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WO2018146154A1 - Procédé de réparation d'un rouleau et d'une table utilisés dans un broyeur à rouleaux ainsi que rouleau et table ainsi réparés - Google Patents

Procédé de réparation d'un rouleau et d'une table utilisés dans un broyeur à rouleaux ainsi que rouleau et table ainsi réparés Download PDF

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Publication number
WO2018146154A1
WO2018146154A1 PCT/EP2018/053082 EP2018053082W WO2018146154A1 WO 2018146154 A1 WO2018146154 A1 WO 2018146154A1 EP 2018053082 W EP2018053082 W EP 2018053082W WO 2018146154 A1 WO2018146154 A1 WO 2018146154A1
Authority
WO
WIPO (PCT)
Prior art keywords
roller
grinding part
wear resistance
repaired
grinding
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.)
Ceased
Application number
PCT/EP2018/053082
Other languages
English (en)
Inventor
Martin TRENK
Thomas EDELHAUSER
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.)
MEC Holding GmbH
Original Assignee
MEC Holding 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
Application filed by MEC Holding GmbH filed Critical MEC Holding GmbH
Publication of WO2018146154A1 publication Critical patent/WO2018146154A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P6/00—Restoring or reconditioning objects
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P6/00—Restoring or reconditioning objects
    • B23P6/02—Pistons or cylinders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C15/00—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C15/00—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs
    • B02C15/004—Shape or construction of rollers or balls
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/0006—Working by laser beam, e.g. welding, cutting or boring taking account of the properties of the material involved
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/34—Laser welding for purposes other than joining
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/60—Preliminary treatment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K9/00—Arc welding or cutting
    • B23K9/04—Welding for other purposes than joining, e.g. built-up welding
    • B23K9/044—Built-up welding on three-dimensional surfaces
    • B23K9/046—Built-up welding on three-dimensional surfaces on surfaces of revolution
    • B23K9/048—Built-up welding on three-dimensional surfaces on surfaces of revolution on cylindrical surfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K9/00—Arc welding or cutting
    • B23K9/23—Arc welding or cutting taking account of the properties of the materials to be welded
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K9/00—Arc welding or cutting
    • B23K9/235—Preliminary treatment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P6/00—Restoring or reconditioning objects
    • B23P6/04—Repairing fractures or cracked metal parts or products, e.g. castings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2101/00—Articles made by soldering, welding or cutting
    • B23K2101/04—Tubular or hollow articles
    • B23K2101/06—Tubes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2101/00—Articles made by soldering, welding or cutting
    • B23K2101/20—Tools

