CN109262738A - It is a kind of with return hook sword manual drill bit - Google Patents
It is a kind of with return hook sword manual drill bit Download PDFInfo
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- CN109262738A CN109262738A CN201811199427.3A CN201811199427A CN109262738A CN 109262738 A CN109262738 A CN 109262738A CN 201811199427 A CN201811199427 A CN 201811199427A CN 109262738 A CN109262738 A CN 109262738A
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- cutting edge
- sword
- angle
- drill bit
- main cutting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
- B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
- B26F1/32—Hand-held perforating or punching apparatus, e.g. awls
Abstract
The present invention it is a kind of with return hook sword manual drill bit belongs to machine tools field, be related to it is a kind of with return hook sword manual drill bit, especially suitable for fibre reinforced composites hand-made hole.The drill bit, for basic brill type, modifies its two corner angle with convex Double Tops angle, to reduce drilling axial force, inhibits the generation of layering and tearing damage.Drill bit is returned by chisel edge, the first main cutting edge, the second main cutting edge and is hooked sword, four end cutting edges, six part of knife handle composition.Returning for drill bit hooks sword included in the second main cutting edge, is scraped cutting blade by a reversed sword and one and is constituted.The drill bit, which is used, hooks sword structure by reversed sword and returning of scraping that cutting blade constitutes, and carries out secondary removal to the burr damage generated, the end cutting edge of small relief angle is utilized to complete the final ream finishing of hole wall.Chip space takes lesser helical angle, reduces and feeds the unstable interference to process.The drill bit realizes the brill reaming disposably manual high quality drilling to fibrous composite.
Description
Technical field
The invention belongs to machine tools field, be related to it is a kind of with the manual drill bit for hooking sword is returned, especially suitable for fibre
Dimension enhancing composite material hand-made hole.
Background technique
With the continuous appearance of all kinds of advanced fiber reinforced composites, light weight, intensity is high, anticorrosive, endurance
More and more concerns are attracted etc. numerous good characteristics.Wherein, carbon fibre reinforced composite (CFRP) and fiberglass reinforced are multiple
Condensation material (GFRP) is that use scope is most wide, two most class materials of application.The two is by hard brittle fiber and soft tree
The composite material that aliphatic radical body collectively forms, during carrying out drilling processing to it, due to fiber reinforcement phase and resin matrix
Huge mechanical property difference between phase, easily generate when drilling it is difficult to predict layering, tearing, burr equivalent damage, these damages
Wound can cause various processing problems.After especially processing generates burr damage, burr can be fitted tightly in cutter flank,
During cutter at high speeds rotation, due to the strong abrasion of fiber reinforcement phase, extremely serious scratching is specifically generated to knife
Effect, to make cutting edge fast degradation, cutter life is significantly reduced.
A large amount of experts and scholars develop all kinds of new drills, to inhibit the generation of machining damage, improve processing quality, drop
Low tool wear." a kind of micro- tooth Double-margin brill ream one drill bit of ladder " that Wang Fu Ji et al. proposes, number of patent application
201611182140.0, it is related to a kind of realization laminated material brill ream integration process tool, the micro- toothing of the multi-ladder of proposition
Effectively cut staple burr, reduction hole entrance machining damage, spot-facing sword it can realize final spot-facing processing request.However
The new drill is machine stick of tool head, is not able to satisfy hand-made hole demand in actual production work." the tool that Su Fei et al. is proposed
Have the carbon fibre reinforced composite target drill of Circular Nose Cutting Edge blade ", number of patent application 201711047792.8, it is related to one kind
With Circular Nose Cutting Edge blade drill bit, propose that arc-shaped apex point portion, reamer and multiple-cutting-edge tip is arranged, while in drill main body outer circle
Two small inclination helicla flutes are set on circumferential surface, and implementation phase removes flash removed, reduces delamination damage during hand-made hole.So
And it is the wearability for guaranteeing cutter, it is brazed polycrystalline diamond blade on drill main body head, increases the manufacturing cost of cutter.K.
" method for the PCD cutting blade tip and formation of the rotary cutting tool cutter " that Sang Pase et al. is proposed, number of patent application
201710654872.3, it is related to a kind of rotary cutting tool with polycrystalline diamond blade tip, by designing special drill bit
End structure is simultaneously integrated on cutter body using soldering processes, and the service performance and processing quality of cutter, but point of a knife knot are improved
Composition type is complicated, and it is cumbersome and inconvenient in overall processing to be brazed formula cutter making process.
