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EP2117716B1 - Method for reconditioning a used grinding roller - Google Patents

Method for reconditioning a used grinding roller Download PDF

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Publication number
EP2117716B1
EP2117716B1 EP07857825A EP07857825A EP2117716B1 EP 2117716 B1 EP2117716 B1 EP 2117716B1 EP 07857825 A EP07857825 A EP 07857825A EP 07857825 A EP07857825 A EP 07857825A EP 2117716 B1 EP2117716 B1 EP 2117716B1
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EP
European Patent Office
Prior art keywords
material layer
roller body
worn
turned
roller
Prior art date
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Active
Application number
EP07857825A
Other languages
German (de)
French (fr)
Other versions
EP2117716A1 (en
Inventor
Norbert Patzelt
Johann Knecht
Herbert Pingel
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.)
ThyssenKrupp Industrial Solutions AG
Original Assignee
Polysius AG
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Publication date
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C4/00—Crushing or disintegrating by roller mills
    • B02C4/28—Details
    • B02C4/30—Shape or construction of rollers
    • B02C4/305—Wear resistant rollers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49544—Roller making
    • Y10T29/49545—Repairing or servicing
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49544—Roller making
    • Y10T29/4956—Fabricating and shaping roller work contacting surface element
    • Y10T29/49561—Fabricating and shaping roller work contacting surface element toothed roller
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49718—Repairing
    • Y10T29/49721—Repairing with disassembling
    • Y10T29/49723—Repairing with disassembling including reconditioning of part
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49718—Repairing
    • Y10T29/49721—Repairing with disassembling
    • Y10T29/49723—Repairing with disassembling including reconditioning of part
    • Y10T29/49725—Repairing with disassembling including reconditioning of part by shaping
    • Y10T29/49726—Removing material

Definitions

  • the invention relates to a process for the reprocessing of a used grinding roller of a high-pressure good bed roller mill according to the preamble of claim 1.
  • Grinding rolls of this type are for example by the EP 0 516 952 B1 known. They contain a plurality of wear-resistant profile body, which are incorporated with part of their length in holes of the roller body and protrude with the remaining part of its length over the surface of the roller body. In the operation of such rolls, the spaces between the above profile bodies fill with the comminuted material fed to the good bed roller mill, which thus results in a certain autogenous wear protection for the surface of the roller body.
  • Both the protruding profile body and the surface of the roller body during the operating time are subject to an inevitable wear, which makes a reprocessing of the grinding roller required if the roll body is to be used further.
  • a grinding roll is known in which the hardness of the roll surface forming material of the roll body is greater than 56 HRc (hardness according to Rockwell).
  • This grinding roller is used in the crushing operation until a substantial part of all profile body has worn out completely and / or has fallen out of the roll body.
  • the reprocessing of the used grinding roller is then carried out in such a way that the roll surface is brought back into a cylindrical shape by completely turning off the profiled body and the original holes, after which new holes are produced and inserted into these holes new profile body.
  • the invention is therefore based on the object, a method according to the preamble of claim 1 in such a way that a cost-effective reprocessing of a used grinding roller is achieved.
  • the worn surface of the roller body is turned off at least in a partial region of the width of the roller body when a certain state of wear is reached. Then, in a welding process, a material layer for increasing the diameter is applied at least to the turned-off surface.
  • the welded-on material layer is then provided with holes for receiving new profile body.
  • these bores can either be provided only in the welded-on material layer or extend into the base material of the roller body lying beneath this material layer.
  • the worn surface of a roller body can be equalized even with different degree of wear of the individual sections with the least possible material and labor.
  • the inventive method is thus characterized by a time and material-saving, cost-effective reprocessing of a used grinding roller.
  • Fig. 1 shows on the right the worn condition after a certain operating time.
  • the surface 1'a of the roller body 1 ' is now - different in the individual Areas - more or less eroded.
  • the profile body 12 ', 13', 14 ' shortened by the wear compared to the original length (contour line 15).
  • Fig. 2 illustrates how a used grinding roller according to a first variant of the method according to the invention can be worked up again.
  • Fig. 1 On the left is the hand of Fig. 1 already described worn condition of the roller body 1 'and the profile body 12', 13 ', 14' shown.
  • the worn profile bodies 12 ', 13', 14 ' are first removed.
  • the worn surface 1 'a of the roller body 1' is turned off to a diameter D.
  • the diameter D in this embodiment is smaller than the diameter of the bottom of the holes 2, 3, 4. These old holes are thus completely removed by the twisting.
  • a material layer 16 is applied to the widened surface 1'b of the roll body 1 in a welding operation to increase the diameter.
  • This material layer 16 is then provided with holes 22, 23, 24 for receiving new profile body 32, 33, 34.
  • FIG. 3 shown further embodiment left again the worn state and right the state after reprocessing shown.
  • the differently worn surface 1'a of the roll body 1' in the edge regions of the width of the roll body ie here in the areas in which the profile body 12 ', 13 'were turned off (except here in the region of the profile body 14') to the diameter D 'of the most heavily worn portion.
  • Fig. 4 shows a modification of the variant according to Fig. 3 ,
  • material layers 26a, 26b, 26c (in each case in a plurality of layers) are applied to the leveled surface 1'c of the roll body 1 ', which - viewed across the width of the roll body 1' - may have different hardness, thickness and wear properties.
  • the holes 22, 23, 24 are provided for receiving the new profile body 32, 33, 34 exclusively in the welded material layer 16 or 26 or 26 a, 26 b, 26 c shows Fig. 5 a variant of the embodiment according to Fig. 4 in which the bores 42, 43, 44 for receiving the new profiled bodies 32, 33, 34 are passed through the welded-on material layer 26 'and extend into the base material of the roller body 1' located below this material layer 26 '.
  • the thickness of the welded-on material layer 26 ' can be kept significantly smaller than in the variant according to FIG Fig. 3 ,
  • the roll body does not always have to have a uniform diameter over the entire length of the roll body. It can be rather for individual sections are selected different diameters, such as when the edge area is only slightly worn and therefore no welding is performed here.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)
  • Grinding Of Cylindrical And Plane Surfaces (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Disintegrating Or Milling (AREA)

Abstract

The invention relates to a method for reconditioning a used grinding roller of a material bed roller mill having profile-members which are embedded, with a portion of the length thereof, in holes of the roller body and, with the remainder of the length thereof, project above the surface of the roller body. For the reconditioning operation, after the worn profile-members are removed, the worn surface of the roller body is turned, and a material layer is applied in a welding operation and is provided with holes for receiving new profile-members. Such a method allows particularly cost-effective reconditioning.

Description

Die Erfindung betrifft ein Verfahren zur Wiederaufarbeitung einer gebrauchten Mahlwalze einer Hochdruck-Gutbettwalzenmühle entsprechend dem Oberbegriff des Anspruches 1.The invention relates to a process for the reprocessing of a used grinding roller of a high-pressure good bed roller mill according to the preamble of claim 1.

Mahlwalzen dieser Art sind beispielsweise durch die EP 0 516 952 B1 bekannt. Sie enthalten eine Vielzahl verschleißfester Profilkörper, die mit einem Teil ihrer Länge in Bohrungen des Walzenkörpers eingelagert sind und mit dem übrigen Teil ihrer Länge über die Oberfläche des Walzenkörpers vorstehen. Im Betrieb derartiger Walzen füllen sich die Zwischenräume zwischen den vorstehenden Profilkörpern mit dem der Gutbettwalzenmühle aufgegebenen Zerkleinerungsgut, das damit einen gewissen autogenen Verschleißschutz für die Oberfläche des Walzenkörpers ergibt.Grinding rolls of this type are for example by the EP 0 516 952 B1 known. They contain a plurality of wear-resistant profile body, which are incorporated with part of their length in holes of the roller body and protrude with the remaining part of its length over the surface of the roller body. In the operation of such rolls, the spaces between the above profile bodies fill with the comminuted material fed to the good bed roller mill, which thus results in a certain autogenous wear protection for the surface of the roller body.

