An investigation on heat dissipation in high speed spindles by conduction and convection processes an integrated approach

Abstract

This thesis presents a computational fluid dynamics based approach to newlinestudy the heat removal and temperature distribution in the casing of the newlinehigh-speed motorized spindle. Presently, modern technology relies on the use newlineof high-speed motorized spindle to a great extent. It is a competent newlinetechnology for significantly increasing productivity and reducing production newlinecosts. On the other hand, high precision is essential to cope up with the newlineongoing trend of manufacturing activity, a striking example of which is found newlinein the electronics industry, automobile industry, and machine tool industry. newlineThe motorized spindles are equipped with a built-in motor for better newlineenergy transmission and balancing to achieve high speed and good quality newlineproducts. However, the built-in motor introduces a great amount of heat into newlinethe spindle system as well as additional mass to the spindle shaft, thus newlinecomplicating its thermo-mechanical behavior. As a result, the thermomechanical newlinebehavior of high-speed motorized spindles has become very newlinedifficult to predict for spindle designers and users. This unusual behavior newlineaffects the quality of the product in terms of surface finish and the production newlinecost. To control these effects in the products produced using high-speed newlinetechnology, the heat generated in the high-speed spindle system must be newlinedissipated efficiently. Thus it requires a precisely designed thermal newlinemanagement system for high-speed spindles newline newline