In the case of the different lubrication method. the limiting cup-drawing coefficient of spcc & L4M is determined, and the lubrication mechanism with the polythene film is analysed.

• 测定了不同润滑方式下，SPCC和L4M板材的极限拉深系数，分析了采用了聚乙烯膜为润滑膜的润滑机理。