Warm forming process for making mobile phone accessories from sintered diamond aluminum

Abstract

The application discloses a warm forming process method of a mobile phone accessory made of diamond aluminum. Firstly, the peripheral side edges of a diamond aluminum sheet are die pressed to form chamfers, and then the peripheral side edges of the diamond aluminum sheet are bent. Secondly, all positioning ears of the diamond aluminum sheet are die pressed and bent for multiple times to obtain a first included angle and a second included angle. Thirdly, punching is performed to obtain mounting holes of the positioning ears, and the periphery of all mounting holes of the positioning ears is die pressed to obtain multiple convex points. Fourthly, all positioning ears of the diamond aluminum sheet are die pressed and bent for multiple times to obtain a third included angle and a fourth included angle. Finally, the flatness of the die pressed diamond aluminum sheet is trimmed. The diamond aluminum sheet is formed by multiple deformations, multiple bendings and multiple stations, and heating tubes and temperature detection heads are arranged in the dies used in the steps, in addition, the surface roughness and the arc size of the bending part of the forming cavity are specified, so that the diamond aluminum sheet is bent and formed for multiple times at a specified temperature, product cracking is prevented, and the forming rate of the product is improved.

Description

Technical Field

[0001] This application relates to the field of mobile phone manufacturing technology, and in particular to a warm stamping process for mobile phone accessories made of diamond aluminum. Background Technology

[0002] Diamond aluminum is a fine powder derived from the abrasive surface of heated alumina, used to polish the surface of steel parts. Due to its high hardness, using existing technology to manufacture 0.2mm thick high-strength diamond aluminum sheets for mobile phone accessories easily leads to cracking during bending and deformation, making molding difficult. Therefore, existing molding processes cannot achieve the desired results. Summary of the Invention

[0003] To solve at least one of the above-mentioned technical problems, this application provides a warm stamping process for making mobile phone accessories from diamond aluminum, which can make the bending points of the product smoother, reduce cracking, and improve the product forming rate.

[0004] To achieve the above objectives, in a first aspect, this application discloses a warm stamping process for making mobile phone accessories from diamond aluminum, comprising the following steps:

[0005] The four sides of the molded diamond aluminum sheet are chamfered.

[0006] The sides of the diamond aluminum sheet are molded and bent to obtain a side bending structure, wherein the side bending structure is located inside the chamfer and the side bending structure is an arc; so that the sides of the diamond aluminum sheet have an angle with the middle plane.

[0007] All the positioning ears of the diamond aluminum sheet are subjected to a first molding bend, so that the cross-section of the positioning ear forms a "Z" shape. The positioning ear has a first plane, an inclined plane and a second plane. The first plane is connected to the second plane through the inclined plane to form an integral part. The second plane is connected to the side of the diamond aluminum sheet. The second plane and the inclined plane form a first angle. The forming cavity of the mold for the first molding bend has a "Z" shaped cross-section, and the surface roughness at the turning point is less than or equal to Ra0.2.

[0008] All the positioning ears of the diamond aluminum sheet are subjected to a second molding and bending, so that the second plane and the inclined plane form a second angle, and the first angle is greater than the second angle;

[0009] Punch holes in all the positioning lugs to obtain mounting holes;

[0010] Multiple protrusions are obtained by molding around the mounting hole of the positioning ear;

[0011] All the positioning ears of the diamond aluminum sheet are subjected to a third molding and bending, so that the upper surface of the first plane and the second plane form a third angle;

[0012] All the positioning ears of the diamond aluminum sheet are subjected to a fourth molding and bending, so that the upper surfaces of the first plane and the second plane form a fourth angle, wherein the fourth angle is greater than the third angle;

[0013] Each of the above steps requires the use of a corresponding mold for processing. The mold used has a heating element and a temperature detection element at a certain distance from the bending point of the forming cavity, and the distance between the temperature detection element and the heating element is equal to the distance between the heating element and the forming cavity.

[0014] Each of the above steps requires holding the pressure for a period of time during the heating and molding process.

