WO2018137291A1

WO2018137291A1 - Machining tool and method for machining micro-slot antennas using same

Info

Publication number: WO2018137291A1
Application number: PCT/CN2017/080916
Authority: WO
Inventors: 尹帮实; 罗建红; 郭文平; 郭阳
Original assignee: 华为技术有限公司
Priority date: 2017-01-26
Filing date: 2017-04-18
Publication date: 2018-08-02
Also published as: CN108602143B; CN108602143A

Abstract

A machining tool, comprising at least two slicing cutters (1) and a slicing cutter connecting shaft (2); each slicing cutter (1) comprises an annular cutter head (11) and a toothed cutting portion (12) provided at the outer periphery of the annular cutter head (11); the toothed cutting portion (12) comprises a tooth root (121) fixedly connected to the outer periphery of the annular cutter head (11) and a cutting edge (122) extending outwards along the radial direction of the annular cutter head (11); the at least two slicing cutters (1) are sleeved on the slicing cutter connecting shaft (2) in parallel, and are fixedly connected to the slicing cutter connecting shaft (2) by means of an inner edge of the annular cutter head (11), separately. Also involved is a method for machining micro-slot antennas using the machining tool.

Description

Processing tool and method for processing micro-slit antenna using the same

The present application claims priority to Chinese Patent Application No. JP-A No. No. No. No. No. No. No. No. No. No. No. No. No. No. No. No. No. No. In this application.

Technical field

The present application relates to the field of machining technology, and in particular to a machining tool and a method for processing a microslot antenna using the same.

Background technique

With the improvement of people's aesthetic level, people's requirements for the appearance of various metal products are getting higher and higher. Especially in the field of electronics, the micro-slit antenna can be said to be one of the latest mobile phone antenna designs. The micro-slit antenna on the back of the fuselage The micro-seam is only 0.4mm wide, and it is processed into the whole metal one-piece casing design through a precise computer numerical control machine (CNC) program, and the micro-seam is filled by the nano-injection process to make the whole metal machine The body is more integrated, which makes the micro-slit antenna and the metal shell color of the mobile phone itself consistent, and the soft transition of the micro-seam of the mobile phone can bring a new visual beauty.

However, nowadays mobile phone micro-slit antenna processing mainly uses a single-piece knife to process micro-seam one by one. It is assumed that there are five micro-seams to be processed, one time for processing one micro-seam is T, and the time for processing five micro-seams is 5T, processing time Longer and less productive. At the same time, since each micro-slit is independently processed, it is necessary to consider the parallelism and gap between the micro-slits for each processing, which requires high processing precision and low yield, which results in high production cost.

Summary of the invention

The main object of the present application is to provide a machining tool and a method for processing the microslit antenna using the tool, which can shorten the processing time, improve the production efficiency, improve the yield rate, and reduce the production cost.

In order to achieve the above object, the patent application adopts the following technical solutions:

In a first aspect, the present application provides a machining tool comprising: at least two blade cutters and a blade cutter connecting shaft; each blade cutter comprises an annular cutter head, and a toothed cutting portion disposed at a periphery of the outer edge of the annular cutter head The toothed cutting portion includes a root fixedly coupled to an outer edge of the annular cutter head and a cutting edge extending radially outward along the annular cutter head, the at least two blade cutters being sleeved in parallel to the blade cutter The shaft is fixedly connected to the blade connecting shaft through the inner edge of the annular cutter. When the micro-seam is processed by using the processing tool, a plurality of micro-slit structures can be formed on the processed workpiece only by performing a single processing, and the parallel spacing of the micro-seam structures and the spacing between adjacent micro-slit structures can be kept constant. It overcomes the defects that need to be processed one by one when processing a plurality of micro-slit structures, so that the precision of each processing is high, and the processing time is long, the production efficiency is low, and the yield rate is low.

In a first possible implementation of the first aspect, a gap is left between the roots of each two adjacent toothed cutting portions, and the annular cutter head is provided with a chip flute corresponding to the gap position. By leaving a gap between the roots of the adjacent toothed cutting portions and opening a chip flute at the position corresponding to the gap of the annular cutter, when the micro-slit structure is processed by the machining tool, the toothed cutting portion will The cutting layer is cut into chips, and the cutting chips formed by the cutting can enter the gap and the chip flute, thereby ensuring the smooth discharge of the chips.

