CN208303973U - A kind of drill bit for soft board - Google Patents
A kind of drill bit for soft board Download PDFInfo
- Publication number
- CN208303973U CN208303973U CN201820582251.9U CN201820582251U CN208303973U CN 208303973 U CN208303973 U CN 208303973U CN 201820582251 U CN201820582251 U CN 201820582251U CN 208303973 U CN208303973 U CN 208303973U
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- CN
- China
- Prior art keywords
- drill
- soft board
- drill body
- drill bit
- apex
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 230000017525 heat dissipation Effects 0.000 claims abstract description 13
- 239000000203 mixture Substances 0.000 abstract description 2
- 238000005520 cutting process Methods 0.000 description 10
- 230000003064 anti-oxidating effect Effects 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 241001074085 Scophthalmus aquosus Species 0.000 description 1
- 229910009043 WC-Co Inorganic materials 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 230000002459 sustained effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Drilling Tools (AREA)
Abstract
The utility model discloses the drill bits for soft board, including drill body and shank, symmetrical apex face and two symmetrical auxiliary knife faces there are two being set at the top of drill body, along the circumferential direction of drill body, successively alternate setting forms apex point to two apex faces with two auxiliary knife faces, helical flute there are two being also set up on drill body, apex point at the top of two helical flutes and drill body cooperates, it is arranged along drill body towards shank since apex point, and two helical flutes are parallel same angled arrangement, there are also multiple symmetrical heat dissipation grooves for two chip space backs.There are two chip spaces for the soft board drill bit tool of the utility model composition, while the back of chip space has multiple symmetrical grooves to be conducive to heat dissipation, and conducive to the holding of dimensional stability, and entirety is high in ST type intensity, double spiral groove chip removal is smooth, it is high to grind the often service life again.
Description
Technical field
The utility model relates to micro drill field more particularly to a kind of drill bits for soft board.
Background technique
Printed circuit board is one of important component of electronics industry.Almost every kind of electronic equipment is small to electronic watch, calculating
Device arrives greatly computer, communication electronic device, military issue weapons system, as long as there is the electronic components such as integrated circuit, in order to electrical mutual
Even, printing plate will be used.The substrate of PCB mostly by insulation, it is heat-insulated, be not easy to curved epoxy resin and glass fibre dry goods
Made by material, there are certain thickness and intensity, electronic component can be installed and bear certain mechanical force, i.e. hardboard.But
Requirement is just unable to reach in the position hardboard for needing three-dimensional installation and cannot influence signal transmission.So utilizing PI or PET class
The soft board that goes out of material design, the effects of being bent locally, play transmission and connection, be able to satisfy that hardboard is not achieved is wanted
It asks.
And since two thousand eight, the global soft board output value keeps sustained, stable growth, and by 2016, the global soft board output value was taken
The compound speedup for obtaining 6.5%, the specific gravity for accounting for PCB industry are stablized 20% or more.It will it is expected that soft board annual value of production in 2021 is estimated
More than 12,500,000,000 dollars, accounting is expected to be promoted to 21% in the pcb.
The good development prospect of soft board industry brings huge opportunity for related industry and also brings challenge.Machine drilling
As the attached industry of processing circuit board, the target drill that great effort exploitation is suitable for soft board is put into.To from theoretical and actual measurement
Long service life is designed, cutter consumed cost can be greatly reduced, and improve the soft board drill bit of production efficiency.
Utility model content
For the problems of existing pcb board drill bit, need to want a kind of target drill suitable for soft board.
For this purpose, the technical problem to be solved by the utility model is to provide a kind of drill bit for soft board, it is existing to overcome
The problems of technology.
To solve the above-mentioned problems, the drill bit provided by the utility model for soft board, including drill body and shank, institute
State symmetrical apex face and two symmetrical auxiliary knife faces there are two setting at the top of drill body, two apex faces and two auxiliary knife face edges
Successively alternate setting forms apex point to the circumferential direction of drill body, is also set up on the drill body there are two helical flute, described
Apex point at the top of two helical flutes and drill body cooperates, and is arranged along drill body towards shank since apex point, and two
A helical flute is parallel same angled arrangement, and there are also multiple symmetrical heat dissipation grooves for described two chip space backs.
Further, the outer diameter of the drill body is 0.10~0.45mm.
Further, the bit tip angle that the drill bit apex face and auxiliary knife face are formed is 120~140 °.
Further, two helical flute helical angles of the drill bit are 30~40 °, and slot length is between 2.0~3.0mm.
Further, the heat dissipation groove section is arc-shaped.
