WO2003039779A1 - Outil en plastique - Google Patents

Outil en plastique Download PDF

Info

Publication number
WO2003039779A1
WO2003039779A1 PCT/EP2002/012388 EP0212388W WO03039779A1 WO 2003039779 A1 WO2003039779 A1 WO 2003039779A1 EP 0212388 W EP0212388 W EP 0212388W WO 03039779 A1 WO03039779 A1 WO 03039779A1
Authority
WO
WIPO (PCT)
Prior art keywords
tool
plastic
aluminum
tool according
deep
Prior art date
Application number
PCT/EP2002/012388
Other languages
German (de)
English (en)
Inventor
Mohamed Mekkaoui Alaoui
Jürgen VOSSBERG
Peter Hochwald
Original Assignee
Huntsman Advanced Materials (Switzerland) 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 Huntsman Advanced Materials (Switzerland) Gmbh filed Critical Huntsman Advanced Materials (Switzerland) Gmbh
Priority to US10/494,916 priority Critical patent/US20050044925A1/en
Priority to DE50206046T priority patent/DE50206046D1/de
Priority to JP2003541661A priority patent/JP2005507781A/ja
Priority to EP02783074A priority patent/EP1448325B1/fr
Publication of WO2003039779A1 publication Critical patent/WO2003039779A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D37/00—Tools as parts of machines covered by this subclass
    • B21D37/01—Selection of materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/20—Deep-drawing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D37/00—Tools as parts of machines covered by this subclass
    • B21D37/20—Making tools by operations not covered by a single other subclass