In a second possible implementation manner of the first aspect, the annular cutter head includes two surfaces facing each other in the axial direction, the chip flute is formed on at least one surface of the annular cutter disc, and the flute is configured A U-shaped groove that opens from the gap position and extends in the radial direction of the annular cutter. With this structure, the chips can be smoothly guided through the U-shaped groove, facilitating the smooth discharge of the chips.

In a third possible implementation of the first aspect, the chip flutes are symmetrically formed on both surfaces of the annular cutter head. It can ensure the smooth discharge of cutting chips to the greatest extent.

In a fourth possible implementation manner of the first aspect, the bottom surface formed on the opening surface of the U-shaped groove is a concave curved surface. It can prevent the residual and accumulation of cutting chips, and facilitate the flushing of the cutting fluid by the cutting fluid and the export of cutting chips.

In a fifth possible implementation of the first aspect, the spacing between each two adjacent blades is 0.3-2 mm. By controlling the spacing between the blade cutters of the machining tool within the range, when the microslit antenna is processed by the machining tool, the distance between the obtained micro-slit structures can be maintained within the range, and the micro-slit antenna can be satisfied. Processing needs.

In a sixth possible implementation of the first aspect, the cutting edge has a thickness in the axial direction of the annular cutter head of 0.3-0.5 mm. With this configuration, it is possible to control the slit width of the processed micro slits within this range, and also to satisfy the processing requirements of the micro slit antenna.

In a second aspect, the present application provides a method of processing a microslit antenna, including:

Cutting a predetermined area of the metal casing by using the machining tool as described above, cutting the first surface of the predetermined area and the second surface opposite to the first surface to advance in the metal casing The region is processed with at least two parallel micro-slit structures; the micro-slit structure is filled with a plastic material to form a micro-slit antenna. By cutting the predetermined area of the metal casing by using the machining tool described above, and cutting the first surface of the predetermined area and the second surface opposite to the first surface, the metal casing can be The preset area is processed at one time to form a plurality of parallel micro-slit structures, and by filling the plastic material in the micro-seam structure, the micro-slit antenna can be obtained, which can be shortened compared with the prior art processing by a single blade cutter. Processing time, improve production efficiency, improve yield and reduce production costs.

In a first possible implementation of the second aspect, before the cutting of the predetermined area of the metal casing by the machining tool, the method further comprises:

A lining connecting the portions on both sides of the micro-slit structure is formed on the second surface of the predetermined region. When processing micro-seams, it is possible to avoid the occurrence of micro-slit breakage, sinking and bending during processing, to ensure the structural stability of the micro-seam and further improve the yield.

In a second possible implementation of the second aspect, the lining is a machining allowance reserved on the second surface, or the lining is a metal member joined to the second surface by welding. With this structure, a plurality of blade cutters simultaneously perform a cutting motion during processing, and the generated heat can be transmitted to the entire metal casing through the binder, thereby ensuring rapid heat dissipation.

In a third possible implementation of the second aspect, the second surface is a surface opposite the design surface of the metal casing. After the lining is removed, the flatness of the appearance surface of the metal casing is not affected, and the surface treatment process generated by the arranging on the design surface can be avoided, and the production efficiency is improved.

In a third aspect, the present application provides a terminal housing that is machined using the method provided above.

In a fourth aspect, the present application provides a terminal device including the terminal housing as provided above.

In a possible implementation manner of the fourth aspect, the terminal device is a mobile phone, a tablet computer, a digital camera, or a netbook.

The present application provides a machining tool and a method for processing a microslit antenna using the same, by providing at least two blade cutters and fixing them in parallel on the blade connecting shaft, when the microslit structure is processed by the machining tool, By rotating the blade at a high speed at the same time, the workpiece can be processed, and a plurality of micro-slit structures can be formed on the workpiece at one time, which overcomes the need to process one by one when processing a plurality of micro-slit structures, so that each The precision of secondary processing is high, and the defects of long processing time, low production efficiency and low yield are obtained.

