CN115464194B - Asymmetric vibration-damping conical ball-end milling cutter for milling titanium alloy blades - Google Patents
Asymmetric vibration-damping conical ball-end milling cutter for milling titanium alloy blades Download PDFInfo
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- CN115464194B CN115464194B CN202211010843.0A CN202211010843A CN115464194B CN 115464194 B CN115464194 B CN 115464194B CN 202211010843 A CN202211010843 A CN 202211010843A CN 115464194 B CN115464194 B CN 115464194B
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- titanium alloy
- main cutting
- milling cutter
- asymmetric vibration
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- 238000003801 milling Methods 0.000 title claims abstract description 67
- 229910001069 Ti alloy Inorganic materials 0.000 title claims abstract description 41
- 238000013016 damping Methods 0.000 title claims abstract description 16
- 238000001816 cooling Methods 0.000 claims abstract description 29
- 230000002093 peripheral effect Effects 0.000 claims abstract 2
- 239000000463 material Substances 0.000 claims description 4
- 238000002161 passivation Methods 0.000 claims 1
- 239000002826 coolant Substances 0.000 abstract 1
- 239000000110 cooling liquid Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000011825 aerospace material Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 150000001844 chromium Chemical class 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C5/00—Milling-cutters
- B23C5/02—Milling-cutters characterised by the shape of the cutter
- B23C5/10—Shank-type cutters, i.e. with an integral shaft
- B23C5/1009—Ball nose end mills
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C5/00—Milling-cutters
- B23C5/28—Features relating to lubricating or cooling
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Milling Processes (AREA)
Abstract
一种钛合金叶片铣削用不对称减振锥形球头铣刀，涉及铣刀领域。该钛合金叶片铣削用不对称减振锥形球头铣刀包括依次设置的刀柄部分、螺旋切削部分和球头切削部分及内冷部分，球头切削部分包含至少一对沿周向间隔不对称布置的主切削刃，主切削刃的两侧分别设有排屑槽和刀尖间隙，主切削刃朝向刀尖间隙的一侧具有第一后刀面；螺旋切削部分包含与排屑槽一一对应连通的螺旋槽及与第一后刀面一一对应连接的周刃第一后刀面；内冷部分包括与主切削刃一一对应的内冷孔，内冷孔的一端贯穿刀柄部分端面，另一端贯穿螺旋槽及其对应的排屑槽。钛合金叶片铣削用不对称减振锥形球头铣刀减小了振动，并能够使冷却液高效的进入切削区域来降低切削区域的温度。
An asymmetric vibration-damping conical ball-end milling cutter for milling titanium alloy blades relates to the field of milling cutters. The asymmetric vibration-damping conical ball-end milling cutter for milling titanium alloy blades comprises a shank portion, a spiral cutting portion, a ball-end cutting portion and an internal cooling portion which are arranged in sequence. The ball-end cutting portion comprises at least one pair of main cutting edges which are arranged asymmetrically along the circumferential direction, and both sides of the main cutting edges are provided with a chip groove and a tool tip gap respectively, and the main cutting edge has a first flank face on the side facing the tool tip gap; the spiral cutting portion comprises a spiral groove which is connected to the chip groove in a one-to-one correspondence and a first flank face of a peripheral blade which is connected to the first flank face in a one-to-one correspondence; the internal cooling portion comprises an internal cooling hole which is in a one-to-one correspondence with the main cutting edge, and one end of the internal cooling hole passes through the end face of the shank portion, and the other end passes through the spiral groove and its corresponding chip groove. The asymmetric vibration-damping conical ball-end milling cutter for milling titanium alloy blades reduces vibration and enables the coolant to efficiently enter the cutting area to reduce the temperature of the cutting area.
Description
Technical Field
The application relates to the field of milling cutters, in particular to an asymmetric vibration reduction conical ball end milling cutter for milling titanium alloy blades.
Background
Titanium alloy is used as an ideal aerospace material and is widely applied to the field of blades of aeroengines. Titanium alloys have excellent material properties with the attendant processing problems. The specific strength of the titanium alloy is highest in the metal materials of modern engineering structures, is suitable for manufacturing parts of aircrafts, can improve the flying performance of aircrafts, has the advantages of good heat resistance and high thermal strength, the working temperature can reach 500 ℃, the strength of the titanium alloy is 10 times higher than that of the aluminum alloy at the temperature of 300-500 ℃, the corrosion resistance of the titanium alloy is good, but the corrosion resistance of the titanium to the medium with reduced oxygen and chromium salt is poor; titanium alloys tend to undergo elastic deformation due to their low elastic modulus. The slender rod and the thin-walled part are not easy to manufacture.
