JPH0610068A - Method for automatically controlling heat treatment of many kinds of rolls by ring burner and the like - Google Patents
Method for automatically controlling heat treatment of many kinds of rolls by ring burner and the likeInfo
- Publication number
- JPH0610068A JPH0610068A JP17135792A JP17135792A JPH0610068A JP H0610068 A JPH0610068 A JP H0610068A JP 17135792 A JP17135792 A JP 17135792A JP 17135792 A JP17135792 A JP 17135792A JP H0610068 A JPH0610068 A JP H0610068A
- Authority
- JP
- Japan
- Prior art keywords
- roll
- heat treatment
- rolls
- burner
- heating
- 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 45
- 238000000034 method Methods 0.000 title claims description 16
- 239000000956 alloy Substances 0.000 claims description 5
- 229910045601 alloy Inorganic materials 0.000 claims description 5
- 238000002844 melting Methods 0.000 claims description 5
- 230000008018 melting Effects 0.000 claims description 5
- 238000013021 overheating Methods 0.000 claims description 3
- 101100153331 Mus musculus Timp1 gene Proteins 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 238000012887 quadratic function Methods 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 238000000137 annealing Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000012886 linear function Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Landscapes
- Control Of Heat Treatment Processes (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、ロール類の熱処理方法
に関し、特にリングバーナーによる熱処理において、ロ
ール全体を均一温度に加熱し、品質むらの少ない製品を
得る熱処理のための自動制御方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat treatment method for rolls, and more particularly to an automatic control method for heat treatment by a ring burner in which the entire roll is heated to a uniform temperature to obtain a product with less uneven quality.
【０００２】[0002]
【従来の技術】従来、ロール類等の熱処理において、製
品を加熱する際に温度むらをなくし、均一加熱を行なう
ため、加熱炉を使用する炉内加熱を行なうのが普通であ
り、大型炉を必要とした。また、炉内加熱の場合は製品
の全体加熱となり、歪みの発生を起こしたりした。2. Description of the Related Art Conventionally, in heat treatment of rolls and the like, in order to eliminate uneven temperature when heating products and to perform uniform heating, it is common to perform heating in a furnace using a heating furnace. Needed. Further, in the case of heating in the furnace, the whole product was heated, which caused distortion.
【０００３】[0003]
【発明が解決しようとする課題】そこで、リングバーナ
ー加熱あるいは高周波誘導加熱等を行なえば、局部加熱
方式となるため、ロール全体の変形等は小さくなるが、
加熱温度の均一化を図ることが難しかった。Therefore, if ring burner heating or high frequency induction heating is performed, the local heating system is used, so that the deformation of the entire roll is reduced, but
It was difficult to make the heating temperature uniform.
【０００４】とくに、ロール類の加熱始端部と終端部
は、構造や形状に基づく熱容量の相違や、熱伝導特性の
違いにより、加熱温度むらを生じやすく、全体で一定の
熱処理条件を得ることは困難であった。とくに検出端か
ら得た温度情報のみによる制御では、十分な制御ができ
なかった。したがって 均一加熱を行なうための制御方
法の開発が強く求められていた。In particular, the heating start end and the end of the rolls are apt to cause uneven heating temperature due to the difference in heat capacity based on the structure and shape and the difference in heat conduction characteristics, and it is impossible to obtain a constant heat treatment condition as a whole. It was difficult. In particular, the control based only on the temperature information obtained from the detection end was not sufficient. Therefore, there has been a strong demand for development of a control method for performing uniform heating.
【０００５】本発明は前記の問題点を解決し、リングバ
ーナーによる熱処理において、ロール全体を均一温度に
加熱し、品質むらの少ない製品を得る熱処理のための自
動制御方法を提供することを目的としている。An object of the present invention is to solve the above-mentioned problems and to provide an automatic control method for heat treatment by a ring burner, in which the entire roll is heated to a uniform temperature to obtain a product with less quality unevenness. There is.
