Print Email Facebook Twitter Thermomechanical modelling of a hydrostatic machine tool spindle Title Thermomechanical modelling of a hydrostatic machine tool spindle Author de Wolf, B.P. Contributor van Ostayen, R.A.J. (mentor) Faculty Mechanical, Maritime and Materials Engineering Department Precision and Microsystems Engineering (PME) Date 2016-08-11 Abstract Development of high precision machine tools enables the industry to continuously tighten tolerances and surface finish quality demands. Controlling the thermal state of the machine and process has become the dominant challenge for machine tool manufacturers. Defining models that predict the thermally induced deformations is an important aspect of this development. This research project focussed on development of a thermomechanical model of a hydrostatic machine tool spindle. Analytical calculations are performed to describe the viscous dissipation in the bearing fluid, losses in the integrated electric motor, the motor coolant circuit and ambient conditions. The resulting parameters and equations are supplied to a finite element model of the spindle assembly. An important characteristic of the model is a fully parametric set-up to enable easy investigation of design variations. A new modelling method is proposed to address the demand for a parametric finite element model of this complexity. This involves a generalised definitions structure that allows the user to rebuild a model with a single function call. The approach helps eliminate artefacts and provides a platform to store corresponding definitions and simulation results. Validation of the theoretical model is performed with two series of thermal error measurements on industrial machine tool spindles. The design of the spindles is modified to incorporate internal temperature sensors which provide important insight in the thermal state of the spindle assembly. Comparison of the simulated and experimental results shows that the model is a promising tool for evaluation of the transient thermal behaviour. Subject machine tool spindlethermal errorfinite element modellingexperimental validation To reference this document use: http://resolver.tudelft.nl/uuid:6e5029b2-6ae4-40e1-9509-01ca18057b2b Part of collection Student theses Document type master thesis Rights (c) 2016 de Wolf, B.P. Files PDF ME2490_Thesis_public.pdf 9.23 MB Close viewer /islandora/object/uuid:6e5029b2-6ae4-40e1-9509-01ca18057b2b/datastream/OBJ/view