US20050067135A1 - Method and casting machine for production of casting bars in the shape of billets or blocks - Google Patents

Method and casting machine for production of casting bars in the shape of billets or blocks Download PDF

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Publication number
US20050067135A1
US20050067135A1 US10/494,590 US49459004A US2005067135A1 US 20050067135 A1 US20050067135 A1 US 20050067135A1 US 49459004 A US49459004 A US 49459004A US 2005067135 A1 US2005067135 A1 US 2005067135A1
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United States
Prior art keywords
strand
region
rollers
roller pair
reduction
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.)
Abandoned
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US10/494,590
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English (en)
Inventor
Hans Streubel
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SMS Siemag AG
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Individual
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Filing date
Publication date
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Assigned to SMS DEMAG AKTIENGESELLSCHAFT reassignment SMS DEMAG AKTIENGESELLSCHAFT ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: STREUBEL, HANS
Publication of US20050067135A1 publication Critical patent/US20050067135A1/en
Priority to US11/807,141 priority Critical patent/US20080041554A1/en
Priority to US12/383,234 priority patent/US20090178777A1/en
Assigned to SMS SIEMAG AKTIENGESELLSCHAFT reassignment SMS SIEMAG AKTIENGESELLSCHAFT CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). Assignors: SMS DEMAG AKTIENGESELLSCHAFT
Abandoned legal-status Critical Current

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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
    • B22D11/1206—Accessories for subsequent treating or working cast stock in situ for plastic shaping of strands

