Wear-resistant aluminum bushing structure

Abstract

The utility model discloses abrasion -resistant aluminium bush structure belongs to aluminium bush technical field, including the bush body made of aluminium alloy, the inner wall and the outer wall of bush body all are equipped with wear -resistant layer and lubrication structure, wear -resistant layer is the alumina ceramic layer that generates through hard anodic oxidation treatment at its inner surface, the lubrication structure is processed in wear -resistant layer surface, through the setting of wear -resistant layer and lubrication structure, the alumina ceramic layer provides high hardness and wear resistance, and lubrication structure guarantees the formation of continuous oil film, reduces the friction coefficient, and the dimple texture can store lubricating medium, and the micro -pit can be used as micro -type oil depot, provides lubrication under the starting or boundary lubrication condition, reduces dry friction, and the tiny particle that wear produces can fall into the dimple, reduces the secondary scratch to the friction surface.

Description

Technical Field

[0001] This utility model belongs to the field of aluminum bushing technology, specifically relating to a wear-resistant aluminum bushing structure. Background Technology

[0002] Bushings, as a common basic mechanical component, are widely used in rotating or reciprocating motion mechanisms in the automotive, construction machinery, and aerospace industries. Their main function is to support shafts and reduce friction and wear. Aluminum alloy bushings are favored in applications requiring lightweight construction due to their low density, light weight, and good thermal conductivity.

[0003] Currently, traditional aluminum alloy bushings mainly suffer from the following technical limitations: Conventional aluminum alloy materials (such as 6061 and 2024) have relatively low hardness, and even after heat treatment (such as T6 condition), their wear resistance is still far lower than that of bronze or steel bushings. Under harsh operating conditions such as high speed, heavy load, or poor lubrication, their inner walls are prone to adhesive wear, abrasive wear, or fatigue spalling, leading to a significant shortening of service life. They are also highly dependent on lubrication: the operating performance of such bushings is highly dependent on continuous and sufficient oil film lubrication. Once the oil supply is interrupted or boundary lubrication occurs, the coefficient of friction will increase sharply, easily leading to serious failures such as seizing and bearing failure. Utility Model Content

[0004] The purpose of this invention is to provide a wear-resistant aluminum bushing structure to solve the problems mentioned in the background art. To achieve the above objective, this invention provides the following technical solution: a bushing body made of aluminum alloy, wherein both the inner and outer walls of the bushing body are provided with a wear-resistant layer and a lubrication structure, the wear-resistant layer is an alumina ceramic layer formed on its inner surface by hard anodizing, and the lubrication structure is machined onto the surface of the wear-resistant layer.

[0005] It should be noted in the solution that the lubrication structure includes an oil groove disposed on the surface of the wear-resistant layer, wherein the oil groove is one of a spiral oil groove, a herringbone oil groove, or a diamond-shaped oil groove, and the lubrication structure also includes a pit texture disposed on the surface of the wear-resistant layer.

[0006] It should be noted in the solution that the bushing body is made of high-silicon aluminum alloy.

[0007] It should be noted in the solution that the bushing body is a bimetallic composite structure, including a steel backing layer as a supporting substrate and an aluminum-based wear-resistant alloy layer sintered or cast on the inner surface of the steel backing layer.

[0008] It should be noted in the solution that the end of the bushing body is provided with a flared chamfer to facilitate insertion.

[0009] Compared with the prior art, the wear-resistant aluminum bushing structure provided by this utility model has at least the following beneficial effects:

[0010] (1) Through the setting of wear-resistant layer and lubrication structure, the alumina ceramic layer provides high hardness and wear resistance, the lubrication structure ensures continuous oil film formation, reduces the coefficient of friction, and the pit texture can store lubricating medium.

[0011] (2) By setting the lubrication structure, the micro-pits can act as micro oil reservoirs to provide lubrication under start-up or boundary lubrication conditions, reduce dry friction, and the tiny particles generated by wear can fall into the pits, reducing secondary scratches on the friction surface. Attached Figure Description

[0012] Figure 1 This is a three-dimensional structural diagram of the product of this utility model;

[0013] Figure 2 This is a cross-sectional structural diagram of the product of this utility model;

[0014] Figure 3 This is a side view structural diagram of the product of this utility model.

[0015] In the diagram: 1. Bushing body; 4. Steel backing layer; 5. Wear-resistant layer; 6. Oil groove; 7. Pits and textures. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Please see Figure 1-3 The wear-resistant aluminum bushing structure includes a bushing body 1 made of aluminum alloy. Both the inner and outer walls of the bushing body 1 are provided with a wear-resistant layer 5 and a lubrication structure. The wear-resistant layer 5 is an alumina ceramic layer formed on its inner surface by hard anodizing. The lubrication structure is machined on the surface of the wear-resistant layer 5. The lubrication structure includes an oil groove 6 provided on the surface of the wear-resistant layer 5. The oil groove 6 is one of a spiral oil groove, a herringbone oil groove, or a diamond-shaped oil groove. The lubrication structure also includes a pit texture 7 provided on the surface of the wear-resistant layer 5.

