JP2758228B2 - High-speed heating device - Google Patents
High-speed heating deviceInfo
- Publication number
- JP2758228B2 JP2758228B2 JP22748089A JP22748089A JP2758228B2 JP 2758228 B2 JP2758228 B2 JP 2758228B2 JP 22748089 A JP22748089 A JP 22748089A JP 22748089 A JP22748089 A JP 22748089A JP 2758228 B2 JP2758228 B2 JP 2758228B2
- Authority
- JP
- Japan
- Prior art keywords
- heating furnace
- heating
- heated
- furnace
- container
- 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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Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、被加熱物を急速に加熱するため使用する電
気炉、特に精密な温度のシーケンス制御を必要とする用
途、ゾーンメルテイング用等に適した高速加熱装置に関
する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an electric furnace used for rapidly heating an object to be heated, particularly an application requiring precise temperature sequence control, zone melting, and the like. High-speed heating device suitable for
現在、粉末冶金、精密鋳造、型鍛造、ゾーンメルテイ
ング等の技術分野に於いて、精密な温度制御と高速加熱
が可能な加熱装置が要請されている。At present, in technical fields such as powder metallurgy, precision casting, die forging, and zone melting, a heating device capable of precise temperature control and high-speed heating is demanded.
而して、この種の加熱のために各種各様の加熱炉が提
案されている。然しながら、従来公知の加熱炉は、炉室
の内容積が一定であり、被加熱物に合わせて容積を調節
できず、そのめ不経済であるばかりではなく、被加熱物
の温度を正確に制御しつつ急速加熱、冷却を行うことが
できないと言う問題があった。Various types of heating furnaces have been proposed for this type of heating. However, conventionally known heating furnaces have a constant furnace chamber volume, cannot adjust the volume according to the object to be heated, which is not only uneconomical, but also accurately controls the temperature of the object to be heated. However, there is a problem that rapid heating and cooling cannot be performed while heating.
本発明は叙上の問題を解決するためになされたもので
あり、その目的とするところは、従来よりも精密に制御
された温度曲線に従って、被加熱物を急速に加熱し得る
装置を提供することにある。The present invention has been made in order to solve the above-mentioned problems, and an object of the present invention is to provide an apparatus capable of rapidly heating an object to be heated according to a temperature curve more precisely controlled than before. It is in.
又、本発明は炉室容積を被加熱物の性質、量及び加熱
の目的に合わせて調節できる加熱装置を提供することに
ある。Another object of the present invention is to provide a heating apparatus capable of adjusting the volume of the furnace chamber according to the nature and amount of the object to be heated and the purpose of heating.
上記の目的は、容器のなかに、導電性物質から成り両
端に筒状の開口部を有する炉室を具えた加熱炉を設け、
その内部に被加物体を挿入すると共に加熱炉の両端部に
パルス電流を供給し、かつ、そのパルス電流のパルス形
状、即ち、パルス幅、休止幅及び／又は波高値を制御す
ることにより加熱温度を制御するよう構成した高速加熱
装置により達成される。The above object is to provide a heating furnace having a furnace chamber made of a conductive substance and having cylindrical openings at both ends in the container,
The heating temperature is controlled by inserting an object to be inserted therein and supplying a pulse current to both ends of the heating furnace, and controlling the pulse shape of the pulse current, that is, the pulse width, pause width and / or peak value. Is achieved by a high-speed heating device configured to control
第一の実施例に於いては、加熱炉の一対の開口からそ
れぞれ通電用電極が挿入され、その対をなす通電用電極
と加熱炉内壁とにより内容積可変の炉室が画定され、そ
の炉室内に被加熱物を装填され、そして上記通電用電極
を介して加熱炉にパルス電流が供給される。In the first embodiment, a current-carrying electrode is inserted from each of a pair of openings of the heating furnace, and a pair of current-carrying electrodes and the inner wall of the heating furnace define a furnace chamber having a variable internal volume. An object to be heated is loaded in the room, and a pulse current is supplied to the heating furnace via the electrode for current supply.
この場合、被加熱物を炉室に直接に充填し、電極によ
り加圧、圧縮しつつ通電することもあり、又、炉室内に
設けられた坩堝、鋳型、成形型等の内部で加熱し、軟化
若しくは溶融せしめて、鋳造又は鋳造することもある。In this case, the object to be heated is directly charged into the furnace chamber, and the electrode is pressurized, and the electric current may be applied while being compressed.Also, the crucible provided in the furnace chamber, a mold, a mold, and the like may be heated, It may be softened or melted and then cast or cast.
又本発明装置は、各種物質の熱処理や耐熱試験その他
の目的に広く利用し得るものである。The apparatus of the present invention can be widely used for heat treatment of various substances, heat resistance tests, and other purposes.
而して、何れの場合でも、炉室の容積は被加熱物の性
質、量及び加熱の目的に合わせて調節されるので、常に
経済的で最適の加熱処理が可能となるものである。In any case, the volume of the furnace chamber is adjusted in accordance with the nature and amount of the object to be heated and the purpose of heating, so that economical and optimal heating can always be performed.
第二の実施例に置いては、被加熱物は耐熱性の細長い
容器、例えば耐熱ガラス製の筒内に圧縮充填され、加熱
炉内に挿入される。ガラス製の筒の長さに比べると、加
熱炉は極めて短く、この為、被加熱物は一時には部分的
にしか加熱されない。In the second embodiment, the object to be heated is compression-filled in a heat-resistant elongated container, for example, a tube made of heat-resistant glass, and inserted into a heating furnace. The heating furnace is extremely short in comparison with the length of the glass tube, so that the object to be heated is only partially heated at one time.
そして、ガラス製の容器は予め定められた速度で加熱
炉内を通過せしめられ、これにより被加熱物のゾーンメ
ルテイングが行われる。Then, the glass container is allowed to pass through the heating furnace at a predetermined speed, whereby zone melting of the object to be heated is performed.
上記何れの実施例に於いても、炉内温度及び被加熱物
の温度が計測され、加熱電流パルスのパルス幅が制御さ
れ、これにより被加熱物の温度が精密に制御される。In any of the above embodiments, the furnace temperature and the temperature of the object to be heated are measured, and the pulse width of the heating current pulse is controlled, whereby the temperature of the object to be heated is precisely controlled.
上記の如き装置により、被加熱物は急速に、又場合に
よっては局部的に加熱され、かつその温度が所望のプロ
グラムに従って正確に制御されるようになる。With such a device, the object to be heated is heated quickly and possibly locally, and its temperature is precisely controlled according to the desired program.
又、本発明装置はコンパクトであり、被加熱部分の温
度制御を確実に行えるので、本発明によるときは、小型
精密部品の製造や素材の精錬、熱処理等を確実にかつ経
済的に行うことができる。In addition, since the apparatus of the present invention is compact and can reliably control the temperature of the portion to be heated, according to the present invention, the production of small precision parts, refining of materials, heat treatment, etc. can be performed reliably and economically. it can.
以下、図面を参照しつゝ本発明の構成を具体的に説明
する。Hereinafter, the configuration of the present invention will be specifically described with reference to the drawings.
第１図は本発明にかゝる高速加熱装置の一実施例を示
す正面略図、第２図は第１図に示した装置の主要部の構
造を示す断面図、第３図は電源回路の一例を示す説明
図、第４図は第二の実施例の主要部の構造を示す断面図
である。FIG. 1 is a schematic front view showing an embodiment of a high-speed heating apparatus according to the present invention, FIG. 2 is a sectional view showing the structure of a main part of the apparatus shown in FIG. 1, and FIG. FIG. 4 is an explanatory view showing one example, and FIG. 4 is a sectional view showing the structure of a main part of the second embodiment.
