WO2019014811A1

WO2019014811A1 - Mobile terminal, structural member and manufacturing method therefor

Info

Publication number: WO2019014811A1
Application number: PCT/CN2017/093176
Authority: WO
Inventors: 黄礼忠; 乔艳党; 李威; 陈福嘉
Original assignee: 华为技术有限公司
Priority date: 2017-07-17
Filing date: 2017-07-17
Publication date: 2019-01-24
Also published as: CN110024499B; CN110024499A

Abstract

The embodiments of the present application provide a mobile terminal comprising a structural member, the structural member forming an integral structure, facilitating subsequent overall processing and being beneficial to the improvement of product dimensional accuracy. The structural member comprises: a middle plate and a frame, the frame being used for forming a bezel of a mobile terminal, and the middle plate being located in the mobile terminal and being used for forming an intermediate support plate of the mobile terminal; the frame comprises an inner frame layer and an outer frame layer, the materials of the inner frame layer and the outer frame layer being different; a contact face of the middle plate and the inner frame layer is connected by means of welding, and the melting point of the material of the inner frame layer is the same as or similar to that of the material of the middle plate.

Description

Mobile terminal, structural member and manufacturing method thereof

Technical field

The present application relates to the field of mobile terminals, and in particular, to a mobile terminal, a structural component applicable to the mobile terminal, and a method of manufacturing a structural component of the mobile terminal.

Background technique

In the existing mobile terminal, the appearance of stainless steel or the appearance of titanium alloy properties is one of the effects of color, material and finish (CMF) of the mobile terminal; but the thermal conductivity and density of stainless steel or titanium alloy are poor. Large, high hardness, is not conducive to product heat dissipation, lightweight and processing cost control.

Summary of the invention

The present application provides a mobile terminal, a structural member applicable to the mobile terminal, and a method of manufacturing the structural member of the mobile terminal, aiming at improving the bonding strength of the structural member and improving the overall product performance of the mobile terminal using the structural member.

Based on the above, the first aspect of the embodiments of the present application provides a method for manufacturing a structural member of a mobile terminal, which may include: forming a middle plate; forming at least one frame member, wherein the frame member is a unitary structure including an inner layer of the frame and The outer layer of the frame is different from the outer layer of the frame, the melting point of the inner material of the frame is the same as or the melting point of the material of the middle plate, and the shape of the at least one frame member is adapted to the middle plate; The panel and the inner layer contact surface of the at least one frame member are joined by soldering to form a structural member, the at least one frame member forming a frame of the mobile terminal, the middle panel forming an intermediate support plate of the mobile terminal. Among them, the one-piece structure can be understood as a structure that has uniform appearance and size characteristics.

In the embodiment of the present application, the middle plate and the at least one frame member are first formed, and the shape of the at least one frame member is matched with the middle plate, and then the at least one frame member and the middle plate are connected by welding to form the structural member. . Specifically, the structural member may include an inner layer of the frame and an outer layer of the frame, and the material of the inner layer of the frame and the outer material of the frame are different, and is an integrated structure; and the inner layer and the middle plate of the frame may be connected by welding twice to realize the heterogeneous whole High-strength, one-piece connection of metal. Facilitating the subsequent overall processing, which is conducive to the improvement of product dimensional accuracy, and is conducive to the matching of material properties and product requirements.

With reference to the first aspect of the embodiments of the present application, in a first possible implementation manner of the embodiment of the present application, the step of forming at least one frame member may include: rolling the inner layer of the frame and the outer layer of the frame And the thermal diffusion process is formed into a one-piece structure; the one-piece structure is blanked to obtain the at least one frame member. It should be understood that the integrated structure formed by the rolling and thermal diffusion is more firm, and the effect of the user can be achieved according to different material properties. Wherein, the blanking refers to the operation of removing a certain shape, quantity or quality of material from the whole or batch of materials after determining the shape, quantity or quality of the material required for making a certain equipment or product.

With reference to the first aspect or the first possible implementation manner of the embodiment of the present application, in a second possible implementation manner of the embodiment of the present application, the middle plate and the inner layer of the frame of the at least one frame member are connected by welding. The step may include: fixing the at least one frame member to the middle plate to form a frame; and connecting the intermediate plate to the frame inner layer contact surface of the frame by welding. It should be understood that when at least one frame member is connected to the intermediate plate by friction stir welding, at least one welded keyhole may be present, and the welded keyhole may be used for placing a camera, an antenna, etc., and the space for welding the keyhole may be effectively utilized.

With reference to the first aspect or the first possible implementation manner of the embodiment of the present application, in a third possible implementation manner of the embodiment of the present application, the at least one frame member is an annular frame member, and the middle plate and the The inner layer contact faces of the at least one frame member are joined by welding, and may include: joining the middle plate to the inner layer contact surface of the annular frame member by welding, the annular frame being a stamped frame. The entire ring frame is integrated for easy soldering connections.

With reference to the first aspect, the first to the third possible implementation manners of the embodiments of the present application, in the fourth possible implementation manner of the embodiment of the present application, the middle board and the at least one frame part are The step of connecting the inner layer contact surface of the frame by welding may include: connecting the middle plate to the inner layer contact surface of the at least one frame member by friction stir welding, electron beam welding, plasma welding or laser welding. For example, friction stir welding is difficult to connect metals (such as stainless steel and aluminum alloy) having a large difference in melting point. However, in the embodiment of the present application, the melting point of the middle plate material is the same as or similar to the melting point of the inner layer material of the frame, so friction stir is used. The welding has a high bonding strength between the inner and middle plates of the frame, and the welding deformation is relatively small; it is beneficial to improve the reliability of the product, and is beneficial to the product structure design and processing precision control. The inner and middle plates of the frame can be integrally connected. .

With reference to the first aspect, the first to the fourth possible implementation manners of the embodiments of the present application, in the fifth possible implementation manner of the embodiment of the present application, the material of the middle plate includes an aluminum alloy and a magnesium alloy. And/or a copper alloy; the material of the inner layer of the frame comprises the aluminum alloy, the magnesium alloy and/or the copper alloy; the material of the outer layer of the frame comprises stainless steel, titanium alloy and/or ceramic. It should be understood that in the same structural member, the materials of the outer layer of the frame may be the same or different. For example: when the same, the outer layer material of the frame parts of all frame parts is made of stainless steel; when different, the outer layer material of the frame of the upper frame part and the lower frame part is made of stainless steel, and the outer layer material of the frame of the left frame part and the right frame part For titanium alloy, the specifics are not limited. Alternatively, in the same structural member, the materials of the inner layer of the frame may be the same or different. For example: when the same, the inner layer material of all the frame members is aluminum alloy; when different, the inner layer material of the upper frame member and the lower frame member is aluminum alloy, and the inner layer material of the left frame member and the right frame member is For the magnesium alloy, the specifics are not limited.

If the material selected in the inner and middle plates of the frame is aluminum alloy, magnesium alloy and/or copper alloy, the heat dissipation of the product can be improved, the weight of the product can be reduced, and the difficulty of the CNC can be reduced and the processing cost can be reduced. Moreover, the melting points of the inner and middle plates of the frame are the same or similar, and the bonding strength by the friction stir welding connection is relatively high, and the dimensional deformation is relatively small. If the material of the outer layer of the frame is stainless steel, the gloss effect of the properties of the stainless steel material can be achieved; if the material of the outer layer of the frame is titanium alloy, the gloss effect of the properties of the titanium alloy can be achieved; if the material of the outer layer of the frame is ceramic, the ceramic property can be realized. The gloss effect; meet the user's appearance requirements for the mobile terminal.

With reference to the first aspect, the first to the fifth possible implementation manners of the embodiments of the present application, in a sixth possible implementation manner of the embodiment of the present application, the middle plate and the at least one frame member are formed as One piece structure.

With reference to the first aspect, the first to the sixth possible implementation manners of the embodiments of the present application, in the seventh possible implementation manner of the embodiment of the present application, the thickness of the inner layer of the frame is greater than or equal to the outer frame of the frame. The thickness of the layer. That is, while the outer layer of the frame satisfies the specific appearance effect, the weight of the product can be minimized.

With reference to the first aspect, the first to the seventh possible implementation manners of the embodiments of the present application, in the eighth possible implementation manner of the embodiment of the present application, the mechanical strength of the outer layer of the frame is greater than The mechanical strength of the layer. The material of the outer layer of the frame is different from the material of the inner layer of the frame. For example, if the mechanical strength of the outer layer of the frame is greater than the mechanical strength of the inner layer of the frame, the outer frame of the formed structural member is relatively durable and resistant to falling. Wherein, the mechanical strength may include hardness and strength, wherein the strength may be yield strength and tensile strength.

With reference to the first aspect, the first to the eighth possible implementation manners of the embodiments of the present application, in the ninth possible implementation manner of the embodiment of the present application, the middle plate is a plate, a solid profile, and an anisotropic profile. Or materials such as hollow profiles are not limited.

With reference to the first aspect, the first to the ninth possible implementation manners of the embodiments of the present application, in the tenth possible implementation manner of the embodiment of the present application, the melting point of the inner layer material of the frame and the material of the middle plate material The same or similar melting points may include, but are not limited to, the absolute value of the difference between the melting point of the inner layer material of the frame and the melting point of the medium plate material is less than a preset threshold, or the ratio of the melting point of the inner layer material of the frame to the melting point of the medium plate material is Within the preset range, either the melting point of the material of the inner layer of the frame and the melting point of the material of the middle plate have the same subset melting point interval. It should be understood that materials with the same or similar melting points are easier to weld together, and the preset threshold and threshold range are both empirical values and can be adjusted in time according to actual needs.

A second aspect of the present application provides a method for manufacturing a mobile terminal, which may include: fabricating a structure according to the first aspect of the first embodiment of the present application, and the first to the tenth possible implementation manners of the first aspect And reusing the structural member to form the mobile terminal. I will not repeat them here.

A third aspect of the embodiments of the present application provides a mobile terminal, where the mobile terminal includes a structural component, and the structural component may include: a middle board and a frame, where the frame is used to form a frame of the mobile terminal, where the middle board is located in the mobile terminal Forming an intermediate support plate of the mobile terminal, which can be used to support several devices of the mobile terminal; the frame includes an inner layer of the frame and an outer layer of the frame, and the inner layer of the frame and the outer layer of the frame are an integral structure; the middle plate and the The contact surface of the inner layer of the frame is connected by friction stir welding, and the melting point of the inner layer material of the frame is the same as or similar to the melting point of the middle plate material; the middle plate material and the inner layer material of the frame are aluminum alloy, and the outer layer material of the frame is Stainless steel or titanium alloy.

In the embodiment of the present application, the structural member may include: a middle plate and a frame, the frame is used to form a frame of the mobile terminal, and the middle plate is located in the mobile terminal, and serves as an intermediate support plate of the mobile terminal, and can be used for supporting a plurality of devices of the mobile terminal; the frame comprises an inner layer of the frame and an outer layer of the frame, the inner layer of the frame is made of aluminum alloy, the material of the middle plate is also aluminum alloy, and the outer layer of the frame is made of stainless steel or titanium alloy, because the frame is The melting point of the outer layer of the layer and the outer layer of the frame is too large, and it is a one-piece structure. Specifically, the stacking and thermal diffusion processes can be used as a one-piece structure; the materials of the inner layer and the middle plate of the frame are all aluminum alloy, and the combination of friction stir welding is used. The strength is high, the dimensional deformation after welding is small, and it is beneficial to the product structure design and processing precision control. Moreover, because the density of the aluminum alloy is small, the weight of the structural member can be greatly reduced, and the material of the outer layer of the frame is stainless steel. The appearance effect of the stainless steel material can be realized, and when the material of the outer layer of the frame is a titanium alloy, the appearance effect of the titanium alloy can be achieved, reaching the consumer. Appearance demand.

A fourth aspect of the present application provides a mobile terminal, which includes a structural member and a plurality of devices, and the structural member may include: a middle board and a frame, the frame is used to form a frame of the mobile terminal, where the middle board is located In the mobile terminal, an intermediate support plate of the mobile terminal is formed, which can be used to support several devices of the mobile terminal; the frame includes an inner layer of the frame and an outer layer of the frame, and the inner layer of the frame and the outer layer of the frame are a unitary structure, the frame The inner layer is different from the outer layer material of the frame; the contact surface of the middle plate with the inner layer of the frame is joined by welding, and the melting point of the inner layer material of the frame is the same as or similar to the melting point of the medium plate material. Among them, the one-piece structure can be understood as a structure that has uniform appearance and size characteristics.

In the embodiment of the present application, the mobile terminal may include a structural member including a middle board and a frame, and the frame is configured to form a frame of the mobile terminal, where the middle board is located in the mobile terminal as a mobile terminal. An intermediate support plate that can be used to support several components of the mobile terminal; the frame includes an inner layer of the frame and an outer layer of the frame, The inner layer of the frame and the outer layer of the frame are of a one-piece structure, and the inner layer of the frame and the outer layer of the frame are different; the inner layer of the frame and the middle plate can be welded, and the melting point of the inner material of the frame is the same as or similar to the melting point of the medium material. The structural member can support the strength of the mobile terminal. That is, the inner layer of the frame and the outer layer of the frame are integrated structures, and the inner layer and the middle plate of the frame can be welded and connected to form an integrated structure, which facilitates subsequent overall processing, is beneficial to the improvement of product dimensional precision, and is beneficial to material properties and products. Matching of requirements.

In conjunction with the fourth aspect of the embodiments of the present application, in a first implementation manner of the fourth aspect of the embodiments of the present application, the inner layer of the frame and the outer layer of the frame are formed into a unitary structure by a stacking and thermal diffusion process. It should be understood that the integrated structure formed by the rolling and thermal diffusion is more robust, and the user's needs can be achieved according to different material properties.

With reference to the fourth aspect or the first possible implementation manner of the embodiment of the present application, in the second possible implementation manner of the embodiment of the present application, the contact surface of the middle plate and the inner layer of the frame is friction stir welded, electronic Beam welding, plasma welding or laser welding. For example, friction stir welding is difficult to connect metals (such as stainless steel and aluminum alloy) having a large difference in melting point. However, in the embodiment of the present application, the melting point of the middle plate material is the same as or similar to the melting point of the inner layer material of the frame, so friction stir is used. The welding has a high bonding strength between the inner and middle plates of the frame, and the welding deformation is relatively small; it is beneficial to improve the reliability of the product, and is beneficial to the product structure design and processing precision control. The inner and middle plates of the frame can be integrally connected. .

With reference to the fourth aspect, the first possible implementation manner, or the second possible implementation manner of the embodiment of the present application, in a third possible implementation manner of the embodiment of the present application, the material of the middle board includes an aluminum alloy, a magnesium alloy and/or a copper alloy; the material of the inner layer of the frame comprises the aluminum alloy, the magnesium alloy and/or the copper alloy; the material of the outer layer of the frame comprises stainless steel, titanium alloy and/or ceramic.

With reference to the fourth aspect of the present application, the first to the third possible implementation manners, in the fourth possible implementation manner of the embodiment of the present application, the at least one frame member is connected by welding The frame is formed on the board. It should be understood that when at least one frame member is connected to the intermediate plate by friction stir welding, at least one welded keyhole may be present, and the welded keyhole may be used for placing a camera, an antenna, etc., and the space for welding the keyhole may be effectively utilized.

With reference to the fourth aspect, the first to the third possible implementation manners of the embodiments of the present application, in a fifth possible implementation manner of the embodiment of the present application, the at least one frame member is a ring formed by stamping. Box. The entire frame is integrated for easy soldering connections.

With reference to the fourth aspect, the first to the fifth possible implementation manners of the embodiments of the present application, in the sixth possible implementation manner of the embodiment of the present application, the middle board and the at least one frame part are integrated structure.