DRAWINGS

1 is a schematic structural view of a blade cutter provided by the present application;

2 is a schematic structural view of a processing tool provided by the present application;

3 is a schematic structural view of a chip flute formed on at least one surface of an annular cutter head according to the present application;

4 is a schematic structural view of the present application based on FIG. 3 in the A-A' direction;

FIG. 5 is a schematic structural view of a U-shaped groove provided by the present application; FIG.

6 is a schematic structural view of a method for processing at least two micro-slit structures on a metal casing according to the present application;

Figure 7 is a schematic view showing the structure of the B-B' direction based on Figure 6 provided by the present application;

Wherein, the blade cutter-1; the blade cutter connecting shaft-2; the annular cutter head-11; the toothed cutting portion-12; the root root-121; the cutting edge-122; the gap-13; the chip flute-3; the bottom surface-31 ; metal casing - 100; first surface - 101; second surface - 102; micro-slit structure - 103;

detailed description

The embodiments of the present application will be described in detail below with reference to the accompanying drawings.

In a first aspect, the present application provides a machining tool, see FIGS. 1 and 2, comprising: at least two blade cutters 1 and a blade cutter connecting shaft 2; each blade cutter blade 1 includes an annular cutter head 11 and is disposed therein a toothed cutting portion 12 having a peripheral edge of the annular cutter head 11 , the toothed cutting portion 12 including a root 121 fixedly coupled to an outer edge of the annular cutter 11 and extending radially outwardly of the annular cutter 11 The cutting edge 122, the at least two blade cutters 1 are sleeved in parallel on the blade connecting shaft 2, and are fixedly connected to the blade connecting shaft 2 through the inner edge of the annular cutter head 11, respectively.

"Parallel" here refers to the parallel within the allowable error range.

The at least two blade cutters 1 can be fixedly connected to the blade connecting shaft 2 through the inner edge of the annular cutter head 11. There may be various connection manners. Illustratively, the blade connecting shaft 2 may have a convex surface. The cylindrical shaft, correspondingly, the position of the annular cutter 11 corresponding to the protrusion is a recess that is matched with the protrusion, so that after the annular cutter head 11 is assembled on the blade connecting shaft 2, the rotation process can be performed. In the middle, the slippage between the cutter head 11 and the blade connecting shaft is prevented.

The present application provides a machining tool by arranging at least two blade cutters 1 and fixing them in parallel on the blade connection shaft 2, and by processing the microslit structure with the machining tool, by simultaneously making the blade 1 high speed Rotating, processing the workpiece, can form multiple micro-slit structures on the workpiece at one time, overcoming the need to process one by one when processing multiple micro-slit structures, so that the precision of each processing is higher And the defect that the processing time is long, the production efficiency is low, and the yield rate is low.

In a possible implementation manner of the present application, with continued reference to FIG. 1 and FIG. 2, a gap 13 is left between the roots 121 of each two adjacent toothed cutting portions 12, and the annular cutter head 11 corresponds to the gap 13 A chip flute 3 is provided at the position. With the rotation of the blade 1, the cutting layer on the workpiece is cut into chips, and the cutting amount generated by the cutting of the plurality of blades is extremely large compared with the single-piece machining. With this structure, the chips to be cut are used. The gap 13 and the chip flute 3 can be entered, so that the smooth discharge of the chips can be ensured, and the cutting movement can be ensured normally.

Here, the specific structure of the chip flute 3 is not limited as long as the chips can be smoothly discharged during the cutting process.

In a possible structure of the present application, referring to FIG. 3, the annular cutter head 11 includes two surfaces facing each other in the axial direction, and the chip flute 3 is formed on at least one surface of the annular cutter head 11, and The chip flute 3 is a U-shaped groove that opens from the position of the gap 13 and extends in the radial direction of the annular cutter head 11.

Wherein, the opening from the gap position means that the open end of the opened U-shaped groove communicates with the gap, and the radial direction of the annular cutter head 11 refers to the connection between the center of the annular cutter head 11 and the gap. In the direction, since the chip flute 3 is a U-shaped groove, it can be known that the end of the U-shaped groove opposite to the open end in the radial direction of the annular cutter head 11 is a closed end.

