions of a common balancer system. The feasibility of this initial tension system is shown by means of a bearing prototype. Finally measurement results of a prototype will be shown which proof the manufacturability of the presented bearing combination.

Methods and Technologies for Mastering Uncertainty

“…The combination of the three bearings creates a statically over-determined system, which makes a robust design necessary for industrial use. After the basic feasibility of combined roller and plain bearing arrangements was demonstrated in [240], we developed a design methodology that takes into account the distribution of the operating force F op between the roller bearing force F rb and the plain bearing force F pb as a function of the operating conditions.…”