Vertical CNC Precision Grinding Center

KMT LIDKÖPPING VGG 4000

Processing diameter: 4,200 mm
Processing height: 550 mm

Diameter of magnetic chuck: 4,000 mm
Max. speed of rotary table: 13 min-1

Control system: SIEMENS SINUMERIK 840D PL

RIGHT GRINDING HEAD
Swiveling range, outer: 50°
Swiveling range, inner: 47°
Max. grinding wheel diameter: 610 mm
Max. grinding wheel height: 255 mm
Max. workpiece height: 550 mm
Travel - X: 2,820 mm
Travel - Z: 820 mm
Rapid traverse X + Z axes: 10,000 mm/min

LEFT GRINDING HEAD
Max. grinding wheel diameter: 610 mm
Max. grinding wheel height: 255 mm
Max. workpiece height: 540 mm
Travel - U: 2,870 mm
Travel - W: 790 mm
Rapid traverse U + W axes: 10,000 mm/min

GRINDING WHEEL MAGAZINE
Right magazine: Quantity: 5
Left magazine, Quantity: 4

DIMENSIONS AND WEIGHTS
Operating platform height: approx. 2,605 mm
Machine weight: approx. 143,000 kg
Machine dimensions (L x W x H): approx. 13,400 x 8,945 x 4,250 mm

ACCESSORIES
- Automatic grinding wheel changer, left side (4 wheels) & right side (5 wheels)
- Automatic dressing unit for both grinding heads, MARPOSS P7
- Various grinding wheels and arbors
- Oil mist and emulsion extraction system
Gedpszumunjfx Apieka
- Automatic balancing device
- Hydrostatic guidance in all machining axes

DESCRIPTION
The machine is in exceptionally good condition and has been used exclusively for the highly precise final machining of large bearings for offshore wind turbines. The machining scope included grinding the inner and outer diameters as well as the highly precise raceways of the rolling bearings.
The machining results achieved demonstrate the machine's outstanding performance. Inner and outer diameters with a workpiece diameter of up to 4,000 mm were ground within a tolerance of ±20 µm. A profile accuracy of 2–3 µm was achieved for the raceways.

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