EP2385879B1 - Verfahren zur wiederaufarbeitung der verschlissenen oberfläche von mahlwalzen einer gutbettwalzenmühle - Google Patents

Verfahren zur wiederaufarbeitung der verschlissenen oberfläche von mahlwalzen einer gutbettwalzenmühle Download PDF

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Publication number
EP2385879B1
EP2385879B1 EP11709047.2A EP11709047A EP2385879B1 EP 2385879 B1 EP2385879 B1 EP 2385879B1 EP 11709047 A EP11709047 A EP 11709047A EP 2385879 B1 EP2385879 B1 EP 2385879B1
Authority
EP
European Patent Office
Prior art keywords
roller
new
grinding
cylindrical surface
welding
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.)
Not-in-force
Application number
EP11709047.2A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2385879A1 (de
Inventor
Bernd KRIPZAK
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
ThyssenKrupp Resource Technologies 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=44065526&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP2385879(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by ThyssenKrupp Resource Technologies GmbH filed Critical ThyssenKrupp Resource Technologies GmbH
Publication of EP2385879A1 publication Critical patent/EP2385879A1/de
Application granted granted Critical
Publication of EP2385879B1 publication Critical patent/EP2385879B1/de
Not-in-force legal-status Critical Current
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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
    • Y10T29/49718—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
    • 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
    • Y10T29/49728—Removing material and by a metallurgical operation, e.g., welding, diffusion bonding, casting

