CN107717021A - Carbon fibre reinforced composite target drill with Circular Nose Cutting Edge blade - Google Patents
Carbon fibre reinforced composite target drill with Circular Nose Cutting Edge blade Download PDFInfo
- Publication number
- CN107717021A CN107717021A CN201711047792.8A CN201711047792A CN107717021A CN 107717021 A CN107717021 A CN 107717021A CN 201711047792 A CN201711047792 A CN 201711047792A CN 107717021 A CN107717021 A CN 107717021A
- Authority
- CN
- China
- Prior art keywords
- cutting edge
- blade
- main body
- reinforced composite
- carbon fibre
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B51/00—Tools for drilling machines
- B23B51/08—Drills combined with tool parts or tools for performing additional working
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2222/00—Materials of tools or workpieces composed of metals, alloys or metal matrices
- B23B2222/28—Details of hard metal, i.e. cemented carbide
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2226/00—Materials of tools or workpieces not comprising a metal
- B23B2226/31—Diamond
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2251/00—Details of tools for drilling machines
- B23B2251/08—Side or plan views of cutting edges
- B23B2251/082—Curved cutting edges
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2251/00—Details of tools for drilling machines
- B23B2251/14—Configuration of the cutting part, i.e. the main cutting edges
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2251/00—Details of tools for drilling machines
- B23B2251/18—Configuration of the drill point
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2251/00—Details of tools for drilling machines
- B23B2251/40—Flutes, i.e. chip conveying grooves
- B23B2251/408—Spiral grooves
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2251/00—Details of tools for drilling machines
- B23B2251/50—Drilling tools comprising cutting inserts
- B23B2251/505—Drilling tools comprising cutting inserts set at different heights
Abstract
The invention discloses a kind of carbon fibre reinforced composite target drill with Circular Nose Cutting Edge blade, including drill main body, two small inclination helicla flutes are processed on described drill main body outer circumference surface vertically, described 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 the apex point portion of circular arc, the reamer of circular arc, the multiple-cutting-edge tip with cutting edge in circular arc and inclination angle reamer, and two cutting edges are connected by chisel edge at apex point portion.The present invention 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, crudy and cutter life be improved, so as to improve the qualification rate of product.
Description
Technical field
The invention belongs to drilling tool technical field, is answered more particularly to a kind of fibre reinforced with Circular Nose Cutting Edge blade
Condensation material target drill.
Background technology
Carbon fibre reinforced composite（CFRP）With the excellent properties such as specific strength is high, specific modulus is big, in Aero-Space height
New technical field has broad application prospects.Currently, American-European large aircraft organism material just from based on aluminium alloy to compound
Material is main transition, 50wt% composites 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 because there is CFRP anisotropy and interlayer to connect
The features such as connecing intensity difference, the manufacturing deficiencies such as layering, burr are easily produced in hole entry and exit side using normal drill bit drilling.And divide
Layer has a strong impact on material property, and it will cause stress concentration and Crack Extension, 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 govern 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, it is set effectively to 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 present invention provides one kind and can effectively solve the problem that existing drilling cutter is difficult to avoid that hair
The problem of thorn, layering, improve the carbon fibre reinforced composite target drill of branch hole quality.
The technical solution adopted by the present invention is：A kind of carbon fibre reinforced composite special jewel with Circular Nose Cutting Edge blade
Head, including drill main body, two small inclination helicla flutes, described spiral are processed vertically on described drill main body outer circumference surface
Groove 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 circular arc
Apex point portion, circular arc reamer, have circular arc in cutting edge multiple-cutting-edge tip and inclination angle reamer be connected in sequence,
Two cutting edges are connected by chisel edge at apex point portion.
In the above-mentioned carbon fibre reinforced composite target drill with Circular Nose Cutting Edge blade, the top angle in apex point portion is
110 °~120 °, the top angle of reamer is 14 °~20 °.
In the above-mentioned carbon fibre reinforced composite target drill with Circular Nose Cutting Edge blade, the circle of 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 reaming
The cutting edge in portion is tangent.
In the above-mentioned carbon fibre reinforced composite target drill with Circular Nose Cutting Edge blade, in multiple-cutting-edge tip, cutting edge
For circular arc, its arc radius is directly proportional to drill bit whole geometry size, and the angle of interior cutting edge and drill main body axis is
60 °~85 °.
In the above-mentioned carbon fibre reinforced composite target drill with Circular Nose Cutting Edge blade, the cutting in the reamer of inclination angle
There is angle, the angle should be less than the half at the top angle of the reamer of circular arc between sword and drill main body axis.
