KR100721922B1 - Foot roll mounting structure of continuous casting machine - Google Patents

Foot roll mounting structure of continuous casting machine Download PDF

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Publication number
KR100721922B1
KR100721922B1 KR1020050099310A KR20050099310A KR100721922B1 KR 100721922 B1 KR100721922 B1 KR 100721922B1 KR 1020050099310 A KR1020050099310 A KR 1020050099310A KR 20050099310 A KR20050099310 A KR 20050099310A KR 100721922 B1 KR100721922 B1 KR 100721922B1
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South Korea
Prior art keywords
mold
segment
top zone
foot roll
continuous casting
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KR1020050099310A
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Korean (ko)
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KR20070043256A (en
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조기현
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주식회사 포스코
재단법인 포항산업과학연구원
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Priority to KR1020050099310A priority Critical patent/KR100721922B1/en
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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
    • B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
    • B22D11/041—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds for vertical casting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C1/00—Manufacture of metal sheets, metal wire, metal rods, metal tubes by drawing
    • 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
    • B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
    • B22D11/053—Means for oscillating the moulds
    • 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
    • B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
    • B22D11/055—Cooling the moulds
    • 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

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)

Abstract

본 발명은 연속주조기의 풋롤 설치구조에 관한 것으로, 용강이 수용되는 턴디쉬와, 상기 턴디쉬의 하부에 설치되고 침지노즐에 의해 용강을 수납하여 주편으로 주조하는 주형과, 상기 주형을 진동시키는 유압실린더와, 상기 주형 하부에 그와 간격을 두고 다수 설치되어 주편을 냉각하고 인발하는 다수의 롤을 갖는 세그먼트를 포함하는 연속주조기에 있어서; 상기 세그먼트중 주형과 최근접된 탑존세그먼트의 최상단에 주편측으로 연장형성된 고정브라켓과; 상기 고정브라켓에 의해 회전가능하게 지지되며 탑존세그먼트에 장착되는 탑존롤들과 동일크기와 형상을 갖고 주형과 분리된 탑존세그먼트에 설치된 냉각 및 윤활설비와 연결되게 구비된 풋롤을 포함하여 구성된다.The present invention relates to a foot roll installation structure of a continuous casting machine, a tumbled dish in which molten steel is accommodated, a mold installed in a lower portion of the tundish and receiving molten steel by casting immersion nozzles and casting the cast steel, and hydraulic pressure to vibrate the mold 12. A continuous casting machine comprising a cylinder and a segment having a plurality of rolls spaced therebetween at a lower portion of the mold to cool and draw the cast piece; A fixing bracket extending toward the cast side at the top of the top zone segment closest to the mold in the segment; It is rotatably supported by the fixing bracket and is configured to include a foot roll having the same size and shape as the top zone rolls mounted on the top zone segment and connected to the cooling and lubrication equipment installed on the top zone segment separate from the mold.

본 발명은 주형과 풋롤을 서로 분리시켜 이원화함으로써 교체작업의 용이성, 편의성이 확보되고, 작업시간이 단축되어 생산성 향상에 일조하는 효과를 제공한다.The present invention provides an effect that separates the mold and the foot roll from each other to secure the ease and convenience of replacement work, shorten the working time and contribute to productivity.

연속주조, 주형, 풋롤, 세그먼트, 탑존세그먼트, 탑존롤, 고정브라켓 Continuous Casting, Mold, Foot Roll, Segment, Top Zone Segment, Top Zone Roll, Fixed Bracket

Description

연속주조기의 풋롤 설치구조{FOOT ROLL MOUNTING STRUCTURE OF CONTINUOUS CASTING MACHINE}Foot roll installation structure of continuous casting machine {FOOT ROLL MOUNTING STRUCTURE OF CONTINUOUS CASTING MACHINE}

도 1은 일반적인 연속주조공정을 보인 개략적인 공정도,1 is a schematic process diagram showing a general continuous casting process,

도 2는 종래 주형에 설치된 풋롤을 조립구조를 보인 예시적인 요부 단면도,Figure 2 is an exemplary main sectional view showing the assembly structure of the foot roll installed in the conventional mold,

도 3은 본 발명에 따른 풋롤의 설치구조를 보인 예시적인 요부 단면도.Figure 3 is an exemplary main cross-sectional view showing the installation structure of the foot roll according to the present invention.

