Processing method of composite metal shell, composite metal shell and electronic equipment

Abstract

The invention provides a machining method of a composite metal shell, the composite metal shell and electronic equipment, the machining method comprises the steps that a metal composite base material is provided, the metal composite base material comprises a first metal layer and a second metal layer which are stacked, the metal composite base material is provided with an inner surface and an outer surface, the first metal layer is located on one side of the inner surface, and the second metal layer is located on one side of the outer surface; the second metal layer is located on one side of the outer surface; deposition holes are formed from the inner surface to the interior of the metal composite base material; exhaust holes are formed from the side surface of the metal composite base material to the interior of the metal composite base material; depositing molten filling metal in the deposition hole to form a filling body; and removing part of the filling body and the second metal layer corresponding to the filling body to form a through hole, wherein the residual filling body coats the hole wall of the deposition hole to form a coating structure. According to the machining method, air is exhausted through the exhaust holes in the deposition process, the molten filling metal is good in fluidity and can fill the deposition holes, gaps can be prevented from occurring in the bottoms of the deposition holes, and the quality of the prepared composite metal shell is good.

Description

Technical Field

[0001] The present application relates to the technical field of metal processing, and in particular to a processing method of a composite metal shell, a composite metal shell and an electronic device. Background Art

[0002] When two metal materials are stacked and connected by hot melting, a deposition hole is usually first processed on the metal material located on the inside, and then liquid metal is deposited in the deposition hole. After cooling, the liquid metal material will become solid and accumulate layer by layer to fill the entire deposition hole. In the early stage of deposition, the liquid metal is affected by the tension of the metal at the bottom of the deposition hole, and its fluidity is insufficient, which will cause gaps at the bottom of the hole, thereby affecting the preparation quality of the composite metal shell. Summary of the invention

[0003] In view of the above, it is necessary to provide a processing method of a composite metal shell, a composite metal shell and an electronic device to improve the quality of the prepared composite metal shell.

[0004] In order to achieve the above objectives, in a first aspect, the present application discloses a method for processing a composite metal shell, comprising:

[0005] A metal composite substrate is provided, the metal composite substrate comprising a first metal layer and a second metal layer stacked, the metal composite substrate having an inner surface and an outer surface, the first metal layer being located on one side of the inner surface, and the second metal layer being located on one side of the outer surface;

[0006] forming a deposition hole from the inner surface to the inside of the metal composite substrate, wherein the deposition hole penetrates the first metal layer and extends into the second metal layer;

[0007] forming an exhaust hole from the side surface of the metal composite substrate into the metal composite substrate, wherein the exhaust hole is connected to the bottom of the deposition hole;

[0008] depositing molten filler metal in the deposition hole to form a filler body;

[0009] A portion of the filling body and the second metal layer corresponding to the filling body is removed to form a through hole, and the remaining filling body covers the hole wall of the deposition hole to form a covering structure.

[0010] As an optional embodiment, in an embodiment of the first aspect of the present invention, the side surface is connected between the inner surface and the outer surface, a bonding interface is provided between the first metal layer and the second metal layer, and an extension direction of the exhaust hole is parallel to the inner surface and passes through the bonding interface.

[0011] As an optional implementation, in an embodiment of the first aspect of the present invention, the deposition hole coincides with a central axis of the through hole, and a diameter of the deposition hole is larger than a diameter of the through hole.

[0012] As an optional implementation manner, in an embodiment of the first aspect of the present invention, the present invention further includes:

[0013] Part of the first metal layer and the second metal layer are removed from one side of the side surface so that the exhaust hole is removed to form a product reference surface, so that part of the surface of the coating structure is exposed from one side of the product reference surface.

[0014] As an optional implementation manner, in an embodiment of the first aspect of the present invention, the present invention further includes:

[0015] Part of the first metal layer, the second metal layer and part of the coating structure are removed from one side of the side surface so that the exhaust hole is removed to form a product reference surface, so that part of the surface of the coating structure is exposed from one side of the product reference surface.

[0016] As an optional implementation, in an embodiment of the first aspect of the present invention, the diameter of the deposition hole is 2.5 mm to 3.0 mm, and the diameter of the exhaust hole is 1.4 mm to 1.8 mm.

[0017] As an optional implementation, in an embodiment of the first aspect of the present invention, a central axis of the exhaust hole is perpendicular to a central axis of the deposition hole.

[0018] As an optional implementation, in an embodiment of the first aspect of the present invention, depositing molten filler metal in the deposition hole to form a filler body includes:

[0019] Extending a metal wire into the deposition hole, and arranging the metal wire coaxially with the deposition hole;

[0020] The metal wire is irradiated with a laser whose spot coincides with the center of the deposition hole, so that the metal wire is melted and filled in the deposition hole to form a filling body.

