Classifications

• • 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
• • A—HUMAN NECESSITIES
  • A46—BRUSHWARE
  • A46B—BRUSHES
  • A46B13/00—Brushes with driven brush bodies or carriers
  • A46B13/001—Cylindrical or annular brush bodies
• • A—HUMAN NECESSITIES
  • A46—BRUSHWARE
  • A46B—BRUSHES
  • A46B2200/00—Brushes characterized by their functions, uses or applications
  • A46B2200/30—Brushes for cleaning or polishing
  • A46B2200/3093—Brush with abrasive properties, e.g. wire bristles

Definitions

• the invention relates to a method for shaping a roller cleaning brush, in particular for work rollers, for use in metal and in particular in aluminum hot strip mills with a brush covering comprising an end-mounted supporting base body with the brush covering attached to it, which is used to achieve a cleaning effect with a adjustable force or defined immersion depth is pressed against the roller, as well as a cleaning brush made according to the method.
• the most common type of brush is the steel brush.
• the coverings of this type of brush have a relatively high stiffness and can therefore only adapt very imperfectly to the contours of the rollers.
• the steel brush consists of a supporting body and a brush covering attached to it, the so-called. Stocking. This consists of brush hair made of corrugated steel wires. To achieve a cleaning effect, the brush is pressed against the roller with a certain force or with a defined immersion depth of the steel wires. The brush naturally bends. When using a cylindrical work roll and a cylindrical brush shape creates a contact pressure that is higher due to a deflection of the brush in the edge areas and lower in the middle.
• An essential goal for hot and cold rolling of strips is to create a profile with good strip flatness that fully meets the requirements for the rolled product.
• the strip profile is influenced by numerous factors, such as thermal crunch, roll wear and rolling forces. Therefore, there is a need to continuously adjust the crown of the work rolls.
• a roller with continuously changeable (continuously variable) crowning proves to be the most suitable adjusting mechanism.
• the work rolls are ground approximately S-shaped. Both work rolls have an identical grinding: The grinding of the top roll is offset by 180 ° compared to the bottom roll, so that they complement each other and result in a symmetrical roll gap contour.
• Document EP 0 605 833 B1 discloses a device for positioning a brush roller, in particular on the work roll of a roll stand for hot rolling aluminum, the brush roll being rotatable counter to the work roll rotation and translationally displaceable parallel to the work roll and being mounted on both sides in pivotable holders.
• the swivel bearing of each brush roll holder is arranged on the work roll chock.
• the holder has a swivel lever which is located between a controllable actuating element and a resettable support element, the actuating element being arranged in the balancing block or bending block for the work rolls and the support element on the work roll chock.
• Document EP 0 394 873 B1 describes a method for cold rolling aluminum strip in a rolling device which has at least a pair of work rolls and a pair of backup rolls, each backup roll being arranged to be in contact with a work roll.
• a cleaning brush is provided for each support roller, which is arranged in the open end of a channel device in order to touch and brush the support roller. The procedure is determined by the following steps:
• Document EP 0 640 412 A1 describes a device for cleaning
• Polishing a roller comprising a cleaning roller which is rotatably arranged on a support element with two parallel arms which extend between an inner end and an outer end and between a contact Position on the cleaning roller and a distance position are displaceable and have means for controlling the rotation.
• the outer ends of the two support arms are mounted parallel to the axis of the roller, or respectively on two aligned fixed bearings, the rotating roller being driven by a kinematic chain which can be pivoted on the axis of the transmission.
• JP 9057313 A relates to the problem of destroying the surface quality of a plate to be rolled and the problem of caking when aluminum plates are rolled.
• brush rolls be assigned to the work rolls in a cold rolling stand, in order to remove the adhering coating on the surfaces of the work rolls in contact with the work rolls.
• the document JP 10034210 A relates to the task of avoiding caking of slag particles on work rolls. To solve the problem, the arrangement of a brush roller for cleaning each work roller is proposed.
• the brush roller has a hollow body for the passage of cooling liquid with outlet bores in a radial arrangement from the hollow body.
• the present invention is based on the object of designing or grinding a cleaning brush in such a way that a uniform contact pressure between, for example, a work roll and the cleaning brush occurs over the length of the bale even if the work roll contoured any Bale shape.
• the shape of the cleaning brush or the brush covering is determined in accordance with the shape of the Roller is adjusted in such a way that the most uniform possible contact between the roller and cleaning brush pressure across the entire bale length and especially in the range of the roller.
• An embodiment of the method provides that the shape of the cleaning brush or the brush covering is adapted to the shape of the roller to such an extent that a minimum contact pressure can be set for a sufficient cleaning effect.
• the method is also expediently characterized in that the flexing of the brush base body, as well as the thermal crown of the roller, as is known in the art, are compensated for by a conformally symmetrical crowning of the brush covering, taking into account the influence of the rigidity of the brush body.
• the method according to the invention provides that in the event of an axial displacement of the work roll during operation by a function-related length dimension, the cleaning brush is also shifted in the same direction by a preferably the same length dimension in order to maintain its relative longitudinal position with respect to the roll and its roll shape. With fixed brushes, the contact pressure would have to be adjusted.
• a cleaning brush according to the invention for use in metal - and in particular in aluminum hot strip mills with a brush coating, in particular for carrying out the method according to the invention advantageously receives as a contour of their brush covering, which is adapted to the contour of the rollers, in particular the work roller.
• the cleaning brush according to the invention is designed in such a way that it is provided at least on one of its end bearings with means for displacement in the direction of its axis or is coupled to the displaceable work rolls.
• Figure 1 is a front view of two cylindrical work rolls in cooperation with cylindrical cleaning brushes.
• FIG. 2a in the diagram the contact pressure of the cleaning brush according to FIG. 2;
• FIG. 3a shows the area of higher brush wear according to FIG. 3;
• Fig. 4 work roll and cleaning brush in the case of mutual formation of S-shaped contoured work roll and cleaning brush. 4a diagram of an embodiment of the working pressure according to FIG. 4
• Fig. 1 shows a pair of work rolls 4, 4 'when rolling a rolled strip 8 in the nip.
• the surface areas of the work rolls 4, 4 'emerging from the roll gap 8 are gripped by the cleaning brushes 1, 1a rotating in opposite directions and cleaned of impurities such as emulsion residues, baked-on rolling stock and oxide particles.
• the illustration shows the front sides of the work rolls 4, 4 'and the cleaning brushes 1, 1a. Work rolls and cleaning rolls are cylindrical.
• the cleaning brush shows a side view of the work roll 4 in cooperation with the cylindrical cleaning brush 1.
• the cleaning brush is pressed onto the work roll 4 on both sides with pressing forces F ß / 2 and thereby forms a deflection D.
• the cleaning brush comprises a base body 3, preferably made of steel, with a brush covering 2. This consists of corrugated steel wires.
• FIG. 3a shows, in the case of a combination of an S-shaped work roll 4 with a cylindrical cleaning brush 1 according to FIG. 3, the area 6 of increased contact pressure and the subsequent area 7 of lower contact pressure and correspondingly less cleaning effect. Such a combination is obviously inappropriate.
• the diagram 4a shows a uniform contact pressure over the length of the cleaning brush 1.
• Such an optimal contact pressure is achieved with the inventive design of an S-shaped contoured work roll 4 in cooperation with an S-shaped contoured cleaning brush 1.
• the shape of the brush cut 5, 5 'of the shape of the work roll 4 is largely adapted so that a minimum contact force FB can be selected for a sufficient cleaning effect.
• the shape of the brush covering 2 can be designed with a parabolic cut, with a cut of any polynomial, an exponential function, an angular function and the like, depending on the geometry of the work roll 4.
• the deflection D of the brush base body 3 according to experience and the thermal crown of the work roll 4 according to experience are compensated for by a conformally symmetrical crowning of the brush covering 2, taking into account the influence of the rigidity of the brush base body 3.
• the cleaning brush is also shifted in the same direction by a preferably the same length measure to maintain its relative longitudinal position relative to the work roll and its roll shape, and / or the contact pressure of the brush is changed.
• the cleaning brush for use in metal and in particular in aluminum hot strip mills is provided with a brush covering 2 made of corrugated steel wires.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Cleaning In General (AREA)
• Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
• Brushes (AREA)
• Polishing Bodies And Polishing Tools (AREA)
• Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
• Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
• Bending Of Plates, Rods, And Pipes (AREA)

