CN110369951B - Machining method of metal middle frame and metal middle frame - Google Patents
Machining method of metal middle frame and metal middle frame Download PDFInfo
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- CN110369951B CN110369951B CN201910597504.9A CN201910597504A CN110369951B CN 110369951 B CN110369951 B CN 110369951B CN 201910597504 A CN201910597504 A CN 201910597504A CN 110369951 B CN110369951 B CN 110369951B
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Abstract
A processing method of a metal middle frame comprises the following steps: providing a metal section; respectively carrying out primary processing on the front surface and the back surface of the metal section, processing a front side initial groove in the middle of the front surface of the metal section, and processing a back side initial groove in the middle of the back surface of the metal section to obtain a middle frame initial shape; carrying out double-sided grinding on the primary shape of the middle frame; processing an injection molding slot position and an antenna slot position on the middle frame prototype; performing injection molding treatment on the initial shape of the middle frame to obtain a composite frame body; and performing finish machining on the composite frame body to obtain the metal middle frame. Through carrying out primary processing respectively at the front and the reverse side of metal section bar before the former type of center grinds and trench processing, the initial recess of positive side and the initial recess of contra-lateral have produced the release to the stress of the former type of center to can avoid compound framework follow-up processing to produce local deformation and influence the plane degree effect because of the effect of internal stress. The invention also comprises a metal middle frame which is manufactured by the processing method of the metal middle frame.
Description
Technical Field
The invention relates to the technical field of electronic equipment, in particular to a metal middle frame and a processing method thereof.
Background
With the continuous development of mobile terminal technology, the application of electronic equipment such as smart phones and palm computers is very common and becomes an important component in work and life of people.
In the production and assembly of the electronic equipment, a metal middle frame is obtained by machining through a CNC (computer numerical control) machine tool, then the metal middle frames for mounting the circuit board, the battery and the like are collected, and the capacitive touch screen and the battery cover are mounted in front of and behind the metal middle frame, so that the electronic equipment such as a mobile phone or a flat panel is formed.
However, as the intelligent electronic device continuously pursues smaller thickness, the overall structure of the metal middle frame tends to be weak, which causes easy deformation of the metal middle frame and affects the assembly effect of the intelligent electronic device.
Disclosure of Invention
Therefore, a need exists for a method of processing a metal middle frame that can prevent the metal middle frame from deforming, and a metal middle frame manufactured by the method.
A processing method of a metal middle frame comprises the following steps:
providing a metal section;
respectively carrying out primary processing on the front surface and the back surface of the metal section, processing a front side initial groove in the middle of the front surface of the metal section, and processing a back side initial groove in the middle of the back surface of the metal section to obtain a middle frame initial shape;
carrying out double-sided grinding on the primary shape of the middle frame;
processing an injection molding slot position and an antenna slot position on the middle frame prototype;
performing injection molding treatment on the initial shape of the middle frame to obtain a composite frame body;
and performing finish machining on the composite frame body to obtain the metal middle frame.
According to the processing method of the metal middle frame, the front side and the back side of the metal section are respectively subjected to primary processing before the middle frame initial form is ground and the groove position is processed, the stress of the front side initial groove and the reverse side initial groove on the middle frame initial form is released, so that the phenomenon that the subsequent processing of the composite frame body generates local deformation and influences the flatness effect due to the action of internal stress can be avoided, and the metal middle frame is ensured to meet the assembly requirement.
In one embodiment, when the front surface of the metal section is subjected to primary processing, an upper boss is reserved on the front surface of the metal section; when the back surface of the metal section is subjected to primary processing, the back surface of the metal section is reserved with a lower boss, so that in the double-sided grinding process, supports are respectively provided for the primary shapes of the middle frames from the middle parts of the two sides, and the flatness of the primary shapes of the middle frames after grinding is ensured.
In one embodiment, in the step of processing the injection molding slot position and the antenna slot position on the front surface of the primary middle frame, a first clamp platform for supporting the metal middle frame adsorbs the back surface of the metal middle frame through a first vacuum suction hole, so that the attaching degree between the back surface of the primary middle frame and the supporting surface of the first clamp platform is improved, and the processed flatness is improved; and the step of performing finish machining on the composite frame body comprises the step of performing finish machining on the front surface of the composite frame body, wherein when the front surface of the composite frame body is precisely machined, a second clamp platform for supporting the composite frame body adsorbs the back surface of the composite frame body through a second vacuum suction hole, so that the attaching degree between the supporting surface of the second clamp platform and the back surface of the composite frame body is improved, and the machined flatness is improved.
