CN109590525B - Special composite end mill for mobile phone middle frame and mobile phone middle frame milling method - Google Patents
Special composite end mill for mobile phone middle frame and mobile phone middle frame milling method Download PDFInfo
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- CN109590525B CN109590525B CN201811488597.3A CN201811488597A CN109590525B CN 109590525 B CN109590525 B CN 109590525B CN 201811488597 A CN201811488597 A CN 201811488597A CN 109590525 B CN109590525 B CN 109590525B
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- middle frame
- edge
- mobile phone
- end mill
- chamfer
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C5/00—Milling-cutters
- B23C5/02—Milling-cutters characterised by the shape of the cutter
- B23C5/10—Shank-type cutters, i.e. with an integral shaft
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C3/00—Milling particular work; Special milling operations; Machines therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C2210/00—Details of milling cutters
- B23C2210/20—Number of cutting edges
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Abstract
The invention discloses a special composite end mill for a mobile phone middle frame and a milling method for the mobile phone middle frame, wherein the special composite end mill for the mobile phone middle frame comprises the following components: shank and cutting edge, wherein the cutting edge includes: the chamfering blade, the peripheral blade and the bottom blade are arranged in sequence; the peripheral edge is formed by vertically and downwardly extending the lower end of the chamfering edge and is used for milling the side wall of the middle accommodating groove when the chamfering edge mills a chamfer between the surface walls; the bottom edge is parallel and level with the lower end of the peripheral edge and is used for milling the bottom wall of the middle containing groove and the top surface of the middle frame. Based on the structure, the special composite end mill for the middle frame of the mobile phone can mill the side wall of the middle accommodating groove and simultaneously process the chamfer between the surface walls, so that the tool changing time is saved, the time can be overlapped in the process of milling the side wall and chamfering, and the production efficiency is improved; meanwhile, the side wall of the middle accommodating groove can be used as a reference surface for processing the chamfer between the surface walls, so that the chamfer is stable and uniform in size, and the product yield is improved.
Description
Technical Field
The invention relates to the technical field of mobile phone middle frame milling methods, in particular to a special composite end mill for a mobile phone middle frame and a mobile phone middle frame milling method.
Background
The main cutting edge of the traditional end mill is on a cylindrical surface, and the cutting edge on the end surface is an auxiliary cutting edge; end mills without a central edge are not operable to move in a feed motion along the axial direction of the mill.
Milling cutters are generally divided into:
1. a flat-end milling cutter is used for carrying out finish milling or rough milling, milling grooves, removing a large number of blanks, and carrying out small-area flat-surface or outline finish milling;
2. the ball end milling cutter is used for performing curved surface semi-finish milling and finish milling; the small knife can finish mill a small chamfer of a steep surface/straight wall;
3. the round nose milling cutter performs rough milling with small change of a curved surface, less narrow sunken areas and more relatively flat areas;
4. the flat-end milling cutter is provided with a chamfer, can be used for rough milling to remove a large number of blanks, and can also be used for fine milling of a small chamfer of a fine flat surface (relative to a steep surface);
5. the formed milling cutter comprises a chamfer cutter, a T-shaped milling cutter or a drum-shaped cutter, a tooth-shaped cutter and an inner R cutter;
6. the shape of the chamfering cutter is the same as that of the chamfering cutter, and the chamfering cutter is divided into a milling round chamfer and a bevel chamfer milling cutter;
7, a T-shaped cutter capable of milling a T-shaped groove;
8. a tooth-shaped cutter for milling various tooth shapes such as gears;
9. a rough skin cutter, a rough milling cutter designed for aluminum-copper alloy cutting, can be rapidly processed.
