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螺杆钻具发动机的螺杆(转子)是该机关键零件之一。螺杆的主要技术规格:长度1409±3mm:波形螺纹长1379±2mm:螺纹轴向横截面直径φ20_(0.045)导程t=96mm,为单头左旋。铣削前毛料直径为φ28mm:毛料总长(加上工艺长度)为1610mm.直径与长度之比约为1:60左右。所以,该螺杆是一个典型的大螺距波形螺纹细长工件(见图1)。我厂二车间去年接受加工螺杆任务后,在试制过程中曾遇到不少困难。一是工装问题:二是无专用机床加工。针对这一情况,大家集思广益,改造旧设备,革新工装,改进刀具,解决了生产问题,只用二十多天的时间,终于将螺杆试制成功。现将试制中取得的一些经验介绍如下:
Screw drill engine screw (rotor) is one of the key components of the machine. The main technical specifications of the screw: Length 1409 ± 3mm: Wave length 1379 ± 2mm: Diameter of the axial cross-section φ20_ (0.045) Lead t = 96mm, for the single-headed left-handed. The diameter of the wool before milling is φ28mm: the total length of the wool (plus the length of the craft) is 1610mm, the ratio of the diameter to the length is about 1:60. Therefore, the screw is a typical large-pitch wave thread elongated workpiece (see Figure 1). I plant two workshops last year to accept the task of processing screw, in the trial process encountered many difficulties. First, tooling problems: Second, there is no special machine tool processing. In response to this situation, we brainstorm, transform the old equipment, innovative tooling, improve the tool to solve the production problem, only twenty days, finally the screw trial success. Now some of the experience gained in trial production are as follows: