EP2427292A1 - Fräser-schneideinsatz - Google Patents

Fräser-schneideinsatz

Info

Publication number
EP2427292A1
EP2427292A1 EP10711149A EP10711149A EP2427292A1 EP 2427292 A1 EP2427292 A1 EP 2427292A1 EP 10711149 A EP10711149 A EP 10711149A EP 10711149 A EP10711149 A EP 10711149A EP 2427292 A1 EP2427292 A1 EP 2427292A1
Authority
EP
European Patent Office
Prior art keywords
cutting
cutting edge
cutter
insert according
cutting insert
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Withdrawn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
EP10711149A
Other languages
German (de)
English (en)
French (fr)
Inventor
Jürgen ZASTROZYNSKI
Carsten Schwaner
Andreas Wessel
Martin Hausmann
Richard Fischer
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.)
Kennametal Inc
Original Assignee
Kennametal Inc
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 Kennametal Inc filed Critical Kennametal Inc
Publication of EP2427292A1 publication Critical patent/EP2427292A1/de
Withdrawn legal-status Critical Current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
    • B23C5/06—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
    • B23B—TURNING; BORING
    • B23B27/00—Tools for turning or boring machines; Tools of a similar kind in general; Accessories therefor
    • B23B27/14—Cutting tools of which the bits or tips or cutting inserts are of special material
    • B23B27/16—Cutting tools of which the bits or tips or cutting inserts are of special material with exchangeable cutting bits or cutting inserts, e.g. able to be clamped
    • 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
    • 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
    • B23C2200/20—Top or side views of the cutting edge
    • B23C2200/208—Wiper, i.e. an auxiliary cutting edge to improve surface finish
    • 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
    • B23C2210/0421—Cutting angles negative
    • B23C2210/0435—Cutting angles negative radial rake angle
    • 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
    • B23C2210/0442—Cutting angles positive
    • B23C2210/045—Cutting angles positive axial rake angle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C2210/00—Details of milling cutters
    • B23C2210/20—Number of cutting edges
    • B23C2210/205—Number of cutting edges six
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C2210/00—Details of milling cutters
    • B23C2210/20—Number of cutting edges
    • B23C2210/207—Number of cutting edges eight
    • 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
    • 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
    • Y10T407/00—Cutters, for shaping
    • Y10T407/23—Cutters, for shaping including tool having plural alternatively usable cutting edges
    • 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
    • Y10T407/24—Cutters, for shaping with chip breaker, guide or deflector