Definitions

  • the invention relates to a process for reprocessing the worn surface of grinding rolls of a high-bed roll mill.
  • a good bed roller mill consists of two roller units each comprising a grinding roller mounted on a shaft, bearings provided on both sides of the grinding roller and associated bearing blocks. Two of these roller units are aligned so that a predetermined nip is formed between two opposing rollers. Both rolls are driven in opposite directions and pressed against each other at high pressures of at least 50 MPa.
  • Conventional roll units have a roll diameter in the range of 1.5 to 3 m and have a weight of up to 120 tons.
  • grinding rollers must be reprocessed after a certain period of operation in a service center or in a workshop. Such reprocessing processes are for example in the DE 10 2006 028 546 A1 , in the DE 10 2007 018 090 A1 and the DE 10 2007 012 102 A1 described in more detail.
  • the cost of reprocessing is approximately in the range of 60 to 80% of the original price.
  • Another shortcoming is the sometimes long downtime.
  • DE 26 12 173 B DE 10 2005 004 036 B4 and DE 26 12 173 B are known "on-site" repairs, with the necessary tools are brought to the workpiece.
  • the invention is therefore based on the object to reduce the cost of reprocessing the worn surface of grinding rollers of a high-pressure roller mill.
  • a mobile, arranged in a container processing station can be accommodated for example on the trailer of a truck. After the life of each good bed roller mill are relatively accurately predictable, standing on different sites good bed roller mills can be approached by a predetermined schedule with the mobile processing station.
  • the complete roller unit with the refining roller to be reprocessed is removed from the good bed roller mill and positioned directly in front of the mobile processing station.
  • the grinding roller is thus stored during their work-up in their own camps. After the grinding roller does not have to be accommodated in the container, the container can be sized correspondingly smaller.
  • the processing of the grinding rollers on site also allows a reduction in the downtime of the high-pressure roller mill to a minimum.
  • the grinding rollers are provided with build-up welding as wear protection, the new cylindrical surface is re-coated during work-up by build-up welding. For this purpose, in particular a plurality of welding layers are applied.
  • the mobile processing station has a welding device, so that a material layer for increasing the diameter and / or armoring can be welded onto the new cylindrical surface prior to drilling. Furthermore, the processing station comprises a drive which rotates the grinding roller in the manufacture of the new cylindrical surface.
  • the production of the new cylindrical surface can be done by milling or another machining process.
  • milling a milling head is advantageously used, which is used radially aligned with the grinding roller used.
  • the mobile processing station for carrying out the above method comprises at least one cutting machine tool and a drive for rotating the grinding roller, which are arranged in the container.
  • the cutting machine tool can be formed for example by a boring machine, a grinding machine, a lathe or a robot.
  • a device for supplying coolants and / or lubricants and optionally means for collecting and returning excess coolants and / or lubricants may be provided in the container.
  • Fig. 1 shown good bed roller mill consists of two roller units A and B.
  • Fig. 2 one of the roller units is shown in somewhat more detail in a longitudinal section. It has in each case one mounted on a shaft 1 grinding roller 2, provided on both sides of the grinding roller bearings 3, 4 and associated bearing stones 5, 6.
  • the two rolls are driven in opposite directions and pressed in operation with a pressure of more than 50 MPa against each other, whereby a predetermined gap is maintained, in which the material to be ground is fed.
  • Fig. 3 shows (in a schematic longitudinal partial section through the grinding roller 2) on the left the new condition of the grinding roller 2, which has a roller body 2a, which is provided with a plurality of holes 2b, are embedded in the profile body 2c with a portion of their length while they protrude with the remaining part of its length over the surface 2d of the roller body 2a.
  • grinding roller 2 is provided in the new state on the left side with several surfacing layers 2e as wear protection. On the right side of Fig. 4 the worn condition of the surfacing layers 2e 'is indicated.
  • the mobile processing station C has in particular a container 8, in which at least one cutting machine tool 9 is provided, which is preferably a robot with a pivotable and rotatable about several axes pivot arm 9a and a machining tool 9b.
  • a drive 10 for rotating the grinding roller 2 is provided in the container.
  • a sprocket 11 is screwed to one end of the shaft 1 of the roller unit A, which is connected via a drive chain 12 to the drive 10. With this drive, a rotary motion can be transmitted to the shaft 1.
  • a measuring device is provided on the drive 10, which allows accurate positioning of the rotational position of the grinding roller 2.
  • an operating stand 13 for controlling the machine tool 9 and the drive 10 a magazine 14 for new profile body and storage locations for various processing tools 9c, 9d, for example, a drill head and a welding device available.
  • a device 15 for the supply of coolants and / or lubricants is still provided in the container C. Furthermore, means 16 for collecting and returning excess coolants and / or lubricants are indicated by dashed lines.
  • the container C is further designed so that the roller unit opposite longitudinal side can be opened upwards (see Fig. 6 ). That's it Of course, it is also conceivable that a part or the entire ceiling of the container can be opened.
  • the reworking unit A is positioned immediately before the processing station C, so that the grinding roller is within reach of the machine tool 9.
  • the special feature is that the complete roller unit is aligned in front of the mobile processing station so that the grinding roller can rotate in its own bearings. After an alignment of the grinding roller with respect to the machine tool 9, the reprocessing can begin, based on the FIGS. 7a to 7f is explained in more detail.
  • Fig. 7a shows a worn grinding roller
  • the wear protection was formed with profiled bodies 2c.
  • the old profile bodies 2c are removed ( Fig. 7b ).
  • a new cylindrical surface 2h is produced by means of the machine tool 9.
  • a milling head is used as the machining tool 9b, which is used radially aligned with the grinding roller.
  • the surface of the grinding roller is removed until all the holes 2b have completely disappeared ( Fig. 7c ).
  • the mobile processing station C has a welding device or the machine tool 9 has a welding head 9d, it is possible to weld on the new cylindrical surface material layers 2i for increasing the diameter ( Fig. 7d ).
  • new bores 2f can be drilled into the new cylindrical surface 2h or into the material layers 2i. It is important that a given hole pattern is maintained depending on the diameter of the grinding roller. The correct positioning takes place via a corresponding control of the machine tool 9 and the drive 10.
  • the downtime of the good bed roller mill can be reduced to a minimum, since long transport times to and from Service Centers omitted.
  • the mobile processing station can be housed in a container having a weight of about 10 to 12 tons.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)
EP11709047.2A 2010-03-05 2011-03-03 Verfahren zur wiederaufarbeitung der verschlissenen oberfläche von mahlwalzen einer gutbettwalzenmühle Not-in-force EP2385879B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010010431A DE102010010431B4 (de) 2010-03-05 2010-03-05 Verfahren zur Wiederaufarbeitung der verschlissenen Oberfläche von Mahlwalzen einer Gutbettwalzenmühle
PCT/EP2011/053169 WO2011107538A1 (de) 2010-03-05 2011-03-03 Verfahren zur wiederaufarbeitung der verschlissenen oberfläche von mahlwalzen einer gutbettwalzenmühle