Dabei unterliegen sowohl die vorstehenden Profilkörper als auch die Oberfläche des Walzenkörpers im Laufe der Betriebszeit einem unvermeidlichen Verschleiß, der eine Wiederaufarbeitung der Mahlwalze erforderlich macht, wenn der Walzenkörper weiter verwendet werden soll.Both the protruding profile body and the surface of the roller body during the operating time are subject to an inevitable wear, which makes a reprocessing of the grinding roller required if the roll body is to be used further.

Durch die DE 196 18 143 A1 ist eine Mahlwalze bekannt, bei der die Härte des die Walzenoberfläche bildenden Materiales des Walzenkörpers größer als 56 HRc (Härte gemäß Rockwell) ist. Diese Mahlwalze wird so lange im Zerkleinerungsbetrieb verwendet, bis ein wesentlicher Teil aller Profilkörper vollständig verschlissen und/oder aus dem Walzenkörper herausgefallen ist. Die Wiederaufarbeitung der gebrauchten Mahlwalze erfolgt dann in der Weise, dass die Walzenoberfläche durch vollständiges Abdrehen der Profilkörper und der ursprünglichen Bohrungen wieder in eine zylindrische Form gebracht wird, wonach neue Bohrungen hergestellt und in diese Bohrungen neue Profilkörper eingesetzt werden.By the DE 196 18 143 A1 a grinding roll is known in which the hardness of the roll surface forming material of the roll body is greater than 56 HRc (hardness according to Rockwell). This grinding roller is used in the crushing operation until a substantial part of all profile body has worn out completely and / or has fallen out of the roll body. The reprocessing of the used grinding roller is then carried out in such a way that the roll surface is brought back into a cylindrical shape by completely turning off the profiled body and the original holes, after which new holes are produced and inserted into these holes new profile body.

Durch die Verwendung eines außerordentlich harten Grundwerkstoffes für die Oberfläche des Walzenkörpers wird zwar erreicht, dass diese Oberfläche etwa nur im gleichen Maße wie die vorstehenden Profilkörper verschleißt. Bei der Wiederaufarbeitung einer gebrauchten Mahlwalze dieser Art bedingt jedoch das vollständige Abdrehen der mit Bohrungen versehenen Oberfläche des Walzenkörpers wegen der hohen Härte des Oberflächenmateriales einen beträchtlichen Aufwand.By using an extremely hard base material for the surface of the roller body is indeed achieved that this surface approximately only in the same extent as the above profile body wears. In the reprocessing of a used grinding roller of this type, however, the complete turning off the provided with bores surface of the roll body due to the high hardness of the surface material a considerable effort.

Der Erfindung liegt daher die Aufgabe zu Grunde, ein Verfahren entsprechend dem Oberbegriff des Anspruches 1 so auszubilden, dass eine kostengünstige Wiederaufarbeitung einer gebrauchten Mahlwalze erreicht wird.The invention is therefore based on the object, a method according to the preamble of claim 1 in such a way that a cost-effective reprocessing of a used grinding roller is achieved.

Diese Aufgabe wird erfindungsgemäß durch die kennzeichnenden Merkmale des Anspruches 1 gelöst. Zweckmäßige Ausgestaltungen der Erfindung sind Gegenstand der Unteransprüche.This object is achieved by the characterizing features of claim 1. Advantageous embodiments of the invention are the subject of the dependent claims.

Bei dem erfindungsgemäßen Verfahren wird beim Erreichen eines bestimmten Verschleißzustandes die verschlissene Oberfläche des Walzenkörpers zumindest in einem Teilbereich der Breite des Walzenkörpers abgedreht. Sodann wird in einem Schweißvorgang eine Materialschicht zur Durchmesservergrößerung mindestens auf die abgedrehte Oberfläche aufgebracht.In the method according to the invention, the worn surface of the roller body is turned off at least in a partial region of the width of the roller body when a certain state of wear is reached. Then, in a welding process, a material layer for increasing the diameter is applied at least to the turned-off surface.

