我厂生产如图1所示的弯螺脚,一端需制成锯齿形螺纹。过去都是用活动板牙切割螺纹,切出的螺纹质量差,效率低,板牙消耗多,工序复杂。我们设计制造了一套滚丝轮。开始按滚压普通三角螺纹方法进行加工,结果失败了。后来我们根据锯齿形螺纹特点进行了分析(图2):在滚压时,滚丝轮施加于工件的径向力为P,P=32(HB+28),式中HB为工件布 I plant production as shown in Figure 1 bent screw, one end to be made serrated thread. In the past are cutting the thread with removable teeth, cut the thread of poor quality, low efficiency, the cost of board teeth, process complexity. We designed and manufactured a set of roller. Start by rolling the normal triangular thread method of processing, the result failed. Later, we analyzed the characteristics of serrated threads (Figure 2): During rolling, the radial force exerted by the roller on the workpiece is P, P = 32 (HB + 28), where HB is the workpiece fabric