CN107666805A - Method for producing shell - Google Patents

Abstract

The invention provides a shell manufacturing method. The shell manufacturing method includes: providing a first shell base, the first shell base includes a bump and a shell body, the bump is protrudingly disposed on the shell body, and the bump A camera hole is provided; the center of the camera hole is determined as a first reference center; the center of the bump is determined as a second reference center; a third reference center is obtained according to the first reference center and the second reference center , the third reference center is located within a preset radiation range centered on the midpoint of the connecting line between the first reference center and the second reference center; with the third reference center as the processing reference, the shell A limit step is formed on the body body, and the limit step is located at the periphery of the camera hole. The manufacturing method of the housing prevents large deviations in the size of the two sides of the processed bump on which the camera hole is placed, and prevents the camera from being relatively eccentric on the housing.

Description

Shell making method

technical field

The invention relates to the field of electronic equipment, in particular to a method for manufacturing a casing.

Background technique

Mobile devices such as mobile phones usually include parts such as housings. When the shell is manufactured, a plate with relatively uniform thickness (for example, aluminum material) is usually provided, and then the plate is subjected to forging and pressing processes to form the shell. The casing is usually provided with a boss protruding from the casing body, and a camera hole is arranged on the boss, and the camera hole is used to expose the camera part, so that the camera can take pictures when taking pictures. The step of processing the boss on the housing body and the step of processing the camera hole are usually completed at different clamping positions, and the processing standards are unified. This will lead to a large deviation in the size of the sides of the processed boss, or a large eccentricity of the camera after assembly. Therefore, the existing shell manufacturing method will reduce the yield of the shell.

Contents of the invention

The invention provides a shell manufacturing method, the shell manufacturing method comprising:

A first housing base is provided, the first housing base includes a bump and a housing body, the bump is protrudingly disposed on the housing body, and the bump is provided with a camera hole;

Determine the center of the camera hole as the first reference center;

determining the center of the bump as a second reference center;

A third reference center is obtained according to the first reference center and the second reference center, and the third reference center is located at a predetermined center centered on the midpoint of the connecting line between the first reference center and the second reference center. within the radiation range;

Taking the third reference center as the processing reference, a limit step is formed on the housing body, and the limit step is located at the periphery of the camera hole.

Compared with the prior art, the casing manufacturing method of the present invention determines the center of the camera hole as the first reference center, determines the center of the bump as the second reference center, and according to the first reference center and the second reference center The second reference center obtains the third reference center, and the third reference center is located within the preset range centered on the midpoint of the line connecting the first reference center and the second reference center, therefore, in the third reference center When processing the edges on both sides of the bump, it is prevented that the processed edges on both sides of the bump have large deviations in size, or the eccentricity of the camera assembled on the housing through the limiting steps is relatively large.

Description of drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings that need to be used in the implementation. Obviously, the drawings in the following description are some implementations of the present invention, which are common to those skilled in the art. As far as the skilled person is concerned, other drawings can also be obtained based on these drawings on the premise of not paying creative work.

FIG. 1 is a schematic flowchart of a method for manufacturing a housing provided by a preferred embodiment of the present invention.

FIG. 2 is a side view of the first housing base 200 provided by the embodiment of the present invention.

Fig. 3 is a schematic diagram of the first reference center, the second reference center and the third reference center in the shell manufacturing method provided by the embodiment of the present invention

FIG. 4 is a schematic cross-sectional view after the limiting step is produced by the shell manufacturing method provided by the embodiment of the present invention.

FIG. 5 is a schematic flowchart of step S100 provided by a preferred embodiment of the present invention.

Fig. 6 is a schematic structural diagram of a plate in a manufacturing method of a shell provided by a preferred embodiment of the present invention.

Fig. 7 is a schematic diagram of a forging die processing plate in the shell manufacturing method provided by a preferred embodiment of the present invention.

Fig. 8 is a schematic diagram of the first forging die in the casing manufacturing method provided by Li according to a preferred implementation of the present invention.

Fig. 9 is a schematic diagram of the second forging die in the shell manufacturing method provided by a preferred embodiment of the present invention.

