CN203401120U - Drill bit structure - Google Patents
Drill bit structure Download PDFInfo
- Publication number
- CN203401120U CN203401120U CN201320488404.0U CN201320488404U CN203401120U CN 203401120 U CN203401120 U CN 203401120U CN 201320488404 U CN201320488404 U CN 201320488404U CN 203401120 U CN203401120 U CN 203401120U
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- equal
- blade
- drill bit
- spiral grooves
- section
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- 238000005520 cutting process Methods 0.000 claims description 18
- 241001074085 Scophthalmus aquosus Species 0.000 claims description 4
- 238000005553 drilling Methods 0.000 abstract description 6
- 238000013461 design Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 9
- 239000000463 material Substances 0.000 description 7
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 229910001220 stainless steel Inorganic materials 0.000 description 5
- 239000010935 stainless steel Substances 0.000 description 5
- 238000012545 processing Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 235000019994 cava Nutrition 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012958 reprocessing Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- -1 tungsten carbides Chemical class 0.000 description 1
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Abstract
A drill bit structure includes a blade section and a shank section connected in series to the blade section. The blade section has a drilling tip, a drilling root relative to the drilling tip, a long helical groove, and a short helical groove relative to the long helical groove. The long helical groove and the short helical groove extend from the drill tip toward the drill root about an axis of the blade section. A first rake face of the long spiral groove is straight in a cross section perpendicular to the axis, and a second rake face of the short spiral groove is curved in the cross section. The utility model discloses a drill bit structure, it not only has preferred intensity, also has preferred chip removal ability.
Description
Technical field
The utility model is about a kind of drill bit structure (drill structure), and particularly relevant for a kind of drill bit structure that is applicable to printed circuit board (PCB) (printed circuit board, PCB).
Background technology
Along with scientific and technological development, the wire on printed circuit board (PCB) is gradually towards high density and the development of high-precision line thinning.For in response to market for high-quality, the high demand of printed circuit board (PCB) and the high competition environment of fast supply, precision, intensity and the feed rate of the microbit that industry uses for printed circuit board drilling procedure for processing (micro drill), or even hole wall quality, wait the requirement of processing conditions also more and more higher.And; in practice, industry can be carried out identical Drilling operation processing procedure in the lump to the overlapped multi-disc printed circuit board (PCB) forming conventionally, to promote working (machining) efficiency and to reduce manufacturing cost; therefore the length of the bit using is longer, also must have enough intensity and chip removal ability.
At present comparatively common traditional microbit can have a pair of spiral grooves (helical flute) that is balanced configuration conventionally on the market.This can form at the apex point end (drill tip) of drill bit the blade (lip) of a pair of symmetry to spiral grooves, and can be around axle center brill root (drill end) extension towards drill bit by apex point end of drill bit, so that the scrap that blade cuts (cutting) discharges along spiral grooves.It should be noted that the design of double helix groove can reduce the intensity of microbit, and the design of single-screw groove can reduce the chip removal ability of microbit.Therefore, need badly to provide and not only there is better intensity, also there is a kind of Novel microbit of better chip removal ability.
Utility model content
In order to address the above problem, the utility model provides a kind of drill bit structure, and it not only has better intensity, also has better chip removal ability.
The utility model provides a kind of drill bit structure, the shank section (shank part) that it comprises a blade section (flute part) and is serially connected with blade section.Blade section has an apex point end, with respect to one of apex point end, bores root, long spiral grooves and with respect to a short spiral grooves of long spiral grooves.Wherein, long spiral grooves and short spiral grooves are extended towards boring root by apex point end around an axle center of blade section, and a major first face (flute surface) of long spiral grooves is a straight line on a cross section perpendicular to axle center, and one second rake face of short spiral grooves is a curve on cross section.
