我厂齿轮齿坯孔的加工,批量大,精度要求二级以上,光洁度▽7。过去用单刃刀在车床上镗削或用铰刀铰孔,既费工费时,又不易控制。齿轮车间的老师傅经反复研究,利用普通车床床身底座等零件,改装了一台拉孔机床,工效提高十几倍,质量稳定,孔型尺寸附合图纸要求。现将该机床的结构及使用方法介绍如下: I plant tooth gear billet hole processing, large quantities, accuracy requirements of two or more, finish ▽ 7. In the past with a single-edged knife in the lathe boring or reaming reaming, both time-consuming and difficult to control. Gear workshop master after repeated research, the use of ordinary lathe bed base and other parts, modified a hole machine, work efficiency increased ten times, quality and hole size with drawings requirements. Now the structure of the machine and the use of methods described below: