CN219795836U - Aluminum alloy base composite member and electronic equipment - Google Patents
Aluminum alloy base composite member and electronic equipment Download PDFInfo
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- CN219795836U CN219795836U CN202321390049.3U CN202321390049U CN219795836U CN 219795836 U CN219795836 U CN 219795836U CN 202321390049 U CN202321390049 U CN 202321390049U CN 219795836 U CN219795836 U CN 219795836U
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Abstract
The utility model discloses an aluminum alloy-based composite member and electronic equipment, wherein the aluminum alloy-based composite member comprises an aluminum alloy matrix and at least one high-strength metal insert, the at least one high-strength metal insert is connected with the aluminum alloy matrix and is used as a bearing part and/or a friction part of the aluminum alloy-based composite member, and the strength of the high-strength metal insert is higher than that of the aluminum alloy matrix. According to the utility model, the high-strength metal insert is arranged as the bearing part and/or the friction part of the aluminum alloy-based composite component, so that the strength and the friction resistance of the component can be improved; meanwhile, the density of the aluminum alloy matrix is lower, the quality of the component can be effectively reduced, and the light-weight requirement is met, so that the aluminum alloy matrix composite component has the characteristics of high strength, light weight and high wear resistance, and the technical problem that materials of parts in the head-mounted display equipment in the prior art are difficult to meet the requirements of light weight, high strength and high wear resistance simultaneously is solved.
Description
Technical Field
The utility model relates to the technical field of metal composite materials, in particular to an aluminum alloy base composite component and electronic equipment.
Background
With the development of 5G (5 th Generation Mobile Communication Technology, fifth generation mobile communication technology), blockchain, cloud computing, next generation internet technology, and the like, electronic products such as mobile phones, tablet computers, notebook computers, AR (Augmented Reality) and Virtual Reality (VR) devices are developing towards light weight and portable miniaturization, and metal precision parts are greatly developed as important parts of consumer electronic products, especially, head-mounted display devices represented by AR/VR devices have higher requirements for light weight and experience. The head of a human body has high weight sensitivity to wearing products, and the consumers can feel uncomfortable due to the overweight products, so that the comfort level is reduced, and the structural weight reduction is an important development direction for improving the customer experience. Because of the complex structure and small volume, the parts in the head-mounted display device have high requirements on strength and wear resistance besides the light weight requirement, for example, the precision hardware such as the AR glasses rotating shaft can be repeatedly folded during wearing, and the whole life cycle of the precision hardware can be folded for more than 5 ten thousand times, so the parts such as the rotating shaft have the requirements on high strength and high wear resistance so as to prevent the parts from being damaged during wearing or folding.
However, it is difficult for the materials of the components in the head-mounted display device to satisfy the requirements of light weight, high strength and high wear resistance at the same time.
Disclosure of Invention
The utility model mainly aims to provide an aluminum alloy-based composite component and electronic equipment, and aims to solve the technical problem that materials of parts in the head-mounted display equipment in the prior art are difficult to meet requirements of light weight, high strength and high wear resistance.
To achieve the above object, the present utility model provides an aluminum alloy-based composite member comprising:
an aluminum alloy substrate; the method comprises the steps of,
at least one high-strength metal insert connected with the aluminum alloy matrix and serving as a bearing part and/or friction part of the aluminum alloy matrix, wherein the strength of the high-strength metal insert is higher than that of the aluminum alloy matrix.
Optionally, the high strength metal insert has a strength greater than 900MPa and a vickers hardness greater than 350HV; and/or the number of the groups of groups,
the strength of the aluminum alloy in the aluminum alloy matrix is greater than 200MPa; and/or the number of the groups of groups,
the aluminum alloy matrix comprises an aluminum alloy insert and an aluminum alloy connecting piece.
Optionally, the material of the high strength metal insert comprises steel and/or titanium alloy.
Optionally, the material of the high-strength metal insert comprises steel, wherein the steel comprises any one of Mn13 high manganese steel, 17-4PH alloy stainless steel and GCr15 steel; and/or the number of the groups of groups,
the high-strength metal insert is made of titanium alloy, wherein the titanium alloy comprises any one of TC4 titanium alloy, TC10 titanium alloy, TC3 titanium alloy and TA7 titanium alloy.
Optionally, the aluminum alloy-based composite member is a hinge, a gear, a rotating shaft assembly, or a friction pair.