Publications (2)

Publication Number Publication Date
EP2385879A1 EP2385879A1 (de) 2011-11-16
EP2385879B1 true EP2385879B1 (de) 2013-10-30

Family

ID=44065526

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11709047.2A Not-in-force EP2385879B1 (de) 2010-03-05 2011-03-03 Verfahren zur wiederaufarbeitung der verschlissenen oberfläche von mahlwalzen einer gutbettwalzenmühle

Country Status (7)

Country Link
US (1) US8728569B2 (es)
EP (1) EP2385879B1 (es)
CA (1) CA2791405C (es)
DE (1) DE102010010431B4 (es)
DK (1) DK2385879T3 (es)
MX (1) MX2012010234A (es)
WO (1) WO2011107538A1 (es)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013114516B4 (de) * 2013-12-19 2023-11-02 Flsmidth A/S Mahlwalze sowie Vorrichtung zur Bearbeitung einer Mahlwalze
GB2559422A (en) * 2017-02-07 2018-08-08 Mec Holding Gmbh A method of repairing a grinding parts used in a roller mill and to grinding parts so repaired
CN112371245A (zh) * 2020-10-31 2021-02-19 中材天山(云浮)水泥有限公司 一种防止立磨辊皮开裂的方法
CN115194403B (zh) * 2022-08-03 2024-04-19 中车戚墅堰机车有限公司 一种大型电机座的修复方法

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT344771B (de) * 1975-12-01 1978-08-10 Plasser Bahnbaumasch Franz Fahrbare schienenschleifmaschine
DD283706A7 (de) * 1988-12-19 1990-10-24 Veb Schwermaschinenbau "Karl Liebknecht" Magdeburg,Dd Vorrichtung zur reparatur von zylinderbloecken
US4996757A (en) * 1990-01-16 1991-03-05 Parham Robert L Method of repairing a one-piece roller assembly
DE4402958C2 (de) * 1994-02-01 1996-02-15 Smr De Haan Gmbh Verfahren zur Instandsetzung der Befestigungsflächen von Verschleißplatten am Ständer eines Walzgerüstes
DE19805137A1 (de) * 1998-02-09 1999-08-12 Krupp Polysius Ag Walzenmühle
AU2003903620A0 (en) * 2003-07-11 2003-07-31 Technological Resources Pty Ltd Repairing crusher rolls
DE102005004036B4 (de) * 2005-01-27 2006-11-16 E.On Wasserkraft Gmbh Vorrichtung und Verfahren zur mechanischen Bearbeitung einer rotationssymetrischen Dichtfläche einer Kaplan-Turbine
DE102006028546A1 (de) 2006-06-21 2007-12-27 Polysius Ag Verfahren zur Wiederaufarbeitung einer gebrauchten Mahlwalze
DE102007012102A1 (de) * 2007-03-13 2008-09-18 Polysius Ag Verfahren zur Wiederaufarbeitung einer gebrauchten Mahlwalze
DE102007018090A1 (de) 2007-04-17 2008-10-23 Polysius Ag Mahlwalze sowie Verfahren zur Wiederaufarbeitung

Also Published As

Publication number Publication date
EP2385879A1 (de) 2011-11-16
DE102010010431A1 (de) 2011-09-08
WO2011107538A1 (de) 2011-09-09
DE102010010431B4 (de) 2012-04-05
CA2791405A1 (en) 2011-09-09
DK2385879T3 (da) 2014-01-20
CA2791405C (en) 2017-12-05
US20120315385A1 (en) 2012-12-13
US8728569B2 (en) 2014-05-20
MX2012010234A (es) 2012-10-09

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