EP1912757A1 - Plaquette de coupe - Google Patents

Plaquette de coupe

Info

Publication number
EP1912757A1
EP1912757A1 EP06761802A EP06761802A EP1912757A1 EP 1912757 A1 EP1912757 A1 EP 1912757A1 EP 06761802 A EP06761802 A EP 06761802A EP 06761802 A EP06761802 A EP 06761802A EP 1912757 A1 EP1912757 A1 EP 1912757A1
Authority
EP
European Patent Office
Prior art keywords
cutting
cutting insert
insert according
cutting edge
angle
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Withdrawn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
EP06761802A
Other languages
German (de)
English (en)
Inventor
Markus Heinloth
Jürgen ZASTROZYNSKI
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 Widia Produktions GmbH and Co KG
Original Assignee
Kennametal Widia Produktions 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 Kennametal Widia Produktions GmbH and Co KG filed Critical Kennametal Widia Produktions GmbH and Co KG
Publication of EP1912757A1 publication Critical patent/EP1912757A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • B23C5/16—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
    • B23B—TURNING; BORING
    • B23B2200/00—Details of cutting inserts
    • B23B2200/36—Other features of cutting inserts not covered by B23B2200/04 - B23B2200/32
    • B23B2200/3645—Lands, i.e. the outer peripheral section of the rake face
    • B23B2200/3663—Lands, i.e. the outer peripheral section of the rake face having negative cutting angles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C2200/00—Details of milling cutting inserts
    • B23C2200/08—Rake or top surfaces
    • B23C2200/085—Rake or top surfaces discontinuous
    • 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
    • B23C2200/203—Curved cutting edges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C2200/00—Details of milling cutting inserts
    • B23C2200/28—Angles
    • B23C2200/286—Positive cutting angles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C2215/00—Details of workpieces
    • B23C2215/20—Crankshafts
    • 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
    • Y10T407/1934—Rotary cutting tool including holder [i.e., head] having seat for inserted tool with separate means to fasten tool to holder
    • Y10T407/1936—Apertured 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
    • Y10T407/23—Cutters, for shaping including tool having plural alternatively usable cutting edges
    • Y10T407/235—Cutters, for shaping including tool having plural alternatively usable cutting edges with integral chip breaker, guide or deflector
    • 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
    • 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
    • Y10T407/245—Cutters, for shaping with chip breaker, guide or deflector comprising concave surface in cutting face of tool

