EP1466710A2 - Outil de coupe chauffant - Google Patents

Outil de coupe chauffant Download PDF

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Publication number
EP1466710A2
EP1466710A2 EP04000670A EP04000670A EP1466710A2 EP 1466710 A2 EP1466710 A2 EP 1466710A2 EP 04000670 A EP04000670 A EP 04000670A EP 04000670 A EP04000670 A EP 04000670A EP 1466710 A2 EP1466710 A2 EP 1466710A2
Authority
EP
European Patent Office
Prior art keywords
cutting tool
ceramic
cutting
matrix
oxide
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.)
Granted
Application number
EP04000670A
Other languages
German (de)
English (en)
Other versions
EP1466710A3 (fr
EP1466710B1 (fr
Inventor
Elmar Günther
Ulrike Dr. Kaufmann
Hans-Joachim Dr. Ritzhaupt-Kleissl
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.)
Forschungszentrum Karlsruhe GmbH
Original Assignee
Forschungszentrum Karlsruhe 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 Forschungszentrum Karlsruhe GmbH filed Critical Forschungszentrum Karlsruhe GmbH
Publication of EP1466710A2 publication Critical patent/EP1466710A2/fr
Publication of EP1466710A3 publication Critical patent/EP1466710A3/fr
Application granted granted Critical
Publication of EP1466710B1 publication Critical patent/EP1466710B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F3/00—Severing by means other than cutting; Apparatus therefor
    • B26F3/06—Severing by using heat
    • B26F3/08—Severing by using heat with heated members
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/08—Means for treating work or cutting member to facilitate cutting
    • B26D7/10—Means for treating work or cutting member to facilitate cutting by heating

