CN207787797U - A kind of PCB microbits - Google Patents
A kind of PCB microbits Download PDFInfo
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- CN207787797U CN207787797U CN201721901426.XU CN201721901426U CN207787797U CN 207787797 U CN207787797 U CN 207787797U CN 201721901426 U CN201721901426 U CN 201721901426U CN 207787797 U CN207787797 U CN 207787797U
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Abstract
The utility model provides a kind of PCB microbits, it is characterised in that it includes multistage cutting edge and multiple first main flanks, main flank and cutting edge is corresponding and number is equal, from close apex point to separate apex point, the angle of main flank and drill bit central axes gradually decreases；Including chisel edge, flank corresponding with cutting edge, by being the first cutting edge to the n-th cutting edge according to this close to apex point, corresponding major first flank to the n-th flank, the chip space along drill body spiral is corresponding with cutting edge respectively.The utility model improves cutting edge cutting power by the structure design of more bit tip angles, reduces end cutting edge abrasion, improves bit life, so that the cutting power of end cutting edge is protected, fewer holes are thick.Chip discharge groove can be improved in rib band, improves chip removal ability.
Description
Technical field
The utility model belongs to PCB processing technique fields, and in particular to a kind of PCB microbits.
Background technology
With the development of electronics industry, printed circuit board micropore manufacturing process technology determines the integrated journey of electronic product
Degree.Nowadays, the manufacture of printed circuit board micropore is most using machine drilling mode, used in bit diameter it is general
All smaller, drill bit crash rate is also higher.The micro- brill material therefors of PCB are generally hard alloy, due to its bore diameter it is small, manufacturing cost with
The reduction of bit diameter and increase.The design that existing microbit mostly uses helicla flute carries out drilling cuttings discharge, drill bit end cutting edge portion
Point generally to hole wall without cutting movement, the brill dirt generated in boring procedure may be attached on due to squeezing on hole wall, secondly,
Cutter chip in rotary course can influence hole wall quality, influence the techniques such as follow-up copper facing.Its brill after microbit is processed
Sharp cutting edge abrasion is apparent, and the degree of wear is radially aggravated, the general side by grinding again of microbit abrasion of 0.2mm or more
Formula is continuing with, and 0.1mm microbits below are less to be ground again.The utility model drill bit can effectively improve micropore hole wall
Quality and chip removal effect reduce abrasion, increase bit life.
Utility model content
In view of this, to provide that a kind of processing Hole Wall Roughness is preferable, the service life is high, chip removal ability is good micro- for the utility model
Type drill bit PCB microbits, the utility model improve cutting edge cutting power by the structure design of more bit tip angles, reduce
End cutting edge is worn, and is improved bit life, so that the cutting power of end cutting edge is protected, fewer holes are thick.Row can be improved in rib band
It considers slot space to be worth doing, improves chip removal ability.
The technical solution of the utility model is：
A kind of PCB microbits, which is characterized in that including multistage cutting edge and multiple first main flanks, main flank
Corresponding and number is equal with cutting edge, and from close apex point to separate apex point, the angle of main flank and drill bit central axes gradually subtracts
It is few；Including chisel edge, flank corresponding with cutting edge, it is corresponding by being the first cutting edge to the n-th cutting edge according to this close to apex point
Major first flank to the n-th flank, the chip space along drill body spiral is corresponding with cutting edge respectively.
Further, cutting edge and end cutting edge are met at a bit from unbearable farthest last, it is farthest from apex point
Main flank and rib band intersect at a line, the rake face corresponding to the multistage cutting edge is in the same face, described to cut
It cuts sword length and reduces according to this by apex point and increase again.In the utility model, the first cutting edge undertakes more cutting function, most
Single order cutting edge undertakes secondary cutting function afterwards.
Further, the multi-tool edge corresponds to more drill point angles, and the corresponding drill point angle of cutting edge at the apex point is the
One drill point angle is followed successively by the second drill point angle to the n-th drill point angle backward, and drill point angle size reduces successively.It, can by this setting
So that the utility model is had compared with hyphen sword, axial force can be reduced.