Definitions

  • the invention relates to a cutting insert, in particular for crankshaft machining, with two mutually parallel planar base surfaces, each penetrated by a bore for receiving a clamping screw and merge at their shorter edges in rounded end faces, which are each bounded laterally by cutting edges.
  • Such cutting inserts are used for example in the external milling of crankshafts, in particular for the processing of the undercut on the pin.
  • EP 0 830 228 B1 describes a disk-shaped external milling cutter which is driven in such a way that the machining is carried out at cutting speeds of more than 160 m / min. For this purpose, both the crankshaft and the external milling cutter are rotated.
  • tangentially clamped cutting inserts are used, whereas for the processing of the cheeks, an oil collar and a undercut radially clamped cutting inserts are used.
  • Such cutting inserts have the above-mentioned construction, each with rounded cutting edges, which have an at least substantially uniform curvature over an angular extent of about 135 ° and then pass on to a linear section before the cutting edge merges via a convex curvature in the opposite base.
  • rotary-Räum- or rotary-rotary-Räum-method For machining crankshafts and turning tools which are used in so-called rotary-Räum- or rotary-rotary-Räum-method.
  • rotary clearing a linear rotary broaching tool is delivered in the radial direction to the rotating tool to be machined.
  • a plurality of successive cutting inserts are arranged on a pitch circle circumference of a disc-shaped tool carrier, which gradually increase gradually along a first portion of the disc circumference.
  • This tool is along a partial arc in the radial direction on the rotating workpiece pivoted, as described in principle in EP O 313 644 B1 or EP 0 286 771 A1.
  • two geometrically different types of cutting insert are used for the journal processing and the production of the undercut.
  • the so-called internal milling is also known, which also works with a disc-shaped milling tool, but with the proviso that the cutting inserts are arranged on the inner shell side of an annular disc.
  • the tool costs consist of several components. These include, in particular, the tool costs, which are determined not only by the pure production costs but also by the service lives. Furthermore, the processing times and the costs for tool conversion are included. So-called indexable inserts have several usable cutting edges, but their number is structurally limited. Thus, the number of usable cutting edges in an aforementioned cutting insert is limited to four.
  • a cutting insert according to claim 1 characterized in that at least one pair of the cutting edges is step-shaped and has two convex and an intermediate concave portion, wherein the outer convex portion extends over an angular extent of 180 °.
  • Such a cutting edge shape can be stepped contours such as an oil collar of a crankshaft cut, at the same time a cheek, the oil collar and the journal bearing corner or a undercut can be formed. Further developments of the invention are described in the subclaims.
  • two pairs of the cutting edges are preferably formed in steps, so that the cutting insert is rotationally symmetrical about a transverse axis when rotated by 180 °. Overall, this results in four congruent cutting edges, which can be used successively.
  • a chamfer is provided along the cutting edge, which is preferably arranged at a (negative) chamfer angle of -15 ° and / or with a chamfer width of 0.1 to 0.2 mm.
  • the rake angle used in particular the rake angle adjoining the chamfer, is 0 ° to 20 °, preferably it is selected to be positive at 10 °.
  • the radius of curvature of the cutting edge can be chosen so that this cutting edge in an operation a step-shaped contour is cut in the desired final dimensions.
  • this is the radius of curvature in the concave portion of the cutting edge with 1, 5 + 0.1 mm and in the convex portion of the cutting edge on one side with 1, 5 ⁇ 0.1 mm and on the other side with 1, 4 + 0.1 mm selected.
  • other cutting edge radii of curvature can be used.
  • a cutting insert configuration may be selected in which the common tangent to the convex portions forms an angle of 35 ° ⁇ 5 ° with the base.
  • the cutting edge region reaching over 180 ° passes over a linear cutting edge piece into the adjacent base surface, this cutting edge piece forming an angle of ⁇ 5 ° with the base surface.
  • the convex and the concave cutting edge portion inclined by an angle of up to 20 °, preferably of 10 ° to the longitudinal central axis of the cutting insert.
  • FIG. 1 is a plan view of a cutting insert according to the invention
  • Fig. 3 is an enlarged view of a cutting edge contour
  • Fig. 4 is a partial sectional view in the region of a cutting edge.
  • the cutting insert shown in the figures has two mutually parallel planar base surfaces 10, 11, which are penetrated by a through hole 12. This bore serves to receive a clamping screw, by means of which the cutting insert is attached radially or laterally to a side milling cutter.
  • the base surfaces 10, 11 go over at their shorter edges in rounded end faces, which are bounded laterally by cutting edges.
  • the cutting edges are step-shaped and consist of two convex cutting edge sections 13 and 14 and an intermediate concave cutting edge section 15.
  • the radii R 1 and R 3 for the convex cutting edge sections can be the same size, z_ B. 1, 5 mm or different. The same applies to the radius R 2 of the concave cutting edge section.
  • the cutting insert has a chamfer 16 which extends along the cutting edge portions 13-15. This chamfer is inclined at a chamfer angle a of -15 °.
  • the rake angle b also resulting from FIG. 4 is + 10 °.
  • the chamfer width is for example 0.15 mm.
  • the common tangent 19 of the convex cutting edge portions 13 and 14 with the base 10 and 11 forms an angle of about 35 °.
  • a tangent 20 which is placed on the outgoing portion of the cutting edge portion 13 at the transition to the respective base. This tangent 20 forms with the base an angle which is about 4 °.
  • the cutting edges 13 to 15 are inclined relative to the longitudinal central axis 21 of the cutting insert by an inclination angle c, which is preferably up to 10 °.
  • the cutting insert has a total of four actively usable cutting edges, with which in particular stepped oil band contours can be processed, either the expiring sections 22 or 23 depending on the clamping direction of the cutting insert for the production of the cheek contour.
  • the prescribed cutting insert may have on the chip surface chip forming and clamping elements in the form of subsidence or elevations.
  • the cutting insert consists of a hard metal or a cermet material, which may optionally also be coated. Typical coating materials are carbides, nitrides, oxides of the IVa to VLa metals as well as aluminum oxide, but also diamond coatings.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Milling Processes (AREA)
  • Cutting Tools, Boring Holders, And Turrets (AREA)