Fig. 10 is a schematic diagram of mold clamping of a forging die in a shell manufacturing method provided by a preferred embodiment of the present invention.

Fig. 11 is a schematic structural view of the first shell base formed by forging in the shell manufacturing method of the present invention.

FIG. 12 is a schematic flowchart of step S150 provided by a preferred embodiment of the present invention.

Fig. 13 is a schematic flowchart of step S150 provided by another preferred embodiment of the present invention.

FIG. 14 is a schematic flowchart of step S160 provided by a preferred embodiment of the present invention.

FIG. 15 is a schematic flowchart of step S200 provided by a preferred embodiment of the present invention.

FIG. 16 is a schematic flowchart of step S210 provided by a preferred embodiment of the present invention.

FIG. 17 is a schematic flowchart of step S200 provided by a preferred embodiment of the present invention.

FIG. 18 is a schematic flowchart of step S300 provided by a preferred embodiment of the present invention.

FIG. 19 is a schematic flowchart of step S310 provided by a preferred embodiment of the present invention.

Fig. 20 is a schematic structural view of the housing forming the inner cavity, the camera hole and the antenna slot.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

In the description of the embodiments of the present invention, it should be understood that the orientation or positional relationship indicated by the term "thickness" is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than implying Or an indication that the device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as limiting the invention.

Please refer to FIG. 1 . FIG. 1 is a schematic flowchart of a shell manufacturing method provided by a preferred embodiment of the present invention. The housing 500 is machined from the sheet metal part 100 . The outer surface of the casing 500 is composed of a plurality of curved surfaces, so as to make the casing look round and increase user experience. It can be understood that the housing 500 is applied to a mobile terminal, and the mobile terminal may be a mobile phone, a tablet computer, or a notebook computer. In this embodiment, the casing 500 is the back cover of the mobile phone, please refer to FIG. 20 together. The casing manufacturing method includes but not limited to steps S100, S200, S300, S400 and S500.

Step S100, providing the first housing base 200, the first housing base 200 includes a protrusion 210 and a housing body 270, the protrusion 210 protrudes from the housing body 270, and the protrusion The block 210 is provided with a camera hole 211 . Please refer to FIG. 2 . FIG. 2 is a side view of the first housing base 200 provided by the embodiment of the present invention. The first housing base 200 further includes a first curved surface 230 and a second curved surface 240 disposed opposite to the first curved surface 230 , and a flash edge between the first curved surface 230 and the second curved surface 240 250. The first housing 200 further includes a first side 210a and a second side 210b oppositely disposed, and the first side 210a is disposed opposite to the second side 210b.

Step S200, determining the center of the camera hole 211 as the first reference center O1.

Step S300, determining the center of the bump 210 as the second reference center O2.

In step S400, a third reference center O3 is obtained according to the first reference center O1 and the second reference center O2, and the third reference center O3 is located on the basis of the first reference center O1 and the second reference center O2 The midpoint of the connecting line is the center of the preset radial range. Please refer to FIG. 3 . FIG. 3 is a schematic diagram of a first reference center, a second reference center and a third reference center in the casing manufacturing method provided by an embodiment of the present invention.

Step S500 , taking the third reference center O3 as the processing reference, forming a limiting step 271 on the housing body 270 , and the limiting step 271 is located at the periphery of the camera hole 211 . Please refer to FIG. 4 . FIG. 4 is a schematic cross-sectional view of the manufacturing method of the housing provided by the embodiment of the present invention after manufacturing the limiting steps. Fig. 4 can be obtained by sectioning along line I-I in Fig. 3. The position of the limit step 271 on the periphery of the camera hole 211 means that the plane of the camera hole 211 away from the housing body 270 is used as a reference plane, and the projection of the limit step 271 on the reference plane is located at the The periphery of the camera hole 211. In order to prevent large deviations in the size of the processed sides of the bump 210 when the sides of the bump 210 are processed, or the eccentricity of the camera group assembled on the housing through the limiting step 271 is large, The radiation range is located between the first reference center O1 and the second reference center O2. Preferably, the third reference center O3 is located at the midpoint of the connection between the first reference center O1 and the second reference center O2, so as to further reduce the friction on both sides of the boss when processing the edges on both sides of the boss. The deviation of the size of the side is relatively large, or the eccentricity of the camera is relatively large when assembled on the housing through the limiting step 271 .

