US3610013A - Crown control for rolling mills - Google Patents

Crown control for rolling mills Download PDF

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Publication number
US3610013A
US3610013A US841387A US3610013DA US3610013A US 3610013 A US3610013 A US 3610013A US 841387 A US841387 A US 841387A US 3610013D A US3610013D A US 3610013DA US 3610013 A US3610013 A US 3610013A
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US
United States
Prior art keywords
rolls
chucks
beams
bending
work rolls
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.)
Expired - Lifetime
Application number
US841387A
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English (en)
Inventor
Horst Pillon
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.)
Moeller and Neuman GmbH
Original Assignee
Moeller and Neuman 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 Moeller and Neuman GmbH filed Critical Moeller and Neuman GmbH
Application granted granted Critical
Publication of US3610013A publication Critical patent/US3610013A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B31/00—Rolling stand structures; Mounting, adjusting, or interchanging rolls, roll mountings, or stand frames
    • B21B31/08—Interchanging rolls, roll mountings, or stand frames, e.g. using C-hooks; Replacing roll chocks on roll shafts
    • B21B31/10—Interchanging rolls, roll mountings, or stand frames, e.g. using C-hooks; Replacing roll chocks on roll shafts by horizontally displacing, i.e. horizontal roll changing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B29/00—Counter-pressure devices acting on rolls to inhibit deflection of same under load, e.g. backing rolls ; Roll bending devices, e.g. hydraulic actuators acting on roll shaft ends