[0015] The warm stamping process for making mobile phone accessories from diamond aluminum according to some embodiments of the present invention further includes the following steps:

[0016] Stress-relieving shaping is performed on the middle plane of the aluminum sheet;

[0017] The flatness of the middle plane of the aluminum sheet is adjusted. The mold used in this step includes a first upper mold and a first lower mold. The lower surface of the first upper mold is provided with multiple grooves, and the upper surface of the first lower mold is provided with multiple protrusions. The first upper mold and the first lower mold can be closed to flatten the middle plane of the aluminum sheet.

[0018] According to some embodiments of the present invention, a warm stamping process for making mobile phone accessories from diamond aluminum involves performing a third die bending on all the positioning ears of the diamond aluminum sheet, and then adjusting the flatness of the middle plane of the aluminum sheet.

[0019] According to some embodiments of the present invention, a warm stamping process for making mobile phone accessories from diamond aluminum involves: molding the four sides of a diamond aluminum sheet to form chamfers on all four sides; molding and bending the four sides of the diamond aluminum sheet; performing a first molding and bending on all the positioning ears of the diamond aluminum sheet; performing a second molding and bending on all the positioning ears of the diamond aluminum sheet; the molding temperature of these four steps is the same and relatively high, and the temperature of each subsequent step gradually decreases.

[0020] According to some embodiments of the present invention, a warm stamping process for making mobile phone accessories from diamond aluminum is used in which all molds are preheated to a preset temperature before use.

[0021] According to some embodiments of the present invention, a warm stamping process for making mobile phone accessories from diamond aluminum involves punching holes in all positioning ears while simultaneously punching a corner edge of the aluminum sheet.

[0022] According to some embodiments of the present invention, the positional accuracy of each punched hole in the warm stamping process for making mobile phone accessories from diamond aluminum is 0 to 0.01 mm.

[0023] According to some embodiments of the present invention, the warm stamping process for making mobile phone accessories from diamond aluminum is described in the following: the chamfer is 0.04-0.1mm, the radius of the arc at the bend is 8.5mm-9.5mm, and the distance from the highest point of the side surface of the diamond aluminum sheet to the middle plane is 0.17mm-0.23mm.

[0024] According to some embodiments of the present invention, a warm stamping process for making mobile phone accessories from diamond aluminum is described, wherein the first included angle is 136° to 137°, the second included angle is 121° to 123°, the third included angle is 9° to 11°, and the fourth included angle is 16° to 18°; furthermore, all the positioning ears of the diamond aluminum sheet are subjected to a second molding bend, such that the height of all the positioning ears is 1.17mm to 1.23mm.

[0025] According to some embodiments of the present invention, a warm stamping process for making mobile phone accessories from diamond aluminum is used in the process of molding the protrusions around the mounting holes. The mold used has a second upper mold with a plurality of punch heads and a second lower mold with a plurality of recesses corresponding to each of the punch heads.

[0026] Compared with existing technologies, the advantages of this application are as follows: Through multiple deformations, multiple stations, and multiple forming processes; particularly during the bending of all the positioning ears of the diamond aluminum sheet, four molding processes are performed, and heating elements and temperature detection elements are installed near the bending points of all mold forming cavities. Furthermore, the surface roughness of the molding cavity at the bending point during the first molding bending of all the positioning ears of the diamond aluminum sheet is Ra0.2, and the curvature of all mold turns is controlled. Therefore, cracking does not occur at the bending points during the product bending process, ensuring the product forming rate. On the other hand, adjusting the flatness of the middle plane of the aluminum sheet at a lower temperature overcomes the technical problem that the properties of diamond aluminum will deform under high-temperature conditions, leading to unqualified flatness and performance.

[0027] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the diamond aluminum sheet structure for feeding disclosed in the embodiments of this application;

[0029] Figure 2 This is a schematic diagram of the semi-finished diamond aluminum sheet structure for step two disclosed in the embodiments of this application;

[0030] Figure 3 This is a schematic diagram of the semi-finished diamond aluminum sheet structure for step three disclosed in the embodiments of this application;

[0031] Figure 4 This is a schematic diagram of the semi-finished diamond aluminum sheet structure for step a disclosed in the embodiments of this application;

[0032] Figure 5 This is a schematic diagram of the semi-finished diamond aluminum sheet structure for step four disclosed in the embodiments of this application;

