EP2451602A1 - Fraise en bout - Google Patents

Fraise en bout

Info

Publication number
EP2451602A1
EP2451602A1 EP10730033A EP10730033A EP2451602A1 EP 2451602 A1 EP2451602 A1 EP 2451602A1 EP 10730033 A EP10730033 A EP 10730033A EP 10730033 A EP10730033 A EP 10730033A EP 2451602 A1 EP2451602 A1 EP 2451602A1
Authority
EP
European Patent Office
Prior art keywords
cutting
cutting edge
face
edge regions
milling cutter
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP10730033A
Other languages
German (de)
English (en)
Inventor
Peter Kirchberger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Boehlerit GmbH and Co KG
Original Assignee
Boehlerit GmbH and Co KG
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 Boehlerit GmbH and Co KG filed Critical Boehlerit GmbH and Co KG
Publication of EP2451602A1 publication Critical patent/EP2451602A1/fr
Withdrawn legal-status Critical Current

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
    • B23C5/109—Shank-type cutters, i.e. with an integral shaft with removable cutting inserts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C3/00—Milling particular work; Special milling operations; Machines therefor
    • B23C3/06—Milling crankshafts
    • 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
    • B23C5/06—Face-milling cutters, i.e. having only or primarily a substantially flat cutting surface
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C5/00—Milling-cutters
    • B23C5/16—Milling-cutters characterised by physical features other than shape
    • B23C5/20—Milling-cutters characterised by physical features other than shape with removable cutter bits or teeth or cutting inserts
    • B23C5/202—Plate-like cutting inserts with special form
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C2200/00—Details of milling cutting inserts
    • B23C2200/12—Side or flank surfaces
    • B23C2200/128—Side or flank surfaces with one or more grooves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C2200/00—Details of milling cutting inserts
    • B23C2200/16—Supporting or bottom surfaces
    • B23C2200/165—Supporting or bottom surfaces with one or more grooves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C2200/00—Details of milling cutting inserts
    • B23C2200/20—Top or side views of the cutting edge
    • B23C2200/206—Cutting edges having a wave-form
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C2200/00—Details of milling cutting inserts
    • B23C2200/36—Other features of the milling insert not covered by B23C2200/04 - B23C2200/32
    • B23C2200/367—Mounted tangentially, i.e. where the rake face is not the face with largest area
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/17—Crankshaft making apparatus
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T407/00—Cutters, for shaping
    • Y10T407/19—Rotary cutting tool
    • Y10T407/1906—Rotary cutting tool including holder [i.e., head] having seat for inserted tool
    • Y10T407/1908—Face or end mill
    • Y10T407/1924—Specified tool shape
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T409/00—Gear cutting, milling, or planing
    • Y10T409/30—Milling
    • Y10T409/303752—Process
    • Y10T409/303808—Process including infeeding

