JPH08264260A - Direct electrification heating device and direct electrification heating method - Google Patents
Direct electrification heating device and direct electrification heating methodInfo
- Publication number
- JPH08264260A JPH08264260A JP6590995A JP6590995A JPH08264260A JP H08264260 A JPH08264260 A JP H08264260A JP 6590995 A JP6590995 A JP 6590995A JP 6590995 A JP6590995 A JP 6590995A JP H08264260 A JPH08264260 A JP H08264260A
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- Japan
- Prior art keywords
- heated
- heating
- electrodes
- electrode
- width
- Prior art date
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Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、直接通電によるジュー
ル発熱を利用した被加熱材の加熱装置および加熱方法に
関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heating device and a heating method for a material to be heated which utilizes Joule heat generated by direct energization.
【０００２】[0002]
【従来の技術】走行材の加熱方法としては、従来から
バーナーや炉を用いた加熱によるもの、誘導加熱によ
るものが広く実用化されている。ここで、は外部の熱
源から発生する熱を輻射と熱伝達により被加熱材に供給
して加熱するものである。このため、高速で走行する被
加熱材を加熱するには熱源の温度を上げるか、もしくは
加熱ゾーン長を長くして加熱時間を確保することが必要
であり、前者は熱源および耐火物の耐久性と被加熱材表
面が過熱される等の問題があるため、限度がある。また
後者は、連続焼鈍のような大規模な設備を用いて長い経
路を走行させて被加熱材を加熱するため、莫大な費用の
設備投資が必要である。2. Description of the Related Art As a method for heating a running material, a heating method using a burner or a furnace and an induction heating method have been widely put into practical use. Here, is for supplying heat generated from an external heat source to the material to be heated by radiation and heat transfer for heating. Therefore, to heat the material to be heated that runs at high speed, it is necessary to raise the temperature of the heat source or to lengthen the heating zone length to secure the heating time. Since there is a problem that the surface of the heated material is overheated, there is a limit. In the latter case, a large-scale equipment such as continuous annealing is used to run a long route to heat the material to be heated, and thus enormous capital investment is required.
【０００３】次に、は高周波を用いて渦電流損を熱に
変えて加熱するものである。このため、高価な高周波電
源とコイルが必要であり、特に被加熱材が非磁性体の場
合や、形状（板幅、板厚等）が多様な処理ラインでは加
熱効率が30〜80％と変動するため、安定して高い加熱効
率を維持することが極めて困難である。したがって、設
備および加熱コストが非常に高くなるため、被加熱材全
体の加熱にはあまり適用されておらず、エッジヒータ等
の局部加熱に用いられることが多い。Next, the high frequency is used to convert the eddy current loss into heat for heating. For this reason, an expensive high-frequency power source and coil are required, especially when the material to be heated is a non-magnetic material or in a processing line with various shapes (plate width, plate thickness, etc.), the heating efficiency fluctuates to 30-80%. Therefore, it is extremely difficult to stably maintain a high heating efficiency. Therefore, the equipment and the heating cost are very high, so that it is not applied to heating the entire material to be heated so much and is often used for local heating such as an edge heater.
【０００４】近年、被加熱材に直接通電しジュール熱に
より加熱する通電加熱方法が注目されている。In recent years, attention has been paid to an electric heating method in which a material to be heated is directly energized and heated by Joule heat.
【０００５】図８は、従来の通電加熱装置の一例を示す
側面図（ａ）および加熱状況（ｂ）を示す図である。被
加熱材１の走行方向（長手方向）に所定の間隔で設けら
れた給電ロール９を電極として用い、また被加熱材１の
給電ロール９と対向する側には押さえロール１０が設け
られている。そして、走行方向に隔てられた給電ロール
９、９間に電源７により短絡部材６を介して通電するこ
とで、給電ロール９、９間の被加熱材１が加熱される。
さらに、被加熱材１を走行させながら加熱することによ
り、被加熱材１は順次全長に亘って加熱されていく。FIG. 8 is a side view (a) and a heating condition (b) showing an example of a conventional electric heating device. The feeding rolls 9 provided at predetermined intervals in the running direction (longitudinal direction) of the material to be heated 1 are used as electrodes, and a pressing roll 10 is provided on the side of the material to be heated 1 facing the power feeding roll 9. . Then, the material to be heated 1 between the power supply rolls 9 and 9 is heated by energizing the power supply rolls 9 and 9 separated in the traveling direction by the power source 7 through the short-circuit member 6.
Furthermore, by heating the material to be heated 1 while traveling, the material to be heated 1 is sequentially heated over the entire length.
【０００６】しかし、図８のような加熱方式では、２つ
の電極（給電ロール９）を間隔Ｌだけ離した状態で加熱
するため、図８（ｂ）に示されるように、被加熱材の長
手方向端部、すなわち被加熱材の先端部分（図のTOP 位
置）や後端部分（図のBOTTOM位置）では電極間距離Ｌの
長さだけ目標温度に対して加熱が不十分な部分が発生す
る。そのため、これらの加熱不十分部分を切除すること
となり歩留が低下するという問題があった。However, in the heating method as shown in FIG. 8, since the two electrodes (power feeding rolls 9) are heated in the state of being separated by the distance L, as shown in FIG. In the end portion in the direction, that is, at the front end portion (TOP position in the figure) and rear end portion (BOTTOM position in the figure) of the material to be heated, there is a portion where heating is insufficient for the target temperature by the distance L between the electrodes. . Therefore, there is a problem in that these insufficiently heated portions are removed and the yield is reduced.
【０００７】また、この問題を回避するため、特開平2-
111817号公報には、上流側あるいは下流側の電極を被加
熱材の走行方向に移動可能とし、先端部分や後端部分の
通電加熱時に電極間隔を変えながら通電することで、で
きるだけ加熱が不十分となる部分を短くする方法が開示
されている。Further, in order to avoid this problem, JP-A-2-
In the 111817 publication, the upstream or downstream electrode can be moved in the traveling direction of the material to be heated, and the heating is insufficient as much as possible by energizing while changing the electrode interval when energizing the leading end and the trailing end. A method of shortening the portion that becomes
【０００８】図９は、特開平2-111817号公報に開示され
た加熱装置の側面図である。この装置でも図８に示した
装置と同様に、電極となる給電ロール９と押さえロール
１０からなる上下一対のロール群を被加熱材１の走行方
向に所定の間隔で設け、給電ロール９、９間に電源７に
より短絡部材６を介して通電することで、その間の被加
熱材１を加熱する。さらに、上記ロール群の一方（図で
は右側のロール群）を走行方向に移動可能とし、被加熱
材１の先端部分または後端部分を通電加熱する際には、
破線で示したロール群のように給電ロール９、９間の距
離をＬ１と狭くし、通常は図中の矢印で示すように、給
電ロール９、９間の距離を（Ｌ１＋Ｌ２）と広げて通電
加熱することで、被加熱材１の長手方向端部の加熱不十
分な部分を少なくするものである。FIG. 9 is a side view of the heating device disclosed in Japanese Patent Laid-Open No. 2-111817. Also in this device, as in the device shown in FIG. 8, a pair of upper and lower roll groups including a feeding roll 9 serving as an electrode and a pressing roll 10 are provided at predetermined intervals in the traveling direction of the material to be heated 1, and the feeding rolls 9 and 9 are provided. The material 1 to be heated in the meantime is heated by supplying electricity through the short-circuit member 6 by the power supply 7 in the meantime. Furthermore, when one of the roll groups (the roll group on the right side in the figure) is made movable in the traveling direction, and the front end portion or the rear end portion of the material to be heated 1 is electrically heated,
Like the roll group shown by the broken line, the distance between the power feeding rolls 9 and 9 is narrowed to L1, and normally, the distance between the power feeding rolls 9 and 9 is widened to (L1 + L2) as shown by the arrow in the figure to conduct electricity. By heating, the insufficiently heated portion of the end portion in the longitudinal direction of the material to be heated 1 is reduced.
【０００９】しかし、この方法であっても被加熱材の先
後端部分にＬ１の長さの部分だけ加熱不十分な部分が残
り、被加熱材の先端部分から後端部分まで全長に亘って
目標温度に加熱することはできない。また、この方法で
は極間すなわち上流側電極と下流側電極の間隔を０（ゼ
ロ）にしない限りこの加熱不十分な部分が残ってしま
う。However, even with this method, an insufficiently heated portion of the length L1 remains at the front and rear end portions of the material to be heated, and the entire length from the front end portion to the rear end portion of the heated material is targeted. It cannot be heated to temperature. Further, in this method, unless the distance between the electrodes, that is, the distance between the upstream electrode and the downstream electrode is set to 0 (zero), this insufficiently heated portion remains.
【００１０】[0010]
【発明が解決しようとする課題】本発明の目的は、設備
の小型化および高い加熱効率で被加熱材の先端部分や後
端部分を所定の温度に加熱でき、より一層の歩留の向上
等が達成可能な直接通電加熱装置および加熱方法を提供
することにある。SUMMARY OF THE INVENTION The object of the present invention is to downsize the equipment and heat the material to be heated to a predetermined temperature with its high heating efficiency, and further improve the yield. To provide a direct current heating device and a heating method.
【００１１】[0011]
【課題を解決するための手段】ここに本発明は、直接通
電によるジュール発熱を利用して被加熱材を加熱する直
接通電加熱装置において、被加熱材の両幅端部に接触可
能にかつ被加熱材の幅方向に対向させた複数個の電極を
備え、各電極が個々に通電可能であると共に、前記電極
を被加熱材幅方向および／または上下方向に移動可能と
した直接通電加熱装置である。DISCLOSURE OF THE INVENTION The present invention is directed to a direct current heating apparatus for heating a material to be heated by utilizing Joule heat generated by direct current application, so that both width ends of the material to be heated can be contacted with each other. A direct current heating device comprising a plurality of electrodes opposed to each other in the width direction of the heating material, each electrode being individually energizable, and the electrodes being movable in the width direction and / or the up-down direction of the material to be heated. is there.
【００１２】また、直接通電によるジュール発熱を利用
して被加熱材を加熱する直接通電加熱方法において、被
加熱材の幅方向に対向させた複数個の電極を、被加熱材
の長手方向端部の両幅端部に接触させ、個々の電極に通
電して被加熱材の長手方向端部を通電加熱すると共に、
被加熱材を走行方向に所定の距離を隔てて設置された複
数の電極間で走行通電加熱して、全長に亘って被加熱材
を所定の温度に加熱する直接通電加熱方法である。Further, in the direct current heating method for heating a material to be heated by utilizing Joule heat generated by direct current application, a plurality of electrodes opposed to each other in the width direction of the material to be heated are connected to a longitudinal end portion of the material to be heated. While contacting both width ends of each of the electrodes to energize each electrode to electrically heat the longitudinal end of the material to be heated,
This is a direct energization heating method in which the material to be heated is heated by running and energized between a plurality of electrodes installed at a predetermined distance in the traveling direction, and the material to be heated is heated to a predetermined temperature over the entire length.
【００１３】[0013]
【作用】まず、本発明の加熱装置について説明する。First, the heating device of the present invention will be described.
【００１４】図１は、本発明の通電加熱装置の一例を示
す平面図（ａ）および側面図（ｂ）である。被加熱材１
の長手方向端部（図では先端部分）に、幅方向に対向す
る形で、被加熱材１の長手方向に所定の間隔で複数個の
電極２が設けられている。図では左側幅端部には４個の
電極（２ａ、２ｂ、２ｃ、２ｄ）、右側幅端部にも４個
の電極（２ｅ、２ｆ、２ｇ、２ｈ）が設けられている。
これらの電極２はそれぞれ個々に接続端子を有してお
り、対向した電極間（左側の電極と右側の電極間）で通
電する電極対を適宜選択できるようにしている。図では
電極２ａと電極２ｅを接続させているが、少なくとも左
右１個ずつの電極２を短絡部材６と接続することで、電
源７により被圧延材１に電流が流れ、被圧延材１が加熱
される。FIG. 1 is a plan view (a) and a side view (b) showing an example of the electric heating apparatus of the present invention. Heated material 1
A plurality of electrodes 2 are provided at a predetermined interval in the longitudinal direction of the material to be heated 1 so as to face each other in the width direction at the longitudinal end portion (the tip portion in the figure) of the. In the figure, four electrodes (2a, 2b, 2c, 2d) are provided on the left side width end, and four electrodes (2e, 2f, 2g, 2h) are also provided on the right side width end.
Each of these electrodes 2 has a connection terminal so that an electrode pair that conducts electricity between the opposing electrodes (between the left electrode and the right electrode) can be appropriately selected. In the figure, the electrodes 2a and 2e are connected, but by connecting at least one left and right electrode 2 to the short-circuit member 6, a current flows through the material 1 to be rolled by the power supply 7 and the material 1 to be rolled is heated. To be done.
【００１５】電極２は、金属に代表される導電性材料に
よって製作され、例えば銅等の材質が好ましく、鉛や錫
といった融点の低い金属を液体状にすることで被圧延材
１との接触抵抗を極力小さくすることもできる。また、
被加熱材１の端部での過熱や電極２の発熱を防止するた
めの冷却機構を備えても良い。The electrode 2 is made of a conductive material typified by a metal. For example, a material such as copper is preferable, and a metal having a low melting point such as lead or tin is made into a liquid state so that the contact resistance with the material 1 to be rolled is increased. Can be made as small as possible. Also,
A cooling mechanism for preventing overheating at the end of the material to be heated 1 and heat generation of the electrode 2 may be provided.
【００１６】本発明装置では、被加熱材１の両幅端部に
電極２を接触させるが、図では、被加熱材１の幅端部を
両側から挟み込むように、被加熱材１の幅端部側面に電
極２を接触させている。In the apparatus of the present invention, the electrodes 2 are brought into contact with both width ends of the material to be heated 1. In the figure, the width ends of the material to be heated 1 are sandwiched from both sides. The electrode 2 is in contact with the side surface of the part.
【００１７】また、各電極２は個々に通電可能としてい
るため、対向する電極間で通電させる電極２を適宜選択
することで、被加熱材１の加熱部位を選択できる。ま
た、各電極間で通電する電流量、通電時間や投入電力量
を調整することで、被加熱材１の加熱温度を制御するこ
とができる。Since each of the electrodes 2 can be individually energized, the heating portion of the material to be heated 1 can be selected by appropriately selecting the electrodes 2 to be energized between the opposing electrodes. In addition, the heating temperature of the material to be heated 1 can be controlled by adjusting the amount of current flowing between the electrodes, the duration of the current flow, and the amount of power input.
【００１８】さらに、電極２は被加熱材１の幅方向に移
動可能としている。これは、被加熱材１と電極２を接触
させて通電するが、被加熱材１の全長に亘って本発明装
置を用いて加熱する場合であっても、被加熱材１の幅方
向での変動があった場合、その変動に追従して移動する
ことができる。Further, the electrode 2 is movable in the width direction of the material to be heated 1. This is because the material to be heated 1 and the electrode 2 are brought into contact with each other to conduct electricity, but even when heating is performed using the device of the present invention over the entire length of the material to be heated 1, the width direction of the material to be heated 1 is increased. When there is a change, the user can move following the change.
