立铣床的工作台面,是由固定螺母靠长螺杆来带动进退的,使用一定时间后,螺母会磨损,而使螺母与螺杆之间产生较大的空隙。因此,工作台在加工时就会发生滑动现象,使工件突然随着工作台向前滑动,铣刀和工件突然碰击,往往会使立铣刀断裂。这是由于螺母和螺杆单侧吻合的缘故。我厂王忠道同志根据这个毛病,改进采用调节螺母,使螺杆和 The working table of the vertical milling machine is driven by a fixed nut by a long screw to advance and retreat. After a certain period of use, the nut will be worn, leaving a large gap between the nut and the screw. Therefore, the workbench slips during machining, so that the workpiece suddenly slides forward with the workbench, and the sudden impact of the milling cutter and the work piece often breaks the end mill. This is due to unilateral nut and screw match reason. According to this defect, Comrade Wang Zhongdao of our factory improved the use of adjusting nut to make the screw and