Composite workpiece and terminal equipment

Abstract

The embodiment of the utility model provides a composite workpiece and terminal equipment. The composite part comprises a first structural part, a second structural part, a first material body and a second material body, the second structural part and the first structural part are made of different materials, the second structural part is located on the surface of one side of the first structural part, the first material body and the first structural part are made of the same material, and the first material body is connected with the surface of one side of the first structural part. The second material body and the second structural part are made of the same material, the second material body is connected with the second structural part, the joint face of the second material body and the second structural part intersects with the surface of one side of the first structural part, and the orthographic projection of the second material body and the orthographic projection of the first material body on the surface of one side of the first structural part are overlapped. According to the technical scheme, the reliability of connection between the dissimilar material structural parts can be improved.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of mechanical manufacturing technology, and in particular to a composite component and a terminal device. Background Art

[0002] In the field of mechanical manufacturing, it is often necessary to connect two structural parts made of different materials so that the product has the advantages of both materials. However, due to the differences in thermal conductivity and linear expansion coefficient of dissimilar materials, the connection between the two structural parts is relatively weak, which affects the structural reliability and service life of the product. Utility Model Content

[0003] The embodiments of the present application provide a composite component and a terminal device to improve the reliability of the connection between structural components made of different materials.

[0004] According to one aspect of the present application, a composite component is provided, including a first structural component, a second structural component, a first material body and a second material body, wherein the second structural component and the first structural component are made of different materials, the second structural component is located on a side surface of the first structural component, the first material body and the first structural component are made of the same material, the first material body is connected to a side surface of the first structural component, the second material body and the second structural component are made of the same material, the second material body is connected to the second structural component, and a joint surface between the second material body and the second structural component intersects with a side surface of the first structural component, and the orthographic projections of the second material body and the first material body on a side surface of the first structural component overlap.

[0005] According to the composite component of the embodiment of the present application, the first material body and the first structural member are connected by the same material, and the second material body and the second structural member are connected by the same material, and there is no direct connection between the structures made of different materials, so that the influence of the difference in material properties of different materials on the connection reliability can be reduced or even eliminated. In addition, since the orthographic projections of the second material body and the first material body on the side surface of the first structural member overlap, the second material body and the first material body can limit each other in a direction perpendicular to the side surface of the first structural member, which is conducive to improving the shear strength of the composite component, thereby further improving the reliability of the connection between the first structural member and the second structural member. Therefore, the design of the composite component of the embodiment of the present application can improve the reliability of the connection between the structural members of different materials, which is conducive to extending the service life of the composite component.

[0006] In some embodiments, the first material body is welded or integrally connected to a side surface of the first structural member; and / or the second material body is welded or integrally connected to the second structural member. The first material body and the first structural member made of the same material can be reliably connected together because there is no difference in material characteristics. Similarly, the second material body and the second structural member made of the same material can be reliably connected together because there is no difference in material characteristics.

[0007] In some embodiments, the first structural member is a titanium or titanium alloy structural member; and / or the second structural member is a steel structural member. In some examples, the titanium or titanium alloy structural member is connected to the steel structural member, and the resulting composite member can have the respective advantages of both materials.

[0008] In some embodiments, the second structural member has a groove, and the first material body and the second material body are located at the bottom of the groove. In this way, the first material body and the second material body will not protrude from the second structural member, so that the surface of the second structural member is relatively flat and it is easier to fit and assemble with other structural members.

[0009] In some embodiments, the second structural member has a through hole, and the first material body and the second material body are located in the through hole. By designing the through hole structure in the second structural member and arranging the first material body and the second material body in the through hole, on the one hand, the first material body and the second material body can have a larger overlap ratio in the direction perpendicular to the surface of one side of the first structural member, for example, they can overlap completely, which can further improve the shear strength of the composite product. On the other hand, the second material body can be more fully connected to the hole wall of the through hole, for example, 360° surrounding connection, so that the bonding area is larger, which is conducive to further improving the reliability of the connection between the first structural member and the second structural member.

[0010] In some embodiments, the composite part further includes a first diffusion welding intermediate layer, wherein the first material body, the first diffusion welding intermediate layer and the second material body are stacked in sequence along a direction away from the side surface of the first structural member; the first material body is welded to the side surface of the first structural member; the second material body and the first material body are welded through the first diffusion welding intermediate layer; and the second material body is welded to the hole wall of the through hole. In these embodiments, the first diffusion welding intermediate layer is sandwiched between the first material body and the second material body made of different materials, and can play a buffering role between the two, balance the stress generated by the different thermal expansion coefficients between the two materials, and adjust the compatibility between the two materials. In addition, the first diffusion welding intermediate layer can also provide necessary reactants, thereby increasing the diffusion reaction rate and improving the welding efficiency.

[0011] In some embodiments, the first material body is T-shaped, and the first material body is integrally connected with the first structural member to form an I-shaped structure; the second material body has a T-shaped groove embedded with the first material body, and the second material body is welded to the hole wall of the through hole. In this embodiment, on the one hand, there is no direct connection between the structures of different materials, which can reduce or even eliminate the influence of the difference in material properties of different materials on the connection reliability; on the other hand, based on the shape design of the first material body and the second material body, it is conducive to improving the shear strength of the composite component, thereby further improving the reliability of the connection between the first structural member and the second structural member; on the other hand, the first material body is integrally connected with the first structural member, and the second material body is embedded and assembled with the first material body, which can reduce the welding process and simplify the production process, thereby helping to improve the production efficiency of the composite component.

