JPH04105758A - Method for expanding width of mold in continuously casting - Google Patents
Method for expanding width of mold in continuously castingInfo
- Publication number
- JPH04105758A JPH04105758A JP22605290A JP22605290A JPH04105758A JP H04105758 A JPH04105758 A JP H04105758A JP 22605290 A JP22605290 A JP 22605290A JP 22605290 A JP22605290 A JP 22605290A JP H04105758 A JPH04105758 A JP H04105758A
- Authority
- JP
- Japan
- Prior art keywords
- taper
- short side
- width
- stage
- mold
- 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
- 238000005266 casting Methods 0.000 title claims abstract description 7
- 238000000034 method Methods 0.000 title claims description 17
- 238000012937 correction Methods 0.000 claims abstract description 21
- 238000009749 continuous casting Methods 0.000 claims abstract description 19
- 230000005499 meniscus Effects 0.000 claims abstract description 8
- 238000005728 strengthening Methods 0.000 claims description 6
- 230000008859 change Effects 0.000 abstract description 16
- 230000002787 reinforcement Effects 0.000 description 11
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 230000009467 reduction Effects 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 201000004569 Blindness Diseases 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000009529 body temperature measurement Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は連続鋳造時における鋳型幅拡大方法に係り、詳
しくは、連続鋳造中に鋳型短辺を移動させ鋼片幅を拡大
する連続鋳造時における鋳型幅拡大方法に係る。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a method for expanding the width of a mold during continuous casting, and more particularly, to a method for expanding the width of a steel billet during continuous casting by moving the short side of the mold during continuous casting. This relates to the width expansion method.
従来の技術
近年、綱の達＠鋳造においては稼動率ならびに鋳片歩留
の向上等のために鋳型への鋳込を停止することなく鋳片
幅の変更を行なう連続鋳造法が実施されるようになった
。なかでも、連続鋳造工程と圧延工程を直結する方法が
実用化され、製品板幅に応じて連続鋳造中の鋳片幅を変
更することが要望されている。Conventional technology In recent years, continuous casting methods have been implemented in Tsuna no Tatsu @ casting, in which the width of the slab can be changed without stopping pouring into the mold, in order to improve the operating rate and slab yield. Became. Among them, a method of directly linking the continuous casting process and the rolling process has been put into practical use, and there is a demand for changing the width of the slab during continuous casting according to the width of the product plate.
連続鋳造機の運転を止めずに鋳片幅を変更する場合、幅
が変化する部分の長さをできるだけ短か（し、要求され
る幅に直ちに変更することが重要で、このため、幅変更
速度を上昇させることが必要である。When changing the width of a slab without stopping the continuous casting machine, it is important to keep the length of the part where the width changes as short as possible (and to immediately change it to the required width. It is necessary to increase the speed.
このような連続鋳造に用いられるＢｉｔについて第７図
により説明する。The Bit used in such continuous casting will be explained with reference to FIG.
第７図は鋳型長辺を固定し短辺を移動させる幅変更装置
の一例を概念的に示す説明図である。FIG. 7 is an explanatory diagram conceptually showing an example of a width changing device that fixes the long sides of the mold and moves the short sides.
すなわち、一対の短辺１ａ、１ｂが図示しない＃Ｈ型振
動テーブルに固定された長辺２ａ、２ｂに挾持され、短
辺に取付けられた電動若しくは油圧式の駆動装Ｍ３ａ、
３ｂにより駆動され、鋳片４の幅を鋳造を止めることな
く変更するようにしたものである。このような装置によ
り幅変更速度を高速化すると、短辺を駆動する力の増加
ならびに鋳片欠陥の発生等があり、このことが幅変更の
高速化を明んでいた。That is, a pair of short sides 1a and 1b are held between long sides 2a and 2b fixed to a #H type vibration table (not shown), and an electric or hydraulic drive device M3a is attached to the short sides,
3b, and the width of the slab 4 can be changed without stopping casting. When the speed of width change is increased using such a device, the force for driving the short side increases and defects occur in the slab, which makes it clear that the speed of width change is increased.