Definitions

  • the invention relates to a cutting tool according to the first Claim and its use according to claim 7.
  • Cutting tools with ceramic blades are wide in technology common. On the one hand there are cutting tools with a metallic core with one or more wear-resistant Layers of ceramic is covered. To change are cutting tools, especially knives, with cutting edges All-ceramic known.
  • the invention has for its object a cutting tool propose that for tough and tough materials, Particularly suitable for those with a high proportion of synthetic fibers is. Another task is to specify a purpose for the cutting tool.
  • the basic principle of the cutting tool according to the invention is that the material to be cut is divided by a heatable cutting edge becomes.
  • the cutting tool should have a temperature at the cutting edge from at least 400 ° C, but preferably from 800 ° C to Reach 1200 ° C. These temperatures are controlled by resistance heating achieved. So the cutting tool is at his Use in this way with the two poles of a voltage source connected that at least the cutting edge of electrical Current flows through and is heated in this way.
  • the Resistance of the cutting tool is preferably in the range from 6 to 14 Q. This resistance can be determined by a certain geometric shape and through a suitable choice of material can be set. Current and voltage are in use of the cutting tool regulated by a control unit.
  • the cutting tool is built homogeneously and consists of one Mixed ceramics that consist of at least two different components is composed.
  • the first component is an electrical one non-conductive matrix ceramics. Suitable as matrix ceramics metal oxide ceramics such as zirconium dioxide or aluminum oxide.
  • the matrix ceramic gives the cutting tool that desired mechanical properties such as hardness, flexural strength and wear resistance.
  • a conductive oxide ceramic is embedded in the matrix ceramic.
  • the known electrically conductive, non-oxide ceramics such as titanium or zirconium nitride as an example of the carbides, nitrides and diborides of the elements of the IV. To VI. Subgroup of the periodic system are not suitable for the cutting tool according to the invention because they cannot be heated to the required high temperatures in contact with atmospheric oxygen without being destroyed.
  • an indium tin oxide (often abbreviated with "ITO") of the general formula In 2-x Sn x O 3 , in which x assumes a value from 0 to 0.6, is particularly suitable as conductive oxide ceramic.
  • PCT ceramic means a ceramic with a positive temperature coefficient of electrical resistance.
  • the conductive oxide ceramic should be at least 15 vol .-% contribute to the mixed ceramics. With a smaller proportion the resistance of the cutting device is generally so high that the required conductivity is not guaranteed.
  • the Percentage of the conductive oxide ceramic can, on the other hand up to 85 vol .-%. In general, however, shares the conductive oxide ceramic in the range of 25 to 60 vol .-% chosen because then the cheap chemical and mechanical Properties of the matrix ceramic the quality of the Determine the cutting tool significantly.
  • the cutting tool is particularly suitable for materials, at which the division on the one hand with a sharp, mechanical Blade must be made, but on the other hand, at higher temperatures are easier to cut.
  • materials are in particular the textiles mentioned at the beginning or fabrics with a high proportion of synthetic fibers, especially automobile seat covers and vehicle interior linings.
  • the mixed ceramics of the Cutting tool can be varied. Generally it is from particularly advantageous if the cutting edge has the highest temperature occurs and the rest of the cutting tool becomes colder remains. This can be achieved through targeted variation the local electrical conductivity of the mixed oxide or by choosing a certain cutting edge geometry.
  • the conductivity of the mixed oxide is determined by the type and the proportion of matrix ceramics and conductive oxidic ceramics.
  • the particular suitability of the cutting tool according to the invention for cutting the aforementioned industrial textiles results from the fact that the heat is added during the separation process cutting material softened to the point of local melting is, which makes the separation process much easier and the Wear of the cutting tool is reduced accordingly.
  • the electrically conductive oxide ceramic ITO in the mixed ceramic, of which the cutting tool is made is currently used as a coating, especially as an anti-reflective layer or as a heat protection layer used.
  • the processing takes place in the Thin film process, i. H. by dusting (sputtering).
  • ITO sputtering targets are obtained by hot isostatic pressing of ITO powder generated because commercial ITO cannot be sintered without pressure is.
  • ITO can be sintered without pressure, so that even ceramic moldings on this simple Way can be made. This is especially true if aluminum oxide or zirconium dioxide is added.
  • the cutting tool can thus be made by the following procedure produce:
  • a homogeneous mixture is made from matrix ceramics, for example aluminum oxide or zirconium dioxide, and the electrically conductive oxide ceramic, for example ITO.
  • the oxides together with the corresponding organometallic Mixed liquid precursors is sprayed in the spray dryer. Thereby escapes the alcohol of the liquid precursors and granules are formed, which consist of the respective matrix ceramic and are homogeneous are covered with an organic ITO precursor.
  • the homogeneous mixed ceramic is created in air.
  • the blanks of the Cutting tools are then air to final density sintered.
  • the sintering temperatures are above 1000 ° C and up to 1600 ° C, but preferably from 1100 ° C to 1400 ° C.
  • the final geometric shape and thus the fine-tuning the characteristic of electrical resistance occurs by grinding after the sintering process.
  • An alternative way of production is through shaping Hot casting or low pressure injection molding.
  • the Plasticized powder by mixing with a wax mass.
  • the flowable mass produced in this way can be depressurized in Pour molds or take molds using low pressure injection molding.
  • the blade geometry plays a part in the behavior when cutting an important role. Firstly, the quality of the cutting edge, which can be achieved by appropriate grinding, for the type and location of the heat release is important to others.
  • FIGS 1, 2 and 3 show preferred configurations of the Blade.
  • Fig. 1 is a simple cutting tool with a homogeneous Mixed ceramics represented a uniform relationship of matrix ceramics and electrically conductive oxide ceramics.
  • the dimensionless numbers refer to Millimeter.
  • Fig. 2 shows the use of a gradient material Cutting edge.
  • the heat is about changing the specific Resistance generated within the tool.
  • the Cutting tool has a ground cutting edge that is at least Is 1 cm long.
  • the angle between the cutting edge and the Horizontal with the cutting tool in a vertical position should be between 30 and 50 °; in the example shown the angle is 40 °.
  • the mixed ceramic M1 has a lower one specific resistance than the mixed ceramic M2.
  • FIG. 3 shows a similar embodiment as shown in FIG. 2, where, however, a gradient mixing ceramic with a Cross-sectional change in the cutting edge is combined.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Compositions Of Oxide Ceramics (AREA)
  • Cutting Tools, Boring Holders, And Turrets (AREA)
  • Ceramic Products (AREA)
  • Turning (AREA)
  • Dry Shavers And Clippers (AREA)
  • Dicing (AREA)
EP04000670A 2003-04-12 2004-01-15 Outil de coupe chauffant Expired - Lifetime EP1466710B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10316916A DE10316916B4 (de) 2003-04-12 2003-04-12 Schneidwerkzeug und seine Verwendung
DE10316916 2003-04-12

