WO2009047166A1 - Garniture en matière dure et son serrage mécanique - Google Patents

Garniture en matière dure et son serrage mécanique Download PDF

Info

Publication number
WO2009047166A1
WO2009047166A1 PCT/EP2008/063077 EP2008063077W WO2009047166A1 WO 2009047166 A1 WO2009047166 A1 WO 2009047166A1 EP 2008063077 W EP2008063077 W EP 2008063077W WO 2009047166 A1 WO2009047166 A1 WO 2009047166A1
Authority
WO
WIPO (PCT)
Prior art keywords
hard material
material insert
pocket
carrier body
cutting tool
Prior art date
Application number
PCT/EP2008/063077
Other languages
German (de)
English (en)
Inventor
Wolfgang Zitzlaff
Raouf Ben Amor
Wolfgang KRÜMMEL
Original Assignee
Ceramtec Ag
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 Ceramtec Ag filed Critical Ceramtec Ag
Priority to EP08838021A priority Critical patent/EP2209576A1/fr
Publication of WO2009047166A1 publication Critical patent/WO2009047166A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B29/00—Holders for non-rotary cutting tools; Boring bars or boring heads; Accessories for tool holders
    • B23B29/04—Tool holders for a single cutting tool
    • B23B29/046—Tool holders for a single cutting tool with an intermediary toolholder
    • 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
    • B23B27/1625—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 with plate-like cutting inserts of special shape clamped by a clamping member acting almost perpendicularly on the chip-forming plane
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2200/00—Details of cutting inserts
    • B23B2200/08—Rake or top surfaces
    • B23B2200/085—Rake or top surfaces discontinuous
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2200/00—Details of cutting inserts
    • B23B2200/12—Side or flank surfaces
    • B23B2200/125—Side or flank surfaces discontinuous
    • B23B2200/126—Side or flank surfaces discontinuous stepped
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2205/00—Fixation of cutting inserts in holders
    • B23B2205/12—Seats for cutting inserts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2205/00—Fixation of cutting inserts in holders
    • B23B2205/16—Shims