【０００６】[0006]
【課題を解決するための手段】上記目的を達成するた
め、本発明者等は鋭意研究を重ねた結果、熱処理の温度
情報に基づく制御とともに、プログラム制御を行なうこ
とが効果的であることを知見し、本発明を完成するに至
った。In order to achieve the above object, the inventors of the present invention have conducted extensive studies and found that it is effective to perform program control as well as control based on temperature information of heat treatment. Then, the present invention has been completed.
【０００７】すなわち本発明は、ロール類を移動式リン
グバーナー等で熱処理する場合の自動制御において、ロ
ール始端部および終端部の熱処理制御を容易にするた
め、ロール長手方向をゾーン区分して、各部の形状およ
び熱特性にあった制御関数を決めてリングバーナー等の
送り速度を制御することを特徴とするロール類熱処理の
自動制御方法を要旨としている。そして、ロール始端部
および終端部の非定常部分の加熱において、始端部は数
回の往復予熱等により、定常熱処理に近い温度に加熱後
熱処理を行ない、終端部は過熱を避けるため高速移動を
行なうことも本発明熱処理の自動制御方法の範囲であ
る。また、自溶合金、溶射層の溶融化処理を行なうに際
し、表面の半溶融状態を、表面の反射率を測定するセン
サーで検知し、それによりバーナー等の移動速度を制御
する事も包含されている。That is, according to the present invention, in automatic control when heat-treating rolls with a movable ring burner or the like, in order to facilitate heat treatment control of the roll start end and end, the roll longitudinal direction is zoned and each part is divided. The gist is an automatic control method for heat treatment of rolls, which is characterized by determining a control function suitable for the shape and thermal characteristics of the roll and controlling the feed rate of a ring burner or the like. Then, in the heating of the unsteady portion of the roll start end and the end, the start end is heated to a temperature close to the steady heat treatment by reciprocating preheating several times, and the end is moved at high speed to avoid overheating. This is also within the scope of the automatic heat treatment control method of the present invention. In addition, when performing the melting treatment of the self-fluxing alloy and the sprayed layer, it is also included that the semi-molten state of the surface is detected by a sensor that measures the reflectance of the surface, and thereby the moving speed of the burner is controlled. There is.
【０００８】[0008]
【作用】本発明の構成と作用を説明する。一般に、ロー
ル類を移動させながら一端から他端までバーナーあるい
は高周波誘導加熱等で加熱を行なう場合、軸方向に温度
むらを生じやすい。したがって本発明ではまず、ロール
軸方向の位置によって加熱条件を変える区分制御方法を
取っている。すなわち、軸方向を少なくとも始端部、中
央部、終端部に分けて、プログラム制御を行なうのであ
る。The structure and operation of the present invention will be described. Generally, when heating from one end to the other end by a burner or high frequency induction heating while moving the rolls, temperature unevenness is likely to occur in the axial direction. Therefore, in the present invention, first, a classification control method is adopted in which the heating condition is changed depending on the position in the roll axial direction. That is, the program control is performed by dividing the axial direction into at least the start end portion, the central portion, and the end portion.
【０００９】始端部ではスタート予熱運転を行なうが、
バーナー等の移動速度Ｖが、 Ｖ＝Ａ1Ｘ2＋Ｂ1Ｘ＋Ｃ1 （Ｘは移動距離，Ａ1，Ｂ1，Ｃ1は定数として与える）
により変わるようにセットする。そしてある区間前進
後、最高速度で始点に復帰するようにし、この動作を数
回繰り返す方法を取る。At the start end, a start preheat operation is performed,
The moving speed V of the burner or the like is V = A 1 X 2 + B 1 X + C 1 (X is a moving distance, A 1 , B 1 , and C 1 are constants)
Set to change according to. Then, after moving forward for a certain section, the vehicle returns to the starting point at the maximum speed, and this operation is repeated several times.
