Abstract
Ceramic roller has been frequenntly used in furnace as a conveyor due to heat resistance and wear resistance. Roller consists of ceramic sleeve and steel shaft connected by shrink fitting. Shrink fitting ratio between sleeve and shaft is defined as ?/d, where ? is diameter difference and d is inner diameter of sleeve. Since thermal coefficient of steel is about four times larger than one of ceramic, stress and and contact separation between ceramic sleeve and steel shaft should be considered. Because larger fitting ratio can increase stress on the contact area and small fitting ratio causes coming out of the shaft. First, shrink fitting ratio and contact length are investigated. In this paper, four proposed models are considered, namley Model A, Model B, Model C, and Model D. Models are analized by using finite element model. As result, coming out incrases by decreases shrink fitting ratio. Moreover, Model D is the most suitable model for ceramic roller used in the furnace.
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