Definitions

  • the present invention relates to a tool consisting of plastic and a material embedded in the plastic with sliding properties.
  • Tools in the sense of the present invention are, in particular, forming tools, for example deep-drawing tools for forming components made of metal, for example automotive components.
  • plastics have also been used as tooling materials, e.g. B. plastics containing metallic fillers. These plastics have the advantage that they are cheaper materials. However, it could be determined that such plastic-based tools cannot be used or can only be used to a limited extent in certain applications for forming tools. This applies in particular to applications in the deep-drawing area, in which workpieces have to be formed in large numbers, so that the tool is subject to high wear. Tools made of plastics also have insufficient compressive strength in these applications.
  • the object of the invention is to provide a plastic tool which on the one hand has good sliding properties and on the other hand also has improved wear properties and a high compressive strength.
  • the plastic tool contains a proportion of embedded aluminum in order to achieve increased pressure resistance and wear resistance, as well as an incorporated material with sliding properties, so that the tool has a quasi self-lubricating effect.
  • graphite or molybdenum sulfide can be considered as a material with sliding properties.
  • the use of graphite powder is particularly preferred.
  • the aluminum can be contained in the plastic tool as a filler, for example in the form of aluminum powder or aluminum particles with a larger grain size. Tools of this type can preferably be produced from an appropriately composed casting resin or from a block material.
  • the tool contains a weight fraction of more than about 50% of aluminum filler.
  • the proportion by weight of aluminum filler in the plastic mass for producing the tool can be a multiple of the proportion of plastic.
  • This weight fraction is preferably at least about 60%, preferably about 70%, of aluminum filler, preferably of aluminum powder, based on the total weight of the plastic composition.
  • the proportion by weight of the material embedded in the plastic with sliding properties is generally less than the proportion of plastic and / or the proportion of aluminum in the mass of plastic.
  • the tool contains a weight fraction of at least about 20% to about 50% graphite powder based on the weight fraction of the plastic contained in the tool, i. that is, not based on the total weight of the plastic mass, but based on the pure plastic content.
  • the proportion by weight of graphite based on the total weight of the material from which the tool is made is preferably at least about 3% to about 15% of graphite.
  • the weight ratio between the graphite portion and the aluminum portion is preferably between about 1:15 and about 1: 6.
  • tools for forming operations in particular deep-drawing tools made of the plastic composition of the type mentioned.
  • these can be punches or sheet metal holders for deep-drawing metal parts.
  • z. B. a metal sheet which is claimed perpendicular to the direction of movement of the deep-drawing tool in a pulling direction, particles, in particular filler particles, are torn out of the plastic matrix and cracks thereby arise in the tool.
  • graphite in the form of graphite powder can be embedded in the plastic as a material with sliding properties.
  • the use of graphite powder with a grain size of between approximately 50 ⁇ m and approximately 250 ⁇ m has proven to be particularly advantageous.
  • the tools according to the invention can essentially consist entirely of a plastic with the above-mentioned inclusions, that is to say that they consist entirely of a homogeneous plastic material and thus differ from the tools according to the aforementioned DE 93 18 272.4 U1, where only a front layer referred to as a guide part the tool consists of a plastic with certain sliding properties.
  • FIG. 1 shows a highly schematically simplified perspective illustration to explain a deep-drawing process by means of a tool according to the invention
  • FIG. 2 shows a second schematically simplified view in section to explain the deep-drawing process
  • FIG. 3 shows a diagram which shows the change in the modulus of elasticity when using plastics with different fillers
  • FIG. 5 shows the associated die for the deep drawing of valve covers with a stamp according to FIG. 4;
  • FIG. 1 shows a highly schematically simplified perspective illustration of an arrangement of tools for deep drawing a sheet metal part 10.
  • An upper tool part 11 is provided for forming the sheet metal part 10 in the deep drawing process, and a lower tool part 12 in the form of a die receiving the upper tool part 11.
  • the upper tool part 11 consists of a Plastic of the type according to the invention, which contains embedded aluminum particles 13, and embedded graphite powder 14 to achieve a self-lubricating effect when the sheet metal part 10 is formed.
  • the upper tool part 11 was produced from a casting resin consisting of plastic, aluminum powder as a filler and graphite powder. 1 kg of plastic, 3 kg of aluminum powder and 200 g of graphite powder were used for a total mass of 4.2 kg of this material. The grain size of the graphite powder varied between 50 and 250 ⁇ m.
  • the plastic tool had very good lubricating properties and a 40% higher compressive strength. The cracking that occurs in the front layer of the tool in the case of tools made of other plastics with conventional fillers such as sand and iron, which occurs because filling particles are torn out of the basic matrix of the plastic material during the deep-drawing process, did not occur when using tools made of the plastic according to the invention.
  • the deep-drawing tools produced from the plastic material mentioned are suitable for forming workpieces in large numbers, for example up to 100,000.00 or more.
  • FIG. 2 illustrates the forces acting on the above-mentioned crack formation during deep drawing with materials without a sufficient lubricating effect on the tool. It is shown in a highly schematically simplified sectional view of an upper tool part 11, which was produced according to the invention from solid casting material consisting of a plastic according to the invention with aluminum and graphite powder as fillers.
  • the lower tool part 15 was also cast from the plastic material according to the invention.
  • the sheet metal part 10 to be formed is located in the gap 16 between the upper tool part 11 and the lower tool part 15 before the deep-drawing process begins. During deep drawing, the sheet metal part 10 to be formed is deformed, with forces occurring in the direction of arrow 17 perpendicular to the direction of movement.
  • the front surfaces 18, 19 of the two tools 11, 15 are subjected to shear stress.
  • the graphite powder embedded in the plastic of the tools 11, 15 ensures a lubricating effect and good sliding properties in the border area between the front surfaces 18, 19, the tools 11, 15 and the drawn sheet metal part 10.
  • FIG. 3 illustrates the percentage change in the modulus of elasticity of tools made of different plastics, which was determined on the basis of pressure tests within the scope of the invention. This was shown in the diagram in column 20 on the far left The modulus of elasticity of a plastic that is only filled with aluminum is shown and assumed as the relative reference value for the other plastics with the value 100. In the second column labeled 22 from the right, the relative value of the elastic modulus for an aluminum-filled PTFE is shown, which, as can be seen, only a good 60% of that in FIG.
  • FIG. 3 reached plastic shown in column 20.
  • the elasticity modules for two plastics produced according to the invention are shown in FIG.
  • the column 23 on the far right in the illustration shows the value for a plastic filled with aluminum and MoS 2 as a sliding material. It can be seen that the modulus of elasticity is over 20% higher than that of the plastic filled with aluminum according to column 20.
  • column 21 (second from the left in the illustration) is the relative value of the modulus of elasticity for one with graphite and Rendered aluminum filled plastic. As can be seen from the illustration, this value is 40% higher than the modulus of elasticity for a plastic that is only filled with aluminum according to column 20 on the far left in the illustration.
  • the value shown in column 21 in FIG. 3 was achieved by adding 20% graphite powder to an aluminum-filled plastic for which the value in column 20 is shown.
  • FIG. 4 shows the deep-drawing stamp for valve cover 30 made of a plastic according to the invention from the underside. Deep drawing tests were carried out with this tool 30. Based on these tests, it was found that both the dimensional accuracy, the service life and the self-lubricating effect improved significantly compared to tools made of other plastics. Tools made from conventional plastics were worn out after a short time. By embedding only about 20% of graphite powder in a plastic filled with aluminum powder, considerably better friction and wear conditions were achieved with the tool 30 shown in FIG. As can be seen in FIG. 4, the deep-drawing stamp has two characteristic shaping elements 31, 32 for producing the depressions or raised areas typical of the shape of the valve cover.
  • FIG. 6 shows exemplary valve covers with different materials, which are produced by means of the in FIG.
  • valve covers 40, 41, 42 shown in FIG. 6 were produced by reshaping titanium sheet, aluminum sheet and galvanized steel sheet each in a material thickness of 1 mm.
  • the characteristic shaping regions namely the flat cylindrical recess 43 (or elevation if one looks from the underside at the deep-drawn valve cover 41 according to FIG. 6) can be seen in the representation according to FIG.
  • This Forming area 43 can be assigned to the forming element 32 of the deep-drawing tool 30 according to FIG. 4.
  • the forming area 44 can accordingly be assigned to the forming element 31 of the deep-drawing tool 30 according to FIG. 4.
  • FIG. 5 shows the die 50 associated with the deep-drawing die 30 according to FIG. 4 for the production of valve covers 40, 41, 42, as shown in FIG. 6.
  • the punch 30 is lowered into the deep-drawing die 50 shown in FIG. 5 shows the approximately rectangular shape of the die 50 corresponding to the punch 30 and rounded at the corner areas.
  • the deformed area 51 assigned to the approximately cylindrical forming element 32 can be seen as a depression in the deep-drawing tool serving as the die 50.
  • the die 50 according to FIG. 5 was also produced from the plastic according to the invention containing aluminum and graphite powder.
  • plastic tools made from the materials according to the invention compared to conventional steel tools lie in the material costs, for example, which are up to about 70% lower.
  • the plastics used for the production of the tools are easier to process and as a result the mechanical use in the production of the tools is lower.
  • the energy and power requirements in machine work for the manufacture of the tools can be z. B. reduce by 65%.
  • the training period is also up to 60% shorter, for example, than with steel tools.
  • the use of plastics according to the invention for the manufacture of the tools leads to a considerable weight reduction of, for example, up to 60% and thus to a lower load on the crane systems.
  • the tools can be changed more flexibly and cost-effectively, which in turn saves a lot of money, time and energy.
  • the tools are also suitable for recycling since they can be completely reused as fillers for the production of new plastic tools, which means that there are no disposal costs.
  • the elastic behavior of the plastics leads to an increase in the quality of the formed workpieces.
  • Embedding graphite in the plastic of the tools creates a self-lubricating effect on the contact layers of the tool. If it is still necessary to use liquid lubricants during the forming process, then the amount of lubricants required can be reduced significantly, for example by approx. 3 g / m 2 .
  • the friction conditions at Deep drawing is improved by introducing graphite powder into the plastic. The elimination or reduction of liquid lubricants during deep drawing significantly reduces pollution in the work area and thus relieves the environment.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Manufacture Of Alloys Or Alloy Compounds (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Mounting, Exchange, And Manufacturing Of Dies (AREA)
  • Lubricants (AREA)