Definitions

  • the invention relates to a rolling mill for rolling fiat materials such as plates, strips and sheets with crown control means for bending at least the work rolls whose outer chucks are engaged by hydraulic bending devices which generate counter bending moments to equalize the deviations from a straight line by the jacket lines of the work rolls produced in the rolling gap during operation.
  • the chucks of the bent work rolls are subjected to the forces while in the other case the bending forces are exerted through additional outer chucks on the extended roll necks of the work rolls.
  • the bending cylinders of such prior art crown control arrangements are set either into the work roll chucks and operate as expansion devices designed for the crown control, or the cylinders are mounted on the stands and connected over their piston rods with the chucks or outer bearing members so as to be easily detachable for removing the work rolls laterally without wasting any time.
  • the invention consists essentially in that the bending devices engage on pairs of beams extending on both sides of the bearing members and disposed for vertical movement in the window openings of the stands, the pairs of beams guiding the bearing members of the rolls laterally,
  • the bending devices may be arranged for expansion between the pairs of flexing beams but it is preferable, particularly in plate or heavy sheet rooling mills, to mount the bending cylinders on the stands vin order to locate them out of the range of the rolling gap.
  • the work rolls are appropriately moved out together and in this case only the lower pair of beams must have slide rails by means of which the set of rolls is lifted up to a stop or an abutment shoulder by actuating the bending cylinders engaging at the lower beams.
  • the slide rails are in line with the transfer tracks which may be rolled laterally against the frame.
  • the lower beams are provided with openings at their extremities which project outwardly beyond the stands and roller type lever arms of two-arm levers mounted on the stands reach into these openings while their other lever arms are connected to the piston rods of hydraulic bending cylinders.
  • the bearing blocks of the two-arm levers may be guided for sliding movement on the stands cross-wise of the openings or may be secured in position.
  • roller type heads of the levers may be moved laterally out of openings or breaches of the flexing beams when they are to be dismounted also during an exchange of support rolls.
  • the bending devices for the upper beams are secured appropriately at stand parts which follow the screwdown movements of the upper roll or rolls, for example, on level adjustable stand caps of a tie rod rolling stand. In this manner it is obtained that the work stroke of the bending cylinders may be kept small and that the bending forces do not exert a stress on the screwdown devices.
  • the beams according to the invention operate not only to transfer to the work roll bearing members, if necessary in both possible directions, but function also as slide rails for the roll exchange and may constitute according to a further proposal of the invention supports for rolling mill fittings, such as scraper tools and devices 3 for supplying the spray-water, the cooling medium and the lubricant, and they assume thus a triple function.
  • the pressures exerted by the scraper tools produce moments in the beams which oppose those generated by the bending forces and thus avoid maximum bending stresses in the beams.
  • FIG. 1 is a front elevational view of the rolling mill in the rolling direction with the work rolls removed and,
  • FIG. 2 is a side elevational view of the frame partially in section to illustrate the two-arm bending lever.
  • the rolling stand consists of two U-shaped stand supports 1 and 2 with vertically adjustable stand caps 3 and 4 which are coupled under tension by means of tie rods not shown. These stand supports 1, 2 are connected through a girder 5 and the stand caps 3, 4 through a girder 6.
  • the lower stand supports 1, 2 supported on sole plates 7 are mounted below on a rigid girder 8 which carries at 9 and 10 hydraulic bending cylinders 11, 12 for pivotal movement whose piston rods 13, 14 engage on opposite necks a, 16a of bearing members 15, 16 which in turn are fitted around the extended necks of the lower support roll 17.
  • FIG. 2 only one bending cylinder 11 of a pair of bending cylinders is shown which are disposed on both sides of the frame.
  • the bending cylinders may be pivoted laterally as shown in dotted lines so that the bearing eyes 13a, 14a of the piston rods 13, 14 may be pulled off the opposite necks 15a, 16a when the lower support roll 17 and the chucks 18, 19 are to be dismounted laterally.
  • bending cylinders 21, 22 of similar construction are pivotally mounted on the upper girder 6 and engage in a similar manner on extended roll necks of the support roll 20.
  • the upper support roll 20 is mounted in chucks 23, 24 which are supported at 23a (FIG. 2) on the stand caps 3, 4.
  • the bending cylinders 21, 22 for the upper support roll 20 provide also a balancing of this roll and its chucks.
  • the lower beams 31 for the chucks 28 of the lower work roll 26 have further lugs 31b which constitute the slide rails for removing a set of work rolls.
  • the bending cylinders 36, 37 which may also be used together as two individual cylinders are connected over links 38, 39 to the upper girder 6.
  • the tie rods 34, 35 pull the upper flexing beams 30 upwardly whereby the bending forces are transferred over the lugs 30a to the chucks 27 of the upper work roll 25.
  • the lower flexing beams 31 could be connected in the same manner to bending cylinders which exert a downward pull but this is not suitable at the driving side of the frame.
  • the construction for generating downwardly directed bending forces for the lower work roll 26 may be seen in FIG. 2.
  • a pair of bending cylinders 40 on the driving side of the frame which are fixed to the one lower stand part 1 and engage at 41 a pair of two-arm levers 42.
  • These two-arm levers 42 are pivota bly mounted on swing bolts 43 which are mounted in slotted bearing blocks 44.
  • Each lever 42 has a short roller type lever arm 42a which engages a breach 31c of flexing beam 31.
  • the bearing blocks 44 are mounted cross-Wise of the breaches 310 of the lower flexing beams 31 for sliding movement on the lower stand parts 1, 2 and may be fixed in position. In this manner the swing bolts 43 amy be moved outwardly so that the roller type lever arms 42a move out of the breaches 310 of the lower flexing beams 31 in order to permit their removal.
  • the dismounting of the work rolls is carried out in the following manner:
  • the upper set of rolls namely the support roll 20 together with the upper Work roll 25, are raised by means of the screwdown device of the frame until between the work rolls-chucks 27, 28 spacer members may be inserted.
  • the double acting bending cylinders 40 are actuated so that the piston rods 40a move downwardly and the roller type lever arms 42a of the double arm levers 42 move the lower flexing beams 31 upwardly.
  • the slide rails 31b of the lower flexing beams 31 abut against the chucks 28 of the lower work roll and lift the chucks 27 of the upper work roll 25 over the inserted spacer elements from the lugs 30a of the upper flexing beams 30.
  • the chucks 18, 19 are set down on the dismounting tracks 53. Thereafter spacer members are placed between the chucks 18, 19 and the chucks 28 of the lower work roll and further between the pairs of chucks of the work rolls. Further spacer members are inserted between the chucks 27 of the upper work roll 25 as well as the chucks 23, 24 of the upper support roll 20 for which purpose previously the piston rods 34, 35 of the bending cylinders 36, 37 for the upper flexing beams 30, 31 are pivoted laterally away from their connector bolt 32. When subsequently the screwdown device is actuated in order to raise the support rolls-chucks the work rolls-chucks 27 remain in position.
  • a rolling mill comprising: a stand provided with spaced openings; at least two rolls, chucks mounting said rolls for rotation and means supporting said chucks from said stand for vertical movement within said openings;
  • beams associated with said rolls including portions thereof extending laterally of said rolls, said beams being provided with lugs encompassing portions of said chucks supporting said rolls while permitting said rolls to slide therealong; means adjusting the position of said beams to impart bending forces to said rolls through said chucks compensating for deflection in said rolls; and
  • a rolling mill as in claim 1 including a trackway positioned adjacent said stand for transporting said rolls to and from the rolling mill, and means stopping said beams when said lugs are in juxtaposition with said trackway permitting removal of said rolls along said lugs onto said trackway.
  • said means adjusting the position of said beams further includes second hydraulic cylinders mounted on said stand, second piston rods, means actuating said second piston rods by said second hydraulic cylinders and means connecting said second piston rods and said upper beam.
  • a rolling mill as in claim 4 said stand including caps, means vertically adjusting said caps in relation to the remainder of said stand, said second hydraulic cylinders used to adjust the position of said upper beam being supported by said caps.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
  • Metal Rolling (AREA)
US841387A 1968-07-19 1969-07-14 Crown control for rolling mills Expired - Lifetime US3610013A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT697868A AT284046B (de) 1968-07-19 1968-07-19 Walzwerk für Bleche, Bänder oder Folien, mit Balligkeitssteuerung

