CN107008952A - A kind of lamination thin plate drilling cutter with bradawl and counter boring chip breaking structure - Google Patents
A kind of lamination thin plate drilling cutter with bradawl and counter boring chip breaking structure Download PDFInfo
- Publication number
- CN107008952A CN107008952A CN201710405223.XA CN201710405223A CN107008952A CN 107008952 A CN107008952 A CN 107008952A CN 201710405223 A CN201710405223 A CN 201710405223A CN 107008952 A CN107008952 A CN 107008952A
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- CN
- China
- Prior art keywords
- counter boring
- drilling
- chip breaking
- ream
- breaking structure
- 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.)
- Granted
Links
- 238000005553 drilling Methods 0.000 title claims abstract description 80
- 238000003475 lamination Methods 0.000 title claims abstract description 28
- 238000005520 cutting process Methods 0.000 claims abstract description 22
- 241001074085 Scophthalmus aquosus Species 0.000 claims description 6
- 230000000977 initiatory effect Effects 0.000 claims description 3
- 229910000838 Al alloy Inorganic materials 0.000 description 7
- 229910001069 Ti alloy Inorganic materials 0.000 description 7
- 238000000034 method Methods 0.000 description 5
- 239000011229 interlayer Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002648 laminated material Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Drilling Tools (AREA)
Abstract
A kind of lamination thin plate drilling cutter with bradawl and counter boring chip breaking structure, including drilling portion, ream portion, counter boring portion and the handle of a knife set gradually, whole cutter are provided with two helicla flutes that ream portion and counter boring portion intersection are extended to from apex point；Drilling portion includes double tapered angle apex point and drilling work department, and drilling work department band is tapered, and double tapered angle apex point includes two sections of main cutting edges, and drilling work department includes the seamed edge extended out from apex point end；Ream portion includes two spiral edges extended out from drilling portion；Counter boring portion includes two main cutting edges and two helicla flutes for extending to handle of a knife, and two main cutting edges are in be provided with spiral chip breaking structure in cone angle, counter boring portion helicla flute.The cutter is by boring, the structure assembly of hinge, ream is on a cutter, lamination thin-slab structure is disposably completed to bore, cut with scissors, ream finishing, hole dimensional accuracy, coaxial accuracy and surface quality are improved, while processing efficiency is ensured, with good durability.
Description
Technical field
, can be in difficulty the present invention relates to a kind of brill processed suitable for the drilling of lamination thin plate precision, hinge, ream integrated tool
Ensure drilling precision during the drilling of rapidoprint such as aluminium alloy, titanium alloy and its lamination thin-slab structure, realize effective chip breaking
And chip removal, and certain tool stiffness is ensure that, belong to machining tool technical field.
Background technology
In order to reduce energy resource consumption, increase Aircraft life, the proportion that aluminium alloy is used with titanium alloy in aircraft is increasingly
It is high.In aircraft assembling process, aluminium alloy and titanium-alloy thin-plate are joined together to form laminated construction by conventional bolt and rivet
To strengthen performance, have complementary advantages.Accordingly, it would be desirable to process substantial amounts of connecting hole on aluminium alloy, titanium alloy and its lamination thin plate.For
Ensure drilling precision and form counter boring structure, each hole is required for boring, cut with scissors, three kinds of processing of ream.
But, because aperture is small, the features such as material difficulty of processing is big, axiality to lamination drilling requires high, so system
There is tool stiffness during hole and be difficult to ensure that card, the chip breaking of counter boring part are difficult, drilling precision is not high, the low problem of processing efficiency.
Therefore, during lamination thin plate drilling Tool Design proposed by the present invention, how to ensure tool stiffness, it is how real
Show the effective chip breaking in counter boring part, avoid chip from twining knife, the emphasis as research lamination thin plate drilling cutter.
