CN105499662A - Logarithmic spiral conical section drill bit - Google Patents
Logarithmic spiral conical section drill bit Download PDFInfo
- Publication number
- CN105499662A CN105499662A CN201610052921.1A CN201610052921A CN105499662A CN 105499662 A CN105499662 A CN 105499662A CN 201610052921 A CN201610052921 A CN 201610052921A CN 105499662 A CN105499662 A CN 105499662A
- Authority
- CN
- China
- Prior art keywords
- logarithmic spiral
- drill bit
- helical angle
- cutting edge
- conical section
- 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.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B51/00—Tools for drilling machines
-
- 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
- B23B51/0027—Drills for enlarging a hole by tool swivelling
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2251/00—Details of tools for drilling machines
- B23B2251/14—Configuration of the cutting part, i.e. the main cutting edges
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2251/00—Details of tools for drilling machines
- B23B2251/40—Flutes, i.e. chip conveying grooves
- B23B2251/408—Spiral grooves
Abstract
The invention relates to drill bits, in particular to a logarithmic spiral conical section drill bit which comprises a toolbar and a shank. The toolbar comprises a cutting portion, a counter-boring portion and a guiding portion. The logarithmic spiral conical section drill bit with the structure has the advantages that the strength and the rigidity of the toolbar can be improved, the chip removal speeds can be increased, the chip removal smoothness can be improved, and blockage can be prevented; the rotational speeds of the drill bit can be increased, accordingly, the machining speeds can be increased, and the machining precision and the machining production efficiency can be improved; the problem of breakage of existing toolbars during machining due to excessively high local temperatures of existing helical angle drill bits can be solved, and the logarithmic spiral conical section drill bit can be used for machining deep holes.
Description
Technical field
The present invention relates to drill bit, particularly relate to a kind of logarithmic spiral conical section drill bit.
Technical background
Drill bit is instrument common in our machinery production processing, the cutting slot of the drill bit of present main flow is equal helix angle and uniform pitch form, mainly there is following problem in the drill bit of this kind of form: first, in the process of boring, waste discharge bits not easily, can gather amount of heat causes temperature to raise, and then impels broken drill.The second, this kind of drill bit is because easily fracture, so rotating speed is lower, not easily run up, processing parts efficiency is lower.So be necessary to invent a kind of novel logarithmic spiral conical section drill bit, this drill bit not only can carry out Drilling operation equally, and the shortcoming of conventional drill can be overcome, for deep hole processing, facilitate the development of mechanical processing industry, and may be used for requiring higher mining to drill bit intensity and wearability and excavating industry.
Summary of the invention
The object of the present invention is to provide a kind of logarithmic spiral conical section drill bit, this drill bit strengthens the intensity of chip removal speed and fluency and drill bit, avoids drill bit blocking, improves process velocity and precision.
Technical solution;
The present invention includes: targeting part, cutting tip are provided with expansion and cut part between described targeting part and cutting tip, described expansion is cut part and is had cone segments, cone segments outer surface is provided with the logarithmic spiral cutting edge be connected with the screw pair blade of targeting part and the main cutting edge of cutting tip, logarithmic spiral cutting edge is according to the formal distribution of conical log-spiral line in cone, and the helical angle at log spiral any point place is on line equal.
The helical angle formed with targeting part central axis after the helix of the cutting slot outer most edge of described targeting part is launched into straight line incrementally changes from bottom to up: with near expand the helical angle of cutting part logarithmic spiral cutting edge for starting point to the helical angle at targeting part top 25
0-35
0according to spirality isogonism mode uniform increments in scope.
The axis that described targeting part, expansion cut part and cutting tip is same central axis, and logarithmic spiral cutting edge, auxiliary-blade and main cutting edge are connected smoothly, and the value of logarithmic spiral cutting edge and main cutting edge helical angle is 25
0, the initial value of auxiliary-blade place helical angle is 25
0.
Described targeting part helical angle changes according to following rule, the Changing Pattern of helical angle: β=25
0+ 1.5t, wherein: the length L that the value of 0 < t < 1, t is divided according to drill guide determines, L is larger, then the value of t is less, finally makes helical angle 25
0< β < 35
0change in scope.
