CN106077767B - There is the chip-breaking drill bit of S type blades based on Logistic curves - Google Patents
There is the chip-breaking drill bit of S type blades based on Logistic curves Download PDFInfo
- Publication number
- CN106077767B CN106077767B CN201610602257.3A CN201610602257A CN106077767B CN 106077767 B CN106077767 B CN 106077767B CN 201610602257 A CN201610602257 A CN 201610602257A CN 106077767 B CN106077767 B CN 106077767B
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- China
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- chip
- drill bit
- main cutting
- cutting edge
- logistic
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B51/00—Tools for drilling machines
- B23B51/02—Twist drills
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2200/00—Details of cutting inserts
- B23B2200/32—Chip breaking or chip evacuation
- B23B2200/328—Details of chip evacuation
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Drilling Tools (AREA)
Abstract
A kind of chip-breaking drill bit based on Logistic curves with S type blades, with shank and cutting portion, cutting portion includes a chisel edge, two main cutting edges, two front cutting edges and chip pocket, main cutting edge includes rake face and rear knife face forms, and each point meets Logistic curvilinear equation y=1/ (1+2e on main cutting edgex), anterior angle and relief angle at the main cutting edge outer rim are respectively 15 ° and 8 °.The drift angle of the cutting portion is 135 °.The chisel edge length is 0.6mm.The helical angle of the front cutting edge is 40 °.The drill bit is based on Logistic curves, pass through the configuration to drill bit main cutting edge blade type and structural parameters, effectively facilitate chip in drilling process to bend, increase chip deformation degree, improve cutter chip breaking ability, easily produce interrupted unit chip, prevent chip from winding, chip is smoothly discharged, ensure crudy, processing efficiency is improved, extends cutter life.
Description
Technical field
The present invention relates to a kind of chip-breaking drill bit being used for titanium alloy workpiece Drilling operation, belongs to drilling cutters technology neck
Domain.
Background technology
With developing rapidly for the fields such as Aero-Space, auto industry, medicine equipment, petrochemical industry, to the performance of material
It is required that more and more higher, titanium alloy is because its own specific strength is high, hardness is high, the excellent properties such as corrosion-resistant are widely used.But by
In titanium alloy chemism is high, modulus of elasticity is small, thermal conductivity factor is low the features such as, easily cause that tool wear is serious, cutting temperature
The problems such as high, chip easily twines knife, belongs to typical difficult-to-machine material, is semi-enclosed processing especially in drilling process, chip
If unreasonable fracture and smoothly discharge, chip pocket blocking is easily caused, increases cutting resistance；Coolant can not timely enter processing
Region, influence drill bit cooling effect；Caused heat sharply increases, and reduces tool life, destroys machined surface quality, sternly
Ghost image rings processing efficiency and processing cost.
The content of the invention
In order to overcome existing drill bit structure in existing chip breaking hardly possible, easy the problems such as twining knife, this hair during Ti-alloy Drilling
A kind of bright rigidity of offer is good, cutter life is long, chip breaking chip removal performance is good has the disconnected of S type blades based on Logistic curves
Consider drill bit to be worth doing.
The chip-breaking drill bit based on Logistic curves with S type blades of the present invention, using following technical scheme：
The drill bit, has shank and cutting portion, and cutting portion includes a chisel edge, two main cutting edges, two front cutting edges
And chip pocket, main cutting edge include rake face and rear knife face, each point meets Logistic curvilinear equations y=1/ (1 on main cutting edge
+2ex), using the outer rim blade tip line of two main cutting edges as x-axis, central axis is y-axis, and the intersection point of x-axis and y-axis is origin.
Anterior angle and relief angle at the main cutting edge outer rim are respectively 15 ° and 8 °.
The drift angle of the cutting portion is 135 °.
The chisel edge length is 0.6mm.
The helical angle of the front cutting edge is 40 °.
The present invention is based on Logistic curves, by the configuration to drill bit main cutting edge blade type and structural parameters, effectively promotees
Enter chip in drilling process to bend, increase chip deformation degree, improve cutter chip breaking ability, easily produce interrupted unit and cut
Bits, prevent chip from winding, chip is smoothly discharged, and ensure crudy, improve processing efficiency, extend cutter life.
Brief description of the drawings
Fig. 1 is the structural representation of the chip-breaking drill bit based on Logistic curves with S type blades.
Fig. 2 is Fig. 1 left view.
Fig. 3 is the cutting portion schematic diagram with S type blade type apex points.
In figure：1. shank, 2. cutting portions, 3. chisel edges, 4. main cutting edges, 5. front cutting edges, 6. chip pockets.
Embodiment
The chip-breaking drill bit based on Logistic curves with S type blades of the present invention, material is hard alloy, and its structure is such as
Shown in Fig. 1 Fig. 2 and Fig. 3, including shank 1 and cutting portion 2.Cutting portion mainly includes main cutting edge 4, chisel edge 3, the and of front cutting edge 5
Chip pocket 6.
Main cutting edge 4 is mainly made up of rake face and rear knife face, and each point meets Logistic curves on main cutting edge
Equation y=1/ (1+2ex), using the outer rim blade tip line of two main cutting edges as x-axis, central axis is y-axis, the friendship of x-axis and y-axis
Point is origin.Blade type is S types, and the blade type can promote chip deformation, reduce the contact area of chip and machined surface, improve
Cutter chip breaking ability, ensure crudy.
