초록 ▼

A method and apparatus measure or gage worn railroad wheel profiles for the purposes of ascertaining the location of the new profile relative to the worn profile. The new profile is to be produced by a reprofiling operation such as a truing. For this purpose characteristic points on the worn profile

A method and apparatus measure or gage worn railroad wheel profiles for the purposes of ascertaining the location of the new profile relative to the worn profile. The new profile is to be produced by a reprofiling operation such as a truing. For this purpose characteristic points on the worn profile are contacted in a radial and axial direction by a sensor and the respective displacement of the sensor is measured or gaged relative to a zero or null point. The location of the sensed points is then compared in a computer with a given reference location on a corrected profile. The corrected profile is then contacted with the sensed or gaged point which will make it possible to restore a correct profile with the least possible material removal in a milling or machining operation. In the apparatus for performing this method the sensor for the contacting or gaging of the worn points is preferably supported on a cross-slide enabling the sensor to perform a sensing movement in the axial direction and in the radial direction, preferably under a computerized numerical control.

대표청구항 ▼

A method for ascertaining the radial position of a new profile to be produced by a reprofiling operation with reference to an actual, worn profile not corresponding to a rated profile of a railroad wheel having a fixed location relative to a reference point and of which the axial position of the act

A method for ascertaining the radial position of a new profile to be produced by a reprofiling operation with reference to an actual, worn profile not corresponding to a rated profile of a railroad wheel having a fixed location relative to a reference point and of which the axial position of the actual profile is known, comprising the following steps: (a) ascertaining in a sensing or measuring plane of each wheel (13) at least one surface point (P1) on the wheel tread, (b) ascertaining the radial distance in the X-direction of said surface point (P1) to said reference point, (c) ascertaining in different, but given radial locations at least two points (P3, P4) at each rim flank by an axial gaging in the Z-direction, (d) ascertaining the radial and axial location of said at least two points (P3, P4) relative to a reference profile, and (e) ascertaining the radial location of a rated profile (32, 32′) which rated profile forms a tangent with at least one of the ascertained points, whereby simultaneously at least the other sensed points of the actual profile are located on the rated profile or radially outside the rated profile.