T140推土机最终传动部分的轴端法兰(见图1),内孔锥度为1:10,其等分的6个24mm宽键槽的加工,我们过去一直采用等齿距单键拉刀进行拉削。由于拉削长度为180mm,所设计的拉刀齿距大,在一根限定长度的拉刀上齿数少,拉削量不能增大,加工一个键槽要拉削8刀,加工一个零件则需拉削48刀。生产效率低,工人劳动强度大;拉削次数多,键槽两侧面的光洁度不高。另外,由于拉削齿距大,拉 T140 bulldozer final drive part of the shaft flange (see Figure 1), the inner taper of 1:10, which is divided into six 24mm wide keyway processing, we have been using a single pitch broach broach broaching . As the broaching length of 180mm, the broach designed tooth pitch, a limited length of the broach on a small number of teeth, the amount of broaching can not be increased, the processing of a keyway to broach 8 knives, processing a part is required to pull Cut 48 knife. Low production efficiency, workers labor-intensive; broaching times, the keyway on both sides of the finish is not high. In addition, due to broaching pitch, pull