Compared with the prior art, the casing manufacturing method of the present invention determines the center of the camera hole 211 as the first reference center O1, determines the center of the bump 210 as the second reference center O2, and according to the first reference center O1 and the second reference center O2 obtain a third reference center O3, the third reference center O3 is located in a preset range centered on the midpoint of the line connecting the first reference center O1 and the second reference center O2 Therefore, when the sides on both sides of the bump 210 are processed with the third reference center O3, it is prevented that the size deviation of the sides of the bump 210 after processing is large, or the camera passes through the limit step The eccentricity of 271 assembled on the shell is relatively large.

In one embodiment, the step S100 includes but not limited to step S110, step S120, step S130, step S140 and step S150. Please refer to FIG. 5 , which is a schematic flowchart of step S100 provided by a preferred embodiment of the present invention.

Step S110 , providing the panel 100 . Please refer to FIG. 6 . FIG. 6 is a schematic structural diagram of a plate in a manufacturing method of a shell provided by a preferred embodiment of the present invention. The board 100 includes a first surface 100a and a second surface 100b oppositely disposed. The plate 100 is preferably a cuboid or an approximate cuboid. The plate 100 is made of metal, such as aluminum alloy. The first surface 100a and the second surface 100b are rectangular surfaces. The plate 100 can be obtained by cutting a larger metal plate. The metal plate can be cut to obtain a plurality of the plate parts 100 . Before processing the board 100 , it is also necessary to clean the first surface 100 a and the second surface 100 b of the board 100 to remove dust on the first surface 100 a and the second surface 100 b.

Between step S110 and step S120, the step S100 includes but not limited to the following steps.

Between the step S110-I and the step S120-I, the step S100 also includes but not limited to the following steps.

Step a: Deburring the periphery of the board 100 . The burrs on the periphery of the plate 100 can be removed by grinding the periphery of the plate 100, so that the plate is neat and tidy, and avoid the presence of burrs during the processing of the plate 100. As a result, the panel 100 is unbalanced in force. Removing the burrs on the peripheral edge of the board 100 can make the board 100 tidy, and then make the deformation of the board 100 in the subsequent processing even, and improve the yield of the finally formed shell.

Step b, heating the plate 100 . The board 100 is placed in a heating device, so that the temperature of the board 100 rises to a preset value. The intermolecular stress of the board 100 is reduced after heating, so that the deformation stress of the board 100 is reduced, so that the deformation of the board 100 is balanced during subsequent processing, and the yield of the final shell is improved.

Step S120, providing a forging die 30, the forging die includes a first forging die 31 and a second forging die 32, the first forging die 31 includes a boss 317, and the boss 317 is used to form the bump 210 .

Step S130 , putting the plate 100 into the first forging die 31 or the second forging die 32 .

In step S140 , the first forging die and the second forging die move relative to each other to press the plate 100 to obtain the first housing base 200 including the protrusion 210 . The bump 210 also includes

Please refer to Figure 7 to Figure 11 together, Figure 7 is a schematic diagram of the forging die processing plate in the shell manufacturing method provided by a preferred embodiment of the present invention; Figure 8 is a shell provided by Lee in a preferred embodiment of the present invention Schematic diagram of the first forging die in the manufacturing method; FIG. 9 is a schematic diagram of the second forging die in the manufacturing method of the shell provided by a preferred embodiment of the present invention; FIG. 10 is the manufacturing method of the shell provided by a preferred embodiment of the present invention Figure 11 is a schematic structural view of the first shell base formed by forging in the shell manufacturing method of the present invention. The first forging die 31 includes a first cavity 312, the first cavity 312 is used to accommodate the plate 100, the first cavity 312 is a concave structure and the first cavity 312 The perimeter is arcuate.