Some need to meet the required revolving speed feed ratio of processing with above-mentioned cutter, some need to guarantee that higher verticality is wanted
It asks, some need to provide biggish drilling axial force, and the above processing conditions is difficult to realize in hand-made hole, therefore limits above-mentioned
The application of new-type cutter in production.
Summary of the invention:
Present invention mainly solves technical problem be in drilling using CFRP and GFRP as the fibre reinforced composites of representative
When, under the premise of cannot be guaranteed to feed the manual drilling of rotating ratio, the cutting ability of drill bit is promoted as far as possible, is reduced in single system
Layering, burr and the tearing damage of the drilling entry and exit formed during hole.The drill bit, for basic brill type, is modified with Double Tops angle
Its two corner angle reduces drilling axial force, inhibits the generation of layering and tearing damage.It is used in the second main cutting edge end
" reversed cutting " and returning for " change of edge, which is scraped, being cut " hook sword structure, and outlet fiber is reversely cut in realization and circumferential scrape is cut, and promotes drilling
Quality reduces single hole cost.Ream is carried out to cutting hole wall by the end cutting edge of small relief angle again, to obtain impulse- free robustness and hole
The lesser manual processing hole of wall roughness, is allowed to be more suitable for cutting off fiber.
The technical solution adopted by the present invention is that a kind of with the manual drill bit for returning hook sword, characterized in that the drill bit is with convex double
Apex angle is basic brill type, modifies its two corner angle, reduces drilling axial force, inhibits the generation of layering and tearing damage；Drill bit
By chisel edge A, the first main cutting edge B, the second main cutting edge C, to return and hook sword D, six parts four end cutting edge E, knife handle F form,
Wherein, it returns and hooks sword D included in the second main cutting edge C, drill bit specific structure parameter is as follows:
The drill bit is the convex Double Tops corner structure of four chip spaces, and initial cuts differentiation is furnished with the first, second two main cuttings
Sword B, C；Reaming district is evenly equipped with four end cutting edge E, and two of them end cutting edge E extends to initial drilling area and cuts with the first master
Sword B intersection is cut, two other end cutting edge E extends to the first main cutting edge minor flank, and multiple-cutting-edge cuts improve drilling simultaneously
Processing efficiency；It is chisel edge A in drill bit front end, is the adjective-centre structure of drill bit, to adapt to the small axial force request of composite material, takes brill
Heart thickness b takes 0.25-0.35 times of bit diameter d, and chisel edge width a is 0.35 times of unbearabling thickness b；
First main cutting edge B is initial drilling area, and for the generation for inhibiting layering and tearing damage, taking the first apex angle α is 60-
90 °, it is 20-25 ° that the reconditioning section, which cuts angle of cutting edge q1, and relief angle h1 is 25-32 °, promotes cutting edge to the cuttability of fiber, takes the
One main cutting edge end diameter d1 is 0.4-0.47 times of cutter diameter d；
Second main cutting edge C is reaming district, for achieving working to whole bore dia and removing damage caused by initial drilling,
Second apex angle ss is between 15-18 °, and in the region, reconditioning goes out land R, controls width between 0.5-2.0mm, the reconditioning section is cut
Angle of cutting edge q2 is cut at 15-20 °, relief angle h2 is between 8-15 °；
It returns and hooks sword D included in the second main cutting edge C, scraped cutting blade N by a reversed sword M and one and collectively formed, reversely
Between 5-7 °, the anterior angle q3 of reversed sword M is 14-17 ° by sword M and horizontal line angle γ, and relief angle h3 is 10-15 °, reversed sword M's
Distance e of the top away from the second main cutting edge C is 0.1-0.15d, and controlling back the cutting blade N and axial direction θ that scrapes hooked in sword D is 12-
15 °, it is 10-14 ° that cutting blade anterior angle q4 is scraped in reconditioning, and scraping cutting blade relief angle h4 is 8-10 °, scrapes the top cutting blade N the second main cutting edge of distance C
It is 0.5-1.0mm with the length f that end cutting edge E has a common boundary, returns hook sword land g wide with reconditioning on cutting blade N is scraped in reversed sword M respectively
0.2-0.5mm；
Two end cutting edge E inherit the front-and-back angle of the second main cutting edge C, while reconditioning goes out front clearance se, take its numerical value to be
1.2-1.5 times of second main cutting edge C relief angle h2, taking the helical angle u of chip space is 5-7 °, expands the second main cutting along helicla flute
On land R to end cutting edge E on sword C；Knife handle F diameter d2 often takes 6-8mm according to clamping demand.
