CN106624080B - A kind of micro- tooth Double-margin brill ream one drill bit of ladder - Google Patents
A kind of micro- tooth Double-margin brill ream one drill bit of ladder Download PDFInfo
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- CN106624080B CN106624080B CN201611182140.0A CN201611182140A CN106624080B CN 106624080 B CN106624080 B CN 106624080B CN 201611182140 A CN201611182140 A CN 201611182140A CN 106624080 B CN106624080 B CN 106624080B
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- 241001074085 Scophthalmus aquosus Species 0.000 title description 7
- 238000005520 cutting process Methods 0.000 claims abstract description 90
- 238000012545 processing Methods 0.000 claims abstract description 35
- 230000004323 axial length Effects 0.000 claims description 3
- 238000009826 distribution Methods 0.000 claims description 3
- 238000005553 drilling Methods 0.000 abstract description 29
- 239000000463 material Substances 0.000 abstract description 26
- 229910000838 Al alloy Inorganic materials 0.000 abstract description 13
- 230000010354 integration Effects 0.000 abstract description 6
- 239000002648 laminated material Substances 0.000 abstract description 6
- 230000032798 delamination Effects 0.000 abstract description 2
- 229910052751 metal Inorganic materials 0.000 description 12
- 239000002184 metal Substances 0.000 description 12
- 239000004918 carbon fiber reinforced polymer Substances 0.000 description 10
- 238000003475 lamination Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 5
- 239000000835 fiber Substances 0.000 description 4
- 239000002131 composite material Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- 230000002929 anti-fatigue Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 239000003733 fiber-reinforced composite Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000011160 polymer matrix composite Substances 0.000 description 1
- 229920013657 polymer matrix composite Polymers 0.000 description 1
- 238000011160 research Methods 0.000 description 1
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- 229920005989 resin Polymers 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
Classifications
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- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Drilling Tools (AREA)
Abstract
The invention discloses a kind of micro- tooth Double-margins of ladder to bore ream one drill bit, and the drill bit is made of main cutting edge area, the areas ladder Wei Chi, end cutting edge area, spot-facing area, five parts of handle of a knife；Main cutting edge is grinding into Double Tops corner structure；There are multiple ladders in the areas ladder Wei Chi, and there are n micro- toothings for every grade of ladder；End cutting edge area includes two main chip spaces, and two secondary chip spaces form a pair of first end cutting edge and a pair of second end cutting edge；Spot-facing area forms four sword structures by four chip spaces.The micro- tooth Double-margin of ladder of the present invention bores ream integrated cutter in the multiple material of processing and aluminium alloy laminated material, the micro- tooth of multi-ladder can effective cut staple, reduce drilling axial force, reduce delamination damage, promote cutter chip breaking ability, reduce cut, Double-blade structure can promote processing efficiency, enhance chip removal ability, control chip flow, it realizes that high quality processing, final spot-facing sword can complete spot-facing processing request, realizes and bore ream integration processing.
Description
Technical field
The invention belongs to drilling tool technical fields in being machined, and it is high to be related to a kind of realization laminated material brill ream integration
The micro- tooth double-point tool of ladder of quality processing.
Background technology
Fibre reinforced composites have the excellent properties such as light weight, intensity is high, antifatigue, corrosion-resistant, aviation,
The multiple fields such as automobile are widely applied, if Air Passenger A350, BMW seven are all largely to use fibre reinforced in automobile
Polymer matrix composites (CFRP) material mitigates construction weight, improves fuel economy.However multiple material component interlayer direction is held
Loading capability is poor, cannot bear multidirectional complex load, therefore can only use lightweight, high-strength metal at some positions.In order to final
Assembly, multiple material and metal component, especially aluminium alloy element, generally use overlapped form forms laminated construction part, uses
In improving connecting portion intensity, and prevent bird from the shocks accident such as hitting.Such component at present mainly by the way of being connected, riveting into
Row mechanical connection, the premise of this connection type is must to carry out whole drilling.And the drilling quality direct relation of such component
To the assembling quality and service life of product.Since CFRP is made of fibre reinforced phase and resin matrix, material itself
Anisotropy, easy work in-process generates layering, burr equivalent damage, and tool wear is serious.And metal and CFRP material properties are poor
It is different big, even if such as this kind of metal material relatively easily processed of aluminium alloy, in processing with different from multiple material such as entrance hair
The defects of thorn, overlap, aperture is non-round or tilts, easily there is phenomena such as sticking knife in cutter, when processing two kinds of materials at the same time, cutting gold
Belong to the chip shape generated and the extremely difficult control of discharge path, easily scratch multiple material hole wall, leads to tearing, layering equivalent damage.Simultaneously
Since the cutting-tool angle suitable for processing multiple material and metal is inconsistent, existing cutter often occurs being difficult to match two kinds in drilling
Material and causing damages easy hair, and the problem that aperture precision is uncontrollable.As it can be seen that carbon fibre reinforced composite/metal laminated
The high quality entirety drilling of constitutional detail is extremely difficult, is one of the technical bottleneck in Aeronautics and Astronautics equipment manufacturing.
Research both at home and abroad finds that the different geometry of cutter will generate Different Effects to final CFRP drilling qualities, closes
The cutter structure of reason can effectively reduce drilling and answer the bending of the machining damages such as layering, the burr of material entrance and metal, turn round
It twists, crackle equivalent damage, and effectively improves cutter life.Domestic and international researcher has developed all kinds of for different structure progress
The drilling cutter of optimization, there is respective merits and demerits.Kawasaki, Japan heavy industry is sent out on " SAE Technical Paper "
Table《Development of a Drill Bit for CFRP/Aluminum-Alloy Stack:To Improve
Flexibility,Economical Efficiency and Work Environment》In propose a kind of hierarchic structure and bore
Lamination cutter, it is proposed that use relatively thin chisel edge, varied angle cutting edge and multi-step structure.This type cutter mainly uses sublevel
The thought of section drilling removes most of material by leading portion, ensures that removal efficiency, a small amount of material removal of back segment reduce metal and cut
Consider size to be worth doing, it is small to the damage influence of composite material and metal binding site.However this kind of cutter cannot be guaranteed in process
Multiple material burr effectively removes, and does not also account for the characteristic of multiple material rebound, it is difficult to ensure that the consistency of processing back aperture,
And ladder section is easy to wear, will influence drilling quality.Dalian University of Technology's Wang Fu Jis et al. develop a kind of " fiber-reinforced composite material
Expect the dedicated tool of efficient drilling ", patent No. CN201510508097, it by designing multistage ladder and multistage micro- toothing,
It step driling mode is equally used, can effectively reduce axial force, reduces damage, and generated by every grade of micro- tooth to remove
Drilling damages, and realizes multiple material high quality processing.However such double-point tool cutting output is still larger, may cause multiple material cutting damage
Beyond hole nominal diameter, or larger metal burr is generated, while weaker, workpiece machining surface is acted on to the finishing of finished surface
Finish is low, and without land at transitional edges, influences to become the ladder service life.One rake face of main cutting edge reconditioning, although being conducive to
The multiple material of cutting, but when cutting metal, it is unfavorable for chip flow and chip breaking.At the same time, in some processing technologys, there is spot-facing
The requirement of process can not achieve the requirement for boring ream integration processing without design spot-facing structure in above-mentioned patent.
Invention content：
Present invention mainly solves technical barrier be to overcome CFRP brills integrated with the laminated material progress that aluminium alloy forms
When ream end hole, CFRP easy damageds, aluminium alloy is also easy to produce burr, and the aperture consistency of two kinds of materials is poor, and finish is low, cutter life
Low problem invents a kind of micro- tooth Double-margin brill ream one away drill cuttings of ladder, is particularly suitable for CFRP in aluminium alloy laminated material
Integration bore ream end hole machined, which is a kind of to have multi-ladder, the brill ream integrated cutter of multi-tool edge structure, pairs at different levels
There is micro- toothing on cutting edge, can effectively realize that ream high quality end hole is bored in integration, ladder cutting region and spot-facing cutting edge are all
With land, the service life of drill bit can be improved, reduces use cost.
