EP1557223B1 - 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
EP1557223B1
EP1557223B1 EP20040024902 EP04024902A EP1557223B1 EP 1557223 B1 EP1557223 B1 EP 1557223B1 EP 20040024902 EP20040024902 EP 20040024902 EP 04024902 A EP04024902 A EP 04024902A EP 1557223 B1 EP1557223 B1 EP 1557223B1
Authority
EP
European Patent Office
Prior art keywords
cast aluminium
aluminium parts
process according
pressure wet
wet blasting
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
EP20040024902
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German (de)
English (en)
Other versions
EP1557223A1 (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 EP1557223A1 publication Critical patent/EP1557223A1/fr
Application granted granted Critical
Publication of EP1557223B1 publication Critical patent/EP1557223B1/fr
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
    • 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
    • B24C7/0076—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 the blasting medium being a liquid stream
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
    • B08B3/02—Cleaning by the force of jets or sprays
    • 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
    • B24C7/0007—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts the abrasive material being fed in a liquid carrier

Definitions

  • the invention relates to a method for the treatment of aluminum castings according to the preamble of patent claim 1.
  • From the DE 43 03 339 C2 discloses a method for treating aluminum die cast parts prior to the application of a porous catalytic coating. These castings are degreased, subjected to blasting and provided in deionized water at temperatures between 90 ° and 100 ° C in 0.5 to 1 hour with a 0.5 to 1Nm thick boehmite layer.
  • the DE 198 47 063 A1 deals with a method for cleaning automotive parts with corroded and / or contaminated by burned oil and grease residues surfaces.
  • the motor vehicle parts are processed in multiple stages, such that the pre- and / or basic cleaning is done by a vibratory finishing process and the finishing by high-pressure water.
  • the US 5,588,901 deals with the supply of sodium bicarbonate particles to a jet nozzle, using compressed air or water to bring these particles into contact with a surface to be cleaned.
  • the US 5,681,205 which is considered to represent the closest prior art to the subject-matter of claim 1 describes the cleaning of a metal surface by irradiation with a wet agent containing sodium bicarbonate and a corrosion inhibitor as the abrasive agent.
  • the object of the invention is to provide a method for the treatment of aluminum castings, preferably for internal combustion engines, through which the surfaces of these aluminum castings receive a high quality level.
  • the main advantages achieved by the invention can be seen in the fact that the treatment of the aluminum castings by means of the first and the second high pressure wet blasting to high quality surfaces on said aluminum castings, the latter is still supported by targeted rinsing, preserving and drying.
  • the applied method largely prevents residual particles of the aluminum castings from causing malfunctions.
  • the medium that is used for the first high-pressure wet blasting consists of a mixture of water and salt crystals, for example potassium sulfate and soda, which act in an abrasive manner on the surfaces of the aluminum castings. In other words, by gently removing oxide layers, pronounced soiling and deep-seated efflorescence are eliminated, but without causing material removal or damage.
  • the second high-pressure wet blasting in which water is used without the addition of solid media, insides of the aluminum castings of oil-grease residues and the sealing surfaces of deposits e.g. made of silicone.
  • the remaining blasting agent residues are dissolved by an aqueous blasting process of the aluminum castings, wherein the medium used here will add a liquid preservative.
  • the aluminum castings are put into a final state by drying by means of a suitable device which can be operated with compressed air but avoiding drying spots. After all, the media for high-pressure wet blasting because natural products can be easily disposed of
  • 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 treated with a first high-pressure wet-blasting and then the inside Is by means of a second high-pressure wet blasting, this second High-pressure wet blasting without the addition of solid media. Following this, the cast aluminum parts are rinsed, preserved and dried.
  • a medium of a mixture of water and salt crystals is used, for which potassium sulfate - K 2 SO 4 - and coarse-grained soda - Na 2 CO 3 - are used.
  • the media potassium sulfate and soda can be fed dry or as a slurry, and The water, which is irradiated under high pressure up to 1000 bar, a suitable rust inhibitor can be added.
  • an aqueous jet process is used, in which blasting process the water can be added a liquid preservative. It is also conceivable in this context that after rinsing the aluminum castings 2 and 3 are introduced into an immersion bath.
  • the method can be further improved if, after rinsing and preserving the aluminum castings 2 and 3, they are introduced into a dipping bath Tb

