ALPA H-Master LB101AR User manual

MOTORIZED ROCKWELL HARDNESS TESTER LB101AR
Lingua originale: Inglese
REV. 1 - 11/19
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CONTENTS
1. BRIEF INTRODUCTION
2. TECHNICAL SPECIFICATIONS
2. SCALE, INDENTER, TEST FORCE AND APPLICABLE RANGE OF ROCKWELL HARDNESS TESTING
3. INSTALLATION OF HARDNESS TESTER
4. CORRECT USAGE OF HARDNESS TESTER
5. MAINTENANCE AND PRECAUTIONS
6. STORAGE AND SHIPPING NOTICE
DESCRIPTION
1.Panel Shell
2.Dial Gauge
3.Fastening Screw of Indenter
4.Indenter
5.Testing Anvil
6.Up and Down Lead Screw
7.Load-Change Hand Wheel
8.Rotating Wheel
9.Emergency Stop
10.Control Button
11.Back Cover
12.Upper Cover
13.Power Socket
14.Power Switch
1
10
2
4
3
5
87
12
11
9
13 14
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TECHNICAL SPECIFICATIONS
The Test Force: 98.07N (10kg); Tolerance: ± 2.0%
Total Test Force: 588.4N(60kg), 980.7N(100kg), 1471N(150Kg); Tolerance: ± 1.0%
Indenter Specication: 1)The Diamond Rockwell Indenter; 2)The φ1.5875 mm Ball Indenter
Power Source: AC220V±5%/50Hz; AC110V±5%/60Hz
Time-delayed control: 2-60 seconds, adjustable
Max. Height of the Specimen: 175 mm
Distance from the Indenter Center to the
Instrument Body: 165mm
Overall Dimension of the Tester
(Length×Width×Height): 546 x 182 x 755 mm
Net Weight of the Tester: 90kg
Allowable Tolerance of Hardness Display Value of the Hardness Tester (Table 1)
Hardness Scale Hardness Range of the
Standard Hardness Blocks
Max. Tolerance of
Hardness Display Value
HRA (20~75)HRA ±2HRA
(>75~88)HRA ±1.5HRA
HRB
(20~45)HRB ±4HRB
(>45~80)HRB ±3HRB
(>80~100)HRB ±2HRB
HRC (20~70)HRC ±1.5HRC
HRD (40~70)HRD ±2HRD
(>70~77)HRD ±1.5HRD
HRE (70~90)HRE ±2.5HRE
(>90~100)HRE ±2HRE
HRF (60~90)HRF ±3HRF
(>90~100)HRF ±2HRF
HRG
(30~50)HRG ±6HRG
(>50~75)HRG ±4.5HRG
(>75~94)HRG ±3HRG
HRH (80~100)HRH ±2HRH
HRK
(40~60)HRK ±4HRK
(>60~80)HRK ±3HRK
(>80~100)HRK ±2HRK
(Table 1)
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1. BRIEF INTRODUCTION
• Hardness is one of the important characteristics which indicate
the mechanic performance of material, while the hardness
testing is an important method to judge the quality of the metal
material or its component parts. Due to the hardness of the
metal is correspondent to its mechanic characteristics, and so
its mechanic characteristics such as the strength, tiredness,
wriggling and wearing out can be calculated out approximately
through its hardness testing.
• The Motorized Rockwell Hardness Tester is adopted a
mechanism to automatically load and unload the test force,
rotated the Load-Switch Hand Wheel to exchange test force,
therefore the operation for this instrument is very simple, easy
and prompt. Setting zero to dial, there is no man made error.
The instrument is with high sensitivity and stability, so as
suitable for usage in workshop and testing laboratory.
2. SCALE, INDENTER, TEST FORCE AND APPLICABLE
RANGE OF ROCKWELL HARDNESS TESTING
Scale Indenter Initial Test
Force Total Test Force (N) Application Range
HRA
Diamond Indenter
98.07 N
588.4 (60kg)
Hard alloy, carbide steel,
surface-quenched steel,
carburized steel sheet
HRD (10kg) Thin steel sheet,
surface-quenched steel
HRC 1471 (150kg) Quenched steel, tempered steel,
hard cast iron
HRF
Ball Indenter φ1.5875 mm
1/16 inch)
588.4 (60kg)
Cast iron, aluminum, magnesium
alloy, bearing alloy, annealed copper
alloy, mild steel sheet
HRB 980.7 (100kg) Mild steel, aluminum alloy, copper
alloy, malleable cast, annealed steel
HRG 1471 (150kg) Phosphor bronze, beryllium bronze,
malleable cast
HRH
Ball Indenter φ3.175 mm
(1/8 inch)
588.4 (60kg) Aluminum, zinc, lead, etc
HRE 980.7 (100kg) Bearing alloy, tin, hard plastic
and other soft materials
HRK 1471 (150kg)
The normal test scales of Rockwell hardness are A, B and C of
3 kinds scales
(Table 2)
PRECAUTIONS
1. Carefully read the Operation Manual before you use the
hardness tester and get to know thoroughly the operation
procedure and the usage precautions so as to avoid the
damages to the hardness tester and the safety accidents
caused by the improper operation.
