CNC Under-floor Wheel Lathe is applicable to all types of CRH EMUs and existing passenger cars and freight cars, realizing the automatic re-profiling of wheel flange tread without disassembly of the wheel set, as well as the automatic re-profiling of the flange tread of a single wheel set. It can meet the requirement for simultaneously automatic re-profiling of two wheel sets of one bogie.
● Rated power: ≤ 100 kW
● Temperature control of electrical cabinet: Controlled by industrial air conditioner
● Machining efficiency: ≤35 min/bogie
● Equipment noise (excluding that in the cutting state) ≤75dB
● Operation interface of CNC system: Chinese or Optional
● Range of wheel set machining:
● Track gauge: 1435mm or Customized
● Range of wheel diameter: φ650mm~φ1400mm
● Range of tread width: 90mm~160mm
● Range of axle length: 1600mm~2600mm
● Distance between backs of wheel flanges: 1353mm±2mm
● Axle load: ≤250kN
● Driving and positioning devices:
● Driving mode of main transmission: Friction power drive by roller
● Spindle speed steps: AC variable frequency stepless adjustable
● Diameter of friction roller: ≥220mm
● Distance between centers of friction rollers: ≥440mm
● Power of main driving unit: 30 kW×2=60kW
● Protection class of main drive: IP54
● Tool rest (single tool test) :
● Range of feeds (feeding speed): 0~2.5 mm/r
● Moving speed of tool rest: Z-axis 4.7m/min X-axis 2m/min
● Maximum cutting sectional area: ≤10 mm²
● Cutting force: ≤26 kN
● Range of cutting speed: 30 ~ 120 m/min
● Measuring device (single measuring device) :
● System of units for measuring system: Metric system
● Measuring transducer element: HEIDENHAIN, AMO
● Quantity of measuring axis: Six (including UX-axis, VZ-axis and AD-axis at each side)
● Diameter measuring method: circumferential contact measurement
● Quantity of roller for diameter measurement: 2 sets
● Diameter of roller for diameter measurement: 80mm
● Range of diameter measurement: Ф650- 1400 mm
● Number of digits after the decimal point kept for diameter measurement: 2 (i.e. the indicated measured value shall be accurate to 0.01 mm)
● Contour and abrasion measuring method: continuously scanning measurement.
● Quantity of roller for contour and abrasion measurement: 2 sets
● Diameter of roller for contour and abrasion measurement: 80mm
● Quantity of contour measuring point: 50-100 points
● Number of digits after the decimal point kept for abrasion measurement: 2
● Mode of contact between measuring head and inner side: pre-compressing mode.
● Inner side measuring method: pre-compressing circumferential contact measurement.
● Positioning and measuring head for distance between backs of wheel flanges: 2 sets
● Pre-compressing stroke of measuring head: 5mm
● Quantity and distribution of measuring point: circumferentially continuous point on the inner side.
● Machining accuracy:
● Maximum difference of wheel diameter of the same axle: ≤ 0.10 mm
● Maximum difference of wheel diameter of the same bogie: ≤ 0.30 mm
● Radial run-out of the measured circle height: ≤ 0.10 mm
● Run-out of end face: ≤ 0.30 mm
● Geometric deviation of contour: ≤ 0.20 mm
● Surface roughness for contour machining: Ra≤12.5 µm
● Others:
● Installation dimension of lathe (L × W × H): 8000mm×6800mm×2300mm
● Weight of lathe: 40000kg