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WO2012142641A1 - Foret en céramique pour le perçage à haute performance du fer et de la fonte - Google Patents

Foret en céramique pour le perçage à haute performance du fer et de la fonte Download PDF

Info

Publication number
WO2012142641A1
WO2012142641A1 PCT/AT2012/050048 AT2012050048W WO2012142641A1 WO 2012142641 A1 WO2012142641 A1 WO 2012142641A1 AT 2012050048 W AT2012050048 W AT 2012050048W WO 2012142641 A1 WO2012142641 A1 WO 2012142641A1
Authority
WO
WIPO (PCT)
Prior art keywords
tool
drill
cutting insert
cutting
base body
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.)
Ceased
Application number
PCT/AT2012/050048
Other languages
German (de)
English (en)
Inventor
Oswald SCHEIBENBAUER
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.)
Tcm International Tool Consulting & Management GmbH
Original Assignee
Tcm International Tool Consulting & Management GmbH
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 Tcm International Tool Consulting & Management GmbH filed Critical Tcm International Tool Consulting & Management GmbH
Priority to JP2014505458A priority Critical patent/JP2014511776A/ja
Priority to EP12720072.3A priority patent/EP2699373A1/fr
Publication of WO2012142641A1 publication Critical patent/WO2012142641A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • B23B2222/00—Materials of tools or workpieces composed of metals, alloys or metal matrices
    • B23B2222/14—Cast iron
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2222/00—Materials of tools or workpieces composed of metals, alloys or metal matrices
    • B23B2222/28—Details of hard metal, i.e. cemented carbide
    • 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
    • B23B2226/18—Ceramic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2240/00—Details of connections of tools or workpieces
    • B23B2240/16—Welded connections
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2240/00—Details of connections of tools or workpieces
    • B23B2240/36—Connections using a tongue and a hollow of corresponding prismatic form