The technical solution adopted by the present invention is a kind of micro- tooth Double-margin brill ream one drill bit of ladder, characterized in that the drill bit
By main cutting edge area A, ladder Wei Chi area B, end cutting edge area C, five parts spot-facing area D, handle of a knife E form；The wherein micro- tooth of ladder
Area B is included in end cutting edge area C；
The main cutting edge of the main cutting edge area A has Double Tops corner structure：It is flat being grinding into close to the positions blade tip 1/3-1/2
Whole rake face 16, and form Double Tops corner structure, the first apex angle with another part main cutting edge rake face 17 formed by chip space
The angle of n1 is 102 ° -105 °, and the angle of the second apex angle n2 is 90 ° -95 °；
Ladder Wei Chi area B are using multistage hierarchic structure, and there are n micro- toothings for every grade of ladder；Nominal diameter is by knife
Point increases step by step to handle of a knife；Micro- tooth is around drill axis, and Spiral distribution on ladder end cutting edges at different levels, cut by every grade of ladder pair
The axial length of sword needs to ensure at least accommodate n micro- toothings, and n >=2, micro- tooth depth of ladders at different levels is in 0.8-1mm
Between, rudimentary micro- tooth need to use smaller groove depth, and be not up to and infiltrate herein；The apex angle γ values of micro- tooth afterbody ladder are
130°-140°；
The end cutting edge area C reconditionings go out the secondary chip spaces 18,19 of two main chip spaces 14,15 and two, form a pair of the
One end cutting edge and a pair of second end cutting edge；The bit diameter that main width of chip space d is 0.65-0.75 times, secondary chip removal groove width
It is 1/2-2/3 times of main width of chip space to spend e, end form the first end cutting edge 4 and the second end cutting edge 12 of a pair totally four in a pair
The helical rake angle β of cutting edge, the first end cutting edge is 14 ° -16 °, and the helical rake angle θ of the second end cutting edge is 3 ° -10 °, institute
The micro- tooth stated all is distributed on four blades.First and second end cutting edge reconditioning lands, width a, b 1-1.5mm, in spot-facing
2.5-3.5mm reconditionings have necking down below 9 blade tip of sword, and the single side size of necking down is 0.1-0.4mm, is not up to unbearable；
The spot-facing area D, which has, meets the apex angle ss of actual processing request, and four chip spaces form four spot-facing swords, and four
The anterior angle m1 of a spot-facing sword is 15 ° -25 °, and relief angle m2 is 25 ° -35 °, the equal reconditioning land of four cutting edges, and margin width c is
0.8-1.6mm；
The invention has the advantages that boring the multiple material of ream integrated cutter processing and aluminium conjunction using the micro- tooth Double-margin of multi-ladder
When golden laminated material, the micro- tooth of multi-ladder can effective cut staple, reduce drilling axial force, reduce delamination damage, promoted cutter
Chip breaking ability reduces cut, and Double-blade structure can promote processing efficiency, enhance chip removal ability, control chip flow, realize high-quality
Amount processing, final spot-facing sword can complete spot-facing processing request, realize and bore ream integration processing.
Description of the drawings
Fig. 1 is that a kind of micro- tooth Double-margin of ladder bores ream one drill bit front view, and Fig. 2 is apex point position partial enlargement in Fig. 1
Figure, Fig. 3 are that a kind of micro- tooth Double-margin of ladder bores ream one drill bit left view；Wherein：1. main cutting edge, 2. first order ladders are micro-
Tooth, the 3. micro- teeth of afterbody ladder, 4. first end cutting edges, 5. first end cutting edge, 4 reconditioning land, 6. cutter axial direction lines, 7.
Micro- 2 helix of tooth of first order ladder, micro- 3 helix of tooth of 8. afterbody ladders, 9. spot-facing cutting edges, 10. spot-facing cutting edge, 9 sword
The micro- 3 apex angle tangent line of tooth of 11. afterbody ladder of band, 12. second end cutting edges, 13. second end cutting edge, 12 reconditioning land, 14.
The main chip dividing groove of first spiral, the 15. second main chip dividing grooves of spiral, 16. main cutting edge, 1 rake face reconditioning first part, 17. main cuttings
1 rake face reconditioning second part of sword, 18. first screw pair chip dividing grooves, 19. second screw pair chip dividing grooves；A main cutting edges area, B ranks
The areas Ti Weichi, C end cutting edges area, D spot-facings area, E handle of a knifes；A. 5 width of the first end cutting edge reconditioning land, the second end cutting edges of b.
12 width of reconditioning land, 10 width of c. spot-facing cutting edges band, main 14,15 width of chip dividing groove of d., 18,19 width of e. pairs chip dividing groove,
α the first end cutting edge helical rake angles, 9 inclination angle theta of β spot-facings cutting edge, the second end cutting edge helical rake angle, γ afterbody ranks
The micro- addendum angle tangent line of ladder and cutter axial direction wire clamp angle, the big apex angle tangent line of n1. main cutting edges and cutter axial direction wire clamp angle, n2. master cut
The big apex angle tangent line of sword and cutter axial direction wire clamp angle are cut, m1. is spot-facing angle of cutting edge, and m2. is spot-facing edge clearance angle.
Specific implementation mode：
Below in conjunction with the accompanying drawings with the technical solution specific implementation that the present invention will be described in detail.