Definitions

  • the invention relates to a face milling cutter for machining a bearing area of a crankshaft, in particular a crankshaft of a ship engine, having a base body with an end face and a plurality of cutting plates designed for a rotary milling, which are arranged on or in the end face.
  • the invention relates to a use of a cutting insert for a face milling cutter for machining a bearing area of a crankshaft, in particular a crankshaft of a marine engine.
  • the invention relates to a method for processing a bearing area of a crankshaft, in particular a crankshaft of a marine engine, wherein a
  • End mill is employed on a clamped and in-rotation crankshaft to edit by a rotary milling a storage area of a given dimension.
  • crankshafts of several meters in length can be made from freeform forgings, with up to 50% of a mass of forgings or billets removed by machining to create large crankshafts with a desired contour.
  • a so-called Einzelhubschmieden, z. B. after Tadeusz Rut used to create blanks of large crankshaft for marine engines, the correspondingly created blanks are also made with oversize and require a machining.
  • the object of the invention is to provide an end mill of the type mentioned, in which the above disadvantages are at least partially eliminated.
  • Another object of the invention is to provide a use of a cutting insert.
  • the object to provide a face milling cutter of the type mentioned, in which the disadvantages of the prior art are at least partially eliminated, is achieved in a generic face milling cutter, when the cutting plates each have at least one cutting edge, which comprises regions alternately cutting active and non-cutting active areas.
  • the cutting plates have cutting teeth, wherein the cutting teeth with first
  • Cutting edge regions and second cutting edge regions may be formed, which are in particular part of wavy cutting edge profiles of the inserts.
  • the cutting plates are arranged in plan view of the end face so that the cutting edge courses of the cutting plates with the exception of an optionally provided in the end face opening cover substantially an entire radius of the end surface overlapping.
  • At least one finishing plate may be provided to edit a bearing area of a crankshaft even finer, simultaneously with a rotary milling.
  • Cutting edge areas may be formed arbitrarily.
  • the first cutting edge regions as well as the second cutting edge regions may be arcuate, the radii being different.
  • the cutting plates are formed in the frontal view with horizontal first cutting edge regions, in particular in obliquely adjoining the second straight
  • first cutting edge regions result in a high quality of a machined surface.
  • the second cutting edge regions at an angle of about 30 ° to 60 °, preferably about 40 ° to 50 °, to the first
  • the first cutting edge regions of the cutting plates are arranged with positive cutting geometry on or in the end face with respect to a plane parallel to the end face imaginary reference plane, which basically corresponds to a plane in which a bearing area of a crankshaft is processed in turn, in particular with regard to advantageous conditions for cutting or small cutting forces is low.
  • the inserts used in a face milling cutter according to the invention can in principle be formed with any geometric shape. However, it is particularly preferred that the cutting plates are rhombic in plan view. In this case it is avoided that the cutting teeth, which can extend over an entire length of the cutting plates depending on the plate formation, become larger
  • the inserts used in an end mill according to the invention are preferably indexable inserts, it can be provided that the inserts are each formed with side surfaces which are inclined to a substantially horizontal top or bottom of the insert, wherein the cutting teeth with defining side surfaces from top to bottom jump back, whereas the other side surfaces project from the top to the bottom.
  • the cutting plates which are advantageously arranged with positive cutting geometry, each have sufficient clearance angles for favorable
  • the mentioned positive cutting geometry here refers to geometrical conditions on the inserts in the attached state.
  • Spanqueritese as viewed in the direction of a radius of the end face, virtually overlap, so that a substantially smooth surface is obtained in the processing of a bearing area of a crankshaft.
  • one or two larger size plates with straight cutting edges can additionally be arranged on or in the end face to form a
  • the sizing plates are arranged so that they together cover a radius of the end face, again with the exception of an opening in the end face.
  • the further object of the invention is achieved by the use of a cutting insert for a face milling cutter for machining a bearing area of a crankshaft, in particular a crankshaft of a marine engine, wherein the cutting plate has at least one cutting edge, which comprises regions alternately cutting active and non-cutting active areas.
  • the cutting plate has cutting teeth, advantageously with first cutting edge regions and second cutting edge regions, which are in particular part of a wave-shaped cutting edge profile of the cutting insert.
  • the cutting plate is formed in the frontal view with horizontal first cutting edge areas, which in particular in oblique
  • the second cutting edge regions may be at an angle of approximately 30 ° to 60 °, preferably approximately 40 ° to 50 °, to the first cutting edge regions
  • the first cutting edge regions can be bent into the second
  • Cutting edge areas go over, which is preferred in terms of stability of the cutting plate or a latching of cutouts of the cutting plate.
  • the cutting plate is preferably rhombic in plan view, wherein the
  • Cutting plate is formed with side surfaces which are inclined relative to a substantially horizontal top or bottom of the insert, wherein the
  • Cutting teeth with defining side surfaces spring back from the top to the bottom, whereas the other side surfaces protrude from the top to the bottom.
