CN108526551A - A kind of drill bit used for printed circuit board - Google Patents
A kind of drill bit used for printed circuit board Download PDFInfo
- Publication number
- CN108526551A CN108526551A CN201810416091.5A CN201810416091A CN108526551A CN 108526551 A CN108526551 A CN 108526551A CN 201810416091 A CN201810416091 A CN 201810416091A CN 108526551 A CN108526551 A CN 108526551A
- Authority
- CN
- China
- Prior art keywords
- chip
- drill bit
- cutting edge
- circuit board
- printed circuit
- 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.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B51/00—Tools for drilling machines
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2251/00—Details of tools for drilling machines
- B23B2251/48—Chip breakers
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Drilling Tools (AREA)
Abstract
The invention belongs to cut drill technical fields, more particularly to a kind of drill bit used for printed circuit board, including cutter body and the handle of a knife for being connected to the cutter body rear end, the cutter body is provided with cutting edge, helicla flute and chip-breaker, the knife face of the cutting edge is set as arc-shaped, the central axes of the helicla flute and the cutter body form helical angle, and the chip-breaker is opened on the cutting edge and on the helicla flute, the angle of the cutting edge busbar is apex point apex angle.Compared with the prior art, the present invention solves major diameter（3.2‑7.0mm）For drill bit under conditions of high speed, high feeding, the chip removal after drilling twines a phenomenon, to improve drilling processing quality and drilling life of bit.
Description
Technical field
The invention belongs to cut drill technical field more particularly to a kind of drill bits used for printed circuit board.
Background technology
Printed circuit board is generally used in electronic equipment, is the material with anisotropism and each anisotropy, therefore, is being bored
During cutting, because of material difference, the apparent diversity of cutting scheme difference of drill bit.It is fibre strength based on printed circuit board, close
The factors such as degree, net texture direction, metallic conductor thickness and medium thickness influence and caused by, thus to boring in drilling technique
The requirement of head cutting ability just has diversity.
In addition, drill bit cannot carry out liquid coolant in boring procedure, therefore cause the cutting force in drilling process excessive,
Temperature drift, chip removal are difficult so that Integrated Chip stops, therefore easily occurs hole when conventional major diameter bit bore slightly and to twine silk existing
As so as to cause drilling quality difference and the normal service life of influence cutter, bringing the inconvenience in many productions.
In view of this, it is necessory to provide a kind of drill bit used for printed circuit board to solve the problems, such as that hole slightly twines thread with long bits.
Invention content
It is an object of the invention to：In view of the deficiencies of the prior art, a kind of drill bit used for printed circuit board is provided, to solve
Major diameter（3.2-7.0mm）For drill bit under conditions of high speed, high feeding, the chip removal after drilling twines a phenomenon, is bored to improve
Hole machined quality and drilling life of bit.
To achieve the goals above, the present invention uses following technical scheme：
A kind of drill bit used for printed circuit board, including cutter body and the handle of a knife for being connected to the cutter body rear end, the cutting
Main body is provided with cutting edge, helicla flute and chip-breaker, and the knife face of the cutting edge is set as arc-shaped, the helicla flute with it is described
The central axes of cutter body form helical angle, and the chip-breaker is opened on the cutting edge and on the helicla flute, institute
The angle for stating cutting edge busbar is apex point apex angle.
It should be noted that in drilling process, when chip cannot effectively fracture and smoothly be discharged, chip will be blocked in
In chip space, continuously flow chip in this way will be easy to be wrapped on drill bit, therefore damage finished work surface.This
Invention has carried out opening up chip-breaker design on the cutting edge, and chip-breaker is equipped with along helicla flute, it cuts drill bit
It cuts performance and the service life has no adverse effects.By opening up asymmetric chip-breaker on the cutting edge, chip can be made to be flowed out from cutting edge
When voluntarily fracture when encountering the chip-breaker on helicla flute, reach chip breaking effect.But the chip discharge groove of drill bit is limited, therefore
The shape need that fractures to chip is also very for strictly.And cutting edge is designed as arc-shaped and has opened up chip breaking by the present invention
Slot, the chip under the cutting of arc edge of such workpiece is in a degree of bending, and chip that is curved and turning round is flowed out on cutting edge
When be deformed, segment spiral shell volume is broken into when encountering chip-breaker and rolls up more real so that chip removal is more smoothly, is not easy to be formed and twines silk
Phenomenon.
As a kind of improvement of drill bit used for printed circuit board of the present invention, the radius of corner of the cutting edge is 2 ~
The depth of 5mm, the cutting edge are 0.1 ~ 0.8mm.
As a kind of improvement of drill bit used for printed circuit board of the present invention, at least offered on each cutting edge
One chip-breaker, the chip-breaker are set as spiral shape, the asymmetric setting of chip-breaker.
As a kind of improvement of drill bit used for printed circuit board of the present invention, the depth of the chip-breaker is 0.1 ~ 1.5
The width of mm, the chip-breaker are 0.1 ~ 3 mm, and the length of the chip-breaker is 1 ~ 8 mm.
