MODEL
CG : 260 / 350
PRECISION
CYLINDRICAL GRINDING MACHINE
In
technical collaboration with CMTI, Banglore (Central
Manufacturing Technology Institute)
These machines
are capable to achieve a very high degree of accuracy
of roundness and cylindricity on job. They are suitable
for tool room and production jobs to carry out cylindrical,
face and internal grinding opeartions.
These machines
are classified in three different versions as stated
below having 260 mm or 350mm maximum swing over table
:-
UCG : UNIVERSAL
CYLINDRICAL GRINDER
ECG : EXTERNAL CYLINDRICAL GRINDER
ICG : INTERNAL CYLINDRICAL GRINDER
Automatic
Grinding Cycle:
The automatic grinding cycle has Rapid approach –
Coarse feed – Fine feed – Sparkout and rapid retraction
of the wheelhead and the infeed handwheel to the preselected
position. The cycle also controls START/STOP of workhead
motor, coolant motor and table reciprocation. In the
case of long job, the termination of grinding cycle
is selectable either at Left, Right or at Any position
of the reciprocation table. While internal grinding
cycle is on, wheel side always remains in retracted
position.
The total amount
of Infeed and Fine feed as well as Feed rate of Coarse
and Fine feed are selectable. There is optional arrangement
to equip the cycle with an In-Process guaging device
for direct measurement during grinding.
Infeed
System:
The infeed is operated
by precision ground cam. The movement of infeed slide
(Wheel slide) is based on hardened, ground and preloaded
roller guideways which guarantees stick-slip free
movement and exceptionally fine repetitive accuracy
+ 1 micron. The plunge grinding at any desired
approach angle upto 45o degree can be done.
Single liver operates
the complete grinding cycle. Considering work piece
requirement, there is wide scope to select proper
grinding cycle i.e.
- Plunge
- Traverse with infeed on L.H.S
- Traverse with infeed on R.H.S
- Traverse with infeed on both
ends (L.H.S & R.H.S)
Workhead:
The machine has
a rigid workhead spindle which runs in hydro-dynamic
multi-point bearings. The design of workhead is of
catridge type. Very high roundness accuracy is the
distinctive achievement obtained through the workhead.
While either live spindle grinding or between centre
grinding on universal swivelling workhead.
Wheelhead:
The
wheelhead spindle runs in high precision multi-point
hydro-dynamic bearings to achieve very high rigidity
and excellent surface finish. The design of wheelhead
is of catridge type. The wheel slide can be swivelled
through + 45o degree.
Angular
Wheelhead:
It is an optional
characteristic of inclined feed, whee is mounted on
the right hand side to get the grinding of diameter
and face at a time.
Tailstock:
The tailstock is designed for high rigidity. The
facilities such as Fine taper setting of + 20 microns
and hydraulic tailstock actuation are optionally provided.
Hydraulic/Electrical
System:
The hydraulic
power pack is equipped with solinoid valve, hydraulic
pump and motor etc., which is located outside the
machine to avoid vibration and thermal distortion.
The electric controls cabinet is also housed outside
the machine for easy maintenance.
Swivel
Table:
Table is arranged
to swivel for taper grinding. For fine corrections
to be applied by the screw adjustment.
Internal
Grinding Attachment:
The hinged type
Internal Grinding Attachment with its independent
motor is conveniently located on the wheelhead. It
has fast grinding action and it can be quickly swung
into a grinding position. The work piece can be externally
and internally ground in one setting. Taper hole can
be ground by swivelling either workhead or table.
There are so many standard and
special accessories that can be added to the machine
as per requirement.
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