CN201455362U - Multiple edge point sheet twist drill with vertical milling knife-like outer edge, outer edge sharp angle of 200 degrees and outer edge lateral R-shaped edge - Google Patents
Multiple edge point sheet twist drill with vertical milling knife-like outer edge, outer edge sharp angle of 200 degrees and outer edge lateral R-shaped edge Download PDFInfo
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- CN201455362U CN201455362U CN2008201758859U CN200820175885U CN201455362U CN 201455362 U CN201455362 U CN 201455362U CN 2008201758859 U CN2008201758859 U CN 2008201758859U CN 200820175885 U CN200820175885 U CN 200820175885U CN 201455362 U CN201455362 U CN 201455362U
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Abstract
The utility model relates to a multiple edge point sheet twist drill with a vertical milling knife-like outer edge, an outer edge sharp angle of 200 degrees and an outer edge lateral R-shaped edge, which is a high speed steel twist drill and comprises nine edges of a vertical milling knife-like outer edge L1, a lateral R-shaped edge, an arc edge L2, an inner straight edge L3, a chisel edge b and the like, moreover, the multiple edge point sheet twist drill of the utility model has three points of a central drill point and two outer edge points which are formed through the intersection of an outer straight edge L1 and the R-shaped edge. The multiple edge point sheet twist drill of the utility model has the remarkable characteristics that the points are up to three and the edges amount to nine, the center is fixed through three points, the nine edges divide chips and drill, the axial resistance force is decreased by almost 40 percent compared with a standard twist drill, the R-shaped edge Lr plays a role in smoothing, the centering, chip dividing and chip removal properties are excellent, the knife thrust and the jamming of drill heads do not occur, the straw hat shape disc drill chips are automatically collapsed, and the sheet drilling efficiency, the drillhole quality and the operational safety are greatly enhanced.
Description
Affiliated field
The utility model belongs to a kind of high speed steel twist drill, specifically a kind of slotting cutter shape outside, 200 ° of outside sharp angles, the multiple-cutting-edge point thin plate fluted drill of outside outside R shape sword.
Background technology
Fluted drill invention more than 100 year, the whole world be still in a large amount of uses, world standard fluted drill and serve as the multiple world advanced person's commonly used that derives of basis fluted drill with it, and its outside sharp angle is generally 118 °～135 °.Fluted drill is used in the multiple common metal of drilling in a large number, as: band iron, sheet metal (containing stainless steel), square tube, angle bar or the like, general thickness is between 0.1～5.0mm.And bench drill commonly used or electric hand drill finish above work, has at the subject matter in these drill bit drillings processing:
(1) hole shape is round, gets out polygonal holes, and the aperture goes out overlap, burr, and the hole can not be shaped (even sometimes seriously to tearing the workpiece position of need holing) when serious, is easy to when particularly boring sheet brass the hole is scratched.
(2) the sheet metal part is bigger sometimes, usually is not easy to be installed on lathe, and generally promptly with hand steered part boring, when the hole will be bored, part can be shaken like this, not hand steered not living, and accidents happened easily.
(3) the general rigidity of sheet part is all lower, easy deformation.In the boring, material is turned round on the one hand, is subjected to axial force toward pressing down on the one hand, often produces the bird caging distortion.
(4) bore thin plate with common fluted drill, when the firm brill of unbearable point is saturating, drill bit loses the centering ability suddenly, and workpiece produces shake, sharply descends because of axial force simultaneously, the rapid resilience of workpiece material, the instantaneous increasing of the amount of feeding is a lot, and the cutting torque strengthens the formation peak value suddenly, may turn round bad drill bit, be easy to that accidents happened, and will produce overlap in the aperture.The experimental study that has shows, more is the low plastic plate of elastic modelling quantity (E), and its peak value that forms the cutting torque is more remarkable; The relief angle of drill bit more then peak value is bigger; The amount of feeding is bigger, and peak value is bigger.
Different brill types are adopted in the experimental study that has, and as ellipsoid drill bit, multiple sharp angle drill bit, little sharp angle drill bit and the test of common making comparisons property of fluted drill, show that these brill types all can not effectively solve the high burr that common fluted drill type is occurred.
