Some standard content:
ICS19.060
Machinery Industry Standard of the People's Republic of China
JB/T937B—2001
Leeb hardness tester
2001-12-04 Issued
2002-03-01 Implementation
Issued by China Machinery Industry Federationwww.bzxz.net
JB/T9878—2001
This standard is a revision of the technical requirements for 28N71010—90 Leeb hardness tester. This standard has some changes from 2BN71010-90 in the following major technical contents:
Added "Foreword" and Chapter 3 "Classification"; One of them is the content of "Calculation error" in the original standard; Modified the requirements and installation methods of "Indication error" and "Indication repeatability"; The "Environmental adaptability" is listed independently; In Chapter 5-Test method, the content of "5.1 Test conditions" which is different from "4.1 Working conditions" is newly stipulated; One of them is the content of "Completeness" in the original standard. The standard related to this standard is CB/T17394-1998 (Metal mold hardness test method). This standard will replace ZBN71010-90 from the date of implementation. This standard is proposed and managed by the National Testing Machine Standardization Technical Committee. The responsible drafting unit of this standard: Times Group Corporation. This standard was prepared by: Changzhou Testing Machine Research Institute, Donghai Instrument Hardness Block Factory. The main drafters of this standard are: Bang Jianguo, Wang Xuezhe, Shang Yu, Chen Zhiming. This standard was issued in 190 with the number ZN71010-90. 1 Standard of the People's Republic of China on Mechanical Industry Hardness Tester Hardness Tester JB/T 937a-20G1 ZBYT1010-90 This standard specifies the classification technical requirements, test methods, test rules, marking and packaging of hardness testers. This standard is applicable to Mohs hardness testers (hereinafter referred to as hardness testers) with impact energies of 2.7 J, 11 J and 90 m. Reference Standards The provisions contained in the following standards constitute the provisions of this standard by citing them in this standard. When this standard is published, the versions shown are valid. All standards will be revised, and parties using this standard should explore the possibility of using the latest versions of the following standards. GB/T2611--1992 Technical requirements for test machine sources CB/I 4340.1—1999
CB 65872—1986
GB/T 6587.31986
CB/:- 6587.4—1986
GE/T 6587.5—t996
GB/:6587.61986
GB_15464—1995
3 Classification
Golden Title Weimin Physical Education Test
Part 1, Test Party Send [eq[306507-1] Temperature Reduction Test Sign
Electronic Measuring Instrument
Electronic Measuring Drinking Apparatus
Distinctiveness Test
Hand-held Secretion Instrument
Promote Test Hall|| tt||Electronic wine cover instrument
Strike test
Measurement and collection device
Transportation test
Only instrument instrument includes general technical miscellaneous cattle
Hard development meter to verify all kinds of impact devices, see Table 1, Table 1
Li Le hard ink will
3.2 Hardness tester various types of impact devices main technical cost, see Table 2, China Machine Pile Industry Federation 2001-12-04 approved
Screen mouth impact device The measured temperature is measured by DC type special equipment. The measured residual value is measured by DL type special impact device. The measured value is measured by D+15 impact device. The measured value is measured by E display impact device. The measured value is measured by the impact device. The measured value is measured by 2002-03-0T actual inquiry. The main results are as follows: the impact plate, the impact volume, the impact part ball diameter ... | Ball Shooting
4 Technical Requirements
4.1 The upper blasting strip
blasting enzyme
carbonized carbide
smashing degree should be able to work normally under the following conditions: ambient temperature -40℃;
JB/T9378--2001
hard impact device (partial type
brewing mother
) relative humidity is not more than %
C; there is no vibration, no overlapping disk field, and no corrosive medium in the surrounding environment. 42 Impact device
The tolerance of the impact body mass is ±0.2.
