CN207415527U - For the drill bit with Circular Nose Cutting Edge blade of carbon fibre reinforced composite - Google Patents
For the drill bit with Circular Nose Cutting Edge blade of carbon fibre reinforced composite Download PDFInfo
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- CN207415527U CN207415527U CN201721422351.7U CN201721422351U CN207415527U CN 207415527 U CN207415527 U CN 207415527U CN 201721422351 U CN201721422351 U CN 201721422351U CN 207415527 U CN207415527 U CN 207415527U
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- cutting edge
- blade
- main body
- reinforced composite
- carbon fibre
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Abstract
The utility model discloses a kind of drill bits with Circular Nose Cutting Edge blade for carbon fibre reinforced composite, including drill main body, two small inclination helicla flutes are processed on the drill main body outer circumference surface vertically, the helicla flute rotation direction is identical, two helicla flutes connect blade respectively on drill main body head, blade includes two cutting edges, blade is connected in sequence by arc-shaped apex point portion, arc-shaped reamer, the multiple-cutting-edge tip with arc-shaped interior cutting edge and inclination angle reamer, and two cutting edges are connected by chisel edge at apex point portion.The utility model can be effectively prevented from the appearance of phenomena such as burr in carbon fibre reinforced composite drilling process, layering, reduce drilling defect, processing efficiency, processing quality and cutter life be improved, so as to improve the qualification rate of product.
Description
Technical field
The utility model belongs to drilling tool technical field, more particularly to a kind of for carbon fibre reinforced composite
Drill bit with Circular Nose Cutting Edge blade.
Background technology
Carbon fibre reinforced composite（CFRP）With the excellent properties such as specific strength is high, specific modulus is big, in aerospace height
New technical field has broad application prospects.Currently, American-European large aircraft organism material just from based on aluminium alloy to compound
Material be main transition, 50wt% composite materials dosage by be future aircraft starting point.In assembly connection, it is necessary to carry out substantial amounts of
Hole machined, such as a frame Boeing-747 fighter plane have more than nearly 300 ten thousand connecting holes.But since there is CFRP anisotropy and interlayer to connect
The features such as connecing intensity difference easily generates the manufacturing deficiencies such as layering, burr using normal drill bit drilling in hole entry and exit side.And divide
Layer seriously affects material property, it will cause stress concentration and crack propagation, reduce performance and the company of composite element
Intensity is connect, is even scrapped.In addition, to avoid the influence of burr, it is necessary to remove burr by deburring operation, so as to influence
Processing efficiency and processing cost.These seriously restrict popularization of the CFRP materials in aerospace field high-end product with answering
With.Therefore, it is necessary to be improved to existing drill bit structure, make it that can effectively be avoided in carbon fibre reinforced composite drilling point
Layer, the generation of burr.
The content of the invention
In order to solve the above-mentioned technical problem, the utility model provides one kind and can effectively solve the problem that existing drilling cutter is difficult to keep away
The problem of exempting from burr, layering improves the carbon fibre reinforced composite target drill of branch hole quality.
The technical solution adopted in the utility model is：It is a kind of that there is Circular Nose Cutting Edge blade for carbon fibre reinforced composite
Drill bit, including drill main body, two small inclination helicla flutes are processed on the drill main body outer circumference surface vertically, it is described
Helicla flute rotation direction is identical, and two helicla flutes connect blade on drill main body head respectively, and blade includes two cutting edges, and blade is by justifying
Apex point portion, arc-shaped reamer, the multiple-cutting-edge tip with arc-shaped interior cutting edge and the inclination angle reamer of arc are sequentially connected
It forms, two cutting edges are connected by chisel edge at apex point portion.
In the above-mentioned drill bit with Circular Nose Cutting Edge blade for carbon fibre reinforced composite, the top angle in apex point portion is
110 °~120 °, the top angle of reamer is 14 °~20 °.
In the above-mentioned drill bit with Circular Nose Cutting Edge blade for carbon fibre reinforced composite, the cutting edge in apex point portion
Arc radius and the center of circle are directlyed proportional to the axis offset distance of drill main body to drill bit whole geometry size, the cutting edge in apex point portion and expansion
The cutting edge of hole portion is tangent.