(5) characteristics and the use of brill thin plate Ni Zhifu drill; there is the drill bit of special drilling thin plate in China in the Ni Zhifu drill series brill type of nineteen fifty-three invention; brill thin plate Ni Zhifu drill is the crescent moon circular arc increasing with the basic model Ni Zhifu drill; up to having only three cusps; attack power is all concentrated on three sharp blade tips, and unbearable point is the incision workpiece earlier, lives the center surely; two outer blade tips are drawn circle as compasses; rapidly the disk of centre is cut off, obtain desired hole, efficiently; effect is fine; be specially adapted to the thin plate of 0.1～1.5mm, its shortcoming is that straw hat shape disk drilling cuttings usually was bonded on the apex point after hole drill led to; must shut down with manually removing, otherwise influence next hole.And the thick material drill bit durability of drilling reduces.
(6) characteristics of step drill and use, for solving the difficulty of centering and thin plate boring, also popular a kind of step drill abroad: this fluted drill centering is functional, bores the thin plate Ni Zhifu drill of thin plate performance not as China, shows that mainly efficient is low.The material that bores when too thin, drilling quality is also bad.
(7) slotting cutter shape outside, the multiple-cutting-edge point thin plate fluted drill (being the utility model patent that I have accepted) that the outside sharp angle is 200 °.
Though can solve an above boring difficult problem substantially, because drilling heat concentrates on outer blade tip, the running hours durability is low slightly, runs into impact load, and outer blade tip easily collapses, rapid wear, and when boring thick material, situation shows seriously.
Can invent a kind of centering accurate, bore the thin plate hole circle, the exit burr is few and straw hat shape drilling cuttings can collapse automatically and takes off, on thin plate, can hole efficient, continuously, on thick material when boring the fluted drill that further increases of durability, be that the many people in the whole world want the difficult problem that solves for many years always.
Summary of the invention
The purpose of this utility model is by the centering of multiple-cutting-edge point, 200 ° of sharp angles, the outside cutting of the similar slotting cutter of outside outside R shape sword, inventing a kind of drilling resistance ratios standard fluted drill reduces significantly, boring centering is steady, accurate, knife not when boring is fast logical, hole wall fineness further improves, hole exits does not have burr substantially, and straw hat shape disk drilling cuttings can collapse automatically and takes off, drilling quality and durability are than accepting the slotting cutter shape outside that my utility model patent " slotting cutter shape outside; the multiple-cutting-edge point thin plate fluted drill that the outside sharp angle is 200 ° " further improves, 200 ° of outside sharp angles, the multiple-cutting-edge point thin plate fluted drill of outside outside R shape sword.
The technical scheme that its technical problem of the utility model is taked is
What the utility model adopted is a kind of slotting cutter shape outside, 200 ° of outside sharp angles, the multiple-cutting-edge point thin plate fluted drill of outside outside R shape sword, it comprises the fried dough twist drill body, multiple-cutting-edge pointed drill type, it is characterized in that: outside L1 sharp angle 2 Φ are between 180 °～220 °, R shape sword Lr is that the positive tangent angle of cut 2 Φ r are 115 °～155 °, the R radius is that circular arc or the sharp angle of 0.05d is the straight line of 135 ° of long 0.05d, interior straight knife edge angle 2 Φ τ are between 90 °～120 °, outer edge clearance angle a fc and R shape edge clearance angle are between 10 °～16 °, circular arc edge clearance angle a Rc between 15 °～21 °, inner edge oblique angle τ between 35 °～45 °, interior angle of cutting edge+10 °～10 °.
It is characterized in that: when Φ≤13mm drill bit, slotting cutter shape outside L1 length is between 0.1d～0.25d, when Φ 〉=13mm, its outside L1 becomes parallel with L1 in half length place reconditioning, but the stepped cutting edge of indent 0.5mm, difference in height h2 is between 0.1d～0.2d, and the high h of apex point is between 0.05d～0.1d, and chisel edge b ψ length is got between 0.05mm～0.35mm.
It is characterized in that: circular arc sword L2 two ends tangent extending line angle is 90 °, and circular arc sword L2 minimum point is lower than outside L1, and difference in height h2 is between 0.01d～0.1d.
Drill bit outside L1 is slotting cutter shape, outside R shape sword, circular arc sword L2, and interior straight sword L3, chisel edge b ψ amounts to nine swords, and the center apex point that chisel edge forms is the highest, and outside L1 and crossing two the outer blade tips that form of R shape sword, amounts to 3 points, altogether tricuspid nine swords.
