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一、引言对于金属材料拉拔与挤压时的流体动力润滑问题,近年来国外学者做了一些工作。一般都以板形条料或圆形杆件为主。可是,对于薄壳的拉拔与/或挤压时的动力润滑问题至今还很少涉及。本文企图将等厚度圆柱薄壳通过
I. INTRODUCTION For the hydrodynamic lubrication of metal materials during drawing and extrusion, foreign scholars have done some work in recent years. Generally shaped bar or round bar-based materials. However, little is known about the problem of power lubrication when drawing and / or pressing a thin shell. This article attempts to pass an equal thickness cylindrical shell