In one embodiment, the method for manufacturing the antenna slot in the middle frame prototype comprises the following steps of: and carrying out surface nano corrosion on the metal middle frame so as to improve the bonding rate between the metal of the initial shape of the middle frame and the injection molding material.
In one embodiment, the step of finishing the composite frame body comprises finishing the front surface of the composite frame body and finishing the back surface of the composite frame body; when the front surface of the composite frame body is precisely machined, a primary outer edge stress groove is formed in the skirt edge of the composite frame body; and when the reverse side of the composite frame body is precisely machined, secondary outer edge stress grooves are formed in the skirt edge of the composite frame body so as to further release stress and improve the flatness effect.
In one embodiment, the step of performing finish machining on the composite frame body includes performing finish machining on the back surface of the composite frame body, and when performing finish machining on the back surface of the composite frame body, the third clamp platform fixes the composite frame body through a fixing part reserved on the edge of the composite frame body, and the third clamp platform adsorbs the front surface of the composite frame body through a vacuum chuck, so that the adhesion degree between the front surface of the composite frame body and the supporting surface of the third clamp platform is improved, and the flatness after machining is improved.
In one embodiment, the step of finishing the composite frame comprises finishing the edges of the composite frame; when the edge of the composite frame body is subjected to finish machining, the fourth clamp platform provides point support for the edge part of the composite frame body, so that the composite frame body is prevented from being deformed due to accumulation of metal chips on the fourth clamp platform.
In one embodiment, the step of finishing the composite frame body comprises finishing the edge of the composite frame body, and finishing the edge of the metal middle frame; the composite frame body is placed on the fourth fixture platform, the metal cover plate is placed above the composite frame body, and the electromagnet in the fourth fixture platform generates magnetic force on the metal cover plate, so that influence on machining of the edge of the composite frame body is avoided.
In one embodiment, finishing the composite frame includes finishing edges of the composite frame; when the edge of the composite frame body is subjected to finish machining, cutting compensation is provided for a position where upwarp or sinking is easy to generate on the edge of the composite frame body, so that the flatness of the reverse side of the composite frame body is guaranteed.
A metal middle frame is manufactured by the processing method of the metal middle frame, so that the edge attaching effect of the metal middle frame and a screen or a battery cover plate is guaranteed.
Drawings
FIG. 1 is a flow chart illustrating the main steps of a method for manufacturing a metal bezel according to a preferred embodiment of the present invention;
FIG. 2 is a flow chart illustrating a subsequent step of the method of manufacturing the metal bezel shown in FIG. 1;
FIG. 3A is a schematic front perspective view of the middle frame prototype after the front primary processing is completed;
FIG. 3B is a schematic perspective view of the back side of the middle frame after the preliminary processing of the back side is completed;
FIG. 4 is a solid perspective view of the middle frame prototype and the first fixture platform for completing the injection molding slot and the antenna slot;
FIG. 5 is a perspective view of the composite frame and second fixture platform with the finished front side finish machined;
FIG. 6 is a perspective view of the composite frame and the third fixture platform with the reverse side finished for finish machining;
fig. 7 is a perspective view of the metal middle frame and the fourth jig stage after the finish machining of the edge.
The corresponding relation between each reference number and each meaning in the drawings is as follows:
the structure comprises a metal middle frame 300, a middle frame prototype 300a, a composite frame body 300b, an injection molding slot position 301, an antenna slot position 302, a primary outer edge stress slot 303 and a secondary outer edge stress slot 304;
a front surface 31 (of the metal middle frame), a front side initial groove 311, an upper boss 312, a rough positioning hole 313, a mounting hole 314 and a receiving groove 315;
the back surface 32 (of the metal middle frame), the initial groove 321 on the back surface, the lower boss 322 and the surface stress groove 323;
a first clamp platform 40, a first vacuum suction hole 401, a second clamp platform 500, a second vacuum suction hole 501;
a third clamp platform 600, a vacuum chuck 601;
a fourth fixture platform 700, a support point 701, a metal cover plate 702, and an electromagnet 703.
