JP2838619B2 - Automatic temperature control device for induction heating type vacuum melting furnace - Google Patents
Automatic temperature control device for induction heating type vacuum melting furnaceInfo
- Publication number
- JP2838619B2 JP2838619B2 JP4171492A JP4171492A JP2838619B2 JP 2838619 B2 JP2838619 B2 JP 2838619B2 JP 4171492 A JP4171492 A JP 4171492A JP 4171492 A JP4171492 A JP 4171492A JP 2838619 B2 JP2838619 B2 JP 2838619B2
- Authority
- JP
- Japan
- Prior art keywords
- melting furnace
- induction heating
- heating type
- temperature
- radiation thermometer
- 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 - Fee Related
Links
Landscapes
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
- Crucibles And Fluidized-Bed Furnaces (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、真空室内に傾転自在の
誘導加熱式溶解炉を設けた誘導加熱式真空溶解炉の溶解
温度を自動制御する自動温度制御装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic temperature control apparatus for automatically controlling the melting temperature of an induction heating type vacuum melting furnace provided with a tiltable induction heating type melting furnace in a vacuum chamber.
【０００２】[0002]
【従来の技術】従来、誘導加熱式真空溶解炉は、図１に
示すように、真空室ａ内に加熱コイルｂで囲まれた溶解
炉ｃを支柱ｄに油圧シリンダｅに傾転自在に設けると共
に、傾転する溶解炉ｃからの溶湯を受ける溶湯受ｆの下
方に鋳型ｇを設けて構成されている。該加熱コイルｂに
は電力導入ケーブルｈにより電力が供給され、該溶解炉
ｃ内には真空室ａの移動式の上蓋ｉに設けた原料添加装
置ｊにより原料が供給され、更に該上蓋ｉに設けた合金
添加装置ｋにより合金材料が溶解炉ｃ内に供給される。
ｌは上蓋ｉに設けた覗窓である。2. Description of the Related Art Conventionally, in an induction heating type vacuum melting furnace, as shown in FIG. 1, a melting furnace c surrounded by a heating coil b is provided in a vacuum chamber a on a column d so as to be tiltable to a hydraulic cylinder e. At the same time, a mold g is provided below the molten metal receiver f for receiving the molten metal from the tilting melting furnace c. Electric power is supplied to the heating coil b by an electric power introduction cable h, and a raw material is supplied into the melting furnace c by a raw material adding device j provided in a movable upper lid i of a vacuum chamber a. The alloy material is supplied into the melting furnace c by the provided alloy adding device k.
1 is a viewing window provided on the upper lid i.
【０００３】該溶解炉ｃにより組成の調整された合金を
製造する場合、溶解炉ｃ内に一部の原料を収めておき、
真空室ａ内を図示してない真空ポンプにより真空に排気
する。そして電力ケーブルｈを介して加熱コイルｂに高
周波電力を投入し、溶解炉ｃ内の原料を溶かす。加熱温
度の制御は手動つまみを操作して投入電力を制御するこ
とにより行ない、原料が溶解したら原料添加装置ｊによ
り次の原料を添加し更に必要ならば合金原料添加装置ｋ
により合金原料を添加する。これら原料等が完全に溶解
し充分に攪拌されたことを確認して溶解炉ｃを油圧シリ
ンダｅにより傾転させ、溶湯を溶湯受ｆを介して鋳型ｇ
に鋳込む。[0003] In the case of producing an alloy whose composition is adjusted by the melting furnace c, a part of the raw material is stored in the melting furnace c,
The inside of the vacuum chamber a is evacuated by a vacuum pump (not shown). Then, high-frequency power is supplied to the heating coil b via the power cable h to melt the raw material in the melting furnace c. The heating temperature is controlled by controlling the input power by operating a manual knob. When the raw material is dissolved, the next raw material is added by the raw material adding device j, and if necessary, the alloy raw material adding device k
To add the alloy raw material. After confirming that these raw materials and the like are completely dissolved and sufficiently stirred, the melting furnace c is tilted by the hydraulic cylinder e, and the molten metal is cast through the molten metal receiver f into the mold g.
