EP0915188B1 - Conducting roll for a strip coating installation - Google Patents

Conducting roll for a strip coating installation Download PDF

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Publication number
EP0915188B1
EP0915188B1 EP98120151A EP98120151A EP0915188B1 EP 0915188 B1 EP0915188 B1 EP 0915188B1 EP 98120151 A EP98120151 A EP 98120151A EP 98120151 A EP98120151 A EP 98120151A EP 0915188 B1 EP0915188 B1 EP 0915188B1
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EP
European Patent Office
Prior art keywords
roller
base body
inner ring
cooling channels
base bodies
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
EP98120151A
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German (de)
French (fr)
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EP0915188A2 (en
EP0915188A3 (en
Inventor
Werner Schimion
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.)
SMS Siemag AG
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SMS Demag AG
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Priority claimed from DE19804257A external-priority patent/DE19804257A1/en
Application filed by SMS Demag AG filed Critical SMS Demag AG
Publication of EP0915188A2 publication Critical patent/EP0915188A2/en
Publication of EP0915188A3 publication Critical patent/EP0915188A3/en
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    • 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 present invention relates to a current roller for an electrolytic Coil coating line.
  • a current role generally has the task of that of coating anodes tape passing current back to a rectifier due.
  • the strip to be coated is passed horizontally through a Coating cell led, the current rollers in front and behind the cell are arranged, lie on the belt from above or below and with the help of a rubberized counter roller a line pressure exercise on the tape.
  • Roll circumferential speed is determined by the line contact between Band and current roll the current from the band to the current roll transmitted and from this via slip ring systems to the rectifier recycled.
  • the strip to be coated is used in vertical coating systems after leaving the coating cell via current rollers, the at the same time also deflection rollers are deflected by 180 °, so that Belt can enter the next coating cell.
  • the current role has in this case not only power transmission, but also tape management tasks. Because of the bending stiffness of the bands, but also because of the relatively large distances between the coating cells the current roller for vertical systems is relatively large in diameter perform.
  • Another The heat source is the wrapped band, which is also through warmed the internal electrical resistance.
  • band thicknesses in Range below 1 mm strip thickness the strip temperature can be values over 100 Reach ° C, with appropriate heating of the current roller.
  • the current roller is in principle a round hollow body formed, the outer jacket of an acid-resistant and current-conducting Metal.
  • the hollow body is partial or complete filled with cooling water, with cold Introduce water and drain heated water over the other spigot becomes.
  • Another known solution provides for the cavity with displacement bodies largely fill out, creating the latent water mass inside the current roller is reduced, but still the problem of uncontrollable cooling remains.
  • US-A-2 526 312 discloses a current roller for an electrolytic coil coating system known, wherein the current roller has a roller axis, wherein the current roller has a roller jacket with an inner and an outer jacket surface and has two substantially cylindrical bodies, the Basic body cylindrical surfaces, facing and facing away from each other Have sides.
  • the basic bodies are with the roller shell by a press fit and thus inextricably linked.
  • the object of the present invention is a current roller to create, which avoids the aforementioned disadvantages, thereby can be produced with low costs and effort and also that No need to reserve parts of entire roles.
  • the task is accomplished by a current roll for an electrolytic coil coating line, solved with a roller axis, in which the current roller from a roller shell with a Inner wall and an outer wall, which is around the outer surfaces of two, each other opposite and coaxially arranged, cylindrical base bodies attached is, the base body are releasably connected to each other and the cylinder jackets the base body has cooling channels for a cooling liquid.
  • roller casing as such easily replaceable, so that spare parts can be kept whole current rolls is no longer required.
  • the current roller can be produced particularly cost-effectively if the base body is made of normal steel consist and the roller jacket from an acid-resistant and electrically conductive Material, e.g. Stainless steel.
  • the cylinder jackets of the base body are designed to be electrically insulating, that is Current flow in the roll jacket easier to control. This can ensure even heating the current role can be guaranteed.
  • the electrical insulation of the cylinder jackets can e.g. by using a hard, acid-proof, electrically insulating material Layer are provided.
  • roller shell and base body The releasable attachment of the roller shell and base body is particularly easy, if the basic bodies correspond to one another and run parallel to the roller axis Through holes for fasteners, e.g. Tie rods.
  • roller shell 1 for an electrolytic one Coil coating system from a roll shell 1 and two base bodies 2, 3.
  • the roller shell 1 is essentially hollow cylindrical and has an inner wall 4 and an outer wall 5. It consists of an acid-resistant, electrically conductive material, e.g. Stainless steel.
  • On the inner wall 4 of the roll shell 1 is a concentric welded around a roller axis 6 rotating inner ring 7. As can be seen, the inner ring 7 is arranged centrally.
  • the base bodies 2, 3 are of essentially the same design. she are essentially cylindrical, hollow on the inside and point to their sides facing away from each other pins 8, by means of which they in Bearings, not shown, are rotatably supported.
  • the basic body 2, 3 consist of mild steel. You fill the roll jacket 1 in essential, preferably even a perfect fit.
  • the basic body 2, 3 thus have mutually facing sides 9, facing away from one another Pages 10 and the roller jacket 1 facing cylinder jackets 11.
  • the cylinder jackets 11 are hard, acid-resistant and electric insulating layer.
  • the layer can, for example Oxide ceramics exist in which to avoid porosity Fillers are introduced. Such a coating is inexpensive and easy to apply. It protects the cylinder jackets 11 also against corrosion by a coolant (water) and also against possible electrolytic vapors.
  • the cylinder jackets 11 are thus designed to be electrically insulating.
  • Both the roller shell 1 and the base body 2, 3 are here arranged symmetrically with respect to the axis 6, which in the following is also referred to as the roller jacket axis.
  • the base bodies 2, 3 have through holes 12.
  • the through holes 12 run parallel to the roller axis 6 and correspond together.
  • Drawbars 13 can be inserted so that the roller shell 1 and the base body 2, 3 by screw nuts screwed onto the tie rods 13 14 are releasably connectable. This can, if necessary the roller shell 1 can be easily replaced without the whole current roll must be machined. The spare parts inventory is therefore reduced to the roller shells 1.
  • the cylinder jackets 11 of the base body 2, 3 have cooling channels 15 for a cooling liquid, e.g. Water, on.
  • the cooling channels 15 are as spirals formed around the cylinder jackets 11.
  • the Cooling ducts 15 of one base body 2 are designed to run on the left, that of the other base body 3 right-handed. You are in the present Case semi-circular. But you could also use a different shape exhibit.
  • the coolant circuit is as follows:
  • the cooling liquid is fed into the current roller via a feed bore 16 fed.
  • the feed bore 16 of one base body 2 is located on the roller axis 6 and is on the other base body 3rd Side 10 facing away from a base body 2. thereupon the cooling liquid is shown via outer radial bores 17 - is only one in Fig. 2 - fed into the first longitudinal bores 18.
  • the outer radial bores 17 are also on the another base body 3 facing away from side 10 of one base body 2 arranged.
  • the first longitudinal bores 18 run below the Cooling channels 15 parallel to the roller axis 6 and are to the inner ring 7 open towards.
  • the outer radial bores 17 of one body 2 are still between the cooling channels 15 and the first longitudinal bores 18 closed, e.g. welded or screwed in a threaded plug.
  • the other base body 3 also has first longitudinal bores 19 which will be discussed later. But he still points also second, open to the inner ring 7 towards the longitudinal bores 20, the also run parallel to the roller axis 6.
  • the first longitudinal holes 18 of one base body 2 are with the second longitudinal bores 20 of the other base body 3 via through holes 21 connected, which are arranged in the inner ring 7.
  • the basic body 2, 3 also have inner radial bores 22, which on each other facing sides 9 of the base body 2, 3 are arranged.
  • the inner radial bores 22 connect the first longitudinal bores 18 of one base body 2 or the second longitudinal bores 20 of the other base body 3 with the cooling channels 15.
  • cooling liquid e.g. Water into the cooling channels 15 can be fed. It then runs in a spiral from the inner ring 7 of the roll shell 1 to its outer ends.
  • a base body 2 on the side facing away from the other base body 3 Page 10 further outer radial bores 23, which differ from the Cooling channels 15 up to second longitudinal bores 24 of one base body 2 extend.
  • These second longitudinal bores 24 of one base body 2 also run parallel to the roller axis 6. They are open to the inner ring 7 and extend until shortly before the another base body 3 facing away from side 10 of one base body 2. They are via further through holes arranged in the inner ring 7 25 with the already mentioned first longitudinal bores 19 of the other base body 3 connected.
  • the first longitudinal bores 19 of the other base body 3 run also below the cooling channels 15 parallel to the roller axis 6 and are open to the inner ring 7. They are about outer radial holes 26 on the one hand with the cooling channels 15 and on the other hand with a feed bore 27 connected.
  • the feed hole 27 is in the other base body 3 arranged and lies on the roller axis 6. From this feed opening 27 from the cooling water can be fed out of the current roller become.
  • the current roller is cambered. This can be beneficial for tape running.

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  • 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)
  • Rolls And Other Rotary Bodies (AREA)

Abstract

A current contact roller, for an electrolytic strip coating unit, comprises two cylindrical base components (2, 3) arranged side-by-side within and releasably attached to a roller sleeve (1). Independent claims are also included for: (i) a method of cooling the above current contact roller, in which cooling liquid is fed into (or discharged from) cooling channels (15) at the facing sides (9) of the base components (2, 3) and is discharged from (or fed into) the cooling channels (15) at the remote sides (10) of the base components (2, 3); and (ii) an acid resistant and electrically conductive (e.g. special steel) roller sleeve for the above current contact roller, in which a concentric inner ring (7) is provided (preferably welded) centrally to the sleeve inner wall (4)

Description

Die vorliegende Erfindung betrifft eine Stromrolle für eine elektrolytische Bandbeschichtungsanlage.The present invention relates to a current roller for an electrolytic Coil coating line.

Eine Stromrolle hat allgemein die Aufgabe, den von Beschichtungsanoden auf ein Band übergehenden Strom wieder zu einem Gleichrichter zurückzuführen. Man unterscheidet dabei Stromrollenanordnungen für horizontalen und vertikalen Bandlauf.A current role generally has the task of that of coating anodes tape passing current back to a rectifier due. A distinction is made between current roller arrangements for horizontal and vertical belt run.

Im ersten Fall wird das zu beschichtende Band horizontal durch eine Beschichtungszelle geführt, wobei die Stromrollen vor und hinter der Zelle angeordnet sind, von oben oder unten auf dem Band aufliegen und mit Hilfe einer gummierten Gegenrolle eine Linienpressung auf das Band ausüben. Bei einer der Bandgeschwindigkeit entsprechenden Rollenumfangsgeschwindigkeit wird über den Linienkontakt zwischen Band und Stromrolle der Strom vom Band auf die Stromrolle übertragen und von dieser über Schleifringsysteme zum Gleichrichter zurückgeführt.In the first case, the strip to be coated is passed horizontally through a Coating cell led, the current rollers in front and behind the cell are arranged, lie on the belt from above or below and with the help of a rubberized counter roller a line pressure exercise on the tape. At a speed corresponding to the belt speed Roll circumferential speed is determined by the line contact between Band and current roll the current from the band to the current roll transmitted and from this via slip ring systems to the rectifier recycled.

In vertikalen Beschichtungssystemen wird das zu beschichtende Band nach Austritt aus der Beschichtungszelle über Stromrollen, die gleichzeitig auch Umlenkrollen sind, um 180° umgelenkt, damit das Band in die nächstfolgende Beschichtungszelle eintreten kann. Über die entstehende Auflagefläche zwischen Band und Stromrolle fließt der Strom vom Band in die Stromrolle und von hier über Schleifringsysteme wieder zum Gleichrichter zurück. Die Stromrolle hat in diesem Fall nicht nur Stromübertragungs-, sondern auch Bandführungsaufgaben. Wegen der Biegesteifigkeit der Bänder, aber auch wegen der relativ großen Abstände der Beschichtungszellen zueinander, ist die Stromrolle für Vertikalanlagen verhältnismäßig groß im Durchmesser auszuführen.The strip to be coated is used in vertical coating systems after leaving the coating cell via current rollers, the at the same time also deflection rollers are deflected by 180 °, so that Belt can enter the next coating cell. about the resulting contact surface between the belt and the current roller flows the current from the belt into the current roll and from here via slip ring systems back to the rectifier. The current role has in this case not only power transmission, but also tape management tasks. Because of the bending stiffness of the bands, but also because of the relatively large distances between the coating cells the current roller for vertical systems is relatively large in diameter perform.

