Safety helmet tensile testing machine

Safety helmet tensile testing machineConstruction steel: steel bars (steel plates), steel pipes, cast iron pipes, steel bar connection joints, welds and deposited metals, aluminum alloy types, carbon structural steel, elongation testing of low-carbon steel hot-rolled disc bars yield strength, elongation testing of steel wires for prestressed concrete, elongation testing of steel strands for prestressed concrete, and welding of elongation steel bars under maximum force.

Safety helmet tensile testing machine

This standard specifies the main parameter system of an electronic universal testing machine that uses mechanical force and electronic measurement technology to measure mechanical performance parameters

Column, technical requirements, inspection methods, inspection rules, labeling and packaging, etc.

This standard is applicable to electronic universal testing of mechanical properties such as tension, compression, bending, and shear for both metallic and non-metallic materials

Testing machine (hereinafter referred to as testing machine).

This standard also applies to electronic tensile testing machines and electronic pressure testing machines.

2 Normative References

The clauses in the following documents become clauses of this standard by reference. Any referenced document with a date shall be followed by all subsequent references

The amendment form (excluding errata) or revised version is not applicable to this standard. However, all parties who have reached an agreement based on this standard are encouraged to study it

Can new versions of these files be used. Any referenced document without a date shall apply to the new version of this standard.

GB/T 2611-2007 General Technical Requirements for Testing Machines

GB/T 13634-2008 Calibration of standard force gauges for inspection of uniaxial testing machines (ISO 376:2004, Metallic materials cal)-

ibration of force-proving instruments used for the verification of uniaxial testing machines,IDT)

GB/T 16825.1-2008 Inspection of static uniaxial testing machines Part 1: Inspection of force measuring systems for tensile and/or compressive testing machines

ISO 7500-1:2004, Metallic materials Verification of static uniaxial testing machines-

Part 1:Tension/compression testing machines-Verification and calibration of the force--measuring

system,IDT)

GB/T22066-2008 Evaluation of Computer Data Acquisition System for Static Uniaxial Testing Machine

JB/T 6146-2007 Technical conditions for extensometers

JB/T6147-2007 Technical Requirements for Packaging, Packaging Marking, Storage and Transportation of Testing Machines

3 Terms, definitions, symbols, and explanations

3.1 Terminology and Definitions

The following terms and definitions apply to this standard,

3.1.1

Resolution resolution

The instrument represents the ability of the indicating device to meaningfully distinguish between two adjacent values of the indicated quantity.

[GB/T 13983-1992, Definition 4.52]

3.1.2

Discrimination threshold

Generate a small input change that is perceptible in response to the indicated value of the testing machine.

3.2 Symbols and Instructions

The symbols, units, and explanations used in this standard are shown in Table 1

Common faults and troubleshooting

After the above investigation, the equipment malfunction cannot be ruled out. Please contact our company's after-sales hotline in a timely manner and have our professional technical personnel assist in resolving the issue. It is strictly prohibited for users to open the equipment for maintenance without authorization. If the equipment is opened for maintenance without authorization, our company will not be held responsible for any consequences.

Regarding instrument warranty: 1. Beiguang Instrument guarantees that the equipment provided is brand new and meets all relevant product technical requirements. 2. After the equipment is accepted by the customer and qualified, the warranty period begins to be calculated. The free warranty period for the equipment is one year. During the quality warranty period, if the product is not damaged by human factors, Beiguang Instrument is responsible for full coverage. The customer service of Beiguang Instrument will respond within 24 hours after receiving the notification and arrange the agreed repair details. 3. After the warranty period, we will repair and maintain the equipment for you free of charge. Except for large equipment, all equipment will be returned to the factory for repair. After inspection, we will inform the customer by phone of the problem and the solution. After obtaining the customer's consent, we will carry out the repair and send it back to the customer. For damaged or replaced parts, we will only charge a cost fee; If the customer does not agree with our inspection results, both parties will negotiate the repair details separately.

Safety precautions: Before turning on the device, please read this user manual carefully to prevent accidental injury to the operator or damage to the instrument. Before operation, please read "Installation and Settings" to ensure the correct installation and connection of all components of the instrument. Before the operation, it is necessary to seek guidance from experienced personnel to prevent accidental incidents caused by misoperation. Electric shock hazard: Ensure that all wires are powered off before installing or repairing the instrument to prevent injury to personnel or equipment when energized.

according to the standard

GB/T2611 Testing and General Technical Conditions and "Electronic Universal Testing Machine"

GB/T 16491-2008/Standard Manufacturing;

Complies with relevant standards such as GB/T2792, JB/T2872, GB/T10424, GB/5319, etc;

According to GB/T12160 and GB/T16825 for verification and acceptance;

This standard replaces GB/T16491-1996 "Electronic Universal Testing Machine".