With reference to the fourth aspect, the first to the sixth possible implementation manners of the embodiments of the present application, in a seventh possible implementation manner of the embodiment of the present application, the thickness of the inner layer of the frame is greater than or equal to the outer frame of the frame. The thickness of the layer. That is, while the outer layer of the frame satisfies the specific appearance effect, the weight of the product can be minimized.

With reference to the fourth aspect, the first to the seventh possible implementation manners of the embodiments of the present application, in the eighth possible implementation manner of the embodiment of the present application, the mechanical strength of the outer layer of the frame is greater than The mechanical strength of the layer. The material of the outer layer of the frame is different from the material of the inner layer of the frame. For example, if the mechanical strength of the outer layer of the frame is greater than the mechanical strength of the inner layer of the frame, the outer frame of the formed structural member is relatively durable and resistant to falling. Wherein, the mechanical strength may include hardness and strength, wherein the strength may be yield strength and tensile strength.

With reference to the fourth aspect, the first to the eighth possible implementation manners of the embodiments of the present application, in the ninth possible implementation manner of the embodiment of the present application, the material of the middle plate may be a plate or a solid profile. Materials such as a profiled profile or a hollow profile are not specifically limited.

With reference to the fourth aspect, the first to the ninth possible implementation manners of the embodiments of the present application, in the tenth possible implementation manner of the embodiment of the present application, the melting point of the inner layer material of the frame and the material of the middle plate material The same or similar melting points may include, but are not limited to, the absolute value of the difference between the melting point of the inner layer material of the frame and the melting point of the medium plate material is less than a preset threshold, or the ratio of the melting point of the inner layer material of the frame to the melting point of the medium plate material is Within the preset range, either the melting point of the material of the inner layer of the frame and the melting point of the material of the middle plate have the same subset melting point interval. It should be understood that materials with the same or similar melting points are easier to weld together, and the preset threshold and threshold range are both empirical values and can be adjusted in time according to actual needs.

In an embodiment of the present application, the mobile terminal includes a structural member including a middle plate and a frame, the frame is used to form a frame of the mobile terminal, and the middle plate is used to form an intermediate support plate of the mobile terminal; the frame includes The inner layer of the frame and the outer layer of the frame, the inner layer of the frame and the outer material of the frame are different; the inner layer and the middle plate of the frame may be welded and connected, and the melting point of the inner layer material of the frame is the same as or similar to the melting point of the medium plate material. The bonding strength of the structural member can be improved, and the overall product performance of the mobile terminal using the structural member can be improved. That is, the frame includes the inner layer of the frame and the outer layer of the frame, and the inner layer and the middle plate of the frame can be welded and connected to form an integrated structure, which facilitates subsequent overall processing, is beneficial to the improvement of product dimensional precision, and is beneficial to material properties and product requirements. match.

DRAWINGS

1 is a schematic diagram of a process of processing a structural member of a mobile terminal;

2 is a schematic diagram of another process of processing a structural member of a mobile terminal;

3A is a schematic diagram of an embodiment of a structural component of a mobile terminal according to an embodiment of the present application;

3B is a schematic view showing a process of stack rolling and thermal diffusion in the embodiment of the present application;

3C is a schematic view showing a process of friction stir welding in the embodiment of the present application;

4A-4C are schematic diagrams showing structural components of a mobile terminal according to an embodiment of the present application;

4P is a schematic diagram of structural components of a mobile terminal processed and formed in the embodiment of the present application;

4Q is a schematic cross-sectional view showing the structural member of the mobile terminal processed and formed in the embodiment of the present application;

4R is a schematic view showing the thickness of the inner layer of the frame and the thickness of the outer layer of the frame in the embodiment of the present application;

FIG. 5 is a schematic diagram of an embodiment of a method for manufacturing a structural component of a mobile terminal according to an embodiment of the present application; FIG.

6A is a schematic view showing an intermediate plate formed of an A1 alloy in the embodiment of the present application;

6B is a schematic view showing a process of laminating and thermally diffusing A2 alloy and X material in the embodiment of the present application;

6C is a schematic view showing at least one frame member obtained by cutting a sheet material in an embodiment of the present application;

6D is a schematic view of welding by friction stir welding in the embodiment of the present application;

FIG. 6E is a schematic view showing the forging of the integral structure formed by at least one frame member and the middle plate in the embodiment of the present application.

Detailed ways

The technical solutions in the embodiments of the present application are described below with reference to the accompanying drawings in the embodiments of the present application. It is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments obtained by a person skilled in the art based on the embodiments of the present application without creative efforts are within the scope of the present application.

In a scheme of "stainless steel frame, medium plate forging + computerized numerical control machine (CNC)", as shown in FIG. 1, it is a schematic diagram of a process for processing a structural member of a mobile terminal. The stainless steel sheet is forged in a plurality of steps to form an initial blank, and then the final product is obtained by CNC+ nano-molding (NMT)+post-treatment+physical vapor deposition (PVD). However, in this scheme, stainless steel has poor thermal conductivity (thermal conductivity: 15-20 watts/(m. Kelvin, W/mK)), which is disadvantageous for heat dissipation of the product; stainless steel has a high density (7.9 kg/m ² ), which is not conducive to product weight reduction. Stainless steel has high hardness, long CNC machining time, serious tool loss and high processing cost.

In a scheme of "forging stainless steel frame and die-cast aluminum plate riveting (or laser welding)". As shown in FIG. 2, it is another schematic diagram of a process for processing a structural member of a mobile terminal. The stainless steel middle frame frame can be obtained through multi-step forging and CNC, and it can be connected with the die-cast aluminum middle plate by riveting or laser welding, and then the final product can be obtained by CNC+NMT+ post-treatment + PVD. However, in this solution, the riveting takes up a large space, especially the thickness direction, which is not conducive to product design; the frame is stainless steel is not conducive to product weight reduction; the frame is stainless steel, and the processing cost is high. The way to connect the frame and the middle plate is as follows: if the riveted connection is adopted, the riveting takes up a large space, especially the thickness direction, which is not conducive to product design; if the welding (such as laser welding) is used, the welding bonding strength is low, It is not conducive to product reliability control, and the dimensional deformation after welding is large, which is not conducive to product precision control.

In the embodiment of the present application, the mobile terminal includes a structural member including a middle plate and a frame, and the frame is used to form a frame of the mobile terminal, the middle plate is located in the mobile terminal, and is used to support several devices of the mobile terminal. The frame comprises an inner layer of the frame and an outer layer of the frame, and the outer layer of the frame and the outer layer of the frame are a unitary structure, and the inner layer of the frame and the outer layer of the frame are different; the inner layer of the frame and the inner plate of the frame can be welded and connected to form a structural member. The melting point of the inner material of the frame is the same as or similar to the melting point of the medium plate material. Finally, a one-piece structure is formed, which not only effectively improves the bonding strength of the inner plate, the inner layer of the frame and the outer layer of the frame, but also facilitates the subsequent overall processing, which is beneficial to the improvement of the dimensional accuracy of the product, and is advantageous for the matching of material properties and product requirements.

The technical solution of the present application is further described in the following embodiments. As shown in FIG. 3A, it is a schematic diagram of an embodiment of a mobile terminal according to an embodiment of the present application; the mobile terminal includes a structural component 30, and the structural component 30 includes:

The middle plate 301 and the frame 302 are used to form a frame of the mobile terminal, the middle plate 301 is used to form an intermediate support plate of the mobile terminal, and can support several devices of the mobile terminal; the frame 302 includes a frame inner layer 3021 and a frame outer layer 3022. The frame inner layer 3021 and the frame outer layer 3022 are of a unitary structure, and the frame inner layer 3021 and the frame outer layer 3022 are different in material; the contact faces of the middle plate 301 and the frame inner layer 3021 are joined by welding, and the melting point of the material of the inner layer 3021 of the frame is The melting point of the medium plate 301 material is the same or similar.