Aufgrund des inneren elektrischen Widerstandes erwärmt sich die Stromrolle und nimmt im Durchmesser entsprechend zu. Eine weitere Wärmequelle ist das umschlungene Band, welches sich ebenfalls durch den inneren elektrischen Widerstand erwärmt. Bei Bandstärken im Bereich unter 1 mm Banddicke kann die Bandtemperatur Werte über 100 °C erreichen, mit entsprechender Aufwärmung der Stromrolle.Due to the internal electrical resistance the heats up Current roll and increases in diameter accordingly. Another The heat source is the wrapped band, which is also through warmed the internal electrical resistance. With band thicknesses in Range below 1 mm strip thickness, the strip temperature can be values over 100 Reach ° C, with appropriate heating of the current roller.

Aus diesen Gründen erhalten Stromrollen in der Regel eine innere Kühlung, deren Aufgabe es ist, eine gleichmäßige Temperaturverteilung über die Stromrollenlänge sicherzustellen. Hierdurch soll vermieden werden, daß unterschiedlich warme Abschnitte zu unterschiedlichen Durchmessern über die Ballenlänge führen. Dies hätte nämlich zur Folge, daß die Bandführung nicht mehr gewährleistet ist und es erfahrungsgemäß auch zu einer Qualitätsminderung der beschichteten Oberflächen kommt.For these reasons, current rolls are usually given an inner one Cooling, whose job is to ensure an even temperature distribution ensure over the current roller length. This is supposed to be avoided that different warm sections to different Lead diameters over the length of the bale. This should have been namely the consequence that the tape guide is no longer guaranteed and experience has shown that there is also a reduction in the quality of the coated Surfaces is coming.

Im Stand der Technik sind verschiedene Ausführungen hinsichtlich der Stromrollenkühlung bekannt.There are various designs in the prior art with regard to the current roller cooling known.

In einem Fall ist die Stromrolle im Prinzip als runder Hohlkörper ausgebildet, dessen äußerer Mantel aus einem säurefesten und stromleitenden Metall besteht. Der Hohlkörper ist teilweise oder vollständig mit Kühlwasser gefüllt, wobei über einen Rollenzapfen kaltes Wasser ein- und über den anderen Zapfen erwärmtes Wasser abgeführt wird. Diese Lösung ist die preiswerteste, hat aber folgende Nachteile:In one case the current roller is in principle a round hollow body formed, the outer jacket of an acid-resistant and current-conducting Metal. The hollow body is partial or complete filled with cooling water, with cold Introduce water and drain heated water over the other spigot becomes. This solution is the cheapest, but has the following disadvantages:

Durch die geringe Strömungsgeschwindigkeit des Kühlwassers zur inneren Wand ist der Wärmeübergang bei voll gefüllter Rolle gering. Due to the low flow rate of the cooling water The inner wall has little heat transfer when the roll is full.

Ferner erhöht die zusätzliche Wassermasse das Schwungmoment der Rolle und behindert dadurch die Antriebsregelung. Auch kann eine gleichmäßige Temperaturverteilung über die Ballenlänge nicht gewährleistet werden.Furthermore, the additional mass of water increases the momentum of the Role and thereby hinders the drive control. Also one can uniform temperature distribution over the bale length is not guaranteed become.

Eine andere bekannte Lösung sieht vor, den Hohlraum mit Verdrängungskörpern weitgehend auszufüllen, wodurch die latente Wassermasse im Innern der Stromrolle zwar verkleinert wird, jedoch nach wie vor das Problem der unkontrollierbaren Kühlung bestehen bleibt.Another known solution provides for the cavity with displacement bodies largely fill out, creating the latent water mass inside the current roller is reduced, but still the problem of uncontrollable cooling remains.

Es ist eine weitere Lösung bekannt, mit der die vorerwähnten Nachteile vermieden werden. Hierzu sind in einen konzentrischen Spalt zwischen dem äußeren Stromrollenmantel aus Edelstahl und einem inneren Zylinder aus Normalstahl enggewickelte Kupferrohre eingelegt, durch die das Kühlwasser mit hoher Strömungsgeschwindigkeit strömt. Zur Vermittlung des Wärmeüberganges zwischen dem äußeren Mantel und den Kupferrohren ist der verbleibende Hohlraum mit Zinkmetall ausgegossen.Another solution is known with which the aforementioned disadvantages be avoided. This is done in a concentric gap between the outer current roller jacket made of stainless steel and a inner cylinder made of normal steel, tightly wound copper tubes inserted, through which the cooling water with high flow rate flows. To mediate the heat transfer between the outer Sheath and the copper pipes is the remaining cavity with Poured zinc metal.

Mit dieser Lösung wird zwar eine kontrollierbare und gleichmäßige Wärmeabführung gewährleistet, jedoch sind die Fertigungskosten bedeutend höher als bei den zuvor beschriebenen Lösungen. Ein weiterer Nachteil besteht darin, daß nach mehrmaligem Abschliff des Rollenmantels infolge Verschleiß die Erneuerung der Rolle nur in einer Spezialwerkstatt erfolgen kann, indem z.B. ein neuer Mantel hergestellt und auf den zuvor auf Maß abgedrehten alten Mantel aufgeschrumpft wird. Ein einfacher Austausch des abgenutzten Rollenmantels ist nicht möglich. Folglich müssen bei Betreibern von Beschichtungsanlagen eine größere Anzahl von teuren Stromrollen in Reserve gehalten werden.With this solution it is a controllable and uniform Heat dissipation guaranteed, however, the manufacturing costs significantly higher than with the previously described solutions. On Another disadvantage is that after repeated grinding of the Roll cover due to wear the renewal of the roll only in a special workshop, e.g. a new coat made and on the old coat turned to size is shrunk. A simple exchange of the worn roll cover can not. Consequently, operators of Coating plants in larger numbers of expensive current rolls Reserve be kept.

