Workpiece preparation method, workpiece and electronic equipment

Abstract

The present application provides a workpiece preparation method, workpiece and electronic device, the method includes providing a base shell, placing the base shell in a heating device for heating, placing the heated base shell in a shaping device for pressing and shaping the area to be shaped, and using a cooling device to quickly cool and shape the base shell during the pressing and shaping process, and the reverse plastic deformation of the area to be shaped can achieve the repair of the original deformation, and obtain a workpiece with high flatness. The base shell is first heated to a preset temperature and then pressed and shaped by the hot base shell. Compared with pressing at room temperature or pressing with a hot mold, pressing the heated base shell can achieve greater plastic deformation, obtain greater deformation repair ability, and improve the shaping and repair effect. And during the pressing process, the base shell is quickly cooled and shaped, which can increase the degree and stability of plastic deformation and further improve the shaping and repair effect. The implementation action of heating first, pressing and shaping, and cooling can be deployed multiple times in the production process to gradually and steadily repair the flatness.

Description

Technical Field

[0001] The present application relates to the field of electronic equipment, and in particular to a workpiece preparation method, a workpiece and an electronic equipment. Background Art

[0002] With the continuous development of science and technology, electronic devices have also developed rapidly. Many electronic devices, such as laptops and smart phones, have become necessities in people's daily lives. In order to meet the needs of users, electronic devices are gradually developing in the direction of thinning, lightness, and large display screens.

[0003] The flatness of some workpieces of electronic devices such as mobile phones, such as the middle frame and back cover, plays an important role in the strength, stability, and aesthetics of the whole machine. However, in the process of workpiece processing, it is easy to cause the problem of uneven flatness of the workpiece. In order to optimize the flatness, the workpiece is usually repaired for flatness. A common repair scheme is reverse pressing at room temperature, such as placing the workpiece to be repaired in the lower mold of the pressing jig, and pressing the workpiece to be repaired through the upper mold of the pressing jig to make the uneven position produce reverse deformation, thereby achieving plastic repair of the uneven position. However, the degree of repairability of this plastic repair method is limited, and the repair effect is poor. Summary of the invention

[0004] The embodiments of the present application provide a workpiece preparation method, a workpiece and an electronic device. The preparation method has a greater deformation repair capability, improves the deformation repair effect on the workpiece, and the prepared workpiece has excellent flatness.

[0005] A first aspect of an embodiment of the present application provides a workpiece preparation method, comprising: providing a base shell having at least one area to be shaped.

[0006] The base shell is placed in a heating device for heating.

[0007] The heated base shell is placed in a shaping device to press and shape the area to be shaped, and a cooling device is used to cool the base shell during the pressing and shaping process.

[0008] Forming workpieces.

[0009] Through the above method, the base shell is heated to a preset temperature and then removed from the heating device and placed in a shaping device. The shaping device is used to press and shape the area to be shaped on the base shell. For example, pressure is applied to the area to be shaped so that it undergoes reverse elastic deformation and plastic deformation. In the process of pressing and shaping, a cooling device is used to quickly cool and shape the base shell. The reverse plastic deformation of the area to be shaped can achieve the purpose of shaping and repairing the original deformation of the area, thereby improving the flatness of the workpiece and obtaining a workpiece with higher flatness.

[0010] Moreover, the base shell is first heated to a preset temperature, and then the hot base shell is directly pressed. Compared with pressing at room temperature or pressing through a hot mold, pressing the heated base shell can achieve greater plastic deformation, greater deformation repair ability, and improve the plastic repair effect. In addition, the base shell is quickly cooled and shaped during the pressing process. Compared with cooling after pressing, the degree and stability of plastic deformation can be increased, which can further improve the plastic repair effect.

[0011] In a possible implementation manner, providing the base shell includes: providing a metal substrate.

[0012] The substrate is cut to form a base shell including a main frame and a side frame, and at least one of the main frame and the side frame has a first area to be shaped, and the deformation amount of the first area to be shaped is a first deformation amount, wherein the side frame is located on one side of the main frame, and the side frame protrudes outward from one side of the main frame.

[0013] The side frames and the main frame are formed by cutting the substrate, thereby enriching the structural design of the base shell (workpiece). Due to the difference in thickness and the offset of the stress center, at least one of the side frames and the main frame after cutting and forming has a first area to be reshaped. The method provided in the embodiment of the present application can achieve an excellent reshaping and repair effect, and can be applied to the preparation of workpieces with large thickness differences, so that this type of workpiece has good flatness, thereby reducing the difficulty of flatness repair of workpieces with complex structural designs.

[0014] In a possible implementation, after the substrate is cut to form a base shell including a main frame and side frames, the method further includes: forming a gap on the side frames and filling the gap with a plastic structure.

[0015] A accommodating compartment is formed on the main frame.

[0016] Among them, the accommodating chamber can be used to accommodate batteries. The formation of the accommodating chamber will introduce thickness differences and cause worsening of the deformation of the main frame. Through the preparation method provided in the embodiment of the present application, an excellent plastic repair effect can be achieved, and the main frame can have excellent flatness.

[0017] The gap can separate the side frame into an antenna radiator, meeting the structural feature design requirements of the workpiece. The formation of the gap will cause the side frame to have weak and strong strength areas, and the large difference in material deformation between the plastic structure in the gap and the side frame structure will lead to the deterioration of deformation at the side frame position. Through the preparation method provided in the embodiment of the present application, the base shell is first heated and then pressed. The heating can reduce the material deformation difference between the side frame and the plastic structure, as well as the strength difference between the strong area and the weak area in the side frame structure, reduce or avoid the problem of plastic structure breakage during the pressing process, so that the side frame can withstand a greater pressing strength, and can also repair a larger deformation, reducing the difficulty of plastic repair in scenes with complex structural designs of the side frame and the main frame, which is conducive to improving the production yield of the workpiece.

[0018] In a possible implementation, placing the base shell in a heating device for heating includes: providing a heating device, wherein the heating device is formed with a plurality of heating grooves, and each heating groove has at least one heating side wall.

[0019] The base shell is placed in one of the heating grooves, the groove bottom of the heating groove heats the main frame body of the base shell, and the heating side wall of the heating groove heats the side of the side frame of the base shell.

[0020] The above method is used to heat the base shell, wherein multiple heating grooves can be used to heat multiple base shells at the same time, ensuring the continuity of processing and improving efficiency. The bottom of the heating groove and the heating side wall can be used to heat the main frame and the side frame, so that the main frame and the side frame can have a higher temperature, and the base shell can be heated evenly, ensuring that the main frame and the side frame can undergo greater and more reliable thermoplastic deformation when pressed together.

[0021] In a possible implementation, the heated base shell is placed in a shaping device for pressing and shaping, including: placing the heated base shell in the shaping device, performing a first pressing and shaping on the first area to be shaped on the side frame and the main frame, and using a cooling device to cool the base shell during the first pressing and shaping process.

[0022] The side frame in the base shell after the first pressing and shaping is cut to reduce the thickness of the side frame, and the thinned side frame has a second area to be shaped, the deformation amount of the second area to be shaped is the second deformation amount, and the second deformation amount is less than the first deformation amount.

[0023] The cut base shell is placed in a heating device for heating, and the heated base shell is placed in a shaping device, and at least the second area to be shaped of the side frame is pressed and shaped for the second time. During the second pressing and shaping process, a cooling device is used to cool the base shell.

[0024] Through the above method, combined with the forming process of the base shell, the side frame is cut at least twice, and heated, pressed and shaped twice and quickly cooled to enhance the plastic deformation of the side frame. That is, in the preparation and production process of the workpiece, at least two actions of heating, pressing and shaping and quickly cooling are respectively deployed, and the flatness is gradually and steadily repaired, which significantly improves the shaping and repair effect of the side frame, and can also further reduce or avoid the problem of plastic structure breakage during the pressing process due to strength differences and material deformation differences, and further improve the yield rate of shaping and repair.

[0025] In one possible implementation, after at least the side frame is pressed and shaped for the second time, the method also includes: cutting the outer surface of the side frame of the base shell after the second pressing and shaping, so that the outer side surface of the side frame is cut into an arc surface, and the side frame has a third area to be shaped, the deformation amount of the third area to be shaped is a third deformation amount, and the third deformation amount is less than or equal to the second deformation amount.

[0026] The cut base shell is placed in a heating device for heating, and the heated base shell is placed in a shaping device to perform a third pressing and shaping on at least the third area to be shaped of the side frame, and a cooling device is used to cool the base shell during the third pressing and shaping process.

