CN107717020A - Carbon fibre reinforced composite target drill with straight sword type blade - Google Patents
Carbon fibre reinforced composite target drill with straight sword type blade Download PDFInfo
- Publication number
- CN107717020A CN107717020A CN201711042733.1A CN201711042733A CN107717020A CN 107717020 A CN107717020 A CN 107717020A CN 201711042733 A CN201711042733 A CN 201711042733A CN 107717020 A CN107717020 A CN 107717020A
- Authority
- CN
- China
- Prior art keywords
- cutting
- reamer
- angle
- edge
- blade
- 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
- B23B2251/14—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 straight sword type blade, including drill main body, two helicla flutes are processed on described drill main body outer circumference surface vertically, the rotation direction of two described helicla flutes is identical, two helicla flutes connect blade respectively on drill main body head, blade includes two cutting edges, blade is divided into apex point portion, reamer, multiple-cutting-edge tip and inclination angle reamer from front to back, apex point portion, reamer, the cutting edge of multiple-cutting-edge tip and inclination angle reamer are mutually misaligned straight line, and are sequentially connected；Two cutting edges are connected by chisel edge at apex point portion.The present invention reduces drilling defect, processing efficiency, crudy and cutter life is improved, so as to improve the qualification rate of product it is possible to prevente effectively from appearance phenomena such as burr in carbon fibre reinforced composite drilling process, layering.
Description
Technical field
The invention belongs to drilling tool technical field, is answered more particularly to a kind of fibre reinforced with straight sword type 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 a kind of carbon fibre reinforced composite with straight sword type blade
Target drill, to solve the problems such as easy delamination in carbon fibre reinforced composite drilling process, generation burr, so as to improve carbon fibre
Dimension enhancing composite drilling crudy and processing efficiency.
The technical solution adopted by the present invention is：A kind of carbon fibre reinforced composite special jewel with straight sword type blade
Head, including drill main body, two helicla flutes, described two helicla flutes are processed vertically on described drill main body outer circumference surface
Rotation direction it is identical, two helicla flutes connect blade on drill main body head respectively, and blade includes two cutting edges, and blade is from front to back
It is divided into apex point portion, reamer, multiple-cutting-edge tip and inclination angle reamer, apex point portion, reamer, multiple-cutting-edge tip and inclination angle reamer are cut
Sword is cut as mutually misaligned straight line, and is sequentially connected, the angle between apex point portion cutting edge and reamer cutting edge is in obtuse angle, more
The cutting edge of angle and multiple-cutting-edge tip between the cutting edge in blade tip portion and the cutting edge of reamer and the cutting of inclination angle reamer
Angle between sword is acute angle；Two cutting edges are connected by chisel edge at apex point portion.
In the above-mentioned carbon fibre reinforced composite target drill with straight sword type 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 straight sword type blade, the cutting edge of multiple-cutting-edge tip with
The angle of drill main body axis is 60 °~85 °.
In the above-mentioned carbon fibre reinforced composite target drill with straight sword type blade, the cutting edge of inclination angle reamer
There is angle between drill main body axis, the angle is less than the half at the top angle of reamer.
In the above-mentioned carbon fibre reinforced composite target drill with straight sword type blade, two on drill main body are cut
The normal rake for cutting sword is 0 °~15 °, and normal relief angle is 10 °~20 °.
In the above-mentioned carbon fibre reinforced composite target drill with straight sword type blade, described chisel edge width is
0.5~1.5mm, the inclination angle of chisel edge is 50 °~60 °.
In the above-mentioned carbon fibre reinforced composite target drill with straight sword type 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.
Compared with prior art, the beneficial effects of the invention are as follows：
1. the drill main body outer circumference surface of the present invention is provided with two small inclination helicla flutes, can be suitable by chip in boring procedure
Profit discharge.
2. blade material of the present invention on the head of drill main body is polycrystalline diamond, cutting force can be reduced, improves knife
Have anti-wear performance, improve drilling quality.