Further, the drill bit is equipped with rib band, and the rib band is arranged along the end of apex point to cutting edge, it is possible to reduce with
The friction of hole wall improves and holds bits ability.
Further, the quantity of the same side main cutting edge is 2-5, and each cutting edge is in the projection of apex point, from brill
The nearest cutting edge of point accounts for total 2/3, and cutting edge length is first reduced to be increased again.
Further, it the drill point angle is by apex point, is sequentially reduced, is single order apex point close to drill bit part drill point angle
Angle, the single order drill point angle are 110 ° to 130 °, and each rank downward gradient is 20 ° to 60 °, has second order drill point angle to five rank apex points
Angle.
Further, the chisel edge accounts in apex point longitudinal projection and bores the 1/3 of diameter, has smaller chisel edge length, makes
Apex point enters to reduce the extrusion time of apex point when boring, and reduces axial force.
Further, the cutting edge is symmetrical relative to the vertex of apex point so that the stress of each cutting edge of apex point is equal
Weighing apparatus, in order to avoid cause the damage of drill bit.
The operation principle of the utility model is：
1. using more drill point angle structure designs, multistage cutting edge working rake angle is different, and effectively removing for cutting can be improved
Amount reduces Hole Wall Roughness.
2. main flank is arranged in stratum, be conducive to chip removal, reduction sticks, the bits caused by the cutting edge at apex point by
The main flank in the part flows away to the main flank of second-order, chip removal according to this, improves chip removal ability；
3. the corresponding main flank of the cutting edge farthest from apex point and drill body rib band connection increase drilling cuttings slot and hold bits ability.
Compared with prior art, the advantageous effects of the utility model are：
There are the processing microbit more drill point angles, printed circuit board can be dropped under the shear action of multistage cutting edge
Low hole wall is coarse, reduces the generation of glue residue.With smaller chisel edge, it is conducive to reduce drill thrust with rib band, it is big increases chip space
It is small, it improves and holds bits ability, be conducive to chip removal, mantle friction reduces, and reduces the friction with machined material and bit face, and reduction is cut
The generation of heat is cut, bit life is improved.
Description of the drawings
Fig. 1 is a kind of structural schematic diagram for the microbit apex point that embodiment provides of the utility model；
Fig. 2 is a kind of microbit overall structure figure that embodiment provides of the utility model；
Fig. 3 is a kind of microbit drill point angle structure chart that embodiment provides of the utility model；
Fig. 4 is a kind of microbit apex point vertical view that embodiment provides of the utility model；
Fig. 5 is a kind of microbit helicla flute schematic diagram that embodiment provides of the utility model；
Wherein, 1, apex point；2, chisel edge；3, major first flank；4, the first cutting edge；5, the second flank；6, the second cutting
Sword；7, third flank；8, third cutting edge；9, end cutting edge；10, rake face；11, chip pocket；12, rib band；13, cutting edge
Part；14, drillstock；15, chip space.
Specific implementation mode
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
The every other embodiment obtained, shall fall within the protection scope of the present invention.
Embodiment 1
A kind of PCB microbits, which is characterized in that including second order cutting edge and two the first main flanks, from close to brill
To far from apex point, the angle of main flank and drill bit central axes gradually decreases point 1；
Including chisel edge 2, flank corresponding with cutting edge, by being the first cutting edge 4, the second cutting edge according to this close to apex point
6, corresponding major first flank 3, the second flank 5, the chip space 15 along drill body spiral is corresponding with cutting edge respectively.
Further, it is met at a bit from unbearable farthest the second cutting edge and end cutting edge 9, the third master farthest from apex point
Flank and rib band 12 intersect at a line, and the rake face 11 corresponding to the second order cutting edge is in the same face, described to cut
It cuts sword length and reduces according to this by apex point and increase again.In the present invention, the first cutting edge undertakes more cutting function, and second cuts
It cuts sword and undertakes secondary cutting function.