In the above-mentioned carbon fibre reinforced composite target drill with Circular Nose Cutting Edge blade, 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 carbon fibre reinforced composite target drill with Circular Nose Cutting Edge blade, two cutting edges on blade
Normal rake is 0 °~15 °, and normal relief angle is 10 °~20 °.
In the above-mentioned carbon fibre reinforced composite target drill with Circular Nose Cutting Edge blade, described blade material is poly-
Diamond, it 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 invention are as follows：
1. two small inclination helicla flutes are set on the drill main body outer circumference surface of the present invention, can be suitable by chip in boring procedure
Profit discharge.
2. the head soldering polycrystalline diamond of the drill main body of the present invention（PCD）Blade, cutting force can be reduced, improved
Cutter anti-wear performance, improve drilling quality.
3. the blade of the present invention includes two cutting edges, the blade type structures of two cutting edges be respectively provided with circular arc apex point portion,
Reamer, multiple-cutting-edge tip and inclination angle reamer, pass through the different division of labor of each portion during drilling, it is possible to achieve interim goes
Flash removed, layering, reach impulse- free robustness and layering drilling effect, wherein, the function in circular arc apex point portion is smoothly to pierce workpiece,
Simultaneously play the function of centering, but can now cause drilling burr, layering preliminarily form；The function of reamer is to make aperture
Further expand, but can guarantee that burr, the degree of layering do not deteriorate in reaming；The function of multiple-cutting-edge tip is in hole most end form
Cheng Qian, can be by property cut by the fiber on hole periphery, while ensures that burr, the degree of layering are smaller than the reaming stage；Inclination angle reaming
The function in portion is to make aperture further be extended to final aperture, while utilizes " micro- sword cutting " principle by burr, the journey of layering
Degree further reduces, and is finally reached the purpose of flash removed and layering, improves drilling quality.
4. two cutting edges of the present invention are connected by chisel edge, the setting of chisel edge may insure that drill bit smoothly pierces composite wood
Material.
Brief description of the drawings
Fig. 1 is the structure chart of the present invention.
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 present invention.
Embodiment
The present invention is further illustrated below in conjunction with the accompanying drawings.
As shown in figures 1-4, the present invention includes drill main body 1, is processed vertically on the described outer circumference surface of drill main body 1
Two helicla flutes 2, described helicla flute 2 is left-handed, and the angle of helicla flute 2 and axis is helical angleδ, two helicla flutes 2 exist
The head of drill main body 1 connects blade 11 respectively, and the described material of blade 11 is polycrystalline diamond（PCD）, it is welded on drill bit master
The head of 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
Bar cutting edge, blade is by the apex point portion I of circular arc, the reamer II of circular arc, the multiple-cutting-edge tip with cutting edge in circular arc
III and inclination angle reamer IV be connected in sequence, two cutting edges are connected by chisel edge 3 at apex point portion I.The chisel edge 3 and its
In a cutting edge rear knife face it 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, its arc radiusR 2Directly proportional to drill bit whole geometry size, interior cutting edge 6 and the cutting edge 5 of reamer II are tangent, interior
The angle of cutting edge 6 and the axis of drill main body 1θFor 60 °~85 °.In inclination angle reamer IV, cutting edge 7 should be with the axle of drill main body 1
There is angle between lineγ, the angleγThe half at the top angle of reamer II is should be less than, scope is between 5 °~10 °.
The angle of helicla flute 2 and axis is helical angleδ, the helical angleδScope of design between 0~15 °, this embodiment party
The helicla flute is set in case, 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 construction, it is not necessary to 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,
Pass through the different division of labor of each several part during drilling, it is possible to achieve interim goes flash removed, layering, reaches impulse- free robustness and divides
Layer drilling effect.Apex point position I, drill bit can be made smoothly to pierce workpiece when drilling starts, while play a part of centering, but
Can now cause drilling burr, layering preliminarily form.Reamer II, aperture can be made further to be 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 shaped 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, and the embodiment make use of drill bit in drilling process
The drilling principle of " first cutting pusher ".Inclination angle reamer IV, aperture can be made further to be extended to final aperture, while utilized " 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, in the present embodiment drill main body 1 head soldering polycrystalline diamond（PCD）The blade 11 of material,
The thickness of blade 11ΔtBetween 0.8~1mm.The anti-wear performance of cutter can be improved and further reduce burr, layering, can be entered
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 12mm drill bit, the top angle 2 in apex point portion IαFor 115 °, the center of circle of cutting edge 4 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 interior cutting edge 6R 2For
4mm, the angle of interior cutting edge 6 and the axis of drill main body 1θFor 70 °, it can be ensured that drilling axial force is not excessive, while ensures geometry
The reasonable transition of size.The angle of cutting edge 7 and the axis of drill main body 1 in inclination angle reamer IVγFor 8 °, it can be ensured that burr, divide
Layer degree is reduced as far as possible.