Definitions

  • the invention relates to a method of producing cast bars or strands in shape of billets or ingots, with the strands being guided between pairs of rollers.
  • the strand thickness is reduced in a precisely directed manner in the region of the residual solidification with one or, preferably, several pairs of rollers.
  • the reduction of thickness in the region of soft reduction can be effected uniformly or non-uniformly.
  • the strand cross-sections for soft reduction are formed with one or several projections or recesses in order to obtain a noticeable improvement of the strand quality with a comparably low power requirement.
  • the soft-reduction starts in the straightening region of a cast strand by appropriately adjusting the rollers. To this end, the speed and strand cooling can be so adjusted that the residual solidification takes place in the straightening region.
  • the cast radius should be noticeably increased. This results in increased costs of a corresponding installation. Furthermore, an adjustment of rollers with the use of spacers or the use, preferably, of position-controlled hydraulic cylinders is necessary in order to prevent a strand reduction with smooth rollers at a wrong location.
  • U.S. Pat. No. 3,628,594 discloses a device for reduction of a cross-section of a strand and which includes a pair of rollers driven in a horizontal plane and pairs of rollers driven in a vertical plane on opposite sides of the strand.
  • the roller pairs, between which a strand is displaced, are adjusted relative to each other with hydraulic piston/cylinder units and serve for reducing vertical and horizontal cross-sectional dimensions of the cast strand.
  • German application 10144234.3 discloses a method of and a device for optimization of quality of cast strands with round or substantially round cross-sections in the region of soft-reduction.
  • the cast strand beneath the mold, is deformed, in the region of residual solidification, at least in one reduction plane with adjustable rollers in order to improve the inner quality.
  • the round or approximately round cast cross-section is deformed in the region of the residual solidification with two-sided adjustable rollers, which are offset by 90° relative to the reduction plane, by an amount between 5% and 60% of the main reduction in order to increase the inner quality and the core densification.
  • additional two-sided adjustable rollers which are offset by 90° relative to the reduction plane, in order to prevent structural cracks or an uncontrolled deformation of the strand.
  • Japanese Publication JP 12 37 062 disclose prevention of inner cracks in a cast strand during straight bending, even at high cast speeds, by providing the strand with a reverse trapezoidal shape.
  • the strand is formed in a mold the inner wall surfaces of which have trapezoidal shape, with the width on the inner side of the bend being greater than the width on the outer side of the bend in order to obtain a reverse trapezoidal shape.
  • This method permits to reduce the tension stress in the first region of the upper side of the cast strand and, thereby, the cast speed can be increased.
  • Japanese publication JP 63 21 5353 discloses a method that permits to facilitate treatment of a cast strand by conducting the casting process with a water-cooled mold having a round or polygonal shape.
  • the strand casting machine is followed by groups of rollers for a stepwise rolled reduction and which effect the predetermined reduction alternatively vertically and horizontally. Because the continuously cast material, which has a round or polygonal shape, is reduced by rollers before solidification in the central region, segregation or cavitation are prevented.
  • the strand is cut to predetermined lengths to obtain separate cast workpieces.
  • the treatment becomes easy, the formation of voids and of a central segregation is prevented, and the structural quality is noticeably improved.
  • Japanese Publication JP 12 02 342 proposes in order to reduce tension stresses in the solidified region of a cast strand and to improve the formation of strand of melting steel, to form notches in a portion of the upper side of the strand and to form the notch region during the continuous casting process.
  • Upon vertical extraction of the strand out of the mold it is, firstly, bent in an arcuate shape and then is guided to a horizontal break-down region.
  • the strand is guided in the horizontal break-down region with upper and lower squeegee rollers in order to stretch it into a horizontal shape. After a complete solidification in the region of the lowest point of the liquid pool, the strand is cut with a cutting burner on the outer side of the horizontally stretched region.
  • This method permits to reduce tension stresses in the solidified region of the boundary region on the outer side of the stretched region, which enables to conduct a continuous casting process at increased casting speeds. In addition, structural cracks are prevented, and the productivity is increased.
  • Japanese Publication JP 21 42 654 discloses production of round cast strands without formation of cracks by breaking down the cast strand with break-down rollers and pulling the strand with rotatable pinch rollers after solidification. With this method, the bending stresses appear only in a non-solidified region of the strand, which reduces formation of inner cracks.
  • the object of the invention is to provide a method of and a casting machine for formation of billets and ingots, with which the casting radius is not determined by the soft-reduction but is selected in particular based on casting technological and qualitative grounds and economical considerations.
  • the object is achieved by a method of producing cast strands in shape of billets or ingots wherein the strand is guided between pairs of rollers, and in which according to the invention in a straightening region, the strands are formed with one or several projections or recesses by using profiled rollers, and downstream of the straightening region, in a casting direction, the strands are subjected to a soft-reduction with at least one roller pair with smooth rollers.
  • the roller pair is advanced toward and away according to a position of the lowest point of the liquid pool.
  • the soft reduction is effected preferably with a single roller pair.
  • the position of the liquid pool lowest point is determined with an aid of calculation models and/or by measurement technique, e.g., by measuring a position or force, with the roller pair being correspondingly adjusted.
  • the projections or recesses of the strand cross-sections are provided on all four sides.
  • the projection height constitutes maximum 8% of thickness of a reduceable strand
  • the projection height on each side constitutes maximum 6%
  • the projection height on each side constitutes maximum 4%.
  • a width of a profile constitutes from 30 to 80% of a width of a corresponding side.
  • a casting machine for producing cast strands in shape of billets or ingots with formation of one-sided or multiple sides projections is characterized according to the invention in that profiled roller pairs are associated with a straightening region, and at least one roller pair with smooth rollers is associated with a region of the soft reduction.
  • FIG. 1 a casting machine with a mold and an adjoining strand guide
  • FIGS. 2 a , 2 b , 2 c strand cross-sections C, D, E with one or several projections according to the invention
  • FIGS. 3 a , 3 b , 3 c strand cross-sections F, G, H with one or several recesses according to the invention
  • FIG. 4 a a profile roller for forming the projections
  • FIG. 4 b a profile roller for forming the recesses.
  • FIG. 1 shows a casting machine with a mold 1 to which a steel melt 10 is fed, and formation of a cast strand 2 beneath the mold.
  • the strand 2 passes through a deflection section with a cast radius R from a vertical cast direction to a horizontal direction 13 with a tangent point 3 .
  • the tangent point 3 is located approximately in the center of a straightening region A with straightening rollers 4 , 5 , 6 and which is adjoined by a soft-reduction region B.
  • soft reduction region B soft reduction takes place which is effected with pairs 7 , 8 , 9 of smooth rollers.
  • the position of the lowest point of the liquid pool in the soft-reduction region B is determined with the aid of a computation model or measurement technique, e.g., by measuring the position or forces, with the roller pairs 7 - 9 being correspondingly adjusted.
  • the soft reduction is so effected by controlling the strand cooling or the cast speed that it starts at the straightening region with the liquid pool lowest point and ends at the end of the soft-reduction region B.
  • FIGS. 2 a through 2 c show formation of the strand cross-sections according to the invention with one or several projections (h, b) which results in formation of the cross-sectional shapes C, D, E.
  • FIGS. 3 a through 3 b show strand sections according to the invention which are formed with recesses ( ⁇ h, b) and which have cross-sectional shapes F, b, H. On the opposite side, respective recesses are designated with ⁇ h (or ⁇ h 1 ).
  • Respective profiles are produced with correspondingly profiled straightening rollers 4 - 6 having a shape 11 according to FIG. 4 a for forming projections, and having a shape 12 for forming recesses.
  • the measures according to the invention permit to obtain a smaller cast radius which, in turn, permits to noticeably reduce the height of the machines, the shop height, and casts of the base.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Metal Rolling (AREA)
  • Multi-Process Working Machines And Systems (AREA)
US10/494,590 2001-11-06 2002-11-04 Method and casting machine for production of casting bars in the shape of billets or blocks Abandoned US20050067135A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US11/807,141 US20080041554A1 (en) 2001-11-06 2007-05-24 Method and casting machine for production of casting bars in the shape of billets or blocks
US12/383,234 US20090178777A1 (en) 2001-11-06 2009-03-19 Casting machine for production of casting bars in the shape of billets or blocks

