CN105499661B - The dagger of the right sword of left-hand screw bores - Google Patents
The dagger of the right sword of left-hand screw bores Download PDFInfo
- Publication number
- CN105499661B CN105499661B CN201610021563.8A CN201610021563A CN105499661B CN 105499661 B CN105499661 B CN 105499661B CN 201610021563 A CN201610021563 A CN 201610021563A CN 105499661 B CN105499661 B CN 105499661B
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- China
- Prior art keywords
- sword
- conical surface
- knife
- handle
- hand screw
- 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.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B51/00—Tools for drilling machines
- B23B51/0018—Drills for enlarging a hole
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2251/00—Details of tools for drilling machines
- B23B2251/04—Angles, e.g. cutting angles
- B23B2251/043—Helix angles
- B23B2251/046—Variable
Abstract
A kind of dagger of right sword of left-hand screw bores,It includes the drill bit being coaxially sequentially connected and handle of a knife,Drill bit includes the blade part of 26 central axis annular array settings in left-hand screw shape and around handle of a knife,A chip area for being in left-hand screw shape is surrounded out between the circumferentially-adjacent blade part of each two,Blade part includes end conical surface sword,Spiral helicine all swords and the second conical surface sword between end conical surface sword and Zhou Ren,The right side wall of chip area is end conical surface sword,The rake face of all swords and the second conical surface sword,It is circular cone cutting face that end conical surface sword rotates the cutting face to be formed around the central shaft of handle of a knife,And the drift angle in circular cone cutting face is 118 ° 122 °,Zhou Ren is the circumferential cutting edge of helically wire,Intersect respectively with end conical surface sword and all swords at the axial both ends of second conical surface sword,Second conical surface sword is 7.5 ° 8.5 ° around the semiapex angle that the central shaft of handle of a knife rotates the circular cone cutting face to be formed.
Description
Technical field
The present invention relates to drilling cutter field, the dagger for particularly relating to a kind of right sword of left-hand screw bores.
Background technology
Currently, domestic and international general-purpose aircraft uses composite more and more, answering particularly on cubpiston
With more extensive.Wing (including spar, stringer and covering), fuselage, empennage, covering, fuel tank, the enging cabin of aircraft are all adopted
With composite, and drilling is one of most important manufacturing procedure in fibre reinforced composites manufacturing process.
Because fibre reinforced composites are increased by the big fiber of the soft and tough matrix material of matter and intensity height, hardness
The two-phase or heterogeneous structure material that strong material mixes, its anisotropy, low-thermal conductivity, low interfacial bonding strength make its into
For typical difficult-to-machine material.Widely used composite is broadly divided into glass fiber compound material in producing now and carbon is fine
Composite is tieed up, and that high intensity, high rigidity, anti-fatigue performance possessed by carbon fibre composite are good, heat-resisting quantity is good etc. is excellent
Point, make it that there is more preferable advantage and application in airplane design, manufacture.With the extensive use of carbon fiber, consequently also bring
Carbon fibre composite is the processing and fit on the problem of.Now, more highlighted the shortcomings that carbon fibre composite,
Become drilling, the subject matter source of assembling.Mainly overcome carbon fibre composite knot when carbon fibre composite drills
The problems such as the high intensity of structure, high rigidity, poor thermal conductivity, anisotropy, interlaminar strength be low, therefore, in fibre reinforced composites
During drilling, except traditional metal materials drilling defect (scale error, deviation from circular from, site error and error of perpendicularity etc.)
Outside, layering, gateway tear are also embodied by with burr, hole wall surface spike protein gene etc..
