EP0320902B1 - Vorrichtung zum Erzeugen von Dispersionsschichten - Google Patents

Vorrichtung zum Erzeugen von Dispersionsschichten Download PDF

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Publication number
EP0320902B1
EP0320902B1 EP19880120895 EP88120895A EP0320902B1 EP 0320902 B1 EP0320902 B1 EP 0320902B1 EP 19880120895 EP19880120895 EP 19880120895 EP 88120895 A EP88120895 A EP 88120895A EP 0320902 B1 EP0320902 B1 EP 0320902B1
Authority
EP
European Patent Office
Prior art keywords
flow
flow member
electrolyte
anode
cylinder
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
EP19880120895
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0320902A1 (de
Inventor
Götz Mielsch
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.)
Bayerische Motoren Werke AG
Original Assignee
Bayerische Motoren Werke 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
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6342718&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0320902(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Bayerische Motoren Werke AG filed Critical Bayerische Motoren Werke AG
Priority to AT88120895T priority Critical patent/ATE73506T1/de
Publication of EP0320902A1 publication Critical patent/EP0320902A1/de
Application granted granted Critical
Publication of EP0320902B1 publication Critical patent/EP0320902B1/de
Anticipated expiration legal-status Critical
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Classifications

    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D15/00—Electrolytic or electrophoretic production of coatings containing embedded materials, e.g. particles, whiskers, wires
    • C25D15/02—Combined electrolytic and electrophoretic processes with charged materials

Definitions

  • the invention relates to a device of the type specified in the preamble of the first claim.
  • EP-A-0 190 539 describes a device for increasing the rate of incorporation of solid particles in surfaces to be coated.
  • a flow body which has two annular chambers.
  • the lower annular chamber is connected to the inlet of the electrolyte.
  • a turbulent flow is generated there.
  • the upper annular chamber of the flow body is in contact with the surface to be coated and has a laminar flow of the electrolyte.
  • the change in flow is achieved by partitions between the lower chamber and the upper chamber. It is thereby achieved that the electrolyte slowly flows upwards in a spiral movement on the inner surface to be coated without eddy formation, so that a long contact time with the inner surface to be coated is ensured. This results in a regular dispersion layer with a high build-up rate.
  • the object of the present invention is to develop a device of the type mentioned at the outset in such a way that, in a single processing step, differently dense installation rates of the wear-reducing solid particles are made possible in a controlled manner.
  • this object is achieved by the characterizing features of the first claim.
  • the invention is based on the finding that the installation rate of the wear-reducing solid particles can be increased significantly in the presence of a turbulent flow. It is therefore only necessary to ensure that a turbulent flow of the electrolyte is maintained in the area in which an increased installation rate is required. In the other areas, which allow a reduced incorporation rate of the solid particles, a laminar flow - as is known in the prior art - is maintained. As a result, two differently thick dispersion layers can be achieved in a single operation. This is particularly economical because, on the one hand, only a single processing step is necessary and, on the other hand, the more wear-resistant, concentrated layers can only be produced where they are absolutely necessary.
  • Claim 2 describes a flow body with which a turbulent and then a laminar flow can be achieved on the surfaces to be coated at the inlet.
  • Claims 4-6 describe preferred embodiments of the flow body.
  • the flow body described here is preferably suitable for use on cylinder running surfaces of reciprocating piston internal combustion engines. This ensures that only the cylinder surfaces that are to be coated are also coated. All other parts of the crankcase forming the cylinder running surfaces are not coated unnecessarily.
  • crankcase 1 of an internal combustion engine is shown schematically in cross section.
  • 2 denotes the cylinder bore in which a piston carries out an oscillating movement in the fully assembled internal combustion engine.
  • An anode 3 is located in the cylinder bore 2 and is held by a flow body 4.
  • the flow body 4 has an annular channel 5, which - as shown in Fig. 2 - is designed spirally, so that the fluid guided through the inlet 6 into the annular channel 5 experiences an increase in speed with increasing flow.
  • Overflow channels 7 run from the annular channel 5 into a swirl chamber 8.
  • the overflow channels 7 are oriented obliquely towards the cylinder axis 9 and are also arranged in a ring, so that the liquid entering the annular channel 5 can enter the overflow channels 7 at any point.
  • the overflow channels 7 are connected to the swirl chamber 8, which is also arranged circumferentially. In cross section, it has an annular contour. From there, the fluid reaches the annular gap 10, which is formed between the cylinder bore 2 and the outer circumference of the anode 3.
  • the anode 3 sits on an anode holder 11, which has a central bore 12, which serves as an overflow and drain for the fluid transported in the annular gap 10.
  • the swirl chamber 8 is formed in its lower part by the flow body 4 or the anode holder 11.
  • the upper part of the swirl chamber is through formed a partial circumference of the anode 3 and a part of the wall of the crankcase 1 to be coated.
  • a turbulent flow is generated in this area according to the invention. Due to the spiral channel 5, the flow in the overflow channel 7 is broken down into two main components, namely once in a vertically ascending part and in a tangential part. Because of this division, a turbulent flow now arises in the swirl chamber 8, which increasingly directs the solid bodies to be stored against the upper region 14 of the cylinder bore 2.
  • This area is delimited by the deflection nose 15, which is formed by the annular segment of the anode 3 and its vertically running peripheral wall. The fluid flow is laminar in the direction of flow of the fluid above this deflection nose. This means a lower installation rate.
  • the surface to be coated adjoining the region 14 is coated with a solid particle layer in a lower concentration, which corresponds to a lower wear resistance.
  • the length of the layer with the higher layer density is limited here by the position of the deflection nose 15.
  • Silicon carbides are preferably used as wear-reducing solid particles if aluminum is provided as the base material.
  • Suitable electrolytes are generally known.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Electroplating Methods And Accessories (AREA)
  • Colloid Chemistry (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
  • Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)
EP19880120895 1987-12-16 1988-12-14 Vorrichtung zum Erzeugen von Dispersionsschichten Expired - Lifetime EP0320902B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88120895T ATE73506T1 (de) 1987-12-16 1988-12-14 Vorrichtung zum erzeugen von dispersionsschichten.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3742602 1987-12-16
DE19873742602 DE3742602A1 (de) 1987-12-16 1987-12-16 Vorrichtung zum erzeugen von dispersionsschichten

