CN101983812B - End mill with unequal helical angles - Google Patents
End mill with unequal helical angles Download PDFInfo
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- CN101983812B CN101983812B CN2010105658194A CN201010565819A CN101983812B CN 101983812 B CN101983812 B CN 101983812B CN 2010105658194 A CN2010105658194 A CN 2010105658194A CN 201010565819 A CN201010565819 A CN 201010565819A CN 101983812 B CN101983812 B CN 101983812B
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Abstract
The invention discloses an end mill with unequal helical angles, which comprises a cutting part and a handle part, wherein the whole cutting part is provided with a plurality of chip discharging grooves which helically extend from the bottom end to the handle part; the surface of each chip discharging groove facing the cutting rotation direction is a front cutting surface; each front cutting surface is crossed with the peripheral surface of the cutting part to form a peripheral blade; the helical angle of at least one peripheral blade is different from the helical angles of other peripheral blades; the surface connected with each peripheral blade in the peripheral surface of the cutting part is a back cutting surface positioned on a plane which is perpendicular to the rotary axis of the end mill; the outline of each chip discharging groove is formed by smoothly connecting a curve PM, a curve MN and a curve NQ; each chip discharging groove extends from a projection point P of each peripheral blade to a projection point M of each front cutting surface in the shape of a concave curve, extends from the point M to a point N in the shape of a concave curve, and extends from the point N in the shape of a convex curve and is crossed with the back cutting surface of each peripheral blade at a point Q; and the curve MN is tangential with the thick-core circle of the end mill at a point D. The end mill with unequal helical angles has the advantages of simple structure and strong vibration resistance and can improve the chip discharging property.
Description
Technical field
The present invention relates to the metal cutting manufacture field, relate in particular to a kind of not equal helix angle slotting cutter.
Background technology
Milling Process is a kind of discontinuous process; In milling process; Cutting movement between slotting cutter and the machined material makes it receive shock loading, causes the vibration of slotting cutter, when the vibration frequency of slotting cutter during near the intrinsic frequency of workpiece; Will cause resonance, thus the crudy of having a strong impact on and cutter life.For vibration, raising crudy and the cutter life that reduces or eliminate slotting cutter in the Milling Processes; At present the antivibration slotting cutter many improvement have been carried out; For example notification number is that the Chinese patent document of CN101530930 discloses a kind of not equal helix angle slotting cutter; This slotting cutter is formed with a plurality of peripheral edge that shape in the shape of a spiral reverses; The helical angle of each peripheral edge is different with the helical angle of other peripheral edge, thereby the milling time interval of peripheral edge on the slotting cutter direction of rotation is unequal, and the time interval of each peripheral edge incision workpiece is not waited yet; Angle between each peripheral edge and from the bottom peripheral edge inequality to effective length of cut of shank; Can prevent like this on the slotting cutter main body, to produce the periodic vibration identical, thereby avoid causing resonance, improve workpiece surface quality simultaneously and prevent excessive tool wear even tipping with the intrinsic frequency of workpiece.But in so not equal helix angle slotting cutter, slotting cutter rises to face in the past and is sag vertical curve and the thick circle of core is tangent; Linearly shape ground knife face extension behind slotting cutter from this position, point of contact then; Therefore, the bottom land chip space of its chip discharging grooves is less, is unfavorable for chip curling and discharge.The straight line portion of this chip discharging grooves and the groove bottom of back knife face be with oblique-angle intersection in addition, in the sword lobe narrowed width of the cutting edge of slotting cutter direction of rotation rear side, so the intensity of the cutting edge of slotting cutter and rigidity variation.
Summary of the invention
The technical problem that the present invention will solve is the deficiency that overcomes prior art, the not equal helix angle slotting cutter that provide that a kind of simple in structure, antivibration ability is strong, chip resistance and integral rigidity improves.
