Tool Room & Production Machinery

POMINI CNC Roll Grinder

Model HD-425-2-7L

Siemens 840D, 12 Axes.
Built 2006.
Two flatbed system grinding and workpiece ways are separate.

Machine accuracy.
Straightness 0.001-0.002 mm/m.
Roundness 0.001-0.002 mm.
Excentricity 0.002 mm.
Profile for crown height up to 0.1 mm ±0.002 mm/m.
Surface finishing without chatter marks and no feed marks after finishing grinding stage.

On independent bed:
Auto Caliper Diameter 870 - 2.250 mm.
Eddy current crack and bruise detector probe.
Ultrasound depth Probe until 180 mm.

High Pressure wheel cleaner.
Wheel dynamic balancing electromagnetic automatically or manually.
Wheel dressing device with diamond.
2 Hydrostatic Steadies.
2 Hydrodynamic Steadies.
4 Soft landing for rools.
Wheel quick change device incl motor.
Jib crane.

Vibrations Measurement, recording on:
Headstock base
Neckrests
Footstock
Wheel head
Wheel head back
Carriage Lateral side.

Working Capacity.

Grinding length	11.000 mm
Max diameter with 1.066 mm Grinding wheel	2.200 mm
Min diameter with 1.066 mm Grinding wheel	800 mm
Center distance	11.700 mm
Max Roll weight	80 Ton
Max Roll weight with Steadies	180 Ton
Min distance between wheel center and roll axis	845 mm
Max distance between wheel center and roll axis	1.635 mm

Carriage Axis Z, Hydrostatic

Feeds, Infinitely variable	0-6.000 mm/min
Oil film thickness	0,020 mm
Distance between carriage ways	1.500 mm
Ways width	160 mm
Total length of the carriage on ways	3.385 mm

Wheelhead on Carrige Axis X, Wheel Probe Axis A, Inspektor Axis A1,

Wheelhead cross travel Ballscrew, Axis X	940 mm
Resolution axis X	0,0001 mm
Wheel Spindle length	1.695 mm
Spindle bearing, hydrostatic, diameter	254 mm
Resolution Infeed micrometer handwheel, Axes X	0,00001 mm / division
Continuous wheel infeed, U axis on radius	0 - 0,35 mm/min
Rapid wheel indeed, axes X	0-830 mm/min
Wheel motor, AC	130 kW
Wheel Speed	400-1.100-1.600 rpm
Wheel Cutting Speed	infinitely variable
Surface speed wheel diameter 1.066 mm	45 m/sec
Surface speed wheel diameter 670 mm	45 m/sec
Wheel hole, diameter	508 mm
Wheel thickness	76 - 152 mm
Wheel diameter	670 - 1.066 mm

Crowning, Axis U.

Max crown on the diameter	10 mm
Max concavity on the diameter	10 mm

Headstock

Workpiece rotating speed	5 - 50 rpm
Headstock motor	200 kW
Max transmissible torque	76,5 kNm
Faceplate control system	V Belts
Max Centre diameter, metric type	160 mm
Stroke of Quill	150 mm
Length of headstock	3.110 mm

Tail stock

Quill diameter	260 mm
Stroke of quill	750 mm
Maximum centre diameter, metric type	160 mm
Taper	Metric 5% on the diameter
Tailstock length	1.300 mm
Stroke of tailstock	8.000 mm