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2
This Instruction Manual shall be carefully read through in prior to use of
the apparatus to clearly understand the detailed operation steps and
special notes, and avoid apparatus damage or personal injury caused
by improper use.
Attention
Digital
and sensor technology, realizing the high-accuracy and intelligence of
portable tester, as well as the possibility of fast and accurate testing the
body hardness of the large parts.
It
simplifies
the
operation
steps
of
Rockwell
Hardness
Test:
directly
load
total
test force; maintain
it
for
a
few
seconds;
release
the
total
test
force
and
then
the
test
is finished,
with no
step
of
maintaining
the
preliminary
test
force
of
10Kg.
It thoroughly follows the Rockwell Hardness Test Principle, and
complies with relevant regulation of ISO6508, and ASTM E18.
Magnetic Rockwell hardness tester applies computer, electric
Description
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Principle and Structure
The indenter is pressed (diamond cone or carbide ball ) into the
specimen surface in two steps. After maintaining the pressure for a
predetermined period of time, unload the major test force F1, and
measure the remaining indentation depth h under initial test force F0.
Rockwell hardness value is:
In this equation:
N — a constant related to scales; for A, C scales, N=100; for B scales,
N=130.
S — unit indentation depth, for Rockwell hardness it is 0.002mm.
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1 — indentation depth under initial test force F0;
2 — indentation depth under total test forces F0+F1;
3 — elastic recovery depth when major test force F1 is removed;
4 — remaining indentation depth h;
5 — test piece surface;
6 — datum plane;
7 — position of indenter
The tester consists of 2 magnetic chucks and 1 intelligent hardness test
unit. In testing the magnetic chucks fixes the instrument to iron and
steel part. The operator load test force by hand wheel, and the force
sensor detects the force simultaneously and display it on screen, at the
same time the distance sensor detects the depth which consists of fine
screw and spiral encoder, then after the load force released and
indenter uplifted for a suitable distance, the micro-processor will
calculate the hardness and display it on screen.
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display panel
screen
button
magnetic
switch
magnet
adapter
indenter
light
adapter
magnet
magnetic
switch
battery box
encoder
handwheel
carrying handle