In this embodiment, the first forging die 31 is fixed on the machine tool, and the second forging die 32 is slidably connected to the machine tool and can slide relative to the first forging die 31 . The sliding direction of the second forging die 32 is the vertical direction. The second forging die 32 squeezes the first forging die 31 to realize the extrusion of the first forging die 31 and the second forging die 32 to the plate 100, so that the plate The member 100 is deformed, and the processing of the plate member 100 is completed.

The first forging die 31 also includes a first parting surface 311 and a first cavity 312 opened on the first parting surface 311 . The second forging die 32 includes a second parting surface 321 and a second cavity 322 opened on the second parting surface 321 . The second parting surface 321 is opposite to the first parting surface 311 . The inner wall of the first cavity 312 and the inner wall of the second cavity 322 exert pressure on two opposite surfaces of the plate 100 respectively. The first parting surface 311 is a flat surface, and the first parting surface 311 is vertically arranged so that when the first forging die 31 and the second forging die 32 are pressed together, the The first parting surface 311 and the second parting surface 321 are not easy to slide relative to each other. The second parting surface 321 is parallel to the first parting surface 311 . The first cavity 312 includes a first molding surface 313 intersecting with the first parting surface 311 . The molding surface 313 is a curved surface. The first forging die 31 exerts a pressing action on the first surface 100a of the plate 100 at the first forming surface 313 as a whole, so that the first surface 100a of the plate 100 is deformed under force, so that The plate 100 is molded into a desired shape on the first surface 100a. The second cavity 322 includes a second molding surface 323 intersecting with the second parting surface 321 , and the second molding surface 323 is a curved surface. In this embodiment, the curvature of the second molding surface 323 is smaller than the curvature of the first molding surface 313 . The second forging die 32 exerts a pressing action on the second surface 100b of the plate 100 at the second forming surface 323 as a whole, so that the second surface 100b of the plate 100 is deformed under force, so that The plate 100 is molded into a desired shape on the second surface 100b.

In this embodiment, the first cavity 312 is provided with a first overflow groove 314 at the periphery of the opening of the first parting surface 311 , and the second cavity 322 is provided at the opening of the second parting surface 321 A second overflow groove 324 is disposed on the periphery, and the second overflow groove 324 is opposite to the first overflow groove 314 . The first overflow groove 314 extends circumferentially along the opening of the first cavity 312 . The first overflow groove 314 is used to accommodate the extruded material during the pressing process of the first forging die 31 against the first surface 100 a of the plate 100 . The second overflow groove 324 is used to accommodate the extruded material during the extruding process of the second forging die 32 on the second surface 100 b of the panel 100 . The first overflow groove 314 includes an opening towards the second forging die 32, and the second overflow groove 324 includes an opening toward the first forging die 31, between the first forging die 31 and the first forging die 31. After the second forging die 32 is closed, the first overflow groove 314 and the second overflow groove 324 are closed to form an overflow cavity. The first overflow chute 314 also includes a first opening 315 that communicates with the first cavity 312 , and when the first forging die 31 squeezes the plate 100 , the material of the plate 100 passes through The first opening 315 enters the first overflow chute 314 . The second overflow groove 324 also has a second opening 325 connected with the second cavity 322 , when the second forging die 32 squeezes the plate 100 , the material of the plate 100 passes through The second opening 325 enters the second overflow tank 324 . It can be understood that, the opening of the first overflow groove 314 on the first parting surface 311 is opposite to the opening of the second overflow groove 324 on the second parting surface 321 and has the same size. The caliber of the first opening 315 of the first overflow chute 314 is equal to the caliber of the second opening 325 of the second overflow chute 324, so that the first overflow trough 314 is opposite to the first shell base The stress reduction degree of 200 is equal to the stress reduction degree of the second overflow groove 324 on the first casing base 200 , so that the stress and deformation of each part of the board 10 are balanced.