In the embodiment of the present application, the mobile terminal includes a structural member, and may further include a plurality of devices; the structural member further includes a middle plate and a frame, the frame includes an inner layer of the frame and an outer layer of the frame, and the inner layer of the frame and the outer layer of the frame are an integral structure. The inner layer of the frame and the outer material of the frame are different; the inner layer and the middle plate of the frame can be welded and connected, and the melting point of the inner material of the frame is the same as or similar to the melting point of the material of the middle plate; the frame is used to form the frame of the mobile terminal, and the middle plate is located In the mobile terminal, as an intermediate support board of the mobile terminal, several devices of the mobile terminal may be disposed on the middle board. The structural member can support the strength of the mobile terminal. That is, the inner layer of the frame and the outer layer of the frame are integrated structures, and the inner layer and the middle plate of the frame can be welded and connected to form an integrated structure, which not only effectively improves the bonding strength of the inner plate, the inner layer of the frame and the outer layer of the frame, but also facilitates subsequent The overall processing is conducive to the improvement of product dimensional accuracy, which is conducive to the matching of material properties and product requirements. Among them, the one-piece structure can be understood as a structure that has uniform appearance and size characteristics.

Optionally, in some embodiments of the present application, the melting point of the material of the inner layer 3021 of the frame is the same as or similar to the melting point of the material of the middle plate 301, and may include, but is not limited to, the melting point of the material of the inner layer 3021 of the frame and the melting point of the material of the middle plate 301. The absolute value of the difference is less than the preset threshold, or the ratio of the melting point of the material of the inner layer 3021 of the frame to the melting point of the material of the middle plate 301 is within a preset range, or the melting point of the material of the inner layer 3021 of the frame and the material of the middle plate 301 The melting point exists in the same subset melting point interval. It should be understood that materials with the same or similar melting points are easier to weld together, and the preset threshold and threshold range are both empirical values and can be adjusted in time according to actual needs. For example, the preset threshold may be 300 ° C or 400 ° C; the preset range may be between 0.5 and 1.5 (if the medium material of the middle plate and the inner layer of the frame are aluminum alloy, the melting point may be the same, the ratio is 1, at 0.5 Between 1 and 1). There are the same subset melting point intervals: for example, the melting point of the aluminum alloy may be 450-660 ° C, and the melting point of the magnesium alloy may be 430-650 ° C. Then, the melting point interval of the same subset is 430-650 ° C.

It should be understood that the mobile terminal may include any terminal device such as a mobile phone, a tablet computer, a personal digital assistant (PDA), a point of sales (POS), a car computer, a wearable device, and the like. Several devices may include devices for mobile terminals such as batteries, motherboards, front cameras, rear cameras, stereos, and vibration motors.

Optionally, in some embodiments of the present application, the inner frame layer 3021 and the outer layer 3022 of the frame are formed into a unitary structure by a lamination and thermal diffusion process. It should be understood that the integrated structure formed by the rolling and thermal diffusion is more robust, and the user's needs can be achieved according to different material properties.

Illustratively, as shown in FIG. 3B, is a schematic diagram of a lamination and thermal diffusion process in an embodiment of the present application. In practical applications, (1) material A and material B can be surface treated (such as oil cleaning, brush polishing, deoxidation layer, etc.) to make the bonding surface clean; (2) stack material A and material B (for example, pre-fixed with rivets); (3) placing the superposed material A and material B on the roll, performing the roll-to-roll connection to form the A+B material; (4) finally thermally attenuating the A+B material So that the bonding interface atoms diffuse each other and enhance the interface bonding strength.

Optionally, in some embodiments of the present application, the contact surface of the middle plate 301 and the inner layer 3021 of the frame is connected by friction stir welding, electron beam welding, plasma welding or laser welding. It should be noted that, when the middle plate 301 and the inner layer 3021 of the frame are welded, in a possible implementation manner, the contact surface of the middle plate 301 and the inner layer 3021 of the frame can be fully welded, that is, the middle plate 301 and the inner layer of the frame. The contact surface of 3021 is fully welded, not interval welded, not spot welded, or welded through several joints. It has very good mechanical properties compared to existing welded joints and glue joints, such as bonding degree, overall Mechanical strength, etc. In another possible implementation manner, the contact surface of the middle plate 301 and the inner layer 3021 of the frame is fully connected by friction stir welding, and at least one welded keyhole may be present. It should be understood that in actual product applications, the soldering keyhole can be used to place a camera, an antenna, etc., and the space for soldering the keyhole can be effectively utilized.

Here is a brief description of friction stir welding, which can combine two different materials or metals of the same material. FIG. 3C is a schematic view showing a process of friction stir welding in the embodiment of the present application.

The friction stir welding process is as follows: a cylindrical mixing head with a special shoulder and a needle protrusion is rotated to insert the workpiece to be welded, and the friction between the stirring head and the material to be welded generates frictional heat to thermally plasticize the material to be welded. As the agitating tool moves forward along the interface to be welded, the thermoplasticized material is transferred from the front to the rear of the agitating head and the solid phase connection between the workpieces is achieved under the mechanical forging of the agitating tool.

Friction stir welding has the following advantages: solid phase connection, excellent joint performance, less weld defects; small influence of human factors during mechanization; no need for opening and special cleaning before welding; small deformation and shrinkage of welding; no welding fumes And splash, no ultraviolet and electromagnetic radiation; no protective gas, filling material; green, non-polluting; high production efficiency, for example, 1-50mm weld can be penetrated once.

However, friction stir welding is difficult to connect metals having a large difference in melting point (such as stainless steel and aluminum alloy), and the absolute value of the difference between the melting point of the material of the middle plate 301 and the melting point of the material of the inner layer 3021 of the frame in the embodiment of the present application is smaller than that of the preheating. The threshold is set, or the ratio of the melting point of the material of the inner layer 3021 of the frame to the melting point of the material of the middle plate 301 is within a preset range, or the melting point of the material of the inner layer 3021 of the frame has the same melting point of the melting point of the material of the middle plate 301. Therefore, in the present application, the friction strength of the frame inner layer 3021 and the middle plate 301 is relatively high, and the welding deformation is relatively small; the reliability of the product is improved, and the product structure design and processing precision are facilitated. Control, the inner frame 3021 and the inner plate 301 can be integrally connected.

Optionally, in some embodiments of the present application, the material of the middle plate 301 includes an aluminum alloy, a magnesium alloy, and/or a copper alloy; the material of the inner layer 3021 of the frame includes an aluminum alloy, a magnesium alloy, and/or a copper alloy; The material of layer 3022 includes stainless steel, titanium alloys, and/or ceramics. It should be understood that in the same structural member 30, the material of the outer layer 3022 of the frame may be the same or different. For example: when the same, the outer layer material of the frame parts of all frame parts is made of stainless steel; when different, the outer layer material of the frame of the upper frame part and the lower frame part is made of stainless steel, and the outer layer material of the frame of the left frame part and the right frame part For titanium alloy, the specifics are not limited. Alternatively, in the same structural member 30, the material of the inner layer 3021 of the frame may be the same or different. For example: when the same, the inner layer material of all the frame members is aluminum alloy; when different, the inner layer material of the upper frame member and the lower frame member is aluminum alloy, and the inner layer material of the left frame member and the right frame member is For the magnesium alloy, the specifics are not limited.

Illustratively, the melting point of the aluminum alloy may be 450-660 ° C, the melting point of the magnesium alloy may be 430-650 ° C, and the melting point of the stainless steel may be 1200-1550 ° C. (1) When the material of the middle plate 301 is aluminum alloy, the material of the inner layer 3021 of the frame is aluminum alloy, and the material of the outer layer 3022 of the frame is stainless steel, the outer layer 3022 of the frame can realize the appearance effect of the properties of the stainless steel material, the inner layer 3021 of the frame and The melting point of the outer layer 3022 of the frame is relatively different, and can be connected by a stacking and thermal diffusion process, and then the melting point of the middle plate 301 and the inner layer 3021 of the frame are similar, and it is easy to achieve high-strength connection by friction stir welding, and finally form a whole structure, and then The overall structure is subjected to a common process such as CNC, NMT, surface treatment, PVD, etc., to obtain a structural member of the mobile terminal. In some embodiments, the structural member may be a finished product.

