EP2140953A1 - Formschmiedeverfahren von Metallteilen - Google Patents

Formschmiedeverfahren von Metallteilen Download PDF

Info

Publication number
EP2140953A1
EP2140953A1 EP09164491A EP09164491A EP2140953A1 EP 2140953 A1 EP2140953 A1 EP 2140953A1 EP 09164491 A EP09164491 A EP 09164491A EP 09164491 A EP09164491 A EP 09164491A EP 2140953 A1 EP2140953 A1 EP 2140953A1
Authority
EP
European Patent Office
Prior art keywords
composition
stamping
gas
surfactant compound
lubricating composition
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
EP09164491A
Other languages
English (en)
French (fr)
Other versions
EP2140953A8 (de
EP2140953B1 (de
Inventor
Philippe Jeannerat
Christian Rothenbühler
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.)
Joseph Baume SA
Original Assignee
Joseph Baume SA
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 Joseph Baume SA filed Critical Joseph Baume SA
Publication of EP2140953A1 publication Critical patent/EP2140953A1/de
Publication of EP2140953A8 publication Critical patent/EP2140953A8/de
Application granted granted Critical
Publication of EP2140953B1 publication Critical patent/EP2140953B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/20—Deep-drawing
    • B21D22/201—Work-pieces; preparation of the work-pieces, e.g. lubricating, coating
    • 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
    • B21D37/18—Lubricating, e.g. lubricating tool and workpiece simultaneously
    • 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
    • C10M173/00—Lubricating compositions containing more than 10% water
    • C10M173/02—Lubricating compositions containing more than 10% water not containing mineral or fatty oils
    • 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
    • C10M2201/16—Carbon dioxide
    • 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
    • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
    • C10M2207/10—Carboxylix acids; Neutral salts thereof
    • 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
    • C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
    • C10M2209/10—Macromolecular compoundss obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • C10M2209/103—Polyethers, i.e. containing di- or higher polyoxyalkylene groups
    • C10M2209/104—Polyethers, i.e. containing di- or higher polyoxyalkylene groups of alkylene oxides containing two carbon atoms 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
    • C10M2219/00—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
    • C10M2219/04—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions containing sulfur-to-oxygen bonds, i.e. sulfones, sulfoxides
    • C10M2219/044—Sulfonic acids, Derivatives thereof, e.g. neutral salts
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2040/00—Specified use or application for which the lubricating composition is intended
    • C10N2040/20—Metal working
    • C10N2040/24—Metal working without essential removal of material, e.g. forming, gorging, drawing, pressing, stamping, rolling or extruding; Punching metal

Definitions

  • the present invention relates to a method of stamping metal parts.
  • stamping processes cold or hot, is common to achieve high quality metal parts, including having precise dimensions and a good surface.
  • a piece of metal or metal alloy is subjected to high pressure exerted by counter-matrices, possibly after having been preheated.
  • the dies are machined with great precision to guarantee the reliability of the result of stamping.
  • the surfaces of forgings or dies may be damaged.
  • the damage may be a change in the surface condition and a change in appearance of the parts, which are no longer usable.
  • damage requires at least a correction that takes time and can lead to high costs due to the cessation of production.
  • the graphite generally used in stamping processes is in the form of a colloidal suspension of very fine graphite particles, in aqueous phase or in concentrated ammonia.
  • the solution is sprayed on the dies of the press before the stamping operation to avoid the aforementioned damage.
  • the use of a lubricant on the dies facilitates extraction of the forging out of the dies. Indeed, if a piece remains stuck in one of the matrices, the damage can be much larger and require, for example, the completion of a new matrix, or both.
  • the main object of the present invention is to propose an alternative to the stamping methods currently used, by proposing a method that does not present a danger for the health of its users, and that is ecological.
  • Another object of the present invention is to provide a stamping process which ensures an immaculate appearance on the surface of the stamped metal or metal alloy.
  • the application of the lubricant composition obtained according to the invention to the parts before carrying out a stamping operation guarantees a good quality of the part obtained as well as its extraction from the dies.
  • the Applicant has unexpectedly found that injection of a gas in the lubricating composition in which the parts before stamping are quenched, provides a lubrication quality superior to that obtained with the methods of the state of the art.
  • the process according to the invention is distinguished by its absence of toxicity.
  • the lubricating composition comprises between 1 and 20%, preferably between 2 and 15%, and more preferably between 4 and 9%, by weight, of an anionic surfactant compound relative to its total mass, and less of 10%, preferably less than 5% and more preferably less than 2%, by weight, of an amphoteric or nonionic surfactant compound, based on its total mass.
  • any known surfactant meeting the criteria required for the practice of the present invention may be used. Those skilled in the art will not encounter any particular difficulty in selecting surfactants that meet their specific needs. Preferably, the surfactants retained will not be toxic to the users of the lubricant composition used according to the present invention and will have a high biodegradability.
  • alkyl sulphates alkylarylsulphates
  • Such compounds are 90% biodegradable.
  • composition just described is clean, from an environmental point of view, odorless and non-toxic.
  • the gas bubbling into the lubricating composition can be injected into the lubricant composition at a pressure of between 2 and 15 bar, preferably between 5 and 10 bar.
  • the gas used may preferably be carbon dioxide, but any other suitable gas may be used.
  • the lubricating composition can be prepared according to step a) in a bath, into which said gas is injected according to step b), the workpiece to be stamped then being dipped in said bath according to step c ).
  • a bath containing demineralised water, about 6% by weight of an anionic surfactant soap, and less than 2% by weight of a nonionic surfactant can be made.
  • Carbon dioxide is injected into the bath with a pressure of 5 bar.
  • the pieces placed in a basket are soaked in the bath and then stamped.
  • the parts obtained according to the process of the invention have a beautiful appearance and the stamping process does not present a danger to the health of its users.
  • the method according to the invention is more particularly applicable, by way of non-limiting indication, to the stamping of precious metal parts, of steel, of any type, stainless steel, brass, titanium or titanium alloy, of zirconium or zirconium alloy, tantalum or tantalum alloy, these components being commonly used for example in the manufacture of watch cases and other timepieces.
  • the skilled person can adapt the teaching of the present invention to the stamping of metals or alloys other than those mentioned without departing from the scope of the invention.
  • the process according to the invention mainly concerns cold processes.
  • the method according to the invention can also be advantageously used in a hot stamping process without departing from the scope of the present invention.
  • the part can be heated between 700 ° C and 1000 ° C.
  • the stamping of titanium alloy parts is usually carried out at a temperature between about 800 ° C and 920 ° C.
  • the first steps of the stamping method according to the present invention can be implemented in a simple manner, before stamping a part by applying a pressure on a piece, of volume and dimensions adapted to obtain this piece, through antagonistic matrices of a press.
  • the Applicant has found that the application of a lubricating composition on the dies, in combination with the application of the lubricant composition on the billet before proceeding to stamping, as described in the prior art, was not necessary to ensure a good quality surface finish.
  • the original color of the stamped part which is a function of its composition, is not affected by the stamping process in which the lubricant composition according to the present invention is applied to the parts.
  • parts stamped in this way have a better surface condition than those obtained by the processes of the prior art, insofar as the microcracks visible on the latter do not appear.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Forging (AREA)
  • Lubricants (AREA)
EP09164491A 2008-07-04 2009-07-03 Formschmiedeverfahren von Metallteilen Not-in-force EP2140953B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH01045/08A CH699084B1 (fr) 2008-07-04 2008-07-04 Procédé d'étampage de pièces métalliques.