For solving the problems of the technologies described above, the present invention adopts following technical scheme:
A kind of not equal helix angle slotting cutter; Comprise cutting portion and shank; Said whole cutting portion is provided with a plurality of chip areas that extend to the shank spiral from the bottom, and each chip area is a rake face towards the face of cutting direction of rotation, and the outer peripheral face of said rake face and cutting portion intersects the formation peripheral edge; The helical angle of at least one peripheral edge is different from the helical angle of other peripheral edge; The face that joins with peripheral edge in the outer peripheral face of said cutting portion is the back knife face, and on the plane that is orthogonal to the slotting cutter rotation, the profile of said chip area is formed by connecting PM, MN and three sections line smoothings of NQ; The profile of said chip area is the subpoint M that the sag vertical curve shape extends to rake face from the subpoint P of peripheral edge; Be the sag vertical curve shape from said some M and extend to a N, be that the convex curve shape extends and intersect at a Q with the back knife face of peripheral edge from said some N again, the thick circle of core of said MN section and slotting cutter is tangential on a D.
Said PM, MN and three sections curves of NQ are circular curve, and the radius of said PM section is R1, and the radius of said MN section is R2, and the radius of said NQ section is R3.
The radii size relation of said PM, MN and three sections circular curves of NQ is R3＞R1＞R2, and the arc length magnitude relationship of said PM, MN and three sections circular curves of NQ is MN＞NQ＞PM.
On the plane that is orthogonal to the slotting cutter rotation, the slotting cutter rotation be projected as an O, the angle of line PO and line QO is φ, 45 °≤φ≤90 °.
Tangent line that said PM section circular curve is ordered in P and the angle of line PO are γ, 4 °≤γ≤12 °.
The angle of said line PO and line DO is θ, 15 °≤θ≤35 °.
Compared with prior art, the invention has the advantages that:
Not equal helix angle slotting cutter of the present invention; On the plane that is orthogonal to the slotting cutter rotation, the profile of chip area adopts three sections line smoothings with ad hoc structure to be formed by connecting, than the structure of existing chip area; The whole area of section of chip area among the present invention increases; The NQ section of chip area is the convex curve shape in above-mentioned cross section, can see off to the slotting cutter direction of rotation along the part of this cross section convex curve from the smear metal that rake face flows to the chip area, even therefore generate long or thicker smear metal; Also can discharge smoothly, make slotting cutter of the present invention be particularly suitable for the Milling Process of big cutting-in, roughing feed; Three of the chip area profile sections curves make under the situation of identical effective length of cut in above-mentioned cross section, and the intensity of peripheral edge and rigidity all are superior to traditional not equal helix angle slotting cutter, can improve the durability and the smear metal discharge property of slotting cutter.Not equal helix angle slotting cutter of the present invention has improved the bathtub construction and the peripheral edge structure of slotting cutter; The intensity and the chip resistance of cutter are better; Help improving the stock-removing efficiency and the durability of cutter, the vibration in the time of Milling Process being suppressed simultaneously, the surface quality of raising workpiece.
Description of drawings
Fig. 1 is a side-looking structural representation of the present invention;
Fig. 2 is the profile of A-A among Fig. 1;
Fig. 3 is the profile of B-B among Fig. 1;
Fig. 4 is the profile of C-C among Fig. 1.
Each label is represented among the figure:
1, cutting portion; 2, shank; 3, peripheral edge; 4, chip area; 11, back knife face; 12, the thick circle of core; 21, rake face.
The specific embodiment
Fig. 1 to Fig. 4 shows a kind of not equal helix angle slotting cutter embodiment of the present invention; This slotting cutter is processed cylindric by Hardmetal materials; The one of which end is for keeping columned shank 2; The other end is a cutting portion 1, and this shank 2 is used to connect machine tool chief axis, by machine tool chief axis drive slotting cutter along T to the rotary cutting work piece.Whole cutting portion 1 is provided with a plurality of chip areas 4 that extend to shank 2 spirals from the bottom, and the not equi-spaced apart arrangement of 4, four chip areas 4 of four chip areas is arranged in the present embodiment.Each chip area 4 is a rake face 21 towards the face of cutting direction of rotation; Rake face 21 intersects formation peripheral edge 3 with the outer peripheral face of cutting portion 1; The helical angle of at least one peripheral edge 3 is different from the helical angle of other peripheral edge 3; In the present embodiment, the helixangle 1 of a pair of chip area 4 is 38 °, and another helixangle 2 to chip area 4 is 41 °.The face that joins with peripheral edge 3 in the outer peripheral face of cutting portion 1 is back knife face 11; On the plane that is orthogonal to the slotting cutter rotation; The profile of chip area 4 is formed by connecting PM, MN and three sections line smoothings of NQ, and the profile of chip area 4 is the subpoint M that the sag vertical curve shape extends to rake face 21 from the subpoint P of peripheral edge 3, is the sag vertical curve shape from a M and extends to a N; Be that the convex curve shape extends and intersect at a Q from a N again with the back knife face 11 of peripheral edge 3; With afterwards knife face 11 linearities part is with oblique-angle intersection, the thick circle 12 of the core of MN section and slotting cutter is tangential on a D to this convex curve, than the structure of existing chip area 4 in the tangent line of a Q; Chip area 4 whole areas of section among the present invention increase; The NQ section of chip area 4 is the convex curve shape in above-mentioned cross section, can see off to the slotting cutter direction of rotation along the part of this cross section convex curve from the smear metal that rake face 21 flows to the chip area 4, even therefore generate long or thicker smear metal; Also can discharge smoothly, make slotting cutter of the present invention be particularly suitable for the Milling Process of big cutting-in, roughing feed; The contour curve of chip area 4 in above-mentioned cross section makes under the situation of identical effective length of cut, and the intensity of peripheral edge 3 and rigidity all are superior to traditional not equal helix angle slotting cutter, can improve the durability and the smear metal discharge property of slotting cutter.
