内排屑丝锥(见图1、2)是一种新型加工内螺纹的螺纹刀具。它适于加工重型机械、发电机和汽轮机等对螺纹精度要求较高的大直径螺纹。由于重型机械的零件一般都是比较大的,其本身的价值和所需要的加工费用都较昂贵,而且对这些零件的要求也很严格。因此,要保证这些大型零件的加工质量,尤其是 The internal chip tap (see Figure 1, 2) is a new type of internal thread thread cutting tool. It is suitable for the processing of heavy machinery, generators and turbines and other thread on the high accuracy of large-diameter thread. As heavy machinery parts are generally large, their own value and processing costs are more expensive, but also the requirements of these parts is also very strict. Therefore, to ensure the processing quality of these large parts, especially