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由于受设备的限制,国内厂家一般是在调质的丝杠毛坯上粗车螺纹滚道,中频淬火后再进行螺纹磨削;另一种方法是在淬硬的丝杠毛坯上磨出螺纹滚道。前一种方法存在热处理问题,而后一种效率低。我厂在多年生产实践中,利用陶瓷刀具在车床上加工淬硬的滚珠丝杠螺纹滚道,取得了显著的技术经济效益。滚珠丝杠属于细长轴类零件,一般长径比 L/d>25,刚性差。由于丝杠自重和旋转离心力、切削力的作用,容易弯曲变形和产生高频振动,导致刀刃崩裂。
Due to equipment constraints, the domestic manufacturers are generally in the quenched and rough lead screw rough raceway, intermediate frequency quenching and then thread grinding; the other method is in the hardened screw rough grinding thread rolling Road. The former method has a heat treatment problem, and the latter is inefficient. I plant in many years of production practice, the use of ceramic cutting tools in the lathe machining hardened ball screw thread raceway, made significant technical and economic benefits. Ball screw is a slender shaft parts, the general aspect ratio L / d> 25, poor rigidity. Due to the weight of screw and rotary centrifugal force, the role of cutting force, easy to bend and produce high-frequency vibration, leading to blade edge cracking.