EP0548469B2 - Stromleitwalze für elektrolytische Bandbeschichtungsanlagen und Verfahren zu ihrer Herstellung - Google Patents

Stromleitwalze für elektrolytische Bandbeschichtungsanlagen und Verfahren zu ihrer Herstellung Download PDF

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Publication number
EP0548469B2
EP0548469B2 EP19920116006 EP92116006A EP0548469B2 EP 0548469 B2 EP0548469 B2 EP 0548469B2 EP 19920116006 EP19920116006 EP 19920116006 EP 92116006 A EP92116006 A EP 92116006A EP 0548469 B2 EP0548469 B2 EP 0548469B2
Authority
EP
European Patent Office
Prior art keywords
sleeve
nickel
roller
chromium
approximately
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
EP19920116006
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0548469A1 (de
EP0548469B1 (de
Inventor
Paul Kaesberg
Werner Quarz
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.)
HARTCHROM FROHME GMBH
Rasselstein AG
Original Assignee
Hartchrom Frohme GmbH
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=6448120&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0548469(B2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Hartchrom Frohme GmbH filed Critical Hartchrom Frohme GmbH
Publication of EP0548469A1 publication Critical patent/EP0548469A1/de
Application granted granted Critical
Publication of EP0548469B1 publication Critical patent/EP0548469B1/de
Publication of EP0548469B2 publication Critical patent/EP0548469B2/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • C25D7/00—Electroplating characterised by the article coated
    • C25D7/06—Wires; Strips; Foils
    • C25D7/0614—Strips or foils
    • C25D7/0657—Conducting rolls

Definitions

  • the invention relates to a current guide roller for Electrolytic coil coating systems, consisting from a cylindrical roller shell Steel with a flange in each end a steel journal is shrunk in, with at least the shaft journals and their flanges with a conductive layer made of good electrical conductivity Metal, especially copper, are provided and up a sleeve made of corrosion-resistant Metal is shrunk onto the electrolytic one Hard chrome working layer is applied.
  • Such current guide rollers are used for transmission high electrical currents in the order of magnitude from 10,000 to 20,000 A in coil coating systems with strongly corrosive electrolytes, for example Chromic acid with the addition of sodium fluoride.
  • the electricity comes from a power source over the current guide roller to that in the coil coating system to be coated with metal Band, for example a steel band, initiated.
  • the Power is supplied via power supply elements, that attack the shaft journal.
  • the current then flows over the copper conductive layer to the roller shell and from there into that metal strip to be coated.
  • Hard chrome layers are, as common is known with a network of micro cracks afflicted.
  • the electrolyte can penetrate into these cracks and infiltrate the chrome layer what to a withdrawal of the same can result.
  • the invention is therefore based on the object a current guide roller for electrolytic coil coating systems of the type mentioned at the beginning create at the signs of detachment of the Hard chrome layer, as well as surface corrosion and Pitting, can be avoided, and the one has a long service life.
  • This task is done with a current guide roller of the type mentioned in that the rifle from a highly corrosion resistant Nickel-chrome-molybdenum alloy exists and that between the box and the Working layer a nickel pre-galvanization is galvanized onto the surface of the can.
  • the one shrunk onto the roller shell and expediently welded to it Rifle made of a highly corrosion-resistant Nikkel-Chrom-Molybdenum alloy offers an effective and long-lasting protection against corrosion. Even if through the micro cracks of the hard chrome layer Electrolyte to the surface of the can arrives, there is no surface corrosion on the bush or pitting, so that the hard chrome layer cannot be infiltrated by the electrolyte. It will replace individual parts of the Hard chrome layer avoided and this can be yours Purpose long time until friction is worn out. The one that sticks permanently to the can Hard chrome layer ensures thanks to its hardness of approx. 1,100 HV for high wear resistance.
  • the new current guide roller has a service life that is around is many times larger than that previously known Current guide rollers. As a result, the new Current guide rollers are replaced less often and there is less production loss. In addition, the time intervals between the restoration of the current guide roller longer and restoration takes one less work because the surface of the Rifle not caused by surface corrosion or pitting is damaged. To restore the current guide roller is therefore usually just a new hard chrome plating the working layer worn out by wear required.
  • the invention also relates to a method for Production of a current guide roller in the claim 1 specified type.
  • This procedure exists in that the sleeve made of nickel-chromium-molybdenum alloy shrunk onto the roller shell, if necessary on the face side with this tightly welded, then turned to the finished dimension and sanded, the sanded surface shot peened, electrolytically cleaned and degreased, then with a nickel pre-galvanization coated and finally the Hard chrome layer is applied electrolytically.
  • the current guide roller 1 has a cylindrical hollow roller shell 2. At both ends of this Roll shell 2 is a flange 3 a shaft journal 4 shrunk, which is useful forms one piece with the shaft journal. Of the Flange 3 is also over a first weld 5 tightly connected to the roll shell 2. To remove those generated during electrolysis processes The hollow roller jacket from Cooling water to flow through, which by a central channel 6 of the one roll neck in the cavity enclosed by the roll shell 2 initiated and through each other's channel Roll neck is removed again. Possibly can also the cooling water on one and the same Side of the Stromleitwalze 1 fed and discharged if for this purpose the roll neck is provided with two channels.
  • This guiding layer 7 is expedient in an uninterrupted Electroplating process applied.
  • the conductive layer 7 can if necessary also on the outer surface of the roll shell 2 extend to the current conductivity to increase in the area of the roll shell. This also extends over the surface of the Roll jacket extending conductive layer is, however in the embodiment shown in the drawing not shown.
  • the roll shell 2 is of a corrosion-resistant Protective layer in the form of a sleeve 8 surrounded by a highly corrosion resistant Nickel-chromium-molybdenum alloy.
  • This Bush 8 is shrunk onto the roll shell and conveniently on both front sides via one second weld 9 tightly with the roll shell 2 welded.
  • the sleeve 8 is useful in the centrifugal casting process from the highly corrosion resistant Nickel-chromium-molybdenum alloy manufactured.
  • the inner surface of the Bush 8 finished to a degree, which slightly is smaller than the outside diameter of the Roll shell.
  • the outer surface the sleeve 8 is turned.
  • For shrinking the sleeve 8 is on the roll shell 2 this one filled with cold water while the Bush 8 heated to about 180 to 200 ° and with pushed about 160 to 180 ° over the roller jacket 2 becomes. Then the sleeve 8 is on their two ends by means of the weld 9 with welded the roll shell 2.
  • the shrunk-on sleeve 8 is opened the finished dimension turned off and its surface by belt sanding with a surface roughness Ra of 0.5 ⁇ m.
  • a working layer 10 made of hard chrome with a layer thickness of about 200 microns and one Hardness of approximately 1,100 HV electroplated.
  • the nickel-chrome-molybdenum alloy the sleeve 8 the required high corrosion resistance it should be around 14 to 18% Chromium and about 14 to 18% molybdenum.
  • the rifle should be made of a nickel-chrome-molybdenum alloy the one in the so-called "steel key (Publishing and distribution by StahlKey Wegst GmbH, D-7142 Marbach) under material no. 2.4610 specified type.
  • a nickel-chrome-molybdenum alloy that about 0.015% C, about 16% Cr, about 15.5% Mo, to contains 0.7% Ti, up to 3% Fe, balance Ni, as proven to be particularly corrosion-resistant.
  • Such highly corrosion-resistant nickel-chromium-molybdenum alloy is under the name HA-STELLOY C-4 (registered trademark) known (Source of supply from Haynes and Kokomo).
  • the wall thickness of the sleeve 8 should according to her Finishing about 10 to 20 mm, preferably about 15 mm. It should also be noted that their finished diameter, for example Is 614 mm.
  • the surface of the sleeve 8 after it has been turned to the finished size and was sanded, shot peened. Subsequently the surface is cleaned electrolytically and degreased and at the same time to a temperature heated from about 50 to 55 ° C.
  • This electrolyte should preferably contain 200 g / l nickel chloride (NiCl 2 ), 80 ml / l 36% hydrochloric acid (HCL) and 50 g / l iron (Fe).
  • the current density in this electrolyte should be about 1 to 10 A / dm 2 .
  • the hard chrome layer produced should have a thickness of about 200 ⁇ m a hardness of approx.1,100 HV.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Electroplating Methods And Accessories (AREA)
EP19920116006 1991-12-24 1992-09-18 Stromleitwalze für elektrolytische Bandbeschichtungsanlagen und Verfahren zu ihrer Herstellung Expired - Lifetime EP0548469B2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4142952A DE4142952C1 (enrdf_load_stackoverflow) 1991-12-24 1991-12-24
DE4142952 1991-12-24