In the above-mentioned drill bit with Circular Nose Cutting Edge blade for carbon fibre reinforced composite, in multiple-cutting-edge tip, cutting
Sword is arc-shaped, and arc radius is directly proportional to drill bit whole geometry size, and the angle of cutting edge and drill main body axis is
60 °~85 °.
In the above-mentioned drill bit with Circular Nose Cutting Edge blade for carbon fibre reinforced composite, cutting in the reamer of inclination angle
Cutting has angle between sword and drill main body axis, which should be less than the half at the top angle of arc-shaped reamer.
In the above-mentioned drill bit with Circular Nose Cutting Edge blade for carbon fibre reinforced composite, the thickness of bladeFor0.8
~1mm, chisel edge width are 0.5~1.5mm, and the inclination angle of chisel edge is 50 °~60 °.
In the above-mentioned drill bit with Circular Nose Cutting Edge blade for carbon fibre reinforced composite, two cutting edges on blade
Normal rake for 0 °~15 °, normal relief angle is 10 °~20 °.
In the above-mentioned drill bit with Circular Nose Cutting Edge blade for carbon fibre reinforced composite, the blade material is
Polycrystalline diamond is welded on the head of drill main body；Or blade is integral structure with drill main body, using hard alloy system
Into.
With prior art both sides, the beneficial effects of the utility model are：
1. two small inclination helicla flutes are set on the drill main body outer circumference surface of the utility model, it can be in boring procedure
Chip is smoothly discharged.
2. the head soldering polycrystalline diamond of the drill main body of the utility model（PCD）Blade can reduce cutting force,
Cutter wear-resisting property is improved, improves drilling quality.
3. the blade of the utility model includes two cutting edges, the blade type structure of two cutting edges is respectively provided with arc-shaped brill
Tip, reamer, multiple-cutting-edge tip and inclination angle reamer, can be with implementation phase by the different division of labor of each portion during drilling
Property go flash removed, layering, reach impulse- free robustness and layering drilling effect, wherein, the function in arc-shaped apex point portion is smoothly to bore
Enter workpiece, while play the function of centering, but can cause at this time drilling burr, layering preliminarily form；The function of reamer exists
In aperture is made further to expand, but it can guarantee that burr, the degree of layering do not deteriorate in reaming；The function of multiple-cutting-edge tip is
, can be by property cut by the fiber on hole periphery before hole ultimately forms, while ensure that burr, the degree of layering are smaller than the reaming stage；
The function of inclination angle reamer is aperture is made further to be extended to final aperture, at the same utilize " micro- sword cutting " principle by burr,
The degree of layering further reduces, and is finally reached the purpose of flash removed and layering, improves drilling quality.
4. two cutting edges of the utility model are connected by chisel edge, the setting of chisel edge may insure that drill bit smoothly pierces again
Condensation material.
Description of the drawings
Fig. 1 is the structure chart of the utility model.
Fig. 2 is B direction views in Fig. 1.
Fig. 3 is A-A sectional views in Fig. 1.
Fig. 4 is the structure chart at the cutting edge of the utility model.
Specific embodiment
The utility model will be further described below with reference to the accompanying drawings.
As shown in figures 1-4, the utility model includes drill main body 1, on 1 outer circumference surface of drill main body vertically
Two helicla flutes 2 are processed, the helicla flute 2 is left-handed, and helicla flute 2 and the angle of axis are helical angleδ, two helicla flutes
2 connect blade 11 on the head of drill main body 1 respectively, and 11 material of blade is polycrystalline diamond（PCD）, it is welded on drill bit
The head of main body 1.It can also be that blade 11 is integral structure with drill main body 1, be made of hard alloy.Blade 11 includes
Two cutting edges, blade is by arc-shaped apex point portion I, arc-shaped reamer II, the multiple-cutting-edge point with arc-shaped interior cutting edge
Portion III and inclination angle reamer IV are connected in sequence, and two cutting edges are connected by chisel edge 3 at apex point portion I.The chisel edge 3 with
The rear knife face of wherein one cutting edge is tangent, the apex point profile parallel with another cutting edge.
