Mobile phone frames and the method of manufacturing these mobile phone frames.

Abstract

The invention relates to a mobile phone frame and a method for producing such a frame, and relates to the technical field of mobile phone accessories. The mobile phone frame consists of a composite plate, which encloses a compartment for holding a mobile phone. This composite plate consists of a first plate and a second plate. The first side of the first plate is textured, and the first side of the second plate and the first side of the first plate are rolled together. The textures, such that adjacent textures have a spacing of 0.005 mm to 0.03 mm, account for more than 90% of all textures. According to the mobile phone frame proposed in the invention scheme, the first side of the first plate is roughened to create textures, increasing the surface area of ​​the first plate, and the second plate is rolled, so that the composite plate produced by combining the first and second plates has higher bonding strength, thereby ensuring that the mobile phone frame is more robust.

Description

Mobile phone frame and manufacturing method Technical Field

[0001] The present invention relates to the technical field of mobile phone accessories, and in particular to a mobile phone frame and a manufacturing method thereof. Background Art

[0002] With the advent of the smart phone era, demand for mobile phones has greatly increased. To attract more consumers, mobile phone manufacturers are racking their brains to innovate and design various components. As a component of mobile phones, the mobile phone frame has also undergone many twists and turns in the production process of various process verification and method trials. The processing process is extremely critical, and the process used directly affects the yield rate and production efficiency.

[0003] Steel / aluminum composite panels combine the high strength and good plasticity of steel with the excellent electrical and thermal conductivity, corrosion resistance, and low density of aluminum. They are used in rail transit applications such as subway contact rails, automobile and high-speed train body materials, and engine bearings. Utilizing aluminum's excellent thermal conductivity, a variety of steel / aluminum composite heat sinks and cookware have been introduced. Furthermore, steel / aluminum composite panels are widely used in many fields, including machinery, shipbuilding, nuclear energy, and electricity. With the development of smartphones and 5G technology, steel / aluminum composite panels, due to their unique properties, are also being used in the production of smartphone frames.

[0004] However, due to the significant differences in material properties (deformation resistance, plasticity, thermal conductivity, melting point, etc.) between steel and aluminum, the production of steel-aluminum composite frames is somewhat challenging. During the rolling process of the steel / aluminum composite frame, the combination of the two different materials, steel and aluminum, makes it difficult to achieve a high bond strength after rolling.

[0005] Summary of the Invention

[0006] The present invention provides a mobile phone frame, which is used to solve the problem of low bonding strength of mobile phone frames in the prior art.

[0007] The present invention provides a mobile phone frame, comprising:

[0008] A composite plate, the composite plate enclosing a storage space for accommodating a mobile phone, the composite plate comprising a first plate body and a second plate body, stripes formed on the first side of at least one of the first plate body and the second plate body, the first side of the second plate body being rolledly connected to the first side of the first plate body, and the stripes wherein the distance between two adjacent stripes is 0.005-0.03 mm account for greater than 90% of the total number of stripes.

[0009] According to a mobile phone frame provided by an embodiment of the present invention, a groove is provided on a side of the composite plate facing the accommodating space, and the groove extends along the length direction of the composite plate.

[0010] According to an embodiment of the present invention, a mobile phone frame is provided, which includes two composite panels, a first bending portion bent toward one side of the accommodating space is formed at the first end of the composite panel, and a second bending portion bent toward one side of the accommodating space is formed at the second end of the composite panel, and the two composite panels are connected by the first bending portion and the second bending portion.

[0011] According to a mobile phone frame provided by an embodiment of the present invention, the stripes with a distance between two adjacent stripes of 0.01-0.02 mm account for more than 90% of the total number of stripes.

[0012] According to a mobile phone frame provided by an embodiment of the present invention, the stripes with a distance between two adjacent stripes of 0.01-0.02 mm account for more than 80% of the total number of stripes.

[0013] According to a mobile phone frame provided by an embodiment of the present invention, the stripes with a distance between two adjacent stripes of 0.01-0.02 mm account for more than 70% of the total number of stripes.

[0014] According to a mobile phone frame provided by an embodiment of the present invention, the stripes with a distance between two adjacent stripes of 0.01-0.02 mm account for more than 50% of the total number of stripes.

[0015] According to a mobile phone frame provided by an embodiment of the present invention, the roughness of the first side surface of the first plate is 0.8-4.0 Ra.

[0016] According to a mobile phone frame provided by an embodiment of the present invention, the roughness of the first side surface of the second plate is 4-10 Ra.

[0017] According to a mobile phone frame provided by an embodiment of the present invention, the hardness of the first plate is greater than the hardness of the second plate.

[0018] According to a mobile phone frame provided by an embodiment of the present invention, the first plate body is a stainless steel plate, and the second plate body is an aluminum plate.

[0019] According to a mobile phone frame provided by an embodiment of the present invention, the shear strength of the composite plate is τ=a*b*K1*K2*σ 软, a is the length of the first plate, b is the width of the first plate, K1 is the gross area ratio of the first plate, and the value range of K1 is 1.5-3; K2 is the bonding ratio of the first plate and the second plate, and the value range of K2 is 0.15-0.3. When K1*K2>1, the product of K1 and K2 is 1; the σ 软 is the yield strength of the second plate, σ 软 The value range is 350-412Mpa.

[0020] According to a mobile phone frame provided by an embodiment of the present invention, the first plate is in a long strip shape, and a length direction of the stripes forms a preset angle with a width direction of the first plate.

[0021] The present invention also provides a method for manufacturing a mobile phone frame, the manufacturing method comprising the following steps:

[0022] Performing a roughening treatment on the first side surface of the first plate body and / or the first side surface of the second plate body;

[0023] Asynchronously rolling the first plate body and the second plate body to obtain a composite plate;

[0024] Bending the composite plate;

[0025] The bent composite plate is welded to obtain a mobile phone frame.

[0026] According to a method for manufacturing a mobile phone frame provided by an embodiment of the present invention, the step of roughening the first side surface of the first plate body and / or the first side surface of the second plate body includes:

[0027] rubbing the first side surface of the first plate body and / or the first side surface of the second plate body by a texturing friction roller to form stripes;

[0028] Debris on the surface of the first plate and / or the second plate is removed.

[0029] According to a method for manufacturing a mobile phone frame provided by an embodiment of the present invention, after performing the step of removing debris from the surface of the first plate and / or the second plate, the following steps are further performed:

[0030] Obtaining the number of fringes per unit area on the first side surface of the first plate or the first side surface of the second plate;

[0031] It is determined that the number of stripes per unit area on the first side surface of the first plate body or the first side surface of the second plate body is less than a corresponding preset value, and the lifting component is controlled to increase the height of the texturing friction roller.

[0032] According to a method for manufacturing a mobile phone frame provided by an embodiment of the present invention, the step of asynchronously rolling the first plate and the second plate includes:

[0033] heating the first plate and the second plate;

[0034] The heated first plate and the second plate are asynchronously rolled to connect the first side surface of the second plate to the first side surface of the first plate to form the composite plate.

[0035] According to a method for manufacturing a mobile phone frame provided by an embodiment of the present invention, after performing the step of asynchronously rolling the heated first plate and the second plate, the following steps are further performed:

[0036] performing a solution treatment on the composite plate;

[0037] The composite plate after the solution treatment is subjected to aging treatment.

[0038] According to a method for manufacturing a mobile phone frame provided by an embodiment of the present invention, the solution temperature of the solution treatment is 480-540°C, and the solution time of the solution treatment is 45-65 minutes; the aging temperature of the aging treatment is 160-200°C, and the aging time of the aging treatment is 5-7 hours.