The content of the invention
It is an object of the present invention to for problem present in existing lamination thin plate hole fabrication techniques, propose a kind of band bradawl
With the lamination thin plate drilling integrated tool of counter boring chip breaking structure, can be disposable to aluminium alloy, titanium alloy and its laminated construction
Brill, hinge, ream finishing are completed, the rigidity of cutter is improved by bradawl structure, ensures hole dimensional accuracy, coaxial accuracy and table
Face quality, while cone angle is effectively controlled the generation of interlayer spacings to the pressure of top plate in process.Pass through cutter ream
The chip breaking structure in nest portion ensures effective chip breaking during counter boring processing, it is to avoid chip twines cutter caused by knife and broken phenomenon, extension
Cutter life.Hole finishing of the present invention suitable for the lamination thin plate of thickness smaller (thickness is in 6mm~8mm).
The lamination thin plate drilling cutter with bradawl and counter boring chip breaking structure of the present invention, using following technical scheme：
The cutter, including drilling portion, ream portion, counter boring portion and the handle of a knife set gradually, whole cutter are provided with from apex point
Extend to two helicla flutes in ream portion and counter boring portion intersection；Drilling portion includes double tapered angle apex point and drilling work department, drilling
Work department band is tapered, and double tapered angle apex point includes two sections of main cutting edges, and drilling work department includes what is extended out from apex point end
Seamed edge；Ream portion includes two spiral edges extended out from drilling portion；Counter boring portion includes two main cutting edges and two are prolonged
The helicla flute of handle of a knife is extended, two main cutting edges are in be provided with spiral chip breaking structure in cone angle, counter boring portion helicla flute.
The helical angle of two helicla flutes that ream portion and counter boring portion intersection are extended to from apex point for 23 ° of dextrorotation~
30 °, to ensure Zhou Ren rigidity, intensity and chip removal performance.
The length in the drilling portion is 4mm~6mm.
The unbearable diameter of double tapered angle apex point is not less than 0.25 times of brill tip diameter in the drilling portion, and infiltrating also has one
Taper is determined, to ensure the rigidity of drill tool.
The first cone angle of double tapered angle apex point is 120 °~132 ° in the drilling portion, correspondence first paragraph main cutting edge；Second
Cone angle is 90 ° of correspondence second segment main cutting edges.
In the drilling portion outer most edge anterior angle of two sections of main cutting edges of double tapered angle apex point be 8 °~12 °, relief angle be 11 °~
15°。
The outer rim anterior angle γ 1 of the spiral edge in the ream portion is 5 °~10 °, and relief angle α 1 is 6 °~10 °, so that hinge
Cut more steady, it is ensured that cutter sharpness, durability and the precision in hole.
The length in the ream portion is 6mm~8mm.
The diameter in the ream portion is consistent with the end diameter of drilling work department in drilling portion.
A diameter of 8mm~the 10mm in counter boring portion, the outer rim anterior angle γ 2 in counter boring portion is 5 °~12 °.
The helical angle of the helicla flute in the counter boring portion is 30 °~35 ° of dextrorotation
The helical angle of the spiral chip breaking structure in the counter boring portion be 30 °~35 ° of dextrorotation, the diameter of chip breaking structure initiating terminal with
Ream portion diameter is consistent, and end diameter is identical with counter boring portion end diameter.
The present invention is by by the structure assemblies such as brill, hinge, ream and chip breaking structure a to cutter, realizing laminated material drilling
It is disposable to complete brill, hinge, ream processing, it is ensured that the precision and axiality of drilling；The bipyramid corner structure in drilling portion can effectively break
Bits, it is to avoid twine the generation of knife phenomenon；The cone angle in drilling portion can give top plate continuous, efficiently control interlayer gap
Generation；The constant diameter in ream portion, finishing effect is played to machined surface, crudy is improved, is that counter boring is processed
To support guide effect；The chip breaking structure in counter boring portion being capable of effectively chip breaking, it is ensured that preferable counter boring quality, reduces counter boring rank
What segment length's chip was caused twines knife phenomenon.
It is demonstrated experimentally that under the cooperation of appropriate process parameter, the present invention is drilled with more preferable drilling axial force than common fried dough twist
Distribution and more preferable durability.Suitable for the difficult-to-machine materials such as aluminium alloy, high temperature alloy, titanium alloy lamination thin-slab structure it is small
The drilling processing of diameter (being less than 6mm), being capable of effectively chip breaking, promotion chip removal, reduction interlayer gap, it is ensured that preferable cutter is resistance to
Expenditure, drilling quality and processing efficiency.