As intelligence makes the 2nd .3 in " selection scheme of carbon fiber composite material hand-made hole cutter and instrument " announced on the net
.1 a kind of straight sword dagger for saving proposition bores, and refers to link " http://www .idnovo .com .cn/zhizao/show
.php itemid=26312 ", it is small that this straight sword dagger drilled through the subdrilling on carbon fibre material of the step-like drill bit of some levels
Hole, then the mode of gradual reaming overcome the high intensity of carbon fiber board, high rigidity, poor thermal conductivity, anisotropy, interlaminar strength
Low problem, also overcomes the problem of traditional right-hand screw drill bit entrance peels off layering, but the mode of this stepped reaming,
Due to being used for the next stage conoid end sword of reaming on drill bit due to having between big, the adjacent two-stage conical surface end sword of corner angle
The circumference sword crossed, still easily makes drill bit cause vertical impact to carbon fiber, causes outlet layering, tear to form burr；And
Because the cutting angle of cutting edge that this straight sword dagger bores is 0, chip breaking ability, therefore still easily make hole wall surface spike protein gene.
The content of the invention
The present invention provides a kind of dagger of the right sword of left-hand screw and bored, and its technical problem underlying to be solved is：Traditional use
Bored in the dagger of drilling on the fibre reinforced composites such as carbon fiber board and carry out perforate, reaming, then profit using stair-stepping drill bit
Milling is carried out to hole wall with circumferential cutting edge, but stair-stepping drill bit easily shakes in different phase transition, and then produce
Axial impact, cause outlet layering, export situations such as tear forms burr, and the anterior angle of the circumferential cutting edge of this straight line is
0, therefore chip breaking is indifferent, cutter easily shakes, and makes hole wall surface spike protein gene.
In view of the shortcomings of the prior art, the present invention provides a kind of dagger of the right sword of left-hand screw and bored, and it includes coaxially successively connecting
The drill bit and handle of a knife connect, the drill bit include 2-6 in left-hand screw shape and around the central axis circular array of the handle of a knife
The blade part set is arranged, a chip area for being in left-hand screw shape, the blade are surrounded out between the circumferentially-adjacent blade part of each two
Portion include end conical surface sword, spiral helicine all swords and between the end conical surface sword and Zhou Ren for reaming transition the
Two conical surface swords, the right side wall of the chip area are the rake face of the end conical surface sword, all swords and the second conical surface sword, the end
The cutting face that portion's conical surface sword is rotated in the leading section formation of the drill bit around the central shaft of the handle of a knife is circular cone cutting face, and
The drift angle in the circular cone cutting face is 118 ° -122 °, and the Zhou Ren is that the rake face intersects with the external cylindrical surface of the drill bit
The circumferential cutting edge of the helically wire formed, the axial both ends of second conical surface sword respectively with the end conical surface sword and
All swords intersect, and the semiapex angle that second conical surface cutting edge rotates the circular cone cutting face to be formed around the central shaft of the handle of a knife is
7.5°-8.5°；The quantity of the blade part is even number, and two of which is centrosymmetric with the central axis of the handle of a knife, other
End conical surface sword on blade part is removed, on the blade part that above-mentioned two is centrosymmetric with the central axis of the handle of a knife
The land of chisel edge is formed between the conical surface sword of end, its margin width is 0.04-0.08mm.
It is preferable over：The helical angle of the blade part and chip area is 4 °, the Zhou Ren of helically wire helical angle
For 4 °.
It is preferable over：The end conical surface sword is crossed to form on the diameter at point of a knife and the drill bit with second conical surface sword
The corresponding diameter ratio positioned at section where the Zhou Ren is 140/359, and the length of the drill bit is 50-50.5mm.
It is preferable over：The lanyard that width is 0.1-0.15mm, the end are offered on the rear knife face of the end conical surface sword
Relief angle corresponding to the rear knife face of portion's conical surface sword be 20 ° -24 °, damping relief angle corresponding to the lanyard of the end conical surface sword be 8 ° -
10°。
It is preferable over：The width of the major first flank of second conical surface sword is 0.45-0.55mm, relief angle is 25 ° -30 °, institute
The major first flank for stating the second conical surface sword is provided with the lanyard that width is 0.15-0.2mm, damping relief angle is 14 ° -16 °, described
The relief angle of knife face is 40 ° after the second of second conical surface sword.