The beneficial effects of the invention are as follows use that there is back the manual drill bit for hooking sword to process using CFRP and GFRP as the fibre of representative
When tieing up composite material, the cuttability of cutter is promoted by the front-and-back angle that different cutting parts change.With the Double Tops angle of smaller size
Structure inhibits the formation of tearing damage, reduces the axial force in drilling process, and reduce outlet delamination damage.Using by reversed
Sword and time hook sword structure for scraping cutting blade composition carry out secondary removal to the burr damage generated, utilize the pair cutting of small relief angle
Sword completes the final ream finishing of hole wall.Chip space takes lesser helical angle, cooperates low-angle Double Tops corner structure to adapt to craft
The processing conditions of drilling reduces and feeds the unstable interference to process.The drill bit adapts to manual drilling processing conditions, effectively
Realize the brill reaming disposably manual high quality drilling to fibrous composite.
Detailed description of the invention
Fig. 1 is a kind of with the main view for hooking the novel handcraft drill bit of sword is returned, and Fig. 2 is the K direction view of Fig. 1, and Fig. 3 is apex point
Partial partial enlarged view, Fig. 4 are back to hook the partial enlarged view of sword structure.Wherein: A- chisel edge, the first main cutting edge of B-, C-
Two main cutting edges, D-, which is returned, hooks sword, E- end cutting edge, F- knife handle, the reversed sword of M-, and N- scrapes cutting blade；A- chisel edge width, the unbearable thickness of b-
It is cut away from the second master on the top of degree, d- cutter diameter, d1- the first main cutting edge end diameter, d2- knife handle F diameter, the reversed sword M of e-
The distance of sword C is cut, f- scrapes the length of the boundary the top cutting blade N distance the second main cutting edge C and end cutting edge E, and g-, which is returned, hooks sword land
Width, q1- the first main cutting edge B anterior angle, q2- the second main cutting edge C anterior angle, the reversed sword M anterior angle of q3-, q4- scrape cutting blade N anterior angle,
H1- the first main cutting edge B relief angle, h2- the second main cutting edge C relief angle, the reversed sword M relief angle of h3-, h4- scrape cutting blade N relief angle, se- pair
Cutting edge E front clearance, u- helical angle；α-the first apex angle, β-the second apex angle, θ-scrape cutting blade N and axial angulation, the reversed sword M of γ-with
Horizontal line angle.
Specific embodiment:
With reference to the accompanying drawing with the technical solution specific implementation that the present invention will be described in detail.
As shown in Figure 1,2,3, 4 is a kind of with the manual drill bit for hooking sword is returned, especially suitable for drilling with CFRP and GFRP
For the fibre reinforced composites of representative, the drill bit, for basic brill type, modifies its two corner angle with convex Double Tops angle, reduces drilling
Axial force inhibits the generation of layering and tearing damage.Drill bit is by chisel edge A, the first main cutting edge B, the second main cutting edge C, time hook
Sword D, four end cutting edge E, six part knife handle F composition.Wherein, it returns and hooks sword E included in the second main cutting edge C, realize to fibre
The reversed cutting of dimension and circumferential scrape cut the tearing except machined material, layering equivalent damage.In this example, the bit diameter d is taken to be
6mm。
The adjective-centre structure chisel edge A is located at drill bit front end, as shown in Figure 1.Drill bit part determines the initial bit of drilling
It sets, carries 50% or more drilling axial force, to guarantee the specific intensity of knife, unbearabling thickness b is chosen for b=0.25d=
1.5mm.Axial force is fed when due to manual drilling to provide for manpower, takes chisel edge width a=under the premise of not influencing centering requirement
0.35b=0.525mm, relatively small axial force request when adapting to composite processing, furthermore otherwise chisel edge too small cannot will make knife
Has service life reduction.
Initial drilling area where first main cutting edge B, main cutting edge rake face connect chip space, it is smooth to be conducive to chip
Outflow, first apex angle α of part are chosen for 60 °, effectively inhibit the generation of drilling initial stage layers of material and tearing damage.First
Main cutting edge anterior angle q1 is 20 °, and relief angle h1 is 25 °, guarantees cutting edge sharpness and intensity, being capable of property cut machined material
In carbon fiber, while reducing wear of the tool flank to improve cutter life.First main cutting edge end diameter d1=0.4d=
2.4mm, this forms aperture for first stage drilling.
Reaming district where second main cutting edge C carries out reaming processing to first stage pore-forming, while removing initial drilling
Layering, tearing and the burr equivalent damage of process.Reaming district is evenly equipped with four end cutting edge E, and two of them end cutting edge extends to
Initial drilling area simultaneously intersects with the first main cutting edge, and two other end cutting edge extends to the first main cutting edge minor flank, more
Sword cuts improve drilling processing efficiency simultaneously.The second apex angle ss of reaming district is 15 °, and lesser second apex angle, which is conducive to reduce, to be cut
Cut axial force.It is 0.5mm in the region land R width, the second main cutting edge anterior angle q2 is 15 °, and relief angle h2 is 8 °, small front and back
Angle ensure that the intensity of cutting edge.Returning in the second main cutting edge C hooks sword D by reversed sword M and scrapes cutting blade N and form, as Fig. 3 is back
The partial enlarged view of sword structure is hooked, reversed sword M and horizontal line angle γ are 5 °, and reversely cutting is gone when realizing drilling bit high-speed rotary
Except outlet burr, the anterior angle q3 of reversed sword M is 14 °, and relief angle h3 is 10 °, the top of reversed sword M away from the second main cutting edge C away from
From e=0.1d=0.6mm, returning the cutting blade N and axial direction θ that scrapes hooked in sword D is 12 °, and realization scrapes the effect of cutting to the circumferential direction of hole wall,
Scraping cutting blade anterior angle q4 is 10 °, and relief angle h4 is 8 °, scrapes the length of the boundary the top cutting blade N distance the second main cutting edge C and end cutting edge E
Degree f is 0.5mm, returns hook sword land g wide 0.2mm with reconditioning on cutting blade N is scraped in reversed sword M respectively.
Two end cutting edge E accept the second main cutting edge C and with its front-and-back angle having the same, the part cutting output is very
It is small, mainly undertake the ream effect to hole wall.End cutting edge front clearance se=1.5h2=12 °, avoid flank and machined hole
Wall contact causes cutter and has become the damage of type hole, and the chip space helical angle u through drill bit reaming district and end cutting edge area is 7 °,
Lesser helical angle makes chip space total length shorten, and chip is discharged in time when being conducive to manual drilling, expands second along helicla flute
On land R to end cutting edge E on main cutting edge C.Knife handle F diameter d2 takes 8mm according to the demand actually clamped.
The present invention is suitble to process using CFRP and GFRP as the fibre reinforced composites of representative, is become by different cutting parts
The front-and-back angle of change promotes cutter to the cuttability of fiber.Inhibit initial tearing damage with the chisel edge and apex angle structure of smaller size
It is formed, reduces the axial force in drilling process, reduce outlet delamination damage.Using returning, hook sword structure is reversed to burr equivalent damage
Cutting circumferentially is scraped to cut and be removed.It completes to modify the final ream of hole wall using the end cutting edge of small relief angle, reduces surface roughness
Value.Chip space takes lesser helical angle, cooperates low-angle Double Tops corner structure to adapt to the processing conditions of manual drilling, reduces feeding
The unstable interference to process, to realize the brill reaming disposably manual high quality drilling to fibrous composite.
Claims (1)
1. a kind of with the manual drill bit for returning hook sword, characterized in that the drill bit, for basic brill type, modifies its two top with convex Double Tops angle
Angle angle reduces drilling axial force, inhibits the generation of layering and tearing damage；Drill bit is by chisel edge (A), the first main cutting edge (B),
Second main cutting edge (C) returns and hooks sword (D), four end cutting edges (E), and six parts of knife handle (F) form, wherein return and hook sword (D)
Included in the second main cutting edge (C), drill bit specific structure parameter is as follows:
The drill bit is the convex Double Tops corner structure of four chip spaces, initial cuts differentiation be furnished with the first, second two main cutting edges (B,
C)；Reaming district is evenly equipped with four end cutting edges (E), and two of them end cutting edge (E) extends to initial drilling area and leads with first
Cutting edge (B) intersection, two other end cutting edge (E) extend to the first main cutting edge minor flank, and multiple-cutting-edge cuts raising simultaneously
Drilling processing efficiency；It is chisel edge (A) in drill bit front end, is the adjective-centre structure of drill bit, to adapt to the small axial force of composite material