(2) When the material of the middle plate 301 is aluminum alloy, the material of the inner layer 3021 of the frame is aluminum alloy, and the material of the outer layer 3022 of the frame is titanium alloy, the outer layer 3022 of the frame can realize the appearance effect of the properties of the titanium alloy material, and the inner layer of the frame 3021 and The melting point of the outer layer 3022 of the frame is relatively different, and can be connected by a stacking and thermal diffusion process, and then the melting point of the middle plate 301 and the inner layer 3021 of the frame are similar, and it is easy to achieve high-strength connection by friction stir welding, and finally form a whole structure, and then The overall structure is subjected to a common process such as CNC, NMT, surface treatment, PVD, etc., to obtain a structural member of the mobile terminal. In some embodiments, the structural member may be a finished product.

Optionally, in some embodiments of the present application, the frame 302 is a frame formed by joining at least one frame member to the intermediate plate by welding. It should be understood that when at least one frame member is joined to the intermediate plate 301 by friction stir welding, at least one welded keyhole may be present, and the welded keyhole may be used for placing a camera, an antenna, etc., and the space for welding the keyhole may be effectively utilized.

Illustratively, as shown in FIG. 4A-4B, which is a few exemplary diagrams of the structural components of the mobile terminal in the embodiment of the present application, the frame 302 is composed of a structural component. For example, in the schematic diagram shown in FIG. 4A, there is a structural member slit, and the entire frame 302 is integrated to facilitate the soldering connection. This slit can be used as an antenna slit later, and is disposed on the top layer to better match the antenna design. .

As shown in FIG. 4C-4H, which are several exemplary diagrams of the structural components of the mobile terminal in the embodiment of the present application, the frame 302 is composed of two structural members. For example, in the schematic views shown in Figures 4C and 4G, there are two structural member slots that better match the antenna or other structural design.

4I-4K are several exemplary diagrams of the structural components of the mobile terminal in the embodiment of the present application, and the frame 302 is composed of three structural members. For example, in the schematic diagrams shown in FIGS. 4I and 4J, there are three structural member slits, one on the top layer, two on the bottom layer or two sides, and the gap between the two structural members is symmetrical, as a whole, The antenna seam looks beautiful.

4L-4N are several exemplary diagrams of the structural components of the mobile terminal in the embodiment of the present application, and the frame 302 is composed of four structural members. For example, in the schematic diagrams shown in FIG. 4L and FIG. 4M, there are four structural member slits, and the four structural member slits are symmetric from top to bottom and left and right, and can be used as an antenna slit and are more beautiful.

It should be noted that, with respect to FIGS. 4A-4N, only a few schematic diagrams of the structural components of the mobile terminal, the structural components of the actually produced mobile terminal include but are not limited to those shown in FIGS. 4A-4N.

Alternatively, in some embodiments of the present application, the frame 302 is an annular frame that is formed by stamping. Illustratively, as shown in FIG. 4O, another schematic diagram of the structural components of the mobile terminal in the embodiment of the present application.

Optionally, in some embodiments of the present application, the middle plate 301 and the frame 302 are of unitary structure. Illustratively, as shown in FIG. 4P, another schematic view of the structural member of the formed mobile terminal, as shown in FIG. 4Q, is a schematic cross-sectional view of the structural member of the formed mobile terminal.

Alternatively, in some embodiments of the present application, the shape of the frame 302 and the shape of the midplane 301 coincide with each other.

Optionally, in some embodiments of the present application, the intermediate plate 301 is required to be formed by die cutting, sawing, forging, or CNC. Find the shape and size of the board, or a cast-formed board.

Optionally, in some embodiments of the present application, the thickness L1 of the inner layer 3021 of the frame is greater than or equal to the thickness L2 of the outer layer 3022 of the frame. For example, the thickness L1 of the inner layer of the frame may be between 2 mm and 10 mm. Specifically, the thickness L1 of the inner layer of the frame may be 6 mm, 7 mm, etc., which may be determined according to actual needs; the thickness L2 of the outer layer of the frame may be 0.1-2 mm. Specifically, the thickness L2 of the outer layer of the frame may be 0.8 mm, 0.6 mm, etc., depending on actual needs. That is, the outer layer of the frame 3022 can meet the specific appearance effect and product size requirements, and the weight of the product can be reduced as much as possible. As shown in Fig. 4R, it is a schematic view of the thickness of the inner layer of the frame and the thickness of the outer layer of the frame.

Optionally, in some embodiments of the present application, the mechanical strength of the outer layer of the frame is greater than the mechanical strength of the inner layer of the frame. Wherein, the mechanical strength may include hardness and strength, and may be embodied as the material density of the X material is greater than the material density of the A2 alloy, wherein the strength may be the yield strength and the tensile strength. The material of the outer layer 3022 of the frame is different from the material of the inner layer 3021 of the frame. If the mechanical strength of the outer layer 3022 of the frame is greater than the mechanical strength of the inner layer 3021 of the frame, the frame of the formed structural member is relatively durable and resistant to falling.

Optionally, in some embodiments of the present application, the middle plate 301 may be a plate material, a solid profile, an anisotropic profile or a hollow profile, and is not specifically limited.

In the embodiment of the present application, the structural component of the mobile terminal includes a middle board and a frame, the frame is used to form a frame of the mobile terminal, and the middle board is located in the mobile terminal for supporting several devices of the mobile terminal; the frame further includes an inner layer of the frame and The outer layer of the frame, the inner layer of the frame and the outer layer of the frame are different in material, and can be connected into a one-piece structure by stack rolling and thermal diffusion processes, thereby realizing the integral connection of dissimilar metals, and then the inner and middle plates of the frame can be friction stir welded. Electron beam welding, plasma welding or laser welding technology for secondary connection to achieve high-strength integrated connection of dissimilar metals; subsequent overall forging, CNC, NMT, forming, surface treatment and PVD processes to form stainless steel, titanium alloy Or the appearance effect of materials such as ceramics, and the internal structure of materials such as aluminum alloys, magnesium alloys, or copper alloys. If the inner layer and the middle plate of the frame are made of aluminum alloy, the bonding strength by friction stir welding is relatively high, and the high heat conductivity of the aluminum alloy can improve the heat dissipation of the product; the density of the aluminum alloy is relatively low, and the weight of the product can be reduced, and The use of aluminum alloy for easy machinability also reduces processing costs.

It should be noted that, in combination with the foregoing embodiment, in a possible implementation manner, the mobile terminal includes a structural component 30, and the structural component 30 includes:

The middle plate 301 and the frame 302 are used to form a frame of the mobile terminal. The middle plate 301 is located in the mobile terminal, forming an intermediate support plate of the mobile terminal, which can be used to support several devices of the mobile terminal; the frame 302 includes the inner layer 3021 of the frame. And the frame outer layer 3022, the frame inner layer 3021 and the frame outer layer 3022 are of a unitary structure, the frame inner layer 3021 and the frame outer layer 3022 are different in material; the contact surface of the middle plate 301 and the frame inner layer 3021 is connected by friction stir welding, the frame The melting point of the material of the inner layer 3021 is the same as or similar to the melting point of the material of the middle plate 301; the material of the outer layer 3022 of the frame is stainless steel, and the material of the inner layer 3021 of the frame and the middle plate 301 is an aluminum alloy.