2. All the bands and the anti-shock tapes should be carefully
removed before the hardness tester is installed and
calibrated.
3. The single-phase 3-pin socket should be used for the power
source of the hardness tester and the ground connecting
cable should meet the safety requirements.
4. It is strictly prohibited to tamper with the installed position
of all the electric component parts, switches, and sockets
of the hardness tester without permission, otherwise it will
cause accident.
5. It should not to turn the force knob or the Rotating Wheel
during the loading and unloading operations and the dwell
time of the test force
6. Our company tries to improve the quality of the hardness
testers and renew their structure. In case the contents in
the Operation MANUAL are a bit different with the actual
structure of the instrument, it is hoped and apologized for
the fact that the further notice will not be given.
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3. INSTALLATION OF HARDNESS TESTER
3.1 The working condition of the hardness tester
3.1.1 Under the room temperature between 10~30°C;
3.1.2 The relative humidity in the test room shall not be over 65%;
3.1.3 In an environment free from vibration and shock; without
corrosive in surroundings.
3.2 THE UNPACKING OF THE HARDNESS TESTER
3.2.1 Cut the belts on packing box, loosen off the screws at
bottom of packing box, remove the upper body of packing box,
and take out accessories kit.
3.2.2 Unscrew two (2) M10 outer hexagonal bolts under the
bottom plate with a spanner, to separate the hardness tester
from the bottom plate.
3.2.3 After unpacking, the hardness tester shall be placed on a
stable working table horizontally, with horizontal
deviation less than 1mm/m. A hole shall be drilled at an
appropriate location on the working table (see Fig.1) to enable
the Up and Down Lead Screw to operate properly. We suggest
the height of working table should be about 500 mm.
Fig. 1
Fig. 2
3.3 THE PLACEMENT OF THE HARDNESS TESTER
After the hardness tester is properly placed, open the Upper
Cover (12) and the Back Cover (11). Untie the fastening rubber
tape on the Connecting Rod (22) (Fig.5), and draw out the
foam block under the Protecting Gasket (25) and Lever (15).
Untie all the white gauzes bands on moving parts and then
recover the Upper Cover and Backer Cover to keep away dust.
3.4 THE INSTALLATION OF THE WEIGHT GROUP
3.4.1 During installation of weights, the instrument should be in
the state without any test force.
3.4.2 Take the weight group out of the accessories kit and
clean them thoroughly. Rotate the Load-Change Hand Wheel
(7) to the place number 588.4, then take out the Hanging
Rod (16) from the Back Cover and insert it into the hole of
Weight A (20), fasten the Nut (21) at the tail of the Hanging
Rod. Hook the Hanging Rod in the ear of the tail of the Lever.
Place the Weight B (19) and Weight C (18) separately on two
Fork-Shaped Frames (15), then rotate the Load-Change Hand
Wheel clockwise for a whole cycle and observe the round pegs
on both sides of the weight and see if they are properly placed
in the groove of the Fork-Shaped Frame. The weights should
be in center and should not touch with any component in inside
wall of the instrument body.
15.Lever
16.Hanging Pole
17.Supporting Fork
18.Set of Weights C
19.Set of Weights B
20.Set of Weights A
21.Nut
Fig. 3
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3.5 THE TEST FORCE SELECTED IN CORRESPONDENCE
WITH THE WEIGHT (TABLE 3)
Scale Test Force(N) Graduated Value on The Load-switch Hand Wheel Force on the Weight (Weight Code)
HRA 588.4(60kg) 588.4
(60) Hanging Rod + Weight A
HRB 980.7(100kg) 980.7
(100) Hanging Rod + Weight A +Weight B
HRC 1471(150kg) 1471
(150)
Hanging Rod + Weight A +
Weight B + Weight C
(Table 3)
4. CORRECT USAGE OF HARDNESS TESTER
4.1 Do all the preparatory work before the Use
4.1.1 The surface of the specimen should be smooth and
clean without any feculence, oxidized peels, concaves, and
the outstanding processing signs. The supporting plane of
specimen and testing table should be clean to assure a good
smoothness between them.