After the middle frame of the mobile phone is injection molded, the structure is shown in fig. 1, and the middle frame of the mobile phone comprises: middle frame top surface 10 and middle part accepting groove 20, the lateral wall upper end of middle part accepting groove 20 is the same level with the middle frame top surface. After the injection molding, the middle frame of the mobile phone further needs to be milled on the top surface 10 and the side wall 21 of the middle receiving groove, and chamfered on the top surface 10 and the side wall 21 of the middle receiving groove, and the shape of the middle frame of the mobile phone after milling and chamfering is shown in fig. 2 and 3, wherein reference numeral 15 is a chamfer between the surface walls.
In the prior art, an end milling cutter is required to be used for processing the top surface of the middle frame and the side wall of the middle accommodating groove, and a chamfering cutter is used for processing chamfers, so that the time consumption is long, and the production efficiency is low.
It can be seen that the prior art is still in need of improvement and development.
Disclosure of Invention
In view of the above-mentioned deficiencies of the prior art, an object of the present invention is to provide a composite end mill for a middle frame of a mobile phone and a method for milling the middle frame of the mobile phone, which are intended to solve the problems of long time consumption and low production efficiency in the prior art that an end mill is required to process the top surface of the middle frame and the side wall of the middle accommodating groove, and a chamfering tool is required to process the chamfer.
The technical scheme of the invention is as follows:
a special compound end mill for a middle frame of a mobile phone comprises: a shank and a cutting edge, wherein the cutting edge comprises: the chamfering blade, the peripheral blade and the bottom blade are arranged in sequence; the peripheral edge is formed by vertically and downwardly extending the lower end of the chamfering edge and is used for milling the side wall of the middle accommodating groove when the chamfering edge mills a chamfer between the surface walls; the bottom edge is parallel and level with the lower end of the peripheral edge and is used for milling the bottom wall of the middle containing groove and the top surface of the middle frame.
In a further preferred scheme, the composite end mill special for the middle frame of the mobile phone further comprises: a chip flute extending downwardly from the lower end of the shank to the bottom edge.
In a further preferable scheme, the three chip flutes are arranged at intervals, and the chip flutes are right-handed chip flutes.
In a further preferred version, the helix angle of the flutes is 30 °.
In a further preferable scheme, the length of the cutting edge accounts for 3.71% -3.77% of the total length of the composite end mill, wherein the length of the projection of the chamfering edge on the axis of the composite end mill accounts for 1.72% -1.76% of the total length of the composite end mill, and the height of the peripheral edge accounts for 1.99% -2.01% of the total length of the composite end mill.
In a further preferable mode, the length of the peripheral edge is between 0.86mm and 0.88 mm.
In a further preferred version, the peripheral edge has a diameter of between 7.99mm and 8.01 mm.
In a further preferred embodiment, the chamfer edge has a slope of 44.5 ° to 45.5 °.
A mobile phone middle frame milling method realized based on the special composite end mill for the mobile phone middle frame comprises the following steps:
the chamfering blade is used for processing a chamfer between the surface walls, and the peripheral blade is used for milling the side wall of the middle containing groove at the same time until the chamfer processing between the surface walls and the milling of the side wall of the middle containing groove are finished;
the bottom blade mills the top surface of the middle frame and the bottom wall of the middle containing groove in sequence.
Compared with the prior art, the special composite end mill for the middle frame of the mobile phone, which is provided by the invention, comprises a handle part and a cutting edge, wherein the cutting edge comprises: the chamfering blade, the peripheral blade and the bottom blade are arranged in sequence; the peripheral edge is formed by vertically and downwardly extending the lower end of the chamfering edge and is used for milling the side wall of the middle accommodating groove when the chamfering edge mills a chamfer between the surface walls; the bottom edge is parallel and level with the lower end of the peripheral edge and is used for milling the bottom wall of the middle containing groove and the top surface of the middle frame. Based on the structure, the special composite end mill for the middle frame of the mobile phone can mill the side wall of the middle accommodating groove and simultaneously process the chamfer between the surface walls, so that the tool changing time is saved, the time can be overlapped in the process of milling the side wall and chamfering, and the production efficiency is improved; meanwhile, the side wall of the middle accommodating groove can be used as a reference surface for processing the chamfer between the surface walls, so that the chamfer is stable and uniform in size, and the product yield is improved.