Optionally, the aluminum alloy-based composite member is a hinge, and the high-strength metal insert is a hinge mounting portion of the hinge; or alternatively, the first and second heat exchangers may be,
the aluminum alloy-based composite member is a gear, and the high-strength metal insert is a gear tooth part of the gear; or alternatively, the first and second heat exchangers may be,
the aluminum alloy-based composite member is a rotating shaft, and the high-strength metal insert is a joint of the rotating shaft; or alternatively, the first and second heat exchangers may be,
the aluminum alloy-based composite member is a friction pair, and one side surface of the high-strength metal insert forms a friction surface of the friction pair.
Optionally, the aluminum alloy-based composite member includes two oppositely disposed mounting portions including at least a portion of a high strength metal insert.
Optionally, the mounting portion is provided in a ring shape, the high-strength insert forms part of the mounting portion, and the rest of the mounting portion is formed by the aluminum alloy matrix.
The utility model also proposes an electronic device comprising an aluminium alloy based composite member comprising:
an aluminum alloy substrate; the method comprises the steps of,
at least one high-strength metal insert connected with the aluminum alloy matrix and serving as a bearing part and/or friction part of the aluminum alloy matrix, wherein the strength of the high-strength metal insert is higher than that of the aluminum alloy matrix.
Optionally, electronic equipment is glasses, glasses include mirror leg, picture frame and pivot subassembly, the mirror leg pass through pivot subassembly rotate connect in the picture frame, the pivot subassembly includes aluminum alloy base composite member, aluminum alloy base composite member is located the accommodation space that picture frame and mirror leg constitute.
Optionally, the aluminum alloy-based composite member includes two oppositely disposed high strength metal inserts, and projections of the two high strength metal inserts in a predetermined direction at least partially overlap.
Optionally, the electronic device is a head-mounted display device, and the aluminum alloy-based composite member is disposed at a turnover structure between a host of the head-mounted display device and a head band.
In the technical scheme of the utility model, the aluminum alloy-based composite member comprises an aluminum alloy matrix and at least one high-strength metal insert, wherein the at least one high-strength metal insert is connected with the aluminum alloy matrix and is used as a bearing part and/or a friction part of the aluminum alloy-based composite member, and the strength of the high-strength metal insert is higher than that of the aluminum alloy matrix; thus, by providing the high-strength metal insert as the bearing part and/or friction part of the aluminum alloy-based composite member, the strength and friction resistance of the member can be improved; meanwhile, the density of the aluminum alloy matrix is lower, the quality of the component can be effectively reduced, and the light-weight requirement is met, so that the aluminum alloy matrix composite component has the characteristics of high strength, light weight and high wear resistance, and the technical problem that materials of parts in the head-mounted display equipment in the prior art are difficult to meet the requirements of light weight, high strength and high wear resistance simultaneously is solved.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
FIG. 1 is an exemplary stress diagram of an aluminum alloy-based composite component provided by the present utility model;
FIG. 2 is a cross-sectional view of a first embodiment of an aluminum alloy-based composite member in accordance with the present utility model;
FIG. 3 is a top view of the aluminum alloy matrix composite member of FIG. 2;
FIG. 4 is a cross-sectional view of a second embodiment of an aluminum alloy-based composite member in accordance with the present utility model;
FIG. 5 is a cross-sectional view of a third embodiment of an aluminum alloy-based composite member in accordance with the present utility model;
fig. 6 is a cross-sectional view of a fourth embodiment of an aluminum alloy-based composite member in accordance with the present utility model.
Reference numerals illustrate:
| reference numerals | Name of the name | Reference numerals | Name of the name |
| 10 | Aluminum alloy matrix | 12 | Aluminum alloy connecting piece |
| 11 | Aluminum alloy insert | 20 | High strength metal inserts |
The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
It should be noted that, if directional indications (such as up, down, left, right, front, and rear … …) are included in the embodiments of the present utility model, the directional indications are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed.
In addition, if there is a description of "first", "second", etc. in the embodiments of the present utility model, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" as it appears throughout includes three parallel schemes, for example "A and/or B", including the A scheme, or the B scheme, or the scheme where A and B are satisfied simultaneously. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.