A kind of micro- tooth Double-margin of ladder as shown in Figure 1, Figure 2, Figure 3 shows bores ream one drill bit, and the drill bit can be divided into main cutting
Sword area (A), the areas ladder Wei Chi (B), end cutting edge area (C), spot-facing area (D), five parts of handle of a knife (E), the wherein areas ladder Wei Chi B
Included in end cutting edge area C.Cutter is cut by the micro- toothing of ladder and Double-margin, effectively reduce in processing CFRP and
The axial force generated when the laminated material of aluminium alloy composition, Tool in Cutting performance in raising, the damage and aluminium for reducing CFRP are closed
The metal burr that gold generates, effectively improves processing quality, extends cutter life.
In this example, the main cutting edge of the main cutting edge area A is grinding into smooth rake face close to 1/3 position of blade tip
16, and Double Tops corner structure is formed with another part main cutting edge rake face 17 formed by chip space, the first top of main cutting edge
The angle of angle n1 chooses 102 °, and the angle of the second apex angle n2 of main cutting edge is chosen for 90 degree, is used in ladder Wei Chi area B
Multistage hierarchic structure, nominal diameter increase step by step from point of a knife to handle of a knife；Micro- tooth is around drill axis, and Spiral distribution is in ladders at different levels
On end cutting edge, the axial length needs of every grade of ladder end cutting edge ensure at least accommodate n micro- toothings, n >=2, respectively
Micro- tooth depth of grade ladder is chosen for 0.8mm, and rudimentary micro- tooth is not up to when using 0.8mm groove depths to infiltrate herein, can ensure
Rigidity requirement.The apex angle γ values of afterbody ladder choose 130 °.The end cutting edge area C reconditionings go out two main chip spaces and two
A pair chip space, main width of chip space value are 3mm, and secondary width of chip space value is 1mm, can improve chip removal ability, ensures processing
Quality, and totally four cutting edges, the first pair are cut for a pair of first end cutting edge of formation and a pair of second end cutting edge on this basis
The helical rake angle β for cutting sword is chosen for 14 °, and the helical rake angle θ of the second end cutting edge is chosen for 3 °.Micro- tooth is all distributed in four
On a blade.First and second end cutting edge reconditioning lands, it is 1mm to choose its width.It is repaiied at 2.5mm below the spot-facing sword blade tip
Mill has necking down, the single side size of necking down to choose 0.1mm, can meet and be not up to unbearable requirement, ensures tool stiffness, reduces and add
Aperture error caused by work vibration.The spot-facing area D has the apex angle ss for meeting actual processing request, and β etc. is chosen in this example
In 100 °, four chip spaces form four spot-facing swords, and the anterior angle m1 selected values of four spot-facing swords are 15 °, and relief angle m2 values are 25 °.
The equal reconditioning land of four cutting edges, margin width c are set to 0.8mm, it is ensured that the sharp degree and rigidity of blade.
The drill bit of the present invention is drilling tool #1, and commercially available drill bit is drilling tool #2, using identical technological parameter and clamping side
The processing hole matter of multiple material plate and aluminium alloy plate exit face and inlet face is observed in formula, 20 holes of continuous drilling after drilling terminates
Amount, and chip breaking effect in process is observed, as a result it is described as follows：
(1) exit hole quality
There is small lamination when processing first hole using drilling tool #2, with the progress of processing, multiple material plate layering is existing
As gradually aggravating, and aluminium alloy plate starts macroscopic burr occur at the 5th hole.Using the 20 of drilling tool #1 processing
A hole does not have lamination generation, and macroscopic burr not yet occurs in completion of processing and tearing damages, and processing quality is obviously excellent
In drilling tool #2.
(2) ingate quality
First Kong Shifu material plate entrance is processed using drilling tool #2 and small lamination occurs, with the progress of processing,
Lamination is gradually aggravated, and aluminium alloy plate starts macroscopic burr occur at the 5th hole.It is processed using drilling tool #1
20 holes there is no a lamination generation, not yet there is macroscopic burr in completion of processing and tearing damages, and processing quality is bright
It is aobvious to be better than drilling tool #2.
(3) chip breaking effect
When being processed using drilling tool #2, after drill bit starts to cut aluminum alloy plate, it will produce a large amount of long chips and be entangled on cutter,
And in the case where not using artificial chip breaking, cutter can not voluntarily chip breaking, chip scratch workpiece surface, generate apparent cut.
When being processed using drilling tool #1, it can voluntarily be cut off by cutter when chip winds lesser amt on cutter, workpiece will not be scratched
Surface, processing quality are more preferable.
