六十年代精密机床设计时,常按照运动学设计原理,六点定位,避免静不稳定,减少干涉影响的原则进行。轴系设计中,如民主德国OFD厂0.2″圆刻线机,采用了顶尖A和短圆柱B支承方式(图1),达到了五个自由度约束,一个自由度回转的定位原则。移动导轨设计中,如瑞士SIP公司2P坐标镗床,采用了V形导轨二点支承、平导轨一点支承的方式(图2),达到了五个自由度 Sixty time precision machine tool design, often in accordance with the kinematics design principles, six-point positioning, to avoid static instability and reduce the interference of principles. Shaft design, such as the Democratic Germany OFD 0.2 "circular engraving machine, using the top A and short cylindrical B support (Figure 1), reached the five degrees of freedom constraints, a DOF rotary positioning principle. Design, such as the Swiss SIP company 2P coordinate boring machine, using a V-shaped guide rail two-point support, flat rail little way to support (Figure 2), reached five degrees of freedom