JPH0819476B2 - Atmosphere heat treatment furnace - Google Patents
Atmosphere heat treatment furnaceInfo
- Publication number
- JPH0819476B2 JPH0819476B2 JP62206744A JP20674487A JPH0819476B2 JP H0819476 B2 JPH0819476 B2 JP H0819476B2 JP 62206744 A JP62206744 A JP 62206744A JP 20674487 A JP20674487 A JP 20674487A JP H0819476 B2 JPH0819476 B2 JP H0819476B2
- Authority
- JP
- Japan
- Prior art keywords
- strip
- furnace
- shaped material
- tension
- heat treatment
- 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.)
- Expired - Lifetime
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- Heat Treatment Of Strip Materials And Filament Materials (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） この発明は鉄あるいは非鉄金属の帯状材を張力を加え
た状態で炉内に挿通させ、炉内の雰囲気中で例えば焼鈍
等の熱処理を施すようにした雰囲気熱処理炉に関する。DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention inserts a strip of ferrous or non-ferrous metal into a furnace with tension applied, and performs heat treatment such as annealing in an atmosphere inside the furnace. The present invention relates to an atmosphere heat treatment furnace.
（従来の技術） この種の炉において炉内における上記帯状材の張力
が、小さ過ぎると炉内で帯状材が垂れ下がってこすれに
よる表面疵を生じたり、バーナーの炎が過剰に当ったり
する。(Prior Art) In this type of furnace, if the tension of the strip-shaped material in the furnace is too low, the strip-shaped material hangs down in the furnace to cause surface scratches due to rubbing, or the burner flame is excessively hit.
これに対処して、例えば実開昭57−162365号公報で知
られる炉にあっては、炉体の一端に炉内に向けて帯状材
を導入する為の入口を設け、炉体の他端に炉内を通過し
た上記帯状材を炉外に導出する為の出口を備え、炉内の
天井には帯状材の高さを測定する距離測定センサを配置
し、それにより炉の入側と、出側に設けた２組のテンシ
ョンロールを作動させて帯状材の高さの調整をしてい
る。To cope with this, for example, in the furnace known from Japanese Utility Model Publication No. 57-162365, an inlet is provided at one end of the furnace body for introducing the strip-shaped material toward the inside of the furnace body, and the other end of the furnace body is provided. An outlet for leading the strip-shaped material that has passed through the furnace to the outside of the furnace is provided, and a distance measuring sensor for measuring the height of the strip-shaped material is arranged on the ceiling of the furnace, and thereby the inlet side of the furnace, The height of the strip is adjusted by operating two sets of tension rolls on the delivery side.
（発明が解決しようとする問題点） しかし炉の天井において、距離測定センサを配置し、
上記帯状材の高さを検出し、張力を制御する従来の方法
では次の場合対応できない。(Problems to be solved by the invention) However, the distance measuring sensor is arranged on the ceiling of the furnace,
The conventional method of detecting the height of the band-shaped material and controlling the tension cannot handle the following cases.
即ち、雰囲気熱処理炉において、上記炉の入口に雰囲
気シール装置を設けていると、この装置と帯状材との摩
擦が変動してその摩擦による帯状材の張力ロスが変動す
る。そうすると、炉内での帯状材の張力が適正値から外
れてしまう問題点がある。That is, in an atmosphere heat treatment furnace, if an atmosphere sealing device is provided at the entrance of the furnace, the friction between the device and the strip material fluctuates, and the tension loss of the strip material fluctuates due to the friction. Then, there is a problem that the tension of the strip-shaped material in the furnace deviates from an appropriate value.
帯状材の張力が適正値よりも小さいと前記した問題点
が生じる。また張力が適正値よりも大きくなると、高温
の為に変形し易くなっている帯状材が伸びて品質斑が生
じるというような事故が発生する。特に後述するように
帯状材の「厚み」「巾寸法」によって、雰囲気シール装
置との摩擦抵抗が変化すると、上記問題点は益々増大す
る。If the tension of the belt-shaped material is smaller than the appropriate value, the above-mentioned problems occur. Further, if the tension is higher than the appropriate value, an accident occurs in which the band-shaped material, which is easily deformed due to the high temperature, stretches to cause quality unevenness. Especially, as will be described later, if the frictional resistance with the atmosphere sealing device changes depending on the "thickness" and "width" of the strip-shaped material, the above problems become more and more serious.
