EP0328732B1 - Verfahren zur Herstellung eines Formkörpers aus Metall durch Kaltfliesspressen - Google Patents

Verfahren zur Herstellung eines Formkörpers aus Metall durch Kaltfliesspressen Download PDF

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Publication number
EP0328732B1
EP0328732B1 EP88114986A EP88114986A EP0328732B1 EP 0328732 B1 EP0328732 B1 EP 0328732B1 EP 88114986 A EP88114986 A EP 88114986A EP 88114986 A EP88114986 A EP 88114986A EP 0328732 B1 EP0328732 B1 EP 0328732B1
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EP
European Patent Office
Prior art keywords
metal plate
die
small metal
polytetrafluoroethylene
metal
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.)
Expired - Lifetime
Application number
EP88114986A
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German (de)
English (en)
French (fr)
Other versions
EP0328732A1 (de
Inventor
Hans-Joachim Tüshaus
Michael Dr. Hörmann
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.)
WC Heraus GmbH and Co KG
Original Assignee
WC Heraus 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 WC Heraus GmbH and Co KG filed Critical WC Heraus GmbH and Co KG
Priority to AT88114986T priority Critical patent/ATE92546T1/de
Publication of EP0328732A1 publication Critical patent/EP0328732A1/de
Application granted granted Critical
Publication of EP0328732B1 publication Critical patent/EP0328732B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M107/00—Lubricating compositions characterised by the base-material being a macromolecular compound
    • C10M107/38—Lubricating compositions characterised by the base-material being a macromolecular compound containing halogen
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C23/00—Extruding metal; Impact extrusion
    • B21C23/32—Lubrication of metal being extruded or of dies, or the like, e.g. physical state of lubricant, location where lubricant is applied
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/02—Compacting only
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M103/00—Lubricating compositions characterised by the base-material being an inorganic material
    • C10M103/06—Metal compounds
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M111/00—Lubrication compositions characterised by the base-material being a mixture of two or more compounds covered by more than one of the main groups C10M101/00 - C10M109/00, each of these compounds being essential
    • C10M111/04—Lubrication compositions characterised by the base-material being a mixture of two or more compounds covered by more than one of the main groups C10M101/00 - C10M109/00, each of these compounds being essential at least one of them being a macromolecular organic compound
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/02—Compacting only
    • B22F2003/026—Mold wall lubrication or article surface lubrication
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
    • C10M2201/06—Metal compounds
    • C10M2201/0603—Metal compounds used as base material
    • C—CHEMISTRY; METALLURGY
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    • C10M2201/061—Carbides; Hydrides; Nitrides
    • C10M2201/0613—Carbides; Hydrides; Nitrides used as base material
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    • C10M2201/062—Oxides; Hydroxides; Carbonates or bicarbonates
    • C—CHEMISTRY; METALLURGY
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    • C10M2201/0623—Oxides; Hydroxides; Carbonates or bicarbonates used as base material
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    • C10M2201/0663—Molybdenum sulfide used as base material
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    • C10M2201/08—Inorganic acids or salts thereof
    • C10M2201/0803—Inorganic acids or salts thereof used as base material
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    • C10M2201/085—Phosphorus oxides, acids or salts
    • C10M2201/0853—Phosphorus oxides, acids or salts used as base material
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    • C10M2201/086—Chromium oxides, acids or salts
    • C10M2201/0863—Chromium oxides, acids or salts used as base material
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
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    • C10M2201/087—Boron oxides, acids or salts
    • C10M2201/0873—Boron oxides, acids or salts used as base material
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
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    • C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
    • C10M2201/10—Compounds containing silicon
    • C10M2201/1006—Compounds containing silicon used as base material
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    • C10M2201/102—Silicates
    • C10M2201/103—Clays; Mica; Zeolites
    • C10M2201/1033—Clays; Mica; Zeolites used as base material
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    • C10M2201/1053—Silica used as base material
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    • C10M2201/123—Glass used as base material
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    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2211/00—Organic non-macromolecular compounds containing halogen as ingredients in lubricant compositions
    • C10M2211/06—Perfluorinated compounds
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2213/00—Organic macromolecular compounds containing halogen as ingredients in lubricant compositions
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    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2213/00—Organic macromolecular compounds containing halogen as ingredients in lubricant compositions
    • C10M2213/02—Organic macromolecular compounds containing halogen as ingredients in lubricant compositions obtained from monomers containing carbon, hydrogen and halogen only
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    • C10M2213/00—Organic macromolecular compounds containing halogen as ingredients in lubricant compositions
    • C10M2213/02—Organic macromolecular compounds containing halogen as ingredients in lubricant compositions obtained from monomers containing carbon, hydrogen and halogen only
    • C10M2213/023—Organic macromolecular compounds containing halogen as ingredients in lubricant compositions obtained from monomers containing carbon, hydrogen and halogen only used as base material
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2213/00—Organic macromolecular compounds containing halogen as ingredients in lubricant compositions
    • C10M2213/04—Organic macromolecular compounds containing halogen as ingredients in lubricant compositions obtained from monomers containing carbon, hydrogen, halogen and oxygen
    • C10M2213/043—Organic macromolecular compounds containing halogen as ingredients in lubricant compositions obtained from monomers containing carbon, hydrogen, halogen and oxygen used as base material
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    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
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    • C10M2213/062—Polytetrafluoroethylene [PTFE]
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
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    • C10N2050/015—Dispersions of solid lubricants
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    • 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
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S72/00—Metal deforming
    • Y10S72/70—Deforming specified alloys or uncommon metal or bimetallic work

