CN2873376Y - Integrated drill bit - Google Patents
Integrated drill bit Download PDFInfo
- Publication number
- CN2873376Y CN2873376Y CN 200620050587 CN200620050587U CN2873376Y CN 2873376 Y CN2873376 Y CN 2873376Y CN 200620050587 CN200620050587 CN 200620050587 CN 200620050587 U CN200620050587 U CN 200620050587U CN 2873376 Y CN2873376 Y CN 2873376Y
- Authority
- CN
- China
- Prior art keywords
- concave surface
- drill
- main body
- point
- cross
- 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.)
- Expired - Lifetime
Links
Images
Landscapes
- Drilling Tools (AREA)
Abstract
The utility model provides a solid drill comprising a drill body, a drill tip, a drill stock, a chip room, and a cutting lip. The utility model is characterized in that the chip room consists of a beeline surface, a first concave surface, a second concave surface extending from the first concave surface, a third concave surface extending from the second concave surface and a convex surface extending from the third concave surface. The modified structure not only guarantees the enough strength for the cutting lip, but also reduces the cutting force, controls the coiling chip, breaking chip and removing chip, and realizes the smooth and stable drilling, so the cutting ability is good, and the durable property is high.
Description
Technical field
The utility model relates to the architecture advances of solid drill.
Background technology
Drilling occupies crucial status in the manufacturing field, it is one of most important operation in the metal cutting processing, accounts for 33% of all metal cutting manufacturing procedures.In machining, especially processing accounts in the manufacturing industry of important proportion in holes such as automobile and aviations, and the application of solid carbide twist drill is very extensive.The main sword of drill bit is intersected by chip area and back and forms, and participates in the cutting to metal directly, and crucial effects is played in the formation and the discharge of smear metal.The main sword of drill bit is intersected by flute helicoid and back and forms.Main sword is participated in the cutting to metal directly, has determined cutting deformation and working angles, and crucial effects is played in the formation and the discharge of smear metal.Common fluted drill all adopts identical bathtub construction at different materials, work in-process, and the speed that main sword is long, the wide each point smear metal of smear metal is flowed out differs greatly, chip curling becomes wide spiral shell volume, shared spatial volume is big, causes chip removal not smooth, has influence on the service life of drill bit.For solving this deficiency, fluted drill many improvement have been carried out both at home and abroad.Wherein belong at fluted drill and laterally cut improved mainly containing aspect the shape:
1, Chinese patent application 87103846.3 has proposed a kind of drill bit in (open day on July 19th, 1989), and the shape of cutting of cutting shape and crushing of its tooth shape, back knife face is carried out optimal design by computer.Because this drill bit anterior angle increases, distribute rationally, cutting force descends, the torque ratio unit-type drill head descends 10%～30%, and axial force descends 67%～80%, so this drill bit is easy to pierce workpiece, the work efficiency height, energy consumption is little, is suitable for the drilling of mild steel, cast iron and non-ferrous metal.Simultaneously, also, make cutting edge too sharp, cause undercapacity, in use be prone to tipping because this drill bit master sword every bit anterior angle reaches the maximal rake angle that this point can reach.
2, Chinese patent ZL 89211929.2 discloses a kind of drill bit in (August 8 nineteen ninety Granted publication day), and the rake face of its two spirality chip areas is a concave curved surface shape, and it is concave arc shape sword that rake face intersects two main cutting edges that form with main back knife face.The smear metal of being downcut when drilling is cut the rectangular cross section that forms by linear master cutting drill and is become the cross section smear metal of concave arc shape, and the basic distortion of smear metal increases, and it is just broken only need to make it produce small additional deformation, has improved the chip-breaking performance of drill bit significantly.But this drill bit master tooth shape shape does not have full curveization, and service life is short partially.
3, among the Japanese patent application No.Hei 4-46690 (publication number for the second time) a kind of drill bit is disclosed, the outer shape of cutting edge is a convex in this drill bit, promptly when when the rotation direction is seen, being V-arrangement, and this drill bit tilts towards the direction opposite with the drill bit direction of rotation a little near peripheral that part of cutting edge, by and the marginal portion between angle be arranged to an obtuse angle, avoid cutting edge appearance breakage or polish assurance drill main body intensity.The smear metal that cutting edge produces can be damaged at place, V-arrangement tip, reduces the crimp property of smear metal, and the obstruction chip area is twined in damaged smear metal meeting each other, and influence is used.
