During both running and wheel cut operations, railway vehicle wheels and the friction rollers which support and drive the wheelset on a typical wheel cut lathe are subject to wear and hence are likely to develop out-of-round characteristics after sustained use. The resulting out-of-round wheels can significantly affect the ride quality of services and can potentially increase the incidence of fatigue related component failures due to resultant higher intensity loading cycles. Furthermore, the corresponding out-of-round of the lathe's friction rollers will continue to degrade subsequent cut quality of wheels. To allow analysis of the out-of-round characteristics generated using an underfloor wheel lathe operated by China high Speed train, a mathematical model based on typical EMU vehicle's wheelsets and their interactions with the wheel lathe friction rollers was established. The influencing factors on cut process, including number of cuts, eccentricity forms of the friction rollers, and the longitudinal spacing of the two rollers have on the cut quality of the wheels has been analysed. The results show that two cut can effectively remove the high order polygon on the wheel surface. The eccentricity and phase angle of the friction rollers has no influence on the cut quality of high order polygons, whereas conversely, it http://mc.manuscriptcentral.com/JRRT
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