To study the conditions on the formation of the Hydrodynamic lubrication on the process of the Hydrostatic extrusion,and To derive the computational formula on lubrication film thickness.

• 研究静液挤压过程流体动力润滑状态形成的条件，推导静液挤压过程工件与模具表面间润滑油膜厚度的计算公式。