Detailed Description
In order that the invention may be more fully understood, reference will now be made to the following description. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
Referring to fig. 1 to 7, a method for processing a metal middle frame according to a preferred embodiment of the present invention is shown for processing and producing the metal middle frame. Referring to fig. 1, the method for processing the metal middle frame includes the following steps:
s10: providing a metal section;
s11: respectively carrying out primary processing on the front surface 31 and the back surface 32 of the metal section, processing a front initial groove 311 in the middle of the front surface 31 of the metal section, and processing a back initial groove 321 in the middle of the back surface 32 of the metal section to obtain a middle frame prototype 300 a;
s12: carrying out double-sided grinding on the middle frame prototype 300 a;
s13: processing an injection molding slot 301 and an antenna slot 302 on the middle frame prototype 300 a;
s14: performing injection molding treatment on the middle frame prototype 300a to obtain a composite frame body 300 b;
s15: the composite frame body 300b is subjected to finish machining to obtain a metal middle frame.
The front surface 31 and the back surface 32 of the metal section are respectively subjected to primary processing before the middle frame prototype 300a is ground and slot position processing, and the front side initial groove 311 and the back side initial groove 321 release stress of the middle frame prototype 300a, so that the phenomenon that the subsequent processing of the composite frame body 300b generates local deformation and influences the flatness effect due to the action of internal stress can be avoided, and the metal middle frame 300 is ensured to meet the assembly requirement.
For step S10, in this embodiment, the metal profile may be manufactured by an aluminum extrusion process, where the aluminum extrusion process is to flow the aluminum material softened at high temperature through an aluminum extrusion die under the strong extrusion of an aluminum extruder to form an aluminum profile product meeting the requirement, and the embodiment is to extrude the metal plate into the metal profile through the aluminum extrusion die. In other embodiments, the metal profile can be manufactured by mechanical processing, that is, the metal profile can be formed by processing a metal plate by mechanical equipment to enable the external dimension to meet the requirement.
In step S11, the metal profile is machined to form the middle frame blank 300a of the preliminary structure.
Referring to fig. 3A and 3B, in order to avoid uneven polishing and influence on the flatness caused by the suspension of the middle portion of the front surface 31 or the middle portion of the back surface 32 in the double-sided polishing process of the primary shape 300a of the middle frame, an upper boss 312 is reserved on the front surface 31 of the metal profile during the primary processing of the front surface 31 of the metal profile; when the back surface 32 of the metal section is subjected to primary processing, a lower boss 322 is reserved on the back surface 32 of the metal section; specifically, the surface of the upper boss 312 is level with the edge height of the front face 31 side of the metal profile, and the surface of the lower boss 322 is level with the edge height of the back face 32 side of the metal profile; therefore, in the double-sided grinding process, supports are respectively provided for the middle frame prototype 300a from the middle parts of two sides, and the flatness of the ground middle frame prototype 300a is guaranteed.
Specifically, when the electronic device is assembled, the front surface 31 of the metal middle frame 300 corresponds to a screen, and the back surface 32 of the metal middle frame 300 corresponds to a battery cover.
Further, in order to chip the front surface 31 of the metal profile by a large-diameter chip cutter to improve efficiency, the gap between the upper bosses 312 is larger than 16 mm; the direction perpendicular to the front surface 31 or the back surface 32 of the metal section is the Z-axis direction, the direction parallel to the long side of the metal section is the Y-axis direction, the direction parallel to the short side of the metal section is the X-axis direction, and in order to facilitate stress release and reduce deformation, a margin of 0.28-0.42 mm is reserved in the Z-axis direction in the primary processing of the front surface 31 of the metal section; in the primary processing of the front surface 31 of the metal section, a margin of 2.64-3.96 mm is reserved in the X-axis or Y-axis direction. In the primary processing of the front surface 31 of the metal section, the back surface 32 of the metal section is used as a reference surface, and a rough positioning hole 313 is processed on the metal section; the front surface 31 of the metal section is positioned by lateral pushing of the cylinder in the primary processing, and the metal section is fixed by compressing the cylinder.