[0039] According to a method for manufacturing a mobile phone frame provided by an embodiment of the present invention, the thickness ratio of the first plate body to the second plate body is 1.5:1.0, the speed ratio of the rolling roller corresponding to the first plate body and the rolling roller corresponding to the second plate body is 1:1.05, and the rolling reduction rate of the asynchronous rolling is 20%-40%.

[0040] According to a method for manufacturing a mobile phone frame provided by an embodiment of the present invention, before performing the step of bending the composite plate, the following steps are further performed:

[0041] The composite plate is straightened.

[0042] According to a method for manufacturing a mobile phone frame provided by an embodiment of the present invention, the step of straightening the composite plate includes:

[0043] performing thickness-direction straightening treatment on the composite plate;

[0044] The composite plate is straightened in the width direction.

[0045] According to a method for manufacturing a mobile phone frame provided by an embodiment of the present invention, before performing the step of welding the composite plate after the bending process, the following steps are further performed:

[0046] The composite plate after the bending process is sheared.

[0047] The mobile phone frame provided in an embodiment of the present invention forms stripes on the first side of the first plate by roughening the first side of the first plate, thereby increasing the area when the first plate and the second plate are rolled, so that the bonding strength of the composite plate formed after the first plate and the second plate are combined is higher, thereby ensuring that the mobile phone frame is more firmly bonded. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction is given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0049] FIG1 is a schematic structural diagram of a first plate body provided in an embodiment of the present invention;

[0050] FIG2 is a schematic diagram of the cross-sectional structure of a composite plate provided in an embodiment of the present invention;

[0051] FIG3 is a schematic diagram of a partially enlarged structure of point A in FIG2 provided by an embodiment of the present invention;

[0052] FIG4 is a schematic structural diagram of a mobile phone frame provided by an embodiment of the present invention;

[0053] FIG5 is a schematic structural diagram of a composite plate provided in an embodiment of the present invention after being bent;

[0054] FIG6 is a schematic diagram of the structure of a composite plate texturing device according to an embodiment of the present invention;

[0055] FIG7 is a second structural schematic diagram of a composite plate texturing device according to an embodiment of the present invention;

[0056] FIG8 is a schematic diagram of a process for manufacturing a mobile phone frame according to an embodiment of the present invention;

[0057] FIG9 is a schematic diagram showing one principle of bending of a composite plate according to an embodiment of the present invention;

[0058] FIG10 is a second schematic diagram of the principle of bending a composite plate according to an embodiment of the present invention;

[0059] FIG11 is a third schematic diagram of the principle of bending a composite plate according to an embodiment of the present invention;

[0060] FIG12 is a fourth schematic diagram of the principle of bending a composite plate according to an embodiment of the present invention;

[0061] FIG13 is a fifth schematic diagram of the principle of bending a composite plate according to an embodiment of the present invention;

[0062] FIG14 is a schematic diagram of the principle of straightening a composite plate according to an embodiment of the present invention. Reference numerals: 1, unwinding device; 2, camera; 3, texturing friction roller; 4, dust removal roller; 5, first plate; 6, chamber; 7, partition; 8, control terminal; 9, controller; 10, lifting assembly; 11, support roller; 12, vacuum cleaner; 13, air jet; 14, stripes; 15, tension control device; 16, second plate; 17, first speed sensor; 18, second speed sensor; 19, third speed sensor; 20, first straightening device; 21, second straightening device; 22, first bending portion; 23, second bending portion; 24, bending machine; 25, composite plate; 26, mobile phone frame. DETAILED DESCRIPTION

[0063] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0064] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as limiting the embodiments of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance.

[0065] In the description of the embodiments of the present invention, it should be noted that, unless otherwise specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; and direct connections or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the embodiments of the present invention based on the specific circumstances.

[0066] In the embodiments of the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, a first feature being "above," "above," or "above" a second feature may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. A first feature being "below," "below," or "below" a second feature may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0067] In the description of this specification, the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiment of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0068] The following describes the composite plate, composite plate texturing equipment and manufacturing method according to the embodiment of the present invention with reference to FIG1 to FIG14.

[0069] As shown in Figures 1 to 5, the mobile phone frame 26 includes a composite panel 25, which encloses a space for accommodating the mobile phone. The shape of the space is adapted to the shape of the mobile phone, and the width of the composite panel 25 is adapted to the thickness of the mobile phone. The composite panel 25 includes a first plate 5 and a second plate 16. Stripes 14 are formed on the first side surface of at least one of the first plate 5 and the second plate 16. The first side surface of the second plate 16 is rolled and connected to the first side surface of the first plate 5. The stripes 14 with a distance between adjacent stripes 14 of 0.005-0.03 mm account for more than 90% of the total number of stripes. Testing shows that when the stripes 14 with a distance between adjacent stripes 14 of 0.005-0.03 mm account for more than 90% of the total number of stripes, the shear strength of the composite panel is between 210 MPa and 245 MPa.

[0070] It should be noted that the number of composite panels 25 can be one, in which case the composite panels 25 are connected end to end to form a closed frame. Of course, the number of composite panels 25 can also be two, three or more, in which case the composite panels 25 are connected in sequence to form a closed frame.

[0071] The composite plate 25 provided in an embodiment of the present invention forms stripes 14 on the first side of the first plate body 5 by roughening the first side of the first plate body 5, thereby increasing the area when the first plate body 5 and the second plate body 16 are rolled, so that the composite plate 25 formed after the first plate body 5 and the second plate body 16 are compounded has higher bonding strength, thereby ensuring that the mobile phone frame 26 is more firmly bonded.

[0072] According to an embodiment of the present invention, a groove is provided on the side of the composite plate 25 facing the receiving space. The groove extends along the length of the composite plate 25. When a mobile phone is placed in the receiving space, the edge of the phone snaps into the groove, thereby firmly securing the phone frame 26 to the periphery of the phone. The cross-section of the groove is C-shaped or U-shaped, depending on the shape of the phone's edge.

[0073] According to an embodiment of the present invention, the stripes 14 with a distance between adjacent stripes 14 of 0.01mm-0.02mm account for greater than 90% of the total number of stripes. The more uniform the stripes 14 and the smaller the distance between adjacent stripes 14, the greater the number of stripes per unit area. This increases the area of ​​the first plate 5 and the second plate 16 during rolling, resulting in a higher bonding strength of the composite plate after the first and second plates 5 and 16 are joined. Testing has shown that when the stripes 14 with a distance between adjacent stripes 14 of 0.01mm-0.02mm account for greater than 90% of the total number of stripes, the shear strength of the composite plate is between 200 MPa and 230 MPa.

[0074] According to an embodiment of the present invention, the distance between two adjacent stripes 14 of 0.01 mm to 0.02 mm accounts for greater than 80% of the total number of stripes. Testing has shown that when the distance between two adjacent stripes 14 of 0.01 mm to 0.02 mm accounts for greater than 80% of the total number of stripes, the shear strength of the composite panel is between 190 MPa and 225 MPa.

[0075] According to an embodiment of the present invention, the distance between two adjacent stripes 14 of 0.01 mm to 0.02 mm accounts for greater than 70% of the total number of stripes. Testing has shown that when the distance between two adjacent stripes 14 of 0.01 mm to 0.02 mm accounts for greater than 70% of the total number of stripes, the shear strength of the composite panel is between 185 MPa and 220 MPa.

[0076] According to an embodiment of the present invention, the distance between two adjacent stripes 14 of 0.01 mm to 0.02 mm accounts for greater than 50% of the total number of stripes. Testing has shown that when the distance between two adjacent stripes 14 of 0.01 mm to 0.02 mm accounts for greater than 50% of the total number of stripes, the shear strength of the composite panel is between 170 MPa and 210 MPa.