Further, the three ranks cutting edge corresponds to more drill point angles, and the corresponding drill point angle of cutting edge at apex point is
First drill point angle is followed successively by the second drill point angle backward, and drill point angle size reduces successively.By this setting, tool of the present invention can be made
Have compared with hyphen sword, axial force can be reduced.
Further, the drill bit is equipped with rib band, and the rib band is arranged along the end of apex point to cutting edge, it is possible to reduce with
The friction of hole wall improves and holds bits ability, forms chip pocket 11.
Further, the quantity of the cutting edge is 2, and each cutting edge is nearest from apex point in the projection of apex point
Cutting edge accounts for total 2/3, and cutting edge length is first reduced to be increased again.
Further, it the drill point angle is by apex point, is sequentially reduced, is single order apex point close to drill bit part drill point angle
Angle, the single order drill point angle are 110 ° to 130 °, and each rank downward gradient is 20 ° to 60 °, has second order drill point angle.The present embodiment
In, second order cutting edge, respectively the first cutting edge 4, the second cutting edge 6 are opened, corresponding drill point angle is respectively α, β, range difference
It is 118 ° to 135 °, 60 ° to 80 °.
Further, the chisel edge accounts in apex point longitudinal projection and bores the 1/3 of diameter, has smaller chisel edge length, makes
Apex point enters to reduce the extrusion time of apex point when boring, and reduces axial force.
Further, the cutting edge is symmetrical relative to the vertex of apex point so that the stress of each cutting edge of apex point is equal
Weighing apparatus, in order to avoid cause the damage of drill bit.
Further, the PCB microbits further include drillstock 14.
The operation principle of the utility model is：
1. using second order drill point angle structure design, two sections of cutting edge working rake angles are different, and effectively removing for cutting can be improved
Amount reduces Hole Wall Roughness, adapts to the plank of more difficult drilling.
2. main flank is arranged in stratum, be conducive to chip removal, reduction sticks, the bits caused by the cutting edge at apex point by
The main flank in the part flows away to the main flank of second-order, chip removal according to this, improves chip removal ability；
3. the corresponding main flank of second-order cutting edge and drill body rib band connection increase drilling cuttings slot and hold bits ability.
Compared with prior art, advantageous effects of the invention are：
The processing microbit has second order drill point angle, and printed circuit board, can under the shear action of two sections of cutting edges
It is coarse to reduce hole wall, reduces the generation of glue residue.With smaller chisel edge, it is conducive to reduce drill thrust with rib band, increases chip space
Size improves and holds bits ability, is conducive to chip removal, and mantle friction reduces, and reduces the friction with machined material and bit face, reduces
The generation of cutting heat improves bit life.
Embodiment 2
A kind of PCB microbits, which is characterized in that including three rank cutting edges 13 and three the first main flanks, from close
Apex point 1 is arrived far from apex point, and the angle of main flank and drill bit central axes gradually decreases；
Including chisel edge 2, flank corresponding with cutting edge, by being the first cutting edge 4, the second cutting edge according to this close to apex point
6, third cutting edge 8, corresponding major first flank 3, the second flank 5, third flank 7, along the chip space 15 of drill body spiral
It is corresponding with cutting edge respectively.
Further, third cutting edge and end cutting edge 9 are met at a bit from unbearable farthest last, it is farthest from apex point
The main flank of third and rib band 12 intersect at a line, the rake face 11 corresponding to the three ranks cutting edge be in it is same
Face, the cutting edge length reduces according to this by apex point to be increased again.In the utility model, the first cutting edge undertakes more cut
Function is cut, third cutting edge undertakes secondary cutting function.