Embrittle
Intensified
The tolerance of the diameter of the impact body made of tungsten carbide is ±0.004mm: the tolerance of the radius of the spherical surface of the impact body is 0.1mm. 4.2.2
4.2.3 The surface of the tungsten carbide ball should be smooth and free of sinking, and its surface roughness Ry should not be greater than 0.4. 4.2.4 The hardness of the tungsten carbide ball should not exceed I500HV0.2. 4.2.5 The impact device should work reliably, operate freely, and not get stuck. 4.3 Indicator
4.3.1 The indication value of the indicator should be clear, accurate, and consistent with the hardness indication value of the lamp. 4.3.2 Under normal working conditions, the indicating device should work stably for 8 hours. Hardness ratio indication error and indication tolerance
The indication error and indication tolerance of hardness meter shall comply with the provisions of Table 3. 3
Impact fitting type
No hardness value in the standard
760±30RL
530-40HD
760±30HLDC
S30±40HILDC
73G-40HLDL
76G+30HLD+15
544±40HLD+15
590±40HLG
S0010HIF||tt ||725±30HIE
50A±40HLE
822±30HIC
59+40HLC
Indication value
26HLDC
10HLIC
12HUDL
±12HEJ+15
±12HLE
Indication value heavy chloride
12HLDL
12FLD+15.
JB/T 9378—2001
4.5 Appearance quality and assembly quality
The appearance quality and assembly quality of the hardness tester shall conform to the relevant provisions of Chapter 8 and 4.2 of GB/T2611—1992. 4.6 Environmental adaptability The adaptability of hardness meter to moisture, humidity, vibration, impact and light transportation environment shall meet the requirements of Group II in GB/T6587.2~CB/65875 and Grade 3 circulation conditions in GN/T6587.6. 5.1 Test conditions The hardness meter shall be tested under the following conditions: temperature 20°C±10°C; relative humidity not more than 80%; surrounding environment without condensation, strong magnetic field and corrosive medium. 52 Inspection equipment
The equipment and tools used for hardness inspection are as follows: 1) The overall dimensions (diameter x height) are 90mmx55mm and 120mm×70mt, and the Leeb hardness value is in accordance with the standard Leeb hardness block specified in the specification;
) Vertical hardness tester with a minimum graduation value of 0.05 and an accuracy of ±0.25mm; 2) Surface scale inspection:
e) 30x fire mirror;
Body hardness tester;
B) 1M times or more projection.
5.3 Inspection of impact device
5.3.1 The impact quantity of the body to be impacted is tested with a minimum graduation value of 0.05g, and the result shall comply with the provisions of 4.2.1. 5.3.2 The carbide ball shall be measured at three positions using a vertical optical meter with an accuracy of 0.25 μm. The required value of the ball diameter at any position and its nominal value shall comply with the provisions of 4.2.2. The projection of the diamond ball on the projector shall be compared with the special linear template. The ball head shall be rotated around the common line and the spherical radius on two axial sections within 0.2 mm of the diamond wall shall be compared successively. The results shall comply with the provisions of 4.2.2.
5.3.3 The reflection and surface roughness of the carbide ball shall be inspected by a 30-fold magnification and surface roughness inspection instrument respectively. The results shall comply with the provisions of 4.2.3.
5.3.4 The hardness of the carbonized chicken ball shall be tested by the color test method specified in GB/T4340.1 using a hardness tester. The result shall comply with the provisions of 42.4.
5.3.5 The impact device shall be tested in actual operation as required, and the result shall comply with the provisions of 42.5. 5.4 Inspection of indicating device
5.4.1 While inspecting the indication error and indication repeatability of the hardness tester, observe the working state of the indicating device, and it shall comply with the provisions of 4.3. 5.4.2 Continuous operation qualitative inspection: Turn on the power supply to put the hardness tester in working state. Under normal working conditions and within the specified time, perform a regular Leeb visual acuity test every 15 minutes, observe and record the working state of the indicating device, and the result shall comply with the provisions of 4.3.2.
