Process for measuring and grinding the profile of a rail head

Abstract From the Canadian patent

By means of several measuring sensors the distances from several generatrices of the rail-head profile to a reference base are measured and are compared as actual values with predetermined desired distance values. The grinding heads which are set to a specific generatrix and which grind a facet at an angle of inclination corresponding to the position of each generatrix, are always lifted off automatically when this facet reaches the position corresponding to the desired distance value in relation to the reference base. Because the distance to a particular generatrix, on which is located the vertex line of two adjacent facets of a pair of facets, is measured as an actual value, any two …