我们在铣削花键轴时,要求全长一次铣出,因两端轴颈过短,铣刀退不出来。单件生产时,通常将一端轴颈加长,铣出全长花键再去掉加长的工艺台,并重新打中心孔,比较麻烦。为此,我们自制加长顶尖轴,在机床(或分度头)主轴孔中安装使用。加长顶尖前端有螺纹、配有螺母、顶尖轴外面装上带有3个尖齿的套筒。使用时先将花键轴安装在机床前、后顶 When milling the spline shaft, we need to mill the entire length at one time, because the two ends of the journal is too short, the cutter can not be withdrawn. A single piece of production, usually one end of the shaft lengthened, milling the full length spline and then remove the longer process stage, and re-hit the center hole, more trouble. To this end, we self-lengthen the top shaft, installed in the machine tool (or indexing head) spindle hole. Extended tip The front end is threaded with a nut and the top shaft is fitted with a sleeve with 3 tines. Use the spline shaft first installed in the machine before, after the top