How does the surface quality of the oil press affect the performance of the equipment?
The information comes from:the Internet posted on:2023-08-29
Generally speaking, the smaller the surface roughness value, the better its wear resistance. However, assuming that the surface roughness value is too small and the lubricating oil cannot function, it will cause a brief adhesion between the contact surfaces and instead increase wear. Therefore, the roughness requirement on the contact surface has an optimal value, which is related to the working condition of the parts. When the load is large, the initial wear will also increase, and the optimal value of surface roughness will also increase.
(2) The Effect of Surface Cold Work Hardening on Wear Resistance
2. The impact on fatigue intensity
Under the action of alternating loads, the concave and valley areas on the surface will form stress concentration, causing fatigue cracks to occur on the surface. So, assuming the surface roughness value of the oil press is larger, the surface marks will be deeper, the bottom radius of the marks will be smaller, and the ability to resist fatigue damage will become very poor.
The remaining tensile stress on the surface layer will cause fatigue cracks to expand on the surface, accelerating fatigue damage; The remaining compressive stress on the surface layer can effectively alleviate fatigue stress and suppress the onset of fatigue damage. Surface cold hardening is accompanied by the onset of residual compressive stress, preventing the onset of cracks can also effectively block the expansion of existing cracks, which is beneficial for alleviating fatigue resistance.
The corrosion resistance of oil pressure machine parts is closely related to the surface quality and roughness of the parts. The larger the surface roughness value, the more corrosive substances will be present in the surface depressions, and their corrosion resistance will deteriorate. The remaining tensile stress on the surface layer can cause stress corrosion cracking, reducing the wear resistance of the parts, while the remaining compressive stress can prevent stress corrosion cracking.