4.1.2 The Min. thickness of the specimen should be superior
to 10 times depth of the indentation. After the test, the back of
the specimen should not have any visible signs of deformation
(Fig.4).
4.1.3 The specimen should be stably placed on the testing table.
Fig. 4
There should be no any movement of the specimen during the
loading and unload of test force and the test force should be
loaded perpendicularly on the specimen.
4.1.4 The testing table should be chosen according to the
shape and size of the specimen. If the specimen has irregular
shape, a special holder should be made accordance with the
particular geometrical shape, so as to measure out correct
hardness displaying value.
4.1.5 When the specimen is columned in shape, the V-shaped
testing table must be used. When the diameter of specimen is
less 38 (25) mm, the results of the test should be revised. The
revised values are all positive values.
The revised values of Rockwell hardness scale for column
specimen are as table 4 (Table 4).
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Hardness
Value HR
Diameter (mm) of the Columned Specimen
6 10 13 16 19 22 25 32 38
Revised Value of Rockwell Scales A, C, D (HR)
20 2.5 2.0 1.5 1.5 1.0 1.0
25 3.0 2.5 2.0 1.5 1.0 1.0 1.0
30 2.5 2.0 1.5 1.5 1.0 1.0 0.5
35 3.0 2.0 1.5 1.5 1.0 1.0 0.5 0.5
40 2.5 2.0 1.5 1.0 1.0 1.0 0.5 0.5
45 3.0 2.0 1.5 1.0 1.0 1.0 0.5 0.5 0.5
50 2.5 2.0 1.5 1.0 1.0 0.5 0.5 0.5 0.5
55 2.0 1.5 1.0 1.0 0.5 0.5 0.5 0.5 0
60 1.5 1.0 1.0 0.5 0.5 0.5 0.5 0 0
65 1.5 1.0 1.0 0.5 0.5 0.5 0.5 0 0
70 1.0 1.0 0.5 0.5 0.5 0.5 0.5 0 0
75 1.0 0.5 0.5 0.5 0.5 0.5 0 0 0
80 0.5 0.5 0.5 0.5 0.5 0 0 0 0
85 0.5 0.5 0.5 0 0 0 0 0 0
90 0.5 0 0 0 0 0 0 0 0
Hardness
Value
(HR)
Diameter (mm) of Columned Specimen
6 10 13 16 19 22 25
Revised Value of Rockwell Scales B, F, G (HR)
20 4.5 4.0 3.5 3.0
30 5.0 4.5 3.5 3.0 2.5
40 4.5 4.0 3.0 2.5 2.5
50 4.0 3.5 3.0 2.5 2.0
60 5.0 3.5 3.0 2.5 2.0 2.0
70 4.0 3.0 2.5 2.0 2.0 1.5
80 5.0 3.5 2.5 2.0 1.5 1.5 1.5
90 4.0 3.0 2.0 1.5 1.5 1.5 1.0
100 3. 2.5 1.5 1.5 1.0 1.0 0.5
(Table 4)
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4.2 THE OPERATION PROCEDURE OF THE HARDNESS
TESTER
4.2.1 Connect the Power Cord (13) with the power source; turn
on the ship-shaped Switch (14), the nixie tube of the Touch
Panel (10) will light up.
4.2.2 According to hardness grade of specimen material,
select Scale from Table 2. Turn the Load-Change Hand Wheel
clockwise to select and conrm the total test force.
4.2.3 Push the Indenter (4) into the hole of main spindle closely
against the supporting plane and make the caved plane of the
indenter handle face to the screw. Fasten slightly the Fastening
Screw of Indenter (3), and then place the specimen on the
Testing Table (5).
4.2.4 Turn the Rotating Wheel (8) clockwise, lift the Up and
Down Lead Screw (6) to enable the specimen slowly touch the
indenter without any shock until the short pointer in Dial (2) of
the hardness tester move from black point to red point, at this
time, the long pointer turn 3 cycles then indicate to position “C”
(When test HRB hardness value, the long pointer will indicate
to position “B”), at this point, the initial test force 98.07N has
been loaded. The offset of long pointer could not exceed over
5 division values of hardness. If offset of long pointer exceed
over 5 division value, the Rotating Wheel should not be turned
in opposite direction, and testing position shall be changed for
another test again.)
4.2.6 Press the START key on the Touch Panel; the motor
begin to run to load the main test force automatically, the dwell
time of total test force is 5 seconds, and the screen will show
the back-counting of dwell time to 0, the motor run to unload
the main test force automatically, but keep the initial test force.
4.2.7 At this time, the data indicated by long pointer in Dial is
the hardness value of specimen tested.
