Productivity rate of machine tools depending on the change of machining modes

Abstract

Calculation of the productivity rate and optimization of the machining modes for machine tools today is complex, and in many cases an unresolved problem. Known equations for calculating the real productivity rate of machine tools and machining cost with changes in the machining modes consider only the change in the machining time and time losses owing to metal-cutting tool life change. These equations do not reflect the changes in productivity rate due to change of reliability of machine tool mechanisms with changes in the machining mode. This case study presents a new analytical dependency of the productivity rate for machine tools that includes changes in the reliability of the main mechanisms and components of the machine tools with changes in machining modes. A practical application of a new equation for the productivity rate for a machine tool with changes in the machining mode is presented.