JPH0362495A - Induction heating device of steel plate edge - Google Patents
Induction heating device of steel plate edgeInfo
- Publication number
- JPH0362495A JPH0362495A JP19819489A JP19819489A JPH0362495A JP H0362495 A JPH0362495 A JP H0362495A JP 19819489 A JP19819489 A JP 19819489A JP 19819489 A JP19819489 A JP 19819489A JP H0362495 A JPH0362495 A JP H0362495A
- Authority
- JP
- Japan
- Prior art keywords
- steel plate
- heating coil
- heating
- induction heating
- edge parts
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000010438 heat treatment Methods 0.000 title claims abstract description 73
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 69
- 239000010959 steel Substances 0.000 title claims abstract description 69
- 230000006698 induction Effects 0.000 title claims description 22
- 238000005096 rolling process Methods 0.000 description 4
- 230000007423 decrease Effects 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
Landscapes
- General Induction Heating (AREA)
Abstract
Description
本発明は、搬送装置上を所定速度で搬送される圧延鋼板
の両エツ′ジ部を均一に加熱する鋼板エツジの誘導加熱
装置に関する。The present invention relates to an induction heating device for the edge of a steel plate that uniformly heats both edges of a rolled steel plate that is conveyed at a predetermined speed on a conveying device.
一般に、「ホットストリップミルライン」と呼ばれる鋼
板の圧延工程においては、鋼板エツジ部の温度低下が問
題となっている。即ち、粗圧延機から送り出された鋼板
は、ローラテーブル等の搬送装置による搬送中に温度が
徐々に低下するが、特に鋼板の両エツジ部の温度低下が
早く、鋼板の中央部あるいはその近傍部との温度差が大
きくなる。もし、そのままの状態で、鋼板が次の工程で
ある仕上圧延工程に送られ圧延が行われると、鋼板の幅
方向の材質を一定に保つことが困難である。
この問題は、鋼板のエツジ部の温度低下を防止すること
ができればある程度解決できるため、搬送途中の鋼板の
エツジ部を加熱する方法が提案された。誘導加熱装置は
その１例であり、はぼコ字形状に構成されて搬送方向に
直交して鋼板の幅方向両側に配設される。この状態で、
鋼板のエツジ部を加熱するものであるが、搬送中の鋼板
は必ずしも整然とまっすぐに送られる訳ではなく、不可
避的に左右方向に蛇行しながら搬送されてくるので、加
熱むらができたりする。そのため、鋼板の蛇行状態を蛇
行検出装置によって検出し、この蛇行に追従して移動し
ながら加熱する誘導加熱装置が提案されている。その−
例として、特開昭５３−１４１１３号（！ｌ！ｉ！帯の
誘導加熱装置〉が挙げられる。
この発明によれば、搬送される銅帯の両開に誘導加熱装
置を設けておいて、更に、この誘導加熱装置は、搬送方
向と直交する方向に移動可能な台車と一体的に連結され
ている。この台車には位置検出器（蛇行検出器）が取付
けられていて、一方、台車は、この台車を移動させる油
圧シリンダに連結されている。このような構成において
、搬送される銅帯は、左右の蛇行を位置検出器で検出さ
れる。検出された検出値は油圧シリンダの制御信号とし
て反映され、該油圧シリンダのピストンの摺動によって
台車が移動される。この発明は、このように、鋼帯の縁
部と誘導加熱装置との距離を常に同一に保って、正確な
加熱を行おうとするものである。
又、他の例として、特開昭５Ｏ−１６０１１０（ＩＩ４
板エツジの誘導加熱装置）が挙げられる。この発明も、
鋼板エツジと加熱コイルとの距離を検出する距離検出器
を設け、この距離検出器からの入力信号を受けた移動機
構が加熱コイルを移動させて、加熱コイルと鋼エツジと
の間の距離を調整するものである。Generally, in a steel sheet rolling process called a "hot strip mill line," a temperature drop at the edge of the steel sheet is a problem. In other words, the temperature of a steel plate sent out from a rough rolling mill gradually decreases while being transported by a conveying device such as a roller table, but the temperature decreases particularly quickly at both edges of the steel plate, and at the center of the steel plate or its vicinity. The temperature difference between the If the steel plate is sent to the next finish rolling process and rolled in that state, it is difficult to keep the material quality of the steel plate constant in the width direction. This problem can be solved to some extent if the temperature drop at the edge of the steel plate can be prevented, so a method has been proposed in which the edge of the steel plate is heated during transportation. An example of such an induction heating device is an induction heating device, which is configured in a box-shaped configuration and is disposed on both sides of the steel plate in the width direction, perpendicular to the conveyance direction. In this state,
This heats the edges of the steel plate, but the steel plate being transported is not necessarily fed in an orderly straight line, but inevitably winds in the left and right directions, resulting in uneven heating. Therefore, an induction heating device has been proposed that detects the meandering state of a steel plate using a meandering detection device and heats the steel plate while moving while following the meandering. That-
An example is JP-A No. 53-14113 (Induction heating device for !l!i! band). According to this invention, induction heating devices are provided on both sides of the copper strip being conveyed. Furthermore, this induction heating device is integrally connected to a cart movable in a direction perpendicular to the conveyance direction.A position detector (meandering detector) is attached to this cart; , is connected to a hydraulic cylinder that moves this trolley. In this configuration, the left and right meandering of the copper strip being conveyed is detected by a position detector. The detected value is a control signal for the hydraulic cylinder. The carriage is moved by the sliding movement of the piston of the hydraulic cylinder.This invention thus enables accurate heating by always keeping the distance between the edge of the steel strip and the induction heating device the same. Another example is Japanese Patent Application Laid-Open No. 50-160110 (II4).
