EP0397993A2 - Verfahren zum Schleifen von Walzen - Google Patents

Verfahren zum Schleifen von Walzen Download PDF

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Publication number
EP0397993A2
EP0397993A2 EP90105460A EP90105460A EP0397993A2 EP 0397993 A2 EP0397993 A2 EP 0397993A2 EP 90105460 A EP90105460 A EP 90105460A EP 90105460 A EP90105460 A EP 90105460A EP 0397993 A2 EP0397993 A2 EP 0397993A2
Authority
EP
European Patent Office
Prior art keywords
roll
grinder
grind
stone
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.)
Withdrawn
Application number
EP90105460A
Other languages
English (en)
French (fr)
Other versions
EP0397993A3 (de
Inventor
Tomio Hiroshima Mach. Works Mitsubishi Azumi
Osamu Hiroshima Mach. Works Mitsubishi Kishi
Kanji Hiroshima Mach. Works Mitsubishi Hayashi
Shozo Hiroshima Mach. Works Mitsubishi Yokota
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.)
Mitsubishi Heavy Industries Ltd
Original Assignee
Mitsubishi Heavy Industries Ltd
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 Mitsubishi Heavy Industries Ltd filed Critical Mitsubishi Heavy Industries Ltd
Publication of EP0397993A2 publication Critical patent/EP0397993A2/de
Publication of EP0397993A3 publication Critical patent/EP0397993A3/de
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
    • B24B5/02—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centres or chucks for holding work
    • B24B5/16—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centres or chucks for holding work for grinding peculiarly surfaces, e.g. bulged
    • B24B5/167—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centres or chucks for holding work for grinding peculiarly surfaces, e.g. bulged for rolls with large curvature radius, e.g. mill rolls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B28/00—Maintaining rolls or rolling equipment in effective condition
    • B21B28/02—Maintaining rolls in effective condition, e.g. reconditioning
    • B21B28/04—Maintaining rolls in effective condition, e.g. reconditioning while in use, e.g. polishing or grinding while the rolls are in their stands