[0021] As an optional implementation, in an embodiment of the first aspect of the present invention, the processing method of the composite metal shell further includes:

[0022] Taking pictures to obtain an image of the deposition hole;

[0023] Determining the position of the light spot on the image and the position of the center of the deposition hole;

[0024] Based on the position of the light spot and the position of the center of the deposition hole being within a preset error range, it is determined that the light spot coincides with the center of the deposition hole.

[0025] In the second aspect, the present application discloses a composite metal shell, comprising a first metal layer and a second metal layer stacked together, wherein a deposition hole extending into the second metal layer is provided on a side of the first metal layer facing away from the second metal layer, and the hole wall of the deposition hole is coated with a coating structure, and a portion of the surface of the coating structure is exposed from one side of the composite metal shell.

[0026] As an optional implementation, in an embodiment of the second aspect of the present invention, the first metal layer includes an aluminum alloy, the second metal layer includes a titanium alloy, and the coating structure includes a titanium alloy.

[0027] In a third aspect, the present application discloses an electronic device, comprising the composite metal housing as described in the second aspect above.

[0028] In the above-mentioned processing method of the composite metal shell, the composite metal shell and the electronic device, a deposition hole is first formed from the inner surface of the metal composite substrate to the inside of the metal composite substrate, wherein the deposition hole penetrates the first metal layer and extends into the second metal layer, and then an exhaust hole is formed from the side surface of the metal composite substrate to the inside of the metal substrate, wherein the exhaust hole is connected to the bottom of the deposition hole, and then molten filling metal is deposited in the deposition hole to form a filling body, and finally a part of the filling body and the second metal layer corresponding to the filling body are removed to form a through hole, wherein the remaining filling body covers the hole wall of the deposition hole to form a covering structure. Since the exhaust is exhausted through the exhaust hole during the deposition process, the molten filling metal has better fluidity and can fill the deposition hole, which can avoid the appearance of gaps in part of the side wall at the bottom of the deposition hole, especially the gap between the filling body and the first metal layer, so that the quality of the prepared composite metal shell is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 A flow chart of a method for processing a composite metal shell proposed in an embodiment of the present application.

[0031] Figure 2 This is a schematic structural diagram of a metal composite substrate proposed in an embodiment of the present application.

[0032] Figure 3 for Figure 2 The schematic diagram of the structure after deposition holes are formed inside the metal composite substrate is shown.

[0033] Figure 4 for Figure 3 A schematic diagram of the structure after a filling body is formed in the deposition hole of the metal composite substrate is shown.

[0034] Figure 5 for Figure 4 The structure schematic diagram shown is a metal composite substrate after a portion of the filler and the second metal layer corresponding to the filler are removed to form a through hole.

[0035] Figure 6 for Figure 3 The schematic diagram of the cross-sectional structure of the metal composite substrate along the AA direction is shown.

[0036] Figure 7 for Figure 1 A flow chart of the steps of depositing molten filler metal in a deposition hole to form a filler body is shown.

[0037] Figure 8 Schematic diagram of the structure of the filling metal wire in the laser irradiation deposition hole.

[0038] Fig. 9 Flowchart of steps for determining the coincidence of the light spot with the center of the deposition hole.

[0039] Fig.10 The present invention is a flow chart of the method before the metal wire is inserted into the deposition hole.

[0040] Fig.11 It is a structural schematic diagram of the wire straightening device.

[0041] Fig.12 for Fig.11 The process diagram of the wire straightening device adjusting the straightness of the metal wire is shown.

[0042] Fig.13 A schematic diagram of the structure of the detection device.

[0043] Fig.14 Flow chart of the steps for the wire straightening device to adjust the straightness of the metal wire.

[0044] Fig.15 A flow chart of the steps for enabling a detection device to detect the straightness of an adjusted metal wire.

[0045] Fig.16 Flow chart of the method after the straightness of the wire meets the standard.

[0046] Fig.17 It is a schematic diagram of a structure for determining whether the projection of the filler wire on the test block coincides with the center of the test block.

[0047] Fig.18 is a top view of the test block.

[0048] Fig.19 The present invention is a flow chart of the method after the spot of the laser emitted by the laser is concentric with the metal wire.

[0049] Fig. 20 A flow chart of the steps of determining that the position of the laser is qualified based on whether the spot of the laser emitted by the laser toward the test metal plate meets the standard.

[0050] Fig.21 A schematic diagram of the structure of a composite metal shell proposed in an embodiment of the present application.

