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    MK250 CNC internal grinding machine Main

    Home - Product - NC internal grinding machine series

    Main characteristics of this machine tools

    ●This machine tools is biaxial linkage CNC internal grinding machine. Through the function transformation of CNC system, it can grind the workpiece inner bore, inner taper hole, stepped hole, inner end face and outer end face. It is especially suitable for inner hole grinding of hydraulic cylinder, gear, etc.
    ●The control system of this machine tools adopts the Siemens CNC system to control the two-axis linkage and achieve the interpolation motion.
    ●The layout of the machine tools adopts the headstock for fixation. The grinding carriage conducts the transverse feed movement (Z-axis). Two shafts are driven by the servo motor to achieve the gapless linear motion with high sensitivity.
    ●The grinding wheel spindle adopts the mechanical grinding wheel spindle. Revolving speed is controlled by the frequency converter, with stepless speed regulation.
    ●The headstock adopts the sleeve spindle structure, with high precision and big work capacity. For workpiece driving, the AC variable frequency motor achieves the stepless speed regulation through the ribbed belt to drive the workpiece to move.
    ●This machine tools adopts the totally enclosed cover, the rear bag type of electrical box and the front rotary control console.

    Specification parameter list

    Model of machine tools MK250
    The range of grinding diameter of hole (mm) 100-500
    Maximum grinding depth (mm) 500
    Swing diameter of work piece (mm) Inside the shell (mm) 510
    Outside the shell (mm) 720
    The maximum stroke of feeding slide (mm) 200
    The maximum stroke of workbench(mm) 730
    Maximum rotation angle of lather head(° ) 30°
    Rotating speed of work piece (r/min) 30-500 stepless speed regulation
    Rotating speed of grinding wheel (r/min) 2000-10000 stepless speed regulation
    Motor power of workpiece(kw) 4
    Motor power of grinding wheel(kw) 5.5
    Motor power of X-axis servo motor(kw) 2
    Motor power of Z-axis servo motor(kw) 4
    The power of oil pressure motor (kw) 0.55
    Cooling motor power (kw) 0.09×2
    Rated power(kw) 17.8
    Maximum speed of workbench m/min 6
    Grinding speed m/min 0-4
    Feed speed of grinding wheel m/min 5
    X-axis minimum resolution mm 0.001
    Z-axis minimum resolution mm 0.001
    Maximum load capacity of workpiece (kg) 300
    Flow of cooling pump(L/min)
    200
    The pressure of hydraulic system (MPa) 0.4
    Flow of oil pump(L/min) 25
    The weight of machine tools(kg)
    6800
    Machine overall dimension(mm)
    4000×1900×2000
    Machining precision Roundness of internal hole(μm) 3
    Cylindricity of internal hole(μm) 5
    Surface roughness of internal hole(μm) Ra0.63
    Roughness of end face(μm) Ra0.8

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