In an embodiment of the present utility model, above-mentioned apex point end has by an end points (tip end) in axle center and around first cutting face (front lip relief facet), first supporting surface (rear lip relief facet), second cutting face and second supporting surface of endpoint configurations.Major first face is adjacent to the first cutting face and the first supporting surface, to form first blade and second blade linearly, the second rake face is adjacent to the first supporting surface, the second cutting face and the second supporting surface, to form curved the 3rd blade, a four blade sword and the 5th blade.In a preferred embodiment, the 3rd blade and four blade sword can protrude towards short spiral grooves, and the 5th blade can be towards the second supporting surface depression.
In an embodiment of the present utility model, above-mentioned blade section and shank section are one-body molded, and its material is all tungsten carbide (tungsten carbide, chemical formula is WC).
In an embodiment of the present utility model, the depression (dent) that above-mentioned shank section has a link (connect end) and is formed at link, and boring root is embedded in depression to clamp-on inlaying process (wedge embedding), wherein the material of shank section is stainless steel (stainless steel), and the material of blade section is tungsten carbide.
In an embodiment of the present utility model, the external diameter of above-mentioned shank section is more than or equal to 1.95 millimeters, and is less than or equal to 2.05 millimeters, or is more than or equal to 3.15 millimeters, and is less than or equal to 3.20 millimeters.
In an embodiment of the present utility model, the external diameter of above-mentioned blade section is more than or equal to 0.05 millimeter, and be less than or equal to 3.00 millimeters in an embodiment of the present utility model, the length of above-mentioned blade section is more than or equal to 1.0 millimeters, and is less than or equal to 12.0 millimeters.
In an embodiment of the present utility model, the percentage that the length of above-mentioned long spiral grooves accounts for the length of blade section is more than or equal to 30%, and be less than or equal to 100%, the percentage that the length of above-mentioned short spiral grooves accounts for the length of blade section is more than or equal to 5%, and is less than or equal to 50%.
In an embodiment of the present utility model, the helical angle (helix angle) that above-mentioned long spiral grooves is accompanied by a part for short spiral grooves is more than or equal to 35 degree, and be less than or equal to 45 degree, a helical angle of remainder is more than or equal to 45 degree, and is less than or equal to 55 degree.
In an embodiment of the present utility model, a helical angle of above-mentioned short spiral grooves is more than or equal to 35 degree, and is less than or equal to 45 degree.
Based on above-mentioned, drill bit structure provided by the utility model, because the leading portion of blade section is double helix design, back segment designs for single-screw, therefore not only has better intensity, also has better chip removal ability.
Accompanying drawing explanation
Fig. 1 shows the side direction structural representation of a kind of drill bit structure of an embodiment of the utility model.
Fig. 2 shows the side direction structural representation of the blade section of the drill bit structure going out as Figure 1 illustrates in.
Fig. 3 shows the schematic diagram of the knife face structure of the drill bit structure going out as Figure 1 illustrates in.
Fig. 4 shows the side direction structural representation of a kind of drill bit structure of another embodiment of the utility model.
Fig. 5 shows the exploded view of the drill bit structure as shown in Fig. 2.
Main element label declaration:
10: drill bit structure
100: blade section
102: axle center
110: apex point end
112: straight cuts line
114: curvilinear cut line
120: bore root
130: long spiral grooves
132,142: rake face
140: short spiral grooves
200: shank section
210: link
220: depression
E1, E2, E3, E4, E5: blade
F1, F3: cutting face
F2, F4: supporting surface
T: end points
The specific embodiment
For technical characterictic of the present utility model, object and effect being had more clearly, understand, now contrast accompanying drawing the specific embodiment of the present utility model is described:
Fig. 1 shows the side direction structural representation of a kind of drill bit structure of an embodiment of the utility model.Moreover Fig. 2 shows the side direction structural representation of the blade section of the drill bit structure going out as Figure 1 illustrates in.In addition, Fig. 3 shows the schematic diagram of the knife face structure of the drill bit structure going out as Figure 1 illustrates in.In following embodiment, the similar elements symbol using in different embodiment is in order to refer to identical or similar element.And the orientation, upper and lower, left and right recorded is in this embodiment as the criterion with the orientation that Fig. 1 and Fig. 2 were shown.
