RAILWAY WHEEL MANUFACTURE METHOD Russian patent published in 1997 - IPC

FIELD: plastic working of metals, in particular, hot and cold working of metals. SUBSTANCE: method involves forming rim by rolling; gaging rim width till obtaining parallel side surfaces perpendicular to wheel axle; performing mechanical and thermal treatment. Mechanical treatment of rim is conducted till side surface of wheel at inner side is disposed at an angle to outer side surface of rim. Final forming of rim is effectuated at thermal treatment stage so that side surfaces are in parallel one with the other and perpendicular to wheel axle, with parallelism being provided by subjecting them to thermal stresses during quenching. EFFECT: increased efficiency and enhanced reliability in operation. 2 dwg