Cast into
【０００４】[0004]
【発明が解決しようとする課題】上記のように、従来の
誘導加熱式真空溶解炉は、原料の温度が判断できない状
態で加熱されており、そのため添加原料の添加タイミン
グが一定でなく、添加時の湯温も一定でないため、オペ
レーターにより製品の品質にばらつきが出る不都合があ
った。また、加熱中は、覗窓ｌから常時炉内を監視しな
がら手動つまみによる加熱電力制御をしなければならな
いため、常に複数名のオペレーターが作業に従事しなけ
ればならないという問題があった。As described above, the conventional induction heating type vacuum melting furnace is heated in a state where the temperature of the raw material cannot be determined. Since the hot water temperature is not constant, there is a problem that the quality of the product varies depending on the operator. In addition, during heating, the heating power must be controlled by a manual knob while constantly monitoring the inside of the furnace from the viewing window l. Thus, there has been a problem that a plurality of operators must be engaged in the work at all times.
【０００５】本発明は、自動的に温度制御されて溶解し
添加タイミングの狂いが少なく品質のばらつきの少ない
製品を製造できる誘導加熱式真空溶解炉を提供すること
を目的とするものである。SUMMARY OF THE INVENTION An object of the present invention is to provide an induction heating type vacuum melting furnace capable of producing a product which is automatically controlled in temperature, melted and has little irregularity in addition timing and small quality variation.
【０００６】[0006]
【課題を解決するための手段】本発明では、真空室内に
傾転自在の誘導加熱式溶解炉と鋳型を設け、該真空室の
上蓋に原料添加装置を設けた誘導加熱式真空溶解炉に於
いて、該上蓋に開閉自在の仕切弁を介して該誘導加熱式
溶解炉内の溶湯温度を測定する放射温度計を設け、該誘
導加熱式溶解炉へ電力を供給する加熱電源に、該放射温
度計からの出力信号に応じて該誘導加熱式溶解炉への電
力を制御するプログラム温度調節計を設けることによ
り、上記の目的を達成するようにした。According to the present invention, there is provided an induction heating type vacuum melting furnace in which a tiltable induction heating type melting furnace and a mold are provided in a vacuum chamber, and a raw material adding device is provided in an upper lid of the vacuum chamber. A radiation thermometer for measuring the temperature of the molten metal in the induction heating type melting furnace via a gate valve that can be opened and closed on the upper lid, and a heating power supply for supplying electric power to the induction heating type melting furnace; The above object is achieved by providing a program temperature controller for controlling the power to the induction heating type melting furnace in accordance with the output signal from the meter.
【０００７】上記の手段に於いて、更に上記プログラム
温度調節計に上記放射温度計からの出力信号を変換する
放射温度計変換器を接続し、上記真空室の上蓋に、開閉
自在の仕切弁を介して誘導加熱式溶解炉の溶湯に接触し
て測温する昇降自在の熱電対温度計を設け、該熱電対温
度計の出力信号で該放射温度計変換器の出力を較正すべ
く該熱電対温度計を該放射温度計変換器に接続すれば、
正確な自動温度制御を行なえて有利である。In the above means, a radiation thermometer converter for converting an output signal from the radiation thermometer is connected to the program temperature controller, and a gate valve which can be opened and closed is provided on the upper lid of the vacuum chamber. A thermocouple that can be moved up and down to measure the temperature by contacting the molten metal of the induction heating melting furnace through the thermocouple, and to calibrate the output of the radiation thermometer converter with the output signal of the thermocouple thermometer. If a thermometer is connected to the radiation thermometer converter,
It is advantageous to perform accurate automatic temperature control.