[0027] The above method allows the side frame to be cut at least three times, and heated, pressed and shaped at least three times, and quickly cooled and finalized. That is, in the preparation and production process of the workpiece, at least three heating, pressing and shaping, and rapid cooling are respectively deployed, and the flatness is gradually and steadily repaired. The side frame can achieve a better shaping and repairing effect, and can better avoid the problem of easy breakage of the plastic structure during the pressing and shaping process, so that the workpiece has better flatness and yield. The shaping and repairing method has better universality and can solve the problem of deformation repair in more demanding workpiece design scenarios.

[0028] In a possible implementation, after the first pressing and shaping of the side frame, the reverse deformation amount of the first area to be shaped is the first reverse deformation amount, after the second pressing and shaping of the side frame, the reverse deformation amount of the second area to be shaped is the second reverse deformation amount, after the third pressing and shaping of the side frame, the reverse deformation amount of the third area to be shaped is the third reverse deformation amount, the first reverse deformation amount is greater than the second reverse deformation amount, and the second reverse deformation amount is greater than the third reverse deformation amount. In this way, combined with the deformation amount law during the side frame molding process, the shaping and repair amount of the area to be shaped of the side frame in the three shapings is reasonably allocated, and the shaping and repair of the side frame is realized in a gradient manner, which avoids the problem of easy breakage of the plastic structure during the shaping and pressing of the side frame, and significantly improves the shaping effect.

[0029] In a possible implementation, the first reverse deformation is 0.8 mm to 1.0 mm, the second reverse deformation is 0.3 mm to 0.5 mm, and the third reverse deformation is 0.2 mm to 0.4 mm. A larger deformation can be repaired, and the workpiece formed after the above three pressing and shaping can have excellent flatness.

[0030] In a possible implementation, the heated base shell is placed in a shaping device to press and shape the area to be shaped, including: placing the base shell in a positioning groove of a lower mold structure of the shaping device.

[0031] A detachable pressurizing component is arranged on one side of the upper mold structure of the shaping device facing the lower mold structure, and the pressurizing component is adjusted to be opposite to the area to be shaped of the base shell.

[0032] The upper mold structure is moved to press the pressurizing component onto the area to be shaped of the base shell.

[0033] When the area to be shaped of the base shell is pressed and shaped by the above method, due to the detachable setting of the pressurizing component, the position and number of the pressurizing component can be adjusted according to the position of the area to be shaped on the base shell and the structure of the base shell, so that the pressurizing component is relative to the area to be shaped to obtain the optimal deformation repair state, which is conducive to improving the flexibility of the shaping and repair, and is convenient for adjusting the poor shaping of various flatness points. It can also make corresponding pressing adjustments according to the different flatness states of the base shell in each molding stage, which is easy to implement and also conducive to improving the repair effect.

[0034] The second aspect of the embodiment of the present application provides a workpiece, which is used in electronic equipment, and the workpiece is made by any of the above-mentioned preparation methods. The workpiece is prepared by the above-mentioned preparation method, which has excellent repair ability, can realize the repair of the workpiece deformation during the processing, has a good repair effect, and the prepared workpiece has a high flatness.

[0035] In a possible implementation, the workpiece includes a main frame and a side frame. The side frame is located on one side of the main frame, and the side frame is protruded from the main frame.

[0036] The side frame is a metal part with a gap on it, which divides the side frame into multiple antenna radiators and is filled with a plastic structure. The workpiece can have excellent flatness while enriching the structural design of the workpiece and meeting the complex and demanding structural design requirements of the workpiece.

[0037] In a possible implementation, the extending direction of the slit is perpendicular to the main frame, which simplifies the structural design and molding difficulty of the slit.

[0038] A third aspect of the embodiments of the present application provides an electronic device, including a first middle frame, which is made by any of the above-mentioned preparation methods. By including the first middle frame, which is made by the above-mentioned preparation method, the first middle frame has a high flatness, which is conducive to improving the stability and aesthetics of the electronic device.

[0039] In a possible implementation, the electronic device further includes a second middle frame and a rotating device, wherein the rotating device is located between the first middle frame and the second middle frame, and the first middle frame and the second middle frame are rotated together through the rotating device so that the first middle frame and the second middle frame are relatively folded or unfolded. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 A schematic diagram of a shaping solution in the related art;

[0041] Figure 2 It is a schematic diagram of another shaping solution in the related art;

[0042] Figure 3 A schematic diagram of the structure of an electronic device in a flattened state provided in an embodiment of the present application;

[0043] Figure 4 A schematic diagram of the structure of an electronic device in an intermediate state provided by an embodiment of the present application;

[0044] Figure 5 A schematic diagram of the structure of an electronic device in a folded state provided by an embodiment of the present application;

[0045] Figure 6 A schematic diagram of the structure of a workpiece provided in an embodiment of the present application;

[0046] Figure 7 A schematic top view of a local structure of a workpiece provided in an embodiment of the present application;

[0047] Figure 7a A schematic side view of a workpiece provided in an embodiment of the present application;

[0048] Figure 8 A schematic diagram of a workpiece preparation method provided in an embodiment of the present application;

[0049] Fig. 9 A schematic diagram of the structure of a base shell provided in an embodiment of the present application;

[0050] Fig.10 A simulation result diagram of a base shell plastic repair provided in an embodiment of the present application;

[0051] Fig.11 A schematic diagram of the cooperation between a base shell and a heating device provided in an embodiment of the present application;

[0052] Fig.12 A schematic diagram of the cooperation between a plurality of base shells and a heating device provided in an embodiment of the present application;

[0053] Fig.13 A schematic diagram of the cooperation between a base shell and a shaping device provided in an embodiment of the present application;

[0054] Fig.14 Another schematic diagram of the cooperation between a base shell and a shaping device provided in an embodiment of the present application;

[0055] Fig.15 A schematic diagram of a top view of a base shell during the first pressing and shaping process provided in an embodiment of the present application;

[0056] Fig.15a for Fig.15 A magnified view of the local structure in

[0057] Fig.16 A schematic diagram of the structure of a base shell during the second pressing and shaping provided in an embodiment of the present application;

[0058] Fig.16a for Fig.16 A magnified view of the local structure in

[0059] Fig.17 A schematic diagram of the structure of a base shell provided in an embodiment of the present application during the third pressing and shaping;

[0060] Fig.17a An enlarged view of the local structure of a base shell provided in an embodiment of the present application during the third pressing and shaping;

[0061] Fig.18 A process flow chart of a workpiece preparation process provided in an embodiment of the present application.

[0062] Description of reference numerals:

[0063] 100- electronic equipment;

[0064] 101- first middle frame;

[0065] 111-main frame;

[0066] 121-side frame; 121a, 111a-first area to be shaped; 121b-second area to be shaped; 121c-third area to be shaped; 121d-antenna radiator;

[0067] 122-gap;

[0068] 123-Plastic structure;

[0069] 124-accommodation chamber; 124a-first side wall; 124b-second side wall; 124c-third side wall; 124d-fourth side wall;

[0070] 102-second middle frame; 103-rotating device;

[0071] 104- Flexible display screen;

[0072] 105- camera module; 106- end cover;

[0073] 110-workpiece; 120-base shell;

[0074] 200-heating device; 201-heating tank; 202-heating side wall; 203-tank bottom;

[0075] 300-shaping device;

[0076] 301-upper die structure; 311-threaded hole;

[0077] 302-lower die structure; 312-positioning groove;

[0078] 303-pressing component; 304-pressing rod; 305-soft rubber pressing head;

[0079] 400-Cooling device. DETAILED DESCRIPTION

[0080] The terms used in the implementation section of this application are only used to explain the specific embodiments of this application and are not intended to limit this application.

[0081] The present application provides a method for preparing a workpiece, which is used for preparing a workpiece, and the workpiece can be applied to an electronic device. The electronic device may include but is not limited to a mobile phone, a portable android device (PAD), a notebook computer (NoteBook), an ultra-mobile personal computer (UMPC), a walkie-talkie, a netbook, a POS (point of sales) machine, a personal digital assistant (PDA), a wearable device, a virtual reality (VR) device, an augmented reality (AR) device, a television, a vehicle-mounted terminal, etc.

[0082] The workpiece in the embodiment of the present application includes parts in the industrial processing process. The workpiece can be a single part, or a workpiece can be a component formed by a combination of several parts, etc. The embodiment of the present application does not limit this. In the embodiment of the present application, the workpiece of the electronic device can be a part of the electronic device that is fully or partially exposed to the external environment. For example, the workpiece can be the middle frame of a mobile phone, the shell of a laptop computer, etc.