[0033] Figure 6 This is a schematic diagram of the semi-finished diamond aluminum sheet structure in step five of the embodiments of this application;

[0034] Figure 7 This is a schematic diagram of the semi-finished diamond aluminum sheet structure for step six disclosed in the embodiments of this application;

[0035] Figure 8 This is a schematic diagram of the semi-finished diamond aluminum sheet structure for step seven disclosed in the embodiments of this application;

[0036] Figure 9 This is a schematic diagram of the semi-finished diamond aluminum sheet structure for step eight of the embodiments disclosed in this application;

[0037] Figure 10 This is a schematic diagram of the semi-finished diamond aluminum sheet structure in step b of the embodiments of this application;

[0038] Figure 11 This is a schematic diagram of the structure of the mold used in step three of the embodiments of this application;

[0039] Figure 12 This is a schematic diagram of the positioning ear structure disclosed in this application;

[0040] Figure label:

[0041] 1. Chamfer; 2. Side bending structure; 3. Positioning ear; 31. First included angle; 32. Second included angle; 33. Third included angle; 34. Fourth included angle; 4. First plane; 5. Bevel; 6. Second plane; 7. Mounting hole; 8. Heating element; 9. Temperature detection element; 10. Molding cavity; 11. Third upper mold; 12. Third lower mold. Detailed Implementation

[0042] This section will describe in detail the specific embodiments of this application. Preferred embodiments of this application are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of this application, but they should not be construed as limiting the scope of protection of this application.

[0043] In the description of this application, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0044] In the description of this application, "several" means one or more, "more than" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0045] In the description of this application, unless otherwise expressly defined, terms such as "setup," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this application in conjunction with the specific content of the technical solution.

[0046] In the description of this application, unless otherwise expressly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0047] In the description of this application, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0048] The technical solution of this application will be further described below with reference to the embodiments and accompanying drawings.

[0049] It should be noted that before proceeding to the first step, the diamond aluminum should first be made into a 0.2mm thick sheet (see attached document). Figure 1 As shown in the figure, the sheet-like diamond aluminum protrudes to form multiple positioning ears 3. Furthermore, the mobile phone accessories produced using this process are used for installation between the mobile phone battery and the mobile phone screen.

[0050] Please refer to the following: Figures 1 to 12In a first aspect, embodiments of this application provide a warm stamping forming process for mobile phone accessories made of diamond aluminum, comprising the following steps:

[0051] Step 1: Mold the diamond aluminum sheet around its four sides to form a chamfer 1, which is 0.04-0.1mm. This step removes burrs around the diamond aluminum sheet.

[0052] Step Two: The sides of the diamond aluminum sheet are molded and bent to obtain side bending structure 2. Side bending structure 2 is located inside the chamfer 1 and is an arc with a radius of 8.5mm to 9.5mm. This creates an angle between the sides of the diamond aluminum sheet and the central plane, and the distance from the highest point of the sides to the central plane is 0.17mm to 0.23mm. That is, with the central plane as the reference plane, the height of the sides can be 0.17mm to 0.23mm, preferably 0.2mm. The semi-finished products obtained in Steps One and Two can be referenced... Figure 2 .

[0053] Step 3: Perform a first molding bend on all the positioning ears 3 of the diamond aluminum sheet, so that the cross-section of the positioning ears 3 forms a "Z" shape. The positioning ear 3 has a first plane 4, an inclined plane 5, and a second plane 6. The first plane 4 is connected to the second plane 6 via the inclined plane 5 to form a single unit. The second plane 6 is connected to the side of the diamond aluminum sheet, and the second plane 6 and the inclined plane 5 form a first included angle 31. The forming cavity 10 of the mold for the first molding bend has a "Z" shaped cross-section, and the surface roughness at the bend is less than or equal to Ra0.2. During production, there are requirements for the arc bending points and the surface roughness of the mold. In some areas at the bending points, the surface roughness of the mold is slightly higher to ensure the mold holds the product in place and prevents product deformation from affecting other areas. The semi-finished product obtained in this step can be referenced. Figure 3 .