Publications (2)

Publication Number Publication Date
EP0320902A1 EP0320902A1 (de) 1989-06-21
EP0320902B1 true EP0320902B1 (de) 1992-03-11

Family

ID=6342718

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19880120895 Expired - Lifetime EP0320902B1 (de) 1987-12-16 1988-12-14 Vorrichtung zum Erzeugen von Dispersionsschichten

Country Status (6)

Country Link
US (1) US4929327A (enExample)
EP (1) EP0320902B1 (enExample)
JP (1) JP2701895B2 (enExample)
AT (1) ATE73506T1 (enExample)
DE (1) DE3742602A1 (enExample)
ES (1) ES2030834T3 (enExample)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3937763A1 (de) * 1989-11-14 1991-05-16 Bayerische Motoren Werke Ag Verfahren zum herstellen einer laufflaechenbewehrung
DE3937765A1 (de) * 1989-11-14 1991-05-16 Bayerische Motoren Werke Ag Bauteil mit einer siliziumcarbidhaltigen verschleiss-schutzschicht
DE4311859A1 (de) * 1993-04-10 1994-10-13 Mahle Gmbh Vorrichtung zum Vorbehandeln und/oder zur Herstellung einer Laufflächenbeschichtung an Zylindern
DE4334106C1 (de) * 1993-10-06 1995-03-30 Stohrer Doduco Gmbh & Co Vorrichtung zum selektiven Behandeln der Oberfläche von Werkstücken durch Fluten der Werkstücke mit einer Behandlungsflüssigkeit
US6086731A (en) * 1996-10-24 2000-07-11 Honda Giken Kogyo Kabushiki Kaisha Composite plating apparatus
DE10349446B4 (de) * 2003-10-23 2005-09-29 Koenig & Bauer Ag Verfahren zur Beschichtung einer Fläche eines Zylinders und Zylinder mit dieser Beschichtung
WO2005123989A1 (ja) 2004-06-16 2005-12-29 Honda Motor Co., Ltd. メッキ装置
JP4391893B2 (ja) * 2004-06-16 2009-12-24 本田技研工業株式会社 メッキ装置
JP5364468B2 (ja) * 2008-09-26 2013-12-11 日精樹脂工業株式会社 めっき被覆アルミニウム製品
CN109267140B (zh) * 2018-10-30 2019-07-16 郑州磨料磨具磨削研究所有限公司 一种旋转上砂装置及利用其电镀螺旋砂轮基体的方法

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2406956A (en) * 1942-10-27 1946-09-03 Gen Motors Corp Apparatus for electroplating of bearing shells
US3061537A (en) * 1957-10-31 1962-10-30 Yoshikazu Ukai Electrolyte purifying device
FR1419637A (fr) * 1964-06-15 1965-12-03 Cellule d'électrolyse aqueuse de solutions salines, notamment des chlorures alcalins
US3582525A (en) * 1967-11-29 1971-06-01 Cincinnati Milacron Inc Electrolyte manifold for electrochemical machining
US3718540A (en) * 1971-04-19 1973-02-27 Int Research & Dev Co Ltd Electrolytic cells
DE2261776A1 (de) * 1972-12-16 1974-07-04 Blasberg Gmbh & Co Kg Friedr Verfahren und vorrichtung zum vorzugsweise elektrolytischen erzeugen von dispersionsschichten an werkstueckflaechen
US3957596A (en) * 1974-05-21 1976-05-18 Ontario Research Foundation Production of fluorinated hydrocarbons
GB1497543A (en) * 1974-11-13 1978-01-12 Parel Sa Flow of electrolyte through electrolytic cells
ATE50802T1 (de) * 1985-01-17 1990-03-15 Alusuisse Vorrichtung zum galvanischen abscheiden einer dispersionsschicht.

Also Published As

Publication number Publication date
JPH0215193A (ja) 1990-01-18
ES2030834T3 (es) 1992-11-16
US4929327A (en) 1990-05-29
DE3742602C2 (enExample) 1991-06-27
EP0320902A1 (de) 1989-06-21
ATE73506T1 (de) 1992-03-15
DE3742602A1 (de) 1989-06-29
JP2701895B2 (ja) 1998-01-21

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