GB/T 5334-1995 Performance requirements and test methods for passenger car steel wheels

This standard specifies the fatigue test performance requirements and laboratory test methods for passenger car wheels. This standard applies to passenger car steel spoke wheels. GB/T 5334-1995 Passenger car steel wheel performance requirements and test methods GB/T5334-1995 Standard download decompression password: www.bzxz.net

National Standard of the People's Republic of China
Performanice requirements and test methodsof passenger car steel wheels
Performanice requirements and test methodsof passenger car steel wheels Subject content and scope of application
This standard specifies the fatigue test performance requirements and laboratory test methods for passenger car wheels. This standard applies to steel spoke-type wheels for passenger cars. 2 Test items
2.1 Dynamic bending fatigue test.
2.2 Dynamic radial fatigue test.
3 Test samples
GB/T5334—1995
Replaces GB5334—85
The test sample should be a brand new wheel that has undergone a complete processing process and is ready for installation on a vehicle. Each wheel can only be tested once. 4 Dynamic bending fatigue test (90° loading method) 4.1 Test equipment
The test bench should have a driven rotating device, the wheel can rotate under the action of a fixed bending moment, or the wheel is fixed and subjected to a rotating bending moment (see Figures 1 and 2). Approved by the State Administration of Technical Supervision on September 12, 1995, 92
Implemented on March 1, 1996
GB/T 5334—1995
Figure 1 Bending fatigue test
1—Test load; 2—Arm, 3—Rim centerline, 4—DiameterFigure 2 Bending fatigue test
1—Test load; 2—Arm; 3—Rim centerline; 4—Diameter4.2 Test procedure
4.2.1 Preparation
GB/T5334—1995
After adjusting the wheel position, the wheel rim should be firmly clamped to the test fixture. The connection surface of the test fixture should be the same as the mounting features of the hub surface on the vehicle. The arm length is 0.5~~1.04m. The loading arm and the connecting parts are connected to the mounting plane of the wheel with studs and nuts (or bolts). The installation conditions should be equivalent to the actual use conditions of the vehicle. At the beginning of the test, tighten the wheel nuts (or bolts) to the torque value specified by the automobile manufacturer. Lubrication of the bolts and nuts is not allowed.
The wheel bolts and nuts can be tightened again during the test. The loading system should maintain the specified load with an error not exceeding ±2.5%. 4.2.2 Bending moment
In order to apply a bending moment to the wheel, a force parallel to the wheel mounting surface is applied at a specified distance (arm). 4.2.3 Determination of bending moment
The bending moment M (force × arm) is expressed in N·m and is determined by formula (1): M-(μR+d)F:S
Where: R is the static load radius. The maximum static load radius of the tire for the wheel specified by the wheel or automobile manufacturer, m; the set friction coefficient between the tire and the road; μ-
d—the inner offset or outer offset of the wheel (the inner offset is a positive value, the outer offset is a negative value), m; F—the maximum vertical static load on the wheel specified by the wheel or automobile manufacturer or the rated load of the wheel, N; S strengthening test factor.
Note: For the values ​​of μ and S, see Table A1 in Appendix A (Supplement). 4.3 Dynamic bending fatigue test performance requirements
The minimum number of cycles is 18×103 times.
4.4 Failure judgment basiswwW.bzxz.Net
a. The wheel cannot continue to bear the load;
b. The original crack has expanded or a visible crack that invades the wheel section caused by stress has appeared. 5 Dynamic radial fatigue test
5.1 Test equipment
The test bench has a drum with a smooth surface wider than the section of the loaded tire. The connection surface of the test device should be the same as the assembly characteristics of the wheel hub on the vehicle. When the wheel rotates, the test bench can apply a fixed load to the wheel, and the loading direction is perpendicular to the drum surface. And the radial direction is consistent with the center line of the wheel and the drum, and the drum axis and the wheel axis should be parallel. The recommended minimum drum diameter is 1 700 mm.
5.2 Test procedure
5.2.1 The tire selected for the test wheel should meet the rated load of the wheel or the tire with the maximum load capacity specified by the wheel manufacturer or the automobile manufacturer.
The tire pressure during the test is determined according to the operating pressure of the maximum tire that can be equipped with the wheel specified by the wheel manufacturer or the automobile manufacturer. The recommended tire pressure during the test is shown in the following table: Operating pressure
161~280
281~450
The air pressure may increase during the test, but no adjustment is required. 94
Test pressure
GB/T 5334—1995
The loading system shall maintain the specified load with an error not exceeding ±2.5%. 5.2.2 Determination of radial load
The radial load F, measured in N, is determined by formula (2): F
Where: F
The maximum vertical static load on the wheel specified by the wheel or automobile manufacturer or the rated load of the wheel, in N; - strengthening test factor.
Note: For the value of K, see Table A2 in Appendix A.
5.3 Dynamic radial fatigue test performance requirements
The minimum number of cycles is 500×10°.
5.4 Failure judgment basis
The wheel cannot continue to bear the load;
The original crack has expanded or a visible crack that invades the wheel section caused by stress has appeared. +（2）
GB/T5334—1995
Appendix A
Test coefficients
(Supplement)
In order to uniformly apply the specified test methods, the coefficients in Table A1 and Table A2 should be used when conducting the test. Table A1 Dynamic bending fatigue test coefficients (see 4.2.3) Test items
Dynamic bending fatigue test
Test items
Dynamic radial fatigue test
Additional instructions:
Strengthening test coefficients
Table A2 Dynamic radial fatigue test coefficients (see 5.2.2)Strengthening test coefficients
This standard was proposed by China National Automotive Industry Corporation. It is under the jurisdiction of the National Automobile Standardization Committee. This standard was drafted by the Wheel Factory of the First Automobile Works. The main drafter of this standard is Li Weijiu.
Friction coefficient
≥6 000
From the date of publication of this standard, the standard JB4000--85 "Performance requirements for passenger car wheels" issued by the former Ministry of Machinery Industry of the People's Republic of China shall be invalid.
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