The invention discloses a molding
grinding wheel dressing data acquiring method based on a multi-axis linkage precision measuring
system. According to the molding
grinding wheel dressing data acquiring method, a test piece of a
complex type wire part is installed in the multi-axis linkage precision measuring
system, a segmented dual-axis linkage measuring path is adopted to project a
motion control scheme after basic data are inputted into a necessary
software of the multi-axis linkage precision measuring
system, an equal arc-length differential sampling method is adopted to collect measuringdata, theoretical design points are then fitted to determine the normal vector of each point, the theoretical design points are taken as
moving window interpolation centers, local curvilinear functions of the measured data in the design points are determined by adopting a
moving window Lagrange interpolation polynomial, the distances from the theoretical design point to local curves is calculatedin accordance with the design points, the normal vectors and the local curves, and the distances is namely the normal error values of the theoretical design points of a
grinding wheel, that is the reference data of the secondary
grinding wheel dressing. According to the molding
grinding wheel dressing data acquiring method, the secondary
grinding wheel dressing data is thus acquired through the detection of
complex type wire part
contour error results acquired by forming grinding.