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Method for truing sets of rail vehicle wheels by chip removal and under-floor machine for performing the method

  • US 5,678,963 A
  • Filed: 11/08/1995
  • Issued: 10/21/1997
  • Est. Priority Date: 11/09/1994
  • Status: Expired due to Fees
First Claim
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1. A method for truing at least one of two rail vehicle wheels (5) forming a wheel set (1) having a central rotation axis (6), by chip removal with a tool (2) contoured to form a rated wheel profile on said wheel or wheels in an under-floor truing machine wherein wheel guide rollers (3, 3A) are position adjustable by respective support power drives (8) capable of imparting to the respective wheel a position adjusting force component, each wheel having a center (4) of rotation normally located in a fixed position on said central rotation axis (6) in a trued wheel, comprising the following steps:

  • (a) supporting each wheel of a set of two wheels (5, 5A) by at least two of said wheel guide rollers (3, 3A);

    (b) driving said wheel set for rotating said wheel set about said central rotation axis of said wheel set;

    (c) sensing with a respective sensor for each wheel being trued an eccentricity that would cause an excursion of said center of rotation (4) from said fixed position to produce corresponding eccentricity signals representing the presence of an eccentricity in the respective wheel being trued relative to said fixed position;

    (d) feeding said eccentricity signals to a central processing unit to produce control signals; and

    (e) supplying said control signals to said support power drives (8) for independent controlling through said power drives of (8) the radial position relative to said central rotation axis of at least two wheel guide rollers (3, 3A) provided for each wheel being trued for which an eccentricity has been sensed, by imparting to said two wheel guide rollers a motion component directed radially relative to said central rotation axis (6) such that said excursion of said center (4) of rotation does not occur, whereby said center (4) of rotation is maintained in said fixed position even if the respective wheel has an eccentricity and whereby vibrations of said wheel set are prevented.

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