Definitions

  • the present invention relates to a method of repairing a roller and/or a table used in a roller mill and to a roller and/or a table so repaired and relates particularly, but not exclusively, to a method of repairing a roller and/or a table used in a vertical roller mill as part of a cement production process mainly but in many other industries too.
  • roller mills and in particular vertical roller mills and Roller Presses for the creation of fine powders in processes such as cement production has been well known for many years.
  • An example of such a vertical roller mill is disclosed in US patent US6193176 with particular reference to figure 24.
  • the rollers (indicated at 5 in that figure) crush material against a table (indicated at 3) which rotates relative to the rollers. Over time the grinding parts (this is the rollers and the table) become worn with material being lost from their respective surfaces.
  • Repair of the rollers can be undertaken by the deposition of replacement material onto a worn section of the grinding parts (rollers and table) . This is typically undertaken by a process such as open arc welding where a source of material, in the form of a wire such as a chromium carbide wire, is deposited onto a roller to replace worn sections and bring back the original dimensions and roller profile. Skilled technicians use a template to determine the locations at which replacement material is required. They also ensure that the refurbished roller is provided with the required shape of outer surface and that the milling surface of the roller is rotationally symmetrical . Repairing a roller is significantly less expensive than replacing with a new roller.
  • the wear characteristics of a refurbished roller are not the same as an original roller as the grinding surface is now the weld overlay rather than the original cast material of the roller.
  • the material that is chosen as a casting for the roller is a compromise choice balancing the mechanical strength required for the roller body for the application and the wear resistance on the outer grinding surface. Typically, no cracks can be tolerated in such a casting, and this limits the hardness and wear resistance of the grinding surface. Consequently, there are a limited number of cast materials which are suitable for the production of the rollers. There is a significant cost associated with the amount of time that the roller is either not working (because it is being refurbished) or is working inefficiently (because the original optimal roller profile has been changed due to wear) .
  • the wear performance of the overlay is a critical cost issue for the operator.
  • Loss of profile means that regrinding is necessary and this has an extra cost and loss of grinding capacity for the plant.
  • a homogeneous cast material does not have a homogeneous wear loss of the grinding surface profile. Some areas on the grinding surface wear more than others, and the optimal profile is lost. Increasing the wear resistance of the surface material by refurbishment with more wear resistant material slows down the rate, but loss of optimal profile still occurs.
  • Preferred embodiments of the present invention seek to overcome or alleviate the above described disadvantages of the prior art.
  • a method of repairing a grinding part used in a roller mill comprising the steps :- measuring a grinding part to be repaired compared to predetermined dimensions to map material loss across at least a portion of at least one surface of said grinding part; and adding material to build said grinding part to said predetermined dimensions characterised by varying the wear resistance characteristics of the added material depending on the mapped material loss.
  • the even wear across the surface ensures that the roller works at its maximum efficiency for the longest possible time. This does not only increase the time between required refurbishments but also means that the vertical roller mill works at its optimum efficiency for as long as possible.
  • the wear resistance is varied by using materials of different wear resistance to the target material to be ground on at least the outermost portion of the repaired grinding part.
  • the materials of different wear resistance comprise substantially the same components in different proportions.
  • the materials of different wear resistance comprise different components Such as completely difference materials, chemistries, microstructures if required to achieve the target performance.
  • the wear resistance is varied by using different material application techniques on at least the outermost portion of the repaired grinding part. These techniques include, but are not limited to Open arc Welding, Plasma welding, Submerged arc welding, Gas shielded welding, brazing, laser cladding and the like.
  • material having the greatest wear resistance is located where the greatest material loss is mapped.
  • the method may further comprise removing further material from said grinding part after the step of measuring and before the step of adding material.
  • a repaired grinding part for use in a roller mill comprising: - a base portion comprising an unrepaired grinding part; added material coating at least a portion of said base portion creating a repaired grinding part to predetermined dimensions said added material having varied wear characteristics depending on material loss mapped across said unrepaired grinding part.
  • the added material coating comprises a plurality of materials with those having higher wear resistance characteristics being located at positions of greatest material loss as mapped.
  • Figure 1 is a schematic representation of a cross-section of a roller used in the present invention
  • Figure 2 is a flowchart showing the steps of a method of the present invention.
  • the process of the present invention is the refurbishment of grinding parts used in roller mills and therefore the creation of such refurbished parts.
  • grinding parts includes but is not limited to rollers and tables used in vertical roller mills and rollers used in roller presses. These rollers and tables, both refurbished and non-refurbished, are used in roller milling/grinding machines for the creation of fine powdered materials such as cement, clinker, raw meal, sinter, coal, coke, several other minerals and these milling/grinding machines include vertical roller mills, coal pulverizing mills, steel sinter grinding mills, raw meal and cement finishing mills.
  • the process of refurbishment of a roller mill roller has been described in detail and a similar process can be used on similar grinding components including, but not limited to, roller mill tables and roller press rollers.
  • roller mill roller An example of such a roller mill roller is schematically shown in figure 1 and indicated with reference numeral 10.
  • the roller 10 is frustoconical with the circular side surfaces 12 and 14 not directly involved in the milling process but with the curved milling surface, generally indicated at 16, engaging a plate surface of the mill.
  • the dotted line indicated at 18 represents the original outer surface of the curved milling surface 16 of the roller 10 and the solid line 20 represents the worn down after use version of this same curved milling surface 16.
  • the efficiency and effectiveness of the milling process is significantly decreased by uneven nature of that worn surface.
  • the roller and table are measured and repaired in place without removing the roller or table . Once the roller has been removed from the mill it is mapped
  • step S2 in order to identify variation in the wear, that is the material loss, on the milling surface.
  • a variety of techniques can be used to undertake this mapping process including laser linear or 3D scanning, mechanical measurement, optical measurement but in each case the map produced indicates the depth of material lost compared to the roller as originally formed. From this mapping portions of the milling surface 16 of roller 10 can be identified as having suffered similar material loss and these portions categorised and grouped together accordingly (at step S3) . In other words, the areas suffering the greatest material loss can be grouped together as can the areas suffering least material loss and further groups can be created relating to material losses therebetween. The number of groups to be identified depends on how many varieties of wear resistant coatings can be applied to the roller surface. The more different coatings that can be applied the more groups should be identified.
  • the worn roller Before the application of new material, the worn roller has the outermost surface treated to ensure good adhesion between the new material and the original roller material. This treatment can include removal of an outer layer of the surface material (at step S4) by mechanical means or gouging by using carbon electrodes, continuous wire, plasma or similar systems.
  • material can be applied to that surface to recreate the original profile, or a similar profile, of the roller 10.
  • the part may be machined down to a certain depth.
  • the refurbished profile 20 is recreated by adding material to build the roller to the predetermined dimensions of that profile whilst varying the wear resistance characteristics of the material being added depending upon the material loss as mapped in step S2 and identified in step S3.
  • portions of the profile which have suffered the greatest material loss are replaced with material having the greatest wear resistance characteristics, typically the greatest hardness.
  • the first example is to use a single material application process, such as open arc welding, and change the material used in the process.
  • Open arc welding uses a stock feed of wire and therefore the wear resistance characteristics are varied by changing the wire which is being fed into the open arc welding apparatus. It is envisaged that this happens in a single machine which has three or more wire feeds going into it or multiple machine heads having their own dedicated wire.
  • the application process allows for all the material of one wear resistance to be applied followed by the next material.
  • the material can be applied by a process of working around the roller varying the wire being used to apply material depending upon where the material is being applied.
  • a conventional cored wire can be used which is primarily composed of a tough, iron-based matrix with precipitated primary chrome carbide grains included which act as the hard and wear resistant material.
  • this wire can be substituted for a wire containing an additional amount of complex carbides and borides. These are typically based on niobium and vanadium carbides and borides which have a higher hardness than simple chrome carbide.
  • an even more wear resistant wire is used which contains, for example, harder wearing grains such as tungsten carbide, ceramics and metal/ceramics composites.
  • the second example is to remain with a single material application process and to have a series of wires formed from the same mixture of components but with varying quantities of the harder grain particles creating the variety in the wear resistance characteristics of the material applied.
  • the third example is to use one wire of a consistent chemistry, for example a wire containing tungsten carbide but changing the application method to give the different wear characteristics.
  • open arc welding is used for the least wear resistant areas.
  • the process of open arc welding generates significant amounts of heat in the wire to melt it and to create a good bond to the roller substrate.
  • these high temperatures have a negative effect on the tungsten carbide grains in the centre of the cored wire which causes them to dissolve into the metal matrix.
  • open arc welding with tungsten carbide still gives better wear resistant than complex carbide or simple chrome carbide alloys.
  • the more wear resistant coatings may be only applied to the outer layers of the roller to recreate the original profile. That is, lower cost materials can be used to fill significant volumes of the refurbished rollers and the more expensive wear resistant materials, which are generally more expensive, can be used on the outermost layer.
  • the example described above explains in detail how the present invention is applicable to the repair of rollers in a roller mill. However, the same principles can be applied to the repair of other similar components including but not limited to the table in a roller mill and the rollers in a roller press used for milling.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Optics & Photonics (AREA)
  • Food Science & Technology (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Crushing And Grinding (AREA)

