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    Analytical approach for calculating the sheet output curvature in asymmetrical rolling: In the case of roll axis displacement as a new asymmetry factor

    , Article International Journal of Mechanical Sciences ; Volume 105 , 2016 , Pages 11-22 ; 00207403 (ISSN) Aboutorabi, A ; Assempour, A ; Afrasiab, H ; Sharif University of Technology
    Elsevier Ltd  2016
    In this paper, a less studied factor in the asymmetrical rolling process of sheets, namely the rolls horizontal displacement, is investigated using an analytical approach based on the slab method analysis. The presented method is capable of computing the force and torque of the process under different asymmetrical factors such as the rolls horizontal displacement, the interface friction inequality, and the rolls speed mismatch. A formula is presented to predict the outgoing sheet curvature induced by the rolls horizontal displacement. The results can be potentially used in producing curved sheets of various shapes by the asymmetrical rolling process. The analytical model is compared with a... 

    Statistical tolerance analysis of flexible assemblies with contact effects

    , Article SAE 2016 World Congress and Exhibition, 12 April 2016 through 14 April 2016 ; Volume 2016-April, Issue April , 2016 Khodaygan, S ; Ghasemali, A ; Afrasiab, H ; Sharif University of Technology
    SAE International 
    One of the most important characteristics of industrial products, especially mechanical set-ups, is considering the tolerances of production and assembly of these set-ups, which directly influences the products' operations. In sheet metal structures, due to the high flexibility of the sheets, the errors appeared while assembly will be as highly influential as the errors due to the production tolerance of the sheets. As a result, having a comprehensive model which could analyze the assembly process of these structures and also clarifies the relation between the tolerance of the parts and the ultimate changes of the set-up will be of considerable importance. During the assembly process, the...