Manufacturing method of metal shell of motion camera

Abstract

The invention relates to the technical field of metal processing, and discloses a sports camera metal shell manufacturing method which comprises the following steps: S1, a first processing hole is formed in a blank along the Z direction in a penetrating manner, and three convex parts are formed on the outer wall of the blank; s2, CNC machining equipment is used for forming a first positioning hole in the protruding part, and an outer wall and an inner wall are machined on the blank; s3, a middle plate is placed in the first machining hole and welded to the inner wall of the blank, S4, a layer of plastic liquid is injected, and a plastic layer is formed; and S5, the appearance, the inner cavity and the first side hole are machined through CNC machining equipment, and the protruding part and the redundant plastic layer are removed. Blanks can be positioned, so that machining is facilitated; complex metal shell structures are machined in a CNC machining and injection molding mode, the machining difficulty is greatly reduced, and the machining precision and quality are improved. And finally, the redundant part is removed, the inner cavity part is used for positioning during final appearance machining, and normal proceeding of the machining procedure is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of metal processing, and in particular to a method for manufacturing a metal shell of a sports camera. Background Art

[0002] The metal shell of an action camera is an important part of the action camera. It not only provides tight protection for the camera, but also gives the camera a unique appearance and texture. The metal shell in an action camera can withstand greater external pressure and effectively protect the delicate parts inside the camera from damage. The metal material has good heat dissipation performance, which helps the camera maintain a stable temperature during long-term shooting and avoid performance degradation caused by overheating.

[0003] As people pursue individuality, the designs of sports cameras are diverse. As a result, the structure of metal shells has become increasingly complex, and the difficulty of appearance processing has become increasingly greater. How to reasonably and accurately process the appearance of metal shells has become a difficult problem. Summary of the invention

[0004] In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is to provide a method for manufacturing a metal shell of a sports camera to solve the problem of difficulty in processing the metal shell.

[0005] In order to solve the above technical problems, a technical solution adopted by the present invention is: providing a method for manufacturing a metal housing of a sports camera, comprising the following steps:

[0006] S1, forming a blank of an aluminum extruded profile, a first processing hole is formed through the blank along the Z direction, and three convex portions are formed on the outer wall of the blank;

[0007] S2, using CNC processing equipment to open a first positioning hole on the convex portion, and processing the outer wall and the inner wall on the blank;

[0008] S3, placing a middle plate in the first processing hole and welding it to the inner wall of the blank, wherein the middle plate divides the first processing hole into a first cavity and a second cavity distributed along the Z-axis direction, and the openings of the first cavity and the second cavity face away from each other; a gap is formed between the edge of the middle plate and the inner wall of the blank, and the first cavity and the second cavity are connected through the gap;

[0009] S4, using the gap as a channel for the flow of injection liquid, injecting a layer of plastic liquid into the inner wall of the blank, so that each inner side surface of the first cavity and the second cavity is formed with a plastic layer by the plastic liquid;

[0010] S5. Use CNC processing equipment to process the outer shape, inner cavity and the first side hole, and remove the protruding portion and excess plastic layer.

[0011] Furthermore, the step S2 includes the following sub-steps:

[0012] S21, defining two sides of the blank distributed along the Z direction as surface A and surface B, and making surface A face upward and surface B face downward along the Z direction, using a fixture to fix the blank from the inner wall of the first processing hole, using a CNC processing device to open a first positioning hole through each convex portion along the Z direction, then using a fixture to fix the blank using the first positioning hole, and then processing the outer wall of the blank to roughen;

[0013] S22, with the B surface facing upward and the A surface facing downward, the blank is fixed by using the first positioning hole, and the inner wall of the first processing hole is processed from the B surface toward the A surface on the inner wall of the first processing hole, and at least two groups of protruding parts are provided on the inner wall of the first processing hole and close to the A surface, and at least two groups of protruding parts are provided on the inner walls of the first processing hole on opposite sides, and the heights of the protruding parts of each group are consistent;

[0014] S23. Continue to make the B side face upward and the A side face downward and use the first positioning hole to fix the blank, and open second side holes inwardly connected to the first chamber on the outer side wall of the blank, and open a first notch groove in the middle of each protruding portion along the Z direction to divide the protruding portion into a first lug and a second lug along the Z-axis direction.