5.5 Test of indication adjustment and indication repeatability On the standard hardness block, use a hardness tester to measure points along the vertical downward direction, calculate the arithmetic mean of the inverse values at each point, and the hardness value error is calculated according to the formula:
E/T937B—2001
Wherein: The arithmetic mean HL of the indication measurement at 5 points is the hardness value calibrated by the standard Leeb hardness block. The indication repeatability of the hardness tester is calculated by the formula (2): 6 = HL-HE
The formula is: HL is the maximum value in five-point double measurement; EL is the minimum value in five-point pressure measurement;
The measured indication error and indication weight difference shall comply with the provisions of 4.4, 5.6, appearance quality and assembly quality inspection of G/T2611-1992 Chapter 8 and 4.2, and the rest shall comply with the provisions of 4.5. 5.7 Test of environmental specifications
· (2\
The adaptability of the hardness meter to the environment of temperature, humidity, vibration and shock shall be tested according to the specified conditions of GB/T6587.2-GB/T6587.5; the hardness meter's performance shall be tested according to the 3rd level of GB/T6587.6. After the test, it shall be tested according to this chapter. The hardness shall meet the requirements of 4.2.5, 4.3.2 and 4.4.25. 6 Inspection rules
The inspection of the strength meter is divided into factory inspection and type inspection. 6.1 Delivery inspection
The delivery inspection of the hardness meter shall be carried out according to the requirements of 4.2.5.4.3.1.4.4.4.5. It can be delivered to the factory only after passing the inspection. 6.2 Type inspection
The formal inspection shall be carried out in accordance with all the requirements of 3.2 and 4 of this standard, and the full performance test shall be carried out according to the pull test method specified in Chapter 5. 4.6 The test of environmental adaptability can only be carried out under the condition that other test items are qualified. The formal inspection shall be carried out in the following circumstances: new product trial production or old product finalization production in the factory; when the product is officially put into production, and there are major changes in its structural design, materials, packaging, process and related components that may affect the product performance; when the product is resumed after a long period of suspension; when batch production products are inspected; when the national quality supervision and inspection agency has put forward inspection requirements. 6.3 Sampling and judgment rules The type inspection of the meter shall be carried out by randomly taking samples from the batch produced under one piece, and the sampling and judgment rules are: n (An R.) = 3 (0,1):
That is: sample size r=3, qualified judgment efficiency A,-1, unqualified judgment number R,=1. 6.3.2 Judgment of unqualified items and unqualified products This qualified classification does not include unqualified and non-qualified items. The specific classification is as follows: When the test results show that there is a hazard or serious damage to the basic function of the hardness tester, it is judged as Class A unqualified; ) When a quality characteristic specified in 4.2, 4.3.2.4.4, 4.6 does not meet the requirements, it is judged as Class B unqualified; ) When the quality characteristics specified in 4.3.1, 4.5 do not meet the requirements, it is judged as Class C unqualified; When the following categories (AB, C) are found in the product after the standard test, Qualified products are counted as unqualified products when: there is one or more A-type products; there is one or more B-type products that are unqualified; there are more than two (not including two) type products that are unqualified. 6.3.3 Qualification criteria J/T9378-2001 The number of unqualified products in this inspection specification is equal to A, then the inspection batch is judged as a qualified batch; when the number of unqualified products is equal to 1 (=R, then the inspection batch is judged as an unqualified batch. 7 Standards. The packaging should have a nameplate, and its code is after the packaging: a) in the package:
6) factory number:
) factory number:
name of the manufacturer.
