70年代初生产的Mll5W万能磨床，在原设计中砂轮架没有快速进退装置，进退完全靠手摇丝杆完成，操作十分不;;l;。;。便且劳动强度大，为此我们一11——一门、。对该机床进退装置进行了图l改装前、后砂轮改进。其运动方式和结构的运动方式见图1、2。由图2.可知，将原机床丝杆与砂 The early 1970s Mll5W universal grinder, wheel racks in the original design is not rapid advance and retreat devices, advance and retreat by hand crank complete, the operation is not ;; l ;. ; And we have a great labor, and for this we shall have one to one door. The machine forward and retreat device was modified Figure l before and after the wheel improved. Its movement and structure of the movement in Figure 1,2. As can be seen from Figure 2, the original machine screw and sand