Publications (1)

Publication Number Publication Date
US3610013A true US3610013A (en) 1971-10-05

Family

ID=3591604

Family Applications (1)

Application Number Title Priority Date Filing Date
US841387A Expired - Lifetime US3610013A (en) 1968-07-19 1969-07-14 Crown control for rolling mills

Country Status (5)

Country Link
US (1) US3610013A (fr)
AT (1) AT284046B (fr)
BE (1) BE736144A (fr)
FR (1) FR2013227A1 (fr)
GB (1) GB1273058A (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100263559A1 (en) * 2009-04-17 2010-10-21 Neschen Americas Apparatus and method for controlling roller nip force
CN108971230A (zh) * 2018-09-12 2018-12-11 安徽马钢设备检修有限公司 一种四辊式轧机机架工作辊耐磨衬板专用吊装工装
JP2023512235A (ja) * 2020-01-29 2023-03-24 エス・エム・エス・グループ・ゲゼルシャフト・ミト・ベシュレンクテル・ハフツング 圧延装置
CN117602300A (zh) * 2023-12-31 2024-02-27 中重科技(天津)股份有限公司 一种工作辊平衡缸转移装置
EP4338942A1 (fr) * 2022-08-10 2024-03-20 Hitachi Power Solutions Co., Ltd. Machine de presse à rouleaux

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100263559A1 (en) * 2009-04-17 2010-10-21 Neschen Americas Apparatus and method for controlling roller nip force
US8408123B2 (en) * 2009-04-17 2013-04-02 Neschen Americas Apparatus and method for controlling roller nip force
CN108971230A (zh) * 2018-09-12 2018-12-11 安徽马钢设备检修有限公司 一种四辊式轧机机架工作辊耐磨衬板专用吊装工装
JP2023512235A (ja) * 2020-01-29 2023-03-24 エス・エム・エス・グループ・ゲゼルシャフト・ミト・ベシュレンクテル・ハフツング 圧延装置
US11745234B2 (en) 2020-01-29 2023-09-05 Sms Group Gmbh Rolling device
EP4338942A1 (fr) * 2022-08-10 2024-03-20 Hitachi Power Solutions Co., Ltd. Machine de presse à rouleaux
CN117602300A (zh) * 2023-12-31 2024-02-27 中重科技(天津)股份有限公司 一种工作辊平衡缸转移装置

Also Published As

Publication number Publication date
AT284046B (de) 1970-08-25
DE1929942B2 (de) 1973-02-08
GB1273058A (en) 1972-05-03
DE1929942A1 (de) 1970-01-22
BE736144A (fr) 1969-12-31
FR2013227A1 (fr) 1970-03-27

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