Thermal Behaviour of Machine Tool Spindle

The thermomechanical deformation of machine tools, caused by external and internal heat sources, is one of the main contributors to the overall geometric error of the workpiece. In order to reduce the errors on machine tools which are caused by thermal deformation, it is important to understand the influencing factors. The Machine tool spindles are the most predominant part which is getting affected more by external and internal heat sources. This document describes the method for efficient quantitative estimation of the thermal characteristics of the spindle unit in accordance with ISO 230–3 standard. The method of measurement, and measurement conditions and applicable standards reference to relevant Standards are presented for the benefit of the manufacturers and user of machine tools. The tests described in this document are not mandatory, and to be considered for machine acceptance, if agreed between buyer and seller.