【０００８】[0008]
【作用】誘導加熱式溶解炉内に原料の一部を収めてお
き、真空室内を真空に排気したのち該溶解炉の加熱コイ
ルに加熱電源から電力を投入する。該加熱電源はプログ
ラム温度調節計に予め設定したプログラムに従って例え
ば原料が溶落するまでの間は３段階に溶解炉の加熱コイ
ルへの出力電力を制御し、自動的に昇温、温度保持を行
ない、原料が溶け落ちて熱放射率の安定した溶湯面が生
成すると放射温度計による正確な測温のデータがプログ
ラム温度調節計に導入され、正確な温度に従って自動的
に或いはアラーム等の告知による手動で原料添加装置を
操作することができるので、該溶解炉内へ残りの原料や
これに合金原料を添加するタイミングの狂いが少なくな
る。A part of the raw material is stored in an induction heating type melting furnace, and after evacuating the vacuum chamber to a vacuum, electric power is supplied to a heating coil of the melting furnace from a heating power supply. The heating power source controls the output power to the heating coil of the melting furnace in three stages according to the program preset in the program temperature controller, for example, until the raw material melts down, and automatically raises the temperature and maintains the temperature. When the raw material melts down and a molten metal surface with stable thermal emissivity is generated, the accurate temperature measurement data by the radiation thermometer is introduced into the program temperature controller, and it is automatically operated according to the accurate temperature or manually by notification of alarm etc. In this case, the raw material adding apparatus can be operated at a lower temperature.
【０００９】[0009]
【実施例】本発明の実施例を図面に基づき説明すると、
図２及び図３に於いて符号１は誘導加熱式真空溶解炉の
真空室を示し、該真空室１内に設けた支柱２に油圧シリ
ンダ３で傾転自在に誘導加熱式溶解炉４が軸支される。
５は該誘導加熱式溶解炉４の加熱コイル６に給電する電
力ケーブル、７は溶湯受で、該真空室１内を図示してな
い真空ポンプで真空に排気し、加熱コイル６に例えば３
段階に出力を変更できる加熱電源８から高周波電力を通
電すると、該溶解炉４内に予め用意された鉄や鉄系合
金、ニッケル、ニッケル合金等の原料が溶解される。９
は鋳型である。該真空室１の上方は移動自在の上蓋１ａ
で構成され、該上蓋１ａには２基の原料添加装置１０即
ち主原料添加装置１０ａ及び合金原料添加装置１０ｂが
設けられ、更に放射温度計１１と熱電対温度計１２が設
けられる。該主原料添加装置１０ａからは希土類金属や
鉄、Ｎｉ等を該溶解炉４内へ添加し、合金原料添加装置
１０ｂからはＣｏやＡｌ、Ｃｕを添加する。該熱電対温
度計１２として例えば消耗式熱電対温度計が使用され、
測温のときには油圧シリンダ等により該上蓋１ａに設け
た仕切弁１３を介して溶解炉４の原料に熱電対が接する
まで降下する。また、該上蓋１ａに仕切弁１４を介して
真空室１内に連なるサブルーム１５を設け、放射温度計
１１を該サブルーム１５を介して溶解炉４の湯面に向け
て設けるようにした。該サブルーム１５内は不活性ガス
雰囲気或いは真空に維持されるようにし、その内部には
粉塵保護用のドーナツ形のスリット１６を複数個設け、
各スリット１６の中央の透孔を介して湯面からの波長が
放射温度計１１に入射するようにした。１７は石英ガラ
スが嵌められた覗窓である。BRIEF DESCRIPTION OF THE DRAWINGS FIG.
2 and 3, reference numeral 1 denotes a vacuum chamber of an induction heating type vacuum melting furnace. An induction heating type melting furnace 4 is pivotally movable by a hydraulic cylinder 3 on a column 2 provided in the vacuum chamber 1. Supported.
Reference numeral 5 denotes a power cable for supplying power to a heating coil 6 of the induction heating type melting furnace 4. Reference numeral 7 denotes a molten metal receiver, which evacuates the vacuum chamber 1 to a vacuum by a vacuum pump (not shown).