The main changes between this standard and GB/T16491-1996 "Electronic Universal Testing Machine" are as follows:

The scope has been expanded to include "electronic tensile testing machines" and "electronic pressure testing machines" in this standard (1996 edition)

Chapter 1; Chapter 1 of this edition:

One term was deleted one by one (3.1 in the 1996 version);

Part of the content of "Table 1 Symbols" has been modified (Table 1 of the 1996 version: Table 1 of this version):

Revised the content of the main parameter series one by one (Chapter 4 of the 1996 edition: Chapter 4 of this edition):

The two levels of Level 2 and Level 3 in the classification of testing machines have been cancelled (5.2 in the 1996 version; 5.2 in this version);

Revised the requirement for coaxiality of large capacity testing machines not exceeding 5kN (5.3.2.1 in the 1996 version and 5.3.2.1 in this version);

The requirement for the hardness of the bending indenter and its two supports has been added (5.3.4.1 in the 1996 version; 5.3.4.1 in this version):

The regulation allowing the movement of horizontal beams for graded speed regulation and corresponding grading number system has been cancelled (5.3.5.2 in the 1996 version; 5.3.5.2 in this version);

Revised the regulations for the relative error index and speed detection time of the 0.5 level testing machine one by one (5.3.5.3 and 6.3.7 in the 1996 version)

5.3.5.2 and 6.3.9 in this version;

The content related to calibration value drift and recording devices has been deleted (5.4.1.4 and 5.4.3 in the 1996 version; 5.4.1.4 in this version):

Revised the technical indicators and calculation methods for zero relative error, differential force valve, zero drift of the force measurement system (version 5.4 of 1996)

6.4: Sections 5.4 and 6.4 of this version:

Regulations on technical requirements and measurement methods for control systems have been added (5.7 and 6.7 in this version):

The technical requirements and testing methods for computer data acquisition systems have been added (5.8 and 6.8 in this version);

One by one, the technical specifications of the extensometer have been modified, and the requirement for the resolution of the extensometer has been added (5.5 in the 1996 version: 5.5 in this version):

Revised the technical requirements for electrical equipment and assembly quality, and added regulations on mechanical safety (5.9 of the 1996 version);

Version 5.9 and 5.13):

Revised the accuracy requirements for the coaxiality automatic detector one by one (6.2 in the 1996 version; 6.2 in this version):

-Part of the content regarding coaxiality testing of the testing machine has been modified (6.3.1 in the 1996 version; 6.3.3 in this version);

Appendix A (1996 version of Appendix A) has been cancelled.

The national standards for metal mechanics test methods related to this standard mainly include:

GB/T228 "Tensile Test Method for Metallic Materials at Room Temperature"

GB/T232 "Bending Test Method for Metallic Materials"

GB/T7314 "Test Method for Room Temperature Compression of Metallic Materials"

This standard was proposed by the China Machinery Industry Federation.

This standard is under the jurisdiction of the National Technical Committee for Standardization of Testing Machines (SAC/TC122),

The drafting unit responsible for this standard is Changchun Testing Machine Research Institute Co., Ltd.

This standard was drafted by Jinan Touching Group Co., Ltd., Shanghai Hualong Testing Instrument Co., Ltd., and Chengde Jinjian Testing Instrument Co., Ltd

Limited company, Zhejiang Jingyuan Machinery Equipment Co., Ltd., Chengde Precision Testing Machine Co., Ltd., Changchun Zhonglian Testing Instrument Co., Ltd.

The main drafter of this standard; Zhang Jinwei, Sun Shanye, Zhao Youjie, Zhang Xiangling, Jia Libei, Wang Xinhua, Shao Chunping.

The previous versions of the standards replaced by this standard have been released:

GB/T16491-1996。 Electronic universal testing machine

scope

This standard specifies the use of mechanical force. The main parameter system of an electronic universal testing machine using electronic measuring basket technology to measure mechanical parameters with good performance

Column, technical requirements, inspection methods, inspection rules, labeling and packaging, etc.

This standard is used for electronic testing of mechanical properties such as mating, compression, bending, and cutting of metal materials and abundant metal materials

Testing machine (hereinafter referred to as testing machine).

