Alloy / bamboo chip multilayer composite material and preparation process

Abstract

The invention discloses an alloy / bamboo chip multi-layer composite material and a preparation process, the structure of the multi-layer composite material is formed by alternately arranging alloy sheets / bamboo chip sheets, and a binder is arranged between every two adjacent sheets; the outer surface of the end part of the multi-layer composite material is used as a friction surface, and the surface of the thin plate is perpendicular to the growth axial direction of the bamboo chip, so that the axial vascular bundle in the bamboo chip is perpendicular to the friction surface at the upper end; and according to the thickness dimension, the ratio of the alloy thin plate to the bamboo sheet thin plate is 1: 9-2: 1. The multi-layer composite material is obtained in a sheet layer stacking and bonding mode, the outer surfaces of the ends of the multi-layer composite material serve as friction surfaces, and the groove texture and bamboo fiber oil storage design is introduced into the outer surfaces of the ends of the multi-layer composite material, so that the tribological performance of the multi-layer composite material is remarkably improved, and the friction performance of the multi-layer composite material is improved. Therefore, a novel material capable of being used for a humanoid robot friction part is obtained, and light weight, high strength, excellent tribological performance and environmental friendliness are achieved.

Description

Technical Field

[0001] This invention relates to the field of humanoid robot hardware manufacturing, and in particular to an alloy / bamboo multilayer composite material and its preparation process. Background Technology

[0002] The applications of humanoid robots are expanding, extending to non-industrial sectors such as home and outdoor services. In these applications, the robots' activity range and tasks become more complex, the working environments more unpredictable, and the working hours tend to be longer. This poses a significant challenge to the energy storage capacity of humanoid robots. For humanoid robots operating in large spaces, fixed wiring is not feasible for power supply, making battery storage the only option. Given limited battery storage, the robot's weight becomes a crucial factor; even reducing weight by tens or hundreds of grams is significant. Therefore, achieving lighter humanoid robots while maintaining the same performance is an inevitable choice.

[0003] On the other hand, the sophistication and flexibility of humanoid robots rely heavily on numerous joint structures. Whether walking, turning, grasping, or bending, a large number of joints play a crucial role. These joints involve a significant number of friction components, including bearings, which together constitute a substantial proportion of the humanoid robot's total weight. Minimizing the weight of these friction components would significantly reduce the overall weight of the humanoid robot. Currently, lightweighting of humanoid robot friction components primarily utilizes lightweight alloys such as magnesium alloys and polymer materials such as PEEK. However, the tribological properties of high-strength lightweight alloys need improvement, and while lower-density PEEK polymers offer better tribological properties, their low strength remains a challenge. As the number of humanoid robots increases in the future, the degradation and environmental impact of polymer materials will become even more prominent issues. Currently, most friction components of humanoid robot joints are made from a single material, such as magnesium alloy sleeves or PEEK bearings. Some technologies improve the tribological properties of friction components by modifying the surface with anti-friction and wear-resistant coatings or by using laser texturing technology for surface post-treatment. However, due to high costs, complex processes, and the fact that performance still needs improvement, these existing technologies cannot effectively solve the problems that humanoid robots will soon face.

[0004] Therefore, there is a need to develop a new material for friction components of humanoid robots that can reduce weight while maintaining strength, tribological properties, and environmental friendliness. This is important for the application of humanoid robots in non-industrial fields. Summary of the Invention

[0005] The purpose of this invention is to provide an alloy / bamboo multilayer composite material and its preparation process. The material uses a light alloy and low-density bamboo as the main components, and obtains a multilayer composite material by layer-by-layer bonding. The outer surface of the end of the multilayer material is used as the friction surface. Grooves and bamboo fiber oil storage design are introduced into the outer surface of the end of the multilayer composite material to significantly improve the tribological properties of the multilayer composite material. This results in a new material that can be used for friction components of humanoid robots, achieving lightweight, high strength, excellent tribological properties, and environmental friendliness.