  • Such a design of the cutting plate results in the use of the same in a face milling cutter to small cutting forces or favorable cutting conditions.
  • the cutting plate is advantageously designed as an indexable insert, wherein in plan view a cutting edge profile at the top of the cutting insert a
  • Cutting edge profile at the bottom of the cutting plate approximately at an angle of 75 ° to 87 ° crosses.
  • a particular advantage of a method according to the invention is that the bearing area of the crankshaft during a single rotation of the same around its longitudinal axis can be finished by rotary milling, so that the
  • 1 shows a face milling cutter in plan view.
  • Fig. 4 is a perspective view of a cutting plate
  • FIG. 5 shows an end view of an insert according to FIG. 4
  • Fig. 6 is a plan view of an insert according to Fig. 4;
  • FIG. 7 is a perspective view of a machining of a crankshaft by means of an end mill
  • Fig. 8 is an end view of an end mill during processing of a
  • Fig. 9 is a schematic representation concerning a spiral arrangement of individual
  • Fig. 10 chip cross-sections, in a processing of a storage area of a
  • Fig. 11 chip cross-sections, in a processing of a storage area of a
  • FIG. 1 to 3 an inventive end mill 1 is shown in plan view and perspective views, in Fig. 3, only a portion of the end mill 1 is shown.
  • the end mill 1 comprises a base body 2, which is formed substantially cylindrical.
  • the main body 2 can, as can be seen in FIG. 2, be designed as an insert which is arranged on a shank of the end mill 1, it being possible to provide damping means in the context of the connection of the shank to the main body 2.
  • an opening 14 is preferably provided, through which a screw or other fastening means for the purpose of attachment of the base body 2 on the shaft can be passed.
  • the main body 2 has an end face 3, which is substantially flat, unless plate seats and chip recesses are provided. On or in the end face 3, several types of inserts 4, 9, 10 are arranged.
  • cutting inserts 4 designed for rotary milling are mounted on or in the end face 3 of the base body 2.
  • the cutting plates 4 each have a central opening through which a screw 13 or a fastening bolt can be guided, with which the cutting plates 4 are fixed on or in the end face 3 of the main body 2.
  • two sizing plates 10 are arranged on or in the end face 3. Furthermore, as can be seen for example in FIG.
  • Radial cutting plates 9 may be arranged on the outside of the base body 2, which serve a processing of a radius, if necessary.
  • the end mill 1 rotates according to FIG. 1 in the direction R.
  • the cutting plates 4 are formed as shown in Fig. 4 to 6.
  • Each cutting plate 4 consists of an optionally coated hard metal, which is formed into a rhombic cutting plate 4 in plan view.
  • the cutting plate 4 has a horizontal or substantially horizontal upper side 15 and a similar underside 16, which are connected to each other by flat side surfaces 17, 18.
  • the side surfaces 17 project in plan view of the cutting plate 4 to the bottom 16 of the cutting plate 4, whereas the side surfaces 18, which connect as the side surfaces 17, the top 15 to the bottom 16, are formed to spring back.
  • the cutting plate 4 has the already mentioned central opening, through which one of the screws 13 or another fastening means can be guided in order to fasten the cutting plate 4, in particular on a face milling cutter 1.
  • the cutting plate 4 has at the top 15 as well as the bottom 16 on a cutting edge 8, which passes through the side surfaces 18th is defined.
  • the cutting edge course 8, which is clearly visible in the frontal view according to FIG. 5, comprises cutting teeth 5, each having cutting-active first cutting edge regions 6 and second cutting edge regions 7 and recessed intermediate edge portions 19, which are not cutting active.
  • the cutting teeth 5 are formed with respect to the entire upper side 15 or bottom 16 of the cutting plate 4 so that a groove-shaped profile at the top 15 and bottom 16 is given, although this is not necessarily so.
  • An angle which is enclosed between the upper side 15 and one of the side surfaces 18 of the cutting plate 4 is typically about 5 ° to 15 °, in particular 7 ° to 13 °, so that a favorable clearance angle for the first cutting edge regions 6 is given.
  • An angle ⁇ between side surfaces 17 and side surfaces 18 is preferably about 75 ° to 87 °, in particular 80 ° to 86 °.
  • Bottom 16 designed so that the apparent grooves and ribs intersect, if one thinks of them superimposed.
  • An intersection angle corresponds to the aforementioned angle ⁇ between the side surfaces 17 and the side surfaces 18.
  • the cutting plates 4 are arranged on or in the end face 3 of the main body 2 of the end mill 1, as can be seen in Fig. 1, in the radial direction, wherein the individual inserts 4 in pairs side by side and radially offset from each other with the center of the opening 14 aligned cutting edge curves 8 are arranged so that ultimately in the radial direction an entire radius of the end face 3 is covered by the cutting plates 4, when the face milling cutter 1 or base body 2 rotates in use.
  • This is the case, for example, as can be seen with reference to FIGS. 7 and 8, during the machining of a bearing area 12 of a crankshaft 11 or a blank thereof. In this case, the crankshaft 11 is rotated about a longitudinal axis thereof, while the
  • End mill 1 or body 2 also rotates and simultaneously over the zu
  • Cutting inserts 4 lie on a spiral 20, which from an outside of the
  • Base body 2 extends to a center thereof. This situation is shown in Fig. 9, wherein the sake of clarity, the base body 2 hidden and the coil 20 is only partially shown. By this helical arrangement is achieved that the individual cutting teeth 5 during rotation of the end mill 1 in
  • Opening 14 cover a radius of the end face 3, if this thought
  • Cutting forces at a chip cross section of FIG. 10 are substantially smaller than in a chip cross section of FIG. 11, thus generally more favorable