Brief description of the drawings
Fig. 1 is the overall structure diagram of the lamination thin plate drilling cutter of the invention with bradawl and counter boring chip breaking structure.
Fig. 2 is the axial, cross-sectional view of the apex point in drilling portion in the present invention.
Fig. 3 is the axial sectional diagrammatical view illustration in drilling portion in the present invention.
Fig. 4 is the diagrammatic cross-section of the radial direction in the counter boring portion comprising chip breaking structure in the present invention.
Fig. 5 is the chip breaking structure schematic front view in counter boring portion in the present invention.
In figure：1. drilling portion, 2. ream portions, 3. counter boring portions, 4. handle of a knifes, 5. counter boring portion chip breaking structures.
Embodiment
The lamination thin plate drilling cutter with bradawl and counter boring chip breaking structure of the present invention, material is hard alloy, its structure
As shown in figure 1, including the drilling portion 1 being sequentially connected, ream portion 2, counter boring portion 3 and handle of a knife 4.Whole cutter, which is provided with from apex point, to be prolonged
Two helicla flutes in ream portion and counter boring portion intersection are extended, the helical angle of helicla flute is 23 °~30 ° of dextrorotation, to ensure Zhou Ren
Rigidity, intensity and chip removal performance.
Drilling portion 1 includes double tapered angle apex point and drilling work department, and drilling work department band is tapered.For realize effective chip breaking and
Chip removal, the apex point of drilling portion 1 selection bipyramid corner structure, main cutting edge T1 and T2 of the double tapered angle apex point comprising two sections of equal lengths, two sections
Main cutting edge is symmetrical with respect to center line, referring to Fig. 2.First cone angleCorrespondence first paragraph main cutting edge T1,For 120 °~
132 °, optimal value is 120 °.Second segment cone angleCorrespondence second segment main cutting edge T2,For 90 °.Two sections of main cutting edge outermosts
The anterior angle of edge is 8 °~12 °, and relief angle is 11 °~15 °.Drilling work department includes the seamed edge extended out from point of a knife, drilling portion 1
Tip diameter D1 is bored, the end diameter of drilling work department is identical with the diameter in ream portion 2, is D2.Referring to Fig. 3, drilling portion two
End diameter (boring tip diameter D1 and the end diameter D2 of drilling work department) has together decided on drilling work with drilling work department length
Make the cone angle in portionThe unbearable diameter d1 (referring to Fig. 2) at apex point end is not less than 0.25D1, and unbearable taper (see Fig. 2) and work
Partial taper (see Fig. 3) is all mutuallyThis ensure that the rigidity in drilling portion.
Ream portion includes 2 helicla flutes and 2 spiral edges extended out from drilling portion.What 2 spiral edges were formed
Outer rim anterior angle γ 1 is 5 °~10 °, and relief angle α 1 is 6 °~10 °, so that ream is more steady, it is ensured that cutter sharpness, resistance to
Expenditure and the precision in hole.2 helicla flutes are extended out by drilling part.The diameter everywhere in ream portion is consistent, no cone angle.
One is provided with the right hand helix groove that counter boring portion 3 extends to handle of a knife 4 including two main cutting edges, two, helicla flute
Section chip breaking structure 5 (referring to Fig. 1).As shown in figure 4, to that should have flute, Zhou Ren and land on helicla flute.Two masters in counter boring portion 3
Cutting edge is in cone angleA diameter of D3 in counter boring portion 3.Cone angleAccording to the angle-determining of engine request.Before the outer rim in counter boring portion 3
Angle γ 2 is 5 °~12 °.The helical angle of chip breaking structure 5 is 30 °~35 ° of dextrorotation, and the initiating terminal diameter of chip breaking structure and ream portion are straight
Footpath is consistent, is D2, the end diameter of chip breaking structure is identical with counter boring portion end diameter, is 8mm~10mm.
Above-mentioned cutter is applied to the sheet pack of aluminium alloy and difficult-to-machine material (high strength steel, high temperature alloy, titanium alloy etc.)
