KR100342311B1 - Method and device for preventing coil edge deformation in annealing process of grain-oriented magnetic steel sheet coil - Google Patents

Method and device for preventing coil edge deformation in annealing process of grain-oriented magnetic steel sheet coil Download PDF

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KR100342311B1
KR100342311B1 KR1019970063855A KR19970063855A KR100342311B1 KR 100342311 B1 KR100342311 B1 KR 100342311B1 KR 1019970063855 A KR1019970063855 A KR 1019970063855A KR 19970063855 A KR19970063855 A KR 19970063855A KR 100342311 B1 KR100342311 B1 KR 100342311B1
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coil
grain
steel sheet
high temperature
magnetic steel
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KR19990042919A (en
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이충수
김재철
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주식회사 포스코
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    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/12—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
    • C21D8/1244—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the heat treatment(s) being of interest
    • C21D8/1272—Final recrystallisation annealing
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/12—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
    • C21D8/1294—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties involving a localized treatment
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
    • C21D9/54—Furnaces for treating strips or wire
    • C21D9/663—Bell-type furnaces
    • C21D9/673—Details, accessories, or equipment peculiar to bell-type furnaces
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
    • C21D9/54—Furnaces for treating strips or wire
    • C21D9/68—Furnace coilers; Hot coilers
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D2221/00—Treating localised areas of an article
    • C21D2221/02—Edge parts

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Electromagnetism (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacturing Of Steel Electrode Plates (AREA)

Abstract

PURPOSE: A method and a device for preventing or reducing deformation of the lower edge part of the coil during high temperature annealing treatment of grain-oriented magnetic steel sheet coil are provided. CONSTITUTION: The method for preventing the coil edge from deforming in annealing process of grain-oriented magnetic steel sheet coil comprises the processes of coiling the coil(6) by maintaining current of reel motor for coiling the grain-oriented magnetic steel sheet coil to the range of 59 to 62 amperes; bending the lower edge part of the coiled coil(6) using bands(3,4) by maintaining banding pressure for the coil(6) to the range of 2 to 3 kg/mm¬2; and performing high temperature annealing treatment on the coil by laying down a banding completed coil(6) on a coil laying part consisted of elastic small grain zircon bubbles. In an apparatus for loading and supporting grain-oriented magnetic steel sheet coil so that high temperature annealing treatment is performed on the coil, the apparatus for preventing the coil edge from deforming in annealing process of the grain-oriented magnetic steel sheet coil comprises a guide ring(13) which has a larger diameter than the coil(6) formed, and which is formed on the upper surface of a base(11); a supporting ring(14) which is formed inside the guide ring(13) that is the central part of the base(11), and on which a steel sleeve(5) inserted into the inner diameter of the coil(6) is laid down to be fixed to the supporting ring(14); and a coil laying part(12) which is formed between the guide ring(13) and supporting ring(14) and consisted of elastic small grain zircon bubbles.

Description

방향성 전기강판 코일의 소둔공정에 있어서 코일 엣지 변형방지 방법 및 장치Method and apparatus for preventing coil edge deformation in annealing of oriented electrical steel coils

본 발명은 주로 변압기 등과 같은 계통의 전기기구 철심제작에 사용되는 방향성 전기강판의 제조에 관련된 것으로, 특히 전기강판 코일의 소둔처리시 코일 엣지부의 변형을 방지할 수 있는 방법 및 장치에 관한 것이다.The present invention relates mainly to the manufacture of oriented electrical steel sheet used in the production of iron cores of electrical appliances such as transformers, and more particularly, to a method and an apparatus capable of preventing deformation of coil edges during annealing of electrical steel coils.

방향성 전기강판은 열연코일을 소재로 하여 1회 또는 2회의 냉간압연을 하고 예비, 회복, 탈탄소둔과 고온소둔 등 3회 또는 4회의 소둔처리과정을 거쳐 제조된다.The grain-oriented electrical steel sheet is made of hot rolled coils by cold rolling once or twice, followed by three or four annealing treatments such as preliminary, recovery, decarbonization and high temperature annealing.