This standard also applies to electronic force testing machines and electronic pressure testing machines.

2 Normative References

The clauses in the remaining document become the reference of this standard. Zha is a reference file with a date, select all subsequent ones

The amendment form (excluding errata) or revised version is not applicable to this standard. However, it is encouraged to reach an agreement based on this standard

Whether to use the new version of these documents or not, the new version of any referenced document without an expiration date shall apply to this standard.

GB/T 2E11-2007 General Technical Requirements for Testing Machines

(B/Y13634-18000/180076. 2004 Single axis (calibration of standard traceability instrument for testing machine inspection) (1S0376s2004, Metallte)

mnterials-calibrntion of force-proving instruents ased for the verification of uniaxial

teaiing nuchines, IDT);

GB/T 16825.1-2002/IS07500-1:2004 Inspection of Static Uniaxial Dyeing Machines Part 1: Tension and/or Pressure

Inspection and Calibration of Testing Machine Force Measurement System (1S0) 7500-1: 2004, Metallie Materials - Verification of Statte

uniaxial testing machines--Pert I: Tension/compressiom teating machines-Verification and

calibnaticn of the foree--measuricg syates, mn

GR/T22066-2008 Evaluation of Computer Data Acquisition System for Single Axis Testing Machine

JB/T6146-2007 Technical Conditions for Stretchers

JR/T6147-2007 Testing Machine Packaging, Packaging Marking, Storage and Transportation Technical Requirements

3 Terms, definitions, symbols, and explanations

③ 1. Shu Xi and Definition

The following terms and definitions apply to this standard.

311

Resolution Reaolutian

The indicator device has the ability to meaningfully distinguish between two adjacent values of the indicated quantity.

[GB/T13983-1992. Constant variation 4.521]

3.1.2

Make the indicator of the testing machine generate a small observable change response.

Discrimination Threaheld

3.2 Symbols and Instructions

The symbols, units, and instructions used in this standard are shown in Table 1. Calculation 2. The timing of the preparation of the accompanying meal and the calculation of the divine meal are consistent with the discussion of the ritual and contract system,

Attention, using accurate techniques based on experimental methods and deformation measurement to accurately calculate the sub components of the combination of Midong winter and transparent areas, according to the production propaganda,

Take one of the pastors.

Displacement stripping system

The low resolution of the displacement sensor device for moving the waiting beam is 0.001mm.

5.62 Relative error of displacement indication of moving fruit within the measurement range. The allowed value for people is 0.5%.

5.1 Control System

5.7.1 General Requirements

The control system cell adopts a cluster loop control mode, which should have three control modes: stress, stress, and displacement. During the conversion process of different control modes

The operation of the testing machine should be smooth, without any vibrations or oversights that may affect the test results.

572 stress control

Within a controllable range of stress (force) rates:

For a 0.5 testing machine, the maximum allowable relative error of stress (force) rate is ± 1, and the maximum allowable relative error of stress (force) is maintained

The allowable value is ± 1%;

For a Level 1 testing machine, how many should be added? The allowable value for personnel with relative error is 2 pieces, and (force) should be added to maintain the allowable value for personnel with relative error

The value is ± 2%.

Manufacturers should provide the stress (force) rate range that the entire machine can control in the product manual or technical documents.

5.7.3 Strain (deformation) control

Within the scope of controllable strain (deformation) invitation:

The maximum allowable value for the relative error of the construction rate of the testing machine should be 1%, and the relative error of the deformation should be maintained

The maximum allowable value is ± 1%;

For a two-stage testing machine, the maximum allowable relative error of strain (deformation) rate is ± 2%, and the strain (deformation) maintains a relative humidity difference

The maximum allowable value is ± 2%,

Manufacturers should provide the strain (deformation) speed range that the testing machine can control in the product manual or technical support.

5.8 Computer Data Collection System

3.81 The frequency bandwidth of the sensing and reporting channel should meet the requirements of A22 in GBT 22366-3008

5.8.2 The scattered data collection rate should not be less than 15 ts (effective collection points).

5.8.3

During the evaluation of the experimental model, hardware update design, and software monthly level, it should be evaluated in accordance with GB/T22066-2008

The result should comply with the riddle in section 5.2 of GBT 220662008.

5.9 Electrical Equipment

Electrical equipment shall comply with the provisions of Chapter 7 of GB/T 2611-2007

5.10 Safety protection device

510.1 The testing machine should have a force overload protection device. When the applied force exceeds 25-10% of the machine's large capacity, it becomes a protective device

Ensure that the testing machine automatically shuts down.