[0006] The present invention discloses an alloy / bamboo multilayer composite material, employing the following technical solution: The multilayer composite material structure is composed of alternating alloy thin plates and bamboo thin plates, with an adhesive between adjacent plates. Adjacent plates can be of the same material or different materials. The outer surface of the end of the multilayer composite material serves as a friction surface, which is completely different from the application of material surfaces as friction surfaces in existing technologies. Alloy thin plates and bamboo thin plates are alternately distributed on the outer surface of the end of the multilayer composite material, thus enabling both materials to fully participate in friction and wear during the friction process. The surface of the bamboo thin plates on the outer surface of the end is perpendicular to the growth axis of the bamboo itself, making the axial vascular bundles in the bamboo perpendicular to the upper friction surface. This design provides the possibility for storing lubricating media in the unique internal fiber space of the vascular bundles. Based on thickness, the ratio of alloy thin plates to bamboo thin plates is 1:9 to 2:1, which can be selected according to the different joint positions of the composite material applied to humanoid robots. The thickness of a single alloy thin plate is 0.05-0.5 mm, and the thickness of a single bamboo thin plate is 0.5-1 mm. mm; the alloy sheet is a magnesium alloy, titanium alloy, or aluminum alloy; the thickness of the adhesive between any two layers of the multilayer composite material does not exceed 10 micrometers.

[0007] Preferably, the bamboo sheet is made from moso bamboo, and both the inner and outer skins of the moso bamboo are peeled to obtain a flat, long strip of thin sheet.

[0008] Preferably, after the multilayer composite material is prepared, it is immersed in lubricating oil under normal pressure for no less than 5 hours or under pressure for no less than 1 hour.

[0009] Preferably, the outer surface of the end of the multilayer composite material further includes a groove texture, which is formed by adjusting the position of the upper end face of one or more alloy sheets downward.

[0010] Preferably, alloy sheets are provided on both sides of any bamboo sheet.

[0011] Preferably, the depth of the groove texture is 0.5-1 mm and the width of the groove texture is 0.1-0.5 mm.

[0012] Preferably, the bottom and sides of the multilayer composite material are placed in a base, which is configured according to the shape of the friction component of the humanoid robot joint and is used for installation in the humanoid robot joint.

[0013] The present invention discloses a preparation process for an alloy / bamboo multilayer composite material, the technical solution of which includes the following steps: S1. Determine the outer surface shape of the end of the multilayer composite material based on the shape of the joint component. Use this shape as the upper surface of the multilayer composite material. Then, slice and decompose the upper surface to obtain the required outer surface shape of the end at different locations. S2, Based on the distribution of the end outer surface at different positions obtained in the previous step, select the thickness, width, quantity and arrangement of the alloy sheet and the bamboo sheet. The upper surface of the bamboo sheet is perpendicular to the axis of the bamboo sheet itself, the axial vascular bundle in the bamboo sheet is perpendicular to the friction surface, and determine the corresponding upper surface shape of the alloy sheet and the bamboo sheet at different positions. S3, pre-process the corresponding upper edge edges of the alloy sheet and bamboo sheet according to the shape of the previous step; according to the tribological performance requirements of the friction component, introduce groove texture into the multilayer composite material, and form a multilayer composite material with different texture parameters on the outer surface of the end by pre-adjusting the upper edge position of the alloy sheet at the corresponding position downward. S4. Adjacent alloy sheet units and bamboo sheet units are bonded one by one using an organic adhesive and placed in a set position. The two sides of the bonded multilayer composite material are then pressure-cured to obtain a multilayer composite material suitable for humanoid robot joints. For multilayer composite materials that require better lubrication performance, after the multilayer composite material has been fully air-dried, the friction surfaces are soaked in lubricating oil, allowing the lubricating oil to penetrate and be stored through the axial vascular bundles on the upper surface of the bamboo sheet.

[0014] Compared with the prior art, the technical solution of the present invention has the following advantages: First, this invention uses lightweight alloy sheets and bamboo sheets as basic units to form a multi-layer composite material, which balances low density, high strength, and environmental friendliness, showing great promise for development and application. The lightweight alloy sheets in the multi-layer composite material ensure strength, while the bamboo sheets further reduce density. As a completely environmentally friendly and biodegradable material, bamboo not only has a lower density, but its density is also significantly lower than that of PEEK, commonly used in humanoid robots. Introducing it into the multi-layer composite material of this invention is expected to further reduce the weight of friction components in humanoid robots, thereby achieving overall weight reduction.