[0083] In the embodiment of the present application, the workpiece is the middle frame of the mobile phone as an example, and the molding material of this type of workpiece is mostly metal material, for example, the middle frame can be a stainless steel or aluminum alloy workpiece. Usually the middle frame is made of a whole piece of metal plate as the substrate, and various detail features are cut by a computer numerical control machine tool (computer number control, referred to as CNC), and then formed by injection molding, grinding, polishing, etc. When cutting to gradually remove the metal material, the stress inside the metal plate will be released, resulting in a great change in the flatness of the workpiece. Especially when a region with a thickness difference, a stress center offset, etc. is formed on the workpiece, such as a thinner plane main frame formed by a substrate and a thicker side frame protruding on one side of the main frame, the side frame and the main frame have a large thickness difference, and the main frame formed is not located at the center of the substrate, which often leads to more serious stress deformation during CNC machining and cutting, deteriorating the flatness of the workpiece.

[0084] Figure 1 Schematic diagram of a shaping solution in the related art. Figure 2 It is a schematic diagram of another shaping solution in the related art.

[0085] Therefore, after the workpiece is processed and formed, it will be repaired to repair the uneven area as much as possible and improve the flatness of the workpiece. The usual repair solution is reverse deformation repair, for example, see Figure 1 As shown, a shaping jig 1 is used, which may include an upper mold structure 11 and a lower mold structure 12. The workpiece 2 to be repaired is placed on the lower mold structure 12, and the upper mold structure 11 is pressed onto the workpiece 2 to be repaired. The upper mold structure 11 applies pressure (opposite to the deformation direction) to the uneven area (deformation area) so that the uneven area undergoes reverse deformation, and the deformation includes elastic deformation and a certain plastic deformation. After the pressing is maintained for a preset time, the upper mold structure 11 is removed, and the elastic deformation of the uneven area will rebound. The plastic deformation that occurs can achieve the purpose of repairing the uneven area and make it have better flatness. However, the degree of repairability of deformation by pressing repair at room temperature is limited, the repair effect is poor, and the pressing process is relatively long. When the pressing exceeds a certain degree, it is also easy to cause the workpiece 2 to be repaired to break.

[0086] There are also solutions for thermal plastic repair in the related art, for example, see Figure 2 As shown, the shaping jig 3 includes a thermal shaping device, and a heat pipe 34 is arranged in the upper mold structure 32 and the lower mold structure 33 of the thermal shaping device. The heat pipe 34 can heat the upper mold structure 32 and the lower mold structure 33 to a predetermined temperature, and the workpiece 2 to be repaired is placed on the hot lower mold structure 33, and the hot upper mold structure 32 is pressed on the workpiece 2 to be repaired, and reverse deformation pressure is applied to the uneven area to achieve thermal shaping of the repaired workpiece 2. After shaping, the workpiece is removed and placed in a cooling device (not shown in the figure) for cooling. By pressing the workpiece together with the hot upper mold structure 32 and the lower mold structure 33, the workpiece undergoes a large plastic deformation, which is conducive to improving the degree of repair. However, in this repair scheme, the pressing and holding time of the workpiece to be repaired is relatively long, resulting in a reduction in the number of workpieces that can be repaired per unit time, and a low repair efficiency.

[0087] Based on this, the embodiment of the present application provides a method for preparing a workpiece, which first heats the workpiece to be repaired, and then places the heated workpiece to be repaired in a shaping device for pressing and shaping, so that the hot workpiece to be repaired can undergo greater plastic deformation, and is quickly cooled and shaped during the shaping and pressing process, so as to obtain greater and more reliable plastic deformation and improve the shaping and repair effect. Moreover, heating first and then pressing the hot workpiece to be repaired can obtain excellent repair effects in a shorter pressing and holding time, reduce the pressing and holding time, and significantly improve the repair efficiency.

[0088] Illustratively, in the embodiment of the present application, the workpiece may be a middle frame of a mobile phone, and the mobile phone may be a candy bar phone, or the mobile phone may be a folding phone.

[0089] Taking the mobile phone as a folding machine as an example, the folding machine can be a folding machine with a display screen folded inwards, or the folding machine can also be a folding machine with a display screen folded outwards.

[0090] Figure 3 A schematic diagram of the structure of an electronic device in a flattened state provided in an embodiment of the present application.

[0091] In the embodiment of the present application, a folding machine with a display screen folded outward is taken as an example. Figure 3 As shown, the electronic device 100 may include a first middle frame 101 and a second middle frame 102 .

[0092] The electronic device 100 may further include a rotating device 103, which may be a hinge assembly, a shaft assembly, etc. The first middle frame 101 and the second middle frame 102 may be located on both sides of the rotating device 103, and the first middle frame 101 and the second middle frame 102 are respectively connected to the rotating device 103. The first middle frame 101 and the second middle frame 102 may be rotationally matched through the rotating device 103, so that the first middle frame 101 and the second middle frame 102 can rotate relative to each other, so that the first middle frame 101 and the second middle frame 102 can be folded or unfolded relative to each other.

[0093] See also Figure 3 As shown, the first middle frame 101 and the second middle frame 102 can be relatively unfolded to an open state. Exemplarily, when the first middle frame 101 and the second middle frame 102 are in the open state, the two can be approximately 180° (a slight deviation is also allowed), and the electronic device 100 is in the open state, also called the flat state.

[0094] Figure 4 A schematic diagram of the structure of an electronic device in an intermediate state provided in an embodiment of the present application.

[0095] See also Figure 4 As shown, the first middle frame 101 and the second middle frame 102 can be relatively rotated (folded or unfolded) to an intermediate state, so that the electronic device 100 is in the intermediate state.

[0096] Figure 5 A schematic diagram of the structure of an electronic device in a folded state provided in an embodiment of the present application.

[0097] See also Figure 5 As shown, the first middle frame 101 and the second middle frame 102 can be folded relative to each other to a closed state. For example, when the first middle frame 101 and the second middle frame 102 are in the closed state, the two can be completely closed to be parallel to each other (a slight deviation is also allowed). At this time, the electronic device 100 is in a closed state, also called a folded state.

[0098] in, Figure 4 The intermediate state shown may be any state between the open state and the closed state, that is, the electronic device 100 can switch between the open state (i.e. the flattened state) and the closed state (i.e. the folded state) by the movement of the rotating device 103 .

[0099] In the embodiment of the present application, when the electronic device 100 is in a flat state or a folded state, the width direction of the electronic device 100 is the x direction, the length direction of the electronic device 100 is the y direction, and the thickness direction of the electronic device 100 is the z direction (refer to Figure 3 shown).

[0100] It should be noted that the electronic device 100 may include only two middle frames, such as the first middle frame 101 and the second middle frame 102 may both be one, so that when the electronic device 100 is in a folded state, the first middle frame 101 and the second middle frame 102 are relatively folded into two layers. Figure 5 As shown, the electronic device 100 includes a first middle frame 101, a second middle frame 102 and a rotating device 103. The first middle frame 101 and the second middle frame 102 are rotatably connected via the rotating device 103. The first middle frame 101 and the second middle frame 102 are folded relative to each other, so that the electronic device 100 is in a two-layer form.

[0101] Alternatively, the electronic device 100 may also include multiple middle frames, such as the number of the first middle frame 101 and the second middle frame 102 may be multiple, the number of the rotating devices 103 may also be multiple, and the adjacent first middle frames 101 and second middle frames 102 are connected by a rotating device 103, so that the electronic device 100 can be folded into a multi-layer form. For example, the electronic device 100 may include two first middle frames 101, one second middle frame 102 and two rotating devices, the two first middle frames 101 are located on both sides of the second middle frame 102, and the two first middle frames 101 are respectively rotatably connected to the second middle frame 102 by a rotating device, one of the first middle frames 101 can be folded relative to the second middle frame 102, and the other first middle frame 101 can also be folded relative to the second middle frame 102, so that when the electronic device 100 is in a folded state, the first middle frame 101 and the second middle frame 102 are folded relative to each other into a three-layer form.

[0102] Combination Figures 3 to 5 As shown, the electronic device 100 may also include a foldable flexible display screen 104, wherein the flexible display screen 104 is located on the rotating device 103, the first middle frame 101 and the second middle frame 102. Specifically, the flexible display screen 104 may be arranged on the same side surface of the first middle frame 101, the second middle frame 102 and the rotating device 103.

[0103] Among them, for the foldable electronic device 100 with the display screen folded outward, the flexible display screen 104 is arranged on the outer surfaces of the first middle frame 101, the second middle frame 102 and the rotating device 103.