With the development of 5G (5 th Generation Mobile Communication Technology, fifth generation mobile communication technology), blockchain, cloud computing, next generation internet technology, and the like, electronic products such as mobile phones, tablet computers, notebook computers, AR (Augmented Reality) and Virtual Reality (VR) devices are developing towards light weight and portable miniaturization, and metal precision parts are greatly developed as important parts of consumer electronic products, especially, head-mounted display devices represented by AR/VR devices have higher requirements for light weight and experience. The head of a human body has high weight sensitivity to wearing products, and the consumers can feel uncomfortable due to the overweight products, so that the comfort level is reduced, and the structural weight reduction is an important development direction for improving the customer experience. Because of the complex structure and small volume, the parts in the head-mounted display device have high requirements on strength and wear resistance besides the light weight requirement, for example, the precision hardware such as the AR glasses rotating shaft can be repeatedly folded during wearing, and the whole life cycle of the precision hardware can be folded for more than 5 ten thousand times, so the parts such as the rotating shaft have the requirements on high strength and high wear resistance so as to prevent the parts from being damaged during wearing or folding.
However, it is difficult for the materials of the components in the head-mounted display device to satisfy the requirements of light weight, high strength and high wear resistance at the same time.
Further researches of the inventor show that the steel has high strength which can reach more than 1500MPa, good wear resistance, low cost and rich yield, is very suitable for manufacturing small-sized precise hardware such as mobile phone clamping brackets, ejector pins, gear precise rotating shafts and the like, but the steelDensity of about 7.8g/cm 3 The method is not suitable for intelligent wearing products with strong demand on light weight; titanium alloys have certain advantages of light weight over steel, but titanium alloys are costly and difficult to process.
For light weight, aluminum alloy materials are commonly selected at present, and the density of the aluminum alloy is 2.7g/cm 3 The aluminum alloy is particularly favorable for light weight and can meet the requirements of general loads, however, because the aluminum alloy is low in strength and poor in wear resistance, the aluminum alloy can be only used as a shell material generally, cannot meet the wear resistance requirements of small-sized precise hardware on intelligent wearing products, is not suitable for manufacturing small-sized precise hardware such as precise rotating shafts, and the like, and in order to improve the wear resistance of aluminum, a wear-resistant coating layer, such as an anodic oxidation coating layer, a micro-arc oxidation coating layer, an electroplated layer, a magnetron sputtering layer and the like, can be formed on the surface of the aluminum alloy at present so as to enhance the wear resistance of the aluminum alloy, but the substrate of the aluminum alloy is softer, the coating is easy to fall off, and the wear resistance requirements are still difficult to meet. That is, it is difficult for the materials of the components in the head-mounted display device at present to satisfy the requirements of light weight, high strength and high wear resistance at the same time.
Based on the above-mentioned studies, the present utility model proposes an aluminum alloy-based composite member, and fig. 1 to 5 show some embodiments of the aluminum alloy-based composite member according to the present utility model. Specifically, in an embodiment of the present utility model, the aluminum alloy-based composite member includes an aluminum alloy base 10 and at least one high-strength metal insert 20, the at least one high-strength metal insert 20 being connected to the aluminum alloy base 10 and serving as a bearing portion and/or a friction portion of the aluminum alloy-based composite member, the high-strength metal insert 20 having a strength higher than that of the aluminum alloy base 10.
Taking the aluminum alloy-based composite component sample shown in fig. 1 as an example, by detecting a stress diagram of the aluminum alloy-based composite component sample during use, a region with stress greater than a preset stress threshold value in the stress diagram (a lighter color part in fig. 1 is a region with stress greater than the preset stress threshold value) can be determined as a bearing part and/or a friction part of the aluminum alloy-based composite component, and the bearing part and/or the friction part uses a high-strength metal insert 20 to replace part of the aluminum alloy matrix 10. Thus, in the technical scheme of the utility model, the strength and the friction resistance of the member can be improved by arranging the high-strength metal insert 20 as the bearing part and/or the friction part of the aluminum alloy-based composite member; meanwhile, the aluminum alloy matrix 10 has lower partial density, so that the quality of the component can be effectively reduced, and the light-weight requirement is met, so that the aluminum alloy matrix composite component has the characteristics of high strength, light weight and high wear resistance, and the technical problem that the materials of parts in the head-mounted display equipment in the prior art are difficult to meet the requirements of light weight, high strength and high wear resistance simultaneously is solved.