[0054] Step 4: Perform a second molding bend on all the positioning ears 3 of the diamond aluminum sheet, so that the second plane 6 and the inclined plane 5 form a second included angle 32, and the first included angle 31 is greater than the second included angle 32. As a preferred embodiment, the first included angle 31 can be 136° to 138°, preferably 137°, and the second included angle 32 can be 121° to 123°, preferably 122°. Furthermore, during the second molding bend of all the positioning ears 3 of the diamond aluminum sheet, the height of all the positioning ears 3 is 1.17mm to 1.23mm, preferably 1.2mm, and the height reference plane is the middle plane of the diamond aluminum sheet. The semi-finished product obtained in this step can be referenced... Figure 4 .

[0055] Step 5: Punch holes in all positioning ears 3 to obtain mounting holes 7; the specific semi-finished product is as follows: Figure 6As shown, this step involves punching holes in the positioning ears 3 on the left and lower sides of the aluminum sheet. The positional accuracy of each punch is 0–0.01 mm, preferably 0.01 mm. To ensure production accuracy, the fitting accuracy of the upper and lower dies in this step is 0.03 mm. The cutting edge of the lower die is trimmed every 6000 pieces produced to ensure that the products are burr-free. In addition, the upper die punch is replaced every 6000 pieces.

[0056] This step involves punching holes in all the positioning ears 3, and simultaneously punching a corner of the aluminum sheet. (See attached document.) Figure 6 Two holes are punched in the upper left corner of the diamond aluminum sheet. The positional accuracy of all punched holes is 0 to 0.01 mm, preferably 0.01 mm.

[0057] Step Six: Mold the area around the mounting hole 7 of the positioning ear 3 to create multiple raised dots. The specific shape of the resulting product can be found in the reference [reference needed]. Figure 7 Four small protrusions are formed around the mounting hole 7 to ensure more stable contact during product installation. In the mold used in this step, the second upper mold is equipped with four punch heads, and the second lower mold is equipped with four concave points corresponding to each punch head, wherein the depth of the concave points is a small hole of 0.18mm; the head of the punch should have a ball head with R0.09.

[0058] Step 7: Perform a third molding bend on all the positioning ears 3 of the diamond aluminum sheet, so that the upper surfaces of the first plane 4 and the second plane 6 form a third angle 33; the semi-finished product obtained in this step is as follows: Figure 8 As shown.

[0059] Step 8: Perform a fourth molding bend on all the positioning ears 3 of the diamond aluminum sheet, so that the upper surfaces of the first plane 4 and the second plane 6 form a fourth included angle 34, where the fourth included angle 34 is greater than the third included angle 33; the semi-finished product obtained in this step is as follows: Figure 9 As shown. In a preferred embodiment, the third included angle 33 can be 9° to 11°, preferably 10°, and the fourth included angle 32 can be 16° to 18°, preferably 17°.

[0060] Each of the above steps requires processing using a corresponding mold. The mold used has a heating element 8 and a temperature sensing element 9 positioned at a certain distance from the bending point of the forming cavity 10. The distance between the temperature sensing element 9 and the heating element 8 is equal to the distance between the heating element 8 and the forming cavity 10 (see reference here). Figure 11In a preferred embodiment, the temperature sensing element 9 is a temperature probe, and the heating element 8 is a heating tube. The heating element 8 is located 8mm from the bend in the forming cavity 10 of the mold used, and the distance between the temperature sensing element 9 and the heating element 8 is also 8mm. It should be noted that the phrase "each step requires processing using a corresponding mold" can be understood as meaning that the forming cavity of the mold used in each step is different, ensuring that each step can shape the product.

[0061] During the heating and molding process in each of the above steps, it is necessary to hold the pressure for a period of time, specifically 5 seconds, to allow the product to solidify in the mold.

[0062] It should be noted that the most vulnerable points for breakage of the diamond aluminum plate positioning ear 3 are: the junction of the first plane 4 and the inclined plane 5, and the junction of the second plane 6 and the inclined plane 5 (see reference). Figure 12 ).

[0063] Therefore, in this embodiment, the positioning ear 3 is prevented from breaking by repeatedly heating and molding at the easily broken position and repeatedly bending it, and the angle of the bending is finely adjusted.

[0064] The first molding bend, the second molding bend, the third molding bend, and the fourth molding bend in this embodiment should not be interpreted as obtaining the first included angle, the second included angle, the third included angle, and the fourth included angle through only one molding bend. In other embodiments, the preset angle can also be obtained through multiple molding bends.