(plate edge induction heating device). This invention also
A distance detector is provided to detect the distance between the steel plate edge and the heating coil, and a moving mechanism that receives an input signal from the distance detector moves the heating coil to adjust the distance between the heating coil and the steel edge. It is something to do.
しかしながら、上記従来の技術によれば、蛇行しながら
搬送される鋼板エツジに誘導加熱装置を追従させ、常に
両者の距離を一定に保つためには、鋼板エツジと誘導加
熱装置との距離を検出する位置検出装置（蛇行検出器Ｍ
）を必要とする。そのため、経費が掛り経済的にも不利
である。又、装置も複雑化されるという問題点があった
。
本発明は、以上のような問題点を解決しようとして提案
されてものであって、その目的は、位置検出器なしの簡
単な装置で、蛇行する鋼板エツジに追従して誘導加熱装
置を移動することができ、従って、鋼板のエツジを常に
均一に加熱することのできる鋼板エツジの誘導加熱装置
を提供することである。However, according to the above-mentioned conventional technology, in order to make the induction heating device follow the steel plate edge that is being conveyed in a meandering manner and to always keep the distance between the two constant, it is necessary to detect the distance between the steel plate edge and the induction heating device. Position detection device (Meandering detector M
) is required. Therefore, it is expensive and economically disadvantageous. Further, there is a problem that the device becomes complicated. The present invention was proposed to solve the above problems, and its purpose is to move an induction heating device by following a meandering steel plate edge using a simple device that does not require a position detector. Therefore, it is an object of the present invention to provide an induction heating device for the edge of a steel plate that can always uniformly heat the edge of the steel plate.
本発明は、上記問題点を解決するためのに次のような手
段を採った。即ち、搬送中の鋼板の両エツジ部をそれぞ
れ加熱コイルで加熱する鋼板エツジの誘導加熱装置にお
いて、前記両エツジ部での加熱コイルにそれぞれ投入さ
れる電力を検出する手段と、前記投入電力の変化に基づ
いて、鋼板の両エツジ部と加熱コイルとの距離を常に一
定に保つように、前記加熱コイルを、前記鋼板の幅方向
に移動させる手段とを備えたことを特徴とする鋼板エツ
ジの誘導加熱装置としたものである。The present invention takes the following measures to solve the above problems. That is, in an induction heating device for a steel plate edge in which both edge portions of a steel plate being conveyed are heated by heating coils, there is provided a means for detecting the electric power input to the heating coils at both edge portions, and a change in the input electric power. A method for guiding a steel plate edge according to This is a heating device.
搬送されてくる鋼板が蛇行すると、誘導加熱装置の負荷
（インピーダンス）が変化するため、同一電圧であって
も投入電力が変化する。そのため投入電力をモニタする
ことにより、鋼板の蛇行状態を推定することができる。
従って鋼板の両エツジを均等に加熱するには、両誘導加
熱装置の加熱コイルへの投入電力が等しくなるように、
該加熱コイルを鋼板幅方向に移動させればよいことにな
る。
本発明は、この点に着目し、鋼板の蛇行量を、加熱コイ
ルへの投入電力の変化で捉え（必ずしも蛇行量自体を顕
在化させる必要はない）、加熱コイルを、投入電力が等
しくなるように、即ち、この加熱コイルと鋼板の両エツ
ジ部との距離が常に一定となるように、鋼板の蛇行に追
従させて移動させるようにして、鋼板側エツジ部分の均
一加熱を行うようにしたものである。従って本発明では
位置検出器や蛇行検出器を必要とせず、低コスト化及び
構造の簡素化が実現できる。When the conveyed steel plate meanderes, the load (impedance) on the induction heating device changes, so the input power changes even if the voltage is the same. Therefore, by monitoring the input power, the meandering state of the steel plate can be estimated. Therefore, in order to heat both edges of the steel plate equally, the power input to the heating coils of both induction heating devices must be equal.
