阅读说明：本技术 带倾角的表面微凹织构 (Surface micro-concave texture with dip angle ) 是由 李永健 祁志浩 闫剑锋 李德才 索双富 王子羲 晋立丛 黄伟峰 郭飞 路益嘉 于 2020-11-04 设计创作，主要内容包括：本发明公开了一种带倾角的表面微凹织构,所述表面微凹织构为I型织构、II型织构或III型织构,其中,所述I型织构中的单个织构的所述壁面夹角分别为相对两侧的钝角和锐角,所述I型织构中的所有单个织构的钝角位于相同的一侧,所述I型织构中的所有单个织构的锐角位于相同的另一侧；所述II型织构中的单个织构的所述壁面夹角全为钝角；所述III型织构中的单个织构的所述壁面夹角全为锐角。本发明的带倾角的表面微凹织构能减小犁削作用或减小润滑油的流失。(The invention discloses a surface micro-concave texture with an inclination angle, which is an I-type texture, a II-type texture or a III-type texture, wherein included angles of wall surfaces of single textures in the I-type texture are respectively an obtuse angle and an acute angle at two opposite sides, the obtuse angles of all the single textures in the I-type texture are positioned at the same side, and the acute angles of all the single textures in the I-type texture are positioned at the same other side; all the included angles of the wall surfaces of the single texture in the II-type texture are obtuse angles; the included angles of the wall surfaces of the single texture in the III-type texture are all acute angles. The micro-concave texture of the surface with the inclination angle can reduce the plowing effect or reduce the loss of lubricating oil.)

1. The surface micro-concave texture with the inclination angle is characterized in that the surface micro-concave texture is formed on the surface of a material, the surface of the material is used for facing and grinding a processed surface, and an included angle between the inner wall of a single texture in the surface micro-concave texture and the surface of the material is a wall surface included angle; the surface micro-concave texture is I type texture, II type texture or III type texture, wherein,

the included angles of the wall surfaces of the single texture in the I-shaped texture are respectively an obtuse angle and an acute angle which are opposite to each other, the obtuse angles of all the single textures in the I-shaped texture are positioned on the same side, and the acute angles of all the single textures in the I-shaped texture are positioned on the same other side;

all the included angles of the wall surfaces of the single texture in the II-type texture are obtuse angles;

the included angles of the wall surfaces of the single texture in the III-type texture are all acute angles.

2. The angular surface dimple texture of claim 1, wherein the surface dimple texture has an areal density of 5% to 50%.

3. The angular surface dimple texture of claim 1, wherein the individual texture of the surface dimple texture is in the shape of a pit or a groove.

4. The angular surface micro-concave texture of claim 1, wherein the obtuse angle of the single texture of the type I texture ranges from 100 ° to 170 °, and the acute angle of the single texture of the type I texture ranges from 10 ° to 80 °; the obtuse angle of a single texture in the II texture ranges from 100 degrees to 170 degrees; the acute angle of a single texture in the III texture ranges from 10 degrees to 80 degrees.

5. The angular surface dimple texture of claim 1, wherein the dimensions of the individual textures of the surface dimple texture are in the micrometer scale, and the spacing between every two adjacent individual textures of the surface dimple texture is in the micrometer scale or the millimeter scale.

6. The angular surface dimple texture of any of claims 1 to 5, wherein the surface dimple texture is obtained by tilting a processing platform and processing the surface of a material to be processed using a millisecond laser.

7. The surface micro-concave texture with the inclination angle of claim 6 is characterized in that the I-type texture is obtained by the following steps:

polishing, ultrasonically cleaning and drying the surface of a material to be processed;

determining the shape and size of a single texture of the I-shaped texture, a wall surface included angle and an array mode, and processing by utilizing millisecond laser through the inclined processing platform to obtain the I-shaped texture;

and step three, polishing, ultrasonic cleaning and drying the surface of the processed material.

Technical Field

The invention relates to the technical field of surfaces of mechanical motion friction pairs, in particular to a surface micro-concave texture with an inclination angle.