It is preferable over：The anterior angle of the Zhou Ren is 19 ° -21 °, rear knife face width is 0.35-0.45mm, relief angle is 23 ° -27 °,
The a width of 0.15-0.2mm of land.
It is preferable over：The bottom land angle of the chip area is rounding corner structure, and the rounding of the bottom land angle of the chip area
Angular radius is not more than 0.2mm.
It is preferable over：The end conical surface sword, all swords and the rake face of the second conical surface sword and the surface roughness of rear knife face
No more than 0.2 micron, the surface roughness of the left side wall in the chip area is no more than 0.4 micron, the end conical surface sword with
The circle run-out tolerance that second conical surface sword is crossed to form at point of a knife is no more than 0.01mm, and the circle jump degree of the end conical surface sword is public
Difference is no more than 0.01mm.
It is preferable over：A diameter of 4mm of the handle of a knife, the drill bit are shaped on the handle of a knife, the drill bit together with
The total length of the handle of a knife is 80-80.5mm, and the cylindricity tolerance of the handle of a knife is no more than 4 microns, that roundness tolerance is no more than 2 is micro-
Rice, surface roughness are 0.4 micron.
Compared with prior art, the beneficial effects of the invention are as follows：
First, using end conical surface sword perforate on composite panel, then second conical surface sword device to hole progress is passed through
Reaming, it is the reaming that 7.5 ° -8.5 ° of second conical surface sword can be gentle by semiapex angle, and is unlikely to composite panel
Vertical impact is caused, eliminates the phenomenon of the drilling outlet layering of composite panel；
2nd, it is the right sword of left-hand screw because the dagger of the present invention bores, therefore in drilling, rake face will not be to the entrance of drilling
Screw lifting power is produced, therefore the screw lifting effect for effectively solving traditional right-hand screw drill bit causes the system of composite panel
The phenomenon of layering is peeled off in hole porch, because the left-hand screw of the present invention only has 4 °, and the cutting swarf of composite be it is powdered, because
This does not interfere with normal chip removal；
3rd, the chip area left-hand screw is utilized so that the rake face of the Zhou Ren obtains one 19 ° -21 ° of anterior angle, enters
And the chip breaking ability of cutting edge is effectively increased, it can prevent cutter from moving, the situation of hole wall surface spike protein gene.
Brief description of the drawings
The dagger that Fig. 1 is the present invention bores dimensional structure diagram.
Fig. 2 is the radial direction section structure diagram of all blades of drill bit of the present invention
Fig. 3 is the chip area local section structural representation of the present invention
All edge clearance angle structural parameters that Fig. 4 is the present invention mark schematic diagram
Fig. 5 is the structural representation of the end conical surface sword of the present invention
Fig. 6 is that the structural parameters of the end conical surface sword of the present invention mark schematic diagram
Fig. 7 is that the structural parameters of the second conical surface sword of the present invention mark schematic diagram
Embodiment
A kind of dagger of right sword of left-hand screw proposed by the present invention is bored below with reference to accompanying drawing 1 to 7 and preferred embodiment
It is described in greater detail.