Aus der US - A - 2 526 312 ist eine Stromrolle für eine elektrolytische Bandbeschichtungsanlage bekannt, wobei die Stromrolle eine Rollenachse aufweist, wobei die Stromrolle einen Rollenmantel mit einer inneren und einer äußeren Mantelfläche und zwei im wesentlichen zylindrische Grundkörper aufweist, wobei die Grundkörper Zylinderflächen, einander zugewandte und voneinander abgewandte Seiten aufweisen. Die Grundkörper sind mit dem Rollenmantel durch einen Preßsitz und damit unlösbar miteinander verbunden.US-A-2 526 312 discloses a current roller for an electrolytic coil coating system known, wherein the current roller has a roller axis, wherein the current roller has a roller jacket with an inner and an outer jacket surface and has two substantially cylindrical bodies, the Basic body cylindrical surfaces, facing and facing away from each other Have sides. The basic bodies are with the roller shell by a press fit and thus inextricably linked.

Die Aufgabe der vorliegenden Erfindung besteht darin, eine Stromrolle zu schaffen, welche die vorgenannten Nachteile vermeidet, dabei mit geringen Kosten und Aufwand herzustellen ist und auch die Reserveteilhaltung kompletter Rollen überflüssig macht. The object of the present invention is a current roller to create, which avoids the aforementioned disadvantages, thereby can be produced with low costs and effort and also that No need to reserve parts of entire roles.

Die Aufgabe wird durch eine Stromrolle für eine elektrolytische Bandbeschichtungsanlage, mit einer Rollenachse gelöst, bei der die Stromrolle aus einem Rollenmantel mit einer Innenwand und einer Außenwand besteht, welche um die Außenflächen von zwei, einander gegenüberliegender und koaxial angeordneter, zylinderförmigen Grundkörpern befestigt wird, wobei die Grundkörper lösbar miteinander verbunden sind und die Zylindermäntel der Grundkörper Kühlkanäle für eine Kühtflüssigkeit aufweisen.The task is accomplished by a current roll for an electrolytic coil coating line, solved with a roller axis, in which the current roller from a roller shell with a Inner wall and an outer wall, which is around the outer surfaces of two, each other opposite and coaxially arranged, cylindrical base bodies attached is, the base body are releasably connected to each other and the cylinder jackets the base body has cooling channels for a cooling liquid.

Denn dadurch ist der Rollenmantel als solches leicht austauschbar, so dass die Ersatzteilhaltung ganzer Stromrollen nicht mehr erforderlich ist.Because this makes the roller casing as such easily replaceable, so that spare parts can be kept whole current rolls is no longer required.

Die Stromrolle ist besonders kostengünstig herstellbar, wenn die Grundkörper aus Normalstahl bestehen und der Rollenmantel aus einem säurebeständigen und elektrisch leitfähigen Material, z.B. Edelstahl besteht.The current roller can be produced particularly cost-effectively if the base body is made of normal steel consist and the roller jacket from an acid-resistant and electrically conductive Material, e.g. Stainless steel.

Wenn die Zylindermäntel der Grundkörper elektrisch isolierend ausgebildet sind, ist der Stromfluß im Rollenmantel leichter steuerbar. Dadurch kann eine gleichmäßige Erwärmung der Stromrolle gewährleistet werden. Die elektrische Isolierung der Zylindermäntel kann z.B. dadurch erfolgen, dass diese mit einer harten, säurefesten, elektrisch isolierenden Schicht versehen sind.If the cylinder jackets of the base body are designed to be electrically insulating, that is Current flow in the roll jacket easier to control. This can ensure even heating the current role can be guaranteed. The electrical insulation of the cylinder jackets can e.g. by using a hard, acid-proof, electrically insulating material Layer are provided.

Wenn an der Innenwand des Rollenmantels ein konzentrisch um die Rollenachse umlaufender Innenring angeordnet ist, ist zum einen die Verbindbarkeit zwischen Rollenmantel und Grundkörpem besonders einfach zu bewerkstelligen. Zum anderen ist in Verbindung mit der elektrischen Isolierung der Zylindermäntel ein völlig symmetrischer Stromfluß im Rollenmantel erzwingbar.If on the inner wall of the roll shell concentric around the roll axis Inner ring is arranged, on the one hand, the connectivity between the roller jacket and basic body particularly easy to accomplish. The other is connected with the electrical insulation of the cylinder jackets a completely symmetrical current flow in the Roll jacket enforceable.

Die lösbare Befestigung von Rollenmantel und Grundkörpern ist besonders einfach, wenn die Grundkörper miteinander korrespondierende, parallel zur Rollenachse verlaufende Durchgangsbohrungen für Befestigungselemente, z.B. Zugstangen, aufweisen. The releasable attachment of the roller shell and base body is particularly easy, if the basic bodies correspond to one another and run parallel to the roller axis Through holes for fasteners, e.g. Tie rods.

Weitere Vorteile und Einzelheiten ergeben sich aus den weiteren Ansprüchen sowie aus der nachfolgenden Beschreibung eines Ausführungsbeispiels. Dabei zeigen

Figur 1
eine Stromrolle in Richtung der Rollenachse gesehen,
Figur 2
einen Schnitt durch die Stromrolle von Fig. 1 entlang der Linie II-II,
Figur 3
einen Schnitt durch die Stromrolle von Fig. 2 entlang der Linie A-A und
Figur 4
einen Schnitt durch die Stromrolle von Fig. 3 entlang der Linie B-B.
Further advantages and details emerge from the further claims and from the following description of an exemplary embodiment. Show
Figure 1
seen a current roller in the direction of the roller axis,
Figure 2
2 shows a section through the current roller of FIG. 1 along the line II-II,
Figure 3
a section through the current roller of Fig. 2 along the line AA and
Figure 4
a section through the current roller of Fig. 3 along the line BB.

