Some standard content:
Verification Regulation for Metal Brinell Hardness Tester
JJG: 1SAF199E
Verification Regulation for Metal Brinell Hardness Tester
YerificeatioayRegutation f theMetailicBeinollIlardness Testing Muchints...
JIC 150--1990
代150—983
.-......
This inspection shall be subject to the technical supervision of the user on February 26, 1900-, and shall be circulated from January 11, 1900. Authorized Unit: Bohai Institute of Metrology
Drafting Unit: Chinese Institute of Metrology
The technical provisions of this regulation shall be interpreted by the issuing unit Yu Wu. The main drafter of this regulation: Yang Shuzhuang (National Institute of Planning and Design) Technical requirements Verification items and verification points Verification methods Treatment of test results and verification period Appendix Verification certificate content Verification regulation of Brinell hardness tester This regulation is applicable to the verification of newly manufactured, non-standard and repaired Brinell hardness testers (hereinafter referred to as "brinell hardness testers"). ||The test method is mainly suitable for the determination of the non-ferrous metal, soft metal and other materials. In addition, this test method can be used for the determination of the whole material, other non-metallic materials such as wood, etc. This test method can only be used for the determination of the whole material, other non-metallic materials such as steel or other materials with a certain diameter. Under the action of the test force, the test force is removed at the same time, and the indentation is obtained. The average pressure on the spherical surface is expressed as the value of the indentation. The range of the degree is:
8-65(1 1:35 1W)
2 Technical requirements
The product has a nameplate indicating the manufacturer's name, product model, number, year of manufacture, etc. 2. The following conditions are prohibited: 2.1 Room leakage IU-35t: ;
2.2 Clean environment, no vibration:
No corrosive gas;
Installed on a solid foundation. The upper and lower parts of the gauge, the force mechanism, the buffer mechanism and the installation are all normal and flexible: the loading and unloading force 3
should be stable, and there should be no vibration or special phenomenon: the screw should not fall or have any product or phenomenon 4
The reading table should be firmly installed on the test bench, the test table surface should be flat, the difference between the main axis and the test table should not be greater than 0.2, the difference between the screw shaft and the vertical axis should not be greater than 5. The test method
Test blade selection table [the cup weight value specified in the table 1
adjustment seat storage
HHH (HEW) LU.SJIU
HRSHFW;1015IX
[S (EDW; C-100C
[E6 (E/) H50
FKHH:J2:
1S H: 10-25
H9e :HhW; :0-1m
Test force 1
N fut-
29.42× * :33002
11.71 -: 1* :1501
Q:Snt 1o (Imr)
4.903/ 13 (50)
2.452> * (25)
1.226 > 1 4.2*.
Mindian No.
Hks 1:1w3 5,S1
HRS (FW 52u
IIss (rT: 57.2.
Hs iFKW: 5 G2.5
[0s ERW 523L35
HE (J) 3.23
1m5:1sw)2.5/167.5
HS :HEW) J.: .S||tt| |IIS :HWI 7.5.A1.15
HE J) 2 5-13.6二5
1ms :1W) 2.5-7.8125
H: (HRW; 2.-/s.2?
H :HEW; 7/120
J(1 240
17 (HW: 2/2)
Hs iHhw, 2-l.!
IF (HW: 2/)
HS (1W) 2/4
:TS (HW) 1.5wwW.bzxz.Net
HRS (HW:
H-: :HhW: --1.25
HS(HW1
-1 fn.3N
The allowable error of the test force is [.%,
Let: 1
7.355/101750)
2.452 - 113: 12513
1.226 × J :125:
..x1' c92.51
re-25:
1.177: 10:(130
8 ball pressure head
breaking quality requirements of pressure head materials, technical requirements, case equipment, etc. are effective in accordance with the requirements of 454-1 test 6: the main technical requirements of the hardness tester ball alloy ball are listed in Table 2. The ball is not less than 13 in diameter. Table 2
! Allowable error
Run to meet
stop technology is good
natural flat card
originally not the following
decision page room
: 1san
Continued flat length (m:
(inagt)
. The graduation value of the pressure test device should be able to estimate 0.5% of the pressure reported diameter. 9.1
The allowable error of the measuring device is .5%
The requirements for the error and mutual interference of the indication of the basic meter are shown in 3.3
—5. The calibration items and calibration tools are shown in Table 4
According to the most important purpose
The water
Hidden safety juice main axis Japanese style table
operator's vertical
style six
board cloth sauce performance
monitoring table production
h. test speed change
verification items and verification use
qiubai ruler
measurement method
optical meter length design
ten-second product source worry
le only plan shallow
chuan energy support art
not more than 0.n
hong old jade
0.0: - (.iky i1 .1ohg!
