JB/T 9141.8-1999 JB/T 9141.8-1999 Test method for sliding friction coefficient of flexible graphite sheet JB/T9141.8-1999 Standard download decompression password: www.bzxz.net

1CS21.140
China Machinery Industry Standard
JB/T9141.8-1999
Flexible Graphite Sheets
Test Method for Friction Coefficient of Sliding Friction Coefficient
Test Method for Friction Coefficient of Sliding Friction Coefficient by shiding1999-06-28 Issued
National Machinery Industry Bureau
2000-01-01 Implementation
JI/T9141.8-1999
Only revised from the revision date, this standard is a compilation of 7.FJ22016-89 "Flexible Stone Material Source Standard", the main technical content has not been finalized, this standard will replace ZBJ22016- from the date of implementation, this standard is proposed and managed by the Technical Committee for Standardization of Static Gravity Seals for Fillings. Standard drafting unit: 1. Hai Material Research Institute. This standard mainly drafted by: Shi Linzhang,
Machinery Industry Standard of the People's Republic of China
Test method for coefficient of sliding friction of flexible graphite sheets
'fesl raetbnu far friction cocfficlent ofrkexible graphitesheets by slidingJB/T9141.B—1999
Generation ZBJ22G16—89
This standard specifies the test equipment and devices, specimen requirements, test steps and test results, and the standard is applicable to the test method for coefficient of sliding friction of flexible graphite sheets. 2. ! Transmission system, can stop or disk at a given speed, accurate to within 5%, and require the axis of the disk installation part to be less than 0.0: m
2. Loading system: apply test force to the sample and the net disk, accurate to within 5%, 2.3 Test system, make the determination and record the wall friction range, pin to within 5%. 24 The structure and size of the sample are shown in Figure 1, the material is 45 steel, the clamping base should be guaranteed to ensure that the sample has no axial movement after installation. The sample can be removed or held after the movement
Figure 1 Sample design: Let the test set this standard recommends the use of M-2 type set test machine o
5 The size of the disk is shown in Figure 2, the material is 45 (at 40~50HRC) or iron body stainless steel. The plate can be repeated, and it needs to be flattened after each test span. Only the outer diameter reduction is greater than 0.5mm. The plate material can be determined according to the belt. Approved by the State Machinery Industry Bureau on 190-16-29
2000.01-E1 implementation
3 Test sample
3.1 The test size of the flexible plate is shown in Figure 3JB/T914L.8-1999
Figure 2 Grinding
Figure 3 Trial selection
3.2 The surface of the sample should be half-smooth and smooth, without defects such as cracks, delamination and obvious impurities. There are less than two specimens in each group. 4 Test conditions
During the test, the specimen remains stationary and the disc rotates at a speed of 200rmn. The load is called N. The load can be selected according to the actual situation.
5 Test steps
5. The pre-grid plate specimen is firmly attached to the fire and supported by the upper axis. The carrying surface is aligned with a protractor, and the intersection of the tool and the disc is in the center of the specimen.
Note: The bonding joints are suitable for the test.
5.2 Use propylene glycol to gently remove the oil from the surface of the sample. 5.3 Adjust the original carrying force to an appropriate range (-5N·m), install the rolling moment recorder, and calibrate the machine. 5.4 Apply the load semi-steadily to the selected value.
5.51 After stopping the test, read the obstacle moment that tends to stabilize. 6 Test results and calculations
6.1 Single test friction coefficient () formula: 2
Wu Zhong: A Friction, Nm:
One return radius.m:
F—Test wave load, N.
JR/T91418-1999
6.1 Test results are based on a group of test specimens. The mean value is expressed by the clock, and the two generations of effective numbers are taken. If the standard deviation is required to be 5, it can be calculated according to formula (2):
Formula: 1-Sample dial effective standard:
x——single sample test value:
A group of test values ​​calculated by the test value: n—the number of samples tested.
Test report
The test report should include the following contents:
a) Proof according to this standard:
b) Material specifications, brand, and manufacturer of the village material!
) Environmental conditions (temperature, humidity)
d) Net material, hardness, and surface roughness;
e) Test load: wwW.bzxz.Net
Test results:
g) Test period, personnel,
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