| Description: |
Internal and Face Grinding Machine ROBBI IGR 250
machine nouvelle
internal diameter:250 mm
swing diameter:455 mm
workpiece
length - max.:1200 mm
table rotating:-4/+8 °
table
speeds:0-4000 mm/min
max. workpiece weight:80 kg
workhead -
center taper:5 MK
Rotation speed of workhead :0 - 400
1/min
workhead motor:4 kw
3-jaw chuck:250 (selbstschließend)
mm
grinding motor:4 kW
coolant pump:2,2 kW
Weight
approx.:2,4 t
machine dimensions:3200 x 2100 mm
CNC
controller:Siemens 840 D oder SPS von Siemens
autom. sensing
device for grinding wheel:Option
linear scales and ballscrew:in
allen Achsen
face grinding attachement:Durchmesser 125
mm
clamping chuck:250 (selbstschließend), 1 Satz harte Backen, 1
Satz weiche Backen, 1 Satz Innen mm
frequency control main spindel
engine:für die Innenschleifeinrichtung
internal grinding
spindle:RPM 28.000, diam. 60 mm. Min. diam. cap. 25 mm. x Bohrung 50
mm, Max. diam. cap. 100 mm. x Bohrung 115 mm .
internal grinding
spindle:RPM 10.000, diam. 100 mm, Min. diam. cap. 50 mm x Bohrung 100
mm, Max.diam. cap. 250 mm xBohrung 220 mm
fixed steady
rests:10-100 mm, 100-170 mm
PERFORMANCE AND PRECISION
DEGREE
Robbi grinding machines are according to the
international precision normes ISO 2433.
The table movement
linearity is guaranteed by a max. deviation of 0,002
mm/mt.
The obtainable grinding roundness is : 0,4m
()
() for a test workpiece ground in our factory during
machine testing
The CNC controls :
Wheel head movement (AXIS X)
Longitudinal table movement
(AXIS Z)
Work head spindle rotation speed
The available
programs permit the programming of the following grinding cycles
Plunge
Cylindrical pass
Cylindrical pass with
interpolation between table and wheel movement to grind taper
workpieces
Radius
The software for the workpiece
grinding operation is very simple and intuitive. To facilitate the
programming the software is equipped with an exemplifying graphics, to
input the data for each parameter. The software, has been
specially studied, so as to permit also non specialised operators to
programme without any problems complex workpieces.
When the
workpiece grinding programme has been completed the CNC will
automatically make up a summary list, where only the geometric
parameters are evidenced. This list permits with a glance to
verify the complete programme; this operation is very helpful to
verify eventual input data errors or to check rapidly a workpiece
programme when reloaded from the file.
While the
programme is in execution, it is possible to intervene and modify in
real time the technologic parameters, such as: increments, dwell
inversion times, sparkout passes. Also, it is possible to intervene
with the jog handwheel.
The Grinding Machine
is composed of :
BASE
Structure in normalised and
stabilised cast iron with large ground guides. The lubrication
plant supplies a constant oil flow distributed over the complete
length of the guides. In the middle of the base, there is
positioned the ball screw for the table longitudinal movement. On
all the lower part of the perimeter are situated the recesses for
machine levelling. Considering the base structure, usually a
foundation is not required.
TABLE
The table is
manufactured in two parts, both are in normalised and stabilised cast
iron.
The lower part is composed of wide guides which are
ground and accurately hand scrapped, for a better sliding. The
upper part, is swivelable in the two directions, suitable for grinding
tapered workpieces. It includes a micrometric device with
centesimal dial gauge for taper control.
WORKHEAD
The structure in normalised, stabilised and well ribbed cast
iron, allows to support the workpiece weight and the force generated
by the grinding operation. The spindle rotates on high precision
ball bearings, guaranteeing restricted tolerance and maximum rigidity
in the working. The spindle rotation is by means of a three phase
motor with variable speed controlled by an inverter.
INTERNAL
GRINDING SPINDLE CARRIAGE
The structure is composed of a
carriage, where the internal grinding spindle is located. The
working feed, is obtained by a re-circulating ball screw and preloaded
nut. The screw movement is assured by a brushless motor. The
incremental optic rule guarantees a wheelhead positioning precision of
0,001 mm.
INTERNAL GRINDING SPINDLE
As there are many
and various types of Internal Grinding Spindles, according to the
diameters and lengths that need to be ground, the machine is supplied
without an internal grinding spindle, so that the customer may select
which type is more suitable for his job. The machine is G4932403
manufactured standard with a belt transmission suitable for diam. mm.
60, diam. mm. 80 and diam. mm. 100 internal grinding spindles. On
request, high frequency spindles may be assembled.
WHEELHEAD FOR FACE GRINDING
The structure is composed
of a carriage, where the face grinding device is located. The
positioning is obtained by an hydraulic cylinder. The diamond
dressing device is assembled on the face grinding device casing.
MANUAL FEED HANDWHEELS
Electronic type, with double
selection of the increments division 0.1 - 0.01 and 0.001 mm. for
wheelhead and table movements.
DIAMOND DRESSER
The
internal diamond dressing device is very strong and is positioned on
the table. It starts hydraulically, when the dressing operation
is selected, by the operator. The dressing operation may be
carried out manually or in automatic cycle.
EQUIPMENT AND
ELECTRICAL PLANT
In a cooled cabinet, separate from the machine.
HYDRAULIC PLANT
The hydraulic power pack, is
separate from the machine and activates the hydraulic diamond dresser
and face grinding device.
LUBRICATION PLANT
The
lubrication power pack, is separate from the machine and supplies
continuous oil to the wheelhead guides. The recovered oil is
filtered and then resent to the power pack.
The re-circulating
ball screw nut for the working feed, is grease lubricated.
COOLANT PLANT
Large capacity tank for the coolant water,
complete with electric equipment. Equipped with coolant magnet
cleaner and coolant paper roll cleaner.
PROTECTIONS
For the protection of the operator all movable parts are covered
with suitable guards. Precisely: protection casing for belts,
protection casing for grinding wheel and bellows for guides. The
machine is completely closed and the front protection is a sheet
sliding doors with poly-carbonate shields. A safety device, does not
permit the automatic cycle to start if the front sliding doors are
open.
seller offer No. resale 1124-93805
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