The accommodation space of the first overflow tank 314 is smaller than the overflow space of the second overflow tank 324 . The deformation effect of the first forging die 31 on the first surface 100a of the panel 100 is smaller than the deformation effect of the second forging die 32 on the second surface 100b of the panel 100, and the first overflow groove 314 The deformation material of the plate 100 is less than the deformation material of the first casing base 200 in the second overflow groove 324 . It can be understood that, a first arc chamfer 316 is provided at the first opening 315 of the first overflow trough 314 , and a second arc chamfer 316 is provided at the opening of the second cavity 322 in the second overflow chute 324 . Arc chamfer 326. The first arc chamfer 316 connects the inner side wall of the first overflow groove 314 and the inner side wall of the first cavity 312, so that the deformed material of the first shell base 200 can smoothly squeeze into the first cavity. One overflow tank 314. The second arc chamfer 326 connects the inner sidewall of the second overflow groove 324 and the inner sidewall of the second cavity 322, so that the deformed material of the first housing base 200 can smoothly squeeze into the first In the second overflow tank 324.

The first housing 200 includes a first side 210a and a second side 210b oppositely disposed, and the first side 210a is disposed opposite to the second side 210b. The boss 210 also includes an end surface 210c. The end surface 210c is the surface of the boss 210 that is away from the housing body 270 . When processing the camera hole 211, the processing may start from the end surface 210c.

Preferably, the first forging die and the second forging die move relative to each other multiple times to press the plate 100 multiple times, and the first forging die and the second forging die move relative to each other to press the plate 100 The extrusion force gradually increases when the panel 100 is described. Through the multiple impacts of the first forging die 31 against the second forging die 32, the plate 100 is gradually deformed, and finally processed and formed after multiple deformations, so that the plate 100 is finally formed. The stress distribution in the molded first housing base 200 is relatively uniform. Moreover, the impact force of the first forging die 31 relative to the second forging die 32 gradually increases, which further improves the stress distribution inside the first shell base 200 finally formed by the plate 100, so as to avoid the above-mentioned The surface of the finally formed shell of the first shell base 200 is surface indentation due to uneven stress distribution. It can be understood that the relative movement of the first forging die 31 and the second forging die 32 may be that the first forging die 31 is fixed and the second forging die 32 moves to squeeze the plate 100 , to obtain the first housing base 200; or, the second forging die 32 is fixed, and the first forging die 31 moves to extrude the plate 100 to obtain the first housing base 200; Alternatively, both the first forging die 31 and the second forging die 32 move to press the plate 100 to obtain the first casing base 200 .

Step S150 , processing the bump 210 to form a camera hole 211 .

In one embodiment, the step S150 includes but not limited to step S151-I and step S152-1. Please refer to FIG. 12 , which is a schematic flowchart of step S150 provided by a preferred embodiment of the present invention.

Step S151-I, starting from the center of the bump 210, processing the bump 210 to form a first through hole.

Step S152-I, starting from the first through hole, removing a preset part of the material around the first through hole to form the camera hole 211; and removing the material removed when removing the material around the first through hole The speed gradually decreases from adjacent to the first through hole to away from the first through hole.

In another implementation manner, the step S150 includes but not limited to step S151-II and step S152-II. Please refer to FIG. 13 , which is a schematic flowchart of step S150 provided by another preferred embodiment of the present invention.

Step S151-II, starting from the center of the bump 210, processing the bump 210 to form a first through hole.

Step S152-II, starting from the first through hole, removing a preset part of the material around the first through hole to form the camera hole 211; and the accuracy of removing the material around the first through hole gradually increases from adjacent to the first through hole to away from the first through hole.

The manufacturing method of the casing further includes: Step 160 , after the camera hole is processed, removing the overflow edge 250 .

Specifically, please refer to FIG. 14 , which is a schematic flowchart of step S160 provided by a preferred embodiment of the present invention. The step S160 includes but not limited to the following steps.

S160-I, milling the overflow edge 250 to form a joint surface connecting the first curved surface 230 and the second curved surface 240 . In this embodiment, the overflow edge 250 is milled by a CNC milling machine to remove the overflow edge. After the part of the overflow protruding from the first curved surface 230 and the second curved surface 240 is milled off, the joint surface is formed between the first curved surface 230 and the second curved surface 240 . The joint surface is a flat surface, and there is a joint line between the joint surface and the first curved surface 230 and the second curved surface 240 , so the joint surface needs to be further processed to meet the appearance requirements. Certainly, in other implementation manners, a grinding process may also be used to remove the overflow edge 250 .

