JPH0762453A - Apparatus for annealing grain oriented silicon steel - Google Patents
Apparatus for annealing grain oriented silicon steelInfo
- Publication number
- JPH0762453A JPH0762453A JP21050593A JP21050593A JPH0762453A JP H0762453 A JPH0762453 A JP H0762453A JP 21050593 A JP21050593 A JP 21050593A JP 21050593 A JP21050593 A JP 21050593A JP H0762453 A JPH0762453 A JP H0762453A
- Authority
- JP
- Japan
- Prior art keywords
- coil
- spacer
- base plate
- ceramic fiber
- annealing
- 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
Links
Landscapes
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、方向性珪素鋼帯コイル
（以下、コイルという）の焼鈍装置に関し、特にコイル
端部に発生する所謂耳歪の発生を防止する技術に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an annealing device for a directional silicon steel strip coil (hereinafter referred to as a coil), and more particularly to a technique for preventing the occurrence of so-called ear strain that occurs at the coil end.
【０００２】[0002]
【従来の技術】現在、一般に使用されているコイルの焼
鈍装置を、図３（ａ）に示す。それは、コイル１を炉床
６上の支持金物２、コイル置台であるベースプレート
３、スペーサ４を重ねて敷いた上にアップエンド状に載
置し、シールされたインナケース５をかぶせて加熱、冷
却をするものである。その際、加熱はインナーケース５
の外部からのガス加熱、炉床からのヒータ７による熱供
給によって行なわれる。2. Description of the Related Art A coil annealing apparatus which is generally used at present is shown in FIG. That is, the coil 1 is placed in an up-end shape on a support metal 2 on a hearth 6, a base plate 3 which is a coil mounting base, and a spacer 4, and is placed in an up-end shape. Is what you do. At that time, the heating is done by the inner case 5.
Is performed by heating gas from the outside and supplying heat by the heater 7 from the hearth.
【０００３】ところで、加熱昇温時にはコイル１と同様
にベースプレート３も加熱されるが、この際ベースプレ
ート３下面は直接熱をうけるのに対して、上面は巨大な
吸熱体のコイル１を積載しているので、上面と下面にお
いて温度差を生じ、最終的には、下面の熱膨張量が上面
の熱膨張量よりも大きくなり、ベースプレート３が上反
りをする。このため、コイル１下端部がベースプレート
３上のスペーサ金物４に不均一に接触し、所謂耳歪と呼
ばれるコイルの形状欠陥を生ずる。耳歪の発生状況を図
３（ｂ）に、耳歪の深さと長さの状態を図３（ｃ）に示
す。また、この耳歪発生には、加熱時のコイル１内温度
勾配に基づく、コイル１半径方向の熱膨張量の差によ
り、鋼帯の層間が大きくなるために発生するという原因
も挙げられている。その他、歪の発生程度はスペーサ４
の上面が平滑なうちは軽いが、その繰り返し使用により
上面が荒れて凹凸が甚だしくなると、顕著に大きい歪が
生じる。By the way, at the time of heating and heating, the base plate 3 is also heated like the coil 1. At this time, the lower surface of the base plate 3 is directly subjected to heat, while the upper surface is loaded with the coil 1 of a huge heat absorber. Therefore, a temperature difference occurs between the upper surface and the lower surface, and finally the thermal expansion amount of the lower surface becomes larger than the thermal expansion amount of the upper surface, and the base plate 3 warps upward. Therefore, the lower end of the coil 1 comes into uneven contact with the spacer metal 4 on the base plate 3 to cause a coil shape defect called so-called ear strain. FIG. 3B shows the state of occurrence of ear strain, and FIG. 3C shows the state of depth and length of ear strain. The cause of this ear strain is also caused by the fact that the gap between the steel strips becomes large due to the difference in the amount of thermal expansion in the radial direction of the coil 1 based on the temperature gradient inside the coil 1 during heating. . In addition, the degree of distortion is determined by the spacer 4
Although it is light while the top surface is smooth, if it is repeatedly used and the top surface becomes rough and the unevenness becomes serious, a significantly large distortion occurs.