The beneficial effects of the utility model are
Axial resistance reduces nearly 40% than standard fluted drill, tricuspid centering, and nine swords divide the bits drilling, and R shape sword Lr plays the smoothing effect again, makes it have fabulous centering, divides bits, chip removal performance; Its bores thin plate when logical soon, not knife, not drill-pipe-sticking-head, have and collapse the performance of taking off straw hat shape disk drilling cuttings automatically; During boring, after the apex point centering, two outer blade tips cut thin plate rapidly, and along with the increase of the degree of depth, outside L1 partly progressively cuts by unbearable, and after outer blade tip was cut and worn thin material, the reaction force of the axial cutting force of outside L1 collapsed straw hat shape drilling cuttings and takes off.During circular arc cutting drill thin plate, do not participate in cutting during less than 0.13d substantially at plate thickness; Therefore, with the thin plate of drill bit size 0.1～1.5mm, as long as the metal in excision hole circle week 20%, other metal of 80% promptly collapses automatically and takes off, this is efficiently and the not reason of knife of the utility model boring, and it has improved brill thin plate efficient and drilling quality and processing safety widely.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further specified.
Fig. 1 is that the utility model first is implemented illustration;
Fig. 2 is the vertical view of Fig. 1 embodiment;
Fig. 3 is that the utility model second is implemented illustration;
Fig. 4 is the vertical view of Fig. 3 embodiment;
Fig. 5 is that the utility model the 3rd is implemented illustration;
Fig. 6 is the vertical view of Fig. 5 embodiment;
Fig. 7 is that the utility model the 4th is implemented illustration;
Fig. 8 is the vertical view of Fig. 7 embodiment.
1〉in Fig. 1, Fig. 2, outside L1, inner edge L3, outside sharp angle 2 Φ are between 180 °～220 °, be generally 200 °, the R shape sword Lr positive tangent angle of cut 2 Φ r are 115 °～155 °, get 135 ° usually, the R radius is 0.05d, interior straight knife edge angle 2 Φ τ generally get 100 ° between 90 °～120 °, outer edge clearance angle a fc and R shape edge clearance angle are between 10 °～16 °, generally get 14 °, circular arc edge clearance angle aRc generally gets 18 ° between 15 °～21 °, inner edge oblique angle τ is between 35 °～45 °, generally get 40 °, interior angle of cutting edge γ τ c is 0 °.
2〉in Fig. 1, Fig. 2, outside L1 length is generally got 0.1d～0.15d between 0.1d～0.25d, and the high h of apex point generally gets 0.08d between 0.05d～0.1d, and chisel edge b ψ length is got and generally got 0.15mm between 0.05mm～0.35mm.
3〉in Fig. 1, Fig. 2, circular arc L2 two ends tangent extending line angle is 90 °, and it is its outstanding feature that circular arc sword L2 minimum point is lower than outside L1, and difference in height h2 generally gets 0.05d between 0.01d～0.1d.
4〉in Fig. 3, Fig. 4, the utility model is less than the approximate R shape sword that replaces of 13mm drill bit straight line sword, and Lr length is got 0.05d usually, and two straight line sword Lr sharp angles, 2 Φ r are 135 °.
5〉in Fig. 5, Fig. 6, greater than Φ 13mm drill bit, its outside L1 〉=2mm can become parallel with L1 in half length place reconditioning of its outside L1, but the stepped cutting edge of the about 0.5mm of indent.
6〉in Fig. 7, Fig. 8, the utility model is greater than the approximate R shape sword that replaces of 13mm drill bit straight line sword, and Lr gets 0.05d usually, and two straight line sword Lr sharp angles, 2 Φ r are 135 °.
The specific embodiment
Embodiment one,
1, in Fig. 1, Fig. 2, outside sharp angle 2 Φ are 200 °, and interior straight knife edge angle 2 Φ τ are 100 °, and outer edge clearance angle a fc and R shape edge clearance angle are got 14 °, circular arc edge clearance angle a Rc is 18 °, inner edge oblique angle τ is 40 °, and interior angle of cutting edge γ τ c is 0 °, and circular arc sword L2 two ends tangent extending line angle is 90 °, circular arc sword L2 minimum point is lower than outside L1, difference in height h2 is 0.05d, and the high h of apex point is 0.08d, and chisel edge b ψ length is 0.15mm.