S160-II, processing the junction of the joint surface and the first curved surface 230 and the second curved surface 240 . Specifically, in one embodiment, the step S150-I(b) includes: grinding the junction of the joint surface and the first curved surface 230 and the second curved surface 240; or polishing the joint surface The junction with the first curved surface 230 and the second curved surface 240 .

S160-III. Obtain a third curved surface arc-connected with the first curved surface 230 and the second curved surface 240 .

In this embodiment, the overflow edge 250 is milled by a CNC milling machine to remove the overflow edge 250 . After the part of the overflow protruding from the first curved surface 230 and the second curved surface 240 is milled off, the joint surface is formed between the first curved surface 230 and the second curved surface 240 . The joint surface is a flat surface, and there is a joint line between the joint surface and the first curved surface 230 and the second curved surface 240 , so the joint surface needs to be further processed to meet the appearance requirements. Of course, in other implementation manners, a grinding process may also be used to remove the flash edge.

In one embodiment, the step S200 includes but not limited to step S210-I, please refer to FIG. 15 , which is a schematic flowchart of the step S200 provided by a preferred embodiment of the present invention.

Step S210-I, detecting the positions of multiple points on the side of the housing body 270, determining the center of the camera hole 211 according to the positions of the multiple points on the side of the housing body 270, and The center of the camera hole 211 is marked as the first reference center O1. Preferably, when the housing body 270 is a rectangle, the number of detected points located on the long side of the rectangle is more than the number of detected points located on the short side of the rectangle.

In one embodiment, the step S210-I includes but not limited to step S211, step S212 and step S213. Please refer to FIG. 16 , which is a schematic flowchart of step S210 provided by a preferred embodiment of the present invention.

In step S211 , the center of the camera hole 211 determined by detecting the positions of multiple points on the side of the housing body 270 each time is recorded as the first center.

Step S212 , detecting the positions of multiple points on the housing body 270 multiple times to obtain multiple first centers.

Step S213, obtaining the first reference center O1 according to the average value of multiple first centers.

In another implementation manner, the step S200 includes but not limited to step S210-II. Please refer to FIG. 17 , which is a schematic flowchart of step S200 provided by a preferred embodiment of the present invention.

Step S210-II, forming a plurality of positioning parts on the side of the housing body 270, and determining the camera hole 211 based on the plurality of positioning parts formed on the side of the housing body 270 The center of the camera hole 211 is marked as the first reference center O1. Preferably, the positioning member and the bump 210 are formed in the same process. For example, a plate is provided, and the plate is forged to form the positioning member and the protrusion 210 .

In one embodiment, the step S300 includes but not limited to step S310. Please refer to FIG. 18 , which is a schematic flowchart of step S300 provided by a preferred embodiment of the present invention.

Step S310, detecting the positions of multiple points on the periphery of the bump 210, determining the center of the boss according to the positions of the multiple points on the periphery of the bump 210, and recording the center of the boss as the first Two reference center O2.

In one embodiment, the step S310 includes but not limited to step S311, step S312 and step S313. Please refer to FIG. 19 , which is a schematic flowchart of step S310 provided by a preferred embodiment of the present invention.

In step S311 , the center of the bump 210 determined by detecting the positions of multiple points on the periphery of the bump 210 each time is recorded as the second center.

Step S312 , detecting the positions of multiple points on the periphery of the bump 210 multiple times to obtain multiple second centers.

Step S313, obtaining the second reference center O2 according to the average value of multiple second centers.

The manufacturing method of the shell further includes: removing material on the side of the first shell base 200 away from the bump 210 to form the inner cavity 510 of the shell; An antenna slot 530 is formed on one side where the protrusion 210 is located, and finally a housing 5000 including a housing cavity 540 , the antenna slot 530 and a camera hole 520 is formed. Please refer to Figure 20 for details.

The above is the implementation manner of the embodiment of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the embodiment of the present invention, some improvements and modifications can also be made. These improvements and modifications are also It is regarded as the protection scope of the present invention.

