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US 4,785,589 AGranted
Process for measuring and grinding the profile of a rail head
AssigneeLes Fils d'Auguste Scheuchzer S.A.
InventorFritz Buhler
Life of this patent
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AssigneeLes Fils d'Auguste Scheuchzer S.A.
InventorFritz Buhler
Estimating the term…
By means of several measuring sensors (C1 to C6), the distance (h1 to h6) from several generatrices (s1) to s6) 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 adjacent facets can be checked simultaneously by means of one and the same measuring sensor (C1 to C6). The two facets of a pair of facets are ground by means of a double grinding head set to the vertex line and having two grinding wheels, the grinding planes of which form a predetermined working angle (.alpha.) with one another which corresponds to the desired profile. The control of the grinding heads therefore merely involves a simple comparison between desired values and actual values of distances; furthermore, double the number of facets can be checked by means of a specific number of measuring sensors, and consequently the rail profile can be approximated as closely as possible.
A process of measuring and grinding the profile of a rail head which comprises simultaneously grinding several facets of the rail head by a plurality of grinding wheels disposed at different predetermined angles of inclination to correspond to the desired profile, continuously measuring distances from a reference base defined by a measuring frame to several generatrices distributed over the profile of the rail head as actual values to determine the actual profile, comparing actual measured values with predetermined desired values during the grinding operation and lifting each of said grinding wheels off to an inoperative position whenever a facet ground by said grinding wheel reaches a position corresponding to the desired distance value in relation to said reference base.
A rail-grinding car for measuring and grinding the profile of a rail head, comprising a measuring frame, a plurality of grinding heads adjustably mounted on said measuring frame for height and inclination adjustment, a plurality of sensors mounted on said measuring frame for measuring the actual distance between respective generatrices of the surface of said rail head and a reference base established by said measuring frame, means for controlling the height and inclination adjustment of said grinding heads, said control means comprising an analyzer which receives outputs of all of said sensors, stores, desired values of distances of all generatrices of said rail head surface, compares actual distances measured by said sensors with corresponding stored desired values and controls a control unit for lifting grinding heads to inoperative position when measured distance to the generatrix ground by the respective grinding head reaches the desired value.
Dependencies are inferred from the claim text.