Abstract

L'invention concerne des outils (11, 12) constitués d'une matière plastique ainsi que d'un matériau inséré dans cette matière plastique et présentant des propriétés de glisse. Ces outils en plastique comprennent en outre une insertion d'aluminium. Les outils en plastique selon l'invention sont conçus pour le formage, en particulier pour l'emboutissage de pièces métalliques (10), telles que des composants de véhicules automobiles. Ces outils présentent une résistance élevée à la pression et à l'usure et permettent d'effectuer un processus d'emboutissage avec des quantités sensiblement réduites ou nulles de lubrifiants en raison de leurs propriétés de glisse.
PCT/EP2002/012388 2001-11-09 2002-11-06 Outil en plastique WO2003039779A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US10/494,916 US20050044925A1 (en) 2001-11-09 2002-11-06 Tool made from plastic
DE50206046T DE50206046D1 (de) 2001-11-09 2002-11-06 Umformwerkzeug aus kunststoff
JP2003541661A JP2005507781A (ja) 2001-11-09 2002-11-06 プラスチック製工具
EP02783074A EP1448325B1 (fr) 2001-11-09 2002-11-06 Outil de formage en plastique

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10155233A DE10155233A1 (de) 2001-11-09 2001-11-09 Werkzeug aus Kunststoff
DE10155233.5 2001-11-09

Publications (1)

Publication Number Publication Date
WO2003039779A1 true WO2003039779A1 (fr) 2003-05-15