In einem weiteren Arbeitsschritt wird die aufgeschweißte Materialschicht sodann mit Bohrungen zur Aufnahme neuer Profilkörper versehen. Je nach der Stärke der aufgeschweißten Materialschicht und der gewünschten Verankerungstiefe der neuen Profilkörper können diese Bohrungen entweder nur in der aufgeschweißten Materialschicht vorgesehen werden oder bis in den unter dieser Materialschicht liegenden Grundwerkstoff des Walzenkörpers hineinreichen.In a further step, the welded-on material layer is then provided with holes for receiving new profile body. Depending on the thickness of the welded-on material layer and the desired anchoring depth of the new profile body, these bores can either be provided only in the welded-on material layer or extend into the base material of the roller body lying beneath this material layer.

Die zweckmäßige Auswahl der abzudrehenden Teilbereiche, die Wahl der Abdrehtiefe sowie die Stärke der in den einzelnen Teilbereichen aufgeschweißten Materialschichten hängen vor allem von der jeweiligen Verschleißsituation ab.The appropriate selection of abzudrehenden sections, the choice of the calibration depth and the strength of the welded in the individual sections material layers depend mainly on the respective wear situation.

So kann es sinnvoll sein, wenn weniger stark verschlissene Teilbereiche bis auf den Durchmesser des am stärksten verschlissenen Teilbereiches abgedreht werden und dann eine gemeinsame Materialschicht auf diese unterschiedlich verschlissenen Teilbereiche aufgebracht wird.So it may be useful if less severely worn portions are turned off to the diameter of the most worn portion and then a common layer of material is applied to these differently worn portions.

Statt dessen ist es jedoch auch möglich, unterschiedlich stark verschlissene Teilbereiche unterschiedlich abzudrehen und sodann auf die Oberfläche dieser Teilbereiche unterschiedlich starke Materialschichten zur Erzielung eines gleichmäßigen Außendurchmessers aufzuschweißen.Instead, however, it is also possible to turn off differently severely worn portions differently and then to weld on the surface of these portions differently thick layers of material to achieve a uniform outer diameter.

Schließlich kann es bei einer entsprechenden Verschleißsituation auch vorteilhaft sein, wenn nur der am stärksten verschlissene Teilbereich abgedreht und nur auf diesen abgedrehten Teilbereich eine Materialschicht aufgeschweißt wird.Finally, with a corresponding wear situation, it may also be advantageous if only the most heavily worn portion is turned off and a material layer is welded onto this wrenched portion only.

Durch die erfindungsgemäßen Maßnahmen kann daher die verschlissene Oberfläche eines Walzenkörpers auch bei unterschiedlichem Verschleißgrad der einzelnen Teilbereiche mit dem geringstmöglichen Material- und Arbeitsaufwand wieder egalisiert werden. Das erfindungsgemäße Verfahren zeichnet sich somit durch eine zeit- und materialsparende, kostengünstige Wiederaufarbeitung einer gebrauchten Mahlwalze aus.By the measures according to the invention, therefore, the worn surface of a roller body can be equalized even with different degree of wear of the individual sections with the least possible material and labor. The inventive method is thus characterized by a time and material-saving, cost-effective reprocessing of a used grinding roller.

Einige Ausführungsbeispiele der Erfindung sind in der Zeichnung dargestellt.

  • Fig. 1 zeigt (in einem schematischen Längs-Teilschnitt durch die Walze) links den Neuzustand der Walze. Der Walzenkörper 1 ist mit einer Vielzahl von Bohrungen 2, 3, 4 versehen, in die Profilkörper 12, 13, 14 jeweils mit einem Teil ihrer Länge (z.B.
  • 12a) eingelagert sind, während sie mit dem übrigen Teil ihrer Länge (z.B. 12b) über die Oberfläche 1a des Walzenkörper 1 vorstehen.
Some embodiments of the invention are shown in the drawing.
  • Fig. 1 shows (in a schematic longitudinal partial section through the roller) left the new condition of the roller. The roller body 1 is provided with a plurality of holes 2, 3, 4, in the profile body 12, 13, 14 each with a part of their length (eg
  • 12a) while they protrude with the remaining part of their length (eg 12b) over the surface 1a of the roll body 1.