Definitions

  • the invention relates to a method for producing a shaped body from a metal from the group consisting of tantalum, niobium and a base alloy of one of these metals by cold extrusion using a fluorine-containing plastic as a lubricant.
  • Tantalum is known for cold forming, cold extrusion, the advantages of which can be seen in the low material loss.
  • the forming took place in four individual stages on a standing crank press.
  • tantalum has a strong tendency to weld under the high surface pressures involved in cold extrusion.
  • satisfactory results were not achieved with any of the proven lubricants, including PTFE coatings on the workpieces.
  • Sufficient results could only be achieved by combining several measures, which included the use of other materials for the active parts, their additional surface treatment, a surface treatment of the original shapes and their lubrication with a lubricant mixture. It is not described in detail what measures have been taken. In any case, an optimal solution was not achieved.
  • a coating agent for producing protective coatings with a low coefficient of friction is known. It consists of a dispersion of a low molecular weight fluorocarbon polymer and a thermosetting or thermoplastic resin, which can still contain a minor amount of a high molecular weight polytetrafluoroethylene.
  • the invention has for its object to optimize the production of a shaped body from a metal from the group of tantalum, niobium and a base alloy of one of these metals by cold extrusion.
  • this object is achieved for the process characterized at the outset by attaching a lubricant film to a metal plate which consists of an oxide layer of the metal in which low molecular weight polytetrafluoroethylene is embedded, or which consists of chlorotrifluoroethylene polymer, and then the metal plate by means of a hard metal Stamp is cold-formed in a single step to the molded body by backward extrusion, the stamp having a stamp head provided with a spherical bottom surface and rounded undercuts in the region of the transition from the stamp head to the stamp shaft.
  • the metal plate is anodically oxidized before being deformed, then sprayed with a solution containing polytetrafluoroethylene and the solvent is evaporated.
  • the polytetrafluoroethylene-containing solution is preferably sprayed onto a heated anodized metal plate which has been heated to a temperature of preferably 150 ° C. It has proven to be useful as a polytetrafluoroethylene-containing solution to use a dispersion of a finely divided, low molecular weight polytetrafluoroethylene and a thermoplastic resin dissolved in a resin solvent and to spray it onto the anodized, optionally heated, metal plate.
  • a stamp For stamping, a stamp has proven to be very useful, the crown crown of which lies in the range from 20 to 30 ⁇ m.
  • Such a material which consists of a cobalt matrix in which tungsten carbide is embedded, is used in particular as the material for the stamp.
  • plates with a diameter of 7 mm and a thickness of 6.5 mm are sheared off from a circular cylindrical tantalum rod.
  • a large number of platelets for example 2000 pieces, are placed in a commercially available ultrasonic cleaning system which uses a fluorine-chlorohydrocarbon, e.g. 1,1,2-trichloro-1,2,2-trifluoroethane.
  • This degreasing process is followed by vibratory grinding in a drum for about 12 hours. The grinding process takes place with the addition of water and the addition of ceramic grinding wheels.
  • the ground metal plates are then pressed in a closed die made of hard metal, whereby the dimensions of the metal plates are changed to about 9.6 mm in diameter by 3.6 mm in thickness.
  • This plan-pressing process step is followed by degreasing in the ultrasonic bath, as indicated above, and by a surface grinding, the surface grinding time being only about 8 hours.
  • the tantalum platelets prepared in this way are then subjected to recrystallization annealing in a high vacuum at about 10 ⁇ 5 mbar at a temperature of about 1350 ° C. for a period of about 1 hour.
  • the tantalum platelets After the tantalum platelets have cooled to room temperature, they are wetted with chlorotrifluoroethylene and placed in a hard metal die, in which they are cold-pressed into a bowl by means of the press ram in a single pressing step.
  • the crown of the press die head was 28 ⁇ m, and cobalt was used as the material for the press die, and tungsten carbide particles are embedded in its matrix.
  • the cups produced according to the invention had a base thickness of approximately 0.4 mm, a length of approximately 18 mm, an inner diameter of approximately 8.7 mm and an outer diameter of approximately 9.5 mm.
  • the bowls did not have to be reworked.
  • an oxide layer of the metal, in which low molecular weight polytetrafluoroethylene is embedded can also be used as the tribology system, as proposed.
  • the manufacture of this tribology system follows the recrystallization process step according to the example above.
  • the tantalum plate is immersed as an anode in a phosphoric acid solution for a period of between 15 and 30 minutes.
  • the oxidized tantalum platelets are then rinsed off with distilled water, and after drying, they are wetted with a solution containing polytetrafluoroethylene and the solvent is evaporated off at about 150.degree. This is followed by cold extrusion, as described above.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Forging (AREA)
  • Lubricants (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Extrusion Of Metal (AREA)
  • Powder Metallurgy (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)
EP88114986A 1988-02-13 1988-09-14 Verfahren zur Herstellung eines Formkörpers aus Metall durch Kaltfliesspressen Expired - Lifetime EP0328732B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88114986T ATE92546T1 (de) 1988-02-13 1988-09-14 Verfahren zur herstellung eines formkoerpers aus metall durch kaltfliesspressen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3804567 1988-02-13
DE3804567A DE3804567C1 (OSRAM) 1988-02-13 1988-02-13