【００１９】また、被加熱材１の全長でなく長手方向の
特定部分のみを加熱する場合には、通電加熱時は被加熱
材１の幅両端部に接触するように被加熱材１の方へ移動
させ、通電加熱を行わない時は、被加熱材１が走行する
際の接触による被加熱材１や電極２との接触による疵等
の発生を防止するため、電極２を被加熱材１から遠ざか
る方向に退避させる。図１では、電極２を、図中の矢印
に示すように、被加熱材１の幅方向に移動可能としてい
る。When heating not only the entire length of the material to be heated 1 but only a specific portion in the longitudinal direction, the material to be heated 1 is contacted with both ends of the width of the material to be heated 1 during electric heating. In order to prevent the occurrence of flaws or the like due to contact with the material to be heated 1 or the electrode 2 due to contact when the material to be heated 1 travels, the electrode 2 is removed from the material to be heated 1 when the material to be heated 1 is moved and is not electrically heated. Evacuate in the direction away from you. In FIG. 1, the electrode 2 is movable in the width direction of the material to be heated 1, as indicated by the arrow in the figure.
【００２０】そのため、電極２は圧力シリンダなどの空
圧、油圧式で、あるいはギアやモータなどの組み合わせ
で被加熱材の幅方向や上下方向に移動可能な機構とす
る。また、移動機構は個々の電極２毎に設けても、複数
個の電極２毎に設けてもよい。Therefore, the electrode 2 is a pneumatic cylinder such as a pressure cylinder, a hydraulic type, or a mechanism capable of moving in the width direction or the vertical direction of the material to be heated by a combination of gears and motors. The moving mechanism may be provided for each individual electrode 2 or for each of the plurality of electrodes 2.
【００２１】図２は、本発明の通電加熱装置の別の例を
示す平面図（ａ）および加熱状況（ｂ）を示す図であ
る。電極２は被加熱材１に直接接触せずに、電気的に接
続された導電部材３を介して接触するようにしており、
電極２からの電流が導電部材３を介して被加熱材１に流
れるようにしている。これは、電極２を被加熱材１と直
接接触させた場合、接触状態によってはその接触部で電
流集中が起こり、接触部が異常発熱する可能性がある。
そのため、良導電性の導電部材３を介して被加熱材１に
通電するためである。このように、被加熱材１と電極２
の接触状態が不安定な場合は、電極２を被加熱材１に直
接接触させずに、導電部材３を介して通電させる方が好
ましい。FIG. 2 is a plan view (a) and a heating condition (b) showing another example of the electric heating apparatus of the present invention. The electrode 2 is not in direct contact with the material to be heated 1 but is in contact therewith via the electrically conductive member 3 electrically connected,
The current from the electrode 2 is made to flow to the material to be heated 1 via the conductive member 3. This is because, when the electrode 2 is brought into direct contact with the material to be heated 1, current concentration may occur at the contact portion depending on the contact state, and the contact portion may generate abnormal heat.
Therefore, the material to be heated 1 is energized through the conductive member 3 having good conductivity. In this way, the material to be heated 1 and the electrode 2 are
If the contact state is unstable, it is preferable that the electrode 2 is not brought into direct contact with the material to be heated 1 but energized through the conductive member 3.
【００２２】導電部材３の材質としては導電性の良好な
銅等が望ましく、電気抵抗が低いほど部材内での損失が
少ないため、被加熱材１との接触断面積を大きくした
り、あるいは液体窒素、液体ヘリウム等で極低温に保持
することにより、電気抵抗を極めて小さくすることがで
きる。また、近年研究が行われている超伝導材料を導電
部材３として用いることも可能である。The material of the conductive member 3 is preferably copper or the like having good conductivity, and the lower the electric resistance, the less the loss in the member. Therefore, the contact cross-sectional area with the material to be heated 1 is increased, or the liquid is liquid. By maintaining the temperature at an extremely low temperature with nitrogen, liquid helium or the like, the electric resistance can be made extremely small. It is also possible to use a superconducting material, which has been studied in recent years, as the conductive member 3.
【００２３】また、導電部材３の被加熱材１との接触面
は平滑面でも良いが、接触抵抗を小さくするため細かい
ピッチの凹凸面にしても良く、さらには被加熱材１の接
触する部分の形状に合わせて変形可能な導電材料を用い
ることもできる。The contact surface of the conductive member 3 with the material to be heated 1 may be a smooth surface, but it may be an uneven surface with a fine pitch in order to reduce the contact resistance. It is also possible to use a conductive material that can be deformed according to the shape of.
【００２４】さらに、被加熱材１端部での過熱を防止す
るため、あるいは導電部材３自体の発熱を防止するため
の冷却機構を備えても良い。Further, a cooling mechanism for preventing overheating at the end of the material to be heated 1 or for preventing heat generation of the conductive member 3 itself may be provided.
【００２５】図３は、本発明の通電加熱装置のさらに別
の例を示す平面図（ａ）および側面図（ｂ）である。こ
の図では導電部材３を一体化し、その上に複数個の電極
２を被加熱材１の長手方向に所定の間隔で設けている。
一体化した導電部材を用いることで、被加熱材１と導電
部材３との接触する面積が増えるため、接触不安定によ
る加熱不足や局部的に電力集中による異常発熱が防止さ
れより効率的な通電が可能となる。FIG. 3 is a plan view (a) and a side view (b) showing still another example of the electric heating apparatus of the present invention. In this figure, a conductive member 3 is integrated, and a plurality of electrodes 2 are provided on the conductive member 3 at predetermined intervals in the longitudinal direction of the material to be heated 1.
By using the integrated conductive member, the area of contact between the material to be heated 1 and the conductive member 3 increases, so insufficient heating due to unstable contact and abnormal heat generation due to local power concentration are prevented, and more efficient energization is performed. Is possible.
【００２６】さらにこの例では、導電部材３は被加熱材
１の幅端部側面に接するのではなく、幅端部の上面に接
触させている。被加熱材１の幅端部は長手方向に幅のば
らつきがあったり、幅端部側面の形状が丸みを持ってい
たり、さらには疵があったりするが、幅端部の上面や下
面は平坦なため電極２や導電部材３と被加熱材１との接
触状態が安定し易い。Further, in this example, the conductive member 3 is not in contact with the side surface of the width end portion of the material to be heated 1, but is in contact with the upper surface of the width end portion. The width end portion of the material to be heated 1 has a variation in width in the longitudinal direction, the side surface of the width end portion has a rounded shape, and further has a flaw, but the upper and lower surfaces of the width end portion are flat. Therefore, the contact state between the electrode 2 or the conductive member 3 and the material to be heated 1 is easily stabilized.
【００２７】また、この場合は導電部材３と一体とした
電極２を被加熱材１の板端部上に設けて接触させるた
め、電極２を移動させる場合は、幅方向に移動させてよ
いが上下方向へ移動させる方が簡便である。このよう
に、電極２を移動させる場合は、被加熱材１の幅方向、
上下方向いずれでもよく、幅方向と上下方向を組み合わ
せた方向に移動させてもよい。Further, in this case, the electrode 2 integrated with the conductive member 3 is provided on the plate end of the material to be heated 1 and is brought into contact therewith. Therefore, when the electrode 2 is moved, it may be moved in the width direction. It is easier to move vertically. In this way, when the electrode 2 is moved, the width direction of the heated material 1,
It may be either in the vertical direction or in a combination of the width direction and the vertical direction.