而して、第１図中、１はベッド、２及び３はベッド１
に直立するカラム、４は加熱炉を収容する容器、５は容
器４の蓋、６はカラム２、３に昇降自在に支承された容
器支持アーム、７は蓋５の開閉用アーム、８はヘッド、
９はヘッド８の昇降用アーム、10、11は電極である。Thus, in FIG. 1, 1 is a bed, 2 and 3 are beds 1
, A container for holding a heating furnace, 5 a lid of the container 4, 6 a container support arm supported on the columns 2 and 3 so as to be able to move up and down, 7 an arm for opening and closing the lid 5, and 8 a head ,
Reference numeral 9 denotes an elevating arm of the head 8, and reference numerals 10 and 11 denote electrodes.
後に示すように、加熱炉は容器４内に設けられてい
る。As described later, the heating furnace is provided in the container 4.
容器支持アーム６は、カラム２、３により昇降自在に
支承されており、容器４を昇降せしめる。The container support arm 6 is supported by the columns 2 and 3 so as to be able to move up and down, and moves the container 4 up and down.
蓋開閉アーム７は、作業中は蓋５を容器４に押しつけ
てそれを気密に閉鎖する。The lid opening / closing arm 7 presses the lid 5 against the container 4 during operation to close it tightly.
上側の電極10はヘッド８内に設けた昇降装置（図示せ
ず）により昇降せしめられ、下側の電極11はベッド１内
に設けた昇降装置（図示せず）により昇降せしめられ
る。The upper electrode 10 is raised and lowered by a lifting device (not shown) provided in the head 8, and the lower electrode 11 is raised and lowered by a lifting device (not shown) provided in the bed 1.
第２図により装置の要部に就いて説明する。 The main part of the device will be described with reference to FIG.
第２図中、12は加熱炉、13は例えば耐熱ガラスで製造
された筒状の坩堝、14は坩堝13内に充填された原料、15
は鋳型、16は排気管、17は真空ポンプである。In FIG. 2, 12 is a heating furnace, 13 is a cylindrical crucible made of, for example, heat-resistant glass, 14 is a raw material filled in the crucible 13, 15
Is a mold, 16 is an exhaust pipe, and 17 is a vacuum pump.
加熱炉12は例えばグラファイトで製造されており、そ
の中心部に筒状の炉室を有し、容器４内に固定されてお
り、かつその炉室内には上下の開口からそれぞれ電極10
及び11が挿入される。The heating furnace 12 is made of, for example, graphite, has a cylindrical furnace chamber at the center thereof, is fixed in the container 4, and has electrodes 10 through upper and lower openings in the furnace chamber.
And 11 are inserted.
電極10は、中心に押圧子10aと、その周囲に環状に穿
たれた溝10bとを有する。この押圧子10aの外径は坩堝13
の内径に等しく、又は、溝12bの外径は坩堝13の外径に
等しい。The electrode 10 has a presser 10a at the center and a groove 10b formed annularly around the presser 10a. The outer diameter of the presser 10a is
Or the outer diameter of the groove 12b is equal to the outer diameter of the crucible 13.
加熱炉12の炉室内の、上下の電極10及び11の間の図中
Ａで示されている空間は可変容積の炉室であり、前述の
如く被加熱物の性質、量、鋳型の大きさはその他の条件
に応じて最適な容積となるように、両電極の位置が定め
られ、かつ下側の電極11の上面には鋳型15が設けられ
る。The space indicated by A in the figure between the upper and lower electrodes 10 and 11 in the furnace chamber of the heating furnace 12 is a furnace chamber having a variable volume, and as described above, the properties and quantity of the object to be heated and the size of the mold The positions of the two electrodes are determined so that an optimum volume is obtained according to other conditions, and a mold 15 is provided on the upper surface of the lower electrode 11.
鋳型15の上面には鋳造原料15を充填した筒状の坩堝13
が取り付けられる。坩堝13の下方の端面は鋳型15に接し
ており、上端は電極10に設けた環状の溝10bに挿入され
る。A cylindrical crucible 13 filled with a casting raw material 15 is provided on an upper surface of the mold 15.
Is attached. The lower end surface of the crucible 13 is in contact with the mold 15, and the upper end is inserted into an annular groove 10b provided in the electrode 10.