[0015] Furthermore, in the step S22: a plurality of grooves and a plurality of protrusions are concavely provided on the inner wall of each side of the first processing hole.

[0016] Furthermore, a connecting portion is integrally provided on the side of the middle plate at a position corresponding to each protruding portion, and two second positioning holes are opened on the middle plate;

[0017] In the S3 step: make the B side face upward and the A side face downward and use the first positioning hole to fix the blank, grab the middle plate through the two second positioning holes and insert the middle plate into the first cavity from the B side along the Z direction, each connecting part is supported on each protruding part respectively, and there is a welding gap between each connecting part and the inner wall of the first cavity, and the connecting part is welded to the protruding part by spot welding at the welding gap to separate the first processing hole into the first cavity and the second cavity.

[0018] Furthermore, in the step S3, the gap is formed between each two adjacent connecting portions and between each two adjacent protruding portions.

[0019] Furthermore, in the step S3: a second notch groove is formed on each protruding portion, and the second notch groove and the first notch groove are spaced apart from each other along the Z direction.

[0020] Furthermore, in the step S3: after the middle plate is welded, the surface of the blank is subjected to E treatment.

[0021] Furthermore, in the step S4: a plastic layer is formed by nano injection molding, the plastic layer covers the inner walls of the first cavity and the second cavity to form a product cavity, and test pieces are used on both the A surface and the B surface to test the bonding strength.

[0022] Furthermore, in the step S4: the plastic layer is filled into the second side hole.

[0023] Furthermore, the step S5 includes the following sub-steps:

[0024] S51, fix the blank with the B surface facing upwards using the first positioning hole, process the top side of the product from the B surface, determine the product height, perform fine polishing on the plastic layer to form a product cavity, and remove excess plastic layer;

[0025] S52, with the A surface facing upward and the blank fixed by the inner cavity, the CNC processing equipment is used to continue processing along the Z direction toward the B surface through the top side of the processed product to perform outer wall finishing to form the product shape, so as to remove the convex portion. After processing, the plastic layer in the second side hole separates the shape along the Z direction;

[0026] S53, opening a first side hole corresponding to the product on the blank.

[0027] The method for manufacturing a sports camera metal shell of the present invention has at least the following beneficial effects: by providing a protruding portion and a first positioning hole, the blank can be positioned for processing; the complex metal shell structure is processed separately by CNC processing and injection molding, which greatly reduces the processing difficulty and improves the processing accuracy and quality; finally, the redundant part is removed, and the inner cavity part is used for positioning during the final shape processing to ensure the normal progress of the processing process. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0029] Figure 1 is a flow chart of the method for manufacturing a metal housing of a sports camera of the present invention;

[0030] Figure 2 It is a sub-step flow chart of step S2 in the present invention;

[0031] Figure 3 It is a sub-step flow chart of step S5 in the invention;

[0032] Figure 4 It is a schematic diagram of the blank structure in step S1 of the present invention;

[0033] Figure 5It is a schematic structural diagram of the blank in step S21 of the present invention;

[0034] Figure 6 It is a schematic structural diagram of the blank in step S22 of the present invention;

[0035] Figure 7 It is a schematic structural diagram of another angle of the blank in step S22 of the present invention;

[0036] Figure 8 It is a structural schematic diagram of the middle plate of the present invention;

[0037] Fig. 9 It is a schematic structural diagram of the blank in step S3 of the present invention;

[0038] Fig.10 It is a schematic structural diagram of the blank in step S4 of the present invention;

[0039] Fig.11 It is a schematic structural diagram of another angle of the blank in step S4 of the present invention;

[0040] Fig.12 It is a schematic structural diagram of the blank in step S51 of the present invention;

[0041] Fig.13 It is a schematic structural diagram of another angle of the blank in step S51 of the present invention;

[0042] Fig.14 It is a structural schematic diagram of a case where a part of the convex portion is removed in step S52 of the present invention;

[0043] Fig.15 It is a schematic diagram of the structure after all the convex parts are removed in step S52 of the present invention;

[0044] Fig.16 It is a schematic diagram of the structure of the blank in step S53 of the present invention.

