电磁离合器在我国自行设计的机床中应用已有近２０年的历史，在实践中我们已经积累了丰富的经验。为了交流这方面的经验，继本刊１９７５年第三期发表的有关离合器的一组文章后，本期就合理选择离合器的类型、规格，离合器在机床传动中的正确布局，合理选择离合器的控制线路，提高离合器使用性能等，又组织了一组文章，发表于下，供读者参考。 Electromagnetic clutch in China’s own design of machine tools in the application of nearly 20 years of history, in practice, we have accumulated rich experience. In order to exchange experience in this area, following the publication of a series of articles on clutches published in the third issue of 1975, the current issue is to rationally choose the type and specification of the clutches, the correct layout of the clutches in the transmission of the machine tool, and select the clutch control rationally Line, improve the performance of the clutch, etc., but also organized a group of articles, published in the next, for readers reference.