이러한 방향성 전기강판 코일의 소둔처리시 특히 고온소둔과정에서 코일의 하단부에 엣지 변형(Edge Deformation)이 일어나기 쉽고, 이러한 엣지 변형이 발생할 경우 다음 공정인 절연코팅공정 작업시 판파단의 유발과 제품의 폭방향 코팅 불균일 및 변형부의 단부 크랙으로의 변화 때문에 최종 제품화 공정인 정정작업시 변형된 엣지부의 절단을 거쳐야만 제품화가 가능하게 되며, 나아가서 이와 같은 변형 엣지부에 대한 절단제거는 제품 생산성 저하를 초래하는 주된 요인으로 작용하게 된다. 따라서, 상기의 문제를 해소하기 위해서는 코일의 고온소둔과정에서 특히 엣지부 변형으로 인한 결함 발생을 억제시키는 것이 중요한 것이다.In the annealing treatment of such oriented electrical steel coils, edge deformation is likely to occur at the lower end of the coil, especially during high temperature annealing, and when such edge deformation occurs, plate breakage and width of the product are caused during the insulation coating process. Due to the nonuniformity of the directional coating and the change to the end crack of the deformable part, it is possible to produce the product only after the deformed edge part is cut during the corrective operation, which is the final productive process. Act as a factor. Therefore, in order to solve the above problem, it is important to suppress the occurrence of defects due to the deformation of the edge part in the high temperature annealing process of the coil.

일반적으로, 방향성 전기강판의 제조에 있어서는 그 제품의 자기적 특성 확보에 필요한 석출물로서 Al, N, Mn, S, Cu,Sn, Sb(이하, '1차 재결정 억제재'라고도 칭함)중 2개 또는 그 이상의 성분을 적절하게 배합하고 그 외에 불가피하게 혼합된 성분을 갖는 슬라브(SLAB)를 1350℃이상의 고온 재가열과정을 거친 후 조압연기를 통하여 중간두께로 중간압연하고,이어서 마무리 압연기에서 목표두께로의 최종압연을 거친 후 3,4회의 소둔과 1회 또는 2회의 압연과정과 절연코팅공정을 거친후 최종제품이 생산된다. 특히 최종적인 방향성 전기강판 제품의 안정된 자기적 특성을 확보하기 위해 열연공정에서 미세하게 형성된 석출물(또는 1차재결정억제제(Inhibitor))이 2차 재결정립조직을 성장 및 활성화시키게 되고, 이후 잔류불순물의 완전제거를 통한 우수한 자기적 특성을 가진 제품을 만들기 위해서는 1100℃ 이상의 고온소둔처리가 반드시 필요하며, 고온소둔처리된 소재는 절연코팅공정과 정정공정을 거친 후 수요가에게 공급된다.Generally, in the manufacture of grain-oriented electrical steel sheet, two of Al, N, Mn, S, Cu, Sn, and Sb (hereinafter referred to as 'primary recrystallization inhibitor') as precipitates necessary for securing the magnetic properties of the product or After slab slab (SLAB) having appropriately blended components and inevitably mixed components is subjected to a high temperature reheating process of 1350 ° C or higher, the medium is rolled to medium thickness through a rough rolling mill, and then to the target thickness in the finishing mill. After the final rolling, the final product is produced after 3, 4 annealing, 1 or 2 rolling and insulation coating. In particular, in order to secure stable magnetic properties of the final grain-oriented electrical steel sheet products, finely formed precipitates (or primary recrystallization inhibitors) in the hot rolling process grow and activate secondary recrystallized grains, and then the residual impurities In order to make products with excellent magnetic properties through complete removal, high temperature annealing treatment over 1100 ℃ is necessary, and the material subjected to high temperature annealing is supplied to demand after going through insulation coating process and correction process.

