WO2012072652A1 - Outil de forage pour enlever les copeaux de matériaux en plastique renforcé par des fibres de carbone - Google Patents

Outil de forage pour enlever les copeaux de matériaux en plastique renforcé par des fibres de carbone Download PDF

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Publication number
WO2012072652A1
WO2012072652A1 PCT/EP2011/071326 EP2011071326W WO2012072652A1 WO 2012072652 A1 WO2012072652 A1 WO 2012072652A1 EP 2011071326 W EP2011071326 W EP 2011071326W WO 2012072652 A1 WO2012072652 A1 WO 2012072652A1
Authority
WO
WIPO (PCT)
Prior art keywords
cutting edge
drill
main cutting
hard
drill according
Prior art date
Application number
PCT/EP2011/071326
Other languages
German (de)
English (en)
Inventor
Ingo Von Puttkamer
Dominik Gerlach
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 WO2012072652A1 publication Critical patent/WO2012072652A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B51/00—Tools for drilling machines
    • B23B51/02—Twist drills
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2226/00—Materials of tools or workpieces not comprising a metal
    • B23B2226/27—Composites
    • B23B2226/275—Carbon fibre reinforced carbon composites
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2251/00—Details of tools for drilling machines
    • B23B2251/08—Side or plan views of cutting edges
    • B23B2251/082—Curved cutting edges

Definitions

  • the invention relates to a drilling tool for cutting KohlestoffmaschinenverSystemten
  • Plastic such as carbon fiber reinforced plastic (CFRP)
  • CFRP carbon fiber reinforced plastic
  • Major cutting profiles are known, such as the so-called “Racon Point” geometry (Radius-Conical, i.e. the radius extends over the entire length of the main cutting edge), or the Bickford-Point geometry (the radius extends only over the outer one
  • Main cutting section while a central section with a linear main cutting path forms a good centering point).
  • Bolnemmfang passes so that a sharp cutting edge is completely bypassed.
  • US Pat. No. 1,309,706 describes a drill with a main cutting profile, in which the main cutting edge follows a radius in an outer section in a plane defined by the drill axis and the cutting corner and extends linearly in a central section.
  • the transition secondary cutting edge - main cutting edge is not tangential, but at a certain angle.
  • the remaining cutting corner is thus at least much duller than conventional drills with a straight main cutting path in the above plane.
  • CFRP carbon fiber reinforced plastic
  • the per se known merlanal of a main cutting edge which runs continuously convexly from the cutting corner in the axial direction under a radius, is first transferred to drills with a sharpening. Due to the main cutting path according to the invention with a taper, it is now possible, the geomeü-related advantages - avoiding a sharp cutting edge, extension of the main cutting edge and reducing the load per main cutting length unit, especially in the outer region and reducing the pressure in
  • CFRP carbon fiber reinforced plastic
  • the drill material is so-called. Ceimets, Schneidcerceriks and hard metals, e.g. based on WC-TiC-Co.
  • main cutting edge not only a main cutting edge extending in a plane parallel to the drill axis under a radius is conceivable, but also other continuously convex curvatures, such as, for example, a parabolic or hyperbolic curvature
  • the drill according to the invention has a tangential main cutting profile, i. the main cutting edge is fully tangential to the drill circumference. In comparison one
  • Tip area with a cutting edge that shortens the main cutting edge lengthens the usable tip area of a tangential major cutting edge. Due to the tangential passing main cutting edge, the heat dissipation improves, thereby reducing the thermal overload and the mechanical stress is reduced.
  • the smooth transition of the main cutting edge into the outer circumference of the drill diameter causes a reduction in wear, since the working area of the cutting edge at the outer circumference has the highest stepping speed and prevents delamination since the diameter to be drilled is slowly reached or drilled by the extended tip region.
  • the main cutting also has a Ausspitzung in the central portion.
  • the taper sharpens the transverse cutting edge of the drill and increases the area of the groove to reduce the pressure in the center of the drill.
  • the main cutting edge on the cross cutting edge has an additional chip and an open surface, whereby the main cutting edge in the center of the drill receives a concave shape. This is to reduce the pressure on the drill center, thereby avoiding breakage of the colloid-fiber reinforced plastic material as it exits the bore.
  • the geometry according to the invention can be used with straight or spirally grooved drills.
  • a substantially cone-shaped bevel or a bevel with divided open surfaces is suitable in the manner of a 4-surface grinding. Several surfaces together form the free surface of the convex main cutting edge and the concave main cutting edge has at least one free surface.
  • the bolirer advantageously has a small Spanwinlcel in the area of Querscimeide.
  • the small Spanwinlcel an increase of the stability of the cutting wedge can be achieved.
  • the Spanwinlcel the main cutting edge can be corrected in particular in coiled drills by a Weintexlcorrektur, or an additional Schoclxneidenkorrekrurschliff to the desired level, so that the desired cutting wedge stability and
  • the drill is designed so that the Haupttexlcorrelctur can be ground in one go with the Querstedausspitzung.
  • the proposed geometry of the drill tip is particularly suitable for double-edged drills.
  • the use of three-knife or drill with a leading main cutting web and a trailing friction ahlensteg each subdivided by an additional clamping web would be conceivable.
  • the cooling channels can have an elliptical or trigoniform cross-sectional profile, in particular for drills with smaller nominal diameters. It would also be conceivable on the drill axis extending through the drill and in the region of the drill tip Y-shaped spread mecanicahlkanal conceivable.
  • the mouth openings are preferably on the open spaces of the webs.
  • the mouth openings are thereby widened by an additional relief grinding to the web back and thus to the flute by a Steigücken to the web Irin steeper than the free surface sloping relief cut to a higher throughput in the direction of saving groove out.
  • Minimum quantity lubrication (MQL) with an oil-air aerosol is possible to cool the drill bit and to reduce the frictional resistance during machining and chip removal by lubrication.
  • the cutting insert is an insert, which is screwed on the drill in the circumferential direction.
  • the entire drill tip with two main cutting edges and secondary cutting elements (-absclmitten) be designed as an insert, which is inserted into a designated receiving groove on the front side of the carrier and screwed or soldered there.
  • the cutting geometry does not need to be ground directly into the hard material on the drill, but can - at least in sections - are ground on easily accessible hard material inserts.
  • Fig. 1 is a schematic side view of a spiral grooved drill according to an embodiment of the invention
  • Fig. 2 is a schematic side view of a spiral grooved drill in plan view.
  • FIG. 1 There is a double-edged drill bit 10. With 1 the main cutting edge is concave 12 and with 8 the main cutting edge of the drill 10 is denoted by 11, with 5 the transverse cutting edge, 2 the tangential course the main sheath to the outer circumference of the drill diameter and with 3 the Mausclrneide. As can be seen, the main cimeide 1, starting from the center of the drill in radii direction, runs cocavely and merges into a convexly rounded main cutting edge, which continues gently into a secondary cutting edge 3.
  • the course of the main cutting edge 1 is determined by the Ausspitzung 4, which shortens the transverse cutting edge 5 and interrupts the convex flank profile 7 of the convex main cutting edge 8.
  • the main cutting edge 1 has a concave profile, which has a chip and a clearance angle.
  • FIG. 2 the rake angle 6 and the clearance angle 9 of the main cutting edge 1 are shown.
  • the rake surface 6 has at the Hauptsimeime 1 a steeper angle compared to the adjacent angle of the free surface.