Definitions

  • the invention relates to a cutting tool consisting essentially of a support tool with a recess in which a carrier body and a replaceable cutting body are arranged and held by a clamping element and the cutting body is seated with its underside on the carrier body.
  • indexable inserts are used, on which a hard material of CBN or PCD permanently by sintering or soldering in the corner area or over the entire surface of or on a mostly made of hard metal Carrier body is attached.
  • the indexable insert can also consist entirely of the hard material. This hard material is in contact with the workpiece to be machined with a defined cutting edge, carries off material during its cutting application and wears out after a certain period of use. By turning and turning the insert several times, the user can reuse a limited number of uncut corners, depending on the type of insert 4 to 8 corners.
  • the number of usable cutting corners for surface-occupied or corner-fitted CBN / PCD indexable inserts is lower due to their design than for full-CBN indexable inserts.
  • these indexable inserts are very expensive due to the high cost of raw materials and complex manufacturing processes.
  • the price per cutting edge and the number of processed workpieces with a cutting edge is the calculation base for the
  • the object of the invention is to reduce the production costs.
  • the carrier body has a pocket with a bottom and side surfaces
  • the cutting body is a hard material insert, which sits with its underside on the bottom of the bag, the top of the hard material insert substantially flush Top side of the carrier body extends and abut side surfaces of the hard material insert on side surfaces of the bag and thereby the hard material insert is embedded in the pocket of the carrier body.
  • the hard material insert can be fixed mechanically on a standard carrier tool by clamping and is substantially smaller than a cutting insert according to the prior art, whereby the manufacturing costs are reduced.
  • the expression that the upper side of the hard material insert runs substantially flush with the upper side of the carrier body also means that the upper side of the hard material insert is slightly higher than the upper side of the carrier body. This will be described later.
  • the hard material insert can be made extremely small and rotatable and reversible with removable cutting corners held on the support body, without reducing the possible applications over conventional inserts according to the prior art.
  • the highest possible number of usable cutting corners and a high accuracy of change and user friendliness are further features of the invention.
  • the support body corresponds in appearance, in the outer dimensions and its shape of a DIN-ISO standard indexable insert according to the prior art and the volume, the surface and thickness of the hard material insert are significantly smaller than comparable for the respective field of application Cutting body according to the prior art.
  • the surface of the hard material insert is reduced to about% of the otherwise required area of a full CBN indexable insert according to the prior art.
  • the volume and thus the weight reduction could be reduced by this invention to 1/6 of the original mass of a prior art indexable insert.
  • Reduction of raw material costs, manufacturing costs and unit costs per hard material use by more than 50% at the usual costs according to the prior art are possible with this invention.
  • wire erosion or laser cutting the blanks of this hard material insert according to the invention can be easily produced. Necessary surface grinding of several blanks is usually done by placing in a cage whose individual fields of
  • Size and shape of the hard material insert are adjusted. Necessary circumferential grinding is usually carried out between two rams on corresponding grinding machines.
  • the top side and / or bottom side of the hard material insert is advantageously designed to be smooth or provided with a depression.
  • the two types of hard material inserts are similar in thickness, depending on the future application, designed differently.
  • the hard material inserts according to the invention differ in the nature of the surface.
  • the hard material insert is provided with a trough which is already known from WO 03/013770 A1.
  • the trough can according to the invention also have a different shape and serves for the form-fitting tension on the carrier body.
  • a tensioning element also called a clamping claw, with an adapted shaped nose engages in the recess. - A -
  • the hard material insert has a trough for clamping, which is circular in shape and has a spherical or circular elevation in the middle and the tip of the elevation lies above the trough bottom and below the upper side of the hard material insert.
  • the hard-material insert also preferably has a first clamping recess for clamping into the cutting tool and a second clamping recess arranged coaxially with the first clamping recess, wherein the first clamping recess is arranged lower than the second clamping recess and both lower than the upper side of the hard material insert 1 , As a result, an extremely durable and strong attachment is achieved.
  • a hard material insert with a smooth surface offers less due to the design
  • the side surfaces of the pocket with the adjacent side surfaces of the hard material insert form a positive connection. As a result, an additional vertical anchoring is achieved.
  • the carrier body at the level of the bottom of the bag is partially horizontally slotted in the extension of the pocket inwardly vertically such that the hard material insert is arranged like a forceps between two elastic gripping arms, one gripping arm one side surface and the other Gripper arm another opposite side surface of the bag forms.
  • This forceps-like clamping of the hard material insert by the elastic gripping arms likewise reinforces the anchoring of the hard material insert on the carrier body.
  • the outer lateral surfaces of the gripping arms project beyond the lower side surfaces of the carrier body by a distance x.
  • the distance x is smaller than the width of the vertical slot.
  • the depth of the pocket is smaller than the thickness of the
  • Hard material insert so that the hard material insert projects slightly beyond the surface of the carrier body. This is useful so that in the tensioned state, the pressure surfaces of the clamping element rests on the higher surface of the hard material insert to unfold here also the clamping force can. Despite this Kochragung the top of the hard material insert is substantially flush with the top of the carrier body.
  • the pocket runs symmetrically to a diagonal of the carrier body and the vertical slot is arranged in extension of the pocket on its diagonal.
  • the hard material insert is formed symmetrically to a corner of the carrier body.
  • At least one recess and on the clamping element at least one pin adapted to the recess are arranged on the surface of the carrier body, wherein the recess and the pin have such an eccentricity that during clamping the clamping element the carrier body in the recess draws. This is another There is force, which pulls the carrier body into the recess of the carrier tool.
  • a recess on the diagonal is arranged in extension of the vertical slot and opens the slot in the recess.
  • the recess is thus directly in extension of the
  • a recess is arranged on each gripping arm, resulting in two forces which pull the Sukör- per in the recess of the carrier tool.
  • the hard material insert consists of a hard material such as CBN (cubic boron nitride), PCD (polycrystalline diamond), hard metal, ceramic, mixed ceramic or another suitable hard material.
  • CBN cubic boron nitride
