NEW METHODOLOGY CALCULATIONS OF RADIAL STIFFNESS NODAL POINTS SPINDLE MACHINE TOOL

Spindle - bearings system of the machine tools play a major role in the fulfilling the required working accuracy and productivity. The number of spindles supported on angular contact ball bearings is increasing proportionally with increasing demands on the machine tool quality. It is caused by the fact that these spindle bearings in various combinations can to reach sufficient radial and axial stiffness and revolving frequency of the spindle-bearing system. The complex analysis stiffness of nodal points is difficult and complicate. In this paper is introduced as well simplified mathematical apparatus for evaluation of radial stiffness bearing knot. [PUBLICATION ABSTRACT]