Machine tool profile measurement and scanning device - tests profile derived from energy density variations against surface polynomial

摘要

The measurement and scanning device is partic. for use in machine tool mfg. processes, enables machine tools with continuous and discontinuous profiles, to be made in a single-stage production process also enabling enlargement and reduction. The co-ordinates of a point on a reference surface and the derivative of the polynomial describing the surface are determined and the profile tested in the direction of the polynomial. In a three axis system a signal generator produces its highest concentration of normally distributed electromagnetic energy at the measurement point. Defocussing produces lower energy densities than for a normal distribution in front of and behind the measurement point. The sensor determines the highest density point and the defocussing rate. The measured variation function is compared with a reference to determine the relative profile.