EP4282556A1 - Zentriereinheit zur zentrierung eines metalliscen strangs - Google Patents

Zentriereinheit zur zentrierung eines metalliscen strangs Download PDF

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Publication number
EP4282556A1
EP4282556A1 EP23172608.4A EP23172608A EP4282556A1 EP 4282556 A1 EP4282556 A1 EP 4282556A1 EP 23172608 A EP23172608 A EP 23172608A EP 4282556 A1 EP4282556 A1 EP 4282556A1
Authority
EP
European Patent Office
Prior art keywords
strand
centering unit
unit according
strand guide
joint
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.)
Pending
Application number
EP23172608.4A
Other languages
German (de)
English (en)
French (fr)
Inventor
Ronald Mayrhofer
Reinhard Simon
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.)
Primetals Technologies Austria GmbH
Original Assignee
Primetals Technologies Austria 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 Primetals Technologies Austria GmbH filed Critical Primetals Technologies Austria GmbH
Publication of EP4282556A1 publication Critical patent/EP4282556A1/de
Pending 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
    • B22D11/128—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
    • 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
    • B22D11/08—Accessories for starting the casting procedure
    • 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
    • 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
    • B22D11/16—Controlling or regulating processes or operations
    • 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
    • B22D11/16—Controlling or regulating processes or operations
    • B22D11/20—Controlling or regulating processes or operations for removing cast stock
    • 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
    • B22D11/16—Controlling or regulating processes or operations
    • B22D11/20—Controlling or regulating processes or operations for removing cast stock
    • B22D11/208—Controlling or regulating processes or operations for removing cast stock for aligning the guide rolls