The present invention is applicable under various cutting parameters, especially in the slow-speed of revolution, low feeding（Such as the rpm of the speed of mainshaft 2000, feeding
The mm/min of speed 105）Under the conditions of drilling process it is extremely stable, therefore, be very suitable for live drilling processing, have fabulous
Popularization.
Claims (8)
1. a kind of carbon fibre reinforced composite target drill with Circular Nose Cutting Edge blade, including drill main body（1）, described brill
Head main body（1）Two small inclination helicla flutes are processed on outer circumference surface vertically（2）, described helicla flute（2）Rotation direction is identical, two spiral shells
Spin slot（2）Blade is connected respectively on drill main body head（11）, it is characterised in that：Blade（11）Include two cutting edges, blade
By the apex point portion of circular arc（Ⅰ）, circular arc reamer（Ⅱ）, have circular arc in cutting edge multiple-cutting-edge tip（Ⅲ）And inclination 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 carbon fibre reinforced composite target drill according to claim 1 with Circular Nose Cutting Edge blade, its feature exist
In：Apex point portion（Ⅰ）Top angle be 110 °~120 °, reamer（Ⅱ）Top angle be 14 °~20 °.
3. the carbon fibre reinforced composite target drill according to claim 1 with Circular Nose Cutting Edge blade, its feature exist
In：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 drill bit
Whole geometry size is directly proportional, apex point portion（Ⅰ）Cutting edge（4）With reamer（Ⅱ）Cutting edge（5）It is tangent.
4. the carbon fibre reinforced composite target drill according to claim 3 with Circular Nose Cutting Edge blade, its feature exist
In：In multiple-cutting-edge tip（Ⅲ）In, cutting edge（6）For circular arc, with cutting edge（5）It is tangent；Cutting edge（6）Arc radius（R 2）
It is directly proportional to drill bit whole geometry size, interior cutting edge（6）With drill main body（1）The angle of axis（θ）For 85 °~60 °.
5. the carbon fibre reinforced composite target drill according to claim 1 with Circular Nose Cutting Edge blade, its feature exist
In：Inclination angle reamer（Ⅳ）In, cutting edge（7）Should be with drill main body（1）There is angle between axis（γ）, the angle（γ）It is small
In reamer（Ⅱ）Top angle half.
6. the carbon fibre reinforced composite target drill according to claim 1 with Circular Nose Cutting Edge blade, its feature exist
In：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 carbon fibre reinforced composite target drill according to claim 1 with Circular Nose Cutting Edge blade, its feature exist
In：The normal rake of two cutting edges is 0 °~15 ° on blade, and normal relief angle is 10 °~20 °.
8. the carbon fibre reinforced composite target drill according to claim 1 with Circular Nose Cutting Edge blade, its feature exist
In：Described blade（11）Material is polycrystalline diamond, is welded on drill main body（1）Head；Or blade（11）With drill bit
Main body（1）Structure is integral, is made of hard alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711047792.8A CN107717021A (en) | 2017-10-31 | 2017-10-31 | Carbon fibre reinforced composite target drill with Circular Nose Cutting Edge blade |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711047792.8A CN107717021A (en) | 2017-10-31 | 2017-10-31 | Carbon fibre reinforced composite target drill with Circular Nose Cutting Edge blade |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107717021A true CN107717021A (en) | 2018-02-23 |
Family
ID=61202841
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711047792.8A Pending CN107717021A (en) | 2017-10-31 | 2017-10-31 | Carbon fibre reinforced composite target drill with Circular Nose Cutting Edge blade |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107717021A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108465849A (en) * | 2018-05-31 | 2018-08-31 | 华伟纳精密工具（昆山）有限公司 | Deburring drill bit |
| CN108608040A (en) * | 2018-05-10 | 2018-10-02 | 大连理工大学 | For composite material and its micro- serrated knife tool of the double ladders of the perpendicular sword of laminated construction high quality drilling |
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| Publication number | Priority date | Publication date | Assignee | Title |
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