Landscapes

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

Claims (8)

  1. Procédé de traitement de pièces coulées en aluminium (2, 3) qui présentent un côté extérieur (As) et un côté intérieur (Is), de préférence pour moteurs à combustion interne (1), et dans lequel les pièces coulées en aluminium (2, 3) sont traitées par projection, le côté extérieur (As) des pièces coulées en aluminium (2, 3) étant d'abord traité par une première projection humide à haute pression et le côté intérieur (Is) des pièces coulées en aluminium (2, 3) étant ensuite traité par une deuxième projection humide sous haute pression, les pièces coulées en aluminium (2 et 3) étant ensuite rincées, soumises à un traitement de conservation et séchées, la première projection humide sous haute pression utilisant un fluide constitué d'un mélange d'eau et de cristaux de sel.
  2. Procédé selon la revendication 1, caractérisé en ce que le mélange du fluide contient du sulfate de potassium et de la soude.
  3. Procédé selon la revendication 1, caractérisé en ce que pour la deuxième projection humide sous haute pression, on utilise de l'eau non additionnée de substances solides.
  4. Procédé selon la revendication 1, caractérisé en ce que pour rincer les pièces coulées en aluminium (2, 3), on utilise une opération de projection d'eau.
  5. Procédé selon la revendication 4, caractérisé en ce que l'on ajoute un agent liquide de conservation au fluide de l'opération de projection.
  6. Procédé selon les revendications 4 et 5,
    caractérisé en ce que les pièces coulées en aluminium sont placées dans un bain d'immersion après le rinçage et le traitement de conservation.
  7. Procédé selon la revendication 1, caractérisé par les étapes suivantes :
    1ère étape : traitement du côté extérieur (As) des pièces coulées en aluminium (2 et 3) par projection humide sous haute pression d'un fluide qui contient au moins du sulfate de potassium,
    2ème étape : traitement des surfaces d'étanchéité et du côté intérieur (Is) des pièces coulées en aluminium (2 et 3) par projection humide sous haute pression,
    3ème étape : rinçage et traitement de conservation des pièces coulées en aluminium (2 et 3) et
    4ème étape : séchage des pièces coulées en aluminium (2 et 3).
  8. Procédé selon la revendication 7, caractérisé en ce que les pièces coulées en aluminium (2, 3) sont placées dans un bain d'immersion après la 3ème étape.
EP20040024902 2004-01-23 2004-10-20 Procédé de traitement de pièces en aluminium coulé Expired - Lifetime EP1557223B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200410003422 DE102004003422A1 (de) 2004-01-23 2004-01-23 Verfahren zur Behandlung von Aluminiumgussteilen
DE102004003422 2004-01-23

Publications (2)

Publication Number Publication Date
EP1557223A1 EP1557223A1 (fr) 2005-07-27
EP1557223B1 true EP1557223B1 (fr) 2008-07-30

Family

ID=34625766

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20040024902 Expired - Lifetime EP1557223B1 (fr) 2004-01-23 2004-10-20 Procédé de traitement de pièces en aluminium coulé

Country Status (2)

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EP (1) EP1557223B1 (fr)
DE (2) DE102004003422A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103938135B (zh) * 2014-04-29 2015-09-16 江苏大学 能显著提高航空铝合金材料抗振性能的方法及装置

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2166213A (en) * 1984-10-23 1986-04-30 Honda Motor Co Ltd Cleaning workpieces
US5116425A (en) * 1990-06-07 1992-05-26 Softblast, Inc. Cleaning method
US5681205A (en) * 1993-08-12 1997-10-28 Church & Dwight Co., Inc. Method of using abrasive blast media containing corrosion inhibitor
US5366560A (en) * 1993-09-03 1994-11-22 Yelapa Enterprises, Inc. Cleaning method utilizing sodium bicarbonate particles

Also Published As

Publication number Publication date
EP1557223A1 (fr) 2005-07-27
DE502004007730D1 (de) 2008-09-11
DE102004003422A1 (de) 2005-08-18

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