초록 ▼

Wheels of rail vehicles are trued while the wheels are kept rotating about a wheel center of rotation that is continuously corrected to keep the center of rotation in a fixed position in response to eccentricities a wheel may have, especially in its outer circumference. For this purpose, a sensor fo

Wheels of rail vehicles are trued while the wheels are kept rotating about a wheel center of rotation that is continuously corrected to keep the center of rotation in a fixed position in response to eccentricities a wheel may have, especially in its outer circumference. For this purpose, a sensor for each wheel of two wheels forming a set senses a respective excursion of a center of rotation of each wheel being trued in a set to provide respective excursion signals which are supplied to a central processing unit that provides control signals to a power drive for wheel guide rollers which support the wheel set to be trued. The power drive applies wheel position adjusting force components, preferably directed radially relative to the respective wheel rotational axis in response to the control signals from the central processing unit whereby the excursions are compensated and the wheel rotation center is kept in a fixed position. The truing machine is an under-floor machine equipped with sensors for sensing the excursions and with a central computerized control for producing correction signals from excursion signals to control the wheel guide roller power drive.

대표청구항 ▼

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 positio

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.