【００２８】図４は、本発明の通電加熱装置の別の例を
示す平面図（ａ）および側面図（ｂ）である。被加熱材
１の両幅端部に長手方向に所定の間隔で設ける複数個の
電極を縦型の給電ロール４としたものである。電極を被
加熱材１の走行と共に回転可能なロール形状とすること
により、走行状態の被加熱材１に給電ロール４を接触さ
せても被加熱材１とのスリップによる側面への疵発生は
起こらない。さらに、被加熱材１とは面または点接触と
なるが、被加熱材側面の凹凸にも追従が可能なため、よ
り安定した通電が可能である。FIG. 4 is a plan view (a) and a side view (b) showing another example of the electric heating apparatus of the present invention. A plurality of electrodes are provided on both width ends of the material to be heated 1 at predetermined intervals in the longitudinal direction to form a vertical feed roll 4. By forming the electrode into a roll shape that can rotate as the material to be heated 1 travels, even if the feeding roll 4 is brought into contact with the material to be heated 1 in the running state, the occurrence of flaws on the side surface due to the slip with the material to be heated 1 occurs. Absent. Further, although it makes a surface or point contact with the material to be heated 1, it is possible to follow irregularities on the side surface of the material to be heated, so that more stable energization is possible.
【００２９】また、給電ロール４にＶ溝等の溝を設けた
形状として、被加熱材１の幅端部を挟み込むことによ
り、被加熱材１の上下方向への変動に追従させることも
可能である。また、この場合も電極２は導電部材３と共
に被加熱材１の幅方向に移動可能とするが、上下方向へ
の被加熱材の移動に追従できるように上下方向へも移動
可能としてもよい。Further, it is possible to follow the vertical fluctuation of the material to be heated 1 by sandwiching the width end of the material to be heated 1 in a shape in which the power feeding roll 4 is provided with a groove such as a V groove. is there. Also in this case, the electrode 2 is movable in the width direction of the material to be heated 1 together with the conductive member 3, but may be movable in the vertical direction so as to follow the movement of the material to be heated in the vertical direction.
【００３０】給電ロール４は金属に代表される導電性材
料によって製作され、中実もしくは中空構造であって、
ロール材質は固有抵抗の低い導電性に優れた銅等の材料
あるいは高温での強度、耐酸化性、耐食性が必要な場合
には耐熱ステンレス鋼等を用いてもよい。給電ロール４
には、それぞれ軸端部に摺動子を介して、銅等の導電性
に優れた短絡部材６により電気的に短絡接続されてい
る。この短絡部材６は先に述べた本発明装置による加熱
の場合に用いる導電部材３と同様の性質をもつ。The feeding roll 4 is made of a conductive material typified by metal and has a solid or hollow structure.
As the roll material, a material such as copper having a low specific resistance and excellent conductivity, or heat resistant stainless steel or the like may be used when strength at high temperature, oxidation resistance and corrosion resistance are required. Power supply roll 4
Are electrically short-circuited to the shaft ends via a slider by a short-circuit member 6 having excellent conductivity such as copper. The short-circuit member 6 has the same properties as the conductive member 3 used in the case of heating by the device of the present invention described above.
【００３１】そして、短絡部材６は電源７に接続されて
いる。The short-circuit member 6 is connected to the power supply 7.
【００３２】図５は、本発明の通電加熱装置のさらに別
の例を示す平面図（ａ）および側面図（ｂ）である。こ
の図では、被加熱材の両幅端部の上下面に狭幅の横型ロ
ールを設置したものである。例えば、上面側のロールを
電極となる給電ロール４、下側のロールを押さえロール
５とし、幅方向に対向する給電ロール間に通電すること
で被加熱材１を加熱することができる。さらに、先にも
述べたように、幅端部の上下面は平坦なため電極となる
給電ロール４と被加熱材１との接触状態が安定する。FIG. 5 is a plan view (a) and a side view (b) showing still another example of the electric heating apparatus of the present invention. In this drawing, narrow horizontal rolls are installed on the upper and lower surfaces of both width ends of the material to be heated. For example, the material to be heated 1 can be heated by supplying electricity between the power supply rolls 4 which are the electrodes on the upper side and the pressing rolls 5 on the lower side, and which are opposed to each other in the width direction. Further, as described above, since the upper and lower surfaces of the width end are flat, the contact state between the power supply roll 4 serving as an electrode and the material to be heated 1 is stable.
【００３３】ここで、押さえロール５は空圧あるいは油
圧による圧下機構を有しており、その材質は耐熱の点で
許容されればゴム等の高偏平が達成できるものが望まし
いが、熱間域まで加熱する場合は金属を用いるのが望ま
しい。Here, the pressing roll 5 has a reduction mechanism by pneumatic pressure or hydraulic pressure, and it is desirable that the material of the pressing roll 5 can achieve a high flatness such as rubber if it is allowed in terms of heat resistance. When heating up to, it is desirable to use a metal.
【００３４】また、この図では被加熱材の上面に給電ロ
ール４を下面に押さえロール５を設けているが、逆に上
面には押さえロール５を下面に給電ロール４を設けても
よい。Further, in this drawing, the feeding roll 4 is provided on the upper surface of the material to be heated and the pressing roll 5 is provided on the lower surface, but conversely, the pressing roll 5 may be provided on the upper surface and the feeding roll 4 may be provided on the lower surface.
【００３５】以上説明したように、本発明の直接通電加
熱装置を用いることにより、従来の装置では加熱が不十
分となる被加熱材の長手方向端部であっても、高い加熱
効率で所定の温度に加熱することができる。As described above, by using the direct current heating device of the present invention, even if the end portion in the longitudinal direction of the material to be heated, which is insufficiently heated by the conventional device, a predetermined heating efficiency is achieved. It can be heated to temperature.
【００３６】次に、本発明の直接通電加熱方法につき、
具体的例を挙げて説明する。Next, the direct electric heating method of the present invention will be described.
A specific example will be described.
【００３７】図２（ａ）のように、被加熱材１の長手方
向先端部が、電極２を取り付けた導電部材３からなる本
発明装置を設けてある位置に来た時に、移動機構（図示
していない）により、被加熱材１の長手方向先端部を幅
方向両端部から挟み込むように導電部材３と共に電極２
を移動させる。その位置決めについては、被加熱材１の
走行によって、または走行方向（被加熱材１の長手方
向）での微調整のための移動により定めてもよく、ま
た、被加熱材１を走行、停止させた後、所定の位置まで
電極２を走行方向に移動させてもよい。また、電極２
（導電部材３）の移動は、個々の電極毎にまたは複数個
の電極毎に行ってもよい。As shown in FIG. 2 (a), when the longitudinal tip of the material to be heated 1 reaches a position where the device of the present invention composed of the conductive member 3 to which the electrode 2 is attached is provided, the moving mechanism (FIG. (Not shown), so that the tip end portion in the longitudinal direction of the material to be heated 1 is sandwiched from both end portions in the width direction together with the conductive member 3 and the electrode 2
To move. The positioning may be determined by the traveling of the material to be heated 1 or the movement for fine adjustment in the traveling direction (longitudinal direction of the material to be heated 1). After that, the electrode 2 may be moved to a predetermined position in the traveling direction. Also, the electrode 2
The movement of the (conductive member 3) may be performed for each individual electrode or for each of a plurality of electrodes.
【００３８】導電部材３で被加熱材１を挟み込んだ後、
まず電極２ａ−２ｅ間にｔ1 秒間通電し、電極２ａ−２
ｅ間に位置する被加熱材１を通電加熱する。次に、電極
２ｂ、２ｆに切り替えて電極２ｂ−２ｆ間にｔ2 秒間通
電する。以下同様に電極２ｃ、２ｇおよび２ｄ、２ｈへ
と切り替え、電極２ｃ−２ｇ間にｔ3 秒間、電極２ｄ−
２ｈ間にｔ4 秒間通電する。この時、投入電力量を一定
とした場合には、通電時間をｔ1 ＞ｔ2 ＞ｔ3 ＞ｔ4 と
することで、図２（ｂ）に示すような温度勾配で被加熱
材１の先端部の長さＬの部分を加熱することができる。After the material to be heated 1 is sandwiched by the conductive members 3,
First, the electrodes 2a-2e are energized for t 1 seconds, and the electrodes 2a-2
The material to be heated 1 located between e is electrically heated. Next, the electrodes 2b and 2f are switched to energize between the electrodes 2b and 2f for t 2 seconds. Similarly, the electrodes 2c, 2g and 2d, 2h are switched to the electrode 2c-2g for t 3 seconds, and the electrode 2d-
Energize for 4 seconds during 2 hours. At this time, when the amount of input electric power is constant, the energization time is set to t 1 > t 2 > t 3 > t 4 so that the material 1 to be heated 1 has a temperature gradient as shown in FIG. It is possible to heat the length L of the tip.
