CN109746488A - PCB micro-structure microbit - Google Patents
PCB micro-structure microbit Download PDFInfo
- Publication number
- CN109746488A CN109746488A CN201711061148.6A CN201711061148A CN109746488A CN 109746488 A CN109746488 A CN 109746488A CN 201711061148 A CN201711061148 A CN 201711061148A CN 109746488 A CN109746488 A CN 109746488A
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- Prior art keywords
- groove
- drill bit
- micro
- microbit
- cutting edge
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- 238000003754 machining Methods 0.000 claims description 8
- 239000000956 alloy Substances 0.000 claims description 5
- 229910045601 alloy Inorganic materials 0.000 claims description 5
- 239000000463 material Substances 0.000 description 14
- 238000005553 drilling Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 238000005299 abrasion Methods 0.000 description 5
- 239000002173 cutting fluid Substances 0.000 description 5
- 241001074085 Scophthalmus aquosus Species 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 206010017389 Frotteurism Diseases 0.000 description 1
- 230000000181 anti-adherent effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000013212 metal-organic material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 235000001968 nicotinic acid Nutrition 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
Landscapes
- Drilling Tools (AREA)
Abstract
The present invention relates to a kind of PCB micro-structure microbits, it is provided with several micro-recesses on the surface of the drill bit, the micro-recesses include being set to the first groove of the rake face of the drill bit and/or the third groove of the inner surface of the second groove being set in the flank of the drill bit and/or the helicla flute for being set to the drill bit.The present invention has the characteristics that antiwear property is good, chip removal ability is strong, the service life is long, processing hole wall quality is good.
Description
Technical field
The present invention relates to the field PCB, especially a kind of PCB micro-structure microbit.
Background technique
Direction with printed circuit board towards high-precision, high density and high reliability is developed, and processes on printed circuit board
Aperture it is smaller and smaller, the number in hole is more and more, and distance between borehole is smaller and smaller, guarantees the microvia quality of high-quality to electronics system
The development for making industry is most important, while the requirement to the microbit for processing printed circuit board is also higher and higher.
During existing microbit drilling printed circuit board micropore, microbit and machined material and chip it
Between friction abrasion is directly contributed to microbit surface, in addition to this, also will cause the raising of drilling temperature, add tool wear
Speed, the low melting material fusing in circuit board, melt are bonded in influence microbit cutting ability on microbit, and there are also portions
Divide the chip of fusing to be discharged because being not easy, is easily jammed in helicla flute；Furthermore the material of fusing can be bonded in circuit board micropore hole wall
On, hole wall quality is reduced, the conducting of route between printed circuit board different layers is influenced.In Micro-pore Drilling, the chip of generation at
It is divided into metal material and organic material, often helically sector shape and bar-shape, is easily wrapped on microbit or in helicla flute
In result in blockage, cause microbit to fracture at work.During microbit drilling printed circuit board micropore described above
The shortcomings that not only shorten the service life of microbit, also reduce the hole wall quality of micropore.
Show to provide in the surface of solids by certain processing technology processing according to current tribology and bionics Study
There are the array of certain size and equally distributed micro- geometry, the i.e. micro- texture in surface, can improve between cutter and chip
Frotteurism, making its surface instead has better abrasion resistance.The micro- texture in surface is applied on tool surface, can reduce
Mantle friction inhibits the phenomenon that chip is bonded in tool surface, to slow down the abrasion of cutter, and can play the role of chip breaking, contracting
Short length of chip reduces the case where cutter fractures, and extends cutting-tool's used life.
Summary of the invention
Based on this, the present invention provides a kind of PCB micro-structure microbit, is provided on the surface of the drill bit several miniature
Groove, the micro-recesses include after being set to the first groove of the rake face of the drill bit and/or being set to the drill bit
The second groove on knife face and/or be set to the drill bit helicla flute inner surface third groove.
By processing micro-recesses on the surface of drill bit to form micro- texture, the drill bit with micro- texture can change brill
The stress distribution in head section, reduces the stress intensity of the drill bit part of drill bit；Meanwhile micro- texture reduces chip and draws in rake face
Cross generated frictional force, in this way, drill bit required power when cutting pcb board reduces, the stress on drill bit section also with
Reduction, the service life of drill bit can be extended.In addition, by bit face with laser machining out micro-recesses, it is miniature recessed
Cutting fluid can be accommodated in slot, chip can be prevented to be bonded in bit face, so that chip be made to generate secondary deformation, promote chip more
It is easily broken off, shortens the length of chip, so that too long chip be avoided to be wrapped on drill bit or be blocked in helicla flute, reduce and bore
The case where head fractures at work, to extend the service life of microbit.In addition, the micro-recesses of bit face can make to bore
Head can accommodate more cutting fluids, the further lubricity and heat-sinking capability for improving drill bit, to extend the use of microbit
Service life.
