Crack Analysis of Automobile All-wheel Universal Joint Bearing
The automobile all-wheel universal joint bearing is an important safety part for the automobile transmission system and has a great influence on the comfort and stability of the vehicle. The bearing is made by precision forging and machining technology. The general surface of the bearing is a smooth silver-white metal surface with a variety of lines and small dots. The cracks of these parts are most likely to occur in the axial direction of the bearing. If the bearing is damaged, the vehicle will suffer from vibration, noise and power loss.
When the automobile universal joint bearing has been damaged by fatigue, surface cracks and slits will generally appear on the external surface. This kind of crack always starts from the radial direction and extends to the axial direction. It usually appears near the large and small circles of the bearing; and they may also start from the inner circle or the surface near the inner circle and then extend to the axial direction. Therefore, in order to prevent the damage of the bearing, it is essential to detect and analy the crack of the bearing in time.
When analyzing the cracks of the automobile universal joint bearing, firstly, the surface of the bearing is visually inspected to determine whether the cracks are in the axial direction. At the same time, a magnifying glass or a microscope can be used to observe the micro-cracks on the surface of the bearing, so as to infer the origin and development direction. After that, the size and morphology of the crack can be analyzed through a scanning electron microscope or a polarized light microscope.
In the analysis of the crack of the automobile universal joint bearing, it is also possible to take a sample of the crack and directly analyze it by X-ray diffraction or X-ray fluorescence. This method can quickly determine the composition and structure of the material and further analyze the content of harmful elements in it.
In addition, after the bearing is removed from the vehicle, it can be tested on an electronic universal testing machine. The bearing bending test can be used to analyze the size of the damage and the load carrying capacity of the bearing. The bearing fatigue test can be used to determine the extent of the damage to the bearing and assess its continual use ability.
Finally, it is important to note that for fatigue cracks, it is necessary to strike the bearing with a hammer to identify the sound. If the sound is clear and the bearing has no crack, then it can be judged that the bearing has no damage.
In conclusion, crack analysis of the automobile all-wheel universal joint bearing can help identify fatigue and other damages to the bearing. Through series of tests and observations, cracks in the axial direction can be detected and analyzed, thus reducing or eliminating the potential risks and hazards caused by the bearing damage.