All that is required is to move the heating coil in the width direction of the steel sheet. The present invention focuses on this point, and the amount of meandering of the steel plate is determined by the change in the power input to the heating coil (it is not necessary to make the amount of meandering itself obvious), and the heating coil is adjusted so that the amount of power input is equal. That is, the heating coil is moved to follow the meandering of the steel plate so that the distance between the heating coil and both edges of the steel plate is always constant, thereby uniformly heating the edge of the steel plate. It is. Therefore, the present invention does not require a position detector or meandering detector, and can realize cost reduction and structural simplification.
以下、本発明の一実施例を図面に基づいて詳細に説明す
る。
加熱コイルと鋼板との位置関係を表す第１図に示される
ように、搬送される鋼板１の両端エツジ部１ａ、１ａに
対向して、〈圧延機の）被動側加熱コイル２及び駆動側
加熱コイル３が設けられている。これら被動側及び駆動
側の加熱コイル２、３は、それぞれ移動手段５．５と連
結されている。
この移動手段は、加熱コイルを鋼板１の幅方向に連動し
て移動させるものであればどのような形式のものでも良
く、例えば「特開昭５３−１４１１１３号」に記載され
た台車式等を使用する。即ち、加熱コイルが台車に連結
され、この台車が油圧シリンダに連結されている形式の
ものである。従って、この移動手段５．５を駆動させれ
ば、被動側及び駆動側の加熱コイル２．３は、それぞれ
鋼板１の搬送方向と直交する方向に移動することができ
る。
鋼板１の両エツジ部１ａ、ｌａを加熱するためには、被
動側及び駆動側加熱コイル２．３に電力を供給してやれ
ば良い、電力の投入量に関しては、鋼板１の両エツジ部
１ａ、ｌａと被動側及び駆動側加熱コイル２．３との距
離ａ、 ｂが同一であれば、電力の投入量もまた同一で
ある。このａ、 ｂの距離が常に同一であれば、鋼板１
の両エツジ部１ａ、１ａに対して常に均一な加熱が可能
であるが、実際には、搬送される鋼板１は、搬送方向に
直交する方向に蛇行しながら搬送される。つまり、距離
ａ、ｂは常に変化しているものである。
距離ａ、ｂの変化は、投入電力の変化につながる。距Ｈ
ａ 、ｂと投入電力との関係は、電圧Ｖが一定の場合、
第２図のｆ（ａ）で示すようななだらかな右下がりの曲
線となる。即ち、距Ｍａあるいはわが大きくなれば、同
一電圧でも投入電力Ｐは少なくなるという関係があるこ
とがわかる。なお、第２図において ｆ（ａ）は、被動
側加熱コイル２への投入電力Ｐｗｓ （距Ｈａの関数）
を示し、Ｖ２Ｃは電圧が一定であることを示すものであ
る。
そして、ｆ（ｂ）は駆動側加熱コイル３への投入電力Ｐ
ｏｓ （距離すの関数）を示す。つまり、距離ａが大き
くなるということは、第１図において鋼板１が右側の駆
動側加熱コイル３１ＦＩに寄って搬送されるということ
であり、そうすると、左開の被動側加熱コイル２１！Ｉ
への投入電力Ｐｗｓが少なくなることである。
このような変化が生じるのは、被動側及び駆動側加熱コ
イル２．３と、鋼板１の両エツジ部１ａ、１ａとの距離
の変化によりインピーダンスが変化するためである０本
発明は、上記の原理に基づいて為されたものであって、
投入電力ＰＷ９．ＰＯ５の変化を制御手段４に入力し、
この制御手段４から送られた信号によって、移動手段５
．５を介して被動側及び駆動側加熱コイル２．３と、鋼
板１の両エツジ部１ａ、ｌａとの距離が常にａ＝ ｂで
あるように移動させるものである。ａ＝ ｂの関係を常
に保つためには、上述したように、被動側及び駆動側加
熱コイル２．３をある移動量ΔＸだけ、鋼板１の蛇行に
追従させて移動させなければならない、この移動量ΔＸ
は次の数式によって求められる。
ΔＸ ＝ ｆ −’ （Ｐ ｗ ｓ ）Ｖ’Ｃ＋ｆ −
’ （Ｐ ｏ ｓ ）ｙ−＝ｚ／ ２・・・（１）
このようにして求めた移動量ΔＸに基づいて移動手段５
．５に指令を出し、被動側及び駆動側加熱コイル２．３
を鋼板１の蛇行に追従させるためΔＸだけ移動させる。
従って、常にａ＝ ｂの関係が保たれる結果、鋼板１の
両エツジ部１ａ、ｌａに均一な加熱が可能となる。
なお、投入電力ＰＷ９．ＰＤ９に基づいて加熱コイルを
移動させる手段としては、例えば（Ｐｗｓ Ｐｏ５）
＞ＰＣが成立したときは（Ｐｗｓ−Ｐｏｓ）＜Ｏとなる
まで被動側に、（Ｐｏｓ Ｐｗ ｓ ） ＞ Ｐ Ｃ
が成立したときは（Ｐｏｓ−Ｐｗｓ）く０となるまで駆
動側にそれぞれ加熱コイルを移動させるような構成も考
えられる。ここでＰＣはハンチング防止用の定数（電力
）である、即ち、ＰＷ！３．ＰＣ）９にｐｃ以上の差が
ついたときに、この差がなくなるまで移動するものであ
る。Hereinafter, one embodiment of the present invention will be described in detail based on the drawings. As shown in FIG. 1, which shows the positional relationship between the heating coil and the steel plate, the driven side heating coil 2 (of the rolling mill) and the driving side heating coil 2 are placed opposite the edge portions 1a, 1a at both ends of the steel plate 1 being conveyed. A coil 3 is provided. These driven and drive side heating coils 2, 3 are each connected to a moving means 5.5. This moving means may be of any type as long as it moves the heating coil in conjunction with the width direction of the steel plate 1. For example, a trolley type described in ``Japanese Patent Application Laid-Open No. 141113/1983'' may be