従来の幅変更方法とし７では、例えば、特開昭６０−６
８１３７号公報記載の如（、短辺の幅縮少区間を前傾、
平行移動、後傾に区分し、各期間において短辺移動速度
へ上部と下部を変更し、鋳片幅を縮少する方法、また、
特開昭６１）１５６５６号公報記載の如く、短辺の＠縮
少区間を前傾、後傾に区分し、各期間における短辺上下
端部の水平方向移動速度の増速率を許容シェル変更抵抗
力のパラメータとして求めるとともに上下端部の速度差
を式によって定め、増速率ならびに速度差を一定に維持
して幅変更を行なう方法、また、特開昭６１−１３７６
５９号公報記載の如く、幅変更開始時と終了時のテーパ
の違いによる誤差を前傾と後傾の間に平行期間をおいて
吸収する方法、また、特開昭６１）４４２５５号公報に
記載の如（、圧延条件およびパまたは短辺駆動装置の制
約条件により炉辺の最大許容移動速度ｖｍａｘを設定し
、幅変更の前傾または後傾における短辺の上端部速度Ｖ
が最大許容移動速度Ｖｍａｘを越えるようになったとき
、幅変更前半部と後半部との間に特定範囲の移動速度Ｖ
ｐで短辺を平行移動する方法等がある。In the conventional width changing method 7, for example, JP-A-60-6
As described in Publication No. 8137 (, the width reduction section of the short side is tilted forward,
A method of dividing into parallel movement and backward tilting, changing the upper and lower parts to the short side movement speed in each period, and reducing the width of the slab,
As described in Japanese Patent Application Laid-open No. 15656 (1981), the @ reduction section of the short side is divided into forward tilting and backward tilting, and the rate of increase in the horizontal movement speed of the upper and lower ends of the short side in each period is determined by the allowable shell change resistance. A method in which the force is determined as a parameter and the speed difference between the upper and lower ends is determined by a formula, and the width is changed while maintaining the speed increase rate and the speed difference constant.
As described in Japanese Patent Laid-open No. 59, there is a method of absorbing the error due to the difference in taper at the start and end of width change by providing a parallel period between forward and backward tilts, and also described in Japanese Patent Application Laid-Open No. 1983-44255. As shown below, the maximum permissible moving speed vmax of the hearth is set according to the rolling conditions and the constraints of the roller or short side drive device, and the upper end speed V of the short side when the width is changed forward or backward is set.
exceeds the maximum allowable movement speed Vmax, the movement speed V within a specific range between the first half and the second half of the width change
There are methods such as moving the short side in parallel with p.
しかしながら、これらは一応鋳片幅を変更する方法とし
ては有効であるが、幅変更時間、鋳片幅変更部の長さな
らびに要求される幅に移行する速度が十分でなく、また
、移行する速度を高めるとブレークアウトが発生し、幅
変更設備能力を最大限に活用できるものではないという
問題があった。However, although these methods are effective as methods for changing the slab width, the width changing time, the length of the slab width changing part, and the speed at which the width changes to the required width are insufficient, and the speed at which the width changes is insufficient. There was a problem that if the width was increased, a breakout would occur, and the capacity of the width changing equipment could not be utilized to its fullest extent.
発明が解決しようとする課題
本発明は上記問題の解決を目的とし、置体的には、幅変
更に要するＷ＃間を最少とし、かつブレークアウト等の
トラブルを引き起こさない連続鋳造時における鋳型幅拡
大方法を提案することを目的とする。Problems to be Solved by the Invention The present invention aims to solve the above-mentioned problems, and aims to minimize the W# distance required for changing the width, and to improve the mold width during continuous casting without causing troubles such as breakouts. The purpose is to propose an expansion method.