[0051] Main component symbols

[0052] Metal composite substrate 001

[0053] Side surface 000

[0054] Product reference surface 0001

[0055] First metal layer 011

[0056] The second metal layer 012

[0057] Inner surface 013

[0058] Outer surface 014

[0059] Sedimentation hole 015

[0060] Exhaust hole 016

[0061] Filling 017

[0062] Through hole 0171

[0063] Cladding structure 018

[0064] Combined interface 019

[0065] Composite metal shell 10

[0066] Metal wire 200

[0067] First end 210

[0068] Second end 220

[0069] Laser 300

[0070] Wire finishing device 400

[0071] Moving wheel assembly 410

[0072] Drive wheel 411

[0073] Adjustment Components 420

[0074] Adjustment 421

[0075] Detection device 500

[0076] Detection block 510

[0077] Detection hole 511

[0078] Test Block 600

[0079] Scale circle 610

[0080] Laser 700 DETAILED DESCRIPTION

[0081] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0082] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0083] The disclosure below provides many different embodiments or examples to realize different structures of the present invention. In order to simplify the disclosure of the present invention, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present invention. In addition, the present invention can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplicity and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides various specific examples of processes and materials, but those of ordinary skill in the art can be aware of the application of other processes and / or the use of other materials.

[0084] The following is a detailed description of various embodiments of the present invention in conjunction with the accompanying drawings.

[0085] See also Figure 1 The present application embodiment provides a method for processing a composite metal shell, comprising:

[0086] S10, such as Figure 2As shown, a metal composite substrate 001 is provided, which includes a first metal layer 011 and a second metal layer 012 stacked together. The metal composite substrate 001 has an inner surface 013 and an outer surface 014. The first metal layer 011 is located on one side of the inner surface 013, and the second metal layer 012 is located on one side of the outer surface 014.

[0087] The material of the first metal layer 011 includes an aluminum alloy, and the material of the second metal layer 012 includes titanium or a titanium alloy. It is understood that in other embodiments, the first metal layer 011 and the second metal layer 012 may also be other metals, which are not specifically limited here, wherein the hardness of the metal forming the first metal layer 011 is less than the hardness of the metal forming the second metal layer 012, and the second metal layer 012 has stronger chemical stability than the first metal layer 011.

[0088] S20, see Figure 3 A deposition hole 015 is formed from the inner surface 013 to the inside of the metal composite substrate 001 , and the deposition hole 015 penetrates the first metal layer 011 and extends into the second metal layer 012 .

[0089] In this embodiment, the deposition hole 015 is a cylindrical hole, and the deposition hole 015 has two sections, one of which is located in the first metal layer 011, and the other is located in the second metal layer 012. In other words, the deposition hole 015 needs to penetrate the first metal layer 011, and its bottom needs to be located in the second metal layer 012, so that the second metal layer 012 can be exposed from the bottom of the deposition hole 015. In some embodiments, the length of a section of the hole located in the first metal layer 011 along its axial direction is greater than the length of a section of the hole located in the second metal layer 012 along its axial direction.

[0090] S30 , forming an exhaust hole 016 from the side surface 000 of the metal composite substrate 001 into the metal composite substrate 001 , wherein the exhaust hole 016 is connected to the bottom of the deposition hole 015 .

[0091] The exhaust hole 016 is a circular hole, and the diameter of the exhaust hole 016 is smaller than the diameter of the deposition hole 015. It can be understood that in other embodiments, the exhaust hole 016 can be a square hole, but is not limited thereto.

[0092] S40, such as Figure 4 As shown, molten filler metal is deposited in the deposition hole 015 to form a filler body 017 .

[0093] The material of the filling metal may be the same as that of the second metal layer 012 , that is, the material of the filling metal is titanium or titanium alloy.

[0094] S50, such as Figure 5As shown, part of the filling body 017 and the second metal layer 012 corresponding to the filling body 017 are removed to form a through hole 0171 , and the remaining filling body 017 covers the hole wall of the deposition hole 015 to form a covering structure 018 .

[0095] In the processing method of the composite metal shell 10, a deposition hole 015 is first formed from the inner surface 013 of the metal composite substrate 001 to the inside of the metal composite substrate 001, wherein the deposition hole 015 penetrates the first metal layer 011 and extends into the second metal layer 012, and then an exhaust hole 016 is formed from the side surface 000 of the metal composite substrate 001 to the inside of the metal composite substrate 001, wherein the exhaust hole 016 is connected to the bottom of the deposition hole 015, and then a molten filling metal is deposited in the deposition hole 015 to form a filling body 017, and finally a portion of the filling body 017 is removed. 7 and the second metal layer 012 corresponding to the filler 017 to form a through hole 0171, wherein the remaining filler 017 covers the hole wall of the deposition hole 015 to form a covering structure 018. Since the gas is exhausted through the exhaust hole 016 during the deposition process, the exhaust hole 016 provides a channel for gas exhaust. The molten filler metal has good fluidity and can fill the deposition hole 015, which can avoid the appearance of gaps on the side walls of the bottom of the deposition hole 015, especially the gap between the filler 017 and the first metal layer 011, so that the quality of the prepared composite metal shell 10 is good. In addition, during the cooling and solidification of the molten metal, shrinkage stress will be generated. The exhaust hole 016 provides a way to release these stresses, reducing cracks or defects caused by stress concentration.