【００３９】あるいは、逆に通電時間をｔ1 ＝ｔ2 ＝ｔ
3 ＝ｔ4 を一定として電極２を順次切り替え、投入電力
量をその都度制御して図２（ｂ）のような温度履歴を得
るようにしてもよい。また、各々の電極間での通電時
間、投入電力量を共に制御してもよい。On the contrary, the energization time is t 1 = t 2 = t
It is also possible to switch the electrodes 2 sequentially while keeping 3 = t 4 constant and control the amount of applied electric power each time to obtain the temperature history as shown in FIG. 2B. Further, the energization time and the amount of applied power between the electrodes may be controlled together.
【００４０】さらに、電極２ａ−２ｅのように走行方向
に対して直角に対向する電極間で通電するのではなく、
例えば電極２ａ−２ｆ間等のように左右各々１個ずつの
電極間で通電させてもよい。また、左右１個ずつではな
く、左右で通電する電極の数を変更してもよい。さらに
は、全ての電極に同時に通電を開始して通電時間を個々
の電極間で変えることにより、被加熱材１の長手方向端
部に所望の温度勾配となる温度履歴を与えることができ
る。Furthermore, instead of energizing between the electrodes facing each other at a right angle to the traveling direction like the electrodes 2a-2e,
For example, electricity may be applied between the left and right electrodes, such as between the electrodes 2a-2f. Further, the number of electrodes to be energized on the left and right sides may be changed instead of one on each side. Further, by starting to energize all the electrodes at the same time and changing the energizing time between the individual electrodes, it is possible to give a temperature history having a desired temperature gradient to the end portion in the longitudinal direction of the material to be heated 1.
【００４１】一方、本発明装置を用いて被加熱材１の後
端部分を加熱する場合も、先端部分と逆の温度勾配が得
られるように、例えば、通電時間をｔ1 ＜ｔ2 ＜ｔ3 ＜
ｔ4となるようにして加熱することにより、図２（ｂ）
と傾きが逆の温度履歴を得ることができる。On the other hand, when the rear end portion of the material to be heated 1 is heated using the apparatus of the present invention, for example, the energization time is t 1 <t 2 <t so that a temperature gradient opposite to that of the front end portion can be obtained. 3 <
By heating so as to reach t 4 , as shown in FIG.
It is possible to obtain the temperature history having the opposite slope.
【００４２】また、図２に示す本発明装置を用いて通電
加熱する場合は、被加熱材１を静止させた状態で加熱し
てもよいが、被加熱材１が走行状態の時に、電極２（ま
たは電極２を取り付けた導電部材３）を被加熱材１の端
部と接触させ、被加熱材１の走行と同じ速度で電極２
（導電部材３）を移動させて（被加熱材１と電極２とが
相対的に静止状態で）通電加熱し、所定の温度までの加
熱が終了後電極２（導電部材３）を退避させてもよい。When the apparatus of the present invention shown in FIG. 2 is used for electric heating, the material to be heated 1 may be heated while it is stationary. (Or the conductive member 3 to which the electrode 2 is attached) is brought into contact with the end of the heated material 1, and the electrode 2 is moved at the same speed as the running of the heated material 1.
The (conductive member 3) is moved (currently, the material to be heated 1 and the electrode 2 are relatively stationary) to be electrically heated, and after heating to a predetermined temperature is completed, the electrode 2 (conductive member 3) is retracted. Good.
【００４３】しかし、図４のように、ロールを電極とし
て用いた場合は、予め被加熱材１の幅と同等か若干狭い
幅に幅方向で対向する給電ロール４の間隔を調整してお
くことで、被加熱材１の先端部分が走行して給電ロール
４と接触してもロールの回転により、電極が破損するこ
とがないため、被加熱材１と電極を相対的に静止状態と
して通電加熱する必要はない。また、図５の装置でも、
上下のロール位置を予め被加熱材１の幅間隔にほぼ合わ
せておけばよい。However, when the rolls are used as electrodes as shown in FIG. 4, the interval between the power supply rolls 4 facing each other in the width direction should be adjusted in advance to a width equal to or slightly narrower than the width of the material to be heated 1. Therefore, even if the tip portion of the material to be heated 1 travels and comes into contact with the power feeding roll 4, the electrode is not damaged due to the rotation of the roll. Therefore, the material to be heated 1 and the electrode are relatively stationary and electrically heated. do not have to. Also, with the device of FIG.
The upper and lower roll positions may be adjusted substantially in advance to the width interval of the material to be heated 1.
【００４４】さらに、長手方向に所定の間隔で複数個設
けられた給電ロール４の個々のロールに被加熱材１が接
触した時点で、左右の対向する給電ロール４間に通電さ
せていけばよい。被加熱材１の先端部分の加熱温度に差
を付ける必要がある場合は、通電させる給電ロール４間
毎に通電時間を変更したり、投入電力量を調整すること
で所望の温度履歴を被加熱材１に与えることができる。Further, when the material to be heated 1 comes into contact with the individual rolls of the power feed rolls 4 provided at predetermined intervals in the longitudinal direction, the power may be applied between the left and right power feed rolls 4 facing each other. . When it is necessary to make a difference in the heating temperature of the tip portion of the material to be heated 1, a desired temperature history is heated by changing the energization time for each of the feeding rolls 4 to be energized or adjusting the input power amount. It can be given to the material 1.
【００４５】なお、被加熱材１の後端部分を加熱する場
合も、同様のロール形状とするメリットがある。Even when the rear end portion of the material to be heated 1 is heated, there is an advantage that the roll shape is similar.
【００４６】上記の本発明装置を用いて、被加熱材の長
手方向端部、すなわち先端部分のみを所定の温度に加熱
した場合は、被加熱材の全長に亘って所定の温度まで加
熱するために、走行通電加熱を組み合わせる。When only the longitudinal end portion of the material to be heated, that is, the tip portion is heated to a predetermined temperature by using the above-described apparatus of the present invention, the heating material is heated to a predetermined temperature over its entire length. In combination with running electric heating.
【００４７】図６は、走行通電加熱装置の一例を示す図
および加熱状況を示す図である。なお、（ａ）は装置の
側面図、（ｂ）はその平面図であり、被加熱材が走行加
熱を開始した時の状況を示す。FIG. 6 is a diagram showing an example of the traveling energization heating device and a diagram showing the heating state. In addition, (a) is a side view of the apparatus and (b) is a plan view thereof, showing a situation when the material to be heated starts running heating.
【００４８】先端部分を本発明装置により加熱された被
加熱材１は、被加熱材１の走行方向に所定の距離Ｌだけ
隔てて設けられた複数（図は２つの場合である）の給電
ロール９を電極とし、それらと上下面で対をなす押さえ
ロール１０で構成されたロール間で、電源７により走行
加熱される。この時、走行方向の上流側あるいは下流側
ロールのいずれか一方は接地されていても良い。The material to be heated 1 whose tip portion is heated by the device of the present invention is a plurality of (in the case of two) power supply rolls provided at a predetermined distance L in the running direction of the material to be heated 1. 9 is used as an electrode, and traveling heating is performed by a power supply 7 between rolls composed of pressing rolls 10 which are paired with the electrodes on the upper and lower sides. At this time, either the upstream or downstream roll in the traveling direction may be grounded.
