PL101696B1

PL101696B1 - METHOD AND APPARATUS FOR ELECTROLYTICAL GENERATING OF OXIDE FILMS ON ALUMINUM CYLINDER BEARING SURFACES

Info

Publication number: PL101696B1
Application number: PL19673377A
Authority: PL
Inventors: Mieczyslaw Wolek
Original assignee: Univ Slaski
Priority date: 1977-03-16
Filing date: 1977-03-16
Publication date: 1979-01-31
Also published as: PL196733A1

Description

Przedmiotem wynalazku jest sposób elektrolitycznego wytwarzania powlok tlenkowych na gladziach cylin¬ drów maszyn tlokowych i lopatkowych wykonywanych ze stopów aluminium, a zwlaszcza sprezarek oraz urza¬ dzenie do elektolitycznego wytwarzania powlok tlenkowych na gladziach cylindrów aluminiowych.The subject of the invention is a method of electrolytic production of oxide coatings on cylinder carbon wires of piston and vane machines made of aluminum alloys, especially compressors and devices for electrolytic production of oxide coatings on aluminum cylinder liners.

Znane sposoby utleniania gladzi cylindrów prowadzone sa w wannach elektrolitycznych i wymagaja zanu¬ rzenia calego elementu w elektrolicie. Zarówno cylindry chlodzone powietrzem jak i woda maja rozbudowane powierzchnie zewnetrzne i wewnetrzne wynikajace z ksztaltu zeber, kieszeni i plaszczy wodnych oraz komór zaworowych. Te skomplikowane ksztalty utrudniaja calkowite usuniecie pozostalosci zanieczyszczen technolo¬ gicznych powstajacych przy obróbce mechanicznej i procesie chemicznego przygotowania wstepnego powierzch¬ ni. Umieszczenie takiego elementu w wannie elektrolitycznej doprowadza do zanieczyszczenia elektrolitu a zatem jego szybkiego zuzycia i uzyskiwania powlok tlenkowych niewlasciwej jakosci.The known methods of oxidizing cylinder cores are carried out in electrolytic tanks and require immersion casting the entire element in the electrolyte. Both air-cooled and water-cooled cylinders are extensive external and internal surfaces resulting from the shape of ribs, pockets and water coats and chambers valve. These complicated shapes make it difficult to completely remove the residual technological contamination of mechanical treatment and chemical pretreatment of the surface no. Placing such an element in the electrolyte bath leads to the contamination of the electrolyte and thus its rapid wear and the formation of oxide coatings of poor quality.

Celem wynalazku jest opracowanie sposobu elektrolitycznego utleniania oraz urzadzenia, które eliminuje wymienione niedogodnosci.The object of the invention is to provide an electrolytic oxidation method and a device to eliminate listed inconvenience.

Sposób wedlug wynalazku polega na tym, ze do wanny stanowiacej wewnetrzna obojetnosc cylindra lub zespolu cylindrów przylegajacych do siebie otworami wprowadza sie elektrolit w sposób ciagly z zewnatrz, przy czym znajduje sie on w ruchu obiegowym pomiedzy katoda a gladzia stanowiaca jednoczesnie anode.The method according to the invention consists in the fact that a bathtub constituting the internal volume of a cylinder or of the group of cylinders adjacent to each other through the holes, the electrolyte is continuously introduced from the outside, with what it is in the circular motion between the cathode and the smoothing rod, which is also the anode.

Zaleta tego sposobu jest to, ze w procesie utleniania bierze udzial jedynie powierzchnia gladzi cylindra, a dostarczony do procesu elektrolit posiada zawsze wlasciwa temperature.The advantage of this method is that only the cylinder surface is involved in the oxidation process, and the electrolyte delivered to the process is always at the right temperature.

