Surface pit texture subjected to edge profile modification and processing method thereof

Abstract

The invention relates to a surface pit texture subjected to edge profile modification and a processing method thereof. The number of pits in an effective contact area of the surface texture is no less than 3, the diameter of each pit is not smaller than 30 micrometers, the depth of each pit is not smaller than 10 micrometers, the area duty ratio is 5-30%, the edges of the pits can be in continuous curved surface change through edge profile modification, i.e., relatively gentle curved surfaces inside the pits and relatively gentle curved surfaces outside the pits are connected, and no sharp edges exist. The method comprises the steps of selecting a base material; manufacturing pits; performing edge profile modification and cleaning. The surface pit texture subjected to edge profile modification can lower the aggressivity of the surface of the texture on a dual and is suitable for various working conditions, such as point contact, linear contact, surface contact, dry friction and boundary lubrication, and under the lubrication state, while lubricating liquid storage, impurity collection and granulating function are realized, a lubricating film can be facilitated to be formed since the edges of the pits subjected to profile modification in the contact area are in wedge contact, so that frictional wear is reduced.

Description

technical field [0001] The invention relates to an edge-modified surface pit texture and a processing method thereof. Background technique [0002] Surface texture is a lattice of pits or tiny grooves with a certain size and arrangement processed on the surface of the material. This type of texture is considered to have the function of storing lubricating fluid, collecting impurities and abrasive particles. Practice has also proved that the surface Texture is an effective means to improve the tribological properties of materials. [0003] However, most of the existing surface textures are processed by laser etching and simple burr grinding. The intersection edge from the surface of the material to the inner surface of the texture is right-angled and sharp, and the edge effect is prominent under the load, that is, there is a problem of stress concentration. This will increase the abrasive wear effect, resulting in a substantial increase in the wear of the pair under boundary...

AI Technical Summary

Problems solved by technology

[0003] However, most of the existing surface textures are processed by laser etching and simple burr grinding. The intersection edge from the surface of the material to the inner surface of the texture is right-angled and sharp, and the edge effect is prominent under the load, that is, there is a problem of stress concentration. This will increase the abrasive wear effect, resulting in a substantial increase in the wear of the pair under boundary lubrication or dry friction conditions, resulting in a high coefficient of friction and unstable

Therefore, this type of surface texture is mainly used for surface contact and fluid lubrication conditions, and is not suitable for point contact, line contact, dry friction, and boundary lubrication conditions.

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