又、図には省略したが、装置の要部には温度計が装着
されており、それらの出力は後述する制御装置に制御入
力として入力せしめられる。Although not shown in the drawing, thermometers are attached to the main parts of the apparatus, and their outputs are input as control inputs to a control device described later.
鋳造作業中は、容器４の内部は真空ポンプ17により排
気され、真空状態に保たれる。これは溶融した原料14内
のガス抜きと、加熱炉12の外面の断熱のために行うもの
である。During the casting operation, the inside of the container 4 is evacuated by the vacuum pump 17 and kept in a vacuum state. This is performed for degassing the melted raw material 14 and for heat insulation of the outer surface of the heating furnace 12.
又、材料の性質によっては、真空状態ではなく、容器
４内に所望の成分から成る雰囲気ガスを注入して置くこ
ともある。この場合には、その雰囲気ガスの供給装置、
圧力調整装置、排気装置等が付設される。Further, depending on the properties of the material, an atmospheric gas composed of a desired component may be injected into the container 4 instead of the vacuum state. In this case, the supply device of the atmospheric gas,
A pressure adjusting device, an exhaust device and the like are provided.
鋳造を行う際には、まず容器４を引き下げると共に、
電極10及び11を蓋５の上に押し出し、鋳型15を取り付け
ると共に、坩堝13の内部に予め圧縮成形した原料14を装
填する。When performing casting, firstly, while lowering the container 4,
The electrodes 10 and 11 are extruded onto the lid 5, a mold 15 is attached, and a crimp crucible 13 is charged with a raw material 14 which has been compression-molded in advance.
次いで、上下の電極10、11を下げ、鋳型15と坩堝13と
を加熱炉12内に引き入れ、容器４を気密に閉鎖し、真空
ポンプ17を作動させて加熱炉12内及び鋳型15内を真空状
態とする。Next, the upper and lower electrodes 10 and 11 are lowered, the mold 15 and the crucible 13 are drawn into the heating furnace 12, the container 4 is closed airtightly, and the vacuum pump 17 is operated to evacuate the inside of the heating furnace 12 and the inside of the mold 15. State.
而して、この状態で例えば第３図に示すような電源か
らパルス電流が供給される。In this state, for example, a pulse current is supplied from a power source as shown in FIG.
この電流は、加熱炉12の図中Ａで示された部分を通
り、この部分を加熱すると共に、坩堝13内部の原料14を
通って流れ、これにより原料14は間接及び直接に加熱溶
融される。This electric current passes through the portion indicated by A in the figure of the heating furnace 12 and heats this portion and flows through the raw material 14 inside the crucible 13, whereby the raw material 14 is indirectly and directly heated and melted. .
第３図中、20は商用電源に接続される受電端子、21は
整流回路、22は電流制御回路、23は加熱炉12の内部や容
器13の温度を検出するため設けられる温度検出器、24は
A/D変換器、25はCPU、26はパルス幅変調回路、27はスイ
ッチング回路、28及び29はそれぞれ電極10及び11に12〜
16V程度の電圧を供給する給電端子、30は装置の各部に
設けられるアクチュエータ、モータ等の作動制御装置で
ある。3, reference numeral 20 denotes a power receiving terminal connected to a commercial power supply, 21 denotes a rectifier circuit, 22 denotes a current control circuit, 23 denotes a temperature detector provided for detecting the temperature of the inside of the heating furnace 12 and the container 13, 24 Is
A / D converter, 25 is a CPU, 26 is a pulse width modulation circuit, 27 is a switching circuit, 28 and 29 are 12 to 12 for electrodes 10 and 11, respectively.
A power supply terminal 30 for supplying a voltage of about 16 V, and an operation control device 30 such as an actuator and a motor provided in each part of the device.