Gemäß den Figuren besteht eine Stromrolle für eine elektrolytische Bandbeschichtungsanlage aus einem Rollenmantel 1 und zwei Grundkörpern 2, 3. Der Rollenmantel 1 ist im wesentlichen hohlzylinderförmig und weist eine Innenwand 4 und eine Außenwand 5 auf. Er besteht aus einem säurebeständigen, elektrisch leitfähigen Material, z.B. Edelstahl. An der Innenwand 4 des Rollenmantels 1 ist ein konzentrisch um eine Rollenachse 6 umlaufender Innenring 7 angeschweißt. Ersichtlich ist der Innenring 7 dabei mittig angeordnet.According to the figures, there is a current roller for an electrolytic one Coil coating system from a roll shell 1 and two base bodies 2, 3. The roller shell 1 is essentially hollow cylindrical and has an inner wall 4 and an outer wall 5. It consists of an acid-resistant, electrically conductive material, e.g. Stainless steel. On the inner wall 4 of the roll shell 1 is a concentric welded around a roller axis 6 rotating inner ring 7. As can be seen, the inner ring 7 is arranged centrally.

Die Grundkörper 2, 3 sind im wesentlichen gleich ausgebildet. Sie sind im wesentlichen zylinderförmig, innen hohl und weisen an ihren voneinander abgewandten Seiten Zapfen 8 auf, mittels derer sie in nicht dargestellten Lagern drehbar lagerbar sind. Die Grundkörper 2, 3 bestehen aus Normalstahl. Sie füllen den Rollenmantel 1 im wesentlichen, vorzugsweise sogar paßgenau, aus. Die Grundkörper 2, 3 weisen somit einander zugewandte Seiten 9, voneinander abgewandte Seiten 10 und dem Rollenmantel 1 zugewandte Zylindermäntel 11 auf. The base bodies 2, 3 are of essentially the same design. she are essentially cylindrical, hollow on the inside and point to their sides facing away from each other pins 8, by means of which they in Bearings, not shown, are rotatably supported. The basic body 2, 3 consist of mild steel. You fill the roll jacket 1 in essential, preferably even a perfect fit. The basic body 2, 3 thus have mutually facing sides 9, facing away from one another Pages 10 and the roller jacket 1 facing cylinder jackets 11.

Die Zylindermäntel 11 sind mit einer harten, säurefesten und elektrisch isolierenden Schicht versehen. Die Schicht kann bspw. aus Oxid-Keramik bestehen, in welche zur Vermeidung von Porosität Füllstoffe eingebracht sind. Eine derartige Beschichtung ist kostengünstig und auf einfache Weise aufzubringen. Sie schützt die Zylindermäntel 11 auch vor Korrosion durch eine Kühlflüssigkeit (Wasser) und auch gegen eventuelle elektrolytische Dämpfe. Die Zylindermäntel 11 sind somit elektrisch isolierend ausgebildet.The cylinder jackets 11 are hard, acid-resistant and electric insulating layer. The layer can, for example Oxide ceramics exist in which to avoid porosity Fillers are introduced. Such a coating is inexpensive and easy to apply. It protects the cylinder jackets 11 also against corrosion by a coolant (water) and also against possible electrolytic vapors. The cylinder jackets 11 are thus designed to be electrically insulating.

Aufgrund der Isolierschicht zwischen den Grundkörpern 2, 3 und dem Rollenmantel 1 fließt zwangsweise der gesamte Strom über den Innenring 7 und somit im Rollenmantel 1 symmetrisch von außen zur Mitte, und zwar unabhängig davon, ob der Strom über den einen, den anderen oder beide Zapfen 8 weitergeführt wird.Because of the insulating layer between the base bodies 2, 3 and Roller jacket 1 inevitably flows all of the current through the inner ring 7 and thus in the roller jacket 1 symmetrically from the outside to the center, regardless of whether the current over one or the other or both pins 8 is continued.

Sowohl der Rollenmantel 1 als auch die Grundkörper 2, 3 sind hierbei symmetrisch bezüglich der Achse 6 angeordnet, welche im folgenden auch als Rollenmantelachse bezeichnet wird.Both the roller shell 1 and the base body 2, 3 are here arranged symmetrically with respect to the axis 6, which in the following is also referred to as the roller jacket axis.

Die Grundkörper 2, 3 weisen Durchgangsbohrungen 12 auf. Die Durchgangsbohrungen 12 verlaufen parallel zur Rollenachse 6 und korrespondieren miteinander. In die Durchgangsbohrungen 12 sind bspw. Zugstangen 13 einsteckbar, so daß der Rollenmantel 1 und die Grundkörper 2, 3 durch auf die Zugstangen 13 aufgeschraubte Schraubenmuttern 14 lösbar miteinander verbindbar sind. Dadurch kann gegebenenfalls der Rollenmantel 1 einfach ausgetauscht werden, ohne daß die ganze Stromrolle mechanisch bearbeitet werden muß. Die Ersatzteilhaltung reduziert sich also auf die Rollenmäntel 1.The base bodies 2, 3 have through holes 12. The through holes 12 run parallel to the roller axis 6 and correspond together. In the through holes 12 are, for example. Drawbars 13 can be inserted so that the roller shell 1 and the base body 2, 3 by screw nuts screwed onto the tie rods 13 14 are releasably connectable. This can, if necessary the roller shell 1 can be easily replaced without the whole current roll must be machined. The spare parts inventory is therefore reduced to the roller shells 1.