[0077] According to an embodiment of the present invention, as shown in FIG5 , a mobile phone frame 26 includes two composite panels 25 . A first bend 22 is formed at a first end of the composite panel 25 and is bent toward one side of the receiving space. A second bend 23 is formed at a second end of the composite panel 25 and is bent toward one side of the receiving space. There are two ways to connect the two composite panels 25 . For ease of description, the two composite panels 25 are referred to as the first composite panel and the second composite panel, respectively. The following describes the two ways to connect the two composite panels 25 :

[0078] Method 1:

[0079] The first bending portion 22 of the first composite plate is connected to the first bending portion 22 of the second composite plate by welding, and the second bending portion 23 of the first composite plate is connected to the second bending portion 23 of the second composite plate by welding.

[0080] It should be noted that the length of the first bent portion 22 of the first composite plate may be equal to or different from the length of the first bent portion 22 of the second composite plate. The length of the second bent portion 23 of the first composite plate may be equal to or different from the length of the second bent portion 23 of the second composite plate. However, the total length of the first bent portion 22 of the first composite plate and the first bent portion 22 of the second composite plate is equal to the total length of the second bent portion 23 of the first composite plate and the second bent portion 23 of the second composite plate.

[0081] Method 1:

[0082] The first bending portion 22 of the first composite plate is connected to the second bending portion 23 of the second composite plate by welding, and the second bending portion 23 of the first composite plate is connected to the first bending portion 22 of the second composite plate by welding.

[0083] It should be noted that the length of the first bent portion 22 of the first composite plate may be equal to or different from the length of the second bent portion 23 of the second composite plate. The length of the second bent portion 23 of the first composite plate may be equal to or different from the length of the first bent portion 22 of the second composite plate. However, the total length of the first bent portion 22 of the first composite plate and the second bent portion 23 of the second composite plate is equal to the total length of the second bent portion 23 of the first composite plate and the first bent portion 22 of the second composite plate.

[0084] According to an embodiment of the present invention, the stripes 14 are straight stripes, and the straight stripes are arranged at intervals. The distance between two adjacent stripes 14 can be equal or unequal.

[0085] It should be noted that the stripes 14 in the embodiment of the present invention refer to grooves formed on the first side surface of the first plate 5 and / or the first side surface of the second plate 16 , and the depth of the grooves is determined by the pressure exerted on the texturing friction roller 3 during operation.

[0086] According to an embodiment of the present invention, the stripes 14 with a distance between two adjacent stripes 14 of 0.005-0.03 mm account for more than 90% of the total number of stripes. The more uniform the stripes 14 and the smaller the distance between two adjacent stripes 14, the more stripes there are per unit area, and the larger the area when the first plate body 5 and the second plate body 16 are rolled, so that the bonding strength of the composite plate 25 after the first plate body 5 and the second plate body 16 are composited is higher.

[0087] According to an embodiment of the present invention, the first plate 5 is elongated, and the length direction of the stripes 14 forms a predetermined angle with the width direction of the first plate 5. In this embodiment, the predetermined angle can be, but is not limited to, 70° to 82°. The stripes 14 of the first plate 5 are used to increase the contact area between the first plate 5 and the second plate 16 during rolling.

[0088] According to an embodiment of the present invention, the hardness of the first plate body 5 is greater than the hardness of the second plate body 16. Since the hardness of the second plate body 16 is smaller, the second plate body 16 will be deformed during the rolling process, and the second plate body 16 will enter the grooves of the stripes 14 of the first plate body 5. After the first plate body 5 cools down, the distance between the stripes 14 is reduced, and the second plate body 16 is tightly fitted with the first plate body 5 in the grooves of the stripes 14, forming an interference fit, thereby tightly combining the first plate body 5 and the second plate body 16 together.

[0089] The hardness HV in the embodiments of the present invention is the Vickers hardness, measured in kg / mm². Vickers hardness is defined as the ratio of the applied load to the area of ​​the indentation formed on the sample surface after a regular square pyramid diamond indenter is pressed into the sample surface with a certain load and held for a certain period of time before the test force is removed.

[0090] According to an embodiment of the present invention, the first plate 5 is a stainless steel plate, and the second plate 16 is an aluminum alloy plate. The materials of the first and second plates 5 and 16 are not limited thereto and may be determined based on actual needs. The stainless steel plate includes stainless steel plates containing various alloy components, stainless steel plates containing various non-metallic elements, or stainless steel plates with various metallographic structures. The first plate 5 may also be a steel plate with a coating on its surface. The aluminum alloy plate includes aluminum alloy plates containing various alloys and various component ratios.

[0091] According to an embodiment of the present invention, the hardness of the first plate 5 is HV270-330, the hardness of the second plate 16 is HV50-70, the roughness of the first side of the first plate 5 is 0.8~4.0Ra, and the roughness of the first side of the second plate 16 is 4-10Ra, where Ra is the arithmetic mean roughness.

[0092] According to an embodiment of the present invention, the shear strength of the composite plate 25 is τ=a*b*K1*K2*σ 软 , a is the length of the first plate 5, b is the width of the first plate 5, K1 is the roughening area ratio of the first plate 5, and the value range of K1 is 1.5-3; K2 is the bonding ratio of the first plate 5 and the second plate 16, and the value range of K2 is 0.15-0.3. When K1*K2>1, the product of K1 and K2 is 1; σ 软 is the yield strength of the second plate 16, σ 软 The value range is 350-412Mpa. Mpa is the unit of pressure, m stands for mega and pa stands for Pascal.

[0093] The following describes a specific embodiment of the present invention with reference to Figures 1, 2, and 3. In Figures 1 and 2, a composite plate 25 includes a first plate 5 and a second plate 16. The first plate 5 is a stainless steel plate, and the second plate 16 is an aluminum alloy plate. Stripes 14 are formed on the first side of the stainless steel plate. The stripes 14 are linear stripes, and the linear stripes 14 are spaced apart. Stripes 14 with a distance of 0.02 mm between adjacent stripes 14 account for more than 90% of the total number of stripes. The stainless steel plate is elongated, with the length of the stripes 14 forming a 78° angle with the width of the stainless steel plate. The hardness of the stainless steel plate is HV300, and the roughness of the first side of the stainless steel plate is 2Ra.

[0094] The thickness ratio of the stainless steel plate to the aluminum alloy plate is 1.5:1.0, and the roughness of the first side of the aluminum alloy plate is 3Ra. The first side of the aluminum alloy plate and the first side of the stainless steel plate are rolled together to form a composite plate 25. The shear strength of the composite plate 25 is τ = a*b*K1*K2*σ 软 , a is the length of the stainless steel plate, b is the width of the stainless steel plate, K1 is the roughening area ratio of the stainless steel plate, and the value range of K1 is 2; K2 is the bonding ratio of the stainless steel plate and the aluminum alloy plate, and the value range of K2 is 0.2. When K1*K2>1, the product of K1 and K2 is 1; σ 软 is the yield strength of the aluminum alloy plate, σ 软 The value range is 380Mpa.

[0095] The composite plate 25 provided in the embodiment of the present invention forms stripes 14 on the first side of the first plate body 5 by roughening the first side of the first plate body 5, thereby increasing the area of ​​the first plate body 5 and the second plate body 16 during rolling, so that the composite plate 25 after the first plate body 5 and the second plate body 16 are composited has higher bonding strength and is more firmly bonded. The shear force of the composite plate 25 rolled in the embodiment of the present invention is very large, and the bonding of the composite plate 25 is tight, meeting the design requirements. The processed composite plate 25 has a firm bond and is convenient for processing as a frame. When used in the production of mobile phone covers, it meets many requirements such as low mobile phone signal shielding and low strength-to-weight ratio.