When high-frequency power is supplied from the heating power supply 8 whose output can be changed in stages, raw materials such as iron, iron-based alloy, nickel, and nickel alloy prepared in the melting furnace 4 are melted. 9
Is a mold. Above the vacuum chamber 1 is a movable upper lid 1a.
The upper lid 1a is provided with two raw material adding devices 10, that is, a main raw material adding device 10a and an alloy raw material adding device 10b, and further provided with a radiation thermometer 11 and a thermocouple thermometer 12. Rare earth metals, iron, Ni, and the like are added into the melting furnace 4 from the main raw material adding device 10a, and Co, Al, and Cu are added from the alloy raw material adding device 10b. For example, a consumable thermocouple thermometer is used as the thermocouple thermometer 12,
At the time of temperature measurement, the temperature is lowered by a hydraulic cylinder or the like until the thermocouple comes into contact with the raw material of the melting furnace 4 through the gate valve 13 provided on the upper lid 1a. Further, a sub-room 15 connected to the inside of the vacuum chamber 1 is provided on the upper lid 1a via a gate valve 14, and the radiation thermometer 11 is provided toward the molten metal surface of the melting furnace 4 via the sub-room 15. The inside of the sub-room 15 is maintained in an inert gas atmosphere or a vacuum, and a plurality of donut-shaped slits 16 for dust protection are provided therein.
The wavelength from the molten metal surface was made to enter the radiation thermometer 11 through the central hole of each slit 16. Reference numeral 17 denotes a viewing window fitted with quartz glass.
【００１０】該溶解炉４の温度はその加熱コイル６へ加
熱電源８から供給する電力を変化させることにより制御
され、その電力を変化させるために該加熱電源８にプロ
グラム温度調節計１８を接続し、該プログラム温度調節
計１８に放射温度計１１からの出力信号が放射温度計変
換器１９を介して変換されて入力するように接続した。
該プログラム温度調節計１８は、例えば、ＰＩＤ制御で
き、プログラム１パターン当り９９ステップまで設定可
能で、出力信号の上限出力を制限し、湯温の上昇を制限
する出力リミッタ機能を持ち、更に設定温度に対する或
る一定以上の温度偏差が発生したとき警報を発するアラ
ーム機能を有するものが使用される。該放射温度計変換
器１９には、熱電対温度計１２からの出力が溶湯温度記
録計２０及び較正用温度変換器２１を介して導入される
ようにし、放射温度計１１からの出力を熱電対温度計１
２からの出力で較正できるようにした。２２は熱電対温
度計１２での測温の際に、オペレーターが適温かどうか
を判断するための温度指示計、２３は放射温度計用の温
度記録計である。The temperature of the melting furnace 4 is controlled by changing the power supplied from the heating power supply 8 to the heating coil 6, and a program temperature controller 18 is connected to the heating power supply 8 to change the power. An output signal from the radiation thermometer 11 was connected to the program temperature controller 18 via a radiation thermometer converter 19 so as to be input.
The program temperature controller 18 can perform, for example, PID control, can set up to 99 steps per program, has an output limiter function for limiting the upper limit output of an output signal, and limiting an increase in hot water temperature. A device having an alarm function for issuing an alarm when a temperature deviation of a certain value or more occurs. The output from the thermocouple thermometer 12 is introduced into the radiation thermometer converter 19 through the molten metal temperature recorder 20 and the calibration temperature converter 21, and the output from the radiation thermometer 11 is converted into a thermocouple. Thermometer 1
Calibration was enabled with the output from 2. Reference numeral 22 denotes a temperature indicator for an operator to determine whether the temperature is appropriate when measuring the temperature with the thermocouple thermometer 12, and reference numeral 23 denotes a temperature recorder for a radiation thermometer.
