菜单
  

    window with a small clearance D typically of about 1 mm. Three input external
    generalized forces (P—the rolling load, Fh—the horizontal force, and M—the rotating
    torque) are acting on the roll system. In its corresponding skeletal structure
    representation, numbers one, two, and three represent the lower BR, housing column,
    and chock, respectively. The skeletal structure of the WR system is identical to that of
    the BR system.
    Based on the work presented above, the following conclusions can be drawn:(1)
    Contemporary plate rolling mills are not statically determinate (unstable) because the side clearances of the roll system are not controlled effectively and the negative
    effects of microbending deflections of the rolls on the performance of radial roller
    bearing are not considered. (2) It is impossible to maintain the rolls parallel by offset
    distance alone in four- or six-high plate rolling mills with clearances in the roll system.
    On the contrary, the offset distance results in asymmetric cross and deviations in the
    rolling load. Therefore, the offset distance should be eliminated.(3) A new transfer
    mode of the rolling load is one of the methods for improving the performance of
    rolling mills.
    The authors gratefully acknowledge the support of the Science & Technology
    Committee of the Tianjin government (Grant No.09ZCKFGX02800), the Doctoral
    fund of the Ministry of Education of China (Grant No. 20111333110001), the
    National Science and Technology Support Program (Grant No. 2011BAF15B01),
    and the reviews and precious advice of Professor Kornel F.Ehmann from
    Northwestern University as well.
    References
    [1] Japan Society for Plasticity Technology, 2006, Handbook of Plasticity Technol-
    ogy, Corona Publishing, Tokyo.
    [2] Korolev,    A.    A.,    1965,    Mechanical    Equipment, Rolling Mills,   
    Metallurgical Press, New York.
    [3] Zou, J. X., and Shi, C. D., 1993, Mechanical Theory and Structure Design of
    Rolling Machines, Metallurgical Industry Press, Beijing.
    [4] Fan, X. B., Zang, Y., and Wang, H. G., 2010, “Research on Hot Rolling Mill
    Horizontal Vibration,” Iron Steel, 45(9), pp. 62–66.
    [5] Yang, Q. J., Lian, J. C., and Duan, Z. Y., 1996, “Study on Dampers of 4-High
    Cold Rolling Mill,” Iron Steel, 31(11), pp. 71–75.
    [6] Zou, J. X., 1999, Metallurgy Mechanical Behavior, Science Press, Beijing.
    [7] Shen, G. X., Shu, X. D., and Li, M., 2005, Theory and Practice of Micro
    Dimensional Behavior on Rolling Mill, Science Press, Beijing.
    [8] Cao, W. Q., and Xu, Z. Y., 2005, Mechanical    Design, Mechanical Industry
    Press, Beijing.
    [9] Department of Theoretical Mechanics    of Harbin Industry University, 2005,
    Theoretical Mechanics II, 6th ed., Higher Education Press, Beijing.
    [10] Wang, F. H., 1998, “Analyzing the Axial Force of Roller Mill Working Roller
    Using Finite Element Method,” J. Coll. Anshan Iron Steel, 2, pp. 25–28.
    [11] Li, M., Chen, Y. Q., and Sun, X. D., 2003, “Developing a Micro Dimensional
    Controllable    Roll    System    of    Mill,”    J.    Light    Alloy    Fabr. Technol., 4,   
    pp.21–24.
    [12] Kuroda, S., 2006, “Developed Pair Cross (PC) Mill,” Ind. Machinery, 8, pp.
    43–46.
    [13] Shen, G. X., Li, M., Shi, R., and Yangimoto, J., 2010, “Indeterminacy of the
    Offset Mechanism and Microscale Static Determinacy of Roll System in Four- High
    Mill,” J. Mech. Eng., 46(10), pp. 69–74.
    [14] Shen, G. X., and Li, M., 2009, “Statically Determinate Characteristics of
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