US3707180A - Method for advancing a continuously cast ingot along a curved withdrawal path - Google Patents

Method for advancing a continuously cast ingot along a curved withdrawal path Download PDF

Info

Publication number
US3707180A
US3707180A US108003A US3707180DA US3707180A US 3707180 A US3707180 A US 3707180A US 108003 A US108003 A US 108003A US 3707180D A US3707180D A US 3707180DA US 3707180 A US3707180 A US 3707180A
Authority
US
United States
Prior art keywords
ingot
rolls
driven
path
along
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
US108003A
Other languages
English (en)
Inventor
Gerd Vogt
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.)
Vodafone GmbH
Original Assignee
Mannesmann AG
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
Priority claimed from DE19702004763 external-priority patent/DE2004763C/de
Application filed by Mannesmann AG filed Critical Mannesmann AG
Application granted granted Critical
Publication of US3707180A publication Critical patent/US3707180A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/12—Accessories for subsequent treating or working cast stock in situ
    • B22D11/128—Accessories for subsequent treating or working cast stock in situ for removing
    • B22D11/1282—Vertical casting and curving the cast stock to the horizontal

Definitions

  • ABSTRACT A continuously cast curved ingot is withdrawn from the mold by forces distributed so that one-tenth to one [30] Foreign Application Priority Data Jan. 29, 1970 Germany
  • the present invention relates to method for controlled withdrawal of a continuously cast steel ingot to be guided along a curved path by means of several driven support and guiding roll's.
  • the withdrawal of a continuously cast, steel ingot from a curved casting mold requires considerable forces, particularly if the dimensions of the ingot are rather large.
  • German Pat. No. 1,250,973 it is known to-withdraw the ingot from curved, continuously casting equipment by means of driven support and guide rolls which are provided in addition to the usual transport rolls. Thisis particularly true for the withdrawal ,of ingots with a still liquidous core as the usual case.
  • German printed Patent application No. 1,902,117 and German Pat. No. 1,187,753 it has been suggested for other reasons to provide particular relationship between the several rolls as far as torque is concerned or to organize the several rolls into groups and to determine the torque as to the several groups of rolls.
  • British Pat. No. 941,290 it has been suggested to drive some of the rolls along the outer (lower) path of a curved ingot faster than on the inside, but neither any division or particular organization of torque and applied forces as to the two different sides of the ingot is mentioned in that patent nor does that patent disclose any rule concerning the advance of the rolls that are to be driven faster.
  • the invention particularly is based on the afore-mentioned state of the art, and the problem solved is to particularly distribute the drive forces for the ingot on both sides for extracting same from the mold under consideration that the withdrawn ingot has a still liquidous core.
  • the forces are to be applied upon the withdrawn ingot as uniform as possible as they are effective in the solidifying and solidified cross section. It is a particular object of the invention to set forth rules concerning minimization of the forces that are to be so applied.
  • the calculation of the required forces to be imparted upon such an ingot as a whole for its withdrawal from the mold, is known per se and is not subject of this invention.
  • the invention is related to the distribution of these forces as they are provided by the individual rolls.
  • the calculation of that distribution is preferably based on the'condition that an individual roll provides contact pressure force, for the transmission of a particular torque, corresponding to the 1to 1.5-fold value of the load on the roll by operation of the ferro-static pressure in the ingot.
  • the calculation then leads to the total amount of the rolls that are to be driven on basis of the general rule as stated above.
  • the FIGURE illustrates somewhat schematically a withdrawal path for an ingot as it is being withdrawn and veered from the vertical to the horizontal after leaving a mold.
  • a mold M having a particular curvature and from which is withdrawn an ingot S.
  • the cross-sectional view of the drawing shows the growth in the solidified skin Ss and the reduction in the cross-sectional dimension of the still liquidous core S1.
  • the ingot leaves the mold in curved configuration with a particular radius, and guide rolls such as 1 are disposed to support and to guide the ingot along a correspondingly curved path.
  • Point A is a first bending point for the ingot to increase the radius of curvature
  • point B is a second bending point for further increasing the radius of curvature of the ingot
  • at bending point C the ingot has been straightened.
  • Rolls on the inside of the curved path guide and support the ingot from above, rolls on the outside path provide also for support, from below of the ingot.
  • the drawing is schematic but it can be seen that in accordance with reality some of the steel is still liquidous beyond bending point C from where the ingot proceeds horizontally.
  • the guiding and driving of ingot S for purposes of its withdrawal therefore, does in fact require engagement between driven rolls and skin Ss of the ingot at those portions where there is still a liquidous core S1.
  • the schematic showing of the drawing clearly illustrates that in the first portion of the veering path the solidified skin is quite thin.
  • rolls 1 as illustrated are merely guide rolls and are not driven; those that are driven are collectively marked, and they are individually designated by reference numerals 2 through 12.
  • the reason for eleven driven rolls is based on a particular case and is representative only. in the particular example it is assumed that the torques of the driven rolls 2 12 are all similar, and that the driven rolls have similar diameter. Therefore, the forces imparted by the several rolls upon the casting ingot, are similar. It may be assumed further that the total force needed to drive the ingot for purposes of its withdrawal is about-88 metric tons. Finally, it is assumed that each rollis urged against the ingot at a contact pressure force that is the L3 fold value of the particular ferro-static load as effective-in the particular point of the ingot so engaged.
  • rolls 4, 10, 11 and 12 engage the ingot in places where having solidified throughout. For these rolls, therefore, there is the rule that their contact pressure force is to be equal to the contact pressure force provided by the last one of the rolls that acts upon a portion of the ingot where there is still some non- "means of springs (not shown).
  • the total number of rolls to be driven is eleven, and these are the driven rolls 2 12. This holds true essentially independently from the distribution of the particular locations of the driven rolls along the withdrawal path.
  • the invention now concerns particular rules for such a distribution.
  • the ratio of the total driving forces imparted by rolls upon the upper side of the ingot, along the inside of the curved path, and of the total of the driving forces imparted by other rolls upon the lower side along the outer path, is to be within the range of 0.1 to 0.5, for example, three-eighth.
  • this particular distribution is based on the assumption that all rolls provide similar torques, have similar diameters, and, therefore, provide similar driving forces. This, however, does not preclude that their torques do, in fact, differ, and that there is a variable torque distribution in longitudinal direction along the travel path of the ingot, in a known manner.
  • the sum total of the driving forces acting on the upper side and the sum total of the driving forces acting on the lower side and/or their particular ratio relation can readily be maintained, or varied within the stated range, on basis of such unequal distribution of torque in longitudinal direction.
  • Method as in claim 1 with straightening of the ingot along the withdrawal path by operation of several bending points, including the step of providing a driven roll on the lower side of the ingot in each bending point.
  • Method as in claim 1 including the step of using a contact pressure force for the driven rolls of about 1 to 1.5' the ferrostatic pressure and providing a larger number of driven rolls on the lower side than on the upper side.
US108003A 1970-01-29 1971-01-20 Method for advancing a continuously cast ingot along a curved withdrawal path Expired - Lifetime US3707180A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19702004763 DE2004763C (de) 1970-01-29 Betriebsweise von angetriebenen Stutz und Fuhrungsrollen einer bogen formigen Strangfuhrungsbahn