【００１１】その作動を説明すると、溶解炉４内に原料
を収めておき、真空室１内を真空に排気したのち、まず
加熱電源８から例えば原料の種類に応じてｅ1の出力を
所定の時間だけ加熱コイル６に供給する。この供給時の
出力の大きさと時間は、溶解炉４内の原料が溶け落ちる
ように設定され、所定の時間が経過すると、プログラム
温度調節計１８からの指示により自動的に加熱電源８か
らの出力がｅ2に切り換えられる。該プログラム温度調
節計１８には温度と時間とがプログラムされており、そ
の温度に相当する信号出力が該プログラム温度調節計１
８から加熱電源８へ伝達されると、加熱電源８からの出
力が制御され溶解炉４内の溶湯の温度が可及的に制御さ
れる。そして実際の溶解炉４内の温度が設定の温度に合
致しているかどうかを確認するために、仕切弁１４が開
かれ、溶湯から放射温度計１１に入射する波長により温
度を測定し、そのデータが放射温度計変換器１９を介し
てプログラム温度調節計１８に導入され、実際の測定温
度と比較する。もし、測定温度がプログラム温度調節計
１８に設定した温度よりも低いならば、該調節計１８は
自動的に所定の温度になるように加熱電源６への信号を
変更し、放射温度計１１からのフィードバック信号に合
致するように制御する。所定の温度で所定の時間経過す
ると、該プログラム温度調節計１８はアラームを発し、
残りの原料が手動或いは自動的に溶解炉４に投入され、
更に該調節計１８のプログラムに基づき加熱コイル６へ
の電力が制御され、溶湯が所定の温度で所定の時間経過
するとアラームが発しられ、合金原料が溶湯に添加され
る。そして所定の温度で所定の時間経過後、溶解炉４が
油圧シリンダ３で傾転され、鋳型９に注湯される。[0011] To explain its operation, previously met with raw material melting furnace 4, after evacuated to the vacuum chamber 1, from the heating power source 8, for example the raw material is first type given the output of e 1 in accordance with the It is supplied to the heating coil 6 only for a time. The magnitude and time of the output during the supply are set so that the raw material in the melting furnace 4 melts down. After a predetermined time has elapsed, the output from the heating power source 8 is automatically output according to an instruction from the program temperature controller 18. There is switched to e 2. The programmed temperature controller 18 is programmed with temperature and time, and a signal output corresponding to the temperature is output from the programmed temperature controller 1.
When transmitted from the heating power supply 8 to the heating power supply 8, the output from the heating power supply 8 is controlled, and the temperature of the molten metal in the melting furnace 4 is controlled as much as possible. Then, in order to confirm whether or not the actual temperature in the melting furnace 4 matches the set temperature, the gate valve 14 is opened, and the temperature is measured based on the wavelength incident on the radiation thermometer 11 from the molten metal. Is introduced into the programmed temperature controller 18 via the radiation thermometer converter 19 and compared with the actual measured temperature. If the measured temperature is lower than the temperature set in the program temperature controller 18, the controller 18 automatically changes the signal to the heating power supply 6 so as to reach the predetermined temperature, Is controlled so as to match the feedback signal. After a predetermined time at a predetermined temperature, the program temperature controller 18 issues an alarm,
The remaining raw materials are manually or automatically charged into the melting furnace 4,
Further, the power to the heating coil 6 is controlled based on the program of the controller 18, and when a predetermined time has passed at a predetermined temperature of the molten metal, an alarm is issued and the alloy raw material is added to the molten metal. After a lapse of a predetermined time at a predetermined temperature, the melting furnace 4 is tilted by the hydraulic cylinder 3 and poured into the mold 9.
【００１２】溶解炉４内で原料が溶落した後は、熱電対
温度計１２を溶湯に接触させて測温することも可能であ
るので、放射温度計１１による測定温度が不安定な場合
や真の温度から掛け離れている場合には、熱電対温度計
１２を溶湯に接触させ、そのデータを温度記録計２３及
び較正用温度変換器２１を介して放射温度計変換器１９
に導入して温度較正を行なえ、正確な温度制御が可能に
なる。溶解炉４内の設定温度を予め設定された時間だけ
保持したのち、原料添加装置１０から原料、合金を添加
し、所定組成の合金に成分調整される。尚、溶解炉４内
での原料の溶落の判断は、放射温度計１１で測定された
温度と、溶解材料のコンダクタンスの両方が満足された
ときとした。After the raw material has melted down in the melting furnace 4, the thermocouple thermometer 12 can be brought into contact with the molten metal to measure the temperature. Therefore, when the temperature measured by the radiation thermometer 11 is unstable, If the temperature is far from the true temperature, the thermocouple thermometer 12 is brought into contact with the molten metal, and the data is transmitted via the temperature recorder 23 and the calibration temperature converter 21 to the radiation thermometer converter 19.