[0096] As an optional embodiment, the side surface 000 is connected between the inner surface 013 and the outer surface 014, a bonding interface 019 is provided between the first metal layer 011 and the second metal layer 012, and the extension direction of the vent 016 is parallel to the inner surface 013 and passes through the bonding interface 019. By making the extension direction of the vent 016 parallel to the inner surface 013, that is, the axis of the vent 016 is a straight line, the processing of the vent 016 can be facilitated; by making the vent 016 pass through the bonding interface 019, it is helpful to check and ensure the bonding quality between the first metal layer 011 and the second metal layer 012 during the formation of the vent 016.

[0097] Specifically, see Figure 6 A portion of the exhaust hole 016 is located in the first metal layer 011 , another portion of the exhaust hole 016 is located in the second metal layer 012 , a portion of the bottom of the exhaust hole 016 is located in the second metal layer 012 , and another portion of the bottom of the exhaust hole 016 is connected to the side wall of the deposition hole 015 .

[0098] It can be understood that in other embodiments, the extension direction of the exhaust hole 016 is parallel to the inner surface 013 and only penetrates the first metal layer 011 .

[0099] It can be understood that in other embodiments, the extension direction of the exhaust hole 016 is parallel to the inner surface 013 and only penetrates the second metal layer 012 .

[0100] As an optional implementation, the central axis of the deposition hole 015 coincides with the central axis of the through hole 0171, and the aperture of the deposition hole 015 is larger than the aperture of the through hole 0171. In this way, when a portion of the filling body 017 is removed, the thickness of the filling body 017 coated on the hole wall of the deposition hole 015 can be made uniform by drilling a hole at the central axis of the deposition hole 015 and forming the through hole 0171; and, the aperture of the deposition hole 015 is larger than the aperture of the through hole 0171, indicating that the hole wall of the deposition hole 015 is coated with the filling body 017, and the coated filling body 017 can prevent the first metal layer 011 from being exposed from the through hole 0171, thereby improving the air tightness of the overall structure.

[0101] As an optional embodiment, the processing method further includes:

[0102] Part of the first metal layer 011 and the second metal layer 012 are removed from the side surface 000 so that the exhaust hole 016 is removed to form a product reference surface 0001 , so that part of the surface of the coating structure 018 is exposed from the side of the product reference surface 0001 .

[0103] Among them, by precisely controlling the thickness of removing part of the first metal layer 011 and the second metal layer 012, the dimensional accuracy and surface quality of the product can be ensured; removing part of the first metal layer 011 and the second metal layer 012 and forming the product reference surface 0001 helps to enhance the structural integrity of the final product and improve its reliability in practical applications.

[0104] As an optional embodiment, the processing method further includes:

[0105] Part of the first metal layer 011 , the second metal layer 012 and part of the coating structure 018 are removed from the side surface 000 so that the exhaust hole 016 is removed to form the product reference surface 0001 , so that part of the surface of the coating structure 018 is exposed from the side of the product reference surface 0001 .

[0106] Among them, by precisely controlling the thickness of removing part of the first metal layer 011, the second metal layer 012 and part of the coating structure 018, the dimensional accuracy and surface quality of the product can be ensured; removing part of the first metal layer 011, the second metal layer 012 and part of the coating structure 018 and forming a product reference surface 0001 helps to enhance the structural integrity of the final product and improve its reliability in practical applications.

[0107] As an optional embodiment, the diameter of the deposition hole 015 is 2.5 mm to 3.0 mm, and the diameter of the exhaust hole 016 is 1.4 mm to 1.8 mm. When the filling body 017 is formed in the deposition hole 015, the smaller exhaust hole 016 can effectively exhaust the gas, reduce the bubbles in the hole, and ensure good contact between the filling metal and the hole wall, thereby improving the quality and structural integrity of the filling body 017; the larger deposition hole 015 is conducive to the flow and filling of the molten metal, and the exhaust hole 016 provides the necessary channel so that the gas can be smoothly discharged during the filling process to avoid the formation of bubbles or voids in the filling body 017; in the metal composite substrate 001, the design of the deposition hole 015 and the exhaust hole 016 helps to control the metal flow and gas exhaust during the processing, thereby improving the structural stability and mechanical properties of the final product; the larger deposition hole 015 can provide sufficient space when removing part of the filling body 017 to avoid excessive removal, while ensuring that the formation of the through hole 0171 does not affect the overall structure of the substrate.