  • PCD polycrystalline diamond
  • the indexable insert does not have to be DIN-ISO standardized. DIN ISO is standardized, however, is preferred.
  • the support body at the level of the bottom of the bag is partially horizontal and slit vertically in extension of the pocket inwardly such that two elastic gripping arms are provided, wherein one gripping arm forms a side surface of the pocket and the other gripping arm forms a second opposite side surface of the pocket and both gripping arms are elastic to each other.
  • the volume, the surface area and the thickness of the hard material insert are significantly smaller than those of a comparable prior art cutting body for the respective field of application.
  • An inventive hard material insert is characterized in that the top and / or bottom of the hard material insert is smooth or provided with a trough.
  • the hard material insert preferably has a recess for clamping, which is of circular design and has a spherical or circular elevation in the middle and the tip of the elevation lies above the trough bottom and below the upper side of the hard material insert.
  • the hard material insert preferably has a first clamping recess for clamping into the cutting tool and a second clamping recess is arranged coaxially with the first clamping recess, wherein the first clamping recess is lower than the second clamping recess and both lower than the upper side of the hard material insert. With such a trough the best properties were achieved.
  • the invention describes a novel in its shape and handling interchangeable hard material insert 1 and 12 (see Figures 1 - 27), the z. B. for use on DIN-ISO standardized carrier tools 3 in the machining industry instead of the commercial indexable inserts finds its application.
  • this replaceable hard material insert 1 and 12 is received, held and guided on a carrier body 5, 13, 23.
  • the support body 5, 13, 23 are very similar in appearance, in the outer dimensions and their shape of a DIN-ISO standard indexable insert.
  • the hard material insert 1 or 12 preferably consists of a particularly shaped according to the invention platelets of CBN (cubic boron nitride), PCD (polycrystalline diamond), hard metal, ceramic, mixed ceramics or another suitable hard material for cutting mostly metallic workpieces.
  • This hard material insert 1 or 12 is accommodated in a matched pocket 7, 17 or 27 on a carrier body 5, 13, 23 which in turn is located in a matched recess 4 (see FIG. 6) on a carrier tool 3. Both are stretched there and held with a fixed to the support tool 3 and the hard-material insert 1 and 12, or on the support body 5, 13, 23 adapted and engaging clamping element 2, 31, 41st
  • Basic shape of the two hard material inserts 1 and 12 are the same, the surface of the hard material insert 1 is provided with a trough 18 for clamping, the surface of the hard material insert 12 is smooth. Both surface types lead by their nature to a different mounting option.
  • a corresponding carrier body 5, 13 and 23 and also a corresponding clamping element 2, 31 and 41 is required according to the invention.
  • the side shape of a hard material insert 12 may be specially shaped.
  • the side walls of the hard material insert 12 and those of the carrier body 5, 13 and 23 have a shape adapted to one another, which then have an additional positive connection. Examples of possible side shapes of the hard material inserts 12 are shown in FIGS. 25 to 27.
  • the hard material insert 1, 12 has a chip breaker 34.
  • This chip breaker 34 can have any shape and type in the hard material insert and be introduced by means of grinding, lasers, sintering or other suitable methods mirror image and opposite, or at each cutting edge of the hard material insert.
  • the fixing clamping claw or clamping element 41 (see FIGS. 21-24) has on its underside two conical pins 43 and 44 which are closer together than the cylindrical / conical bores / recesses 28 and 29 of the carrier body 23 under assembly These are in turn in the partially horizontally 22 and vertically slotted 21 carrier body 23.
  • the two left and right half of the support body surface 25, which act as gripping arms 19a, 19b, compressed and the hard material insert 12 is pressed down and held by the front surface 42 of the clamping claw 41.
  • the hard material insert 12 is clamped according to the invention with a pincer movement and by a further force effect by contact over the surface
  • the preferred material is a hot-work steel or a heat-resistant spring steel.
  • the slot width is according to experience at 0.05 mm to 1, 0 mm and z. B. be introduced by wire EDM.
  • the carrier body 13 and 23 is formed symmetrically, the axis of symmetry passing through the slot 11 or 21.
  • the depth of the pocket 7, 17, 27, which is bounded by the pocket bottom surface 17 or 27, is between 1, 0 mm and 4.0 mm. Their width is ideally 4.0 mm, so that the hard material insert 12 is also still manageable. Naturally, other dimensions can also be realized.
  • the depth of the pocket 7, 17, 27 is inventively somewhat less deep than the hard material insert 12 is high.
  • the rear side walls 16 and 26 in the pocket of the carrier body 13 or 23 are adapted according to the edge shape of the hard material insert 12 and serve as a stop to counteract the cutting forces arising during cutting and to hold the hard material insert 12 in position.
  • the cylindrical / conical bore / recesses 8, or 28 and 29 (Fig. 15 and Fig. 16) according to the invention have a diameter of about 3 mm.
  • the side walls are cone-shaped with an angle of 1 ° to 45 °, wherein the cone angle of the pins 33, hrs.43 and 44 on the clamping claws 31 or 41 (Fig. 19 and Fig. 23) should be smaller and smaller, so that the rounded
  • Spigot tip can slide during the clamping process in the tapered holes ideal.
  • the axial offset between the tapered holes and the tapered pins and the sliding movement on the tapered walls provide the defined retraction and forceps effect of this invention.
  • the hard material insert 1 has a recess 18 for clamping, which is of circular design and has a spherical or circular elevation 20 in the middle.
  • the tip of the elevation 20 is above the trough bottom and below the top of the hard material insert. 1
  • a clamping claw with an adapted shaped nose engages positively in the depression 18 of the hard material insert 1.
  • This trough 18 serves for form-fitting tension on a carrier body. Especially for pulling cuts, in which the hard material insert 1 could be pulled out of its seat by the acting cutting forces, this trough 18 offers itself.
  • the hard material insert 1 preferably has a first clamping recess 18 for clamping into the cutting tool. So that lapping or grinding operations of the upper side 52 of the hard material insert 1 do not influence the clamping properties of the hard material insert 1, a second clamping trough 24 is preferably arranged coaxially to the first trough 18, wherein the first trough 18 is lower than the second clamping trough 24 and both deeper than the top 52 of the hard material insert
  • the clamping claw of the tool lies on the second clamping recess 24 and intervenes, for example, with a nose in the first clamping recess 18 (see Figure 11, 12).
  • the hard material insert 1, 12 consist of PCBN or a CBN composite material, wherein the hard material insert 1, 12 preferably has a clamping trough or trough.
  • the clamping trough or trough can be circular and have a spherical or circular elevation in the middle, as described above.
  • the corresponding contour of the clamping trough or trough is preferably introduced via a corresponding shaping of the green body and the green body thus produced is then dried and sintered.
  • the hard material insert 1, 12 can also be provided with a coating.