4, Chinese patent ZL 01267227.0 discloses a kind of drill bit in (July 10 2002 Granted publication day), the flute profile angle that main cutting edge and the ditch back side form is open V-arrangement on the cross section perpendicular to the drill lip helix of drill bit, the ditch back side and with between its adjacent little exterior arc surface with the cambered surface transition.Thereby this drill bit makes smear metal become vertical bar successfully successfully to be discharged by the groove passage along the relatively more even chip deformation of thickness distribution of main cutting edge when processing work, the while cutting fluid also can arrive cutting point swimmingly cutting region is fully cooled off, simultaneously the torsional strength height.This drill bit only is suitable for the drilling of hardness at materials such as the ferrous alloy of HRC30～HRC45, mould steel.
5, in the drill bit of Chinese patent ZL02119816.0 (October 19 2005 the Granted publication day) patent No., a kind of drill bit is disclosed, in this drill bit, cutting edge comprises a protruding cutting edge and the indent cutting edge that begins level and smooth extension from this projection cutting edge towards peripheral direction.Carry out drilling with this drill bit and add man-hour, smear metal is generally curling and can discharges glibly, and can not abut against excessively on the wall surface of chip area, smear metal can be discharged smoothly.This drill main body is subjected to frictional resistance seldom, makes drill main body wearing and tearing reduce and the driving torque that is used for drilling reduces.Cutting edge on the periphery and the angle between the marginal portion are arranged to an obtuse angle, guarantee drill main body intensity.
Summary of the invention
The utility model is at above-mentioned deficiency, a kind of solid drill is provided, both guaranteed that cutting edge obtained enough intensity, especially on the periphery of this cutting edge, make the reduction of cutting force, improve the chip area structure simultaneously, volume bits, chip breaking, chip removal in the boring procedure have rationally been controlled, realized level and smooth and stable drilling.
In order to realize the purpose of this utility model, described solid drill comprises: the drill main body that can rotate around rotation, and this main body comprises apex point and a shank; Chip area on the periphery of aforementioned body, this chip area extends from the shank of described apex point to described drill main body; And a cutting edge, this cutting edge is to intersect and form to the back knife face of the wall surface of drill bit direction of rotation and this drill main body in the middle of this chip area; It is characterized in that, described chip area by a planarea that connects successively, one towards the first recessed concave surface of peripheral direction, one from level and smooth second concave surface that extends of first concave surface, one form from the level and smooth convex surface that extends of the 3rd concave surface from level and smooth the 3rd concave surface that extends of second concave surface and one.
Planarea is projected as a straight line AB at the cross section perpendicular to described rotation, planarea is projected as a straight line AB at the cross section perpendicular to described rotation, its length is 0.15mm～0.3mm, and is 90 °～100 ° with crossing cylindrical envelope face that A orders at the angle β perpendicular to the tangent line of the cross section projection of described rotation
First concave surface is projected as a circular arc at the cross section perpendicular to described rotation, this circular arc is by a C, described some C is as giving a definition: do not comprise apex point, perpendicular to as described in arbitrary cross section of rotation, chip area is not with the subpoint and the subpoint of drill axis in this cross section of sharpening back of the body intersecting lens are respectively H, O point, with the A point is the center of circle, a drill bit radius R of/4th is that radius is justified, the C point is on this circular arc and ∠ OAC=-6 °～+ 12 °, described C point for just, is negative away from main body one side in close main body one side of OA line; The arc length that makes arc BD be the drill main body diameter d (0.22～0.27) doubly; The action h of arc BD is 0.01～0.02mm.
Unbearable diameter d
2For (0.15～0.30) of drill main body diameter d doubly.
Second concave surface is tangential on the D point in the cross section projection perpendicular to described rotation with first concave surface, and is tangential on E with unbearable place circle
1, smoothly extend circular arc DE
1To putting E, E point and O point distance are unbearable diameter d
2(1.10～1.20) doubly.
The 3rd concave surface is tangential on E point, its radius of curvature R in the cross section projection perpendicular to described rotation with second concave surface
3Value be the drill main body diameter d (0.30～0.38) doubly.
Convex surface is in the cross section projection perpendicular to described rotation, radius of curvature R
4Value be the drill main body diameter d (0.10～0.15) doubly and tangent with the 3rd concave surface, end at the H point.
∠ AOH value is 80 °～110 °.
Because unbearable diameter d
2For (0.15～0.30) of drill main body diameter d doubly, the angle of planarea AB and marginal portion is not less than 90 °, and ∠ AOH value is 80 °～110 °, makes drill bit, blade tip can obtain enough intensity.Chip area is made up of first concave surface, second concave surface, the 3rd concave surface and the convex surface of smooth connection successively, the whole piece smear metal can well be curled and along planarea, first concave surface, second concave surface and the 3rd concave surface during cutting, be directed to convex surface and discharge glibly, frictional resistance is little, has reduced the wearing and tearing and the moment of torsion of drill bit.