Further, the length of the heat dissipation groove is between 0.05~0.10mm, be recessed depth between 0.005~
0.020mm。
The soft board drill bit tool that the utility model is constituted there are two chip space, while the back of chip space have it is multiple symmetrical recessed
Slot is conducive to heat dissipation, and conducive to the holding of dimensional stability, and whole is in that ST type intensity is high, double spiral groove chip removal is smooth, can grind again
Often the service life is high.
Detailed description of the invention
The utility model is further illustrated below in conjunction with the drawings and specific embodiments.
Fig. 1 is the example schematic for the drill bit for soft board that the utility model provides；
Fig. 2 is the apex point position schematic diagram of drill bit shown in Fig. 1.
Specific embodiment
In order to be easy to understand the technical means, creative features, achievement of purpose, and effectiveness of the utility model, under
Face combines and is specifically illustrating, and the utility model is further described.
Referring to Fig. 1 and Fig. 2 which shows the topology example for the soft board target drill that this example provides.As seen from the figure, this is soft
Plate target drill 100 mainly includes 120 two parts of drill handle part 110 and ontology.
Wherein, split settings between drill handle part 110 and drill body 120, connect structure by welding structure between the two
At soft board target drill 100.
Drill handle part 110 in this soft board target drill 100 is constituted using stainless steel, i.e., proof strength can reduce into again
This.The drill bit shank 110 is generally cylindrical, and connecting pin is provided with connection changeover portion 111, and the connection changeover portion 111 is whole
To be round table-like, end face is as joint face, for connecting drill body 120.
Overall structure for drill handle part 110 but it is not limited to above-mentioned cylinder, the drill bit shank 110 as needed is whole
Three-level frustum cone structure also can be used in body, and the first rotary table section is welded as linkage section and changeover portion and drill body 120, the second rotary table
Section constitutes the main body of entire drill handle part 110, and drill handle part is convenient in the big section mating connection of small end and the first rotary table section in this way
Installing and using for 110 entirety, improves the reliability that entire soft board target drill 100 uses；Third rotary table section is big as tail end
End and the big section of the second rotary table section are cooperatively connected.
Cutting portion of the drill body 120 as entire drill bit in this soft board target drill 100, it is whole using using fine grain
Grain, the high amount containing cobalt WC-Co series hard alloy be prepared, preferably 0.3 μm of fine grain in this example approach, Co content is 8%
High rigidity, high-flexural strength cemented carbide material, thus to improve the intensity of high multilayer circuit board drill bit, reduction drilled
The broken needle risk of journey.
Thus whole using formation one is connected using high frequency soldering between the drill body 120 with drill handle part 110 of structure
Thus body constitutes soft board target drill 100.
On this basis, the top of the cutting portion 120 (drill body 120) in this example is specifically set leads there are two symmetrical
Knife face 121,122, two symmetrical auxiliary knife faces 123,124 and corresponding two helical flutes 125 and 126.
Referring to fig. 2, two apex faces 121,122 are using the central point at 120 top of cutting portion as symmetric points in this example, symmetrically
Distribution；Two auxiliary knife faces 123,124 are successively along two main cutting edges 121,122 simultaneously, and equally in the top of cutting portion 120
Heart point is symmetric points, symmetrical；That is between two apex faces 121,122 and two auxiliary knife faces 123,124 at the top of cutting portion
Thus circumferential successively alternate setting constitutes apex point.
By many experiments it was determined that being arranged symmetrically by two apex faces being arranged symmetrically 121,122 with two auxiliary
Cooperate the apex point of composition between knife face 123,124, preferably 120~140 ° of angle [alpha], the cutting that can be optimal in this way is imitated
Fruit.
For above-mentioned apex point, two helical flutes 125 and 126 are arranged since apex point around 120 spiral of cutting portion,
Helical angle is 30~40 °.Biggish drill point angle cooperates biggish helical angle, ensure that the stable control with balance of drill bit part
Outside ability, but also blade is sharper keen and is conducive to cutting.In addition, two helical flutes are parallel same angled arrangement.This is constituted
With biggish chip space, guarantees that chip removal is unobstructed, reduce the friction between chip and hole wall, can preferably guarantee hole wall product
Matter.
On this basis, this example is also further equipped in the slot back of two helical flutes 125,126 multiple symmetrical
Radiate groove 127,128.
The length direction shape of these heat dissipation grooves 127,128 and drill body 120 forms an angle between 30~50 °, if
It sets in two helical flutes 125,126 corresponding slot backs, in the circumferential direction of drill body 120, is symmetrical arranged.