Rotating fields precision system hole machined, disposably completes to bore, cuts with scissors, ream is finished, passing through effective chip breaking, promote row to lamination thin-slab structure
Bits, reduction interlayer gap, reduction drilling axial force, to improve hole dimensional accuracy, coaxial accuracy and surface quality, are ensureing
While processing efficiency, with good durability.
Claims (10)
1. a kind of lamination thin plate drilling cutter with bradawl and counter boring chip breaking structure, including set gradually drilling portion, ream portion,
Counter boring portion and handle of a knife, it is characterized in that：Whole cutter is provided with two spiral shells that ream portion and counter boring portion intersection are extended to from apex point
Spin slot；Drilling portion includes double tapered angle apex point and drilling work department, and drilling work department band is tapered, and double tapered angle apex point includes two sections of masters
Cutting edge, drilling work department includes the seamed edge extended out from apex point end；Ream portion includes two extended out from drilling portion
Individual spiral edge；Counter boring portion includes two main cutting edges and two helicla flutes for extending to handle of a knife, and two main cutting edges are in cone angle,
Spiral chip breaking structure is provided with counter boring portion helicla flute.
2. the lamination thin plate drilling cutter according to claim 1 with bradawl and counter boring chip breaking structure, it is characterized in that：It is described
The helical angle that ream portion and two helicla flutes of counter boring portion intersection are extended to from apex point is dextrorotation 23 °~30.
3. the lamination thin plate drilling cutter according to claim 1 with bradawl and counter boring chip breaking structure, it is characterized in that：It is described
0.25 times of the unbearable diameter of double tapered angle apex point not less than brill tip diameter in drilling portion.
4. the lamination thin plate drilling cutter according to claim 1 with bradawl and counter boring chip breaking structure, it is characterized in that：It is described
The first cone angle of double tapered angle apex point is 120 °~132 ° in drilling portion, correspondence first paragraph main cutting edge；Second cone angle is 90 ° of correspondences
Second segment main cutting edge.
5. the lamination thin plate drilling cutter according to claim 1 with bradawl and counter boring chip breaking structure, it is characterized in that：It is described
The outer most edge anterior angle of two sections of main cutting edges of double tapered angle apex point is 8 °~12 ° in drilling portion, and relief angle is 11 °~15 °.
6. the lamination thin plate drilling cutter according to claim 1 with bradawl and counter boring chip breaking structure, it is characterized in that：It is described
The outer rim anterior angle γ 1 of the spiral edge in ream portion is 5 °~10 °, and relief angle α 1 is 6 °~10 °.
7. the lamination thin plate drilling cutter according to claim 1 with bradawl and counter boring chip breaking structure, it is characterized in that：It is described
The diameter in ream portion is consistent with the end diameter of drilling work department in drilling portion.
8. the lamination thin plate drilling cutter according to claim 1 with bradawl and counter boring chip breaking structure, it is characterized in that：It is described
A diameter of 8mm~the 10mm in counter boring portion, the outer rim anterior angle γ 2 in counter boring portion is 5 °~12 °.
9. the lamination thin plate drilling cutter according to claim 1 with bradawl and counter boring chip breaking structure, it is characterized in that：It is described
The helical angle of the helicla flute in counter boring portion is 30 °~35 ° of dextrorotation.