♧ 도면의 주요 부분에 대한 부호의 설명 ♧♧ description of the symbols for the main parts of the drawing ♧

2....턴디쉬 3....주형2.Tundish 3 .... Mould

4....주편 12....장변동판4 .... cast 12 .... long side plate

18'....고정브라켓 20,20'....풋롤18 '.... fixed bracket 20,20' .... foot roll

22....탑존세그먼트 24....탑존롤22..Top Zone Segment 24 .... Top Zone Roll

본 발명은 연속주조기의 주형 하부에 부착되어 용강의 철정압에 의한 벌징현상을 방지하고 주편 인발을 담당하는 풋롤에 관한 것으로, 보다 상세하게는 풋롤의 설치위치를 개선하여 별도의 배관라인이 필요없도록 함과 동시에 형상을 단순화시켜 주형과 풋롤의 정비를 이원화시킴으로써 작업성을 향상시키고 변형에 의한 주편 품질저하를 막을 수 있도록 한 연속주조기의 풋롤 설치구조에 관한 것이다.The present invention relates to a foot roll attached to the bottom of the mold of the continuous casting machine to prevent the bulging phenomenon due to the iron static pressure of the molten steel and to take out the cast steel, more specifically to improve the installation position of the foot roll to eliminate the need for a separate piping line In addition, the present invention relates to a foot roll installation structure of a continuous casting machine that simplifies the shape and dualizes the maintenance of the mold and the foot roll to improve workability and prevent deterioration of cast quality due to deformation.

일반적으로, 제철소의 연속주조공정은 용강을 수냉주형중에 주입한 후 아래로부터 연속적으로 인발하면서 2차냉각대에서 강제냉각, 응고를 진행시켜 용강에서 직접 소정의 주편(슬라브, 블룸 또는 빌레트)을 제조하는 공정이다.In general, the continuous casting process of steel mills injects molten steel into water-cooled molds, and then continuously draws them from below, forcing cooling and solidifying in a secondary cooling zone to produce a predetermined cast (slab, bloom or billet) directly from the molten steel. It is a process to do it.

이러한 연속주조공정은 도 1의 도시와 같이, 제강공정을 거친 용강을 이송 래들(1)로부터 수강하는 턴디쉬(2), 상기 턴디쉬(2)로부터 용강을 공급받아 소정의 단면형상으로 응고시키는 주형(3), 응고된 주편(4)을 벤딩 및 스트레이트닝하는 다수의 구동(핀치)롤 및 가이드롤과 스프레이노즐 등의 다수 세그먼트로 이루어진 2차냉각대(5) 및 냉각된 주편(4)을 인출하여 소정길이로 절단하는 TCM(TORCH CUTTER MACHINE) 등의 설비에 의해 이루어진다.In the continuous casting process, as shown in FIG. 1, the molten steel undergoing the steelmaking process is supplied to the tundish 2 receiving the molten steel from the transfer ladle 1, and the molten steel is supplied from the tundish 2 to solidify in a predetermined cross-sectional shape. Secondary cooling stand (5) and cooled slab (4) consisting of a plurality of segments (3), a plurality of drive (pinch) rolls for bending and straightening the solidified slab (4) and guide rolls and spray nozzles It is made by a facility such as TCM (TORCH CUTTER MACHINE) which draws out and cuts it to a predetermined length.

이때, 상기 2차냉각대(5)에 설치사용되는 구동(핀치)롤은 주편(4)의 인발을 담당하고, 가이드롤들은 주편(4)의 벌징(Bulging)을 방지하면서 정해진 주조방향으로 주편(4)을 안내하게 되는데 이들은 고온의 주편(4)과 상시 접촉되어 있기 때문에 열부하에 의한 변형이 쉽고 이러한 열변형은 주편(4) 품질에 악영향을 미치게 된다.At this time, the drive (pinch) roll used to be installed in the secondary cooling stand (5) is responsible for the drawing of the cast steel 4, the guide rolls are cast in a predetermined casting direction while preventing the bulging of the cast steel (4) (4) is guided because they are always in contact with the hot cast (4) is easy to be deformed by the heat load, such thermal deformation will adversely affect the quality of the cast (4).

종래에는 이와 같은 롤들의 열변형을 억제하기 위해 도 2에서와 같은 풋롤(Foot Roll)(20)을 주형(3) 하부에 1~2개 정도 설치하였다.Conventionally, in order to suppress thermal deformation of such rolls, one or two foot rolls 20 as shown in FIG. 2 are installed below the mold 3.

즉, 상기 풋롤(20)은 유압실린더(10)에 의해 수직으로 상하왕복운동하는 주형(3)(장변동판(12)과 단변동판(14)으로 구성)중 장변동판(12)을 냉각시키는 냉각쟈켓(16)의 하부에 브라켓(18)에 의해 지지고정되는 형태로 구비되었다.That is, the foot roll 20 is cooled to cool the long swing plate 12 of the mold 3 (composed of the long swing plate 12 and the short swing plate 14) vertically reciprocating by the hydraulic cylinder 10. A lower portion of the jacket 16 was provided in the form of being supported and fixed by the bracket 18.