[0108] As an optional embodiment, the central axis of the exhaust hole 016 is perpendicular to the central axis of the deposition hole 015. The vertical exhaust hole 016 can provide a direct and effective gas exhaust path, which helps to quickly exhaust the gas and impurities in the hole when the molten metal fills the deposition hole 015, reduce the formation of bubbles, thereby improving the quality of the filling body 017 and the density of the metal in the hole, and helps to reduce the defects that may be generated during the metal filling process; the exhaust hole 016 may need to be closed or removed after the metal filling body 017 solidifies, and the vertical design facilitates these subsequent processing steps. For example, the exhaust hole 016 can be closed by filling, welding or other methods to ensure the integrity and performance of the product.

[0109] As an alternative implementation, see Figure 7 , depositing molten filling metal in the deposition hole 015 to form a filling body 017, including:

[0110] S41, see Figure 8 , extend the metal wire 200 into the deposition hole 015, and arrange the metal wire 200 coaxially with the deposition hole 015.

[0111] S42 , using the laser 300 whose spot coincides with the center of the deposition hole 015 to irradiate the metal wire 200 , so that the metal wire 200 melts and fills the deposition hole 015 to form a filling body 017 .

[0112] Among them, the filling metal wire can be produced by a wire producing machine (not shown in the figure), and the coaxiality of the metal wire 200 and the deposition hole 015 ensures the precise positioning of the metal wire 200 in the deposition hole 015, so that the energy of the laser 300 can be concentrated on the tip of the metal wire 200, thereby realizing precise control of the molten metal filling; the laser 300 irradiation can make the metal wire 200 melt quickly, reduce the heat affected zone, thereby improving the quality and structural integrity of the filling body 017; since the laser 300 can quickly melt the metal wire 200, rapid filling can be achieved, and the closure of the gas in the hole during the filling process can be reduced, thereby reducing the formation of bubbles and improving the density of the filling body 017. Compared with the traditional filling method, the production efficiency can be significantly improved; and the laser 300 melting filling can optimize the microstructure of the filling body 017, thereby improving its mechanical properties and corrosion resistance.

[0113] As an alternative implementation, see Fig. 9 , the processing method of the composite metal shell 10 also includes:

[0114] S421 , photographing and acquiring an image of the deposition hole 015 .

[0115] The image of the deposition hole 015 captured by a CCD camera can be used to analyze the size, shape and position of the deposition hole 015 to ensure the accuracy of subsequent laser processing.

[0116] S422 , determining the position of the light spot on the image and the position of the center of the deposition hole 015 .

[0117] The image processing technology can be used to determine the exact position of the laser spot on the image. At the same time, the position of the center of the deposition hole 015 also needs to be determined so as to accurately align the laser spot to the center of the deposition hole 015 .

[0118] S423 , based on the position of the light spot and the position of the center of the deposition hole 015 being within a preset error range, determining that the light spot coincides with the center of the deposition hole 015 .

[0119] In order to ensure the precise alignment of the laser irradiation, the position of the laser irradiation is adjusted by comparing the position of the spot and the center position of the deposition hole 015 so that it coincides with the center of the deposition hole 015 or is within an acceptable error range. It can be understood that the preset error range defines the maximum deviation allowed when the laser spot is aligned with the center of the deposition hole 015, and this deviation range needs to be set according to specific processing requirements and material properties. The preset error range can be ±0.05mm.

[0120] Through the above steps, the accuracy and quality of the filling process can be improved, ensuring that the metal wire can be accurately melted in the deposition hole 015 and form a uniform and dense filling body 017; by precisely controlling the position of laser irradiation, defects in the processing process such as bubbles, incomplete filling or over-melting can be reduced, thereby improving the performance and reliability of the final product. In addition, this precise alignment technology can also improve production efficiency, reduce material waste, and potentially extend the service life of processing equipment.

[0121] For further information, see Fig.10 Before extending the metal wire into the deposition hole 015, the method further comprises:

[0122] S411, use a wire straightening device to adjust the straightness of the metal wire.

[0123] Among them, by adjusting the straightness of the metal wire, it can be ensured that the metal wire has good straightness before extending into the deposition hole 015, that is, the metal wire is straight without obvious bending or twisting; and, good straightness can reduce the resistance of the metal wire during transportation in the deposition hole 015, ensuring that the metal wire 200 can smoothly enter the deposition hole 015.

[0124] S412, using a detection device to detect the straightness of the adjusted metal wire.

[0125] Among them, the function of the detection device is to verify whether the metal wire has reached the required straightness standard after adjustment. Through detection, it can ensure that the quality of the metal wire meets the processing requirements and avoid problems such as uneven filling, poor contact with the hole wall or inaccurate laser irradiation caused by bending or twisting of the metal wire.