[0104] It should be noted that when the electronic device 100 is in a folded state, the two adjacent and opposite surfaces of the first middle frame 101 and the second middle frame 102 are the inner surfaces of the first middle frame 101 and the second middle frame 102, and the surface of the rotating device 103 on the same side as the inner surfaces of the first middle frame 101 and the second middle frame 102 is the inner surface of the rotating device 103. The two opposite surfaces of the first middle frame 101 and the second middle frame 102 are the outer surfaces of the first middle frame 101 and the second middle frame 102, and the surface of the rotating device 103 on the same side as the outer surfaces of the first middle frame 101 and the second middle frame 102 is the outer surface of the rotating device 103.

[0105] It is to be understood that the structure illustrated in the embodiment of the present application does not constitute a specific limitation on the electronic device 100. In other embodiments of the present application, the electronic device 100 may include more or fewer components than shown, or combine certain components, or separate certain components, or arrange the components differently. For example, the electronic device 100 may also include devices such as a camera module 105, a flash, a sensor, a processor, and a drive structure.

[0106] Among them, at least one of the first middle frame 101 and the second middle frame 102 can be a workpiece. In the embodiment of the present application, the first middle frame 101 is taken as an example as a workpiece.

[0107] Figure 6 A schematic diagram of the structure of a workpiece provided in an embodiment of the present application.

[0108] For some examples, see Figure 6 As shown, taking the first middle frame 101 as the workpiece 110 as an example, the first middle frame 101 may include a main frame body 111 and a side frame 121, and the side frame 121 is located at a side edge of the main frame body 111. Specifically, the side frame 121 may be located on a side of the main frame body 111 away from the rotating device.

[0109] The side frame 121 may be arranged to protrude from the main frame 111, and the thickness (height in the thickness z direction) of the side frame 121 may be greater than the thickness of the main frame 111. Figure 5 As shown, an end cover 106 may be provided on the side frame 121 , and the end cover 106 and the side frame 121 may together enclose a receiving space, and the receiving space may be used to receive various structural components of the electronic device 100 .

[0110] For example, see Figure 5 As shown, the camera module 105, the flash (not shown in the figure), etc. can be arranged in the accommodating space surrounded by the end cover 106 and the side frame 121, which can prevent the camera module 105, the flash, etc. from occupying the space on the display surface of the electronic device 100, which is beneficial to improving the screen-to-body ratio of the electronic device 100.

[0111] The flexible display screen 104 and the side frame 121 can be respectively located on two opposite surfaces of the main frame body 111 along the thickness direction. For example, in an electronic device 100 with a foldable display screen, the flexible display screen 104 can be located on the outer surface of the main frame body 111, and the side frame 121 can be located on the inner surface of the main frame body 111.

[0112] Continue to see Figure 6 As shown, the first middle frame 101 may also have a first side wall 124a, a second side wall 124b, a third side wall 124c and a fourth side wall 124d (see Figure 6 As shown in FIG. 1 , the first side wall 124a, the second side wall 124b, the third side wall 124c and the fourth side wall 124d may be arranged to protrude from the main frame body 111, the first side wall 124a and the second side wall 124b may be opposite to each other in the width x direction, the third side wall 124c and the fourth side wall 124d may be opposite to each other in the length y direction, and the fourth side wall 124d may be closer to the rotating device 103. The first side wall 124a, the second side wall 124b and the third side wall 124c may together enclose a receiving compartment 124, and the receiving compartment 124 may be used to receive a battery of the electronic device 100.

[0113] In order to achieve the thinning of the first middle frame 101 , the thickness of the main frame body 111 is relatively thin, so that there is also a thickness difference between the side wall surrounding the accommodating chamber 124 and the main frame body 111 .

[0114] The side frame 121 may be a metal part. Figure 6 As shown, a plurality of slots 122 may be provided on the side frame 121, and the slots 122 may penetrate the side frame 121. The plurality of slots 122 may separate the side frame 121 into a plurality of antenna radiators (see Figure 7 As shown), the gap 122 may be filled with a plastic structure 123.

[0115] Figure 7 This is a schematic top view of a partial structure of a workpiece provided in an embodiment of the present application. Figure 7 The side frame gap 122 is shown as not being filled with a plastic structure.

[0116] It should be noted that, combined with Figure 7 As shown, there may be a plurality of gaps 125 between the side frame 121 and the main frame body 111 , and the plurality of gaps 125 may be connected to the plurality of gaps 122 to meet the functional requirements of the antenna radiator 121 d , and the gaps 125 may also be filled with a plastic structure.

[0117] Among them, see Figure 7As shown, the widths (lengths along the width x direction) of the antenna radiators 121d formed by the side frame 121 may be different, so that the side frame 121 is formed with a weak strength area 121e and a strong strength area 121f. Figure 7 The three slits 122 on the middle side frame 121 divide the side frame 121 into four antenna radiators 121d. The width of the four antenna radiators 121d is as follows: Figure 7 As shown in , the unit is mm, the widths of different antenna radiators 121d, or the widths of the same antenna radiator 121d at different positions are not exactly the same, resulting in the side frame 121 having a weak area 121e and a strong area 121f.

[0118] Of course, in some other examples, the second middle frame 102 may also be the workpiece 110, or one of the first middle frame 101 and the second middle frame 102 may be the workpiece 110. It should be noted that, in some other examples, the first middle frame 101 and the second middle frame 102 may also only include the main frame body 111, without the protruding side frame 121, that is, the first middle frame 101 and the second middle frame 102 may be frame structures with relatively uniform thickness.

[0119] As mentioned above, in scenarios where there is a large difference in thickness of the workpiece 110 or a shift in the stress center, the flatness of the workpiece 110 will be seriously deteriorated.

[0120] Figure 7a A schematic side view of a workpiece provided in an embodiment of the present application.

[0121] For example, the first middle frame 101 is used as the workpiece 110, see Figure 7a As shown, if a metal plate is used as the substrate 130 ( Figure 7a The dotted line in the middle is a schematic diagram of the substrate) and is processed by CNC cutting to form a workpiece 110. The side frame 121 of the workpiece 110 is located on one side of the main frame 111, and the side frame 121 is protruding from the main frame 111, so that there is a large thickness difference between the side frame 121 and the main frame 111, and the main frame 111 formed after cutting is located at seven-eighths of the original substrate 130, rather than the center of the original substrate 130 (the dotted line o in the figure is the center line of the substrate). The stress center is offset, which will cause the deformation degree at the side frame 121 to deteriorate seriously.

[0122] Alternatively, there is also a large thickness difference between the side wall of the accommodating chamber 124 and the main frame 111. During the process of forming the accommodating chamber 124 by substrate cutting, as the thickness difference is formed, the internal stress is released, and the deformation at the position of the accommodating chamber 124 will also be large, especially the first side wall 124a adjacent to the edge of the main frame 111 (that is, adjacent to the rotating device). The degree of deformation is more serious.

[0123] Therefore, in such scenarios, the conventional room temperature pressing repair scheme or thermal plastic repair scheme mentioned above is adopted. Due to its poor plastic repair effect, the plastic repair effect on the parts with severe deformation is minimal. In addition, since the side frame is a metal part and the filled plastic structure is a plastic part, the strength and plastic deformation of the two are quite different. In addition, there are weak areas and strong areas in the side frame. The conventional room temperature pressing repair scheme or thermal plastic repair scheme mentioned above is adopted. Due to the difference in strength and material deformation, the plastic structure is prone to fracture during the pressing process, especially the plastic structure in the gap of the weak area is more prone to fracture, which increases the difficulty of plastic repair. In the related art, in order to reduce the problem of fracture of the plastic structure, a relatively complex structural design gap is usually opened on the side frame. For example, the gap on the side frame is Z-shaped or staggered to enhance the strength of the plastic structure, which also increases the difficulty of molding the side frame.

[0124] The preparation method provided in the embodiment of the present application can be applied to the flatness repair of the above-mentioned workpieces with thickness differences, stress center offsets, side frame material differences, and strength differences.

[0125] The workpiece preparation method provided in the embodiment of the present application is described below by taking the first middle frame as a workpiece.

[0126] Figure 8 A schematic diagram of a workpiece preparation method provided in an embodiment of the present application.

[0127] See also Figure 8 As shown, the method includes:

[0128] S101: providing a base shell, wherein the base shell has at least one region to be shaped.

[0129] The base shell may be a workpiece to be repaired, and the base shell has a region to be reshaped, that is, a deformed region on the base shell, resulting in uneven flatness of the base shell. For example, the base shell may have a convex hull forming the region to be reshaped, resulting in poor flatness of the entire base shell.

[0130] It should be noted that there may be one region to be reshaped on the base shell, or there may be multiple regions to be reshaped on the base shell. Any deformed region on the base shell may be the region to be reshaped, and this method may be used to achieve reshaping and repair.

[0131] S102: placing the base shell in a heating device for heating.