And temperature calibration can be performed, thereby enabling accurate temperature control. After maintaining the set temperature in the melting furnace 4 for a preset time, a raw material and an alloy are added from the raw material adding device 10 and the components are adjusted to an alloy having a predetermined composition. The determination of melting of the raw material in the melting furnace 4 was made when both the temperature measured by the radiation thermometer 11 and the conductance of the molten material were satisfied.
【００１３】放射温度計１１を取り付けたサブルーム１
５は、仕切弁１４を開くために真空室１と同圧で不活性
ガスの雰囲気に調整され、該サブルーム１５内にはスリ
ット１６が設けられているので、溶解炉４からの蒸発物
が放射温度計１１の測定面に付着することが防止され
る。該放射温度計１１としては単色式のものだけでなく
２色式のものを用いてもよい。The sub room 1 to which the radiation thermometer 11 is attached
5 is adjusted to an inert gas atmosphere at the same pressure as the vacuum chamber 1 in order to open the gate valve 14, and a slit 16 is provided in the sub-room 15, so that the evaporant from the melting furnace 4 is radiated. Adhering to the measurement surface of the thermometer 11 is prevented. As the radiation thermometer 11, not only a monochromatic type but also a two-color type may be used.
【００１４】[0014]
【発明の効果】以上のように、本発明では誘導加熱式真
空溶解炉の真空室の上蓋に開閉自在の仕切弁を介して放
射温度計を設け、該溶解炉への加熱電源に、該放射温度
計からの出力信号に応じて該溶解炉への電力を制御する
プログラム温度調節計を設けたので、溶解炉内の原料が
溶落するまで設定したプログラムに基づき自動的に加熱
電源の出力を制御して炉内の温度を制御し、その溶落後
には放射温度計からの信号により正確に温度制御を行な
えるので、所定の湯温のときに原料を添加できて添加タ
イミングを一定にでき、品質一定の製品を製造できると
共に炉内を監視して温度制御する必要もないので１名の
オペレーターで作業を実行でき経済的である等の効果が
ある。As described above, according to the present invention, the radiation thermometer is provided on the upper lid of the vacuum chamber of the induction heating type vacuum melting furnace via the gate valve which can be opened and closed, and the heating power supply to the melting furnace is provided with the radiation thermometer. Since a program temperature controller is provided to control the power to the melting furnace according to the output signal from the thermometer, the output of the heating power source is automatically set based on the set program until the raw material in the melting furnace melts down. The temperature in the furnace is controlled by controlling the temperature, and after the meltdown, the temperature can be accurately controlled by the signal from the radiation thermometer, so that the raw material can be added at a predetermined hot water temperature and the addition timing can be kept constant. In addition, since it is possible to manufacture a product of constant quality and there is no need to monitor the inside of the furnace and control the temperature, the operation can be performed by one operator, which is economical.
【図１】 従来例の截断側面図FIG. 1 is a cutaway side view of a conventional example.
【図２】 本発明の実施例の截断側面図FIG. 2 is a cutaway side view of an embodiment of the present invention.
【図３】 本発明の要部の説明線図FIG. 3 is an explanatory diagram of a main part of the present invention.