In the contrast experiment of drill thrust, the drill bit axial cutting force after the improvement reduces by 10%～20%, and is stable in the drilling process, and the chip breaking major part is good short spiral shell volume bits; In boring wearing and tearing contrast, under the identical machining condition, the drill bit wear of the tool flank after the improvement is less, and increase service life.
The utility model has improved the solid drill structure, has reduced cutting force, reasonably control volume bits and chip breaking, have rational in infrastructure, excellent cutting performance, the advantage that durability is high.
Description of drawings
Fig. 1 is an overall schematic of the present utility model;
Fig. 2 is the A-A cutaway view Amplified image of Fig. 1;
Fig. 3 is that the K of Fig. 1 is to zoomed-in view.
The specific embodiment
As shown in Figure 1, solid drill of the present utility model comprises: one can be around the drill main body 10 of rotation 14 rotations, and this main body comprises apex point 8 and a shank 9, chip area 7 on the periphery of main body 10, this chip area extends from the shank 9 of described apex point to described drill main body 10; And a cutting edge 11, this cutting edge is to intersect and form to the back knife face 13 of the wall surface 12 of drill bit direction of rotation T and this drill main body 10 in the middle of this chip area 7.Of the present utility model being characterised in that: chip area 7 by a planarea connecting successively 1, one towards the first recessed concave surface 2 of peripheral direction, one from first concave surface 2 level and smooth second concave surface 3 that extends, one form from the 3rd concave surface 4 level and smooth convex surfaces 5 that extend from second concave surface, 3 level and smooth the 3rd concave surfaces 4 that extend and one.
As shown in Figure 2, planarea 1 is projected as a straight line AB at the cross section perpendicular to described rotation 14, chip area 7 is A with the subpoint of land 14 intersecting lenses, straight line AB length is 0.15mm～0.3mm, and is 90 °～100 ° with crossing cylindrical envelope face that A orders at the angle β perpendicular to the tangent line of the cross section projection 6 of described rotation.
In not comprising arbitrary cross section apex point 8, perpendicular to described rotation 14, chip area 7 is respectively H, O point with subpoint and the subpoint of drill bit rotation 14 in this cross section that sharpening is not carried on the back 15 intersecting lenses, with the A point is the center of circle, a drill bit radius R of/4th is that radius is justified, the C point is on this circular arc and ∠ OAC=α=and-6 °～+ 12 °, the C point for just, is negative away from main body one side in close main body one side of OA line.First concave surface 2 is projected as a circular arc at the cross section perpendicular to described rotation 14, and this circular arc is by a C.The level and smooth arc BC that prolongs is to putting the projection circular arc that D forms first concave surface 2, and the chord length that makes arc BD is 0.22d～0.27d; The action of arc BD is 0.01～0.02mm.Make ∠ AOH=θ, value is 80 °～110 °.
Unbearable diameter d
2For (0.15～0.30) of drill main body 10 diameter d doubly.
Second concave surface 3 is tangential on the D point in the cross section projection perpendicular to described rotation 14 with first concave surface 2, and is tangential on E with unbearable place circle
1, smoothly extend circular arc D E
1To putting E, E point and O point distance are unbearable diameter d
2(1.10～1.20) doubly.
The 3rd concave surface 4 is tangential on the round points of tangency of 3 cross section projections of second concave surface and unbearable place, its radius of curvature R in the cross section projection perpendicular to described rotation 14 with second concave surface 3
3Value be (0.30～0.38) times drill main body 10 diameter d.
Convex surface 5 is in the radius of curvature R perpendicular to the cross section projection of described rotation 14
4Value be (0.10～0.15) times drill main body 10 diameter d and tangent with the 3rd concave surface, and end at the H point.
Because unbearable diameter d
2For (0.15～0.30) of drill main body diameter d doubly, the angle of planarea AB and marginal portion is not less than 90 °, and ∠ AOH value is 80 °～110 °, makes drill bit, blade tip can obtain enough intensity, avoids drill bit appearance breakage or polishes.This chip area is made up of first concave surface, second concave surface, the 3rd concave surface and the convex surface of smooth connection successively, the whole piece smear metal can well be curled and along planarea, first concave surface, second concave surface and the 3rd concave surface during cutting, be directed to convex surface and discharge glibly, can exceedingly not abut against on the tail wall surface of chip area, thereby frictional resistance is little, has reduced the wearing and tearing of drill bit and has rotated needed moment of torsion.
