JP2000019054A - Method for judging life of transfer roll in furnace - Google Patents
Method for judging life of transfer roll in furnaceInfo
- Publication number
- JP2000019054A JP2000019054A JP10183192A JP18319298A JP2000019054A JP 2000019054 A JP2000019054 A JP 2000019054A JP 10183192 A JP10183192 A JP 10183192A JP 18319298 A JP18319298 A JP 18319298A JP 2000019054 A JP2000019054 A JP 2000019054A
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- Prior art keywords
- furnace
- life
- roll
- transfer roll
- frequency response
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Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、製鉄業等で鋼板
等を炉内で搬送する際に用いられる炉内搬送ロールを、
非破壊的に調査して寿命を判定する炉内搬送ロールの寿
命判定方法に関する。BACKGROUND OF THE INVENTION The present invention relates to a transfer roll in a furnace used when a steel plate or the like is transferred in a furnace in the steel making industry or the like.
The present invention relates to a method for determining the life of a transport roll in a furnace, which determines the life by nondestructively investigating.
【０００２】[0002]
【従来の技術】鋼板の製造においては、鋼板を炉内で連
続的に搬送しながら、熱処理等の処理を行うことがあ
る。その場合、図３に示すように加熱炉１等の炉内には
鋼板２の搬送のために、炉内搬送ロール３が設けられて
いる。炉内搬送ロールは、図４に示すような形状をして
おり、円筒状で中空の胴部３１と、両端の軸受部３２か
らなる。2. Description of the Related Art In the manufacture of a steel sheet, a heat treatment or the like is sometimes performed while the steel sheet is continuously conveyed in a furnace. In this case, as shown in FIG. 3, an in-furnace transfer roll 3 is provided in the furnace such as the heating furnace 1 for transferring the steel plate 2. The in-furnace transfer roll has a shape as shown in FIG. 4 and includes a cylindrical hollow body 31 and bearings 32 at both ends.
【０００３】炉内搬送ロールは、一般に高温の状態で使
用されるため、変形を生じあるいは疲労し劣化する。こ
のような劣化が進行すると、炉内搬送ロールは使用不能
となるので、その使用可能な期限、即ち寿命を予測する
必要がある。炉内搬送ロールの寿命を予測する方法（寿
命判定方法）としては、ロール径を測定する方法があ
る。この方法は、炉内搬送ロールの表面において、特に
疲労、劣化の激しい部分では大きな肉厚の変化を生じる
ことから、ロール径の変化を測定するにより、寿命判定
するものである。[0003] Since the in-furnace transfer roll is generally used at a high temperature, it is deformed or deteriorates due to fatigue. When such deterioration proceeds, the in-furnace transport roll becomes unusable, and it is necessary to predict the expiration date, that is, the life of the roll. As a method of estimating the life of the transport roll in the furnace (life determination method), there is a method of measuring the roll diameter. According to this method, a large change in wall thickness occurs in the surface of the in-furnace transfer roll, particularly in a portion where fatigue and deterioration are severe, so that the life is determined by measuring a change in the roll diameter.
【０００４】また、特開平８−１６６３３２号公報に、
硬度測定による寿命判定方法が提案されている。この技
術は、超音波硬度計を用いてロール表面の硬度を測定
し、初期の硬度に対して１／２以下となった場合、その
ロールが寿命であると判定する方法である。Further, Japanese Patent Application Laid-Open No. 8-166332 discloses that
There has been proposed a life determination method based on hardness measurement. This technique is a method in which the hardness of a roll surface is measured using an ultrasonic hardness tester, and when the hardness becomes 1/2 or less of the initial hardness, it is determined that the roll has reached the end of its life.
【０００５】その他、透磁率測定により、疲労、材質の
劣化の程度を評価し、ロールの寿命を判定する方法もあ
る。これは、材質面の変化が透磁率の変化として現れる
ことを利用したものである。[0005] In addition, there is a method in which the degree of fatigue and deterioration of the material are evaluated by measuring the magnetic permeability to determine the life of the roll. This utilizes the fact that a change in the material surface appears as a change in magnetic permeability.