Abstract

L'invention concerne un procédé de réparation d'une partie de broyage, telle qu'un rouleau (10), utilisée dans un broyeur à rouleaux. Le procédé consiste à mesurer un rouleau à réparer par comparaison avec des dimensions prédéfinies; à utiliser ces mesures pour cartographier une perte de matériau sur la surface du rouleau; puis à ajouter du matériau pour construire le rouleau aux dimensions prédéfinies et à modifier les caractéristiques de résistance à l'usure du matériau ajouté en fonction de la perte de matériau cartographiée.
PCT/EP2018/053082 2017-02-07 2018-02-07 Procédé de réparation d'un rouleau et d'une table utilisés dans un broyeur à rouleaux ainsi que rouleau et table ainsi réparés Ceased WO2018146154A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB1702019.9 2017-02-07
GB1702019.9A GB2559422A (en) 2017-02-07 2017-02-07 A method of repairing a grinding parts used in a roller mill and to grinding parts so repaired

Publications (1)

Publication Number Publication Date
WO2018146154A1 true WO2018146154A1 (fr) 2018-08-16

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PCT/EP2018/053082 Ceased WO2018146154A1 (fr) 2017-02-07 2018-02-07 Procédé de réparation d'un rouleau et d'une table utilisés dans un broyeur à rouleaux ainsi que rouleau et table ainsi réparés

Country Status (2)

