我厂机械加工采用流水线作业,其中有一种零件,侧面有两个距离为80mm的M8螺孔,我们采用了自己设计的皮带传动差动进给双头钻孔动力头,结构简单、紧凑,成本低,已使用了15年,加工件有十万次之多,介绍如下,供参考。图中所示,小皮带轮3和4都装在套6上,套6与电机轴、小皮带轮3各用键联接。当电机沿N向转动时,滚柱2在弹簧1的作用下向间隙小的方向移动。由于滚柱与内、外壁的摩擦力作用下,电机轴通 I plant machining using pipeline operations, of which there is a part, there are two sides of the M8 screw 80mm distance, we have adopted their own design of the belt drive differential feed double-headed drilling head, the structure is simple, compact, cost Low, has been used for 15 years, the processing of parts as many as 100,000 times, introduced below, for reference. As shown in the figure, the small pulleys 3 and 4 are mounted on the sleeve 6, the sleeve 6 and the motor shaft, the small pulley 3 are keyed. When the motor rotates in the N direction, the roller 2 is moved by the spring 1 in the direction of small clearance. As the roller and the friction between the outer wall, the motor shaft through