【０００６】[0006]
【発明が解決しようとする課題】しかし、これらの従来
技術には以下の問題点がある。However, these prior arts have the following problems.
【０００７】まず、ロール径測定による寿命判定方法
は、ロールの疲労、劣化が必ずしもロール径の変化に対
応しておらず、寿命判定の精度が低い。また、ロール径
の変化が他より小さかった部分から、ロールの折損が起
こることもあり、この方法は信頼性が高いとは言えな
い。一般に、ロール径の変化がそれほど顕著でないロー
ルでも折損する場合が多い。First, in the method for determining the life by measuring the roll diameter, fatigue and deterioration of the roll do not always correspond to changes in the roll diameter, and the accuracy of the life determination is low. In addition, the roll may be broken from a portion where the change in the roll diameter is smaller than the others, and this method cannot be said to be highly reliable. In general, even a roll whose change in roll diameter is not so remarkable often breaks.
【０００８】硬度測定による寿命判定方法は、ロール表
面を全面にわたって計測する必要があり、計測に時間が
かかる。また、特開平８−１６６３３２号公報記載の技
術のように、超音波硬度計を用いて計測を効率化して
も、ロール表面の全面を走査するためには、センサの走
査装置等、設備面でのコストがかかる。さらにはその自
動化にも、コストを必要とする。The method of determining the life by measuring the hardness requires measuring the entire surface of the roll, which takes a long time. Further, even if the measurement is made more efficient using an ultrasonic hardness tester as in the technique described in Japanese Patent Application Laid-Open No. 8-166332, in order to scan the entire surface of the roll, it is necessary to use a sensor scanning device or other equipment. Costs. Furthermore, the automation also requires costs.
【０００９】透磁率測定による寿命判定方法は、やは
り、ロール表面を全面にわたって計測する必要があり、
計測に時間がかかる。また、このような材質面での変化
を検出する目的で使用する透磁率のセンサは、耐熱温度
が４０℃と低いため、炉内で計測するためには、炉内温
度が高いと使用できない。炉温を４０℃以下となるよう
低下させるには、長時間のライン停止が必要であり炉の
生産効率が低下する。[0009] The life judgment method based on the magnetic permeability measurement also needs to measure the entire roll surface.
Measurement takes time. Further, a magnetic permeability sensor used for detecting such a change in the material surface has a low heat-resistant temperature of 40 ° C., and therefore cannot be used for measurement in a furnace when the furnace temperature is high. In order to lower the furnace temperature to 40 ° C. or lower, it is necessary to stop the line for a long time, and the production efficiency of the furnace decreases.
【００１０】この発明は、上記のような従来の寿命判定
方法における問題点を解決し、ロール表面の全面につい
て計測する必要がなく、簡便な設備でラインを停止が短
時間で済む炉内搬送ロールの寿命判定方法を提供するこ
とを目的とする。The present invention solves the above-mentioned problems in the conventional life judging method, and eliminates the need to measure the entire surface of the roll. It is an object of the present invention to provide a method for judging the life of a battery.
【００１１】[0011]
【課題を解決するための手段】第１の発明は、炉内搬送
ロールを非破壊的に調査して寿命を判定する炉内搬送ロ
ールの寿命判定方法において、炉内搬送ロールに所定の
加振力を加え、この炉内搬送ロールの振動を計測し、計
測された振動から周波数応答関数を測定し、この周波数
応答関数を基準となる周波数応答関数と比較することに
より、炉内搬送ロールの寿命を判定することを特徴とす
る炉内搬送ロールの寿命判定方法である。According to a first aspect of the present invention, there is provided a method for judging the life of an in-furnace transfer roll by non-destructively examining the in-furnace transfer roll. By applying a force, the vibration of the transfer roll in the furnace is measured, a frequency response function is measured from the measured vibration, and the frequency response function is compared with a reference frequency response function to determine the life of the transfer roll in the furnace. This is a method for determining the life of the in-furnace transfer roll, which is characterized in that
【００１２】この発明は、炉内搬送ロールの寿命判定方
法について、種々の方法を検討する中でなされた。その
中で、炉内搬送ロールの劣化に伴い、その周波数応答関
数が変化することを見出した。この発明は、炉内搬送ロ
ールの寿命を判定するために、この周波数応答関数が変
化する現象を用いている。ここで、周波数応答関数は、
加振力と振動から得られる伝達関数を、振動数（周波
数、角振動数）の関数として表現したものである。The present invention was made while examining various methods for determining the life of a transfer roll in a furnace. It was found that the frequency response function changes with the deterioration of the transfer roll in the furnace. The present invention uses the phenomenon that the frequency response function changes in order to determine the life of the transport roll in the furnace. Where the frequency response function is
The transfer function obtained from the excitation force and the vibration is expressed as a function of the frequency (frequency, angular frequency).