Publications (1)

Publication Number Publication Date
US3707180A true US3707180A (en) 1972-12-26

Family

ID=5761273

Family Applications (1)

Application Number Title Priority Date Filing Date
US108003A Expired - Lifetime US3707180A (en) 1970-01-29 1971-01-20 Method for advancing a continuously cast ingot along a curved withdrawal path

Country Status (8)

Country Link
US (1) US3707180A (ja)
JP (1) JPS5030575B1 (ja)
AT (1) AT306269B (ja)
CA (1) CA943322A (ja)
FR (1) FR2077391B1 (ja)
GB (1) GB1297471A (ja)
NL (1) NL165672B (ja)
SE (1) SE361831B (ja)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3776298A (en) * 1971-07-02 1973-12-04 Mannesmann Ag Apparatus for controlling the pressure force in multi-roll drives for equipment withdrawing an ingot from a continuous casting machine along a curved path
US3918514A (en) * 1973-03-15 1975-11-11 Allis Chalmers Method of bending or straightening a continuously cast metal strand with controlled cooling
US4122888A (en) * 1975-04-30 1978-10-31 Vereinigte Osterreichische Eisen- Und Stahlwerke - Alpine Montan Aktiengesellschaft Method of guiding a cast strand and arrangement for carrying out the method
US4465121A (en) * 1981-04-30 1984-08-14 Concast Service Union Ag Method and apparatus for bending a strand in a continuous casting installation for metals, especially steel
US4844145A (en) * 1987-11-03 1989-07-04 Steel Metallurgical Consultants, Inc. Bending of continuously cast steel with corrugated rolls to impart compressive stresses
US6155332A (en) * 1998-11-06 2000-12-05 Voest-Alpine Industrieanlagenbau Gmbh Process for continuously casting metal and continuous casting apparatus used thereof

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5219481A (en) * 1975-08-04 1977-02-14 Nec Home Electronics Ltd Lighting device for use in a discharge lamp
JPS5378680A (en) * 1976-12-22 1978-07-12 Kinmon Denki Kk Device for firing discharge lamp
DE3011137B1 (de) * 1980-03-22 1981-08-20 Mannesmann Demag Ag, 4100 Duisburg Verfahren zum Regeln der Einzelantriebe einerbogenstranggiess-Vielrollenmaschine fuer Metall,insbes. fuer Stahl,und Antriebsanordnung dazu

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2947075A (en) * 1956-09-21 1960-08-02 Moossche Eisenwerke Ag Method for the continuous casting of metal strip, and strip casting plant for carrying out the method
US3290741A (en) * 1960-11-18 1966-12-13 Olsson Erik Allan Methods of bending casting in a continuous casting process
US3324931A (en) * 1963-05-03 1967-06-13 Mannesmann Ag Method of deflecting towards the horizontal a curved continuously cast descending billet
US3446270A (en) * 1966-05-09 1969-05-27 Bliss Co Apparatus for continuous casting
US3542118A (en) * 1967-12-20 1970-11-24 Concast Inc Dummy bar handling mechanism

