HG 2116-1991 Conventional International Rubber Hardness Tester High Hardness HG2116-1991 Standard Download Decompression Password: www.bzxz.net

Chemical Industry Standard of the People's Republic of China
HG21162118-91
Conventional International Rubber Hardness Tester
1991-08-19 Release
Ministry of Chemical Industry of the People's Republic of China
1992-01-01 Implementation
1IG2116-—91 Conventional International Rubber Hardness Tester HG2117-91 Conventional International Rubber Hardness Tester 11G2118-91
Conventional International Rubber Hardness Tester
High Hardness
Medium Hardness
Low Hardness
(1)
Chemical Industry Standard of the People's Republic of China
Conventional International Rubber Hardness Tester
1 Subject Content and Scope of Application
High Hardness
HG2116-91
2c/031
This standard specifies the technical conditions, inspection rules and markings of conventional international rubber hardness testers (high hardness). Packaging, transportation, etc. This standard is applicable to the conventional international rubber hardness tester (high hardness) used to determine the international hardness value of vulcanized rubber and rubber-like materials. The test hardness range is 85-100 TRHD
2 Reference standard
GB11207 Determination of high hardness (85~100 IRHD) vulcanized rubber hardness 3 Technical requirements
3.1 Basic parameters
Test range: 85~100 IRHD
b. Accuracy: 1 IRHD
3.2 Working conditions
Ambient temperature: 10~40℃ for normal test, 23±2℃ for standard test; Relative humidity: 10%~60%;
Non-corrosive gas is used weekly;
AC voltage: 220V±10%:
The instrument is placed on a horizontal hard work surface, and a 2mm rubber sheet c can be placed between the instrument and the work surface.
3.3.1 The pressure head is replaceable and can be replaced and updated according to the needs of use. The connection thread of the pressure head is M33.3.2 The pressure head is a sphere, and the spherical surface of the top that is greater than three-quarters of the way to the center of the sphere is the working surface, which should meet the following requirements: a. Head: S@1±0.01mm;
b. Roughness Ra: minimum F0.8μm;
Hardness: not less than HRc50.
3.4 ​​Pressure foot
3.4.1 The foot is replaceable and can be replaced according to the needs of use; its connection thread is M14×1.5.3.4.2 The annular working surface of the pressure foot should meet the following requirements: a: The working surface is perpendicular to the center line of the connection thread. Straightness less than 0.02; b. Surface roughness Ra: less than 1.6μm; c. Inner diameter of annular hole: Φ6±2mm;
d Outer diameter of annular hole: @20±2mm,
3.5 Indenter indentation depth detection mechanism
The indenter indentation depth detection of the hardness tester can be detected by a dial indicator or a displacement sensor and a matching secondary display instrument, but it should comply with the following regulations: www.bzxz.net
Approved by the Ministry of Chemical Industry of the People's Republic of China on August 19, 1991 and implemented on January 1, 1992
HG2116-91
a. Detection accuracy: not less than 0.014mm per millimeter; b. Measuring range: not less than 6mm;
c. When using a dial indicator, the dial diameter is greater than @80mm, and the dial is scaled according to the conversion table specified in Appendix A of GB11207. The hardness tester's dial gauge has a travel of 1mm per revolution; d. When using a displacement sensor, it is best to convert the difference in the indentation depth into an international rubber value for display, and the accuracy should comply with 3.5a.
3.6 Force value
The various force values ​​of the hardness tester should comply with the relevant provisions of GB11207. 3.7 Guide device
The guide device allows the pressure head and the pressure foot to move relative to each other perpendicular to the base surface. If the base surface is a plane, the maximum distance of the pressure foot falling on the base surface should be less than 0.06mm.
3.8 Spindle system accuracy
Through multiple measurements of the base surface, the dispersion of the hardness tester head indication is less than 0.005mm. 3.9 Oscillator
3.9.1 The oscillator should produce slight vibration when working; 3.9.2 The insulation resistance of the oscillator circuit to the ground is greater than 7MQ; 3.9.3 The sound pressure level of the oscillator noise is less than 55dB at 0.5m away from the instrument. 3.10 Transport frequency bump performance
The hardness tester should be able to withstand the temperature changes in nature under the packaging conditions, and have no damage after the transport bump test. After the transport test, it can still meet the standard requirements without repair and debugging.
3.11-Appearance requirements
a. Paint color coordination;
b. No spots or rust on the electroplating.
4 Test method
Test conditions
The test shall be carried out under the conditions specified in Article 3.2 of this standard, but the temperature shall be controlled at 23±2℃. 4.2 Tools, tools and instruments used in the test General tools and measuring tools for related tests;
Digital indicator calibration table
Balance 1000±0.5g
Special force measurement machine
Standard rubber hardness block (40~95IRHD)||tt ||Stopwatch (30min±0.5s)
Megaohmmeter (500V)
Municipal-level meter
Rockwell hardness tester
Surface roughness comparison sample
4.3 Test of meter head
1 piece;
1 unit;
1 piece;
1 set;
1 piece;
1 piece;
1 piece;
1 piece;
1 unit;
1 set.