In some embodiments of the utility model, the high strength metal insert 20 has a strength greater than 900MPa and a vickers hardness greater than 350HV at 10 kg. In this manner, the high strength metal insert 20 is better able to meet the strength and/or hardness requirements for its use as a load bearing and/or friction portion of the aluminum alloy-based composite component to ensure that the portion of the aluminum alloy-based composite component that requires load bearing and/or friction has sufficient strength and wear resistance.
The density of the aluminum alloy is about 2.7g/cm 3 The aluminum alloy matrix 10 is particularly beneficial to light weight, and can effectively reduce the quality of the prepared aluminum alloy matrix composite material, so that the quality of an intelligent wearing product processed by the aluminum alloy matrix composite material is reduced, the comfort level of the intelligent wearing product worn by a human body is improved, namely, the aluminum alloy mainly contributes to light weight, the strength can meet the general load requirement, specifically, in some embodiments of the utility model, the strength of the aluminum alloy in the aluminum alloy matrix 10 is more than 200MPa, and the overall quality of the finally prepared aluminum alloy matrix composite member can be reduced, so that the aluminum alloy matrix composite member meets the light weight requirement.
In some embodiments of the present utility model, the high strength metal insert 20 comprises steel and/or a titanium alloy. Specifically, when the number of the high-strength metal inserts 20 is one, the material may be steel or a titanium alloy, and when the number of the high-strength metal inserts 20 is two or more, the material of each high-strength metal insert 20 is steel or an iron alloy, and the materials of the plurality of high-strength metal inserts 20 may be the same or different, and may be selected according to the actual requirements, which falls within the scope of the present utility model.
The steel has high strength, high wear resistance up to 1500MPa, low cost and rich yield, and is suitable for making small precise hardware such as mobile phone card holder, thimble, gear precise rotating shaft, etc., but the density of the steel is about 7.8g/cm 3 The steel part of the obtained aluminum alloy-based composite member can be used for bearing force or contact friction by compounding the high-strength, high-wear-resistance and low-cost steel insert with the aluminum alloy, the part density of the aluminum alloy is lower, the quality of the aluminum alloy-based composite member can be effectively reduced, and the density of the prepared aluminum alloy-based composite member is 3.0-6.0g/cm 3 The requirement of light weight is met, and the finally prepared aluminum alloy-based composite member has the advantages of high strength, light weight, high wear resistance and low cost. In some embodiments of the utility model, the steel is an iron-carbon alloy material formed by adding proper amounts of one or more alloying elements on the basis of common carbon steel, including but not limited to any one of Mn13 high manganese steel, 17-4PH alloy stainless steel and GCr15 steel (high carbon chromium bearing steel). Further, when the high strength metal insert 20 is made of the steel, processes such as stamping, forging, metal powder injection molding, etc. may be used.
The density of the titanium alloy is about 4.5g/cm 3 The strength is about 1000MPa, the aluminum alloy composite member has certain light weight advantage relative to steel, the titanium alloy insert with high strength and high wear resistance is compounded with the aluminum alloy, the part of the titanium alloy in the obtained aluminum alloy composite member can be used for bearing force or contact friction, the part of the aluminum alloy has lower density, the quality of the aluminum alloy composite member can be effectively reduced, and the density of the prepared aluminum alloy composite member is 2.8-4.0g/cm 3 The requirement of light weight is met, and the finally prepared aluminum alloy-based composite member has the advantages of high strength, light weight and high wear resistance. In some embodiments of the utility model, the titanium alloy is an alloy made of titanium and other metalsThe metal material includes, but is not limited to, any one of TC4 titanium alloy (titanium alloy with an element composition of Ti-6 Al-4V), TC10 titanium alloy (titanium alloy with an element composition of Ti-6Al-6V-2Sn-0.5Cu-0.5 Fe), TC3 titanium alloy (titanium alloy with an element composition of Ti-5 Al-4V), and TA7 titanium alloy (titanium alloy with an element composition of Ti-5Al-2.5 Sn). Further, when the high-strength metal insert 20 is made of the titanium alloy, processes such as stamping, forging, metal powder injection molding, and the like may be employed.