Drawings
Fig. 1 is a schematic structural diagram of a first viewing angle of a middle frame of a mobile phone after injection molding.
Fig. 2 is a schematic structural diagram of a second viewing angle of the middle frame of the mobile phone after injection molding.
Fig. 3 is an enlarged view of a portion a in fig. 2.
Fig. 4 is a schematic structural view of a first view angle of a composite end mill specially used for a middle frame of a mobile phone according to a preferred embodiment of the invention.
Fig. 5 is a schematic structural view of a second perspective of the composite end mill specially adapted for the middle frame of a mobile phone according to the preferred embodiment of the present invention.
Fig. 6 is an enlarged view of a portion a in fig. 5.
Fig. 7 is a schematic structural diagram of a third perspective of the composite end mill specially adapted for middle frames of mobile phones according to the preferred embodiment of the present invention.
Fig. 8 is an enlarged view of a portion B in fig. 7.
Detailed Description
The invention provides a special composite end mill for a mobile phone middle frame and a mobile phone middle frame milling method, and in order to make the purpose, technical scheme and effect of the invention clearer and clearer, the invention is further described in detail below by referring to the attached drawings and taking examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
FIG. 1 is a schematic view of a first perspective of a middle frame of a mobile phone after injection molding; FIG. 2 is a schematic structural diagram of a second perspective of the middle frame of the mobile phone after injection molding; fig. 3 is an enlarged view of a portion a in fig. 2. Since the structure of the middle frame of the mobile phone is various and the present invention is not related to the structure except for the top surface 10 of the middle frame and the middle receiving groove, the present invention does not illustrate the grooves, holes and protrusions on the top surface 10 of the middle frame and the middle receiving groove 20 in fig. 1.
FIG. 4 is a schematic view of a composite end mill for a middle frame of a mobile phone according to a first embodiment of the present invention; FIG. 5 is a schematic structural view of a second perspective of the composite end mill specifically used for the middle frame of the mobile phone according to the preferred embodiment of the present invention; FIG. 6 is an enlarged view of detail A of FIG. 5; FIG. 7 is a schematic structural view of a third perspective of the composite end mill specifically used for mobile phone middle frames according to the preferred embodiment of the present invention; fig. 8 is an enlarged view of a portion B in fig. 7.
As shown in fig. 4 to 8, the composite end mill special for the middle frame of the mobile phone provided by the present invention includes: a shank 100 and a cutting edge. Different from the prior art in which a milling cutter is provided with a main cutting edge and an auxiliary cutting edge, the cutting edge of the present invention is provided with three edge parts: the three blade portions are respectively a chamfer blade 210, a peripheral blade 220 and a bottom blade 230 which are arranged in sequence.
The chamfer edge 210 is used for machining an inter-wall chamfer (the inter-wall chamfer is indicated by the reference numeral 15 in fig. 3), and during the machining process of the inter-wall chamfer, two differences exist from the prior art: 1. in the invention, the chamfering edge 210 and the peripheral edge 220 work simultaneously, and the chamfering edge performs milling on the side wall of the middle containing groove; 2. the peripheral edge 220 attached to the sidewall of the middle receiving groove can provide a reference for the chamfering process of the chamfering edge 210, so as to ensure the stability and uniformity of chamfering. The first point can improve the processing efficiency of the mobile phone middle frame, and the second point can improve the product yield of the mobile phone middle frame; that is to say, the lower end of the chamfer edge 210 extends vertically downwards to form the structure of the peripheral edge 220, so that the chamfer edge 210 and the peripheral edge 220 can work simultaneously, the processing efficiency of the middle frame of the mobile phone is improved, and the product yield of the middle frame of the mobile phone is also improved.