As a kind of improvement of drill bit used for printed circuit board of the present invention, the angular dimension of the helical angle is 15 ° ~
35°.When helical angle is excessive, can cause not having rational chip removal effect；When helical angle is too small, chip removal can be caused unsmooth,
It is easy to twine silk.
As a kind of improvement of drill bit used for printed circuit board of the present invention, the angular dimension of the apex point apex angle is
130°~175°.When bit tip angle is excessive, cutting sharpness can be caused inadequate, blade is also easy to produce notch；When bit tip angle is too small
When, the chip generated can be caused thicker, be not easy to chip breaking.
As a kind of improvement of drill bit used for printed circuit board of the present invention, the cutting portion cutter body and the knife
Handle connection is provided in round on one side, and the basal diameter of the cutter body is 2 ~ 8mm.
As a kind of improvement of drill bit used for printed circuit board of the present invention, the length of the cutter body is 80 ~
150mm。
As a kind of improvement of drill bit used for printed circuit board of the present invention, the handle of a knife is cylinder type, the knife
The length of handle is 20 ~ 30mm, a diameter of 3 ~ 4mm of the handle of a knife.
The beneficial effects of the present invention are：The present invention provides a kind of drill bit used for printed circuit board, including cutter body and company
It is connected to the handle of a knife of the cutter body rear end, the cutter body is provided with cutting edge, helicla flute and chip-breaker, the cutting edge
Knife face be set as arc-shaped, the central axes of the helicla flute and the cutter body form helical angle, and the chip-breaker opens up
In on the cutting edge and on the helicla flute, the angle of the cutting edge busbar is apex point apex angle.Compared to existing skill
Art, the present invention solve major diameter（3.2-7.0mm）For drill bit under conditions of high speed, high feeding, the chip removal after drilling twines silk
Phenomenon, to improve drilling processing quality and drilling life of bit.
Description of the drawings
Fig. 1 is one of the structural schematic diagram of the present invention.
Fig. 2 is the second structural representation of the present invention.
Wherein：1- cutter bodies, 2- handle of a knifes, 3- cutting edges, 4- helicla flutes, 5- chip-breakers, alpha-helix angle, β-apex point top
Angle.
Specific implementation mode
With reference to embodiment and Figure of description, the present invention is described in further detail, but the present invention
Embodiment be not limited to this.
As shown in Figure 1 and 2, a kind of drill bit used for printed circuit board, including cutter body 1 and it is connected to 1 rear end of cutter body
Handle of a knife 2, cutter body 1 are provided with cutting edge 3, helicla flute 4 and chip-breaker 5, and the knife face of cutting edge 3 is set as arc-shaped, spiral
The central axes of slot 4 and cutter body 1 form pitch angle alpha, and chip-breaker 5 is opened on cutting edge 3 and on helicla flute 4, cutting
The angle of 3 busbar of sword is apex point apex angle ss.
Further, the radius of corner of cutting edge 3 is 2 ~ 5mm, and the depth of cutting edge 3 is 0.1 ~ 0.8mm.
Further, a chip-breaker 5 is at least offered on each cutting edge 3, chip-breaker 5 is set as spiral shape, chip breaking
5 asymmetric setting of slot.
Further, the depth of chip-breaker 5 is 0.1 ~ 1.5 mm, and the width of chip-breaker 5 is 0.1 ~ 3 mm, chip-breaker 5
Length is 1 ~ 8 mm.
Further, the angular dimension of pitch angle alpha is 15 ° ~ 35 °.
Further, the angular dimension of apex point apex angle ss is 130 ° ~ 175 °.
Further, what cutting portion cutter body 1 was connect with handle of a knife 2 is provided in round on one side, and the bottom surface of cutter body 1 is straight
Diameter is 2 ~ 8mm.
Further, the length of cutting portion cutter body 1 is 80 ~ 150mm.
Further, handle of a knife 2 is cylinder type, and the length of handle of a knife 2 is 20 ~ 30mm, a diameter of 3 ~ 4mm of handle of a knife 2.
According to the disclosure and teachings of the above specification, those skilled in the art in the invention can also be to above-mentioned embodiment party
Formula is changed and is changed.Therefore, the invention is not limited in above-mentioned specific implementation mode, every those skilled in the art exist
Made any conspicuously improved, replacement or modification all belongs to the scope of protection of the present invention on the basis of the present invention.This
Outside, although having used some specific terms in this specification, these terms are merely for convenience of description, not to the present invention
Constitute any restrictions.
Claims (9)
1. a kind of drill bit used for printed circuit board, including cutter body and the handle of a knife for being connected to the cutter body rear end, feature
It is：The cutter body is provided with cutting edge, helicla flute and chip-breaker, and the knife face of the cutting edge is set as arc-shaped, institute
The central axes for stating helicla flute and the cutter body form helical angle, and the chip-breaker is opened on the cutting edge and is located at institute
It states on helicla flute, the angle of the cutting edge busbar is apex point apex angle.