[0096] The present invention also provides a composite panel texturing apparatus, as shown in Figures 6 and 7 . The composite panel texturing apparatus is used for the composite panel described in any of the above embodiments. The composite panel texturing apparatus includes a texturing device, which includes a body, a first drive mechanism, and at least one texturing friction roller 3. The texturing friction roller 3 is rotatably mounted on the body and is configured to rub the first side surface of the first plate 5 or the first side surface of the second plate 16. The axis of the texturing friction roller 3 forms a predetermined angle with the first direction. In this embodiment, the predetermined angle is 70° to 82°. The first drive mechanism is configured to drive the texturing friction roller 3 in axial rotation. The first drive mechanism includes a first motor and a first transmission mechanism. The rotating shaft of the first motor is connected to the texturing friction roller 3 via the first transmission mechanism. The first transmission mechanism may be a combination of a belt and pulley, a combination of a gear and chain, or a combination of multiple gears. The specific structure of the first transmission mechanism is not limited to the examples given here, as long as it can drive the texturing friction roller 3 in rotation.

[0097] It should be noted that, as shown in FIG6 , the second direction is the left-right direction in FIG6 , and the first direction is the front-back direction in FIG6 . When the texturing device is in operation, the first plate 5 or the second plate 16 moves in the second direction and contacts the texturing friction roller 3 . The rotating texturing friction roller 3 rubs the first side surface of the first plate 5 or the first side surface of the second plate 16 , forming stripes 14 on the first side surface of the first plate 5 or the first side surface of the second plate 16 .

[0098] According to an embodiment of the present invention, the texturized friction roller 3 includes a wire brush roller, which includes a cylindrical roller body and a plurality of wire brushes wrapped around the outer circumference of the cylindrical roller body, each wire brush consisting of multiple filaments. The hardness of the wire brush roller's filaments is HRC55-60, the pressure applied to the wire brush roller during operation is 1-1.5 MPa, the diameter of the wire brush roller is 250-400 mm, the speed of the wire brush roller is 400-600 rpm, the length of the brush filaments is 10-40 mm, the brush filament density is greater than 60%, and the diameter of the brush filaments is 0.3-0.5 mm. The pressure applied to the wire brush roller during operation determines the depth and number of the stripes 14, while the diameter of the brush filaments determines the width of the stripes 14. The pressure applied to the wire brush roller during operation and the diameter of the brush filaments are determined according to actual needs.

[0099] The hardness HRC in the embodiment of the present invention is Rockwell hardness, which was proposed by S.P. Rockwell in 1921. The hardness value of the metal material measured by the Rockwell hardness tester has no unit and is only represented by the code "HR". HRC is the hardness obtained by using a 150Kg load and a diamond cone indenter, and is used for materials with very high hardness. For example: hardened steel, etc. The measurement method is to press a steel ball or a diamond indenter vertically into the surface of the test material under a specified external load to produce a dent. According to the depth of the dent after the load is released, the Rockwell hardness calculation formula HR = (KH) / C can be used to calculate the Rockwell hardness. The Rockwell hardness value is displayed on the dial of the hardness tester and can be read directly.

[0100] According to an embodiment of the present invention, the texturing friction roller 3 includes a grinding wheel having a grit size of 40-120, a pressure of 0.1-0.5 MPa during operation, and a diameter of 200-400 mm. The pressure applied to the grinding wheel during operation determines the depth and number of the stripes 14, while the grit size of the grinding wheel determines the width of the stripes 14.

[0101] According to an embodiment of the present invention, the texturing device further includes a dust removal assembly, comprising a dust removal roller 4 and a second drive mechanism. The dust removal roller 4 is rotatably mounted on the body, with the axis of the dust removal roller 4 extending along a first direction. The texturing friction roller 3 and the dust removal roller 4 are sequentially spaced apart along a second direction. Two support rollers 11 are positioned above each texturing friction roller 3 and dust removal roller 4, each rotatably connected to the body. The two support rollers 11 are spaced apart. The support rollers 11 cooperate with the texturing friction roller 3 and the dust removal roller 4 to limit the first plate 5 or the second plate 16 undergoing texturing, ensuring good contact between the texturing friction roller 3 and the dust removal roller 4. The second drive mechanism is configured to drive the dust removal roller 4 in axial rotation. The second drive mechanism comprises a second motor and a second transmission mechanism, the rotating shaft of the second motor being connected to the dust removal roller 4 via the second transmission mechanism. The second transmission mechanism can be a combination of a belt and pulley, a combination of a gear and a chain, or a combination of multiple gears. The dust removal roller 4 is a brush roller, and the dust removal roller 4 can remove debris on the surface of the first plate 5 or the second plate 16 by contacting the first side surface of the first plate 5 or the first side surface of the second plate 16 .

[0102] During the operation of the texturing device, the first side surface of the first plate body 5 or the first side surface of the second plate body 16 is first texturized by the texturing friction roller 3, and then the dust removal roller 4 is used to remove debris on the surface of the first plate body 5 or the second plate body 16 to ensure that the surface of the first plate body 5 or the second plate body 16 is clean after texturizing, and then subsequent rolling and other work are carried out.

[0103] It should be noted that, in this embodiment, only one dust removal roller 4 is provided, and of course, two or more dust removal rollers 4 may be provided according to actual needs. The debris includes but is not limited to metal debris and dust, and may also be other substances.

[0104] According to an embodiment of the present invention, the dust removal assembly further includes a dust collector 12 and an air jet 13. The dust collector 12 is arranged on the periphery of at least one of the texturing friction roller 3 and the dust removal roller 4. The dust collector 12 is connected to the negative pressure device through a pipeline. The dust collector 12 can suck away the dust near the texturing friction roller 3 and the dust removal roller 4 to prevent air pollution. The air jet 13 is arranged on the machine body and is located on the side of the dust removal roller 4 away from the texturing friction roller 3. The air jet 13 is connected to the air supply device through a pipeline, and the air supply device provides a high-speed airflow to the air jet 13. In this embodiment, the air jets 13 are arranged in two rows, one above the other, and the two rows of air jets 13 are separated by a certain distance to facilitate the passage of the first plate body 5 or the second plate body 16. When the first plate 5 or the second plate 16 passes between the upper and lower rows of air jets 13, the air jets 13 spray high-speed airflow toward the first plate 5 or the second plate 16 to remove debris on the surface of the first plate 5 or the second plate 16, ensuring that the surface of the first plate 5 or the second plate 16 is clean, so that the camera 2 can obtain clear image information, which is convenient for subsequent rolling and other processes.

[0105] According to an embodiment of the present invention, the texturing device further comprises a housing, the housing being disposed within the housing. Partitions 7 are interspersed within the housing to divide the interior of the housing into a plurality of chambers 6. The texturing friction roller 3 and the dust removal roller 4 are located within corresponding chambers 6. A through-hole (not shown) is provided in the partition 7 between two adjacent chambers 6 to facilitate the passage of the first plate 5 or the second plate 16. The partitions 7 provided within the housing divide the interior of the housing into a plurality of smaller chambers 6, thereby enhancing the dust removal efficiency of the vacuum cleaner 12.

[0106] According to an embodiment of the present invention, the texturing device further includes a lifting assembly 10 connected to the texturing friction roller 3. The lifting assembly 10 is used to adjust the height of the texturing friction roller 3. After the texturing friction roller 3 rubs against the first plate 5 or the second plate 16 for a period of time, the outer diameter of the texturing friction roller 3 decreases, resulting in the number of stripes 14 formed during the texturing process failing to meet the design requirements. Therefore, the lifting assembly 10 is required to increase the height of the texturing friction roller 3 so that the texturing friction roller 3 is in full contact with the first side surface of the first plate 5 or the first side surface of the second plate 16. In this embodiment, the lifting assembly 10 is a screw assembly consisting of a servo motor and a lead screw. The slider of the lead screw assembly is connected to the texturing friction roller 3. The servo motor drives the lead screw to rotate, thereby pushing the texturing friction roller 3 up and down, thereby adjusting the height of the texturing friction roller 3. Of course, the type of lifting assembly 10 is not limited to this, as long as it can drive the texturing friction roller 3.

