CNC Tandem Under-Floor Wheel Lathe Plant


Operating Principle
The CNC Tandem Under-Floor Wheel Lathe Plant is used to process the bearing surfaces of worn monobloc wheels, tyred wheels and flexible wheels of all kinds of railway assets in accordance with their wheel profile. For both engine driven and carrier wheelsets, the system is able to cut the wheel and brake discs of a wheelset alone, a bogie alone or a bogie still mounted on a car. After measuring the wheel profile of a wheelset, the system calculated the average values on each wheel and do the whole re-profiling turning automatically based on the operator entered new desired values. The fact that the machine is a tandem CNC allows it to perform the cut on a complete bogie at the same time reducing the immobilization time.
Integrated Systems
The CNC Tandem Under-Floor Wheel Lathe has an incredible high number of integrated systems unlike regular CNCs. It has for each wheel (4 for 1 machine) an independently operating tool holder and lathe carrier group, a pair of wheel lifting devices, a profile and wheel diameter measuring device, a mobile and a stationary track, and an independent lubricating system. It has for each wheelset (2 for 1 machine) a semaphore, a wheelset centering and axis box compressing unit, a chips conveyor, and a CNC control unit. For the whole system, there is also a chips grinder, a rail/road shunter, and a calibration wheelset. The whole machine is full of safety barriers and mechanisms to avoid any incident while machine is operational or not.
Installation Details
The CNC Tandem Under-Floor Wheel Lathe Plant is a very complicate and precise system. The system has to be indoor in a dedicated infrastructure of a maintenance depot in order to avoid any kind of interference. The system requires a precise pit for its foundations since the machine will anchor in those foundations, and it will be used for the referencing of the machine. In order to function in optimal conditions, the system needs a careful maintenance and calibration done on a regular basis in order to avoid incorrect measurements. To be more precise in the train movements, a Rail/Road Shunter should be used to pull the train in the correct position. The training of the operators is very important for this system.