Publications (2)

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EP0328732A1 EP0328732A1 (de) 1989-08-23
EP0328732B1 true EP0328732B1 (de) 1993-08-04

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EP88114986A Expired - Lifetime EP0328732B1 (de) 1988-02-13 1988-09-14 Verfahren zur Herstellung eines Formkörpers aus Metall durch Kaltfliesspressen

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Country Link
US (1) US4876868A (OSRAM)
EP (1) EP0328732B1 (OSRAM)
JP (1) JPH0729165B2 (OSRAM)
AT (1) ATE92546T1 (OSRAM)
DE (2) DE3804567C1 (OSRAM)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5013409A (en) * 1989-03-23 1991-05-07 Doug Czor Electrodeposition process
US5307660A (en) * 1992-08-06 1994-05-03 Acheson Industries, Inc. New water based lubricant composition for cold impact extrusion of spark plug bodies or other metal parts and process
EP0785830B1 (en) * 1994-10-13 1999-12-15 Luxfer Group Limited Backward extrusion method and product
US6142001A (en) * 1999-06-09 2000-11-07 The Boc Group, Inc. Cylindrical shell for use in gas cylinder fabrication
AR032233A1 (es) * 2002-01-09 2003-10-29 Maria Eugenia Barrera Un procedimiento para conformar un envase de alta resistencia, particularmente un envase para aerosoles y a un envase obtenido mediante dicho procedimiento
JP5325034B2 (ja) * 2009-07-08 2013-10-23 理研精工株式会社 ホイールナットレンチ並びにその製造方法
US9700925B2 (en) * 2015-11-04 2017-07-11 Vahid Shatermashhadi System and method for hydrostatic backward extrusion

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3293203A (en) * 1962-03-26 1966-12-20 Acheson Ind Inc Thermosettable resin compositions and method for forming low friction surface coatings
US3255621A (en) * 1963-08-16 1966-06-14 Haveg Industries Inc Lubrication
US3335073A (en) * 1963-12-27 1967-08-08 Gen Electric Method of making anodized tantalum foil
FR2067226A1 (OSRAM) * 1969-11-27 1971-08-20 Cefilac
DE2635342C2 (de) * 1976-08-03 1981-09-24 Mannesmann AG, 4000 Düsseldorf Presse zum Warmlochen eines Metallblockes
DD231928A3 (de) * 1983-12-16 1986-01-15 Eberhard Schlowag Ausbildung von werkzeug-/werkstueckgrenzflaechen und wirkfugen zum kaltmassivumformen von tantal
JPH05156760A (ja) * 1991-12-06 1993-06-22 Fuji Plant Kogyo Kk 屋根の除雪装置

Also Published As

Publication number Publication date
JPH01258837A (ja) 1989-10-16
ATE92546T1 (de) 1993-08-15
JPH0729165B2 (ja) 1995-04-05
EP0328732A1 (de) 1989-08-23
DE3804567C1 (OSRAM) 1989-05-11
DE3882963D1 (de) 1993-09-09
US4876868A (en) 1989-10-31

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