Definitions

  • the invention relates to a cutter cutting insert with a square or triangular rake face, which is limited in a plan view by a circumferential cutting edge with linearly extending cutting edges and curved cutting corners.
  • shoulder milling of 90 ° shoulders milling cutters are required, which are equipped with cutting inserts, which have a main cutting edge and a cutting edge (for smoothing the cut surface).
  • the clamped cutting inserts protrude both beyond the face of the rotatable tool holder and laterally to allow for both the vertical wall portions and the finish of the cut sole wall.
  • the achievable depth of cut a p is limited by the length of the main cutting edge. This becomes particularly clear in the case of the mostly diamond-shaped cutting inserts, in which only two opposing cutting corners with adjacent main and face cutting edges can be used on the rake surface.
  • This object is achieved by a cutting insert according to claim 1, which has the following features.
  • the cutter cutting insert has a square or triangular rake face, viewed in plan view, bounded by a circumferential cutting edge with linearly extending cutting edges and curved cutting corners.
  • Each of the cutting edges has a sloping region inclined towards a cutting corner which extends beyond the point of tangency determined by the point where the linear cutting edge merges into the curved cutting corner. Following this, the cutting edge rises even before the point bisected by a cutting edge angle, with this rising area extending to a cutting edge maximum lying beyond the cutting edge on the adjacent linear cutting edge in a plan view, from where further along the cutting edge again sloping inclined, so that overall results in a rotationally symmetrical shape of the cutting insert with the same design cutting edges. This is in a square cutting insert a 90 ° rotationally symmetrical shape with 4 equally long cutting edges and in a triangular cutting insert a 120 ° rotationally symmetrical shape with 3 equally long cutting edges.
  • each of the 4 cutting edges can be used as a plan and main cutting edge, and that larger cutting depths a p are possible due to the special contour of the cutting edge profile compared with the milling cutter cutting inserts known from the prior art.
  • the cutter consumes less power during cutting than the cutter with conventional cutting inserts.
  • the cutting edge minimum and the cutting edge maximum following in the further cutting edge course lie within the same cutting corner. This means that the height compensation between the cutting edge minimum and the cutting edge maximum in the area of the cutting corner is completed.
  • an identically designed rake surface with corresponding cutting edges and cutting corners of the type described above is preferably provided on opposite sides, which are connected to each other by circumferential free surfaces or in which forms the free surfaces with the two opposing rake faces each cutting edges.
  • the cutting insert is symmetrical about a median plane disposed between the rake surfaces. The advantage of this cutting insert is that in a square cutting insert 8 cutting edges and in a triangular cutting insert 6 cutting edges are successively usable.
  • a middle plane plateau preferably extends around a middle attachment hole.
  • planar plateau regions arranged axially and rotationally symmetrically around the fastening hole can extend as bearing surfaces.
  • the tool holder (milling cutter main body) has correspondingly formed bearing surfaces and in the rear area further recesses which allow a non-contact recording of the over the bearing areas projecting cutting edge and cutting edge areas.
  • the lowest cutting edge point lies below the support area or the support areas and / or the cutting edge maximum lies above the plane determined by the support area or the support areas.
  • the rake face portions adjacent the cutting edges are arranged at a positive rake angle.
  • the cutting edge radius is according to a particular embodiment of the invention between 0.8 mm and 1, 6 mm, preferably between 0.8 mm to 1, 2 mm.
  • the sloping cutting edge region is arranged at an inclination angle of 10 ° to 20 ° (relative to the support surface).
  • the area over which the cutting edge rises is (as viewed in a plan view) about 1/6 to 1/7 as long as the distance between two cutting corners.
  • the rising portion of the cutting edge in the lower part is concave and convex in the upper part.
  • the free surfaces are preferably flat or slightly concave in order to form a clearance angle> 0 ° can.