Publications (3)

Publication Number Publication Date
EP2140953A1 true EP2140953A1 (de) 2010-01-06
EP2140953A8 EP2140953A8 (de) 2010-10-27
EP2140953B1 EP2140953B1 (de) 2011-12-28

Family

ID=41226291

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09164491A Not-in-force EP2140953B1 (de) 2008-07-04 2009-07-03 Formschmiedeverfahren von Metallteilen

Country Status (3)

Country Link
EP (1) EP2140953B1 (de)
AT (1) ATE538885T1 (de)
CH (1) CH699084B1 (de)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0407313A1 (de) * 1989-07-06 1991-01-09 Pechiney Rhenalu Verfahren zur Herstellung von Mehrschichtkörpern für das Tiefziehen oder Streckziehen von Hohlkörpern
US5249446A (en) * 1991-07-19 1993-10-05 Aluminum Company Of America Process for making an aluminum alloy finstock lubricated by a water-microemulsifiable composition
EP0489105B1 (de) * 1989-09-11 1994-06-22 Sollac Verfahren zur verbesserung der tiefziehbarkeit eines metallbleches oder eines metallblechnapfes
US5743121A (en) * 1996-05-31 1998-04-28 General Electric Company Reducible glass lubricants for metalworking
WO2004062836A2 (en) * 2003-01-09 2004-07-29 Henkel Kommanditgesellschaft Auf Aktien Lubricants suitable for hydroforming and other metal manipulating applications

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0407313A1 (de) * 1989-07-06 1991-01-09 Pechiney Rhenalu Verfahren zur Herstellung von Mehrschichtkörpern für das Tiefziehen oder Streckziehen von Hohlkörpern
EP0489105B1 (de) * 1989-09-11 1994-06-22 Sollac Verfahren zur verbesserung der tiefziehbarkeit eines metallbleches oder eines metallblechnapfes
US5249446A (en) * 1991-07-19 1993-10-05 Aluminum Company Of America Process for making an aluminum alloy finstock lubricated by a water-microemulsifiable composition
US5743121A (en) * 1996-05-31 1998-04-28 General Electric Company Reducible glass lubricants for metalworking
WO2004062836A2 (en) * 2003-01-09 2004-07-29 Henkel Kommanditgesellschaft Auf Aktien Lubricants suitable for hydroforming and other metal manipulating applications

Also Published As

Publication number Publication date
ATE538885T1 (de) 2012-01-15
CH699084A2 (fr) 2010-01-15
EP2140953A8 (de) 2010-10-27
CH699084B1 (fr) 2010-04-15
EP2140953B1 (de) 2011-12-28

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