Fig. 1 zeigt rechts den verschlissenen Zustand nach einer gewissen Betriebszeit. Die Oberfläche 1'a des Walzenkörpers 1' ist nun - unterschiedlich in den einzelnen Bereichen - mehr oder weniger stark abgetragen. Ebenso sind jetzt die Profilkörper 12', 13', 14' durch den Verschleiß gegenüber der ursprünglichen Länge (Höhenlinie 15) verkürzt. Fig. 1 shows on the right the worn condition after a certain operating time. The surface 1'a of the roller body 1 'is now - different in the individual Areas - more or less eroded. Likewise, now the profile body 12 ', 13', 14 'shortened by the wear compared to the original length (contour line 15).

Fig. 2 veranschaulicht, wie eine gebrauchte Mahlwalze gemäß einer ersten Variante des erfindungsgemäßen Verfahrens wieder aufgearbeitet werden kann. Links ist der an Hand von Fig. 1 bereits beschriebene verschlissene Zustand des Walzenkörpers 1' und der Profilkörper 12', 13', 14' dargestellt. Zur Aufarbeitung werden zunächst die verschlissenen Profilkörper 12', 13', 14' entfernt. Dann wird die verschlissene Oberfläche 1' a des Walzenkörpers 1' bis auf einen Durchmesser D abgedreht. Der Durchmesser D ist bei diesem Ausführungsbeispiel kleiner als der Durchmesser des Grundes der Bohrungen 2, 3, 4. Diese alten Bohrungen werden somit durch das Abdrehen vollständig entfernt. Fig. 2 illustrates how a used grinding roller according to a first variant of the method according to the invention can be worked up again. On the left is the hand of Fig. 1 already described worn condition of the roller body 1 'and the profile body 12', 13 ', 14' shown. For workup, the worn profile bodies 12 ', 13', 14 'are first removed. Then, the worn surface 1 'a of the roller body 1' is turned off to a diameter D. The diameter D in this embodiment is smaller than the diameter of the bottom of the holes 2, 3, 4. These old holes are thus completely removed by the twisting.

Anschließend wird auf die abgedrehte Oberfläche 1'b des Walzenkörpers 1 in einem Schweißvorgang eine Materialschicht 16 zur Durchmesservergrößerung aufgebracht. Diese Materialschicht 16 wird dann mit Bohrungen 22, 23, 24 zur Aufnahme neuer Profilkörper 32, 33, 34 versehen.Subsequently, a material layer 16 is applied to the widened surface 1'b of the roll body 1 in a welding operation to increase the diameter. This material layer 16 is then provided with holes 22, 23, 24 for receiving new profile body 32, 33, 34.

Bei dem in Fig. 3 dargestellten weiteren Ausführungsbeispiel ist links wiederum der verschlissene Zustand und rechts der Zustand nach der Wiederaufarbeitung dargestellt. Hierbei wurde nach dem Entfernen aller Profilkörper 12', 13', 14' die unterschiedlich stark verschlissene Oberfläche 1'a des Walzenkörpers 1' in den Randbereichen der Breite des Walzenkörpers (d.h. hier in den Bereichen, in denen sich die Profilkörper 12', 13' befanden) bis auf den Durchmesser D' des am stärksten verschlissenen Teilbereiches (d.h. hier im Bereich der Profilkörper 14') abgedreht.At the in Fig. 3 shown further embodiment left again the worn state and right the state after reprocessing shown. In this case, after the removal of all profiled bodies 12 ', 13', 14 ', the differently worn surface 1'a of the roll body 1' in the edge regions of the width of the roll body (ie here in the areas in which the profile body 12 ', 13 'were turned off (except here in the region of the profile body 14') to the diameter D 'of the most heavily worn portion.

Auf die so entstandene, weitgehend egalisierte Oberfläche 1'c werden sodann in einem Schweißvorgang mehrere Lagen einer Materialschicht 26 aufgebracht. Danach wird diese Materialschicht 26 mit Bohrungen 22, 23, 24 versehen, in die neue Profilkörper 32, 33, 34 eingesetzt werden.Several layers of a material layer 26 are then applied to the resulting, largely leveled surface 1'c in one welding operation. Thereafter, this material layer 26 is provided with bores 22, 23, 24, in the new profile body 32, 33, 34 are used.