3. the blade of the present invention includes two cutting edges, blade is divided into apex point portion, reamer, multiple-cutting-edge tip and inclination angle reaming
Portion, pass through the different division of labor of each position during drilling, it is possible to achieve interim goes flash removed, layering, reaches impulse- free robustness
With layering drilling effect, wherein, the function in apex point portion is smoothly to pierce workpiece, while plays the function of centering, but now can
Cause drilling burr, layering preliminarily form；The function of reamer is to make aperture further expand, but can guarantee that in reaming
Burr, the degree of layering do not deteriorate；The function of multiple-cutting-edge tip is before being ultimately formed in hole, can be smooth by the fiber on hole periphery
Cut-out, while ensure that burr, the degree of layering are smaller than the reaming stage；The function of inclination angle reamer is to make aperture further expand
To final aperture, while utilize " micro- sword cutting " principle further to reduce the degree of burr, layering, be finally reached flash removed
With the purpose of layering, drilling quality is improved.
4. two cutting edges of the blade of the present invention are connected by chisel edge, the setting of chisel edge may insure that drill bit smoothly pierces again
Condensation material.
Brief description of the drawings
Fig. 1 is the structure chart of the present invention.
Fig. 2 is the B direction views in Fig. 1.
Fig. 3 is the A-A sectional views in Fig. 1.
Fig. 4 is the structure chart at the cutting edge of the present invention.
Embodiment
The invention will be further described below in conjunction with the accompanying drawings.
As shown in Fig. 1~2, the present invention includes drill main body 1, is processed vertically on the described outer circumference surface of drill main body 1
The helicla flute 2 of two small inclinations, described helicla flute 2 is left-handed, and the angle of helicla flute 2 and axis is helical angleδ, the spiral shell
Swing angleδFor 0~15 °, chip can smoothly be discharged, improve stock-removing efficiency and chip removal ability.
Two helicla flutes 2 connect blade 11 on drill main body head respectively, and the material of blade 11 is polycrystalline diamond, is welded on
The head of drill 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 wraps
Containing two cutting edges, blade 11 is divided into apex point portion I, reamer II, multiple-cutting-edge tip III and inclination angle reamer IV, apex point from front to back
Portion I, reamer II, the cutting edge 4,5,6,7 of multiple-cutting-edge tip III and inclination angle reamer IV are mutually misaligned straight line, and connected successively
Connect.Angle between the cutting edge 4 in apex point portion I and the cutting edge 5 of reamer II in obtuse angle, the cutting edge 6 of multiple-cutting-edge tip III with
Between the cutting edge 6 of angle and multiple-cutting-edge tip III and the cutting edge 7 of inclination angle reamer IV between the cutting edge 5 of reamer II
Angle is acute angle.Two cutting edges are connected by chisel edge 3 at apex point portion I.The rear knife face of the chisel edge 3 and wherein one cutting edge
It is tangent, the apex point profile parallel with another cutting edge.
Blade 11 is divided into apex point portion I, reamer II, multiple-cutting-edge tip III and inclination angle reamer IV from front to back, passes through each portion
The different division of labor divided during drilling, it is possible to achieve interim goes flash removed, layering, reaches impulse- free robustness and is layered drilling effect
Fruit.
Apex point portion I can make drill bit smoothly pierce workpiece when drilling starts, while play a part of centering, but now can
Cause drilling burr, layering preliminarily form.Reamer II can be such that aperture is further extended, but hair is can guarantee that in reaming
Thorn, the degree of layering do not deteriorate, and efficiently control burr, the generation of layering.Before multiple-cutting-edge tip III finally shapes in hole（Aperture is
Before being up to final size）, can be by the fiber on hole periphery first by property cut, eliminate hole peripheral fiber pulls effect, can
To ensure that burr, the degree being layered are smaller than the reaming stage, the embodiment make use of drill bit " first to cut pusher " in drilling process
Drilling principle.Inclination angle reamer IV can make aperture further be extended to final aperture, while utilize " micro- sword cutting " principle
The degree of burr, layering is further reduced, is finally reached the purpose of flash removed and layering.
As shown in Figure 2,3, in the present invention, the width of chisel edge 3ΔLFor 0.5~1.5mm, the inclination angle of chisel edge 3ζFor 50 °~
60 °, it can effectively reduce drilling axial force when piercing.The thickness of blade 11ΔtFor 0.8~1mm, the wearability of cutter can be improved
Burr, layering and can be further reduced, can further effectively improve drilling quality and cutter life.Two on drill main body 1
The normal rake of cutting edgeγ 0For 0 °~15 °, normal relief angleα 0For 10 °~20 °, cutting force can be effectively reduced.