5.10.2 The testing machine should have a protective device for exceeding the limit position of the moving crossbeam. When the crossbeam needs to be moved to the set upper and lower limit positions, the limit teaching should be applied

Immediately move the house to stop moving automatically.

During the testing process, when the specimen breaks, the testing machine should automatically stop or return to the set mode before stopping. 511 Sleeping Sounds

The mute sound level during the operation of the testing machine should not exceed 70dB (A) for testing machines with a large capacity less than 500KN

The testing machine with a capacity of not less than 500kN should not exceed 75dB (A).

5.12 Resistance to Transportation and Drying Performance

Under packaging conditions, the testing machine should be able to withstand transportation shaking tests without damage. After the test, the testing machine should not be adjusted or repaired (excluding operation procedures)

Normal adjustments allowed by the procedure shall still comply with all technical requirements of this standard.

5.13 Other requirements

The basic requirements, assembly quality, mechanical safety protection, and appearance quality of the testing machine comply with Chapter 3 of GB/T2611-2007.

The provisions of Chapter 4 and Chapter 10.

6 Inspection and transportation methods

6.1 Inspection conditions

The testing machine should be tested thoroughly under the environmental and working conditions specified in 5.1. Temperature waves during the inspection of force measurement systems and extensometers

The range of motion should not exceed 2 ℃.

62 Inspection tools

Under the knowledge of standard instruments, measuring tools, and gauges used for testing machines,

a) Special inspection for measuring instruments or forces that meet the requirements of GB/T 13634-2000, with accuracy within ± 0.1%

The coaxiality automatic tester with a maximum allowable measurement error of 2% (equivalent to other measuring and recording equipment with comparable end accuracy) or the following instructions:

c) Surface roughness tester:

4 Rockwell hardness tester

e) A second roll with a dividing force of 1/100s:

D (0-30) mm one-way level 1 dial gauge, (0-1) mm range level 1 dry gauge and magnetic gauge holder, 1000mm measurement

Cheng Da allowed a steel ruler with a deviation of 0.2mm:

2002mm/m level

h) Level 2 speech meter:

The extensometer calibrator that complies with JB6146-2007 6.21:

D insulated electric pulse killing device:

k) Voltage endurance test position:

D General measuring tools:

Steel made plain and powder test specimens for axial testing (with a gauge length of not less than 100mm, and a diameter of 10mm212ma for the gauge length section)

The coaxiality between the gauge length and the two ends is 0.02mm,

The number of samples should be the same as the number of sets of force jaws, and the cross-sectional size of the samples should be suitable for various solid and plate samples

The tension jaws.

6.3 Testing of the Force Application System

Before conducting force value testing, the general working performance of the testing machine should be tested according to 6.3.2. Only when the testing machine is in good condition can it be tested

The status of the workpiece can only be used for subsequent filling and inspection.

6.3.2 Install a tension release test on the testing machine (fortunately, the sample undergoes plastic deformation after applying a large test rotation force of the testing machine), and then slowly apply force to the sample until the testing machine exerts a strong force, and then slowly remove it. During the process of applying force, check 5.3.1 and perform on-site testing to verify 5.3.2.2.

633 Choose one of the following two methods to test the axial alignment of the force application system based on the large capacity of the testing machine. If the testing machine is equipped with multiple sets of clamps,

Each clamp should be inspected separately.

For testing machines with no more than multiple IN, use the double understanding method for inspection. When inspecting the side, use a double regret at the center of the upper head, and the center of the double understanding is

The inter axial deviation of the center of the Bu prize head should exceed 2mm/500mm:

For testing machines larger than 5IN, use the coaxiality tester specified in 6.2b) (or other corresponding measuring devices with approximate accuracy)

Test the coaxiality test sample specified in 62m. During testing, hand over the coaxiality test sample to the corresponding historian,

Install the deformation measuring device of the coaxiality automatic tester between the gauge lengths of the inspection sample, and add 1% of the testing machine along with it

The initial force is measured at five points in order under different test forces within the range of 2% to 4% of the testing machine's maximum force

The elastic deformation of the sample on both sides is measured twice in the mutually perpendicular direction. The force used in the inspection should not exceed the inspection limit

Test the elastic limit of the specimen.

Calculate the coaxiality e according to formula (1):

..

--- -*…----------

.-----. ..+. .. 《 1 》

The results of each test should meet the requirements of Table 4.