Definitions

  • the present invention relates to the technical. Field of continuous casting in which a metallic strand, e.g. made of a steel or aluminum material, is cast into a strand in a continuous casting plant. During continuous casting, molten metal is poured into a mold to form a partially solidified strand, which is typically continuously pulled out of the mold. The strand is supported, guided and further cooled in the strand guide following the mold.
  • a metallic strand e.g. made of a steel or aluminum material
  • the invention relates to a centering unit for centering a metallic strand, preferably with a billet or billet cross-section, in a strand guide of a continuous casting machine.
  • the strand is guided centrally through the strand guide by the at least one centering unit.
  • the strand can be as in Fig 1 represented by laterally arranged plates held on a central path. It is also common to use the strand as in Fig 2 represented by strand guide rollers arranged laterally fixed in the width direction of the strand.
  • the object of the invention is to improve an existing centering unit, in particular for a billet or billet continuous casting system, so that the above-mentioned requirements are achieved.
  • strands with varying strand widths should also be centered automatically; the centering unit should center the strand exactly with an accuracy of 1 to 2 mm; the centering unit should be space-saving so that it can be installed at different locations in the curved strand guide or in the horizontal outlet area of the continuous casting system; the centering unit should be heat, dirt and water resistant; the centering unit should be inexpensive; and finally, the centering unit should be easy to automate.
  • the centering unit is supported by a console, which is preferably designed as a welded sheet metal construction.
  • the console has at least two first joints, preferably on the left and right below the strand, with an adjusting lever - preferably C-shaped - connected to each first joint.
  • the adjusting levers each point at least two joints, namely a second and a third joint.
  • a roll holder is connected to the second joint of an adjusting lever, which rotatably supports at least one strand guide roll.
  • a tie rod is connected to the third joint of the adjusting lever, which connects the adjusting lever and a sliding block to one another in an articulated manner.
  • a hydraulic cylinder with a piston rod which is arranged either between the strand and the slide block or vertically below the slide block, can displace the slide block in the vertical direction.
  • the first ends of the tie rods are also moved, which leads to a rotation of the adjusting levers around the first joints.
  • the first ends of the two tie rods are each articulated to the sliding block.
  • the reel holders are moved either towards the strand or away from the strand.
  • the second joints between the adjusting levers and the roller holders ensure that the running surfaces of the strand guide rollers always rest on the side surfaces of the strand, even if the strand has different widths.
  • strands of different widths can be precisely centered in the strand guide using a single hydraulic cylinder.
  • the centering unit with the console saves space and can be installed at different points in the strand guide. Since there is only one actuator - namely the hydraulic cylinder - the potentially complex synchronization between the left and right side guide of the strand is eliminated.
  • the centering unit can therefore be automated very easily by controlling or regulating the position of the hydraulic cylinder.
  • the console, the adjusting levers, the reel holders with the strand guide rollers, the pull rods, the vertically movable sliding block and the hydraulic cylinder are robust elements that are well protected against heat, dirt and water.
  • the strand guide rollers, the roller holders, the adjusting levers, the tie rods and the sliding block are arranged symmetrically to a vertical plane of symmetry that passes centrally through the middle of the strand.
  • the adjusting lever arranged on the left side of the strand is designed symmetrically to the adjusting lever arranged on the right side.
  • a strand guide roller is mounted several times on the roller holder. As a result, the strand guiding forces of a strand guiding roll are introduced into the roll holder and further into the centering unit via several bearing points.
  • the console can be designed cost-effectively as a welded sheet metal construction.
  • the hydraulic cylinder can be a single-acting or double-acting hydraulic cylinder, which is preferably attached to the console.
  • Single-acting hydraulic cylinders are also known as plungers.
  • the sliding block is designed to be displaceable by two sliding rails on the console, with at least one sliding strip preferably being arranged between a sliding rail and the sliding block.
  • the slide rail is typically made of the same material (usually steel) as the console;
  • the sliding strip can preferably be made of a “self-lubricating” material such as bronze, gray cast iron or plastic.
  • a first end of the tie rod is articulated to the sliding block by a fourth joint. It can also be advantageous if the piston rod is connected to the sliding block in an articulated manner by a fifth joint.
  • a, preferably water-cooled, heat protection panel is arranged in the vertical direction between the strand and the hydraulic cylinder.
  • the hydraulic cylinder is relatively heat-resistant due to the hydraulic medium, it is advantageous to shield a position measuring system of the hydraulic cylinder from heat by the heat protection panel.
  • the bearing of the strand guide rollers is water-cooled and preferably the lateral surfaces of the strand guide rollers are also water-cooled. This prevents the strand guide rollers from overheating.
  • the hydraulic cylinder In order to enable position control or regulation of the centering unit, it is advantageous for the hydraulic cylinder to have a position measuring device.
  • the hydraulic cylinder In order to enable force control or regulation of the centering unit, it is advantageous for the hydraulic cylinder to have a force measuring device for measuring the force F.
  • the contact pressure of the strand guide rollers on the strand can be easily limited by supplying the hydraulic cylinder with a pressure medium from a hydraulic supply, whereby the contact pressure of a strand guide roller on the strand can be limited via a pressure limitation or adjusted via a pressure setting of the pressure medium.
  • a flexible control or regulation of the contact force and/or the position of the strand guide rollers can be carried out by a control or regulating device, in which the contact force of a strand guide roller on the strand is set as a function of the (measured) force F and/or a position of the piston rod is adjusted depending on the (measured) position s.
  • a control or regulating device in which the contact force of a strand guide roller on the strand is set as a function of the (measured) force F and/or a position of the piston rod is adjusted depending on the (measured) position s.
  • the first case it is a position control or regulation; in the second case it involves force control or regulation.
  • the Fig 1 shows a strand guide of a continuous casting system according to the prior art with two laterally arranged fixed plates 20.
  • the strand not shown, is guided by each several strand guide rollers 7 are supported and guided above and below the strand. Any eccentric position of the strand is limited by the plates 20.
  • Fig 2 Another strand guide for a billet or billet continuous casting system is shown according to the prior art.
  • the strand S is centered by two fixedly arranged strand guide rollers 25, that is to say they cannot be moved in the width direction of the strand S.
  • the fixed strand guide rollers 25 can be rotatably mounted or not.
  • the disadvantage of these solutions is that the plates 20 or the strand guide rollers 25 are fixed and strands of different widths can either not be centered at all or can only be centered to a limited extent.
  • the continuous casting system must be shut down in order to manually set up the plates 20 or the strand guide rollers 25.
  • the Fig 3a and 3b each show an elevation of a centering unit according to the invention for centering a wide ( Fig 3a ) and a narrow strand S ( Fig 3b ).
  • a sliding block 10 is displaced vertically.
  • the hydraulic cylinder 8 is connected in an articulated manner to the console 1 and to the sliding block via the fifth joint 15.
  • Two tie rods 11 are attached to the sliding block 10 via two fourth joints 14, which transmit the vertical displacement of the sliding block 10 to the adjusting levers 3 via third joints 5.
  • the adjusting levers 3 are connected to the console 1 via first joints 2.
  • the roll holders 6 either move away from each other or towards each other.
  • a roll holder 6 is connected to the adjusting lever 3 via a second joint 4.
  • One or more strand guide rollers 7 are rotatably mounted on each roll holder 6.
  • the hydraulic cylinder 8 can be used to center strands S of different widths.
  • the two strand guide rollers 7 are synchronously positioned on the strand or moved away from it. The synchronization takes place mechanically, without the need for regulation on both sides.
  • FIGs 4 and 5 A floor plan and a cross plan of the centering unit according to the invention are shown. It can be seen from both views that the centering unit is very space-saving and can therefore be installed at different locations in the strand guide.
  • the Fig 6 shows a perspective view of the centering unit Fig 3a , ie to center the opposite the Fig 3b wider strand S.
  • the Fig 7 finally shows schematically a cooling circuit for cooling the heat protection panel 16 and the two strand guide rollers 7, the heat protection panel being arranged in the vertical direction between the strand guide rollers 7 and the top of the hydraulic cylinder 8 is.
  • a cooling medium here cooling water
  • the cooling medium is supplied to the strand guide rollers 7 and the heat protection panel 16 via the two water inlets A1, A2. After cooling, the cooling medium is discharged via the two water outlets B1, B2.
  • the water pump and other additional units such as filters, coolers, etc. are not shown.
  • the flow directions of the cooling medium are indicated by arrows.
  • the centering unit according to the invention is not limited to polygonal strands, but can also center round or elliptical strands S (see image d) or beam blanks, see image e).
  • the Fig 9 shows the centering unit Fig 6 with a heat protection panel 16.
  • the Figs 10a and 10b show the sliding block 10 and the vertically displaceable guide of the sliding block in an elevation and a sectional view along the line AA.
  • the sliding block 10 is guided by two slide rails 12, which are here part of the console made of a steel material.
  • two first slide strips 13a are connected to the slide block 10 and two second slide strips 13b are connected to the slide rails.
  • the slide rails can be made of metal or a plastic, for example. It is not necessary that the slide rails extend the entire length of the slide block. It is also conceivable that the slide rails are segmented with a first segment in the lower region and a second segment in the upper region of the sliding block 10.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
EP23172608.4A 2022-05-25 2023-05-10 Zentriereinheit zur zentrierung eines metalliscen strangs Pending EP4282556A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ATA50368/2022A AT525909B1 (de) 2022-05-25 2022-05-25 Zentriereinheit zur Zentrierung eines metallischen Strangs