【０００４】このようなコイル１端部の歪は、製品とし
ての価値を下げて歩止を低下させるので、コイル１焼鈍
上の重大な問題であった。そこで、この耳歪を防止する
方法に関しては、従来より研究開発がなされており、成
果として特許出願等も多々存在する。特公昭５３−３８
６８３号公報は「スペーサ４を分割して耳歪を防止す
る」技術を開示し、特開昭６０−１３１９２８号公報は
「ベースプレート３の外周側を内周側より低くして上反
りを緩和する」方法を提案している。また、特開平１−
１１０２５５号公報に開示のごとく、「ベースプレート
３やスペーサ４自体をセラミックス製として上反りを抑
制する」ことも考えられている。Such distortion of the end portion of the coil 1 is a serious problem in annealing the coil 1 because it lowers the value as a product and reduces the yield. Therefore, research and development have been conventionally performed on the method for preventing the ear distortion, and as a result, there are many patent applications and the like. Japanese Patent Publication Sho 53-38
Japanese Patent Laid-Open No. 683 discloses a technique of "dividing the spacer 4 to prevent ear distortion", and Japanese Patent Laid-Open No. 60-131928 discloses that "the outer peripheral side of the base plate 3 is made lower than the inner peripheral side to reduce the warp. "Proposed method. In addition, JP-A-1-
As disclosed in Japanese Patent No. 110255, it is also considered that "the base plate 3 and the spacers 4 themselves are made of ceramics to suppress warpage".
【０００５】しかし、スペーサ４を分割したり、ベース
プレート３に傾斜をつける技術等は、それらの使用回数
を重ねるうちに、高温クリープによる変形を必然的に起
こしてしまい、平坦度を保持できず、効果が持続できな
いという問題があった。ベースプレート３やスペーサ４
をセラミック製とする方法は、材料の靭性が低くいし、
材料コストが高いので、実用する上で問題があった。However, the technique of dividing the spacer 4 or inclining the base plate 3 inevitably causes deformation due to high temperature creep as the number of times of using them is increased, and flatness cannot be maintained. There was a problem that the effect could not be sustained. Base plate 3 and spacer 4
Is made of ceramic, the toughness of the material is low,
Since the material cost is high, there was a problem in practical use.
【０００６】一方、実用された技術としては、特開昭５
８−６１２３１（特公昭６２−１５６１５）号公報に開
示されたごとく、ベースプレート３とスペーサ４の間
に、セラミック繊維板を敷く方法がある。この方法は、
セラミック繊維板が比較的に安価であるため、使用され
たものである。しかしながら、この方法は、セラミック
繊維板の断熱性のためコイル１下面からの入熱量が減少
してしまう欠点があり、コイル１内温度差が大きくなっ
て、耳歪の防止効果が今一歩である。また、コイル１の
内巻部に凹凸状の形状欠陥を併発するという別の問題も
あった。On the other hand, as a practical technique, Japanese Patent Laid-Open No.
As disclosed in Japanese Patent Publication No. 8-61231 (Japanese Patent Publication No. 62-15615), there is a method of laying a ceramic fiber board between the base plate 3 and the spacer 4. This method
It is used because ceramic fiberboard is relatively inexpensive. However, this method has a drawback that the heat input from the lower surface of the coil 1 is reduced due to the heat insulating property of the ceramic fiber board, the temperature difference in the coil 1 becomes large, and the effect of preventing ear distortion is another step. . In addition, there is another problem in that the inner winding portion of the coil 1 also causes uneven shape defects.
【０００７】[0007]
【発明が解決しようとする課題】本発明は、かかる事情
を鑑み、方向性珪素鋼帯コイルの下端部に焼鈍時に発生
する耳歪を著しく減少できる優れた焼鈍装置の提供を目
的とするものである。SUMMARY OF THE INVENTION In view of the above circumstances, the present invention has an object of providing an excellent annealing apparatus capable of significantly reducing the ear strain generated at the lower end of the grain-oriented silicon steel strip coil during annealing. is there.
