+ 91 - 22 - 28516201
+ 91 - 22 - 67237804
HORIZONTAL SPINDLE
DOUBLE DISC GRINDER
THE
RUGGED - ROBUST - RELIABLE
WORK HORSE
RUGGED - ROBUST - RELIABLE
WORK HORSE
PRINCIPLE OF OPERATION
Double Disc Grinders have been developed to grind, two parallel flat surfaces, with the help of two grinding wheel faces, opposed to each other. The workpiece is advanced between the wheels by various methods, either free floating, or clamped, depending on the shapes, sizes, quantities as well as the stock removals required.
1
ADVANTAGES COMPARED TO CONVENTIONAL, FLAT SURFACE GRINDERS
High Production rate
High Parallelism
Heavy stock removals
Close tolerances
Better surface finish
Easy accessibility
Low down time
Low operating costs
Facilitates easy automation
Suitable for ferrous & non ferrous materials
Thin components can be ground without damaging them
Gradual stock removal throughout the work path across the grinding wheels, permits heavy stock removal, in a single pass
INDICATIVE LIST OF COMPONENTS THAT CAN BE GROUND
Alnico magnets
Flat ground steel or metal bars
Blanking Dies
Ferrite magnets
Bearing Rings/Rollers/Needles
Hammers
Brake Linings
HSS Toolbits
Bricks
Hard Disc Drive components
Carbide Tips/inserts
Hand tools - pliers, spanners
Castings
Keys
Ceramic Seals
Machine knives
Connecting rods
Piston rings
Circlips
Propeller shafts forks
Circular segmented saws
Piston pins
Circular Knives
Pump components/valves
Clutch plates
Press - tool dies
Carbon brushes
Striker forks
Compressor valve Plates
Spring ends
Crank cases
Segmented grinding blocks
Ceramic seals
Screw driver ends
Cylinder blocks
Thrust washers
Engine valves
Universal joint spiders
Engineers' Files
CONSTRUCTIONAL FEATURES OF THE BASIC MACHINE
BASE
Welded and stress relieved silicon steel base with cross ribbings to provide a balanced compensation for thermal expansions. Rigid construction to absorb vibrations. The base is precision machined in a single setting to achieve necessary accuracies.
SLIDE WAYS
Axially sliding wheel heads, glide on V-shaped needle cages Linear Guide Systems, for highly accurate feeding of wheel heads, without any stick and slip.
SPINDLES & HOUSING
SPINDLE SHAFTS
Heat treated for toughness, dynamically balanced and ground spindle shafts, ensure distortion - free operations, over prolonged usage. These hollow spindle shafts have a rotary joint to allow coolant flow to the centre of grinding wheels, for efficient cooling of wheels and work pieces.
SPINDLE HOUSINGS
Shafts are housed in a robust steel housing and mounted on pre-loaded matched pair of super precision angular contact ball bearings which are lubricated for life.
SPINDLE SWIVEL
Both, vertically and horizontally adjustable spindle bushings allow the spindles to be swiveled according to need.
SPINDLE FEED
Rigid, ground and nitrided lead screws driven by a worm and worm-wheel, ensure rapid and precise micro
displacements of the spindles. These are operated by motors or manually.
DRESSING DEVICE
Rigidly mounted on precision ground mating surfaces, the dresser is coupled to a variable speed reversible Hydraulic Cylinder and limit switches, which provides a smooth movement for chatter-free dressing of individual, or both wheels, simultaneously.
SAFETY GUARD
A robust compartment enclosing the grinding wheels, guards the machine and the operator against the unlikely event of wheel breakage or disengagement.
FLANGES
Spindles are provided with precision flanges to accommodate nut-inserted grinding wheels.
COOLING & FILTRATION SYSTEMS
An adequate capacity coolant tank and pump, feed the hollow spindles as well as the hose assembly, which forces coolant directly between the wheels.
Outlets of these systems empty back into the tank, which houses the sedimentation system comprising of various levels, baffles and meshes, to effectively cool and filter the coolant. Special filtering systems are offered as an option.
Outlets of these systems empty back into the tank, which houses the sedimentation system comprising of various levels, baffles and meshes, to effectively cool and filter the coolant. Special filtering systems are offered as an option.
WORK-PIECE FEEDERS
THROUGH-FEED
Work-pieces are fed between two guide rails, one on top of the other, by means of a belt, chain or roller system. The workpiece path between the guide rails, is a straight line. The gives the highest rate of
output.
ROTARY-FEED
Work-pieces are fed between the grinding wheels, on a rotating carrier, and they trace an arc between the wheels. The carrier supports and guides the pieces, within the grinding zone. The carrier is driven by a variable speed drive motor. This gives the second highest rate of output.