[0018] Through the setting of wear-resistant layer 5 and lubrication structure, wear-resistant layer treatment (hard anodizing) is carried out on the inner and outer walls of the bushing body: pretreatment: degreasing, alkaline washing, and acid washing to remove surface impurities, followed by electrolytic polishing to optimize surface smoothness; anodizing: in a low-temperature electrolyte (such as sulfuric acid or mixed acid solution), under high current density (2.5-5 A / dm²) and low temperature (0-5°C) conditions, an alumina ceramic layer (wear-resistant layer 5) with a thickness of 30-50μm is generated; sealing treatment: micropores are sealed by boiling water or steam to improve the density and corrosion resistance of the coating.

[0019] Lubrication structure processing, oil groove processing (suitable for dynamic lubrication scenarios): Lubrication structures 3 are processed on the surface of the wear-resistant layer 5 by CNC engraving or precision milling, such as spiral oil grooves (lead angle 15°-30°), herringbone oil grooves (angle 60°-90°), or diamond-shaped oil grooves (grid size 1-3mm). Pits texture array processing (suitable for boundary lubrication scenarios): A micro-pit array 7 with a depth of 10-30μm and a diameter of 0.1-0.5mm is formed on the surface of the wear-resistant layer using laser engraving or photochemical etching processes, with a density of 20-50 pits / cm². Post-processing and inspection cleaning removes processing residues, and grease or solid lubricant (such as PTFE) is soaked to enhance initial lubrication performance.

[0020] Furthermore, referring to Figure 1-3 It is worth noting that the end of the bushing body 1 is provided with a flared chamfer to facilitate insertion.

[0021] In actual use, the end structure is treated by machining flared chamfers (introduction angle 15°-30°) at both ends of the bushing body 1 to facilitate the introduction of the shaft during installation and avoid scratching the mating surface at the edges.

[0022] Furthermore, referring to Figure 1-3 It is worth noting that the bushing body 1 is a bimetallic composite structure, including a steel backing layer 4 as a supporting substrate and an aluminum-based wear-resistant alloy layer sintered or cast on the inner surface of the steel backing layer 4.

[0023] In practical use, the first step is the selection and preparation of the bushing body material. High silicon aluminum alloy is selected as the base material of bushing body 1, or a bimetallic composite structure is adopted. Bimetallic structure: low carbon steel is used as the steel backing layer 4, and an aluminum-based wear-resistant alloy layer (such as high silicon aluminum alloy) is composited on its inner surface through sintering or casting process to form a metallurgical bond. The bushing body 1 is formed by precision machining (such as turning and grinding) to ensure dimensional accuracy and surface finish.

[0024] The wear-resistant aluminum bushing structure provided by this utility model has been described above. Specific preferred embodiments have been used to illustrate the principle and implementation of this utility model. These embodiments are only used to help understand the principle and core idea of ​​this utility model. It should be noted that for those skilled in the art, the implementation schemes in the above embodiments can be further combined or replaced without departing from the design concept of this utility model, and several improvements and modifications can be made to this utility model. These improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A wear-resistant aluminum bushing structure, comprising a bushing body (1) made of aluminum alloy, characterized in that: The inner and outer walls of the bushing body (1) are provided with a wear-resistant layer (5) and a lubrication structure; The wear-resistant layer (5) is an alumina ceramic layer formed on its inner surface by hard anodizing, and the lubrication structure is processed on the surface of the wear-resistant layer (5). The lubrication structure includes an oil groove (6) disposed on the surface of the wear-resistant layer (5).

2. The wear-resistant aluminum bushing structure according to claim 1, characterized in that: The oil groove (6) is one of a spiral oil groove, a herringbone oil groove or a diamond-shaped oil groove, and the lubrication structure also includes a pit texture (7) provided on the surface of the wear-resistant layer (5).

3. The wear-resistant aluminum bushing structure according to claim 2, characterized in that: The bushing body (1) is made of high silicon aluminum alloy.

4. The wear-resistant aluminum bushing structure according to claim 3, characterized in that: The bushing body (1) is a bimetallic composite structure, including a steel backing layer (4) as a supporting substrate and an aluminum-based wear-resistant alloy layer sintered or cast on the inner surface of the steel backing layer (4).

5. The wear-resistant aluminum bushing structure according to claim 4, characterized in that: The end of the bushing body (1) is provided with a flared chamfer for easy insertion.

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