Main cutting edge 4 includes rake face and rear knife face.Because the anterior angle of each point on main cutting edge 4, relief angle with cutter
The increase of heart distance and increase, set at the outer rim of main cutting edge 4 anterior angle as 15 °, relief angle is 8 ° at the outer rim of main cutting edge 4, the structure
The contact area of cutter and workpiece can be effectively reduced, reduces knife break frictional force, reduces the cutting force in drilling process, is reduced
Tool wear, improve cutter life.
The drift angle of cutting portion 2 is 135 °.The length of chisel edge 3 is 0.6mm.The structure can mitigate negative on unit cutting edge
Lotus, the rate of wear of nose angle is reduced, be advantageous to radiate, improve tool life, while the axle in drilling process can be reduced
To drag, drill bit intensity is improved.
The helical angle of front cutting edge 5 is 40 °, to increase chip pocket, facilitates chip smoothly to discharge.
Above-mentioned chip-breaking drill bit has S type blades, and during for drilling titanium alloy, chip breaking effect is good, and chip removal is smooth, effectively avoids
Chip twines knife, improves tool life and processing efficiency, ensures crudy.
Claims (5)
1. a kind of chip-breaking drill bit based on Logistic curves with S type blades, there is shank and cutting portion, it is characterized in that, cut
Cutting portion includes a chisel edge, two main cutting edges, two front cutting edges and chip pocket, and main cutting edge includes rake face and rear knife
Face, each point meets Logistic curvilinear equation y=1/ (1+2e on main cutting edgex), connected with the outer rim blade tip of two main cutting edges
Line is x-axis, and central axis is y-axis, and the intersection point of x-axis and y-axis is origin.
2. the chip-breaking drill bit based on Logistic curves with S type blades according to claim 1, it is characterized in that, it is described
Anterior angle and relief angle at main cutting edge outer rim are respectively 15 ° and 8 °.
3. the chip-breaking drill bit based on Logistic curves with S type blades according to claim 1, it is characterized in that, it is described
The drift angle of cutting portion is 135 °.
4. the chip-breaking drill bit based on Logistic curves with S type blades according to claim 1, it is characterized in that, it is described
Chisel edge length is 0.6mm.
5. the chip-breaking drill bit based on Logistic curves with S type blades according to claim 1, it is characterized in that, it is described
The helical angle of front cutting edge is 40 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610602257.3A CN106077767B (en) | 2016-07-28 | 2016-07-28 | There is the chip-breaking drill bit of S type blades based on Logistic curves |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610602257.3A CN106077767B (en) | 2016-07-28 | 2016-07-28 | There is the chip-breaking drill bit of S type blades based on Logistic curves |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106077767A CN106077767A (en) | 2016-11-09 |
| CN106077767B true CN106077767B (en) | 2018-03-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610602257.3A Active CN106077767B (en) | 2016-07-28 | 2016-07-28 | There is the chip-breaking drill bit of S type blades based on Logistic curves |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106984850A (en) * | 2017-06-08 | 2017-07-28 | 昆山伟吉电子有限公司 | A kind of groove knife for easily surrounding cutting |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB825308A (en) * | 1957-06-24 | 1959-12-16 | Cincinnati Milling Machine Co | A rotary drill |
| CN103128346A (en) * | 2013-03-19 | 2013-06-05 | 大连远东企业集团有限公司 | Twist drill with spiral cutting back tool |
| CN103764325A (en) * | 2011-09-06 | 2014-04-30 | Osg株式会社 | Drill |
| CN104400079A (en) * | 2014-11-27 | 2015-03-11 | 苏州阿诺精密切削技术股份有限公司 | Twist bit for carburizing steel |
| CN205129020U (en) * | 2015-11-02 | 2016-04-06 | 深圳市航天精密刀具有限公司 | A internal cooling carbide drill bit for BTA |
| CN205834314U (en) * | 2016-07-28 | 2016-12-28 | 山东大学 | There is the chip-breaking drill bit of S type blade based on Logistic curve |
-
2016
- 2016-07-28 CN CN201610602257.3A patent/CN106077767B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB825308A (en) * | 1957-06-24 | 1959-12-16 | Cincinnati Milling Machine Co | A rotary drill |
| CN103764325A (en) * | 2011-09-06 | 2014-04-30 | Osg株式会社 | Drill |
| CN103128346A (en) * | 2013-03-19 | 2013-06-05 | 大连远东企业集团有限公司 | Twist drill with spiral cutting back tool |
| CN104400079A (en) * | 2014-11-27 | 2015-03-11 | 苏州阿诺精密切削技术股份有限公司 | Twist bit for carburizing steel |
| CN205129020U (en) * | 2015-11-02 | 2016-04-06 | 深圳市航天精密刀具有限公司 | A internal cooling carbide drill bit for BTA |
| CN205834314U (en) * | 2016-07-28 | 2016-12-28 | 山东大学 | There is the chip-breaking drill bit of S type blade based on Logistic curve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106077767A (en) | 2016-11-09 |
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