Slightness axis is easy to bend and shake in machining process because of stiffness weakness,so precision and rough-ness are out of tolerance. In order to overcome the shortcoming,workpiece was aligned in heat before machining,necessary heat treat-ment process was arranged,center rest or follow-rest was used to improve workpiece stiffness in machining,bend was reduced by using elasticity center,tool's angle and cutting thickness were selected reasonably. So machining quality and efficiency are assured.%细长轴的刚性差，极易产生弯曲和振动，影响工件的加工精度和表面粗糙度。在加工前，采用热校直法校直毛坯，并安排必要的热处理工序；在加工时，用中心架或跟刀架提高工件刚性，采用弹性顶尖减少弯曲，选择合理的刀具角度和切削要素，以保证工件的加工质量和提高生产率。
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