Definitions

  • the present invention relates to a method for grinding a rotating roll, and more particularly to a method for remediably grinding a roll on an on-line basis in the event that the roll wears during a rolling work as is the case with a work roll in a rolling mill.
  • the subject method is also applicable to on-line grinding of a pinch roll equipped in front of a downcoiler as well as grinding of work rolls and backup rolls in various kinds of rolling mills.
  • Fig. 8 shows one example of such on-line roll grinding system, in which a surface of a work roll 1 is ground into a desired profile by pressing an unrotating grinder 3 such as a grind stone against the surface of the work roll 1 while the work roll 1 is being rotated and also moving the grinder 3 in the axial direction of the roll, that is, in the direction perpendicular to the plane of the sheet of the figure.
  • Fig. 9 shows another example, which is a method for grinding by pressing a revolving grinding belt 3′ against a rotating work roll 1 similarly to the preceding example and moving it in the axial direction of the roll.
  • Fig. 10 discloses another method, in which grinding of a roll 1 is made possible even if a forcive driving device for a grinder 3 is not present, by making a rotary axis O G of the grinder 3 offset by H with respect to a rotary axis O R of the roll 1.
  • a method proposed for resolving the above-­mentioned problems is the non-drive type on-line grinding apparatus shown in Fig. 10.
  • This method was character strictlyistic in that since the grinder can achieve grinding while rotating in association with the roll even without a forcive driving device for the grinder, a stable grinding performance can be obtained.
  • buzzing vibra­tion was generated in the grinder, and the problem that a grinding performance became unstable and also an outer circumferential surface of the grinder was broken and damaged, arose.
  • a specific object of the present invention is to provide a method for grinding a rotating roll, in which clogging on a grinder does not occur and hence degradation of a grinding performance in use would not arise.
  • Another specific object of the present invention is to provide a method for grinding a rotating roll, in which breaking damage of a circumferential portion of a grinder would not occur.
  • Still another specific object of the present invention is to provide a method for grinding a rotating roll, in which neither buzzing vibration nor seizure of a grinder would occur.
  • Yet another specific object of the present invention is to provide a method for grinding a rotating roll, which does not necessitate to complicate a structure of a grinding apparatus nor to increase an installation expense of the apparatus.
  • a method for grinding a roll wherein the roll can be ground without forcibly driving grinders by arraying along the axial direction of the roll a plurality of grinder holders adapted to press grinders mounted to their tip end portions against the roll surface within a frame which can reciprocate along the roll axis, mounting the grinders within the holders with their rotary axes inclined in the axial direction of the roll with respect to normal lines of the roll surface, and also displacing the rotary axes of the grinders by a given offset amount H with respect to the rotary axis of the roll, which method is improved in that the relations between the offset amount H and dimensions D G and d G of the grinders are preset in the range defined by the following formulae: 0.1 ⁇ H/D G ⁇ 0.4 0.1 ⁇ d G /D G where H represents an offset amount between a grinder rotary axis and a roll rotary axis, d G represents an inner diameter of the grinder and D G
  • the direction of a relative slip velocity V S occur­ring at the contact portion between the grinder and the roll to be ground would become proper, so that vibration and breaking damage of the grinder can be prevented.
  • the direction of a relative slip velocity would not coincide with a contact line, and so, seizure and clogging of the grinder can be precluded.
  • Fig. 1 is a plan view showing one example of a roll grinding apparatus embodying the grinding method according to the present invention as applied, by way of example, to a work roll in a four-­stage rolling mill
  • Fig. 2 is a cross-section view taken along line A-A in Fig. 1.
  • the rolling mill operates to roll a sheet material 15 to be rolled by means of a work roll 1, and the work roll 1 is reinforced by a back-up roll 2.
  • Grinders 3 such as ring-shaped grind-­stone arrayed in multiple along the axial direction of the work roll 1 are rotatably supported individually at tip end portions of grinder holders 6 respectively via shafts 4 and bearings 5.
  • the grinder 3 will be described as “grind-stone 3”
  • the grinder holder 6 will be described as "grind-stone holder 6".
  • Each grind-stone holder 6 forms a plunger, its rear portion is connected to a pressing device 8 consisting of a plunger 8a and a cylinder 8b, and it is fitted and mounted in a casing 9 so as to be able to advance and retreat in the direction of arrows X.
  • Each pressing device 8 is mounted to the inside of a rear cover 9a of the casing 9, and it can press the grind-stone 3 against the surface of the work roll 1 by feeding working fluid into the cylinder 8b through a hole 10 via a hydraulic control valve not shown.
  • the respective grind-stones 3 are mounted within the casing 9 with their rotary axes O G inclined in the axial direction of the roll by an arbitrary set angle ⁇ with respect to normal lines N of the outer circumferential surface of the work roll 1 as shown in Fig. 1, and by moving the casing 9 vertically by means of an elevator device 13 it is possible to make the rotary axes O G of the grind-stones 3 offset to the upper or lower side with respect to the work roll axis O R .
  • the illustrated example is the case where the rotary axes O G are made to offset by a set value H to the upper side.
  • Fig. 3 is a partial side view showing a contact state between a grinder and a roll, and if the grind-stone rotary axis O G is made to offset with respect to the work roll axis O R , during grinding, a contact portion between a tip end surface of the grind-stone 3 and the work roll 1, that is, a grinding surface becomes line contact l as shown in Fig. 4.
  • Fig. 5 shows data obtained by analyzing grinding performances when a roll was ground while the offset amount H (normalized by taking a proportion H/D G relative to the grind-stone outer diameter) and the inner diameter of the grind-stone d G (normalized by taking a proportion d G /D G relative to the grind-stone diameter).
  • the ordinate of the diagram in Fig. 5 indicates a grinding ratio G which is defined by the following formula:
  • slip velocities V S at any arbitrary points on the contact line l between the grind-­stone and the roll are displayed in terms of vectors, and it is seen that the direction of the slip velocity V S is greatly varied depending upon the grind-stone offset. amount H and the grind-stone inner diameter d G .
  • Fig. 5 is shown the relation between the buzzing vibra­tion and the grinding conditions. That is, if the offset amount H/D G becomes 0.1 or less, buzzing vibration becomes liable to occur, and if the offset amount H/D G is further reduced, breaking damage of the grind-stone would be induced.
  • the slip velocity V S is directed down­wards both in the inside portion and in the outside por­tion.
  • the offset amount is small, buzzing vibration would occur, because the direction of the slip velocity V S would become reversed in the inside portion and the outside portion of the grind-stone, the direction of the external forces (grinding resistant forces) acting upon the rotary axis of the grind-stone would distribute over a broad range, and its deformation mode becomes complicated.
  • the grind-stone becomes liable to be broken and damaged. More particularly. at any arbitrary point on the contact line l of the roll, grinding resistant forces in the direction of the slip velocites would act upon the grind-­stone. In the inside portion of the contact line l , they are resistant forces directed downwards, and so, they are not relevant to breaking damage of the grind-stone. Whereas, in the outer circumferential portion, a mechanical strength of the grind-stone is weak, and the grind-stone would be broken and damaged relatively easily even by small external forces. In this case, as the directions of the resistant forces exerted by the roll that is, the direc­tion of the slip velocities are directed closer to the radially outward direction, breaking damage is liable to occur.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Grinding Of Cylindrical And Plane Surfaces (AREA)
EP19900105460 1989-05-19 1990-03-22 Verfahren zum Schleifen von Walzen Withdrawn EP0397993A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP126017/89 1989-05-19
JP1126017A JPH0675730B2 (ja) 1989-05-19 1989-05-19 ロールの研削方法