도1, 도2는 위와 같은 방향성 전기강판 코일을 고온소둔처리하기 위해 사용되어온 종래의 장치를 보여 주며, 이 장치는베이스(1)상에 코일안치부(2)를 형성하고, 상기 코일안치부(2)상에 그 외주가 밴드(3)(4)로 고정되고 중심부는 스틸슬리브(5)로 지지된 일정직경의 코일(6)을 얹은 후 커버(7)를 씌어 1100℃ 이상의 온도에서 고온소둔처리를 행하도록 되어 있다. 그러나, 이러한 종래의 장치를 사용한 코일(6)의 고온소둔처리시에는 주로 상기 코일(6)의 하단부에서 도1에 예시된 바와 같은 변형 엣지부(8)가 발생하기 쉬우며, 이러한 변형 엣지부(8)의 발생은 후속의 절연코팅공정에서 판파단 유발에의한 라인가동중지 등 공정장애를 발생시키게 된다. 뿐만 아니라, 과다하게 변형 발생된 엣지부(8)는 제품화 공정인 정정공정에서 변형부위 절단작업후 수요가에게 공급됨으로써 수요가의 주문에 부합하지 않는 제품공급에 의한 수요가 불만 및 제조원가 상승을 초래하는 주 요인으로 작용하게 된다.1 and 2 show a conventional apparatus which has been used for high temperature annealing of such a directional electrical steel coil, which forms a coil settling portion 2 on the base 1, and the coil settling portion. The outer periphery is fixed on the band (2) by the band (3) (4), and the central part is mounted with a coil 6 having a constant diameter supported by the steel sleeve 5, and then the cover 7 is put on, and the temperature is higher than 1100 ° C. The annealing process is performed. However, during the high temperature annealing treatment of the coil 6 using such a conventional apparatus, the deformable edge portion 8 as illustrated in FIG. 1 is likely to occur mainly at the lower end portion of the coil 6, and such deformed edge portion. The occurrence of (8) will cause process failures such as stopping the line due to plate breakage in the subsequent insulation coating process. In addition, the excessively deformed edge part 8 is supplied to the demand price after cutting the deformation part in the correction process, which is a commercialization process, resulting in a dissatisfaction and a rise in manufacturing cost due to supply of a product that does not meet the demand order. Act as the main factor.

이와 같은 코일의 고온소둔처리시 코일의 엣지부 변형 발생은 주로 베이스(1)면에 접하는 코일의 하단 부위에서 발생되며, 이것의 발생정도는 소재의단위중량과 소둔온도 및 시간의 증가에 따라 커지게 된다.In the high temperature annealing treatment of the coil, the deformation of the edge portion of the coil is mainly generated at the lower portion of the coil in contact with the surface of the base (1), and the degree of occurrence thereof increases with increasing unit weight of the material, annealing temperature, and time. You lose.

이러한 코일 엣지부 변형의 발생원인은 첫째 고온소둔작업전인 탈탄작업시 코일의 권취장력 미흡에 의한 변형공간의 과다형성과, 둘째 고온소둔과정중 소재의 하중이 베이스(1)면에 접하는 코일(6)의 엣지부(8) 팽창에 미치는 정도가 극에 달하는 시점(1100℃이상의 고온소둔구간)에서 코일(6)의 엣지부(8)에서의 팽창력이 타부위에서 보다 크게 되어 엣지부(8)의변형을 가져오게 되기 때문이다.The cause of the deformation of the coil edge is firstly formed by overforming the deformation space due to insufficient winding tension of the coil during the decarburization work before the high temperature annealing operation, and secondly the coil in which the load of the material is in contact with the surface of the base 1 during the high temperature annealing process. At the point where the extent of the edge portion 8 expansion of the edge reaches the pole (high temperature annealing section of 1100 ° C. or more), the expansion force at the edge portion 8 of the coil 6 becomes greater than that at the other portion, This is due to the deformation.