CPU25には、予め制御プログラムがロードされてお
り、そのプログラムに従って給電パルスのピーク値とパ
ルス幅が制御されるよう構成されている。尚、本実施例
に於いては、最も望ましいものとして給電パルスのピー
ク値とパルス幅を制御するよう説明するが、ピーク値の
制御は必須のものでなく、ピーク値は一定の望まし値に
設定しておいて、パルス幅のみを制御するよう構成して
もよい。A control program is loaded in the CPU 25 in advance, and the peak value and the pulse width of the power supply pulse are controlled according to the program. In this embodiment, the peak value and the pulse width of the power supply pulse are described as being controlled as the most desirable. However, the control of the peak value is not essential, and the peak value is set to a constant desired value. The setting may be made so that only the pulse width is controlled.
坩堝13内の被加熱物、即ち、鋳造用の原料14の温度
は、温度検出器23により検出される。温度検出器23の出
力はA/D変換器24によりデジタル信号に変換される、CPU
25に送られる。The temperature of the object to be heated in the crucible 13, that is, the temperature of the casting raw material 14 is detected by a temperature detector 23. The output of the temperature detector 23 is converted to a digital signal by the A / D converter 24,
Sent to 25.
CPU25は、予め定られたプログラムに従って電流制御
回路22及びパルス幅変調回路26を制御し、原料14の温度
を所定の昇温曲線に合わせて制御する。The CPU 25 controls the current control circuit 22 and the pulse width modulation circuit 26 according to a predetermined program, and controls the temperature of the raw material 14 according to a predetermined temperature rising curve.
原料14が溶融すると、上側の電極10を下降させ、原料
14を鋳型15に設けた湯口から鋳型15内に押し出し、これ
により鋳造が行われる。尚、本実施例では圧力鋳造を示
したが、重力鋳造が望ましい場合にはそれを採用し得る
こと勿論である。そして重力鋳造を行う場合には、電極
10は単純な筒状又は柱状体とすることができる。When the raw material 14 melts, the upper electrode 10 is lowered,
14 is extruded from the gate provided on the mold 15 into the mold 15, whereby casting is performed. Although the pressure casting is shown in this embodiment, it is needless to say that gravity casting can be employed if it is desired. And when performing gravity casting, the electrode
10 can be a simple cylindrical or columnar body.
材料の装填及び被加熱物の取り出しを実行応すると
き、CPU25は、作動制御装置30を介して、図示されてい
ない上下電極昇降用モータ、及びカラム２及び３の内部
に設けられた図示されていない容器支持アーム駆動用モ
ータ、蓋開閉アーム駆動用モータ、ヘッド昇降用アーム
駆動用モータ等の作動を制御する。When loading the material and taking out the object to be heated, the CPU 25, via the operation control device 30, controls the motor for raising and lowering the upper and lower electrodes (not shown) and the illustrated motor provided inside the columns 2 and 3. It controls the operation of the motor for driving the container supporting arm, the motor for driving the lid opening / closing arm, the motor for driving the head lifting / lowering arm, and the like.
電流は加熱すべき物の材質と量により異なるが、通常
は、350A/cm2程度で十分であり、必要な場合１〜３分程
度で被加熱物を3000℃程度で昇温できるので、経済的能
率は極めて高い。The current varies depending on the material and amount of the object to be heated, but usually about 350 A / cm 2 is sufficient, and if necessary, the temperature of the object to be heated can be raised to about 3000 ° C. in about 1 to 3 minutes. The efficiency is extremely high.
又、本発明炉では、炉室の熱容量が少ない上、常にそ
の炉室部分のみが加熱され、然も、被加熱物に適合した
加熱が行われるので、熱高率が極めて高い。Further, in the furnace of the present invention, the heat capacity of the furnace chamber is small, and only the furnace chamber portion is always heated. Naturally, heating suitable for the object to be heated is performed, so that the heat rate is extremely high.
本発明に於いて、電流をパルス状に供給する理由は、
PWMにより正確に温度が制御できることによる。In the present invention, the reason for supplying the current in pulse form is as follows.
This is because the temperature can be accurately controlled by PWM.