[0126] Through the above steps, the accuracy and quality of the filling process can be improved, ensuring that the metal wire can be accurately melted and filled into the deposition hole 015; by ensuring the straightness of the metal wire, the defects that may occur during the filling process, such as bubbles, incomplete filling or over-melting, can be reduced, thereby improving the performance and reliability of the final product. In addition, this control of the straightness of the metal wire can also improve production efficiency, reduce material waste, and potentially extend the service life of the processing equipment; by accurately controlling the quality of the metal wire, the stability and consistency of the laser processing process can be ensured, thereby obtaining a better filling effect.

[0127] Among them, see Fig.11 and Fig.12 The wire straightening device 400 includes a driving wheel assembly 410 and an adjusting assembly 420 arranged side by side. The driving wheel assembly 410 includes n driving wheels 411 arranged at intervals. The adjusting assembly 420 includes (n-1) adjusting members 421 arranged at intervals. The n driving wheels 411 and the (n-1) adjusting members 421 are arranged alternately. See Fig.14The step of enabling the wire straightening device 400 to adjust the straightness of the metal wire 200 includes:

[0128] S411A, making the metal wire 200 abut against n moving wheels 411 , wherein the metal wire 200 includes a first end 210 and a second end 220 opposite to each other.

[0129] S411B, see Fig.12 A in the figure makes the adjusting member 421 corresponding to the first end 210 among the (n-1) adjusting members 421 move toward the moving wheel assembly 410 and abut against the first end 210, so that the second end 220 moves a first distance (such as Fig.12 (as shown in B in the figure).

[0130] S411C, another adjusting member 421 of the (n-1) adjusting members 421 is moved toward the moving wheel assembly 420 and abuts against the metal wire 200, so that the second end 220 moves a first distance (such as 0.001mm) in a second direction opposite to the first direction. Fig.12 as shown in C in the figure).

[0131] S411D, see Fig.12 The remaining adjusting members 421 of the (n-1) adjusting members 421 are moved toward the moving wheel assembly 410 and abut against the metal wire 200 to adjust the straightness of the metal wire 200 .

[0132] Specifically, n is 4. There are two wire straightening devices 400, and the two wire straightening devices 400 are arranged at intervals in the vertical direction. Fig.12 , the two wire straightening devices 400 operate in sequence, and each wire straightening device 400 operates in sequence according to the steps S411A-S411D to adjust the straightness of the filler wire 200. It can be understood that when the second wire straightening device 400 is in operation, the first adjustment member 421 is moved and slightly abutted, so that the second end 220 of the filler wire 200 is slightly displaced toward the third direction; the second adjustment member 421 is moved and slightly abutted, so that the second end 220 of the filler wire 200 is displaced toward the fourth direction opposite to the third direction, so as to further adjust and correct the straightness of the filler wire 200; the remaining adjustment members 421 are moved and slightly abutted, so that the filler wire 200 can be finely adjusted.

[0133] In the above steps, by moving and slightly abutting the first adjusting member 421, a force can be applied to the first end 210 of the metal wire 200, so that the second end 220 thereof is slightly displaced in the first direction; by moving and slightly abutting the second adjusting member 421, the second end 220 of the metal wire 200 can be displaced in the second direction opposite to the first direction, so as to further adjust and correct the straightness of the metal wire 200; by moving and slightly abutting the remaining adjusting members 421, the metal wire 200 can be finely adjusted to ensure that the straightness of the entire metal wire 200 meets the requirements. By the coordinated work of the moving wheel assembly 410 and the adjusting assembly 420, the metal wire 200 can be accurately adjusted to ensure its smooth transportation and accurate filling in the deposition hole 015.

[0134] Among them, see Fig.13 The detection device 500 includes a detection block 510, and a detection hole 511 is opened on the detection block 510. Fig.15 The step of enabling the detection device 500 to detect the straightness of the adjusted metal wire 200 includes:

[0135] S412A, passing the metal wire 200 through the detection hole 511 of the detection block 510 multiple times;

[0136] S412B, based on the fact that the metal wire 200 does not contact the hole wall of the detection hole 511, confirm that the straightness of the metal wire 200 meets the standard.

[0137] Specifically, the metal wire 200 can be passed through the detection hole of the detection block three times in a row. The diameter of the detection hole is 1.5 mm-2 mm. The length of the metal wire can be 200 mm.

[0138] In the above steps, the straightness of the metal wire 200 is tested by passing it through a detection hole 511 having a specific size and shape. The detection hole 511 is usually designed to simulate certain characteristics of the actual deposition hole 015, or to provide a standardized detection environment. If the metal wire 200 does not touch the hole wall when passing through the detection hole 511, it indicates that the straightness of the metal wire 200 meets the requirements, that is, the metal wire 200 maintains good centering during the passing process without deviation or bending. This can be a final confirmation of the straightness of the metal wire 200 to ensure that it can be accurately guided and positioned in the subsequent deposition process.