방향성 전기강판 코일의 고온소둔처리시 상기와 같은 엣지부 변형발생을 방지하기 위한 기술은 지금까지 제안된 바 없었으며, 이러한 엣지부의 변형 문제는 지금까지 방향성 전기강판 제품의 제조생산처에서 공통적이고 만성적으로 봉착하고있는 문제점인 것으로 생각된다.The technique for preventing the edge portion deformation during the high temperature annealing treatment of the grain-oriented electrical steel coil has not been proposed until now, and this problem of deformation of the edge portion is common and chronically common in the manufacturing and production of oriented electrical steel sheet products It seems to be a problem encountered.

본 발명은 상술한 바와 같은 종래의 문제점에 주목하여 연구발명된 것으로 방향성 전기강판 제조에 있어서 전기강판 코일의 엣지부 변형이 집중 발생되는 고온소둔작업시 베이스면에 접한 코일의 하단 엣지부에 걸리는 하중에 의한 팽창력을 줄이는 것보다 분산시키도록 하는 것에 그 주안점을 두었다.The present invention has been researched in view of the conventional problems as described above, the load applied to the lower edge portion of the coil in contact with the base surface during the high temperature annealing operation where the edge portion deformation of the electrical steel coil is concentrated in the production of oriented electrical steel sheet The focus was on dispersing rather than reducing the expansion force.

즉, 본 발명은 방향성 전기강판 코일의 고온소둔처리시 코일의 베이스면에 접하는 하단 엣지부에 걸리는 하중에 의한 팽창력을 효과있게 분산시킴으로써 엣지부 변형을 최소화할 수 있는 방법 및 장치를 제공하는 데에 그 목적이 있다.That is, the present invention provides a method and apparatus for minimizing edge deformation by effectively dispersing the expansion force due to the load applied to the lower edge portion in contact with the base surface of the coil during the high temperature annealing treatment of the oriented electrical steel coil. Its purpose is.

도1은 종래의 장치에 의한 방향성 전기강판코일의 소둔상태를 보여 주는 사시도,1 is a perspective view showing an annealing state of the grain-oriented electrical steel coil by a conventional apparatus,

도2는 종래의 장치에 소둔대상 코일을 안착하기 전의 상태를 보여 주는 분해사시도,Figure 2 is an exploded perspective view showing a state before mounting the annealing target coil in the conventional device,

도3은 본 발명에 따른 장치에 소둔대상 코일을 안착하기 전의 상태를 보여주는 분해사시도,3 is an exploded perspective view showing a state before the annealing target coil is seated in the apparatus according to the present invention;

도4는 본 발명에 따른 장치의 소둔처리상태 단면도,4 is a cross-sectional view of the annealing state of the apparatus according to the present invention;

* 도면의 주요부분에 대한 부호의 설명 *Explanation of symbols on the main parts of the drawings

3, 4 : 밴드 5 : 스틸슬리브3, 4: band 5: steel sleeve

6 : 코일 11 : 베이스6: coil 11: base

12 : 코일안치부 13 : 가이드링12 coil set-up 13 guide ring

14 : 지지링 17 : 커버14: support ring 17: cover

이하에서, 상술한 목적을 달성하기 위한 본 발명을 첨부도면을 참조하여 더욱 상세히 설명한다.Hereinafter, with reference to the accompanying drawings, the present invention for achieving the above object will be described in more detail.

본 발명은 방향성 전기강판 제품의 제조에 관련된 것으로, 제품의 자기적 특성을 확보하는 데에 필요한 석출물로서 Al,N, Mn, S, Cu, Sn, Sb 중 2개 또는 그 이상의 성분을 적절하게 배합한 소재를 이용하여 가열로와 조압연, 마무리압연 등의 과정을 거쳐 방향성 전기강판 제조용 열연 코일을 제조한다. 이 열연 코일에 대해 3회 또는 4회 소둔과 1회 또는 2회의 압연 및 절연코팅을 행하여 목적하는 방향성 전기 강판 제품을 제조한다.The present invention relates to the production of grain-oriented electrical steel sheet products, as a precipitate required to secure the magnetic properties of the product, as appropriately blending two or more components of Al, N, Mn, S, Cu, Sn, Sb Using a material, a hot rolled coil for manufacturing oriented electrical steel sheet is manufactured through a process such as a heating furnace, rough rolling, and finish rolling. The hot rolled coil is subjected to three or four annealing, and one or two rolling and insulation coating to produce the desired grain-oriented electrical steel sheet product.

