前言: 无級变速是現代机床等拖动的发展方向。采用无級变速拖动后,能使机床发揮最大的生产率,使用最合理的切削用量,井能使传动平稳,从而提高了机床的加工精度。其中机械式的虽因效率、磨損等情况不够理想,但因制造使用上具有現实意义,所以各国对这方面都进行了一些研究,如苏联1620車床就是采用了反球面式无級变速器传动的,其精度极高。近年来我国在这方面也开始了研究工作。因为現成的資料缺乏,所以要由我們自己来 Foreword: CVT is the development direction of modern machine tools such as dragging. With variable speed drag, the machine can maximize productivity, use the most reasonable amount of cutting, well can make the transmission stable, thus improving the machining accuracy. The mechanical type is not ideal because of its efficiency, wear and tear, but it is of practical significance due to its manufacture and use. Therefore, various countries have done some research in this respect. For example, the Soviet Union 1620 lathe is driven by the anti-spherical CVT , Its accuracy is very high. In recent years, our country has also started research work in this area. Because of the lack of available information, it is up to us