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ROLLER 2800 CNC

KOVOSVIT ROLLER 2800 CNC Special technologies

The special ROLLER 2800 CNC is the skeleton of the machine
and is derived from the standard MASTURN 70/3000 CNC lathe
machine. The function is based on cold moulding technology:
the rolling of cylindrical, conical and transition radius areas of
shaft parts, i.e. vehicle axles. This function, along with others,
pre-determines the area of the use of the machine for the
specialized production of parts for use in surface fi xation
technology in a perpendicular direction of the rolling tool to the
surface of the material by means of a mechanism for tilting axis
B by the CNC system.
Form rolling equipment is located on the longitudinal saddle.
The saddle moves by means of a CNC controlled axis Z on the
bed of the machine in a longitudinal direction. The movement
in axis X is performed hydraulically by two opposite located
tailstock sleeves for the rolling heads, into which the rolling
tools are clamped. Fluent changes to pressure on the rolling
tools can be changed in the program during the working cycle.
The system enables the indirect independent measurement of
the rolling force and the recording and archiving of data from
the rolling process.
The arrestment of turning the rolling heads in the respective
position is ensured by a drive using self-locking worm gears.
Swing dia. without using of tilting B-axes: 300 mm
Max. power of multi-roller without using of tilting B-axes: 50 kN
Max. workpiece weight: 1 000 Kg
Output S1: 11 kW

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    • Cold moulding technology – compaction of material
    • The skeleton of a special machine is derived from the standard MT 70/3000 CNC lathe machine.
    • The function is based on cold moulding technology – rolling of cylindrical, conical and transition radius areas of the shaft parts, i.e. vehicle axles.
    • The use of the machine for specialized production of parts using surface rolling technology.
    • The form rolling equipment is located on the longitudinal saddle.
    • The saddle moves by means of CNC controlled axis Z on the bed of the machine in a longitudinal direction.
    • The motion in axis X is performed by tailstock sleeves of rolling heads into which the rolling tools are clamped.
    • The tailstock sleeve movement and the rolling force are performed hydraulically.
    • The machine is equipped with hydraulic aggregate in the standard variant.
    • Fluent changes in the pressure and the force on the rolling tools during the work cycle in a defi ned pressure scope.
    • Indirect independent measurement of the rolling force; recording and archiving.
    • Tailstock with hydraulically tailstock sleeve is equipped with special mechanical arrestment equipment for the safe transfer of axial forces.
    • The headstock is placed on the bed on the reinforced centre.
    • Independent oil management, including the tank and the tube under the work area of the machine.
    • The whole rolling saddle system is integrated into the covered area of the machine.
    • Sliding guiding areas for additional rolling saddle are connected to the central lubrication system of the machine.
    • The machine can be operated in manual and automatic cycles.

    The advantage of a rolled surface is based on achieving a smooth surface by cold moulding the surface layer. With the quality of the tooling it replaces grinding technology, although without

    the precision of the dimension of the machined area when grinding. Rolling is recommended as a fi nishing operations for the strengthening of surfaces of non-tolerated dimensions or as technology for strengthening the surface layer before the finishing grinding of areas for tolerated dimensions.

    Working space lighting
    Röhm 116 Mk6 (604H) movable centre
    Calibrating load gauge
    Adaptor into spindle Metric 112/Mo 6
    Carrier
    Lubrication of pulleys
    Tube for lubrication oil for rolling oil
    Tool kit
    Accompanying documentation
    The machine is equipped in standard with SIEMENS 840 D system

    Lifting equipment 3000
    Switch board cooling – air-condition
    Adapter
    Rolling holder (2 pc set)
    Pulleys on request (2 pc set)
    Remote diagnostics
    Special movable centre

    1. The working space of the machine where in the fi rst row there are distances and dimensions concerning the clamping of the shaft, the so called spindle clamper, the distance of the clamper face from the face area of the spindle 275 mm, starting the tailstock of the machine (related to the distances of the inserted tailstock sleeve from the face of the spindle, i.e. 3412 mm,  size of the expansion of the tailstock 160 mm and the distance of the movablecentre tool (in this case Röhm MK6 VEL.116 – Id.Nr.093439 centre) from the face of the tailstock sleeve 192mm. The total distance between pins is then 2876-2906 mm depending on the form and the size of the centric axle pit. In addition, in the work space there is an indication of the starting support with rolling rolls with the distance only to the face of the spindle and the face of the inserted tailstock sleeve; there is also angular deviation of the rolling tailstock sleeves (±35 degrees), the position of the centre where the tilting is performed, i.e. 290 mm and the value of the distance of the faces of the inserted tailstock sleeves for the rolling heads 522 mm and the expansion of each tailstock sleeves 112 mm. Most dimensions are stated to the face of the spindle, the face of the tailstock sleeve and the faces of the tailstock sleeves of the rolling heads, because the independent clamping device into the spindle, the centre into the tailstock and the rolling tools are selected and constructed especially according to the requirements of the client and their values may differ.
    2. Maximum clearance of the part without tilting the rolling heads.

     
    TECHNICAL DATA Roller 2800 CNC
    Geometric and operating accuracy ISO 1708
    Swing dia. without using of tilting B-axes mm 300
    Swing dia. with using of tilting B-axes to ± 30° mm 280
    Swing dia. with using of tilting B-axes to ± 35° mm 250
    Tailstock sleeve travel of multi-roller headstock mm 112
    Range of multi-roller power kN 1 – 50
    Max. power of multi-roller with using of tilting B-axes (B = ± 35°) kN 20
    Max. power of multi-roller without using of tilting B-axes (B = 0°) kN 50
    Distance between centres mm 2876
    Max. workpiece weight kg 1000
    Operating spindle
    Nose of spindle (DIN 55027, 55029) – B11/C11
    Spindle bore mm 106
    Spindle taper – metric mm 112
    Control system
    SIEMENS SINUMERIK – 840D
    Main drive
    Drive motor output (S1) kW 11
    Max. spindle torque (S1) Nm 297,5
    Spindle speed range min-1 0-400
    Axis B
    Ratio of worm-gear unit – 01:40
    Ratio of spur gearing of tilting mechanism – 01:12
    Tilting range ° ± 35
    Rapid traverse min-1 0-400
    Axis Z
    Ball screw – dia. / increase mm 50/10
    Travel mm 2876
    Rapid traverse m/min 10
    Max. feed force kN 20
    Repeatability of positioning mm 0,015
    Tailstock
    Tailstock sleeve dia. mm 115
    Tailstock sleeve travel mm 160
    Sleeve taper MORSE 6
    Hydraulic aggregate
    Hydraulic oil volume l 10
    Operating pressure of pump bar 110
    Nominal capacity of pump l/min 11
    Nominal motor output kW 3
    Lubrication of multi-roller tools
    Nominal pressure of pump bar 3
    Nominal capacity of pump l/min 0,9
    Tank capacity l 32
    Pump motor rating kW 0,05
    Machine dimensions
    Length × width × height mm 4000 x 1815 x 1863
    Machine weight kg 6200
    Max. total machine input
    Machine input kVA 30
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