[0065] In a preferred embodiment, the warm stamping process for making mobile phone accessories from diamond aluminum further includes the following steps:

[0066] Step a: Stress-relieving shaping of the middle plane of the aluminum sheet; this step can eliminate internal stress. To facilitate automated production, in this embodiment, pitting can be pressed into the middle plane of the aluminum sheet. For the specific formed semi-finished product, please refer to... Figure 5 Furthermore, stress can be relieved through heat treatment annealing, heat treatment quenching and tempering, and other methods.

[0067] Step b: Trim the flatness of the middle plane of the aluminum sheet. The mold used in this step has a first upper mold and a first lower mold. The lower surface of the first upper mold has multiple grooves, and the upper surface of the first lower mold has protrusions. The closing of the first upper mold and the first lower mold can flatten the middle plane of the aluminum sheet. The product obtained in this step can be referenced... Figure 10 The flatness obtained by this step is 0.2 mm. The depth of the groove can be 0.06-0.07 mm or 0.05 mm; the height of the protrusion can be 0.04-0.06 mm, preferably 0.05 mm.

[0068] In one embodiment, after the third molding and bending of all the positioning ears 3 of the aluminum sheet, the flatness of the middle plane of the aluminum sheet is adjusted. That is, step b is placed as the last step; alternatively, step a can be placed after step four and before step five.

[0069] In one embodiment, the process sequence is: Step 1, Step 2, Step 3, Step 4, Step a, Step 5, Step 6, Step 7, Step 8, Step b. The molding temperatures in Steps 1 to 4 are the same and relatively high, specifically 245°C to 255°C, preferably 250°C. From Step a to Step b, the temperature gradually decreases, with Step b's temperature being 50°C to 60°C. In this embodiment, all molds must be preheated to the planned temperature before production; production can only begin when the temperature is reached.

[0070] In this embodiment, each step corresponds to a processing station. Step one involves deburring, and step two involves obtaining a groove-shaped diamond aluminum. The temperature of the mold during the bending process is controlled to prevent cracking at the bending point. Steps three and four involve bending the positioning ear 3. Through two bending operations, and with the surface roughness and arc circumference of the mold used for molding at the bending point set to preset values, combined with temperature control at the bending point, cracking at the bending point of the positioning ear 3 can be prevented.

[0071] Furthermore, to save on the process steps that would result in burrs from punching, steps five and six are placed before step seven.

[0072] In this embodiment, as Figure 11 As shown, the temperature probe of the third upper mold 11 is positioned above the heating element, which is located between the temperature probe and the forming cavity 10. The distance from the temperature probe to the heating element is equal to the distance from the heating element to the forming cavity 10. This distance can be 8mm, ensuring that the actual temperature of the product matches the controlled temperature. Both the third upper mold 11 and the third lower mold 12 have two bends, and the surface roughness of these bends must reach Ra0.2. This ensures that when the third upper mold 11 is pressed down, the aluminum alloy forming process is not too smooth due to insufficient surface roughness (because the radius R at the bend of the third lower mold 12 is 0.3), preventing tearing.

[0073] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention. Furthermore, unless otherwise specified, the embodiments of the present invention and the features thereof can be combined with each other.

Claims

1. A warm stamping forming process for mobile phone accessories made of diamond aluminum, characterized in that, Includes the following steps: The four sides of the molded diamond aluminum sheet are chamfered (1); The sides of the diamond aluminum sheet are bent by molding to obtain a side bending structure (2), wherein the side bending structure (2) is located inside the chamfer (1) and the side bending structure (2) is an arc; so that the sides of the diamond aluminum sheet have an angle with the middle plane. All the positioning ears (3) of the diamond aluminum sheet are subjected to a first molding bend, so that the cross-section of the positioning ear (3) forms a "Z" shape. The positioning ear (3) has a first plane (4), a slope (5) and a second plane (6). The first plane (4) is connected to the second plane (6) through the slope (5) to form an integral whole. The second plane (6) is connected to the side of the diamond aluminum sheet. The second plane (6) and the slope (5) form a first included angle (31). The mold forming cavity (10) of the first molding bend has a "Z" shaped cross-section, and the surface roughness at the turning point is less than or equal to Ra0.

