Method for reprofiling wheelsets on underfloor wheel lathes

A method for machining the profiles of first and second wheel discs of a wheelset for a vehicle operable to travel on rails while the wheelset is rotatably mounted on the rail vehicle in first and second axle bearing housings of the rail vehicle, the method comprising:

• providing an underfloor wheelset lathe equipped with machining tools, a machine control for the machining tools, a plurality of drive rollers, first and second axial guide rollers, first and second measuring rollers, and first and second devices operable to, respectively, fix the first and second axle bearing housings;
• lifting the wheelset off the rails;
• determining a wheel load at the wheelset;
• fixing the first and second axle bearing housings, respectively, with the first and second devices;
• contacting each of the first and second axial guide rollers, respectively, with an inner side of each the first and second wheel discs of the wheelset and fixing each of the axial guide rollers in place;
• supporting the first and second wheel discs with the drive rollers against the wheel load by a force;
• measuring an actual profile of each of the first and second wheel discs with the first and second measuring rollers;
• determining a smallest actual diameter from the actual profiles of the first and second wheel discs;
• determining a target diameter by subtracting a machining allowance from the smallest actual diameter;
• and
• entering the target diameter into the machine control for the machining tools.