[0015] Secondly, the multilayer composite material of the present invention uses its end outer surface as the friction surface and cleverly utilizes the height difference between the ends of the thin plates to conveniently introduce a groove texture, which can improve the tribological properties of the multilayer composite material. Unlike existing technologies that use the upper surface of the material as the friction surface, this invention uses the end outer surface of the multilayer material as the friction surface and conveniently obtains a groove texture by utilizing the height difference between the different thin plates on the end outer surface. Furthermore, the groove texture has a completely consistent cross-sectional shape and size in the depth direction, ensuring effective chip space during friction. This has significant advantages compared to existing technologies that use laser post-processing or extrusion processing to prepare textures.

[0016] Third, in the multilayer composite material of this invention, better tribological properties can be obtained by introducing a trace amount of oil lubrication on the friction surface. The longitudinal vascular bundles of the bamboo veneer on the outer surface of the end are themselves channels for the transport of water and nutrients in bamboo. After drying during the processing of the bamboo veneer, it can be reused as an oil storage channel, achieving oil locking when there is no extrusion pressure on the friction surface, and achieving continuous trace lubrication when friction and extrusion occur, significantly improving the lubrication state of the friction surface. The high proportion of longitudinal vascular bundles in bamboo can serve as an oil storage space to fully absorb oil during the pre-impregnation process, achieving an effective oil locking effect when no friction occurs. The multilayer composite material can form continuous trace oil lubrication at the extrusion points of the friction surface, significantly improving its lubrication.

[0017] Fourth, the preparation process of the multilayer composite material of the present invention is simple, efficient, and low-cost, making it suitable for large-scale application. The multilayer composite material of the present invention can be easily obtained using a thin-plate stacking and bonding process, and the subsequent oil impregnation treatment is also simple and easy to perform, making it very suitable for application in friction components of humanoid robots. Attached Figure Description

[0018] Figure 1 Schematic diagram of the overall structure of the multilayer composite material of the present invention Figure 2 Schematic diagram of the bamboo sheet structure of the multilayer composite friction surface of the present invention Figure 3 Schematic diagram of the cross-sectional structure of the multilayer composite material of the present invention Figure 4 A schematic diagram of the groove texture structure of the multilayer composite material of the present invention. Detailed Implementation

[0019] See Figures 1-3A multilayer composite material of alloy / bamboo strips is constructed by alternating alloy thin plates 1 and bamboo thin plates 2, with an adhesive (not shown in the figure) between adjacent thin plates. For multilayer composite materials with a set thickness, a single alloy thin plate / single bamboo thin plate can be used alternately, or multiple alloy thin plates or multiple bamboo thin plates can be stacked alternately as a unit. For example, for a 1mm alloy thin plate, two 0.5mm thick alloy thin plates can be used, or five 0.2mm thick alloy thin plates can be bonded together with an adhesive to form an alloy thin plate unit. Similarly, a similar selection can be made for bamboo thin plates.