Definitions

  • the invention relates to a tool for machining workpieces, in particular for drilling cast iron materials, comprising a base body of a first material and a cutting insert of a second material having a higher hardness than the first material, wherein the cutting insert on
  • Ceramic inserts are today used in the machining industry
  • Cutting edge can still be lowered, so still remain the high cost of the ceramic cutting material, which partially compensate for the practical advantages.
  • a drilling tool which has a shank made of a hard metal and a cutting insert made of a ceramic made of silicon nitride.
  • the cutting insert is in the region of a slot of the base body made of hard metal materially joined to the body, wherein the cohesive connection soldering or gluing comes into question. Mentioned is also a dull cohesive
  • connection of a mostly cylindrical cutting insert with one end of a shaft-shaped base body is advantageous that the shaft is tough and has a high strength, whereas the attached
  • Cutting insert can have a high wear resistance.
  • such tools have not prevailed in practice, since they have neither sufficient quality in terms of high cutting speeds nor long tool life.
  • the object of the invention is to provide a tool of the type mentioned, in particular a drill, with the high cutting speeds can be achieved in a machining of workpieces and at the same time provides long life.
  • the cutting insert has a V-shaped projection and the base body has a corresponding area and the cutting insert is cohesively attached to the corresponding area of the base body.
  • the V-shaped projection is preferably formed with an opening angle of 120 ° to 160 °, preferably 130 ° to 150 °.
  • the v-shaped projection is advantageously formed on the cutting insert projecting. It then results for the main body a corresponding groove or recess for the corresponding area. But it is also possible a reverse situation, wherein the groove is formed in the cutting insert as a negative v-shaped approach and the body has a corresponding projecting portion.
  • both the v-shaped projection in the cutting insert and the corresponding region in the base body can be created in a simple manner by Einschieifen.
  • the basic body consists of
  • the cutting insert may consist of a ceramic or a ceramic whisker composite material.
  • the main body preferably extends to the cutting insert or vice versa.
  • the general concept of the invention can be transferred to any tools for machining, but is preferably used when the tool is designed as a drill, in particular twist drill.
  • An inventively designed drill basically has several main cutting edges, preferably two main cutting edges are provided, which extend at the end of the drill. In connection therewith, a residual cross-section may be provided at the end, which has a length of 1% to 5%, in particular 2% to 3%, of one
  • Drill nominal diameter is formed. The main cutting edges close to the
  • Residual cross-section on. The formation of the residual cross-section with the mentioned length on the one hand leads to a good centering behavior in a cutting and
  • Shaping the main cutting edge also shows that a high abrasive wear, which occurs in particular when machining cast iron materials, fewer attack points and thus lower acting forces and, as a result, longer tool life are given. It is particularly favorable if the main cutting edges are rounded, preferably at least along rectilinear regions thereof. If the main cutting edges are provided with a defined rounding starting from the cross cutting edge to an outer side of the drill, it is possible despite a high hardness of the ceramic
  • a radius of edge rounding may range from 0.5% to 2%, preferably 0.8% to 1.2%, of an outer diameter of the drill.
  • a plurality of, preferably two, flutes may be provided, wherein a spacing of the flutes in plan view of one end of the drill is at least 20%, preferably 25% to 35%, of the outer diameter of the drill.
  • a core diameter is reinforced, so that even at high speeds sufficient rigidity of the drill is given. Incidentally, by this measure, high axial cutting forces can be better excluded from the shank of the drill.
  • a plurality, preferably four, guide bevels may be provided, which extend along the outer side or an outer surface of the drill.
  • four chamfers allow a better guidance of the drill in a borehole and thus lead to a higher stability of the tool in the drilling process.
  • a smoother running of the drill by a better support results in a better circular accuracy and a much better bore surface and incidentally leads to less vibration, which for ceramic cutting a special
  • the guide bevels viewed from the main cutting edges, are designed to taper in the axial direction in order to reduce frictional forces and to prevent the drill from jamming in the borehole, which is usually caused by incipient abrasive wear on the outer diameter of the drill is.
  • Base body has a smaller diameter than in the region of the main cutting or the cutting insert, with a transition to smaller diameter preferred lies in the area of the guide chamfers.
  • only the ceramic cutting head takes over a guide of the tool or drill in a bore. Jamming of the drill can then be at least largely avoided.
  • FIG. 1 shows a blank of a tool according to the invention
  • FIG. 2 shows an inventive tool in the form of a drill in a side view.
  • Fig. 3 is a plan view of a drill of Fig. 2;
  • Fig. 4 is a section along the line III-III in Fig. 3;
  • Fig. 5 is an enlarged view of an area at the transition of a main cutting edge to a secondary cutting edge.
  • a blank of a tool 1 according to the invention is shown in a highly schematic representation.
  • the blank of the tool 1 comprises a base body 2, which is only partially shown, and a cutting insert 3, which is arranged on the base body 2.
  • the basic body 2, which is shown only partially, usually consists of a hard metal which has a high toughness and a high strength.
  • the cutting insert 3, however, is formed of a ceramic, for example
  • Silicon nitride or other highly wear-resistant ceramic which may optionally be reinforced with particles and / or fibers, such as whiskers.
  • Cutting insert 3 is formed by grinding at one end with a projecting V-shaped projection 4, which may have an opening angle ⁇ of 120 ° to 160 °.
  • One end of the V-shaped projection 4 is made flat or truncated.
  • a corresponding region 5 is also created in the main body 2 by grinding, but with a central edge, so that when joining a distance between the truncated end of the v-shaped projection 4 and the central edge is given.
  • the cutting insert 3 is connected to the base body 2 by soldering, wherein a commercial active solder is used. In principle, it is favorable if the opening angle ⁇ has a value of 130 ° to 150 °, for example 140 °, as in the exemplary embodiment.
  • the opening angle ⁇ has a value of 130 ° to 150 °, for example 140 °, as in the exemplary embodiment.
  • the cutting insert 3 is cohesively connected to the base body 2 by a solder along the projecting V-shaped projection 4.
  • two main cutting edges 7 are arranged, which, as is apparent from Fig. 3, from an outer diameter or Bohrernenn trimmesser D to a center or a
  • Tool axis X which is arranged along the longitudinal axis of the substantially cylindrically shaped drill run.
  • the main cutting edges 7 extend substantially straight from an outer edge of the drill first and then pass over a radius into a residual cross cutting edge 6 arranged in the center.
  • the residual cross-section 6 is rectilinear and preferably has a length of about 2.5% of the drill nominal diameter D, which at the same time ensures a good centering behavior when cutting at a low axial cutting pressure of the drill. Due to the curved transition of the main cutting edges 7 into the residual cross cutting edge 6 or the intended radius, possibly also a plurality of adjoining curved regions with different radii, an abrasive wear in the use of the drill can be reduced.
  • the main cutting edges 7 may be rounded at least in the region of the rectilinear portions in order to prevent the chips from breaking away
  • the main cutting edges 7 are arranged as shown in Fig. 2 with a tip angle ß of 140 °, although the tip angle ß may also have other values in the range of 130 ° to 150 °.
  • Main cutting edge 7 connect two open spaces 11, 12.
  • the first free surface 1 1 connects to the second free surface 12 such that a common connecting edge extends through the center of the drill.
  • the first flank 1 1 has a sloping angle of about 8 ° to 13 °, while the second flank 12 may have a larger sloping angle, for example 17 ° to 25 °.
  • the corresponding angles are 9 ° for the first free surface 11 and 20 ° for the second free surface 12, as shown in Fig. 4.
  • a protective chamfer 14 which has approximately an angle of 30 ° to 40 ° to the tool axis X. Following the protective chamfer 14, the secondary cutting edges 13, which are chamfered, run. The secondary cutting edges 13, as well as the four guide chamfers 8, which each define in pairs a recess 9, a spiral-shaped course, wherein a spiral angle is about 5 °. A defined by the minor cutting edges 13 surface 15 eventually goes into flutes 10 on.
  • the flutes 10 are spaced from each other in cross-section at a distance A.
  • the distance A is about 30% of
  • Drill nominal diameter D which gives the drill a correspondingly strong center or high rigidity.
  • the cutting insert 3 is provided with a