Die Zylindermäntel 11 der Grundkörper 2, 3 weisen Kühlkanäle 15 für eine Kühlflüssigkeit, z.B. Wasser, auf. Die Kühlkanäle 15 sind als um die Zylindermäntel 11 umlaufende Spiralen ausgebildet. Die Kühlkanäle 15 des einen Grundkörpers 2 sind linksgängig ausgeführt, die des anderen Grundkörpers 3 rechtsgängig. Sie sind im vorliegenden Fall halbkreisförmig. Sie könnten aber auch eine andere Form aufweisen. Der Kühlflüssigkeitskreislauf ist wie folgt: The cylinder jackets 11 of the base body 2, 3 have cooling channels 15 for a cooling liquid, e.g. Water, on. The cooling channels 15 are as spirals formed around the cylinder jackets 11. The Cooling ducts 15 of one base body 2 are designed to run on the left, that of the other base body 3 right-handed. You are in the present Case semi-circular. But you could also use a different shape exhibit. The coolant circuit is as follows:

Die Kühlflüssigkeit wird über eine Speisebohrung 16 in die Stromrolle eingespeist. Die Speisebohrung 16 des einen Grundkörpers 2 liegt auf der Rollenachse 6 und ist an der vom anderen Grundkörper 3 abgewandten Seite 10 des einen Grundkörpers 2 angeordnet. Sodann wird die Kühlflüssigkeit über äußere Radialbohrungen 17 - dargestellt ist in Fig. 2 nur eine - in erste Längsbohrungen 18 eingespeist. Die äußeren Radialbohrungen 17 sind ebenfalls an der vom anderen Grundkörper 3 abgewandten Seite 10 des einen Grundkörpers 2 angeordnet. Die ersten Längsbohrungen 18 verlaufen unterhalb der Kühlkanäle 15 parallel zur Rollenachse 6 und sind zum Innenring 7 hin offen. Die äußeren Radialbohrungen 17 des einen Grundkörpers 2 sind weiterhin zwischen den Kühlkanälen 15 und den ersten Längsbohrungen 18 verschlossen, z.B. zugeschweißt oder durch Eindrehen eines Gewindestopfens.The cooling liquid is fed into the current roller via a feed bore 16 fed. The feed bore 16 of one base body 2 is located on the roller axis 6 and is on the other base body 3rd Side 10 facing away from a base body 2. thereupon the cooling liquid is shown via outer radial bores 17 - is only one in Fig. 2 - fed into the first longitudinal bores 18. The outer radial bores 17 are also on the another base body 3 facing away from side 10 of one base body 2 arranged. The first longitudinal bores 18 run below the Cooling channels 15 parallel to the roller axis 6 and are to the inner ring 7 open towards. The outer radial bores 17 of one body 2 are still between the cooling channels 15 and the first longitudinal bores 18 closed, e.g. welded or screwed in a threaded plug.

Der andere Grundkörper 3 weist ebenfalls erste Längsbohrungen 19 auf, auf die später noch eingegangen wird. Weiterhin weist er aber auch zweite, zum Innenring 7 hin offene Längsbohrungen 20 auf, die ebenfalls parallel zur Rollenachse 6 verlaufen. Die ersten Längsbohrungen 18 des einen Grundkörpers 2 sind mit den zweiten Längsbohrungen 20 des anderen Grundkörpers 3 über Durchgangsbohrungen 21 verbunden, welche im Innenring 7 angeordnet sind. Die Grundkörper 2, 3 weisen ferner innere Radialbohrungen 22 auf, die an den einander zugewandten Seiten 9 der Grundkörper 2, 3 angeordnet sind. Die inneren Radialbohrungen 22 verbinden die ersten Längsbohrungen 18 des einen Grundkörpers 2 bzw. die zweiten Längsbohrungen 20 des anderen Grundkörpers 3 mit den Kühlkanälen 15.The other base body 3 also has first longitudinal bores 19 which will be discussed later. But he still points also second, open to the inner ring 7 towards the longitudinal bores 20, the also run parallel to the roller axis 6. The first longitudinal holes 18 of one base body 2 are with the second longitudinal bores 20 of the other base body 3 via through holes 21 connected, which are arranged in the inner ring 7. The basic body 2, 3 also have inner radial bores 22, which on each other facing sides 9 of the base body 2, 3 are arranged. The inner radial bores 22 connect the first longitudinal bores 18 of one base body 2 or the second longitudinal bores 20 of the other base body 3 with the cooling channels 15.

Auf diesem Weg kann die Kühlflüssigkeit, z.B. Wasser, in die Kühlkanäle 15 eingespeist werden. Es läuft dann spiralförmig vom Innenring 7 des Rollenmantels 1 zu dessen äußeren Enden.In this way the cooling liquid, e.g. Water into the cooling channels 15 can be fed. It then runs in a spiral from the inner ring 7 of the roll shell 1 to its outer ends.

Zum Ausspeisen der Kühlflüssigkeit aus den Kühlkanälen 15 weist der eine Grundkörper 2 an der vom anderen Grundkörper 3 abgewandten Seite 10 weitere äußere Radialbohrungen 23 auf, die sich von den Kühlkanälen 15 bis zu zweiten Längsbohrungen 24 des einen Grundkörpers 2 erstrecken. Diese zweiten Längsbohrungen 24 des einen Grundkörpers 2 verlaufen ebenfalls parallel zur Rollenachse 6. Sie sind zum Innenring 7 hin offen und erstrecken sich bis kurz vor die vom anderen Grundkörper 3 abgewandte Seite 10 des einen Grundkörpers 2. Sie sind über weitere im Innenring 7 angeordnete Durchgangsbohrungen 25 mit den bereits erwähnten ersten Längsbohrungen 19 des anderen Grundkörpers 3 verbunden.To withdraw the cooling liquid from the cooling channels 15, the a base body 2 on the side facing away from the other base body 3 Page 10 further outer radial bores 23, which differ from the Cooling channels 15 up to second longitudinal bores 24 of one base body 2 extend. These second longitudinal bores 24 of one base body 2 also run parallel to the roller axis 6. They are open to the inner ring 7 and extend until shortly before the another base body 3 facing away from side 10 of one base body 2. They are via further through holes arranged in the inner ring 7 25 with the already mentioned first longitudinal bores 19 of the other base body 3 connected.

