OPERATING MANUAL
FOR
CORE CUTTING MACHINE
ASTM-D-2113-83
CONTENTS:
INTRODUCTION
APPARATUS
PROCEDURE
RESULT
MAINTENANCE
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APPARATUS
:
1. CORE CUTTING MACHINE
A. MOTORISED MODEL WITH WATER TANK.
B. DIESEL ENGINE OPERATED.
C. PETROL-CUM-KEROSENE OPERATED.
2. WEIGHT - 4 NOS.
3. OPERATING MANUAL
4. TOOLS FOR ENGINE
INTRODUCTION : These
machines are used for diamond core drilling to secure core samples of rock,
bituminous material and soil which are too hard to sample by soil sampling
method. This equipment help us to
obtain core specimens of superior
quality that reflects the insitu condition of the material and structure which
are suitable for standard physical properties test and structural integrity
determination.
'HT' Drilling Machines are used for coring of slabs,
blocks and cores from hard rock, concrete and bituminous or asphalt material
for preparation of laboratory samples and when formation are encountered that
are too hard to be sampled by soil sampling method. 'HT' drilling machines are very sturdy,
better in finish, easy for operation, in maintenance and vibration free. This machines are provide with wheel for easy
mobility.
Models available are motor driven, engine driven
(diesel or petrol and petrol-cum-kerosene)
'HT' 2760 Drilling Machine with 2 HP motor for
2" x 2" cutting specimen complete with coolant pump (for motor driven
model) with water tank and pipe.
Weights (4 nos.) of 25 kg each.
ACCESSORIES :
Diamond impregnated core bit of 100mm to 200mm
Barrel size 200mm to 750mm
'HT' 2760 A Same as above but with 3 HP motor for
upto 3" x 3" cutting specimen
'HT" 2760 B Same as above but with 5 HP motor
for upto 4" x 4" cutting specimen
'HT' 2760 C Same as above but with 7 HP motor upto
6" x 6" cutting specimen.
'HT' 2760 D Same as above diesel engine driven power
unit. H.P. 5.5 make Greaves.
'HT' 2760 E Same as above diesel engine drive power unit. H.P. 7.2 make
Greaves.
'HT' 2760 F Same as above but with
Petrol-cum-Kerosene drive unit. H.P. 5.5 make Greaves.
CORE BARRELS :
1. Single tube type, WG design
of any other design as require.
For Ex core bits
(I.D.0.845") x 300mm long
For AX core bits
(I.D.1.185") x 350mm long
For BX core bits (I.D.1.655")
x 400mm long
For NX core bits
(I.D.2.155") x 450mm long
2. Double tube type, WG design.
3. Double tube, swivel type, WT
design.
4. Double tube swivel type MM
design.
5. Double tube, swivel type
large diameter.
6. Double tube, swivel type,
Retrievable inner tube.
7. Longitudinal split inner
tubes.
CORE BITS :
1. Surface set core bits.
2. Carbide bits.
3. Diamond impregnated bit.
"EX" core bits
(I.D.0.845")
"AX" core bits
(I.D.1.185")
"BX" core bits
(I.D.1.655")
"NX" core bits
(I.D.2.155")
Other sizes are Motor HP for above cutter
2" x2" 2
H.P.
3" x 3" 3
H.P.
4" x 4" 3
H.P.
6" x 6" 5
H.P.
DRILL RODS :
1. "E" Drill rod
2. "A" Drill rod
3. "B" Drill rod
4. "N" Drill rod
Core Bits are manufactured to international
standards viz. DCDMA, CDA, Swedish and they are also made to meet the users
special requirements. Every Bit is
designed to give maximum efficiency.
Diamond protrusion in a bit is determined by the size of diamond used. Layer diamonds are given more pronounced
protusion and smaller diamonds lesser protusion. Uniform diamond protrusion in a bit ensured
its longer life. Signaler waterways bits
are used to make it more robust. Drill
bits of special grade can also be used for drilling concrete with reinforced
steel. The wall thickness is minimized
to ensure fast penetration rate.
REAMING SHELL :
Ø Surface set
Ø Impregnated type.
CORE LIFTERS : Core
lifters of the split ring type either plain or hard faced can be used along with core lifter case or inner tube
extensions or inner tube shoe. Basket or finger type lifters to gather with necessary adopter can be used with each
core barrel.
AUXILLIARY EQUIPMENTS :
1. Roller Rock Bit.
2. Drag bits
3. Chopping bits
4. Boulder Busters
5. Fish tail bits
6. Pipe wrenches
7. Core barrel wrenches,
lubrication equipment
8. Core boxes
9. Marking devices
10.
Core splitter
11.
Road wicking
12.
Hard sieve or strainer.
PROCEDURE :
'HT' Drilling Machine are capable of providing
rotation; feed and retraction by mechanical means to the drill rod. The initial
vertical adjustment of the barrel tip can be done with the help of handle on
the left side of machine. Seat the casing
on bedrock or in a firm formation to prevent reveling of the bore hole
and to prevent loss of drilling liquid, level the surface of the rock or hard formation at the bottom of casing when
necessary. Main feed will also be given
by handle fixed in left side of the machine which is connected with main
drive gear box. Angle of cutting is
adjustable from 0-360 degree by opening
two bolts attached with gear box (motor driven). Water feeding is given by coolant pump (for
motor driven model) placed in the water tank.
Place two nos. of 25 kg in front side and two nos. weight in rear side
to balance the load and vibration free operation of cutting with core cutting
machine. Loosen the belt of engine by
loosening bolt nut of a plate in which rests.
There will be very less initial load on engine and engine can start
easily. In case of motor driven model there is no need to loosen the belt. Towing facility is provided in front of
machine . Four nos. bolt and nut are
provided to level the machine on any type of surface. Start the engine as per instruction provided
with the engine and begin the core drilling using Ex., Bx, Nx, or any size bit
approved by the engineer.
RESULT : Take out
the specimen from the barrel either by hand or by pressing the specimen from
below the barrel. Surface of the
specimen should be smooth before testing in compression testing machine.
PRECAUTIONS :
Ø Keep other person away from
the engine. Rotate the handle slowly and
slowly so that there should not be any load on the machine. Stop the machine if you found any hard
material which cannot be cut and there is too much load on machine.
Ø Proper leveling of the
machine is must before operation.
Ø Air in both try should be
proper before operation.
MAINTENANCE :
1. Always keep the machine dry,
clean and free from dust.
2. Oil the main pillar before
operation.
3. Dip diamond impregnated core
bit in nitric acid solution for three seconds to regain original position.
4. Maintain engine as per
operating manual of engine.
5. Water tank should be kept
clean and dry.
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