【００１３】加振力としては、一般の加振実験に用いら
れるインパルス、スイープサイン、バーストチャープ、
ランダム等、種々の形態を用いることができる。加振力
を加える箇所は最低１箇所、振動を検出する箇所も最低
１箇所でよい。従って、従来技術のようにロールの全面
について計測する必要はなく、計測時間を大幅に削減で
きる。The excitation force includes impulse, sweep sine, burst chirp, and the like used in general excitation experiments.
Various forms such as random can be used. At least one location for applying the excitation force and at least one location for detecting the vibration may be used. Therefore, there is no need to measure the entire surface of the roll unlike the related art, and the measurement time can be greatly reduced.
【００１４】基準となる周波数応答関数としては、搬送
ロールの使用前に予め測定しておいたもの、あるいは同
一仕様の新品ロールについて測定したものを用いること
ができる。また、比較の際は、測定値と基準値につい
て、固有振動数の大きさあるいは周波数等、何らかの特
性値についてそれらの差を求めると比較しやすい。As a reference frequency response function, a function previously measured before use of the transport roll or a function measured for a new roll having the same specification can be used. In comparison, it is easy to compare the difference between the measured value and the reference value for some characteristic value such as the magnitude or frequency of the natural frequency.
【００１５】この発明による寿命判定の精度について
は、後述のように、従来の透磁率計による判定方法と同
等の寿命判定精度が得られ、少なくともロール径測定に
よる判定より信頼がおける。また、この発明で用いる振
動センサの耐熱温度は、透磁率センサの耐熱温度（４０
℃）に比べ、はるかに高温となっている。従って、計測
の際に炉温をあまり下げる必要がなく、炉温低下による
稼働率の低下を防止できる。As to the accuracy of the life judgment according to the present invention, as will be described later, the same life judgment accuracy as that of the conventional judgment method using a magnetic permeability meter is obtained, and at least the judgment is more reliable than the judgment by the roll diameter measurement. The heat-resistant temperature of the vibration sensor used in the present invention is the heat-resistant temperature (40
℃). Therefore, it is not necessary to lower the furnace temperature much at the time of measurement, and it is possible to prevent a decrease in the operation rate due to a decrease in the furnace temperature.
【００１６】第２の発明は、加振力を打撃加振法により
加えることを特徴とする第１の発明の炉内搬送ロールの
寿命判定方法である。A second invention is a method for determining the life of a transport roll in a furnace according to the first invention, wherein a vibration force is applied by a striking vibration method.
【００１７】この発明では、加振力として試験対象に打
撃を加える打撃加振法により、インパルス応答を測定す
る。打撃法では、加振力をハンマ等で加えればよいの
で、特別な加振装置を必要とせず、搬送ロールには振動
センサのみ取付ければよい。従って、振動の計測が簡便
となり、特に搬送ロールを炉内に設置したままでも、容
易に周波数応答関数を測定することができる。In the present invention, the impulse response is measured by a striking vibration method in which a striking force is applied to the test object as a vibrating force. In the striking method, since a vibrating force may be applied by a hammer or the like, no special vibrating device is required, and only the vibration sensor may be attached to the transport roll. Therefore, the measurement of the vibration is simplified, and the frequency response function can be easily measured, particularly, with the transfer roll installed in the furnace.