[0045] The meanings of the symbols in the accompanying drawings are:

[0046] Inner cavity a, outer shape b, circular hole 11, square hole 12, through hole 13, blank 14, first processed hole 15, protruding portion 16, first notch groove 161, second notch groove 162, first positioning hole 17, middle plate 18, connecting portion 181, second positioning hole 182, A surface 191, B surface 192, first chamber 20, protruding portion 21, protruding block 211, second chamber 22, groove body 231, protrusion 232, plastic layer 24, product top side 25, test piece 26, first lug 27, second lug 28, second side hole 29. DETAILED DESCRIPTION

[0047] The present invention will be further described below in conjunction with the accompanying drawings.

[0048] Please refer to Fig.16 The illustrated example is the structure of the metal shell finally formed after the processing is completed. The metal shell is a square cube structure as a whole and is hollow inside with an inner cavity a and an outer shape b. There is a middle plate 18 in the inner cavity a. The metal shell is formed with a first side hole. The first side hole includes a circular hole 11 and a square hole 12 respectively arranged on two opposite side walls of the metal shell. The circular hole 11 is a circular hole, and the square hole 12 is a rectangular hole. There are other rectangular square holes 12 between one of the adjacent two side walls. The other square holes 12 do not penetrate the inner cavity a. In order to install the optical structure, a number of through holes 13 of different shapes are opened on the middle plate 18, and each through hole 13 penetrates along the Z direction.

[0049] Please refer to Figures 1 to 16 The method for manufacturing a metal housing of a sports camera of the present invention comprises the following steps:

[0050] S1 . An aluminum extruded profile is formed into a blank 14 . A first processing hole 15 is formed through the blank 14 along the Z direction. Three protruding portions 16 are formed on the outer wall of the blank 14 .

[0051] Please refer to Figure 4 In step S1, the aluminum extrusion material may be AL6063 and have a square frame structure, and the size may be 53×46.00×26.00mm. The aluminum extrusion with the first processing hole 15 forms a blank 14, and the weight of the blank 14 is about 0.051kg, and the material hardness is ≥125HV. There are three convex portions 16 and they are all distributed along the Z direction. Two of the convex portions 16 are respectively arranged on two adjacent outer side walls of the blank 14, and the other convex portion 16 is located at the connection of the two adjacent outer side walls where the two convex portions 16 are located. Among the three convex portions 16, the convex portion 16 located in the middle position is used to prevent fooling, and avoid installing the blank 14 upside down during positioning, while the other two convex portions 16 are distributed diagonally. The four corners of the blank 14 are all chamfered, and the convex portion 16 is convex along the X direction or the Y direction and the outer side wall is an arc surface. For ease of understanding, the description is made using three axes, including the mutually perpendicular X and Y axes in addition to the Z axis. After the blank 14 is formed, it is fully inspected, and unqualified products need to be screened out in time to avoid further processing of unqualified products and increase costs.

[0052] S2, using CNC processing equipment to open a first positioning hole 17 on the protruding portion 16, and processing the outer wall and the inner wall on the blank 14.

[0053] Please refer to Figures 5 to 7 , step S2 includes the following sub-steps:

[0054] S21. Define the two sides of the blank 14 along the Z direction as surface A 191 and surface B 192, and make surface A 191 face upward and surface B 192 face downward along the Z direction. Use a fixture to fix the blank 14 from the inner wall of the first processing hole 15. Use CNC processing equipment to open a first positioning hole 17 through each protruding portion 16 along the Z direction. Then use a fixture to fix the blank 14 using the first positioning hole 17. Then, process the outer wall of the blank 14 to roughen it corresponding to the shape b of the metal shell.