パルス電流の周期は、300Hz乃至30KHzとすることがで
きるが、電源価格の点から低周波電源が推奨される。The cycle of the pulse current can be 300 Hz to 30 KHz, but a low-frequency power source is recommended from the viewpoint of power source price.
尚、上記には実施例として鋳造を行うめの装置を示し
たが、本発明装置を鋳造や粉末冶金等の装置として利用
できることは、既に明らかであろう。Although an apparatus for performing casting has been described above as an example, it will be apparent that the apparatus of the present invention can be used as an apparatus for casting or powder metallurgy.
次に、第４図により第二の実施例について説明する。 Next, a second embodiment will be described with reference to FIG.
本実施例は、ゾーンメルテイング用の加熱装置に対す
る応用例であり、図中、33は加熱炉、34は真空容器、35
は耐熱ガラス製の坩堝、36は精製される物質から成る被
加熱物、37は前述の第３図に示したものと同様な電源回
路である。This embodiment is an application example to a heating device for zone melting, in which, in the figure, 33 is a heating furnace, 34 is a vacuum vessel, 35
Is a crucible made of heat-resistant glass, 36 is an object to be heated made of a substance to be purified, and 37 is a power supply circuit similar to that shown in FIG.
最初、坩堝35には原料粉末を加圧成形又は溶融して成
る粗製原料36aが充填されている。First, the crucible 35 is filled with a crude material 36a formed by pressing or melting the material powder.
加熱炉33の軸方向長さは坩堝35のそれに比して極めて
短く、このため、被加熱物36は一時には局部的にしか加
熱されない。The length of the heating furnace 33 in the axial direction is extremely shorter than that of the crucible 35, and therefore, the object 36 to be heated is only locally heated at one time.
加熱炉33の中央部には、薄肉に構成した強発熱部33a
が設けられており、通電が行われると、このくびれた部
分が強く発熱するので、精錬される物質の一部36Bが溶
融せしめられる。In the central part of the heating furnace 33, a strong heating part 33a composed of a thin wall
When energization is performed, the constricted portion strongly generates heat, so that a portion 36B of the material to be refined is melted.
坩堝35は、図示されていない送り装置により予め定め
られた一定の速度で図中下方に移動せしめられており、
このため、加熱炉33内を移動する粗製原料36aは、この
強発熱部33bを通過する際一時的に融点より極僅か高い
温度に加熱されて溶融せしめられ、通過の直後凝固す
る。The crucible 35 is moved downward in the figure at a predetermined constant speed by a feeding device not shown,
For this reason, the crude raw material 36a moving in the heating furnace 33 is temporarily heated to a temperature slightly higher than the melting point when passing through the strong heating part 33b, is melted, and solidifies immediately after passing.
この凝固の際、不純物は凝固する部分から排除され、
溶融部分33b内に取り残されるので、溶融部分36bより下
方の凝固部分36cは精製された純粋物質となる。During this coagulation, impurities are removed from the solidifying part,
The solidified portion 36c below the melted portion 36b becomes a purified pure substance because it is left in the melted portion 33b.
このゾーンメルテイング法により完全な精錬を行うに
は、原材料の溶融と凝固を極めて僅かの温度差で、かつ
出来るだけ狭いゾーン内で行う必要があり、そのために
は精密な温度制御が必要である。In order to perform complete refining by this zone melting method, it is necessary to melt and solidify the raw materials with a very small temperature difference and within the narrowest possible zone, and for that purpose, precise temperature control is required .
本発明によるときは、原料物質の炉内通過速度を適切
に定めることにより、炉室の実効容積を適切に設定で
き、かつ本発明装置に置いては、加熱炉壁の温度を計測
することにより、加熱炉内の溶融状況が正確に把握でき
るから、その温度を検出して所定の温度分布が保たれる
ような電源回路37の出力を制御すれば精密なゾーンメル
テイングが可能となる。According to the present invention, the effective volume of the furnace chamber can be appropriately set by appropriately determining the passage speed of the raw material in the furnace, and in the apparatus of the present invention, by measuring the temperature of the heating furnace wall. Since the melting state in the heating furnace can be accurately grasped, precise zone melting can be performed by detecting the temperature and controlling the output of the power supply circuit 37 so that a predetermined temperature distribution is maintained.