6.3.4 If possible, conduct a tensile test on a test rod using at least 80% of the testing machine's force for each type of clamp's large jaw,

The fire holding of the needle opening and the lifting injury of the jaw should be inspected in the room, and the inspection results should meet the requirements of 5.3.2.3. Simultaneously conduct regular inspections on 5.10.3,

6.35 Conduct actual or on-site measurements to check 5.3.24, 5.33.1, 5334.5.3.2, and 5343

The roughness of the working surface of the 6.36 pressure plate shall be tested using the surface roughness tester specified in 6.2c), and the results shall meet the safety requirements of 3.3.3.2.

The hardness of the pressure head and two supports of the 637 compression test equipment for Xiao Jue Ban and bending test shall be stabilized using the Rockwell hardness tester specified in 6.2d)

Test and meet the relevant requirements of 5.3. and 53.4.1.

The levelness of the ammonia moving crossbeam for 3 days should be tested using the level gauge specified in 6.2g. When testing, place the level gauge in the middle of the cooking process and move the crossbeam

At least four positions within the range of motion should be tested, and the results should meet the specific requirements of 5.3.5.1.

The detection method for the moving speed of the 63 day precision beam is as follows,

Select five or more measurement points within the nominal speed range of the crossbeam movement of the testing machine (speeds below 0.00mm/min may not reach the limit)

Use a stopwatch and select a dial gauge, a dial gauge, or a steel ruler to measure the speed according to the corresponding height. Corresponding to different horizontal fruit movement speeds

The range of degrees and the specified time for deep detection of the distance of the bond beam movement are shown in Table 8. During the detection, the time of each detection and the corresponding distance of the beam movement should be recorded, and each speed measurement point should be tested three times.

The relative error w of the horizontal beam movement speed is calculated according to formula (2):

x100*******-****. ..---------…()

The inspection results should be laid in plain packaging according to 3.3.5.2.

The movement speed and allowable test force of the 310 bed beam can be tested by conducting controlled extension or compression tests on the test rod. When testing, the root should be torn off

The large capacity of the testing machine or the cutting of samples for force testing under the condition of the mold moving at a speed greater than or not greater than 50mm/min, respectively

The test results should meet the requirements of 53.5.3.

Testing of 64 force measurement system

641 Observation Inspection and Resolution Determination

Through actual experiments (conducted in combination with other testing methods), during the testing process, measurements were conducted to check 5.4.1.1, $4.1.3, and 054.1.4

Resolution of force indicator device. The motor and control system of the testing machine should be started, and under zero test force, according to 5412

It is stipulated to make judgments through observation and calculation.

6.4.2 Instant De transfer detection

After preheating for a specified time, the testing machine should be kept in good working condition. If there are multiple criteria for the child storage circumference of the system, then it should be placed in the small category

The gear of the measurement range should meet the requirement of 54.1.9 when detecting zero point shift within the specified time.

Dot transfer: Calculate according to formula (3):

*x100*…-----. ------

......(3)

Detection of allowable errors and relative resolution for 643 items

The allowable errors of the testing machine force shall be tested using a non compliant standard measuring instrument (with a dedicated inspection code). Root suppression during testing

According to the level of the testing machine, correctly select the green color of the standard force measuring instrument, so that the maximum allowable value of the visual measurement error of the measuring instrument is not greater than the force of the acid testing machine

The value error is one-third of the allowable value. The relative separation force of the testing machine's force measurement system. I have a relatively poor understanding of the letter. The relative packaging difference of the frying and rehydration properties is indicated

Check the relative pot difference and core according to the method specified in B/T16825.1 for the operation and indication of the return journey. Zero point relative error name. Calculate according to formula (4).

All test results should be calculated in accordance with 9.4.2.

Light * ...***. .....-. *******<(4)

4.4 Testing of Signatory Strength

The whole square threshold of the system measured by the testing machine is tested using the following method:

In the zero test force state, there should be at least one numerical increment change after applying a force of 0.25% feet to the woman.

General requirements for measuring extensometers using a shape measurement system. All allowable errors and resolutions shall be tested according to the methods specified in Chapter 6 of JBT6146-2007. Its conclusion

Lingying meets the requirements of 55.2 and 5.5.3 respectively.

Detection of 66 displacement measurement system

6.1 Check the resolution of the beam displacement measurement system and ensure that the results meet the requirements of 5&1.

6.9.2 The relative humidity difference of the displacement measurement system for the beam shall be detected using the active measuring tool specified in 6.2D. During inspection, move the precision beam