This standard specifies the classification, basic performance and requirements, test methods, inspection rules and signs, packaging, storage and transportation of rubber elastic components for rolling stock. This standard is applicable to rubber elastic components used for suspension, buffering, flexible connection and limit of locomotive vehicle suspension system, equipment installation system, connection and limit position.
Scope of application:
This standard specifies the classification, basic performance and requirements, test methods, inspection rules and signs, packaging, storage and transportation of rubber elastic components for rolling stock.
This standard is applicable to rubber elastic components used for suspension, buffering, flexible connection and limit of locomotive vehicle suspension system, equipment installation system, connection and limit position.
This standard does not apply to air springs for rolling stock, sealing rubber products, coupler bumpers, hoses and conveyor belts.
Static performance test method:
1. Test environment
A. The room temperature test should be carried out in a room with a constant temperature of 23 ° C ± 2 ° C.
B. Special ambient temperature test should be carried out in an environmental chamber (such as high and low temperature environmental chambers). The temperature deviation inside the environmental chamber should be within 2 °C. The environmental chamber should have an automatic temperature adjustment device with an accuracy of 2 °C. .
C. Without constant temperature conditions, it can be carried out at room temperature of 5 ° C to 35 ° C, but after the temperature adjustment of the specified temperature, the test piece is taken out and the test is completed within 30 min.
2, environmental regulation
A. The rubber test piece should be environmentally adjusted before the normal temperature test. The standard temperature for adjustment is 23 °C and 12 °C, and the adjustment time of the rubber test piece is generally not less than 24 h.
B. The rubber test piece should be environmentally adjusted before the special ambient temperature test. The adjustment time should be no less than 12h in the environmental box of the specified temperature (such as high and low temperature environmental box). The temperature deviation inside the environmental box should be in the 2 Within °C.
C. During the adjustment of the test piece, the entire surface of the test piece should be exposed to the adjustment environment as much as possible, and the test piece should be protected from various external forces and direct sunlight. It is necessary to use a test piece that is squeezed and loaded, and the time of placing it after pressing the test tool is agreed by the commissioning party and the tester.
3. Time interval between test and vulcanization
A. All rubber test pieces performance test, the time interval between vulcanization and test is 24 h.
B. The time interval between product testing and vulcanization should not exceed 3 months.
C. Product performance comparison test should be carried out at similar time intervals.
4. General requirements for testing
A. The direction and method of loading, the test load or deformation range, the number of samples and the test temperature are determined by the client. The direction of loading should be selected in one direction. The vertical axis represents the loading load P, and the horizontal axis represents the rectangular coordinate system of the deformation S continuously records the PS relationship.
Note: When used for torsion or yaw test, the load and deformation marked parts are replaced by torque, torsion angle or yaw angle.
B. Adding or subtracting a load for about 1 min} 2 min, you can control the load and control the deformation. Load control should be used in the case of large load and small deformation, and deformation control should be used in case of large load and large deformation.
C. The pause time before the formal loading is not less than 3 minutes. In special cases, it is determined according to the recovery of the test piece.
D. When testing with the same test piece under various temperature conditions, it should be carried out from room temperature to high temperature and then from room temperature to low temperature.
5. Test equipment and equipment
A. The test equipment shall have the function of measuring and recording the load and deformation. The test load P shall be 20% of the range of the test equipment.
Within 100%, the load accuracy of the test equipment shall be within 1% of the indicated value, and the allowable error of the measured deformation shall be within 1% of the maximum deformation of the test piece.
B. The test equipment shall have the vertical, horizontal or torsional loading test channel required for the test. The loading test channel shall have the load and deformation control measurement function. The test shall determine the loading direction, the number of channels, the load or deformation control according to the bearing condition of the product. mode.
C. According to the structure and shape of the product, the loading method and the working conditions, the corresponding tooling should be configured. Tooling should ensure accurate measurement of static characteristics. The test clamping method of the sample or the physical object should simulate the actual installation state and use condition of the product as much as possible.
Article from: Jinan Zhongchuang Industrial Test System Co., Ltd. Technology Department
Http://news.chinawj.com.cn Editor: (Hardware Business Network Information Center) http://news.chinawj.com.cn
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