The present invention includes two parts, is knife bar and handle of a knife respectively, and wherein knife bar comprises cutting tip, expands and cut part and targeting part.Wherein cutting tip is made up of two main cutting edges, and two main cutting edges are symmetrically distributed in apex point both sides about drill axis; Expand to cut and be partly made up of the logarithmic spiral cutting edge in cone and its, logarithmic spiral cutting edge is that the formal distribution of blade according to conical log-spiral line is in cone, log spiral has the equal feature of the helical angle at any point place on line, drill bit of the present invention is in the process of cutting, the stressed size of cutting edge is according to the size variation of helical angle, so cutting edge uniform force of the present invention, greatly strengthen the intensity of drill bit.The design of cone in addition, makes singlely to be born the load adding man-hour by main cutting edge, changes into and shares fractional load by expanding the logarithmic spiral cutting edge cutting part, reduce the degree of wear of main cutting edge, extend the service life of drill bit.Targeting part is by the rising trace of regulation cutting slot, it is made to be evenly distributed on knife bar according to the form waiting angle to increase progressively circular helix, the helical angle of cutting slot increases gradually in this process, compared with the drill bit identical with maximum helix angle of the present invention, not only increase the intensity of knife bar, and strengthen speed and the fluency of chip removal, not easily produce blocking, can improve the rotating speed of drill bit, the benefit brought improves the speed of processing, precision and production efficiency.The local temperature simultaneously avoiding the appearance of equal helix angle drill bit is too high, and then impels knife bar in the generation adding breakage phenomenon in man-hour.In machining, during gun drilling, heat radiation and chip removal difficulty.Chip space of the present invention is large, and cooling fluid easily arrives apex point, and lubrication is effective, can be applied to deep hole machining.
Accompanying drawing explanation
Fig. 1 logarithmic spiral conical section of the present invention drill bit structure schematic diagram;
1 cutting tip, 2 expansions cut part, 3 targeting parts, 4 knife bars, 5 handle of a knifes, 6 cutting slots, and 7 angles such as grade increase progressively circular helix, 8 logarithmic spiral cutting edges, 9 cones, 10 apex points.
Detailed description of the invention
Logarithmic spiral conical section drill bit of the present invention comprises knife bar 4 and handle of a knife 5, wherein knife bar 4 has cutting tip 1, expands and cut part 2 and targeting part 3.Wherein cutting tip 1 is made up of two main cutting edges, and two main cutting edges are symmetrically distributed in apex point 10 both sides about drill axis; Expand and cut part 2 and be made up of the logarithmic spiral cutting edge 8 in cone 9 and its, logarithmic spiral cutting edge 8 be the formal distribution of blade according to conical log-spiral line in cone 9, log spiral has all equal feature of the helical angle at any point place on line; Targeting part 3 is provided with cutting slot 6, and the cutting slot 6 on described targeting part 3 forms circular helix 7 according to expanding the helical angle of cutting part 2 logarithmic spiral cutting edge 8 to targeting part 3 top in the mode that spirality isogonism increases progressively.
Described logarithmic spiral conical section drill bit, expands the value of cutting the logarithmic spiral cutting edge 8 of part 2 and the main cutting edge helical angle of cutting tip 1 and is 25
0, the initial value of auxiliary-blade place helical angle is 25
0.
Described targeting part 3 helical angle incremental manner: with near expand the helical angle of cutting part 2 logarithmic spiral cutting edge 8 place for starting point to the helical angle at targeting part 3 top 25
0-35
0according to spirality isogonism mode uniform increments in scope.
Described logarithmic spiral conical section drill bit, targeting part 3 helical angle changes according to following rule, the Changing Pattern of helical angle: β=25
0+ 1.5t, wherein: the value of 0 < t < 1, t divides the length L of 2 to determine according to drill guide, and L is larger, then the value of t is less, finally makes helixangleβ 25
0< β < 35
0change in scope.
When carrying out drilling processing, handle of a knife 5 is inserted the PTO of drilling machine.Switch on power, open drilling machine switch, main shaft is rotated, drive bit, then cutting tip 1 apex point 10 is moved to the drilling equipment that workpiece is specified, open locking switch, drill bit is vertically holed along axis, along with going deep into of drill bit, expand the process that the logarithmic spiral cutting edge 8 cut in part 2 will add drilling, share the load on cutting tip 1 major cutting edge.Then drill bit continues deeply, targeting part 3 enters duty, at this moment hole produce waste material, can discharge smoothly along cutting slot 6, the heat produced also can be taken out of thereupon, avoid local temperature too high, cause the risk that knife bar 4 fractures, precision and the speed of processing can be improved simultaneously by the rotating speed improving drill bit.
Claims (4)
1. logarithmic spiral conical section drill bit, comprise: targeting part, cutting tip, it is characterized in that, between described targeting part and cutting tip, be provided with expansion cut part, described expansion is cut part and is had cone segments, cone segments outer surface is provided with the logarithmic spiral cutting edge be connected with the auxiliary-blade of targeting part and the main cutting edge of cutting tip, and logarithmic spiral cutting edge is according to the formal distribution of conical log-spiral line in cone, and the helical angle at conical log-spiral line any point place is on line all equal.