Country Link
GB (1) GB2559422A (fr)
WO (1) WO2018146154A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109807543A (zh) * 2019-01-04 2019-05-28 湖北大地环保设备有限公司 一种带式输送机滚筒的修复方法
CN111360698A (zh) * 2020-04-03 2020-07-03 嘉兴沃尔德金刚石工具有限公司 一种高精密研磨棒的修复方法
US11060528B2 (en) 2016-10-26 2021-07-13 Man Truck & Bus Se Axial fan wheel

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102018111621B4 (de) * 2018-05-15 2020-01-23 Helmut Prihoda Verfahren zur Verbesserung der Produktivität von Mahlanlagen
CN111378897B (zh) * 2020-04-20 2021-01-05 燕山大学 一种助卷辊的辊面修复材料及一种助卷辊的激光熔覆再制造方法
DE102021103694B4 (de) 2021-02-17 2024-11-21 Kleemann Gmbh Verfahren zur Aufbereitung eines Verschleißteils einer Mineralverarbeitungsanlage

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU629243B2 (en) * 1989-09-14 1992-10-01 Kurimoto, Ltd. Method for manufacturing a crushing roller and method for using the roller
JPH057345U (ja) * 1991-07-04 1993-02-02 川崎重工業株式会社 竪型ミルの粉砕ローラ
JPH11309596A (ja) * 1998-04-23 1999-11-09 Kurimoto Ltd 竪型ロールミルの消耗部材の再生方法
US6193176B1 (en) 1997-02-18 2001-02-27 Kawasaki Jukogyo Kabushiki Kaisha Cement clinker grinding method using vertical roller mill and apparatus
KR100892320B1 (ko) * 2008-09-12 2009-04-08 주식회사 정원엔지니어링 내마모성이 우수한 다층 육성용접층 및 이를 이용한 미분기의 분쇄롤 및 회전판
US20160243556A1 (en) * 2013-10-02 2016-08-25 Thyssenkrupp Industrial Solutions Ag Method for operating an installation comprising at least one assembly with a rotating surface

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6625515B2 (en) * 2000-12-21 2003-09-23 Dofasco Inc. Roll defect management process
CN101249510A (zh) * 2008-03-27 2008-08-27 安徽工业大学 一种修复的轧辊及修复轧辊的方法
DE102010010431B4 (de) * 2010-03-05 2012-04-05 Thyssenkrupp Polysius Ag Verfahren zur Wiederaufarbeitung der verschlissenen Oberfläche von Mahlwalzen einer Gutbettwalzenmühle
CN102728993B (zh) * 2012-06-14 2014-06-11 燕山大学 一种连铸辊辊套的修复方法
CN105436709B (zh) * 2015-11-23 2018-01-12 莱芜钢铁集团有限公司 轧辊侧壁修复方法及轧辊

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU629243B2 (en) * 1989-09-14 1992-10-01 Kurimoto, Ltd. Method for manufacturing a crushing roller and method for using the roller
JPH057345U (ja) * 1991-07-04 1993-02-02 川崎重工業株式会社 竪型ミルの粉砕ローラ
US6193176B1 (en) 1997-02-18 2001-02-27 Kawasaki Jukogyo Kabushiki Kaisha Cement clinker grinding method using vertical roller mill and apparatus
JPH11309596A (ja) * 1998-04-23 1999-11-09 Kurimoto Ltd 竪型ロールミルの消耗部材の再生方法
KR100892320B1 (ko) * 2008-09-12 2009-04-08 주식회사 정원엔지니어링 내마모성이 우수한 다층 육성용접층 및 이를 이용한 미분기의 분쇄롤 및 회전판
US20160243556A1 (en) * 2013-10-02 2016-08-25 Thyssenkrupp Industrial Solutions Ag Method for operating an installation comprising at least one assembly with a rotating surface

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11060528B2 (en) 2016-10-26 2021-07-13 Man Truck & Bus Se Axial fan wheel
CN109807543A (zh) * 2019-01-04 2019-05-28 湖北大地环保设备有限公司 一种带式输送机滚筒的修复方法
CN109807543B (zh) * 2019-01-04 2019-12-10 湖北大地环保设备有限公司 一种带式输送机滚筒的修复方法
CN111360698A (zh) * 2020-04-03 2020-07-03 嘉兴沃尔德金刚石工具有限公司 一种高精密研磨棒的修复方法

Also Published As

Publication number Publication date
GB2559422A (en) 2018-08-08
GB201702019D0 (en) 2017-03-22

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