In order to facilitate the stress release in the finish machining process and reduce the deformation of the rear clamping position, in the primary machining of the back surface 32 of the metal section, a surface stress groove 323 is formed in the skirt edge of the metal section, and the whole rough allowance of 0.4-0.6 mm, preferably 0.5mm, is reserved on the back surface 32 of the middle frame prototype 300 a. Specifically, the skirts are distributed along the edges of the middle frame blank 300a and are convex with respect to the final edges of the metal middle frame 300.
For step S12, the single-sided grinding depth of the middle frame blank 300a is preferably 0.2 mm.
Referring to fig. 4, in step S13, when cutting is performed on the back side 32 of the middle frame blank 300a, the thick positioning holes 313 on the middle frame blank 300a are used to position the middle frame blank 300a, and the front side 31 of the middle frame blank 300a is used as a reference surface, and the cylinder fixing mechanism is used to fix the edge of the middle frame blank 300 a; specifically, the lower boss 322 is cut away at the same time when the reverse side 32 of the middle frame blank 300a is cut.
When cutting is carried out on the front surface 31 of the middle frame prototype 300a, the middle frame prototype 300a is positioned by the rough positioning hole 313 on the middle frame prototype 300a, the back surface 32 of the middle frame prototype 300a is taken as a reference surface, and the cylinder fixing mechanism is fixed by the corner of the middle frame prototype 300 a; specifically, the upper boss 312 is cut out simultaneously when the front face 31 of the center frame blank 300a is cut.
In the process of processing the injection slot 301 and the antenna slot 302 on the middle frame prototype 300a, the processing tool processes the front surface 31 or the back surface 32 of the middle frame prototype 300a from inside to outside along the square-shaped path. Specifically, the injection slot 301 and the antenna slot 302 are distributed along the edge of the middle frame prototype 300 a.
Further, in the step of processing the injection molding slot 301 and the antenna slot 302 on the front surface 31 of the middle frame prototype 300a, the first fixture platform 400 for supporting the middle frame prototype 300a adsorbs the back surface 32 of the middle frame prototype 300a through the first vacuum suction hole 401, so that the adhesion degree between the back surface 32 of the middle frame prototype 300a and the supporting surface of the first fixture platform 400 is improved, and the processed flatness is improved. Preferably, the first vacuum suction holes 401 are disposed near the short side of the middle frame blank 300 a.
Further, in order to improve the bonding rate between the metal and the injection molding material of the middle frame blank 300a, the method for processing the metal middle frame includes the steps of processing the injection molding slot 301 on the middle frame blank 300a in step S13 and processing the antenna slot 302 between the step S14 and the injection molding treatment of the middle frame blank 300a, and further includes the step S131 of performing surface nano-corrosion on the middle frame blank 300a, wherein the corrosion amount is optionally within 0.03 mm.
In step S14, an injection molding process is performed on the injection molding slot 301 and the antenna slot 302 of the middle frame blank 300a, so as to provide a supporting function for the antenna portion on the middle frame blank 300 a.
In step S15, the finishing process for composite frame 300b includes
Step S151: performing finish machining on the front surface 31 of the composite frame body 300 b;
step S152: performing finish machining on the reverse surface 32 of the composite frame body 300 b;
step S153: the edges of the composite frame 300b are finished.
Referring to fig. 5, in step S151, corresponding mounting holes 314 and receiving grooves 315 are precisely formed on the screen mounting surface of the front surface 31 of the composite frame 300b to fix the screen or receive related electronic components during the assembly of the intelligent electronic device; further, when the front surface 31 of the composite frame 300b is precisely machined, the second jig stage 500 for supporting the composite frame 300b sucks the back surface 32 of the composite frame 300b through the second vacuum suction holes 501, so that the degree of adhesion between the supporting surface of the second jig stage 500 and the back surface 32 of the composite frame 300b is improved, and the machined flatness is improved. Preferably, the second vacuum suction hole 501 is disposed opposite to the battery compartment of the reverse side 32 of the composite frame 300 b.