Die ersten Längsbohrungen 19 des anderen Grundkörpers 3 verlaufen ebenfalls unterhalb der Kühlkanäle 15 parallel zur Rollenachse 6 und sind zum Innenring 7 hin offen. Sie sind über äußere Radialbohrungen 26 einerseits mit den Kühlkanälen 15 und andererseits mit einer Speisebohrung 27 verbunden. Die äußeren Radialbohrungen 26 des anderen Grundkörpers 3 sind, wie bereits der Name sagt, an der vom einen Grundkörper 2 abgewandten Seite 10 des anderen Grundkörpers 3 angeordnet. Die Speisebohrung 27 ist im anderen Grundkörper 3 angeordnet und liegt auf der Rollenachse 6. Von dieser Speiseöffnung 27 aus kann das Kühlwasser aus der Stromrolle ausgespeist werden.The first longitudinal bores 19 of the other base body 3 run also below the cooling channels 15 parallel to the roller axis 6 and are open to the inner ring 7. They are about outer radial holes 26 on the one hand with the cooling channels 15 and on the other hand with a feed bore 27 connected. The outer radial bores 26 of the other base body 3, as the name suggests, on the side 10 of the other base body facing away from a base body 2 3 arranged. The feed hole 27 is in the other base body 3 arranged and lies on the roller axis 6. From this feed opening 27 from the cooling water can be fed out of the current roller become.

Mit der obenstehend beschriebenen Kühlflüssigkeitsführung wird die frische, kalte Kühlflüssigkeit dem zentralen Teil des Rollenmantels 1 zuerst angeboten. Da ferner in diesem Mantelteil der größte Strom fließt und dieser Mantelteil folglich auch am wärmsten wird, wird somit die Stelle der stärksten Erwärmung am intensivsten gekühlt. In diesem Fall bleibt die Zylindrizität des Rollenmantels 1 am besten erhalten.With the coolant guide described above, the fresh, cold coolant the central part of the roll jacket 1 offered first. Since also the largest current in this jacket part flows and this part of the jacket is consequently the warmest thus the place of strongest warming is most intensely cooled. In this case, the cylindricity of the roll shell 1 remains best received.

Es ist aber auch möglich, die Kühlflüssigkeit umgekehrt zu führen. In diesem Fall erreicht man eine Bombierung der Stromrolle. Dies kann für den Bandlauf vorteilhaft sein.But it is also possible to reverse the coolant. In this case, the current roller is cambered. This can be beneficial for tape running.

Die notwendigen Abdichtungen gegen Kühlflüssigkeitsaustritt und Elektrolyteintritt übernehmen übliche O-Ringe 28, welche bei Bedarf leicht ausgetauscht werden können. The necessary seals against coolant leakage and Electrolyte entry is carried out by conventional O-rings 28, which if necessary can be easily replaced.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
Rollenmantelroller shell
2,32.3
Grundkörperbody
44
Innenwandinner wall
55
Außenwandouter wall
66
Rollenachse/RollenmantelachseRoller axis / roll shell axis
77
Innenringinner ring
88th
Zapfenspigot
99
einander zugewandte Seitensides facing each other
1010
voneinander abgewandte Seitensides facing away from each other
1111
Zylindermäntelcylinder jackets
12,21,2512,21,25
DurchgangsbohrungenThrough holes
1313
Zugstangendrawbars
1414
Schraubenmutternnuts
1515
Kühlkanälecooling channels
16,2716.27
Speisebohrungenfeed holes
17,2617.26
äußere Radialbohrungenouter radial bores
18,1918.19
erste Längsbohrungenfirst longitudinal holes
20,2420.24
zweite Längsbohrungensecond longitudinal holes
2222
innere Radialbohrungeninner radial bores
2323
weitere äußere Radialbohrungenfurther outer radial bores
2828
O-RingeO-rings

Claims (15)

  1. Conducting roller for an electrolytic strip coating plant, with a roller axis (6), wherein the conducting roller consists of a roller circumferential casing (1) with an inner wall (4) and an outer wall (5), which is fastened around the outer surfaces of two mutually opposite and coaxially arranged cylindrical base bodies (2, 3), wherein the base bodies (2, 3) are detachably connected together and the cylinder circumferential casings (11) of the base bodies (2, 3) have cooling channels (15) for a cooling liquid.
  2. Conducting roller according to claim 1, characterised in that the base bodies (2, 3) consist of normal steel and the roller circumferential casing (1) consists of an acid-resistant and electrically conductive material, for example high-quality steel.
  3. Conducting roller according to claim 1 or 2, characterised in that the cylinder circumferential casings (11) of the base bodies (2, 3) are constructed to be electrically insulating.
  4. Conducting roller according to claim 3, characterised in that the cylinder circumferential casings (11) are provided with a hard, acid-proof, electrically insulating coating.
  5. Conducting roller according to one of the above claims, characterised in that the base bodies (2, 3) and the roller circumferential casing (1) are connected together with precise fit.
  6. Conducting roller according to one of the above claims, characterised in that an inner ring (7) encircling concentrically around the roller axis (6) is arranged at the inner wall (4) of the roller circumferential casing (1).
  7. Conducting roller according to claim 6, characterised in that the inner ring (7) is welded to the roller circumferential casing (1).
  8. Conducting roller according to claim 6 or 7, characterised in that the base bodies (2, 3) have mutually corresponding passage bores (12), which extend parallel to the roller axis (6), for fastening elements (13), for example tie rods (13).
  9. Conducting roller according to one of the above claims, characterised in that
    the cooling channels (15) are formed as helices encircling the cylinder circumferential casings (11),
    the base bodies (2, 3) have at the mutually remote sides (10) thereof feed bores (16, 27), which lie on the roller axis (6), for feeding in and feeding out the cooling liquid,
    the base bodies (2, 3) have at the mutually remote sides (10) thereof at least one respective outer radial bore (17, 26) connected with the respective feed bore (16, 27),
    the base bodies (2, 3) have below the cooling channels (15) at least one respective first longitudinal bore (18, 19) which is connected with the outer radial bores (16, 27) and is open towards the inner ring (7) and which extends parallel to the roller axis (6),
    in the case of one of the base bodies (2) the at least one outer radial bore (17) is closed between the cooling channels (15) and the at least one first longitudinal bore (18),
    the one base body (2) has at its side (9), which faces the other base body (3), at least one inner radial bore (22) connected with the at least one first longitudinal bore (18),
    the one base body (2) has at least one second longitudinal bore (24) which is open towards the inner ring (7) and extends parallel to the roller axis (6) and which runs up to the side (10) of the one base body (2) remote from the other base body (3) and is connected with the at least one first longitudinal bore (19) of the other base body (3) by way of a first passage bore (21) arranged in the inner ring (7),
    the one base body (2) has at the side (10) remote from the other base body (3) at least one further outer radial bore (23) which extends from the cooling channels (15) to the at least one second longitudinal bore (24),
    the other base body (3) has at least one second longitudinal bore (20) which is open towards the inner ring (7) and extends parallel to the roller axis (6) and which is connected with the at least one first longitudinal bore (18) of the one base body (2) by way of a second passage bore (25) arranged in the inner ring (7) and
    the at least one second longitudinal bore (20) of the other base body (3) is connected with the cooling channels (15) by way of at least one inner radial bore (22) arranged at the side (9) of the other base body (3) facing the one base body (2).
  10. Method of cooling a conducting roller according to claim 9, characterised in that the cooling liquid is fed into the cooling channels (15) at the mutually facing sides (9) of the base bodies (2, 3) and is fed out of the cooling channels (15) at the mutually remote sides (10) of the base bodies (2, 3).
  11. Method of cooling a conducting roller according to claim 9, characterised in that the cooling liquid is fed into the cooling channels (15) at the mutually remote sides (10) of the base bodies (2, 3) and fed out of the cooling channels (15) at the mutually facing sides (9) of the base bodies (2, 3).
  12. Roller circumferential casing for a conducting roller for an electrolytic coating plant, with a roller circumferential casing axis (6), an inner wall (4) and an outer wall (5), consisting of an acid-proof and electrically conductive material, for example high-quality steel, characterised in that an inner ring (7) arranged concentrically with respect to the roller circumferential casing axis (6) is arranged centrally at the inner wall (4) of the roller circumferential casing (1).
  13. Roller circumferential casing according to claim 12, characterised in that the inner ring (7) is welded to the roller circumferential casing (1).
  14. Roller circumferential casing according to claim 12 or 13, characterised in that the inner ring (7) has passage bores (12), which extend parallel to the roller circumferential casing axis (6), for fastening elements (13), for example tie rods (13).
  15. Roller circumferential casing according to claim 12, 13 or 14, characterised in that the inner ring (7) has at least two passage bores (21, 25), which extend parallel to the roller circumferential casing axis (6), for a cooling liquid.
EP98120151A 1997-10-28 1998-10-27 Conducting roll for a strip coating installation Expired - Lifetime EP0915188B1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE19747429 1997-10-28
DE19747429 1997-10-28
DE19804257 1998-02-04
DE19804257A DE19804257A1 (en) 1997-10-28 1998-02-04 Current roll for an electrolytic coil coating system

