US3736785A - Rolling mill - Google Patents

Rolling mill Download PDF

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Publication number
US3736785A
US3736785A US00141310A US3736785DA US3736785A US 3736785 A US3736785 A US 3736785A US 00141310 A US00141310 A US 00141310A US 3736785D A US3736785D A US 3736785DA US 3736785 A US3736785 A US 3736785A
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US
United States
Prior art keywords
roll
rolls
pins
pair
chocks
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
US00141310A
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English (en)
Inventor
H Marten
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.)
Siemag Siegener Maschinenbau GmbH
Original Assignee
Siemag Siegener Maschinenbau 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 Siemag Siegener Maschinenbau GmbH filed Critical Siemag Siegener Maschinenbau GmbH
Application granted granted Critical
Publication of US3736785A publication Critical patent/US3736785A/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
    • B21B31/106—Vertical displacement of rolls or roll chocks during horizontal roll changing

Definitions

  • ABSTRACT This disclosure of this invention relates to a roll stand of a rolling mill wherein the working rolls are lowered and raised together with their corresponding chocks, in which on the bottom side of the upper roll or on the upper side of the bottom roll there are mounted spacer pins which in the rolling operation pass into corresponding indentations on the opposite surfaces of the chocks of the other roll, but which during roll changing when the roll sets are lowered or raised engage supporting surfaces of the opposite surfaces of the checks of the other rolls, subsequent to a relative displacement of both rolls in axial direction, to thereby maintain the rolls at a distance to each other during roll changing.
  • the steps worked into the interworking surfaces of the chocks of the upper and bottom rolls represent a large expense because they can only be manufactured with exactitude by complicated milling operations.
  • the steps formed on the chocks allow for only a limited height displacement between the rolls at a fixed distance from each other for the changing of the rolls because through the making of relatively high step heights an excessive weakening of the chocks would occur.
  • relatively low step heights subject to the attainable low height displacement, differently designed chocks are necessary for the rolls of different diameters, thus resulting in high construction expenditures for the roll stands.
  • the object of the invention is to further develop the known roll stand according to the aforesaid U. S. Pat. No. 3,541,830. More particularly, the object is to improve the construction of the spacer devices which assure the maintaining of the distance between the bottom rolls and the upper rolls of a set of rolls when changing the rolls, which on one hand can be produced easily and inexpensively and which would also allow a height displacement by means of which a larger roll diameter difference can be bridged. Furthermore, a more precise fixation of the rolls of a set of rolls to each other and an assured synchronization thereof during the changing process.
  • the solution in accordance with the invention, consists of providing spacer devices in the form of at least two pins to which on the opposite surfaces of the chocks of the roll there are assigned recesses in the form of bores into which the pins extend, preferably without touching in a manner not to restrict vertical movement of the rolls during rolling.
  • a remarkable characteristic of the invention is that the free ends of the pins provided on the chocks present conic ends to which there are assigned suitable centering depressions in an axial direction of the rolls on the surfaces of the other chocks lying next to the bores and on the same side of the pins.
  • the centering depressions are arranged in an axial direction displaced to a certain extent in relation to the bores in such a manner that the pins provide during roll changing a stable stop connection between the rolls of a roll set in addition to holding them apart.
  • the invention provides for the pins, bores and centering depressions to be located as closely as possible to the lateral bearing surfaces of the chocks, i.e., the surfaces furthest away from the bores of the bearings of the rolls.
  • FIG. 1 is a schematic simplified representation of a portion of a roll stand with the rolls illustrated in their operating positions, except that the lower roll is shown supported on roll changing rails,
  • FIG. 2 is a view similar to FIG. 1, however, with the rolls in a position for carrying out the roll changing operation, and
  • FIG. 3 is an end elevational view of the parts shown in FIG. 2, but including in addition the entire mill stand.