Publications (2)

Publication Number Publication Date
EP0397993A2 true EP0397993A2 (de) 1990-11-22
EP0397993A3 EP0397993A3 (de) 1993-01-13

Family

ID=14924663

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19900105460 Withdrawn EP0397993A3 (de) 1989-05-19 1990-03-22 Verfahren zum Schleifen von Walzen

Country Status (5)

Country Link
EP (1) EP0397993A3 (de)
JP (1) JPH0675730B2 (de)
CN (1) CN1018345B (de)
AU (1) AU609005B2 (de)
BR (1) BR9001481A (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4409060A1 (de) * 1994-03-11 1995-09-21 Mannesmann Ag Vorrichtung zum Nachschleifen eingebauter Walzen
DE4422148A1 (de) * 1994-06-27 1996-01-04 Naxos Union Schleifmittel Verfahren und Vorrichtung zum Schleifen von Arbeitswalzen eines Walzgerüsts
EP0765697A1 (de) * 1995-09-29 1997-04-02 MANNESMANN Aktiengesellschaft Vorrichtung zum Nachschleifen der in Warmbandwalzgerüsten eingebauten Walzen
WO1997039844A1 (en) * 1996-04-25 1997-10-30 Berg Gisela E Method and system for the maintenance of surfaces
US5954565A (en) * 1992-06-03 1999-09-21 Hitachi Ltd. Rolling mill equipped with on-line roll grinding system and grinding wheel
CN117697545A (zh) * 2024-01-18 2024-03-15 石家庄石特轧辊有限公司 一种轧辊加工成型设备

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3022702B2 (ja) * 1993-05-27 2000-03-21 株式会社日立製作所 オンライン圧延ロール研削装置
JP5334568B2 (ja) * 2008-12-26 2013-11-06 ノードソン コーポレーション ロール研磨方法
CN101745849B (zh) * 2010-01-05 2012-01-18 山西太钢不锈钢股份有限公司 磨床辊环修磨架位装配方法
CN103111920B (zh) * 2011-11-16 2015-03-18 上海梅山钢铁股份有限公司 利用非数控磨床磨削近似变接触支撑辊辊型曲线的方法
CN102554722B (zh) * 2011-12-27 2014-04-16 深圳市乐普泰科技股份有限公司 具有弹性层的胶辊加工控制方法及装置
CN102615560A (zh) * 2012-04-20 2012-08-01 厦门理工学院 可实现逆宽轧制的在线磨辊方法
CN107234132B (zh) * 2016-03-28 2019-09-20 宝山钢铁股份有限公司 高耐蚀性二次冷轧镀铬钢板的生产方法
CN106078506A (zh) * 2016-07-25 2016-11-09 唐山钢铁集团有限责任公司 一种轧辊磨床的轧辊旋转驱动装置
CN106141827B (zh) * 2016-08-30 2018-05-08 中冶南方工程技术有限公司 轧辊自动磨削***
CN106553089B (zh) * 2016-11-24 2018-08-31 南京钢铁股份有限公司 一种使用普通外圆磨床加工带有弧形凹度轧辊的加工方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61249609A (ja) * 1985-04-27 1986-11-06 Mitsubishi Heavy Ind Ltd 回転体研削方法
US4716687A (en) * 1985-02-22 1988-01-05 Mitsubishi Jukogyo Kabushiki Kaisha Method and apparatus for grinding a rotary body
EP0344610A2 (de) * 1988-05-28 1989-12-06 Noritake Co., Limited Schleifscheibe mit hoher Schlagfestigkeit zum in-situ-Schleifen von Rollen