The aluminum alloy body 10 and the high-strength metal insert 20 are connected in various ways, and for the processing of the component with a complex structure, the metal powder injection molding technology (Metal Injection Molding, abbreviated as MIM technology, is a novel manufacturing technology combining powder metallurgy and plastic molding technology) is simple and has low cost, so that in some embodiments of the present utility model, the aluminum alloy body 10 is molded by the metal powder injection molding technology and is connected with the high-strength metal insert 20. Specifically, the implementation manner may be, for example, that the high-strength metal insert 20 is first manufactured by punching, forging or metal powder injection molding, then the manufactured high-strength metal insert 20 is placed in a target region to be embedded (i.e. a position corresponding to a bearing portion and/or a friction portion of a target member) corresponding to a target mold, then an aluminum alloy feed is injected into the target mold in which the high-strength metal insert 20 is placed for injection molding, and then degreasing and sintering are performed to realize dissimilar metal diffusion of the aluminum alloy into the high-strength metal insert 20, so that metal atoms in the aluminum alloy and metal atoms in the high-strength metal insert 20 form a metal bond, and further the aluminum alloy substrate 10 and the high-strength metal insert 20 form a compact whole through sintering, so as to obtain the aluminum alloy-based composite member.
Specifically, fig. 2 and fig. 3 show a first embodiment of an aluminum alloy-based composite member according to the present utility model, where the aluminum alloy-based composite member includes an aluminum alloy substrate 10 and a high-strength metal insert 20, a through hole is reserved in the middle of the aluminum alloy substrate 10, the high-strength metal insert 20 is disposed in the through hole, and the high-strength metal insert 20 is disposed in a cylindrical shape. The preparation method can be that the cylindrical steel or titanium alloy material is firstly obtained as the high-strength metal insert 20 and is used as the main stress and wear-resistant part, the high-strength metal insert is put into a target region to be embedded of a target die, then the aluminum alloy feed is injected into the target die in which the high-strength metal insert 20 is placed for injection molding, and then degreasing and sintering are carried out to obtain the aluminum alloy composite material.
Fig. 4 shows a second embodiment of the aluminum alloy-based composite member, which includes an aluminum alloy matrix 10 and a high-strength metal insert 20 connected to one side of the aluminum alloy matrix 10. The preparation method can be that the high-strength metal insert 20 made of steel and titanium alloy is firstly obtained as a main stress and wear-resistant part, the high-strength metal insert is put into a target region to be embedded of a target die, then an aluminum alloy feed is injected into the target die in which the high-strength metal insert 20 is placed for injection molding, and then degreasing and sintering are carried out to obtain the high-strength metal insert.
And for processing components with simpler shapes and structures such as plates, the hot press forming, forging and other processes are simpler and the cost is lower, so that the aluminum alloy substrate 10 part can be firstly processed to obtain an aluminum alloy insert 11 through the hot press forming, forging and other processes which are simpler or the cost is lower than that of the metal powder injection molding, and then the aluminum alloy insert 11 and the high-strength metal insert 20 are connected into a whole. Specifically, in other embodiments of the present utility model, the aluminum alloy base 10 includes an aluminum alloy insert 11 and an aluminum alloy connector 12, and the aluminum alloy connector 12 is formed by a powder injection molding process and connects the aluminum alloy insert 11 and the high-strength metal insert 20. Further, the implementation manner may be, for example, that the high-strength metal insert 20 is first manufactured by punching, forging or metal powder injection molding, and the aluminum alloy insert 11 is manufactured by hot press molding, forging, or other processes, then the manufactured high-strength metal insert 20 and the aluminum alloy insert 11 are placed in the corresponding target to-be-embedded areas in the target mold, then the aluminum alloy feed is injected into the target mold in which the high-strength metal insert 20 and the aluminum alloy insert 11 are placed, injection molding is performed, and then degreasing and sintering are performed, so that the aluminum alloy-based composite member is manufactured, wherein the aluminum atoms in the aluminum alloy connecting piece 12 and the metal atoms in the high-strength metal insert 20 form a metal bond, so that the aluminum alloy matrix 10 and the high-strength metal insert 20 form a compact whole.
In the present embodiment, the aluminum alloy material in the aluminum alloy insert 11 and the aluminum alloy material in the aluminum alloy connecting member 12 may be the same or different, and all belong to the scope of the present utility model.