課題を解決するための
手段ならびにその作用
すなわら、本発明は、連続鋳造の鋳型幅を拡大する際に
、幅拡大をテーパ強化用とテーパ修正明に２分し、
テーパ強化用は、
を満たしつつ、
テーパ修正期は、
を満たしつつ、短辺を移動させ、しかも、テパ強化の初
期では、短辺上端のみを用いてテバ強化し、テーパ修正
の末期では短辺下端のみを用いてテーパ修正することを
特徴とする。Means for Solving the Problems and Their Effects According to the present invention, when expanding the mold width for continuous casting, the width expansion is divided into two for taper reinforcement and taper correction, and for taper reinforcement, In the taper correction period, the short side is moved while satisfying , and in the early stage of taper strengthening, the taper is strengthened using only the upper end of the short side, and in the final stage of taper correction, the taper is strengthened using only the lower end of the short side. It is characterized by correction.
但し、上記の式中の記号は次のものを示す。However, the symbols in the above formula represent the following.
ｖｕ：短辺上端の移動速度
■Ｑ：短辺下端の移動速度
ＶＣ：鋳造速度
１ｍ：メニスカス部と短辺下ｓｉ間の距離θ！、θ２
：歪訂容側
α盲、α２ ：定数
β１、β２ ：定数
Ｔ：テーパ量
以Ｔ、本発明の手段たる構成ならびにその作用について
説明すると、次の通りである。vu: Moving speed of the upper end of the short side ■Q: Moving speed of the lower end of the short side VC: Casting speed 1 m: Distance between the meniscus part and the lower short side si! , θ2
: Strain correction side α blindness, α2 : Constant β1, β2 : Constant T : Taper amount T. The structure of the means of the present invention and its operation will be explained as follows.
本発明者等は鋳型幅変更時間短縮について検討したとこ
ろ、例えば従来技術で説明した特開昭６１−１）５６５
６号公報に記載された幅拡大方法において、幅拡大の最
初に短辺下端を縮少す向に移動させる期間ならびに幅拡
大のＩ後に短辺上端を縮少方向に移動させる期間が存在
し、幅変更時間短縮の妨げとなっていることがわかった
。The present inventors have studied how to shorten the mold width changing time, and found that, for example, in Japanese Patent Application Laid-Open No. 61-1) 565, which was explained in the prior art.
In the width expanding method described in Publication No. 6, there is a period in which the lower end of the short side is moved in the direction of reduction at the beginning of width expansion, and a period in which the upper end of the short side is moved in the direction of reduction after I of width expansion, It was found that this was an obstacle to shortening the width change time.
更に進んで研究開発を行ない、この研究に基づいて本発
明は成立したものである。Further research and development was conducted, and the present invention was established based on this research.
本発明者等の研究結果によれば、鋳型メニスカス部の凝
固シェルの変形能を使用すればルクアウト等を発生する
ことなく第１図（ａ）、（ｂ）ならびに（Ｃ）の実線で
示すように短辺が移動し、その上端、［とも短ｆＲ間で
移動角能となり、幅拡大時の時間短縮することができる
。According to the research results of the present inventors, if the deformability of the solidified shell of the mold meniscus is used, look-out etc. will not occur and the result will be as shown by the solid lines in Fig. 1 (a), (b) and (C). The short side moves between the upper end and the short fR, which reduces the time required to widen the width.
以下、更に詳しく本発明を説明する。The present invention will be explained in more detail below.
ｒ記（１）〜（４）式の基礎式に従って短辺移動をテー
パ強化期間とテーパ修正期間とに２分し、それぞれの移
動速度が求められる。According to the basic equations (1) to (4) in R, the short side movement is divided into a taper reinforcement period and a taper correction period, and the movement speed of each is determined.