Preferably, the micro-recesses are rectangular recess or circular groove or arc groove.
Micro-recesses have certain plane geometric figure and groove depth, either rectangular recess or circular groove or arc
Groove drill bit surface formed micro- texture, can improve drill bit accommodate cutting fluid amount, and change bit bore when by
The case where to stress, to improve the performance of drill bit.
Preferably, first groove is rectangular recess, and the quantity of first groove is 7 and regular array, described
The angle of the main cutting edge of the length direction of first groove and the drill bit is 45 °, the master of first groove and the drill bit
The minimum distance of cutting edge is 0.041mm, the minimum distance of itself and the end cutting edge of the drill bit is 0.038mm, described first
The distance between groove is 0.038mm, and the length of first rectangular recess is 0.25mm, width 0.013mm, and depth is
0.006mm。
By processing the first groove on rake face, the heat exchange area of rake face and chip can be increased, to subtract
The degree that temperature rises when light drilling, to reduce in pcb board after low melting material fusing, melt is bonded in microbit
The case where chip with pcb board hole wall, and part fusing blocks the helicla flute on drill bit, thus extend the use longevity of drill bit
Life, improves the quality of borehole wall, and then ensure that the conduction property of wiring board between printed circuit board different layers.
Preferably, first groove is rectangular recess, and the quantity of first groove is 7 and regular array, described
The length direction of first groove is parallel with the main cutting edge of the drill bit, the main cutting edge of first groove and the drill bit
Minimum distance is 0.041mm, is 0.048mm with the minimum distance of the end cutting edge of the drill bit, between first groove
Between be divided into 0.038mm, the length of first rectangular recess is 0.25mm, width 0.013mm, depth 0.006mm.
Preferably, second groove is rectangular recess, and the quantity of second groove is 6 and regular array, described
The length direction of second groove is vertical with the main cutting edge of the drill bit, the main cutting edge of second groove and the drill bit
Minimum distance is 0.01mm, is 0.01mm with the minimum distance of the assisted machining sword of the drill bit, between second groove
Spacing be 0.075mm.
By processing the second groove in flank, it can make to accommodate more cutting fluids in flank, can significantly drop
Low cutting resistance and reduction wear of the tool flank, moreover it is possible to keep heat dissipation effect more preferable.
Further, second groove includes short groove that a length is 0.060mm and five length are 0.075mm
Long recess, the short groove be located in the flank of the drill bit close to the drill bit chisel edge one end.
The short groove of 0.060mm is located in flank close to one end that flank and chisel edge have a common boundary, flank and chisel edge
Intersection area is reduced, and needs to shorten the length of the second groove to adapt to the variation of flank area, retaining groove is with after
The distance on the boundary of knife face.
Preferably, the third groove is circular groove, and the third groove is in array distribution, the third groove and institute
It is 0.1mm that the minimum distance for stating the main cutting edge of drill bit, which is at a distance from 0.041mm, with the end cutting edge of the drill bit, described
The mutual spacing of third groove is 0.031mm, and the diameter of the third groove is 0.006mm, depth 0.006mm.
Third groove is processed by the inner surface in helicla flute, cutting fluid can be stored in third groove, also,
Third groove can prevent lubricating film to be destroyed, to improve the inner surface of helicla flute and the anti-adhesive of chip, avoid cutting
Bits are wrapped in helicla flute, the fracture of drill bit when causing machining.
Preferably, the drill bit is made of hard alloy.
Hard alloy has a series of excellent performances such as hardness is high, wear-resisting, intensity and toughness are preferable, heat-resisting, corrosion-resistant, energy
Reduce abrasion of the drill bit in processing.
Preferably, the drill bit is integrally formed structures.
Integrally formed structure is stronger, can further increase the intensity of drill bit.
Preferably, the micro-recesses are by laser machining.
Laser-beam divergence angle after focusing is minimum, has good directionality and high energy density, can reach subtly
Process the purpose of micro-recesses.Laser-beam divergence angle after focusing is minimum, when it is irradiated to bit face, superfine laser
Light beam can make drill bit material that fusing, vaporization occur in a very short period of time, while the pressure that material vaporized expanding generates will expand
Material dish out, thus achieve the purpose that take out material.Since laser is non-contact type processing, mechanical presses or machinery are not generated
Stress, will not surface direct friction to drill bit generate resistance, so the speed of laser processing is exceedingly fast, processing object is heated shadow
It is minimum to ring range, drill bit performance itself will not be had an impact.