RECIPROCATING/OSCILLATING FEED
Work-pieces are supported and guided in an arm-like carrier, which either reciprocates, or oscillates between the grinding wheels. Ensures very close, dimensional tolerances and is particularly suited, where relative size, within the work-piece needs to be maintained. Also suited for large and odd shaped work-pieces.
This gives the lowest rate of output.
This gives the lowest rate of output.
KINEMATIC DESIGN
Close grinding tolerances are obtained by minimizing the deflection created due to heavy grinding forces. A special design resolves these forces along the axis of the spindles. One of these special design features is to locate the centre of the wheel-head slides, and the spindles' axis at the same
level.
LOW CENTER OF GRAVITY
Care is taken to keep the centre of gravity of the machines, at the lowest level, making the machine extremely stable. It reduces vibrations and increases rigidity.
CONTROL PANEL
Dust-free, stand alone control panels house power and control systems with indicators, meters, DRO's, switches, variable speed drives etc. The cables leading to the machine are carried in an overhead conduit, thereby ensuring no hindrance around the machine.
OPTIONAL FEATURES
The following optional features are offered on request or need:
Wheel wear indication
Wheel wear compensation
Pre process/post process measurement of work pieces
Electronic variable speed drives to vary the peripheral speeds of one or both the wheels, work-piece feeder unit.
Digital readout (DRO) for micro feeding of spindles in accuracies of 1,5, or 10 microns
Magnetic separator and 5 micron filter element system
Automatic loading and unloading devices
MODEL
GRINDING WHEEL
DIA
mm
DIA
mm
POWER PER
SPINDLE
KW
SPINDLE
KW
SPINDLE
STROKE
mm
STROKE
mm
WEIGHT APPROX
Kg
GRINDING RANGE
THICKNESS mm
DIA/L
mm
DDG-300
DDG-300 HD
DDG-300 HD
300
7
12
12
70
2000
2500
2500
0.8-20
5-25
5-40
5-40
DDG-400
DDG-400 HD
DDG-400 HD
400
10
15
15
100
3000
3750
3750
1-50
7-50
7-75
7-75
DDG-500
DDG-500 HD
DDG-500 HD
500
15
22
22
150
4000
5000
5000
1-75
10-100
10-125
10-125
DDG-700
DDG-700 HD
DDG-700 HD
700
22
40
40
175
6000
8500
8500
2-150
15-140
15-200
15-200
DDG-900
DDG-900 HD
DDG-900 HD
900
40
50
50
200
8000
10000
10000
5-200
20-200
20-300
20-300
Note: Above Specifications are subject to change due to constant improvements.
HOW AMOLIK PRECISION MACHINE'S DOUBLE DISC GRINDER IS DIFFERENT?
To answer this all important question, one must delve deeper into the history of the promoters. They were the first in India, to design and develop these machines indigenously, in 1982. Since then, they have been continuously engaged in carrying out grinding operations on this machine, for various vendors of highly reputed OEM's, such as Maruti, Telco, Mahindras, Godrej, Bajaj Auto, Tandon Corporation etc. as well as a host of other applications, numbering over 200 different components. Same of them are shown on page 2 of this brochure.
This has resulted in acquiring a vast and enriching experience of grinding a widest possible range of components, from spring steel to bearing steel, copper to aluminium to brass, stainless steel, ceramics, carbon, alnico & ferrites. All of them ground successfully, in large quantities since 1982. The experience has provided the promoters with deep insight into the grinding processes, to solve all kinds of problems, and offer solutions for the best possible outputs for all applications.
THIS RICH & VARIED EXPERIENCE HAS GONE INTO THE DESIGNING OF THESE MACHINES, which is an advantage that can hardly be matched by any manufacturer of these machines, in the world.
This has resulted in acquiring a vast and enriching experience of grinding a widest possible range of components, from spring steel to bearing steel, copper to aluminium to brass, stainless steel, ceramics, carbon, alnico & ferrites. All of them ground successfully, in large quantities since 1982. The experience has provided the promoters with deep insight into the grinding processes, to solve all kinds of problems, and offer solutions for the best possible outputs for all applications.
THIS RICH & VARIED EXPERIENCE HAS GONE INTO THE DESIGNING OF THESE MACHINES, which is an advantage that can hardly be matched by any manufacturer of these machines, in the world.
Amolik Precision Machines
50, Bindal Industrial Estate, Lathia Rubber Lane, Saki Naka, Andheri (E), Mumbai-400 072. India.
< Tel. : 91-22-28516201 > < Fax : 91-22-67237804 >
E-mail : amolikmachines@gmail.com
Website : www.amolik.com
50, Bindal Industrial Estate, Lathia Rubber Lane, Saki Naka, Andheri (E), Mumbai-400 072. India.
< Tel. : 91-22-28516201 > < Fax : 91-22-67237804 >
E-mail : amolikmachines@gmail.com
Website : www.amolik.com
© 2011 AMOLIK PRECISION MACHINES . All Rights Reserved
