我厂拉延件的材料品种繁多,试用过多种润滑剂。通过实践,我们认为拉伸过程中较理想的润滑剂是猪油、滑石粉的混合物。猪油滑石粉润滑剂在使用时应现用现配,冬天为防止凝固应适当加温,使其保持稀糊状。使用时用刷子均匀地涂在与凹模接触的钢板一面,在首次拉伸之前,凹模也必须涂上一 I plant a wide variety of drawing materials, tried a variety of lubricants. Through practice, we believe that the preferred lubricant during stretching is a mixture of lard and talc. Lard talcum powder lubricant should be used now with the existing winter, in order to prevent freezing should be properly warmed to keep it thin paste. When used with a brush evenly coated on the side of the plate in contact with the die, before the first stretch, the die must also be coated with a