[0012] In some embodiments, the first material body is T-shaped, and the first material body is integrally connected with the first structural member to form an I-shaped structure; the second material body includes two L-shaped inserts, and the two L-shaped inserts are respectively engaged with the two side grooves of the I-shaped structure, and the two L-shaped inserts are welded to the hole wall of the through hole. In this embodiment, on the one hand, there is no direct connection between the structures of different materials, which can reduce or even eliminate the influence of the difference in material properties of different materials on the connection reliability; on the other hand, the shape design based on the first material body and the second material body is conducive to improving the shear strength of the composite component, thereby further improving the reliability of the connection between the first structural member and the second structural member; on the other hand, the first material body is integrally connected with the first structural member, and the second material body is engaged and assembled with the first material body, which can reduce the welding process and simplify the production process, thereby helping to improve the production efficiency of the composite component.

[0013] In some embodiments, two L-shaped inserts are arranged relative to each other along a first direction, and a side of the first material body facing away from the first structural member has a mounting groove penetrating therethrough along a second direction, wherein the first direction and the second direction intersect and are both parallel to a side surface of the first structural member; the composite component also includes a composite connector fixed to the mounting groove, and the composite connector includes a first material layer, a second diffusion welding intermediate layer, and a second material layer stacked in sequence, wherein the first material layer is made of the same material as the first structural member and is welded to the bottom of the mounting groove, the second material layer and the first material layer are welded through the second diffusion welding intermediate layer, and the second material layer is made of the same material as the second structural member and is welded to the hole wall of the through hole. In these embodiments, the second material body forms two welds with the hole wall of the through hole, and the second material layer forms two welds with the hole wall of the through hole, and the four welds can be roughly distributed in a cross-shaped manner, and the mutual positioning of the second material body and the first material body can make the connection between the first structural member and the second structural member more reliable.

[0014] In some embodiments, the first material body includes a columnar protrusion and a flange, wherein the columnar protrusion is integrally connected to the first structural member, and the flange is welded to the end of the columnar protrusion away from the first structural member; the second material body surrounds the columnar protrusion, and the second material body is integrally connected to the second structural member to form a stepped hole that matches the shape of the first material body. In this embodiment, on the one hand, there is no direct joint connection between structures of different materials, which can reduce or even eliminate the influence of the difference in material properties of dissimilar materials on the connection reliability; on the other hand, based on the shape design of the first material body and the second material body, it is beneficial to improve the shear strength of the composite component, thereby further improving the reliability of the connection between the first structural member and the second structural member; on the other hand, the second material body is integrally connected to the second structural member, which can reduce the welding process and simplify the production process, thereby helping to improve the production efficiency of the composite component.

[0015] According to one aspect of the present application, a terminal device is provided, comprising a composite component of any of the above embodiments, wherein the first structural component is a shell of the terminal device; and the second structural component is located on the inner surface of the shell and connected to the shell. The composite component combines the advantages of two materials, which is conducive to realizing a lightweight design of the shell, and can meet the design requirements of structural strength, and has a long service life.

[0016] In some embodiments, the terminal device is a foldable display device, the foldable display device includes a folding bending area, and the second structural member is located in the folding bending area. The second structural member can be, for example, a related part of a folding hinge mechanism of the foldable display device, which needs to be reliably connected to the housing. The second structural member can play a structural reinforcement role for the housing, and can also play a supporting role for the foldable display screen in the folding bending area. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1A is a schematic diagram of a three-dimensional structure of a composite product according to some embodiments of the present application;

[0018] Figure 1B It is a schematic diagram of a top view of a composite component according to some embodiments of the present application;

[0019] Figure 1C For composite parts according to some embodiments of the present application Figure 1B Schematic diagram of the cross-sectional structure cut along the AA direction;

[0020] Figure 1D According to some embodiments of the present application, Figure 1C A schematic diagram of some process steps for the composite part shown;

[0021] Figure 2A is a schematic diagram of a three-dimensional structure of a composite product according to some embodiments of the present application;

[0022] Figure 2B It is a schematic diagram of a top view of a composite component according to some embodiments of the present application;

[0023] Figure 2C For composite parts according to some embodiments of the present application Figure 2B A schematic diagram of the cross-sectional structure cut along the BB direction;

[0024] Figure 2D According to some embodiments of the present application, Figure 2C A schematic diagram of some process steps for the composite part shown;

[0025] Figure 3A is a schematic diagram of a three-dimensional structure of a composite product according to some embodiments of the present application;

[0026] Figure 3B It is a schematic diagram of a top view of a composite component according to some embodiments of the present application;

[0027] Figure 3C For composite parts according to some embodiments of the present application Figure 3B Schematic diagram of the cross-sectional structure cut along the CC direction;

[0028] Figure 4A is a schematic diagram of a three-dimensional structure of a composite product according to some embodiments of the present application;

[0029] Figure 4B It is a schematic diagram of a top view of a composite component according to some embodiments of the present application;

[0030] Figure 4C For composite parts according to some embodiments of the present application Figure 4B Schematic diagram of the cross-sectional structure cut along the DD direction;

[0031] Figure 4D According to some embodiments of the present application, Figure 4C A schematic diagram of some process steps for the composite part shown;

[0032] Figure 5A is a schematic diagram of a three-dimensional structure of a composite product according to some embodiments of the present application;

[0033] Figure 5B It is a schematic diagram of a top view of a composite component according to some embodiments of the present application;

[0034] Figure 5C For composite parts according to some embodiments of the present application Figure 5B Schematic diagram of the cross-sectional structure cut along the EE direction;

[0035] Figure 5D According to some embodiments of the present application, Figure 5C A schematic diagram of some process steps for the composite part shown;

[0036] Figure 6 It is a schematic diagram of the structure of a terminal device according to some embodiments of the present application.