본 발명은 이러한 전기강판 제품을 제조하기 위한 코일의 고온소둔작업시 코일의 엣지부 변형을 방지하기 위해 코일의 권취 및 밴딩 상태를 개선하고, 또 코일이 안치되어 고온소둔처리되는 장치를 개선한 것이다.The present invention is to improve the coiling and bending state of the coil to prevent the deformation of the edge of the coil during the high temperature annealing operation of the coil for manufacturing the electrical steel sheet, and to improve the apparatus that the coil is placed in the high temperature annealing treatment .

이를 좀더 상세히 설명하면, 방향성 전기강판 제조에 있어 최종 제품의 자기적 특성 확보를 위해서는 고온소둔공정에서1100℃이상의 고온에서 장시간 작업이 필요하게 되며, 이 과정에서 전술한 바와 같은 코일의 엣지부 변형이 일어나게 된다.In more detail, in order to secure the magnetic properties of the final product in the manufacture of grain-oriented electrical steel sheet it is necessary to work for a long time at a high temperature of more than 1100 ℃ in the high temperature annealing process, the deformation of the edge portion of the coil as described above Get up.

실질적으로, 소둔온도를 낮추고 소둔시간을 단축시키면 코일의 엣지부 변형을 다소 억제할 수는 있지만, 이 경우는 제품에 부여하여야 하는 자기적 특성의 확보가 불가능하게 된다.In practice, lowering the annealing temperature and shortening the annealing time can somewhat suppress the deformation of the edge portion of the coil, but in this case, it is impossible to secure the magnetic properties that must be imparted to the product.

따라서, 소둔온도 및 시간에 변화를 주지 않고 코일의 엣지부 변형을 최소화하려면 고온소둔공정의 전공정인 탈탄소둔공정에서 코일에 대한 권취 및 밴딩 상태를 적합하게 조정하고, 또 코일의 고온소둔처리가 행하여지는 장치를 개선하여야만목적달성이 가능하게 된다.Therefore, in order to minimize the edge deformation of the coil without changing the annealing temperature and time, the winding and banding state of the coil is appropriately adjusted in the decarbonization annealing process, which is a preliminary step of the high temperature annealing process, and the high temperature annealing treatment of the coil is performed. The purpose of this is to be achieved only by improving the device.

코일에 대한 권취상태의 개선은 권취장력의 적정화를 통해 최적의 표면품질이 확보하면서 변형 공간을 최소화하는 것이다. 그러나, 권취장력이 너무 클 경우 고온소둔과정에서 코일내부에 잔류 수분이 존재하게 되어 FeO계의 이상 산화물이 형성되고, 이로 인하여 제품의 표면품질이 불량하게 되는 현상이 발생된다.The improvement of the winding state for the coil is to minimize the deformation space while ensuring the optimum surface quality through the optimization of the winding tension. However, if the winding tension is too large, residual moisture is present in the coil during the high temperature annealing process, thereby forming a FeO-based abnormal oxide, resulting in a poor surface quality of the product.

코일에 대한 밴딩상태의 개선은 고온소둔작업시 소둔장치의 베이스면에 접하는 코일 하단 엣지부의 팽창력을 적정하게 분산시켜 주기 위한 것이다. 이때, 코일에 대한 밴딩압력이 너무 클 경우 코일의 밴딩부 인접부위에서 이상변형이 형성되어오히려 과다 불량을 초래하게 된다.The improvement of the bending state for the coil is to properly distribute the expansion force of the lower edge of the coil in contact with the base surface of the annealing device during the high temperature annealing operation. At this time, if the bending pressure for the coil is too large, an abnormal deformation is formed in the adjacent portion of the bending portion of the coil, resulting in excessive failure.

