Identification of Geometric Errors of Rotary Axes in Machine Tools

Abstract

Due to the ever-increasing requirements on higher productivity of machines with simultaneous preservation, or even increase, of their working accuracy, considerable attention is paid to functional nodes of machines, such as linear and rotary axes. This paper describes a new concept of a universal measuring stand, developed to fulfil the requirements on monitoring of the headstock geometric properties in relation to the changing loading conditions. Equally important is the thermal stability, which can markedly affect the accuracy of the future workpiece. The problem of thermal stability of machine tools and their components is a continuously studied topic, especially the possibilities how to minimize these influences either by constructional changes or by a suitable compensation method.

For this reason, a methodology of measurement and evaluation of geometric errors of rotary axes has been proposed and, with regard to a long-term character of measurement of the heat transfer between the machine components, a universal measuring SW module has been developed.