[0037] Reference numerals:

[0038] 100-composite part; 10-first structural part; 20-second structural part; 30-first material body; 40-second material body;

[0039] 101 - one side surface of the first structural member; 24 - the joint surface between the second material body and the second structural member; 201 - groove; 202 - through hole;

[0040] 34-first diffusion welding intermediate layer; 41-T-shaped groove; 42-L-shaped insert; 31-mounting groove; 50-composite connecting piece; 501-first material layer;

[0041] 502-second diffusion welding intermediate layer; 503-second material layer; 32-columnar protrusion; 33-flange; 43-step hole; 600-terminal device;

[0042] 61 - housing; 601 - folding and bending area; 62 - foldable display screen; D1 - first direction; D2 - second direction. DETAILED DESCRIPTION

[0043] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings.

[0044] The terms used in the following embodiments are only for the purpose of describing specific embodiments and are not intended to be limiting of the present application. As used in the specification and appended claims of the present application, the singular expressions "a", "an", "said", "above", "the" and "this" are intended to also include expressions such as "one or more", unless there is a clear contrary indication in the context.

[0045] References to "one embodiment" or "a specific embodiment" in this specification mean that one or more embodiments of the present application include a particular feature, structure or characteristic described in conjunction with the embodiment. The terms "include", "comprises", "has" and their variations all mean "including but not limited to", unless otherwise specifically emphasized.

[0046] In the field of mechanical manufacturing, it is often necessary to connect two structural parts of different materials so that the product parts have the material advantages of both. Taking the connection between titanium or titanium alloy structural parts (which can be understood as titanium structural parts or titanium alloy structural parts in this article) and steel structural parts as an example, titanium has the characteristics of good corrosion resistance, high strength, and light weight, titanium alloy has the characteristics of good corrosion resistance, high strength, and good toughness, while steel has the characteristics of high strength, good wear resistance, easy processing, and low cost. By welding titanium or titanium alloy structural parts with steel structural parts, the product parts can have the material advantages of both. However, due to the large difference in thermal conductivity and linear expansion coefficient between titanium or titanium alloy materials and steel materials, a large amount of intermetallic compounds (IMC) are generated at the welding point of the two structural parts, and the bonding (in this article, "bonding" can be understood as connecting and putting together so that it is not easy to separate) of the two structural parts is relatively weak, thereby affecting the structural reliability and service life of the product parts.

[0047] How to improve the reliability of connections between structural parts made of dissimilar materials has always been a technical problem that has troubled technicians in this field.

[0048] In view of this, an embodiment of the present application provides a composite component and a terminal device. The design of the composite component can improve the reliability of the connection between structural components of different materials. When the composite component is applied to the terminal device, the design of the composite component is also beneficial to improving the structural reliability of the terminal device.

[0049] The embodiments of the present application do not limit the specific application scenarios of the composite component. In some embodiments, the composite component can be applied to terminal devices such as a straight-type mobile phone, a straight-type tablet computer, a foldable mobile phone, a foldable tablet computer, a laptop computer, or a foldable wearable device.

[0050] The embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0051] like Figure 1A , Figure 1B and Figure 1C As shown, Figure 1A Schematic diagram of the three-dimensional structure of the composite product 100 of some embodiments of the present application. Figure 1B Schematic diagram of the top view of the composite component 100 of some embodiments of the present application. Figure 1C For some embodiments of the present application, the composite parts are Figure 1B Schematic diagram of the cross-sectional structure cut along AA direction.

[0052] exist Figure 1A , Figure 1B and Figure 1CIn the illustrated embodiments, the composite member 100 includes a first structural member 10, a second structural member 20, a first material body 30, and a second material body 40. The first structural member 10 and the second structural member 20 are made of different materials, and the second structural member 20 is located on a side surface 101 of the first structural member 10. The first material body 30 and the first structural member 10 are made of the same material, and the first material body 30 is connected to a side surface 101 of the first structural member 10. The second material body 40 and the second structural member 20 are made of the same material, and the second material body 40 is connected to the second structural member 20, wherein the joint surface 24 between the second material body 40 and the second structural member 20 intersects with the side surface 101 of the first structural member 10, and the orthographic projections of the second material body 40 and the first material body 30 on the side surface 101 of the first structural member 10 overlap.

[0053] In the embodiment of the present application, the "joining surface" of the two structures can be understood as a transition surface that connects and combines the two structures. The joining surface 24 between the second material body 40 and the second structural member 20 intersects with a side surface 101 of the first structural member 10, for example, it can be orthogonal or at a non-90-degree angle. "The orthographic projections of the second material body 40 and the first material body 30 on the side surface 101 of the first structural member 10 overlap", which can be understood as the orthographic projections of the two on the side surface 101 of the first structural member 10 have overlapping parts, for example, they can completely overlap (such as Figure 1C ) or do not completely overlap.

[0054] In the embodiments of the present application, the specific material types of the first structural member 10, the second structural member 20, the first material body 30 and the second material body 40 are not limited. For example, in some embodiments, the first structural member 10 is a titanium or titanium alloy structural member. When the first structural member 10 is a titanium structural member, its main material is titanium. When the first structural member 10 is a titanium alloy structural member, its main material is titanium alloy. The first material body 30 is the same material as the first structural member 10. For example, in some embodiments, the second structural member 20 is a steel structural member, and its main material is steel. The second material body 40 is the same material as the second structural member 20, and its main material is also steel. As described above, titanium has the characteristics of good corrosion resistance, high strength, and light weight, titanium alloy has the characteristics of good corrosion resistance, high strength, and good toughness, and steel has the characteristics of high strength, good wear resistance, easy processing, and low cost. In some embodiments of the present application, titanium or titanium alloy structural members are connected with steel structural members, and the resulting composite member 100 can have the respective advantages of both materials.

[0055] According to different application scenarios, in other embodiments of the present application, the first structural member 10 and the second structural member 20 may also adopt other material combinations different from the combination of titanium or titanium alloy and steel. For example, in some embodiments, the main material of the first structural member 10 and the first material body 30 is space aluminum, and the main material of the second structural member 20 and the second material body 40 is steel. The material combinations of more embodiments are not listed here one by one.

[0056] In the embodiments of the present application, there is no limitation on the respective molding processes of the first structural member 10 and the second structural member 20. For example, in some embodiments, the first structural member 10 is a titanium or titanium alloy structural member, which can be formed by at least one of rolling, stretching, or extrusion. In some embodiments, the second structural member 20 is a steel structural member, which can be formed by metal injection molding (MIM) process. The process principle of MIM is to mix metal powder into a specific injection molding material, and then inject it into a mold through an injection molding machine to form the desired surface shape of the part. In this process, the metal powder is subjected to heat and pressure to form a uniform metal element, and is solidified through heat treatment and cooling steps to finally obtain the desired metal part.

[0057] In the embodiment of the present application, there is no limitation on the specific connection method between the first material body 30 and the first structural member 10, and between the second material body 40 and the second structural member 20. For example, the first material body 30 and the side surface 101 of the first structural member 10 may be welded or integrally connected, and the second material body 40 and the second structural member 20 may be welded or integrally connected.

[0058] like Figure 1C As shown, in these embodiments, the first material body 30 is welded to the first structural member 10, and the second material body 40 is welded to the second structural member 20. Welding generally refers to two or more materials of the same or different types being connected into one through the combination and diffusion between atoms or molecules. Compared with other mechanical connection methods, welding has the advantages of simple structure, high connection strength, good density, high productivity, and low cost.

[0059] In some embodiments of the present application, the first material body 30 and the side surface 101 of the first structural member 10 may also be integrally connected, that is, the first material body 30 and the first structural member 10 are designed as an integral structure, and there is no need to assemble the two, and they can be integrally formed by mechanical processing. Similarly, the second material body 40 and the second structural member 20 may also be integrally connected, so that the second material body 40 and the second structural member 20 are designed as an integral structure, and there is no need to assemble the two, and they can be integrally formed by mechanical processing.

[0060] According to the composite component 100 of the embodiment of the present application, the first material body 30 and the first structural member 10 made of the same material are connected (such as welding or integral connection), and the second material body 40 and the second structural member 20 made of the same material are connected (such as welding or integral connection), and there is no direct joint connection between the structures made of different materials (for example, there is no direct joint connection between the first structural member 10 and the second structural member 20, and between the first material body 30 and the second material body 40). In this way, the influence of the difference in material properties of dissimilar materials (such as the difference in thermal conductivity and linear expansion coefficient, etc.) on the connection reliability can be reduced or even eliminated. In addition, since the orthographic projections of the second material body 40 and the first material body 30 on the side surface 101 of the first structural member 10 overlap, the second material body 40 and the first material body 30 can limit each other in a direction perpendicular to the side surface 101 of the first structural member 10, which is beneficial to improving the shear strength of the composite member 100 (the direction of the shear force is orthogonal to the side surface 101 of the first structural member 10), thereby further improving the reliability of the connection between the first structural member 10 and the second structural member 20.

[0061] Therefore, the design of the composite component 100 in the embodiment of the present application can improve the reliability of the connection between structural components made of different materials, which is beneficial to extending the service life of the composite component 100 and the terminal device including the composite component 100.

[0062] Based on the above design concept, the embodiment of the present application does not limit the specific structural form of the composite component 100, and the composite component 100 can be designed into various structural forms according to the usage scenario of the composite component 100.

[0063] like Figure 1A , Figure 1B and Figure 1C As shown, in some embodiments of the present application, the second structural member 20 may be designed with a groove 201, and the first material body 30 and the second material body 40 may be located at the bottom of the groove 201. In this way, the first material body 30 and the second material body 40 will not protrude from the second structural member 20, so that the surface of the second structural member 20 is relatively flat, and it is easier to achieve fitting and assembly with other structural members.

[0064] In some embodiments, the composite product 100 can be applied to a foldable terminal device, which includes but is not limited to a foldable mobile phone, a foldable tablet computer, or a laptop computer, wherein the first structural member 10 of the composite product 100 can be used as a shell of the foldable terminal device, and the second structural member 20 of the composite product 100 can be located in a folding and bending area of ​​the shell, thereby structurally reinforcing the shell and providing structural support for other components such as display screens.

[0065] Continue to refer to Figure 1CAs shown, in these embodiments, the second structural member 20 has a through hole 202, and the through hole 202 can be located at the bottom of the groove 201. The first material body 30 and the second material body 40 are located in the through hole 202, and the second material body 40 is welded to the hole wall of the through hole 202, so that the joint surface 24 of the second material body 40 and the second structural member 20 intersects with the side surface 101 of the first structural member 10. The structure of the through hole 202 is designed in the second structural member 20, and the first material body 30 and the second material body 40 are arranged in the through hole 202. On the one hand, the overlap ratio of the first material body 30 and the second material body 40 in the direction perpendicular to the side surface 101 of the first structural member 10 can be larger, for example, they can be completely overlapped, so that the shear strength of the composite product 100 can be further improved. On the other hand, the second material body 40 can be more fully connected to the hole wall of the through hole 202, for example, 360° surrounding connection, so that the joint area is larger, which is conducive to further improving the reliability of the connection between the first structural member 10 and the second structural member 20.

[0066] In some other embodiments of the present application (these embodiments are not illustrated in the drawings), the second structural member 20 may not be designed with the above-mentioned through hole 202, but a through groove is provided on its peripheral surface, and the through groove extends perpendicularly to the one side surface 101 of the first structural member 10, and the first material body 30 and the second material body 40 are arranged in the through groove. In this way, the overlapping ratio of the first material body 30 and the second material body 40 in the direction perpendicular to the one side surface 101 of the first structural member 10 is also relatively large, for example, they can be completely overlapped, and a part of the surface of the second material body 40 can be connected to the groove wall of the through groove.

[0067] Continue to refer to Figure 1C As shown, in these embodiments, the composite component 100 may further include a first diffusion welding intermediate layer 34, wherein the first material body 30, the first diffusion welding intermediate layer 34 and the second material body 40 are stacked in sequence along a direction away from the side surface 101 of the first structural member 10, the first material body 30 is welded to the side surface 101 of the first structural member 10, the second material body 40 is welded to the first material body 30 through the first diffusion welding intermediate layer 34, and the second material body 40 is welded to the hole wall of the through hole 202 of the second structural member 20.

[0068] In these embodiments, the second material body 40 and the first material body 30 are indirectly welded by a diffusion welding process. The principle of diffusion welding is to diffuse and mix the surfaces of two materials at high temperature to achieve welding. The first diffusion welding intermediate layer 34 is sandwiched between the first material body 30 and the second material body 40 made of different materials, and can play a buffering role between the two, balance the stress generated by the different thermal expansion coefficients between the two materials, and adjust the compatibility between the two materials. In addition, the first diffusion welding intermediate layer 34 can also provide necessary reactants, thereby increasing the diffusion reaction rate and improving the welding efficiency. The specific material type and structural form of the first diffusion welding intermediate layer 34 are not limited. For example, it can include one or more metal materials and can be a single-layer structure or a composite layer structure.

[0069] like Figure 1D As shown, it is made for some embodiments of the present application Figure 1C The schematic diagram of some process steps of the composite component 100 shown in the figure shows that when the composite component 100 is produced, the second material body 40 and the first material body 30 can be first welded through the first diffusion welding intermediate layer 34, and then the first material body 30 can be welded to the side surface 101 of the first structural component 10, and then the second material body 40 can be welded to the hole wall of the through hole 202 of the second structural component 20.

[0070] In some embodiments of the present application, Figure 1C The composite component 100 shown in the figure has a first structural component 10 and a first material body 30 whose main materials are titanium, and a second structural component 20 and a second material body 40 whose main materials are steel. The composite component 100 can be manufactured by the following method steps:

[0071] First, a titanium plate substrate, a steel plate substrate and a diffusion welding intermediate layer substrate are provided, wherein the material of the diffusion welding intermediate layer substrate may include at least one of copper, vanadium, or niobium;

[0072] Then, the titanium plate substrate, the diffusion welding intermediate layer substrate and the steel plate substrate are stacked in sequence, and diffusion welding is performed on the stacked structure at a certain temperature and pressure to composite the titanium plate substrate and the steel plate substrate together;

[0073] Then, the composite structure manufactured in the above steps is cut into a plurality of convex blocks of preset shapes and sizes, such as Figure 1D As shown in Figure (a1), the structure of each bump includes a first material body 30, a first diffusion soldering intermediate layer 34 and a second material body 40;

[0074] Then, if Figure 1DAs shown in Figure (a2), the bump is positioned on the side surface 101 of the first structural member 10, and the first material body 30 is welded to the side surface 101 of the first structural member 10. Welding can be laser welding, which is an efficient and precise welding method that uses a high-energy-density laser beam as a heat source, and has the advantages of small heat input, small metallographic change range of the heat-affected zone, and small heat conduction deformation. The power of the laser welding equipment can be set to 200 to 500W, the welding speed can be set to 20mm / s, and the flow rate of the shielding gas can be set to 20L / min;

[0075] Then, if Figure 1D As shown in Figure (a3), the second structural member 20 is placed on a side surface 101 of the first structural member 10, and its through hole 202 is aligned with the protrusion;

[0076] Then, if Figure 1D As shown in the middle (a4) figure, the second material body 40 is welded to the hole wall of the through hole 202, thereby forming a weld seam surrounding the second material body 40 (a weld seam refers to a seam-shaped metal body formed by melting and connecting the welding rod and the metal at the joint by the high temperature of the welding heat source. After the weld seam metal cools, the two welds are connected into a whole), that is, forming the joint surface 24 between the second material body 40 and the second structural member 20. The welding can be laser welding, the power of the laser welding equipment can be set to 300 to 1000W, the welding speed can be set to 50mm / s, and the flow rate of the shielding gas can be set to 20L / min. After the welding is completed, the overall structure of the composite product 100 is formed.

[0077] In other embodiments of the present application, Figure 2A , Figure 2B and Figure 2C As shown, Figure 2A Schematic diagram of the three-dimensional structure of the composite product 100 of some embodiments of the present application. Figure 2B Schematic diagram of the top view of the composite component 100 of some embodiments of the present application. Figure 2C For some embodiments of the present application, the composite parts are Figure 2B Schematic diagram of the cross-sectional structure cut along the BB direction.

