轧钢机上的人字齿轮是用指状铣刀加工出来的,这种铣刀外面很难买到。由于生产的需要,只好自己动手制造。制造上碰到的第一个问题是铣刀外形的加工。原先考虑用样板刀加工,但样板刀本身的制造就有许多困难;以后考虑用靠模加工。我们知道,用靠模加工,必须拆去进刀丝杆,再装上弹簧和配重等一套装置,也相当费事。车工刘厚兴师傅根据他的经验,边做边想,终于设计成简易的靠模装置。这个靠模装置不但适于指状铣刀的加工,而且也适于其他不同形状零件的加工。靠模装置如附图所示。1是工件,装在三爪卡盘上。3是样板固定杆,装在尾座4上。2是样板,固定在固定杆3上。6是指针杆,装在四方刀架上。指针杆6上装固定套5和指针9,用螺帽7、8固定。 Herringbone gears on the rolling mill are machined out of finger mills, which are hard to find outside. Due to the needs of production, had to do it yourself. The first problem encountered in the manufacture of milling cutter shape processing. Originally considered with the model knife processing, but the model knife itself, there are many manufacturing difficulties; later consider the use of mold processing. We know that with the model processing, you must remove the feed screw, and then loaded with a set of springs and counterweights, but also quite troublesome. According to his experience, Liu Houxing, a mechanic in the caravan, thought while doing his work, and finally designed a simple mastering device. This mastering device is not only suitable for the processing of finger milling cutter, but also for the processing of other parts of different shapes. Model by the device as shown in the figure. 1 is the workpiece, mounted on a three-jaw chuck. 3 is a model fixed rod, mounted on the tailstock 4. 2 is a model, fixed to the fixed rod 3. 6 is the pointer rod, mounted on the square knife holder. The pointer rod 6 is provided with a fixing sleeve 5 and a pointer 9, which are fixed with nuts 7 and 8.