Background

The shape of the solid surface greatly affects the friction behavior and the wear resistance, the friction characteristic of the solid surface can be improved by selecting proper surface treatment instead of simply smoothing the solid surface, and the micro-concave texture of the processed surface is one of the surface treatment modes.

A surface dimpled texture is an array of pits, grooves, or other shapes on the order of microns in size and spacing machined on the surface of a material by some machining method. The surface micro-concave texture has a remarkable effect on improving the surface friction wear and the lubricating performance of the friction pair, and is a hot point of tribology research in recent years.

Research shows that in dry friction, a large number of abrasive particles are generated in the repeated opposite grinding process of a surface, the size of the abrasive particles is generally in the micron scale, and the surface micro-concave texture can accommodate the abrasive particles generated in the opposite grinding process, so that the abrasive particles are prevented from abrading the surface, therefore, the surface micro-concave texture can reduce the abrasion amount of the textured surface, but for the non-textured surface, because the opposite grinding surface has the texture, the inner wall and the surface of the texture can form a part similar to a cutting edge, the non-textured surface can be plowed, so that the abrasion of the non-textured surface is accelerated.

In the poor oil lubrication (including boundary lubrication and mixed lubrication), the distance between two friction surfaces is small, a contact area and a non-contact area exist between the two surfaces, lubricating oil exists in the non-contact area, which has great influence on reducing the friction coefficient and the abrasion loss in the friction process, and the micro-concave texture of the surface can reduce the actual contact area between the two surfaces, play a role in storing the lubricating oil, reduce the loss of the lubricating oil, and continuously provide the lubricating oil for the friction surfaces in the friction process, thereby reducing the friction and the abrasion of materials.

When in a fluid lubrication state, the two surfaces are completely separated by a lubricating oil film, the surfaces of the friction pair are not in direct contact, and the friction force and the abrasion are very small, so that the lubricating oil is an ideal lubrication state. The cavitation phenomenon of the negative pressure region formed by the surface texture in this state suppresses the negative pressure, thereby generating additional bearing capacity and enabling more rapid formation of a hydrodynamic lubricating oil film.

The friction performance is affected differently by different shapes, sizes, combinations and the like of the surface micro-concave texture.

In summary, the conventional surface micro-concave weaving has the following problems: due to the plowing action of the inner wall of the micro-concave texture, when the non-textured surface material is pressed into the texture under the action of a load, the surface material is more prone to peeling off, and abrasion is aggravated. When the vibration is large in the friction process or the surface of the counter-friction pair is not on the horizontal plane, the lubricating oil is more easily lost during oil lubrication.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. It is therefore an object of the present invention to provide a slightly concave angled surface texture that reduces the plowing action or reduces the loss of lubricant.

According to the surface micro-concave texture with the inclination angle, the surface micro-concave texture is formed on the surface of a material, the surface of the material is used for facing and grinding a processed surface, and an included angle between the inner wall of a single texture in the surface micro-concave texture and the surface of the material is a wall surface included angle; the surface micro-concave texture is I type texture, II type texture or III type texture, wherein,

the included angles of the wall surfaces of the single texture in the I-shaped texture are respectively an obtuse angle and an acute angle which are opposite to each other, the obtuse angles of all the single textures in the I-shaped texture are positioned on the same side, and the acute angles of all the single textures in the I-shaped texture are positioned on the same other side;

all the included angles of the wall surfaces of the single texture in the II-type texture are obtuse angles;

the included angles of the wall surfaces of the single texture in the III-type texture are all acute angles.

