Analysis and Investigation on Thermal Behaviours of Ball Bearing in High Speed Spindle
International Journal of Innovative Science and Modern Engineering (IJISME), 2 (4):
16-20 (March 2014)Abstract
High cutting speeds and feeds are essential requirements of a machine tool structure to accomplish its basic function which is to produce a work piece of the required geometric form with an acceptable surface finish at as high a rate of production as is economically possible. Since bearings in high speed spindle units are the main source of heat generation. Friction in bearings causes an increase of the temperature inside the bearing. If the heat produced cannot be adequately removed from the bearing, the temperature might exceed a certain limit, and as a result the bearing would fail. To analyse the heat flow in a bearing system, a typical ball bearing and its environment has been modelled and analysed using the finite element method. The maximum temperature in the bearing has been calculated as a function of heat generation with the rotational speed as a parameter. The goal of this analysis was to see how fast the temperature changes in the bearing system with respect to rotational speed. and if a given maximum temperature (e.g. maximum temperature of the lubricant or bearing metal) is reached. Steady state thermal-stress simulation is performed exclusively on bearing to investigate the temperature distribution, deformation and thermal stress occurred at various stages, further this work is a more detailed for conducting transient analysis.