Further, the three ranks cutting edge corresponds to more drill point angles, and the corresponding drill point angle of cutting edge at apex point is
First drill point angle is followed successively by the second drill point angle to third drill point angle backward, and drill point angle size reduces successively.It is arranged by this,
The utility model can be made to have compared with hyphen sword, axial force can be reduced.
Further, the drill bit is equipped with rib band, and the rib band is arranged along the end of apex point to cutting edge, it is possible to reduce with
The friction of hole wall improves and holds bits ability, forms chip pocket 11.
Further, the quantity of the cutting edge is 3, and each cutting edge is nearest from apex point in the projection of apex point
Cutting edge accounts for total 2/3, and cutting edge length is first reduced to be increased again.
Further, it the drill point angle is by apex point, is sequentially reduced, is single order apex point close to drill bit part drill point angle
Angle, the single order drill point angle are 110 ° to 130 °, and each rank downward gradient is 20 ° to 60 °, has three rank drill point angles.The present embodiment
In, three rank cutting edges, respectively the first cutting edge 4, the second cutting edge 6, third cutting edge 8 are opened, corresponding drill point angle is respectively
α, β and θ, respectively 120 °, 80 ° and 20 °.
Further, the chisel edge accounts in apex point longitudinal projection and bores the 1/3 of diameter, has smaller chisel edge length, makes
Apex point enters to reduce the extrusion time of apex point when boring, and reduces axial force.
Further, the cutting edge is symmetrical relative to the vertex of apex point so that the stress of each cutting edge of apex point is equal
Weighing apparatus, in order to avoid cause the damage of drill bit.
Further, the PCB microbits further include drillstock 14.
The operation principle of the utility model is：
1. using more drill point angle structure designs, multistage cutting edge working rake angle is different, and effectively removing for cutting can be improved
Amount reduces Hole Wall Roughness.
2. main flank is arranged in stratum, be conducive to chip removal, reduction sticks, the bits caused by the cutting edge at apex point by
The main flank in the part flows away to the main flank of second-order, chip removal according to this, improves chip removal ability；
3. the corresponding main flank of the cutting edge farthest from apex point and drill body rib band connection increase drilling cuttings slot and hold bits ability.
Compared with prior art, the advantageous effects of the utility model are：
There are the processing microbit more drill point angles, printed circuit board can be dropped under the shear action of multistage cutting edge
Low hole wall is coarse, reduces the generation of glue residue.With smaller chisel edge, it is conducive to reduce drill thrust with rib band, it is big increases chip space
It is small, it improves and holds bits ability, be conducive to chip removal, mantle friction reduces, and reduces the friction with machined material and bit face, and reduction is cut
The generation of heat is cut, bit life is improved.
Embodiment 3
A kind of PCB microbits, which is characterized in that including quadravalence cutting edge and four the first main flanks, main flank
Corresponding and number is equal with cutting edge, and from close apex point to separate apex point, the angle of main flank and drill bit central axes gradually subtracts
It is few；
Including chisel edge, flank corresponding with cutting edge, by close to apex point according to this be the first cutting edge to the 4th cutting edge,
For corresponding major first flank to the 4th flank, the chip space along drill body spiral is corresponding with cutting edge respectively.
Further, cutting edge and end cutting edge are met at a bit from unbearable farthest last, it is farthest from apex point
Main flank and rib band intersect at a line, the rake face corresponding to the multistage cutting edge is in the same face, described to cut
It cuts sword length and reduces according to this by apex point and increase again.In the utility model, the first cutting edge undertakes more cutting function, most
Single order cutting edge undertakes secondary cutting function afterwards.
Further, the multi-tool edge corresponds to more drill point angles, and the corresponding drill point angle of cutting edge at the apex point is the
One drill point angle is followed successively by the second drill point angle to the 4th drill point angle backward, and drill point angle size reduces successively.It, can by this setting
So that the utility model is had compared with hyphen sword, axial force can be reduced.
Further, the drill bit is equipped with rib band, and the rib band is arranged along the end of apex point to cutting edge, it is possible to reduce with
The friction of hole wall improves and holds bits ability.