According to the surface micro-concave texture with the inclination angle, when the surface micro-concave texture is an I-shaped texture, and when the opposite grinding surface moves along the acute angle side and the obtuse angle side relative to the material surface with the I-shaped texture, compared with the texture with the wall included angle of 90 degrees in the prior art (namely the situation that the inner wall of a single texture in the prior art is completely vertical to the material surface), the texture with the inclination angle is beneficial to reducing the plough cutting action of the inner wall of the surface texture on the processed surface, so that the situation that the abrasion aggravation of the processed surface is caused by the surface micro-concave texture 1 is reduced, the service life of the processed surface can be prolonged, and the cost is reduced; in addition, the reasonable arrangement of the direction of the I-type micro-concave texture can improve the oil storage capacity of the surface. When the surface micro-concave texture is a type II texture, when the processed surface is ground to the surface of the material with the type II texture from any direction, the I texture can reduce the plowing effect of the inner wall compared with the texture of the prior art in which the included angle of the wall surface is 90 degrees (namely the condition that the inner wall of a single texture in the texture of the prior art is totally vertical to the surface of the material). When the surface micro-concave texture is a III type texture, the surface oil storage capacity of the material with the III type texture is increased, the loss of lubricating oil can be reduced, and the requirements on the space position and the motion direction of the friction surface are not required.

According to one embodiment of the invention, the surface density of the surface micro-concave texture is 5% to 50%.

According to one embodiment of the invention, the shape of the individual texture of the surface micro-concave texture is a pit or a groove.

According to one embodiment of the invention, the obtuse angle of the single texture of the I-shaped texture ranges from 100 degrees to 170 degrees, and the acute angle of the single texture of the I-shaped texture ranges from 10 degrees to 80 degrees; the obtuse angle of a single texture in the II texture ranges from 100 degrees to 170 degrees; the acute angle of a single texture in the III texture ranges from 10 degrees to 80 degrees.

According to one embodiment of the invention, the dimensions of the individual textures of the surface micro-concave texture are in the micrometer scale, and the spacing between every two adjacent individual textures of the surface micro-concave texture is in the micrometer scale or millimeter scale.

According to some embodiments of the invention, the surface dimple texture is obtained by tilting the processing platform and processing the surface of the material to be processed with a millisecond laser.

According to a further embodiment of the present invention, the I-type texture is obtained by the following steps:

polishing, ultrasonically cleaning and drying the surface of a material to be processed;

determining the shape and size of a single texture of the I-shaped texture, a wall surface included angle and an array mode, and processing by utilizing millisecond laser through the inclined processing platform to obtain the I-shaped texture;

and step three, polishing, ultrasonic cleaning and drying the surface of the processed material.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic perspective view of an I-shaped texture formed on a surface of a material according to an embodiment of the invention.

Fig. 2 is a schematic cross-sectional view taken at a in fig. 1.

Fig. 3 is a schematic perspective view of another I-type texture formed on the surface of a material according to an embodiment of the present invention.

Fig. 4 is a schematic perspective view of another I-shaped texture formed on the surface of a material according to an embodiment of the invention.

Fig. 5 is a schematic perspective view of a type II texture formed on a surface of a material according to an embodiment of the present invention.

Fig. 6 is a schematic cross-sectional view at B in fig. 5.

Fig. 7 is a schematic perspective view of a type III texture formed on a surface of a material according to an embodiment of the present invention.

Fig. 8 is a schematic cross-sectional view at C in fig. 7.

Reference numerals:

surface dimpled texture 1 Single texture 11

Material surface 2

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

The following describes the surface dimpled texture 1 with an inclination angle of an embodiment of the present invention with reference to fig. 1-8.

As shown in fig. 1-8, according to an embodiment of the invention, a surface micro-concave texture 1 with an inclination angle is formed on a material surface 2, the material surface 2 is used for facing and grinding with a processed surface to form a friction pair surface, and an included angle between an inner wall of a single texture 11 in the surface micro-concave texture 1 and the material surface 2 is a wall surface included angle; the surface micro-concave texture 1 is I-type texture (shown in figures 1-4), II-type texture (shown in figures 5-6) or III-type texture (shown in figures 7-8); the included angles of the walls of the single texture 11 in the I-shaped texture are respectively an obtuse angle (for example, refer to an angle α in fig. 2) and an acute angle (refer to an angle β in fig. 2) at opposite sides, the obtuse angles of all the single textures 11 in the I-shaped texture are located at the same side, and the acute angles of all the single textures 11 in the I-shaped texture are located at the same other side; the included angles of the wall surfaces of the single texture 11 in the II-type texture are all obtuse angles; the included angles of the wall surfaces of the single texture 11 in the III-type texture are all acute angles.