Publications (3)

Publication Number Publication Date
EP0548469A1 EP0548469A1 (de) 1993-06-30
EP0548469B1 EP0548469B1 (de) 1995-09-06
EP0548469B2 true EP0548469B2 (de) 1999-08-18

Family

ID=6448120

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19920116006 Expired - Lifetime EP0548469B2 (de) 1991-12-24 1992-09-18 Stromleitwalze für elektrolytische Bandbeschichtungsanlagen und Verfahren zu ihrer Herstellung

Country Status (2)

Country Link
EP (1) EP0548469B2 (enrdf_load_stackoverflow)
DE (1) DE4142952C1 (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111321452A (zh) * 2018-12-17 2020-06-23 联合汽车电子有限公司 深内孔零件挂镀结构

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009057466A1 (de) * 2009-12-03 2011-06-09 Hübel, Egon, Dipl.-Ing. (FH) Vorrichtung und Verfahren zum elektrischen Kontaktieren von Behandlungsgut in Galvanisieranlagen

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3451903A (en) * 1965-04-09 1969-06-24 Mitsubishi Heavy Ind Ltd Conductor roll and method of making the same
FR2315550A1 (fr) * 1975-06-26 1977-01-21 Nobel Bozel Traitements Surfac Rouleau conducteur monobloc pour traitements electrolytiques de materiaux en bande
JPS6289895A (ja) * 1985-10-15 1987-04-24 Nippon Kokan Kk <Nkk> 表面処理用通電ロ−ル

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111321452A (zh) * 2018-12-17 2020-06-23 联合汽车电子有限公司 深内孔零件挂镀结构
CN111321452B (zh) * 2018-12-17 2021-06-08 联合汽车电子有限公司 深内孔零件挂镀结构

Also Published As

Publication number Publication date
EP0548469A1 (de) 1993-06-30
EP0548469B1 (de) 1995-09-06
DE4142952C1 (enrdf_load_stackoverflow) 1993-04-08

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