[0107] According to an embodiment of the present invention, the composite plate texturing apparatus further includes a detection device comprising a control terminal 8, a controller 9, and a camera 2. The camera 2 is located below the first plate 5 or the second plate 16, and faces the first side surface of the first plate 5 or the second plate 16, i.e., the camera 2 is positioned upward. The camera 2 is configured to capture image information of the first side surface of the first plate 5 or the second plate 16. The controller 9 is electrically connected to the lifting assembly 10 and is configured to control the operation and stopping of the lifting assembly 10. The control terminal 8 is electrically connected to the controller 9 and the camera 2, respectively, and is configured to determine whether the number of fringes per unit area on the first side surface of the first plate 5 or the second plate 16 is greater than a corresponding preset value, and further to determine whether the number of fringes per unit area on the first side surface of the first plate 5 or the second plate 16 is less than a corresponding preset value, and to control the lifting assembly 10 to increase the height of the texturing friction roller 3.

[0108] According to an embodiment of the present invention, the composite board texturing equipment further includes an unwinding device 1 and a tension control device 15. The unwinding device 1 is disposed on the side of the texturing friction roller 3 facing away from the dust removal roller 4. The unwinding device 1 is configured to wind the first plate 5 or the second plate 16 and release the first plate 5 or the second plate 16 under the traction of a drive assembly. The tension control device 15 is disposed on the side of the dust removal roller 4 facing away from the texturing friction roller 3. The tension control device 15 is configured to drive the first plate 5 or the second plate 16 in a second direction while applying a certain tension. The tension control device 15 comprises a plurality of cylindrical rollers and a drive motor. The drive motor is connected to the cylindrical rollers. The first plate 5 or the second plate 16 is clamped between the cylindrical rollers. By driving the cylindrical rollers to rotate, the first plate 5 or the second plate 16 is driven to move in the second direction. Driven by the tension control device 15, the first plate 5 or the second plate 16 is released from the unwinding device 1 with a predetermined tension and passes through the texturing friction roller 3 and the dust removal roller 4 in sequence.

[0109] A specific embodiment of the present invention is described below with reference to Figures 6 and 7: In Figures 6 and 7, the composite plate texturing equipment includes a texturing device, a detection device, an unwinding device 1 and a tension control device 15, wherein the unwinding device 1, the texturing device and the tension control device 15 are arranged in sequence along the second direction, that is, the unwinding device 1 is located on the left side of the texturing device, and the tension control device 15 is located on the right side of the texturing device.

[0110] The texturing device includes a machine body, a first drive mechanism, two texturing friction rollers 3, a dust removal assembly, a housing, and a lifting assembly 10. The machine body is disposed within the housing, and the two texturing friction rollers 3 are rotatably disposed within the machine body. The texturing friction rollers 3 are used to rub the first side surface of the first plate 5 or the first side surface of the second plate 16. The axes of the texturing friction rollers 3 form a preset angle with the first direction, which in this embodiment is 80°. The first drive mechanism includes a first motor and a first transmission mechanism. The rotating shaft of the first motor is connected to the texturing friction rollers 3 through the first transmission mechanism. The first transmission mechanism can be a combination of a belt and a pulley, a combination of a gear and a chain, or a combination of multiple gears.

[0111] The texturing friction roller 3 comprises a wire brush roller, which comprises a cylindrical roller body and a plurality of wire brushes wrapped around the outer circumference of the cylindrical roller body. Each wire brush consists of multiple filaments. The filament hardness of the wire brush roller is HRC55, the pressure applied to the wire brush roller during operation is 1.5 MPa, the diameter of the wire brush roller is 300 mm, the speed of the wire brush roller is 500 rpm, the length of the brush filament is 30 mm, the brush filament density is greater than 60%, and the diameter of the brush filament is 0.35 mm.

[0112] The dust removal assembly includes a dust removal roller 4, a second drive mechanism, a dust collector 12, and an air jet 13. The dust removal roller 4 is rotatably mounted on the machine body, with its axis extending in a first direction. The texturized friction roller 3 and the dust removal roller 4 are spaced apart in sequence along a second direction, with the dust removal roller 4 located to the right of the two texturized friction rollers 3. Two support rollers 11 are positioned above each of the texturized friction rollers 3 and 4, rotatably connected to the machine body. The two support rollers 11 are spaced apart. The support rollers 11 cooperate with the texturized friction roller 3 and the dust removal roller 4, acting as position limiters for the first plate 5 or the second plate 16, respectively, ensuring good contact between the texturized friction roller 3 and the dust removal roller 4. The second drive mechanism is used to drive the dust removal roller 4 in axial rotation. The second drive mechanism includes a second motor and a second transmission mechanism. The second motor's shaft is connected to the dust removal roller 4 via the second transmission mechanism. The second transmission mechanism can be a combination of a belt and pulley, a gear and chain, or multiple gears. The dust removal roller 4 is a brush roller, which removes debris on the surface of the first plate 5 and / or the second plate 16 by contacting the first side surface of the first plate 5 or the first side surface of the second plate 16 .

[0113] During the operation of the texturing device, the first side surface of the first plate body 5 or the first side surface of the second plate body 16 is first texturized by the texturing friction roller 3, and then the dust removal roller 4 is used to remove debris on the surface of the first plate body 5 or the second plate body 16 to ensure that the surface of the first plate body 5 or the second plate body 16 is clean after texturizing, and then subsequent rolling and other work are carried out.

[0114] There are three vacuum cleaners 12, two of which are arranged on the periphery of the texturing friction roller 3, and the other vacuum cleaner 12 is arranged on the periphery of the dust removal roller 4. The vacuum cleaner 12 is connected to the negative pressure equipment through a pipeline. The vacuum cleaner 12 can suck away the dust near the texturing friction roller 3 and the dust removal roller 4 to prevent air pollution.

[0115] There are multiple air jets 13, which are arranged on the machine body and are located on the side of the dust removal roller 4 away from the texturizing friction roller 3, that is, the air jet 13 is located on the right side of the dust removal roller 4. The air jet 13 is connected to the air supply device through a pipeline, and the air supply device provides a high-speed airflow to the air jet 13. In this embodiment, the air jets 13 are arranged in two rows, one above the other, and the upper and lower rows of air jets 13 are spaced a certain distance apart to facilitate the passage of the first plate 5 or the second plate 16. When the first plate 5 or the second plate 16 passes between the upper and lower rows of air jets 13, the air jet 13 sprays a high-speed airflow toward the first plate 5 or the second plate 16 to further remove debris on the surface of the first plate 5 or the second plate 16, ensuring that the surface of the first plate 5 or the second plate 16 is clean, ensuring that the camera 2 can obtain clear image information, and avoiding affecting the rolling of the first plate 5 and the second plate 16.

[0116] Two partitions 7 are provided within the housing, dividing the interior of the housing into three chambers 6. The two texturized friction rollers 3 are positioned in two corresponding chambers 6, and the dust removal roller 4 is positioned in the remaining chamber 6. Through holes are provided in the partitions 7 between adjacent chambers 6 to facilitate the passage of the first plate 5 and the second plate 16. The partitions 7 divide the interior of the housing into multiple smaller chambers 6, enhancing the dust removal efficiency of the vacuum cleaner 12.

