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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





  • 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 DATARoller 2800 CNC
Geometric and operating accuracyISO 1708
Swing dia. without using of tilting B-axesmm300
Swing dia. with using of tilting B-axes to ± 30°mm280
Swing dia. with using of tilting B-axes to ± 35°mm250
Tailstock sleeve travel of multi-roller headstockmm112
Range of multi-roller powerkN1 – 50
Max. power of multi-roller with using of tilting B-axes (B = ± 35°)kN20
Max. power of multi-roller without using of tilting B-axes (B = 0°)kN50
Distance between centresmm2876
Max. workpiece weightkg1000
Operating spindle
Nose of spindle (DIN 55027, 55029)B11/C11
Spindle boremm106
Spindle taper – metricmm112
Control system
SIEMENS SINUMERIK840D
Main drive
Drive motor output (S1)kW11
Max. spindle torque (S1)Nm297,5
Spindle speed rangemin-10-400
Axis B
Ratio of worm-gear unit01:40
Ratio of spur gearing of tilting mechanism01:12
Tilting range°± 35
Rapid traversemin-10-400
Axis Z
Ball screw – dia. / increasemm50/10
Travelmm2876
Rapid traversem/min10
Max. feed forcekN20
Repeatability of positioningmm0,015
Tailstock
Tailstock sleeve dia.mm115
Tailstock sleeve travelmm160
Sleeve taperMORSE6
Hydraulic aggregate
Hydraulic oil volumel10
Operating pressure of pumpbar110
Nominal capacity of pumpl/min11
Nominal motor outputkW3
Lubrication of multi-roller tools
Nominal pressure of pumpbar3
Nominal capacity of pumpl/min0,9
Tank capacityl32
Pump motor ratingkW0,05
Machine dimensions
Length × width × heightmm4000 x 1815 x 1863
Machine weightkg6200
Max. total machine input
Machine inputkVA30