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10153960A DE10153960A1 (de) 2001-11-06 2001-11-06 Verfahren und Gießmaschine zum Stranggießen von Knüppel- und Blockformaten oder dergleichen
DE10153960.6 2001-11-06
PCT/EP2002/012263 WO2003039789A2 (fr) 2001-11-06 2002-11-04 Procede et machine de coulee permettant de fabriquer des barres de coulee sous forme de blocs ou de billettes

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US11/807,141 Continuation-In-Part US20080041554A1 (en) 2001-11-06 2007-05-24 Method and casting machine for production of casting bars in the shape of billets or blocks

Publications (1)

Publication Number Publication Date
US20050067135A1 true US20050067135A1 (en) 2005-03-31

Family

ID=7704458

Family Applications (3)

Application Number Title Priority Date Filing Date
US10/494,590 Abandoned US20050067135A1 (en) 2001-11-06 2002-11-04 Method and casting machine for production of casting bars in the shape of billets or blocks
US11/807,141 Abandoned US20080041554A1 (en) 2001-11-06 2007-05-24 Method and casting machine for production of casting bars in the shape of billets or blocks
US12/383,234 Abandoned US20090178777A1 (en) 2001-11-06 2009-03-19 Casting machine for production of casting bars in the shape of billets or blocks

Family Applications After (2)

Application Number Title Priority Date Filing Date
US11/807,141 Abandoned US20080041554A1 (en) 2001-11-06 2007-05-24 Method and casting machine for production of casting bars in the shape of billets or blocks
US12/383,234 Abandoned US20090178777A1 (en) 2001-11-06 2009-03-19 Casting machine for production of casting bars in the shape of billets or blocks

Country Status (6)

Country Link
US (3) US20050067135A1 (fr)
EP (1) EP1441871B1 (fr)
AT (1) ATE359887T1 (fr)
AU (1) AU2002350668A1 (fr)
DE (2) DE10153960A1 (fr)
WO (1) WO2003039789A2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113118397A (zh) * 2021-03-15 2021-07-16 上海二十冶建设有限公司 一种立式连铸机轻压模块的整体式底座及其调整方法