Landscapes

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

Abstract

L'invention concerne un outil de coupe essentiellement constitué d'un outil porteur (3) doté d'une découpe (4) dans laquelle un corps porteur (5, 13, 23) et un corps de coupe remplaçable sont disposés et sont maintenus par un élément de serrage (2, 31, 41), le corps de coupe reposant par son côté inférieur sur le corps porteur (5, 13, 23). Pour diminuer les coûts de fabrication, l'invention propose que le corps porteur (5, 13, 23) présente une poche (7, 17, 27) dotée d'un fond et de surfaces latérales, le corps de coupe étant une garniture (1, 12) en matière dure dont le côté inférieur repose sur le fond de la poche (7, 17, 27), le côté supérieur de la garniture (1, 12) en matière dure s'étendant essentiellement à chant par rapport au côté supérieur du corps porteur (5, 13, 23) et les surfaces latérales de la garniture (1, 12) en matière dure reposant sur des surfaces latérales de la poche (7, 17, 27), la garniture (1, 12) en matière dure étant ainsi incorporée dans la poche (7, 17, 27) du corps porteur (5, 13, 23).
PCT/EP2008/063077 2007-10-02 2008-09-30 Garniture en matière dure et son serrage mécanique WO2009047166A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP08838021A EP2209576A1 (fr) 2007-10-02 2008-09-30 Garniture en matière dure et son serrage mécanique