【００１０】また、最初のパスの始点からの移動開始
は、ある一定温度（ＴA）になってから移動が始まるよ
うにし、さらに始端がある温度（ＴB）を越えたときか
ら定常熱処理制御を開始するようにすると、制御はうま
くいく。Further, the movement is started from the starting point of the first pass so that the movement starts after reaching a certain temperature (T A ), and the steady-state heat treatment control is performed when the starting point exceeds a certain temperature (T B ). If you try to start, control will work.
【００１１】リングバーナーによる熱処理自動制御装置
の概要を図１に示す。本装置ではリングバーナー（１）
を設置した台車（３）が制御移動できる構造となってお
り、ＴA（４）、ＴB（５）がセンサーである。すなわ
ち、センサー入力をもとに台車移動速度を制御するよう
になっている。FIG. 1 shows an outline of a heat treatment automatic control system using a ring burner. This device has a ring burner (1)
The trolley (3) in which is installed can be controlled and moved, and T A (4) and T B (5) are sensors. That is, the moving speed of the carriage is controlled based on the sensor input.
【００１２】ここで、バーナー移動速度Ｖを移動距離Ｘ
の２次関数式で制御する理由は、単なる比例制御あるい
は１次関数式制御では、微細な制御が出来難く、精度の
よい制御を行なうため、２次関数式制御を行なうのであ
る。Here, the burner moving speed V is set to the moving distance X
The reason for controlling with the quadratic function formula is that the quadratic function formula control is performed because fine control is difficult to perform with simple proportional control or linear function formula control, and accurate control is performed.
【００１３】そのため、制御系がほとんど比例制御でよ
い場合には、定数Ａ1，Ｃ1は０に近いものとなる。また
２次関数制御では、定数Ａ1，Ｂ1，Ｃ1の高精度選定に
よって、他の関数制御に近似させることは容易であり、
ほとんどの制御系で大きな誤差を生ずることがないため
である。Therefore, the constants A 1 and C 1 are close to 0 when the control system is almost proportional control. Further, in the quadratic function control, it is easy to approximate to other function control by selecting the constants A 1 , B 1 , and C 1 with high precision.
This is because a large error does not occur in most control systems.
【００１４】中央部を含む定常ゾーンでは、表面状態測
定センサー制御を主とした移動速度制御によって定常運
転を行なう。この場合の制御方法は比例制御（Ｐ）、積
分制御（Ｉ）、微分制御（Ｄ）を適当に組み合わせて行
なう。この場合、Ｐ，Ｉ，Ｄに関係する係数は実験で決
定する。In the steady zone including the central portion, steady operation is performed by moving speed control mainly for controlling the surface state measuring sensor. The control method in this case is performed by appropriately combining proportional control (P), integral control (I), and derivative control (D). In this case, the coefficients related to P, I, D are determined experimentally.
【００１５】終端部ではバーナー等の逃げ運転を行な
い、過熱を避ける。この場合ある特定ゾーンについて
は、あらかじめ速度Ｖが、 Ｖ＝Ａ2Ｘ2＋Ｂ2Ｘ＋Ｃ2 （Ｘは移動距離、Ａ2，Ｂ2，Ｃ2は定数）になるようセ
ットして、プログラム制御を行なうようにし、終端近傍
では最高スピードで退避箇所までバーナーを移動させる
のがよい。At the end portion, escape operation such as a burner is performed to avoid overheating. In this case, for a certain specific zone, the speed V is set in advance so that V = A 2 X 2 + B 2 X + C 2 (X is a moving distance, A 2 , B 2 , C 2 are constants), and program control is performed. The burner should be moved to the evacuation area at the maximum speed near the end.
【００１６】終端部の制御方法も始端部の制御方法と同
様で、２次関数制御を行なうが、制御定数Ａ2，Ｂ2，Ｃ
2は始端部の場合のＡ1，Ｂ1，Ｃ1とは最適値が異なるの
で、別途選定を行なわねばならない。The control method of the terminal end is the same as the control method of the start end, and quadratic function control is performed, but the control constants A 2 , B 2 , C
Since the optimum value of 2 is different from A 1 , B 1 and C 1 in the case of the starting end, it must be selected separately.