Family

ID=7705292

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2002/012388 WO2003039779A1 (fr) 2001-11-09 2002-11-06 Outil en plastique

Country Status (5)

Country Link
US (1) US20050044925A1 (fr)
EP (1) EP1448325B1 (fr)
JP (1) JP2005507781A (fr)
DE (2) DE10155233A1 (fr)
WO (1) WO2003039779A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2072205A1 (fr) 2007-12-17 2009-06-24 Rovalma SA Procédé pour la fabrication de pièces à demande mécanique élevée et en particulier des outils à partir de céramique ou polymères de faible coût

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6145537B1 (ja) * 2015-06-19 2017-06-14 中辻金型工業株式会社 金属製のプレス成形体の製造方法
DE102016213375B4 (de) * 2016-07-21 2022-10-13 Audi Ag Verfahren zum Herstellen eines Metallbearbeitungswerkzeugs und Metallbearbeitungswerkzeug

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1910705A1 (de) * 1969-03-03 1970-09-17 Wittmoser Dr Ing Adalbert Werkzeuge zur Herstellung von Teilen aus Kunststoffschaeumen
DE9318272U1 (de) * 1993-11-30 1994-02-17 Schuler Kunststofftechnik Gmbh Werkzeug für die spanlose Verformung von Werkstücken
EP0694353A2 (fr) * 1991-02-12 1996-01-31 Hughes Aircraft Company Outillage de matricage améliorée pour l'usinage de métal
DE19807404A1 (de) * 1998-02-21 1999-08-26 Hortig Tief- und Streckziehwerkzeug mit durch konturgetreu geformte Masken abgedeckten Funktionsflächen und Verfahren zu seiner Herstellung

Family Cites Families (8)

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Publication number Priority date Publication date Assignee Title
DE945745C (de) * 1950-09-19 1956-07-19 British Insulated Callenders Ziehmatrize fuer das fortlaufende Ziehen von Halbzeug, z.B. in Form von Streifen oder Rohren, aus Aluminium oder stark aluminiumhaltigem Metall
US3088174A (en) * 1959-01-28 1963-05-07 Gen Motors Corp Method of producing a reinforced plastic die
US3631745A (en) * 1967-07-06 1972-01-04 Lockheed Aircraft Corp Method of fabricating metal dies
US3803279A (en) * 1968-05-13 1974-04-09 J Bailey Method of making high temperature plastic-ceramic castable
US3876389A (en) * 1970-06-30 1975-04-08 Ibm Composite material, inclusions thereof, and method therefor
DE4022785A1 (de) * 1990-07-18 1992-01-23 Philips Patentverwaltung Verfahren zur herstellung von reibungsarmen, kohlenstoff enthaltenden schichten
US5743185A (en) * 1995-01-17 1998-04-28 Mattel, Inc. Flexible thermally conductive stamp and material
DE19825223C2 (de) * 1998-06-05 2000-11-30 Fraunhofer Ges Forschung Formwerkzeug und Verfahren zu dessen Herstellung

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1910705A1 (de) * 1969-03-03 1970-09-17 Wittmoser Dr Ing Adalbert Werkzeuge zur Herstellung von Teilen aus Kunststoffschaeumen
EP0694353A2 (fr) * 1991-02-12 1996-01-31 Hughes Aircraft Company Outillage de matricage améliorée pour l'usinage de métal
DE9318272U1 (de) * 1993-11-30 1994-02-17 Schuler Kunststofftechnik Gmbh Werkzeug für die spanlose Verformung von Werkstücken
DE19807404A1 (de) * 1998-02-21 1999-08-26 Hortig Tief- und Streckziehwerkzeug mit durch konturgetreu geformte Masken abgedeckten Funktionsflächen und Verfahren zu seiner Herstellung

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2072205A1 (fr) 2007-12-17 2009-06-24 Rovalma SA Procédé pour la fabrication de pièces à demande mécanique élevée et en particulier des outils à partir de céramique ou polymères de faible coût
US8283026B2 (en) 2007-12-17 2012-10-09 Rovalma, S.A. Method for producing highly mechanically demanded pieces and specially tools from low cost ceramics or polymers

Also Published As

Publication number Publication date
US20050044925A1 (en) 2005-03-03
JP2005507781A (ja) 2005-03-24
EP1448325A1 (fr) 2004-08-25
DE10155233A1 (de) 2003-05-22
DE50206046D1 (de) 2006-05-04
EP1448325B1 (fr) 2006-03-08

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