Carbide alloy solid drill of the present utility model with diameter 12mm, drilling 42CrMo (HRC 38), cool off with 5% concentration cooling fluid, cutting speed is 75m/min, amount of feeding 0.25mm/r, drilling depth is 35mm, the result: the drill bit axial cutting force has reduced by 10%～20% before improving, stable in the drilling process, the chip breaking major part is good short spiral shell volume bits; This drill bit is after 1000 of borings, and the about 0.25mm of its wear of the tool flank can also continue to use.This drill bit working (machining) efficiency height, long service life.
The utility model can adopt various material, as carbide alloy.This flute of drill adopts forming grinding wheel to be formed by method of forming grinding, and planarea chamfered edge on the basis of forming grinding wheel grinding is realized; Chisel edge is partly adopted " cross " reconditioning, near brill core both sides, formed the thinner wall section of a V-arrangement after the reconditioning, formed two inner edges, shortened chisel edge, increased the chisel edge anterior angle, also strengthened drill bit centering stability simultaneously with the back is crossing.Whole process is suitable for producing in enormous quantities.
Claims (8)
1, a kind of solid drill comprises:
One can be around the drill main body (10) of rotation (14) rotation, and this main body comprises an apex point (8) and a shank (9);
Chip area (7) on the periphery of aforementioned body (10), this chip area extends from the shank (9) of described apex point (8) to described drill main body (10); And
A cutting edge (11), this cutting edge are to intersect and formation to the back knife face (13) of the wall surface (12) of drill bit direction of rotation T and this drill main body (10) in the middle of this chip area (7);
It is characterized in that, described chip area (7) by a planarea (1) that connects successively, one towards recessed first concave surface (2) of peripheral direction, one from level and smooth second concave surface (3) that extends of first concave surface (2), one form from level and smooth the 3rd concave surface (4) that extends of second concave surface (3) and a convex surface (5) from the level and smooth extension of the 3rd concave surface (4).
2, solid drill according to claim 1, it is characterized in that, chip area (7) is A with the subpoint of land (14) intersecting lens, planarea (1) is projected as a straight line AB at the cross section perpendicular to described rotation (16), its length is 0.15mm～0.3mm, and is 90 °～100 ° with crossing cylindrical envelope face that A orders at the angle β perpendicular to the tangent line of the cross section projection (6) of described rotation (14).
3, solid drill according to claim 1 and 2, it is characterized in that, first concave surface (2) is projected as a circular arc at the cross section perpendicular to described rotation (14), this circular arc is by a C, described some C is as giving a definition: do not comprising apex point (8), in arbitrary cross section perpendicular to described rotation (14), chip area (7) is not with the subpoint and the subpoint of drill bit rotation (14) in this cross section of the sharpening back of the body (15) intersecting lens are respectively H, the O point, with the A point is the center of circle, a drill bit radius R of/4th is that radius is justified, the C point is on this circular arc and ∠ OAC=-6 °～+ 12 °, described C point for just, is negative away from main body one side in close main body one side of OA line; The level and smooth arc BC that prolongs is to putting the projection circular arc that D forms first concave surface (2), the chord length that makes arc BD be the drill main body diameter d (0.22～0.27) doubly; The action h of arc BD is 0.01～0.02mm.
4, solid drill according to claim 1 is characterized in that, unbearable diameter d
2For (0.15～0.30) of drill main body (10) diameter d doubly.
5, solid drill according to claim 3 is characterized in that, second concave surface (3) is tangential on the D point in the cross section projection perpendicular to described rotation (14) with first concave surface (2), and is tangential on E with unbearable place circle
1, smoothly extend circular arc D E
1To putting E, E point and O point distance are unbearable diameter d
2(1.10～1.20) doubly.
6, solid drill according to claim 5 is characterized in that, the 3rd concave surface (4) is tangential on E point, its radius of curvature R in the cross section projection perpendicular to described rotation (14) with second concave surface (3)
3Value be drill main body (10) diameter d (0.30～0.38) doubly.
7, solid drill according to claim 6 is characterized in that, convex surface (5) is in the cross section projection perpendicular to described rotation (14), radius of curvature R
4Value be drill main body (10) diameter (0.10～0.15) doubly and tangent with the 3rd concave surface (4), end at the H point.
