EP3167974A1 - Section de secteur de machine de coulée continue pour pressage profond de queue de solidification d'ébauche de coulée continue et procédé de pressage profond pour queue de solidification d'ébauche de coulée continue - Google Patents

Section de secteur de machine de coulée continue pour pressage profond de queue de solidification d'ébauche de coulée continue et procédé de pressage profond pour queue de solidification d'ébauche de coulée continue Download PDF

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Publication number
EP3167974A1
EP3167974A1 EP14897138.5A EP14897138A EP3167974A1 EP 3167974 A1 EP3167974 A1 EP 3167974A1 EP 14897138 A EP14897138 A EP 14897138A EP 3167974 A1 EP3167974 A1 EP 3167974A1
Authority
EP
European Patent Office
Prior art keywords
cast slab
reduction
driven roller
continuous casting
roller set
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.)
Granted
Application number
EP14897138.5A
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German (de)
English (en)
Other versions
EP3167974A4 (fr
EP3167974B8 (fr
EP3167974B1 (fr
Inventor
Yonglin Kang
Xinhua Wang
Guoming Zhu
Han Ma
Jianchao MA
Jinbo QU
Hang YU
Zhijun Zhang
Min Jiang
Zhigang Xu
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.)
University of Science and Technology Beijing USTB
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University of Science and Technology Beijing USTB
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Publication of EP3167974A1 publication Critical patent/EP3167974A1/fr
Publication of EP3167974A4 publication Critical patent/EP3167974A4/fr
Application granted granted Critical
Publication of EP3167974B1 publication Critical patent/EP3167974B1/fr
Publication of EP3167974B8 publication Critical patent/EP3167974B8/fr
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    • 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
    • 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
    • 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
    • B22D11/1284—Horizontal removing
    • 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
    • B22D11/1287—Rolls; Lubricating, cooling or heating rolls while in use