Place the hardness tester head on the dial indicator calibration table, take at least 6 test points evenly distributed within the indication range of the hardness tester head, and test the standard value and the measured value according to the conversion system in Appendix A of GB11207. The error is not large. 0.014mm4.4 Test of indenter
a: Use a projector or a micrometer to select 8 to 10 square meters on the axial direction of the working sphere of the indenter. The measurement error should meet the requirements of 3.3.2a;
HG2116--91
b. The working surface of the indenter is compared with the surface roughness comparison sample, which should meet the requirements of 3.3.2b; c. The hardness value of the working surface of the indenter is tested with a Rockwell hardness tester, which should meet the requirements of 3.3.2c. 4.5 Force test
4.S.1 Force test of pressure foot
Place the hardness tester on the special base for force measurement, remove the indenter first and then tighten the pressure foot. Let the pressure foot fall slowly on the balance pan, and the force value required to make the pressure foot move slightly upward should meet the requirements of 3.6. 4.5.2 Contact force and total force test of indenter
Place the hardness tester on the special force measurement base, first remove the pressure foot and raise the body to expose the indenter, put a film on the balance pan so that it is directly below the indenter and weigh the film, let the indenter fall slowly on the film, continue to add magnetic codes to the code disk, when the needle rotates slightly (when the hardness tester vibrates slightly), the weight of the code minus the weight of the film is the contact force, continue to add basic codes to the basic code disk, the needle will rotate to a certain position and stop, and then add magnetic codes until the weight of the basic code minus the weight of the film when the needle rotates slightly again is the total force of the indenter, and the contact force and total force of the indenter should meet the requirements of 3.6. 4.6 Indication test
Use the valid international rubber hardness standard block to test the hardness tester to be tested. The standard hardness indication error shall comply with the provisions of 3.1b.
4.7 Guide device test
When the pressure foot falls on the flat base surface, the gap measured with a feeler gauge shall comply with the requirements of 3.7. 4.8 Spindle system accuracy test
The base surface perpendicular to the main axis of the pressure foot shall be tested for no less than 5 times, which shall comply with the provisions of 3.8. 4.9 Oscillator
4.9.1 When testing the hardness, the pointer of the hardness tester shall not jump or rotate. 4.9.2 The insulation resistance test with a 500V megohmmeter shall comply with the provisions of 3.9.2. 4.9.3 The noise measured at 0.5m from the hardness tester shall comply with the provisions of 3.9.3. 4.10 Transportation Bump Test
After the hardness tester is packaged and qualified, it shall be placed on a truck and driven along a Class 3 highway at a speed of 30~40km/h for 200km, and then fully inspected according to this standard.
4.11 Appearance Test
Inspect by visual inspection according to the requirements of 3.11.
5 Inspection Rules
5.1 Each hardness tester shall be inspected and qualified by the quality inspection department and accompanied by a product certificate before it can leave the factory. The main inspection data shall be recorded in the random documents.
5.2 Test items
5.2.1 Hardness tester is divided into factory test and type test. Factory test is carried out item by item in 3.1.3.6~3.9 and 3.11 under the conditions of 3.2 of this standard; a.
b. Type test is carried out item by item in 3.1~3.11 of this standard. 5.2.2. Carry out type test and trial production of new products in the following cases;
b. When major changes in product design, process, or original components may affect product performance: c. Carry out regular inspection;
When the national quality supervision agency proposes type inspection requirements. d.
5.2.3 Sampling
HG2116-91
Spot check once a year, and no less than two units are tested for type test each time. 5.2.4 Judgment rules
a. If there are unqualified items in the factory test instrument, it can be repaired and re-tested. If there are still unqualified items, the product is judged to be unqualified:
b. Type test is carried out on products that have passed the factory test. If one unit fails in the random inspection, it can be repaired once. If it fails again after repair, the product is judged to be unqualified. If two units fail to meet the same item, the batch of products is judged to be unqualified. 6: Marking, packaging, transportation and completeness
5.1 Marking
Each hardness tester shall have a nameplate, which shall include: a. Model and name of the hardness tester;
Manufacturer name or factory mark;
Factory number;
d. Date of manufacture.
6.2 Packaging
The packaging box shall be firm to ensure that it is not damaged during transportation. The space between the packaging box and the hardness tester shall be filled with soft materials. The hardness tester shall be firmly fixed in the box to ensure that it does not move in any direction during transportation. The meter head shall be fixed with soft plastic and placed in the packaging box. 6.2.2
The outer markings of the packaging box should be clear, including: manufacturer name, model and factory number of the hardness tester; consignee and address;
The size and gross weight of the box;
d. "Upward", "Precision Instrument", "Handle with Care", etc. 6.3 Transportation
After the product is packaged, it can be transported by common means of transportation, but rain, snow and mechanical collision should be avoided. 6.4 Completeness
The following documents should be provided with the hardness tester:
Packing list;
Factory certificate;
Instruction manual.
Accessories and tools of the hardness tester,
Additional remarks:
This standard was proposed by China National Chemical Equipment Corporation and is under the jurisdiction of Beijing Rubber Industry Research and Design Institute of the Ministry of Chemical Industry. This standard was drafted by Beijing Rubber Industry Research and Design Institute of the Ministry of Chemical Industry at its own expense, and the drafter of this standard was Wu Ningsun.
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