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT275775B (de) * 1967-02-24 1969-11-10 Mannesmann Ag Verfahren zum Fördern und Führen von Strängen in Stranggießanlagen

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2947075A (en) * 1956-09-21 1960-08-02 Moossche Eisenwerke Ag Method for the continuous casting of metal strip, and strip casting plant for carrying out the method
US3290741A (en) * 1960-11-18 1966-12-13 Olsson Erik Allan Methods of bending casting in a continuous casting process
US3324931A (en) * 1963-05-03 1967-06-13 Mannesmann Ag Method of deflecting towards the horizontal a curved continuously cast descending billet
US3446270A (en) * 1966-05-09 1969-05-27 Bliss Co Apparatus for continuous casting
US3542118A (en) * 1967-12-20 1970-11-24 Concast Inc Dummy bar handling mechanism

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3776298A (en) * 1971-07-02 1973-12-04 Mannesmann Ag Apparatus for controlling the pressure force in multi-roll drives for equipment withdrawing an ingot from a continuous casting machine along a curved path
US3918514A (en) * 1973-03-15 1975-11-11 Allis Chalmers Method of bending or straightening a continuously cast metal strand with controlled cooling
US4122888A (en) * 1975-04-30 1978-10-31 Vereinigte Osterreichische Eisen- Und Stahlwerke - Alpine Montan Aktiengesellschaft Method of guiding a cast strand and arrangement for carrying out the method
US4465121A (en) * 1981-04-30 1984-08-14 Concast Service Union Ag Method and apparatus for bending a strand in a continuous casting installation for metals, especially steel
US4844145A (en) * 1987-11-03 1989-07-04 Steel Metallurgical Consultants, Inc. Bending of continuously cast steel with corrugated rolls to impart compressive stresses
US6155332A (en) * 1998-11-06 2000-12-05 Voest-Alpine Industrieanlagenbau Gmbh Process for continuously casting metal and continuous casting apparatus used thereof

Also Published As

Publication number Publication date
AT306269B (de) 1973-04-10
DE2004763A1 (de) 1971-08-12
CA943322A (en) 1974-03-12
GB1297471A (ja) 1972-11-22
FR2077391A1 (ja) 1971-10-22
FR2077391B1 (ja) 1975-06-06
SE361831B (ja) 1973-11-19
JPS5030575B1 (ja) 1975-10-02
NL165672B (nl) 1980-12-15
NL7101172A (ja) 1971-08-02

Similar Documents

Publication Publication Date Title
US3707180A (en) Method for advancing a continuously cast ingot along a curved withdrawal path
US4043382A (en) Method and apparatus for continuously casting steel
ES405882A1 (es) Procedimiento y aparato para enderezar piezas de fundicion continua.
US3978909A (en) Mold with convex sidewalls for continuous casting machines
DE19639302C2 (de) Verfahren und Vorrichtung zur Erzeugung von dünnen Brammen auf einer Stranggießanlage
DE4139242C2 (ja)
DE10051959A1 (de) Verfahren und Vorrichtung zum Stranggießen und anschließendem Verformen eines Gießstranges aus Stahl, insbesondere eines Gießstranges mit Blockformat oder Vorprofil-Format
CN101733376B (zh) 车轴钢连铸方法
EP0181566A1 (de) Verfahren und Vorrichtung zum Bandstranggiessen von Metallen, insbesondere von Stahl
US3566951A (en) Method of equalizing stresses in the conveyance and guidance of continuous castings
US3645323A (en) Roll system for continuous casting machines
EP0917922A1 (de) Verfahren und Anlage zum Stranggiessen von Brammen
GB1565845A (en) Support and guide rolls for continuous casting plants
EP0417492B1 (en) Vertical continuous casting method and casting apparatus
US7025118B2 (en) Method and device for continuously casting ingots, slabs or thin slabs
EP0036490B1 (de) Verfahren und Antriebsanordnung zum Regeln der Einzelantriebe einer Bogenstranggiess-Vielrollenmaschine für Metall, insbesondere für Stahl
US3900066A (en) Apparatus for continuous casting a metal strand shaped to provide concave surfaces
AT522265B1 (de) Umbau einer stranggiessanlage für knüppel- oder vorblockstränge
CA1131875A (en) Strand guide arrangement to be used in a continuous casting plant
EP1050355A2 (de) Verfahren und Vorrichtung zum Herstellen von stranggegossenen Stahlerzeugnissen
DE3440235A1 (de) Verfahren und vorrichtung zum bandstranggiessen von metallen, insbesondere von stahl
JP2983152B2 (ja) 連続鋳造方法および連続鋳造設備
EP0920938B1 (de) Verfahren und Vorrichtung zur Erzeugung von dünnen Brammen auf einer Stranggiessanlage
DE3331575C2 (de) Verfahren zum Bogenstranggießen von Metall, insbesondere von Stahl
EP3323529B1 (de) Stranggiessanlage mit flexibler konfiguration der richtstrecke