テーパ強化期間
デーパ修正期間
但し、Ｖｕ：短辺上端の移動速度、■Ｑ：短辺下端の移
動速度、Ｖｃ ：Ｉ造速度、！ｍ：メニスカス部と短辺
Ｔ：端までの距離、θ、：メニスカス部歪許容−１θ２
：短辺上端歪訂容鰯、Ｔ（ｔ）：メニスカス部と短辺
下端との短辺テバー、φ、ψ：鋳片凝固シェルの静鉄圧
による変形速度を示すパラメータである。Taper reinforcement period Taper correction period However, Vu: Movement speed of the upper end of the short side, Q: Movement speed of the lower end of the short side, Vc: I construction speed, ! m: distance between meniscus part and short side T: end, θ,: meniscus part distortion tolerance -1θ2
: Strain correction at the upper end of the short side, T(t): Short side tension between the meniscus portion and the lower end of the short side, φ, ψ: Parameters indicating the deformation rate of the solidified slab shell due to static iron pressure.
（１）式のφは次のく５）式により求められる。φ in equation (1) is obtained from equation 5 below.
を得る。get.
但し、
なお、Ｅｏは１４６図ｆａ）ならヒＬ：（ｂ）Ｌ−示す
ように静鉄圧による鋳片変形量、μは短辺移動角度を表
し、これをＣＯＳμで除すことにより、短辺移動速度の
増分が与えられる。However, if Eo is Fig. 146 fa) then HiL: (b) L- As shown, the amount of slab deformation due to static iron pressure, μ represents the movement angle of the short side, and by dividing this by COSμ, The increment of edge movement speed is given.
（４）式のψは次の（６）式により同様に求められる。ψ in equation (4) can be similarly determined using equation (6) below.
（１）、 （２） 、 （３） 、 （４） 、 （５
） 、（６）の各式より
をホす。(1), (2), (3), (4), (5
) and (6).
本発明者等は幅拡大について更に賓験を重ねた結果、幅
拡大の初期では（１）’ （２）の式を満たしてい
なくてもトラブルがない。The inventors of the present invention have further experimented with widening the width, and as a result, there is no problem even if the formulas (1)' and (2) are not satisfied in the initial stage of width expansion.
そこで、
Ｖｕ＝Ｖｕ＋ −＝ ＋ ７ ＞ＶＱ＝Ｏ・・・
・・・ （８）
を満たすことにより、テーパ―をＴｌｏまで強化できる
ことがわかった。Therefore, Vu=Vu+ −= + 7 >VQ=O...
... It was found that by satisfying (8), the taper can be strengthened to Tlo.
これにより、（１）’ （２）’ にみられるよう
なＶｓ＋＜Ｏの期間をなくすことができる。As a result, the period of Vs+<O as seen in (1)'(2)' can be eliminated.
また、幅拡大の後半末期では、
Ｖμｍ０ ・・・・・・（９）レークアウト予
知レベル以上の変化を示すことがあり、パラメータを慎
重に決める必要がある。In addition, at the end of the second half of the width expansion, Vμm0 (9) may show a change that exceeds the lakeout prediction level, so it is necessary to carefully determine the parameters.
第 １ 表 を満足すればよいことがわかった。Table 1 It turns out that you only have to satisfy the following.
また、
Ｖμ−〇 ・・・・・・ （１））Ｖｏ ＝ Ｖ
Ｒ２−−（１２１
でも良い結果を得られることもあるが、プレクアウト（
Ｂ％Ｏ）を引き起こす例もある。Also, Vμ−〇 ・・・・・・ (1)) Vo = V
R2--(121 may also get good results, but pre-kout (
In some cases, it causes B%O).
従って、（９）、（１０）式の方が好ましい。Therefore, formulas (9) and (10) are preferable.
第２図は短辺移動速度と短辺銅板温度変化指数との関係
を示すブレークアウト予知用銅板測温データであり、図
中の記号を第１表に示した。FIG. 2 shows the copper plate temperature measurement data for breakout prediction showing the relationship between the short side moving speed and the short side copper plate temperature change index, and the symbols in the figure are shown in Table 1.
図面から見ると（７）、（８）式および（９）、（１０
）式のときはまったく問題なく、幅変更も行なっていな
い定常部との差が認められない。From the drawing, equations (7) and (8) and (9) and (10
), there is no problem at all, and no difference can be seen from the steady part where no width change has been made.
