High-precision positioning center machining and repairing device and method

The invention discloses a high-precision positioning center machining and repairing device and method. The device comprises a sine bar, a V-shaped block, a roller, a fixed clamping plate, a pressing wheel, a handle and a linkage plate; by rocking and turning the handle, the pressing wheel drives a workpiece to rotate automatically, and the workpiece is machined or repaired through a grinding wheelof a flat grinding machine tool. When the positioning center is machined or repaired, the high-precision center can be obtained through grinding by means of a common flat grinder, due to the fact that the part positioning and machining state is close to the actual using state of the part, the detection method is the same as that of coaxiality detection, in addition, the problem that centers at the two ends of a cylindrical grinder are not concentric is solved, the machining precision is quite high, the diameter range of the ground centers is large, and when the batch of the parts is large, the parts are stable in qua