Please refer to shown in Fig. 1, drill bit structure 10 of the present utility model is for example a kind of microbit that is applicable to printed circuit board drilling procedure for processing, and it is for example comprised of a blade section 100 and 200 of shank sections being serially connected with blade section 100.In this embodiment, blade section 100 is for example to make so that tungsten carbide material is one-body molded with shank section 200.Moreover the external diameter of blade section 100 is to be for example more than or equal to 0.05 millimeter, and be less than or equal to 3.00 millimeters, its length is to be for example more than or equal to 1.0 millimeters, and is less than or equal to 12.0 millimeters.In addition, the external diameter of shank section 200 is to be for example more than or equal to 1.95 millimeters, and is less than or equal to 2.05 millimeters, or is more than or equal to 3.15 millimeters, and is less than or equal to 3.20 millimeters.In addition, in a specific embodiment, the external diameter of blade section 100 preferably approximates 0.3 millimeter, and the external diameter of shank section 200 preferably approximates 2 millimeters or 3.175 millimeters.
Then, please refer to shown in Fig. 2 and Fig. 3, blade section 100 can have an apex point end 110, with respect to one of apex point end 110, bore root 120, long spiral grooves 130 and with respect to a short spiral grooves 140 of long spiral grooves 130.Long spiral grooves 130 is extended towards boring root 120 by apex point end 110 around an axle center 102 of blade section 100 with short spiral grooves 140, and on a cross section perpendicular to axle center 102 linearly, a rake face 142 of short spiral grooves 140 is curved on the cross section perpendicular to axle center 102 for a rake face 132 of long spiral grooves 130.
More specifically, as shown in Figure 2 and Figure 3, the apex point end 110 in this embodiment can have by an end points T in axle center 102 and two cutting face F1, F3 and two supporting surface F2, the F4 that configure around end points T.Rake face 132 is adjacent to cutting face F1 and supporting surface F2, and to form a blade E1 and a blade E2, rake face 142 is adjacent to supporting surface F2, cutting face F3 and supporting surface F4, to form a blade E3, a blade E4 and a blade E5.Wherein, blade E1, E2 can form straight line line of cut 112, rake face 132 is understood linearly on the cross section perpendicular to axle center 102, and blade E3, E4, E5 can form a curvilinear cut line 114, make rake face 142 meeting curve on the cross section perpendicular to axle center 102.And as shown in Figure 3, in a specific embodiment, blade E3, E4 protrude towards short spiral grooves 142, blade E5 caves in towards supporting surface F4.
In this embodiment, drill bit structure 10 has configured double helix groove being adjacent to apex point end 110 places (that is mainly in order to section of cutting), to maintain preferably chip removal ability, in other parts (that is main section in order to support), only configured single-screw groove, to maintain the intensity of blade section 100.Therefore, the drill bit structure 10 in this embodiment not only can be better than the intensity of microbit that is designed with traditionally double helix groove, also can be better than the chip removal ability of microbit that is only designed with traditionally single-screw groove.In this embodiment, the percentage that the length of long spiral grooves 130 accounts for the length of blade section 100 is more than or equal to 30% in this way, and is less than or equal to 100%, and is preferably more than or equal to 75%, and is less than or equal to 85%.In comparison, the percentage that the length of short spiral grooves 140 accounts for the length of blade section 100 is more than or equal to 5% in this way, and is less than or equal to 50%, and is preferably more than or equal to 15%, and is less than or equal to 25%.