그리하여, 주편(4) 인발시 다수의 세그먼트중 최상위인 탑존세그먼트(22)에 구비된 다수의 탑존롤(24)로 상기 주편(4)을 안내함으로써 탑존롤(24), 즉 세그먼트롤들의 인발을 부드럽게 이어주고 철정압에 의한 주편(4)의 벌징을 억제토록 하였다.Thus, the drawing of the top zone roll 24, that is, the segment rolls, is performed by guiding the cast 4 to the plurality of top zone rolls 24 provided in the top zone segment 22, which is the highest of the plurality of segments when the cast piece 4 is drawn out. It smoothly connected and suppressed the bulging of the cast steel 4 by iron positive pressure.

그런데, 상기 풋롤(20)은 보통 세그먼트롤들인 탑존롤(24)들 보다 약한 롤을 사용하는 관계로 잦은 유지보수가 요구되고 있음은 물론 유지보수시 주형(3)과 복잡하게 연결된 냉각, 윤활설비를 함께 분해, 조립해야 하므로 유지보수작업이 어렵고 난해할 뿐만 아니라 작업시간이 과다소요되어 생산성을 급격히 저하시키는 주된 요인이 되고 있다.However, since the foot roll 20 uses a roll that is weaker than the top zone rolls 24, which are usually segment rolls, frequent maintenance is required, as well as cooling and lubrication facilities that are complicatedly connected to the mold 3 during maintenance. It is not only difficult and difficult to maintain, since it needs to be disassembled and assembled together, and it is a major factor that drastically decreases productivity due to excessive work time.

본 발명은 상술한 바와 같은 종래 기술이 갖는 제반 문제점을 감안하여 이를 해결하고자 창출한 것으로, 대략 1400℃ 이상으로 유지되는 주편과의 반복적인 접촉에 의한 고도의 열부하로 변형을 초래하는 풋롤의 교체를 용이하게 하여 유지보수시간을 줄이고 작업의 편의성을 확보토록 함과 동시에 풋롤 교체시에도 주형 설비를 분해 조립하지 않고 풋롤만을 교체조립할 수 있도록 냉각, 윤활설비를 주형과 이원화시켜 작업의 단순화를 도모할 수 있도록 한 연속주조기의 풋롤 설치구조를 제공함에 그 주된 목적이 있다.The present invention has been made in view of the above-mentioned problems of the prior art, and has been created to solve this problem, and it is possible to replace a foot roll that causes deformation due to high heat load by repeated contact with a cast steel maintained at approximately 1400 ° C. or more. In order to reduce maintenance time and ensure the convenience of work, it is possible to simplify the work by dualizing the cooling and lubrication equipment with the mold so that only the foot roll can be replaced and assembled without disassembling the molding equipment even when replacing the foot roll. Its main purpose is to provide a foot roll mounting structure for a continuous casting machine.

본 발명은 상기한 기술적 과제를 달성하기 위하여, 용강이 수용되는 턴디쉬와, 상기 턴디쉬의 하부에 설치되고 침지노즐에 의해 용강을 수납하여 주편으로 주 조하는 주형과, 상기 주형을 진동시키는 유압실린더와, 상기 주형 하부에 그와 간격을 두고 다수 설치되어 주편을 냉각하고 인발하는 다수의 롤을 갖는 세그먼트를 포함하는 연속주조기에 있어서; 상기 세그먼트중 주형과 최근접된 탑존세그먼트의 최상단에 주편측으로 연장형성된 고정브라켓과; 상기 고정브라켓에 의해 회전가능하게 지지되며 탑존세그먼트에 장착되는 탑존롤들과 동일크기와 형상을 갖고 주형과 분리된 탑존세그먼트에 설치된 냉각 및 윤활설비와 연결되게 구비된 풋롤을 포함하여 구성되는 연속주조기의 풋롤 설치구조를 제공함에 그 기술적 특징이 있다.The present invention, in order to achieve the above technical problem, a molten steel is accommodated, a mold installed in the lower portion of the tundish and receiving the molten steel cast by a cast by the immersion nozzle, and the hydraulic pressure to vibrate the mold 12. A continuous casting machine comprising a cylinder and a segment having a plurality of rolls spaced therebetween at a lower portion of the mold to cool and draw the cast piece; A fixing bracket extending toward the cast side at the top of the top zone segment closest to the mold in the segment; Continuous casting machine which is rotatably supported by the fixing bracket and includes a foot roll having the same size and shape as the top zone rolls mounted on the top zone segment and connected to cooling and lubrication equipment installed on the top zone segment separate from the mold. Its technical features are to provide a foot roll mounting structure.

이하에서는, 첨부도면을 참고하여 본 발명에 따른 바람직한 실시예에 대해 상세히 설명하기로 한다.Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment according to the present invention.

도 3은 본 발명에 따른 풋롤의 설치구조를 보인 예시적인 요부 단면도이다.3 is an exemplary main sectional view showing an installation structure of a foot roll according to the present invention.

도 3에 도시된 바와 같이, 본 발명에 따른 풋롤(20')은 장변동판(12)을 냉각시키기 위해 마련된 냉각쟈켓(12)에 설치되던 종래와는 달리 다수의 탑존롤(24)이 설치된 탑존세그먼트(22)의 최상단에 장변동판(12)과 인접하여 설치된다.As shown in FIG. 3, the foot roll 20 ′ according to the present invention has a top zone in which a plurality of top zone rolls 24 are installed, unlike the conventional one installed in a cooling jacket 12 provided to cool the long swing plate 12. The upper end of the segment 22 is provided adjacent to the long swing plate 12.

즉, 탑존롤(24)이 설치되는 탑존세그먼트(22)의 상단 내측면, 다시 말해 주편(4)과 접하는 면 최상단에 탑존롤(24)을 고정하는 것과 동일형태의 고정브라켓(18')을 형성하고, 상기 고정브라켓(18')에 탑존롤(24)과 동일형상과 크기의 풋롤(20')을 회전가능하게 설치고정하는 형태로 구성된다.That is, the fixing bracket 18 ′ having the same shape as that of fixing the top zone roll 24 to the top inner surface of the top zone segment 22 on which the top zone roll 24 is installed, that is, the top surface in contact with the slab 4, is provided. And a foot roll 20 'of the same shape and size as the top zone roll 24 is rotatably installed and fixed to the fixing bracket 18'.

따라서, 상기 풋롤(20')이 주형(3)을 구성하는 장변동판(12) 및 냉각쟈켓(12)과 분리되어 있으므로, 이를 냉각시키기 위한 냉각설비나 혹은 윤활설비들도 상기 주형(3)으로 공급되는 냉각 혹은 윤활설비들과 분리되어 설치되게 된다.Accordingly, since the foot roll 20 'is separated from the long swing plate 12 and the cooling jacket 12 constituting the mold 3, cooling equipment or lubricating equipment for cooling the mold 3 is also transferred to the mold 3. It will be installed separately from the cooling or lubrication equipment supplied.

결국, 상기 풋롤(20')은 주형(3)에 종속되어 설치되었던 기존과는 달리 주형(3)과 별개로 완전히 독립되게 되며, 오히려 탑존롤(24)들이 설치되는 탑존세그먼트(22)에 종속되고 이들로 공급되는 냉각 혹은 윤활설비들과 풋롤(20')을 냉각 혹은 윤활하는 설비들이 연계 구성되게 된다.As a result, the foot roll 20 'is completely independent from the mold 3 unlike the existing one, which is installed in dependence on the mold 3, but rather, depends on the top zone segment 22 in which the top zone rolls 24 are installed. In addition, the cooling or lubrication facilities supplied thereto and the equipment for cooling or lubricating the foot roll 20 'are configured to be linked.

이러한 구성으로 이루어진 본 발명 냉각장치의 작동관계는 다음과 같다.The operating relationship of the present invention cooling device made of such a configuration is as follows.

턴디쉬(2)에 수강되어 있던 용강이 침지노즐(미도시)을 거쳐 주형(3) 내부로 유입되면 수요가가 원하는 폭과 두께로 조절된 장변동판(12) 및 단변동판(14)으로 이루어지고 유압실린더(10)에 의해 주기적으로 상하진동하는 주형(3) 내부에서 용강이 응고되면서 응고셀을 형성하게 되고, 일정이상 응고된 용강이 세그먼트에 부착된 다수의 롤들에 의해 철정압을 유지한 채 냉각되면서 인발되어 필요로 하는 제품, 이를테면 슬라브, 블룸 등을 형성하게 된다.When the molten steel received in the tundish 2 flows into the mold 3 through an immersion nozzle (not shown), the long-driving plate 12 and the short-driving plate 14 are adjusted to a desired width and thickness. As the molten steel solidifies inside the mold 3 periodically vibrating up and down by the hydraulic cylinder 10, the solidified cell is formed. The molten steel solidified more than a predetermined time maintains the iron static pressure by a plurality of rolls attached to the segment. While cooling, the product is drawn to form the necessary products, such as slabs and blooms.