【０００８】[0008]
【課題を解決するための手段】発明者は、上記目的を迅
速に達成するため、前記特開昭５８−６１２３１（特公
昭６２−１５６１５）号公報に記載された「ベースプレ
ート３上にセラミック繊維板を敷く技術」の改良をあら
ゆる視点から検討し、その実施効果をさらに高めるため
の工夫を凝らした。本発明は、かかる努力のもとでなさ
れたもので、ベースプレート上に敷いたスペーサに方向
性珪素鋼帯コイルをアップエンド状に載置して加熱、冷
却する焼鈍装置において、上記ベースプレートとスペー
サの間に、多数の貫通孔を有するセラミック繊維板を配
設したことを特徴とする焼鈍装置である。さらに、本発
明の好適な態様は、上記貫通孔数を、セラミック繊維板
の中心側で密、外周側で粗としたことを特徴とする請求
項１記載の方向性珪素鋼帯の焼鈍装置である。SUMMARY OF THE INVENTION In order to quickly achieve the above-mentioned object, the inventor of the present invention has disclosed in Japanese Patent Application Laid-Open No. 58-61231 (Japanese Patent Publication No. 62-15615) "Ceramic fiber board on base plate 3". We examined the improvement of the "laying technology" from all points of view, and devised ways to further enhance the effect. The present invention has been made in view of such efforts, and in an annealing apparatus for heating a directional silicon steel strip coil in an up-end manner on a spacer laid on a base plate and heating and cooling the spacer, The annealing device is characterized in that a ceramic fiber plate having a large number of through holes is arranged between them. Further, in a preferred aspect of the present invention, the annealing device for a directional silicon steel strip according to claim 1, wherein the number of through holes is dense on the center side of the ceramic fiber plate and rough on the outer peripheral side. is there.
【０００９】この場合、セラミック繊維板は高断熱性の
耐火繊維の一種であり、アルミナ（Ａｌ2 Ｏ3 ），シリ
カ（ＳｉＯ2 ）を主成分としてＡｌ2 Ｏ3 ／ＳｉＯ2 の
比率によって標準タイプ、高温タイプ、超高温タイプに
区別して使用されるが、今後の技術開発による新種のも
のであっても良い。また、その厚みは焼鈍温度によって
種々替えられるが、通常は１５〜４０ｍｍである。In this case, the ceramic fiber board is a kind of refractory fiber having a high heat insulating property, and is composed of alumina (Al 2 O 3 ), silica (SiO 2 ) as a main component and a standard type according to the ratio of Al 2 O 3 / SiO 2. , The high temperature type and the ultra high temperature type are used separately, but may be a new type due to future technological development. The thickness is variously changed depending on the annealing temperature, but it is usually 15 to 40 mm.
【００１０】[0010]
【作用】本発明では、ベースプレート３とスペーサ４の
間に、多数の貫通孔を有するセラミック繊維板を配設す
るようにしたので、ベースプレート３の上反り変形によ
るコイル１下端部での局部支持を、その弾力性を介して
防止できるようになり、同時にコイル１下端部への通気
性が改善されて伝熱が確保されるようになるので、コイ
ル１内の温度勾配が小さくなる。また、単に耳歪の発生
を防止するばかりか、コイル１半径方向の鋼帯層間の圧
縮応力によってコイル１内巻部に発生する凹凸状の形状
欠陥も防止できるようになる。In the present invention, since the ceramic fiber board having a large number of through holes is arranged between the base plate 3 and the spacer 4, local support at the lower end of the coil 1 due to the warp deformation of the base plate 3 is achieved. The elasticity can be prevented, and at the same time, the air permeability to the lower end of the coil 1 is improved and the heat transfer is ensured, so that the temperature gradient in the coil 1 is reduced. Further, not only the occurrence of ear strain can be prevented, but also the uneven shape defect generated in the inner winding portion of the coil 1 due to the compressive stress between the steel strip layers in the radial direction of the coil 1 can be prevented.