【００１７】自溶合金溶射層の溶融化処理を行なうに際
し、放射温度計等で測定した温度では、溶射材料によっ
ては、半溶融状態と的確に対応しないことがあるが、半
溶融状態の表面反射率を測定すると、これと正確に対応
するため、熱処理を正確にしかも均一に行なうことが出
来る。これは溶射層が加熱されて半溶融状態になると急
に表面が平滑になって鏡面に近くなるため反射率が急増
するからである。When performing the melting treatment of the self-fluxing alloy sprayed layer, the temperature measured by a radiation thermometer or the like may not accurately correspond to the semi-molten state depending on the sprayed material. When the rate is measured, it corresponds exactly, so that the heat treatment can be performed accurately and uniformly. This is because when the thermal sprayed layer is heated to a semi-molten state, the surface suddenly becomes smooth and becomes close to a mirror surface, so that the reflectance rapidly increases.
【００１８】[0018]
【実施例】本発明の構成・効果を実施例により具体的に
説明するが、これにより本発明が限定されるものではな
い。 実施例１ 本発明の具体例として、自溶合金溶射皮膜にバーナー溶
融化処理を適用したが、設定反射率２５％で制御した結
果、測定温度のバラツキは小さく、全長にわたって適正
温度±５℃の範囲におさまり、溶射皮膜の品質のバラツ
キも従来の手動操作に比べて１／５に減少した。EXAMPLES The constitution and effects of the present invention will be specifically described by way of examples, but the present invention is not limited thereto. Example 1 As a specific example of the present invention, a burner melting treatment was applied to a self-fluxing alloy sprayed coating, but as a result of controlling with a set reflectance of 25%, the variation in measured temperature was small, and the appropriate temperature was ± 5 ° C over the entire length. Within the range, variations in the quality of the sprayed coating were reduced to 1/5 of the conventional manual operation.
【００１９】自溶合金の溶融化処理の実施例チャート
を、ロール全長にわたり図２に示しているが、自動制御
の場合は温度変化が小刻みで変動範囲が狭く、周期が短
くなっているのが特徴である。これに反し、マニュアル
制御の場合には、温度変動が大きく激しい。これは自動
の場合の方が、自動制御がうまく応答し、高精度の制御
が行なわれるために他ならない。An example chart of the melting treatment of the self-fluxing alloy is shown in FIG. 2 over the entire length of the roll. However, in the case of automatic control, the temperature change is small and the variation range is narrow, and the cycle is short. It is a feature. On the contrary, in the case of manual control, the temperature fluctuation is large and severe. This is none other than the automatic case because the automatic control responds well and a highly accurate control is performed.
【００２０】実施例２ また、ロールのバーナー焼鈍の例では、設定温度
（ＴB）６５０℃に対して、全長にわたって６５０±５
℃の範囲におさまった。Example 2 In the example of burner annealing of rolls, the set temperature (T B ) was 650 ° C., and 650 ± 5 over the entire length.
It fell within the range of ℃.
【００２１】[0021]
【発明の効果】本発明は、以上説明したように構成され
ているから、製品品質の安定化、処理工程の省力化にす
ぐれた効果を示し、産業上益するところ極めて大であ
る。Since the present invention is constructed as described above, it has an excellent effect in stabilizing product quality and labor saving in processing steps, and is extremely advantageous in industrial terms.
【図１】 本発明の処理工程を実施する装置の概要図で
ある。FIG. 1 is a schematic diagram of an apparatus for carrying out the processing steps of the present invention.
【図２】 ロール全長にわたる温度分布の説明図であ
る。FIG. 2 is an explanatory diagram of a temperature distribution over the entire roll length.