【００１８】第３の発明は、周波数応答関数の比較の
際、特定の固有振動についてその振動数の基準値との差
に基づき炉内搬送ロールの寿命を判定することを特徴と
する第１あるいは第２の発明の炉内搬送ロールの寿命判
定方法である。According to a third aspect of the present invention, when comparing the frequency response functions, the life of the transport roll in the furnace is determined based on a difference between a specific natural vibration and a reference value of the frequency. It is a method for determining the life of a transfer roll in a furnace according to a second invention.
【００１９】この発明では、特定の固有振動として、使
用前後の変化が大きく現れる次数の固有振動を、別途調
査して見つけておく。ここで、適切な固有振動は、ロー
ルの寸法形状や材質により異なると考えられる。後述の
ように、ごく一般的な炉内搬送ロールについては、この
方法が有効であることがわかる。According to the present invention, as a specific natural vibration, a natural vibration of an order in which a change before and after use greatly appears is separately investigated and found. Here, it is considered that an appropriate natural vibration differs depending on the dimensions and the material of the roll. As will be described later, it can be seen that this method is effective for a very common in-furnace transfer roll.
【００２０】[0020]
【発明の実施の形態】図１は、本発明による寿命判定方
法の一例を示す概略図である。ここでは、炉内搬送ロー
ル３を取り出して、両端（軸受部）３２をブロック４で
支持して試験を行った。試験はまず、ロール中央部（胴
部）３１を半径方向に加振器（ハンマ）６で加振し、そ
の直近に取付けた振動センサ５（加速度型ピックアップ
センサ）により振動を計測する。この計測された振動波
形を用いて、周波数応答関数を測定する。FIG. 1 is a schematic diagram showing an example of a life determining method according to the present invention. Here, the test was carried out by taking out the in-furnace transport roll 3 and supporting both ends (bearing portions) 32 with the block 4. In the test, first, the center part (body part) 31 of the roll is vibrated by a vibrator (hammer) 6 in a radial direction, and the vibration is measured by a vibration sensor 5 (acceleration type pickup sensor) mounted immediately near the center part. The frequency response function is measured using the measured vibration waveform.
【００２１】この方法により、炉の定期点検の際、炉内
搬送ロールの中で使用期間が寿命に近づいているロール
を、炉外に取り出して測定を行った。比較方法として、
ロール径測定および透磁率測定による寿命判定も行っ
た。また、判定基準となるロールとして、同じ種類で新
品のロールについても、これらの方法で測定を行った。According to this method, at the time of periodic inspection of the furnace, rolls whose service life is approaching the end of the life among the rolls in the furnace were taken out of the furnace and measured. As a comparison method,
The life was determined by measuring the roll diameter and the magnetic permeability. Also, rolls of the same type and new rolls as the reference roll were measured by these methods.
【００２２】図２に、周波数応答関数の一例を示す。図
中、実線は試験ロール、破線は同じ材質・寸法の新品の
ロールを示す。周波数応答関数は、周波数の低い領域で
は値が小さくまた、試験ロールと新品ロールの差もほと
んどない。周波数が高くなると、周波数応答関数は値が
大きくなるとともに、新旧２本のロールの差が顕著とな
り、ピークの位置がシフトしていることがわかる。FIG. 2 shows an example of the frequency response function. In the figure, a solid line indicates a test roll, and a broken line indicates a new roll of the same material and dimensions. The frequency response function has a small value in a low frequency region, and there is almost no difference between the test roll and the new roll. As the frequency increases, the value of the frequency response function increases, and the difference between the old and new rolls becomes significant, indicating that the peak position is shifted.
【００２３】周波数応答関数は、この図の場合は特に８
００Ｈｚ前後のピーク（６次固有振動に対応）で、新旧
ロールによるピークの周波数の差が大きく（５０Ｈｚ以
上）なっている。その他、周波数応答関数の特徴を表す
パラメータについて調査し、最も感度の良いパラメータ
を選ぶと、６次固有振動に対応するピークの位置のシフ
トが最適であった。The frequency response function is particularly 8 in this case.