The principle of the present invention, effect are further illustrated below with reference to above-mentioned technical proposal:
1. the microbit with micro- texture, the mantle friction of microbit and processed product reduces when drilling, alleviate micro-
Rub the abrasion directly contributed to microbit surface between type drill bit and machined material and chip；
2. the microbit with micro- texture, because of rake face and the increase of chip heat exchange area and microbit and processing material
Material and chip friction reduce, the degree that temperature rises when alleviating drilling, thus reduce in plate after low melting material fusing,
Melt is bonded in the case where microbit and printed board hole wall and the chip partially melted blocking helicla flute, thus extends
Microbit service life, improves hole wall quality, ensure that the conduction property of route between printed circuit board different layers；
3. the trench structure of micro- texture can inhibit chip to be bonded in tool surface, and chip can be made to generate second order buckling and become
Shape promotes chip fracture, shortens length of chip, effectively prevents too long chip and be wrapped on microbit or be blocked in spiral
In slot, the case where microbit fractures at work is reduced, microbit service life is extended.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of PCB micro-structure microbit described in the embodiment of the present invention；
Fig. 2 is the structural schematic diagram one of the first groove described in the embodiment of the present invention；
Fig. 3 is that the present invention implements the third groove partial structural diagram；
Fig. 4 is the partial structurtes enlarged diagram that the present invention implements the third groove；
Fig. 5 is the structural schematic diagram two of the first groove described in the embodiment of the present invention；
Fig. 6 is the structural schematic diagram of the second groove described in the embodiment of the present invention；
Description of symbols:
Flank 1, the second groove 11, long recess 111, short groove 112, helicla flute 2, rake face 21, the first groove 211, master cut
Cut sword 3, end cutting edge 4, assisted machining sword 5, chisel edge 6.
Specific embodiment
In order to facilitate the understanding of those skilled in the art, being done further in detail below in conjunction with attached drawing and embodiment to the present invention
Thin description:
Embodiment 1
A kind of PCB micro-structure microbit, the diameter of the drill bit are 1mm, are provided with first on the rake face 21 of the drill bit
Groove 211, first groove 211 are rectangular recess, and the quantity of first groove 211 is 7 and regular array, described the
The angle of the main cutting edge 3 of the length direction and drill bit of one groove 211 is 45 °, first groove 211 and the drill bit
Main cutting edge 3 minimum distance be 0.041mm, the minimum distance of itself and the end cutting edge 4 of the drill bit is 0.038mm, institute
Stating the distance between first groove 211 is 0.038mm, and the length of first rectangular recess is 0.25mm, width is
0.013mm, depth 0.006mm.
Embodiment 2
A kind of PCB micro-structure microbit, the material of the drill bit are hard alloy, and the diameter of the drill bit is 1mm, the brill
There is laser processing to have the first groove 211 on the rake face 21 of head, has the second groove with laser machining in the flank 1 of the drill bit
11, first groove 211 is rectangular recess, and the quantity of first groove 211 is 7 and regular array, and described first is recessed
The length direction of slot 211 is parallel with the main cutting edge 3 of the drill bit, the main cutting edge 3 of first groove 211 and the drill bit
Minimum distance be 0.041mm, be 0.048mm, first groove with the minimum distance of the end cutting edge 4 of the drill bit
It is divided into 0.038mm between 211, the length of first rectangular recess is 0.25mm, width 0.013mm, and depth is
0.006mm。
Second groove 11 is rectangular recess, and the quantity of second groove 11 is 6 and regular array, described second
The length direction of groove 11 is vertical with the main cutting edge 3 of the drill bit, the main cutting edge 3 of second groove 11 and the drill bit
Minimum distance be 0.01mm, be 0.01mm, second groove 11 with the minimum distance of the assisted machining sword 5 of the drill bit
Between spacing be 0.075mm.
The length that second groove 11 includes the short groove 112 that a length is 0.060mm and five length is 0.075mm
Groove 111, the short groove 112 are located at close to one end of the chisel edge 6 of the drill bit in the flank 1 of the drill bit, to adapt to
The variation of the shape of flank 1 and 6 intersection flank 1 of chisel edge.
Embodiment 3
A kind of PCB micro-structure microbit, the material of the drill bit are hard alloy, and the diameter of the drill bit is 1mm, the brill
There is third groove with laser processing on the inner surface of the helicla flute 2 of head, the third groove is circular groove, the third groove
In array distribution, the minimum distance of the main cutting edge 3 of the third groove and the drill bit is 0.041mm, with the drill bit
End cutting edge 4 distance be 0.1mm, the mutual spacing of the third groove be 0.031mm, the third groove it is straight
Diameter is 0.006mm, depth 0.006mm.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the invention
Range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (10)
1. a kind of PCB micro-structure microbit, which is characterized in that be provided with several micro-recesses, institute on the surface of the drill bit
Stating micro-recesses includes being set to the first groove of the rake face of the drill bit and/or being set in the flank of the drill bit
Second groove and/or be set to the drill bit helicla flute inner surface third groove.
2. PCB micro-structure microbit according to claim 1, which is characterized in that the micro-recesses are rectangular recess
Or circular groove or arc groove.