Claims (12)

1. A shell manufacturing method, characterized in that, the shell manufacturing method comprises: A first housing base is provided, the first housing base includes a bump and a housing body, the bump is protrudingly disposed on the housing body, and the bump is provided with a camera hole; Determine the center of the camera hole as the first reference center; determining the center of the bump as a second reference center; A third reference center is obtained according to the first reference center and the second reference center, and the third reference center is located at a predetermined center centered on the midpoint of the connecting line between the first reference center and the second reference center. within the radiation range; Taking the third reference center as the processing reference, a limit step is formed on the housing body, and the limit step is located at the periphery of the camera hole. 2 . The manufacturing method of the casing according to claim 1 , wherein the radiation range is located between the first reference center and the second reference center. 3 . 3 . The manufacturing method of the housing according to claim 1 , wherein the third reference center is located at a midpoint of a line connecting the first reference center and the second reference center. 4 . 4. The shell manufacturing method according to claim 1, wherein the step "determining the center of the camera hole as the first reference center" comprises: Detecting the positions of multiple points on the side of the housing body, determining the center of the camera hole according to the positions of the multiple points on the side of the housing body, and recording the center of the camera hole as first reference center. 5. The shell manufacturing method according to claim 4, characterized in that the step of "detecting the positions of multiple points on the side of the shell body, according to the multiple points on the side of the shell body The position of a point determines the center of the camera hole, and the center of the camera hole is recorded as the first reference center "comprising: The center of the camera hole determined by detecting the positions of multiple points on the side of the housing body each time is recorded as the first center; detecting the positions of multiple points on the housing body multiple times to obtain multiple first centers; The first reference center is obtained according to the average value of a plurality of first centers. 6. The housing manufacturing method according to claim 1, wherein the step "determining the center of the camera hole as the first reference center" comprises: A plurality of positioning parts are formed on the side of the housing body, and the center of the camera hole is determined based on the plurality of positioning parts formed on the side of the housing body, and the center of the camera hole is The center is marked as the first reference center. 7. The manufacturing method of the casing according to claim 1, wherein the positioning member and the bump are formed in the same process. 8. The shell manufacturing method according to any one of claims 1 to 7, wherein the step of "determining the center of the boss as the second reference center" comprises: Detecting the positions of multiple points on the periphery of the protrusion, determining the center of the boss according to the positions of the plurality of points on the periphery of the protrusion, and recording the center of the protrusion as a second reference center. 9. The shell manufacturing method according to claim 1, characterized in that the step "provides a first shell base, the first shell base includes a bump and a shell body, and the bump protrudes Set on the housing body, and the bump is provided with a camera hole" includes: Provide boards; A forging die is provided, the forging die includes a first forging die and a second forging die, the first forging die includes a boss, and the boss is used to form the bump; putting the plate into the first forging die or the second forging die; The first forging die and the second forging die move relatively to press the plate, so as to obtain the first shell base including the protrusion; The bumps are machined to form camera holes. 10. The shell manufacturing method according to claim 9, wherein the step "processing the bump to form a camera hole" comprises: starting from the center of the bump, processing the bump to form a first through hole; Taking the first through hole as a starting point, remove a predetermined part of the material around the first through hole to form a camera hole; and remove the material at the periphery of the first through hole from the adjacent The first through hole gradually decreases away from the first through hole. 11. The shell manufacturing method according to claim 9, wherein the step "processing the bump to form a camera hole" comprises: starting from the center of the bump, processing the bump to form a first through hole; Taking the first through hole as a starting point, remove a predetermined part of the material around the first through hole to form a camera hole; and the accuracy of removing the material around the first through hole is from adjacent to the first The through hole gradually increases away from the first through hole. 12. The shell manufacturing method according to claim 9, characterized in that, in the step "the first forging die and the second forging die move relatively to press the plate to obtain a The first shell matrix" includes: The first forging die and the second forging die move relative to each other to squeeze the plate multiple times, and when the first forging die and the second forging die move relative to each other to squeeze the plate The extrusion force gradually increases.