8, solid drill according to claim 3 is characterized in that, ∠ AOH value is 80 °～110 °
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620050587 CN2873376Y (en) | 2006-04-07 | 2006-04-07 | Integrated drill bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620050587 CN2873376Y (en) | 2006-04-07 | 2006-04-07 | Integrated drill bit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2873376Y true CN2873376Y (en) | 2007-02-28 |
Family
ID=37779965
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620050587 Expired - Lifetime CN2873376Y (en) | 2006-04-07 | 2006-04-07 | Integrated drill bit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2873376Y (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102814535A (en) * | 2012-08-02 | 2012-12-12 | 泰兴市信达克刀具有限公司 | Solid carbide drill chip breaker groove for steel part and design method thereof |
| CN102922010A (en) * | 2012-11-27 | 2013-02-13 | 西安工业大学 | Self-lubricating twist drill and machining method thereof |
| CN104117715A (en) * | 2013-04-25 | 2014-10-29 | 佑能工具株式会社 | Drilling tool |
| CN106271490A (en) * | 2016-08-27 | 2017-01-04 | 杭州比诺精密工具有限公司 | The preparation method of rustless steel whole hard alloy tricuspid step drill cutter |
| JP2017124475A (en) * | 2016-01-15 | 2017-07-20 | 三菱日立ツール株式会社 | drill |
| CN107052408A (en) * | 2017-01-10 | 2017-08-18 | 深圳市金洲精工科技股份有限公司 | Boring bar tool |
| CN110076375A (en) * | 2019-05-05 | 2019-08-02 | 厦门金鹭特种合金有限公司 | A kind of monoblock type fluted drill |
| CN113146734A (en) * | 2021-04-12 | 2021-07-23 | 深圳市金洲精工科技股份有限公司 | Novel drill bit |
-
2006
- 2006-04-07 CN CN 200620050587 patent/CN2873376Y/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102814535A (en) * | 2012-08-02 | 2012-12-12 | 泰兴市信达克刀具有限公司 | Solid carbide drill chip breaker groove for steel part and design method thereof |
| CN102922010A (en) * | 2012-11-27 | 2013-02-13 | 西安工业大学 | Self-lubricating twist drill and machining method thereof |
| CN102922010B (en) * | 2012-11-27 | 2014-09-17 | 西安工业大学 | Self-lubricating twist drill and machining method thereof |
| CN104117715A (en) * | 2013-04-25 | 2014-10-29 | 佑能工具株式会社 | Drilling tool |
| CN104117715B (en) * | 2013-04-25 | 2016-09-21 | 佑能工具株式会社 | Boring bar tool |
| JP2017124475A (en) * | 2016-01-15 | 2017-07-20 | 三菱日立ツール株式会社 | drill |
| CN106271490A (en) * | 2016-08-27 | 2017-01-04 | 杭州比诺精密工具有限公司 | The preparation method of rustless steel whole hard alloy tricuspid step drill cutter |
| CN107052408A (en) * | 2017-01-10 | 2017-08-18 | 深圳市金洲精工科技股份有限公司 | Boring bar tool |
| CN110076375A (en) * | 2019-05-05 | 2019-08-02 | 厦门金鹭特种合金有限公司 | A kind of monoblock type fluted drill |
| CN113146734A (en) * | 2021-04-12 | 2021-07-23 | 深圳市金洲精工科技股份有限公司 | Novel drill bit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN2873376Y (en) | Integrated drill bit | |
| KR102211830B1 (en) | Multi-blade ball end mill | |
| EP0814932B1 (en) | Helical cutting insert with offset cutting edges | |
| JP3720010B2 (en) | Deep hole drill | |
| AU2004284049C1 (en) | Cutting insert for high feed face milling | |
| JP5719938B2 (en) | drill | |
| RU2277458C2 (en) | Drill | |
| KR101526642B1 (en) | Multiple edge drill | |
| JP5539913B2 (en) | Cooling channel structure | |
| CN103328142A (en) | End mill for cutting of high-hardness materials | |
| JPWO2005102572A1 (en) | Ball end mill | |
| WO2018037804A1 (en) | Cutting insert, and indexable rotational cutting tool | |
| CN101912987A (en) | Drill bit for processing deep hole with large length-diameter ratio | |
| JPH0632250Y2 (en) | Drill | |
| US6238151B1 (en) | Drilling tool and throw-away tip for use in drilling work | |
| CN1695851A (en) | Turning insert | |
| CN1557594A (en) | Cutting blade for machining screw thread | |
| EP1053814A2 (en) | Cutting tooth | |
| JPS5822283B2 (en) | drilling tool | |
| CN214108931U (en) | Combined type twist drill | |
| JP4725369B2 (en) | Drill | |
| CN108723453B (en) | End milling cutter with wave-shaped edge | |
| JPH01252307A (en) | Hard sintered body tool for interrupted cutting | |
| JPH07246508A (en) | End mill for processing high strength material | |
| JP3657546B2 (en) | drill |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20070228 |
|
| EXPY | Termination of patent right or utility model |