众所周知,当锥孔以大端端面为基面进行加工时,这种加工方法保证了大端端面与锥孔中心线的相互垂直关系,因此在锥孔测量中采用加工基面作为测量基面,可以得到比较准确的测量结束。但是在万能工具显微镜上应用灵敏杠杆或电眼触头测量锥孔角度时,由于测量条件的限制,无法按加工基面进行,迫使我们不得不采用非加工基面——锥孔 As we all know, when the tapered bore to the large end face of the base for processing, this processing method to ensure the large end face and cone bore centerline perpendicular to each other, so the measurement of tapered bore used as the base surface measurement, You can get a more accurate measurement of the end. However, in the omnipotent tool microscope, the use of sensitive lever or electric eye contact to measure taper angle, due to the measurement conditions, can not be processed according to the base surface, forcing us to have non-machining base surface - tapered bore