As shown in figure 4, in the present invention, the top angle in apex point portion I（2α）Scope can be reduced effectively between 110 °~120 °
Layering, the generation of burr.The top angle of reamer II（2β）Scope is between 14 °~20 °, it can be ensured that while aperture is extended
Burr, degeee of stratification do not deteriorate further.The cutting edge 6 of multiple-cutting-edge tip III and the angle of the axis of drill main body 1θScope is at 60 °
Between~85 °, it can be ensured that drilling axial force is not excessive, while ensures the reasonable transition of physical dimension.Inclination angle reamer IV is cut
Cut the angle of sword 7 and the axis of drill main body 1γScope is between 5 °~10 °, it can be ensured that burr, degeee of stratification are 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 (7)
1. a kind of carbon fibre reinforced composite target drill with straight sword type blade, including drill main body（1）, described brill
Head main body（1）Two helicla flutes are processed on outer circumference surface vertically（2）, described two helicla flutes（2）Rotation direction it is identical, two spiral shells
Spin slot（2）Blade is connected respectively on drill main body head（11）, blade includes two cutting edges, it is characterized in that：Blade is from forward direction
After be divided into apex point portion（Ⅰ）, reamer（Ⅱ）, multiple-cutting-edge tip（Ⅲ）With inclination angle reamer（Ⅳ）, apex point portion（Ⅰ）, reamer（Ⅱ）、
Multiple-cutting-edge tip（Ⅲ）With inclination angle reamer（Ⅳ）Cutting edge be mutually misaligned straight line, and being sequentially connected, apex point portion（Ⅰ）Cutting
Sword and reamer（Ⅱ）Angle between cutting edge in obtuse angle, multiple-cutting-edge tip（Ⅲ）Cutting edge and reamer（Ⅱ）Cutting edge
Between angle and multiple-cutting-edge tip（Ⅲ）Cutting edge and inclination angle reamer（Ⅳ）Cutting edge between angle be acute angle；Apex point
Portion（Ⅰ）Two cutting edges in place pass through chisel edge（3）Connection.
2. the carbon fibre reinforced composite target drill according to claim 1 with straight sword type 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 straight sword type blade, its feature exist
In：Multiple-cutting-edge tip（Ⅲ）Cutting edge（6）With drill main body（1）The angle of axis is 60 °~85 °.
4. the carbon fibre reinforced composite target drill according to claim 1 with straight sword type blade, its feature exist
In：Inclination angle reamer（Ⅳ）Cutting edge（7）With drill main body（1）There is angle between axis（γ）, the angle is less than reaming
Portion（Ⅱ）Top angle half.
5. the carbon fibre reinforced composite target drill according to claim 1 with straight sword type blade, its feature exist
In：Drill main body（1）On two cutting edges normal rake（γ 0）For 0 °~15 °, normal relief angle（α 0）For 10 °~20 °.
6. the carbon fibre reinforced composite target drill according to claim 1 with straight sword type blade, its feature exist
In：Described chisel edge width（ΔL）For 0.5~1.5mm, the inclination angle of chisel edge（ζ）For 50 °~60 °.
7. the carbon fibre reinforced composite target drill according to claim 1 with straight sword type 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 |
|---|---|---|---|
| CN201711042733.1A CN107717020A (en) | 2017-10-31 | 2017-10-31 | Carbon fibre reinforced composite target drill with straight sword type blade |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711042733.1A CN107717020A (en) | 2017-10-31 | 2017-10-31 | Carbon fibre reinforced composite target drill with straight sword type blade |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107717020A true CN107717020A (en) | 2018-02-23 |
Family
ID=61202413
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711042733.1A Pending CN107717020A (en) | 2017-10-31 | 2017-10-31 | Carbon fibre reinforced composite target drill with straight sword type blade |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107717020A (en) |
Cited By (4)
| 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 |
| CN109108590A (en) * | 2018-09-25 | 2019-01-01 | 汇专科技集团股份有限公司 | A kind of manufacturing method of multiple-cutting-edge finishing tool |
| CN115570186A (en) * | 2022-11-21 | 2023-01-06 | 成都航威精密刃具有限公司 | Cutter and method for inhibiting carbon fiber hole making defects |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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| CN115570186A (en) * | 2022-11-21 | 2023-01-06 | 成都航威精密刃具有限公司 | Cutter and method for inhibiting carbon fiber hole making defects |
| CN115570186B (en) * | 2022-11-21 | 2023-04-18 | 成都航威精密刃具有限公司 | Cutter and method for inhibiting carbon fiber hole making defects |
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