In the embodiment of the present application, the structural component of the mobile terminal includes a middle board and a frame, the frame is used to form a frame of the mobile terminal, and the middle board is located in the mobile terminal, and is used as an intermediate support board of the mobile terminal, and can be used to support the mobile terminal. The frame further includes an inner layer of the frame and an outer layer of the frame, and the inner layer of the frame and the outer layer of the frame are different in material; the inner layer of the frame is made of aluminum alloy, the material of the middle plate is also aluminum alloy, and the outer layer of the frame is made of stainless steel. Because the melting point of the inner layer of the frame and the outer layer of the frame are too different, and the structure is a one-piece structure, the stacking and thermal diffusion processes can be used as a one-piece structure; The material of the layer and the middle plate are aluminum alloy, the joint strength by the friction stir welding connection is high, the dimensional deformation after welding is small, and the product structure design and the processing precision control are favorable, and because the density of the aluminum alloy is small, it can be very The weight of the structural parts is greatly reduced, and when the outer layer of the frame is made of stainless steel, the appearance of the stainless steel material can be achieved to meet the consumer's appearance requirements.

In conjunction with the above embodiments, in another possible implementation, the mobile terminal includes a structural member 30 and a plurality of devices, and the structural member 30 includes:

The middle plate 301 and the frame 302 are used to form a frame of the mobile terminal, and the middle plate 301 is used to form an intermediate support plate of the mobile terminal; the frame 302 includes a frame inner layer 3021 and a frame outer layer 3022, the inner frame layer 3021 and the outer frame The layer 3022 is different in material; the contact surface of the middle plate 301 and the inner layer 3021 of the frame is connected by friction stir welding, and the melting point of the material of the inner layer 3021 of the frame is the same as or similar to the melting point of the material of the middle plate 301; the material of the outer layer 3022 of the frame is titanium alloy. The material of the inner layer 3021 and the middle plate 301 is an aluminum alloy.

In the embodiment of the present application, the structural component of the mobile terminal includes a middle board and a frame, the frame is used to form a frame of the mobile terminal, and the middle board is located in the mobile terminal, and is used as an intermediate support board of the mobile terminal, and can be used to support the mobile terminal. The frame further includes an inner layer of the frame and an outer layer of the frame, and the inner layer of the frame and the outer layer of the frame are different in material; the inner layer of the frame is made of aluminum alloy, the material of the middle plate is also aluminum alloy, and the outer layer of the frame is made of stainless steel. Because the melting point of the inner layer of the frame and the outer layer of the frame are too different, as a one-piece structure, the stacking and thermal diffusion processes can be used as a one-piece structure; the inner and middle plates of the frame are made of aluminum alloy, and friction stir welding is performed. The joint strength of the joint is high, the dimensional deformation after welding is small, and it is beneficial to the product structure design and the processing precision control. Moreover, because the density of the aluminum alloy is small, the weight of the structural member can be greatly reduced, and the material of the outer layer of the frame is When it is a titanium alloy, the appearance of the titanium alloy material can be achieved to meet the consumer's appearance requirements.

A method for manufacturing a structural component of a mobile terminal in the embodiment of the present application is further illustrated. As shown in FIG. 5, a schematic diagram of an embodiment of a structural component for manufacturing a mobile terminal according to an embodiment of the present application includes:

501, processing to form a medium plate.

In the embodiment of the present application, the material of the middle plate is simply referred to as an A1 alloy, and the A1 alloy may include an aluminum alloy, a magnesium alloy, and/or a copper alloy. As shown in FIG. 6A, a schematic view of forming an intermediate plate for processing an A1 alloy, wherein the intermediate plate is located in a mobile terminal for supporting a plurality of devices of the mobile terminal. That is, the A1 alloy can be obtained by punching, sawing, forging or CNC forming to obtain the intermediate plate of the required shape and size. Among them, the A1 alloy may be a plate, a solid profile, an anisotropic or hollow profile. It should be understood that the middle plate may also be a cast-formed plate, which is not specifically limited; then the formed intermediate plate may be cleaned.

502. Forming at least one frame member, the at least one frame member comprising an inner layer of the frame and an outer layer of the frame, the inner layer of the frame and the outer layer of the frame being a unitary structure, and the inner layer of the frame and the outer layer of the frame are different materials.

In the embodiment of the present application, the step of forming at least one frame member may include: forming the inner layer of the frame and the outer layer of the frame into a unitary structure by a rolling and thermal diffusion process; and obtaining at least one frame member by cutting the integrated structure. . That is, the sheet material forming at least one frame member is first processed, and the sheet material is connected into a unitary structure by at least two different materials, and specifically may be connected into a unitary structure by at least two different materials through a lamination and thermal diffusion process. Among them, the one-piece structure can be understood as a structure that has uniform appearance and size characteristics. It should be understood that the timing of

steps

501 and 502 is not limited, and steps 501 and 502 are optional steps.

Exemplarily, the material of the inner layer of the plate is abbreviated as A2 alloy, and the material of the outer layer is an appearance material, referred to as X material. The A2 alloy may include an aluminum alloy, a magnesium alloy, and/or a copper alloy, etc. The X material may include materials such as stainless steel, titanium alloy, and/or ceramic, and the X material and the A2 alloy may be joined into a one-piece structure by a lamination and thermal diffusion process. As shown in FIG. 6B, the detailed process of connecting the X material and the A2 alloy into a one-piece structure can be referred to the above-mentioned FIG. 3B, and details are not described herein again.

Alternatively, the thickness of the A2 alloy is greater than or equal to the thickness of the X material to minimize the weight of the product. For example, the thickness L1 of the inner layer of the frame may be between 2 mm and 10 mm. Specifically, the thickness L1 of the inner layer of the frame may be 6 mm, 8 mm, etc., which may be determined according to actual needs; the thickness L2 of the outer layer of the frame may be 0.1-2 mm. Specifically, the thickness L2 of the outer layer of the frame may be 0.8 mm, 0.6 mm, etc., and may be determined according to actual needs. Optionally, the mechanical strength of the X material is greater than the mechanical strength of the A2 alloy, wherein the mechanical strength may include hardness and strength, and the material density of the X material may be greater than the material density of the A2 alloy, wherein the strength may be yield strength, resistance Pull strength. That is, the frame of the structural member formed by the X material is relatively durable and resistant to falling.

The sheet is then blanked to obtain at least one frame member of a desired shape and size, and at least one frame member includes an inner layer of the frame and an outer layer of the frame, wherein the inner layer of the frame and the outer layer of the frame are already in a unitary structure within the frame The layer and the outer layer of the frame are different in material; at least one of the frame members can be cleaned. As shown in Fig. 6C, a schematic view of at least one frame member is obtained for blanking the sheet. Wherein, the blanking refers to the operation of removing a certain shape, quantity or quality of material from the whole or batch of materials after determining the shape, quantity or quality of the material required for making a certain equipment or product.

The number of frame members may be 1, 2, 3, or 4, etc., depending on actual needs. If it is a frame member, it can be a ring-shaped frame formed by stamping, which is matched with the middle plate; if it is at least 2, 3 or 4 frame members, it can be welded to the middle plate to form a frame. The shape of the frame coincides with the middle plate. It should be understood that the frame is used to form the bezel of the mobile terminal.

503. Connect the inner plate to the inner layer contact surface of the at least one frame member by welding to form a structural member.

In the embodiment of the present application, the middle plate and the inner layer of the frame of the at least one frame member are connected by welding, and may include: (1) passing the inner plate and the inner layer of the frame of the at least one frame member by friction stir welding, electron beam Welding, plasma welding or laser welding connection; or, (2) fixing at least one frame member to the middle plate to form a frame; connecting the inner surface of the frame to the intermediate plate by welding; or, (3) at least one The frame member is an annular frame member, and the inner plate and the inner layer contact surface of the at least one frame member are connected by welding, and may include: connecting the contact surface of the inner frame of the annular frame member with the middle plate by welding The ring frame is a stamped frame.