3. PCB micro-structure microbit according to claim 1, which is characterized in that first groove is rectangular recess,
The quantity of first groove is 7 and regular array, the main cutting edge of the length direction and the drill bit of first groove
Angle be 45 °, the minimum distance of the main cutting edge of first groove and the drill bit is 0.041mm, itself and the drill bit
The minimum distance of end cutting edge be 0.038mm, the distance between described first groove is 0.038mm, and first rectangle is recessed
The length of slot is 0.25mm, width 0.013mm, depth 0.006mm.
4. PCB micro-structure microbit according to claim 1, which is characterized in that first groove is rectangular recess,
The quantity of first groove is 7 and regular array, the main cutting edge of the length direction and the drill bit of first groove
In parallel, the minimum distance of the main cutting edge of first groove and the drill bit is 0.041mm, is cut with the pair of the drill bit
The minimum distance of sword is 0.048mm, between first groove between be divided into 0.038mm, the length of first rectangular recess
For 0.25mm, width 0.013mm, depth 0.006mm.
5. PCB micro-structure microbit according to claim 1, which is characterized in that second groove is rectangular recess,
The quantity of second groove is 6 and regular array, the main cutting edge of the length direction and the drill bit of second groove
Vertically, the minimum distance of the main cutting edge of second groove and the drill bit is 0.01mm, is cut with the auxiliary of the drill bit
The minimum distance for cutting sword is 0.01mm, and the spacing between second groove is 0.075mm.
6. PCB micro-structure microbit according to claim 5, which is characterized in that second groove includes one long
The long recess that the short groove and five length that degree is 0.060mm are 0.075mm, the short groove are located at the flank of the drill bit
One end of the upper chisel edge close to the drill bit.
7. PCB micro-structure microbit according to claim 1, which is characterized in that the third groove is circular groove,
The third groove is in array distribution, and the minimum distance of the main cutting edge of the third groove and the drill bit is 0.041mm,
Be 0.1mm at a distance from the end cutting edge of the drill bit, the mutual spacing of the third groove is 0.031mm, described the
The diameter of three grooves is 0.006mm, depth 0.006mm.
8. PCB micro-structure microbit according to claim 1, which is characterized in that the drill bit is made of hard alloy.
9. PCB micro-structure microbit according to claim 1, which is characterized in that the knot that the drill bit is integrally formed
Structure.
10. PCB micro-structure microbit according to claim 1, which is characterized in that the micro-recesses are by laser machining
It forms.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711061148.6A CN109746488A (en) | 2017-11-02 | 2017-11-02 | PCB micro-structure microbit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711061148.6A CN109746488A (en) | 2017-11-02 | 2017-11-02 | PCB micro-structure microbit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109746488A true CN109746488A (en) | 2019-05-14 |
Family
ID=66398257
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711061148.6A Pending CN109746488A (en) | 2017-11-02 | 2017-11-02 | PCB micro-structure microbit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109746488A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001239411A (en) * | 2000-02-28 | 2001-09-04 | Mitsubishi Materials Corp | Miniature drill made of micro powder organization pressurized/sintered body giving good breakage resistance and abrasion resistance in rapid drilling |
| CN201625801U (en) * | 2010-01-29 | 2010-11-10 | 深圳市金洲精工科技股份有限公司 | Micro-drill bit for circuit board drilling and special grinding wheel thereof |
| CN102189287A (en) * | 2011-04-11 | 2011-09-21 | 山东大学 | Micro-texture self-lubricating drilling bit and manufacturing method thereof |
| CN203401118U (en) * | 2013-07-30 | 2014-01-22 | 上海名古屋精密工具股份有限公司 | Drill bit used for performing hole machining on fiber composite material |
| CN207709953U (en) * | 2017-11-02 | 2018-08-10 | 广东工业大学 | PCB micro-structure microbits |
-
2017
- 2017-11-02 CN CN201711061148.6A patent/CN109746488A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001239411A (en) * | 2000-02-28 | 2001-09-04 | Mitsubishi Materials Corp | Miniature drill made of micro powder organization pressurized/sintered body giving good breakage resistance and abrasion resistance in rapid drilling |
| CN201625801U (en) * | 2010-01-29 | 2010-11-10 | 深圳市金洲精工科技股份有限公司 | Micro-drill bit for circuit board drilling and special grinding wheel thereof |
| CN102189287A (en) * | 2011-04-11 | 2011-09-21 | 山东大学 | Micro-texture self-lubricating drilling bit and manufacturing method thereof |
| CN203401118U (en) * | 2013-07-30 | 2014-01-22 | 上海名古屋精密工具股份有限公司 | Drill bit used for performing hole machining on fiber composite material |
| CN207709953U (en) * | 2017-11-02 | 2018-08-10 | 广东工业大学 | PCB micro-structure microbits |
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