이때, 풋롤(20')은 장변동판(12)의 하단과 최근접된 상태에서 주형(3)을 빠져나온 주편(4)을 탑존세그먼트(22)상의 탑존롤(24)로 부드럽게 안내하면서 이어주게 된다.At this time, the foot roll (20 ') is to guide while gently guiding the slab (4) exiting the mold (3) in the state closest to the lower end of the long-changing plate 12 to the top zone roll (24) on the top zone segment (22). do.

따라서, 장변동판(12) 하단과 탑존롤(24) 상단 사이에서 철정압에 의한 브렉아웃(Break out) 현상을 억제하면서 원활한 주조가 가능토록 하여 준다.Therefore, it is possible to smoothly cast while suppressing the breakout phenomenon due to the positive static pressure between the lower end of the long swing plate 12 and the upper end of the top zone roll 24.

뿐만 아니라, 열변형에 의한 풋롤(20')의 교체나 기타 사유로 유지보수코자 할 경우에도 주형(3)은 손볼 필요없이 탑존세그먼트(22)만을 분리하여 유지보수하면 되므로 작업의 용이성 및 편의성이 확보되고 작업시간을 단축시킬 수 있게 된다.In addition, when the foot roll 20 'is replaced due to heat deformation or other reasons, the mold 3 needs to be separated and maintained only by the top zone segment 22 without any need for maintenance. Can be secured and work time can be shortened.

이상에서 상세히 설명한 바와 같이, 본 발명은 주형과 풋롤을 서로 분리시켜 이원화함으로써 교체작업의 용이성, 편의성이 확보되고, 작업시간이 단축되어 생산성 향상에 일조하는 효과를 제공한다.As described in detail above, the present invention separates the mold and the foot roll from each other so that the ease and convenience of replacement work is secured, and the working time is shortened, thereby providing an effect of improving productivity.

Claims (1)

용강이 수용되는 턴디쉬와, 상기 턴디쉬의 하부에 설치되고 침지노즐에 의해 용강을 수납하여 주편으로 주조하는 주형과, 상기 주형을 진동시키는 유압실린더와, 상기 주형 하부에 그와 간격을 두고 다수 설치되어 주편을 냉각하고 인발하는 다수의 롤을 갖는 세그먼트를 포함하는 연속주조기에 있어서;A tundish for receiving molten steel, a mold installed at a lower portion of the tundish to receive molten steel and casting the molten steel by a immersion nozzle, a hydraulic cylinder for vibrating the mold, and a plurality of spaced portions below the mold. A continuous casting machine comprising a segment having a plurality of rolls installed to cool and draw the cast piece; 상기 세그먼트중 주형과 최근접된 탑존세그먼트의 최상단에 주편측으로 연장형성된 고정브라켓과;A fixing bracket extending toward the cast side at the top of the top zone segment closest to the mold in the segment; 상기 고정브라켓에 의해 회전가능하게 지지되며 탑존세그먼트에 장착되는 탑존롤들과 동일크기 및 형상을 갖고 주형과 분리된 탑존세그먼트에 설치되어 있는 냉각 및 윤활설비와 연결되게 구비된 풋롤을 포함하여 구성되는 것을 특징으로 연속주조기의 풋롤 설치구조.It is rotatably supported by the fixing bracket and is configured to include a foot roll having the same size and shape as the top zone rolls mounted on the top zone segment and connected to the cooling and lubrication system installed on the top zone segment separate from the mold. Foot roll installation structure of the continuous casting machine.
KR1020050099310A 2005-10-20 2005-10-20 Foot roll mounting structure of continuous casting machine KR100721922B1 (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07303951A (en) * 1994-03-16 1995-11-21 Nisshin Steel Co Ltd Secondary cooling method for continuous casting and the device thereof
KR20000007069U (en) * 1998-09-25 2000-04-25 이구택 Cast supporting roll inspection device
JP2005270981A (en) 2004-03-22 2005-10-06 Jfe Steel Kk Method for supporting and guiding short sides of cast slab just below continuous casting mold

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07303951A (en) * 1994-03-16 1995-11-21 Nisshin Steel Co Ltd Secondary cooling method for continuous casting and the device thereof
KR20000007069U (en) * 1998-09-25 2000-04-25 이구택 Cast supporting roll inspection device
JP2005270981A (en) 2004-03-22 2005-10-06 Jfe Steel Kk Method for supporting and guiding short sides of cast slab just below continuous casting mold

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