このような大きな問題点を解決しようとしても、第１
図のように炉の中間に帯状材を受けるローラ13があった
り、帯状材の通過軌跡の下方に噴出ノズルを設けてそこ
から風を吹上げて帯状材の垂下がりを防止している場合
は、前記従来手段のように帯状材の高さを測定しても、
それによっては帯状材の正しい張力を測定することはで
きない。Even if you try to solve such a big problem,
In the case where there is a roller 13 for receiving the strip-shaped material in the middle of the furnace as shown in the figure, or a jet nozzle is provided below the path of passage of the strip-shaped material and wind is blown up from there to prevent drooping of the strip-shaped material. , Even if the height of the strip-shaped material is measured as in the conventional means,
It cannot measure the correct tension of the strip.
まして垂下がり防止手段が上記のように施されている
場合は、張力が過大になっても、帯状材の高さの変化の
割合は極めて小さくなり、誤って帯状材に過大な張力を
与え、帯状材を伸長させる問題点が生じる等、帯状材の
張力を正しく保つことはできない問題点がある。Furthermore, if the drooping prevention means is applied as described above, even if the tension becomes excessive, the rate of change in the height of the strip becomes extremely small, and excessive tension is erroneously applied to the strip. There is a problem that the tension of the belt-shaped material cannot be maintained correctly, such as a problem of stretching the belt-shaped material.
この発明は上記従来の問題点を除き、炉の入口に雰囲
気シール装置が設けられ、その装置と帯状材との摩擦に
よる帯状材の張力ロスが変動しても、炉内での「帯状材
の張力の大きさ」を検出し、接触式の雰囲気シール装置
を通過させる前の帯状材の張力の大きさを制御するよう
することによって、炉内の帯状材の張力を、小さい場合
のみならず大きい場合においても、適正に制御できるよ
うにして、「高温の為に変形し易くなっている帯状材が
伸びて品質斑が生じるというような事故」を防止できる
ようにした雰囲気熱処理炉を提供しようとするものであ
る。Except for the above-mentioned conventional problems, the present invention is provided with an atmosphere sealing device at the entrance of the furnace, and even if the tension loss of the belt-shaped material due to the friction between the device and the belt-shaped material fluctuates, By detecting the "tensity of tension" and controlling the magnitude of tension of the strip before passing through the contact-type atmosphere sealing device, the tension of the strip in the furnace is increased not only when it is small but also when it is large. Even in such a case, an attempt is made to provide an atmosphere heat treatment furnace that can be appropriately controlled to prevent "an accident in which a band-shaped material that is easily deformed due to high temperature stretches to cause quality unevenness". To do.
（問題点を解決する為の手段） 本願発明は、炉体の一端には炉内に向けて帯状材を導
入する為の入口を有し、炉体の他端には炉内を通過した
上記帯状材を炉外に導出する為の出口を有し、しかも上
記入口には接触式の雰囲気シール装置が備えられている
雰囲気熱処理炉において、炉内における上記帯状材の通
過予定軌跡に沿わせて、上記接触式の雰囲気シール装置
を通過した後の帯状材の張力の大きさを検出するように
した張力検出装置を設ける一方、炉外における上記帯状
材の通過予定軌跡に沿わせて、上記接触式の雰囲気シー
ル装置を通過した後の帯状材の張力の検出値に基づい
て、上記接触式の雰囲気シール装置を通過させる前の帯
状材の張力の大きさを制御するようにした張力制御機構
を設けて、接触式の雰囲気シール装置を通過した後の帯
状材の張力が適正になるよう制御するようにしたのであ
る。(Means for Solving Problems) The present invention has an inlet at one end of the furnace body for introducing the strip-shaped material into the furnace, and the other end of the furnace body passing through the furnace. In an atmospheric heat treatment furnace that has an outlet for leading the strip-shaped material out of the furnace, and the inlet is equipped with a contact-type atmosphere sealing device, along the planned passage path of the strip-shaped material inside the furnace. While providing a tension detecting device for detecting the magnitude of the tension of the strip-shaped material after passing through the contact-type atmosphere sealing device, the contact is made along the planned passage path of the strip-shaped material outside the furnace. A tension control mechanism for controlling the magnitude of the tension of the strip-shaped material before passing through the contact-type atmosphere sealing device based on the detected value of the tension of the strip-shaped material after passing through the contact-type atmosphere sealing device. Installed and passed through the contact type atmosphere seal device After that, the tension of the strip-shaped material was controlled to be appropriate.