o. -tky ( -ukg)
1 -3h :IC0- 3Obf
3- 0hnog
Accuracy: 05m
Division: 0.001cr
Accuracy, 0,351
Measured by: (00er
Free and small allow Smm
Measurement range: 0-Lnr1
May not be combined! U,032=
Dynamic safety
Detailed position
:sl-2unw;/n
25—135HES (W) 10/1000
:5 2snrm tw: 2.:/197.5
5-[2-Hbs 1W) 2.541.-
: "Theoretical calculation uses: HESW, 040 standard, +P(: ·(#
Four verification methods
12 According to the requirements of Article 2.3 and 4, conduct visual inspection. 13 For the verticality inspection of the main shaft and the test bench, place the calibration rod on the main shaft, and measure the right angles and step ruler at two corresponding forces: then remove the test rod and reinstall it, and measure again. The maximum signal of the measured result should meet the requirements of Article 5. 14 The axis of the lifting screw and the axis of the main shaft are perpendicular to each other. On the day of the shaft inspection, place a 150-250HBS (W) 10/3000 standard hardness block on the test bench, then slowly put it on the test bench, make the pointed head (not the correct head) touch the standard hardness block, and produce a small indentation on the standard hardness block, then lower it for testing. In the same way, under the condition that the standard hardness block and the test bench surface remain unchanged, make the test block rotate 00 and press once, for a total of 4 times, measure the distance between the two relative marks, of which the larger distance is the shaft length, and the result is consistent with the first condition. L5 test force verification
Pre-press the force measuring instrument 3 times with the limit test force when calibrating it: then verify the zero point and start the verification: 15.1 For free-loaded Brinell hardness testers, the movement direction of the test small lever during calibration shall be consistent with the movement direction of the test force bar during calibration, and the test small lever shall be subjected to more than 3 vertical positions within the entire stroke range of the test small lever. The test force for each measurement shall comply with the provisions of Clause 7.2. 15. 2 For direct-compensated Brinell hardness testers, the movement direction of the auxiliary lever during calibration shall be consistent with the movement direction of the main lever during calibration, and the test shall be carried out at more than 3 positions within the entire stroke range of the main shaft. 3 measurements shall be recorded at each position, and the test force for each measurement shall comply with the provisions of Clause 7.2.
16 Check whether the scale of the measuring device is clear and uniform: Use a standard scale to check the accuracy of the measuring device. When checking, first adjust the focal length, and then move the measuring device to the required scale line and compare it with the scale line of the standard scale line. Each level of magnification of the measuring device should be measured at least at intervals of 50%. The relative error W should be selected according to the following formula:
In the formula; The measured length of the measuring device (mm): r
The actual length of the standard scale line comparison unit (mm): 1159
The scale of the measuring device is calibrated according to the above method. The difference should be: 17 Inspection of the ball indenter
17.1 Check the outside of the ball and observe the surface condition of the ball under a stereo microscope at a magnification of 10. There should be no soft spots, scratches, cracks, etc. on the surface of the ball. Use a microscope to measure its surface roughness in accordance with the provisions of the scientific research policy.
17.2 Study on the diameter of the ball
Calculate the diameter by measuring the length of the ball with a slow, vertical measuring rod connected to a ruler. The diameter should be marked on at least 3 squares. The 3 measured values should all comply with the provisions of Article 8.
18 Estimated error and verification of the hardness tester 8.1 Test force The two integers obtained by the test force are as follows. Under the selected test force range, the time required for the movement of the auxiliary force 1 to the bottom is measured by the caliper (the full force can be mounted on the bracket). The speed should be less than 1m. The time required for the test force to be fully applied is 5 seconds. 8s
test force holding time, the measured value for colored gold reduction is 1015≤: that for non-ferrous gold expansion is 31--35%: when the accuracy is less than 35, it is 60-65s18.2. Measure 5 points above the standard distribution (3 points when using a 10mm ball indenter), the distance between the two adjacent indentation centers should not be less than 4 times the diameter of the element: the distance between the center of the indentation and the edge of the standard block should not be less than 2.3 times the diameter of the indentation, the measurement of each indentation diameter is carried out in two perpendicular directions: the average value, the difference in diameters of the two coins in the direction of the shorter diameter should not be greater than 1%, 18.3 The average value of the 5 points marked by the above method (3 points when using a 0.1 effective indenter) is the accuracy indication value, and the minimum indication error is calculated according to the following formula: Hx009
formula! : The average value of the hardness of the 5 points;
H-the value of the standard hardness block.
5-point reading (measure 3 points when using a 10mm ball indenter) is calculated according to the following formula: b-Hw-m
Formula: Hx-the maximum value of the 5-point hardness value; mn-the minimum value of the 5-point hardness value.
The repeatability of the hardness meter's indication is reduced in accordance with the provisions of Article U, (5)
Use the hardness meter in the river, and only record the situation in accordance with the provisions of Articles 12, 15, and 1. If the inspection is violated: When the inspection is carried out 19
Results The reason for not meeting the requirements of F, X is to conduct the reverse calibration according to the provisions of Article 13, [6, 1, and the requirements of the user unit. Only one or two Brinell hardness indications can be verified. The position must be measured in the calibration book.
5. Processing of calibration results and calibration cycle
20. The hardness tester that meets the requirements of this code shall be issued with a calibration certificate (the format of the certificate is shown in the appendix): The hardness tester that meets the requirements of this code shall be issued with a calibration certificate. The calibration period is 1 year.
It is called hardness test
Appendix calibration certificate format
Test force according to the set results
New test force shop
Indicates the actual test results
People's bell:
1-4151
Tip: This standard content only shows part of the intercepted content of the complete standard. If you need the complete standard, please go to the top to download the complete standard document for free.