[0020] In existing technologies, friction surfaces are typically surfaces of a single material, that is, the outer surface formed by the length and width directions of the material component, with only one material involved in the friction process. However, this invention differs significantly from existing technologies that use traditional material surfaces as friction surfaces. This invention, using a multilayer composite material, employs the end outer surface as the friction surface. This end outer surface refers to the outer surface formed by the thickness and width directions of the thin plate's end. The friction surface of this invention can be customized as needed; the corresponding end outer surface can be planar or curved. See also... Figure 1 As shown, the upper surface of the multilayer composite material is its end outer surface, which is also the friction surface of the multilayer composite material. In this embodiment, the prior art typically uses the complete surfaces on its left and right sides as the friction surface, which is either a single alloy sheet surface or a single bamboo sheet surface. However, the multilayer composite material of this invention uses the upper outer surface perpendicular to the complete surfaces on both sides as the friction surface. In this case, the friction surface is composed of alternating alloy sheets and bamboo sheets. In the case where the end outer surface is horizontal, it is parallel to the horizontal cross-section of the multilayer composite material. The alternating distribution of alloy sheets and bamboo sheets on the end outer surface of the multilayer composite material allows for full participation of different material sheets during friction. See also... Figure 2As a component of the multilayer composite friction surface, the surface of the bamboo sheet 2 is perpendicular to the growth axis of the bamboo itself, making the axial vascular bundles 21 in the bamboo perpendicular to the friction surface of the outer end. Thus, during friction, the vascular bundles can serve as a storage space and transport channel for the lubricating medium. Based on thickness, the ratio of alloy sheet to bamboo sheet is 1:9 to 2:1. The higher proportion of bamboo sheet ensures a further reduction in the density of the multilayer composite material, thereby achieving effective weight reduction for the humanoid robot. Preferably, the ratio of alloy sheet to bamboo sheet is 1:9, 1:4, 1:1, or 2:1. The thickness of a single alloy sheet is 0.05-0.5 mm, preferably 0.05 mm, 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm, or 0.5 mm, and the thickness of a single bamboo sheet is 0.5-1 mm. The thickness of the bamboo sheet is preferably 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, or 1 mm. To achieve uniform performance, the alloy sheet and the bamboo sheet are evenly distributed on the outer surface of the ends. The alloy sheet is a magnesium alloy, titanium alloy, or aluminum alloy, preferably a TC4 titanium alloy. The thickness of the adhesive between any two layers of the multilayer composite material does not exceed 10 micrometers. Preferably, the adhesive is a commonly used organic adhesive, including epoxy resin, or an environmentally friendly adhesive, including natural latex. To better achieve a strong bond in the multilayer composite material, as a preferred embodiment, after the multilayer composite material is assembled into the shape of the friction component, a polymer film can be used again on the outer surface for overall bonding and reinforcement. Taking a sample with a 1:4 ratio of alloy sheet to bamboo sheet and a total cross-sectional thickness of 100mm as an example, we selected individual 0.2mm alloy sheets and individual 0.8mm bamboo sheets as the samples. One approach is to repeatedly arrange and combine "a single 0.2mm alloy sheet / a single 0.8mm bamboo sheet" 100 times. Another approach is to repeatedly arrange and combine "a single 0.2mm alloy sheet / a single 0.2mm alloy sheet / a single 0.8mm bamboo sheet / a single 0.8mm bamboo sheet" 50 times. For friction components with low dimensional accuracy requirements, the thickness of the adhesive can be ignored. For friction components with high dimensional accuracy requirements, fine-tuning can be achieved by adjusting the number of alloy sheets and bamboo sheets, or by using thinner sheets in localized areas instead of thicker sheets.

[0021] Furthermore, the bamboo strips are made from moso bamboo, which is a type of bamboo with a large planting area and output in China. It is easy to obtain bamboo strips with a thickness of about 1mm, and the cost is low, which is conducive to the later application and promotion.

[0022] Furthermore, after the multilayer composite material is prepared, it is immersed in lubricating oil at normal pressure for at least 5 hours or under pressure for at least 1 hour. During the immersion process, it is ensured that the axial vascular bundles of the bamboo veneer cross-section are all submerged in the lubricating oil, thereby achieving sufficient absorption of the lubricating oil. Since the surface of the bamboo veneer cross-section 2 is perpendicular to the growth axis of the bamboo itself, a longer immersion in lubricating oil at normal pressure or a shorter immersion under pressure can ensure that the lubricating oil is fully absorbed into the axial vascular bundles of the bamboo, resulting in pre-existing lubricating oil in the multilayer composite material. Higher pressure requires only a shorter immersion time, which can be determined based on the sample size, lubricating oil composition, and pressure conditions. For the outer end surface of the multilayer composite material after soaking, as a friction surface, the vascular bundle itself can lock in oil when there is no extrusion pressure. During the process of friction between the friction surfaces, a small amount of lubricating oil appears on the cross-section of the bamboo sheet on the friction surface and is further continuously carried into the cross-section of the alloy sheet on the friction surface, generating a demand-based self-lubricating effect, thus forming effective long-term lubrication. This design is particularly suitable for humanoid robot service scenarios where external lubrication is not possible, and the lubrication effect is significantly better than that of solid lubricants.

[0023] Further, see Figure 4 The outer surface of the multilayer composite material also includes a groove texture 3, which is achieved by adjusting the position of the upper end face of one or more alloy thin plates 1 downward to form a height difference. Surface texture is one of the effective ways to improve the tribological properties of materials. In the prior art, it is usually prepared by laser post-processing on a complete surface. The texture prepared in this way will lead to uncontrollable phenomena such as bulges at the texture edge. Moreover, the texture prepared by laser method is mostly a V-shaped conical structure. The actual space of the texture is much smaller than the design value. There is also a large difference between the design value and the actual value in the texture depth direction. All of these factors greatly limit the degree to which the texture can improve the tribological properties. The outer end surface of the present invention serves as a friction surface, enabling both thin plates of two materials to directly and effectively participate in the friction process. It also makes the preparation of the texture convenient and controllable. The introduction of the texture adopts a novel method, namely, using the precise height difference between adjacent thin plates to prepare the groove texture with corresponding dimensional parameters. Thus, the required depth of groove texture can be obtained by precisely controlling the size of adjacent thin plates. Furthermore, the corresponding width of groove texture can be obtained by adjusting the thickness and number of alloy thin plates lower than the upper surface of the outer end surface of the multilayer composite material.