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Drilling Tools (AREA)

Abstract

L'invention porte sur un outil (1) destiné à l'usinage de pièces par enlèvement de copeaux, en particulier pour le perçage du fer ou de la fonte, qui comprend un corps de base (2) fait d'une première matière et une insertion de coupe (3) faite d'une seconde matière qui possède une plus haute dureté que la première matière, l'insertion de coupe (3) étant fixée au corps de base (2) par continuité de matière. Selon l'invention, pour atteindre de hautes vitesses de coupe et de longues durées d'utilisation, l'insertion de coupe (3) présente une saillie (4) en forme de V et le corps de base (2) présente une région (5) qui lui correspond, et l'insertion de coupe (3) est fixée par la saillie (4) à la région correspondante (5) du corps de base (2) par continuité de matière.
PCT/AT2012/050048 2011-04-19 2012-04-10 Foret en céramique pour le perçage à haute performance du fer et de la fonte Ceased WO2012142641A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2014505458A JP2014511776A (ja) 2011-04-19 2012-04-10 鉄−鋳造材料の高性能穴あけのためのセラミックドリル
EP12720072.3A EP2699373A1 (fr) 2011-04-19 2012-04-10 Foret en céramique pour le perçage à haute performance du fer et de la fonte

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ATA558/2011 2011-04-19
AT5582011A AT511377B1 (de) 2011-04-19 2011-04-19 Keramikbohrer zum hochleistungsbohren von eisen-gusswerkstoffen

Publications (1)

Publication Number Publication Date
WO2012142641A1 true WO2012142641A1 (fr) 2012-10-26

Family

ID=46052479

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AT2012/050048 Ceased WO2012142641A1 (fr) 2011-04-19 2012-04-10 Foret en céramique pour le perçage à haute performance du fer et de la fonte

Country Status (4)