１ 真空室 １ａ 上蓋 ３
油圧シリンダ ４ 誘導加熱式溶解炉 ６ 加熱コイル ８
加熱電源 ９ 鋳型 １０ 原料添加装置 １１
放射温度計 １２ 熱電対温度計 １３、１
４ 仕切弁 １８ プログラム温度調節計 １９ 放射温度計変
換器1 vacuum chamber 1a top lid 3
Hydraulic cylinder 4 Induction heating type melting furnace 6 Heating coil 8
Heating power supply 9 Mold 10 Raw material addition device 11
Radiation thermometer 12 Thermocouple thermometer 13, 1
4 Gate valve 18 Program temperature controller 19 Radiation thermometer converter
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.6，ＤＢ名) B22D 18/08──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. 6 , DB name) B22D 18/08
Claims (2)
と鋳型を設け、該真空室の上蓋に原料添加装置を設けた
誘導加熱式真空溶解炉に於いて、該上蓋に開閉自在の仕
切弁を介して該誘導加熱式溶解炉内の溶湯温度を測定す
る放射温度計を設け、該誘導加熱式溶解炉へ電力を供給
する加熱電源に、該放射温度計からの出力信号に応じて
該誘導加熱式溶解炉への電力を制御するプログラム温度
調節計を設けたことを特徴とする誘導加熱式真空溶解炉
の自動温度制御装置。1. An induction heating type vacuum melting furnace in which a tiltable induction heating type melting furnace and a mold are provided in a vacuum chamber, and a raw material addition device is provided in an upper lid of the vacuum chamber, wherein the upper lid is openable and closable. A radiation thermometer for measuring the temperature of the molten metal in the induction heating type melting furnace through a gate valve is provided, and a heating power supply for supplying power to the induction heating type melting furnace is provided in accordance with an output signal from the radiation thermometer. An automatic temperature control device for an induction heating type vacuum melting furnace, comprising a program temperature controller for controlling electric power to the induction heating type melting furnace.
度計からの出力信号を変換する放射温度計変換器を接続
し、上記真空室の上蓋に、開閉自在の仕切弁を介して誘
導加熱式溶解炉の溶湯に接触して測温する昇降自在の熱
電対温度計を設け、該熱電対温度計の出力信号で該放射
温度計変換器の出力を較正すべく該熱電対温度計を該放
射温度計変換器に接続したことを特徴とする請求項１に
記載の誘導加熱式真空溶解炉の自動温度制御装置。2. A radiation thermometer converter for converting an output signal from the radiation thermometer is connected to the programmed temperature controller, and an induction heating type melting is provided to an upper lid of the vacuum chamber via a gate valve which can be freely opened and closed. A thermocouple thermometer capable of elevating and lowering the temperature in contact with the molten metal of the furnace is provided, and the thermocouple thermometer is used to calibrate the output of the radiation thermometer converter with the output signal of the thermocouple thermometer. The automatic temperature control device for an induction heating type vacuum melting furnace according to claim 1, wherein the automatic temperature control device is connected to a meter converter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4171492A JP2838619B2 (en) | 1992-02-27 | 1992-02-27 | Automatic temperature control device for induction heating type vacuum melting furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4171492A JP2838619B2 (en) | 1992-02-27 | 1992-02-27 | Automatic temperature control device for induction heating type vacuum melting furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05237629A JPH05237629A (en) | 1993-09-17 |
| JP2838619B2 true JP2838619B2 (en) | 1998-12-16 |
Family
ID=12616093
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4171492A Expired - Fee Related JP2838619B2 (en) | 1992-02-27 | 1992-02-27 | Automatic temperature control device for induction heating type vacuum melting furnace |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2838619B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010071666A (en) * | 2008-09-16 | 2010-04-02 | Sinfonia Technology Co Ltd | Airtight melting facility |
| CN105987600B (en) * | 2015-01-29 | 2019-09-10 | 边仁杰 | The convex holding furnace in bottom |
| CN114474647B (en) * | 2022-02-10 | 2024-02-02 | 芜湖市旭辉电工新材料有限责任公司 | Polymer PTC smelting system for temperature control heat tracing cable |
-
1992
- 1992-02-27 JP JP4171492A patent/JP2838619B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05237629A (en) | 1993-09-17 |
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