2. All the positioning ears (3) of the diamond aluminum sheet are subjected to a second molding and bending, so that the second plane (6) and the inclined plane (5) form a second included angle (32), and the first included angle (31) is greater than the second included angle (32); Punch holes in all the positioning ears (3) to obtain mounting holes (7); Multiple protrusions are obtained by molding around the mounting hole (7) of the positioning ear (3); All the positioning ears (3) of the diamond aluminum sheet are subjected to a third molding and bending, so that the upper surface of the first plane (4) and the second plane (6) form a third included angle (33); All the positioning ears (3) of the diamond aluminum sheet are subjected to a fourth molding and bending, so that the upper surface of the first plane (4) and the second plane (6) forms a fourth included angle (34), wherein the fourth included angle (34) is greater than the third included angle (33); In each of the above steps, the corresponding mold is used for processing. The mold used is provided with a heating element (8) and a temperature detection element (9) at a certain distance from the bending point of the forming cavity (10). The distance between the temperature detection element (9) and the heating element (8) is equal to the distance between the heating element (8) and the forming cavity (10). Each of the above steps requires holding the pressure for a period of time during the heating and molding process.

2. The warm stamping forming process for mobile phone accessories made of diamond aluminum according to claim 1, characterized in that, It also includes the following steps: Stress-relieving shaping is performed on the middle plane of the aluminum sheet; The flatness of the middle plane of the aluminum sheet is adjusted. The mold used in this step includes a first upper mold and a first lower mold. The lower surface of the first upper mold is provided with multiple grooves, and the upper surface of the first lower mold is provided with multiple protrusions. The first upper mold and the first lower mold can be closed to flatten the middle plane of the aluminum sheet.

3. The warm stamping forming process for mobile phone accessories made of diamond aluminum according to claim 2, characterized in that, After the third molding and bending of all the positioning ears (3) of the diamond aluminum sheet, the flatness of the middle plane of the metal aluminum sheet is adjusted.

4. The warm stamping forming process for mobile phone accessories made of diamond aluminum according to claim 3, characterized in that, The four sides of the diamond aluminum sheet are molded to form chamfers (1); the four sides of the diamond aluminum sheet are molded and bent; all the positioning ears (3) of the diamond aluminum sheet are first molded and bent; all the positioning ears (3) of the diamond aluminum sheet are second molded and bent; the molding temperature of these four steps is the same and the temperature is high, and the temperature of each subsequent step gradually decreases.

5. The warm stamping forming process for mobile phone accessories made of diamond aluminum according to claim 4, characterized in that, All molds are heated to a preset temperature before use.

6. The warm stamping forming process for mobile phone accessories made of diamond aluminum according to claim 5, characterized in that, While punching all the positioning ears (3), punch one corner of the aluminum sheet.

7. The warm stamping forming process for mobile phone accessories made of diamond aluminum according to claim 6, characterized in that, The positioning accuracy of each of the punches is 0 to 0.01 mm.

8. The warm stamping forming process for mobile phone accessories made of diamond aluminum according to any one of claims 1 to 7, characterized in that, The chamfer (1) is 0.04 to 0.1 mm, the radius of the arc at the bend is 8.5 mm to 9.5 mm, and the height between the side surface and the middle plane of the diamond aluminum sheet is 0.17 mm to 0.23 mm.

9. The warm stamping forming process for mobile phone accessories made of diamond aluminum according to any one of claims 1 to 7, characterized in that, The first included angle (31) is 136° to 138°, the second included angle (32) is 121° to 123°, the third included angle (33) is 9° to 11°, and the fourth included angle (34) is 16° to 18°. In addition, all the positioning ears (3) of the diamond aluminum sheet are subjected to a second molding bend so that the height of all the positioning ears (3) is 1.17mm to 1.23mm.

10. The warm stamping forming process for mobile phone accessories made of diamond aluminum according to any one of claims 1 to 7, characterized in that, The mold used in the process of molding around the mounting hole (7) to obtain the protrusion has a second upper mold with a plurality of punch heads and a second lower mold with a plurality of recesses corresponding to each of the punch heads.

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