従って、エアーギャップの生成もなく、鋳片に過大な変
形を強いることもないと言える。Therefore, it can be said that there is no generation of air gaps and no excessive deformation is forced on the slab.
しかし、（１））、（１２）式のときは、ブ以五更に本
発明の詳細な説明する。However, in the case of formulas (1)) and (12), the present invention will be further explained in detail from section 5 onwards.
鋳型の幅拡大の期間をテーパ強化用とテーパ修正期に分
け、さらにそれぞれを前半、後半に分け、下記のように
短辺を移動させると幅拡大時における時間が短縮される
。If the mold width expansion period is divided into a taper strengthening period and a taper correction period, each of which is further divided into a first half and a second half, and the short sides are moved as shown below, the time during width expansion will be shortened.
テーパ強化用前半＋ Ｔ ＋ Ｔ １ｏ ＋Ｔ ｃ）ま
で）Ｖμ−ＶｕＩ ・・・・・・（１３ン
Ｖｐ−○ ・・・・・・（１４）
テーパ強化用後半ｆ（１Ｊ’ 、 （２１’式を解く）
θ１−θ、十β＋ 、１＝０はテーパ強化用後半の開始
時刻を示す。First half for taper reinforcement + T + T 1o + T c)) Vμ-VuI ...... (13n Vp-○ ...... (14) Second half for taper reinforcement f (1J', (21') solve the equation)
θ1−θ, 1β+, 1=0 indicates the start time of the second half for taper reinforcement.
テーパ修正期前半ｆ（３１’ 、 ｔ４＋’式を解（）
θ２＝θ２＋β２ 、ｉ＝０はテーパ修正期前半の開始
時刻を示す。Solve the equation for the first half of the taper correction period f(31', t4+' ()
θ2=θ2+β2, i=0 indicates the start time of the first half of the taper correction period.
テーパ修正期後半（（９）、（１０）式を解く）以上に
より短辺移動速度パターンとして第３図に示す時間と短
辺移動速度との関係を示すグラフが得られ、この図面に
示すように短辺移動速度が短縮される。The second half of the taper correction period (solving equations (9) and (10)) As a result of the above, a graph showing the relationship between time and short side moving speed shown in Figure 3 is obtained as a short side moving speed pattern, and as shown in this drawing. The short side movement speed is shortened.
なお、鋳型幅拡大の短辺移動を第５図に示すようにテー
パ強化用前半をｎ段とし、テーパ修正期後半をｍ段とし
てもよい。In addition, as shown in FIG. 5, the short side movement for widening the mold width may be performed in n steps for the first half of the taper reinforcement period, and m steps for the second half of the taper correction period.
実施例］。Example].
連続鋳造時において鋳型幅拡大する際に、鋳型短辺の幅
変更歯△Ｗ＝３００ｍ＋＜両短辺で１５０胴の幅変更）
、鋳込速度ＶＣ＝１．５ｍ分、モールド艮ｌｍ＝９００
−に対して下記の条件で行なった例を示す。なお、（５
）、（６）式のＥＤ、Ｅ’ ｌ）は実験的に求めた結
束で与えた。When expanding the mold width during continuous casting, the width change tooth on the short side of the mold △W = 300m + <150 cylinder width change on both short sides)
, casting speed VC = 1.5 m, mold length lm = 900
An example is shown below under the following conditions. In addition, (5
), ED and E'l) in equation (6) are given by experimentally determined unity.
Ｖμ、＝１Ｑｓ、・分 子１ｏ＝１０１）１ α盲 −０，００２ β 瞥 ＝６ｗ 分 α２＝０．００１ β２＝３−分 θ＋ ＝ １５１）１．・分 θ２＝１２■・′分 この結束を第４図に示した。Vμ,=1Qs,・min Child 1o=101)1 α-blindness -0,002 β glance = 6w minutes α2=0.001 β2=3-min θ+=151)1.・Minutes θ2=12■・'min This binding is shown in Figure 4.