[0055] In the step S21: a second chamber 22 is opened from the A surface 191 around the first processing hole 15 along the Z direction toward the B surface 192, and the cross section of the second chamber 22 is L-shaped, so that the second chamber 22 and the first processing hole 15 are T-shaped as a whole, and the second chamber 22 penetrates the first processing hole 15 inwardly along the X direction or the Y direction. Among them, the two side grooves 231 of the second chamber 22 along the X direction penetrate the first processing hole 15 inwardly along the X direction, and the two side grooves 231 of the second chamber 22 along the Y direction penetrate the first processing hole 15 inwardly along the Y direction, and the second chamber 22 corresponds to a part of the inner cavity of the product. The A surface 191 is also processed so that the height of the entire blank 14 is adapted to the height of the product, and the outer wall of the blank 14 except the convex portion 16 is all roughened, thereby reducing the thickness of the blank 14.

[0056] S22. Make the B surface 192 face upward and the A surface 191 face downward and use the first positioning hole 17 to fix the blank 14. The inner wall of the first processing hole 15 is processed from the B surface 192 to the A surface 191. At least two groups of protruding portions 21 are protruding inward on the inner wall of the first processing hole 15 and close to the A surface 191. At least two groups of protruding portions 21 are arranged on the inner walls on both sides of the first processing hole 15, and the heights of each group of protruding portions 21 are consistent.

[0057] In step S22, the external fixture device fixes the blank 14 through two first positioning holes 17 distributed diagonally, and makes the A surface 191 face downward and the B surface 192 face upward in the Z direction. The inner wall of the first processing hole 15 is processed from the B surface 192 along the Z direction toward the A surface 191 side, so that the volume of the first processing hole 15 is gradually expanded in the X direction and the Y direction to form a square first cavity 20. The volume size of the first cavity 20 is larger than the volume size of the inner cavity a of the final product to leave enough space for injection molding. In order to increase the connection firmness between the plastic layer 24 and the first cavity 20 during injection molding, a plurality of grooves 231 and a plurality of protrusions 232 are concavely provided on the inner walls of each side of the first cavity 20, so as to increase the contact area between the plastic layer 24 and the first cavity 20 during injection molding, and at the same time increase the connection tightness, improve firmness and stability. The groove body 231 and the protrusion 232 are both in a square block structure and have a certain angle with the inner wall of the first cavity 20, so as to further enhance the fastening force after the plastic layer 24 is formed, and limit the freedom in the Z direction to ensure the stability of the connection. The side of the first cavity 20 facing the A surface 191 does not penetrate the A surface 191 but is opened to the side of the second cavity 22 facing the B surface 192, and the length and width of the first cavity 20 are respectively greater than the length and width of the second cavity 22. After the first cavity 20 is opened to the second cavity 22, the second cavity 22 penetrates the first cavity 20 along the Z direction and the groove wall of the second cavity 22 protrudes inward relative to the first cavity 20, so that the inner wall of the side of the blank 14 facing the A surface 191 is closed relative to the first cavity 20. The protrusion 21 can be set in two groups, and the two groups of protrusions 21 are arranged on the inner walls of both sides of the first cavity 20 along the X direction or the Y direction. In another embodiment, the protruding portion 21 can be set to four groups, and the four groups of protruding portions 16 are respectively arranged on the four inner walls of the first cavity 20, and the protruding portions 21 are located on the side of the first cavity 20 close to the second cavity 22 and protrude inward relative to the second cavity 22, so as to support the middle plate 18 when welding the middle plate 18, and to be convenient for connecting with the middle plate 18 as welding points. Among them, each group of protruding portions 21 has at least two protruding blocks 211, and the protruding blocks 211 are trapezoidal and the inner side is a narrow side. The protruding blocks 211 of each group are spaced apart from each other, so that the injection plastic flows from the second cavity 22 to the first cavity 20 or from the first cavity 20 to the second cavity 22 through the gaps between the adjacent protruding blocks 211 during injection molding. The first positioning hole 17 is further processed and widened when processing the B surface 192, and the two sides where the protruding portion 16 is connected to the outer wall of the blank 14 are also processed and reduced. At this time, the overall thickness of the blank 14 is reduced again.

