JB/T 50106-1998 Reliability test specification for leaf springs of four-wheeled agricultural transport vehicles

JB/T 50106-1998 This standard specifies the test items, test methods and evaluation indicators for the reliability of leaf springs for four-wheeled agricultural transport vehicles. This standard is applicable to the reliability assessment of leaf springs for four-wheeled agricultural transport vehicles. JB/T 50106-1998 Reliability Assessment Test Specification for Leaf Springs for Four-wheeled Agricultural Transport Vehicles JB/T50106-1998 Standard Download Decompression Password: www.bzxz.net

ICS 65. 060. 10
Machinery Industry Standard of the People's Republic of China
JB/T50106—1998
Four-wheel Agricultural Transport Vehicle Leaf Spring
Reliability Assessment Test Specification
(Internal Use)
Published on March 19, 1998
Ministry of Machinery Industry of the People's Republic of China
Implemented on July 1, 1998
JB/'F 510— 19
This standard is proposed and managed by the National Technical Committee for Standardization of Tractors: The responsible drafting unit of this standard is the Machinery Industry Bureau Yang Tractor Research Institute. The main drafters of this standard are Jin Yuping and Yi Bin. ·Scope
Standards of the Machinery Industry of the People's Republic of China
Reliability Test Specifications of Steel Plates for Four-wheeled Agricultural Transport Vehicles
(Internal Use)
JB/T50106-1998
This standard specifies the test items, test methods and evaluation indicators for the reliability test of steel plates for four-wheeled agricultural transport vehicles. This standard is applicable to the reliability test of steel plates for four-wheeled agricultural transport vehicles. 2 Inspection Items
The test items for the reliability test of steel plates are the vertical load test of steel plates. 3 Test Products
Randomly select 5 items from the minimum 10 qualified products of the inspection unit. 4 Test method
4.1 Test equipment
Decompression furnace test machine or other corresponding test machine, the test error shall not exceed ±1%, 4.2 Test piece installation
The test piece shall be supported in the actual installation state on the vehicle or in a state similar in function, and the middle part shall also be installed in the actual installation state on the vehicle or in a state similar in function. The ear of the spring shall be supported on the wheel with auxiliary support, 4.3 The deformation of the weak load
should be measured, the plate belt shall be lifted and adjusted continuously, then unloaded and then continuously, and the deformation of the spring shall be calculated. Measure five times in this way and calculate the arithmetic mean value F of the full load deformation equivalent to the vehicle state. 4.4 Test load Www.bzxZ.net
The test load is a sinusoidal alternating load, and the deformation of the bullet is used to represent the test load of the bullet. The deformation mean value F and the deformation amplitude are calculated by the following formula:
F, 0.4(F)+8VF,)
The deformation of the test spring F=F+F.
Wherein; The static deformation of the spring at full load equivalent to the clamping state on the vehicle cm9-the coefficient of the type of spring, before the value, is 2.5; after the value, take 2.0. 4.5 Loading and inspection during the test
4.5.1 When the test reaches 1.U×10, 3.0×1*, 6.0×10*, adjust the torque of the variable bolt and make the deformation average to the specified value. Approved by the Ministry of Machinery Industry on March 19, 2003
Implemented on July 1, 2008
Record the adjustment amount of the current added load.
JB/T50106199A
4.5.2 In the test, the sample is inspected every 1.0×10° grinding, and every 05×101 inspection after the crack is found. 4.5.3 The test rate should be controlled so that the sample surface temperature does not exceed 150°C. 4.5.4 The number of failures when any one of the test samples first shows a macro crack (the same part of the test surface along the thickness direction) is taken as the life of the sample.
4, According to the treatment
The fatigue test life of the steel plate is logarithmically normal distributed, and its unique life under the cycle table is evaluated. 5 Evaluation index
The life under 90% survival is 28.010* times.
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