GB/T 5909-1995 Performance requirements and test methods for truck wheels

This standard specifies the fatigue test performance requirements and laboratory test methods for truck wheels. This standard applies to truck steel spoke wheels, and other vehicle wheels can refer to it (except for passenger car wheels). GB/T 5909-1995 Truck wheel performance requirements and test methods GB/T5909-1995 Standard download decompression password: www.bzxz.net

National Standard of the People's Republic of China
Performance requirements and test methods of truck wheels
Subject content and scope of application
This standard specifies the fatigue test performance requirements and laboratory test methods for truck wheels. GB/T5909--1995
Replaces GB5909-86
This standard applies to steel spoke wheels for trucks, and wheels of other vehicles may refer to it (except for car wheels). 2 Test items
2.1 Dynamic bending fatigue test.
2.2 Dynamic radial fatigue test.
3 Test samples
The test samples should be new wheels that can be used on vehicles and have undergone a complete processing process. Each new wheel can only be used for one test. 4 Dynamic bending fatigue test (90° loading method) 4.1 Test equipment
The test bench should have a driven rotating device. The wheel rotates under a fixed bending moment or the wheel is stationary and subjected to a rotating bending moment (see Figure 1 and Figure 2). Figure 1 Bending fatigue test
1 Test load; 2--arm; 3--rim centerline; 4--diameter Approved by the State Administration of Technical Supervision on September 12, 1995 and implemented on March 1, 1996
4.2 Test procedure
GB/T 5909-1995
Figure 2 Bending fatigue test
1--test load; 2-arm; 3--wheel centerline + 4--diameter 4.2.1 Preparation
Adjust the wheel rim position and clamp the rim firmly to the test fixture. There is a test connector similar to the hub mounting surface on the vehicle, which has a rigid load-bearing arm shaft and is assembled to the test wheel mounting surface with studs and nuts used for the specified wheel. The installation should be equivalent to that on the vehicle. At the beginning of the test, the wheel should be assembled and tightened according to the regulations of the automobile manufacturer. Excess paint deposits, dust or impurities should be removed from the mating surfaces of the test connector and the wheel. When there is no load, the eccentricity of the final clamping position of the wheel should not exceed 0.30 mm.
Lubrication of stud bolts and nuts is not allowed. Wheel bolts or nuts can be tightened again during the test; the loading system should maintain the specified load with an error of no more than ±5%.
4.2.2 Determination of test load and bending moment:
Bending moment (M)
Test load is from
(see Figures 1 and 2)
Bending moment M (force × lever arm) is expressed in N·m and determined by the following formula: M=(μR+d)F·S
Wherein, Mwww.bzxz.net
Bending moment, N·m;
Set friction coefficient between tire and road; -static load radius, which is the static radius under the maximum tire load for the wheel specified by the wheel or automobile manufacturer, m; -inner offset or outer offset of the wheel (inner offset is a positive value, outer offset is a negative value. For example, if the wheel can be used as an inner offset wheel or an outer offset wheel, the inner offset is used), m; -maximum vertical static load on the wheel or rated load of the wheel specified by the wheel or automobile manufacturer, N; F
Strengthening test coefficient.
Note: For μ and S values, see Table 1.
GB/T 5909—1995
4.3 For the test load factor and the minimum number of cycles, see Table 1. Table 1 Bending fatigue test (90° loading method) Load factor and minimum number of cycles Material
Steel wheel
4.4 Failure index
Nominal rim diameter
Code, in
Any diameter
The wheel cannot continue to bear the load;
Inner offset <100
and all outer offsets
Inner offset <100
and all outer offsets
Inner offset ≥100
Visible fatigue cracks that penetrate into the wheel section appear. b.
5·Dynamic radial fatigue test
5.1 Test equipment
Friction coefficient
Reinforcement coefficient
Minimum number of cycles
3×104
6×104
The test bench shall have a drum with a smooth surface wider than the cross-sectional width of the tire to be loaded. The recommended minimum drum diameter is 1700 mm. The loading direction of the test wheel shall be perpendicular to the drum surface and radially in line with the center of the test wheel and the drum. The axis of the drum shall be parallel to the axis of the test wheel. 5.2 Test procedure
5.2.1 The tire selected for the test wheel shall be a tire that matches the maximum load capacity specified by the wheel manufacturer or the automobile manufacturer. For spoke-type wheels, the test connector shall be equivalent to the hub mounted on the wheel and assembled with the bolts and nuts specified for the wheel. The wheel nuts are tightened to the torque limit value specified by the wheel factory or the automobile manufacturer according to the size and type of the bolts and nuts used. During the test, the nut torque should be checked and adjusted periodically to compensate for the wear of the nut and bolt hole mating surface. The bolts and nuts are not allowed to be lubricated.
The test load and tire inflation pressure are determined according to the wheel. The recommended tire pressure during the test is shown in Table 2. Table 2 Test tire pressure
Inflation pressure under use load
320~450
460~580
590~720
730~830
Note: The error of the selected test inflation pressure in the cold state shall not exceed ±5%. 5.2.2 Determination of radial load
The radial load F, measured in Newton (N), is determined by the following formula: FF·K
Where: Ff—radial load, N;
tire test inflation pressure
F—the maximum vertical static load on the wheel or the rated load of the wheel specified by the wheel or automobile manufacturer, N; K—strengthening test coefficient.
GB/T5909—1995
5.3The test load coefficient and the minimum number of cycles are shown in Table 3. Table 3 Load factor and minimum number of cycles for radial fatigue test Material
Steel wheel
5.4 Failure index
Rim nominal diameter code, in
12,13,14.15,16
16. 5,17.5,(15° DC)
15,16(SDC)
15,17,18.20,
19.5,22.5.
(15° DC)
18(DT)
The wheel cannot continue to bear the load or maintain air pressure; visible fatigue cracks that penetrate into the wheel section appear. b.
Additional remarks:
Strengthening factor
This standard was proposed by China National Automotive Industry Corporation and is under the jurisdiction of the National Technical Committee for Automobile Standardization. This standard was drafted by the Wheel Factory of Dongfeng Motor Corporation. The main drafter of this standard is Wang Wenxue.
Minimum number of cycles
5×105
7×105
10×105
5×105
7×105
10×105
5×105
From the date of publication of this standard, the standard JB4118-85 “Performance Requirements for Truck Wheels” issued by the former Ministry of Machinery Industry of the People’s Republic of China shall be invalidated.
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