Further, when the front surface 31 of the composite frame 300b is precisely machined, a primary outer edge stress groove 303 is formed in the skirt of the composite frame 300b to further release stress and improve the flatness effect. Preferably, each long side of the composite frame 300b is correspondingly provided with four primary outer edge stress grooves 303, and the remaining thickness of the inner wall of the primary outer edge stress groove 303 corresponding to the long side relative to the final long side edge of the composite frame 300b is 1.32-1.98 mm; the thickness of the margin of the inner wall of the primary outer edge stress groove 303 corresponding to the short edge relative to the final short edge of the composite frame 300b is 2.8-4.2 mm.
Further, in order to reduce the cutting amount of the finish machining process performed on the edge of the composite frame 300b in step S153 to avoid deformation of the composite frame 300b or TP plastic chipping in step S153, the thickness margin of the skirt front surface 31 of the composite frame 300b in the Z-axis direction in step S151 is 0.16 to 0.24 mm.
Referring to fig. 6, in step S152, the skirt of the composite frame 300b is further processed, the fixing portion of the composite frame is cut off, and the peripheral regions of the battery compartment and the camera mounting area of the back side 32 of the composite frame 300b are precisely processed, and further, when the back side 32 of the composite frame 300b is precisely processed, a secondary outer edge stress groove 304 is formed in the skirt of the composite frame 300b to further release stress and improve the flatness effect.
Further, in order to reduce the cutting amount of the finish machining process performed on the edge of the composite frame 300b in step S153 to avoid deformation of the composite frame 300b or TP plastic chipping in step S153, the thickness margin of the skirt-side back surface 32 of the composite frame 300b in the Z-axis direction in step S152 is 0.4 to 0.6mm, preferably 0.5 mm.
Specifically, in step S152, the third jig platform 600 fixes the composite frame 300b through the fixing portion remaining on the edge of the composite frame 300b, and the third jig platform 600 sucks the front surface 31 of the composite frame 300b through the vacuum chuck 601; thus, the degree of adhesion between the front surface 31 of the composite frame 300b and the support surface of the third jig stage 600 is improved, and the flatness after processing is improved.
Referring to fig. 7, in step S153, the excess portion of the edge of the composite frame 300b is completely cut off to obtain a metal middle frame; when the edge of the composite frame 300b is subjected to finish machining, the fourth jig platform 700 provides point support for the edge portion of the composite frame 300b, and metal chips generated by cutting are discharged between the support points 701, so that the composite frame 300b is prevented from being deformed due to accumulation of the metal chips on the fourth jig platform 700.
When the edge of the composite frame 300b is subjected to finish machining, the composite frame 300b is placed on the fourth fixture platform 700, the metal cover plate 702 is placed above the composite frame 300b, and the electromagnet 703 in the fourth fixture platform 700 generates magnetic force on the metal cover plate 702, so that the composite frame 300b can be fixed on the fourth fixture platform 700, and the influence on the machining of the edge of the composite frame 300b is avoided.
When the edge of the composite frame body 300b is subjected to finish machining, cutting compensation is provided for a position where the edge of the composite frame body 300b is prone to upwarp or sag; specifically, the cutting depth is reduced in the region where the edge of the reverse side 32 of the composite frame body 300b is easily sunk, so as to ensure the flatness of the reverse side 32 of the composite frame body 300 b; optionally, the depth of cut may also be increased in areas where the edges of the reverse side 32 of composite frame 300b are prone to lifting.
Referring to fig. 2, further, according to the requirements of different intelligent electronic devices, the method for processing the metal middle frame further includes the following steps:
s21: heat radiating grooves are processed on the front surface 31 of the metal middle frame 300 to accommodate the heat radiating pipes.
S22: processing a side key hole and a clamping groove on the side edge of the metal middle frame 300;
s23: performing finish machining on a front camera assembly area of the metal middle frame 300;
s24: processing a microphone hole on the metal middle frame 300;
s25: processing a USB hole and a loudspeaker hole on the metal middle frame 300;
s26: cutting off the temporary positioning position on the back surface 32 of the metal middle frame 300;
the invention also provides a metal middle frame 300 which is manufactured by the processing method of the metal middle frame and is suitable for intelligent electronic equipment such as mobile phones and flat plates, so that the edge bonding effect of the metal middle frame 300 and a screen or a battery cover plate can be ensured.