【００１１】さらに、本発明では、耳歪がコイル１外巻
部に多く発生する事実に着目して、セラミック繊維板の
貫通孔数をコイル内巻部に多くし、外巻部は主としてセ
ラミックボードにてコイル１を支持するようにしたの
で、耳歪発生の防止効果が促進されるようになる。以
下、図１〜２に基づき、本発明の内容を説明する。図１
（ａ）は、本発明の１例を示す側面図である。そこで
は、インナケース５内のベースプレート３とスペーサ４
の間に、多数の貫通孔を有するセラミック繊維板８が所
謂緩衝材として配設されている。セラミック繊維の特性
として、耐火断熱性に加えて弾力性すなわち被圧縮性、
復元性があることから、ベースプレート３とコイル１と
の熱処理中の膨張、収縮の関係を緩和すると共に、ベー
スプレート３上面とコイル１下面間の平滑性を維持する
のに寄与し、その結果、コイル１下端部の耳歪発生が減
少することは、上述の特開昭５８−６１２３１（特公昭
６２−１５６１５）号公報に記載のとおりである。本発
明は、上記緩衝効果に加えて、その欠点である断熱性を
改良するため、図１（ｂ）に示すように、セラミック繊
維板８に貫通孔９を多数設けているのである。さらに、
本発明の効果を一層促進するため、図２に示すように、
貫通孔９数はコイル１内巻部が外巻部より多くなるよう
にしたのである。Further, in the present invention, attention is paid to the fact that a large amount of ear strain is generated in the outer winding portion of the coil 1, and the number of through holes of the ceramic fiber board is increased in the inner winding portion of the coil, and the outer winding portion is mainly a ceramic board. Since the coil 1 is supported by, the effect of preventing the occurrence of ear distortion is promoted. The contents of the present invention will be described below with reference to FIGS. Figure 1
(A) is a side view showing an example of the present invention. There, there are a base plate 3 and a spacer 4 in the inner case 5.
A ceramic fiber board 8 having a large number of through-holes is arranged between them as a so-called cushioning material. As characteristics of ceramic fiber, in addition to fire insulation, elasticity, that is, compressibility,
Because of the resilience, the relationship between expansion and contraction of the base plate 3 and the coil 1 during heat treatment is relaxed, and it contributes to maintain the smoothness between the upper surface of the base plate 3 and the lower surface of the coil 1. As a result, 1 The reduction of the ear strain at the lower end is reduced as described in JP-A-58-61231 (Japanese Patent Publication No. 62-15615). According to the present invention, in addition to the above-described cushioning effect, in order to improve the heat insulating property, which is a drawback thereof, a large number of through holes 9 are provided in the ceramic fiber board 8 as shown in FIG. 1 (b). further,
In order to further promote the effect of the present invention, as shown in FIG.
The number of through holes is set so that the inner winding portion of the coil 1 is larger than the outer winding portion.
【００１２】なお、本発明に係るセラミック繊維板８
は、実際に使用する便宜を図り、複数に分割してあって
も良い（図２参照）。Incidentally, the ceramic fiber board 8 according to the present invention
May be divided into a plurality of pieces for the convenience of actual use (see FIG. 2).
【００１３】[0013]
【実施例】ステンレス製のベースプレート３と、鋼製の
スペーサ４の間に、嵩密度０．２５ｇ／ｃｍ3 、厚み２
０ｍｍ、開口率４５％のドーナツ状のセラミック繊維板
８を置き、その上に板厚０．３５ｍｍ、幅１０００ｍｍ
で単重１０ｔのコイルを載置し、１１７０℃以上の温度
で焼鈍した。この場合、貫通孔９の施工方法はセラミッ
ク板全面に均一分布をするようにした。[Example] A bulk density of 0.25 g / cm 3 and a thickness of 2 between a stainless steel base plate 3 and a steel spacer 4.
A doughnut-shaped ceramic fiber board 8 with 0 mm and an opening ratio of 45% is placed, and a plate thickness of 0.35 mm and a width of 1000 mm is placed on top of it.