[0117] The lifting assembly 10 is connected to the texturing friction roller 3 and is used to change the height of the texturing friction roller 3. After the texturing friction roller 3 texturizes the first side surface of the first plate 5 or the first side surface of the second plate 16 for a period of time, the brush filaments will wear out and the outer diameter of the texturing friction roller 3 will decrease, resulting in the number of stripes 14 produced by the texturing treatment failing to meet the design requirements. Therefore, it is necessary to increase the height of the texturing friction roller 3 by using the lifting assembly 10 so that the texturing friction roller 3 is in full contact with the first side surface of the first plate 5 or the first side surface of the second plate 16. In this embodiment, the lifting assembly 10 is a screw assembly consisting of a servo motor and a screw. The slider of the screw assembly is connected to the texturing friction roller 3. The servo motor drives the screw to rotate, thereby pushing the texturing friction roller 3 to slide up and down, thereby changing the height of the texturing friction roller 3. Of course, the type of lifting assembly 10 is not limited to this, and the lifting assembly 10 can also be other types of lifting mechanisms.

[0118] The detection device includes a control terminal 8, a controller 9, and a camera 2. The camera 2 is located below the first plate 5 or the second plate 16 and faces the first side surface of the first plate 5 or the second plate 16. The camera 2 is used to capture image information of the first side surface of the first plate 5 or the second plate 16. The controller 9 is electrically connected to the lifting assembly 10 and is used to control the operation and stopping of the lifting assembly 10. The control terminal 8 is electrically connected to the controller 9 and the camera 2, respectively. The control terminal 8 is used to determine whether the number of stripes per unit area on the first side surface of the first plate 5 or the second plate 16 is greater than a corresponding preset value, and is also used to determine whether the number of stripes per unit area on the first side surface of the first plate 5 or the second plate 16 is less than a corresponding preset value, and to control the lifting assembly 10 to increase the height of the texturing friction roller 3.

[0119] The unwinding device 1 is arranged on the side of the texturing friction roller 3 away from the dust removal roller 4. The unwinding device 1 is used to wind the first plate 5 or the second plate 16 and release the first plate 5 or the second plate 16 under the traction of the tension control device 15.

[0120] The tension control device 15 is disposed on the side of the dust removal roller 4 facing away from the texturing friction roller 3, and is located to the right of the dust removal roller 4. The tension control device 15 is used to drive the first plate 5 or the second plate 16 to move in the second direction. The tension control device 15 comprises a plurality of cylindrical rollers and a drive motor. The drive motor is connected to the cylindrical rollers, and the first plate 5 or the second plate 16 is clamped between the cylindrical rollers. By driving the cylindrical rollers to rotate, the first plate 5 or the second plate 16 is driven to move in the second direction. Driven by the tension control device 15, the first plate 5 or the second plate 16 is released from the unwinding device 1 with a predetermined tension. By applying tension to the first plate 5 or the second plate 16, the texturing friction roller 3 can be effectively contacted with it.

[0121] The composite plate texturing equipment provided in an embodiment of the present invention texturizes the first side surface of the first plate body 5 to form stripes 14 on the first side surface of the first plate body 5, thereby increasing the area of ​​the first plate body 5 and the second plate body 16 during rolling. This increases the bonding strength and firmness of the composite plate after the first plate body 5 and the second plate body 16 are combined. The composite plates produced using the composite plate texturing equipment of the present invention have a large shear force, and the bonding of the composite plates is tight, meeting the design requirements. The processed composite plates have a firm bonding, are convenient for processing as frames, and meet multiple requirements such as low mobile phone signal shielding and a low strength-to-weight ratio.

[0122] The present invention also provides a method for manufacturing a mobile phone frame 26 of the composite board as described in any of the above embodiments. As shown in FIG8 , the method for manufacturing the mobile phone frame includes the following steps:

[0123] Step 100 , rubbing the first side surface of at least one of the first plate 5 and the second plate 16 with a texturing friction roller 3 to form stripes 14 ;

[0124] The texturing process is to form groove-shaped straight lines on the first side surface of the first plate body 5 or the first side surface of the second plate body 16 .

[0125] During contact between the texturing friction roller 3 and the first side surface of the first plate 5 or the first side surface of the second plate 16, friction forms striations 14. Because the texturing friction roller 3 rotates at a constant speed, and the first and second plates 5, 16 move at a constant speed along the second direction, the striations 14 formed on the first and second sides of the first and second plates 5, 16 are linear, spaced apart, and form a predetermined angle with the width of the first and second plates 5, 16. Streaks 14 with a distance between adjacent striations of 0.005-0.03 mm account for greater than 90% of the total number of striations. The texturing process can be performed once, twice, or more times.

[0126] Step 200 , asynchronously rolling the first plate 5 and the second plate 16 to obtain a composite plate 25 ;

[0127] Step 300, bending the composite plate 25;

[0128] As shown in Figures 9 to 13, the bending process mainly includes the following steps: first, the first end of the composite plate 25 is bent by a bending machine 24, so that the first end of the composite plate 25 forms a first bent portion 22 that is bent toward one side of the accommodation space; then, the second end of the composite plate 25 is bent by the bending machine 24, so that the second end of the composite plate 25 forms a second bent portion 23 that is bent toward one side of the accommodation space. Finally, the composite plate 25 is sheared, and the bent composite plate 25 is now U-shaped.

[0129] Of course, the bending machine 24 can also be used to bend only the first end of the composite plate 25, and then the composite plate 25 can be sheared. At this time, the composite plate 25 is L-shaped, and four L-shaped composite plates 25 are connected end to end in sequence to form a rectangular mobile phone frame 26.

[0130] Step 400 , welding the bent composite plate 25 to obtain a mobile phone frame 26 .

[0131] In this embodiment, both the first side surface of the first plate body 5 and the first side surface of the second plate body 16 are roughened. Of course, only the first side surface of the first plate body 5 may be roughened.

[0132] According to an embodiment of the present invention, the texturing friction roller includes a wire brush roller, the brush filament hardness of the wire brush roller is HRC55-60, the pressure applied to the wire brush roller during operation is 1-1.5 MPa, the diameter of the wire brush roller is 250-400 mm, the rotation speed of the wire brush roller is 400-600 r / min, the length of the brush filament is 10-40 mm, and the diameter of the brush filament is 0.3-0.5 mm;

[0133] Alternatively, the texturing friction roller comprises a grinding wheel, the grit number of the grinding wheel is 40-120, the pressure applied to the grinding wheel during operation is 0.1-0.5 MPa, and the diameter of the grinding wheel is 200-400 mm.

[0134] According to an embodiment of the present invention, the stripes with a distance between two adjacent stripes of 0.005-0.03 mm account for more than 90% of the total number of stripes.

[0135] According to an embodiment of the present invention, before performing the step of asynchronously rolling the first plate body 5 and the second plate body 16, the following steps are further performed:

[0136] Step 110 : removing debris from the surface of the first plate 5 and / or the second plate 16 .

[0137] During the rotation of the dust removal roller 4, debris on the surface of the first plate 5 or the second plate 16 can be removed. When the first plate 5 or the second plate 16 moves between the upper and lower rows of air jets 13, the air jets 13 spray high-speed airflow toward the first plate 5 or the second plate 16 to further remove the debris on the surface of the first plate 5 or the second plate 16, so that the surface of the first plate 5 or the second plate 16 is clean, ensuring that the camera 2 can obtain clear image information and avoiding affecting the composite of the first plate 5 and the second plate 16.