10. the lamination thin plate drilling cutter according to claim 1 with bradawl and counter boring chip breaking structure, it is characterized in that：Institute
The helical angle for stating the spiral chip breaking structure in counter boring portion is 30 °~35 ° of dextrorotation, diameter and the ream portion diameter of chip breaking structure initiating terminal
Unanimously, end diameter is identical with counter boring portion end diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710405223.XA CN107008952B (en) | 2017-05-31 | 2017-05-31 | Laminated sheet hole-making cutter with taper drill and countersink chip breaking structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710405223.XA CN107008952B (en) | 2017-05-31 | 2017-05-31 | Laminated sheet hole-making cutter with taper drill and countersink chip breaking structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107008952A true CN107008952A (en) | 2017-08-04 |
| CN107008952B CN107008952B (en) | 2023-11-14 |
Family
ID=59451943
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710405223.XA Active CN107008952B (en) | 2017-05-31 | 2017-05-31 | Laminated sheet hole-making cutter with taper drill and countersink chip breaking structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107008952B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107900421A (en) * | 2017-12-27 | 2018-04-13 | 苏州阿诺精密切削技术有限公司 | For processing the ladder drilling reamer of aircraft skin rivet hole |
| CN108247115A (en) * | 2018-02-09 | 2018-07-06 | 广西汽车集团有限公司 | A kind of combined knife tool |
| CN111360301A (en) * | 2020-03-24 | 2020-07-03 | 上海拓璞数控科技股份有限公司 | Automatic hole-making dimple cutter suitable for weak rigidity equipment |
| US11278970B2 (en) | 2018-10-09 | 2022-03-22 | Milwaukee Electric Tool Corporation | Drill bit |
| US11407039B2 (en) | 2018-01-29 | 2022-08-09 | Milwaukee Electric Tool Corporation | Drill bit |
| CN114932252A (en) * | 2022-05-23 | 2022-08-23 | 大连理工大学 | Long-life CFRP and metal laminated structure's system hole cutter |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4507028A (en) * | 1981-09-26 | 1985-03-26 | Densaburo Sakai | Combined drill and reamer |
| CN102794486A (en) * | 2012-08-22 | 2012-11-28 | 浙江大学 | Compound tool applicable to high-speed and accurate holing on aircraft panel |
| CN105642972A (en) * | 2016-04-12 | 2016-06-08 | 山东大学 | Drilling-reaming-dimpling integrated cutting tool |
| CN106216743A (en) * | 2016-09-26 | 2016-12-14 | 山东大学 | A kind of double tapered angle chip-breaking drill bit |
| CN206139882U (en) * | 2016-11-10 | 2017-05-03 | 江西洪都商用飞机股份有限公司 | Helical angle stereoplasm such as compound integral type of two sharp cutting drills hinge ream close system spot facing cutter |
-
2017
- 2017-05-31 CN CN201710405223.XA patent/CN107008952B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4507028A (en) * | 1981-09-26 | 1985-03-26 | Densaburo Sakai | Combined drill and reamer |
| CN102794486A (en) * | 2012-08-22 | 2012-11-28 | 浙江大学 | Compound tool applicable to high-speed and accurate holing on aircraft panel |
| CN105642972A (en) * | 2016-04-12 | 2016-06-08 | 山东大学 | Drilling-reaming-dimpling integrated cutting tool |
| CN106216743A (en) * | 2016-09-26 | 2016-12-14 | 山东大学 | A kind of double tapered angle chip-breaking drill bit |
| CN206139882U (en) * | 2016-11-10 | 2017-05-03 | 江西洪都商用飞机股份有限公司 | Helical angle stereoplasm such as compound integral type of two sharp cutting drills hinge ream close system spot facing cutter |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107900421A (en) * | 2017-12-27 | 2018-04-13 | 苏州阿诺精密切削技术有限公司 | For processing the ladder drilling reamer of aircraft skin rivet hole |
| CN107900421B (en) * | 2017-12-27 | 2024-04-02 | 苏州阿诺精密切削技术有限公司 | Stepped drilling reamer for machining aircraft skin rivet holes |
| US11407039B2 (en) | 2018-01-29 | 2022-08-09 | Milwaukee Electric Tool Corporation | Drill bit |
| CN108247115A (en) * | 2018-02-09 | 2018-07-06 | 广西汽车集团有限公司 | A kind of combined knife tool |
| US11278970B2 (en) | 2018-10-09 | 2022-03-22 | Milwaukee Electric Tool Corporation | Drill bit |
| CN111360301A (en) * | 2020-03-24 | 2020-07-03 | 上海拓璞数控科技股份有限公司 | Automatic hole-making dimple cutter suitable for weak rigidity equipment |
| CN114932252A (en) * | 2022-05-23 | 2022-08-23 | 大连理工大学 | Long-life CFRP and metal laminated structure's system hole cutter |
| CN114932252B (en) * | 2022-05-23 | 2023-09-19 | 大连理工大学 | Long-life CFRP and metal laminated structure's hole making cutter |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107008952B (en) | 2023-11-14 |
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