（発明の効宋〕
以上詳しく説明したように、本発明は、連続鋳造の麟型
幅を拡大する際に、幅拡大をテーパ強化用とテーパ修正
期に２５ｆし、
テーパ強化用は、
を満たしつつ、
テーパ修正期は、
を満たしつつ、短辺を移動させ、しがち、前記テーパ強
化の初期では、短辺上端のみを用いてテーパ強化し、前
記テーパ修正の末期では短辺下端のみを用いてテーパ修
正することを特徴とする。(Effects of the invention) As explained in detail above, the present invention, when expanding the width of the mold for continuous casting, expands the width by 25f for taper reinforcement and in the taper correction period, and for taper reinforcement, satisfies the following. However, during the taper correction period, the short side tends to be moved while satisfying The feature is that the taper is corrected.
但し、上記の式中の記号は次のものを示す。However, the symbols in the above formula represent the following.
ＶＵ：短辺上端の移動速度
ＶＱ：短辺下端の移動速度
ＶＣ：鋳造速度
１ｍ；メニスカス部と短辺下端間の距離０１、θ？ ：
歪許容量
α１、α２ ：定数
β１、β２ ：定数
Ｔ：テーパ量
本発明によれば、連続鋳造の鋳型短辺幅を拡大する際に
、テーパ強化用とテーパ修正期とに２分し、各期間にお
いて定められる条件を満すように短辺を移動させ、かつ
テーパ強化初期では短辺上端のみを用い、テーパ修正末
期では短辺下端のみを用いてテーパを修正するようにし
たため、幅変更に要する時間を最小とすることができる
と共に、ブレークアウト等のトラブルを引き起こさず、
幅変更能力を最大限に活用することができる。VU: Moving speed of the upper end of the short side VQ: Moving speed of the lower end of the short side VC: Casting speed 1 m; Distance between the meniscus part and the lower end of the short side 01, θ? :
Strain tolerance α1, α2: Constant β1, β2: Constant T: Taper amount According to the present invention, when expanding the width of the short side of the mold in continuous casting, the mold is divided into two periods: one for strengthening the taper and one for correcting the taper. The short side was moved to satisfy the conditions specified in the period, and the taper was corrected by using only the top end of the short side at the beginning of taper reinforcement, and only the bottom end of the short side at the end of taper correction, so it was not necessary to change the width. Not only can the time required be minimized, but it also does not cause troubles such as breakouts.
You can take full advantage of the ability to change the width.
第１図（ａ）、（ｂ）ならびに（Ｃ）はそれぞれ連続鋳
ｉｉ！ｉ時における鋳型短辺の移動状況を示し、（ａ）
は拡大前、（ｂ）は上端移動時、（Ｃ）は拡大後の各断
面の説明図、第２図は本発明の芙施例の短辺移動速度と
短辺銅板温度変化指数との関係を示すグラフ、第３図は
本発明の短辺移動速度パターンのグラフ、第４図は本発
明の一つの寅施例を示すグラフ、第５図は第３図の短辺
移動速度パターンの変形のグラフ、第６図（ａ）ならび
に（ｂ）はそれぞれ本発明の幅拡大時における短辺上端
の水平方向の移動状態を示し、（ａ）は断面図、（ｂ）
は（ａ）の一部拡大断面図、第７図は連続鋳造装置の説
明図である。Figures 1 (a), (b) and (C) are respectively continuous casting ii! The movement status of the short side of the mold at time i is shown, (a)
is before enlargement, (b) is when the upper end is moved, (C) is an explanatory diagram of each cross section after enlargement, and Fig. 2 is the relationship between the short side moving speed and the short side copper plate temperature change index of the embodiment of the present invention. 3 is a graph of the short side moving speed pattern of the present invention, FIG. 4 is a graph showing one embodiment of the present invention, and FIG. 5 is a modification of the short side moving speed pattern of FIG. 3. The graphs in FIGS. 6(a) and 6(b) respectively show the movement state of the upper end of the short side in the horizontal direction when the width of the present invention is expanded, and (a) is a cross-sectional view, and FIG. 6(b) is a cross-sectional view.
is a partially enlarged cross-sectional view of (a), and FIG. 7 is an explanatory diagram of the continuous casting apparatus.