In this embodiment, through grind respectively at the front and the reverse side of shaped metal before the former type of center grinds and the slot position processing and carry out the primary processing respectively, the initial recess of positive side and the initial recess of anti-side have produced the release to the stress of the former type of center to can avoid the follow-up processing of compound framework to produce local deformation and influence plane degree effect because of the effect of internal stress, guarantee that the metal center accords with the assembly requirement.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (9)
1. A processing method of a metal middle frame is characterized by comprising the following steps:
providing a metal section;
respectively carrying out primary processing on the front surface and the back surface of the metal section, cutting and processing a front side initial groove in the middle of the front surface of the metal section, and cutting and processing a back side initial groove in the middle of the back surface of the metal section to obtain a middle frame initial shape;
carrying out double-sided grinding on the primary shape of the middle frame;
processing an injection molding slot position and an antenna slot position on the middle frame prototype;
performing injection molding treatment on the initial shape of the middle frame to obtain a composite frame body;
performing finish machining on the composite frame body to obtain a metal middle frame;
in the primary processing of the reverse side of the metal section, a surface stress groove is formed in the skirt edge of the metal section; and performing surface nano corrosion on the middle frame prototype between the step of processing the injection molding slot position and the antenna slot position on the middle frame prototype and the step of performing injection molding treatment on the middle frame prototype.
2. The method for processing the metal middle frame according to claim 1, wherein an upper boss is reserved on the front surface of the metal section bar when the front surface of the metal section bar is subjected to primary processing; and when the back surface of the metal section is subjected to primary processing, a lower boss is reserved on the back surface of the metal section.
3. The method for processing the metal middle frame according to claim 1, wherein in the step of processing the injection molding slot and the antenna slot on the front surface of the primary shape of the middle frame, a first clamp platform for supporting the metal middle frame adsorbs the back surface of the metal middle frame through a first vacuum suction hole; and the step of performing finish machining on the composite frame body comprises the step of performing finish machining on the front surface of the composite frame body, and when the front surface of the composite frame body is subjected to the finish machining, a second clamp platform for supporting the composite frame body adsorbs the back surface of the composite frame body through a second vacuum suction hole.
4. The method of processing a metal middle frame according to claim 1, wherein the step of performing finish machining on the composite frame body includes performing finish machining on a front surface of the composite frame body and performing finish machining on a back surface of the composite frame body; when the front surface of the composite frame body is precisely machined, a primary outer edge stress groove is formed in the skirt edge of the composite frame body; and (3) precisely processing the reverse side of the composite frame body, and forming a secondary outer edge stress groove on the skirt edge of the composite frame body.
5. The method of claim 1, wherein the step of finishing the composite frame body comprises finishing the reverse side of the composite frame body, and when the finish machining is performed on the reverse side of the composite frame body, a third clamp platform fixes the composite frame body through a fixing portion reserved on the edge of the composite frame body, and the third clamp platform sucks the front side of the composite frame body through a vacuum chuck.
6. The method of claim 1, wherein the step of finishing the composite frame body comprises finishing edges of the composite frame body; and when the edge of the composite frame body is subjected to finish machining, the fourth clamp platform provides point support for the edge part of the composite frame body.
7. The method of claim 1, wherein the step of finishing the composite frame body comprises finishing edges of the composite frame body; when the edge of the metal middle frame is subjected to finish machining, the composite frame body is placed on a fourth fixture platform, a metal cover plate is placed above the composite frame body, and an electromagnet in the fourth fixture platform generates magnetic force on the metal cover plate.
8. The method of processing a metal center according to claim 1, wherein the finishing the composite frame body includes finishing edges of the composite frame body; and when the edge of the composite frame body is subjected to finish machining, cutting compensation is provided for a position where upwarp or sinking is easy to generate on the edge of the composite frame body.
9. A metal middle frame, characterized in that, it is manufactured by the method for processing a metal middle frame according to any one of claims 1 to 8.
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| CN108941919B (en) * | 2018-07-02 | 2020-09-04 | 广东长盈精密技术有限公司 | Laser etching method |
| CN109454410A (en) * | 2018-12-18 | 2019-03-12 | 深圳达闼科技控股有限公司 | A kind of processing method of mobile phone center, mobile phone center and mobile phone |
| CN109719502A (en) * | 2019-01-15 | 2019-05-07 | 广东长盈精密技术有限公司 | Center and its processing method |
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