EP0087297A2 - Streckrichtmaschine - Google Patents

Streckrichtmaschine Download PDF

Info

Publication number
EP0087297A2
EP0087297A2 EP83300867A EP83300867A EP0087297A2 EP 0087297 A2 EP0087297 A2 EP 0087297A2 EP 83300867 A EP83300867 A EP 83300867A EP 83300867 A EP83300867 A EP 83300867A EP 0087297 A2 EP0087297 A2 EP 0087297A2
Authority
EP
European Patent Office
Prior art keywords
rolls
work
work rolls
leveller
diameter
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Withdrawn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
EP83300867A
Other languages
English (en)
French (fr)
Other versions
EP0087297A3 (de
Inventor
Harry Laurence Fred Bond
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.)
Davy Mckee Sheffield Ltd
Original Assignee
Davy Mckee Sheffield 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 Davy Mckee Sheffield Ltd filed Critical Davy Mckee Sheffield Ltd
Publication of EP0087297A2 publication Critical patent/EP0087297A2/de
Publication of EP0087297A3 publication Critical patent/EP0087297A3/de
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D1/00—Straightening, restoring form or removing local distortions of sheet metal or specific articles made therefrom; Stretching sheet metal combined with rolling
    • B21D1/02—Straightening, restoring form or removing local distortions of sheet metal or specific articles made therefrom; Stretching sheet metal combined with rolling by rollers

Definitions

  • This invention relates to a tension leveller for metal strip in elongate form. Tension levellers are used to improve the shape, that is the flatness, of the product.
  • a tension leveller has two sets of work rolls which are staggered and which cause the strip to pass through the leveller along a sinusoidal path and to be flexed under tension in opposite directions alternately. It is of course important that no bending of any of the leveller work rolls should occur, since if bending occurs the flatness of the product suffers. Therefore, where circumstances allow, either very large work rolls are used which are stiff enough to support the applied loads without deflection, or, if small work rolls have to be used, these require to be supported by back-up rolls.
  • the strip speed through a stretch leveller is low, e.g. 5 metres/second, compared with the speed through a tandem strip mill (up to 20 metres/second).
  • the bearings for the leveller rolls are well able to transmit the loading applied to the work rolls by the strip.
  • An object of the present invention is to provide a construction of leveller which, although usable in other applications, may be employed in a cold tandem rolling mill.
  • a tension leveller for metal strip in elongate form comprises according to the present invention two sets of work rolls which, in each set, are spaced apart in the direction of the strip path, the work rolls of one set being staggered relative to the work rolls of the other set so that, in use, the strip is constrained to a sinusoidal path by contact with successive work rolls, characterised in that each work roll is engaged and supported by two back-up rolls so that the bearings of the work rolls are relieved of significant loading both transversely of, and normal to, the mean pass-line of the strip through the leveller, and in that each of the back-up rolls has a diameter at least one and a quarter times the diameter of the work rolls.
  • the ratio of the diameter of the back-up .rolls to the diameter of the work rolls is at least 1.5.
  • that ratio is between 1.25 and 2 and the diameter of the work rolls is between 80 mm and 180 mm.
  • the invention is based on an appreciation of the fact that the work roll spacing in a tension leveller may be greater than that usual in leveller lines and that consequentially the restriction on the diameter of the back- up rolls need not be as severe as previously thought necessary.
  • the diameter of the work rolls can be small, the diameter of the back-up rolls can be increased in order to accommodate the strip speed in a tandem mill whilst keeping the speed of the back-up rolls within the safe load bearing limits for the bearings.
  • the work roll bearings are subject only to insignificant loading and can therefore operate at the high speeds resulting from the high strip speed and the small diameter of the work roll.
  • each back-up roll extends over the entire barrel length of the work rolls with which it is in contact.
  • the use of long barrel length back-up rolls is made possible by their increased diameter and results in the reduction of the number of bearings to a minimum of two per back-up roll. Consequently, the problems resu-lting from the presence of roll coolant and rolling lubricant is reduced to tolerable levels.
  • the invention provides the combination of a tandem cold strip mill and a tension leveller as described above, arranged between two consecutive stands of the mill.
  • the upper set of work rolls of the leveller with its back-up rolls is movable away from the lower set for threading of the strip through the mill and the lower set of work - rolls are arranged to guide the strip along a designated pass-line between the consecutive stands, for threading.
  • deflector rolls which, when the work rolls are in operative position, guide the strip into and out of the leveller along that pass-line.
  • the cold tandem mill is represented by the rolls of two consecutive stands 1 and 2, which may in fact be stands 4 and 5 of the mill.
  • the strip 3 leaving stand 1 passes over a tensiometer 4, through a tension leveller 5, and is led into stand 2 by an entry guide 6.
  • Tension leveller 5 shown in greater detail in Figure 2, is so mounted as to be removable from the mill line transversely to the passline, e.g. on slides as illustrated in the drawing at 12, or on wheels.
  • the tensiometer deflector roll of tensiometer 4 is indicated at 13.
  • the leveller has a framework 15 which can slide on the slides 12 and which carries the bearings for four leveller work rolls A to D and entry deflector roll E, eight back-up rolls F to L, and an exit deflector roll M.
  • each of the work rolls A to D is nested between, and in contact with, two of the back-up rolls F to L. Consequently, each work roll is restrained from bending both in the direction normal to the passline and in the direction of the passline.
  • the work roll bearings are therefore relieved of the need to transmit any significant part of the rolling load, which is taken by the back-up rolls F to L.
  • the spacing of the work rolls along the passline is larger than is customary in leveller lines.
  • Each of the backup rolls F to L has a relatively large diameter, which is made possible by the wide spacing of the work rolls, and which is at least one and a quarter times the diameter of the work rolls A to D and preferably at least one and a half times the latter diameter.
  • the ratio of the diameter of the back-up rolls to the diameter of the work rolls is between 1.1/2 and 2 and the diameter of the workrolls is between 80 and 180 mm. Because of the larger diameter of the back-up rolls, their rotational speed is relatively low, thus enabling their bearings to operate at the high loading. Because of the large diameter of each back-up roll, it is subject to little bending under the rolling loads and can be made to extend over the full barrel length of the work rolls with which it is in contact. Accordingly, each back-up roll has only two bearings which can be readily sealed and serviced.
  • the entry deflector roll E which ensures the correct angle of wrap of the strip around work roll D is similar to the work rolls and is supported by the back-up rolls H and I.
  • the upper set of rolls - the work rolls A and B, deflector roll E, and back-up rolls F to I are carried in a sub-housing 16 which can be raised in the framework 15 as by a hydraulic piston and cylinder arrangement 14.
  • the leveller By displacing the upper set of rolls vertically away from the lower set, the leveller can be opened to facilitate threading of the strip through the mill at start-up.
  • the passline through the leveller 'defined by the rolls 13 D, C and M coincide with the defined mill passline between deflector roll 13 and the downstream stand 2.
EP83300867A 1982-02-19 1983-02-18 Streckrichtmaschine Withdrawn EP0087297A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8204969 1982-02-19
GB8204969 1982-02-19

