Influence of the surface quality of the hydraulic press on the performance of the equipment?

In general, the smaller the surface roughness value, the better its wear resistance. However, if the surface roughness value is too small, the lubricating oil can not play a role, which will make the adhesion between the contact surfaces simple, but increase the wear. Therefore, the roughness of the contact surface needs to have an optimal value, which has a certain connection with the operating condition of the part, when the load is large, the initial wear will increase, and the optimal value of the surface roughness will also increase.

(2) The influence of surface cold hardening on wear resistance

2, the impact on fatigue intensity

Under the action of alternating load, because the concave part of the surface will form a stress concentration, so that the surface of the fatigue crack. Therefore, the greater the surface roughness value of the hydraulic press is assumed, the deeper the surface marks will be, the smaller the radius of the bottom of the grain, and the talent of anti-fatigue damage will become very poor.

The remaining tensile stress of the surface layer will cause the surface to expand fatigue cracks and accelerate fatigue damage; The remaining compressive stress on the surface layer can be useful for relieving the fatigue stress and suppressing the onset of fatigue damage. The cold hardening of the surface will be accompanied by the onset of the remaining compressive stress, and preventing the onset of cracks can also be useful to prevent the expansion of existing cracks, which is beneficial to alleviate the fatigue strength.

The corrosion resistance of hydraulic press parts is closely related to the surface quality and surface roughness of the parts. The greater the surface roughness value, the more corrosive items will be in the depression of the surface, and its corrosion resistance will become worse. The remaining tensile stress of the surface layer will cause stress corrosion cracking and reduce the wear resistance of the part, while the remaining compressive stress can prevent stress corrosion cracking.

Four column hot pressing machine