High Precision CNC Profile Surface Grinding Machine

JL-50400 CNC

HIGH PRECISION CNC PROFILE SURFACE GRINDING MACHINE JL-50400 CNC

Manufacturing process:

  • JL-50400CNC Rail grinding machine is equipped with two vertical spindles and one horizontal spindle. X,Y, Z axis are all driven by servo motors. Longitudinal is driven by ball screw and servo motor. Working piece (rail) will be fixed on a fixture or permanent magnetic chuck, and ground two sides and surface at the same time.
  • One horizontal spindle on the side of column is for grinding the surface of linear way, vertical and transverse axis of the spindle are driven by servo motors.
  • Two vertical spindles and one horizontal spindle can process at the same time.
  • Two diamond dressers at the side of magnetic chuck will dress the vertical wheels.
  • One vertical diamond dressing roller device is at the left side of working piece, with double sides (left-right) rotation. Twin grinding wheels are dressed by the same diamond wheel to make sure the profile and dimensions of twin grinding wheels are the same to eatch other. Rails are ground to have the same lateral profile of both sides, dimensions and surface roughness.
  • There is one horizontal diamond dressing roller device at the right side of working piece, with double sides (left-right) rotation. The max. width of the diamond roller is 75mm. To grind the standard flat of rail with profile (shape) diamond roller

Structure:

  • Fixed double columns
    • With Abbe’s principle, to reduce the distance between location datum line and rails to the minimum limitation.
    • With thermally symmetrical double column structure, it has excellent structure rigidity and the advantage to reduce the thermal effects. It also can sustain the very stable accuracy of machine in the long run.
    • Solid design of machine bed can increase the rigidity of the machine body.
  • Inside of the machine base is designed as ”八 shape” , which diverts the the forces of slides (orbits) to leveling screws, to secure better supporting construction.
  • With thermally symmetrical double column structure, it has excellent structure rigidity and the advantage to reduce the thermal effects. It also can sustain the very stable accuracy of machine in the long run.
  • 4 linear guideway on Y axis have more restrictions. It can eliminate the displacement between rails and can ensure the accuracy of running during process.
  • Main structure is die-cast by premium FC30 material. With tempering treatment (annealing) and naturally stress relief to eliminate the internal stress of diecast completely, to make sure the accuracy of machining process.
  • Spindle, shaft of diamond grinding wheel and linear encoder are equipped with sealing system. Vapor and particle won’t enter into bearing and linear scale to ensure a longer survice life.

Specification:

Items Unit Dimensions/values
Processing range Worktable area mm 400*4100
Maximum grinding area mm 400*4875
Magnetic table area mm 80*4080
Distance from top of grinding wheel to worktable surface (Z axis) mm Min.355~ Max.480
Distance from bottom of gring wheel of working piece to worktable surface mm 385
Distance from grinding wheel to worktable surface(secondary shaft) Min.0~ Max.390
Twin spindle Servo motor (continuous) KW 20/27.5
Spindle rotating velocity rpm 1260 ~ 2270 (0~3000)
Grinding wheel (OD*Thickness*ID) mm Ø 510*50(75)* Ø 203.2
X righ & left movement(ball screw) Stroke mm 5550
Ball Screw (Diameter*Screw pitch) mm Ø 63*50
Servo motor KW  12.1
reduction ratio 1:2.5/gear reduction
Moving velocity m/min 0-40
Linear guideway 55 type linear guideway
Y forward & backward movement (2 shaft) Stroke mm 180
Ball screw(diamer*screw pitch) mm Ø 40*5
Servo motor KW 2.85
Reduction ratio   1:3/belt wheel reduction
Movement velocity m/min  5
Minumum unit mm 0.001
Linear guideway   45 type linear guideway
Z up&down movement (2 shaft) Stroke mm 125
Ball screw (diameter*screw pitch) mm Ø 40*5
Servo motor KW 2.85
Reduction ratio   1:10/planet gear reduction
movement velocity m/min 1.5
Minimum unit mm 0.001
Linear guideway   45 type linear guideway
Grinding wheel dresser Diamond wheel (OD*Thickness*ID) mm Ø 140*max.80* Ø 50.8 ~ Ø52 Inside hole and assembly depends on customer request
Maximum velocity rpm 6000
Servo motor KW 1.74
Reduction ratio   1.33:1/belt wheel reduction
Horizontal secondary shaft stroke of up&down *forward&backward mm 410*440
Induction motor rpm 6000
Servo motor Kw 1.57
Weight Machine weight kg 32000
Space Machine volume mm 14900*3640*2890