（作用） 帯状材は入口から炉内に入り、炉内を通過する過程で
熱処理が施され、出口から導出される。炉内において
は、「帯状材の張力の大きさ」を検出する。その検出値
に基づき炉外の張力制御機構によって炉内の帯状材の張
力の大きさが制御される。(Function) The strip-shaped material enters the furnace through the inlet, is subjected to heat treatment in the process of passing through the furnace, and is discharged through the outlet. In the furnace, "amount of tension of the strip material" is detected. Based on the detected value, the tension control mechanism outside the furnace controls the tension of the strip-shaped material inside the furnace.
（実施例） 以下本願の実施例を示す図面について説明する。第１
図において、１は雰囲気熱処理炉を示す。該雰囲気熱処
理炉１において、２は炉体で中空に形成されており、そ
の一端には炉内に向けて帯状材を連続して導入する為の
入口３が、他端には炉内を通過した帯状材を炉外に連続
して導出する為の出口４が夫々設けてある。炉体２の内
部は仕切壁５によって例えば加熱室６と冷却室７とに仕
切られている。加熱室６には帯状材の加熱手段が備えら
れ、また例えば図示外の周知の雰囲気ガス発生装置から
雰囲気ガスが送り込まれるようになっている。一方冷却
室７には帯状材の冷却手段が備えられる。8,9は夫々上
記入口３、出口４に備えた接触式の雰囲気シール装置
で、フエルト式あるいはロール式など種々の方式のもの
がある。13は炉体２内において中間部に設けた帯状材の
支持ロールを示す。(Example) Hereinafter, drawings showing an example of the present application will be described. First
In the figure, 1 indicates an atmosphere heat treatment furnace. In the atmosphere heat treatment furnace 1, a furnace body 2 is formed hollow, and an inlet 3 for continuously introducing a strip-shaped material toward the furnace is provided at one end thereof, and the other end is passed through the furnace. Each of the outlets 4 is provided for continuously leading the strip-shaped material out of the furnace. The inside of the furnace body 2 is partitioned by a partition wall 5 into, for example, a heating chamber 6 and a cooling chamber 7. The heating chamber 6 is provided with a heating means for the band-shaped material, and the atmospheric gas is fed from a known atmospheric gas generator (not shown), for example. On the other hand, the cooling chamber 7 is provided with a belt-shaped material cooling means. Numerals 8 and 9 are contact type atmosphere sealing devices provided in the inlet 3 and the outlet 4, respectively, and various types such as a felt type or a roll type are available. Reference numeral 13 denotes a belt-shaped support roll provided in the middle of the furnace body 2.
次に10は炉体２内において入口３の近くに設けた張力
検出装置で、炉内における帯状材の通過予定軌跡に沿わ
せて設けてある。尚この張力検出装置10は炉内の中間あ
るいは出口４に近い位置などいずれの箇所に設けてもよ
い。11は炉外における上記帯状材の通過予定軌跡に沿わ
せて設けた張力制御機構で、上記張力検出装置による張
力の検出値に基づいて上記帯状材の張力の大きさを制御
するようにしたものであり、例えばブライドルロールが
用いられる。12は炉体２の出口４の外側に設けた周知の
ブライドルロールである。Next, 10 is a tension detecting device provided in the furnace body 2 near the inlet 3, and is provided along the trajectory of the band-shaped material in the furnace. The tension detecting device 10 may be provided at any position such as in the middle of the furnace or at a position near the outlet 4. Reference numeral 11 is a tension control mechanism provided along the trajectory of the band-shaped material passing outside the furnace, which controls the magnitude of the tension of the band-shaped material based on the detected value of the tension by the tension detection device. And, for example, a bridle roll is used. Reference numeral 12 is a well-known bridle roll provided outside the outlet 4 of the furnace body 2.
上記構成のものにあっては、帯状材Ｓは通過予定軌跡
に沿って図示の如く挿通され、図示外の周知の駆動機構
によって矢印方向に移動される。この状態において入口
３から加熱室６に入った帯状材Ｓは、所定の加熱速度で
もって所定の温度まで加熱され、次に冷却室７において
所定の冷却速度で所定の温度まで冷却される。即ち所定
の熱処理が施される。熱処理が施された帯状材Ｓは出口
４から次工程へ向け導出される。In the above-mentioned structure, the band-shaped material S is inserted as shown in the drawing along the trajectory of passage, and is moved in the arrow direction by a well-known drive mechanism (not shown). In this state, the strip S that has entered the heating chamber 6 through the inlet 3 is heated to a predetermined temperature at a predetermined heating rate, and then cooled to a predetermined temperature in the cooling chamber 7 at a predetermined cooling rate. That is, a predetermined heat treatment is performed. The heat-treated strip-shaped material S is led out from the outlet 4 toward the next step.
上記の状態において各場所の帯状材Ｓに加わる張力
は、シール装置8,9やブライドルロール等の各種部材と
の接触によって例えば第１図の下側に付記したようにな
る。この場合例えば入口３のシール装置８と帯状材Ｓと
の摩擦抵抗が増大すると、炉体２内の帯状材Ｓの張力は
矢印Ａで示す如く上昇しようとする。しかしその上昇は
即座に張力検出装置10によって検出され、その検出値の
増大に基づいて、張力制御機構11から帯状材Ｓに与えら
れる張力の大きさが矢印Ｂで示す如く減少される。この
為炉体２内における帯状材Ｓの張力は実質的には上昇せ
ず略一定の大きさに保持される。In the above state, the tension applied to the strip-shaped material S at each place is as shown in the lower part of FIG. 1 by contact with various members such as the sealing devices 8 and 9 and bridle rolls. In this case, for example, when the frictional resistance between the sealing device 8 at the inlet 3 and the strip S increases, the tension of the strip S in the furnace body 2 tends to increase as indicated by arrow A. However, the increase is immediately detected by the tension detecting device 10, and based on the increase in the detected value, the magnitude of the tension applied from the tension control mechanism 11 to the strip S is decreased as shown by the arrow B. Therefore, the tension of the strip-shaped material S in the furnace body 2 does not substantially increase and is maintained at a substantially constant magnitude.
一方上記シール装置８と帯状材Ｓとの摩擦抵抗が減少
した場合には、上記とは対称的な動作によって炉体２内
における帯状材Ｓの張力は略一定の大きさに保持され
る。On the other hand, when the frictional resistance between the sealing device 8 and the band-shaped material S is reduced, the tension of the band-shaped material S in the furnace body 2 is maintained at a substantially constant level by a symmetrical operation.
上記のような張力の制御の結果、炉体２内において
は、張力の過少により帯状材Ｓが垂れ下がって帯状材Ｓ
の表面に接触きずが生じたり、逆に張力の過大により、
高温の為に変形し易くなっている帯状材Ｓが伸びて品質
斑が生じるというような事故の発生は防止され、帯状材
Ｓには適正な張力状態のもとで適正な熱処理が施され
る。As a result of the tension control as described above, in the furnace body 2, the belt-shaped material S hangs down due to the insufficient tension,
The surface of the will have scratches, or on the contrary, excessive tension will cause
It is possible to prevent the occurrence of an accident such that the strip-shaped material S, which is easily deformed due to the high temperature, is stretched to cause quality unevenness, and the strip-shaped material S is appropriately heat-treated under a proper tension state. .
