The restoration of physical and mechanical properties of wheel rim metal

Despite reduced resistance to wheel rim wear, after every grinding, only geometrical parameters of wheels are restored at maintenance depots. A tendency towards a decrease in the exploitation of wheel rim working edge induces the acquisition of new wheels, is related to a considerable increase in axle load and train speed as well as linked to the ineffective methods of repairing wheel rim working edge. A solution to the problem of restoring the surface of wheelset rolling, as a wider problem of rolling stock durability, is determined by the fact that the breakdown of the rolling wheelset and the loss of its efficiency shortens the service time of the wheelset. The cost of pointless and inefficient renovations of geometrical wheelset parameters increases and is of a very high rate. The problem of efficient renovations to rims and steel used for wheels within the maintenance of wheelsets becomes a burning issue today

Wheel set run profile renewing method effectiveness estimation

At all the repair enterprises, despite decreased rim wear-off resistance, after every grinding only geometry wheel profile parameters are renewed. Exploit wheel rim work edge decrease tendency is noticed what induces acquiring new wheels. This is related to considerable axle load and train speed increase and also because of wheel work edge repair method imperfection

Durability increase of locomotive wheel sets flanges

This paper presented aim of the work, which is to increase railroad truck durability by using technological equipment for regularly changing roll surface and transversal axle profile hardening degree at automatic regime during electricmechanical processing (EMA). Two different systems have been analyzed. Flexible electric-mechanical processing automation system is meant for scientific research and element processing in unit-rate production. Rigid automated system is designed for manufacture. Flexible automated system is designed and made on PESM basisVytauto Didžiojo universitetasŽemės ūkio akademij