In a further preferred embodiment of the invention, the length of the cutting edge accounts for 3.71% -3.77% of the total length of the composite end mill, wherein the length of the projection of the chamfering edge 210 on the axis of the composite end mill accounts for 1.72% -1.76% of the total length of the composite end mill, and the height of the peripheral edge 220 accounts for 1.99% -2.01% of the total length of the composite end mill.
In the specific implementation, the length of the peripheral edge 220 is preferably 0.86 mm-0.88 mm, and further preferably 0.87 mm; and a diameter of between 7.99mm and 8.01mm, in particular 8 mm.
The chamfer edge 210 is further provided with a slope of 44.5 ° -45.5 °, in particular 45 °.
The bottom edge 230 is flush with the lower end of the peripheral edge 220, and is used for milling the bottom wall of the middle containing groove and the top surface of the middle frame. That is, the composite end mill provided by the invention has three functions: chamfering, milling side walls (side walls have arc-shaped surfaces and also have planes) and milling planes.
By arranging the bottom edge 230, before the chamfers among the top surface of the middle frame, the side wall of the middle containing groove, the bottom wall of the middle containing groove and the surface wall are all milled, the cutter does not need to be replaced, and the processing efficiency of the middle frame of the mobile phone is further improved.
In a further preferred embodiment of the present invention, the composite end mill specially used for the middle frame of the mobile phone further comprises: a chip flute 150, said chip flute 150 extending from the lower end of the shank 100 down to the bottom edge 230. The peripheral edges 220 of the conventional end mill are main cutting edges, and the chip flutes 150 are formed between the peripheral edges 220, that is, the chip flutes 150 are all formed on the edge portions; the present invention is different in that most of the chip flutes 150 are located at the lower end of the shank 100, and only the lower end of the chip flutes 150 penetrates the cutting edge, so that the chips can more easily enter the chip flutes 150.
Further, three chip flutes 150 are arranged at intervals, and the chip flutes 150 are right-handed chip flutes 150, and the helix angle thereof is 30 °.
The invention also provides a mobile phone middle frame milling method based on the special composite end mill for the mobile phone middle frame, which comprises the following steps:
the chamfering blade is used for processing a chamfer between the surface walls, and the peripheral blade is used for milling the side wall of the middle containing groove at the same time until the chamfer processing between the surface walls and the milling of the side wall of the middle containing groove are finished;
the bottom blade mills the top surface of the middle frame and the bottom wall of the middle containing groove in sequence.
During specific implementation, the top surface of the middle frame and/or the bottom wall of the middle containing groove can be milled, and then chamfering between the surface walls and processing of the side wall of the middle containing groove can be carried out; or the chamfering between the surface walls and the processing of the side wall of the middle containing groove can be carried out firstly, and then the milling of the top surface of the middle frame and/or the bottom wall of the middle containing groove can be carried out. The present invention is not particularly limited in this regard.
It is to be understood that the invention is not limited to the examples described above, but that modifications and variations may be effected thereto by those of ordinary skill in the art in light of the foregoing description, and that all such modifications and variations are intended to be within the scope of the invention as defined by the appended claims.
Claims (7)
1. A special compound end mill for a middle frame of a mobile phone comprises: shank and cutting edge, characterized in that, the cutting edge includes: the chamfering blade, the peripheral blade and the bottom blade are arranged in sequence; the peripheral edge is formed by vertically extending the lower end of the chamfer edge downwards, and is used for milling the side wall of the middle accommodating groove when the chamfer edge mills a chamfer between the surface walls and providing reference for the chamfering process of the chamfer edge in the milling process; the bottom blade is flush with the lower end of the peripheral blade and is used for milling the bottom wall of the middle containing groove and the top surface of the middle frame;
the special compound end mill of cell-phone center still includes: a chip pocket extending downwardly from a lower end of the shank to the bottom edge;
the lower end of the chip groove penetrates through the cutting edge;
three chip grooves are arranged at intervals, and the chip grooves are right-handed chip grooves;
the bottom edge is flush with the lower end of the peripheral edge;
the peripheral edge is arranged at the lower end of the chamfer edge in a protruding manner;
the chamfer edge and the peripheral edge rotate synchronously.