The titanium alloy has the characteristics of small elastic modulus, low heat conductivity coefficient, low deformation coefficient and the like, so that the abrasion is serious in the cutter processing process, and the surface quality of a processed workpiece is poor. In the processing process of the aero-engine blade, the processing efficiency of the titanium alloy processing cutter is low, the consumption is large, a large amount of the cutter needs to be reserved for standby, the cost is high, and the processing requirement cannot be met.
Disclosure of Invention
The application aims to provide an asymmetric vibration reduction conical ball end mill for milling a titanium alloy blade, which reduces vibration and the possibility of breakage and tipping of a cutting edge, and enables cooling liquid to efficiently enter a cutting area to reduce the temperature of the cutting area.
Embodiments of the present application are implemented as follows:
The application provides an asymmetric vibration reduction conical ball end milling cutter for milling titanium alloy blades, which comprises a cutter handle part, a spiral cutting part, a ball end cutting part and an internal cooling part, wherein the spiral cutting part is arranged at the end part of the cutter handle part; the spiral cutting part comprises spiral grooves communicated with the chip grooves in a one-to-one correspondence manner and Zhou Rendi a flank connected with the first flank in a one-to-one correspondence manner; the inner cooling part comprises inner cooling holes corresponding to the main cutting edges one by one, one end of each inner cooling hole penetrates through the end face of the cutter handle part, and the other end of each inner cooling hole penetrates through the spiral groove and the corresponding chip removal groove.
In some alternative embodiments, the rake angle of the flute side of each pair of main cutting edges is 8-15 ° and 0-5 °, respectively.
In some alternative embodiments, the relief angle of the first relief surface side of each pair of main cutting edges is 6-10 ° and 10-15 °, respectively.
In some alternative embodiments, the passivating corner radius of the main cutting edge is 0.02-0.05mm.
In some alternative embodiments, the internal cooling hole is tangential to the axis of the shank portion at the end of the helical cutting portion at an angle of 10-15 °.
In some alternative embodiments, the helical cutting portion is conical and has a cone angle of 2-4 °.
In some alternative embodiments, the spacing angle between each pair of main cutting edges is 173-178 °.
The beneficial effects of the application are as follows: the application provides an asymmetric vibration reduction conical ball end milling cutter for milling titanium alloy blades, which comprises a cutter handle part, a spiral cutting part, a ball end cutting part and an internal cooling part, wherein the spiral cutting part is arranged at the end part of the cutter handle part; the spiral cutting part comprises spiral grooves communicated with the chip grooves in a one-to-one correspondence manner and Zhou Rendi a flank connected with the first flank in a one-to-one correspondence manner; the inner cooling part comprises inner cooling holes corresponding to the main cutting edges one by one, one end of each inner cooling hole penetrates through the end face of the cutter handle part, and the other end of each inner cooling hole penetrates through the spiral groove and the corresponding chip removal groove. The asymmetric vibration reduction conical ball-end milling cutter for milling the titanium alloy blade breaks through the vibration frequency of the conventional symmetrical cutting edge design, so that vibration is reduced, the possibility of breakage and tipping of the cutting edge is reduced, cooling liquid efficiently enters a cutting area to reduce the temperature of the cutting area while ensuring the rigidity of the milling cutter through an inner cooling hole, and the effects of prolonging the service life of the cutter and improving the surface precision are achieved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural view of a first view angle of an asymmetric vibration reduction conical ball end mill for milling a titanium alloy blade according to an embodiment of the present application;
fig. 2 is a schematic structural view of a second view angle of an asymmetric vibration reduction conical ball end mill for milling a titanium alloy blade according to an embodiment of the present application;
Fig. 3 is a schematic structural view of a third view angle of an asymmetric vibration reduction conical ball end mill for milling a titanium alloy blade according to an embodiment of the present application;
Fig. 4 is a schematic structural view of a rake angle and a relief angle of a cross section of one main cutting edge of an asymmetric vibration reduction conical ball end mill for milling a titanium alloy blade according to an embodiment of the present application;
Fig. 5 is a schematic structural view of a rake angle and a relief angle of a cross section of another main cutting edge of an asymmetric vibration reduction conical ball end mill for milling a titanium alloy blade according to an embodiment of the present application;
FIG. 6 is a schematic structural view of an included angle between an end tangent line of an internal cooling hole of an asymmetric vibration reduction conical ball end mill for milling a titanium alloy blade and an axis of a shank portion at a spiral cutting portion;
fig. 7 is an equation schematic diagram of the outline of the main cutting edge of the asymmetric vibration reduction conical ball end mill for milling a titanium alloy blade according to the embodiment of the application.
In the figure: 100. a shank portion; 110. a helical cutting portion; 111. a spiral groove; 112. zhou Rendi a rear cutter face; 120. a ball head cutting portion; 121. a main cutting edge; 122. a chip removal groove; 123. a knife tip gap; 124. a first relief surface; 130. and an inner cooling hole.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments of the present application. The components of the embodiments of the present application generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the application, as presented in the figures, is not intended to limit the scope of the application, as claimed, but is merely representative of selected embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the present application, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or those that are conventionally put in use of the product of the application, are merely for convenience of describing the present application and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific direction, be configured and operated in a specific direction, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal," "vertical," "overhang," and the like do not denote a requirement that the component be absolutely horizontal or overhang, but rather may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present application, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art.
In the present application, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
The features and properties of the asymmetric vibration-damping tapered ball nose milling cutter for milling titanium alloy blades of the present application are described in further detail below with reference to the examples.
As shown in fig. 1, 2, 3,4, 5 and 6, an asymmetric vibration damping conical ball end mill for milling a titanium alloy blade is provided in an embodiment of the present application, and includes a shank portion 100, a spiral cutting portion 110 and a ball end cutting portion 120 which are sequentially connected, wherein the ball end diameter of the ball end cutting portion 120 is 2.003mm, the ball end cutting portion 120 includes a pair of main cutting edges 121 which are asymmetrically arranged along a circumferential direction, a spacing angle between the two main cutting edges 121 along the circumferential direction is 174 °, chip removal grooves 122 and tip gaps 123 are respectively provided on both sides of the main cutting edges 121, and a first relief surface 124 is provided on one side of the main cutting edge 121 facing the tip gaps 123; the two main cutting edges 121 in each pair of main cutting edges 121 are a main cutting edge a and a main cutting edge b, and the rake angles α on the chip groove 122 side of the main cutting edge a and the main cutting edge b are 10 ° and 3 °, respectively, and the relief angles β on the first relief surface 124 side of the main cutting edge a and the main cutting edge b are 8 ° and 12 °, respectively. The length of the main cutting edge 121 is 1.1mm and the passivating corner radius of the main cutting edge 121 is in the range of 0.02-0.05 mm. The spiral cutting part is conical with a cone angle of 3 degrees, and the spiral cutting part 110 comprises spiral grooves 111 in one-to-one correspondence with the chip grooves 122 and Zhou Rendi one flank 112 in one-to-one correspondence with the first flank 124; the asymmetric vibration reduction conical ball end mill for milling the titanium alloy blade further comprises an inner cooling part, wherein the inner cooling part comprises two inner cooling holes 130 which are in one-to-one correspondence with the main cutting edges 121, one end of each inner Leng Kong penetrates through the end face of the shank part 100, which is far away from the spiral cutting part 110, and the other end penetrates through the connection part of the spiral groove 111 and the corresponding chip groove 122; the tangent to the inner Leng Kong at the end of the helical cutting portion 110 is at an angle of 15 ° to the axis of the shank portion 100.
The asymmetric vibration reduction conical ball end mill for milling the titanium alloy blade provided by the embodiment of the application can break the vibration frequency of the conventional symmetric main cutting edge 121 design by adopting the asymmetric main cutting edge 121 design, thereby achieving the purpose of reducing vibration and reducing the possibility of breakage and tipping of the main cutting edge 121. By using rake angles of 8-15 ° and 0-5 ° on one side of the chip groove 122 of each pair of main cutting edges 121, and using relief angles of 6-10 ° and 10-15 ° on the first relief surface 124 of each pair of main cutting edges 121, respectively, it is possible to increase the contact area of the tool with the chip while reducing the cutting force, so that the temperature of the cutting area of the tool is reduced, wherein the center of mass of the tool can be corrected by separately designing the rake angles and relief angles of the two main cutting edges 121 so as to be at the center of rotation, considering that the center of mass of the main cutting edge 121 of the tool deviates from the axis of rotation of the tool when the main cutting edge 121 of the tool is asymmetrical;
By arranging the inner cooling holes 130 with two ends penetrating through the shank 100, the spiral groove 111 and the corresponding junk slots 122, the high-pressure cooling liquid sprayed out of the inner cooling holes 130 can directly reach the cutting area of the cutter, so that the cutting temperature of the cutter is effectively reduced, and the abrasion process of the cutter is slowed down. The included angle between the tangent line of the tail end of the spiral cutting part 110 of the inner Leng Kong and the axis of the knife handle part 100 is 15 degrees, so that the cooling liquid in the inner cooling hole 130 can be ensured to cool the cutting area, and the deviation and adverse effect on the mass center of the knife are avoided.
The dynamic balance principle of the asymmetric vibration reduction conical ball end mill for milling the titanium alloy blade provided by the embodiment of the application is as follows:
A rectangular coordinate system is established such that the Z axis of the coordinate system coincides with the central axis of the asymmetric vibration-damping tapered ball end mill for milling a titanium alloy blade, and as shown in fig. 7, equations of the inner and outer contours of the main cutting edge 121 in the coordinate system are f 1 (x) and f 2 (x), respectively.
According to the equation that the length H of the main cutting edge 121 of the milling cutter, the total length 1, the helix angle beta, the material density rho of the asymmetric vibration reduction conical ball end milling cutter for milling titanium alloy blades, the external circle radius R of the spiral cutting part 110 of the milling cutter and the tooth clearance difference angle theta are brought into the internal and external contours of the main cutting edge 121, the external contour f 1 (x) is determined according to the angle of the front cutting surface of the main cutting edge 121, the unbalance U of the milling cutter of the standard milling cutter is substituted into the following equation to calculate the relation between the centroid coordinate (x 1,y1) and the radial cross-section area S of the main cutting edge 121:
the radial cross-sectional area S of the main cutting edge 121 and centroid coordinates (x 1,y1) are calculated as follows:
s＝∫(f2(x)-f1(x))dx
According to the calculation flow of the rake angle and relief angle parameters of the main cutting edge a and the main cutting edge b: the first step is to take the average unbalance U of a plurality of standard milling cutters (3-5 standard milling cutters) detected by a dynamic balance measuring instrument as a standard. And secondly, selecting a tooth pitch difference angle theta and the designed length H of the main cutting edge 121 within an optimal range, wherein the total length 1 of the milling cutter, the helix angle beta, the material density rho and the outer circle radius R of the spiral cutting part 110 of the milling cutter are all selected, and the outer side contour f 1 (x) of the main cutting edge 121 is determined according to the outer side angle of the main cutting edge 121. And thirdly, reversely solving the inner side profile f 2 (x) of the main cutting edge 121 by the formula. Fourth, the inside contour f 2 (x) of the main cutting edge 121 is differentiated to determine the inside angle of the main cutting edge 121.
The embodiments described above are some, but not all embodiments of the application. The detailed description of the embodiments of the application is not intended to limit the scope of the application, as claimed, but is merely representative of selected embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
Claims (7)
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211010843.0A CN115464194B (en) | 2022-08-23 | 2022-08-23 | Asymmetric vibration-damping conical ball-end milling cutter for milling titanium alloy blades |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211010843.0A CN115464194B (en) | 2022-08-23 | 2022-08-23 | Asymmetric vibration-damping conical ball-end milling cutter for milling titanium alloy blades |
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| CN115464194B true CN115464194B (en) | 2024-11-12 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203725860U (en) * | 2014-01-06 | 2014-07-23 | 厦门金鹭特种合金有限公司 | High-efficiency inner-cooling end milling cutter for processing titanium alloy slot/cavity |
| CN212665005U (en) * | 2020-07-21 | 2021-03-09 | 上海冠钻精密工具有限公司 | Ball end milling cutter |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CA2246152A1 (en) * | 1997-08-27 | 1999-02-27 | Anthony A. Renshaw | Method and apparatus for improving spinning disk behavior using speed dependent clamping |
| CN101003098A (en) * | 2007-01-23 | 2007-07-25 | 北京科技大学 | Involute gear hob of asymmetric tooth profile with equal modulus |
| CN101318233A (en) * | 2008-07-16 | 2008-12-10 | 田栽亮 | Taper degree mounting type off-centering machine cutting ferrule material drill |
| CN101334656B (en) * | 2008-07-25 | 2010-08-04 | 华中科技大学 | A CNC machine tool processing performance monitoring system |
| CN101695773A (en) * | 2009-10-27 | 2010-04-21 | 南京工业大学 | An Indexable Forming Double Cutter Gear Milling Cutter |
| DE102019005692A1 (en) * | 2019-08-14 | 2021-02-18 | Technische Universität Dortmund | Cutting edge preparation |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203725860U (en) * | 2014-01-06 | 2014-07-23 | 厦门金鹭特种合金有限公司 | High-efficiency inner-cooling end milling cutter for processing titanium alloy slot/cavity |
| CN212665005U (en) * | 2020-07-21 | 2021-03-09 | 上海冠钻精密工具有限公司 | Ball end milling cutter |
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