Then, a coil having a unit weight of 10 t was placed and annealed at a temperature of 1170 ° C. or higher. In this case, the method of constructing the through holes 9 was such that the through holes 9 were uniformly distributed over the entire surface of the ceramic plate.
【００１４】次に、同一の寸法及び開口率等の焼鈍条件
を同じにし、中心側の貫通孔９を外周側より２０％増や
したセラミック繊維板８（図２（ｂ））を用いた焼鈍も
行った。比較例としては、同一サイズの条件下で、開孔
率０％（図２（ａ））のセラミック繊維板を用いた従来
法に基づく焼鈍も実施した。表１に耳歪の発生状況の比
較を示す。また表２に凹凸状欠陥の発生状況の比較を示
す。いずれも開孔率４５％の２つの本発明の適用例が良
好な結果を示した。Next, annealing is also performed using the ceramic fiber board 8 (FIG. 2B) in which the annealing conditions such as the same size and opening ratio are the same, and the through holes 9 on the central side are increased by 20% from the outer peripheral side. went. As a comparative example, annealing was also performed based on the conventional method using a ceramic fiber plate having a porosity of 0% (FIG. 2A) under the same size condition. Table 1 shows a comparison of the occurrence of ear strain. In addition, Table 2 shows a comparison of occurrence states of uneven defects. In both cases, two examples of application of the present invention having a porosity of 45% showed good results.
【００１５】また、表３に開孔率１０％、９０％の場合
の結果を示すが、各々において形状欠陥を防止すること
はできなかった。よって２０〜８０％の開孔率が適切で
ある。Table 3 shows the results when the porosity is 10% and 90%, but it was not possible to prevent the shape defect in each case. Therefore, an aperture ratio of 20 to 80% is appropriate.
【００１６】[0016]
【表１】 ──────────────────────────────────── 本発明例 ＊従来例 請求項１ 請求項２ 耳歪発生深さ ４０〜３０ｍｍ ３０〜２０ｍｍ ６０〜５０ｍｍ 長手方向の歪長さ ８００ｍ ５００ｍｍ １０００ｍ ────────────────────────────────────[Table 1] ──────────────────────────────────── Present invention example * Conventional example Claim 1 Claim Item 2 Ear distortion generation depth 40-30 mm 30-20 mm 60-50 mm Longitudinal strain length 800 m 500 mm 1000 m ────────────────────────── ───────────
【００１７】[0017]
【表２】 ──────────────────────────────────── 本発明例 ＊従来例 請求項１ 請求項２ 凹凸個数 １〜２個 ＞１個 ８〜１０個 発生長さ（コイル内巻より） ７０ｍ ４０ｍ ５００ｍ ────────────────────────────────────[Table 2] ──────────────────────────────────── Example of the present invention * Conventional example Claim 1 Claim Item 2 Number of irregularities 1-2 pieces> 1 piece 8-10 pieces Generation length (from coil inner winding) 70m 40m 500m ─────────────────────── ─────────────
【００１８】[0018]
【表３】 ──────────────────────────────────── 開孔率９０％ 開孔率１０％ 耳歪発生深さ ６０〜５０ｍｍ ５０〜３０ｍｍ 凹凸発生長さ ７０ｍ ４５０ｍ ──────────────────────────────────── ＊ここで従来例とは特開昭５８−６１２３１である。[Table 3] ──────────────────────────────────── Opening rate 90% Opening rate 10% Ear distortion depth 60 to 50 mm 50 to 30 mm Concavity and convexity length 70 m 450 m ────────────────────────────────── --- * Here, the conventional example is JP-A-58-61231.
【００１９】[0019]
【発明の効果】以上に述べたように、本発明は、ベース
プレートの上反り変形の影響を断ち、コイル内温度勾配
を小さくすることにより、耳歪の発生を防止しかつ凹凸
状の欠陥も防止できるので製品の歩留りを向上させるこ
とができる。As described above, according to the present invention, the influence of the warp deformation of the base plate is eliminated, and the temperature gradient in the coil is reduced, thereby preventing the occurrence of ear distortion and the uneven defect. Therefore, the product yield can be improved.