In addition, the section that has configured double helix groove in order to allow maintains preferably chip removal ability, and allow the section that has only configured single-screw groove maintain preferably intensity, the long spiral grooves 130 that is positioned at double helix flute section is to be all for example more than or equal to 35 degree with the helical angle of short spiral grooves 140, and be less than or equal to 45 degree, the helical angle that is positioned at the long spiral grooves 130 of single-screw flute section is to be for example more than or equal to 45 degree, and is less than or equal to 55 degree.And, in a specific embodiment, being positioned at the long spiral grooves 130 of double helix flute section and the helical angle of short spiral grooves 140 is preferably all 40 degree, the helical angle that is positioned at the long spiral grooves 130 of single-screw flute section preferably 50 is spent.
In addition, traditionally, no matter be the drill bit structure of single-screw trench design or double helix trench design, the line of cut that is positioned at apex point end all can be designed to curve conventionally.In comparison, in the above-described embodiments, mainly in order to the long spiral grooves 130 of cutting, can form have the preferably straight cuts line 112 of cutting effect at apex point end 110 places, mainly the short spiral grooves 140 in order to chip removal can form the curvilinear cut line 114 with preferably chip removal effect at apex point end 110 places.Therefore,, compared to traditional drill bit structure, the drill bit structure 10 in this embodiment more can have preferably cutting power maintaining under the situation of certain chip removal effect.
Fig. 4 shows the side direction structural representation of a kind of drill bit structure of another embodiment of the utility model, and Fig. 5 shows the exploded view of the drill bit structure as shown in Fig. 2.Please refer to shown in Fig. 4 and Fig. 5, in simple terms, in last this embodiment, be integrated drill bit structure 10, the blade section 100 of the drill bit structure 10 in this embodiment and 200 of shank sections are for example to clamp-on inlaying process to engage and form.
More specifically, in this embodiment, blade section 100 is for example made with tungsten carbide material, and shank section 200 is such as being made with materials such as stainless steel or tungsten carbides, and a depression 220 that more can have a link 210 and be formed at link 210.And, the brill root 120 of blade section 100 can utilize clamp-on inlaying process be embedded in depression 220 in, to form drill bit structure 10.In other words, in this embodiment, shank section 200 more can be utilized the waste material (waste) of the process tools (tooling) such as wearing and tearing, bending or the drill bit (drillbit) rupturing, milling cutter (router bit) to reclaim reprocessing and form, or made with the stainless steel more cheap than tungsten carbide material, to reduce the manufacturing cost of drill bit structure 10.
Comprehensively above-mentioned, drill bit structure provided by the utility model, because the leading portion of blade section is double helix design, back segment designs for single-screw, therefore not only has better intensity, also has better chip removal ability.And when long spiral grooves forms straight cuts line at apex point end place, and short spiral grooves is while forming curvilinear cut line at apex point end place, drill bit structure more can have preferably cutting power maintaining under the situation of certain chip removal effect.In addition, when the blade section of drill bit structure engages to clamp-on inlaying process with shank section, more can utilize wearing and tearing, process tool waste material or stainless steel crooked or fracture to make shank section, to reduce the manufacturing cost of drill bit structure.
The foregoing is only the schematic specific embodiment of the utility model, not in order to limit scope of the present utility model.Any those skilled in the art, is not departing from equivalent variations and the modification of having done under the prerequisite of design of the present utility model and principle, all should belong to the scope of the utility model protection.
Claims (10)
1. a drill bit structure, is characterized in that, this drill bit structure comprises:
One blade section, there is an apex point end, with respect to one of this apex point end, bore root, a long spiral grooves and with respect to a short spiral grooves of this length spiral grooves, wherein this length spiral grooves and this short spiral grooves are extended towards this brill root by this apex point end around an axle center of this blade section, one major first face of this length spiral grooves is a straight line on the cross section perpendicular to this axle center, and one second rake face of this short spiral grooves is a curve on this cross section; And
One shank section, is serially connected with this blade section.
2. drill bit structure as claimed in claim 1, it is characterized in that, this apex point end has by an end points in this axle center and around one first cutting face, one first supporting surface, one second cutting face and one second supporting surface of this endpoint configurations, this major first face is adjacent to this first cutting face and this first supporting surface, to form one first blade and one second blade linearly, and this second rake face is adjacent to this first supporting surface, this second cutting face and this second supporting surface, to form curved one the 3rd blade, a four blade sword and one the 5th blade.