At the peak around 00 Hz (corresponding to the sixth-order natural vibration), the difference in the frequency of the peak between the new and old rolls is large (50 Hz or more). In addition, by investigating parameters representing the characteristics of the frequency response function and selecting the parameter having the highest sensitivity, the shift of the position of the peak corresponding to the sixth-order natural vibration was optimal.
【００２４】そこで、６次固有振動のピークシフトを測
定してまとめると、表１のようになる。この表で、ロー
ルＮｏ．１，２，５は、透磁率測定による判定で正常、
ロールＮｏ．３，４は同様に危険（寿命に到達）と認め
られたロールである。ピークシフトの大きさは、前者で
は２５〜３７Ｈｚ、後者では６５〜７９Ｈｚであった。
これよりこのロールについては、ピークシフトが５０Ｈ
ｚで寿命に到達と判定すればよいことがわかる。The peak shift of the sixth-order natural vibration is measured and summarized as shown in Table 1. In this table, the roll No. 1, 2, 5 are normal by the judgment by the magnetic permeability measurement,
Roll No. Rolls 3 and 4 are also recognized as dangerous (reaching the life). The magnitude of the peak shift was 25 to 37 Hz in the former and 65 to 79 Hz in the latter.
From this, for this roll, the peak shift is 50H
It can be seen that it is sufficient to determine that the life is reached in z.
【００２５】また、ロールＮｏ．３については、ロール
径測定による判定では正常となっているが、透磁率測定
および本発明による判定では危険となっている。過去の
実績からは、ロール径測定による判定より、透磁率測定
の方が信頼のおける方法である。従って、この発明の方
法は透磁率測定と同等の精度で、炉内搬送ロールの寿命
判定が可能であることがわかる。The roll No. The sample No. 3 is normal in the judgment by the roll diameter measurement, but is dangerous in the magnetic permeability measurement and the judgment by the present invention. Based on past results, magnetic permeability measurement is a more reliable method than determination by roll diameter measurement. Therefore, it can be seen that the method of the present invention can determine the life of the transport roll in the furnace with the same accuracy as the measurement of the magnetic permeability.
【００２６】[0026]
【表１】 [Table 1]
【００２７】この例では、周波数応答関数のパラメータ
として、６次固有振動のピークシフトを用いたが、他の
次数の固有振動のピークシフトを用いてもよい。また、
寿命判定用のパラメータとしては、ピークシフトのみに
限定されるものではなく、周波数応答関数により求まる
すべてのパラメータを使用することができる。In this example, the peak shift of the sixth-order natural vibration is used as the parameter of the frequency response function, but the peak shift of the natural vibration of another order may be used. Also,
The parameters for determining the life are not limited to only the peak shift, and all parameters obtained by the frequency response function can be used.
【００２８】加振点あるいは応答点についても、ロール
の中央部のみに限定されるものではなく、例えば、加振
点を中央部、応答点をロール端部とする中央部加振−端
部応答の周波数応答関数を用いることも可能である。さ
らに、周波数応答関数は１種類に限定されるものではな
く、例えば、１点加振−多点応答、多点加振−１点応
答、あるいは多点加振−多点応答により得られた複数の
周波数応答関数から、寿命判定用のパラメータを求める
ことも可能である。The excitation point or the response point is not limited to the center of the roll. For example, a central excitation-end response with the excitation point at the center and the response point at the end of the roll. It is also possible to use the frequency response function of Further, the frequency response function is not limited to one kind, and for example, a plurality of points obtained by one-point excitation-multipoint response, multipoint excitation-one-point response, or multipoint excitation-multipoint response It is also possible to obtain a parameter for life determination from the frequency response function of
【００２９】このように、発明の方法によると、従来の
ロール径測定による判定方法に比べ、寿命判定の精度が
高い。従来の超音波硬度計および透磁率計による判定方
法に比べ、計測点が少なく最低１点でよいため計測時間
が短くなる。従って、自動化が容易となり、低コスト化
が図れるとともに、従来の透磁率計による判定方法と同
等の寿命判定精度が得られる。As described above, according to the method of the present invention, the accuracy of life determination is higher than that of the conventional determination method based on roll diameter measurement. Compared with the conventional determination method using an ultrasonic hardness meter and a permeability meter, the number of measurement points is small and only one point is required, so that the measurement time is short. Therefore, automation becomes easy, cost can be reduced, and the same life determination accuracy as that of a conventional determination method using a permeability meter can be obtained.