Fig. 4 zeigt eine Abwandlung der Variante gemäß Fig. 3. Hierbei werden auf die egalisierte Oberfläche 1'c des Walzenkörpers 1' Materialschichten 26a, 26b, 26c (jeweils in mehreren Lagen) aufgebracht, die - über die Breite des Walzenkörpers 1' betrachtet - unterschiedliche Härte, Dicke und Verschleißeigenschaften aufweisen können. Damit kann man insbesondere den unterschiedlichen Verschleißbeanspruchungen Rechnung tragen, die im Betrieb in den einzelnen Teilbereichen der Breite des Walzenkörpers auftreten. Fig. 4 shows a modification of the variant according to Fig. 3 , In this case, material layers 26a, 26b, 26c (in each case in a plurality of layers) are applied to the leveled surface 1'c of the roll body 1 ', which - viewed across the width of the roll body 1' - may have different hardness, thickness and wear properties. In particular, it is possible to take account of the different wear stresses which occur in operation in the individual subregions of the width of the roller body.

Während bei den an Hand der Fig. 2 bis 4 erläuterten Ausführungsbeispielen die Bohrungen 22, 23, 24 für die Aufnahme der neuen Profilkörper 32, 33, 34 ausschließlich in der aufgeschweißten Materialschicht 16 bzw. 26 bzw. 26a, 26b, 26c vorgesehen sind, zeigt Fig. 5 eine Variante der Ausführung gemäß Fig. 4, bei der die Bohrungen 42, 43, 44 zur Aufnahme der neuen Profilkörper 32, 33, 34 durch die aufgeschweißte Materialschicht 26' hindurchgeführt sind und bis in den unter dieser Materialschicht 26' liegenden Grundwerkstoff des Walzenkörpers 1' hineinreichen. In diesem Fall kann die Stärke der aufgeschweißten Materialschicht 26' deutlich kleiner gehalten werden als bei der Variante gemäß Fig. 3.While at the on hand of the Fig. 2 to 4 illustrated embodiments, the holes 22, 23, 24 are provided for receiving the new profile body 32, 33, 34 exclusively in the welded material layer 16 or 26 or 26 a, 26 b, 26 c shows Fig. 5 a variant of the embodiment according to Fig. 4 in which the bores 42, 43, 44 for receiving the new profiled bodies 32, 33, 34 are passed through the welded-on material layer 26 'and extend into the base material of the roller body 1' located below this material layer 26 '. In this case, the thickness of the welded-on material layer 26 'can be kept significantly smaller than in the variant according to FIG Fig. 3 ,

Bei der in Fig. 6 dargestellten Variante der Ausführung gemäß Fig. 2 wurde nur der am stärksten verschlissene innere Teilbereich der Breite des Walzenkörpers 1' abgedreht, in dem sich die Profilkörper 13', 14' befanden. Auf diesen abgedrehten Teilbereich wurde in einem Schweißvorgang eine Materialschicht 56 aufgebracht. Bohrungen 63, 64 in dieser Materialschicht 56 nehmen die neuen Profilkörper 53, 54 auf, deren Länge so gewählt ist, dass sich ihre Oberkanten etwa auf der Höhe der Oberkante der nicht entfernten Profilkörper 12' im nur wenig verschlissenen Randbereich der Breite des Walzenkörpers befinden.At the in Fig. 6 illustrated variant of the embodiment according to Fig. 2 was only the most worn inner portion of the width of the roller body 1 'turned off, in which the profile body 13', 14 'were. On this wrenched portion of a material layer 56 was applied in a welding process. Holes 63, 64 in this material layer 56 receive the new profile body 53, 54, whose length is chosen so that their upper edges are located approximately at the height of the upper edge of the not removed profile body 12 'in the slightly worn edge region of the width of the roll body.

Grundsätzlich gilt für das erfindungsgemäße Verfahren, dass der Walzenkörper nach der Wiederaufarbeitung nicht in jedem Fall einen über die ganze Länge des Walzenkörpers einheitlichen Durchmesser haben muss. Es können vielmehr für einzelne Teilbereiche unterschiedliche Durchmesser gewählt werden, etwa dann, wenn der Randbereich nur wenig verschlissen ist und deshalb hier keine Aufschweißung durchgeführt wird.In principle, with respect to the method according to the invention, after the reprocessing, the roll body does not always have to have a uniform diameter over the entire length of the roll body. It can be rather for individual sections are selected different diameters, such as when the edge area is only slightly worn and therefore no welding is performed here.

