前言机床主轴箱有级变速传动设计的首要任务是拟定转速图、将总传动比合理地分配到各变速组中去。由于影响转速图的因素较多,加之又缺乏手段,通常都靠反复比较、摸索,找一个方案往往得花费很多时间,所得的方案未必理想。现就四轴18速转速图1为例说明(图1)。 Preface The first task of the variable speed drive of the machine tool spindle headstock is to formulate the rotation speed map and distribute the total transmission rationally to each speed change group rationally. As more factors affect the speed map, coupled with the lack of means, usually by repeated comparison, exploration, find a program often have to spend a lot of time, the resulting program may not be ideal. Now four-axis 18-speed rotation speed of Figure 1 as an example (Figure 1).