[0138] According to an embodiment of the present invention, after performing the step of removing debris from the surface of the first plate 5 and / or the second plate 16, the following steps are further performed:

[0139] Step 120 , obtaining the number of fringes per unit area of ​​the first side surface of the first plate 5 or the first side surface of the second plate 16 ;

[0140] The camera 2 obtains image information of the first side surface of the first plate 5 or the first side surface of the second plate 16 , and sends the image information to the control terminal 8 .

[0141] Step 130 , determining whether the number of stripes per unit area on the first side surface of the first plate 5 or the first side surface of the second plate 16 is less than a corresponding preset value, and controlling the lifting assembly 10 to increase the height of the texturing friction roller 3 .

[0142] When the control terminal 8 determines that the number of stripes per unit area on the first side surface of the first plate body 5 or the first side surface of the second plate body 16 is less than the corresponding preset value, the control terminal 8 sends a control instruction to the controller 9. The controller 9 controls the lifting assembly 10 to rise according to the control instruction, thereby increasing the height of the texturing friction roller 3 so that the texturing friction roller 3 is in close contact with the first side surface of the first plate body 5 or the first side surface of the second plate body 16.

[0143] It is determined that the number of fringes per unit area on the first side surface of the first plate body 5 or the first side surface of the second plate body 16 is greater than a corresponding preset value. The control terminal 8 calculates the number of fringes per unit area based on the acquired image information. When it is determined that the number of fringes per unit area on the first side surface of the first plate body 5 or the first side surface of the second plate body 16 is greater than the corresponding preset value, it indicates that the texturing friction roller 3 is in good contact with the first side surface of the first plate body 5 or the first side surface of the second plate body 16, and there is no need to increase the height of the texturing friction roller 3.

[0144] According to an embodiment of the present invention, the step of asynchronously rolling the first plate body 5 and the second plate body 16 includes:

[0145] Step 210, heating the first plate 5 and the second plate 16;

[0146] During the heating process of the first plate 5 and the second plate 16, an online heating method is used, specifically eddy current heating. The heating temperature of the first plate 5 is 350°C. The online heating method can achieve rolling and cladding of the first side surface of the first plate 5 and the first side surface of the second plate 16 in a semi-molten state, further improving the bonding strength of the composite plate.

[0147] The asynchronous rolling in the embodiment of the present invention refers to the process of rolling the stainless steel plate and the aluminum alloy plate (i.e., the first plate body 5 and the second plate body 16) into a composite plate using upper and lower rollers, and the speed of the rollers rolling the stainless steel plate and the rollers rolling the aluminum plate are different.

[0148] In step 220 , the heated first plate 5 and the second plate 16 are asynchronously rolled to connect the first side surface of the second plate 16 to the first side surface of the first plate 5 by rolling to form a composite plate.

[0149] Asynchronous rolling is adopted in the rolling process of the first plate body 5 and the second plate body 16. The thickness ratio of the first plate body 5 and the second plate body 16 is 1.5:1.0, the speed ratio of the roller corresponding to the first plate body 5 and the roller corresponding to the second plate body 16 is 1:1.05, and the rolling reduction rate of the asynchronous rolling is 20%-40%.

[0150] In the embodiment of the present invention, an online heating method is used for the first plate 5, specifically, the stainless steel plate. The purpose of this method is to cause the stripes 14 on the surface of the stainless steel plate to expand due to heat, thereby widening and deepening the grooves of the stripes 14. The heated stainless steel plate is then pressed together with the less hard aluminum alloy plate by upper and lower rollers. Because the hardness of the stainless steel plate is much greater than that of the aluminum alloy plate, the first side surface of the aluminum alloy plate is pressed into the grooves on the stainless steel surface at the composite surface of the aluminum alloy plate and the stainless steel plate. Simultaneously, the stainless steel plate contracts due to cooling, while the aluminum alloy plate surface expands due to heating. This allows the stainless steel plate and the aluminum alloy plate to fit tightly together on both sides of the groove, forming an over-fitting fit, thereby forming a tight bond between the stainless steel plate and the aluminum alloy plate.

[0151] According to an embodiment of the present invention, after performing the step of asynchronously rolling the heated first plate 5 and the second plate 16, the following steps are further performed:

[0152] Step 230, performing a solution treatment on the composite plate;

[0153] Solution treatment involves heating and cooling. During the heating phase, the composite plate is placed in a solution furnace for solution treatment at a temperature of 480-540°C for 45-65 minutes. During the cooling phase, the composite plate is rapidly cooled to room temperature. This solution treatment further enhances the bond strength of the composite plate.

[0154] Step 240 , performing aging treatment on the composite plate after the solution treatment.

[0155] After solution treatment, the composite plate also requires aging treatment. This treatment is performed in an aging furnace at a temperature of 160-200°C for 5-7 hours. Aging treatment can further enhance the bond strength of the composite plate.

[0156] According to an embodiment of the present invention, before performing the step of bending the composite plate 25, the following steps are further performed:

[0157] Step 250 : performing straightening treatment on the composite plate 25 .

[0158] As shown in Figure 14, due to the composite rolling of two different types of metal plates, composite plate 25 may bend in one direction after rolling. Therefore, composite plate 25 needs to be straightened. During the straightening process, a tensile force is applied to composite plate 25 along a second direction to prevent bending or warping of composite plate 25 after rolling. Straightening is achieved using a bidirectional combined straightening machine. Since bidirectional combined straightening machines are common equipment in industrial production, they will not be described in detail here.

[0159] According to an embodiment of the present invention, the step of straightening the composite plate 25 includes:

[0160] Step 251, performing thickness-direction straightening treatment on the composite plate 25;

[0161] As shown in Figure 14, the thickness direction of the composite plate 25 is referred to as the third direction, which is perpendicular to the first and second directions. During the thickness-direction straightening process, a tensile force needs to be applied to the composite plate 25 along the second direction to prevent bending of the composite plate 25. The transmission speed of the composite plate 25 after thickness-direction straightening is greater than the transmission speed of the composite plate 25 before thickness-direction straightening. Thickness-direction straightening is performed by the first straightening device 20 of the bidirectional combined straightening machine. A first speed sensor 17 and a second speed sensor 18 are respectively provided at the front and rear of the first straightening device 20. Width-direction straightening is performed by the second straightening device 21 of the bidirectional combined straightening machine. A third speed sensor 19 is provided behind the second straightening device 21. By providing multiple speed sensors to detect the speed of the composite plate 25 at different stages during the straightening process, the speed of the composite plate 25 during the straightening process is ensured to be stable, thereby preventing bending of the composite plate 25 after straightening.

[0162] Step 252 : performing width-direction straightening processing on the composite plate 25 .

[0163] As shown in Figure 14, the composite plate 25 undergoes width-direction straightening, i.e., straightening in a first direction. During this process, tension is also applied to the composite plate 25 in a second direction to prevent bending. During the straightening process, tension is applied to the composite plate 25 in the second direction by the tension control device of the bidirectional straightening machine. The transport speed of the composite plate 25 after width-direction straightening is greater than the transport speed before width-direction straightening. Assume that the transport speed of the composite plate 25 before thickness-direction straightening is a first speed V1, the transport speed of the composite plate 25 after thickness-direction straightening is a second speed V2, and the transport speed of the composite plate 25 after width-direction straightening is a third speed V3. The value of V2 / V1 is greater than 1 and less than or equal to 1.5, the value of V3 / V2 is greater than 1 and less than or equal to 1.5, and the value of V2 / V1 is greater than the value of V3 / V2. The composite plate 25 is a stainless steel aluminum alloy composite plate 25. The hardness of the stainless steel plate before composite is HV300 and the thickness is 3.5mm. The hardness of the aluminum alloy plate before composite is HV50 and the thickness is 8mm. The thickness of the stainless steel layer and the aluminum alloy layer in the rolled composite plate 25 are equal, both 3.2mm. The unit tension of the composite plate 25 during the width direction straightening and thickness direction straightening is 2.5N / mm 2 . The method for manufacturing a mobile phone frame provided by an embodiment of the present invention forms stripes 14 on the first side of the first plate body 5 by roughening the first side of the first plate body 5, thereby increasing the area of ​​the first plate body 5 and the second plate body 16 during rolling, so that the bonding strength of the composite plate 25 after the first plate body 5 and the second plate body 16 are composited is higher and the bonding is more firm. By having different front and rear speeds of the composite plate 25 during thickness straightening, and applying tension to the composite plate 25 along the second direction, bending or warping of the composite plate 25 after rolling can be avoided. Since the bending direction of the composite plate 25 after rolling is mainly deviated from the thickness direction, not too much tension is required when straightening in the width direction, but a larger tension needs to be applied to avoid bending of the composite plate 25 when straightening in the thickness direction.

