我厂生产排水泵,需用大量螺丝,如果用老办法车削,估计要用三台车床,生产一个季度还不能满足需要。形势所迫,我们不得不另想办法。经过领导、工人和技术人员三结合,研究试制成功一台不用长丝杆的半自动螺丝车床(如图1所示)。操作时,只有装卸工件、开车掀一次开合抱闸是手动的,其他如进退刀、拖板往复运动全是自动的。开车后掀下开合抱闸7(图2),由于螺旋凸轮5的作用,把大拖板和光杆 I plant drainage pumps, the need to use a large number of screws, if the old way of turning, it is estimated to use three lathes, the production of a quarter can not meet the needs. Forced by the situation, we have to find another way. After the leadership, workers and technicians combined three to study the successful trial of a semi-automatic screw machine without filament rod (Figure 1). Operation, only the loading and unloading of parts, driving a lift brake is a manual opening and closing, the other such as the advance and retreat knife, reciprocating carriage are all automatic. After driving under the opening and closing brake 7 (Figure 2), due to the role of the spiral cam 5, the big carriage and polished rod