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众所周知:轧制生产中每道次所能达到的最大压缩量与工作辊直径有关,且当轧辊直径一定时,压缩量只能在确定的范围内增加。 Ford和Aleksandr认为:轧件的极限厚度约等于工作辊直径的1/2000。但从经济合理性的观点考虑,显然,这个比值应增大到二倍以上。因此,轧制厚为0.005毫米的箔材时,工作辊直径须为5毫米。直径这样小的工作辊容易弯曲,因此应该有相应的能防止弯曲和不传动(不扭转)的支座。四辊轧机的缺点是工作辊在水平面的弯曲不能控制。
It is well known that the maximum amount of compression per pass achieved during rolling is related to the diameter of the work roll and that when the diameter of the roll is constant, the amount of compression can only be increased within a certain range. Ford and Aleksandr argue that the ultimate thickness of a rolling stock is about 1/2000 the diameter of a working roll. However, from the economic rationality point of view, it is clear that this ratio should be increased more than twice. Therefore, when rolling a foil with a thickness of 0.005 mm, the work roll diameter must be 5 mm. Work rolls with such a small diameter are easy to bend, so there should be corresponding supports that prevent bending and no transmission (no twisting). The disadvantage of a four-high mill is that the work rolls can not be controlled in the horizontal plane.