【００４９】また、給電ロール９は図６のように１個の
広幅ロールで被加熱材１の全幅をカバーする形状だけで
なく、幅方向に分割された複数個の狭幅ロールで構成さ
れていてもよい。Further, the power feeding roll 9 is not limited to a shape in which one wide roll covers the entire width of the material to be heated 1 as shown in FIG. 6, but is composed of a plurality of narrow rolls divided in the width direction. May be.
【００５０】走行通電加熱に用いる給電ロール９は、従
来の走行通電加熱に用いられる給電ロールであり、走行
方向に所定の間隔で隔てられた複数の給電ロール９間に
電流を流して被加熱材１を加熱する方法である。一方、
本発明に用いられる図４や図５に示した給電ロール４
は、幅方向に対向する給電ロール４間に電流を流して被
加熱材１を加熱する方法のため、走行加熱に用いられる
給電ロール９とは区別される。The power supply roll 9 used for running electric current heating is a conventional power supply roll used for running electric current heating, and a current is passed between a plurality of power supplying rolls 9 which are separated by a predetermined interval in the running direction. It is a method of heating 1. on the other hand,
The power supply roll 4 shown in FIGS. 4 and 5 used in the present invention
Is a method of heating the material 1 to be heated by passing an electric current between the power feeding rolls 4 facing each other in the width direction, and is therefore distinguished from the power feeding roll 9 used for running heating.
【００５１】給電ロール９は金属に代表される導電性材
料によって製作され、中実もしくは中空構造であって、
加熱された被加熱材１によりサーマルクラウンが生成し
ないようヒータ等により被加熱材１の温度と同程度まで
加熱するための機能を備えていてもよい。また、ロール
材質は固有抵抗の低い導電性に優れた銅等の材料あるい
は高温での強度、耐酸化性、耐食性が必要な場合には耐
熱ステンレス鋼等を用いてもよい。The power supply roll 9 is made of a conductive material typified by metal and has a solid or hollow structure.
The heating target material 1 may have a function of heating the heating target material 1 to about the same temperature as the heating target material 1 so that a thermal crown is not generated. Further, the roll material may be a material such as copper having a low specific resistance and excellent conductivity, or a heat-resistant stainless steel or the like when strength at high temperature, oxidation resistance and corrosion resistance are required.
【００５２】一方、押さえロール１０は空圧あるいは油
圧による圧下機構を有しており、その材質は耐熱の点で
許容されればゴム等の高偏平が達成できるものが望まし
いが、熱間域まで加熱する場合は金属を用いるのが望ま
しい。また、加熱された被加熱材１によりサーマルクラ
ウンが生成しないように加熱ロール等を用いても良い。On the other hand, the pressing roll 10 has a reduction mechanism by pneumatic pressure or hydraulic pressure, and it is desirable that the material of the pressing roll 10 can achieve a high flatness such as rubber if it is allowed in terms of heat resistance. When heating, it is desirable to use a metal. A heating roll or the like may be used so that the heated material 1 does not generate a thermal crown.
【００５３】給電ロール９は、それぞれ軸端部に摺動子
を介して、銅等の導電性に優れた短絡部材６により電気
的に電源７と接続されている。この短絡部材６は先に述
べた本発明装置による加熱の場合に用いる導電部材３と
同様の性質をもつ。そして、短絡部材６は電源７に接続
されている。The power feeding rolls 9 are electrically connected to the power source 7 through the sliders at the shaft end portions by the short-circuiting members 6 having excellent conductivity such as copper. The short-circuit member 6 has the same properties as the conductive member 3 used in the case of heating by the device of the present invention described above. The short-circuit member 6 is connected to the power supply 7.
【００５４】このような走行加熱により、被加熱材１の
先端部分は長さＬの部分で、図６（ｃ）のように図２
（ｂ）の本発明装置による加熱とは逆の温度勾配の温度
に、また後端部分は図６（ｃ）とは逆の傾きの温度勾配
を有し、それ以外の中央部分は所定の温度に保たれた温
度履歴で被加熱材を加熱することができる。As a result of such running heating, the tip portion of the material to be heated 1 has a length L, as shown in FIG. 6 (c).
6B, the rear end portion has a temperature gradient having an inclination opposite to that in FIG. 6C, and the other central portion has a predetermined temperature. The material to be heated can be heated with the temperature history kept at.
【００５５】図７は、本発明装置と走行通電加熱装置を
組み合わせて加熱した場合の加熱状況を示す図である。
図２（ｂ）の本発明装置による加熱での温度履歴と図６
（ｃ）の走行通電加熱装置による加熱での温度履歴を組
み合わせることで、被加熱材の先端部分から後端部分ま
での全長に亘って均一な温度履歴を得ることができる。FIG. 7 is a diagram showing a heating situation in the case where the apparatus of the present invention and the traveling electric heating apparatus are combined and heated.
FIG. 6 shows a temperature history in heating by the apparatus of the present invention shown in FIG.
A uniform temperature history can be obtained over the entire length from the front end portion to the rear end portion of the material to be heated by combining the temperature history of the heating by the traveling electric heating device of (c).
【００５６】また、上記の説明では、被加熱材の先端部
分から後端部分までを一定の温度に加熱する場合を説明
したが、被加熱材の長手方向で温度変化をつける場合で
も、本発明装置を用いることにより、従来の通電加熱装
置では行えなかった長手方向端部までも含めて容易に温
度制御することができる。さらに、上記説明では、例え
ば図７に示すように、長手方向端部での温度勾配が直線
的に変化する形で説明したが、被加熱材内での伝熱によ
り本発明装置での加熱長さよりも実際の加熱長さが長く
なったり、加熱温度が目標とする温度から変化する場合
がある。また、被加熱材の走行開始や走行終了時に本発
明装置による加熱を行うために所定位置に端部を停止さ
せるために走行速度を落とすことも考えられるため、走
行通電加熱では電力投入量と走行速度により加熱温度が
変化する場合がある。したがい、そのような場合を考慮
して、本発明装置と走行加熱装置による被加熱材の長手
方向端部の加熱に際しては、被加熱材の温度を放射温度
計等で逐次測定してその結果より、走行速度、電力投入
量および通電時間等をフィードバックあるいはフィード
フォワード等で制御することで、所定温度に精度良く被
加熱材を加熱することができる。In the above description, the case where the front end portion and the rear end portion of the material to be heated is heated to a constant temperature has been described. However, even when the temperature is changed in the longitudinal direction of the material to be heated, the present invention is applicable. By using the device, it is possible to easily control the temperature including the end portion in the longitudinal direction, which cannot be performed by the conventional electric heating device. Further, in the above description, as shown in FIG. 7, for example, the temperature gradient at the end in the longitudinal direction is linearly changed. However, the heating length in the device of the present invention is increased by the heat transfer in the material to be heated. The actual heating length may become longer than that, or the heating temperature may change from the target temperature. It is also possible to reduce the traveling speed in order to stop the end portion at a predetermined position in order to heat the material to be heated by the device of the present invention at the start or end of traveling. The heating temperature may change depending on the speed. Therefore, in consideration of such a case, when heating the longitudinal end portion of the material to be heated by the device of the present invention and the traveling heating device, the temperature of the material to be heated is sequentially measured with a radiation thermometer or the like and the result is obtained. By controlling the traveling speed, the amount of power input, the energization time, and the like by feedback or feedforward, the material to be heated can be heated to a predetermined temperature with high accuracy.
