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Tire Fatigue Performance Test System

18/04/2016

Project

Fatigue breakdown is the primary failure method for car wheels and is directly related to passenger safety. The bending fatigue strength is an important parameter used to describe this condition. In this case sample, the microprocessor-controlled car wheel bending fatigue automatic test system is used to achieve real time monitoring, control, and display while maintaining the stability of the bending moment during the test process. The testing machine determines whether the wheel has passed the test by monitoring the changes to rotation numbers, and issues an alarm due to wheel fatigue before a breakdown occurs. Wheels are one of the most critical core components of a car and directly affect the safety and comfort level of the car. The process used to manufacture wheels includes casting, stamping, forming, welding, and anti-corrosion treatment. The requirements for each process are extremely stringent. From the perspective of actual operation, the force absorbent surfaces of a car’s wheels are extremely complex when the car is being driven. In addition to the support, lateral bending moment, and driving forces, as the wheels rotate and withstand friction, the temperature and pressure can also change at any time. Therefore, the fundamental issue of the wheel design and manufacturing process is to ensure that the fatigue lifespan can satisfy the application and performance requirements.

Requirements

Typically, wheel fatigue lifespan tests and inspections include two aspects: The wheel radial fatigue test, which primarily inspects the comprehensive strength of the entire wheel, and the wheel bending fatigue test, which examines the wheel spoke and weld strengths. At present, the domestic automobile industry mostly uses imported hydraulic servo fatigue testing machines to perform tests on finished tire products. However, despite their high test accuracy, these machines are bulky and expensive, the tires being tested are hard to install during the testing process, and they lack test speed efficiency. Therefore, it is absolutely necessary to produce a highly efficient, affordable, and easy to install platform that does not sacrifice the accuracy of the test results for the manufacturers.

  • Range of the primary wheel shaft rotation speed test: 40 to 400 rotations/minute.
  • Pressure load test range: 0 to 70 kN.
  • Highly efficient, anti-vibration computing platform.
  • Machine layout is reasonable, compact, and easy to maintain.


System Features

Because this testing system must be operated over long periods of time and the wheel being tested will continue to rotate while the pressurized tests are being performed during the wheel testing process, machine vibrations end up as one of the factors that must be overcome. Therefore, Advantech’s MIC-7500 , equipped with 6th generation Intel® Core™ i processor and innovatively modular design, is suited for such systems. This fanless industrial PC has an integrated design that can be compatible with different expansion modules. The compact structural design of this system can also resolve the bulky and inconvenient installation problems accompanying the traditional machines. The PCIE-1812 simultaneous sampling multifunction data acquisition board, with a 250 kS/s sampling rate, 16-bit high resolution AI channels and 32-bit counter/ timer/ encoder channels can fully satisfy the wheel rotation speed and pressurized force measurement requirements.