2. logarithmic spiral conical section drill bit according to claim 1, it is characterized in that, the helical angle formed with targeting part central axis after the helix of the cutting slot outer most edge of targeting part is launched into straight line incrementally changes from bottom to up: with near expand the helical angle of cutting part logarithmic spiral cutting edge for starting point to the helical angle at targeting part top 25
0-35
0according to spirality isogonism mode uniform increments in scope.
3. logarithmic spiral conical section drill bit according to claim 1 and 2, it is characterized in that, the axis that targeting part, expansion cut part and cutting tip is same central axis, logarithmic spiral cutting edge, auxiliary-blade and main cutting edge are connected smoothly, and the value of logarithmic spiral cutting edge and main cutting edge helical angle is 25
0, the initial value of auxiliary-blade place helical angle is 25
0.
4. logarithmic spiral conical section drill bit according to claim 2, it is characterized in that, targeting part helical angle changes according to following rule, the Changing Pattern of helical angle: β=25
0+ 1.5t, wherein: the length L that the value of 0 < t < 1, t is divided according to drill guide determines, L is larger, then the value of t is less, finally makes helical angle 25
0< β < 35
0change in scope.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610052921.1A CN105499662A (en) | 2016-01-27 | 2016-01-27 | Logarithmic spiral conical section drill bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610052921.1A CN105499662A (en) | 2016-01-27 | 2016-01-27 | Logarithmic spiral conical section drill bit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105499662A true CN105499662A (en) | 2016-04-20 |
Family
ID=55708173
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610052921.1A Pending CN105499662A (en) | 2016-01-27 | 2016-01-27 | Logarithmic spiral conical section drill bit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105499662A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110497002A (en) * | 2019-10-06 | 2019-11-26 | 李吴军 | A kind of pressure reaming bit certainly |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003205404A (en) * | 2002-01-11 | 2003-07-22 | Mitsubishi Materials Kobe Tools Corp | Surface-coated cemented carbide cutting tool capable of demonstrating excellent wear resistance when cutting hardly machinable material at high speed |
| WO2010106117A1 (en) * | 2009-03-19 | 2010-09-23 | EMUGE-Werk Richard Glimpel GmbH & Co. KG Fabrik für Präzisionswerkzeuge | Modular drill |
| CN103362444A (en) * | 2013-07-24 | 2013-10-23 | 中国地质大学（武汉） | Drill for cutting-grinding wing type oil and gas drilling |
| CN204075316U (en) * | 2014-09-16 | 2015-01-07 | 台州华达工量具制造有限公司 | A kind of spiral bit |
| CN204159939U (en) * | 2014-09-23 | 2015-02-18 | 浙江北工工具有限公司 | A kind of fluted drill |
| CN204277009U (en) * | 2014-11-24 | 2015-04-22 | 广州市升华实业有限公司 | A kind of high speed steel twist drill |
| CN204545510U (en) * | 2015-02-04 | 2015-08-12 | 森泰英格（成都）数控刀具有限公司 | Be convenient to the drill bit of chip removal |
-
2016
- 2016-01-27 CN CN201610052921.1A patent/CN105499662A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003205404A (en) * | 2002-01-11 | 2003-07-22 | Mitsubishi Materials Kobe Tools Corp | Surface-coated cemented carbide cutting tool capable of demonstrating excellent wear resistance when cutting hardly machinable material at high speed |
| WO2010106117A1 (en) * | 2009-03-19 | 2010-09-23 | EMUGE-Werk Richard Glimpel GmbH & Co. KG Fabrik für Präzisionswerkzeuge | Modular drill |
| CN103362444A (en) * | 2013-07-24 | 2013-10-23 | 中国地质大学（武汉） | Drill for cutting-grinding wing type oil and gas drilling |
| CN204075316U (en) * | 2014-09-16 | 2015-01-07 | 台州华达工量具制造有限公司 | A kind of spiral bit |
| CN204159939U (en) * | 2014-09-23 | 2015-02-18 | 浙江北工工具有限公司 | A kind of fluted drill |
| CN204277009U (en) * | 2014-11-24 | 2015-04-22 | 广州市升华实业有限公司 | A kind of high speed steel twist drill |
| CN204545510U (en) * | 2015-02-04 | 2015-08-12 | 森泰英格（成都）数控刀具有限公司 | Be convenient to the drill bit of chip removal |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110497002A (en) * | 2019-10-06 | 2019-11-26 | 李吴军 | A kind of pressure reaming bit certainly |
| CN110497002B (en) * | 2019-10-06 | 2020-08-04 | 杭州长三角工贸有限公司 | Self-pressing reaming drill bit |
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Legal Events
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160420 |
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| WD01 | Invention patent application deemed withdrawn after publication |