Landscapes

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

Abstract

L'invention concerne une fraise en bout (1) pour usiner une zone de palier d'un vilebrequin, notamment d'un vilebrequin d'un moteur de bateau, comprenant un corps de base (2) muni d'une surface frontale (3) et de plusieurs plaquettes de coupe (4) prévues pour un fraisage rotatif qui sont disposées sur ou dans la surface frontale (3). Pour obtenir des conditions favorables d'enlèvement de copeaux avec des petites forces de coupe et donc une sollicitation minime de l'outil, les plaquettes de coupe (4) présentent respectivement, selon l'invention, au moins une arête de coupe qui comprend par endroit en alternance des zones de coupe active et des zones de coupe inactive.
EP10730033A 2009-07-08 2010-06-21 Fraise en bout Withdrawn EP2451602A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT0106709A AT508492A1 (de) 2009-07-08 2009-07-08 Stirnfräser
PCT/AT2010/000226 WO2011003120A1 (fr) 2009-07-08 2010-06-21 Fraise en bout

Publications (1)

Publication Number Publication Date
EP2451602A1 true EP2451602A1 (fr) 2012-05-16

Family

ID=42630617

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10730033A Withdrawn EP2451602A1 (fr) 2009-07-08 2010-06-21 Fraise en bout

Country Status (6)

Country Link
US (1) US20120093594A1 (fr)
EP (1) EP2451602A1 (fr)
JP (1) JP2012528727A (fr)
KR (1) KR20120018305A (fr)
AT (1) AT508492A1 (fr)
WO (1) WO2011003120A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012009097B4 (de) * 2012-05-03 2023-11-02 Kennametal Inc. Fräswerkzeug zur Bearbeitung von gehärteten Kurbel- oder Nockenwellen
DE102012021275B4 (de) * 2012-10-29 2014-05-15 Audi Ag Verfahren zum Planbearbeiten von Oberflächen an Werkstücken
DE102013014761B4 (de) 2013-09-05 2017-06-22 Audi Ag Stirnfräswerkzeug
US9259789B2 (en) * 2013-10-31 2016-02-16 Iscar, Ltd. Indexable asymmetric cutting insert and cutting tool therefor
DE102014002062A1 (de) 2014-02-18 2015-08-20 Peter Schmid Wendeplattenfräser
KR102006376B1 (ko) * 2015-09-25 2019-10-01 주식회사 엘지화학 절삭 바이트, 및 이를 포함하는 절삭 장치
US11529691B2 (en) * 2019-12-02 2022-12-20 Kennametal Inc. Rotary cutting tool with hybrid cutting insert design

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US2318262A (en) * 1941-11-12 1943-05-04 Century Motors Corp Apparatus for machining serrations in metallic bodies
FR2183362A5 (fr) * 1972-05-04 1973-12-14 Giraud Pierre
JPS49106980U (fr) * 1974-12-29 1975-09-12
CA1026215A (fr) * 1975-01-08 1978-02-14 Morimasa Hanaya Materiel pour reduire les grumes en copeaux
US4248553A (en) * 1978-09-29 1981-02-03 Fansteel Inc. Cutting insert configuration
JPS5938977Y2 (ja) * 1979-06-06 1984-10-30 住友電気工業株式会社 波形切刃を有するスロ−アウエイチツプ
US5158401A (en) * 1988-03-21 1992-10-27 Gte Valenite Corporation Indexable insert for roughing and finishing
AU7778791A (en) * 1990-04-28 1991-11-27 Sandvik Ab Cutting insert for tools
JPH06304806A (ja) * 1993-04-22 1994-11-01 Kanto Auto Works Ltd 縦送り加工用カッター
CA2180547C (fr) * 1994-01-14 2005-03-15 Ingemar Hessman Plaquette indexable pour finissage a la fraise et fraise appropriee
DE19516946A1 (de) * 1995-05-11 1996-11-14 Widia Gmbh Fräswerkzeug
JPH0985515A (ja) * 1995-09-28 1997-03-31 Toshiba Tungaloy Co Ltd エンドミル
JP2002233910A (ja) * 2001-02-02 2002-08-20 Osg Corp 回転切削工具
JP2002254233A (ja) * 2001-02-28 2002-09-10 Toshiba Tungaloy Co Ltd 正面フライス用のサライ刃チップ
EP1252955A1 (fr) * 2001-04-26 2002-10-30 Mitsubishi Materials Corporation Plaquette de coupe indexable
EP1907156B1 (fr) * 2005-07-22 2015-07-15 Gebr. Heller Maschinenfabrik GmbH Procede d'usinage de precision d'arbres-manivelles et centre d'usinage correspondant

Non-Patent Citations (1)

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Title
See references of WO2011003120A1 *

Also Published As

Publication number Publication date
KR20120018305A (ko) 2012-03-02
WO2011003120A1 (fr) 2011-01-13
AT508492A1 (de) 2011-01-15
US20120093594A1 (en) 2012-04-19
JP2012528727A (ja) 2012-11-15

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