【図１】（ａ）は本発明に係る焼鈍装置例の縦断面図で
あり、（ｂ）はセラミック繊維板の貫通孔配置例であ
る。FIG. 1A is a vertical cross-sectional view of an example of an annealing apparatus according to the present invention, and FIG. 1B is an example of through-hole arrangement in a ceramic fiber board.
【図２】（ａ）特開昭５８−６１２３１号公報に記載さ
れた分割できるセラミック繊維板の平面図であり、
（ｂ）は本発明の１例である。FIG. 2 (a) is a plan view of a divisible ceramic fiber board described in Japanese Patent Laid-Open No. 58-61231.
(B) is one example of the present invention.
【図３】（ａ）従来からある焼鈍装置の縦断面図であ
り、（ｂ）は耳歪の発生状況を示し、（ｃ）は耳歪がコ
イルの長手方向に生じて、深さもあることを示す図であ
る。3 (a) is a vertical cross-sectional view of a conventional annealing apparatus, (b) shows a state of ear strain generation, and (c) shows that ear strain is generated in the longitudinal direction of the coil and has a depth. FIG.
１ コイル ２ 支持金物 ３ ベースプレート ４ スペーサ ５ インナケース ６ 炉床 ７ 加熱用ヒータ ８ セラミック繊
維板 ９ 貫通孔1 Coil 2 Support Hardware 3 Base Plate 4 Spacer 5 Inner Case 6 Hearth 7 Heating Heater 8 Ceramic Fiber Board 9 Through Hole
Claims (2)
向性珪素鋼帯コイルをアップエンド状に載置して加熱、
冷却する焼鈍装置において、上記ベースプレートとスペ
ーサの間に、多数の貫通孔を有するセラミック繊維板を
配設したことを特徴とする方向性珪素鋼の焼鈍装置。1. A directional silicon steel strip coil is placed in an up-end shape on a spacer laid on a base plate and heated,
In a cooling annealing device, a directional silicon steel annealing device is characterized in that a ceramic fiber plate having a large number of through holes is arranged between the base plate and the spacer.
心側で密、外周側で粗としたことを特徴とする請求項１
記載の方向性珪素鋼の焼鈍装置。2. The number of through holes is dense on the center side of the ceramic fiber board and coarse on the outer peripheral side.
An annealing apparatus for the directional silicon steel described.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5210505A JP2777320B2 (en) | 1993-08-25 | 1993-08-25 | Oriented silicon steel annealing equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5210505A JP2777320B2 (en) | 1993-08-25 | 1993-08-25 | Oriented silicon steel annealing equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0762453A true JPH0762453A (en) | 1995-03-07 |
| JP2777320B2 JP2777320B2 (en) | 1998-07-16 |
Family
ID=16590482
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5210505A Expired - Fee Related JP2777320B2 (en) | 1993-08-25 | 1993-08-25 | Oriented silicon steel annealing equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2777320B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101354937B1 (en) * | 2011-12-15 | 2014-01-22 | 주식회사 포스코 | Base plate of heat-treatment apparatus for annealing |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5235292U (en) * | 1975-09-03 | 1977-03-12 | ||
| JPS6215615A (en) * | 1985-07-15 | 1987-01-24 | S P Planning:Kk | Power controller |
| JPH01230728A (en) * | 1988-03-10 | 1989-09-14 | Nkk Corp | Convection plate for cooling coil |
-
1993
- 1993-08-25 JP JP5210505A patent/JP2777320B2/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5235292U (en) * | 1975-09-03 | 1977-03-12 | ||
| JPS6215615A (en) * | 1985-07-15 | 1987-01-24 | S P Planning:Kk | Power controller |
| JPH01230728A (en) * | 1988-03-10 | 1989-09-14 | Nkk Corp | Convection plate for cooling coil |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2777320B2 (en) | 1998-07-16 |
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