That is, at least one frame member and the middle plate can be firstly positioned by the jig, and the friction stir welding, electron beam welding, plasma welding or laser welding connection is used to form a unitary structure with high strength connection. As shown in FIG. 6D, a schematic view of welding for friction stir welding is performed, wherein the welding path is not limited to a straight path, but may be a curved path or the like. It should be understood that the welding may be completed once, that is, from the beginning to the end, or may be welded first, without welding, and then the welding portion is continuously welded, which is not limited. As shown in any of the above-mentioned FIGS. 4A-4O, several schematic diagrams of the structural members welded in one piece in the embodiment of the present application are not described herein. It should be noted that the melting point of the A1 alloy and the melting point of the A2 alloy are the same or similar. Specifically, the absolute value of the difference between the melting point of the A1 alloy and the melting point of the A2 alloy is less than a preset threshold, or the ratio of the melting point of the A1 alloy to the melting point of the A2 alloy is within a preset range, or the melting point of the A1 alloy and A2. Alloy The melting point exists in the same subset melting point interval. It should be understood that materials with similar melting points are more easily joined together by friction stir welding. The preset threshold and threshold range are both empirical values, which can be adjusted according to actual needs. For example, this preset threshold can be 300 ° C; preset range It can be between 0.5 and 1.5 (if the middle plate material and the inner layer material of the frame are all aluminum alloy, the melting point can be the same, the ratio is 1, between 0.5 and 1); the same subset melting point exists, for example: the melting point of the aluminum alloy The range may be: 450-660 ° C, the melting point of the magnesium alloy may be: 430-650 ° C, then, the same subset of melting points exist is 430-650 ° C.

Illustratively, the A1 alloy is an aluminum alloy, the melting point of the aluminum alloy may be 450-660 ° C, the A2 alloy is also an aluminum alloy, or a magnesium alloy, the melting point of the magnesium alloy may be 430-650 ° C, and the X material is stainless steel. The melting point of stainless steel can range from 1200 to 1550 °C.

When the material of the A1 alloy is aluminum alloy, the material of the A2 alloy is aluminum alloy, and the material of the X material is stainless steel, the X material can realize the appearance effect of the properties of the stainless steel material, and the melting points of the X material and the A2 alloy are greatly different, and can be rolled and The thermal diffusion process is connected, and then the melting points of the A1 alloy and the A2 alloy are similar, and it is easy to achieve high-strength connection by friction stir welding. Finally, a whole structure is formed, and the common structure of the whole structure such as CNC, NMT, surface treatment, PVD, etc. can be obtained. The structural part of the mobile terminal.

When the material of the A1 alloy is aluminum alloy, the material of the A2 alloy is aluminum alloy, and the material of the X material is titanium alloy, the X material can realize the appearance effect of the properties of the titanium alloy material, and the melting point of the X material and the A2 alloy are large, and can be stacked. The rolling and thermal diffusion processes are connected, and then the melting points of the A1 alloy and the A2 alloy are similar, and it is easy to achieve high-strength connection by friction stir welding. Finally, a whole structure is formed, and the whole structure can be subjected to common processes such as CNC, NMT, surface treatment, PVD, and the like. , get the structural parts of the mobile terminal.

If the material selected for the A2 alloy and the A1 alloy is an aluminum alloy, a magnesium alloy or a copper alloy, the heat dissipation of the product can be improved, the weight of the product can be reduced, and the difficulty of the CNC can be reduced and the processing cost can be reduced. Therefore, the melting point of the A1 alloy and the melting point of the A2 alloy are not much different, and the bonding strength by the friction stir welding connection is relatively high, and the dimensional deformation is relatively small. If the X material is stainless steel, the gloss effect of the properties of the stainless steel material can be achieved; if the material of the outer layer of the frame is titanium alloy, the gloss effect of the properties of the titanium alloy can be achieved; if the material of the outer layer of the frame is ceramic, the gloss effect of the ceramic property can be achieved. Meet the user's appearance requirements for the mobile terminal.

It should be understood that the number of frame members may be four frame members welded to the middle plate, or two, three or other number of frame members may be welded to the middle plate; or one side of the middle plate may be welded. The two-side welding connection; or the above-mentioned sheet material is formed into a ring frame or a ring-shaped frame by press forming, and the shape of the middle plate is matched with each other, and then welded to the middle plate, which is not limited. In a possible implementation, the contact surface of the middle plate and the inner layer of the frame can be welded completely, not by spacing welding, not by spot welding, or by welding of several connecting pieces, compared with the existing welded joints and Gluing, with very good mechanical properties, such as bonding, overall mechanical strength and so on. In another possible implementation manner, the contact surface between the middle plate and the inner layer of the frame can be fully welded by friction stir welding, and at least one welded keyhole can exist. It should be understood that in actual product applications, the welding keyhole can be used. To place the camera, antenna, etc., effectively use the space of the welding keyhole. For the description of the friction stir welding, reference may be made to the description shown in FIG. 3C above, and details are not described herein again.

Friction stir welding is difficult to join metals having a large difference in melting point (such as stainless steel and aluminum alloy), and the absolute value of the difference between the melting point of the middle plate (A1 alloy) and the melting point of the inner layer of the frame (A2 alloy) in the embodiment of the present application is smaller than Preset threshold, or the ratio of the melting point of the inner layer of the frame (A2 alloy) to the melting point of the middle plate (A1 alloy) is within a preset range, or within the frame The melting point of the layer (A2 alloy) has the same melting point interval as the melting point of the middle plate (A1 alloy). Therefore, in the present application, the bonding strength between the inner layer and the middle plate of the frame is relatively high by the friction stir welding, and the welding deformation is high. It is relatively small; it is beneficial to improve the reliability of the product, and is beneficial to the product structure design and processing precision control. The inner layer and the middle plate of the frame can form an integral connection.

The A1 alloy/A2 alloy may be selected from the group consisting of aluminum alloy/aluminum alloy, aluminum alloy/magnesium alloy, magnesium alloy/aluminum alloy, magnesium alloy/magnesium alloy, copper alloy/copper alloy, and the like. The combination of X material, A2 alloy and A1 alloy includes but is not limited to the following Table 1:

材料material	X材料X material	A2合金A2 alloy	A1合金A1 alloy
用途use	实现外观效果Achieve the appearance	用于和A1合金连接For connection to A1 alloy	中板(内腔)结构Medium plate (inner cavity) structure

组合1Combination 1	不锈钢stainless steel	铝合金Aluminum alloy	铝合金 Aluminum alloy

组合2Combination 2	不锈钢stainless steel	铝合金Aluminum alloy	镁合金 magnesium alloy

组合3Combination 3	不锈钢stainless steel	镁合金magnesium alloy	铝合金 Aluminum alloy

组合4Combination 4	不锈钢stainless steel	镁合金magnesium alloy	镁合金magnesium alloy
组合5Combination 5	不锈钢stainless steel	铜合金Copper alloy	铜合金Copper alloy
组合6Combination 6	钛合金Titanium alloy	铝合金Aluminum alloy	铝合金Aluminum alloy
组合7Combination 7	钛合金Titanium alloy	铝合金Aluminum alloy	镁合金magnesium alloy
组合8Combination 8	钛合金Titanium alloy	镁合金magnesium alloy	铝合金Aluminum alloy
组合9Combination 9	钛合金Titanium alloy	镁合金magnesium alloy	镁合金magnesium alloy
组合10Combination 10	钛合金Titanium alloy	铜合金Copper alloy	铜合金Copper alloy
组合11Combination 11	陶瓷材料Ceramic material	铝合金Aluminum alloy	铝合金Aluminum alloy
组合12Combination 12	陶瓷材料Ceramic material	铝合金Aluminum alloy	镁合金magnesium alloy
组合13Combination 13	陶瓷材料Ceramic material	镁合金magnesium alloy	铝合金Aluminum alloy
组合14Combination 14	陶瓷材料Ceramic material	镁合金magnesium alloy	镁合金magnesium alloy
组合15Combination 15	陶瓷材料Ceramic material	铜合金Copper alloy	铜合金Copper alloy

Table 1

It should also be noted that in the same structural member, the materials of the outer layer of the frame may be the same or different. For example: when the same, the outer layer material of the frame parts of all frame parts is made of stainless steel; when different, the outer layer material of the frame of the upper frame part and the lower frame part is made of stainless steel, and the outer layer material of the frame of the left frame part and the right frame part The titanium alloy is not specifically limited; or the material of the inner layer of the frame may be the same or different. For example: when the same, the inner layer material of all the frame members is aluminum alloy; when different, the inner layer material of the upper frame member and the lower frame member is aluminum alloy, and the inner layer material of the left frame member and the right frame member is For the magnesium alloy, the specifics are not limited.

