What is a railway with an underfloor wheel lathes machine?
The CNC Underfloor Wheel Lathe machine is applicable to all models of CRH EMUs, contemporary passenger cars, and freight cars, and has the capacity to automatically reprofile the flange tread of a single wheelset without removing the wheelset. It can meet the need for two wheel sets on a single bogie to be automatically reprofiled at the same time.
The CNC underfloor wheel lathes railway's semi-closed loop control function enables automatic turning of the wheelset tread profile.
The lathe has both automatic and manual control modes and allows for simultaneous machining on either one or both sides.
Wheelset treads on all CRH EMU models and other vehicles can be automatically reprofiled, and spindle box clamps can be changed out. Less than 300 mm make up the press-down mechanism's operational overhang.
The press-down mechanism's elevation (except the clamps) is identical to that of the rail between cars in order to enable the machining of the wheelset under the special circumstances of the lower vehicle apron and closer proximity to the spindle box.
In friction roller driving mode, the main drive is employed. The friction-driving rollers support and power the wheelset that is being machined, and they also allow for the wheelset's radial orientation. Separate left and right roller racks are employed for friction driving, and each roller rack is powered by a distinct spindle motor.
The press-down mechanism's elevation (except the clamps) is identical to that of the rail between cars in order to enable the machining of the wheelset under the special circumstances of the lower vehicle apron and closer proximity to the spindle box.
In friction roller driving mode, the main drive is employed. The friction-driving rollers support and power the wheelset that is being machined, and they also allow for the wheelset's radial orientation. Separate left and right roller racks are employed for friction driving, and each roller rack is powered by a distinct spindle motor.
The values that were measured for the wheelset prior to machining included the wheel diameter, Qr value, the distance between the backs of the wheel flanges, tread run-out and axial play, wheel flange thickness, wheel flange height, and a contour drawing of the track on the wheel flange.
The machining targets are the wheel diameter and wheel flange thickness.
The following measurements were made for the wheelset after machining: wheel diameter, Qr value, the distance between the backs of the wheels' flanges, axial play and tread run-out, height and thickness of the wheels' flanges, and a contour drawing of the tread on the wheels' flanges.
By displaying machining procedures with different wheel flange thicknesses and wheel diameters on the operator interface for the operator's choice, the control system's "machining suggestion" function enables cost-effective re-profiling and enables the wheel diameter difference to be brought within the operating window's specified limit.
The shape of the wheelset is determined using the continuous measurement method to guarantee measurement accuracy of the contour, make the number of measuring points variable between 50 and 100 and accomplish acceptable and cost-effective re-profiling.
Safety lights that illuminate easily visible locations and display the wheelset's initial positioning status must be fitted in order to direct the feeding and retracting of the machined vehicle.
The networking capability of the lathe enables interaction with the wheelset's tread diagnosis system and integration with the EMU information management system.