Claims (6)

  1. Method for reconditioning a used grinding roller of a material bed roller mill, containing a plurality of profile-members which are embedded, with a portion of the length thereof, in holes of the roller body and, with the remainder of the length thereof, project above the surface of the roller body, with that projecting portion of the profile-members and the surface of the roller body being at least partially worn,
    characterised by the following method steps:
    a) after the worn profile-members are removed, the worn surface of the roller body is turned at least in a part-region of the width of the roller body;
    b) subsequently, a material layer is applied at least to the turned surface in a welding operation in order to increase the diameter;
    c) subsequently, that welded material layer is provided with holes for receiving new profile-members.
  2. Method according to claim 1, characterised in that
    a) less heavily worn part-regions are turned as far as the diameter of the most heavily worn part-region and
    b) subsequently, a common material layer is applied to those differently worn part-regions in a welding operation in order to increase the diameter.
  3. Method according to claim 1, characterised in that
    a) differently worn part-regions are turned in different manners and
    b) subsequently, material layers of different thicknesses are applied to the surface of those part-regions in a welding operation in order to obtain a uniform outer diameter.
  4. Method according to claim 1, characterised in that
    a) only the most heavily worn part-region is turned and
    b) subsequently, a material layer is applied to that turned part-region in a welding operation.
  5. Method according to claim 1, characterised in that the material layer which is applied in a welding operation - when viewed over the width of the roller body - has different hardnesses, thicknesses and wear properties.
  6. Method according to claim 1, characterised in that the holes which are constructed in the welded material layer extend into the base material of the roller body located under that material layer.
EP07857825A 2007-03-13 2007-12-19 Method for reconditioning a used grinding roller Active EP2117716B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007012102A DE102007012102A1 (en) 2007-03-13 2007-03-13 Process for reprocessing a used grinding roller
PCT/EP2007/064203 WO2008110224A1 (en) 2007-03-13 2007-12-19 Method for reconditioning a used grinding roller

Publications (2)

Publication Number Publication Date
EP2117716A1 EP2117716A1 (en) 2009-11-18
EP2117716B1 true EP2117716B1 (en) 2010-09-22

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US (1) US8316543B2 (en)
EP (1) EP2117716B1 (en)
CN (1) CN101594938B (en)
AT (1) ATE482030T1 (en)
AU (1) AU2007349090B2 (en)
BR (1) BRPI0720763A8 (en)
CA (1) CA2675213C (en)
CL (1) CL2008000699A1 (en)
DE (2) DE102007012102A1 (en)
DK (1) DK2117716T3 (en)
MX (1) MX2009007504A (en)
PE (1) PE20081815A1 (en)
RU (1) RU2446888C2 (en)
WO (1) WO2008110224A1 (en)
ZA (1) ZA200905496B (en)

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Also Published As

Publication number Publication date
ATE482030T1 (en) 2010-10-15
CA2675213A1 (en) 2008-09-18
CA2675213C (en) 2014-02-18
WO2008110224A1 (en) 2008-09-18
US20100058570A1 (en) 2010-03-11
DK2117716T3 (en) 2011-01-10
BRPI0720763A2 (en) 2014-01-21
CN101594938B (en) 2012-02-01
US8316543B2 (en) 2012-11-27
RU2009131752A (en) 2011-04-20
RU2446888C2 (en) 2012-04-10
PE20081815A1 (en) 2009-02-19
CL2008000699A1 (en) 2008-09-22
ZA200905496B (en) 2010-04-28
AU2007349090A1 (en) 2008-09-18
EP2117716A1 (en) 2009-11-18
CN101594938A (en) 2009-12-02
MX2009007504A (en) 2009-07-17
DE502007005162D1 (en) 2010-11-04
DE102007012102A1 (en) 2008-09-18
BRPI0720763A8 (en) 2015-04-28
AU2007349090B2 (en) 2011-03-31

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