The present invention provides a kind of dagger of the right sword of left-hand screw and bored, and it includes the drill bit 1 being coaxially sequentially connected and handle of a knife 2,
The drill bit 1 includes 2-6 (preferably 4, as shown in Figure of description is 4) in left-hand screw shape and surrounds the knife
The blade part that the central axis annular array of handle 2 is set, it is in left-hand screw to surround out one between the circumferentially-adjacent blade part of each two
The chip area 11 of shape, the blade part include end conical surface sword 12, spiral helicine all swords 13 and positioned at the end conical surface swords
It is used for the second conical surface sword 14 of reaming transition between 12 and all swords 13, the right side wall of the chip area 11 is the end conical surface sword
12nd, the rake face 15 of all conical surface swords 14 of sword 13 and second, the end conical surface sword 12 rotate around the central shaft of the handle of a knife 2
Be circular cone cutting face in the cutting face that the leading section of the drill bit 1 is formed, and the drift angle in the circular cone cutting face for 118 °-
122 °, the circumference for the helically wire that all swords 13 are crossed to form for the external cylindrical surface of the rake face 15 and the drill bit 1
Cutting edge, the axial both ends of second conical surface sword 14 are intersected with the end conical surface sword 12 and all swords 13 respectively, and described
Two conical surface cutting edges 14 are 7.5 ° -8.5 ° around the semiapex angle that the central shaft of the handle of a knife 2 rotates the circular cone cutting face to be formed.
Preferred embodiment：The helical angle of the blade part and chip area 11 is 4 °, all swords 13 of the helically wire
Helical angle be 4 °, the anterior angles of all swords 13 is 19 ° -21 °, rear knife face width is 0.35-0.45mm, relief angle is 23 ° -27 °,
The a width of 0 .15-0 .2mm of land.
Preferred embodiment：The end conical surface sword is crossed to form diameter and the brill at point of a knife with second conical surface sword
The corresponding diameter ratio positioned at section where the Zhou Ren is 140/359 on head, and the length of the drill bit 1 is 50-50.5mm, described
The top of drill bit 1 to the length diametrically projected between the tail end of all swords 13 is 35-35.5mm, right on the drill bit 1
A diameter of 3 .585-3.595mm of all place sections of sword 13 should be located at, the recess diameter of the drill bit 1 is 3.48-
3.5mm, the end conical surface sword 12 are crossed to form a diameter of 1.37-1 .43mm at point of a knife with second conical surface sword 14.
Preferred embodiment：As shown in Fig. 1,2,5, the quantity of the blade part is that (the blade part quantity in figure is 4 to even number
It is individual), two of which is centrosymmetric with the central axis of the handle of a knife 2, and the end conical surface sword 12 on other blade parts is cut
Remove, chisel edge is formed between the blade part upper end conical surface sword 12 that above-mentioned two is centrosymmetric with the central axis of the handle of a knife 2
Land, its margin width is 0.04-0.08mm, can effectively realize that drilling is positioned and subtracted using the small margin width of chisel edge
To the axial impact of composite fiber plate during small drilling.
Preferred embodiment：The lanyard that width is 0.1-0.15mm is offered on the rear knife face of the end conical surface sword 12,
Relief angle corresponding to the rear knife face of the end conical surface sword 12 is 20 ° -24 °, is subtracted corresponding to the lanyard of the end conical surface sword 12
It is 8 ° -10 ° to shake relief angle.
Preferred embodiment：The width of the major first flank of second conical surface sword 14 is 0 .45-0 .55mm, relief angle is
25 ° -30 °, the major first flank of second conical surface sword 14 provided with width is 0 .15-0 .2mm, damping relief angle be 14 ° -
16 ° of lanyard, second conical surface sword 14 second after the relief angle of knife face be 40 °, and then after ensureing two between knife face
Angle drop.
Preferred embodiment：The angle that the left side wall of the chip area 11 is crossed to form with right side wall is 90 °, and bottom land angle
For rounding corner structure, and the rounding radii of the bottom land angle of the chip area 11 is not more than 0 .2mm, the chip area 11
It is 1 .4-1 .5mm that bottom land skirt rotates the column diameter to be formed around the central axis of drill bit 1.
Preferred embodiment：The end conical surface sword 12, the rake face 15 of the conical surface sword 14 of all swords 13 and second and rear knife face
Surface roughness be no more than 0 .2 microns, the surface roughness of the left side wall in the chip area 11 is no more than 0 .4 microns,
The end conical surface sword 12 is no more than 0 .01mm, institute with the circle run-out tolerance that second conical surface sword 14 is crossed to form at point of a knife
The circle jump degree tolerance for stating end conical surface sword 12 is no more than 0 .01mm.