[0078] exist Figure 2A , Figure 2B and Figure 2C In the embodiments shown, the structure of the composite component 100 can also be designed as follows: the second structural component 20 has a through hole 202, the first material body 30 and the second material body 40 are located in the through hole 202, wherein the first material body 30 is T-shaped, the first material body 30 is integrally connected with the first structural component 10 to form an I-shaped structure, the second material body 40 has a T-shaped groove 41 embedded with the first material body 30, and the second material body 40 is welded to the hole wall of the through hole 202.

[0079] In this embodiment, on the one hand, there is no direct joint connection between structures of different materials, which can reduce or even eliminate the influence of the difference in material properties of dissimilar materials on the connection reliability; on the other hand, based on the shape design of the first material body 30 and the second material body 40, the second material body 40 and the first material body 30 can limit each other in a direction perpendicular to the side surface 101 of the first structural member 10, which is beneficial to improve the shear strength of the composite component 100, thereby further improving the reliability of the connection between the first structural member 10 and the second structural member 20; on the other hand, the first material body 30 is integrally connected to the first structural member 10, and the second material body 40 is embedded and assembled with the first material body 30, which can reduce the welding process and simplify the production process, thereby helping to improve the production efficiency of the composite component 100.

[0080] In some embodiments of the present application, Figure 2C In the composite component 100 shown in the figure, the main materials of the first structural member 10 and the first material body 30 are titanium, and the main materials of the second structural member 20 and the second material body 40 are steel. Figure 2D As shown, it is made for some embodiments of the present application Figure 2C The composite product 100 is a schematic diagram of some process steps. The composite product 100 can be manufactured by the following method steps:

[0081] First, a second material body 40, a first structural member 10 and a first material body 30 (such as Figure 2D As shown in Figure (b1), and a second structural member 20;

[0082] Then, if Figure 2D As shown in Figure (b2), the second material body 40 is embedded and assembled with the first material body 30;

[0083] Then, if Figure 2D As shown in Figure (b3), the second structural member 20 is placed on a side surface 101 of the first structural member 10, and its through hole 202 is aligned with the protruding structure formed by the first material body 30 and the second material body 40;

[0084] Then, if Figure 2D As shown in the middle (b4), the second material body 40 is welded to the hole wall of the through hole 202, thereby forming a weld surrounding the second material body 40, that is, forming the joint surface 24 between the second material body 40 and the second structural member 20. The welding can be laser welding, the power of the laser welding equipment can be set to 300 to 1000W, the welding speed can be set to 50mm / s, and the flow rate of the shielding gas can be set to 20L / min. After the welding is completed, the overall structure of the composite product 100 is formed.

[0085] In other embodiments of the present application, Figure 3A , Figure 3B and Figure 3C As shown, Figure 3A Schematic diagram of the three-dimensional structure of the composite product 100 of some embodiments of the present application. Figure 3B Schematic diagram of the top view of the composite component 100 of some embodiments of the present application. Figure 3C The composite article 100 of some embodiments of the present application is Figure 3B Schematic diagram of the cross-sectional structure cut along CC direction.

[0086] like Figure 3A , Figure 3B and Figure 3C As shown, in these embodiments, the structure of the composite component 100 can also be designed as follows: the second structural member 20 has a through hole 202, the first material body 30 and the second material body 40 are located in the through hole 202, wherein the first material body 30 is T-shaped, the first material body 30 is integrally connected with the first structural member 10 to form an I-shaped structure, and the second material body 40 includes two L-shaped inserts 42, the two L-shaped inserts 42 are inserted into and engaged with the two side grooves of the I-shaped structure in a one-to-one correspondence, and the two L-shaped inserts 42 are respectively welded to the hole wall of the through hole 202. In some embodiments, in order to make the first material body 30 more evenly stressed, the two L-shaped inserts 42 can be arranged relatively along the first direction D1 shown in the figure, for example.

[0087] In this embodiment, on the one hand, there is no direct joint connection between structures of different materials, which can reduce or even eliminate the influence of the difference in material properties of dissimilar materials on the connection reliability; on the other hand, based on the shape design of the first material body 30 and the second material body 40, the second material body 40 and the first material body 30 can limit each other in a direction perpendicular to the side surface 101 of the first structural member 10, which is beneficial to improve the shear strength of the composite component 100, thereby further improving the reliability of the connection between the first structural member 10 and the second structural member 20; on the other hand, the first material body 30 is integrally connected to the first structural member 10, and the second material body 40 is embedded and assembled with the first material body 30, which can reduce the welding process and simplify the production process, thereby helping to improve the production efficiency of the composite component 100.

[0088] In other embodiments of the present application, Figure 4A , Figure 4B and Figure 4C As shown, Figure 4A Schematic diagram of the three-dimensional structure of the composite product 100 of some embodiments of the present application. Figure 4B Schematic diagram of the top view of the composite component 100 of some embodiments of the present application. Figure 4C For some embodiments of the present application, the composite parts are Figure 4BSchematic diagram of the cross-sectional structure cut along DD.

[0089] Figure 4A , Figure 4B and Figure 4C The embodiment shown in Figure 3A , Figure 3B and Figure 3C Further improvements have been made on the basis of the embodiment shown. Specifically, Figure 4B and Figure 4C As shown, a mounting groove 31 can be designed on a side of the first material body 30 facing away from the first structural member 10 and passing through the first material body 30 along the second direction D2, wherein the first direction D1 and the second direction D2 intersect and are both parallel to a side surface 101 of the first structural member 10 (at Figure 4C , the second direction D2 is not shown because it is perpendicular to the paper surface). The first direction D1 and the second direction D2 may be orthogonal or at other angles. In these embodiments, the composite component 100 may also include a composite connector 50 fixed to the mounting groove 31, the composite connector 50 including a first material layer 501, a second diffusion welding intermediate layer 502, and a second material layer 503 stacked in sequence, wherein the first material layer 501 is made of the same material as the first structural component 10, and the first material layer 501 is welded to the bottom of the mounting groove 31, the second material layer 503 is welded to the first material layer 501 through the second diffusion welding intermediate layer 502, the second material layer 503 is made of the same material as the second structural component 20, and the second material layer 503 is welded to the hole wall of the through hole 202. The process introduction and material and parameter selection of diffusion welding can refer to the aforementioned embodiments.