2. drill bit used for printed circuit board according to claim 1, it is characterised in that：The radius of corner of the cutting edge be 2 ~
The depth of 5mm, the cutting edge are 0.1 ~ 0.8mm.
3. drill bit used for printed circuit board according to claim 1, it is characterised in that：It is at least opened up on each cutting edge
There are one the chip-breaker, the chip-breaker is set as spiral shape, the asymmetric setting of chip-breaker.
4. drill bit used for printed circuit board according to claim 1, it is characterised in that：The depth of the chip-breaker be 0.1 ~
The width of 1.5 mm, the chip-breaker are 0.1 ~ 3 mm, and the length of the chip-breaker is 1 ~ 8 mm.
5. drill bit used for printed circuit board according to claim 1, it is characterised in that：The angular dimension of the helical angle is
15°~35°。
6. drill bit used for printed circuit board according to claim 1, it is characterised in that：The angular dimension of the apex point apex angle is
130°~175°。
7. drill bit used for printed circuit board according to claim 1, it is characterised in that：The cutter body connects with the handle of a knife
What is connect is provided in round on one side, and the basal diameter of the cutter body is 2 ~ 8mm.
8. drill bit used for printed circuit board according to claim 1, it is characterised in that：The length of the cutter body be 80 ~
150mm。
9. drill bit used for printed circuit board according to claim 1, it is characterised in that：The handle of a knife is cylinder type, described
The length of handle of a knife is 20 ~ 30mm, a diameter of 3 ~ 4mm of the handle of a knife.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810416091.5A CN108526551A (en) | 2018-05-03 | 2018-05-03 | A kind of drill bit used for printed circuit board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810416091.5A CN108526551A (en) | 2018-05-03 | 2018-05-03 | A kind of drill bit used for printed circuit board |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108526551A true CN108526551A (en) | 2018-09-14 |
Family
ID=63475888
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810416091.5A Pending CN108526551A (en) | 2018-05-03 | 2018-05-03 | A kind of drill bit used for printed circuit board |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108526551A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110695419A (en) * | 2019-10-22 | 2020-01-17 | 成都欧珀琅精密工具有限公司 | Ring reamer for removing iron |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201079854Y (en) * | 2007-09-28 | 2008-07-02 | 上海惠而顺精密工具有限公司 | Integral hard alloy printing circuit board drill |
| JP2010012552A (en) * | 2008-07-03 | 2010-01-21 | Mitsubishi Materials Corp | Cemented carbide-made miniature drill excellent in breaking resistance |
| CN201534235U (en) * | 2009-08-07 | 2010-07-28 | 上海惠而顺精密工具有限公司 | Integral hard-alloy printed circuit board drill |
| CN202147039U (en) * | 2011-05-04 | 2012-02-22 | 超美精密工业（惠州）有限公司 | RDC (remote data control) chip-breaking knife |
| CN204504336U (en) * | 2015-03-13 | 2015-07-29 | 华伟纳精密工具（昆山）有限公司 | The shaping against shock milling cutter of pcb board |
| CN204893047U (en) * | 2015-07-15 | 2015-12-23 | 尖点科技股份有限公司 | Drill point chip breaking structure for circuit board |
| CN205043220U (en) * | 2015-08-17 | 2016-02-24 | 慧联（新乡）电子科技有限公司 | Chip -breaker wammel |
-
2018
- 2018-05-03 CN CN201810416091.5A patent/CN108526551A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201079854Y (en) * | 2007-09-28 | 2008-07-02 | 上海惠而顺精密工具有限公司 | Integral hard alloy printing circuit board drill |
| JP2010012552A (en) * | 2008-07-03 | 2010-01-21 | Mitsubishi Materials Corp | Cemented carbide-made miniature drill excellent in breaking resistance |
| CN201534235U (en) * | 2009-08-07 | 2010-07-28 | 上海惠而顺精密工具有限公司 | Integral hard-alloy printed circuit board drill |
| CN202147039U (en) * | 2011-05-04 | 2012-02-22 | 超美精密工业（惠州）有限公司 | RDC (remote data control) chip-breaking knife |
| CN204504336U (en) * | 2015-03-13 | 2015-07-29 | 华伟纳精密工具（昆山）有限公司 | The shaping against shock milling cutter of pcb board |
| CN204893047U (en) * | 2015-07-15 | 2015-12-23 | 尖点科技股份有限公司 | Drill point chip breaking structure for circuit board |
| CN205043220U (en) * | 2015-08-17 | 2016-02-24 | 慧联（新乡）电子科技有限公司 | Chip -breaker wammel |
Non-Patent Citations (1)
| Title |
|---|
| 刘献礼主编: "《数控刀具选用指南》", 30 April 2014, 机械工业出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110695419A (en) * | 2019-10-22 | 2020-01-17 | 成都欧珀琅精密工具有限公司 | Ring reamer for removing iron |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180914 |