【００３０】また、この発明で用いる振動センサの耐熱
温度は３００℃以上であり、透磁率センサの耐熱温度４
０℃に比べはるかに高温となっている。従って、計測の
際に炉温をあまり下げる必要がなく、炉温低下による稼
働率の低下を防止できる。The heat resistance temperature of the vibration sensor used in the present invention is 300 ° C. or more, and the heat resistance temperature of the magnetic permeability sensor is 4 ° C.
The temperature is much higher than 0 ° C. Therefore, it is not necessary to lower the furnace temperature much at the time of measurement, and it is possible to prevent a decrease in the operation rate due to a decrease in the furnace temperature.
【００３１】[0031]
【発明の効果】この発明によれば、炉内搬送ロールの周
波数応答関数を測定して基準となる周波数応答関数と比
較することにより寿命を判定するので、ロール表面の全
面について計測する必要がなく、最低１箇所で振動を計
測すればよい。また、計測装置は、ハンマ等の加振器と
通常の振動検出器でよく、簡便な設備で炉内搬送ロール
の寿命の判定が可能となり、また、比較的高温でも測定
可能なので、ライン停止が短時間で済むという効果があ
る。According to the present invention, the life is determined by measuring the frequency response function of the transfer roll in the furnace and comparing it with the reference frequency response function, so that it is not necessary to measure the entire roll surface. The vibration may be measured at least at one point. In addition, the measuring device may be a vibrator such as a hammer and a normal vibration detector, and the life of the transfer roll in the furnace can be determined with simple equipment, and the measurement can be performed even at a relatively high temperature. There is an effect that it can be completed in a short time.
【図１】発明の寿命判定方法の一例を示す概略図であ
る。FIG. 1 is a schematic view showing an example of a life determining method of the present invention.
【図２】周波数応答関数の一例を示す図である。FIG. 2 is a diagram illustrating an example of a frequency response function.
【図３】加熱炉の概略図である。 （ａ）長手方向断面図 （ｂ）幅方向断面図FIG. 3 is a schematic view of a heating furnace. (A) Longitudinal sectional view (b) Width sectional view
【図４】炉内搬送ロールの斜視図である。FIG. 4 is a perspective view of a transfer roll in a furnace.
１ 加熱炉 ２ 鋼板 ３ 炉内搬送ロール ３１ 胴部 ３２ 軸受部 ４ ブロック ５ 振動センサ ６ 加振器（ハンマ） DESCRIPTION OF SYMBOLS 1 Heating furnace 2 Steel plate 3 Furnace transfer roll 31 Body 32 Bearing 4 Block 5 Vibration sensor 6 Vibrator (hammer)
フロントページの続き (72)発明者 石田 匡平 東京都千代田区丸の内一丁目１番２号 日 本鋼管株式会社内 (72)発明者 平川 猛 東京都千代田区丸の内一丁目１番２号 日 本鋼管株式会社内 Ｆターム(参考） 2G024 AA07 BA12 CA13 DA12 FA04 2G047 AA07 AB01 BC04 BC11 CA03 EA09 Continuing from the front page (72) Inventor Masahei Ishida 1-2-1, Marunouchi, Chiyoda-ku, Tokyo Japan Steel Pipe Co., Ltd. (72) Inventor Takeshi Hirakawa 1-2-1, Marunouchi, Chiyoda-ku, Tokyo Japan Pipe F term in the company (reference) 2G024 AA07 BA12 CA13 DA12 FA04 2G047 AA07 AB01 BC04 BC11 CA03 EA09
Claims (3)
命を判定する炉内搬送ロールの寿命判定方法において、
炉内搬送ロールに所定の加振力を加え、この炉内搬送ロ
ールの振動を計測し、計測された振動から周波数応答関
数を測定し、この周波数応答関数を基準となる周波数応
答関数と比較することにより、炉内搬送ロールの寿命を
判定することを特徴とする炉内搬送ロールの寿命判定方
法。1. A method for determining the life of an in-furnace transfer roll, which determines the life by non-destructively examining the in-furnace transfer roll,
A predetermined excitation force is applied to the transfer roll in the furnace, the vibration of the transfer roll in the furnace is measured, a frequency response function is measured from the measured vibration, and this frequency response function is compared with a reference frequency response function. A method for determining the life of the in-furnace transfer roll.