본 발명에 따른 장치는 도3, 도4와 같이 동 장치를 통해 고온소둔처리되는 코일(6)의 하단 엣지부 변형을 억제시키는 수단을 구비한다. 이와 같은 장치의 구성 목적은 다음과 같다. 종래의 고온소둔 장치에 있어서는 고온소둔작업시 온도 및 작업시간이 증가해감에 따라 코일의 하중에 의해 코일의 베이스 면에 접한 엣지부의 팽창력이 점차 증가해 가게 되고 이에 따라 일어나는 힘의 전이현상으로 엣지부의 변형이 발생된다.The apparatus according to the invention is provided with means for suppressing the deformation of the lower edge of the coil 6 which is subjected to a high temperature annealing through the apparatus as shown in FIGS. 3 and 4. The purpose of the configuration of such a device is as follows. In the conventional high temperature annealing device, as the temperature and working time increase during the high temperature annealing operation, the expansion force of the edge portion in contact with the base surface of the coil gradually increases due to the load of the coil. Deformation occurs.

따라서, 본 장치는 상기와 같은 고온소둔처리 코일을 탄성력이 있는 미립 지르콘 버블(ZIRCON BUBBLE)로 이루어진 코일안치부상에 얹어 소둔처리를 행하도록 구성함으로써 코일의 엣지부로 전이되는 하중에 의한 힘을 분산시키고, 이로써 코일의 하단 엣지부에서의 팽창력을 완화하여 코일 엣지부의 변형을 억제시키도록 된 것이다.Therefore, the apparatus is configured to perform annealing by placing the high temperature annealing coil as described above on a coil seat made of elastic Zircon Bubble, thereby dispersing the force caused by the load transferred to the edge of the coil. In this way, the expansion force at the lower edge portion of the coil is alleviated to suppress deformation of the coil edge portion.

이를 좀더 상세히 설명해 보면, 본 발명의 장치는 도3, 도4에 도시된 바와 같이 베이스(11)상에 가이드링(13)과 스틸슬리브(5)의 안착고정을 위한 지지링(14)을 형성하고, 상기 가이드링(13) 및 지지링(14) 내측에 미립상의 지르콘 버블을 채워코일안치부(12)를 형성하여서 된 것이다. 처리대상 코일(6)은 상기 코일안치부(12)상에 얹혀진 후 커버(17)가 씌워진 상태에서 고온소둔처리되며, 이때 상기 코일(6)의 외주를 밴딩고정시키는 밴드(3)(4)는 바람직하게는 코일(6)의 상단 엣지부에 인접한 위치와 하단 엣지부의 위치에 자리한다.In more detail, the apparatus of the present invention forms a support ring 14 for fixing the guide ring 13 and the steel sleeve 5 on the base 11 as shown in FIGS. 3 and 4. In addition, the guide ring 13 and the support ring 14 are filled with particulate zircon bubbles to form the coil settled portion 12. The coil 6 to be treated is subjected to high temperature annealing in a state in which the cover 17 is covered after being placed on the coil set part 12, and at this time, bands 3 and 4 for bending the outer circumference of the coil 6. Is preferably located at positions adjacent to the top edge of the coil 6 and at the position of the bottom edge.

(실시예)(Example)

방향성 전기강판 코일의 권취장력, 밴딩상태 등에 변화를 주면서 코일의 고온소둔처리를 행하고, 그 결과를 다음 [표1]에 나타내었다.The coils were subjected to high temperature annealing while varying the winding tension, bending state, and the like of the grain-oriented electrical steel coil, and the results are shown in Table 1 below.

여기에서, 권취장력의 변동치 적용은 아날로그타입의 제어시스템 사용과 관련하여 장력과 비례관계에 있는 릴 모터의 전류치변화로 적용하였다.Here, the application of the variation of the winding tension is applied to the change of the current value of the reel motor which is proportional to the tension related to the use of the analog type control system.