For the structure for the groove 127,128 that radiates, advantageous cross sections are arc-shaped in this example.And the heat dissipation groove
Length is recessed depth between 0.005~0.020mm, the depth of groove cannot be excessive to influence drill bit between 0.05~0.10mm
Whole rigidity, depth are no more than the 5% of the entire outer diameter of drill bit.It can be conducive to improve by the heat dissipation groove of such structure
The heat sinking function of boring procedure, can accelerate it is hot in boring procedure shed, reduce plate due to heat accumulation caused by deformation etc.
It is bad, guarantee wall quality, substantially increases applicability of the drill bit on soft board.
In addition, being not limited to the structure that cross section is arc-shaped for the structure for the groove that radiates, U can also be used as needed
Shape, V-arrangement or rectangular.
Soft board target drill 100 based on above structure forecast scheme configuration can meet the requirement of the high size of high-precision.
This drill bit 100 has multiple symmetrical grooves to be conducive to relative to existing soft board drill bit, two chip space back
Heat dissipation is especially advantageous for the holding of dimensional stability, and entirety ST type intensity is high, double spiral groove chip removal is smooth, can grind number again
More service life are high, can meet the needs of soft board production very well.
The soft board target drill 100 of such structure is being embodied, and the outer diameter of drill body 120 preferably 0.10~
0.45mm, and the sword of cutting portion is long and the ratio of drill body outer diameter is between 10~30, such design can be used for high multilayer
The application of wiring board, and meet the high benefit of lamination number and promoted.
Furthermore one layer of anti oxidation layer can be coated, on soft board target drill 100 also as needed to improve entire drill bit
Service life.
The mode that even thickness can be used in the anti oxidation layer covers the drill body 120 or entire soft board of soft board target drill 100
Target drill 100.
Likewise, the covering scheme of non-even thickness can also be used in the anti oxidation layer, the thickness of anti oxidation layer can be in drill bit to brill
Shank variation, such as can be gradually thinning to drill shank direction along drill bit.
Soft board drill bit may make to remain optimal performance in use by the anti oxidation layer.
Basic principles, main features, and advantages of the present invention has been shown and described above.Current row
The technical staff of industry is described in above embodiments and description it should be appreciated that the present utility model is not limited to the above embodiments
Only illustrate the principles of the present invention, on the premise of not departing from the spirit and scope of the utility model, the utility model is also
It will have various changes and improvements, these various changes and improvements fall within the scope of the claimed invention.The utility model
Claimed range is defined by the appending claims and its equivalent thereof.
Claims (6)
1. being used for the drill bit of soft board, including drill body and shank, which is characterized in that there are two being set at the top of the drill body
Symmetrical apex face and two symmetrical auxiliary knife faces, two apex faces and two auxiliary knife faces successively alternate are set along the circumferential direction of drill body
It sets to form apex point, be also set up on the drill body there are two helical flute, described two helical flutes and drill body
The apex point at top cooperates, and is arranged along drill body towards shank since apex point, and two helical flutes are parallel same angle
Structure, there are also multiple symmetrical heat dissipation grooves for described two chip space backs.
2. the drill bit according to claim 1 for soft board, which is characterized in that the outer diameter of the drill body be 0.10~
0.45mm。
3. the drill bit according to claim 1 for soft board, which is characterized in that the drill bit apex face is formed with auxiliary knife face
Bit tip angle be 120~140 °.
4. the drill bit according to claim 1 for soft board, which is characterized in that two helical flute spirals of the drill bit
Angle is 30~40 °, and slot length is between 2.0~3.0mm.
5. the drill bit according to claim 1 for soft board, which is characterized in that the heat dissipation groove section is arc-shaped.
6. the drill bit according to claim 1 for soft board, which is characterized in that the length of the heat dissipation groove is between 0.05
~0.10mm is recessed depth between 0.005~0.020mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820582251.9U CN208303973U (en) | 2018-04-23 | 2018-04-23 | A kind of drill bit for soft board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820582251.9U CN208303973U (en) | 2018-04-23 | 2018-04-23 | A kind of drill bit for soft board |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208303973U true CN208303973U (en) | 2019-01-01 |
Family
ID=64714017
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820582251.9U Expired - Fee Related CN208303973U (en) | 2018-04-23 | 2018-04-23 | A kind of drill bit for soft board |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208303973U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110976942A (en) * | 2019-11-08 | 2020-04-10 | 生益电子股份有限公司 | Back drilling cutter for PCB micropore back drilling |
-
2018
- 2018-04-23 CN CN201820582251.9U patent/CN208303973U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110976942A (en) * | 2019-11-08 | 2020-04-10 | 生益电子股份有限公司 | Back drilling cutter for PCB micropore back drilling |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190101 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |