JB/T 9397-2002 Technical requirements for tension and compression fatigue testing machines
Some standard content:
Normative references:
3 Technical requirements.
3.1 Working conditions
Static force indication error
Dynamic force indication passive special
3.4 Upper and lower chucks
Frequency characteristics..
Dynamic force waveform
Specimen type
Counter,
3.9 Super test force performance.
Safety protection device,
Transport flame retardancy
3.12 Other components
3.13 Other requirements..
4 Test method
4.1 Test conditions,
Testing instruments, tools and measuring tools
Determination of static force indication difference.
4.4 Determination of dynamic indication deviation
Determination of upper and lower chucks
4.6 Inspection and monitoring of extraction characteristics|| 4.11 Inspection of safety protection device, 4.12 Inspection of transportation frequency resistance performance, 4.13 Inspection of other parts, 4.14 Inspection of other requirements, 5 Inspection and testing, 5.1 Factory inspection, 5.2 Type inspection, 5.3 Judgment rules, 6 Marking, packaging, transportation and storage, 3B/T9397-2002, tt/|JB/T8397--200 2
This standard is a revision of 7BY022-1981 "Technical Conditions for Compression Fatigue Testing Machines". This standard is not equivalent to the international standard 1S01099195 (axial load fatigue test), and meets the requirements of the international standard for tension testing machines. During the revision, the original standard was edited.
This standard has some changes from 7BY022-1981 in the following major technical contents: Chapter 1 "Scope" was rewritten, and Chapter 2 "Normative Reference Documents" was added: the legal measurement units were changed to legal average units: the definition of material or test machine 3 in JB/T7406.-1994 testing machine technology was used, and the relevant technical evaluation was revised. Modification - The basic standard GB2611-1992 is quoted. The chapter "Marking, packaging, transportation, storage" is rewritten, and the basic standard B6147-1992 is quoted. Considering the characteristics of the industry, this standard has made major changes to "Inspection and Measurement". The original professional standard 7BY022-1981 of the People's Republic of China is abolished at the same time. This standard is proposed by the China Machine Building Industry Federation. This standard is under the jurisdiction of the National Testing Machine Standardization Technical Committee. The drafting unit of this standard is Changcun Testing Machine Research Institute. This standard was first issued in December 2012 with the professional standard number 2BY022-1981. Scope
Technical conditions for tension and compression fatigue testing machines
JB/T 9397--2002
This standard defines the technical requirements, test methods, inspection regulations and marking, packaging, transportation and storage of tension and compression fatigue testing machines. This standard is applicable to electronic measurement, force-controlled tensile fatigue testing machines (hereinafter referred to as testing machines) for metal testing with a maximum dynamic force of ±1000N and a frequency not exceeding 4000KH%. This standard is also applicable to testing machines used in special conditions (such as high and low temperature, corrosive properties) and with attached devices (such as condensation control devices), but this standard does not specify these special conditions and attached devices. 2. Normative references || tt || The clauses in the following documents become the clauses of this standard through reference in this standard. For all references with a date, all subsequent amendments (excluding errata) or revisions are not applicable to this standard. However, according to the technical standards, The parties to the agreement shall use the latest version of these documents. For any undated referenced documents, the latest version shall apply to this standard. CB2611-1992 General technical requirements for testing machines JB/T6147-1992 Technical requirements for packaging, packaging marking and storage of testing machines 3 Technical requirements
9.1 Working conditions
The whole test machine shall be able to operate normally under the following conditions, with an ambient temperature of 10~35℃:
6) The relative air density shall not exceed 85%:
c) Install vertically or horizontally on a solid foundation: The fluctuation range of the power supply voltage shall be within ±10% of its rated value: Especially away from dynamic and noise sources.
3.2 Static force indication error
The maximum allowable value of the static force indication error of the testing machine shall be 0.2 of the full scale of each gear or ±1% of the indication, whichever is greater. 3.3 Dynamic force indication fluctuation
3.3.1 For testing machines with a dynamic force range of less than 100kN, the average dynamic force indication fluctuation shall be within 1% of the full scale of each gear test range; for testing machines with a dynamic force range of less than 100kN, the average dynamic force indication fluctuation shall be within 2% of the full scale of each gear. 3.3.2 The dynamic force amplitude fluctuation of the testing machine shall be within 2% of the full scale of each gear. 3.4 Coaxiality of upper and lower chucks
3.4.1 For testing machines, when the distance between the upper and lower chucks does not exceed 200mm, the coaxiality of the upper and lower chucks shall not exceed 0.2mm. 3.42 When the distance between the upper and lower heads of the test machine exceeds 200mm to the maximum distance between the heads, the coaxiality of the upper and lower heads should not exceed 0.1% of the distance between the heads. 3.5 The frequency characteristics
test machine should work properly within its final frequency characteristics range. 3.6 When the dynamic waveform
test machine is working, the dynamic force waveform should not have obvious distortion. 3.7 The specimen chuck
The specimen chuck of the test machine should be full of quality:
) During the test process, the specimen can be held reliably: b) After the test force is applied, there is no fast change in the part in contact with the specimen. JB/T9397—2002
c) The parts such as the block, the pressure bar and the neck block can be interchanged. 3.8 The test number potential of the aging counter
test machine shall not be less than 9×10 times. During the acid test, the counter should work continuously and reliably: the counter stops counting after the sample is broken and retains the counted times. 3.9 Super Test Force Performance
After the test machine breaks the sample under a super test force of 110% of the maximum static force, all parts of the test machine should be intact. 3.10 Safety protection device
The testing machine should automatically stop after the sample is broken. 3.11 Transport shock resistance
The testing machine should be able to withstand the transport test without damage under packaging conditions. After the test, the test power should not be adjusted and should also meet the requirements of this standard.
3.12 Other parts
3.12.1 The movable parts of the testing machine (such as the moving crossbar, screws, etc.) should move freely. 3.12.2 The fixed parts of the testing machine (such as the moving crossbar locking parts, fastening bolts, etc.) should not be loose during the test. 3.12.3 The indication and recording instruments of the testing machine should clearly indicate and record: 3.12.4 The buttons and switches of the testing machine should be flexible and reliable. 3.12.5 All monitoring, alarm and safety protection devices of the testing machine should be sensitive and recordable. 3.12.6 The hydraulic system of the testing machine should not be leaking (oil, stagnant water, air leakage). 3.13 Other requirements
The breather equipment and appearance quality of the testing machine should comply with the requirements of Chapter 6 and Chapter 8 of GB/2611-1992. 4 Test method
4.1 The test object
or the test machine should be inspected under the conditions specified in 3.1. 4.2 Inspection instruments, tools and measuring tools
0.3 grade standard dynamometer corresponding to the full range of each force of the acid test machine: ay
Testing machine E, lower chuck same degree picking tool (including dial indicator): double line indicator
d) Test history or sample and other general tools and measuring county. 4.3 Determination of static force indication error
4.3.1: Select the corresponding 0.3-level standard force measuring instrument according to the full strength of each force level. 4.3.2 Measure 6 points of force for each force level, i.e., 10%, 20%, 40%, %, %, and 100% of the force level.
4.3.3 Measure each point three times. 4.3.4 During measurement, use increasing force until the 0.3-level standard force reaches the specified force value. Read the value on the force indicator of the testing machine and calculate the static force indication error according to the following formula: When the test force is not less than 20% of the full strength of each force level, the static force indication error is 4. Calculate using formula (1): 4.
When the test force is lower than 20% of the full scale of each gear, the static force indication error is 9, calculated according to formula (2): FF
Wherein;
The arithmetic average of the force indications F of the force indicating device of the tested test machine at the same point for three times, the standard force is the standard value of the force indicated by this range, and the measured force value of each gear of the test machine. JB/T9397—2002
The initial measurement can also be carried out according to the following method to avoid increasing the force so that the testing machine reaches the set value and reads the value on the 0.3-level standard dynamometer. The static force indication error is calculated according to the following formula
When the test force is not less than 20% of the full scale of each gear, the static force indication error is 9, calculated according to formula (3), FF
When the test force is lower than 20% of the full scale of each gear, the static force indication error is 9, calculated according to formula (4) FF
Wu Zhong:
H--Inspect the process indication of the force indicating device of the testing machine: F is the arithmetic mean of the three process indications F of the standard dynamometer at the same measuring point. 4.3.5 The results of each measurement and calculation shall comply with the provisions of 3.2. 4.4 Determination of the dynamic force indication speed
4.4.1 The determination of the fluctuation of the dynamic force indication shall be carried out under the following conditions: a) The waveform of the force is:
b) The force cycle is a two-way asymmetric cycle, and the upper and lower peak values of the force are 60% and 20% of the maximum dynamic force of the test machine respectively; d) The inherent frequency of the specimen is more than 2 times the working frequency of the test machine, and has good rigidity and fatigue characteristics; 4.4.2 The test duration shall not be less than 8h. The time for adjustment due to unstable force value after starting the machine shall not exceed 30n, and shall not be counted in the test duration: Tooth test force is not allowed during the test duration. The upper and lower peak values of the force (or average dynamic force and dynamic force amplitude) shall be recorded every 1 second. 4.4.3 For testing machines that directly measure the upper and lower peak values of force, calculate the dynamic force indication according to formula 5) to formula (12): 1F = dynamic force indication F+F
average dynamic force
dynamic force
the arithmetic mean value of dynamic force
FM
F, the arithmetic mean value of dynamic force
FM
standard error of average dynamic force indication
2(FF)
(10)
JBI9397—2002
dynamic force amplitude
where:
the upper and lower values of the dynamic force to be measured: 34
Fthe average dynamic force and dynamic force amplitude to be measured, - number of measurements:
the maximum force value of each full range of the testing machine's force level×100
4.4.4 For testing machines that directly indicate the average dynamic force and dynamic force, the dynamic force indication fluctuation is calculated according to formula (13) to formula (18): ★ The arithmetic mean value of
H
F
F
Average dynamic force indication fluctuation
Dynamic force insertion fluctuation
Ugly × 1%
+ × 100%
The average or full-scale value F recorded when the testing machine is running"--the full-scale value of the force bottle at that gear when the testing machine is running. The rest of the symbols are 4.4.3.
4.4.5 The fluctuation of the measured dynamic force indication shall comply with the provisions of 3.3. 4.5 Determination of the same degree of upper and lower heads
4.5.1 The rigidity of the upper and lower heads of the testing machine The inspector sees Figure 1. Come up: 2
Thank you for the test tape; 3
Level meal delivery: 7-
Self-dividing meter: 4
Lower support: 5
Fixed meter stand; 5
Turn the meter stand:
Clamping spacing:
One hundred old spacing,
JB/T9397—2002
4.5.2 Make L= 200mm and / = [000mm, rotate the rotating frame for one circle, and record the dynamics of dial indicator a and b. Then loosen the test sample and the dial indicator stand, rotate 120, clamp again, and repeat the above measurement. 4.5.3 Let L = 500mm, = 4001ml, and measure in the same way as 4.5.2. 4.5.4 The larger half of the two dials measured each time is sample 1: The coaxiality of the lower burner. Each test result shall comply with the provisions of 3.4.
4.6 Test of amplitude-frequency characteristics
4.6.1 The test of amplitude-frequency characteristics of the testing machine shall be carried out under the following conditions: a) The dynamic force waveform is a positive wave; b) The dynamic cycle form is a symmetrical cycle; and the specimen has good fatigue characteristics. 4.6.2 Under the conditions of 4.6.1, the testing machine shall be operated at the maximum working frequency that can be achieved by the large dynamic force and the corresponding normal work for [h], and visually inspected. Then the testing machine shall be operated at the maximum working frequency and the maximum dynamic force that can be achieved by the corresponding positive work for ih, and observed and inspected.
4.7 Test of dynamic force waveform
The dynamic force waveform of the testing machine shall be inspected with a double-line liquid indicator within the normal working range of the testing machine. 4.B Inspection of chucks
4.B.1 Make a mesh (plate) sample for each of the various specifications of the chuck, so that the size of the clamping part is close to the maximum size specified by the chuck. 4.8.2 Select the block, pressure cap, door top block, etc. 4.83 The test force should reach 80% of the maximum force of the test machine at least once. 4.8.4 Under the above conditions, make a tensile test for each sample, and then test it according to the requirements of 3.4.9 Inspection of counters
Under the condition of % of the maximum dynamic range of the test machine, select a corresponding round sample and make a short-time symmetrical cyclic stress fracture test at the highest frequency that can be achieved during normal operation, and test the counter of the test machine according to the requirements of 3.8. 4.10 Inspection of super-test force performance
Select the sample, so that it is pulled apart under the super-test force close to 110% of the maximum static range of the test machine, and then test all parts of the test machine. 4.11 Inspection of safety protection device
The inspection of the safety protection device of the testing machine shall be carried out at the same time as the inspections in 4.9 and 4.10. 4.12 Inspection of transport bump resistance
In the packaging condition, the testing machine shall be mounted on the rear of a vehicle with a load capacity of not less than 4t and driven on a medium-grade road of a 100km highway at a speed of not less than 25kmh for more than 100km. Then the inspection shall be carried out. The requirements of 3.11 shall be met. 4.13 Inspection of other components
The components of 3.12 shall be self-inspected as required. 4.14 Inspection of other requirements
The requirements of 3.13 shall be inspected by actual measurement or daily test in accordance with the provisions of Chapter 6 and Chapter 8 of GH/T2611-1992: 5 Inspection rules
5.1 Factory inspection
5.1.1 The inspection items include 3.2, 3.3, 3.4, 3.5, 3.6, 3.7, 3.8, 3.9, 3.10, 3.12 and 3.13 5.1.2 Each test machine shall be inspected and qualified by the manufacturer's quality inspection department according to the factory inspection items before it can be shipped out, and shall be accompanied by a product certificate
5.2 Type inspection
52.1 Type inspection includes all requirements of technical standards 5.22 Type inspection shall be carried out when any of the following situations occurs 5
JB/T9397—2002
3) Trial finalization and identification of new products or old products transferred to the factory for production, b) Type production, when the structure and materials are , when there are major changes in the process that may affect product performance: During normal production, an inspection should be carried out once a year: After a long period of serial production, when the product resumes production
When there is a significant difference between the factory inspection results and the previous type inspection: When the national quality supervision and inspection agency finds that the type inspection requirements are inferior: 5.3 Judgment criteria
5.3.1 For factory inspection, each product shall be inspected according to the specified inspection items, and the qualified rate shall reach 10%. 5.3.2 For type inspection, when the batch is not more than 150 units, two samples shall be taken, and the qualified rate shall reach 10%. If one unqualified product appears in the sample after inspection, the batch of products shall be determined as unqualified. When the batch size is 50 units, five units are sampled. If one or more unqualified products appear in the sample after inspection, the batch of products shall be determined as unqualified. wwW.bzxz.Net
Marking, packaging, transportation and storage
6.1 The test machine shall have a nameplate, including: a) name and model:
b) main parameters:
name of manufacturer:
d) date of manufacture:
e) manufacturing number.
6.2 For products that implement this standard, the number and name of this standard shall be marked on the product packaging or product manual: 63 The waterproof, rust-proof and dust-proof protective equipment of the test machine shall also comply with 4.4 of B/T61471992.1. 4.4.4, 4.4.6 and the provisions of Chapter 5 and Article 6 of the General Rules
6.5 The random technical documents of the testing machine shall comply with the provisions of Article 9 of G0T2611-1992. 6
JB/T9397-2002
3) Trial type identification of new products or old products for transfer to factory production, b) When there are major changes in structure, materials, and processes that may affect product performance: During normal production, an inspection should be carried out once a year: After a long period of serial production, when the product resumes production
When the factory inspection results are significantly different from the above type inspection: When the national quality supervision and inspection agency finds that the type inspection requirements are insufficient: 5.3 Judgment criteria
5.3.1 For factory inspection, each product shall meet the specified inspection items, and the qualified rate shall reach 10%. 5.3.2 For type inspection, when the batch is not more than 50 units, take two samples, if one unqualified product is found in the sample after inspection, the batch of products shall be determined as unqualified; when the batch is more than 50 units, take five samples, if one or more unqualified products are found in the sample after inspection, the batch of products shall be determined as unqualified.
Marking, packaging, transportation and storage
6.1 The test machine shall have a nameplate, including: a) Name and model:
b) Main parameters:
Manufacturer's name:
d) Date of manufacture:
e) Manufacturing number.
6.2 For products that implement this small standard, the number and name of this standard shall be indicated on the product packaging or product instructions: 63 The test machine shall be waterproof, rust-proof, and dust-proof. 6.4 The packaging, bag marking, and storage of the test machine shall comply with the provisions of 4.4.1, 4.4.4, 4.4.6 and Chapter 5 and Section 6 of B/T61471992.
6.5 The random technical documents of the test machine shall comply with the provisions of Section 9 of G0T2611-1992.
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