2, in Fig. 1, Fig. 2, outside L1 is 0.12d, and R shape sword Lr is the circular arc sword, and its positive tangent angle of cut 2 Φ r are 135 °, and its R radius is 0.05d.
Embodiment two,
1, in Fig. 3, Fig. 4, outside sharp angle 2 Φ are 200 °, and interior straight knife edge angle 2 Φ τ are 100 °, and outer edge clearance angle a fc and R shape edge clearance angle are got 14 °, circular arc edge clearance angle a Rc is 18 °, inner edge oblique angle τ is 40 °, and interior angle of cutting edge γ τ c is 0 °, and circular arc sword L2 two ends tangent extending line angle is 90 °, circular arc sword L2 minimum point is lower than outside L1, difference in height h2 is 0.05d, and the high h of apex point is 0.08d, and chisel edge b ψ length is 0.15mm.
2, in Fig. 3, Fig. 4, outside L1 is 0.12d, and R shape sword Lr is the straight line sword, and its angle of cut 2 Φ r are 135 °, and length is 0.05d.
Embodiment three,
1, in Fig. 5, Fig. 6, outside sharp angle 2 Φ are 200 °, and interior straight knife edge angle 2 Φ τ are 100 °, and outer edge clearance angle a fc and R shape edge clearance angle are got 14 °, circular arc edge clearance angle a Rc is 18 °, inner edge oblique angle τ is 40 °, and interior angle of cutting edge γ τ c is 0 °, and circular arc sword L2 two ends tangent extending line angle is 90 °, circular arc sword L2 minimum point is lower than outside L1, difference in height h2 is 0.05d, and the high h of apex point is 0.08d, and chisel edge b ψ length is 0.25mm.
2, in Fig. 5, Fig. 6, present embodiment is greater than Φ 13mm drill bit, and its outside L1 〉=2mm can become parallel with L1 in half length place reconditioning of its outside L1, but the stepped cutting edge of the about 0.5mm of indent.
3, in Fig. 5, Fig. 6, R shape sword Lr is the circular arc sword, and its positive tangent angle of cut 2 Φ r are 135 °, and its R radius is 0.05d.
Embodiment four,
1, in Fig. 5, Fig. 6, outside sharp angle 2 Φ are 200 °, and interior straight knife edge angle 2 Φ τ are 100 °, and outer edge clearance angle a fc and R shape edge clearance angle are got 14 °, circular arc edge clearance angle a Rc is 18 °, inner edge oblique angle τ is 40 °, and interior angle of cutting edge γ τ c is 0 °, and circular arc sword L2 two ends tangent extending line angle is 90 °, circular arc sword L2 minimum point is lower than outside L1, difference in height h2 is 0.05d, and the high h of apex point is 0.08d, and chisel edge b ψ length is 0.25mm.
2, in Fig. 5, Fig. 6, present embodiment is greater than Φ 13mm drill bit, and its outside L1 〉=2mm can become parallel with L1 in half length place reconditioning of its outside L1, but the stepped cutting edge of the about 0.5mm of indent.
3, in Fig. 3, Fig. 4, outside L1 is 0.12d, and R shape sword Lr is the straight line sword, and its angle of cut 2 Φ r are 135 °, and length is 0.05d.
Claims (3)
1. slotting cutter shape outside, 200 ° of outside sharp angles, the multiple-cutting-edge point thin plate fluted drill of outside outside R shape sword, it comprises the fried dough twist drill body, multiple-cutting-edge pointed drill type, it is characterized in that: outside L1 sharp angle 2 Φ are between 180 °～220 °, R shape sword Lr is that the positive tangent angle of cut 2 Φ r are 115 °～155 °, the R radius is that circular arc or the sharp angle of 0.05d is the straight line of 135 ° of long 0.05d, interior straight knife edge angle 2 Φ τ are between 90 °～120 °, outer edge clearance angle a fc and R shape edge clearance angle a fcr are between 10 °～16 °, circular arc edge clearance angle a Rc between 15 °～21 °, inner edge oblique angle τ between 35 °～45 °, interior angle of cutting edge+10 °～-10 °.