3. drill bit structure as claimed in claim 2, is characterized in that, the 3rd blade and this four blade sword protrude towards this short spiral grooves, and the 5th blade is towards this second supporting surface depression.
4. drill bit structure as claimed in claim 1, is characterized in that, this blade section and this shank section are one-body molded.
5. drill bit structure as claimed in claim 1, is characterized in that, the depression that this shank section has a link and is formed at this link, and this brill root is embedded in this depression.
6. drill bit structure as claimed in claim 1, is characterized in that, the external diameter of this shank section is more than or equal to 1.95 millimeters, and is less than or equal to 2.05 millimeters, or is more than or equal to 3.15 millimeters, and is less than or equal to 3.20 millimeters.
7. drill bit structure as claimed in claim 1, is characterized in that, the external diameter of this blade section is more than or equal to 0.05 millimeter, and is less than or equal to 3.00 millimeters, and the length of this blade section is more than or equal to 1.0 millimeters, and is less than or equal to 12.0 millimeters.
8. drill bit structure as claimed in claim 1, it is characterized in that, the percentage that the length of this length spiral grooves accounts for the length of this blade section is more than or equal to 30%, and be less than or equal to 100%, and the length of this short spiral grooves accounts for the percentage of this length of this blade section, be more than or equal to 5%, and be less than or equal to 50%.
9. drill bit structure as claimed in claim 1, it is characterized in that, the helical angle that this length spiral grooves is accompanied by a part for this short spiral grooves is more than or equal to 35 degree, and is less than or equal to 45 degree, and the helical angle of remainder is more than or equal to 45 degree, and be less than or equal to 55 degree.
10. drill bit structure as claimed in claim 1, is characterized in that, the helical angle of this short spiral grooves is more than or equal to 35 degree, and is less than or equal to 45 degree.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW102213329 | 2013-07-15 | ||
| TW102213329U TWM467521U (en) | 2013-07-15 | 2013-07-15 | Drill structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203401120U true CN203401120U (en) | 2014-01-22 |
Family
ID=49937063
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320488404.0U Expired - Lifetime CN203401120U (en) | 2013-07-15 | 2013-08-09 | Drill bit structure |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP3186747U (en) |
| CN (1) | CN203401120U (en) |
| TW (1) | TWM467521U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105312112A (en) * | 2014-07-14 | 2016-02-10 | 吴爱悯 | Detachable support rod with drill bit |
| CN105562788A (en) * | 2015-11-04 | 2016-05-11 | 深圳市金洲精工科技股份有限公司 | Drill bit for drilling PCB |
| CN107708601A (en) * | 2015-04-16 | 2018-02-16 | 登士柏希罗纳有限公司 | Cutting device, particularly dentistry cutting device |
Families Citing this family (1)
| 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 |
-
2013
- 2013-07-15 TW TW102213329U patent/TWM467521U/en not_active IP Right Cessation
- 2013-08-09 JP JP2013004628U patent/JP3186747U/en not_active Expired - Lifetime
- 2013-08-09 CN CN201320488404.0U patent/CN203401120U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105312112A (en) * | 2014-07-14 | 2016-02-10 | 吴爱悯 | Detachable support rod with drill bit |
| CN107708601A (en) * | 2015-04-16 | 2018-02-16 | 登士柏希罗纳有限公司 | Cutting device, particularly dentistry cutting device |
| CN107708601B (en) * | 2015-04-16 | 2020-09-08 | 登士柏希罗纳有限公司 | Cutting instrument, in particular dental cutting instrument |
| CN105562788A (en) * | 2015-11-04 | 2016-05-11 | 深圳市金洲精工科技股份有限公司 | Drill bit for drilling PCB |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3186747U (en) | 2013-10-24 |
| TWM467521U (en) | 2013-12-11 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140122 |