针对细长轴传统加工过程中变形大、质量一致性差等问题，提出立式双刀车削细长轴的加工方式。借助 有限元软件开展细长轴立式单刀、双刀车削过程中的动态切削力及变形分析，对比相同切削参数下单、双刀车削细 长轴时的切削力平稳性及工件变形量。结果表明：双刀车削能有效缩短切削力进入稳定段的时间，且双刀车削引起 的细长轴弯曲变形量仅为单刀车削的6.6%。立式双刀车削能够有效减小细长轴加工过程中的弯曲变形，为细长轴的 高速切削提供基础。
Aiming at the problems of large deformation and poor quality consistency in the traditional machining process of slender shaft, the machining method of vertical double tool turning slender shaft is proposed。 The dynamic cutting force and deformation analysis in the vertical single tool and double tool turning process of slender shaft are carried out with the help of finite element software. The cutting force stability and work piece deformation of single tool and double tool turning slender shaft with the same cutting parameters are compared. The results show that double tool turning can effectively shorten the time when the cutting force enters the stable stage, and the bending deformation of slender shaft caused by double tool turning is only 6.6% of that caused by single tool turning. Vertical double tool turning can effectively reduce the bending deformation in the machining process of slender shaft, which provides a basis for high-speed cutting of slender shaft.