2. according to claim 1, slotting cutter shape outside, 200 ° of outside sharp angles, the multiple-cutting-edge point thin plate fluted drill of outside outside R shape, it is characterized in that: Φ≤13mm drill bit, slotting cutter shape outside L1 length is between 0.1d～0.25d, and when Φ 〉=13mm, its outside L1 becomes parallel with L1 in half length place reconditioning, but the stepped cutting edge of indent 0.5mm, difference in height h2 is between 0.1d～0.2d, and the high h of apex point is between 0.05d～0.1d, and chisel edge b ψ length is got between 0.05mm～0.35mm.
3. according to claim 1, slotting cutter shape outside, 200 ° of outside sharp angles, the multiple-cutting-edge point thin plate fluted drill of outside outside R shape, it is characterized in that: circular arc sword L2 two ends tangent extending line angle is 90 °, and circular arc sword L2 minimum point is lower than outside L1, and difference in height h2 is between 0.01d～0.1d.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008201758859U CN201455362U (en) | 2008-11-02 | 2008-11-02 | Multiple edge point sheet twist drill with vertical milling knife-like outer edge, outer edge sharp angle of 200 degrees and outer edge lateral R-shaped edge |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008201758859U CN201455362U (en) | 2008-11-02 | 2008-11-02 | Multiple edge point sheet twist drill with vertical milling knife-like outer edge, outer edge sharp angle of 200 degrees and outer edge lateral R-shaped edge |
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| CN201455362U true CN201455362U (en) | 2010-05-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2008201758859U Expired - Fee Related CN201455362U (en) | 2008-11-02 | 2008-11-02 | Multiple edge point sheet twist drill with vertical milling knife-like outer edge, outer edge sharp angle of 200 degrees and outer edge lateral R-shaped edge |
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Cited By (7)
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| CN104338978A (en) * | 2013-07-31 | 2015-02-11 | 上海名古屋精密工具股份有限公司 | High-strength highly-durable drill bit |
| CN106424832A (en) * | 2016-11-11 | 2017-02-22 | 成都锋宜精密工具制造有限公司 | Drill bit drill tip with self-centering function |
| CN106891051A (en) * | 2015-12-19 | 2017-06-27 | 中钢集团衡阳重机有限公司 | A kind of fluted drill oil groove milling cutter |
| CN107717021A (en) * | 2017-10-31 | 2018-02-23 | 湖南科技大学 | Carbon fibre reinforced composite target drill with Circular Nose Cutting Edge blade |
| CN107717020A (en) * | 2017-10-31 | 2018-02-23 | 湖南科技大学 | Carbon fibre reinforced composite target drill with straight sword type blade |
| WO2019019334A1 (en) * | 2017-07-24 | 2019-01-31 | 方大控股有限公司 | Alloy drill bit facilitating chip removal |
| WO2024060632A1 (en) * | 2022-09-23 | 2024-03-28 | 丹阳市剑庐工具有限公司 | Cutting facilitating twist drill with long service life |
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2008
- 2008-11-02 CN CN2008201758859U patent/CN201455362U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104338978A (en) * | 2013-07-31 | 2015-02-11 | 上海名古屋精密工具股份有限公司 | High-strength highly-durable drill bit |
| CN104338978B (en) * | 2013-07-31 | 2017-08-04 | 上海名古屋精密工具股份有限公司 | The high durable drill bit of high intensity |
| CN106891051A (en) * | 2015-12-19 | 2017-06-27 | 中钢集团衡阳重机有限公司 | A kind of fluted drill oil groove milling cutter |
| CN106424832A (en) * | 2016-11-11 | 2017-02-22 | 成都锋宜精密工具制造有限公司 | Drill bit drill tip with self-centering function |
| WO2019019334A1 (en) * | 2017-07-24 | 2019-01-31 | 方大控股有限公司 | Alloy drill bit facilitating chip removal |
| CN107717021A (en) * | 2017-10-31 | 2018-02-23 | 湖南科技大学 | Carbon fibre reinforced composite target drill with Circular Nose Cutting Edge blade |
| CN107717020A (en) * | 2017-10-31 | 2018-02-23 | 湖南科技大学 | Carbon fibre reinforced composite target drill with straight sword type blade |
| WO2024060632A1 (en) * | 2022-09-23 | 2024-03-28 | 丹阳市剑庐工具有限公司 | Cutting facilitating twist drill with long service life |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| DD01 | Delivery of document by public notice |
Addressee: Zhou Anshan Document name: Notification to Pay the Fees |
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| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100512 Termination date: 20101102 |