[0132] The base shell can be heated by a heating device to reach a preset temperature. It should be noted that the heating temperature of the heating device, the preset temperature reached by the base shell, and the heating time can be selected and set according to the molding material of the base shell.

[0133] For example, taking the molding material of the base shell as aluminum alloy, the heating device heats the base shell so that the base shell reaches a preset temperature of 120° to 150°, so that the base shell can achieve a larger and more reliable deformation under subsequent pressing.

[0134] S103: placing the heated base shell in a shaping device to press and shape the area to be shaped, and using a cooling device to cool the base shell during the pressing and shaping process.

[0135] S104: forming a workpiece.

[0136] After the base shell is heated to a preset temperature, the base shell can be removed from the heating device and placed in a shaping device. The shaping device is used to press and shape the area to be shaped on the base shell, such as applying pressure to the area to be shaped to cause reverse elastic deformation and plastic deformation. For example, pressure is applied to the area to be shaped in the form of a convex hull to cause it to deform concavely, and the pressing is maintained for a preset time. In addition, during the pressing and shaping process, a cooling device is used to quickly cool and shape the base shell. The reverse plastic deformation of the area to be shaped can achieve the purpose of shaping and repairing the original deformation of the area, improve the flatness of the workpiece, and obtain a workpiece with higher flatness.

[0137] Moreover, the base shell is first heated to a preset temperature, and then the hot base shell is directly pressed. Compared with pressing at room temperature or pressing through a hot mold, pressing the heated base shell can achieve greater plastic deformation, greater deformation repair ability, and improve the plastic repair effect. In addition, the base shell is quickly cooled and shaped during the pressing process. Compared with cooling after pressing, the degree and stability of plastic deformation can be increased, which can further improve the plastic repair effect.

[0138] The preparation method can achieve excellent shaping and repair effects, and can be suitable for preparing workpieces with stress offset, thickness difference, side frame material difference, and large strength difference, so that this type of workpiece has good flatness. In addition, the base shell is heated before pressing. Heating can reduce the material deformation difference between the side frame and the plastic structure, and the strength difference between the strong area and the weak area in the side frame structure, reduce or avoid the problem of plastic structure breakage during the pressing process, so that the side frame can withstand a greater pressing strength, and can also repair a larger deformation, reducing the difficulty of shaping and repairing at the side frame position, which is beneficial to improving the production yield of the workpiece.

[0139] Using the preparation method of the embodiment of the present application, illustratively, under the condition of avoiding breakage of the plastic structure of the side frame, the area to be shaped can be pressed to cause a deformation of 6 mm. After heating, pressing and shaping, and rapid cooling, the reverse deformation of the area to be shaped can reach 0.8 mm to 1.3 mm. The reverse deformation is the reverse deformation of the area to be shaped after heating, pressing and shaping, and rapid cooling. That is, the 0.8 mm to 1.3 mm deformation of the area to be shaped can be repaired, and the deformation repair capability is stronger.

[0140] It is understandable that after the base shell is pressed, shaped and cooled, after the pressing is removed, the elastic deformation in the area to be shaped will rebound.

[0141] In the embodiment of the present application, the extending direction of the slit on the side frame can be perpendicular to the main frame (refer to Figure 6 and Figure 7 The gap can extend along the thickness z direction from the side of the side frame facing away from the main frame to the side of the side frame facing the main frame. The gap can be a linear gap along the thickness z direction, which simplifies the structural design and molding difficulty of the gap while ensuring that the plastic structure will not break during the pressing and shaping.

[0142] In addition, due to the method of first heating and then pressing the hot base shell and quickly cooling it during pressing, larger and more reliable plastic deformation can be obtained. That is to say, excellent shaping and repair effects can be obtained in a shorter pressing and holding time. The pressing and holding time of the workpiece shaping and repair can be reduced, and the repair efficiency can be significantly improved while ensuring the repair effect.

[0143] For example, in the embodiment of the present application, the base shell may be formed by cutting a metal substrate. That is, the above step S101 may include:

[0144] S1011: Provide a metal substrate.

[0145] For example, taking the workpiece as a mobile phone middle frame as an example, the metal substrate may be a plate-shaped metal substrate, such as an aluminum alloy plate.

[0146] S1012: Cutting the substrate to form a base shell including a main frame and side frames, wherein at least one of the main frame and the side frames has a first area to be shaped.

[0147] For example, the base material may be cut and processed by CNC machining to form the base shell.

[0148] Fig. 9 A schematic diagram of the structure of a base shell provided in an embodiment of the present application.

[0149] See also Fig. 9As shown, the side frame 121 is located on one side of the main frame 111, and the side frame 121 protrudes outward from one side of the main frame 111. That is, the height of the side frame 121 in the thickness z direction is greater than the height of the main frame 111, so that there is a thickness difference between the side frame 121 and the main frame 111. The substrate is cut to form the above-mentioned side frame 121 and the main frame 111. Due to the thickness difference and center offset, at least one of the side frame 121 and the main frame 111 of the base shell 120 has a first area to be shaped. For example, the side frame 121 may have a first area to be shaped 121a, and the main frame 111 may have a first area to be shaped 111a.

[0150] The deformation amount of the first area to be shaped is the first deformation amount. It should be noted that the first deformation amount refers to the degree of deformation of the first area to be shaped after the substrate is cut to form the above-mentioned side frame 121 and main frame 111, for example, the first area to be shaped of the side frame 121 has a deformation amount of about 0.8 mm to 1.0 mm.

[0151] Wherein, after step S1012, the method may further include:

[0152] S1013: forming a gap on the side frame and filling the gap with a plastic structure.

[0153] See also Fig. 9 As shown, a gap 122 is formed on the side frame 121 having the first area 121a to be shaped, and a plastic structure 123 is filled in the gap 122. It should be noted that the side frame 121 has the gap 122, and the gap 122 may not penetrate the side frame 121. For example, the side frame 121 also includes a structure 126 to be removed, and the structure 126 to be removed may be located on the outside of the gap 122 (the side facing away from the accommodation chamber 124). This is beneficial to improving the strength of the side frame 121 and facilitating the pressing and shaping of the side frame 121.

[0154] S1014: A storage compartment may be formed on the main frame.

[0155] See also Fig. 9 As shown, a first side wall 124a, a second side wall 124b, a third side wall 124c and a fourth side wall 124d are formed on the main frame 111. The first side wall 124a, the second side wall 124b, the third side wall 124c and the fourth side wall 124d can enclose a receiving chamber 124. Due to the difference in thickness between the side walls and the main frame 111, the position of the receiving chamber 124 is prone to deformation, especially the position of the first side wall 124a near the rotating device, as shown in FIG. Fig. 9 The first side wall 124 a has a first area 111 a to be shaped.

[0156] It should be noted that there is no limitation on the order of step S1013 and step S1014 , and in some examples, both can be implemented simultaneously.

[0157] Fig.10 This is a simulation result diagram of a base shell plastic repair provided in an embodiment of the present application. Fig.10 The middle curve S1 is the deformation curve of the base shell to be shaped by the preparation method provided in the embodiment of the present application, and the curve S2 is the deformation curve of the base shell to be shaped by the normal temperature repair scheme. The horizontal axis is the pressing time, and the vertical axis is the deformation displacement of the area to be shaped.

[0158] Using the preparation method provided in the embodiment of the present application, the base shell is reshaped and repaired. The base shell is first heated to reduce the yield resistance of the base shell, so that it can withstand greater deformation displacement, provide greater anti-deformation, and repair greater deformation. Fig.10 As shown, the area to be shaped can be pressed to produce a deformation greater than 3mm. After pressing, shaping and cooling, the first area to be shaped on the side frame can produce a reverse deformation of about 1.3mm, that is, the deformation of about 1.3mm in the first area to be shaped on the side frame can be repaired, and the first area to be shaped on the main frame can produce a reverse deformation of about 0.5mm, that is, the deformation of about 0.5mm in the first area to be shaped on the main frame can be repaired.

[0159] The above-mentioned normal temperature repair scheme is used to simulate the repair of the base shell. The deformation of the plastic area during the pressing process can only be 3mm. The load pressure during the pressing process can be 220N, and the reverse deformation that can be achieved is within 0.45mm (or 0.5mm), that is, the repairable deformation is within 0.45mm. Moreover, according to the normal temperature repair scheme, the plastic structure of the side frame is very easy to break when the plastic area is pressed to produce a deformation of 3mm.

[0160] In order to further improve the plastic surgery and repair effect, to better apply to the above-mentioned workpieces with stress center offset, thickness difference, material difference and strength difference, and to improve their flatness, the above-mentioned preparation method has been optimized.