(4) cutter life
Drilling tool #2 has answered material plate after processing the 3rd hole and has produced apparent lamination, further serious later, and aluminium
Alloy sheets entrance, which goes out, will produce a large amount of metal burrs, and bit life is shorter.And drilling tool #1 process behind 20 holes quality still compared with
It is good, it is seen that drilling tool #1 has longer cutter life.
Claims (1)
1. a kind of micro- tooth Double-margin of ladder bores ream one drill bit, characterized in that the drill bit is by main cutting edge area (A), the micro- tooth of ladder
Area (B), end cutting edge area (C), spot-facing area (D), five parts of handle of a knife (E) form；Wherein the areas ladder Wei Chi (B) is cut included in pair
In the areas Xiao Ren (C)；
The main cutting edge of the main cutting edge area (A) has Double Tops corner structure：It is smooth being grinding into close to the positions blade tip 1/3-1/2
Rake face (16), and Double Tops corner structure is formed with another part main cutting edge rake face (17) formed by chip space, the first top
The angle at angle (n1) is 102 ° -105 °, and the angle of the second apex angle (n2) is 90 ° -95 °；
The areas the ladder Wei Chi (B) are using multistage hierarchic structure, and there are n micro- toothings for every grade of ladder；Nominal diameter is by point of a knife
To handle of a knife, increase step by step；Micro- tooth is around drill axis, and Spiral distribution is on ladder end cutting edges at different levels, every grade of ladder end cutting edge
Axial length need to ensure at least accommodate n micro- toothings, n >=2, micro- tooth depths of ladders at different levels 0.8-1mm it
Between, rudimentary micro- tooth need to use smaller groove depth, and be not up to and infiltrate herein；Apex angle (γ) value of micro- tooth afterbody ladder is
130°-140°；
The end cutting edge area C reconditionings go out two main chip spaces (14) (15) and two secondary chip spaces (18) (19), are formed a pair of
First end cutting edge and a pair of second end cutting edge；The bit diameter that main width of chip space (d) is 0.65-0.75 times, secondary chip removal
The main width of chip space that well width (e) is 1/2-2/3 times forms a pair of first end cutting edge (4) and a pair of second end cutting edge
(12) helical rake angle (β) of totally four cutting edges, the first end cutting edge is 14 ° -16 °, the helical rake angle (θ) of the second end cutting edge
It it is 3 ° -10 °, micro- tooth is all distributed on four cutting edges；First and second end cutting edge reconditioning lands, margin width
(a) (b) is 1-1.5mm, has necking down in the lower section 2.5-3.5mm reconditionings of spot-facing sword (9) blade tip, the single side size of necking down is 0.1-
0.4mm is not up to unbearable；
The spot-facing area (D), which has, meets the apex angle (β) of actual processing request, and four chip spaces form four spot-facing swords, and four
The anterior angle (m1) of a spot-facing sword is 15 ° -25 °, and relief angle (m2) is 25 ° -35 °, the equal reconditioning land of four cutting edges, margin width
(c) it is 0.8-1.6mm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611182140.0A CN106624080B (en) | 2016-12-20 | 2016-12-20 | A kind of micro- tooth Double-margin brill ream one drill bit of ladder |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611182140.0A CN106624080B (en) | 2016-12-20 | 2016-12-20 | A kind of micro- tooth Double-margin brill ream one drill bit of ladder |
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| CN106624080B true CN106624080B (en) | 2018-10-16 |
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| WO2019213888A1 (en) * | 2018-05-10 | 2019-11-14 | 大连理工大学 | Vertical blade double-ladder micro-tooth tool for perforating composite material and laminated structure thereof with high quality |
| CN108608040B (en) * | 2018-05-10 | 2020-04-07 | 大连理工大学 | Vertical-edge double-step micro-tooth cutter for high-quality hole making of composite material and laminated structure of composite material |
| CN114713884B (en) * | 2020-12-22 | 2023-05-26 | 上海飞机制造有限公司 | Ultrasonic vibration drilling tool |
| CN113319333A (en) * | 2021-07-16 | 2021-08-31 | 哈尔滨理工大学 | CFRP (carbon fiber reinforced plastics) hole-making twist drill |
| 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 |
| CN115213465B (en) * | 2022-07-15 | 2023-08-04 | 大连理工大学 | Hole making cutter suitable for aramid fiber composite material and design method |
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Also Published As
| Publication number | Publication date |
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| CN106624080A (en) | 2017-05-10 |
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