With this structure, the chips can enter the U-shaped groove through the gap 13 and be smoothly guided through the U-shaped groove, facilitating the smooth discharge of the chips.

In another possible configuration provided by the present application, referring to FIG. 4, the chip flutes 3 are symmetrically opened on both surfaces of the annular cutter head 11. In this way, during the cutting process, the generated chips can be led out from the two U-shaped grooves at the gap 13, respectively, and the smooth discharge of the chips can be ensured to the utmost extent.

Further, referring to FIG. 5, in order to prevent the accumulation and residue of the chips in the U-shaped groove, the cutting chips can be smoothly discharged along the U-shaped groove during the cutting process. Alternatively, the U-shaped groove is on the opening surface. The bottom surface 31 formed is a concave curved surface.

Here, the bottom surface formed by the U-shaped groove on the opening surface refers to the surface observed from a direction perpendicular to the opening surface.

In an example of the present application, the spacing between each two adjacent blade cutters is 0.3-2 mm. By controlling the pitch between the blade cutters 1 within the range, when the microslit antenna is processed by the machining tool, the pitch between the obtained microslit structures can be kept within the range, thereby being able to satisfy the existing Processing needs.

In still another example of the present application, the thickness of the cutting edge 122 in the axial direction of the annular cutter head 11 is 0.3-0.5 mm. With this configuration, it is possible to control the slit width of the processed micro-seam structure within this range, and it is also possible to satisfy the existing processing requirements.

The toothed cutting portion 12 and the annular cutter head 11 may be integrally formed or may be joined together by welding. When the toothed cutting portion 12 is integrally formed with the annular cutter head 11, the finished product has a distinct integral feature, or has a closed surrounding shape, and has high dimensional stability; and when the toothed cutting portion 12 and the ring shape When the cutter head 11 is welded and connected, the processing technology is mature and easy to process and shape.

In a second aspect, the present application provides a method of processing a microslit antenna, see FIG. 6 and FIG. 7, including:

The predetermined area of the metal casing 100 is cut by the machining tool as described above, and the first surface 101 of the predetermined area and the second surface 102 opposite to the first surface 101 are cut through to the metal The predetermined area of the housing 100 processes at least two parallel micro-slit structures 103; the micro-slit structure 103 is filled with a plastic material to form a micro-slit antenna.

The present application provides a method of processing a microslit antenna by cutting a predetermined area of the metal casing 100 by using the machining tool described above, and the first surface 101 of the predetermined area and the first surface 101 The opposite second surface 102 is cut through, and a plurality of parallel micro-slit structures 103 can be formed at a time in a predetermined area of the metal casing 100. By filling the micro-seam structure 103 with a plastic material, a micro-seam can be obtained. The antenna can shorten the processing time, improve the production efficiency, improve the yield rate, and reduce the production cost compared with the prior art processing by a single chip cutter.

It should be noted that, when the micro slit is processed by the machining tool, the rotation movement of the blade and the feeding motion of the blade and/or the metal casing 100 are taken from one side of the metal casing 100 as a starting point. Cutting the cutting layer on the metal casing 100 to obtain a micro-slit structure 103 penetrating the two sides of the metal casing 100. In the prior art, when the micro-seam is processed by a single-piece blade, usually in the metal shell The linings are formed on both sides of the body 100 to maintain the stability of the microslit structure, and the splicing is removed after the microslit antenna is processed.

In an exemplary embodiment of the present application, before cutting a predetermined area of the metal casing 100 with a machining tool, with continued reference to FIGS. 6 and 7, the method further includes: forming on the second surface 102 of the predetermined area A web 104 connecting the portions on both sides of the microslit structure 103. By providing the lining on the second surface 102, the structural stability of the micro slit can be further ensured compared with the prior art in which the lining is disposed on both sides of the metal casing 100, thereby avoiding the occurrence of micro slits during the processing. Bad phenomena such as breakage, sinking and bending improve the yield.