[0161] In the step S102 of the above preparation method, the base shell is placed in a heating device for heating, including:

[0162] S1021: Provide a heating device, wherein the heating device has a plurality of heating slots, and each heating slot has at least one heating side wall.

[0163] Fig.11 A schematic diagram of the cooperation between a base shell and a heating device provided in an embodiment of the present application, Fig.12 A schematic diagram of the coordination of multiple base shells and a heating device provided in an embodiment of the present application.

[0164] Combination Fig.11 and Fig.12 As shown, the heating device 200 may include a plurality of parallel heating slots 201, and each heating slot 201 may include at least one heating sidewall 202. For example, each heating slot 201 includes a heating sidewall 202, and the heating sidewall 202 may be located above the slot bottom 203 of the heating slot 201, and the heating sidewall 202 may be located on one side of the slot bottom 203 of the heating slot 201. Multiple heating slots 201 can heat multiple base shells 120 at the same time, ensuring the continuity of processing and improving efficiency.

[0165] S1022: placing the base shell in one of the heating grooves, the bottom of the heating groove heats the main frame of the base shell, and the heating side walls of the heating groove heat the side surfaces of the side frames of the base shell.

[0166] For example, see Fig.11 As shown, the base shell 120 is placed in one of the heating grooves 201 of the heating device 200, the main frame 111 of the base shell 120 can be fitted with the groove bottom 203 of the heating groove 201, and the outer side surface (the side facing away from the containing chamber) of the side frame 121 of the base shell 120 can be fitted with the heating side wall 202 of the heating groove 201.

[0167] The main frame 111 and the side frame 121 can be heated well by the groove bottom 203 and the heating side wall 202 of the heating groove 201, so that both the main frame 111 and the side frame 121 can have a higher temperature, thereby achieving uniform heating of the base shell 120, and ensuring that the main frame 111 and the side frame 121 can undergo larger and more reliable thermoplastic deformation when pressed together.

[0168] Fig.13 A schematic diagram of the cooperation between a base shell and a shaping device provided in an embodiment of the present application is shown in FIG. Fig.14 Another schematic diagram of the cooperation between a base shell and a shaping device provided in an embodiment of the present application.

[0169] Combination Fig.13 and Fig.14 As shown, the shaping device 300 may include a lower mold structure 302 and an upper mold structure 301, wherein the upper mold structure 301 may be located on one side of the lower mold structure 302, the lower mold structure 302 is used to support the base shell 120, and the upper mold structure 301 is used to cooperate with the lower mold structure 302 to fix and press the base shell 120.

[0170] A positioning groove 312 is provided on the lower mold structure 302 , and the positioning groove 312 can realize the support and positioning of the base shell 120 . The base shell 120 is fixedly disposed in the positioning groove 312 .

[0171] The shaping device 300 may also include a pressurizing component 303, and there may be multiple pressurizing components 303. Multiple pressurizing components 303 may be arranged on the side of the upper mold structure 301 facing the lower mold structure 302. The pressurizing component 303 is used to apply pressure to the area to be shaped of the base shell 120 to cause the area to be shaped to deform in the opposite direction.

[0172] The pressurizing assembly 303 and the upper mold structure 301 can be assembled and fixed in a detachable manner, so that the position and number of the pressurizing assembly 303 are more flexible. For example, the specific position of the pressurizing assembly 303 on the side of the upper mold structure 301 facing the lower mold structure 302, the number of the pressurizing assembly 303, etc. can be adjusted. In this way, the pressurizing assembly 303 can be adjusted according to the position of the area to be shaped, etc., to obtain the optimal pressure deformation repair posture, and corresponding pressing adjustment can be made according to the different flatness states of the base shell 120 at each molding stage, which is easy to implement.

[0173] Exemplarily, the pressurizing assembly 303 may include a press rod 304 and a soft glue press head 305, one end of the press rod 304 is detachably connected to the upper mold structure 301, and the soft glue press head 305 is fixed to the other end of the press rod 304, and the soft glue press head 305 contacts the area to be shaped of the base shell 120 and presses the base shell 120.

[0174] Among them, the detachable connection method between one end of the pressure rod 304 and the upper mold structure 301 can be a threaded connection, a snap connection, a buckle point hanging, etc. For example, in some examples, a plurality of threaded holes 311 can be opened on the upper mold structure 301, and the outer wall of one end of the pressure rod 304 has a threaded structure (not shown in the figure) that cooperates with the threaded hole 311, and one end of the pressure rod 304 is threadedly matched with the threaded hole 311, thereby achieving detachability.

[0175] Continue to combine Fig.13 and Fig.14 As shown, the cooling device 400 can be located on one side of the shaping device 300. The cooling device 400 can have an air outlet, and the air outlet can be opposite to the base shell 120 placed in the positioning groove 312. When the shaping device 300 presses the base shell 120, the cooling device 400 can be used to achieve rapid cooling and shaping of the base shell 120.

[0176] Based on the above shaping device, in step S103 of the above preparation method, placing the heated base shell in the shaping device to press and shape the area to be shaped may include:

[0177] S1031: placing the base shell in the positioning groove of the lower mold structure of the shaping device.

[0178] S1032: a detachable pressurizing component is disposed on a side of the upper mold structure of the shaping device facing the lower mold structure, and the pressurizing component is adjusted to be opposite to the area to be shaped of the base shell.

[0179] Specifically, the position and number of the pressurizing components can be adjusted according to the position of the area to be reshaped on the base shell and the structure of the base shell, so that the pressurizing components are relative to the area to be reshaped to obtain the optimal deformation repair state, which is conducive to improving the flexibility of reshaping and repair, facilitating the adjustment of poor reshaping of various flatness points, and also conducive to improving the repair effect.

[0180] S1033: The upper mold structure is moved to press the pressurizing component onto the area to be shaped of the base shell.

[0181] The pressure component can be used to apply pressure to the area to be shaped, causing the area to undergo reverse elastic deformation and plastic deformation, thereby repairing the deformation of the area to be shaped.

[0182] The shaping device may also include a driving mechanism, such as a servo motor, which may be connected to the upper mold structure, and can drive and control the upper mold structure and the pressurizing assembly to press the base shell, thereby causing reverse deformation of the base shell and achieving precise control.

[0183] In order to further enhance the shaping and repair effect of workpieces with stress center offset, thickness difference, material deformation difference and strength difference, the forming process of the workpiece can also be combined, and the implementation of heating, pressing and shaping and rapid cooling can be deployed multiple times in the forming production process of the workpiece, so as to realize multiple dispersed shaping of the shaping area, gradually and sequentially and stably repair the flatness, which can repair a larger deformation and improve the shaping and repair effect.

[0184] Exemplarily, in step S103 of the above preparation method, placing the heated base shell in a shaping device for pressing and shaping may also include:

[0185] S103a: placing the heated base shell in a shaping device, performing a first pressing and shaping on the side frame and the first area to be shaped on the main frame, and using a cooling device to cool the base shell during the first pressing and shaping process.

[0186] Fig.15 A schematic diagram of a top view of a base shell during the first pressing and shaping process provided in an embodiment of the present application. Fig.15a for Fig.15 A magnified view of the local structure.

[0187] Combination Fig.15 and Fig.15aAs shown, after the substrate is formed into a base shell 120 having a main frame 111 and a side frame 121 by cutting or the like, the main frame 111 and the side frame 121 may respectively have a first area to be shaped 111a and a first area to be shaped 121a. For example, the side frame 121 and the accommodating bin 124 may respectively have a first area to be shaped 121a and a first area to be shaped 111a.

[0188] At this time, the structural strength of the base shell 120 is relatively strong, and the deformation produced is relatively uniform. For example, the first deformation amount of the first area to be shaped may be approximately 0.8 mm to 1.0 mm.

[0189] See also Fig.15a As shown, the side frame 121 is formed, and the gap 122 thereon may not penetrate the side frame 121, such as there is a structure 126 to be removed outside the gap 122. Of course, in some other examples, the side frame 121 and the gap 122 are formed before the first lamination and shaping, and the gap 122 may also penetrate the side frame 121.

[0190] After the base shell 120 is heated, it is placed in a shaping device. The shaping device can be used to perform a first pressing and shaping on the first areas to be shaped of the main frame 111 and the side frame 121, respectively, and ensure rapid cooling during the first pressing and shaping process, so as to achieve a one-time repair and shaping of the main frame 111 and the side frame 121.

[0191] After the first pressing and shaping of the side frame 121, the reverse deformation amount of the first shaping area 121a of the side frame 121 is the first reverse deformation amount. The first reverse deformation amount refers to the reverse deformation degree of the first shaping area 121a after heating, the first pressing and shaping and rapid cooling.

