Abstract
Steel conveying rollers used in a heat treating furnace must have been changed very frequently because high temperate of a furnace induces the wear on the roller's surface ceramics coating in short period. This paper deals with a roller structure consisting of ceramics sleeve and two steel shafts connecting to the sleeve by shrink fitting because the ceramics has high temperature resistance and high corrosion resistance. It should be noted that in this structure only low shrink fitting ratio can be used because of the brittleness of the ceramics. However it has been reported that the shaft may come out from the sleeve during rotation because of the low shrink fitting ratio. In this study, therefore, two types of simulation are performed by FEM. One model assumes the applied load to the shaft varies along the circumferential direction of the shaft at the interval angle θ=30°, and the other model assumes at the interval angle θ=6°.