72 Packaging The packaging of the hardness tester is a soft, comfortable, dustproof and composite protective packaging. The gas installation of the hardness tester shall comply with the requirements of 4.6.I, 4.6.2, 4.6.4 and 4.6.6 of GB/T15464-1995.5. When the quality requirement specified in the requirements is not met, it is judged as a class unqualified product. After the inspection, when the following categories (AB, C) of unqualified products appear in the batch of products, it is counted as a unqualified product: one or more class A products are unqualified; one or more class B products are unqualified; there are more than two (not including two) class B products unqualified. 6.3.3 Qualification judgment criteria J/T9378—2001 If the number of unqualified products appearing in this inspection specification is equal to A, then the inspection batch is judged as a qualified batch; when the number of unqualified products is equal to 1 (=R, the inspection batch is judged as an unqualified batch. The gas packaging should have a nameplate, and its code is: a) after the name: 6) factory number: 7) manufacturer number: 8) manufacturer number: 9) manufacturer number: 10) manufacturer number: 11) manufacturer number: 12) manufacturer number: 13) manufacturer number: 14) manufacturer number: 15) manufacturer number: 16) manufacturer number: 17) manufacturer number: 18) manufacturer number: 19) manufacturer number: 20) manufacturer number: 21) manufacturer number: 22) manufacturer number: 23) manufacturer number: 24) manufacturer number: 25) manufacturer number: 26) manufacturer number: 27) manufacturer number: 28) manufacturer number: 29) manufacturer number: 30) manufacturer number: 31) manufacturer number: 32) manufacturer number: 33) manufacturer number: 34) manufacturer number: 35) manufacturer number: 36) manufacturer number: 37) manufacturer number: 38) manufacturer number: 39) manufacturer number: 40) manufacturer number: 41) manufacturer number: 42) manufacturer number: 43) manufacturer number: 44) manufacturer number: 45) manufacturer number: 46) manufacturer number: 47) manufacturer number: 48) manufacturer number: 49) manufacturer number:
72 Packaging
The packaging of the hardness tester is a protective bag, a waterproof and dustproof composite protective package. The packaging of the hardness tester should comply with the requirements of 4.6.1, 4.6.2, 4.6.4 and 4.6.6 in GB/T15464-1995.5. When the quality requirement specified in the requirements is not met, it is judged as a class unqualified product. After the inspection, when the following categories (AB, C) of unqualified products appear in the batch of products, it is counted as a unqualified product: one or more class A products are unqualified; one or more class B products are unqualified; there are more than two (not including two) class B products unqualified. 6.3.3 Qualification judgment criteria J/T9378—2001 If the number of unqualified products appearing in this inspection specification is equal to A, then the inspection batch is judged as a qualified batch; when the number of unqualified products is equal to 1 (=R, the inspection batch is judged as an unqualified batch. The gas packaging should have a nameplate, and its code is: a) after the name: 6) factory number: 7) manufacturer number: 8) manufacturer number: 9) manufacturer number: 10) manufacturer number: 11) manufacturer number: 12) manufacturer number: 13) manufacturer number: 14) manufacturer number: 15) manufacturer number: 16) manufacturer number: 17) manufacturer number: 18) manufacturer number: 19) manufacturer number: 20) manufacturer number: 21) manufacturer number: 22) manufacturer number: 23) manufacturer number: 24) manufacturer number: 25) manufacturer number: 26) manufacturer number: 27) manufacturer number: 28) manufacturer number: 29) manufacturer number: 30) manufacturer number: 31) manufacturer number: 32) manufacturer number: 33) manufacturer number: 34) manufacturer number: 35) manufacturer number: 36) manufacturer number: 37) manufacturer number: 38) manufacturer number: 39) manufacturer number: 40) manufacturer number: 41) manufacturer number: 42) manufacturer number: 43) manufacturer number: 44) manufacturer number: 45) manufacturer number: 46) manufacturer number: 47) manufacturer number: 48) manufacturer number: 49) manufacturer number:
72 Packaging
The packaging of the hardness tester is a protective bag, a waterproof and dustproof composite protective package. The packaging of the hardness tester should comply with the requirements of 4.6.1, 4.6.2, 4.6.4 and 4.6.6 in GB/T15464-1995.
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