[0192] It is understandable that after heating, pressing and shaping and rapid cooling, when the amount of reverse deformation of the area to be shaped is approximately equal to the amount of deformation of the area to be shaped, the area to be shaped can be repaired to obtain excellent flatness. In actual production, there may be a certain range of errors. For example, if the difference between the amount of reverse deformation and the amount of deformation is within 0.1 mm, excellent flatness can be obtained.

[0193] S103b: cutting the side frame in the base shell after the first pressing and shaping to reduce the thickness of the side frame.

[0194] Fig.16 A schematic diagram of the structure of a base shell during the second pressing and shaping provided in an embodiment of the present application, Fig.16a for Fig.16 A magnified view of the local structure.

[0195] After the first pressing and shaping, the side frame 121 is cut, such as by cutting to reduce the thickness of the side frame 121. Fig.16 and Fig.16a As shown, since further cutting processing will lead to the release of stress again, the side frame 121 after cutting and thinning has a second area 121b to be reshaped.

[0196] It is understandable that the side frame 121 has been pressed and shaped for the first time, and its flatness has been adjusted, so the deformation caused by the stress released by the second cutting process will be relatively small. The deformation amount of the second area 121b to be shaped is the second deformation amount, which refers to the degree of deformation of the second area 121b to be shaped after the cutting process to thin the side frame 121. The second deformation amount can be less than the first deformation amount. For example, the second deformation amount of the second area 121b to be shaped can be about 0.3mm to 0.5mm.

[0197] See also Fig.16a As shown, the structure 126 to be removed outside the slit 122 of the side frame 121 can be partially removed, and the slit 122 may still not penetrate the side frame 121, which is conducive to improving the strength of the second lamination shaping. Of course, in some other examples, the side frame 121 can be cut to be thinned after the first lamination shaping, and the structure 126 to be removed outside the slit 122 on the side frame 121 is removed, so that the slit 122 penetrates the side frame 121.

[0198] S103c: placing the cut base shell in a heating device for heating, placing the heated base shell in a shaping device, performing a second pressing and shaping on at least the second area to be shaped of the side frame, and using a cooling device to cool the base shell during the second pressing and shaping process.

[0199] The base shell 120 with the second area 121b to be shaped is heated again, and at least the second area 121b to be shaped of the side frame 121 is pressed and shaped for the second time, and rapid cooling and shaping are ensured during the second pressing and shaping process. In other words, in combination with the forming process of the base shell 120, the side frame 121 is cut at least twice, and is heated, pressed and shaped twice, and rapidly cooled and shaped twice, that is, in the preparation and production process of the workpiece, at least two actions of heating first, pressing and shaping, and rapidly cooling are respectively deployed, and the flatness is gradually and steadily repaired, the plastic deformation of the side frame 121 is enhanced, and the shaping and repairing effect of the side frame 121 is significantly improved, and the problem of the plastic structure 123 breaking during the pressing process due to the difference in strength can be further reduced or avoided, and the yield rate of shaping and repair is further improved.

[0200] After the second pressing and shaping of the side frame 121, the reverse deformation amount of the second to-be-shaped area 121b of the side frame 121 is the second reverse deformation amount. The second reverse deformation amount refers to the reverse deformation degree of the second to-be-shaped area 121b after heating, the second pressing and shaping and rapid cooling.

[0201] In order to better combine the forming process of the side frame 121 to achieve better reshaping and repair of the side frame 121, the forming and cutting process of the side frame 121 can be divided into three times, and three reshaping and repairs are performed.

[0202] Exemplarily, after step S103c, the method may further include:

[0203] S103d: cutting the outer surface of the side frame of the base shell after the second pressing and shaping, so that the outer side surface of the side frame is cut into a curved surface.

[0204] Fig.17 A schematic diagram of the structure of a base shell during the third pressing and shaping provided in an embodiment of the present application, Fig.17a An enlarged view of the local structure of a base shell during the third pressing and shaping provided in an embodiment of the present application.

[0205] After the second pressing and shaping, the side frame 121 is further cut, such as cutting the outer surface of the side frame 121 so that the outer side surface of the side frame 121 is formed into a curved surface. Fig.17 and Fig.17a As shown, further cutting of the side frame 121 will lead to stress release again, so that the side frame 121 with a curved surface after cutting has a third area 121c to be reshaped.

[0206] It should be noted that after the second pressing and shaping and the outer surface cutting, the structure to be removed outside the gap 122 on the side frame 121 can be removed, so that the gap 122 extends from the inner surface of the side frame 121 to the outer surface of the side frame 121.

[0207] Correspondingly, the side frame 121 has undergone the first pressing and shaping and the second pressing and shaping. After two cutting and shaping, the flatness is relatively good, and the deformation caused by the stress released again will also be small. The deformation amount of the third area to be shaped 121c is the third deformation amount, which is the degree of deformation of the third area to be shaped 121c after cutting so that the outer side surface of the side frame 121 is curved. The third deformation amount can be less than or equal to the second deformation amount. For example, the third deformation amount of the third area to be shaped 121c can be about 0.2mm to 0.4mm.

[0208] S103e: placing the cut base shell in a heating device for heating, placing the heated base shell in a shaping device, performing a third pressing and shaping on at least the third area to be shaped of the side frame, and using a cooling device to cool the base shell during the third pressing and shaping process.

[0209] The base shell 120 with the third area 121c to be shaped is heated again, and the third area 121c to be shaped of the side frame 121 is pressed and shaped for the third time, and rapid cooling and shaping are ensured during the third pressing and shaping process. In other words, the side frame 121 is formed through at least three cuttings, and at least three heating, pressing and shaping, and rapid cooling and shaping, that is, in the preparation and production process of the workpiece, at least three actions of heating first, pressing and shaping, and rapid cooling are respectively deployed, and the flatness is gradually and steadily repaired, so that the side frame 121 can achieve greater plastic deformation, and a better shaping and repairing effect can be achieved for the side frame 121, and the problem of easy breakage of the plastic structure 123 during the pressing and shaping process can be better avoided, so that the workpiece has better flatness and yield.

[0210] After the third pressing and shaping of the side frame 121, the reverse deformation amount of the third to-be-shaped area 121c of the side frame 121 is the third reverse deformation amount. The third reverse deformation amount refers to the reverse deformation degree of the third to-be-shaped area 121c after heating, the third pressing and shaping and rapid cooling.

[0211] In the above three times of pressing and shaping, the third deformation amount of the third area to be shaped 121c is less than or equal to the second deformation amount of the second area to be shaped 121b, and the second deformation amount of the second area to be shaped 121b is less than the first deformation amount of the first area to be shaped 121a. In order to pursue a better repair effect, the first reverse deformation amount of the first area to be shaped 121a can be made greater than the second reverse deformation amount of the second area to be shaped 121b, and the second reverse deformation amount of the second area to be shaped 121b can be greater than the third reverse deformation amount of the third area to be shaped 121c. In this way, combined with the deformation law during the molding process of the side frame 121, the shaping and repair amount of the area to be shaped of the side frame 121 in the three shapings is reasonably allocated, and the shaping and repair of the side frame 121 is realized in a gradient manner, which avoids the problem of easy breakage of the plastic structure 123 during the shaping and pressing of the side frame 121, and significantly improves the shaping effect.

[0212] Exemplarily, the first anti-deformation amount can be 0.8mm~1.0mm, the second anti-deformation amount can be 0.3mm~0.5mm, and the third anti-deformation amount can be 0.2mm~0.4mm. Larger deformation amounts can be repaired. After the first pressing and shaping, the second pressing and shaping, and the third pressing and shaping, the deformation of the area to be shaped can be controlled to within 0.1mm.

[0213] Among them, exemplarily, a normal temperature repair and shaping solution is used, and a single shaping method is adopted to repair the side frame. For example, if the pressing of the shaping area produces a deformation of 3mm, only the deformation within 0.45mm can be repaired. If a deformation of 0.6mm needs to be repaired, the fracture rate of the plastic structure of the side frame gap is 100%.

[0214] The shaping and repair method of the present application and multiple dispersed shaping of the side frame can ensure that the plastic structure does not break. This makes the shaping and repair method more universal and solves the problem of deformation repair in more demanding workpiece design scenarios. For example, if the deformation of the shaping area produced by pressing is 6mm, at least 0.8mm of deformation can be repaired.

