一、现状丝杠和螺母在机械制造中通常均用以将回转运动转变为线性运动,此法虽然相当普遍,但不免存在许多缺点,诸如效率低、运转速度慢、在较差的环境条件下抗磨损性差以及丝杠和螺母之间存在间隙等。与此相反,滚珠丝杠却具有较高的效率、寿命长、轴向刚度高、无间隙、精度高及重复精度高等优点。在四十年代时发展相当缓慢,而近年来,特别在机床制造 First, the status quo Screws and nuts in machinery manufacturing are usually used to the rotary motion into linear motion, although this method is quite common, but inevitably there are many shortcomings, such as low efficiency, slow operating speed, in poor environmental conditions Poor wear resistance, and gaps between the lead screw and the nut. In contrast, the ball screw has a high efficiency, long life, high axial stiffness, no gaps, high precision and high repeat accuracy. In the forties, the development was rather slow, and in recent years, especially in machine tool manufacturing