[0139] The middle of the laser is connected to one end of the metal wire 200, that is, the laser is bound to the metal wire 200. Fig.16 After the straightness of the metal wire meets the standard, the method further comprises:

[0140] S401, see Fig.17, place the test block 600 in the first position.

[0141] S402 , the laser 700 is made to emit the laser 300 toward the center of the test block 600 .

[0142] Among them, see Fig.18 The surface of the test block 600 is provided with a plurality of concentric scale circles 610, and the diameters of the plurality of scale circles 610 may be 1 mm, 2 mm, 3 mm, 4 mm, and 5 mm, respectively. By emitting the laser 300 toward the center of the test block 600, the situation where the laser 700 is aligned with the deposition hole 015 in actual work can be simulated.

[0143] S403 , based on the light spot 310 of the laser 300 emitted by the laser 700 being located at the center of the test block 600 , the test block 600 is moved toward the laser 700 by a second distance to a second position.

[0144] Among them, the second distance is 5 mm.

[0145] S404 , determining whether the light spot 310 of the laser 300 emitted by the laser 700 is located at the center of the test block 600 .

[0146] The position of the light spot 310 is confirmed again to ensure that the light spot 310 is still aligned with the center after the test block 600 moves.

[0147] S405, based on the fact that the spot 310 of the laser 300 emitted by the laser 700 is located at the center of the test block 600, the test block 600 is moved a second distance away from the laser 700 to the first position, and it is determined again whether the spot 310 of the laser 300 emitted by the laser 700 is located at the center of the test block 600.

[0148] By repeating the alignment process, the stability of the laser 700 and the accuracy of the alignment can be verified.

[0149] S406 , based on the spot 310 of the laser 300 emitted by the laser 700 being located at the center of the test block 600 again, the metal wire 200 is moved toward the center of the test block 600 , and it is determined whether the projection of the metal wire 200 on the test block 600 coincides with the center of the test block 600 .

[0150] The concentricity between the metal wire 200 and the spot 310 of the laser 300 is checked by the projection of the metal wire 200 , so as to ensure that the metal wire 200 is located at the center of the laser 300 irradiation.

[0151] S407 , based on the projection of the metal wire 200 on the test block 600 coinciding with the center of the test block, determining that the light spot 310 of the laser 300 emitted by the laser 700 is concentric with the metal wire 200 .

[0152] By finally confirming the concentricity between the metal wire 200 and the spot 310 of the laser 300 , it can be ensured that the energy of the laser 300 is effectively transferred to the metal wire 200 .

[0153] Among them, see Fig.19 After the spot 310 of the laser 300 emitted by the laser 700 is concentric with the metal wire 200, the method further comprises:

[0154] S408 , making the laser 700 emit laser light toward a test metal plate (not shown), wherein the distance between the test metal plate and the laser 700 is equal to the distance between the bottom of the deposition hole 015 and the laser 700 .

[0155] Among them, by using a test metal plate at the same distance from the deposition hole 015 to simulate the actual processing conditions, it can be ensured that the positioning of the laser 700 in actual work and the quality of the spot 310 are consistent with the test conditions.

[0156] S409 , based on the fact that the spot of the laser 300 emitted by the laser 700 toward the test metal plate meets the standard, it is determined that the position of the laser 300 is qualified.

[0157] Among them, if the position and quality of the light spot 310 on the test metal plate meet the predetermined standards, this indicates that the position of the laser 700 is correct, which can ensure that the laser 700 can accurately irradiate the metal wire 200 and the deposition hole 015 during the actual deposition process. This step is the final confirmation of the positioning of the laser 700, ensuring the accuracy and repeatability of the laser 300 processing process.

[0158] Among them, see Fig. 20 Based on the fact that the spot 310 of the laser 300 emitted by the laser 700 toward the test metal plate meets the standard, the steps of determining whether the position of the laser 700 is qualified include:

[0159] S4091, detecting the color and / or shape and / or size of the light spot 310 of the laser 300 emitted by the laser 700 toward the test metal plate.

[0160] S4092, based on the color and / or shape and / or size of the spot 310 of the laser light 300 emitted by the laser 700 toward the test metal plate, determine whether the spot 310 of the laser light 300 emitted by the laser 700 toward the test metal plate meets the standard.

[0161] S4093, based on the fact that the spot 310 of the laser 300 emitted by the laser 700 toward the test metal plate meets the standard, it is determined that the position of the laser 700 is qualified.

[0162] In the above steps, the detection of color and / or shape and / or size is part of the quality control, which ensures the accuracy and consistency of the laser 300 processing process and avoids processing defects; by detecting the color and / or shape and / or size of the light spot 310, it can be ensured that the laser 700 is accurately aligned with the metal wire.

