Coaxiality calibration method based on three-axis coordinate system

The invention discloses a coaxiality calibration method based on a three-axis coordinate system, which comprises a bottom plate, a side plate is welded on the right side of the top of the bottom plate, a sleeve is sleeved in the side plate, five groups of clamping mechanisms arranged in an annular array are arranged in the sleeve, a support plate is arranged on the surface of the top of the side plate, and a fixing plate is welded on the left side of the top of the bottom plate. The top end of the fixing plate is fixedly connected with a second ruler penetrating and extending to the right side of the supporting plate, the outer rings, located on the left side and the right side of the side plate, of the second ruler are sleeved with movable pipes, connecting rods are arranged at the bottoms of the movable pipes, and movable columns are welded to the ends, close to each other, of the connecting rods. According to the invention, the length and diameter data of the cylinder are measured in a simple and rapid man