Publications (1)

Publication Number Publication Date
EP4282556A1 true EP4282556A1 (de) 2023-11-29

Family

ID=86331219

Family Applications (1)

Application Number Title Priority Date Filing Date
EP23172608.4A Pending EP4282556A1 (de) 2022-05-25 2023-05-10 Zentriereinheit zur zentrierung eines metalliscen strangs

Country Status (3)

Country Link
EP (1) EP4282556A1 (zh)
CN (1) CN117123745A (zh)
AT (1) AT525909B1 (zh)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3448908A (en) * 1965-12-20 1969-06-10 Biprohut Feed mechanism for an ingot produced by continuous casting,especially of steel
KR20010028812A (ko) * 1999-09-27 2001-04-06 이구택 주형 삽입용 더미바의 가이드장치
CN205110723U (zh) * 2015-10-30 2016-03-30 武汉钢铁(集团)公司 新型铸坯纠偏装置

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012055971A (ja) * 2010-08-10 2012-03-22 Sumitomo Heavy Industries Techno-Fort Co Ltd 連続鋳造設備
CN202447622U (zh) * 2011-12-20 2012-09-26 鞍钢股份有限公司 连铸坯输送辊道对中装置
CN209006638U (zh) * 2018-09-05 2019-06-21 中冶连铸技术工程有限责任公司 方坯导向段的自动对中侧导向装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3448908A (en) * 1965-12-20 1969-06-10 Biprohut Feed mechanism for an ingot produced by continuous casting,especially of steel
KR20010028812A (ko) * 1999-09-27 2001-04-06 이구택 주형 삽입용 더미바의 가이드장치
CN205110723U (zh) * 2015-10-30 2016-03-30 武汉钢铁(集团)公司 新型铸坯纠偏装置

Also Published As

Publication number Publication date
AT525909A4 (de) 2023-09-15
CN117123745A (zh) 2023-11-28
AT525909B1 (de) 2023-09-15

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