In the present embodiment, PM, MN and three sections curves of NQ are circular curve, and the radius of PM section is R1; The radius of MN section is R2, and the radius of NQ section is R3, and the radii size relation of PM, MN and three sections circular curves of NQ is R3＞R1＞R2; The arc length magnitude relationship of PM, MN and three sections circular curves of NQ is MN＞NQ＞PM, on the plane that is orthogonal to the slotting cutter rotation, the slotting cutter rotation be projected as an O; The angle of line PO and line QO is φ; 45 °≤φ≤90 °, in the present embodiment, φ=60 °; Tangent line that PM section circular curve is ordered in P and the angle of line PO are γ, 4 °≤γ≤12 °, and in the present embodiment, γ=8 °; The angle of line PO and line DO is θ, 15 °≤θ≤35 °, and in the present embodiment, θ=25 °; Not equal helix angle slotting cutter of the present invention has improved the bathtub construction of slotting cutter, and the intensity and the chip resistance of cutter are better, helps improving the stock-removing efficiency and the durability of cutter, the vibration in the time of suppressing Milling Process simultaneously, the surface quality of raising workpiece.
The present invention can also be applied to ball end mill, radius end mill etc. except the right angle slotting cutter that can be applied to present embodiment.
Above-mentioned is preferred embodiment of the present invention, is not the present invention is done any pro forma restriction.Though the present invention discloses as above with preferred embodiment, yet be not in order to limit the present invention.Any those of ordinary skill in the art, under the situation that does not break away from technical scheme scope of the present invention, all the technology contents of above-mentioned announcement capable of using is made many possible changes and modification to technical scheme of the present invention, or is revised as the equivalent embodiment of equivalent variations.Therefore, every content that does not break away from technical scheme of the present invention, all should drop in the scope of technical scheme protection of the present invention any simple modification, equivalent variations and modification that above embodiment did according to technical spirit of the present invention.
Claims (6)
1. equal helix angle slotting cutter not; Comprise cutting portion (1) and shank (2); Said whole cutting portion (1) is provided with a plurality of chip areas (4) that extend to shank (2) spiral from the bottom; Each chip area (4) is rake face (21) towards the face of cutting direction of rotation; Said rake face (21) intersects formation peripheral edge (3) with the outer peripheral face of cutting portion (1), and the helical angle of at least one peripheral edge (3) is different from the helical angle of other peripheral edge (3), and the face that joins with peripheral edge (3) in the outer peripheral face of said cutting portion (1) is back knife face (11); It is characterized in that: on the plane that is orthogonal to the slotting cutter rotation; The profile of said chip area (4) is formed by connecting PM, MN and three sections line smoothings of NQ, and the profile of said chip area (4) is the subpoint M that the sag vertical curve shape extends to rake face (21) from the subpoint P of peripheral edge (3), is the sag vertical curve shape from said some M and extends to a N; Be that the convex curve shape extends and intersect at a Q with the back knife face (11) of peripheral edge (3) from said some N again, the thick circle of core (12) of said MN section and slotting cutter is tangential on a D.
2. not equal helix angle slotting cutter according to claim 1 is characterized in that: said PM, MN and three sections curves of NQ are circular curve, and the radius of said PM section is R1, and the radius of said MN section is R2, and the radius of said NQ section is R3.
3. not equal helix angle slotting cutter according to claim 2; It is characterized in that: the radii size relation of said PM, MN and three sections circular curves of NQ is R3＞R1＞R2, and the arc length magnitude relationship of said PM, MN and three sections circular curves of NQ is MN＞NQ＞PM.
4. according to claim 2 or 3 described not equal helix angle slotting cutters, it is characterized in that: on the plane that is orthogonal to the slotting cutter rotation, the slotting cutter rotation be projected as an O, the angle of line PO and line QO is φ, 45 °≤φ≤90 °.
5. not equal helix angle slotting cutter according to claim 4 is characterized in that: tangent line that said PM section circular curve is ordered in P and the angle of line PO are γ, 4 °≤γ≤12 °.
6. not equal helix angle slotting cutter according to claim 5 is characterized in that: the angle of said line PO and line DO is θ, 15 °≤θ≤35 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105658194A CN101983812B (en) | 2010-11-30 | 2010-11-30 | End mill with unequal helical angles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105658194A CN101983812B (en) | 2010-11-30 | 2010-11-30 | End mill with unequal helical angles |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101983812A CN101983812A (en) | 2011-03-09 |
| CN101983812B true CN101983812B (en) | 2012-04-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010105658194A Active CN101983812B (en) | 2010-11-30 | 2010-11-30 | End mill with unequal helical angles |
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| CN (1) | CN101983812B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103600116A (en) * | 2013-11-26 | 2014-02-26 | 常熟量具刃具厂 | Spiral cut milling cutter with convex shoulder |
| CN104400096B (en) * | 2014-08-07 | 2017-12-22 | 上海精韧激光科技有限公司 | Milling cutter |
| DE112016003924B4 (en) * | 2015-08-28 | 2021-09-16 | Kyocera Corporation | End mills and method of making a machined product |
| CN106424881B (en) * | 2016-10-21 | 2018-06-22 | 株洲钻石切削刀具股份有限公司 | milling cutter |
| CN107186259A (en) * | 2017-05-19 | 2017-09-22 | 海安国洋机械科技有限公司 | A kind of slotting cutter |
| CN107350531B (en) * | 2017-06-30 | 2019-06-25 | 株洲钻石切削刀具股份有限公司 | A kind of step cutter |
| US10486246B2 (en) * | 2018-02-26 | 2019-11-26 | Iscar, Ltd. | End mill having a peripheral cutting edge with a variable angle configuration |
| CN112719385B (en) * | 2020-12-25 | 2022-06-14 | 株洲钻石切削刀具股份有限公司 | Milling cutter |
| CN116984668B (en) * | 2023-09-13 | 2024-03-08 | 哈尔滨理工大学 | Coupling bionic end mill |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1475322A (en) * | 2002-03-25 | 2004-02-18 | �����ɷ� | Radial end milling cutter with reinforced radial edge capable of preventing scrap and breaking |
| CN201231337Y (en) * | 2008-07-09 | 2009-05-06 | 厦门金鹭特种合金有限公司 | Butt mill of gradual core-diameter with large arc groove |
| CN101530930A (en) * | 2008-03-13 | 2009-09-16 | 三菱综合材料株式会社 | End mill |
| CN201519794U (en) * | 2009-09-29 | 2010-07-07 | 龙岩市华锐硬质合金工具有限公司 | Round-nose vertical milling cutter |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006015417A (en) * | 2004-06-30 | 2006-01-19 | Mitsubishi Materials Kobe Tools Corp | End mill |
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- 2010-11-30 CN CN2010105658194A patent/CN101983812B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1475322A (en) * | 2002-03-25 | 2004-02-18 | �����ɷ� | Radial end milling cutter with reinforced radial edge capable of preventing scrap and breaking |
| CN101530930A (en) * | 2008-03-13 | 2009-09-16 | 三菱综合材料株式会社 | End mill |
| CN201231337Y (en) * | 2008-07-09 | 2009-05-06 | 厦门金鹭特种合金有限公司 | Butt mill of gradual core-diameter with large arc groove |
| CN201519794U (en) * | 2009-09-29 | 2010-07-07 | 龙岩市华锐硬质合金工具有限公司 | Round-nose vertical milling cutter |
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| CN101983812A (en) | 2011-03-09 |
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