In the embodiment of the present application, as shown in FIG. 6E, a schematic diagram of forging the integral structure formed by the at least one frame member and the intermediate plate may also be performed. That is, the integral structure of the high-strength connection can be formed into a preliminary contour of the appearance requirement by using a forging or stamping process, or it can be a preliminary contour of the subsequent machining forming into the appearance requirement. Further, through the common processes such as CNC, NMT, surface treatment, PVD, etc., the finished product processing is completed, as shown in the above 4P-4Q, which is a schematic diagram of the structural member processed.

In the embodiment of the present application, the middle plate and the at least one frame member are formed, and then the at least one frame member and the middle plate are passed By welding the joint, the structural part can be formed. Specifically, the structural member may include an inner layer of the frame and an outer layer of the frame, the inner layer material of the frame is an A2 alloy, and the outer layer material of the frame is an X material. The material of X and A2 alloy are different, and can be connected into a one-piece structure by stacking and thermal diffusion processes to realize the integral connection of dissimilar metals, and then the A2 alloy and the A1 alloy can be subjected to friction stir welding, electron beam welding, plasma welding or The laser welding technology is used for secondary connection to realize the high-strength integrated connection of dissimilar metals. The subsequent overall forging, CNC, NMT, forming, surface treatment and PVD processes form the appearance of stainless steel, titanium alloy or ceramics. Effect, the effect of the internal structure of materials such as aluminum alloy, magnesium alloy or copper alloy. The frame is used to form a frame of the mobile terminal, and the middle plate is located in the mobile terminal for supporting several devices of the mobile terminal. If the material of the A1 alloy and the A2 alloy is an aluminum alloy, the bonding strength by the friction stir welding connection is relatively high, and the heat dissipation property of the aluminum alloy can be improved due to the high thermal conductivity of the aluminum alloy; the density of the aluminum alloy is relatively low, and the product can be lowered. The weight and, in addition, the use of aluminum alloy for machinability, can also reduce processing costs. Moreover, the X material is stainless steel, titanium alloy, etc., and can achieve the appearance effect of stainless steel or titanium alloy.

It should be noted that, the embodiment of the present application further provides a method for manufacturing a mobile terminal, where the method includes any one of the foregoing embodiments shown in FIG. 5, and the mobile terminal is configured by using the structural component, and details are not described herein again. .

The foregoing is only a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present application. It should be covered by the scope of protection of this application. Therefore, the scope of protection of the present application should be determined by the scope of the claims.

Claims

A method of manufacturing a structural member of a mobile terminal, the method comprising:

Forming a middle plate;

Forming at least one frame member, wherein the frame member includes an inner layer of the frame and an outer layer of the frame, the outer layer of the frame being different from the material of the outer layer of the frame, the melting point of the material of the inner layer of the frame and the material of the middle plate The melting point is the same or similar, and the shape of the at least one frame member is adapted to the middle plate;

Forming a structural member by welding the middle plate and the inner layer contact surface of the at least one frame member, the at least one frame member forming a frame of the mobile terminal, the middle plate forming the mobile terminal Intermediate support plate.
The method of claim 1 wherein said step of forming at least one frame member comprises:

Forming the inner layer of the frame and the outer layer of the frame into a unitary structure by a rolling and thermal diffusion process;

The unitary structure is blanked to obtain the at least one frame member.
The method according to claim 1 or 2, wherein the step of connecting the intermediate plate to the inner layer contact surface of the at least one frame member by welding comprises:

Fixing the at least one frame member on the middle plate to form a frame;

The intermediate plate and the inner layer contact surface of the frame are joined by welding.
The method according to claim 1 or 2, wherein the at least one frame member is an annular frame member, and the inner panel and the inner layer contact surface of the at least one frame member are joined by welding, including:

The intermediate plate and the inner layer contact surface of the annular frame member are joined by welding, and the annular frame is a stamped frame.
The method according to any one of claims 1 to 4, wherein the step of connecting the intermediate plate to the inner layer contact surface of the at least one frame member by welding comprises:

The inner plate and the inner layer contact surface of the at least one frame member are joined by friction stir welding, electron beam welding, plasma welding or laser welding.
A method according to any one of claims 1 to 5, characterized in that

The material of the middle plate comprises an aluminum alloy, a magnesium alloy and/or a copper alloy;

The material of the inner layer of the frame includes the aluminum alloy, the magnesium alloy and/or the copper alloy;

The material of the outer layer of the frame comprises stainless steel, titanium alloy and/or ceramic.
A method according to any one of claims 1 to 6, wherein the thickness of the inner layer of the frame is greater than or equal to the thickness of the outer layer of the frame.
A method according to any one of claims 1 to 7, wherein the mechanical strength of the outer layer of the frame is greater than the mechanical strength of the inner layer of the frame.
The method according to any one of claims 1-8, wherein the melting point of the material of the inner layer of the frame is the same as or similar to the melting point of the medium plate material:

The absolute value of the difference between the melting point of the inner layer material of the frame and the melting point of the middle plate material is less than a preset threshold; or

The ratio of the melting point of the inner layer material of the frame to the melting point of the middle plate material is within a preset range; or

The melting point of the inner layer material of the frame and the melting point of the middle plate material have the same subset melting point interval.
Method according to any of claims 1-9, characterized in that the middle plate is a plate, solid type Materials, profiles of the opposite sex or hollow profiles.
A method of manufacturing a mobile terminal, wherein the method comprises:

Making the structural member by the method according to any one of claims 1 to 10;

The mobile terminal is composed of the structural members.
A mobile terminal, comprising: a structural component, the structural component comprising:

a middle plate and a frame, the frame is used to form a frame of the mobile terminal, and the middle plate is used to form an intermediate support plate of the mobile terminal;

The frame includes an inner layer of the frame and an outer layer of the frame, the inner layer of the frame and the outer layer of the frame being different in material;

The contact surface of the middle plate and the inner layer of the frame is connected by welding, and the melting point of the inner layer material of the frame is the same as or close to the melting point of the middle plate material.
The mobile terminal according to claim 12, wherein the inner layer of the frame and the outer layer of the frame are formed into a unitary structure by a lamination and thermal diffusion process.
The mobile terminal according to claim 12 or 13, wherein the contact surface of the middle plate and the inner layer of the frame is connected by friction stir welding, electron beam welding, plasma welding or laser welding.
A mobile terminal according to any one of claims 12-14, characterized in that

The material of the middle plate comprises an aluminum alloy, a magnesium alloy and/or a copper alloy;

The material of the inner layer of the frame includes the aluminum alloy, the magnesium alloy and/or the copper alloy;

The material of the outer layer of the frame comprises stainless steel, titanium alloy and/or ceramic.
A mobile terminal according to any one of claims 12 to 15, wherein the frame is a frame formed by joining at least one frame member to the intermediate plate by welding.
A mobile terminal according to any one of claims 12 to 16, wherein the frame is an annular frame formed by press forming.
The mobile terminal according to any one of claims 12-17, wherein the thickness of the inner layer of the frame is greater than or equal to the thickness of the outer layer of the frame.
A mobile terminal according to any one of claims 12 to 18, wherein the outer strength of the outer layer of the frame is greater than the mechanical strength of the inner layer of the frame.
The mobile terminal according to any one of claims 12 to 19, wherein an absolute value of a difference between a melting point of the inner layer material of the frame and a melting point of the intermediate plate material is less than a preset threshold, or The ratio of the melting point of the inner layer material of the frame to the melting point of the medium plate material is within a preset range, or the melting point of the inner layer material of the frame and the melting point of the medium plate material have the same subset melting point interval.
The mobile terminal according to any one of claims 12 to 20, wherein the middle plate is a plate material, a solid profile, an anisotropic profile or a hollow profile.