【００５７】さらに、本発明方法は、走行通電加熱によ
り被加熱材の長手方向端部の加熱が不十分となるため、
本発明装置を組み合わせて加熱不十分な部分をカバーす
ることで被加熱材全長に亘って所定の温度にすることを
目的としている。したがって、走行通電加熱装置のロー
ル間距離Ｌは、走行通電加熱開始時や終了時の被加熱材
長手方向端部の温度履歴が、本発明装置による被加熱材
の長手方向端部の温度履歴を組み合わせて所定の加熱温
度となるように適宜決定すればよい。Further, in the method of the present invention, the heating of the longitudinal end portion of the material to be heated is insufficient due to the electric conduction heating, so that
An object of the present invention is to combine the apparatus of the present invention to cover an insufficiently heated portion so as to maintain a predetermined temperature over the entire length of the material to be heated. Therefore, the roll-to-roll distance L of the traveling energization heating device is determined by the temperature history of the longitudinal end portion of the material to be heated at the start and end of the traveling energization heating by the temperature history of the longitudinal end portion of the material to be heated by the device of the present invention. It may be appropriately determined in combination so as to obtain a predetermined heating temperature.
【００５８】例えば、電極２（導電部材３）が被加熱材
１の先端部分と接触する長さ（図２のＬ）とロール間距
離（図６のＬ）を同じ長さにしてもよいが、実際には、
被加熱材内での伝熱により電極２が接触する長さよりも
長い範囲まで被加熱材１の温度が上昇する。したがい、
伝熱等を考慮して、本発明装置による加熱長さよりも長
いロール間距離であっても構わない。また、走行通電加
熱装置のロール間距離を本発明装置の電極長さよりも小
さくしておき、本発明装置を用いた加熱による被加熱材
の長手方向端部の温度履歴から、走行通電加熱時の通電
条件を制御して、被加熱材を所定の温度に加熱してもよ
い。For example, the length (L in FIG. 2) at which the electrode 2 (conductive member 3) contacts the tip portion of the material to be heated 1 and the distance between rolls (L in FIG. 6) may be the same. ,actually,
Due to heat transfer in the material to be heated, the temperature of the material to be heated 1 rises to a range longer than the contact length of the electrode 2. Therefore,
In consideration of heat transfer and the like, the roll distance may be longer than the heating length of the device of the present invention. In addition, the distance between the rolls of the current-carrying heating device is set smaller than the electrode length of the device of the present invention, and from the temperature history of the longitudinal end portion of the material to be heated by heating using the device of the present invention, when the current-carrying heating is performed. The material to be heated may be heated to a predetermined temperature by controlling the energization conditions.
【００５９】[0059]
【実施例】次に、本発明の効果を具体例に基づき説明す
る。EXAMPLES Next, the effects of the present invention will be described based on specific examples.
【００６０】図１０は、実施例に用いた本発明装置と走
行通電加熱装置を示す側面図である。なお、ここに用い
た本発明装置は、図３に示した導電部材３を一体化し、
その上に４個の電極を設けたものであるが、図３では導
電部材３を被加熱材１の両端部上面に接触させている
が、この実施例では導電部材３を被加熱材１の両端部側
面に接触させている。したがい、導電部材３を被加熱材
１に接触または退避させる移動機構は、被加熱材１の幅
方向へ移動するように設けている。また、走行通電加熱
装置の給電ロール９および押さえロール１０は上下方向
へ移動可能としている。FIG. 10 is a side view showing the device of the present invention and the traveling electric heating device used in the embodiment. The device of the present invention used here has the conductive member 3 shown in FIG.
Although four electrodes are provided on top of this, the conductive member 3 is in contact with the upper surfaces of both ends of the material to be heated 1 in FIG. It is in contact with both side surfaces. Therefore, the moving mechanism for bringing the conductive member 3 into contact with or retracting from the heated material 1 is provided so as to move in the width direction of the heated material 1. Further, the power feeding roll 9 and the pressing roll 10 of the traveling electric heating device can be moved in the vertical direction.
【００６１】実施例で用いた装置および加熱条件等の試
験条件を表１に示す。また、本実施例には、伝熱による
温度均一化を抑制するため表１に示すように熱伝導率の
低いステンレス鋼を被加熱材として供した。Table 1 shows the apparatus used in the examples and test conditions such as heating conditions. Further, in this example, as shown in Table 1, stainless steel having a low thermal conductivity was used as a material to be heated in order to suppress temperature homogenization due to heat transfer.
【００６２】[0062]
【表１】 [Table 1]
【００６３】図１０に示すように、まず被加熱材１の先
端部分を本発明装置が設置されている位置まで走行さ
せ、停止させた後、エアシリンダにより電極２を取り付
けた導電部材３を被加熱材１の先端部分の両幅端部を挟
み込むように移動させる。その後電源からの投入電力量
一定として放射温度計８で被加熱材１の温度を監視しな
がら、通電させる電極の切り替えおよび通電時間の制御
により被加熱材１の先端部分を所定の温度に加熱した
後、導電部材３を両幅端部から遠ざかる方向に退避させ
た。As shown in FIG. 10, first, the tip portion of the material to be heated 1 is moved to a position where the device of the present invention is installed and stopped, and then the conductive member 3 having the electrode 2 attached thereto is covered with an air cylinder. The heating material 1 is moved so as to sandwich both width end portions of the tip end portion thereof. After that, the radiation thermometer 8 was used to monitor the temperature of the material to be heated 1 with the amount of electric power supplied from the power source being constant, and the tip portion of the material to be heated 1 was heated to a predetermined temperature by switching the electrodes to be energized and controlling the energizing time. After that, the conductive member 3 was retracted in a direction away from both width end portions.
【００６４】次に、本発明装置を退避させると共に、図
中の矢印に示すように、上下方向に移動可能な給電ロー
ル９および押さえロール１０を被加熱材１を上下から挟
み込むように移動させた。そして、電源７から電力を投
入して給電ロール９、９間の被加熱材１を加熱しながら
走行加熱を行った。なお、走行加熱中の被加熱材１の温
度は給電ロール９の出側に設けた放射温度計８で測温
し、走行通電加熱時の温度制御を行った。Next, the apparatus of the present invention was retracted, and as shown by the arrow in the figure, the power feeding roll 9 and the pressing roll 10 which were movable in the vertical direction were moved so as to sandwich the material to be heated 1 from above and below. . Then, electric power was supplied from the power source 7 to heat the material 1 to be heated between the power supply rolls 9 and 9 while running heating. The temperature of the material to be heated 1 during traveling heating was measured by a radiation thermometer 8 provided on the outlet side of the power feeding roll 9 to control the temperature during traveling energization heating.
【００６５】さらに、被加熱材１の後端部分が本発明装
置が設置された位置に到達した時点で走行を停止し、給
電ロール９と押さえロール１０を被加熱材１から遠ざか
る方向へ退避させると共に、本発明装置の導電部材３を
被加熱材１の後端部分の両幅端部を挟み込むように移動
させ、放射温度計８で温度を監視しながら電極２を用い
て通電加熱を行った。Further, when the rear end portion of the material to be heated 1 reaches the position where the device of the present invention is installed, the traveling is stopped, and the feeding roll 9 and the pressing roll 10 are retracted in the direction away from the material to be heated 1. At the same time, the conductive member 3 of the device of the present invention was moved so as to sandwich both width end portions of the rear end portion of the material to be heated 1, and the electrode 2 was used to conduct electric heating while monitoring the temperature with the radiation thermometer 8. .