Urzadzenie wedlug wynalazku sklada sie z dwóch kolpaków skrecanych srubami, pomiedzy którymi znajduje sie co najmniej jeden obrabiany cylinder, przy czym jeden z kolpakówjest zaopatrzony w cylindryczna tuleje spelniajaca role katody i równoczesnie elementu doprowadzajacego lub odprowadzajacego elektrolit wzdluz gladzi cylindra oraz w króciec doprowadzajacy i odprowadzajacy elektrolit w ruchu obiegowym.2 101 696 Sposób oraz urzadzenie wedlug wynalazku posiada te ceche i jednoczesnie zalete, ze umozliwia utrzymanie stabilnosci procesu elektrochemicznego. Przyczynia sie to do uzyskiwania jednorodnej na calej powierzchni gladzi cylindra warstwy tlenku aluminium tak pod wzgledem jej budowy jak pod wzgledem grubosci.The device according to the invention consists of two hubcaps twisted with screws, between which there is at least one cylinder to be machined, one of the caps is provided with a cylindrical one A sleeve that plays the role of a cathode and, at the same time, an element that supplies or discharges electrolyte along the cylinder surface and in the electrolyte supply and discharge connector in circular motion. 2 101 696 The method and apparatus according to the invention have these features and at the same time have the advantage of being maintainable stability of the electrochemical process. This contributes to obtaining a homogeneous over the entire surface it smoothes the cylinder of the aluminum oxide layer both in terms of its structure and thickness.

Przedmiot wynalazku jest widoczny w przykladzie wykonania na rysunku, na którym fig. 1 przedstawia urzadzenie w przekroju wzdluz osi podluznej, a fig. 2 — ogólny schemat technologiczny.The subject matter of the invention is visible in the example of the drawing in which Fig. 1 shows the device in a section along the longitudinal axis, and fig. 2 - a general technological scheme.

Urzadzenie sklada sie z dwóch kolpaków 1 i 2 skreconych srubami 3, pomiedzy którymi jest widoczny cylinder 4 stanowiacy jednoczesnie anode. Kolpak 1 jest zaopatrzony w olowiana cylindryczna katode 5 two¬ rzac elektrolizer razem z zewnetrzna objetoscia cylindra 4 wypelnionego elektrolitem. Poprzez katode 5 dopro¬ wadzany jest elektrolit, który przeplywajac wzdluz gladzi cylindra 4 wyplywa przez króciec 6 w kolpaku 1 do zbiornika 8, skad jest przetlaczany przez pompe 7 ponownie do obiegu. W dolnej czesci kolpaka 2 jest umiesz¬ czony 9 spustowy króciec elektrolitu wraz z zaworem 10.The device consists of two caps 1 and 2 screwed together with screws 3, between which it is visible cylinder 4 which is also the anode. Kolpak 1 is provided with a lead cylindrical cathode 5 Put the electrolyser together with the external volume of cylinder 4 filled with electrolyte. Via cathode 5 the electrolyte is discharged, flowing along the cylinder surface 4, it flows through the connector 6 in the cap 1 to tank 8, from which it is forced back into circulation by pump 7. There is a place in the lower part of the cap 2 connected 9 electrolyte drain connection with valve 10.

Claims

Patent claims

1. A method of electrolytic production of oxide coatings on aluminum cylinder liners, characterized in that an electrolyte is continuously introduced from the outside into the tub, which is the internal volume of the cylinder, or into a group of cylinders adjacent to each other, with an electrolyte being continuously introduced from the outside, and it is located in a circular motion between the cathode and the cylinder surface which is also the anode.

2. A device for the electroplating production of oxide coatings on aluminum cylinder liners, characterized in that it has two caps (1 and 2) screwed together with screws (3), between which there is at least a cylinder (4), one of the caps ( 1) is provided with a cylindrical sleeve (5) that acts as a cathode and, at the same time, of an electrolyte supply or discharge element along the cylinder head, and a connector (6) for circulating electrolyte supply or discharge from the pump (7) and the surge tank (8). * Work. Typographer. UP PRL, edition 120 + 18