铰－挤复合刀具的研制安徽工学院袁人炜，周仁淦，周学强柴油机挺柱孔的作用是保证挺柱孔和推杆把凸轮的运动传到气门机构。挺柱在挺柱孔内一面作上下往复运动，其周期为百分之几秒甚至千分之几秒；另一方面为保证其导向面磨损均匀，还应在挺柱孔内作缓慢的移动。因此，要... Reaming - squeeze compound tool development Anhui Institute of Technology Yuanren Wei, Zhou Rengan, Zhou Xueqiang diesel engine tappet hole role is to ensure that the tappet hole and the push rod to cam movement to the valve train. Tappet in the side of the tappet hole side up and down reciprocating motion, the cycle is a few seconds or even a few thousandths of a second; the other hand, to ensure that the guide surface wear uniform, but also in the tappet hole for slow movement . So, want ...