[0090] In these embodiments, the second material body 40 forms two welds with the hole wall of the through hole 202, the second material layer 503 forms two welds with the hole wall of the through hole 202, and the four welds can be roughly distributed in a cross pattern. Assisted by the mutual limitation of the second material body 40 and the first material body 30, the connection between the first structural member 10 and the second structural member 20 can be made more reliable.

[0091] In some embodiments of the present application, Figure 4C In the composite component 100 shown in the figure, the main materials of the first structural member 10 and the first material body 30 are titanium, and the main materials of the second structural member 20 and the second material body 40 are steel. Figure 4D As shown, it is made for some embodiments of the present application Figure 4C The composite article 100 is a schematic diagram of some process steps. The composite article 100 can be manufactured by the following method steps:

[0092] First, two L-shaped inserts 42, a first structural member 10 and a first material body 30 (such as a first material body 30) are provided in accordance with a pre-designed shape and size. Figure 4DAs shown in FIG. (c1), a composite connecting member 50 formed by diffusion welding (refer to the process description of diffusion welding in the above embodiment), and a second structural member 20;

[0093] Then, if Figure 4D As shown in the middle figure (c2), two L-shaped inserts 42 are correspondingly engaged with two side grooves of the I-shaped structure formed by integrally connecting the first material body 30 and the first structural member 10;

[0094] Then, if Figure 4D As shown in Figure (c3), the first material layer 501 of the composite connector 50 is welded to the bottom of the mounting groove 31, wherein the welding may be laser welding, the power of the laser welding equipment may be set to 200 to 500 W, the welding speed may be set to 20 mm / s, and the flow rate of the shielding gas may be set to 20 L / min;

[0095] Then, if Figure 4D As shown in Figure (c4), the second structural member 20 is placed on a side surface 101 of the first structural member 10, and its through hole 202 is aligned with the protruding structure formed by the first material body 30, the second material body 40 and the composite connecting member 50;

[0096] Then, if Figure 4D As shown in Figure (c5), the two L-shaped inserts 42 are respectively welded to the hole wall of the through hole 202 (to form two welds distributed along the first direction D1), and the second material layer 503 of the composite connector 50 is welded to the hole wall of the through hole 202 of the second structural member 20 (to form two welds distributed along the second direction D2). Welding can be laser welding, the power of the laser welding equipment can be set to 300 to 1000W, the welding speed can be set to 50mm / s, and the flow rate of the shielding gas can be set to 20L / min. After welding is completed, the overall structure of the composite component 100 is formed.

[0097] In other embodiments of the present application, Figure 5A , Figure 5B and Figure 5C As shown, Figure 5A Schematic diagram of the three-dimensional structure of the composite product 100 of some embodiments of the present application. Figure 5B Schematic diagram of the top view of the composite component 100 of some embodiments of the present application. Figure 5C For some embodiments of the present application, the composite parts are Figure 5B Schematic diagram of the cross-sectional structure cut along the EE direction.

[0098] like Figure 5A , Figure 5B and Figure 5CAs shown, in these embodiments, the structure of the composite part 100 can be designed as follows: the first material body 30 includes a columnar protrusion 32 and a flange 33, wherein the columnar protrusion 32 is integrally connected to the first structural member 10, and the flange 33 is welded to an end of the columnar protrusion 32 away from the first structural member 10, and the second material body 40 is located between the first structural member 10 and the flange 33 and surrounds the columnar protrusion 32, and the second material body 40 is integrally connected to the second structural member 20 to form a stepped hole 43 matching the shape of the first material body 30.

[0099] In this embodiment, on the one hand, there is no direct joint connection between structures of different materials, which can reduce or even eliminate the influence of the difference in material properties of dissimilar materials on the connection reliability; on the other hand, based on the shape design of the first material body 30 and the second material body 40, the second material body 40 and the first material body 30 can limit each other in a direction perpendicular to the surface of the first structural member 10, which is beneficial to improve the shear strength of the composite component 100, thereby further improving the reliability of the connection between the first structural member 10 and the second structural member 20; on the other hand, the second material body 40 is integrally connected to the second structural member 20, which can reduce the welding process and simplify the production process, thereby helping to improve the production efficiency of the composite component 100.

[0100] In this embodiment of the present application, the flange 33 may be in the form of a closed ring or a non-closed ring, and the embodiment of the present application does not limit its specific shape.

[0101] In some embodiments of the present application, Figure 5C In the composite component 100 shown in the figure, the main materials of the first structural member 10 and the first material body 30 are titanium, and the main materials of the second structural member 20 and the second material body 40 are steel. Figure 5D As shown, it is made for some embodiments of the present application Figure 5C The composite article 100 is a schematic diagram of some process steps. The composite article 100 can be manufactured by the following method steps:

[0102] First, provide a columnar protrusion 32 and a first structural member 10 (such as a cylindrical protrusion 32) integrally formed according to a pre-designed shape and size. Figure 5D As shown in the figure (d1), the flange 33, and the integrally formed second material body 40 and the second structural member 20;

[0103] Then, if Figure 5D As shown in the middle figure (d2), the second material body 40 and the second structural member 20 formed integrally are sleeved on the columnar protrusion 32 and the first structural member 10 formed integrally;

[0104] Then, if Figure 5DAs shown in Figure (d3), the flange 33 is put on the columnar protrusion 32 and welded to the columnar protrusion 32, wherein the welding can be laser welding, the power of the laser welding equipment can be set to 200 to 500W, the welding speed can be set to 20mm / s, and the flow rate of the shielding gas can be set to 20L / min.

