Generation Mechanism of Driving Out Force of the Shaft from the Shrink Fitted Ceramic Roll by Introducing Newly Designed Stopper

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  • Zhang Guowei
    Dept. of Mechanical and Control Engineering, Kyushu Institute of Technology
  • Sakai Hiromasa
    Dept. of Mechanical and Control Engineering, Kyushu Institute of Technology
  • Noda Nao-Aki
    Dept. of Mechanical and Control Engineering, Kyushu Institute of Technology
  • Sano Yoshikazu
    Dept. of Mechanical and Control Engineering, Kyushu Institute of Technology
  • Oshiro Shun
    Dept. of Mechanical and Control Engineering, Kyushu Institute of Technology

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<p>Ceramic roller can be used in the heating furnace conveniently because of its high temperature resistance. The roller consists of ceramic sleeve and steel shaft connected only under a small shrink fitting ratio because of the brittleness. However, the coming out of the shaft sometimes happens from the ceramic sleeve under repeated loading. Therefore, it is important to find out the driving out force to prevent the coming out failure. Based on the previous studies, a two-dimensional shrink fitted structure is considered by replacing the shaft with the inner plate and by replacing the sleeve with the outer plate. Then, the driving out force is focused in this study by introducing a newly designed stopper on the outer plate. The finite element simulation shows that the coming out phenomenon can be prevented due to the stopper installed on the outer plate. Then the mechanism of driving out force generation is clarified. Finally, the process of coming out is explained in terms of the residual displacement.</p>

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