CN103071840A - Pineapple end mill for carbon fiber reinforced composite - Google Patents

Pineapple end mill for carbon fiber reinforced composite Download PDF

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Publication number
CN103071840A
CN103071840A CN2013100378788A CN201310037878A CN103071840A CN 103071840 A CN103071840 A CN 103071840A CN 2013100378788 A CN2013100378788 A CN 2013100378788A CN 201310037878 A CN201310037878 A CN 201310037878A CN 103071840 A CN103071840 A CN 103071840A
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China
Prior art keywords
cutter
mill
teeth
reinforced composite
pineapple
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Pending
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CN2013100378788A
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Chinese (zh)
Inventor
于广滨
戴冰
孙永国
赵磊
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Harbin University of Science and Technology
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Harbin University of Science and Technology
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Priority to CN2013100378788A priority Critical patent/CN103071840A/en
Publication of CN103071840A publication Critical patent/CN103071840A/en
Pending legal-status Critical Current

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Abstract

The invention relates to a pineapple end mill for a carbon fiber reinforced composite. In general, when milling is conducted on a composite plate and a laminated plate, defects of layering, separation, burning and the like are generated easily, and particularly the layering and separation have the greatest influence on the processing quality. The pineapple end mill for the carbon fiber reinforced composite comprises a mill shank (1), wherein the mill shank (1) is connected with a mill neck (2) made of an alloy material; the mill neck is provided with a dextrorotatory mill tooth belt (3) and dextrorotatory mill teeth (4); levorotatory teeth (5) and levorotatory tooth sockets are arranged on and formed in the dextrorotatory mill tooth belt; and nano composite coatings are arranged on the dextrorotatory mill teeth and the levorotatory teeth. The pineapple end mill can be widely applied to aerospace, competitive automobile housing manufacturing, mold platemaking, advertisement decoration, precise electronic part processing, and the like.

Description

The pineapple slotting cutter that is used for carbon fibre reinforced composite
Technical field:
The invention provides a kind of slotting cutter of the carbon fibre reinforced composite for the sports of space flight and automobile, circuit board.
Background technology:
Carbon fibre reinforced composite has the advantages such as specific strength is high, specific modulus is high, vibration damping is good, is widely applied at aerospace field, and is also increasing in the application of the industries such as automobile sports, sports apparatus.The opportunity of combat of being on active service after the eighties in 20th century all adopts carbon fibre reinforced composite in a large number, and the consumption of composite has become one of important indicator of weighing aeroplane performance.For example, the composite consumption of France's fitful wind opportunity of combat accounts for 40%, and Sweden's JAS39 opportunity of combat accounts for 30%, and Europe " typhoon " opportunity of combat is greater than 40%, the trump card weapon B-2 strategic bomber of the U.S. accounts for 50%, and up-to-date F-22 " bird of prey " the fighter plane composite consumption of USAF has reached 35%.1984, toray company successfully developed the carbon fiber T800H of high strength, large elongation, 1986, researches and develops again successful T1000.Subsequently, Japanese eastern nation, mitsubishi rayon and U.S. Hexcel company develop similar high-performance carbon fibre in succession, provide advanced composite material (ACM) for making large aircraft.From then on, the consumption straight line of carbon fibre reinforced composite on large aircraft rises.
Along with the expansion of composite application, the high accuracy, the highly-efficient processing problem that solve composite are also day by day urgent.Generally speaking, on this type of composite board, laminated plate, during Milling Process, easily produce the defectives such as layering, splitting, burn, wherein especially with layering, splitting crudy is had the greatest impact.It is introduced, in the manufacturing of AV-8B aircraft, because layering, the part disqualification rate that splitting causes that processing causes account for more than 60% of full machine CFRP part disqualification rate.
The main cause that layering, splitting phenomenon occur is: (1) composite plate is formed by the carbon fiber layer laying, uses between layers resin-bonded.Because it is a kind of anisotropic material that carbon fiber strengthens compound, its mechanical performance is different at different directions, material is higher along fiber laying direction intensity, intensity perpendicular to fiber laying direction then depends on resin-bonded intensity, generally speaking, interfacial bonding strength only is 2.2% of machine direction intensity.(2) add man-hour, existence is perpendicular to the axial force F z of fiber laying direction, thereby in laminated plate, produce direct stress, the direct stress that produces when cutting force surpasses resin-bonded intensity, the phenomenons such as resin fracture, fibrage layering or splitting then can appear, axial force is larger, and layering, splitting phenomenon are more serious.
Summary of the invention:
The invention provides a kind of cutter that carries out Milling Process at the carbon fibre composite laminated plate, to overcome the problem of existing resin fracture, fibrage layering or splitting.
The object of the present invention is achieved like this:
The pineapple slotting cutter that is used for carbon fibre reinforced composite, its composition comprises: the pineapple slotting cutter that is used for carbon fibre reinforced composite, its composition comprises: handle of a knife, described handle of a knife connects the cutter neck of alloy material, described cutter neck has dextrorotation cutter tooth band and dextrorotation cutter tooth, have left-hand teeth and left-handed teeth groove on the described dextrorotation cutter tooth band, have nano-composite plate on described dextrorotation cutter tooth and the described left-hand teeth.
Described pineapple slotting cutter for carbon fibre reinforced composite, the described right-hand teeth number of teeth are 2-8,30 °-60 ° of helical angles.
Described pineapple slotting cutter for carbon fibre reinforced composite, described cutter footpath 0.80mm to 3.175mm, 3.175mm described cutter neck in handle footpath adopts hard alloy bar and tungsten steel bar, and described dextrorotation cutter tooth and described left-hand teeth use ultrafine crystal grain hard alloy material.
Described pineapple slotting cutter for carbon fibre reinforced composite, 40 °-45 ° of described helical angles, the variation of the helical angle of single cutter is no more than 5 °.
Beneficial effect:
Carbon fibre reinforced composite often will be connected with other structures in application process, and connection is the weak link of composite structure.According to statistics, 60% ~ 80% destruction all occurs in connecting portion in the aerospace flight vehicle.The mechanical connection that the most often adopts in the connection need to carry out first the processing at mechanical connection position.For example, a Boeing-747 aircraft has more than 300 ten thousand connecting holes, and the U.S.'s every slave wing of state-of-the-art F-22 fighter plane wants 14000 smart holes to need milling.Composite is typical difficult-to-machine material, and its processing technology is complicated, and is higher to the requirement of cutter and technological parameter.Therefore, the composite drill process has become one of critical process of composite application.The present invention has effectively solved the splitting lamination problem in the processing of smart hole.
Carbon fibre reinforced composite is two-phase or the heterogeneous structure that is mixed by the soft and tough matrix material of matter and intensity is high, hardness is large carbon fibre reinforcement, its mechanical property is anisotropy, interlaminar strength is low, easily produces the defectives such as layering, splitting during cutting under the effect of cutting force.
It is large owing to material hardness during existing carbon fibre reinforced composite drilling is processed, its hardness HRC value can reach 53 ~ 65, the hardness that is equivalent to general high-speed steel, thereby during milling the cutting edge wearing and tearing very fast, because interlaminar strength is intensity according to bonding numerical value produces, interlaminar strength is low, in process, easily produce the defectives such as layering; And composite belongs to anisotropic material, stress is concentrated when larger, very easily causes the defectives such as burr, splitting, and the present invention adopts specific cutting angle, helical angle, the quantity that increases left revolving blade can effectively be offset the axial cutting force that produces when cutting, and reduces as far as possible burr and lamination.Layering is the major defect in the carbon fibre composite processing.The size of lamination defect can represent with the layering factor (Fd).The layering factor can be shown with following formula table: Fd=Dmax/D, and wherein, Dmax represents the diameter of maximum damage field, D represents the actual diameter in hole, as shown in Figure 2.Exist linearity or piecewise linear relationship between layering factor Fd and average axial force F z: average axial force F z is larger, and Fd is larger for the layering factor, and layering is more serious.The present invention has effectively overcome separation resistance by the design of specific helical angle, obtains accurately pass.
The present invention adopts more left-hand teeth, and material is pressed down, and the frock rigidity is provided, and obtains better surface quality.The special parameter of this product, be specifically designed to the composites such as processing carbon fiber, glass fibre, cellular material, MMC Metal Substrate, 0 degree cutting edge inclination slotting cutter: be applicable to the large absolutely various composites (comprising plastic base composite material, metal-base composites and ceramic matric composite) what are used; The positive above cutting edge inclination slotting cutter of degree more than 3: in the process material is pressed down, thereby obtain best upper surface surface quality; The above cutting edge inclination slotting cutter of negative 3 degree: will push away on the material in the process, thereby obtain best upper surface surface quality.
Cutter neck of the present invention adopts hard alloy bar and tungsten steel bar, has high rigidity, high-wearing feature, high strength, counter-bending, anti-losing, it is preferential that cutter life is grown, cutter tooth uses ultrafine crystal grain hard alloy material, has good milling performance, guarantees the efficient work rate; Enough bending strengths and wearability are arranged; Groove milling, hole and edges of boards, surface cleaning, neat, without burr.This method can be widely used in Aero-Space, the processing such as the manufacturing of sports automobile case, mould plate-making, ad decoration, precise electronic part.
Description of drawings:
Accompanying drawing 1 is structural representation of the present invention.
Accompanying drawing 2 is stress distribution schematic diagrames of separation resistance.
Embodiment 1:
A kind of pineapple slotting cutter for carbon fibre reinforced composite, its composition comprises: handle of a knife 1, described handle of a knife connects the cutter neck 2 of alloy material, described cutter neck has dextrorotation cutter tooth band 3 and dextrorotation cutter tooth 4, have left-hand teeth 5 and left-handed teeth groove on the described dextrorotation cutter tooth band, have nano-composite plate on described dextrorotation cutter tooth and the described left-hand teeth.
Embodiment 2:
Embodiment 1 described pineapple slotting cutter for carbon fibre reinforced composite, the described right-hand teeth number of teeth are 2-8,30 °-60 ° of helical angles.The profile of tooth of the routine of helical edges slotting cutter has two kinds of straight shape and spiralitys. because the helical edges slotting cutter has cutting brisk with respect to straight cutlery, steadily, the advantages such as efficient height and the scope of application are wide, therefore in Milling Process, be widely applied. according to the different requirements of process equipment and processing object, the helical edges slotting cutter has left sword, right sword and left-hand screw, 4 kinds of various combinations that divide of right-hand screw, the trend that the axial cutting resistance handlebar slotting cutter of its left sword left-hand screw and right sword right-hand screw work in-process is extracted from cutter holder, need to adopt turnbuckle to overcome axial cutting resistance. and the axial cutting resistance of left sword right-hand screw and right sword left-hand screw just presses to chuck side to slotting cutter, therefore adopt taper shank to add tang more, to adapt to high-power cutting. because right sword right-hand screw slotting cutter can allow smear metal discharge to shank along chip area, easily guarantee steadily carrying out of cutting, meet machine tool chief axis rotation direction standard, easy to loading and unloading under the support of high-performance chuck, helical angle was relatively good at 30 °～45 ° during the present invention used.
Embodiment 3:
Embodiment 1 or 2 described pineapple slotting cutters for carbon fibre reinforced composite, described cutter footpath 0.80mm to 3.175mm, handle footpath 3.175mm.The processing of the most suitable thin layer composite material.
Embodiment 4:
Embodiment 1 or 2 or 3 described pineapple slotting cutters for carbon fibre reinforced composite, 35 °-55 ° of described helical angles adopt the helical angle that changes, and the variation of the helical angle of single cutter is no more than 5 °.The helixangleβ of helical edges slotting cutter is exactly cutting edge inclination λ s, larger helical angle can increase the number of teeth of working simultaneously, reduce the impact in the milling process and increase its stationarity, and slotting cutter keen edge, true rake are increased. in addition, cutting always appearred in the upmilling side, and in contrast, leaking always appears in the climb cutting side cuts, and crosses the amount of cutting and stretch out the farthest with the maximum point that leaks the amount of cutting at slotting cutter. the cutter distortion rule when this point meets upmilling, climb cutting and the deformation rule of cutter extension elongation.It is the helical angle of unequal (or different) that the present invention adopts, and comprises 2 kinds of implications, the 1st, and be identical along each cutting edge length, and another kind of design is the length along cutting edge, its helical angle changes.For example, one is the helical angle of cutter rake face 30 °, and the angle of middle certain point is 37.5 °, and then the helical angle of knife face can reach 45 °.Helical angle can change to 30 ° since 37 ° too.In working angles, cutter can be subject to the impact of damping, and this is because slotting cutter is cutting along same helix with different angles.Slotting cutter has not identical helicla flute spacing (or different tooth pitches), therefore can produce an out of phase (out-phase) thus cutting movement stop the generation of resonance.For example, one the tooth pitch of 4 slotting end mills (or slotting cutter of variable bit), is 89 ° between the 1st, 2 grooves, is 91 ° between 2,3 grooves, and by that analogy, finally adding up equals 360 °.When standing common with one Milling cutterAdd man-hour, can produce continual harmonic vibration, this is identical take milling cutter ' s helix angle, the cutting edge mean allocation is prerequisite.For the slotting cutter of the given physical dimension of a cover, when you observed from all directions, the variation of its helical angle can not surpass 5 ° scope, otherwise will produce the problem of stable aspect.Resultant result be each cutting edge of a cutter when contacting with surface of the work and moving along surface of the work, all can produce clearly acoustic pattern.Because cutting edge can produce different acoustic patterns, the potential danger that therefore resonance occur may just be left in the basket.Although variable helical angle slotting cutter has identical geometric properties along each bar cutting edge, for every cutting edge, still may produce anterior angle, escape, helix even the fully change from rake face to rear knife face.With this milling cutter processes the time, cutter will constantly change its acoustic pattern.
The helical angle of slotting cutter is less than before 30 °, no matter be climb cutting side or upmilling side, error of perpendicularity value all increases with the increase of helical angle. and helical angle is greater than after 40 °, increase with helical angle diminishes again. and when slotting cutter had less helical angle or larger helical angle is arranged, the form accuracy of its groove milling processing was high.
Embodiment 5:
Embodiment 1 or 2 or 3 or 4 described pineapple slotting cutters for carbon fibre reinforced composite facts have proved.It is 0 ° in helical angle, be cutting edge when being straight sword precision the highest. but from the fundamental characteristics of slotting cutter helical angle as can be known, at this moment be interrupted cut fully, cutting-impact power is large, making required precision to cutter itself is high, machining accuracy is very strong to the dependence of the precision of cutter own, cutting-tool's used life is short, helical angle and 4 sword slotting cutters mill the side experiment on vertical machining centre, the 4 sword slotting cutters that are respectively 30 ° and 55 ° degree with helical angle mill the side, relatively two kinds of slotting cutters are with the variation of cutting width (radially bite) impact on machining accuracy. and end mill diameters is 25mm, being cut material is No. 45 steel of hardness 94HRB. and climb cutting mode and DRY CUTTING are all adopted in cutting. and the cutting parameter unification is: feed speed 100mm/min, cutting speed 26m/min, cutting depth 38mm.The measured error of perpendicularity after the processing, in cutting width when not being large especially, 55 ° large helix angle slotting cutter is higher than the machining accuracy of 30 ° of helical angle slotting cutters. this be since when cutting width hour, the slotting cutter true rake that helical angle is larger is large, and cutting edge is sharp, and incision property is good; The tangential cutting resistance is little, reduces energy consumption and cutter distortion, cuts brisk; Cutting edge is with to be cut the contact point of face many, makes the slotting cutter incision and more steady when cutting out, the fluctuation of cutting resistance is little, weakened in the processing due to the comprehensive effect of the factors such as vibrational excitation of slotting cutter.
By application of the present invention, can assert helical angle: (1) helical angle and cutting resistance: the tangential cutting resistance reduces with the increase of helical angle, and axially cutting resistance increases with the increase of helical angle.(2) helical angle and anterior angle: the increase of helical angle increases the slotting cutter true rake, and cutting edge is sharper.(3) helical angle and machined surface precision: the perpendicularity of general machined surface and flatness tolerance value increase with the increase of helical angle, but helical angle is with the increase of helical angle on the contrary later on greater than 40 ° and reduces trend.(4) helical angle and cutter life: the rate of wear of circumference sword land is directly proportional substantially with the helical angle size; On the other hand, when helical angle is very little, slight tool wear also will obviously reduce the cutting ability of cutter, cause vibration, make cutter can't continue to use.When helical angle is excessive, cutter rigidity variation, the life-span lowers.(5) helical angle be cut material: during the low soft material of workhardness, use large helix angle, to increase anterior angle, the sharpness of raising cutting edge; During the high hard material of workhardness, use low pitch angle, to reduce anterior angle, improve the rigidity of cutting edge.
Helical angle is one of major parameter of helical edges slotting cutter, the change of helical angle size has a significant impact the machinability of cutter. along with the development of Computerized Numerical Control processing technology and Flexible Manufacturing Technology, if further further investigate the helical angle size to the various impacts of helical edges slotting cutter cutting ability, when making and selecting the helical edges slotting cutter, performance in conjunction with lathe and tooling fixture, performance and machining accuracy according to machined material, the combined factors such as working (machining) efficiency and cutter material and cutter life are considered, optimize the size of helical angle, undoubtedly can be efficient to promoting, high-precision Milling Process plays an important role.
Pineapple shape milling cutter of the present invention is used for the various composites such as processing carbon fiber, glass fibre, metal-base composites, glass.When cutting edge length has when necessarily requiring, also can be used for machining sheet, the milling cutter cutting edge is divided into several sections uses.Undoubtedly, be that cost performance is high and be applicable to nearly all solid cemented carbide milling cutter on the market, the present invention adopts the DURA nano-composite plate, compares with common diamond coating, can increase substantially the adhesion of wearability and coating and matrix, thereby improve the life-span of cutter.

Claims (4)

1. pineapple slotting cutter that is used for carbon fibre reinforced composite, its composition comprises: handle of a knife, described handle of a knife connects the cutter neck of alloy material, described cutter neck has dextrorotation cutter tooth band and dextrorotation cutter tooth, have left-hand teeth and left-handed teeth groove on the described dextrorotation cutter tooth band, have nano-composite plate on described dextrorotation cutter tooth and the described left-hand teeth.
2. described pineapple slotting cutter for carbon fibre reinforced composite according to claim 1, it is characterized in that: the described right-hand teeth number of teeth is 2-8,30 °-60 ° of helical angles.
3. described pineapple slotting cutter for carbon fibre reinforced composite according to claim 1 and 2, it is characterized in that: described cutter footpath 0.80mm to 3.175mm, 3.175mm described cutter neck in handle footpath adopts hard alloy bar and tungsten steel bar, and described dextrorotation cutter tooth and described left-hand teeth use ultrafine crystal grain hard alloy material.
4. according to claim 1 and 2 or 3 described pineapple slotting cutters for carbon fibre reinforced composite, it is characterized in that: 40 °-45 ° of described helical angles, the variation of the helical angle of single cutter is no more than 5 °.
CN2013100378788A 2013-01-31 2013-01-31 Pineapple end mill for carbon fiber reinforced composite Pending CN103071840A (en)

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Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103770223A (en) * 2014-01-22 2014-05-07 上海弗洛勒斯新材料科技有限公司 Nano-diamond coating cutting tool and application thereof to mouth rehabilitation ceramic machining
CN105081377A (en) * 2015-08-10 2015-11-25 江苏塞维斯数控科技有限公司 Boring tool for numerical control machine tool
CN105562800A (en) * 2016-03-18 2016-05-11 哈尔滨理工大学 Double-edge milling cutter for machining carbon fiber composite material
CN106061660A (en) * 2014-02-25 2016-10-26 山高刀具公司 Stacked material tool and method for machining
CN108372324A (en) * 2018-04-25 2018-08-07 浙江瑞亨精密工具有限公司 The processing method in slot or hole on a kind of milling cutter and wiring board for processing line plate
CN108655424A (en) * 2018-03-09 2018-10-16 深圳市浪石科技有限公司 A kind of special construction cutter
CN109262448A (en) * 2017-07-17 2019-01-25 宁波江丰电子材料股份有限公司 The processing method of groove milling
WO2019047557A1 (en) * 2017-09-11 2019-03-14 大连理工大学 Micro-teeth arrangement designable end mill having tip blade for dedicated use with carbon fiber composite material
CN110191778A (en) * 2017-01-16 2019-08-30 山高刀具公司 Rotary cutting tool
CN111054954A (en) * 2019-12-18 2020-04-24 成都飞机工业（集团）有限责任公司 Method for processing stainless steel aluminum honeycomb sandwich part
CN111741827A (en) * 2018-02-26 2020-10-02 伊斯卡有限公司 End mill with peripheral cutting edge of variable angle configuration
CN111889766A (en) * 2020-06-17 2020-11-06 成都飞机工业（集团）有限责任公司 Method for processing cellular material hole characteristics
CN112139573A (en) * 2020-08-21 2020-12-29 成都飞机工业（集团）有限责任公司 Numerical control machining method for preventing sharp corner of carbon fiber part from layering

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Cited By (17)

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Publication number Priority date Publication date Assignee Title
CN103770223A (en) * 2014-01-22 2014-05-07 上海弗洛勒斯新材料科技有限公司 Nano-diamond coating cutting tool and application thereof to mouth rehabilitation ceramic machining
CN103770223B (en) * 2014-01-22 2016-10-19 上海祥仁新材料有限公司 Nano diamond coating cutter and the application in Oral Repair Ceramic manufacturing thereof
CN106061660A (en) * 2014-02-25 2016-10-26 山高刀具公司 Stacked material tool and method for machining
CN105081377A (en) * 2015-08-10 2015-11-25 江苏塞维斯数控科技有限公司 Boring tool for numerical control machine tool
CN105562800A (en) * 2016-03-18 2016-05-11 哈尔滨理工大学 Double-edge milling cutter for machining carbon fiber composite material
CN110191778B (en) * 2017-01-16 2020-10-02 山高刀具公司 Rotary cutting tool
CN110191778A (en) * 2017-01-16 2019-08-30 山高刀具公司 Rotary cutting tool
CN109262448A (en) * 2017-07-17 2019-01-25 宁波江丰电子材料股份有限公司 The processing method of groove milling
WO2019047557A1 (en) * 2017-09-11 2019-03-14 大连理工大学 Micro-teeth arrangement designable end mill having tip blade for dedicated use with carbon fiber composite material
CN111741827A (en) * 2018-02-26 2020-10-02 伊斯卡有限公司 End mill with peripheral cutting edge of variable angle configuration
CN111741827B (en) * 2018-02-26 2023-09-29 伊斯卡有限公司 End mill with variable angle configuration peripheral cutting edge
CN108655424A (en) * 2018-03-09 2018-10-16 深圳市浪石科技有限公司 A kind of special construction cutter
CN108372324A (en) * 2018-04-25 2018-08-07 浙江瑞亨精密工具有限公司 The processing method in slot or hole on a kind of milling cutter and wiring board for processing line plate
CN111054954A (en) * 2019-12-18 2020-04-24 成都飞机工业（集团）有限责任公司 Method for processing stainless steel aluminum honeycomb sandwich part
CN111054954B (en) * 2019-12-18 2021-06-08 成都飞机工业（集团）有限责任公司 Method for processing stainless steel aluminum honeycomb sandwich part
CN111889766A (en) * 2020-06-17 2020-11-06 成都飞机工业（集团）有限责任公司 Method for processing cellular material hole characteristics
CN112139573A (en) * 2020-08-21 2020-12-29 成都飞机工业（集团）有限责任公司 Numerical control machining method for preventing sharp corner of carbon fiber part from layering

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