It is required that unbearabling thickness b is taken to take 0.25-0.35 times of bit diameter d, chisel edge width a is 0.35 times of unbearabling thickness b；
First main cutting edge (B) is initial drilling area, and for the generation for inhibiting layering and tearing damage, taking the first apex angle α is 60-
90 °, it is 20-25 ° that the reconditioning section, which cuts angle of cutting edge q1, and relief angle h1 is 25-32 °, promotes cutting edge to the cuttability of fiber, takes the
One main cutting edge end diameter d1 is 0.4-0.47 times of cutter diameter d；
Second main cutting edge (C) is reaming district, for achieving working to whole bore dia and removing damage caused by initial drilling, the
Two apex angle ss are between 15-18 °, and in the region, reconditioning goes out land R, control width between 0.5-2.0mm, the cutting of the reconditioning section
Angle of cutting edge q2 is at 15-20 °, and relief angle h2 is between 8-15 °；
It returns and hooks sword (D) included in the second main cutting edge (C), cutting blade (N) is scraped by a reversed sword (M) and one and is collectively formed,
Between 5-7 °, the anterior angle q3 of reversed sword (M) is 14-17 ° by reversed sword (M) and horizontal line angle γ, and relief angle h3 is 10-15 °, instead
Distance e to the top of sword (M) away from the second main cutting edge (C) is 0.1-0.15d, control back scraping in hook sword (D) cutting blade (N) and
Axial direction θ is 12-15 °, and it is 10-14 ° that cutting blade anterior angle q4 is scraped in reconditioning, and scraping cutting blade relief angle h4 is 8-10 °, scrapes the top cutting blade (N)
The length f that the second main cutting edge of distance (C) and end cutting edge (E) have a common boundary is 0.5-1.0mm, is cut respectively in reversed sword (M) and scraping
Reconditioning, which is returned, on sword (N) hooks sword land g wide 0.2-0.5mm；
Two end cutting edges (E) inherit the front-and-back angle of the second main cutting edge (C), while reconditioning goes out front clearance se, take its numerical value to be
1.2-1.5 times of second main cutting edge (C) relief angle h2, taking the helical angle u of chip space is 5-7 °, expands the second master along helicla flute and cuts
It cuts on the land R to end cutting edge (E) on sword (C)；Knife handle (F) diameter d2 often takes 6-8mm according to the demand of clamping.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811199427.3A CN109262738B (en) | 2018-10-16 | 2018-10-16 | Hand drill with back hook edge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811199427.3A CN109262738B (en) | 2018-10-16 | 2018-10-16 | Hand drill with back hook edge |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109262738A true CN109262738A (en) | 2019-01-25 |
| CN109262738B CN109262738B (en) | 2020-01-24 |
Family
ID=65196312
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811199427.3A Active CN109262738B (en) | 2018-10-16 | 2018-10-16 | Hand drill with back hook edge |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102825304A (en) * | 2011-06-17 | 2012-12-19 | 马克托罗工业株式会社 | Drill bit |
| CN105458354A (en) * | 2014-09-12 | 2016-04-06 | 贵州西南工具(集团)有限公司 | Novel composite material drilling bit and manufacturing method thereof |
| CN106270664A (en) * | 2016-08-30 | 2017-01-04 | 大连理工大学 | A kind of polycrystalline diamond compact bit with the micro-toothing of flip Trim |
| CN106475607A (en) * | 2015-08-31 | 2017-03-08 | 马克托罗工业株式会社 | Drill bit and it is perforated the manufacture method of part |
| JP2017087342A (en) * | 2015-11-09 | 2017-05-25 | 有限会社マザム技研 | Twist drill |
| US20170326652A1 (en) * | 2014-11-21 | 2017-11-16 | Kyocera Corporation | Drill and method of manufacturing machined product using the same |
| 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 |
-
2018
- 2018-10-16 CN CN201811199427.3A patent/CN109262738B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102825304A (en) * | 2011-06-17 | 2012-12-19 | 马克托罗工业株式会社 | Drill bit |
| CN105458354A (en) * | 2014-09-12 | 2016-04-06 | 贵州西南工具(集团)有限公司 | Novel composite material drilling bit and manufacturing method thereof |
| US20170326652A1 (en) * | 2014-11-21 | 2017-11-16 | Kyocera Corporation | Drill and method of manufacturing machined product using the same |
| CN106475607A (en) * | 2015-08-31 | 2017-03-08 | 马克托罗工业株式会社 | Drill bit and it is perforated the manufacture method of part |
| JP2017087342A (en) * | 2015-11-09 | 2017-05-25 | 有限会社マザム技研 | Twist drill |
| CN106270664A (en) * | 2016-08-30 | 2017-01-04 | 大连理工大学 | A kind of polycrystalline diamond compact bit with the micro-toothing of flip Trim |
| CN108608040A (en) * | 2018-05-10 | 2018-10-02 | 大连理工大学 | For composite material and its micro- serrated knife tool of the double ladders of the perpendicular sword of laminated construction high quality drilling |
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| Publication number | Publication date |
|---|---|
| CN109262738B (en) | 2020-01-24 |
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