本発明は上記の如く構成されるから、本発明によると
きは、加熱炉内容積を合理的に設定できるので、従来公
知の加熱装置に依る場合に較べて、より正確で迅速な熱
処理が可能となる。Since the present invention is configured as described above, according to the present invention, the internal volume of the heating furnace can be rationally set, so that more accurate and rapid heat treatment can be performed as compared with the case of using a conventionally known heating device. Become.
又、本発明装置では、少量の原料を加熱し、鍛造、鋳
造その他の成形法による成形が可能となり又、ゾーンメ
ルテイングその他の熱処理が可能となるものである。Further, in the apparatus of the present invention, a small amount of raw material can be heated and formed by forging, casting or other forming methods, and zone melting or other heat treatment can be performed.
又、本発明によれば、炉体の熱容量が小さくて済むの
で、通電電流が小さくて済み、このため電源回路が比較
的小容量で足りる。Further, according to the present invention, since the heat capacity of the furnace body can be small, the conduction current can be small, so that the power supply circuit can have a relatively small capacity.
又、本発明装置によれば、磁石材、超硬合金、アマル
ファス合金その他の従来公知の全ての粉末材料、難溶性
材料の処理が可能となる。Further, according to the apparatus of the present invention, it is possible to treat magnet materials, cemented carbides, amalfas alloys and all other conventionally known powder materials and hardly soluble materials.
第１図は本発明にかゝる高速加熱装置の一実施例を示す
正面略図、第２図は第１図に示した装置の主要部の構造
を示す断面図、第３図は電源回路の構成を示す説明図、
第４図は第二の実施例の要部を示す断面図である。 １……ベッド ２、３……カラム ４、34……容器 ５……蓋 ６……真空容器支持アーム ７……蓋開閉アーム ８……ヘッド ９……ヘッド昇降用アーム 10、11……電極 12、33……加熱炉 13、35……耐熱ガラス製坩堝 14……原材料 15……鋳型 16……排気管 17……真空ポンプ 20……商用電源接続端子 21……整流回路 22……電流制御回路 23……温度検出器 24……A/D変換器 25……CPU 26……パルス幅変調回路 27……スイッチング回路 30……作動制御装置 37……電源回路FIG. 1 is a schematic front view showing an embodiment of a high-speed heating apparatus according to the present invention, FIG. 2 is a sectional view showing the structure of a main part of the apparatus shown in FIG. 1, and FIG. Explanatory diagram showing the configuration,
FIG. 4 is a sectional view showing a main part of the second embodiment. 1 Bed 2, 3 Column 4, 34 Container 5 Lid 6 Vacuum container support arm 7 Lid opening / closing arm 8 Head 9 Head elevating arm 10, 11 Electrode 12, 33 Heating furnace 13, 35 Heat-resistant glass crucible 14 Raw material 15 Mold 16 Exhaust pipe 17 Vacuum pump 20 Commercial power connection terminal 21 Rectifier circuit 22 Current Control circuit 23 Temperature detector 24 A / D converter 25 CPU 26 Pulse width modulation circuit 27 Switching circuit 30 Operation controller 37 Power supply circuit
Claims (4)
ら成る高速加熱装置。 （ａ）導電性物質から成り、両端に筒状の開口部を有す
る炉室を具えた加熱炉。 （ｂ）導電性物質から成り、上記加熱炉の筒状の開口部
からそれぞれ炉室内に摺動自在に挿入され、上記加熱炉
と電気的に接続する柱状の一対の通電用電極。 （ｃ）少なくとも上記加熱炉を包蔵する容器。 （ｄ）上記容器内に、所望の気体を供給、排出し得る装
置。 （ｅ）上記通電用電極の位置を制御する装置。 （ｆ）上記一対の通電用電極にパルス電流を供給し得る
電源回路。 （ｇ）上記加熱炉の温度を検出する装置。 （ｈ）上記温度検出装置の出力に応じ、かつ予め定めら
れたプログラムに従って少なくとも上記電源回路の出力
するパルス電流のパルス幅、休止幅及び波高値の内の何
れか一つを制御する装置。1. A high-speed heating apparatus comprising the following components (a) to (h). (A) A heating furnace comprising a furnace chamber made of a conductive material and having cylindrical openings at both ends. (B) A pair of column-shaped energizing electrodes which are made of a conductive material, are slidably inserted into the furnace chamber from the cylindrical openings of the heating furnace, and are electrically connected to the heating furnace. (C) A container that contains at least the heating furnace. (D) A device capable of supplying and discharging a desired gas into the container. (E) A device for controlling the position of the current-carrying electrode. (F) A power supply circuit capable of supplying a pulse current to the pair of conducting electrodes. (G) An apparatus for detecting the temperature of the heating furnace. (H) A device that controls at least one of a pulse width, a pause width, and a peak value of a pulse current output from the power supply circuit according to an output of the temperature detection device and according to a predetermined program.