Definitions

  • the present invention relates to the technical field of slab casting, in particular to a sector-shaped section of a continuous casting machine for heavy reduction of a solidified terminal of a continuously cast slab and a heavy reduction method thereof.
  • the technology for heavy reduction of the solidified terminal of the continuously cast slabs refers to a process of arranging screw-down rollers at a solidified terminal of a continuously cast slab on a continuous casting line, applying heavy-reduction deformation (5-20mm to the cast slab when the solid phase rate of the center of the cast slab exceeds 80%, and then performing normal rolling production.
  • the technology can obviously improve the center quality (improve macro-structure, shrink holes, looseness, segregation, etc.) of the continuously cast slabs, and can produce quality extra-thick products with a thickness of over 100mm at a relatively low compression ratio (1.5-2.5).
  • the contact area obviously increases while 5-7 pairs of casting rollers of the sector-shaped section contact the slab at the same time, followed by the obvious increase in the load, so the strength and rigidity of the sector-shaped section must be greatly enhanced to resist the large load on and large elastic deformation of the sector-shaped section and the segmented roller (or casting roller).
  • the segmented roller is comprised of a roll collar, a core shaft and a middle support bearing base, which greatly increases the dimension and weight of the sector-shaped section, thus causing a series of new problems to the lifting, assembling and maintenance of the sector-shaped section.
  • the heavy reduction is carried out near the solidified terminal of the continuously cast slab, and the deformation (strain) generated when the multiple pairs of roller of the heavy reduction sector-shaped section perform small-deformation reduction is of poor permeability, and the strain transmitted to the center area of the continuously casting slab is small, which cannot better help improve the looseness and segregation defects of the center area.
  • the technical problem to be solved by the present invention is to provide a continuous casting machine for heavy reduction of a solidified terminal of a continuously cast slab and a heavy reduction method thereof, to overcome defects in the prior art including seriously insufficient strength and rigidity of the sector-shaped section and driving rollers of the continuous casting machine, insufficient bearing capability of the clamping cylinders, difficulties in implementation of the heavy reduction on the solidified terminal, and trend of cracking in the middle of the cast slab when the sector-shaped section of the existing continuous casting machine is employed to perform heavy reduction on the solidified terminal.
  • an embodiment of the present invention provides a sector-shaped section of a continuous casting machine for heavy reduction of a solidified terminal of a continuously cast slab, comprising an upper frame, a lower frame, an upper driving roller, a lower driving roller, a left driven roller set, a right driven roller set, a screw-down gear and clamping cylinders which are positioned on the sector-shaped section of the continuous casting machine.
  • the clamping cylinders are used for clamping the upper frame and the lower frame and keeping the upper frame and the lower frame at a set interval.
  • the upper driving roller is connected with the screw-down gear.
  • the upper driving roller is connected to the upper frame through an upper bearing base.
  • the lower driving roller is connected to the lower frame through a lower bearing base.
  • the left driven roller set and the right driven roller set are respectively positioned on two sides of the driving rollers.
  • the left driven roller set is used for clamping the cast slab before reduction.
  • the right driven roller set is used for clamping the cast slab after reduction.
  • the diameter ratio of the driving rollers to the driven rollers is 1.1:1-2:1.
  • the opening degrees of the right driven roller set and the driving rollers are identical with the thickness of the cast slab after reduction.
  • the opening degree of the left driven roller set is identical with the thickness of the cast slab before reduction.
  • the driving rollers are integrated and manufactured through an integral forming process.
  • the present invention also provides a method for heavy reduction of a solidified terminal of a continuously cast slab, characterized by comprising the following steps:
  • the present invention adopts large-diameter integrated driving rollers, the upper frame and the lower frame which have high strength and high rigidity, and clamping cylinders with high bearing capabilities; during implementation of the heavy reduction, the total deformation is the deformation generated when the large-diameter driving rollers perform heavy reduction on the continuously cast slab, not the total deformation usually generated when the heavy reduction is gradually completed by 5-7 pairs of casting rollers of the sector-shaped section one by one.
  • Screw-down gear 2: Upper frame; 3: Upper driving roller; 4: Upper bearing base; 5: Lower driving roller; 6: Lower bearing base; 7: Lower frame; 8: Left driven roller set; 9: Right driven roller set; 10: Clamping cylinder; 11: Transmission device.
  • the present invention provides a sector-shaped section of a continuous casting machine for heavy reduction of a solidified terminal of a continuously cast slab and a heavy reduction method thereof to solve problems in the prior art including seriously insufficient strength and rigidity of the sector-shaped section and driving rollers of the continuous casting machine, insufficient bearing capability of the clamping cylinders, difficulties in implementation of the heavy reduction on the solidified terminal, the trend of cracking in the middle of the cast slab when the soft reduction system of the existing continuous casting machine is employed to perform heavy reduction on the solidified terminal of the sector-shaped section.
  • an embodiment of the present invention provides a sector-shaped section of a continuous casting machine for heavy reduction of a solidified terminal of a continuously cast slab, including an upper frame 2, a lower frame 7, an upper driving roller 3, a lower driving roller 5, a left driven roller set, 8, a right driven roller set 9, a screw-down gear 1 and clamping cylinders 10 which are positioned on the sector-shaped section of the continuous casting machine.
  • the clamping cylinders 10 are used for clamping the upper frame 2 and the lower frame 7 and keeping the upper frame 2 and the lower frame 7 at a set interval.
  • the driving rollers and the driven rollers are driven to rotate by a transmission device 11, thus driving the cast slab to move forward.
  • the upper driving roller 3 is connected with the screw-down gear 1.
  • the upper driving roller 3 is connected to the upper frame 2 through an upper bearing base 4.
  • the lower driving roller 5 is connected to the lower frame 7 through a lower bearing base 6.
  • the left driven roller set 8 and the right driven roller set 9 are respectively positioned on two sides of the driving rollers.
  • the left driven roller set 8 is used for clamping the cast slab before reduction.
  • the right driven roller set 9 is used for clamping the cast slab after reduction.
  • the diameter ratio of the driving rollers to the driven rollers is 1.1:1-2:1.
  • the opening degrees of the right driven roller set 9 and the driving rollers are identical with the thickness of the cast slab after reduction.
  • the opening degree of the left driven roller set 8 is identical with the thickness of the cast slab before reduction.
  • the driving rollers are integrated and manufactured through an integral forming process.
  • the present invention also provides a method for heavy reduction of a solidified terminal of a continuously cast slab, including the following steps:
  • the driving rollers of the present invention are large-diameter integrated driving rollers (namely, not segmented rollers assembled by roll collars, core shafts and middle support bearing bases). Meanwhile, considering the increase in loads when the heavy reduction is implemented, the strength and rigidity of the upper frame 2 and the lower frame 7 of the sector-shaped section are enhanced (by 2-5 times), and the bearing capabilities of the four clamping cylinders 10 are correspondingly enhanced (by 2-5 times).
  • the present invention adopts large-diameter integrated driving rollers, the upper frame and the lower frame which have high strength and high rigidity, and clamping cylinders with high bearing capabilities; during implementation of the heavy reduction, the total deformation is the deformation generated when the large-diameter driving rollers perform heavy reduction on the continuously cast slab, not the total deformation usually generated when the heavy reduction is gradually completed by 5-7 pairs of casting rollers of the sector-shaped section one by one.
EP14897138.5A 2014-07-09 2014-09-25 Machine de coulée continue à segments pour réduction forte et procédé correspondant Active EP3167974B8 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201410325414.1A CN104057049B (zh) 2014-07-09 2014-07-09 连铸坯凝固末端大压下的连铸机扇形段及其大压下方法
PCT/CN2014/087369 WO2016004682A1 (fr) 2014-07-09 2014-09-25 Section de secteur de machine de coulée continue pour pressage profond de queue de solidification d'ébauche de coulée continue et procédé de pressage profond pour queue de solidification d'ébauche de coulée continue