[0058] S23, continue to make the B surface 192 face upward and the A surface 191 face downward and use the first positioning hole 17 to fix the blank 14, and open second side holes 29 on the outer side walls of the blank 14 that are connected inward to the first cavity 20, and open a first notch groove 161 in the middle of each protruding portion 16 along the Z direction to divide the protruding portion 16 into a first lug 27 and a second lug 28 along the Z-axis direction.

[0059] In step S23, the second side holes 29 are formed on one of the side walls and are arranged in two. The length directions of the two second side holes 29 are distributed along the Z direction, and the length of the second side holes 29 is greater than the height of the final product. The first notch groove 161 is opened along the X direction or the Y direction without affecting the formation of the outer wall of the blank 14, so as to reduce the material. Finally, the processed blank 14 is cleaned and fully inspected to check and confirm whether there are unqualified products again, and unqualified products need to be removed in time.

[0060] S3. Place a middle plate 18 in the first processing hole 15 and weld it to the inner wall of the blank 14, wherein the middle plate 18 divides the first processing hole 15 into a first chamber 20 and a second chamber 22 distributed along the Z-axis direction, and the openings of the first chamber 20 and the second chamber 22 face back to back; a gap is formed between the edge of the middle plate 18 and the inner wall of the blank 14, and the first chamber 20 and the second chamber 22 are connected through the gap.

[0061] Please refer to Figure 8 and Fig. 9 In the illustrated example, the middle plate 18 is a square sheet structure, and a connecting portion 181 is integrally provided on the side of the middle plate 18 and at the position corresponding to each protruding portion 21. The connecting portion 181 can be square or trapezoidal, and the number of the connecting portions 181 is consistent with the number and position of the protruding blocks 211 to match each other. For this reason, there is a gap between adjacent connecting portions 181, so that the second chamber 22 and the first chamber 20 can be connected from the side of the middle plate 18 during welding or injection molding. Two second positioning holes 182 are provided on the middle plate 18, and the two second positioning holes 182 are diagonally distributed, and each corner of the middle plate 18 is rounded. The length and width of the middle plate 18 are respectively smaller than the length and width of the second chamber 22 and can be freely inserted therein.

[0062] In step S3: face B 192 upward and face A 191 downward, and fix the blank 14 by using the first positioning hole 17, grab the middle plate 18 through the two second positioning holes 182, and insert the middle plate 18 into the first cavity 20 from face B 192 along the Z direction, so that the middle plate 18 moves to the side of the first cavity 20 close to the second cavity 22, and each connecting part 181 is supported on each protruding part 21 respectively. In order to ensure that the middle plate 18 does not shift during welding, the middle plate 18 is fixed by the second positioning hole 182 after the middle plate 18 is installed. There is a welding gap between each connecting part 181 and the inner wall of the first cavity 20, and the connecting part 181 is welded to the protruding part 21 by spot welding at the welding gap, so as to separate the first processing hole 15 into the first cavity 20 and the second cavity 22, and complete the installation of the middle plate 18.

[0063] In the step S3, a second notch groove 162 is formed on each convex portion 16, and the second notch groove 162 and the first notch groove 161 are spaced apart in the Z direction to facilitate further material reduction and reduce the difficulty of the subsequent finishing process. In this embodiment, after the middle plate 18 is welded, it is fully inspected, and the surface of the qualified blank 14 is subjected to E treatment, and a process method of forming a special film on the surface of the blank 14 or changing its properties is used, and then the full inspection is performed again.

[0064] S4. Using the gap as a channel for the flow of injection liquid, a layer of plastic liquid is injected into the inner wall of the blank 14, so that each inner side surface of the first cavity 20 and the second cavity 22 is formed with a plastic layer 24 by the plastic liquid.

[0065] Please refer to Fig.10 and Fig.11 In step S4: a plastic layer 24 is formed by nano injection molding, and the plastic layer 24 covers the inner walls of the first cavity 20 and the second cavity 22 to form a product inner cavity a. By fixing the blank 14 and setting an inner mold in the first cavity 20 and the second cavity 22, the inner mold is adapted to the characteristics of the product inner cavity a, so that a flow channel interconnected through a gap is formed between the inner mold and the first cavity 20 and the second cavity 22, and the plastic liquid is injected and waited for solidification, and the product inner cavity a is formed after solidification. The test piece 26 is used on both the A surface 191 and the B surface 192 to test the bonding force between the plastic layer 24 and the blank 14. The flatness is controlled to be 0.01mm during injection molding, and full inspection is continued after the injection molding is completed. Among them, the plastic layer 24 is filled into the second side hole 29 during injection molding, and can be filled close to the inner wall of the first processing hole 15, or the entire second side hole 29 can be filled, but it is ensured that the thickness of the injection molded part in the second side hole 29 is greater than or equal to the thickness of the product.

[0066] S5. Use CNC processing equipment to process the outer shape b, the inner cavity a and the first side hole, and remove the protruding portion and the excess plastic layer 24.

[0067] Please refer to Figures 12 to 15 , the S5 step includes the following sub-steps:

[0068] S51, fix the blank 14 with the B surface 192 facing upwards by using the first positioning hole 17, process the top side 25 of the product from the B surface 192, determine the product height, and perform fine polishing on the plastic layer 24 to form the product inner cavity a, so as to remove the excess plastic layer 24;

[0069] S52, with the A surface 191 facing upward and the blank 14 fixed by the inner cavity a, the CNC processing equipment is used to continue to process the top side 25 of the processed product along the Z direction toward the B surface 192 to perform outer wall finishing to form the product shape b, so as to remove the convex portion 16. After processing, the plastic layer in the second side hole 29 separates the shape b along the Z direction;

[0070] S53, opening a first side hole on the blank 14 corresponding to the product.

[0071] In step S51, the flatness is controlled to be 0.05 mm, the excess injection molded part is removed from the B surface 192 and the top side edge of the product is processed to preliminarily process the top side 25 and determine the height position of the product.

[0072] In step S52, the flatness is also controlled to be 0.05 mm, and the blank 14 is fixed by the second positioning hole 182, or directly fixed by the cavity wall of the inner cavity a, and then the top side 25 of the product processed from the A surface 191 to the B surface 192 is processed along the Z phase to complete the processing of the product shape b. After the outer wall is polished, the second side hole 29 is replaced by the plastic layer 24, and the plastic layer 24 part at the second side hole 29 completely separates the metal part of the product and the blank part during processing in the Z direction, and if the plastic layer 24 at the second side hole 29 is opened on one of the two sides in the X direction, it also separates the metal part of the product along the X direction; if the second side hole 29 is located on one of the two sides in the Y direction, it also separates the metal part of the product along the Y direction to prevent the product from affecting signal reception during use, and the plastic separation can ensure signal reception. The blanks 14 are then further fully inspected, and the qualified blanks 14 are roughly polished and cleaned, and then fully inspected again after being cleaned and dried.

[0073] In step S53, the A surface 191 is facing upward and the blank 14 is fixed by the product inner cavity a or the second positioning hole 182. The first side hole, namely the circular hole 11 and the square hole 12, which penetrates the product inner cavity a, is opened on the blank 14. The circular hole 11 is located on the side where the second side hole 29 is located and between the two plastic layers 24 that separate the metal parts. One of the square holes 12 is located on the side opposite to the circular hole 11, which is convenient for the use of the probe. After cleaning and full inspection, fine grinding, cleaning and full inspection are carried out; then sandblasting and anodizing are carried out in sequence. After sandblasting and anodizing, full inspection is carried out respectively. After the sports camera is assembled and the last full inspection is carried out, it is packaged and shipped.

Claims

1. A method for manufacturing a metal housing of a sports camera, characterized in that: The following steps are involved: S1, forming a blank of an aluminum extruded profile, a first processing hole is formed through the blank along the Z direction, and three convex portions are formed on the outer wall of the blank; S2, using CNC processing equipment to open a first positioning hole on the convex portion, and processing the outer wall and the inner wall on the blank; S3, placing a middle plate in the first processing hole and welding it to the inner wall of the blank, wherein the middle plate divides the first processing hole into a first cavity and a second cavity distributed along the Z-axis direction, and the openings of the first cavity and the second cavity face away from each other; a gap is formed between the edge of the middle plate and the inner wall of the blank, and the first cavity and the second cavity are connected through the gap; S4, using the gap as a channel for the flow of injection liquid, injecting a layer of plastic liquid into the inner wall of the blank, so that each inner side surface of the first cavity and the second cavity is formed with a plastic layer by the plastic liquid; S5. Use CNC processing equipment to process the outer shape, inner cavity and the first side hole, and remove the protruding portion and excess plastic layer.