特徴とする請求項１記載の炉内搬送ロールの寿命判定方
法。2. The method according to claim 1, wherein the vibrating force is applied by a percussive vibration method.
振動についてその振動数の基準値との差に基づき炉内搬
送ロールの寿命を判定することを特徴とする請求項１あ
るいは請求項２記載の炉内搬送ロールの寿命判定方法。3. The method according to claim 1, wherein, when comparing the frequency response functions, the life of the transport roll in the furnace is determined based on a difference between a specific natural vibration and a reference value of the frequency. The method for determining the life of a transfer roll in a furnace as described in the above.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18319298A JP3518345B2 (en) | 1998-06-30 | 1998-06-30 | Life judgment method of transfer roll in furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18319298A JP3518345B2 (en) | 1998-06-30 | 1998-06-30 | Life judgment method of transfer roll in furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000019054A true JP2000019054A (en) | 2000-01-21 |
| JP3518345B2 JP3518345B2 (en) | 2004-04-12 |
Family
ID=16131394
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18319298A Expired - Fee Related JP3518345B2 (en) | 1998-06-30 | 1998-06-30 | Life judgment method of transfer roll in furnace |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3518345B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006035516A (en) * | 2004-07-23 | 2006-02-09 | Japan Polypropylene Corp | Laminated polypropylene film |
| KR100889290B1 (en) * | 2002-08-30 | 2009-03-17 | 재단법인 포항산업과학연구원 | A Method for Calculating the Roll Life in a Continuous Casting |
| US7945351B2 (en) | 2008-12-12 | 2011-05-17 | Vestas Wind Systems A/S | Method for controlling the operation of a wind turbine based on deviation between operating and predetermined frequency response functions |
| WO2016092869A1 (en) * | 2014-12-10 | 2016-06-16 | 原子燃料工業株式会社 | Method for evaluating state of member |
| CN117029473A (en) * | 2023-09-27 | 2023-11-10 | 佛山市景鑫达陶瓷机械有限公司 | Roller kiln broken rod alarm method and system based on visual anti-shake judgment |
-
1998
- 1998-06-30 JP JP18319298A patent/JP3518345B2/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100889290B1 (en) * | 2002-08-30 | 2009-03-17 | 재단법인 포항산업과학연구원 | A Method for Calculating the Roll Life in a Continuous Casting |
| JP2006035516A (en) * | 2004-07-23 | 2006-02-09 | Japan Polypropylene Corp | Laminated polypropylene film |
| US7945351B2 (en) | 2008-12-12 | 2011-05-17 | Vestas Wind Systems A/S | Method for controlling the operation of a wind turbine based on deviation between operating and predetermined frequency response functions |
| WO2016092869A1 (en) * | 2014-12-10 | 2016-06-16 | 原子燃料工業株式会社 | Method for evaluating state of member |
| JPWO2016092869A1 (en) * | 2014-12-10 | 2017-09-28 | 原子燃料工業株式会社 | Method for evaluating the condition of members |
| US11187681B2 (en) | 2014-12-10 | 2021-11-30 | Nuclear Fuel Industries, Limited | Method for evaluating state of member |
| CN117029473A (en) * | 2023-09-27 | 2023-11-10 | 佛山市景鑫达陶瓷机械有限公司 | Roller kiln broken rod alarm method and system based on visual anti-shake judgment |
| CN117029473B (en) * | 2023-09-27 | 2024-03-29 | 佛山市景鑫达陶瓷机械有限公司 | Roller kiln broken rod alarm method and system based on visual anti-shake judgment |
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| Publication number | Publication date |
|---|---|
| JP3518345B2 (en) | 2004-04-12 |
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