In still another example of the present application, the lining 104 is a machining allowance reserved on the second surface 102, or the lining 104 is a metal member attached to the second surface 102 by welding. With this structure, a plurality of blade cutters simultaneously perform a cutting motion during processing, and the generated heat can be transmitted to the entire metal casing 100 through the binder, thereby ensuring rapid heat dissipation.

In this process, the machining accuracy can be effectively controlled by controlling the size of the binder.

In an embodiment of the present application, the second surface 102 is a surface opposite to the design surface of the metal casing 100. Wherein, the appearance of the metal casing 100, as the name implies, refers to a surface that can be directly observed. With this structure, after the removal of the binder, the flatness of the appearance surface of the metal casing is not affected, and the material can be avoided. Set the surface treatment program generated on the design surface to improve production efficiency.

The present application provides a terminal housing, which can be obtained by forming a plurality of parallel micro-slit structures in a predetermined area of a metal housing, and by filling the plastic material in the micro-seam structure, the micro-slit antenna can be obtained. In the prior art, the processing time can be shortened by a single blade cutter, the production efficiency can be shortened, the processing precision can be improved, and the yield of the terminal housing can be improved, and the production cost can be reduced.

The type of the terminal device is not limited.

Illustratively, the terminal device can be a mobile phone, a tablet, a digital camera or a netbook.

Finally, it should be noted that the above description is only a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto, and any changes or substitutions within the technical scope disclosed in the present application should be covered in the present application. Within the scope of protection of the application. Therefore, the scope of protection of this application should be determined by the scope of protection of the claims.

Claims

A processing tool, comprising:

At least two pieces of knife and a blade are connected to the shaft;

Each of the blade cutters includes an annular cutter disk, and a toothed cutting portion disposed at a periphery of the outer periphery of the annular cutter disk, the toothed cutting portion including a tooth root fixedly coupled to an outer edge of the annular cutter disk and a cutting edge extending radially outward of the annular cutter disc, the at least two blade cutters being sleeved in parallel on the blade cutter connecting shaft, and respectively passing through the inner edge of the annular cutter head and the sheet The knife connection shaft is fixedly connected.
The machining tool according to claim 1, wherein a gap is left between the roots of each of the two adjacent toothed cutting portions, and the annular cutter disk is provided with a chip flute corresponding to the gap position.
The machining tool according to claim 2, wherein said annular cutter head comprises two surfaces facing each other in the axial direction, said chip passage groove being formed on at least one surface of said annular cutter head, and The flute is a U-shaped groove that opens from the gap position and extends in a radial direction of the annular cutter.
The machining tool according to claim 3, wherein said chip flutes are symmetrically formed on both surfaces of said annular cutter.
The machining tool according to claim 3 or 4, wherein the bottom surface formed on the opening surface of the U-shaped groove is a concave curved surface.
The machining tool according to claim 1, wherein the spacing between each two adjacent blade cutters is 0.3-2 mm.
The machining tool according to claim 1, wherein the cutting edge has a thickness of 0.3 to 0.5 mm in the axial direction of the annular cutter.
A method for processing a microslit antenna, comprising:

Cutting a predetermined area of the metal casing with the machining tool according to any one of claims 1 to 7, cutting the first surface of the predetermined area and the second surface opposite to the first surface Wearing to process at least two parallel micro-slit structures in a predetermined area of the metal casing; filling the micro-slit structure with a plastic material to form a micro-slit antenna.
The method according to claim 8, wherein before the cutting of the predetermined area of the metal casing by the machining tool, the method further comprises:

A lining connecting the portions on both sides of the microslit structure is formed on the second surface of the metal casing.
The method of claim 9 wherein:

The lining is a machining allowance reserved on the second surface, or the lining is a metal member joined to the second surface by welding.
A method according to any one of claims 8-10, wherein

The second surface is a surface opposite the design surface of the metal casing.
A terminal housing, characterized in that the terminal housing is obtained by processing according to the method of any one of claims 8-11.
A terminal device comprising the terminal housing of claim 12.
The terminal device according to claim 13, wherein the terminal device is a mobile phone, a tablet computer, a digital camera or a netbook.