上記のような効果は通常の厚みの帯状材Ｓの場合に発
揮されることは勿論であるが、帯状材Ｓの厚みが薄い場
合に特に顕著である。即ち、上記帯状材Ｓに加えるべき
適正な張力の大きさはその材質は勿論のこと断面積の大
きさに依るところが大きい。従って薄い帯状材の場合に
はそれに応じて張力を小さくする必要がある。The above-mentioned effects are of course exhibited in the case of the belt-shaped material S having a normal thickness, but are particularly remarkable when the thickness of the belt-shaped material S is thin. That is, the magnitude of the appropriate tension to be applied to the band-shaped material S depends largely on the size of the cross-sectional area as well as the material. Therefore, in the case of a thin strip, it is necessary to reduce the tension accordingly.
一方、上記シール装置と帯状材との摩擦抵抗の大きさ
は帯状材の厚みには無関係である。従って、薄い帯状材
の場合には、帯状材に与えられる炉内での張力のうち上
記摩擦抵抗によって帯状材に与えられる部分の割合が大
きい。On the other hand, the magnitude of the frictional resistance between the sealing device and the strip-shaped material is independent of the thickness of the strip-shaped material. Therefore, in the case of a thin strip-shaped material, a large proportion of the tension applied to the strip-shaped material by the frictional resistance is large in the tension applied to the strip-shaped material in the furnace.
この為、上記摩擦抵抗の変動がまともに帯状材Ｓの張
力の変動として現われる可能性がある。しかし上記のよ
うに炉内において帯状材の張力を検出し、それが適正と
なるよう制御することによって、炉内での帯状材の張力
を適正な値とすることができる。Therefore, the fluctuation of the frictional resistance may appear as the fluctuation of the tension of the strip material S. However, as described above, the tension of the strip-shaped material in the furnace can be set to an appropriate value by detecting the tension of the strip-shaped material in the furnace and controlling the tension to be appropriate.
次に第２図は上記雰囲気シール装置８の構造の一例を
示すものである。図において、14は押え棒、15はフエル
トで、押え棒14に矢印方向の付勢力が加えられてフエル
ト15の表面が帯状材Ｓの表面に接触し、炉内外での雰囲
気の遮断をするようになっている。Next, FIG. 2 shows an example of the structure of the atmosphere sealing device 8. In the figure, 14 is a presser bar, and 15 is a felt, and a biasing force in the direction of the arrow is applied to the presser bar 14 so that the surface of the felt 15 comes into contact with the surface of the strip S and shuts off the atmosphere inside and outside the furnace. It has become.
（発明の効果） 以上のように本発明の雰囲気熱処理炉にあっては、帯
状材Ｓを入口３から雰囲気炉内に挿通させ出口４から導
出する過程で、その帯状材Ｓに一定の雰囲気のもとで熱
処理を施し得るは勿論のこと、 上記の場合、雰囲気シール装置８が設けられている入
口３から入り、炉内を移動する帯状材Ｓにおいて、その
「張力の大きさの変化」を検出し、その張力の大きさに
基づいて入口側の張力の大きさを制御するので、次のよ
うな効果もある。(Effects of the Invention) As described above, in the atmospheric heat treatment furnace of the present invention, in the process of inserting the strip-shaped material S from the inlet 3 into the atmosphere furnace and out from the outlet 4, the strip-shaped material S is exposed to a constant atmosphere. Of course, the heat treatment can be performed, but in the above case, the "change in the magnitude of the tension" is caused in the strip-shaped material S that enters through the inlet 3 provided with the atmosphere sealing device 8 and moves in the furnace. Since it is detected and the magnitude of the tension on the inlet side is controlled based on the magnitude of the tension, the following effects are also obtained.