Abstract

L'invention concerne un foret pour matériaux durs comportant des éléments de liaison séparés par des goujures et au moins deux arêtes principales qui présentent un profil tangentiel par rapport au pourtour externe du diamètre du foret et une transition vers l'arête transversale. L'arête principale est au moins partiellement concave, à partir de l'arête transversale dans le sens radial vers l'extérieur relativement au diamètre extérieur du foret.
PCT/EP2011/071326 2010-11-29 2011-11-29 Outil de forage pour enlever les copeaux de matériaux en plastique renforcé par des fibres de carbone WO2012072652A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010052630 2010-11-29
DE102010052630.4 2010-11-29

Publications (1)

Publication Number Publication Date
WO2012072652A1 true WO2012072652A1 (fr) 2012-06-07

Family

ID=45422110

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2011/071326 WO2012072652A1 (fr) 2010-11-29 2011-11-29 Outil de forage pour enlever les copeaux de matériaux en plastique renforcé par des fibres de carbone

Country Status (1)

Country Link
WO (1) WO2012072652A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140294527A1 (en) * 2013-03-26 2014-10-02 Kennametal Inc. Tool head and method for machining a metallic workpiece
US9604285B2 (en) * 2014-03-13 2017-03-28 Kennametal, Inc. Rotary tool and method for manufacturing
US20220305571A1 (en) * 2021-03-29 2022-09-29 Iscar, Ltd. Rotatable cutting head having tip portion with three radially extending cutting edges forming a rectilinear rotational profile

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1309706A (en) 1919-07-15 Twist-drill
US3443459A (en) 1968-02-14 1969-05-13 Bruce Alexander Mackey Drill
US4116580A (en) * 1977-04-08 1978-09-26 Mcdonnell Douglas Corporation All cutting edge drill
DE102006025294A1 (de) * 2006-05-31 2007-12-06 Kennametal Inc. Bohrwerkzeug
EP1902799A2 (fr) * 2006-09-25 2008-03-26 Sandvik Intellectual Property AB Outil pour enlèvement de matière et insert de coupe pour usinage
US20100158626A1 (en) * 2008-12-23 2010-06-24 Tatsuo Nakahata Drill and drilling method for workpiece

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1309706A (en) 1919-07-15 Twist-drill
US3443459A (en) 1968-02-14 1969-05-13 Bruce Alexander Mackey Drill
US4116580A (en) * 1977-04-08 1978-09-26 Mcdonnell Douglas Corporation All cutting edge drill
DE102006025294A1 (de) * 2006-05-31 2007-12-06 Kennametal Inc. Bohrwerkzeug
EP1902799A2 (fr) * 2006-09-25 2008-03-26 Sandvik Intellectual Property AB Outil pour enlèvement de matière et insert de coupe pour usinage
US20100158626A1 (en) * 2008-12-23 2010-06-24 Tatsuo Nakahata Drill and drilling method for workpiece

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140294527A1 (en) * 2013-03-26 2014-10-02 Kennametal Inc. Tool head and method for machining a metallic workpiece
DE102013205363A1 (de) * 2013-03-26 2014-10-02 Kennametal Inc. Werkzeugkopf sowie Verfahren zur Bearbeitung eines metallischen Werkstücks
US9415450B2 (en) 2013-03-26 2016-08-16 Kennametal Inc. Tool head and method for machining a metallic workpiece
DE102013205363B4 (de) 2013-03-26 2022-01-05 Kennametal Inc. Werkzeugkopf sowie Verfahren zur Bearbeitung eines metallischen Werkstücks
US9604285B2 (en) * 2014-03-13 2017-03-28 Kennametal, Inc. Rotary tool and method for manufacturing
US20220305571A1 (en) * 2021-03-29 2022-09-29 Iscar, Ltd. Rotatable cutting head having tip portion with three radially extending cutting edges forming a rectilinear rotational profile
US11951553B2 (en) * 2021-03-29 2024-04-09 Iscar, Ltd. Rotatable cutting head having tip portion with three radially extending cutting edges forming a rectilinear rotational profile

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