Accuracy measurement method for precision tapered hole

The invention discloses an accuracy measurement method for a precision tapered hole, comprising steps of using a marble slab to correct a zero position of an accuracy tapered hole accuracy measurement device, and using a standard ring gauge correction accuracy tapered hole accuracy measurement device (3) to measure the big end diameter of the accuracy tapered hole. The beneficial effects of the invention are that the precision tapered accuracy measurement device realizes the synchronization on-line measurement of the taper hole cone angle and the big end diameter, avoids the axial size error of the tapered hole, improves the processing accuracy of the tapered hole, improves the processing efficiency of the tapered hole. The invention is easy in operation, reduces the labor intensity, and simplifies the processing detection flow. The accuracy tapered hole accuracy measurement device is simple and reliable in structure, improves the rate of the finished products, guarantees the product quality and reduces the p