used. use. That is, the heating coil is connected to a truck, and this truck is connected to a hydraulic cylinder. Therefore, by driving this moving means 5.5, the driven side and driving side heating coils 2.3 can each be moved in a direction perpendicular to the conveyance direction of the steel plate 1. In order to heat both edge portions 1a, la of steel plate 1, it is sufficient to supply power to the driven side and driving side heating coils 2.3. Regarding the amount of power input, both edge portions 1a, la of steel plate 1 If the distances a and b between the driven side heating coil 2.3 and the driven side heating coil 2.3 are the same, the amount of power input is also the same. If the distance between a and b is always the same, steel plate 1
Although it is possible to always uniformly heat both edge portions 1a, 1a, in reality, the steel plate 1 being conveyed is conveyed while meandering in a direction perpendicular to the conveyance direction. In other words, the distances a and b are constantly changing. Changes in distances a and b lead to changes in input power. Distance H
The relationship between a, b and input power is as follows when voltage V is constant:
This results in a gentle downward-sloping curve as shown by f(a) in FIG. That is, it can be seen that there is a relationship such that as the distance Ma or the distance Ma increases, the input power P decreases even if the voltage is the same. In addition, in Fig. 2, f(a) is the input power Pws to the driven side heating coil 2 (a function of the distance Ha)
, and V2C indicates that the voltage is constant. And f(b) is the input power P to the drive side heating coil 3
os (a function of distance). In other words, when the distance a becomes larger, it means that the steel plate 1 is conveyed closer to the driving side heating coil 31FI on the right side in FIG. I
This means that the input power Pws to is reduced. Such a change occurs because the impedance changes due to a change in the distance between the driven side and driving side heating coils 2.3 and both edge portions 1a, 1a of the steel plate 1. It was done based on the principle,
Input power PW9. Inputting the change in PO5 to the control means 4,
The moving means 5 is controlled by the signal sent from the control means 4.
．． 5 so that the distance between the driven side and driving side heating coils 2.3 and both edge portions 1a and la of the steel plate 1 is always a=b. In order to always maintain the relationship a=b, as mentioned above, the driven side and driving side heating coils 2.3 must be moved by a certain amount of movement ΔX, following the meandering of the steel plate 1. Amount ΔX
is calculated by the following formula. ΔX = f −' (P w s ) V'C+f −
'(Pos)y-=z/2...(1) Based on the movement amount ΔX obtained in this way, the moving means 5
．． 5, and the driven side and drive side heating coils 2.3
is moved by ΔX in order to follow the meandering of the steel plate 1. Therefore, since the relationship a=b is always maintained, both edge portions 1a and la of the steel plate 1 can be heated uniformly. Note that input power PW9. As a means for moving the heating coil based on PD9, for example (Pws Po5)
> When PC is established, (Pos Pw s ) > P C to the driven side until (Pws - Pos) < O.