  • the drawings show that in the windows 1 of both roll housing 2 the upper work roll 3 is displaceably supported for elevational height setting on vertical movement of their chocks 5 by an upper mill screw, as is the bottom work roll 4 through its chocks 6 by a lower mill screw.
  • the chocks 5 and 6 of the rolls 3 and 4 are urged apart by roll balance piston cylinder assemblies which, as shown, engage horizontal projections formed on the chocks.
  • the drawing also shows the chocks 6 of the bottom roll 4 supported on a pair of rails which, as noted before, depict the roll changing condition.
  • the roll balance associated with the chocks 5 is also utilized to lift the upper roll 3 with its chocks from the bottom roll 4 and lower it again after the roll 4 has been moved axially which operation will be explained more fully later on.
  • each chock 6 of the bottom roll 4 is provided on the surface facing the roll gap with two pins 18 which are located near both lateral bearing surfaces of the chocks 6 adjoining the gliding surfaces of the housing windows 1.
  • Each chock 5 of the upper roll 3 is, according to FIGS. 1 to 3 of the drawings, correspondingly provided on the surface facing the roll gap with two bores 19 into which the pins 18 pass, preferably without touching, during the rolling operation as it can clearly be seen from FIG. 1 of the drawings.
  • the upper roll 3 In preparation for roll changing the upper roll 3 is lifted with its chocks 5, for instance, by means of the roll balance piston cylinder assemblies until the pins 18 of the chocks 6 protrude completely from the bores 19 of the chocks 5. Subsequently, the bottom work roll 4 with its chocks 6 is transported by means of the roll changing device 13 in an axial direction relative to the rolls a predetermined distance indicated by the legend X in FIG. 2. In this movement the lower work roll is separated from the lower backup roll which has been lowered by the mill screw. Thus, the pins 18 are displaced away from the bores 19 and arrive directly below a surface zone 20 of the upper roll chocks 5 adjoining the bores 19.
  • the upper work roll 3 with its chocks 5 is lowered until the chocks with their surface zone 20 are supported on the free end of the pins 18.
  • the roll bodies of the upper work roll 3 and bottom work roll 4 are thereby kept at a distance from each other, that is to say, they cannot touch during the execution of the roll changing process.
  • the free ends of the pins 18 are provided with conic end 21, while into the surface zone 20 of the chocks 5 there are provided complementing centering depressions 22.
  • the conic ends 21 of the pins 18 and the centering depressions 22 in the chocks 5 come into contact with each other, and thus form a stable support for the individual components of the roll set during the roll change.
  • the bores 19 and the centering depressions 22 in the chocks can be very simply manufactured.
  • the pins 18 do not have to be manufactured in one piece with the chocks. They can be formed as turned pieces and then be inserted firmly into the chocks in a very simple manner. Their length depends on the desired height displacement between work rolls 3 and 4 of the roll set, during the roll change. Thus it is possible to utilize the same set of roll chocks 5 and 6 for the support and guidance of the rolls 3 and 4 even though they present a larger diameter difference.
  • bearing chock assemblies mounted on journals of each roll to form two cooperative sets of bearing chock assemblies
  • each of said upper bearing chock assemblies arranged to receive a pair of said pins of the same set of chock assemblies and wherein said pins have lengths slightly less than the depths of said bores so that during rolling the pins do not interfere with the vertical movement of said rolls,
  • each bore being engageable by each of said pins when one of said rolls is moved axially of the other roll, said recesses being conically formed to form self-centering depressions for said outer ends of said pins, whereby assemblies is carried by said bearing chock assemblies of said lower roll.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
  • Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
US00141310A 1970-05-08 1971-05-07 Rolling mill Expired - Lifetime US3736785A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2022385A DE2022385B2 (de) 1970-05-08 1970-05-08 Walzgerüst mit über eine Walzenwechselvorricntun9 durch die Fenster der Wal2enständer ein- und ausfahrbaren Arbeitswalzensätzen

Publications (1)

Publication Number Publication Date
US3736785A true US3736785A (en) 1973-06-05

Family

ID=5770497

Family Applications (1)

Application Number Title Priority Date Filing Date
US00141310A Expired - Lifetime US3736785A (en) 1970-05-08 1971-05-07 Rolling mill

Country Status (4)