Preferred embodiment：A diameter of 4mm of the handle of a knife 2, the drill bit 1 are shaped on the handle of a knife 2, the brill
First 1 together with the total length of the handle of a knife 2 is 80-80 .5mm, and the cylindricity tolerance of the handle of a knife 2 is no more than 4 microns, roundness tolerance
It is 0 .4 microns no more than 2 microns, surface roughness.
Described in synthesis, technical scheme can be with sufficiently effective completion foregoing invention purpose, and the present invention
Structural principle and the principle of work and power have all sufficiently been verified in embodiment, and can reach the effect of expected and purpose, and
Embodiments of the invention can also enter line translation according to these principles, and therefore, the present invention includes all in claim
All replacement contents in the range of being previously mentioned.Any equivalence changes made in scope of the present invention patent, all belong to this case
Within the scope of the claims of application.
Claims (9)
1. a kind of dagger of right sword of left-hand screw bores, it includes the drill bit being coaxially sequentially connected and handle of a knife, it is characterised in that：It is described
Drill bit includes the blade part of the 2-6 central axis annular array settings in left-hand screw shape and around the handle of a knife, each two
A chip area for being in left-hand screw shape is surrounded out between circumferentially-adjacent blade part, the blade part includes end conical surface sword, spiral
All swords of shape and the second conical surface sword for being used for reaming transition between the end conical surface sword and Zhou Ren, the chip area
Right side wall is the rake face of the end conical surface sword, all swords and the second conical surface sword, and the end conical surface sword surrounds the handle of a knife
Central shaft to be rotated in the cutting face that the leading section of the drill bit is formed be circular cone cutting face, and the drift angle in the circular cone cutting face
For 118 ° -122 °, the Zhou Ren is the circle for the helically wire that the external cylindrical surface of the rake face and the drill bit is crossed to form
All cutting edges, the axial both ends of second conical surface sword are intersected with the end conical surface sword and all swords respectively, second cone
Face cutting edge is 7.5 ° -8.5 ° around the semiapex angle that the central shaft of the handle of a knife rotates the circular cone cutting face to be formed；The blade
The quantity in portion is even number, and two of which is centrosymmetric with the central axis of the handle of a knife, the end conical surface on other blade parts
Sword is removed, and is formed between the blade part upper end conical surface sword that above-mentioned two is centrosymmetric with the central axis of the handle of a knife
The land of chisel edge, its margin width are 0.04-0.08mm.
2. a kind of dagger of the right sword of left-hand screw according to claim 1 bores, it is characterised in that：The blade part and chip removal
The helical angle of groove is 4 °, and the Zhou Ren of helically wire helical angle is 4 °.
3. a kind of dagger of the right sword of left-hand screw according to claim 2 bores, it is characterised in that：The end conical surface sword and institute
State the second conical surface sword and be crossed to form the diameter ratio positioned at section where the Zhou Ren corresponding with the drill bit of the diameter at point of a knife
For 140/359, the length of the drill bit is 50-50.5mm.
4. a kind of dagger of the right sword of left-hand screw according to claim 1 bores, it is characterised in that：After the end conical surface sword
Offered on knife face width be 0.1-0.15mm lanyard, relief angle corresponding to the rear knife face of the end conical surface sword be 20 °-
24 °, damping relief angle corresponding to the lanyard of the end conical surface sword is 8 ° -10 °.