Applications Claiming Priority (2)

Publications (2)

Family

ID=34071824

Family Applications (1)

Country Status (15)

Families Citing this family (14)

Family Cites Families (9)

• 2003
  • 2003-07-22 DE DE10333215A patent/DE10333215A1/de not_active Withdrawn
• 2004
  • 2004-06-23 ES ES04740185T patent/ES2356913T3/es not_active Expired - Lifetime
  • 2004-06-23 UA UAA200601889A patent/UA85558C2/ru unknown
  • 2004-06-23 KR KR1020067001545A patent/KR101121498B1/ko not_active Expired - Fee Related
  • 2004-06-23 WO PCT/EP2004/006760 patent/WO2005018844A1/fr not_active Ceased
  • 2004-06-23 RU RU2006105390/02A patent/RU2353448C2/ru active
  • 2004-06-23 AT AT04740185T patent/ATE493211T1/de active
  • 2004-06-23 BR BRPI0412796A patent/BRPI0412796B8/pt not_active IP Right Cessation
  • 2004-06-23 JP JP2006520691A patent/JP4745967B2/ja not_active Expired - Fee Related
  • 2004-06-23 CA CA2532665A patent/CA2532665C/fr not_active Expired - Fee Related
  • 2004-06-23 CN CNB2004800211863A patent/CN100537069C/zh not_active Expired - Fee Related
  • 2004-06-23 DE DE502004012065T patent/DE502004012065D1/de not_active Expired - Lifetime
  • 2004-06-23 US US10/565,225 patent/US7788762B2/en not_active Expired - Fee Related
  • 2004-06-23 EP EP04740185A patent/EP1646456B1/fr not_active Expired - Lifetime
  • 2004-07-08 TW TW093120442A patent/TWI348940B/zh not_active IP Right Cessation
• 2005
  • 2005-12-22 ZA ZA200510393A patent/ZA200510393B/xx unknown

Non-Patent Citations (1)

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