Publications (3)

Publication Number Publication Date
EP0915188A2 EP0915188A2 (en) 1999-05-12
EP0915188A3 EP0915188A3 (en) 1999-05-19
EP0915188B1 true EP0915188B1 (en) 2004-06-16

Family

ID=26041131

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98120151A Expired - Lifetime EP0915188B1 (en) 1997-10-28 1998-10-27 Conducting roll for a strip coating installation

Country Status (9)

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US (1) US6572517B1 (en)
EP (1) EP0915188B1 (en)
JP (1) JPH11200089A (en)
CN (1) CN1145719C (en)
AT (1) ATE269433T1 (en)
BR (1) BR9804287A (en)
CA (1) CA2251119A1 (en)
ES (1) ES2221108T3 (en)
TW (1) TW422895B (en)

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Publication number Priority date Publication date Assignee Title
ES2280276T3 (en) * 2000-03-14 2007-09-16 Walzen Irle Gmbh ROTARY ROLLER.
WO2004030802A2 (en) * 2002-10-03 2004-04-15 Kreido Laboratories Apparatus for transfer of heat energy between a body surface and heat transfer fluid
CN102703959B (en) * 2012-06-21 2015-02-25 周建元 Copper bar continuous travelling tinning method and equipment
AT514625B1 (en) * 2013-07-24 2018-07-15 Primetals Technologies Austria GmbH Chilled strand guide roller
JP7101229B2 (en) * 2019-12-10 2022-07-14 エスケー ネクシリス カンパニー リミテッド Cathode assembly for plating equipment
TWI785730B (en) * 2021-08-11 2022-12-01 大陸商常州欣盛半導體技術股份有限公司 Cathode wheel

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US2526312A (en) 1946-03-07 1950-10-17 Carnegie Illinois Steel Corp Contact roll for electroplating
DE3231433C2 (en) * 1982-08-20 1985-07-11 Mannesmann AG, 4000 Düsseldorf Internally cooled support and / or transport roller and process for their production
DE3564140D1 (en) * 1984-03-24 1988-09-08 Klaus Reinhold Roll for processing a flat web-like material
DE3534360A1 (en) * 1985-09-26 1987-03-26 Roland Schnetteler Method for producing a current-conducting roller, and a roller produced in accordance with this method
JPS63106682A (en) * 1986-10-23 1988-05-11 Hitachi Metals Ltd Heat roll for electrophotography
FI91297C (en) * 1992-02-24 1994-06-10 Valmet Paper Machinery Inc Heatable roller
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AUPN811396A0 (en) * 1996-02-16 1996-03-07 Bhp Steel (Jla) Pty Limited Roll cooling structure for twin roll continuous caster
US5983993A (en) * 1996-08-30 1999-11-16 International Paper Company High production chill roll
WO1998031194A1 (en) * 1997-01-13 1998-07-16 American Roller Company Heated roller with integral heat pipe
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DE19957847C5 (en) * 1999-12-01 2010-05-12 Shw Casting Technologies Gmbh Roller for the thermal and mechanical treatment of a web-shaped product

Also Published As

Publication number Publication date
EP0915188A2 (en) 1999-05-12
ATE269433T1 (en) 2004-07-15
CN1145719C (en) 2004-04-14
BR9804287A (en) 1999-12-14
EP0915188A3 (en) 1999-05-19
TW422895B (en) 2001-02-21
US6572517B1 (en) 2003-06-03
CA2251119A1 (en) 1999-04-28
CN1227283A (en) 1999-09-01
ES2221108T3 (en) 2004-12-16
JPH11200089A (en) 1999-07-27

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