[0215] It is understandable that, in the preparation process of the workpiece, it is not limited to the above three times of heating, pressing, shaping and cooling the base shell. According to the specific molding production process of the workpiece and the degree of deterioration of the flatness, the implementation of heating, pressing, shaping and rapid cooling can be reasonably deployed multiple times in the production process to gradually and steadily repair the flatness. For example, in some examples, after the third pressing and shaping, the side frame can also be cut to release the stress again, so that the fourth area to be shaped is formed on the side frame, and the heating device can be used to heat the base shell again, and the shaping device can be used to press and shape the hot base shell, and it can be quickly cooled and shaped during the pressing and shaping process.

[0216] Alternatively, in some examples, when the thickness difference between the side frame and the main frame is relatively small, deformation repair can be achieved by only one pressing and shaping or two dispersed pressing and shaping methods. For example, after forming a base shell with side frames and the main frame, the side frames and the main frame are pressed and shaped once to meet the flatness requirements.

[0217] In addition, deformations occurring at other locations of the workpiece can also be repaired by only one pressing and shaping process. For example, in some examples, for deformations at the accommodating bin position on the main frame of the base shell, such as deformations at the first side wall position, since the thickness difference between the first side wall and the main frame is relatively small and there is no material deformation difference between the two, the flatness requirements here can be met by only one pressing and shaping process.

[0218] Of course, in some examples, for deformations occurring at other locations of the workpiece, such as deformations occurring at the first side wall, the above-mentioned multiple dispersed shaping (two or three dispersed shaping) method can also be used to achieve flatness restoration.

[0219] It is understandable that the method for preparing a workpiece may further include other steps, such as surface shaping and dyeing of the base shell, formation of characteristic structures, etc.

[0220] Fig.18 A process flow chart of a workpiece preparation process provided in an embodiment of the present application.

[0221] For example, see Fig.18 As shown, for example, taking the substrate as an aluminum alloy plate, the substrate can first be subjected to double disc grinding (DDG), and then CNC1, CNC2, and CNC3 to complete the side frame glue grabbing (TP glue grabbing), the main frame glue grabbing (BP glue grabbing), and the formation of gaps in the side frame. Then, nano processing, such as nano injection molding, is performed, and a plastic structure is filled in the gap, and then CNC4 and CNC5 are respectively formed to form the side frame features (TP surface features) and the main frame features (BP surface features), and then shaping 1 is performed, such as borax shaping to form the screen storage bin (LCD bin) features.

[0222] After CNC6 cutting process, a base shell with side frames and a main frame is initially formed. The base shell is subjected to shaping 2 process, where shaping 2 can be the first pressing shaping mentioned above, and the main frame (such as the position near the rotating device) and the area to be shaped of the side frames are pressed and shaped, and then CNC6.1 is used to cut the side frames after the first shaping. After shaping 3, where shaping 3 can be the second pressing shaping mentioned above, the main frame (such as the position near the rotating device) and the area to be shaped of the side frames are pressed and shaped. Then a rough polishing process is performed, such as removing knife marks on the exterior surface of the base shell, and CNC7 and CNC8 are used again to form the sound hole channel and the sound outlet hole, and then CNC9 is used to process the long sides of the side frames.

[0223] The treated base shell is subjected to medium fine polishing and anodizing to improve brightness and dyeing, and then processed by CNC10, such as cutting the side frame into an arc surface, cutting off the connecting material outside the gap (such as the structure to be removed above), making the gap pass through the side frame, and making threads (tapping), gaskets (PAD) positions, etc., and then laser engraving, such as using laser laser engraving to make the main frame have more features. Then plastic shaping 4 is performed, and plastic shaping 4 here can be the third pressing plastic shaping mentioned above, and the pressing plastic shaping is realized for the areas to be plasticized of the main frame and the side frame. In plastic shaping 4, the plastic shaping of the small A surface located on the upper and lower sides of the side frame in the main frame can also be realized. Then the docking point and the bonding surface are processed by riveting, and the PAD is formed by welding. Then the main frame, LCD compartment, side frame and small A surface are plasticized by plastic shaping 5, and then other auxiliary materials and structural parts are assembled to form a workpiece.

[0224] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, or it can be 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 embodiments of the present application can be understood according to specific circumstances.

[0225] The terms "first", "second", "third", "fourth", etc. (if any) in the description and claims of the embodiments of the present application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

Claims

1. A method for repairing the flatness of a workpiece, characterized in that: include: Providing a metal substrate; The substrate is cut to form a base shell including a main frame and a side frame, wherein the main frame and the side frame respectively have a first area to be shaped, and the deformation amount of the first area to be shaped is a first deformation amount; wherein the side frame is located at one side of the main frame, and the side frame protrudes outward from one side of the main frame; placing the base shell in a heating device for heating; Placing the heated base shell in a shaping device, performing a first pressing and shaping on the side frame and the first to-be-shaped area on the main frame, and using a cooling device to cool the base shell during the first pressing and shaping process; The side frame in the base shell after the first pressing and shaping is cut to reduce the thickness of the side frame, and the thinned side frame has a second area to be shaped, the deformation amount of the second area to be shaped is a second deformation amount, and the second deformation amount is less than the first deformation amount; The base shell after cutting is placed in the heating device for heating, the heated base shell is placed in the shaping device, at least the second to-be-shaped area of ​​the side frame is subjected to a second pressing and shaping, and the base shell is cooled by the cooling device during the second pressing and shaping process; The workpiece is formed.

2. The flatness repair method according to claim 1, characterized in that: After the substrate is cut and processed to form a base shell including a main frame and side frames, the method further includes: Forming a gap on the side frame and filling the gap with a plastic structure; A accommodating compartment is formed on the main frame.

3. The flatness repair method according to claim 2, characterized in that: Placing the base shell in a heating device for heating comprises: Providing a heating device, the heating device is formed with a plurality of heating slots, each of the heating slots having at least one heating side wall; The base shell is placed in one of the heating grooves, the groove bottom of the heating groove heats the main frame of the base shell, and the heating side wall of the heating groove heats the side surface of the side frame of the base shell.

4. The flatness repair method according to claim 3, characterized in that: After at least performing a second pressing and shaping on the side frame, the method further comprises: The outer surface of the side frame of the base shell after the second pressing and shaping is cut to form an arc surface, and the side frame has a third area to be shaped, and the deformation amount of the third area to be shaped is a third deformation amount, and the third deformation amount is less than or equal to the second deformation amount; The base shell after cutting is placed in the heating device for heating, and the heated base shell is placed in the shaping device, and at least the third area to be shaped of the side frame is pressed and shaped for the third time, and the cooling device is used to cool the base shell during the third pressing and shaping process.

5. The flatness repair method according to claim 4, characterized in that: After the side frame is pressed and shaped for the first time, the reverse deformation amount of the first area to be shaped is the first reverse deformation amount; After the side frame is pressed and shaped for the second time, the reverse deformation amount of the second area to be shaped is the second reverse deformation amount; After the side frame is pressed and shaped for the third time, the reverse deformation amount of the third area to be shaped is the third reverse deformation amount; The first anti-deformation amount is greater than the second anti-deformation amount, and the second anti-deformation amount is greater than the third anti-deformation amount.

6. The flatness repair method according to claim 5, characterized in that: The first reverse deformation amount is 0.8 mm to 1.0 mm; The second reverse deformation amount is 0.3 mm to 0.5 mm; The third reverse deformation amount is 0.2 mm to 0.4 mm.

7. The flatness repair method according to any one of claims 1 to 6, characterized in that: Placing the heated base shell in a shaping device to press and shape the area to be shaped includes: Placing the base shell in the positioning groove of the lower mold structure of the shaping device; A detachable pressurizing component is arranged on a side of the upper mold structure of the shaping device facing the lower mold structure, and the pressurizing component is adjusted to be opposite to the area to be shaped of the base shell; The upper mold structure is moved to press the pressurizing assembly onto the area to be shaped of the base shell.

8. A workpiece, used in electronic equipment, characterized in that: The workpiece is made by the flatness repair method described in any one of claims 1 to 7 above.

9. The workpiece according to claim 8, characterized in that The workpiece comprises a main frame and a side frame, wherein the side frame is located at one side of the main frame and protrudes from the main frame; The side frame is a metal piece, and a gap is formed on the side frame. The gap divides the side frame into a plurality of antenna radiators, and the gap is filled with a plastic structure.

10. The workpiece according to claim 9, characterized in that The extending direction of the slit is perpendicular to the main frame.

11. An electronic device, characterized in that: It comprises a first middle frame, and the first middle frame is made by using the flatness repair method described in any one of claims 1 to 7.

12. The electronic device according to claim 11, characterized in that: Also includes a second middle frame and a rotating device; The rotating device is located between the first middle frame and the second middle frame, and the first middle frame and the second middle frame are rotated and matched through the rotating device so that the first middle frame and the second middle frame are relatively folded or unfolded.

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