The top angular region in apex point portion I is between 110 °~120 °, the arc radius of the cutting edge 4 in apex point portion IR 1And circle
The axis offset distance of the heart and drill main body 1ΔεIt is directly proportional to drill bit whole geometry size, cutting edge 4 and the reamer II in apex point portion I
Cutting edge 5 it is tangent.The top angle 2 of reamer IIβScope is between 14 °~20 °.In multiple-cutting-edge tip III, cutting edge 6 is circular arc
Shape, arc radiusR 2Directly proportional to drill bit whole geometry size, cutting edge 6 and the cutting edge 5 of reamer II are tangent, cutting
The angle of sword 6 and 1 axis of drill main bodyθFor 60 °~85 °.In inclination angle reamer IV, cutting edge 7 should with 1 axis of drill main body it
Between have angleγ, the angleγThe half at the top angle of reamer II is should be less than, scope is between 5 °~10 °.
Helicla flute 2 and the angle of axis are helical angleδ, the helical angleδScope of design between 0~15 °, this embodiment party
The helicla flute in case is set, chip can smoothly be discharged, improves stock-removing efficiency and chip removal ability.
The outer circumference surface of drill main body 1 sets two small inclination helicla flutes 2, is constructed for normal drill bit structure, can be effective
Used in all kinds of boring milling equipments, it is simple in structure, be not required design specialized fixture or lathe.
The blade type structure of two cutting edges is respectively provided with apex point portion I, reamer II, multiple-cutting-edge tip position III and inclination angle reamer IV,
By the different division of labor of each several part during drilling, can flash removed, layering be gone with implementation phase, reach impulse- free robustness and divide
Layer drilling effect.Apex point position I can make drill bit smoothly pierce workpiece when drilling starts, while play the role of centering, but
Can cause at this time drilling burr, layering preliminarily form.Reamer II can be such that aperture is further extended, but in reaming
It can guarantee that burr, the degree of layering do not deteriorate, efficiently control burr, the generation of layering.Multiple-cutting-edge tip III finally shapes in hole
Before（Before aperture is up to final size）, dragging for hole peripheral fiber can be eliminated by the fiber on hole periphery first by property cut
Drawing acts on, it can be ensured that burr, the degree of layering are smaller than the reaming stage, which make use of drill bit in drilling process
The drilling principle of " first cutting pusher ".Inclination angle reamer IV can make aperture further be extended to final aperture, while utilize " micro-
Sword cutting " principle further reduces the degree of burr, layering, is finally reached the purpose of flash removed and layering.
As shown in Figure 2,3, the head of drill main body 1 is brazed polycrystalline diamond in the present embodiment（PCD）The blade 11 of material,
The thickness of blade 11ΔtBetween 0.8~1mm.The wear-resisting property of cutter can be improved and further reduce burr, layering, it can be into
One step effectively improves drilling quality and cutter life.The chisel edge width in apex point portion IΔLScope is between 0.5~1.5mm, chisel edge
Inclination angleζFor 50 °~60 °, drilling axial force when piercing can be effectively reduced.The normal rake of two cutting edges of blade 11γ 0Scope is between 0 °~15 °, normal relief angleα 0Scope can effectively reduce cutting force between 10 °~20 °.
WithφExemplified by the drill bit of 12mm, the top angle 2 in apex point portion IαFor 115 °, 4 center of circle of cutting edge and drill bit in apex point portion I
The axis offset distance of main body 1ΔεScope is between 4~5mm, the arc radius of cutting edge 4R 1For 16mm, can effectively reduce layering,
The generation of burr.Cutting edge 5 should be tangent with the cutting edge 4 in apex point portion I in reamer II, and the top angle of reamer II is
18 °, it can be ensured that burr, degeee of stratification do not deteriorate further while aperture is extended.The arc radius of cutting edge 6R 2For 4mm,
The angle of cutting edge 6 and 1 axis of drill main bodyθFor 70 °, it can be ensured that drilling axial force is not excessive, while ensures physical dimension
Reasonable transition.The angle of cutting edge 7 and 1 axis of drill main body in inclination angle reamer IVγFor 8 °, it can be ensured that burr, degeee of stratification
It is reduced as far as possible.
The utility model is applicable under various cutting parameters, especially in the slow-speed of revolution, low feeding（Such as 2000 rpm of the speed of mainshaft,
105 mm/min of feed speed）Under the conditions of drilling process extremely stablize, therefore, be very suitable for live drilling processing, there is pole
Good popularization.