Country Link
US (1) US3736785A (OSRAM)
BE (1) BE766861R (OSRAM)
DE (1) DE2022385B2 (OSRAM)
FR (1) FR2088426B2 (OSRAM)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5090228A (en) * 1988-12-23 1992-02-25 Sms Engineering, Inc. Window and roll chock arrangement for a rolling mill
RU2227072C2 (ru) * 2000-07-04 2004-04-20 Открытое акционерное общество "Электростальский завод тяжелого машиностроения" Редукционно-растяжной стан
CN102470408A (zh) * 2009-07-07 2012-05-23 Sms西马格股份公司 用于锁止轧辊组的轴向轴承壳体和轴承座以及换辊车的装置
CN103084404A (zh) * 2013-02-18 2013-05-08 一重集团大连设计研究院有限公司 冷轧机组支承辊换辊自动摘钩装置
CN105382030A (zh) * 2015-12-14 2016-03-09 安徽楚江特钢有限公司 一种轧机的工作辊换辊方法
US11565292B2 (en) 2015-09-24 2023-01-31 Sms Group Gmbh Roll stand and method for changing work rolls

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111790758B (zh) * 2020-05-29 2022-07-15 首钢京唐钢铁联合有限责任公司 一种精轧机下阶梯垫的标定方法及自动换辊控制方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2500957A (en) * 1944-11-22 1950-03-21 Norlindh Sven Erik Malte Roll bearing device
US2645955A (en) * 1951-02-13 1953-07-21 Nat Machinery Co Outboard bearing for metal rolling apparatus
US3541830A (en) * 1967-05-29 1970-11-24 Siegener Maschinenbau Gmbh Rolling mill roll changing
US3583194A (en) * 1968-03-20 1971-06-08 Us Steel Corp The Horizontal roll stand for slab mill
US3589161A (en) * 1969-07-22 1971-06-29 Gulf & Western Ind Prod Co Work roll automatic spacing means

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2500957A (en) * 1944-11-22 1950-03-21 Norlindh Sven Erik Malte Roll bearing device
US2645955A (en) * 1951-02-13 1953-07-21 Nat Machinery Co Outboard bearing for metal rolling apparatus
US3541830A (en) * 1967-05-29 1970-11-24 Siegener Maschinenbau Gmbh Rolling mill roll changing
US3583194A (en) * 1968-03-20 1971-06-08 Us Steel Corp The Horizontal roll stand for slab mill
US3589161A (en) * 1969-07-22 1971-06-29 Gulf & Western Ind Prod Co Work roll automatic spacing means

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5090228A (en) * 1988-12-23 1992-02-25 Sms Engineering, Inc. Window and roll chock arrangement for a rolling mill
RU2227072C2 (ru) * 2000-07-04 2004-04-20 Открытое акционерное общество "Электростальский завод тяжелого машиностроения" Редукционно-растяжной стан
CN102470408A (zh) * 2009-07-07 2012-05-23 Sms西马格股份公司 用于锁止轧辊组的轴向轴承壳体和轴承座以及换辊车的装置
CN102470408B (zh) * 2009-07-07 2015-01-14 Sms西马格股份公司 用于锁止轧辊组的轴向轴承壳体和轴承座以及换辊车的装置
CN103084404A (zh) * 2013-02-18 2013-05-08 一重集团大连设计研究院有限公司 冷轧机组支承辊换辊自动摘钩装置
US11565292B2 (en) 2015-09-24 2023-01-31 Sms Group Gmbh Roll stand and method for changing work rolls
CN105382030A (zh) * 2015-12-14 2016-03-09 安徽楚江特钢有限公司 一种轧机的工作辊换辊方法
CN105382030B (zh) * 2015-12-14 2018-02-23 安徽楚江特钢有限公司 一种轧机的工作辊换辊方法

Also Published As

Publication number Publication date
FR2088426A2 (OSRAM) 1972-01-07
BE766861R (fr) 1971-10-01
FR2088426B2 (OSRAM) 1974-03-08
DE2022385A1 (de) 1971-12-02
DE2022385B2 (de) 1975-11-20

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