Publications (2)

Publication Number Publication Date
EP0087297A2 true EP0087297A2 (de) 1983-08-31
EP0087297A3 EP0087297A3 (de) 1984-03-28

Family

ID=10528468

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83300867A Withdrawn EP0087297A3 (de) 1982-02-19 1983-02-18 Streckrichtmaschine

Country Status (2)

Country Link
EP (1) EP0087297A3 (de)
JP (1) JPS58154417A (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013135688A1 (de) 2012-03-15 2013-09-19 Sms Siemag Ag Vorrichtung zum richten von metallband

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2733750A (en) * 1956-02-07 Roller leveller with double end drive
US3327509A (en) * 1966-05-10 1967-06-27 Maust Machinery Corp Roller leveling
DE1990324U (de) * 1968-08-01 Fa Josef Frohimg 5960 Olpe Richtmaschine fur dünne Bleche
DE2052670B2 (de) * 1969-10-27 1974-10-24 Sutton Engineering Co., Pittsburgh, Pa. (V.St.A.) Richtmaschine für Bleche u.dgl

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2733750A (en) * 1956-02-07 Roller leveller with double end drive
DE1990324U (de) * 1968-08-01 Fa Josef Frohimg 5960 Olpe Richtmaschine fur dünne Bleche
US3327509A (en) * 1966-05-10 1967-06-27 Maust Machinery Corp Roller leveling
DE2052670B2 (de) * 1969-10-27 1974-10-24 Sutton Engineering Co., Pittsburgh, Pa. (V.St.A.) Richtmaschine für Bleche u.dgl

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013135688A1 (de) 2012-03-15 2013-09-19 Sms Siemag Ag Vorrichtung zum richten von metallband

Also Published As

Publication number Publication date
EP0087297A3 (de) 1984-03-28
JPS58154417A (ja) 1983-09-13

Similar Documents

Publication Publication Date Title
US7665339B2 (en) Method for increasing the range of production of a metal product rolling installation and installation therefor
US4222255A (en) Rolling device having at least one controlled deflection roll
US5746081A (en) Reversing compact installation for cold rolling strip-shaped rolling material
US6619092B2 (en) Tandem rolling mill facility and rolling method using the same
CN1078111C (zh) 冷轧带状轧件的可逆式紧凑设备及其操作方法
EP0087297A2 (de) Streckrichtmaschine
US4248073A (en) Cluster type cold rolling mill
US4478064A (en) Modifications to a cooperative rolling system for increasing _maximum attainable reduction per pass
US5320266A (en) Strip storage arrangement with independent tension control of synchronously operated support carriages
DE19807554A1 (de) Walzgerüst und Walzverfahren
EP0109235B1 (de) Walzwerksteuerung für Tandem-Walzen
DE10036564A1 (de) Mehrwalzengerüst
US4462236A (en) Fourteen-high rolling mill
US4414832A (en) Start-up and steady state process control for cooperative rolling
US3318131A (en) Multiple-roll rolling mill for exchangeable work rolls of substantially varying diameter
US3918287A (en) Rolling stand prestressing system
JP2825984B2 (ja) 金属板の熱間仕上圧延装置および圧延方法
US5544516A (en) System to roll at least two sections in blocks of fast rolling mill stands
KR100607898B1 (ko) 조재의 압연설비 및 압연방법
EP0124991A1 (de) Walzwerk
US3283554A (en) Rolling mill guide in a multistrand rolling mill
Myers Gauge, shape and profile control using a shapemeter
US3533262A (en) Multiroll tandem mill construction
SU1574305A2 (ru) Вводна проводкова арматура
DE3103087A1 (de) Rollenfuehrung in einer stranggiessanlage fuer brammen

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): AT BE CH DE FR GB IT LI LU NL SE

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Designated state(s): AT BE CH DE FR GB IT LI LU NL SE

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19841129

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

RIN1 Information on inventor provided before grant (corrected)

Inventor name: BOND, HARRY LAURENCE FRED