  • the cutting edge maxima project beyond the chip surface plateau (on the same side) by 1.5 mm to 2 mm; whereas the cutting edge minimum is 0.5 mm to 0.8 mm below this rake face plateau (on the same side).
  • FIG. 1 is a plan view of a cutting insert according to the invention
  • FIG. 2 is a side view of the cutting insert of FIG. 1,
  • FIG. 3 is a perspective view of the cutting insert of FIG. 1 or 2
  • Fig. 4 is a perspective view of a corner cutter
  • Fig. 5 is a side view of this cutter.
  • the cutting insert according to Figures 1 to 3 has four mutually perpendicular cutting edges 10 and four cutting corners 11, which connect the cutting edges 10 together and are round; for example, over a radius of 1, 2 mm.
  • Four flat bearing areas 12 extend around a central fastening hole 13 for receiving a clamping screw.
  • the present cutting insert is designed as an indexable insert which has two on opposite sides. ing sides arranged clamping surfaces, which are limited by each identically formed cutting edges and cutting corners. Since the cutting edges project beyond the planes in which the support regions 12 lie, a corresponding undercut space must be provided next to the support surface in the tool holder, which will be discussed later with reference to FIGS. 4 and 5, due to which it is possible to insert the cutting inserts clamp, without that the currently unused cutting edges are exposed in the tool holder a clamping pressure.
  • the four plateau-shaped bearing areas 12 consist of similarly formed area pieces, which are delimited on two sides by boundary lines which are at right angles to one another and, moreover, essentially by a curved line. Between the four bearing areas 12, approximately groove-shaped short recesses, as can be seen in FIG. 1, can be created.
  • each of the cutting edges has a sloping region 10a inclined towards a cutting corner 11, which extends beyond the point of tangency 14 in the direction of the line of intersection with an angle bisector 15.
  • a point 16 forms the cutting edge minimum, which lies between said points 14 and the intersection of the cutting corner with the bisecting line 15.
  • the cutting edge 10b rises to a maximum 17, wherein the cutting edge first has a concave and then subsequent to the cutting edge maximum 17 has a convex profile.
  • the cutting edge maximum 17 is well above the plane determined by the support areas 12, whereas the point 16 is below this level.
  • each of the cutting edge regions 10a, 10b can thus be used in successive cutting operations after turning the indexable insert and relocking as the main cutting edge and as the cutting edge.
  • the cutting insert has, subsequent to the cutting edge 10a, a rake face region 18 which can be inclined at a positive rake angle of 10 ° to 30 °, preferably 20 °.
  • the chip area 18 may also be slightly convex.
  • the rake face has a rounded ridge 19, which has an approximately triangular rake face area 20 and, behind it, at least lateral offset, an acute-angled rake face area 21 with considerable larger rake angles.
  • the rake surface region 22 is convex and strongly sloping.
  • Flat rake face areas under a small angle of inclination join as rake faces 23.
  • a tool carrier 25 serves to receive a plurality of cutting inserts 26 according to FIGS. 1 to 3.
  • the tool carrier 25 has respective pocket-shaped receptacles for receiving the cutting inserts, which are suitable for securely holding the cutting insert formed with a double-sided rake face the plateau surfaces 12 serve as bearing surfaces, which are tensioned against a correspondingly formed contact surface in the tool holder seat.
  • As clamping means is a fastening screw which is inserted over the mounting hole and screwed to the tool holder 25.
  • the tool holder has six cutting inserts, the two of which abut cutting edges and the front side, so that the cutter is suitable for forming a 90 ° shoulder.
  • Denoted at 27 is an (internal) coolant supply.
  • Cutting edge formations according to the invention can also be realized in cutting inserts of this type which, viewed in a plan view, have a triangular rake surface configuration which is delimited by 3 equally long cutting edges.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Milling Processes (AREA)
EP10711149A 2009-05-08 2010-03-24 Fräser-schneideinsatz Withdrawn EP2427292A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009020373A DE102009020373A1 (de) 2009-05-08 2009-05-08 Fräser-Schneideinsatz
PCT/EP2010/001829 WO2010127743A1 (de) 2009-05-08 2010-03-24 Fräser-schneideinsatz