[0105] like Figure 6 As shown, some embodiments of the present application further provide a terminal device 600, which includes the composite component 100 of any of the aforementioned embodiments, wherein the first structural component 10 is a shell 61 of the terminal device 600, and the second structural component 20 is located on the inner surface of the shell 61 and connected to the shell 61.

[0106] In some embodiments, the first structural member 10 may be a titanium or titanium alloy shell, the second structural member 20 may be a steel structural member, the first material body 30 may be made of the same material as the first structural member 10 , and the second material body 40 may be made of the same material as the second structural member 20 .

[0107] In some embodiments, the steel structure may be a steel structure layer laminated and connected to the titanium or titanium alloy shell; in other embodiments, the steel structure may also be various steel structure parts that need to be fixedly connected to the titanium or titanium alloy shell. In these embodiments, the titanium or titanium alloy shell is compositely connected to the steel structure, and the composite component 100 combines the advantages of the two materials, which can not only realize the lightweight design of the shell 61, but also meet the design requirements of structural strength.

[0108] Continue to refer to Figure 6 As shown, in some embodiments, the terminal device 600 may be a foldable display device, which includes a foldable bending area 601, wherein the second structural member 20 is located in the foldable bending area 601. The terminal device 600 may be, for example, a foldable mobile phone, a foldable tablet computer, or a laptop computer. In some embodiments, the foldable display device may include a foldable display screen 62, wherein the second structural member 20 may be, for example, a related part of a folding hinge mechanism of the foldable display device, which needs to be reliably connected to the housing 61, and the second structural member 20 may play a structural reinforcement role for the housing 61, and may also play a supporting role for the foldable display screen 62 in the foldable bending area 601.

[0109] The above are only specific implementations of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A composite part, characterized in that: include: a first structural member; A second structural member, made of a material different from that of the first structural member, and located on a side surface of the first structural member; A first material body, which is made of the same material as the first structural member, and the first material body is connected to the one side surface of the first structural member; as well as The second material body is made of the same material as the second structural member, the second material body is connected to the second structural member, and the joint surface between the second material body and the second structural member intersects with the one side surface of the first structural member, and the orthographic projections of the second material body and the first material body on the one side surface of the first structural member overlap.

2. The composite article according to claim 1, characterized in that: The first material body is welded or integrally connected to the one side surface of the first structural member; and / or The second material body is welded or integrally connected to the second structural member.

3. The composite article according to claim 1, characterized in that: The first structural member is a titanium or titanium alloy structural member; and / or The second structural member is a steel structural member.

4. The composite article according to claim 1, characterized in that: The second structural member has a groove, and the first material body and the second material body are located at the bottom of the groove.

5. The composite article according to any one of claims 1 to 4, characterized in that: The second structural member has a through hole, and the first material body and the second material body are located in the through hole.

6. The composite article according to claim 5, characterized in that: It also includes a first diffusion soldering intermediate layer, wherein: The first material body, the first diffusion welding intermediate layer and the second material body are stacked in sequence along a direction away from the one side surface of the first structural member; The first material body is welded to the one side surface of the first structural member; The second material body and the first material body are welded via the first diffusion welding intermediate layer; The second material body is welded to the hole wall of the through hole.

7. The composite article according to claim 5, characterized in that: The first material body is in a T-shape, and the first material body is integrally connected with the first structural member to form an I-shaped structure; The second material body has a T-shaped groove embedded with the first material body, and the second material body is welded to the hole wall of the through hole.

8. The composite article according to claim 5, characterized in that: The first material body is in a T-shape, and the first material body is integrally connected with the first structural member to form an I-shaped structure; The second material body includes two L-shaped inserts, which are respectively engaged with two side grooves of the I-shaped structure, and the two L-shaped inserts are welded to the hole wall of the through hole.

9. The composite article according to claim 8, characterized in that: The two L-shaped inserts are arranged opposite to each other along a first direction, and a side of the first material body facing away from the first structural member has a mounting groove penetrating therethrough along a second direction, wherein the first direction and the second direction intersect and are both parallel to the one side surface of the first structural member; The composite component also includes a composite connector fixed to the mounting groove, and the composite connector includes a first material layer, a second diffusion welding intermediate layer, and a second material layer stacked in sequence, wherein the first material layer is the same material as the first structural member and is welded to the bottom of the mounting groove, the second material layer and the first material layer are welded through the second diffusion welding intermediate layer, and the second material layer is the same material as the second structural member and is welded to the hole wall of the through hole.

10. The composite article according to any one of claims 1 to 4, characterized in that: The first material body includes a columnar protrusion and a flange, wherein the columnar protrusion is integrally connected to the first structural member, and the flange is welded to an end of the columnar protrusion away from the first structural member; The second material body surrounds the columnar protrusion, and the second material body is integrally connected with the second structural member to form a stepped hole matching the shape of the first material body.

11. A terminal device, characterized in that: A composite article according to any one of claims 1 to 10, wherein: The first structural member is a housing of the terminal device; The second structural member is located on the inner surface of the shell and is connected to the shell.

12. The terminal device according to claim 11, characterized in that: The terminal device is a foldable display device, the foldable display device includes a foldable bending area, and the second structural member is located in the foldable bending area.

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