Publications (4)

Publication Number Publication Date
EP3167974A1 true EP3167974A1 (fr) 2017-05-17
EP3167974A4 EP3167974A4 (fr) 2018-04-25
EP3167974B1 EP3167974B1 (fr) 2020-01-22
EP3167974B8 EP3167974B8 (fr) 2020-04-08

Family

ID=51545144

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14897138.5A Active EP3167974B8 (fr) 2014-07-09 2014-09-25 Machine de coulée continue à segments pour réduction forte et procédé correspondant

Country Status (6)

Country Link
US (1) US20170113266A1 (fr)
EP (1) EP3167974B8 (fr)
JP (1) JP6541043B2 (fr)
KR (1) KR20170021872A (fr)
CN (1) CN104057049B (fr)
WO (1) WO2016004682A1 (fr)

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CN105689664B (zh) * 2014-11-27 2017-11-28 宝钢工程技术集团有限公司 用于改善板坯疏松缩孔缺陷的重压下扇形段及其使用方法
CN106141127A (zh) * 2015-04-17 2016-11-23 宝钢工程技术集团有限公司 重压下连铸生产方法
CN104858383A (zh) * 2015-06-10 2015-08-26 中冶连铸技术工程有限责任公司 一种用于板坯重压下的扇形段
CN106552912A (zh) * 2016-11-28 2017-04-05 东北大学 一种连铸凝固末端重压下用增强型紧凑扇形段
CN106623834B (zh) * 2016-12-22 2019-04-05 中冶京诚工程技术有限公司 连铸板坯重压下的扇形段装置
CN109926554A (zh) * 2017-12-19 2019-06-25 宝钢工程技术集团有限公司 一种改善与消除板坯内部疏松的扇形段及其使用方法
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CN110227806A (zh) * 2019-05-27 2019-09-13 北京首钢国际工程技术有限公司 一种铸轧式连铸机凝固末端大压下装置
CN113843400A (zh) 2020-06-25 2021-12-28 宝山钢铁股份有限公司 一种提升铸坯质量的板坯冷却与压下方法
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CN116422852B (zh) * 2023-06-12 2023-11-17 中国重型机械研究院股份公司 一种特厚板连铸七辊大压下扇形段控制模型

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Also Published As

Publication number Publication date
CN104057049B (zh) 2016-06-15
US20170113266A1 (en) 2017-04-27
WO2016004682A1 (fr) 2016-01-14
CN104057049A (zh) 2014-09-24
EP3167974A4 (fr) 2018-04-25
JP2017532202A (ja) 2017-11-02
EP3167974B8 (fr) 2020-04-08
KR20170021872A (ko) 2017-02-28
JP6541043B2 (ja) 2019-07-10
EP3167974B1 (fr) 2020-01-22

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