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60184411A (ja) * 1984-03-05 1985-09-19 Nippon Steel Corp 圧延設備におけるロ−ル研削装置
JPS61235014A (ja) * 1985-04-12 1986-10-20 Mitsubishi Heavy Ind Ltd 圧延ロ−ル研削装置
JP2580173B2 (ja) * 1987-06-10 1997-02-12 三菱重工業株式会社 圧延ロ−ルのオンライン研削方法

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4716687A (en) * 1985-02-22 1988-01-05 Mitsubishi Jukogyo Kabushiki Kaisha Method and apparatus for grinding a rotary body
JPS61249609A (ja) * 1985-04-27 1986-11-06 Mitsubishi Heavy Ind Ltd 回転体研削方法
EP0344610A2 (de) * 1988-05-28 1989-12-06 Noritake Co., Limited Schleifscheibe mit hoher Schlagfestigkeit zum in-situ-Schleifen von Rollen

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 11, no. 102 (M-576)(2549) 31 March 1987 & JP-A-61 249 609 ( MITSUBISHI HEAVY IND LTD ) 6 November 1986 *

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5954565A (en) * 1992-06-03 1999-09-21 Hitachi Ltd. Rolling mill equipped with on-line roll grinding system and grinding wheel
US6283823B1 (en) 1992-06-03 2001-09-04 Hitachi, Ltd. Rolling mill equipped with on-line roll grinding system and grinding wheel
US6306007B1 (en) 1992-06-03 2001-10-23 Hitachi, Ltd. Rolling mill equipped with on-line roll grinding system and grinding wheel
US6585558B1 (en) 1992-06-03 2003-07-01 Hitachi, Ltd. Rolling mill equipped with on-line roll grinding system and grinding wheel
DE4409060A1 (de) * 1994-03-11 1995-09-21 Mannesmann Ag Vorrichtung zum Nachschleifen eingebauter Walzen
DE4409060C3 (de) * 1994-03-11 2000-08-03 Mannesmann Ag Vorrichtung zum Nachschleifen eingebauter Walzen
DE4422148A1 (de) * 1994-06-27 1996-01-04 Naxos Union Schleifmittel Verfahren und Vorrichtung zum Schleifen von Arbeitswalzen eines Walzgerüsts
EP0765697A1 (de) * 1995-09-29 1997-04-02 MANNESMANN Aktiengesellschaft Vorrichtung zum Nachschleifen der in Warmbandwalzgerüsten eingebauten Walzen
WO1997039844A1 (en) * 1996-04-25 1997-10-30 Berg Gisela E Method and system for the maintenance of surfaces
CN117697545A (zh) * 2024-01-18 2024-03-15 石家庄石特轧辊有限公司 一种轧辊加工成型设备
CN117697545B (zh) * 2024-01-18 2024-05-24 石家庄石特轧辊有限公司 一种轧辊加工成型设备

Also Published As

Publication number Publication date
CN1018345B (zh) 1992-09-23
AU5230490A (en) 1990-11-22
AU609005B2 (en) 1991-04-18
CN1047241A (zh) 1990-11-28
BR9001481A (pt) 1991-04-16
JPH0675730B2 (ja) 1994-09-28
JPH02303612A (ja) 1990-12-17
EP0397993A3 (de) 1993-01-13

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