Claims (8)
1. a kind of drill bit with Circular Nose Cutting Edge blade for carbon fibre reinforced composite, including drill main body（1）, it is described
Drill main body（1）Two small inclination helicla flutes are processed on outer circumference surface vertically（2）, the helicla flute（2）Rotation direction is identical, and two
Helicla flute（2）Blade is connected respectively on drill main body head（11）, it is characterised in that：Blade（11）Include two cutting edges, knife
Piece is by arc-shaped apex point portion（Ⅰ）, arc-shaped reamer（Ⅱ）, have arc-shaped interior cutting edge multiple-cutting-edge tip（Ⅲ）With incline
Angle reamer（Ⅳ）It is connected in sequence, apex point portion（Ⅰ）Two cutting edges in place pass through chisel edge（3）It is connected.
2. the drill bit with Circular Nose Cutting Edge blade according to claim 1 for carbon fibre reinforced composite, feature
It is：Apex point portion（Ⅰ）Top angle for 110 °~120 °, reamer（Ⅱ）Top angle be 14 °~20 °.
3. the drill bit with Circular Nose Cutting Edge blade according to claim 1 for carbon fibre reinforced composite, feature
It is：Apex point portion（Ⅰ）Cutting edge（4）Arc radius（R 1）And the center of circle and drill main body（1）Axis offset distance（Δε）With brill
Head whole geometry size is directly proportional, apex point portion（Ⅰ）Cutting edge（4）With reamer（Ⅱ）Cutting edge（5）It is tangent.
4. the drill bit with Circular Nose Cutting Edge blade according to claim 3 for carbon fibre reinforced composite, feature
It is：In multiple-cutting-edge tip（Ⅲ）In, cutting edge（6）To be arc-shaped, with cutting edge（5）It is tangent；Cutting edge（6）Arc radius
（R 2）To directly proportional, the cutting edge of drill bit whole geometry size（6）With drill main body（1）The angle of axis（θ）For 85 °~60 °.
5. the drill bit with Circular Nose Cutting Edge blade according to claim 1 for carbon fibre reinforced composite, feature
It is：Inclination angle reamer（Ⅳ）In, cutting edge（7）It should be with drill main body（1）There is angle between axis（γ）, the angle（γ）
Less than reamer（Ⅱ）Top angle half.
6. the drill bit with Circular Nose Cutting Edge blade according to claim 1 for carbon fibre reinforced composite, feature
It is：The thickness of bladeFor0.8~1mm, chisel edge width are 0.5~1.5mm, and the inclination angle of chisel edge is 50 °~60 °.
7. the drill bit with Circular Nose Cutting Edge blade according to claim 1 for carbon fibre reinforced composite, feature
It is：The normal rake of two cutting edges is 0 °~15 ° on blade, and normal relief angle is 10 °~20 °.
8. the drill bit with Circular Nose Cutting Edge blade according to claim 1 for carbon fibre reinforced composite, feature
It is：The blade（11）Material is polycrystalline diamond, is welded on drill main body（1）Head；Or blade（11）With brill
Head main body（1）Structure is integral, is made of hard alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721422351.7U CN207415527U (en) | 2017-10-31 | 2017-10-31 | For the drill bit with Circular Nose Cutting Edge blade of carbon fibre reinforced composite |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721422351.7U CN207415527U (en) | 2017-10-31 | 2017-10-31 | For the drill bit with Circular Nose Cutting Edge blade of carbon fibre reinforced composite |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207415527U true CN207415527U (en) | 2018-05-29 |
Family
ID=62309243
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721422351.7U Expired - Fee Related CN207415527U (en) | 2017-10-31 | 2017-10-31 | For the drill bit with Circular Nose Cutting Edge blade of carbon fibre reinforced composite |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207415527U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113844064A (en) * | 2021-09-23 | 2021-12-28 | 沈阳航空航天大学 | CFRP low-damage sliding cutting method and hole making drill bit |
-
2017
- 2017-10-31 CN CN201721422351.7U patent/CN207415527U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113844064A (en) * | 2021-09-23 | 2021-12-28 | 沈阳航空航天大学 | CFRP low-damage sliding cutting method and hole making drill bit |
| CN113844064B (en) * | 2021-09-23 | 2023-09-05 | 沈阳航空航天大学 | CFRP low-damage sliding cutting method and drilling bit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180529 Termination date: 20201031 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |