WO2009149694A1 - Outil de fraisage pour le fraisage de plastiques renforcés de fibres - Google Patents

Outil de fraisage pour le fraisage de plastiques renforcés de fibres Download PDF

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Publication number
WO2009149694A1
WO2009149694A1 PCT/DE2009/000788 DE2009000788W WO2009149694A1 WO 2009149694 A1 WO2009149694 A1 WO 2009149694A1 DE 2009000788 W DE2009000788 W DE 2009000788W WO 2009149694 A1 WO2009149694 A1 WO 2009149694A1
Authority
WO
WIPO (PCT)
Prior art keywords
milling tool
milling
tool according
cutting
main cutting
Prior art date
Application number
PCT/DE2009/000788
Other languages
German (de)
English (en)
Inventor
Jens Mario Lange
Günther Hartmann
Ingo V. Puttkamer
Original Assignee
Gühring Ohg
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Gühring Ohg filed Critical Gühring Ohg
Publication of WO2009149694A1 publication Critical patent/WO2009149694A1/fr

Links

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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2228/00—Properties of materials of tools or workpieces, materials of tools or workpieces applied in a specific manner
    • B23B2228/10—Coatings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2250/00—Compensating adverse effects during turning, boring or drilling
    • B23B2250/12—Cooling and lubrication
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C2210/00—Details of milling cutters
    • B23C2210/04—Angles
    • B23C2210/0407—Cutting angles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C2210/00—Details of milling cutters
    • B23C2210/28—Arrangement of teeth
    • B23C2210/282—Unequal angles between the cutting edges, i.e. cutting edges unequally spaced in the circumferential direction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C2210/00—Details of milling cutters
    • B23C2210/44—Margins, i.e. the part of the peripheral suface immediately adacent the cutting edge
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C2215/00—Details of workpieces
    • B23C2215/04—Aircraft components
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C2226/00—Materials of tools or workpieces not comprising a metal
    • B23C2226/27—Composites, e.g. fibre reinforced composites
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C2226/00—Materials of tools or workpieces not comprising a metal
    • B23C2226/31—Diamond
    • B23C2226/315—Diamond polycrystalline [PCD]

Definitions

  • the invention relates to a milling tool for milling fiber-reinforced plastics (CFRP).
  • CFRP fiber-reinforced plastics
  • Carbon fiber reinforced plastic refers to a fiber-plastic composite material in which carbon fibers, usually in several layers, are embedded as reinforcement in a matrix (eg of plastic).
  • the matrix usually consists of duromers, for example epoxy resin or thermoplastics.
  • the carbon fiber can also be bonded in a ceramic matrix (see ceramic fiber composite materials).
  • metal matrix composites mmc
  • fiber-reinforced plastics are relatively difficult to machine.
  • conventional milling tools were used, there was frequently fraying, ejection and delamination of the outer layers or thermal degradation of the fiber-reinforced composite materials.
  • Delamination refers to the extraction of individual fibers from the fiber composite as a result of destruction of the same by the milling. With increasing wear of the milling tool in the area of the cut surface protruding fibers of the fiber composite are then no longer cut properly, but only knocked off due to the cutting pulse. This force on the fiber composite ultimately leads to fraying of the edges of the machined holes.
  • the composite material plate In addition to the delamination, the composite material plate also experiences a friction in the area of the cut surfaces of the fiber composite due to the cutting forces or with increasing wear of the milling tool between the milling tool and the workpiece local warming. In the worst case, this heating can lead to a flow of the epoxy resin of the matrix of the fiber composite and thus to a bonding of the dust produced during the milling process to the cut surfaces of the fiber composite. Furthermore, such milling conditions are at the expense of the service life of the milling tools.
  • the cutting force per circumferential cutting edge can be disassembled with respect to the axis of rotation of the milling tool into an axially acting cutting force component and a cutting force component acting in the cutting direction.
  • the cutting edge geometries of the peripheral cutting edges of the milling tool are now designed such that the axial force acting cutting force components of two peripheral cutting with opposite cutting geometry in opposite directions, preferably directed against each other, are oriented.
  • the fiber-reinforced composite material experiences both cutting forces acting in one and the other axial direction of the milling tool, whereby individual fibers from the Fiber composite of the fiber-reinforced plastic layer are reliably cut off.
  • a detachment and knocking off individual fibers from the fiber composite and thus fraying the composite material plate can therefore be limited.
  • a disadvantage of compression cutters considered a limited number of blades compared to Dahlbertfräsem.
  • the opposing cutting geometries require a certain manufacturing effort, resulting in higher costs.
  • the present invention seeks to provide a milling tool for milling fiber-reinforced plastics with an optimized for the processing of fiber reinforced plastics cutting geometry.
  • An inventive milling tool which is preferably made of Voühartmetail, has a shank and a preferably straight-grooved cutting part with a plurality of circumferentially formed main cutting edges. Along each main cutting edge, a chamfer with a width of 0.1 to 0.3 mm, forming a bevel clearance angle of 4 ° to 8 °, preferably 6 ° ⁇ 1 °, should be formed upstream of the main clearance.
  • the chamfer running along each main cutting edge reduces the clearance angle by 4 ° to 8 ° in the main clearance area adjacent to the main cutting edge.
  • the thus achieved defusing the cutting wedge results in a stabilization of the main cutting edge and thus in an increase in the service life of the milling tool.
  • Limiting the chamfer width of the chamfer to 0.1 to 0.3 mm ensures that the formation of a built-up edge by CFK material caking is avoided.
  • the milling tool can be driven with a relatively large feed through the workpiece to be machined.
  • the milling tool according to the invention preferably has a shaft which is reinforced in diameter relative to the cutting part. Due to the shorter feed time of each main cutting edge resulting from a larger feed, overheating of the workpiece to be machined can be briefly adhere, which results in a reduced temperature damage of the material to be processed and consequently a reduced built-up edge formation in the free area adjacent to the main cutting edges.
  • the interaction of the parameters determining the main cutting geometry thus ensures that the main cutting edges do not break away to the rear.
  • the formation of built-up edges is prevented in the open space adjacent to the main cutting edges.
  • the reduction of the clearance angle in the region of the spatially limited bevel therefore results in the advantage of maintaining a consistent cutting performance and thus in a high surface quality and high Fräswerkmaschinestand documentation.
  • the groove base is advantageously rounded.
  • At least the cutting part advantageously has a wear protection coating, preferably a diamond coating.
  • a cooling and / or lubricant supply to the cutting part In a preferred embodiment, a cooling and / or lubricant supply to the cutting part.
  • the milling tool for cooling and / or lubricant supply a centrally traversing, frontally emerging channel formed on the shank longitudinal slots or a central channel at a predetermined distance from the end face of the milling tool in a plurality of, preferably two, branch channels merges, which are each aligned at an acute angle to the axis of rotation of the milling tool from the end face toward the shaft out.
  • the milling tool usually travels a contour on the CFRP part.
  • This contour is introduced as a groove in a support of the vacuum device supporting the CFRP part.
  • the variant is advantageously used with the milling tool centrally traversing, frontally emerging channel. Due to the central coolant and / or lubricant supply, an increased pressure is created below the CFRP part in the groove compared to the region above the CFRP part. In conjunction with the suction that takes place above the CFRP part, it is possible to prevent CFRP powder chips resulting from the milling process from falling into the groove, accumulating there and, in the worst case, blocking the milling tool.
  • the CFRP part is e.g. is stretched on a variable device with suction cups, then only an overhang is milled. In this case, the shaft cooling is more advantageous.
  • the above-mentioned cooling and / or lubricant supply via a central channel, which does not extend over the full length of the milling tool, but at a predetermined distance from the end face of the milling tool in a plurality from, preferably two, branch channels, which are aligned at an acute angle to the axis of rotation of the milling tool from the end face toward the shaft, is regardless of whether the machined CFRP part on the above-described vacuum device or the variable device is sucked with suction cups.
  • a screen or conical jacket-like cooling and / or lubricant funnel of increased pressure can form over 360 ° around the milling tool during milling of a CFRP part due to the rotation of the milling tool below the CFRP part.
  • This shielded or conical jacket-like cooling and / or lubricant funnel of increased pressure effectively contributes to the fact that CFRP puffing chips produced during milling are detected by the above-mentioned milling hole in the CFRP part from the suction located above the CFRP part. It has already been confirmed in tests that the dynamic outlet pressure of the coolant and / or lubricant distributed over 360 ° reliably entrains the CFC powder chips produced during milling in the direction of a suction device arranged above the CFRP part.
  • the milling tool can be additionally provided with formed on the front side of the cutting part minor cutting.
  • the secondary cutting edges can each be assigned a chamfer which adjoins the secondary flank and which forms a chamfer angle of 4 ° to 8 ° and has a width of 0.1 to 0.3 mm, analogous to the chamfers running along the main cutting edges.
  • Fig. 1 shows a side view of a milling tool according to the invention according to a preferred embodiment
  • Fig. 2 shows a cross section through the cutting part of the milling tool according to the invention according to the preferred embodiment
  • Fig. 3 shows an enlarged end view of a circled in Fig. 1 corner region Z;
  • Fig. 4 shows schematically a cooling and / or lubricant supply system for the milling tool according to the invention;
  • Fig. 5 shows schematically another cooling and / or lubricant supply system for the milling tool according to the invention.
  • Fig. 6. shows schematically another cooling and / or lubricant supply system for the milling tool according to the invention.
  • the milling tool 10 that can be driven in rotation about a rotation axis 11 is made in one piece from solid carbide! and has a friction and / or wear-reducing surface protection coating. in particular a diamond coating with a layer thickness of 0.008 + 0.002 mm.
  • the milling tool 10 has 13 teeth or main cutting edges 16.
  • each one of the main relief surface 17 upstream chamfer 18 is formed.
  • the chamfer 18 forms, as indicated in Fig. 3, a chamfer angle QF of 6 ° ⁇ 1 ° and has a width B F of 0.2 ⁇ 0.05 mm.
  • the milling tool 10 shown in Fig. 1 to 3 is formed without end cutting It also has a not visible in the figures formed on the front side 13 Eckenschut ⁇ fase, with a width of 1 mm at an angle! from 45 ° ⁇ 2 ° with respect to the axis of rotation 11 in the circumferential direction. Further, the groove bottom 19, as shown in Fig. 3, rounded forms.
  • the parameters determining the cutting geometry for the embodiment shown in FIGS. 1 to 3 are summarized:
  • the milling tool 10 further has a over the entire length L the milling tool 10 centrally traversing, frontally emerging channel 20 for cooling and / or lubricant supply (in particular clean air or a standard Minimaimengenschmtechnik (MMS) -Kühl- / Schmierrnittel).
  • the milling tool 10 shown in FIGS. 1 to 3, as shown schematically in FIG. 4, is used for machining CFRP parts clamped on a vacuum holding device 40 in order to drive off a specific contour on the CFK part.
  • the vacuum holding device 40 has a holder 41 supporting the CFRP part CFK to be machined, into which groove 42 is inserted, which runs correspondingly to the contour to be milled in the CFRP part CFK, and one above the CFRP part CFK arranged, provided on the machine suction device 44 which generates above the CFRP part CFK a region of low pressure (P2).
  • the milling tool 10 for milling a CFRP part CFK is guided such that the end face 13 is located at a distance from the groove bottom of the groove 42.
  • the cooling and / or lubricant supply takes place through the central channel 20 in the groove 42.
  • the cutting part may have a slight left or right twist.
  • the number of circumferentially formed teeth or main cutting edges can vary depending on the milling diameter, so that for a larger milling diameter, the number of teeth or Hautptwort is greater than for a smaller milling diameter.
  • the milling tool can be additionally provided with formed on its front side cutting edges.
  • the secondary cutting edges can each be assigned a chamfer which adjoins the secondary flank and which forms a chamfer angle of 4 ° to 8 ° and has a width of 0.1 to 0.3 mm, analogous to the chamfers running along the main cutting edges.
  • the milling tool 10 can have longitudinal slots 50 formed on the shaft 12, via which coolant and / or lubricant supply is conveyed in the direction of the cutting part 14.
  • This type of cooling and / or lubricant supply is relatively simple and inexpensive to implement in terms of production and causes good cooling of the milling tool 10.
  • it can lead to a stronger turbulence of the CFC powder chips, which is why a Absaugu ⁇ g CFK Powder chips can make more difficult.
  • FIG. 6 illustrates a schematic representation of another alternative to the central coolant and / or lubricant supply illustrated in FIG. 4.
  • the coolant and / or lubricant supply initially also takes place via a central channel 60 formed in the milling tool 10.
  • central channel 60 Unlike the exemplary embodiment shown in FIGS central channel 60 but not over the full length of the milling tool 10, but passes at a predetermined distance T1 from the end face 13 in a plurality of, preferably two, branch channels 61, 62, which at an acute angle ⁇ to the axis of rotation of the milling tool of the End face 13 are directed away towards the shaft 12 out.
  • the outlet openings of the branch channels 61, 62 lie at a greater distance T2 to the end face 13 of the cutting part 14 than the branching of the central channel 60 into the branch channels 61, 62 (T2> T1).
  • T2 the distance to the end face 13 of the cutting part 14
  • T1 the branching of the central channel 60 into the branch channels 61, 62
  • a shield or conical-shaped cooling and / or lubricant funnel 63 increased pressure (P1) 360 ° around the milling tool around, as shown schematically in Fig. 6.
  • This shielded or conical jacket-like cooling and / or lubricant funnel 63 of increased pressure (P1) effectively contributes to the fact that CFC powder chips produced during milling process via the milling hole FL formed in the CFRP part CFK from the above the CFRP part CFK extraction device 64 are recorded.
  • the exhaust device 64 generates a region of low pressure P2 (P2 ⁇ P1) (vacuum) above the CFRP part CFK.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Milling Processes (AREA)

Abstract

L'invention concerne un outil de fraisage (10) pour le fraisage de plastiques renforcés de fibres, lequel outil comporte une tige (12) et un élément de coupe (14) pourvu d'une pluralité d'arêtes de coupe principales (16) réalisées sur le pourtour dudit élément. Selon l'invention, un biseau (18) d'une largeur (BF) de 0,1 à 0,3 mm, de préférence de 0,2 mm, est réalisé le long de chaque arête de coupe principale (16), le biseau étant réalisé en amont de la face de dépouille principale (17) et formant un angle de dépouille (αF) de 4° à 8°, de préférence de 6° ± 1°.
PCT/DE2009/000788 2008-06-13 2009-06-05 Outil de fraisage pour le fraisage de plastiques renforcés de fibres WO2009149694A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE102008028302 2008-06-13
DE102008028302.9 2008-06-13
DE102008034784.1A DE102008034784B4 (de) 2008-06-13 2008-07-25 Fräswerkzeug zum Fräsen faserverstärkter Kunststoffe
DE102008034784.1 2008-07-25

Publications (1)

Publication Number Publication Date
WO2009149694A1 true WO2009149694A1 (fr) 2009-12-17

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PCT/DE2009/000788 WO2009149694A1 (fr) 2008-06-13 2009-06-05 Outil de fraisage pour le fraisage de plastiques renforcés de fibres

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DE (1) DE102008034784B4 (fr)
WO (1) WO2009149694A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112676620A (zh) * 2019-10-17 2021-04-20 肯纳金属公司 旋转切割工具及其应用

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010004570B4 (de) * 2010-01-12 2011-09-22 Tutech Innovation Gmbh Verfahren zum Fräsen von langfaserverstärkten Verbundkunststoffen
DE102011054677B4 (de) 2011-10-20 2023-11-16 Gühring KG Fräswerkzeug
KR101555040B1 (ko) * 2012-07-04 2015-09-22 이태건 면취용 공구
DE102013000942A1 (de) 2013-01-19 2014-03-13 Daimler Ag Spanabhebendes Werkzeug
US9623491B2 (en) 2013-06-11 2017-04-18 Thomas M. Dieckilman Beveling / chamfering tool—router head for metal
DE102019109692A1 (de) * 2019-04-12 2020-10-15 Gühring KG Fräswerkzeug zum Fräsen von faserverstärkten Kunststoffen
CN113867436B (zh) * 2021-09-17 2022-07-01 深圳市海一电器有限公司 智能烹饪方法及系统

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Publication number Priority date Publication date Assignee Title
GB1161969A (en) * 1968-03-07 1969-08-20 Marwn Cutting Tools Ltd End-Milling Cutters
DE2533079B1 (de) * 1975-07-24 1976-08-05 Wezel & Co Biax Werkzeuge Fraeswerkzeug
DE2851924A1 (de) * 1978-11-30 1980-06-26 Siemens Ag Gekuppelter walzenstirnfraeser
JPS63193615A (ja) * 1987-02-05 1988-08-10 Nec Corp テスト回路
JPH01321108A (ja) * 1988-06-17 1989-12-27 Nisshin Kogu Seisakusho:Kk スモールリリーフ付き切削工具
JPH04210315A (ja) * 1990-08-10 1992-07-31 Nachi Fujikoshi Corp 回転切削工具
EP0579371A1 (fr) * 1992-06-17 1994-01-19 Makino Milling Machine Co. Ltd. Une méthode et un appareil pour l'usinage d'une pièce
EP1285713A1 (fr) * 2001-07-13 2003-02-26 Airbus France Outil de coupe rotatif et procédé de lubrification
WO2005025794A1 (fr) * 2003-09-12 2005-03-24 Seco Tools Ab Outil d'usinage a evacuation des copeaux avec canal central
WO2006041353A1 (fr) * 2004-09-06 2006-04-20 Sandvik Intellectual Property Ab Fraise, piece rapportee de coupe pour fraise et fraise monobloc
DE202006006114U1 (de) * 2006-04-15 2006-06-14 Günther Wirth Hartmetallwerkzeuge GmbH & Co. KG Zylindrisches Fräswerkzeug
WO2007053171A1 (fr) * 2005-11-01 2007-05-10 Berkshire Precision Tool, Llc Outil de coupe rotatif avec une répartition non uniforme des dispositifs brise-copeaux
EP2030712A1 (fr) * 2007-08-30 2009-03-04 Snecma Fraise à rainurer pour usinage à grande avance et à faible profondeur de passe

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JP2000246532A (ja) 1999-02-26 2000-09-12 Hitachi Tool Engineering Ltd エンドミル
DE20021264U1 (de) 2000-12-15 2001-04-05 Wilhelm Fette Gmbh, 21493 Schwarzenbek Schaftfräser für die Bearbeitung von Werkstücken aus Nichteisenmetall oder Kunststoff
DE102006022572B4 (de) 2006-05-15 2016-11-17 Gühring KG Fräswerkzeug

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1161969A (en) * 1968-03-07 1969-08-20 Marwn Cutting Tools Ltd End-Milling Cutters
DE2533079B1 (de) * 1975-07-24 1976-08-05 Wezel & Co Biax Werkzeuge Fraeswerkzeug
DE2851924A1 (de) * 1978-11-30 1980-06-26 Siemens Ag Gekuppelter walzenstirnfraeser
JPS63193615A (ja) * 1987-02-05 1988-08-10 Nec Corp テスト回路
JPH01321108A (ja) * 1988-06-17 1989-12-27 Nisshin Kogu Seisakusho:Kk スモールリリーフ付き切削工具
JPH04210315A (ja) * 1990-08-10 1992-07-31 Nachi Fujikoshi Corp 回転切削工具
EP0579371A1 (fr) * 1992-06-17 1994-01-19 Makino Milling Machine Co. Ltd. Une méthode et un appareil pour l'usinage d'une pièce
EP1285713A1 (fr) * 2001-07-13 2003-02-26 Airbus France Outil de coupe rotatif et procédé de lubrification
WO2005025794A1 (fr) * 2003-09-12 2005-03-24 Seco Tools Ab Outil d'usinage a evacuation des copeaux avec canal central
WO2006041353A1 (fr) * 2004-09-06 2006-04-20 Sandvik Intellectual Property Ab Fraise, piece rapportee de coupe pour fraise et fraise monobloc
WO2007053171A1 (fr) * 2005-11-01 2007-05-10 Berkshire Precision Tool, Llc Outil de coupe rotatif avec une répartition non uniforme des dispositifs brise-copeaux
DE202006006114U1 (de) * 2006-04-15 2006-06-14 Günther Wirth Hartmetallwerkzeuge GmbH & Co. KG Zylindrisches Fräswerkzeug
EP2030712A1 (fr) * 2007-08-30 2009-03-04 Snecma Fraise à rainurer pour usinage à grande avance et à faible profondeur de passe

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112676620A (zh) * 2019-10-17 2021-04-20 肯纳金属公司 旋转切割工具及其应用
CN112676620B (zh) * 2019-10-17 2024-02-02 肯纳金属公司 旋转切割工具及其应用

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DE102008034784B4 (de) 2023-04-13
DE102008034784A1 (de) 2009-12-17

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