Abstract

L'invention concerne une plaquette de coupe, destinée notamment à l'usinage de vilebrequins, comportant deux surfaces de base parallèles (10, 11) qui sont traversées par un orifice (12) servant à recevoir une vis de serrage et qui se transforment, au niveau de leurs arêtes courtes, en faces arrondies délimitées chacune latéralement par des arêtes de coupe. Selon l'invention, au moins une paire d'arêtes de coupe présente des gradins et comporte deux parties convexes (13,14) ainsi qu'une partie concave (15) située entre ces dernières, la partie convexe extérieure (13) s'étendant sur un angle de 180°.
EP06761802A 2005-08-08 2006-07-14 Plaquette de coupe Withdrawn EP1912757A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE202005012615U DE202005012615U1 (de) 2005-08-08 2005-08-08 Schneideinsatz
PCT/DE2006/001222 WO2007016890A1 (fr) 2005-08-08 2006-07-14 Plaquette de coupe

Publications (1)

Publication Number Publication Date
EP1912757A1 true EP1912757A1 (fr) 2008-04-23

Family

ID=35267885

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06761802A Withdrawn EP1912757A1 (fr) 2005-08-08 2006-07-14 Plaquette de coupe

Country Status (11)

Country Link
US (1) US8858132B2 (fr)
EP (1) EP1912757A1 (fr)
JP (1) JP5541862B2 (fr)
KR (1) KR20080023761A (fr)
CN (3) CN102974881A (fr)
BR (1) BRPI0614369A2 (fr)
CA (1) CA2617619A1 (fr)
DE (1) DE202005012615U1 (fr)
MX (1) MX2008001805A (fr)
RU (1) RU2398661C2 (fr)
WO (1) WO2007016890A1 (fr)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005038021B4 (de) * 2005-07-11 2016-07-21 Kennametal Widia Produktions Gmbh & Co. Kg Verfahren zur zerspanenden Bearbeitung von Kurbelwellen und Vorrichtung zur Durchführung dieses Verfahrens
DE102009017602A1 (de) * 2009-04-16 2010-10-21 Kennametal Inc. Schneideinsatz und Werkzeug
DE102013101311B4 (de) * 2013-02-11 2022-06-15 Kennametal Inc. Innenfräser
DE102014106516B4 (de) * 2014-05-09 2016-03-03 Kennametal Inc. Werkzeug zum Dreh-Drehräumen von Werkstücken
EP3009217B1 (fr) * 2014-10-13 2017-07-05 Sandvik Intellectual Property AB Insert de coupe tangentielle et outil de fraisage le comportant
DE102015102044A1 (de) * 2015-02-12 2016-08-18 Kennametal Inc. Fräswerkzeug und Schneideinsatz für ein solches Fräswerkzeug
US9999927B2 (en) * 2015-11-30 2018-06-19 Iscar, Ltd. Parting-off tool assembly with single-cutting-edged solid cutting insert and rigid-insert-seat tool
RU2658567C1 (ru) * 2017-03-03 2018-06-21 Федеральное государственное бюджетное образовательное учреждение высшего образования "Московский государственный университет имени М.В. Ломоносова" (МГУ) Твердосплавная микрофреза с алмазным износостойким покрытием
EP3456450B1 (fr) * 2017-09-13 2022-12-21 Sandvik Intellectual Property AB Plaquette de coupe et outil de fraisage de vilebrequin
RU2682557C1 (ru) * 2018-03-12 2019-03-19 Федеральное государственное бюджетное образовательное учреждение высшего образования "Российский университет транспорта (МИИТ)" РУТ (МИИТ) Режущий инструмент для обработки металлов резанием
KR102509528B1 (ko) 2021-02-05 2023-03-14 (주)포인트엔지니어링 전기 전도성 접촉핀
US11433460B1 (en) 2021-10-26 2022-09-06 Prince Mohammad Bin Fahd University Cutting insert

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Title
See references of WO2007016890A1 *

Also Published As

Publication number Publication date
RU2008103667A (ru) 2009-09-20
KR20080023761A (ko) 2008-03-14
US8858132B2 (en) 2014-10-14
RU2398661C2 (ru) 2010-09-10
JP5541862B2 (ja) 2014-07-09
CN102974881A (zh) 2013-03-20
CN104001982A (zh) 2014-08-27
JP2009504417A (ja) 2009-02-05
MX2008001805A (es) 2008-04-09
CN101227993A (zh) 2008-07-23
WO2007016890A1 (fr) 2007-02-15
DE202005012615U1 (de) 2005-10-27
CA2617619A1 (fr) 2007-02-15
BRPI0614369A2 (pt) 2011-03-22
WO2007016890A8 (fr) 2008-01-31
US20090232609A1 (en) 2009-09-17

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