[0024] Furthermore, alloy plates are provided on both sides of each bamboo sheet. The alternating design of the alloy plates and bamboo sheets allows the alloy plates to supplement the strength and wear resistance of the bamboo sheets.

[0025] Furthermore, the depth of the groove texture is 0.5-1 mm, preferably 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, or 1 mm; the width of the groove texture is 0.1-0.5 mm, preferably 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm, or 0.5 mm. Regarding the texture density, it is calculated using the ratio of the groove texture area to the entire cross-section of the multilayer composite material, which is 10%-30%. The groove texture of this invention is fabricated by reducing the height using alloy thin plates. This design effectively ensures the width of the groove texture through the higher strength of the alloy thin plates, preventing the texture width from being affected by insufficient strength.

[0026] Furthermore, the bottom and sides of the multilayer composite material are placed in a base, which is designed according to the shape of the friction components of the humanoid robot joint and is used for installation in the humanoid robot joint. Compared with alloy materials or polymer materials such as PEEK, bamboo has relatively poor machinability and is difficult to easily obtain the required structures and shapes through casting, extrusion, or subsequent machining. Therefore, a metal base is needed to solve the problem of difficult machining of multilayer composite materials at specific locations such as the edges of friction workpieces. Since the friction components of joints in different parts of the humanoid robot may have different shapes, the machining problem of multilayer composite materials can be well solved by using a combination structure of base and surface layer. For example, for the friction components of the lead screw, a structure of a middle core rod matrix plus an outer surface multilayer composite material can be used; for the bearing sleeve, a structure of an outer shell matrix plus an inner surface multilayer composite material can be used.

[0027] The present invention discloses a preparation process for an alloy / bamboo multilayer composite material, comprising the following steps: S1. Determine the shape of the friction surface based on the shape of the joint component, and use it as the upper end surface of the multilayer composite material. Then, slice and decompose the upper surface so that the thin plate is the smallest unit of the slice. Obtain the required outer surface shape of the thin plate at different positions. The slicing and decomposition process in this step can be simulated using drawing software such as SolidWorks, so as to determine the outer surface shape of the thin plate at different positions. S2, based on the end surface distribution at different locations obtained in the previous step, and based on the working conditions and design ratio, select the thickness, width, quantity, and arrangement of alloy sheet and bamboo sheet. For higher lightweight requirements, use a higher proportion of bamboo sheet; for higher strength requirements, use a higher proportion of alloy sheet. The upper surface of the bamboo sheet is perpendicular to the axial direction of the bamboo sheet itself, and the axial vascular bundles in the bamboo sheet are perpendicular to the friction surface. Determine the corresponding upper surface shape of the alloy sheet and bamboo sheet at different locations. Considering the full utilization of bamboo sheet material, small-sized bamboo sheets can be constructed by sequentially splicing multiple small bamboo sheets in the width direction. The upper surface of each small bamboo sheet is perpendicular to the axial direction of the bamboo sheet itself. Considering the smooth intake of lubricating oil later, bamboo sheets cannot be spliced ​​in the length direction. S3, pre-process the corresponding upper edge edges of the alloy sheet and bamboo sheet according to the shape of the previous step; further, according to the tribological performance requirements of the friction component, introduce groove texture into the multilayer composite material, and form a multilayer composite material with different parameter textures on the outer surface of the end by pre-adjusting the position of the upper edge of the alloy sheet at the corresponding position downward. S4. Adjacent alloy sheet units and bamboo sheet units are bonded one by one using epoxy resin adhesive. The alloy sheet unit can be composed of one or more alloy sheets, and the bamboo sheet unit can be composed of one or more bamboo sheets. They are placed in a set position, and all adjacent sheets are bonded with adhesive. Then, the two sides of the bonded multilayer composite material are pressed and cured using mechanical methods such as clamps or heavy objects to obtain a multilayer composite material suitable for humanoid robot joints. For multilayer composite materials that require better lubrication performance, after the multilayer composite material has been fully air-dried, the friction surface is soaked in lubricating oil under normal or pressurized conditions. This allows the lubricating oil to penetrate and be stored through the axial vascular bundles on the upper surface of the bamboo sheet. The lubricating oil can be selected according to the actual lubricating oil used in different locations, and friction-reducing and wear-resistant additives can also be added to the lubricating oil as needed.

[0028] This invention discloses an alloy / bamboo multilayer composite material and its preparation process. Using a lightweight alloy and bamboo as thin sheets, a multilayer composite material is obtained by layering and bonding the sheets. A grooved texture is cleverly introduced by utilizing the height difference between the end faces of the thin sheets, and the vascular bundle fibers of the bamboo are used to store oil. This forms a long-lasting, micro-oil supply on the friction surface of the outer end, significantly improving the tribological properties of the multilayer composite material. This results in a novel material that can be used for friction components in humanoid robots, achieving lightweight, high strength, excellent tribological properties, and environmental friendliness.

Claims

1. A multilayer alloy / bamboo composite material, characterized in that, The multilayer composite material is constructed by alternating alloy sheets and bamboo sheets, with an adhesive between adjacent sheets. The outer surface of the ends of the multilayer composite material serves as a friction surface, with alloy sheets and bamboo sheets alternately distributed on the outer surface. The surface of the bamboo sheets on the outer surface is perpendicular to the growth axis of the bamboo, making the axial vascular bundles in the bamboo perpendicular to the friction surface at the upper end. The ratio of alloy sheets to bamboo sheets is 1:9 to 2:1 in terms of thickness. The thickness of a single alloy sheet is 0.05-0.5 mm, and the thickness of a single bamboo sheet is 0.5-1 mm. The alloy sheets are made of magnesium alloy, titanium alloy, or aluminum alloy.

2. The multilayer composite material according to claim 1, characterized in that, The bamboo sheet is made from processed moso bamboo.

3. The multilayer composite material according to claim 1, characterized in that, After the multilayer composite material is prepared, it is immersed in lubricating oil under normal pressure for no less than 5 hours or under pressure for no less than 1 hour.

4. The multilayer composite material according to claim 1, characterized in that, The outer surface of the multilayer composite material also includes a groove texture, which is formed by adjusting the position of the upper end face of one or more alloy sheets downwards.

5. The multilayer composite material according to claim 1, characterized in that, Each bamboo sheet has alloy sheets on both sides.

6. The multilayer composite material according to claim 4, characterized in that, The depth of the groove texture is 0.5-1 mm, and the width of the groove texture is 0.1-0.5 mm.

7. The preparation process of the alloy / bamboo multilayer composite material according to any one of claims 1-6, characterized in that, Includes the following steps: S1. Determine the outer surface shape of the end of the multilayer composite material based on the shape of the joint component, use it as the upper surface of the multilayer composite material, and slice and decompose the upper surface to obtain the required end outer surface shape at different positions. S2, Based on the distribution of the end outer surface at different positions obtained in the previous step, select the thickness, width, quantity and arrangement of the alloy sheet and the bamboo sheet. The upper surface of the bamboo sheet is perpendicular to the axis of the bamboo sheet itself, the axial vascular bundle in the bamboo sheet is perpendicular to the friction surface, and determine the corresponding upper surface shape of the alloy sheet and the bamboo sheet at different positions. S3, pre-process the corresponding upper edge edges of the alloy sheet and bamboo sheet according to the shape of the previous step; S4. Adhesive is used to bond adjacent alloy sheet units and bamboo sheet units one by one, and they are placed in the set position. The two sides of the bonded multilayer composite material are pressure-cured to obtain multilayer composite material. For multilayer composite materials that require better lubrication performance, the friction surface is treated with lubricating oil immersion treatment, so that the lubricating oil can penetrate and be stored through the axial vascular bundles on the upper end face of the bamboo sheet.

8. The processing method according to claim 7, characterized in that, In step 3, according to the tribological performance requirements of the friction component, a groove texture is introduced into the outer surface of the end of the multilayer composite material. By adjusting the position of the upper end face of the alloy sheet at the corresponding position downward in advance, a multilayer composite material with different parameter textures on the outer surface of the end is formed.

Images