R-test precision ball head detection device and calibration method thereof

The invention discloses an R-test precision ball head detection device, which comprises a five-dimensional manual sliding table, an R-test ball head and a mounting seat, wherein the mounting seat is provided with three mounting surfaces for mounting sensors, and a reference surface A and a reference surface B for calibration, the mounting seat is fixedly mounted on the top surface of the five-dimensional manual sliding table, displacement sensors are fixedly mounted on the mounting surfaces of the mounting seat, the extension lines of the three displacement sensors are orthogonal to a point P,and the center of sphere of the R-test ball head is located at the point P. According to the invention, by arranging the mounting seat with the reference surface A and the reference surface B, afterthe sensor is mounted, the detection device can be calibrated, so that the positioning error when the R-test detection device is mounted and positioned on the workbench of the processing machine toolis reduced, the detection r