即ち、上記入口３の雰囲気シール装置８と帯状材Ｓと
の摩擦による張力ロスが変動しても、炉内での帯状材の
張力が過大になることを防止して、適正張力の下で、即
ち「高温の為に変形し易くなっている帯状材Ｓが伸びて
品質斑が生じるというような事故」を防止しながら上記
熱処理を可能ならしめる画期的効果がある。That is, even if the tension loss due to the friction between the atmosphere sealing device 8 of the inlet 3 and the strip material S fluctuates, the tension of the strip material in the furnace is prevented from becoming excessive, and under the proper tension, That is, there is an epoch-making effect of enabling the above heat treatment while preventing "an accident in which the band-shaped material S, which is easily deformed due to a high temperature, is stretched to cause quality unevenness".
図面は本願の実施例を示すもので、第１図は雰囲気熱処
理炉の縦断面略示図、第２図は雰囲気シール装置の縦断
面部分図。 ２……炉体、３……入口、４……出口、8,9……雰囲気
シール装置、10……張力検出装置、11……張力制御機
構、Ｓ……帯状材。The drawings show the embodiments of the present application. FIG. 1 is a schematic vertical sectional view of an atmospheric heat treatment furnace, and FIG. 2 is a partial vertical sectional view of an atmospheric sealing device. 2 ... Furnace body, 3 ... Inlet, 4 ... Outlet, 8,9 ... Atmosphere sealing device, 10 ... Tension detecting device, 11 ... Tension control mechanism, S ... Strip material.
Claims (1)
する為の入口を有し、炉体の他端には炉内を通過した上
記帯状材を炉外に導出する為の出口を有し、しかも上記
入口には接触式の雰囲気シール装置が備えられている雰
囲気熱処理炉において、炉内における上記帯状材の通過
予定軌跡に沿わせて、上記接触式の雰囲気シール装置を
通過した後の帯状材の張力の大きさを検出するようにし
た張力検出装置を設ける一方、炉外における上記帯状材
の通過予定軌跡に沿わせて、上記接触式の雰囲気シール
装置を通過した後の帯状材の張力の検出値に基づいて、
上記接触式の雰囲気シール装置を通過させる前の帯状材
の張力の大きさを制御するようにした張力制御機構を設
けて、接触式の雰囲気シール装置を通過した後の帯状材
の張力が適正になるように制御することを特徴とする雰
囲気熱処理炉。1. A furnace body has an inlet at one end for introducing the strip-shaped material into the furnace, and the other end of the furnace body for discharging the strip-shaped material passing through the furnace to the outside of the furnace. In an atmosphere heat treatment furnace having an outlet of, and a contact-type atmosphere seal device provided at the inlet, the contact-type atmosphere seal device is installed along the planned passage path of the strip-shaped material in the furnace. While providing a tension detector that detects the magnitude of tension of the strip-shaped material after passing, after passing through the contact-type atmosphere sealing device along the planned passage path of the strip-shaped material outside the furnace Based on the detected value of the tension of the strip material,
A tension control mechanism for controlling the magnitude of the tension of the strip-shaped material before passing through the contact-type atmosphere sealing device is provided so that the tension of the strip-shaped material after passing through the contact-type atmosphere sealing device is properly adjusted. Atmosphere heat treatment furnace characterized by controlling so that
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62206744A JPH0819476B2 (en) | 1987-08-20 | 1987-08-20 | Atmosphere heat treatment furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62206744A JPH0819476B2 (en) | 1987-08-20 | 1987-08-20 | Atmosphere heat treatment furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6452026A JPS6452026A (en) | 1989-02-28 |
| JPH0819476B2 true JPH0819476B2 (en) | 1996-02-28 |
Family
ID=16528377
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62206744A Expired - Lifetime JPH0819476B2 (en) | 1987-08-20 | 1987-08-20 | Atmosphere heat treatment furnace |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0819476B2 (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57162365U (en) * | 1981-04-07 | 1982-10-13 |
-
1987
- 1987-08-20 JP JP62206744A patent/JPH0819476B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6452026A (en) | 1989-02-28 |
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