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010007659B4 (de) 2010-01-12 2019-05-09 Sms Group Gmbh Stranggießmaschine mit einem Kaltstrang
CN114054700B (zh) * 2021-10-15 2022-11-15 东北大学 圆坯的压下方法及装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3478809A (en) * 1964-07-03 1969-11-18 Bruno Tarmann Process of producing continuous castings of square or circular cross-section
US3606785A (en) * 1967-08-12 1971-09-21 Olsson Ag Erik Apparatus and method for eliminating or reducing the internal flaws of semifinished products,especially at cast ingots,blocks,blooms,slabs,billets or the like
US3650314A (en) * 1969-11-19 1972-03-21 Bohler & Co Ag Fa Geb Apparatus for manufacturing stretch-formed products of high-melting metals
US4519439A (en) * 1977-07-26 1985-05-28 Jernjontoret Method of preventing formation of segregations during continuous casting
US5348074A (en) * 1991-11-26 1994-09-20 Sms Schloemann-Siemag Aktiengesellshaft Process and a device for continuous casting of slabs or ingots

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2537356A (en) * 1942-11-28 1951-01-09 See Fabriks Aktiebolag Rolling mill for the production of conical tubes
US3837391A (en) * 1971-02-01 1974-09-24 I Rossi Continuous casting apparatus

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3478809A (en) * 1964-07-03 1969-11-18 Bruno Tarmann Process of producing continuous castings of square or circular cross-section
US3606785A (en) * 1967-08-12 1971-09-21 Olsson Ag Erik Apparatus and method for eliminating or reducing the internal flaws of semifinished products,especially at cast ingots,blocks,blooms,slabs,billets or the like
US3650314A (en) * 1969-11-19 1972-03-21 Bohler & Co Ag Fa Geb Apparatus for manufacturing stretch-formed products of high-melting metals
US4519439A (en) * 1977-07-26 1985-05-28 Jernjontoret Method of preventing formation of segregations during continuous casting
US5348074A (en) * 1991-11-26 1994-09-20 Sms Schloemann-Siemag Aktiengesellshaft Process and a device for continuous casting of slabs or ingots

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113118397A (zh) * 2021-03-15 2021-07-16 上海二十冶建设有限公司 一种立式连铸机轻压模块的整体式底座及其调整方法

Also Published As

Publication number Publication date
EP1441871B1 (fr) 2007-04-18
ATE359887T1 (de) 2007-05-15
US20080041554A1 (en) 2008-02-21
WO2003039789A3 (fr) 2003-12-24
WO2003039789A2 (fr) 2003-05-15
EP1441871A2 (fr) 2004-08-04
DE10153960A1 (de) 2003-05-22
DE50209992D1 (de) 2007-05-31
US20090178777A1 (en) 2009-07-16
AU2002350668A1 (en) 2003-05-19

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Legal Events

Date Code Title Description
AS Assignment

Owner name: SMS DEMAG AKTIENGESELLSCHAFT, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:STREUBEL, HANS;REEL/FRAME:016065/0401

Effective date: 20040422

STCB Information on status: application discontinuation

Free format text: ABANDONED -- AFTER EXAMINER'S ANSWER OR BOARD OF APPEALS DECISION

AS Assignment

Owner name: SMS SIEMAG AKTIENGESELLSCHAFT, GERMANY

Free format text: CHANGE OF NAME;ASSIGNOR:SMS DEMAG AKTIENGESELLSCHAFT;REEL/FRAME:022816/0807

Effective date: 20090325

Owner name: SMS SIEMAG AKTIENGESELLSCHAFT,GERMANY

Free format text: CHANGE OF NAME;ASSIGNOR:SMS DEMAG AKTIENGESELLSCHAFT;REEL/FRAME:022816/0807

Effective date: 20090325