Publications (1)

Publication Number Publication Date
EP2427292A1 true EP2427292A1 (de) 2012-03-14

Family

ID=42288942

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10711149A Withdrawn EP2427292A1 (de) 2009-05-08 2010-03-24 Fräser-schneideinsatz

Country Status (8)

Country Link
US (1) US8641331B2 (ja)
EP (1) EP2427292A1 (ja)
JP (1) JP5568631B2 (ja)
KR (1) KR20120027223A (ja)
CN (1) CN102405119A (ja)
BR (1) BRPI1014440A2 (ja)
DE (1) DE102009020373A1 (ja)
WO (1) WO2010127743A1 (ja)

Families Citing this family (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102481641B (zh) * 2010-01-29 2013-11-06 京瓷株式会社 切削镶刀及切削工具、以及使用该切削工具的切削加工物的制造方法
JP5589244B2 (ja) * 2010-10-06 2014-09-17 大昭和精機株式会社 インサート
DE102011105978B4 (de) * 2011-06-29 2022-06-23 Kennametal Inc. Wendeschneidplatte sowie Plan-Eckfräser mit Wendeschneidplatte
EP2559509B1 (en) * 2011-08-16 2014-12-31 Seco Tools Ab Indexable, double-sided cutting insert and cutting tool including such an insert
IL214782A (en) * 2011-08-22 2016-02-29 Iscar Ltd Cutting and milling
AT12630U1 (de) 2011-08-26 2012-09-15 Ceratizit Austria Gmbh Doppelseitiger schneideinsatz zum fräsen
JP5906976B2 (ja) 2011-10-04 2016-04-20 三菱マテリアル株式会社 切削インサートおよび刃先交換式切削工具
JP5938868B2 (ja) * 2011-10-04 2016-06-22 三菱マテリアル株式会社 切削インサートおよび刃先交換式切削工具
EP2596889B1 (en) * 2011-11-23 2017-04-26 Sandvik Intellectual Property AB A cutting insert and a milling tool
SE536343C2 (sv) 2012-01-16 2013-09-03 Sandvik Intellectual Property Fräsverktyg jämte dubbelsidigt indexerbart frässkär
EP2818269B1 (en) * 2012-02-20 2016-05-25 Tungaloy Corporation Cutting insert and cutting tool with replaceable cutting edge
US8573905B2 (en) 2012-03-22 2013-11-05 Iscar, Ltd. Triangular cutting insert and cutting tool
US8708616B2 (en) * 2012-07-06 2014-04-29 Iscar, Ltd. Rotary cutting tool and reversible cutting insert therefor
CN102744431B (zh) * 2012-07-24 2014-01-22 哈尔滨理工大学 一种极端超重载条件下握型车铣复合专用刀片
JP5401732B1 (ja) * 2012-10-23 2014-01-29 住友電工ハードメタル株式会社 フライス加工用刃先交換式切削インサート
WO2014208513A1 (ja) 2013-06-27 2014-12-31 京セラ株式会社 切削インサート、切削工具および切削加工物の製造方法
US20150117969A1 (en) * 2013-10-29 2015-04-30 Kennametal Inc. Cutting insert and shim for heavy machining operations
AT14072U1 (de) * 2014-02-04 2015-04-15 Ceratizit Luxembourg S R L Doppelseitiger Frässchneideinsatz und Fräswerkzeug
US10315258B2 (en) * 2014-02-26 2019-06-11 Tungaloy Corporation Cutting insert and cutting tool
US9623495B2 (en) * 2014-10-06 2017-04-18 Kennametal Inc. Cutting insert with asymmetric cutting edge
US9981323B2 (en) 2015-07-16 2018-05-29 Kennametal Inc. Double-sided tangential cutting insert and cutting tool system using the same
USD777230S1 (en) 2015-07-16 2017-01-24 Kennametal Inc Double-sided tangential cutting insert
USD778330S1 (en) 2015-07-16 2017-02-07 Kennametal Inc. Double-sided tangential cutting insert
DE112015006941T5 (de) * 2015-09-25 2018-06-14 Mitsubishi Hitachi Tool Engineering, Ltd. Schneidplatte und Wende-Drehschneidwerkzeug
EP3260225B1 (en) * 2016-06-20 2022-11-30 Sandvik Intellectual Property AB Turning insert
EP3476508A1 (en) * 2017-10-31 2019-05-01 Sandvik Intellectual Property AB Turning insert
US11583942B2 (en) 2020-10-19 2023-02-21 Iscar, Ltd. Reversible square-shaped cutting insert and rotary cutting tool

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See references of WO2010127743A1 *

Also Published As

Publication number Publication date
JP5568631B2 (ja) 2014-08-06
US8641331B2 (en) 2014-02-04
JP2012525984A (ja) 2012-10-25
WO2010127743A1 (de) 2010-11-11
KR20120027223A (ko) 2012-03-21
US20120057943A1 (en) 2012-03-08
DE102009020373A1 (de) 2010-11-11
CN102405119A (zh) 2012-04-04
BRPI1014440A2 (pt) 2016-04-05

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