4.2.8 For Rockwell hardness testing, the dwell time of test force
can be selected by pressing up and down keys on the Touch
Panel.
4.2.9 Turn the Rotating Wheel in opposite direction and lower
down the Testing Table. And then change the points to be
tested, repeat the operation described above.
4.2.10 The number of the points to be tested is not less than 5
(the rst point is not included) on each specimen. The number
of the points to be tested may be reduced a bit for the specimen
tested in a serial.
Note: During the loading and unloading of the test force,
it is prohibited to rotate the Load-Change Hand
Wheel. The force rotation would make the
components inside the instrument dislocated,
and cause the disorder to the test force.
4.3 THE REGULATION OF DISPLAYED HARDNESS VALUE
(Fig.5)
The precision of the displayed hardness value of the hardness
tester is just calibrated before the instrument is turned out of
the factory. If an error is caused due to the transportation, the
operator may regulate it based on the understanding of the
instrument structure and principle. The method is as follows:
Remove the Upper Cover. If the displayed hardness value is
in inferior to the hardness value of standard hardness block,
withstand a screwdriver into the groove of the M4 Screw
Rod (23) and unscrew the nut a little. Rotate the Screw
(24) clockwise to forward a bit (about rotate it half cycle, the
hardness value is 1 degree higher), then calibrate the zero
position (C position) for dial indicator, withstand the Screw Rod
and fasten the nut. Do the test and display hardness value until
the diaplayed hardness value stands in the tolerance
range (Table1). If the displayed value is higher than the
hardness value of the standard hardness block, rotate the
Screw in the opposite direction. (There are screwdriver and
spanner in the accessories kit.)
22. Connecting Rod
23. Screw Rod
24. Screw
25. Protecting Gasket
Fig. 5
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5. MAINTENANCE AND PRECAUTIONS
Phenomenon Possible Causes Method Used
When the hardness
tester is started on,
the nixie tube
is not light up.
1 The current is blocked.
2 The fuse is broken.
1 Check the power cable.
2 Get out the fuse from accessories kit for
replacement.
The long pointer
is offset, not indicate
to “C” position
After regulate the display value of hardness, it
causes the long pointer offset.
According to Fig.5, loosen the nut (21), Rotate the
M4 Screw a bit, enable the Dial aim to “C” position,
x the screw and fasten the nut.
The Up and Down
Lead Screw road is
blocked
The t-clearances of Up and Down Lead Screw
are too small; they are blocked by the thread
ends or dirt.
Remove the protecting cover of the Up and Down
Lead Screw and clean the teeth of the screw with
a clean cloth and than held Rotating Wheel with
two hands to pull the Up and Down Lead Screw up
and down. (it is prohibit to clean the UP and Down
Lead Screw with abrasive paper)
The deviation of the
displayed hardness
value is too great.
1 The indenter is damaged
2 The weights are not arranged in proper order.
3 The hardness tester is not placed in the
horizontal level, the weights have friction touch
with the inside wall of the instrument body.
4 The total test force or the indenter is wrongly
chosen.
1 Change the diamond indenter or the ball
indenter.
2 Install the weights according to Fig.3
3 Calibrate the hardness tester with a level on
the Testing Table according to section 4.2.3 in the
Chapter IV.
4 Select the tester force and the indenter according
to the requirements in Table 2
(Table 5)
6. STORAGE AND SHIPPING NOTICE
• The operator should observe the operation regulations
and calibrate the instrument with the standard hardness
block before and after the test. If the hardness tester is
rarely used, the several tests should be carried out on
the standard hardness block to make the hardness tester
stable after start the instrument, and then carry out the
necessary tests for specimen.
• The standard hardness block should be used only on the
working plane with the distance of the two neighboring
indentations and of the center of the indentations to their
edges are not inferior to 3 mm. The life period of the
standard hardness blocks is 2 years.
• During the transportation of the hardness tester, the
hardness tester should be xed with the Connecting
Rod, with the weights and the Handing Rod discharged.
Disconnect the power source before the weights and the
Hanging Rod are taken out.
• Keep the hardness tester clean and cover it with anti-
dust bag after the hardness tester is used, lubricate the
hardness blocks and ball indenters with the rust protecting
oil to avoid rust.
• Carry out periodic inspection of the hardness tester, at
least once a year in order to assure the correct operation
of the hardness tester.
• The Treatment of the Common Malfunctions of the
hardness tester
• When the hardness tester is in trouble state, it is advisable
to get in touch with the relative units for the repair.
• The normal and common malfunctions should be dealt
with by user’s self. (Table 5)
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NOTE
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NOTE
H-Master
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ALPA_DUROMETRO_H-MASTER_036