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE102007047318 2007-10-02
DE102007047318.6 2007-10-02
DE102007061699.8 2007-12-19
DE102007061699 2007-12-19

Publications (1)

Publication Number Publication Date
WO2009047166A1 true WO2009047166A1 (fr) 2009-04-16

Family

ID=40263054

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2008/063077 WO2009047166A1 (fr) 2007-10-02 2008-09-30 Garniture en matière dure et son serrage mécanique

Country Status (3)

Country Link
EP (1) EP2209576A1 (fr)
DE (1) DE102008042493A1 (fr)
WO (1) WO2009047166A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9120155B2 (en) 2009-06-01 2015-09-01 Iscar, Ltd. Tool holder having a tool body and top clamp for retaining a cutting insert
US10207330B2 (en) 2014-01-22 2019-02-19 Saturnino Fiori Cate Srl Tool-holding device for a machining tool and method for locking a tool into a tool-holder
WO2022181773A1 (fr) 2021-02-25 2022-09-01 三菱マテリアル株式会社 Structure de bride d'une plaquette de coupe, et outil de coupe à arête de coupe remplaçable

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010030802A1 (de) 2009-07-03 2011-01-05 Ceramtec Ag Adapter für ein spanabhebendes Schneidwerkzeug zur Aufnahme eines Hartstoff-Einsatzes
CN102781610A (zh) * 2009-12-22 2012-11-14 陶瓷技术有限责任公司 夹紧系统
SE535420C2 (sv) * 2010-06-02 2012-07-31 Sandvik Intellectual Property Hårdmetallskär samt hårdmetallämne för tillverkning av dylika skär
DE102011082979A1 (de) * 2011-09-19 2013-03-21 Komet Group Gmbh Reibwerkzeug und Verfahren zu dessen Herstellung

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3980443A (en) * 1974-09-16 1976-09-14 Kennametal Inc. Tool holder
DE3838816A1 (de) * 1988-11-17 1990-05-23 Feldmuehle Ag Schneidwerkzeug fuer die spanabhebende bearbeitung
US20040256608A1 (en) * 2001-07-26 2004-12-23 Otto Eder Metal cutting tool and cutting plate provided in the shape of a donut

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3980443A (en) * 1974-09-16 1976-09-14 Kennametal Inc. Tool holder
DE3838816A1 (de) * 1988-11-17 1990-05-23 Feldmuehle Ag Schneidwerkzeug fuer die spanabhebende bearbeitung
US20040256608A1 (en) * 2001-07-26 2004-12-23 Otto Eder Metal cutting tool and cutting plate provided in the shape of a donut

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9120155B2 (en) 2009-06-01 2015-09-01 Iscar, Ltd. Tool holder having a tool body and top clamp for retaining a cutting insert
US10207330B2 (en) 2014-01-22 2019-02-19 Saturnino Fiori Cate Srl Tool-holding device for a machining tool and method for locking a tool into a tool-holder
WO2022181773A1 (fr) 2021-02-25 2022-09-01 三菱マテリアル株式会社 Structure de bride d'une plaquette de coupe, et outil de coupe à arête de coupe remplaçable
KR20230145576A (ko) 2021-02-25 2023-10-17 미쓰비시 마테리알 가부시키가이샤 절삭 인서트의 클램프 구조 및 날끝 교환식 절삭 공구

Also Published As

Publication number Publication date
EP2209576A1 (fr) 2010-07-28
DE102008042493A1 (de) 2009-04-09

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