The ball screw is a typical slender part. It is difficult to get satisfactory geometrical accuracy and surface roughness af-ter machining because of larger aspect ratio. The traditional process is "tuming-quench-rough grinding-fine grinding". The cost of grinding machine is very high, the time-consuming and energy consumption are bigger though the grinding process can improve the quality of ball screw. A new machining process of ball screw was introduced. A new special CNC lathe machine which was used to ball screw machining was designed and manufactured. The new process of " turning- quench-finish turning - grinding" was adapted to re-solve the ball screw machining problem. The product efficiency is improved and the cost is reduced.%滚珠丝杠属典型的细长轴类零件,由于其长径比比较大,加工后很难获得满意的表面粗糙度和几何精度.传统的滚珠丝杠加工方法是“车-淬-粗磨-精磨”,采用磨削工序能提高滚珠丝杠的加工质量,但磨削设备造价较高,磨削工序耗时较长,能源消耗大.探讨滚珠丝杠加工的工艺方法,设计制造一种新型的丝杠加工专用数控车床,并采用“车-淬-精车-磨”的新工艺,提高了生产效率,降低了生产成本,解决了滚珠丝杠的加工难题.
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