Publications (3)

Publication Number Publication Date
EP1466710A2 true EP1466710A2 (fr) 2004-10-13
EP1466710A3 EP1466710A3 (fr) 2005-05-11
EP1466710B1 EP1466710B1 (fr) 2008-04-30

Family

ID=32864464

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04000670A Expired - Lifetime EP1466710B1 (fr) 2003-04-12 2004-01-15 Outil de coupe chauffant

Country Status (3)

Country Link
EP (1) EP1466710B1 (fr)
AT (1) ATE393688T1 (fr)
DE (2) DE10316916B4 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008022758A1 (de) 2007-05-09 2008-12-18 Michael Bader Mittels Verbundguss hergestellte Umform- und Trennwerkzeuge

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19545825A1 (de) * 1995-12-08 1997-06-12 Inocermic Ges Fuer Innovative Elektrisch heizbare Messer, Schneiden, Skalpelle, Schneid- und Schweißvorrichtungen
EP0812665A1 (fr) * 1995-03-02 1997-12-17 Terumo Kabushiki Kaisha Lame de coupe chauffee
DE19850366A1 (de) * 1997-10-31 1999-05-06 Ceram Tec Ag Innovative Cerami Plateletverstärkter Sinterformkörper
DE19752080A1 (de) * 1997-11-25 1999-07-29 Karlsruhe Forschzent Verfahren zur Herstellung eines mehrkomponentigen, oxidischen Keramikpulvers
DE10002232A1 (de) * 2000-01-20 2001-08-09 Karlsruhe Forschzent Verfahren zur Herstellung eines multinären keramischen Mischoxids

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4770673A (en) * 1987-10-09 1988-09-13 Corning Glass Works Ceramic cutting tool inserts

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0812665A1 (fr) * 1995-03-02 1997-12-17 Terumo Kabushiki Kaisha Lame de coupe chauffee
DE19545825A1 (de) * 1995-12-08 1997-06-12 Inocermic Ges Fuer Innovative Elektrisch heizbare Messer, Schneiden, Skalpelle, Schneid- und Schweißvorrichtungen
DE19850366A1 (de) * 1997-10-31 1999-05-06 Ceram Tec Ag Innovative Cerami Plateletverstärkter Sinterformkörper
DE19752080A1 (de) * 1997-11-25 1999-07-29 Karlsruhe Forschzent Verfahren zur Herstellung eines mehrkomponentigen, oxidischen Keramikpulvers
DE10002232A1 (de) * 2000-01-20 2001-08-09 Karlsruhe Forschzent Verfahren zur Herstellung eines multinären keramischen Mischoxids

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008022758A1 (de) 2007-05-09 2008-12-18 Michael Bader Mittels Verbundguss hergestellte Umform- und Trennwerkzeuge

Also Published As

Publication number Publication date
DE502004006978D1 (de) 2008-06-12
EP1466710A3 (fr) 2005-05-11
DE10316916B4 (de) 2005-09-08
DE10316916A1 (de) 2004-11-04
ATE393688T1 (de) 2008-05-15
EP1466710B1 (fr) 2008-04-30

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