Country Link
EP (1) EP2699373A1 (fr)
JP (1) JP2014511776A (fr)
AT (1) AT511377B1 (fr)
WO (1) WO2012142641A1 (fr)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3912414A (en) * 1972-06-09 1975-10-14 Sumitomo Electric Industries Cemented carbide twist drill
US4111589A (en) * 1974-03-28 1978-09-05 Th. Kieserling & Albrecht Multiple cutting plate for peeling machines
US5312208A (en) * 1992-04-28 1994-05-17 Fuji Seiko Corporation Burnishing drill
JPH06143007A (ja) * 1992-11-06 1994-05-24 Ishikawajima Harima Heavy Ind Co Ltd セラミック製切削工具及びその研削装置
JP2001105217A (ja) * 1999-10-01 2001-04-17 Honda Motor Co Ltd 穴仕上げ加工用ドリル
DE10114882A1 (de) 2001-03-26 2002-10-24 Friedrich-Wilhelm Bach Bohrwerkzeug
DE102008014234A1 (de) * 2008-03-14 2009-09-17 Gühring Ohg Spanabhebendes Werkzeug
DE102009030689A1 (de) * 2008-06-28 2009-12-31 Gühring Ohg Mehrschneidiges Bohrwerkzeug

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55164406A (en) * 1979-05-30 1980-12-22 Ogura Houseki Seiki Kogyo Kk Diamond drill
DE3314349A1 (de) * 1983-04-20 1984-10-25 Gühring, Gottlieb, 7470 Albstadt Bohrungs-nachbearbeitungswerkzeug
JPS606310A (ja) * 1983-06-17 1985-01-14 Toshiba Tungaloy Co Ltd ツイストドリルの製造法
JPS6154408U (fr) * 1984-09-11 1986-04-12
JPS62130809U (fr) * 1986-02-10 1987-08-18
JPS62241606A (ja) * 1986-04-09 1987-10-22 Mitsubishi Motors Corp 切削用ドリル
JPS6310014U (fr) * 1986-07-03 1988-01-22
US5038642A (en) * 1991-02-25 1991-08-13 General Motors Corporation Method of making drill with wear inserts
JP2964664B2 (ja) * 1991-02-27 1999-10-18 住友電気工業株式会社 ダイヤモンド被覆マイクロドリル
DE202005020931U1 (de) * 2005-08-29 2006-12-07 MAPAL Fabrik für Präzisionswerkzeuge Dr. Kress KG Bohrer für metallische Werkstoffe
DE502007005913D1 (de) * 2006-10-13 2011-01-20 Kennametal Inc Bohrerspitze für ein Bohrwerkzeug
JP2009178791A (ja) * 2008-01-30 2009-08-13 Kyocera Corp 回転工具およびその製造方法
WO2010055559A1 (fr) * 2008-11-12 2010-05-20 Ｎｅｘｔ Ｉ＆Ｄ株式会社 Perceuse

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3912414A (en) * 1972-06-09 1975-10-14 Sumitomo Electric Industries Cemented carbide twist drill
US4111589A (en) * 1974-03-28 1978-09-05 Th. Kieserling & Albrecht Multiple cutting plate for peeling machines
US5312208A (en) * 1992-04-28 1994-05-17 Fuji Seiko Corporation Burnishing drill
JPH06143007A (ja) * 1992-11-06 1994-05-24 Ishikawajima Harima Heavy Ind Co Ltd セラミック製切削工具及びその研削装置
JP2001105217A (ja) * 1999-10-01 2001-04-17 Honda Motor Co Ltd 穴仕上げ加工用ドリル
DE10114882A1 (de) 2001-03-26 2002-10-24 Friedrich-Wilhelm Bach Bohrwerkzeug
DE102008014234A1 (de) * 2008-03-14 2009-09-17 Gühring Ohg Spanabhebendes Werkzeug
DE102009030689A1 (de) * 2008-06-28 2009-12-31 Gühring Ohg Mehrschneidiges Bohrwerkzeug

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP2699373A1 *

Also Published As

Publication number Publication date
EP2699373A1 (fr) 2014-02-26
AT511377B1 (de) 2013-09-15
JP2014511776A (ja) 2014-05-19
AT511377A1 (de) 2012-11-15

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