Referring specifically to fig. 5, in a third embodiment of the aluminum alloy-based composite member according to the present utility model, the aluminum alloy-based composite member includes an aluminum alloy insert 11, an aluminum alloy connector 12 and a high-strength metal insert 20, and the preparation method may include, for example, firstly, respectively obtaining the aluminum alloy insert 11 and the high-strength metal insert 20 made of steel or titanium alloy, then placing the aluminum alloy insert 11 and the high-strength metal insert 20 into a target region to be embedded of a target mold, then injecting an aluminum alloy feed into the target mold in which the high-strength metal insert 20 is placed for injection molding, and then degreasing and sintering.
The aluminum alloy feed according to the above embodiment of the present utility model is a mixture of aluminum alloy powder and binder, and the specific composition may refer to a conventional manner in conventional metal powder injection molding technology, and one implementation manner of the aluminum alloy feed adopted in the present utility model is provided below: the aluminum alloy feed comprises 65-85% of aluminum alloy powder and 15-35% of binder by volume, wherein the binder comprises polyethylene glycol, polymethyl methacrylate and stearic acid, and the volume percentages of the polyethylene glycol, the polymethyl methacrylate and the stearic acid are 65-85%, 14-30% and 1-5% respectively based on the volume of the binder being 100%. Further, the aluminum alloy powder includes a spherical aluminum alloy powder having a D50 (particle diameter corresponding to a cumulative particle size distribution percentage of one sample reaching 50%) of less than 45 μm and a D90 (particle diameter corresponding to a cumulative particle size distribution percentage of one sample reaching 90%) of 35 to 40 μm.
Through testing, the bonding strength between the aluminum alloy substrate 10 and the high-strength metal insert 20 provided by the embodiment of the utility model is greater than 80% of the strength of the aluminum alloy or the lower strength of the high-strength metal insert 20, that is, the aluminum alloy and the high-strength metal insert 20 can form a metal bond through diffusion, so that tight bonding is realized. In addition, the density of the aluminum alloy-based composite member is 3.0-6.0g/cm 3 In between, the higher the high-strength metal insert 20 is, the higher the density is, and the lower the high-strength metal insert 20 is, the lower the density is, determined by the ratio of the high-strength metal insert 20 and the aluminum alloy base 10 portion in the aluminum alloy-based composite structural member.
Further, the aluminum alloy-based composite member provided in the above embodiments of the present utility model can be applied to various parts requiring light weight, high strength and high wear resistance, and in some embodiments of the present utility model, the aluminum alloy-based composite member includes but is not limited to a hinge, a gear, a rotating shaft, a friction pair, or the like. Specifically, in some embodiments of the present utility model the aluminum alloy-based composite member is a hinge and the high strength metal insert 20 is a hinge mount of the hinge; or in some embodiments of the utility model the aluminum alloy matrix composite member is a gear and the high strength metal insert 20 is a tooth portion of the gear; or in some embodiments of the utility model the aluminum alloy matrix composite component is a shaft and the high strength metal insert 20 is the joint of the shaft; or in some embodiments of the utility model the aluminum alloy matrix composite member is a friction pair, and a side of the high strength metal insert 20 forms a friction surface of the friction pair.
In some embodiments of the present utility model, the aluminum alloy matrix composite member includes two oppositely disposed mounting portions including at least a portion of the high strength metal insert 20. The mounting firmness of the mounting portion can be improved by the two oppositely arranged mounting portions, and the mounting portion comprises at least part of the high-strength metal insert 20, so that the requirements of light weight, high strength and high wear resistance are met, and meanwhile, the cost is reduced.
Specifically, in some embodiments of the present utility model, the mounting portion may be provided in a ring shape, the high-strength insert 20 constituting a portion of the mounting portion, and the remaining portion of the mounting portion being constituted by the aluminum alloy base 10. By forming a part of the annular mounting portion from the high-strength insert 20 and the other part from the aluminum alloy base 10, it is possible to reduce the cost while ensuring that the requirements for light weight, high strength and high wear resistance are satisfied. The present utility model does not limit the ratio of the high-strength insert 20 in the annular mounting portion, and may be one quarter ring, one third ring, one half ring, three quarters ring, or four fifths ring of the annular mounting portion, or may adjust the ratio of the high-strength insert 20 in the annular mounting portion according to actual use requirements.