[0164] Due to the composite rolling of two different types of metal plates, the composite plate 25 will bend in one direction after rolling. Therefore, the composite plate 25 needs to be straightened. During the straightening process, tension needs to be applied to the composite plate 25 along the second direction to avoid bending or warping of the composite plate 25 after rolling.

[0165] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A mobile phone frame, characterized in that: include: A composite plate (25) encloses a storage space for accommodating a mobile phone, the composite plate (25) comprising a first plate body (5) and a second plate body (16), stripes being formed on the first side of at least one of the first plate body (5) and the second plate body (16), the first side of the second plate body (16) being connected to the first side of the first plate body (5) by rolling, and the stripes (14) having a distance between two adjacent stripes (14) of 0.005-0.03 mm accounting for more than 90% of the total number of stripes.

2. The mobile phone frame according to claim 1, characterized in that: A groove is provided on one side of the composite plate (25) facing the accommodating space, and the groove extends along the length direction of the composite plate (25).

3. The mobile phone frame according to claim 1 or 2, characterized in that: The mobile phone frame comprises two composite plates (25), a first bending portion (22) bent toward one side of the accommodating space is formed at a first end of the composite plate (25), a second bending portion (23) bent toward one side of the accommodating space is formed at a second end of the composite plate (25), and the two composite plates (25) are connected via the first bending portion (22) and the second bending portion (23).

4. The mobile phone frame according to any one of claims 1 to 3, characterized in that: The stripes (14) with a distance between two adjacent stripes (14) of 0.01-0.02 mm account for more than 90% of the total number of stripes.

5. The mobile phone frame according to any one of claims 1 to 3, characterized in that: The stripes (14) with a distance between two adjacent stripes (14) of 0.01-0.02 mm account for more than 80% of the total number of stripes.

6. The mobile phone frame according to any one of claims 1 to 3, characterized in that: The stripes (14) with a distance between two adjacent stripes (14) of 0.01-0.02 mm account for more than 70% of the total number of stripes.

7. The mobile phone frame according to any one of claims 1 to 3, characterized in that: The stripes (14) with a distance between two adjacent stripes (14) of 0.01-0.02 mm account for more than 50% of the total number of stripes.

8. The mobile phone frame according to any one of claims 1 to 7, characterized in that: The roughness of the first side surface of the first plate body (5) is 0.8-4.0 Ra.

9. The mobile phone frame according to any one of claims 1 to 8, characterized in that: The roughness of the first side surface of the second plate (16) is 4-10 Ra.

10. The mobile phone frame according to any one of claims 1 to 9, characterized in that: The hardness of the first plate (5) is greater than the hardness of the second plate (16).

11. The mobile phone frame according to claim 10, characterized in that: The first plate body (5) is a stainless steel plate, and the second plate body (16) is an aluminum plate.

12. The mobile phone frame according to any one of claims 1 to 11, characterized in that: The shear strength of the composite plate τ=a*b*K1*K2*σ 软 , a is the length of the first plate (5), b is the width of the first plate (5), K1 is the roughening area ratio of the first plate (5), and the value range of K1 is 1.5-3; K2 is the bonding ratio of the first plate (5) and the second plate (16), and the value range of K2 is 0.15-0.

3. When K1*K2>1, the product of K1 and K2 is 1; the σ 软 is the yield strength of the second plate (16), σ 软 The value range is 350-412Mpa.

13. The mobile phone frame according to any one of claims 1 to 12, characterized in that: The first plate (5) is in the shape of an elongated strip, and a predetermined angle is formed between the length direction of the stripes (14) and the width direction of the first plate (5).

14. A method for manufacturing a mobile phone frame, characterized in that: The manufacturing method comprises the following steps: Performing a roughening treatment on the first side surface of the first plate body (5) and / or the first side surface of the second plate body (16); Asynchronously rolling the first plate (5) and the second plate (16) to obtain a composite plate (25); Bending the composite plate (25); The composite plate (25) after the bending process is welded to obtain a mobile phone frame.

15. The method for manufacturing a mobile phone frame according to claim 14, characterized in that: The step of roughening the first side surface of the first plate body (5) and / or the first side surface of the second plate body (16) comprises: The first side surface of the first plate body (5) and / or the first side surface of the second plate body (16) are rubbed by a texturing friction roller (3) to form stripes (14); Debris on the surface of the first plate (5) and / or the second plate (16) is removed.

16. The method for manufacturing a mobile phone frame according to claim 14 or 15, characterized in that: After performing the step of removing debris from the surface of the first plate (5) and / or the second plate (16), the following steps are further performed: Obtaining the number of fringes per unit area on the first side surface of the first plate (5) or the first side surface of the second plate (16); It is determined that the number of stripes per unit area on the first side of the first plate (5) or the first side of the second plate (16) is less than a corresponding preset value, and the lifting component (10) is controlled to increase the height of the texturing friction roller (3).

17. The method for manufacturing a mobile phone frame according to any one of claims 14 to 16, characterized in that: The step of asynchronously rolling the first plate (5) and the second plate (16) comprises: heating the first plate (5) and the second plate (16); The heated first plate (5) and the second plate (16) are asynchronously rolled so that the first side surface of the second plate (16) is connected to the first side surface of the first plate (5) by rolling to form the composite plate (25).

18. The method for manufacturing a mobile phone frame according to claim 17, wherein: After performing the step of asynchronously rolling the heated first plate (5) and the second plate (16), the following steps are further performed: performing a solution treatment on the composite plate (25); The composite plate (25) after the solution treatment is subjected to aging treatment.

19. The method for manufacturing a mobile phone frame according to claim 18, wherein: The solution temperature of the solution treatment is 480-540° C., and the solution time of the solution treatment is 45-65 min; the aging temperature of the aging treatment is 160-200° C., and the aging time of the aging treatment is 5-7 h.

20. The method for manufacturing a mobile phone frame according to any one of claims 14 to 19, characterized in that: The thickness ratio of the first plate (5) to the second plate (16) is 1.5:1.0, the speed ratio of the roller corresponding to the first plate body (5) and the roller corresponding to the second plate body (16) is 1: 1.05, the rolling reduction rate of the asynchronous rolling is 20%-40%.

21. The method for manufacturing a mobile phone frame according to any one of claims 14 to 19, characterized in that: Before performing the step of bending the composite plate (25), the following steps are also performed: The composite plate (25) is straightened.

22. The method for manufacturing a mobile phone frame according to claim 21, wherein: The step of straightening the composite plate (25) comprises: Performing thickness-direction straightening treatment on the composite plate (25); The composite plate (25) is subjected to a width-direction straightening treatment.

23. The method for manufacturing a mobile phone frame according to claim 21, wherein: Before performing the step of welding the composite plate (25) after the bending process, the following steps are also performed: The composite plate (25) after the bending process is sheared.

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