Claims (1)
強化期とテーパ修正期に２分し、テーパ強化期は、 Ｖｕ＝（Ｖｃ）／（ｌｍ）（１＋α＿１）Ｔ＋β＿１Ｖ
＿ｌ＝（Ｖｃ）／（ｌｍ）Ｔ−θ＿１ を満たしつつ、テーパ修正期は、 Ｖｕ＝（Ｖｃ）／（ｌｍ）Ｔ−θ＿２ Ｖ＿ｌ＝（Ｖｃ）／（ｌｍ）（１＋α＿２）Ｔ＋β＿２
を満たしつつ、短辺を移動させ、しかも、前記テーパ強
化の初期では、短辺上端のみを用いてテーパ強化し、前
記テーパ修正の末期では短辺下端のみを用いてテーパ修
正することを特徴とする連続鋳造時における鋳型幅拡大
方法。 但し、上記の式中の記号は次のものを示す。 Ｖｕ：短辺上端の移動速度 Ｖ＿ｌ：短辺下端の移動速度 Ｖｃ：鋳造速度 ｌｍ：メニスカス部と短辺下端間の距離 θ＿１、θ＿２：歪許容量 α＿１、α＿２：定数 β＿１、β＿２：定数 Ｔ：テーパ量[Claims] 1) When expanding the mold width for continuous casting, the width expansion is divided into a taper strengthening period and a taper correction period, and the taper strengthening period is as follows: Vu=(Vc)/(lm)(1+α_1 )T+β_1V
While satisfying __l=(Vc)/(lm)T-θ_1, the taper correction period is as follows: Vu=(Vc)/(lm)T-θ_2 V_l=(Vc)/(lm)(1+α_2)T+β_2
The short side is moved while satisfying the following, and furthermore, in the initial stage of the taper strengthening, the taper is strengthened using only the upper end of the short side, and in the final stage of the taper correction, the taper is corrected using only the lower end of the short side. Method for expanding mold width during continuous casting. However, the symbols in the above formula represent the following. Vu: Moving speed of the upper end of the short side V_l: Moving speed of the lower end of the short side Vc: Casting speed lm: Distance between the meniscus part and the lower end of the short side θ_1, θ_2: Strain tolerance α_1, α_2: Constant β_1, β_2: Constant T: Taper amount
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22605290A JP2913114B2 (en) | 1990-08-28 | 1990-08-28 | Method of expanding mold width during continuous casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22605290A JP2913114B2 (en) | 1990-08-28 | 1990-08-28 | Method of expanding mold width during continuous casting |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04105758A true JPH04105758A (en) | 1992-04-07 |
| JP2913114B2 JP2913114B2 (en) | 1999-06-28 |
Family
ID=16839041
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22605290A Expired - Fee Related JP2913114B2 (en) | 1990-08-28 | 1990-08-28 | Method of expanding mold width during continuous casting |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2913114B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110947924A (en) * | 2018-09-27 | 2020-04-03 | 上海宝信软件股份有限公司 | On-line thermal width adjusting method suitable for crystallizer |
-
1990
- 1990-08-28 JP JP22605290A patent/JP2913114B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110947924A (en) * | 2018-09-27 | 2020-04-03 | 上海宝信软件股份有限公司 | On-line thermal width adjusting method suitable for crystallizer |
| CN110947924B (en) * | 2018-09-27 | 2021-07-20 | 上海宝信软件股份有限公司 | On-line thermal width adjusting method suitable for crystallizer |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2913114B2 (en) | 1999-06-28 |
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