を気密に閉鎖する蓋を兼ねる請求項１に記載の高速加熱
装置。2. The high-speed heating apparatus according to claim 1, wherein the pair of current-carrying electrodes also serves as a lid for hermetically closing a cylindrical opening of the heating furnace.
圧、圧縮し得る押圧子を有する請求項１に記載の高速加
熱装置。3. The high-speed heating apparatus according to claim 1, wherein one of the pair of current-carrying electrodes has a pressing element capable of pressing and compressing the object to be heated.
ら成る高速加熱装置。 （ｉ）導電性物質から成り、両端に筒状の開口部を有す
る炉室を具えた加熱炉。 （ｊ）少なくとも上記加熱炉を包蔵する容器。 （ｋ）上記容器内に、所望の気体を供給、排出し得る装
置。 （ｌ）上記加熱炉の両端部にパルス電流を供給し得る電
源回路。 （ｍ）その内部に被加熱物を収容し、上記加熱炉を貫通
するよう、その開口部から炉室内に摺動自在に挿入され
る筒状の被加熱物容器。 （ｎ）上記加熱炉又は被加熱物の温度を検出する装置。 （ｏ）上記温度検出装置の出力に応じ、かつ予め定めら
れたプログラムに従って少なくとも上記電源回路の出力
するパルス電流のパルス幅、休止幅及び波高値の内の何
れか一つと、上記被加熱物の位置及び移動速度とを制御
する装置。4. A high-speed heating device comprising the following components (i) to (o). (I) A heating furnace comprising a furnace chamber made of a conductive substance and having cylindrical openings at both ends. (J) A container that contains at least the heating furnace. (K) A device capable of supplying and discharging a desired gas into the container. (L) A power supply circuit capable of supplying a pulse current to both ends of the heating furnace. (M) A cylindrical object-to-be-heated container which accommodates the object to be heated therein and is slidably inserted into the furnace chamber from an opening thereof so as to penetrate the heating furnace. (N) An apparatus for detecting the temperature of the heating furnace or the object to be heated. (O) at least one of a pulse width, a pause width, and a peak value of a pulse current output from the power supply circuit in accordance with an output of the temperature detection device and in accordance with a predetermined program; A device that controls position and movement speed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22748089A JP2758228B2 (en) | 1989-09-04 | 1989-09-04 | High-speed heating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22748089A JP2758228B2 (en) | 1989-09-04 | 1989-09-04 | High-speed heating device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0391692A JPH0391692A (en) | 1991-04-17 |
| JP2758228B2 true JP2758228B2 (en) | 1998-05-28 |
Family
ID=16861542
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22748089A Expired - Lifetime JP2758228B2 (en) | 1989-09-04 | 1989-09-04 | High-speed heating device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2758228B2 (en) |
-
1989
- 1989-09-04 JP JP22748089A patent/JP2758228B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0391692A (en) | 1991-04-17 |
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