본 발명은 코일의 고온소둔처리시 코일 엣지부의 변형량을 최소화하는 것에 의해 최적의 표면품질과 자기적 특성의 확보및 생산성향상이 얻어지게 된다는 전제조건하에서 고온소둔공정 전공정인 탈탄소둔공정 작업시 코일에 최적 권취장력을부여키 위한 릴 모터의 전류치조정과 밴딩상태의 변경 실험들을 통해 상기 목적달성을 위한 최적 작업조건을 알아낼 수있었다.The present invention is to provide the coil during the decarbonization annealing process, which is a pre-temperature annealing process under the precondition that the optimum surface quality and magnetic properties are secured and the productivity is improved by minimizing the amount of deformation of the coil edge during the high temperature annealing treatment of the coil. Through experiments of the current value adjustment and the change of the bending state of the reel motor to give the optimum winding tension, it was possible to find out the optimum working conditions for achieving the object.

[표 1]TABLE 1

Figure pat00001
Figure pat00001

* 위 표에서 ×는 불량, △는 보통, ○은 양호, ◎은 아주 양호를 각각 나타낸다.* In the above table, x is poor, △ is normal, ○ is good, and ◎ is very good.

상기 [표1]은 본 발명의 장치를 사용하지 않은 경우의 결과이며, 본 발명의 장치 사용시에는 엣지 변형량이 30%이상 더욱감소되는 효과가 있었다.Table 1 shows the results when the device of the present invention is not used, and the use of the device of the present invention further reduces the amount of edge deformation by 30% or more.

상기 [표1]에서 비교재21∼24의 경우와 같이 코일(6)을 권취하는 릴 모터의전류크기를 59∼62 암페어범위로 하고 밴드(4)를 코일(6)의 하단 엣지부에 위치시키되 그 밴딩압력을 2∼3kg/㎟범위로 설정하여 고온소둔처리를 행할 경우 특히 양호한 결과가 얻어짐을 알 수 있으며, 상기 코일(6)을 전술한 바와 같이 지르콘 버블로 이루어진 코일안치부(12)를 갖는본 발명의 장치를 통해 고온소둔처리를 할 경우에는 코일의 엣지부 변형량을 더욱 크게 감소시킬 수가 있다.As in the case of Comparative Materials 21 to 24 in Table 1, the current size of the reel motor winding the coil 6 is in the range of 59 to 62 amps, and the band 4 is positioned at the lower edge of the coil 6. However, when the high temperature annealing treatment is performed with the bending pressure set in the range of 2 to 3 kg / mm 2, it can be seen that particularly good results are obtained. The coil settling portion 12 made of zircon bubbles as described above is described above. When the high temperature annealing treatment is performed through the apparatus of the present invention, the amount of deformation of the edge portion of the coil can be further reduced.

여기에서, 상기 릴 모터의 전류크기를 59~62 암페어 범위로 한정하는 것은 62를 초과하게 되면 코일 권취장력이 증대되어 상술한 바와 같은 표면결함이 유발되고, 59에 미달되게 되면 권취장력이 떨어져 적정한 권취형상을 유도할 수 없기 때문이다.Here, limiting the current size of the reel motor to the range of 59 to 62 amps causes the coil winding tension to increase when exceeding 62, causing surface defects as described above. This is because the winding shape cannot be induced.

아울러, 밴딩압력을 상술한 바와 같이 한정하는 이유는 3을 초과하게 되면 이상변형이 형성되어 과다 불량이 초래되고, 2에 미달되게 되면 밴딩불량이 초래될 수 있기 때문에 이와 같이 한정함이 바람직하다.In addition, the reason for limiting the bending pressure as described above is preferably limited to the above because an abnormal deformation is formed when it exceeds 3, and excessive defects are caused, and when it is less than 2, a bending defect may be caused.

본 발명은 상술한 바와 같은 특징들에 의해 방향성 전기강판 코일의 고온소둔처리시 코일의 엣지부 변형발생을 최소화하여 제품의 품위를 높이고 생산성을 크게 향상시킬 수 있는 효과를 제공한다.The present invention provides the effect of improving the product quality and greatly improving the product quality by minimizing the deformation of the edge portion of the coil during the high temperature annealing treatment of the grain-oriented electrical steel coil by the features as described above.

