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锥管螺纹的中径是指在沿垂直于轴线方向的给定基准面上量得相应圆锥面的直径。这个圆锥面系假想的,在此圆锥面上,它把螺牙切成牙厚与牙槽宽度相等的两部分。对锥管螺纹制件,通常用螺纹工作量规,按量规端面与制件端面的不重合度来检验其作用中径偏差,塞规在大端(基面)制成台阶式,环规基面与端面重合,小端制成台阶式。锥管螺纹环规基面中径测量方法是和已知基面中径值的塞规旋合,测量塞规与环规基面间的距离,由塞规基面中径值和此距离量计算求得。为测量锥管螺纹塞规中径,作为对用正弦规、三针、测微量仪测量方法的改进,我厂设计制作了一种锥管螺纹中
The diameter of the taper pipe thread refers to the diameter of the corresponding conical surface measured on a given reference plane perpendicular to the axial direction. This conical surface is hypothetical, on this conical surface, it cuts the thread into two parts equal in thickness to the width of the groove. For tapered pipe parts, thread gauges are usually used to check the deviation of the working diameter according to the misalignment between the gauge end face and the end face of the part. The plug gauge is formed on the large end (base face) Coincides with the end face, the small end made of stepped. Taper pipe thread ring surface diameter measurement method is based on the base diameter of the known Cypriot gauge screwed together to measure the distance between the plug gauge and the base surface of the ring gauge by the gauge surface diameter and the distance Calculated. In order to measure the diameter of the pipe plug gauge, as a measure of the use of sine, three-pin, measuring micrometer improvement, I designed a tapered pipe thread