１ リングバーナー ２ 被熱処理ロール ３ バーナー、測温センサーのついた台車 ４ 輝度計（ＴA）入力 ５ 測温計（設定用）（ＴB）入力 ６ 中央制御装置 ７ Ｏ2ガス制御バルブ ８ 燃料ガス制御バルブ ９ 台車制御出力1 ring burner 2 to be thermally rolls 3 burner, temperature measuring sensors marked with bogie 4 luminance meter (T A) Input 5 temperature measuring meter (setting) (T B) input 6 the central control unit 7 O 2 gas control valve 8 Fuel Gas control valve 9 Truck control output
───────────────────────────────────────────────────── フロントページの続き (72)発明者 河本 方宏 愛知県東海市東海町５−３ 新日本製鐵株 式会社名古屋製鐵所構内日鉄ハード株式会 社名古屋事業所内 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Fukuhiro Kawamoto 5-3 Tokai-cho, Tokai-shi, Aichi Nippon Steel Co., Ltd. Nagoya Steel Works premises Nippon Steel Hard Co., Ltd. Nagoya Works
Claims (4)
理する場合の自動制御において、ロール始端部および終
端部の熱処理制御を容易にするため、ロール長手方向を
ゾーン区分して、各部の形状および熱特性にあった制御
関数を決めてリングバーナー等の送り速度を制御するこ
とを特徴とするロール類熱処理の自動制御方法。1. In automatic control when heat-treating rolls with a movable ring burner or the like, in order to facilitate heat treatment control of a roll start end portion and a roll end portion, the roll longitudinal direction is zone-divided and the shape of each portion and An automatic control method for heat treatment of rolls, characterized in that a feed rate of a ring burner or the like is controlled by determining a control function suitable for thermal characteristics.
加熱において、始端部は数回の往復予熱等により、定常
熱処理に近い温度に加熱後熱処理を行ない、終端部は過
熱を避けるため高速移動を行なう請求項１記載のロール
類熱処理の自動制御方法。2. In the heating of the unsteady portion of the roll start and end portions, the start end portion is heated to a temperature close to the steady heat treatment after several reciprocal preheatings, and the end portion is heated at high speed to avoid overheating. The automatic control method for heat treatment of rolls according to claim 1, wherein the automatic movement is performed.
際し、表面の半溶融状態を、表面の反射率を測定するセ
ンサーで検知し、それによりバーナー等の移動速度を制
御する請求項１または２記載のロール類熱処理の自動制
御方法。3. A method of controlling a moving speed of a burner or the like by detecting a semi-molten state of a surface by a sensor for measuring a reflectance of the surface when performing a melting treatment of a self-fluxing alloy and a sprayed layer. 1. An automatic control method for heat treatment of rolls according to 1 or 2.
よりバーナー等の定温加熱移動制御を行なう請求項１、
２または３記載のロール類熱処理の自動制御方法。4. The constant temperature heating movement control of a burner or the like is performed by a temperature sensor during the operation of the steady heat treatment.
2. An automatic control method for heat treatment of rolls according to 2 or 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17135792A JPH0610068A (en) | 1992-06-29 | 1992-06-29 | Method for automatically controlling heat treatment of many kinds of rolls by ring burner and the like |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17135792A JPH0610068A (en) | 1992-06-29 | 1992-06-29 | Method for automatically controlling heat treatment of many kinds of rolls by ring burner and the like |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0610068A true JPH0610068A (en) | 1994-01-18 |
Family
ID=15921690
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17135792A Pending JPH0610068A (en) | 1992-06-29 | 1992-06-29 | Method for automatically controlling heat treatment of many kinds of rolls by ring burner and the like |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0610068A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08209471A (en) * | 1994-11-10 | 1996-08-13 | Karl Mayer Textil Mas Fab Gmbh | Spraying device for cleaning the working area of the yarn processing device |
-
1992
- 1992-06-29 JP JP17135792A patent/JPH0610068A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08209471A (en) * | 1994-11-10 | 1996-08-13 | Karl Mayer Textil Mas Fab Gmbh | Spraying device for cleaning the working area of the yarn processing device |
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| Date | Code | Title | Description |
|---|---|---|---|
| A02 | Decision of refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A02 Effective date: 20011009 |