Claims (2)

방향성 전기강판 코일을 권취하는 릴 모터의 전류를 59∼62 암페어범위로 하여 코일(6)을 권취하는 과정과;Winding the coil 6 with a current of a reel motor winding the directional electrical steel sheet coil in a range of 59 to 62 amps; 권취된 코일(6)의 하단 엣지부를 밴드(4)로 그 코일(6)에 대한 밴딩압력을 2∼3km/㎟범위로 하여 밴딩하는 과정과;Bending the lower edge portion of the wound coil 6 to the band 4 with a bending pressure for the coil 6 in a range of 2 to 3 km / mm 2; 밴딩완료된 코일(6)을 탄성력 있는 미립 지르콘버블로 이루어진 코일안치부에 안착시켜 고온소둔처리하는 과정을 포함하여 이루어지는 것을 특징으로 하는 방향성 전기강판 코일의 소둔공정에 있어서 코일 엣지 변형방지 방법.A method of preventing coil edge deformation in an annealing process of a grain-oriented electrical steel sheet coil comprising the step of seating a coiled coil (6) on a coil seat made of elastic fine particle zircon. 방향성 전기강판 코일을 장입지지하여 고온소둔처리하는 장치로서,An apparatus for high temperature annealing by loading a directional electrical steel coil, 베이스(1)의 상면에 코일(6)의 직경보다 큰 가이드링(13)을 형성하고;Forming a guide ring 13 larger than the diameter of the coil 6 on the upper surface of the base 1; 상기 베이스(1)의 중심부인 가이드링(13)의 안쪽에 상기 코일(6)의 내경에 삽입된 스틸슬리브(5)가 안착고정되는 지지링(14)을 형성하며;Forming a support ring (14) in which a steel sleeve (5) inserted into an inner diameter of the coil (6) is seated and fixed inside the guide ring (13), which is the center of the base (1); 상기 가이드링(13)과 지지링(14) 사이에는 탄성력을 갖는 미립 지르콘버블로 이루어진 코일안치부(12)를 형성하여서 된 것을 특징으로 하는 방향성 전기강판 코일의 소둔공정에 있어서 코일 엣지 변형방지 장치.Coil edge deformation preventing device in the annealing process of the grain-oriented electrical steel sheet coil, characterized in that formed between the guide ring 13 and the support ring 14 by forming a coil set-up portion 12 made of fine zircon bubble having elastic force .
KR1019970063855A 1997-11-28 1997-11-28 Method and device for preventing coil edge deformation in annealing process of grain-oriented magnetic steel sheet coil KR100342311B1 (en)

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JPS6256526A (en) * 1985-09-05 1987-03-12 Nippon Steel Corp High temperature finish annealing method for grain oriented magnetic steel sheet
JPH02232320A (en) * 1989-03-07 1990-09-14 Nippon Steel Corp Finish annealing method for grain oriented magnetic steel sheet
JPH08232021A (en) * 1995-02-27 1996-09-10 Nippon Steel Corp Method for finish-annealing grain oriented electrical steel sheet
KR0116094Y1 (en) * 1994-11-22 1998-06-15 김만제 Center guide of coil multiplex stock with heat treatment furnace

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JPS6256526A (en) * 1985-09-05 1987-03-12 Nippon Steel Corp High temperature finish annealing method for grain oriented magnetic steel sheet
JPH02232320A (en) * 1989-03-07 1990-09-14 Nippon Steel Corp Finish annealing method for grain oriented magnetic steel sheet
KR0116094Y1 (en) * 1994-11-22 1998-06-15 김만제 Center guide of coil multiplex stock with heat treatment furnace
JPH08232021A (en) * 1995-02-27 1996-09-10 Nippon Steel Corp Method for finish-annealing grain oriented electrical steel sheet

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