According to the surface micro-concave texture 1 with the inclination angle, when the surface micro-concave texture 1 is an I-shaped texture, and when a ground surface moves along an acute angle side and an obtuse angle side relative to a material surface 2 with the I-shaped texture, compared with a texture with a wall included angle of 90 degrees in the prior art (namely the situation that the inner wall of a single texture in the prior art is completely vertical to the material surface), the texture is beneficial to reducing the plough action of the inner wall of the surface texture on the processed surface, so that the situation that the wear aggravation of the processed surface is caused by the surface micro-concave texture 1 is reduced, the service life of the processed surface can be prolonged, and the cost is reduced; in addition, the reasonable arrangement of the direction of the I-type micro-concave texture can improve the oil storage capacity of the surface. When the surface micro-concave texture 1 is a type II texture, when the processed surface is opposite-ground to the surface 2 of the material with the type II texture from any direction, the type II texture can reduce the plowing effect of the inner wall compared with the texture with the included angle of the wall surface of 90 degrees in the prior art (namely, the condition that the inner wall of a single texture in the prior art is totally vertical to the surface of the material). When the surface micro-concave texture 1 is a III-type texture, the oil storage capacity of the material surface 2 with the III-type texture is increased, the loss of lubricating oil can be reduced, and the requirements on the space position and the motion direction of the friction surface are not required.

According to one embodiment of the present invention, the surface micro-concave texture 1 has an areal density of 5% to 50%. Thereby, excellent surface friction performance can be ensured.

According to an embodiment of the present invention, the shape of the single texture 11 of the surface micro-concave texture 1 is any shape such as a pit or a groove, and can be selected according to actual requirements.

According to one embodiment of the invention, the obtuse angle of the single texture 11 of the I-shaped texture ranges from 100 degrees to 170 degrees, and the acute angle of the single texture 11 of the I-shaped texture ranges from 10 degrees to 80 degrees, so that the plowing effect of the inner wall of the surface texture on the processed surface can be reduced, and the processing is convenient. In addition, the reasonable arrangement of the direction of the I-type micro-concave texture can improve the oil storage capacity of the surface. The obtuse angle of the single texture 11 in the texture II ranges from 100 degrees to 170 degrees, so that the plowing effect of the inner wall of the surface texture on the processed surface can be reduced, and the processing is facilitated. The acute angle range of the single texture 11 in the III texture is 10-80 degrees, so that the oil storage capacity of the material surface 2 with the III texture can be increased, the loss of lubricating oil can be reduced, the requirements on the space position and the motion direction of a friction surface are avoided, and the processing is convenient.

According to one embodiment of the present invention, the dimensions of the individual textures 11 of the surface micro-concave texture 1 are in the micrometer scale, and the spacing between every two adjacent individual textures 11 of the surface micro-concave texture 1 is in the micrometer scale or in the millimeter scale. Thus, the friction surface has good friction properties (e.g., low coefficient of friction, low friction) and low material wear.

According to some embodiments of the invention, the surface micro-concave texture 1 is obtained by tilting the processing platform and processing the surface 2 of the material to be processed with a millisecond laser. Therefore, the surface micro-concave texture 1 can be accurately processed, and the design requirement of the surface micro-concave texture 1 is met.

According to a further embodiment of the present invention, the I-type texture is obtained by the following steps:

step one, polishing, ultrasonic cleaning and drying the surface 2 of the material to be processed, so that the surface of the material to be processed can be smooth.

And step two, determining the shape and size, wall surface included angle and array mode of the single texture 11 of the I-shaped texture, and processing by utilizing millisecond laser through an inclined processing platform to obtain the I-shaped texture. Because the inclined processing platform has an inclination angle and the laser focal length is unchanged, the processing of the I-shaped texture needs to be carried out step by step, the texture at the same height or in the same height range is simultaneously processed, and then the laser emission position is changed to carry out the processing step by step.

And step three, polishing, ultrasonic cleaning and drying the surface of the processed material. Thereby, the material surface 1 finally formed with the I-type texture can be made flat.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like are intended to mean that a particular feature, structure, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.