2. The composite end mill special for cell phone middle frames as claimed in claim 1, wherein the helix angle of the chip flutes is 30 °.
3. The composite end mill special for the middle frame of the mobile phone according to claim 1, wherein the length of the cutting edge accounts for 3.71% -3.77% of the total length of the composite end mill, wherein the length of the projection of the chamfer edge on the axis of the composite end mill accounts for 1.72% -1.76% of the total length of the composite end mill, and the height of the peripheral edge accounts for 1.99% -2.01% of the total length of the composite end mill.
4. The composite end mill special for the middle frame of the mobile phone according to claim 1, wherein the length of the peripheral edge is between 0.86mm and 0.88 mm.
5. The composite end mill special for the middle frame of the mobile phone according to claim 4, wherein the diameter of the peripheral edge is 7.99mm to 8.01 mm.
6. The special composite end mill for the middle frame of the mobile phone according to claim 1, wherein the inclination of the chamfer edge is 44.5-45.5 °.
7. A mobile phone middle frame milling method realized based on the special composite end mill for the mobile phone middle frame as claimed in any one of claims 1 to 6, characterized by comprising the following steps:
the chamfering blade is used for processing the chamfer between the surface walls, and the peripheral blade is used for milling the side wall of the middle containing groove and providing reference for the chamfering process of the chamfering blade at the same time until the chamfer processing between the surface walls and the milling of the side wall of the middle containing groove are finished;
the bottom blade mills the top surface of the middle frame and the bottom wall of the middle containing groove in sequence.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811488597.3A CN109590525B (en) | 2018-12-06 | 2018-12-06 | Special composite end mill for mobile phone middle frame and mobile phone middle frame milling method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811488597.3A CN109590525B (en) | 2018-12-06 | 2018-12-06 | Special composite end mill for mobile phone middle frame and mobile phone middle frame milling method |
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| CN109590525A CN109590525A (en) | 2019-04-09 |
| CN109590525B true CN109590525B (en) | 2020-10-23 |
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| CN112327748B (en) * | 2020-10-28 | 2021-09-21 | 东莞长盈精密技术有限公司 | Mobile terminal, metal middle frame and contour curved surface processing method thereof |
| CN113385723B (en) * | 2021-06-02 | 2022-09-06 | 东莞长盈精密技术有限公司 | Milling cutter |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH10249805A (en) * | 1997-03-17 | 1998-09-22 | Sekisui Chem Co Ltd | Router cutting edge |
| JP2005238414A (en) * | 2004-02-27 | 2005-09-08 | Kanefusa Corp | End mill with chamfering blade |
| CN100537093C (en) * | 2005-03-28 | 2009-09-09 | Osg株式会社 | Radius end mill |
| JP5803647B2 (en) * | 2011-02-16 | 2015-11-04 | 三菱日立ツール株式会社 | End mill |
| RU2019114463A (en) * | 2016-11-15 | 2020-12-17 | Сумитомо Электрик Хардметал Корп. | CUTTING TOOL AND CUTTING METHOD |
| CN206912324U (en) * | 2017-05-23 | 2018-01-23 | 东莞富兰地工具股份有限公司 | Combination socket milling forming cutter |
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Effective date of registration: 20210305 Address after: 518000 building 12, 13, 16, 17, block a, Gonghe first industrial zone, Shajing street, Bao'an District, Shenzhen City, Guangdong Province Patentee after: Jieyao Precision Hardware (Shenzhen) Co.,Ltd. Address before: 523879 Xin'an Industrial Park, Chang'an Town, Dongguan City, Guangdong Province Patentee before: CHITWING (DONGGUAN) TECHNOLOGY Co.,Ltd. |
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