The following list some specific examples provided by the utility model and comparative examples of the constituent materials and tensile property tests of the aluminum alloy-based composite member were as follows:
example 1: the structure of the aluminum alloy-based composite member is shown in fig. 2 and 3, the high-strength metal insert is made of 17-4 stainless steel, and the aluminum alloy in the aluminum alloy matrix (metal powder injection molding) is aluminum-silicon alloy;
example 2: the structure of the aluminum alloy-based composite member is shown in FIG. 4, the high-strength metal insert is made of 17-4 stainless steel, and the aluminum alloy in the aluminum alloy matrix (metal powder injection molding) is 6063 aluminum alloy;
example 3: the structure of the aluminum alloy-based composite member is shown in fig. 5, the high-strength metal insert (metal powder injection molding) is made of 17-4 stainless steel, the aluminum alloy in the aluminum alloy insert (stamping molding) is 7050 aluminum alloy, and the aluminum alloy in the aluminum alloy connecting piece (metal powder injection molding) is 7050 aluminum alloy;
example 4: the structure of the aluminum alloy-based composite member is shown in fig. 2 and 3, the high-strength metal insert is made of TC4 titanium alloy, and the aluminum alloy in the aluminum alloy matrix (metal powder injection molding) is aluminum-silicon alloy;
example 5: the structure of the aluminum alloy-based composite member is shown in fig. 4, the high-strength metal insert is made of TC4 titanium alloy, and the aluminum alloy in the aluminum alloy matrix (metal powder injection molding) is 6063 aluminum alloy;
example 6: as shown in fig. 5, the structure of the aluminum alloy-based composite member is that the high-strength metal insert (metal powder injection molding) is made of TC4 titanium alloy, the aluminum alloy in the aluminum alloy insert (stamping molding) is 7050 aluminum alloy, and the aluminum alloy in the aluminum alloy connecting piece (metal powder injection molding) is 7050 aluminum alloy;
comparative example 1:17-4 stainless steel coupon (metal powder injection molding);
comparative example 2: TC4 titanium alloy coupon (metal powder injection molding).
Tensile properties were tested according to GB/T228.1-2010 and the test results are shown in Table 2 below.
TABLE 2 Performance index of inventive and comparative examples
As is clear from table 1, the strength of the high-strength metal insert is higher than that of the aluminum alloy matrix, so the bearing capacity of the high-strength metal insert is higher, the wear resistance when the surface of the high-strength metal insert is rubbed is higher than that when the surface of the aluminum alloy matrix is rubbed, the density of the aluminum alloy matrix composite material is smaller than that of the stainless steel sample or the titanium alloy sample, and the prepared aluminum alloy matrix composite member has the advantages of high strength, light weight and high wear resistance at the same time. Although the density of the aluminum alloy-based composite member prepared in example 3 was higher than that of the titanium alloy test sample, the titanium alloy was costly, and in a product of low cost, the aluminum alloy-based composite member can be prepared by compounding aluminum steel with a density similar to that of the titanium alloy, while satisfying the requirements of low cost, high strength, light weight and high wear resistance.
The present utility model also proposes an electronic device comprising an aluminum alloy-based composite member, the structure of which refers to the above-described embodiment. It can be understood that, because the electronic device provided by the utility model adopts all the embodiments of the aluminum alloy-based composite member, at least the electronic device has all the beneficial effects brought by the embodiments, and the details are not repeated here.
Further, electronic equipment is glasses, glasses include mirror leg, picture frame and pivot subassembly, the mirror leg pass through pivot subassembly rotate connect in the picture frame, the pivot subassembly includes aluminum alloy base composite member, aluminum alloy base composite member is located the accommodation space that picture frame and mirror leg constitute. The high strength and the high wear resistance of the glasses can be ensured while the light weight is ensured.
In some embodiments, as shown in fig. 2, the aluminum alloy-based composite member includes two oppositely disposed high strength metal inserts, the projections of the two high strength metal inserts in a predetermined direction at least partially overlapping. For example, the predetermined direction may be perpendicular to the extending direction of the temple, and in this case, the projections of the two high-strength metal inserts perpendicular to the extending direction of the temple may also overlap completely.
In addition, as shown in fig. 6, the projections of the two high-strength metal inserts 20 in other predetermined directions are at least partially overlapped, for example, the rotating shaft assembly includes a rotating shaft, and two ends of the rotating shaft are respectively mounted on the two high-strength metal inserts 20.
By at least partially overlapping the projections of the two high-strength metal inserts 20 in the predetermined direction, the mounting stability of the glasses can be further improved, and the wear resistance of the glasses can be improved.