Further, the quantity of the cutting edge is 4, and each cutting edge is nearest from apex point in the projection of apex point
Cutting edge accounts for total 2/3, and cutting edge length is first reduced to be increased again.
Further, it the drill point angle is by apex point, is sequentially reduced, is single order apex point close to drill bit part drill point angle
Angle, the single order drill point angle are 110 ° to 130 °, and each rank downward gradient is 20 ° to 60 °, has quadravalence drill point angle.The present embodiment
In, open quadravalence cutting edge, respectively the first cutting edge, the second cutting edge, third cutting edge, the 4th cutting edge, corresponding apex point
Angle is respectively α, β, θ, γ, respectively 120 °, 80 °, 60 °, 20 °.
Further, the chisel edge accounts in apex point longitudinal projection and bores the 1/3 of diameter, has smaller chisel edge length, makes
Apex point enters to reduce the extrusion time of apex point when boring, and reduces axial force.
Further, the cutting edge is symmetrical relative to the vertex of apex point so that the stress of each cutting edge of apex point is equal
Weighing apparatus, in order to avoid cause the damage of drill bit.
Embodiment 4
A kind of PCB microbits, which is characterized in that including five rank cutting edges and five the first main flanks, main flank
Corresponding and number is equal with cutting edge, and from close apex point to separate apex point, the angle of main flank and drill bit central axes gradually subtracts
It is few；
Including chisel edge, flank corresponding with cutting edge, by close to apex point according to this be the first cutting edge to the 5th cutting edge,
For corresponding major first flank to the 5th flank, the chip space along drill body spiral is corresponding with cutting edge respectively.
Further, cutting edge and end cutting edge are met at a bit from unbearable farthest last, it is farthest from apex point
Main flank and rib band intersect at a line, the rake face corresponding to the multistage cutting edge is in the same face, described to cut
It cuts sword length and reduces according to this by apex point and increase again.In the utility model, the first cutting edge undertakes more cutting function, most
Single order cutting edge undertakes secondary cutting function afterwards.
Further, the multi-tool edge corresponds to more drill point angles, and the corresponding drill point angle of cutting edge at the apex point is the
One drill point angle is followed successively by the second drill point angle to the 5th drill point angle backward, and drill point angle size reduces successively.It, can by this setting
So that the utility model is had compared with hyphen sword, axial force can be reduced.
Further, the drill bit is equipped with rib band, and the rib band is arranged along the end of apex point to cutting edge, it is possible to reduce with
The friction of hole wall improves and holds bits ability.
Further, the quantity of the cutting edge is 5, and each cutting edge is nearest from apex point in the projection of apex point
Cutting edge accounts for total 2/3, and cutting edge length is first reduced to be increased again.
Further, it the drill point angle is by apex point, is sequentially reduced, is single order apex point close to drill bit part drill point angle
Angle, the single order drill point angle are 110 ° to 130 °, and each rank downward gradient is 20 ° to 60 °, has five rank drill point angles.The present embodiment
In, open five rank cutting edges, respectively the first cutting edge, the second cutting edge, third cutting edge, the 4th cutting edge, the 5th cutting edge,
Corresponding drill point angle is respectively α, β, θ, γ, δ, respectively 120 °, 100 °, 80 °, 40 °, 20 °.
Further, the chisel edge accounts in apex point longitudinal projection and bores the 1/3 of diameter, has smaller chisel edge length, makes
Apex point enters to reduce the extrusion time of apex point when boring, and reduces axial force.
Further, the cutting edge is symmetrical relative to the vertex of apex point so that the stress of each cutting edge of apex point is equal
Weighing apparatus, in order to avoid cause the damage of drill bit.