2. The method for manufacturing a sports camera metal housing according to claim 1, wherein: The S2 step includes the following sub-steps: S21, defining two sides of the blank distributed along the Z direction as surface A and surface B, and making surface A face upward and surface B face downward along the Z direction, using a fixture to fix the blank from the inner wall of the first processing hole, using a CNC processing device to open a first positioning hole through each convex portion along the Z direction, then using a fixture to fix the blank using the first positioning hole, and then processing the outer wall of the blank to roughen; S22, with the B surface facing upward and the A surface facing downward, the blank is fixed by using the first positioning hole, and the inner wall of the first processing hole is processed from the B surface toward the A surface on the inner wall of the first processing hole, and at least two groups of protruding parts are provided on the inner wall of the first processing hole and close to the A surface, and at least two groups of protruding parts are provided on the inner walls of the first processing hole on opposite sides, and the heights of the protruding parts of each group are consistent; S23. Continue to make the B side face upward and the A side face downward and use the first positioning hole to fix the blank, and open second side holes inwardly connected to the first chamber on the outer side wall of the blank, and open a first notch groove in the middle of each protruding portion along the Z direction to divide the protruding portion into a first lug and a second lug along the Z-axis direction.

3. The method for manufacturing a metal housing of a sports camera according to claim 2, wherein: In the step S22: a plurality of grooves and a plurality of protrusions are concavely provided on the inner walls of each side of the first processing hole.

4. The method for manufacturing a sports camera metal housing according to claim 3, wherein: A connecting portion is integrally provided on the side of the middle plate at positions corresponding to each protruding portion, and two second positioning holes are opened on the middle plate; In the S3 step: make the B side face upward and the A side face downward and use the first positioning hole to fix the blank, grab the middle plate through the two second positioning holes and insert the middle plate into the first cavity from the B side along the Z direction, each connecting part is supported on each protruding part respectively, and there is a welding gap between each connecting part and the inner wall of the first cavity, and the connecting part is welded to the protruding part by spot welding at the welding gap to separate the first processing hole into the first cavity and the second cavity.

5. The method for manufacturing a metal housing of a sports camera according to claim 3, wherein: In the step S3, the gap is formed between each two adjacent connecting portions and between each two adjacent protruding portions.

6. The method for manufacturing a metal housing of a sports camera according to claim 4, wherein: In the step S3: a second notch groove is formed on each protruding portion, and the second notch groove and the first notch groove are spaced apart from each other along the Z direction.

7. The method for manufacturing a sports camera metal housing according to claim 5, wherein: In the step S3: after the middle plate is welded, the surface of the blank is subjected to E treatment.

8. The method for manufacturing a sports camera metal housing according to claim 7, wherein: In the step S4: a plastic layer is formed by nano injection molding, the plastic layer covers the inner walls of the first cavity and the second cavity to form a product cavity, and test pieces are used on both the A surface and the B surface to test the bonding strength.

9. The method for manufacturing a sports camera metal housing according to claim 8, wherein: In the step S4: the plastic layer is filled into the second side hole.

10. The method for manufacturing a metal housing of a sports camera according to claim 7, wherein: The S5 step includes the following sub-steps: S51, fix the blank with the B surface facing upwards using the first positioning hole, process the top side of the product from the B surface, determine the product height, perform fine polishing on the plastic layer to form a product cavity, and remove excess plastic layer; S52, with the A surface facing upward and the blank fixed by the inner cavity, the CNC processing equipment is used to continue processing along the Z direction toward the B surface through the top side of the processed product to perform outer wall finishing to form the product shape, so as to remove the convex portion. After processing, the plastic layer in the second side hole separates the shape along the Z direction; S53, opening a first side hole corresponding to the product on the blank.

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