EP1557241B1 - Procédé de traitement de pièces en aluminium coulé - Google Patents

Procédé de traitement de pièces en aluminium coulé Download PDF

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Publication number
EP1557241B1
EP1557241B1 EP20040024901 EP04024901A EP1557241B1 EP 1557241 B1 EP1557241 B1 EP 1557241B1 EP 20040024901 EP20040024901 EP 20040024901 EP 04024901 A EP04024901 A EP 04024901A EP 1557241 B1 EP1557241 B1 EP 1557241B1
Authority
EP
European Patent Office
Prior art keywords
aluminium castings
castings
blasting
treated
aluminium
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.)
Not-in-force
Application number
EP20040024901
Other languages
German (de)
English (en)
Other versions
EP1557241A1 (fr
Inventor
Marc Lösken
Olaf Heine
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.)
Dr Ing HCF Porsche AG
Original Assignee
Dr Ing HCF Porsche AG
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 Dr Ing HCF Porsche AG filed Critical Dr Ing HCF Porsche AG
Publication of EP1557241A1 publication Critical patent/EP1557241A1/fr
Application granted granted Critical
Publication of EP1557241B1 publication Critical patent/EP1557241B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C11/00—Selection of abrasive materials or additives for abrasive blasts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C7/00—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts
    • B24C7/0046—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts the abrasive material being fed in a gaseous carrier
    • B24C7/0053—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts the abrasive material being fed in a gaseous carrier with control of feed parameters, e.g. feed rate of abrasive material or carrier
    • B24C7/0061—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts the abrasive material being fed in a gaseous carrier with control of feed parameters, e.g. feed rate of abrasive material or carrier of feed pressure

Definitions

  • the invention relates to a method for the treatment of aluminum castings according to the preamble of patent claim 1.
  • Aluminum castings such as those used as a cylinder crankcase, cylinder head or the like.
  • a method for compressed air jetting is treated, wherein a granular blasting agent is conveyed by a carrying air flow, and accelerated - main stream - and for wetting the blasting agent by means of an additional air flow in this main stream, a liquid, in particular water is introduced in a distributed form.
  • the US-A-5 081 799 describes a device for irradiating a workpiece with a mixture of fine particles and compressed air. It is proposed for the removal of coatings of aluminum surfaces, the compressed air to add inorganic salts.
  • the advantages achieved by the invention are to be seen in the fact that the treatment of aluminum castings by dry blasting in the low pressure range -7 bar leads to good quality surfaces on said aluminum castings.
  • the compressed air is a mixture of salt crystals - potassium sulfate and soda - added, whereby a liberation of these surfaces of particles in a thorough, but gentle manner, with an abrasive effect.
  • the aluminum castings are then treated excellently when steps 1 through 7 are applied.
  • An internal combustion engine 1 includes aluminum castings 2 and 3 each having an outside As and an inside Is formed by a cylinder crankcase and a cylinder head. Other aluminum castings of the internal combustion engine 1 are a valve cover 4, a crankshaft bearing bridge 5 and an oil pan 6. On the internal combustion engine 1, a crankshaft 7 and camshafts 8 and 9 are also provided.
  • a method is used in which first the outside As is freed with a dry blasting and then the inside Is of said aluminum castings 2 and 3 with the same dry blasting of particles become.
  • compressed air is applied at high speed to the outside As or the inside Is of the aluminum die-cast parts 2 and 3, by means of a jet device 10, which operates at a pressure of 7 bar. Impact, deposits, corrosion and color are removed from aluminum castings 2 and 3 by the impact energy of dry blasting.
  • a beam angle ⁇ between the blasting device 10 and the surfaces for firmly adhering particles are 80 ° to 90 °; for loose lacquer layers or other easily adhered layers flatter angles, so that the blasting medium can penetrate under the particulate material and it breaks loose.
  • the dry blast air is mixed with a mixture of salt crystals containing potassium sulphate - K2SO4 - and soda - Na2C03 -, the potassium having abrasive action.
  • an alkaline immersion bath can be used in the 5th step, with turbulence being generated in the immersion bath to remove particles from the aluminum castings 2 and 3.
  • turbulence being generated in the immersion bath to remove particles from the aluminum castings 2 and 3.
  • desalted water to the rinsing bath, to which liquid preservation can also be added.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)

Claims (4)