It is obvious to a person skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and
And without departing substantially from the spirit or essential attributes of the utility model, it can realize that this practicality is new in other specific forms
Type.Therefore, in all respects, the present embodiments are to be considered as illustrative and not restrictive, this practicality is new
The range of type is indicated by the appended claims rather than the foregoing description, it is intended that containing in the equivalent requirements of the claims will be fallen
All changes in justice and range are embraced therein.Any reference numeral in claim should not be considered as limitation
Involved claim.
In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped
Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should
It considers the specification as a whole, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
The other embodiment being appreciated that.It is noted that the technical characteristic not being described in detail in the utility model, can lead to
Cross any prior art realization.
Claims (8)
1. a kind of PCB microbits, which is characterized in that including multistage cutting edge and multiple first main flanks, main flank and
Cutting edge is corresponding and number is equal, and from close apex point to separate apex point, the angle of main flank and drill bit central axes gradually decreases；
Including chisel edge, flank corresponding with cutting edge, by close to apex point according to this be the first cutting edge to the n-th cutting edge, it is right
For the major first flank answered to the n-th flank, the chip space along drill body spiral is corresponding with cutting edge respectively.
2. PCB microbits according to claim 1, which is characterized in that from unbearable farthest last to the cutting
Sword and end cutting edge are met at a bit, and the main flank farthest from apex point and rib band intersect at a line, the multistage cutting edge institute
Corresponding rake face is in the same face, and the cutting edge length reduces according to this by apex point to be increased again.
3. PCB microbits according to claim 2, which is characterized in that the multi-tool edge corresponds to more drill point angles, close
The corresponding drill point angle of cutting edge at apex point is the first drill point angle, is followed successively by the second drill point angle to the n-th drill point angle backward, and bore
Wedge angle size reduces successively.
4. PCB microbits according to claim 3, which is characterized in that the drill bit is equipped with rib band, and the rib band is along brill
Point to the end of cutting edge is arranged.
5. PCB microbits according to claim 4, which is characterized in that the quantity of the cutting edge is 3-5, is respectively cut
Sword is cut in the projection of apex point, the cutting edge nearest from apex point accounts for total 2/3, and cutting edge length is first reduced to be increased again.
6. PCB microbits according to claim 5, which is characterized in that the drill point angle is by apex point, subtract successively
It is small, it is single order drill point angle close to drill bit part drill point angle, the single order drill point angle is 110 ° to 130 °, and each rank downward gradient is
20 ° to 60 °, have second order drill point angle to five rank drill point angles.
7. PCB microbits according to claim 6, which is characterized in that the chisel edge is accounted in apex point longitudinal projection
Bore the 1/3 of diameter.
8. PCB microbits according to claim 1, which is characterized in that vertex pair of the cutting edge relative to apex point
Claim.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721901426.XU CN207787797U (en) | 2017-12-29 | 2017-12-29 | A kind of PCB microbits |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721901426.XU CN207787797U (en) | 2017-12-29 | 2017-12-29 | A kind of PCB microbits |
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| Publication Number | Publication Date |
|---|---|
| CN207787797U true CN207787797U (en) | 2018-08-31 |
Family
ID=63279735
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721901426.XU Active CN207787797U (en) | 2017-12-29 | 2017-12-29 | A kind of PCB microbits |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108057918A (en) * | 2017-12-29 | 2018-05-22 | 广东工业大学 | A kind of PCB microbits |
| CN110757601A (en) * | 2019-11-06 | 2020-02-07 | 湖北鑫运祥科技发展有限公司 | V-shaped diamond shank milling cutter and manufacturing method thereof |
-
2017
- 2017-12-29 CN CN201721901426.XU patent/CN207787797U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108057918A (en) * | 2017-12-29 | 2018-05-22 | 广东工业大学 | A kind of PCB microbits |
| CN108057918B (en) * | 2017-12-29 | 2024-05-24 | 广东工业大学 | PCB miniature drill bit |
| CN110757601A (en) * | 2019-11-06 | 2020-02-07 | 湖北鑫运祥科技发展有限公司 | V-shaped diamond shank milling cutter and manufacturing method thereof |
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