In some embodiments, the electronic device may also be a head-mounted display device, in which case the aluminum alloy-based composite member may be disposed at a flip structure between a host of the head-mounted display device and a head band, wherein the host is used to present a picture to a user, and the head band is used to secure the head-mounted display device to the head of the user.
It should be noted that the electronic device may be a computer, a folding mobile phone, or other reversible electronic devices, and the aluminum alloy-based composite member may be a turnover component on the electronic device, for example, a rotation shaft component, for example, the rotation shaft component includes a rotation shaft, and the high-strength metal insert 20 is a joint of the rotation shaft and is used for providing wear resistance for rotation between the rotation shaft and the rotation shaft mounting portion.
The foregoing description is only of the preferred embodiments of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structural changes made by the specification and drawings of the present utility model or direct/indirect application in other related technical fields are included in the scope of the present utility model.
Claims (12)
1. An aluminum alloy-based composite member, characterized in that the aluminum alloy-based composite member comprises:
an aluminum alloy substrate; the method comprises the steps of,
at least one high-strength metal insert connected with the aluminum alloy matrix and serving as a bearing portion and/or friction portion of the aluminum alloy-based composite member, the high-strength metal insert having a strength higher than that of the aluminum alloy matrix.
2. The aluminum alloy-based composite component of claim 1, wherein the high strength metal insert has a strength greater than 900MPa and a vickers hardness greater than 350HV; and/or the number of the groups of groups,
the strength of the aluminum alloy in the aluminum alloy matrix is greater than 200MPa; and/or the number of the groups of groups,
the aluminum alloy matrix comprises an aluminum alloy insert and an aluminum alloy connecting piece.
3. The aluminum alloy-based composite component of claim 1, wherein the material of the high strength metal insert comprises steel and/or a titanium alloy.
4. The aluminum alloy-based composite component according to claim 3, wherein,
the high-strength metal insert is made of steel, wherein the steel comprises any one of Mn13 high manganese steel, 17-4PH alloy stainless steel and GCr15 steel; and/or the number of the groups of groups,
the high-strength metal insert is made of titanium alloy, wherein the titanium alloy comprises any one of TC4 titanium alloy, TC10 titanium alloy, TC3 titanium alloy and TA7 titanium alloy.
5. The aluminum alloy-based composite component of claim 1, wherein the aluminum alloy-based composite component is a hinge, a gear, a shaft, or a friction pair.
6. The aluminum alloy-based composite component according to claim 5, wherein,
the aluminum alloy-based composite member is a hinge, and the high-strength metal insert is a hinge mounting part of the hinge; or alternatively, the first and second heat exchangers may be,
the aluminum alloy-based composite member is a gear, and the high-strength metal insert is a gear tooth part of the gear; or alternatively, the first and second heat exchangers may be,
the aluminum alloy-based composite member is a rotating shaft, and the high-strength metal insert is a joint of the rotating shaft; or alternatively, the first and second heat exchangers may be,
the aluminum alloy-based composite member is a friction pair, and one side surface of the high-strength metal insert forms a friction surface of the friction pair.
7. The aluminum alloy-based composite component of any one of claims 1-6, wherein the aluminum alloy-based composite component comprises two oppositely disposed mounting portions, at least a portion of the mounting portions comprising a high strength metal insert.
8. The aluminum alloy-based composite component as recited in claim 7, wherein the mounting portion is provided in a ring shape, the high-strength insert forms part of the mounting portion, and a remaining part of the mounting portion is formed of the aluminum alloy matrix.
9. An electronic device comprising the aluminum alloy-based composite member as recited in any one of claims 1 to 8.
10. The electronic device of claim 9, wherein the electronic device is a pair of eyeglasses, the eyeglasses comprise an eyeglass leg, an eyeglass frame and a rotating shaft assembly, the eyeglass leg is rotatably connected to the eyeglass frame through the rotating shaft assembly, the rotating shaft assembly comprises the aluminum alloy-based composite member, and the aluminum alloy-based composite member is located in a containing space formed by the eyeglass frame and the eyeglass leg.
11. The electronic device of claim 10, wherein the aluminum alloy-based composite member includes two oppositely disposed high strength metal inserts, projections of the two high strength metal inserts in a predetermined direction at least partially overlapping.
12. The electronic device of claim 9, wherein the electronic device is a head-mounted display device, the aluminum alloy-based composite member being disposed at a flip structure between a host of the head-mounted display device and a headband.
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