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大批加工图1所示的零件,其传统方法是先加工出T型螺纹（TL）再车制φ孔,得到图中的不完全螺母。而上述方法的缺点为:（1）材料浪费大;（2）切出的螺纹经扩孔后出现大量飞边毛刺,清理十分费力;（3）多了扩φ孔一道工序耗工费时。 基于上述原因,考虑φ孔无配合要求,将φ孔铸出完全不影响使用而直接加工出（TL）。但随之而来的问题是（TL）在加工中的测量问题。即φ孔铸出后无法使用螺纹通止规。下述的方法巧妙的解决了这一问题。 图2为零件在车床角铁式夹具上加工及测量的示意图,其原理为:在夹具法兰上设置了测量辅助孔D,在螺纹通止规上设置了引导圆柱d,于是在具备下列条件时就可对（TL）及（TL）与零件其它关联要素进行满足工作图要求的测量。（1）D与机床主轴的同轴
A large number of processing parts shown in Figure 1, the traditional method is to first process the T-type thread (TL) and then made φ hole, get the incomplete nut. The shortcomings of the above method are: (1) a large waste of materials; (2) a large number of flash burrs appear after a screwed-out thread is cut out, and the cleaning is very labor-intensive; (3) Based on the above reasons, consider φ hole without the requirements of the match, the hole φ cast without any impact on the use of direct processing (TL). But the ensuing problem is the measurement of (TL) in processing. That is, after the hole φ cast can not be used thread through rules. The following method cleverly solved this problem. Figure 2 is a part of the lathe angle iron jig on the processing and measurement of the schematic diagram, the principle is: the fixture flange set up a measuring aid hole D, set in the thread guide through the guide cylinder d, then meet the following conditions (TL) and (TL) and other parts of the associated elements to meet the requirements of the work map measurements. (1) D Coaxial with the machine spindle