A conceivable configuration is such that when (Pos-Pws) is established, the heating coils are moved to the drive side until (Pos-Pws) becomes zero. Here, PC is a constant (power) for preventing hunting, that is, PW! 3. PC) When there is a difference of more than pc in 9, the movement is performed until this difference disappears.
本発明は、以上のように構成されているので、鋼板の蛇
行量を検出する検出器なしで捉えることができ、加熱コ
イルを鋼板の蛇行に追従させることができる。従って、
経済的に有利で、しかも鋼板の両エツジ部を均一に加熱
することのできる鋼板エツジの誘導加熱装置を提供する
ことが可能となった。Since the present invention is configured as described above, the amount of meandering of the steel plate can be detected without a detector, and the heating coil can be made to follow the meandering of the steel plate. Therefore,
It has now become possible to provide an apparatus for induction heating the edge of a steel plate that is economically advantageous and can uniformly heat both edges of the steel plate.
第１図は本発明の一実施例に係る誘導加熱装置と鋼板と
の位置関係を示す断面図、第２図は誘導加熱装置と一鋼
板間の距離と投入電力との関係を示す線図である。
１・・・鋼板、 １ａ・・・エツジ部、
２・・・被動側加熱コイル、 ３・・・駆動側加熱コイ
ル、４・・・制御手段、 ５・・・移動手段。Fig. 1 is a sectional view showing the positional relationship between an induction heating device and a steel plate according to an embodiment of the present invention, and Fig. 2 is a diagram showing the relationship between the distance between the induction heating device and a steel plate and the input power. be. 1... Steel plate, 1a... Edge part,
2... Driven side heating coil, 3... Drive side heating coil, 4... Control means, 5... Moving means.
Claims (1)
する鋼板エッジの誘導加熱装置において、前記両エッジ
部での加熱コイルにそれぞれ投入される電力を検出する
手段と、 前記投入電力の変化に基づいて、鋼板の両エッジ部と加
熱コイルとの距離を常に一定に保つように、前記加熱コ
イルを、前記鋼板の幅方向に移動させる手段と、 を備えたことを特徴とする鋼板エッジの誘導加熱装置。[Scope of Claims] A steel plate edge induction heating device that heats both edge portions of a steel plate being conveyed using heating coils, comprising: means for detecting electric power input to the heating coils at each of the edge portions; A means for moving the heating coil in the width direction of the steel plate so as to always maintain a constant distance between both edges of the steel plate and the heating coil based on changes in input power. Induction heating equipment for steel plate edges.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19819489A JPH0362495A (en) | 1989-07-31 | 1989-07-31 | Induction heating device of steel plate edge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19819489A JPH0362495A (en) | 1989-07-31 | 1989-07-31 | Induction heating device of steel plate edge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0362495A true JPH0362495A (en) | 1991-03-18 |
Family
ID=16387036
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19819489A Pending JPH0362495A (en) | 1989-07-31 | 1989-07-31 | Induction heating device of steel plate edge |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0362495A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002313544A (en) * | 2001-04-17 | 2002-10-25 | Denki Kogyo Co Ltd | Method and device for high frequency induction heating |
| JP2006326512A (en) * | 2005-05-27 | 2006-12-07 | S T Chem Co Ltd | Spray apparatus |
| JP2013138036A (en) * | 2007-09-13 | 2013-07-11 | Neturen Co Ltd | Method of determining positional relation between heating coil and work |
-
1989
- 1989-07-31 JP JP19819489A patent/JPH0362495A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002313544A (en) * | 2001-04-17 | 2002-10-25 | Denki Kogyo Co Ltd | Method and device for high frequency induction heating |
| JP4644379B2 (en) * | 2001-04-17 | 2011-03-02 | 電気興業株式会社 | High frequency induction heating method and apparatus |
| JP2006326512A (en) * | 2005-05-27 | 2006-12-07 | S T Chem Co Ltd | Spray apparatus |
| JP4676250B2 (en) * | 2005-05-27 | 2011-04-27 | エステー株式会社 | Spraying equipment |
| JP2013138036A (en) * | 2007-09-13 | 2013-07-11 | Neturen Co Ltd | Method of determining positional relation between heating coil and work |
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