  1. Procédé de traitement de pièces moulées en aluminium, de préférence pour des moteurs à combustion interne, dans lequel les pièces moulées en aluminium sont usinées par sablage, les pièces moulées en aluminium (2 et 3) étant traitées par sablage à sec dans la plage de basse pression et un mélange de cristaux de sel étant ajouté à l'air comprimé de manière à éliminer une couche d'oxyde et les impuretés se trouvant en dessous et la corrosion sans enlèvement de matière, caractérisé en ce que le procédé comprend les étapes suivantes, dans l'ordre suivant :
    1ère étape : les pièces moulées en aluminium (2 et 3) sont traitées sur leurs côtés extérieurs (As) par sablage à sec, un mélange de sulfate de potassium (K2S04) et de soude (Na2CO3) étant ajouté à l'agent de sablage à sec,
    2ème étape : les pièces moulées en aluminium (2 et 3) sont alimentées par l'utilisation d'air comprimé,
    3ème étape : les pièces moulées en aluminium (2 et 3) sont traitées sur leurs côtés intérieurs (Is) par sablage à sec, une soude à grains fins étant ajoutée au sablage à sec,
    4ème étape: les pièces moulées en aluminium (2 et 3) sont débarrassées de l'agent de sablage à l'aide d'un rinçage, par exemple avec de l'acide citrique,
    5ème étape : les pièces moulées en aluminium (2 et 3) sont débarrassées des particules dans un bain d'immersion,
    6ème étape: les pièces moulées en aluminium (2 et 3) sont immergées dans un bain de rinçage,
    7ème étape : les pièces moulées en aluminium (2 et 3) sont traitées à l'aide d'un processus de séchage.
  2. Procédé selon la revendication 1, caractérisé en ce que le sablage à sec est réalisé avec une pression atteignant 7 bars.
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce que, au cours de la 5ème étape, le bain d'immersion est de type alcalin, des turbulences étant générées dans le bain d'immersion pour éliminer les particules des pièces moulées en aluminium (2 et 3).
  4. Procédé selon la revendication 1 ou 2, caractérisé en ce que, au cours de la 6ème étape, le bain de rinçage contient de l'eau déminéralisée à laquelle un agent de conservation liquide est ajouté.
EP20040024901 2004-01-23 2004-10-20 Procédé de traitement de pièces en aluminium coulé Not-in-force EP1557241B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004003420 2004-01-23
DE200410003420 DE102004003420B4 (de) 2004-01-23 2004-01-23 Verfahren zur Behandlung von Aluminiumgussteilen

Publications (2)

Publication Number Publication Date
EP1557241A1 EP1557241A1 (fr) 2005-07-27
EP1557241B1 true EP1557241B1 (fr) 2007-07-25

Family

ID=34625765

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20040024901 Not-in-force EP1557241B1 (fr) 2004-01-23 2004-10-20 Procédé de traitement de pièces en aluminium coulé

Country Status (2)

Country Link
EP (1) EP1557241B1 (fr)
DE (2) DE102004003420B4 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB201306986D0 (en) * 2013-04-17 2013-05-29 Crown Packaging Technology Inc Can production process

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5081799A (en) * 1990-04-06 1992-01-21 Church & Dwight Co., Inc. Blasting apparatus
DE4127886C2 (de) * 1991-08-22 1994-11-03 Pro Aqua Geraete Gmbh Strahlkopf
US5232514A (en) * 1991-10-10 1993-08-03 Church & Dwight Co., Inc. Corrosion-inhibiting cleaning systems for aluminum surfaces, particularly aluminum aircraft surfaces
DE4303339C2 (de) * 1993-02-05 1995-03-30 Ritter Aluminium Giesserei Gmb Verfahren zur Behandlung von Aluminiumdruckgußteilen
US5681205A (en) * 1993-08-12 1997-10-28 Church & Dwight Co., Inc. Method of using abrasive blast media containing corrosion inhibitor
JP2000343435A (ja) * 1999-03-29 2000-12-12 Asahi Glass Co Ltd ブラストメディア及びブラスト方法
DE10237402A1 (de) * 2002-08-09 2004-02-26 Elferink, geb. Zimmermann, Frank Thomas Christoph Verfahren zum Erzeugen einer Partikelströmung aus feinkörnigen Teilchen in einem Gasstrom, Anwendung des Verfahrens zur Erzeugung eines Schleuderstrahles und Strahlpistole zur Formierung eines Schleuderstrahles
US20040173767A1 (en) * 2003-03-03 2004-09-09 Rod Caskey Non-destructive media flow control valve

Also Published As

Publication number Publication date
DE102004003420A1 (de) 2005-08-18
EP1557241A1 (fr) 2005-07-27
DE102004003420B4 (de) 2006-10-26
DE502004004425D1 (de) 2007-09-06

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