【００６６】また、比較例として図８に示した従来方式
の装置と、図９に示した特開平2-111817号公報に開示さ
れた装置での通電加熱実験も行い、被加熱材１の温度を
先端から後端までの全長に亘って測温した。なお、この
時の条件は表１に示した本発明の走行通電加熱装置の条
件と同じであり、図９の装置については、被加熱材１の
先端部と後端部を加熱する場合は給電ロール間距離を最
小で 200mmと狭めた。Further, as a comparative example, an energization heating experiment was also conducted using the conventional apparatus shown in FIG. 8 and the apparatus disclosed in Japanese Patent Application Laid-Open No. 2-111817 shown in FIG. The temperature was measured over the entire length from the front end to the rear end. The conditions at this time are the same as the conditions of the traveling energization heating device of the present invention shown in Table 1. Regarding the device of FIG. 9, when heating the front end portion and the rear end portion of the material to be heated 1, power is supplied. The distance between rolls has been reduced to a minimum of 200 mm.
【００６７】図１１は、本発明装置と比較装置による通
電加熱時の測温結果を示す図である。FIG. 11 is a diagram showing the temperature measurement results at the time of energization heating by the device of the present invention and the comparison device.
【００６８】図１１から明らかなように、本発明装置で
は被加熱材の先端から後端までの全長に亘って均一な温
度に加熱されている。また、実験中にスパーク発生等の
不都合は観察されず、安定した通電加熱を行うことがで
きた。これに対し、図８や図９に示した比較装置いずれ
の場合でも被加熱材の先端および後端部分での温度が目
標温度に比べ大幅に低くなっている。As is apparent from FIG. 11, in the apparatus of the present invention, the material to be heated is heated to a uniform temperature over the entire length from the front end to the rear end. Further, no inconvenience such as spark generation was observed during the experiment, and stable electric heating could be performed. On the other hand, in any of the comparison devices shown in FIGS. 8 and 9, the temperature at the front and rear ends of the material to be heated is much lower than the target temperature.
【００６９】[0069]
【発明の効果】以上説明したように、本発明装置および
方法による通電加熱において、設備の小型化、耐久性向
上と共に、高い加熱効率で被加熱材の先端部分から後端
部分までの長手方向全長に亘って所定の温度に加熱で
き、歩留の大幅な向上と共に製品特性の向上を達成する
ことができる。As described above, in the electric heating according to the apparatus and method of the present invention, the size and the durability of the equipment are improved, and the total length in the longitudinal direction from the front end portion to the rear end portion of the material to be heated is high with high heating efficiency. It is possible to heat to a predetermined temperature for a long time, and it is possible to achieve a great improvement in yield and an improvement in product characteristics.
【図１】本発明の通電加熱装置の一例を示す平面図およ
び側面図である。FIG. 1 is a plan view and a side view showing an example of an electric heating apparatus of the present invention.
【図２】本発明の通電加熱装置の一例を示す平面図およ
び加熱状況を示す図である。FIG. 2 is a plan view showing an example of an electric heating device of the present invention and a diagram showing a heating situation.
【図３】本発明の通電加熱装置の一例を示す平面図およ
び側面図である。FIG. 3 is a plan view and a side view showing an example of the electric heating apparatus of the present invention.
【図４】本発明の通電加熱装置の一例を示す平面図およ
び側面図である。FIG. 4 is a plan view and a side view showing an example of the electric heating device of the present invention.
【図５】本発明の通電加熱装置の一例を示す平面図およ
び側面図である。5A and 5B are a plan view and a side view showing an example of the electric heating apparatus of the present invention.
【図６】走行通電加熱装置の一例を示す図および加熱状
況を示す図である。FIG. 6 is a diagram showing an example of a traveling electric heating device and a diagram showing a heating situation.
【図７】本発明装置と走行通電加熱装置を組み合わせて
加熱した場合の加熱状況を示す図である。FIG. 7 is a diagram showing a heating situation in the case where the device of the present invention and a traveling electric heating device are combined and heated.
【図８】従来の通電加熱装置の一例を示す側面図および
加熱状況を示す図である。FIG. 8 is a side view showing an example of a conventional electric heating device and a diagram showing a heating state.
【図９】特開平2-111817号公報に開示された加熱装置の
側面図である。FIG. 9 is a side view of a heating device disclosed in Japanese Patent Laid-Open No. 2-111817.
【図１０】実施例に用いた本発明装置と走行通電加熱装
置を示す側面図である。FIG. 10 is a side view showing the device of the present invention and a running electric heating device used in Examples.
【図１１】本発明装置と比較装置による通電加熱時の測
温結果を示す図である。FIG. 11 is a diagram showing a temperature measurement result at the time of electric heating by the device of the present invention and the comparative device.
１：被加熱材 ２：電極 ３：導電部材 ４：給電ロール ５：押さえロール ６：短絡部材 ７：電源 ８：温度計 1: Heated material 2: Electrode 3: Conductive member 4: Power supply roll 5: Pressing roll 6: Short-circuit member 7: Power supply 8: Thermometer
Claims (2)
加熱材を加熱する直接通電加熱装置において、被加熱材
の両幅端部に接触可能にかつ被加熱材の幅方向に対向さ
せた複数個の電極を備え、各電極が個々に通電可能であ
ると共に、前記電極を被加熱材幅方向および／または上
下方向に移動可能としたことを特徴とする直接通電加熱
装置。1. A direct current heating device for heating a material to be heated by utilizing Joule heat generated by direct current supply, wherein a plurality of the widthwise ends of the material to be heated are contactable with both width ends of the material to be heated. A direct electric heating device comprising: a plurality of electrodes, each of which can be individually energized, and the electrodes being movable in the width direction and / or the vertical direction of the material to be heated.
加熱材を加熱する直接通電加熱方法において、被加熱材
の幅方向に対向させた複数個の電極を、被加熱材の長手
方向端部の両幅端部に接触させ、個々の電極に通電して
被加熱材の長手方向端部を通電加熱すると共に、被加熱
材を走行方向に所定の距離を隔てて設置された複数の電
極間で走行通電加熱して、全長に亘って被加熱材を所定
の温度に加熱することを特徴とする直接通電加熱方法。2. A direct current heating method for heating a material to be heated by utilizing Joule heat generated by direct current supply, wherein a plurality of electrodes opposed to each other in the width direction of the material to be heated are provided at a longitudinal end portion of the material to be heated. Of the electrodes to be heated by energizing the individual electrodes by energizing the individual electrodes to heat the longitudinal ends of the material to be heated. A direct electric heating method, characterized in that the material to be heated is heated to a predetermined temperature over the entire length by traveling electric heating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6590995A JPH08264260A (en) | 1995-03-24 | 1995-03-24 | Direct electrification heating device and direct electrification heating method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6590995A JPH08264260A (en) | 1995-03-24 | 1995-03-24 | Direct electrification heating device and direct electrification heating method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08264260A true JPH08264260A (en) | 1996-10-11 |
Family
ID=13300569
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6590995A Pending JPH08264260A (en) | 1995-03-24 | 1995-03-24 | Direct electrification heating device and direct electrification heating method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08264260A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002248525A (en) * | 2001-02-22 | 2002-09-03 | Sumitomo Metal Ind Ltd | Method for hot pressing metal plate and apparatus therefor |
| JP2009172392A (en) * | 2000-12-22 | 2009-08-06 | Philip Moris Usa Inc | Aerosol generator with a plurality of heating zones, and its use |
-
1995
- 1995-03-24 JP JP6590995A patent/JPH08264260A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009172392A (en) * | 2000-12-22 | 2009-08-06 | Philip Moris Usa Inc | Aerosol generator with a plurality of heating zones, and its use |
| JP2002248525A (en) * | 2001-02-22 | 2002-09-03 | Sumitomo Metal Ind Ltd | Method for hot pressing metal plate and apparatus therefor |
| JP4604364B2 (en) * | 2001-02-22 | 2011-01-05 | 住友金属工業株式会社 | Method and apparatus for hot pressing metal plate |
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