5. a kind of dagger of the right sword of left-hand screw according to claim 4 bores, it is characterised in that：After the first of second conical surface sword
The width of knife face is 0 .45-0 .55mm, relief angle is 25 ° -30 °, and the major first flank of second conical surface sword is provided with width
For 0 .15-0 .2mm, the lanyard that damping relief angle is 14 ° -16 °, second conical surface sword second after the relief angle of knife face be
40°。
6. a kind of dagger of the right sword of left-hand screw according to claim 5 bores, it is characterised in that：The anterior angle of the Zhou Ren is
19 ° -21 °, rear knife face width be 0 .35-0 .45mm, relief angle is 23 ° -27 °, a width of 0 .15-0 .2mm of land.
7. a kind of dagger of the right sword of left-hand screw according to claim 6 bores, it is characterised in that：The bottom land folder of the chip area
Angle is rounding corner structure, and the rounding radii of the bottom land angle of the chip area is not more than 0 .2mm.
8. a kind of dagger of the right sword of left-hand screw according to claim 7 bores, it is characterised in that：The end conical surface sword, week
The surface roughness of the rake face and rear knife face of sword and the second conical surface sword is no more than 0.2 micron, the left side in the chip area
The surface roughness of wall is no more than 0 .4 microns, and the end conical surface sword is crossed to form the circle at point of a knife with second conical surface sword
Run-out tolerance is no more than 0 .01mm, and the circle jump degree tolerance of the end conical surface sword is no more than 0 .01mm.
9. a kind of dagger of the right sword of left-hand screw according to claim 8 bores, it is characterised in that：The handle of a knife it is a diameter of
4mm, the drill bit are shaped on the handle of a knife, and the drill bit is 80-80.5mm together with the total length of the handle of a knife, the knife
The cylindricity tolerance of handle is 0.4 micron no more than 2 microns, surface roughness no more than 4 microns, roundness tolerance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610021563.8A CN105499661B (en) | 2016-01-13 | 2016-01-13 | The dagger of the right sword of left-hand screw bores |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610021563.8A CN105499661B (en) | 2016-01-13 | 2016-01-13 | The dagger of the right sword of left-hand screw bores |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105499661A CN105499661A (en) | 2016-04-20 |
| CN105499661B true CN105499661B (en) | 2017-11-21 |
Family
ID=55708172
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610021563.8A Active CN105499661B (en) | 2016-01-13 | 2016-01-13 | The dagger of the right sword of left-hand screw bores |
Country Status (1)
| Country | Link |
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| CN (1) | CN105499661B (en) |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0747243B2 (en) * | 1987-06-05 | 1995-05-24 | 富士重工業株式会社 | Drills for drilling composite materials |
| CN2654264Y (en) * | 2003-12-05 | 2004-11-10 | 西安飞机工业（集团）有限责任公司 | Drill having conical transition region |
| GB0606620D0 (en) * | 2006-04-01 | 2006-05-10 | Technicut Ltd | Drill bit |
| KR20120089685A (en) * | 2009-10-21 | 2012-08-13 | 후쿠이 켄 | Drill for composite material as well as machining method using same and machining apparatus using same |
| CN202845819U (en) * | 2012-11-12 | 2013-04-03 | 江西杰浩硬质合金工具有限公司 | Spiral single cutting tool |
| CN204584368U (en) * | 2015-03-10 | 2015-08-26 | 深圳市圆梦精密技术研究院 | Composite hole machined interlocks cutting drill reamer tool |
| CN204603396U (en) * | 2015-03-30 | 2015-09-02 | 四平博尔特工艺装备有限公司 | Whole hard alloy dagger bores |
| CN105034076B (en) * | 2015-08-18 | 2016-07-27 | 大连理工大学 | A kind of dedicated tool of the efficient drilling of fibre reinforced composites |
| CN205362789U (en) * | 2016-01-13 | 2016-07-06 | 江西杰浩硬质合金工具有限公司 | Dagger of left -hand screw right side sword bores |
-
2016
- 2016-01-13 CN CN201610021563.8A patent/CN105499661B/en active Active
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| Publication number | Publication date |
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| CN105499661A (en) | 2016-04-20 |
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