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凡在未进行轧制时,预先承受力的轧机,广义上均可称为预应力轧机。它早已得到广泛的应用。其效能之一,是可提高轧机机座的刚性系数,从而提高轧材精度。但在其实际应用及一些专业论述中,认为预应力轧机存在着很大的局限性,甚至对它存在着争议。本文认为预应力轧机的效能是多方面的,单就提高轧机机座刚性系数来说,其潜力远远没有得到充分发挥。下面谈谈预应力轧机可提高刚度系数的原理。 1.两种弹性变形间存在协调的变形边界对轧机机座的若干受力构件,预先施力,在预应力范围内,形成静不定系统。在进入轧制工作状态后,轧制力使系统内产生
Where no rolling, the pre-force rolling mill, broadly speaking, can be called pre-stress rolling mill. It has long been widely used. One of its effectiveness is to increase the rigidity of the rolling mill base, thereby improving the accuracy of the rolling material. However, in its practical application and some professional expositions, it is considered that the prestressing mill has great limitations and even has its dispute. In this paper, the performance of prestressing mills is considered in many aspects. For the sake of improving the stiffness coefficient of rolling mills, the potential of the prestressing mills is far from fully exerted. Here to talk about prestressing mill can increase the stiffness coefficient of the principle. 1. There is a coordinated deformation boundary between two kinds of elastic deformation Some force components of the rolling mill stand are pre-stressed and form a static indefinite system within the pre-stress range. After entering the rolling state of work, the rolling force generated within the system