[0163] See also Fig.21 The embodiment of the present application further discloses a composite metal shell 10, comprising a first metal layer 011 and a second metal layer 012 which are stacked, wherein a deposition hole 015 extending into the second metal layer 012 is provided on a side of the first metal layer 011 which is away from the second metal layer 012, and a hole wall of the deposition hole 015 is coated with a coating structure 018, and a portion of the surface of the coating structure 018 is exposed from one side of the composite metal shell 10.

[0164] As an optional implementation, the first metal layer 011 includes an aluminum alloy, the second metal layer 012 includes a titanium alloy, and the cladding structure 018 includes a titanium alloy.

[0165] The embodiment of the present application also discloses an electronic device including the composite metal housing 10 as described above. The electronic device may be, but is not limited to, a mobile phone, a tablet computer, a laptop computer, a smart watch, a monitor, and the like.

[0166] It is obvious to those skilled in the art that the present application is not limited to the details of the exemplary embodiments described above, and that the present application can be implemented in other specific forms without departing from the spirit or essential features of the present application. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present application is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present application.

[0167] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present application and are not intended to limit it. Although the present application has been described in detail with reference to the preferred embodiments, a person of ordinary skill in the art should understand that the technical solution of the present application may be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present application.

Claims

1. A method for processing a composite metal shell, characterized in that: include: A metal composite substrate is provided, the metal composite substrate comprising a first metal layer and a second metal layer stacked, the metal composite substrate having an inner surface and an outer surface, the first metal layer being located on one side of the inner surface, and the second metal layer being located on one side of the outer surface; forming a deposition hole from the inner surface to the inside of the metal composite substrate, wherein the deposition hole penetrates the first metal layer and extends into the second metal layer; forming an exhaust hole from the side surface of the metal composite substrate into the metal composite substrate, wherein the exhaust hole is connected to the bottom of the deposition hole; depositing molten filler metal in the deposition hole to form a filler body; A portion of the filling body and the second metal layer corresponding to the filling body is removed to form a through hole, and the remaining filling body covers the hole wall of the deposition hole to form a covering structure.

2. The method for processing a composite metal shell according to claim 1, characterized in that: The side surface is connected between the inner surface and the outer surface, a bonding interface is provided between the first metal layer and the second metal layer, and an extension direction of the exhaust hole is parallel to the inner surface and passes through the bonding interface.

3. The method for processing a composite metal shell according to claim 1, characterized in that: The deposition hole coincides with a central axis of the through hole, and a diameter of the deposition hole is larger than a diameter of the through hole.

4. The method for processing a composite metal shell according to claim 1, characterized in that: Also includes: Part of the first metal layer and the second metal layer are removed from one side of the side surface so that the exhaust hole is removed to form a product reference surface, so that part of the surface of the coating structure is exposed from one side of the product reference surface.

5. The method for processing a composite metal shell according to claim 1, characterized in that: Also includes: Part of the first metal layer, the second metal layer and part of the coating structure are removed from one side of the side surface so that the exhaust hole is removed to form a product reference surface, so that part of the surface of the coating structure is exposed from one side of the product reference surface.

6. The method for processing a composite metal shell according to claim 1, characterized in that: The diameter of the deposition hole is 2.5 mm to 3.0 mm, and the diameter of the exhaust hole is 1.4 mm to 1.8 mm.

7. The method for processing a composite metal shell according to claim 1, characterized in that: A central axis of the exhaust hole is perpendicular to a central axis of the deposition hole.

8. The method for processing a composite metal shell according to claim 1, characterized in that: The step of depositing molten filler metal in the deposition hole to form a filler body comprises: Extending a metal wire into the deposition hole, and arranging the metal wire coaxially with the deposition hole; The metal wire is irradiated with a laser whose spot coincides with the center of the deposition hole, so that the metal wire is melted and filled in the deposition hole to form a filling body.

9. The method for processing a composite metal shell according to claim 8, characterized in that: The processing method of the composite metal shell also includes: Taking pictures to obtain an image of the deposition hole; Determining the position of the light spot on the image and the position of the center of the deposition hole; Based on the position of the light spot and the position of the center of the deposition hole being within a preset error range, it is determined that the light spot coincides with the center of the deposition hole.

10. A composite metal shell, characterized in that: It comprises a first metal layer and a second metal layer which are stacked, wherein a deposition hole extending into the second metal layer is provided on a side of the first metal layer facing away from the second metal layer, a hole wall of the deposition hole is covered with a coating structure, and a part of the surface of the coating structure is exposed from one side of the composite metal shell.

11. The composite metal shell according to claim 10, characterized in that: The first metal layer includes an aluminum alloy, the second metal layer includes a titanium alloy, and the cladding structure includes a titanium alloy.

12. An electronic device, characterized in that: The invention comprises a main body and a composite metal shell as claimed in claim 10 or 11, wherein the main body is arranged on the composite metal shell.

Images