JP2001220659A - Intermittently driven vacuum carburizing furnace - Google Patents
Intermittently driven vacuum carburizing furnaceInfo
- Publication number
- JP2001220659A JP2001220659A JP2000029033A JP2000029033A JP2001220659A JP 2001220659 A JP2001220659 A JP 2001220659A JP 2000029033 A JP2000029033 A JP 2000029033A JP 2000029033 A JP2000029033 A JP 2000029033A JP 2001220659 A JP2001220659 A JP 2001220659A
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- JP
- Japan
- Prior art keywords
- chamber
- furnace
- processing
- treatment
- station
- 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.)
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Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、真空状態下で浸炭
処理する間欠駆動式真空浸炭炉に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an intermittently driven vacuum carburizing furnace for carburizing under a vacuum condition.
【０００２】[0002]
【従来の技術】従来、内部に被処理物を装入し、搬出す
るコンベアをそれぞれ有し、互いに扉で区画された浸炭
処理室、拡散処理室および冷却室を直線的に配置した間
欠駆動式真空浸炭炉は公知である（特公平2-48618号公
報）。この真空浸炭炉では、複数の被処理部品を収容し
たトレイを前記コンベア上に載置し、所定の時間間隔で
前記扉を開閉するとともに、これに合わせて前記コンベ
アを間欠駆動することにより被処理物の浸炭処理がなさ
れるようになっている。2. Description of the Related Art Conventionally, an intermittent drive system in which a carburizing processing chamber, a diffusion processing chamber, and a cooling chamber, each having a conveyor for loading and unloading an object to be processed therein and separated from each other by a door, are linearly arranged. Vacuum carburizing furnaces are known (Japanese Patent Publication No. 2-48618). In this vacuum carburizing furnace, a tray containing a plurality of components to be processed is placed on the conveyor, the door is opened and closed at predetermined time intervals, and the conveyor is intermittently driven in accordance with the opening and closing. Carburizing of the material is performed.
【０００３】[0003]
【発明が解決しようとする課題】真空浸炭炉における浸
炭処理は、真空状態下で被処理物を所定の浸炭処理温度
まで加熱した後、この被処理物を所定時間浸炭性ガスの
雰囲気中に曝すことにより行われる。ところが、前述し
た真空浸炭炉では、複数の被処理物を一つのトレイに収
容して、同時に処理するため、温度差がトレイ上の異な
る位置における異なる被処理物の間で、或は一つの被処
理物における異なる部分の間で生じ、また被処理物の浸
炭性ガスとの接触ムラ、さらに浸炭処理後における被処
理物の冷却ムラが生じる。その結果、均一な浸炭が行え
ないという問題がある。本発明は、斯る従来の問題点を
なくすことを課題としてなされたもので、均一な浸炭を
可能とした間欠駆動式真空浸炭炉を提供しようとするも
のである。In the carburizing process in a vacuum carburizing furnace, after the object to be treated is heated to a predetermined carburizing temperature in a vacuum state, the object is exposed to a carburizing gas atmosphere for a predetermined time. This is done by: However, in the vacuum carburizing furnace described above, since a plurality of objects to be processed are accommodated in one tray and processed at the same time, the temperature difference is different between different objects at different positions on the tray or one object. The unevenness occurs between different portions of the object to be treated, the contact unevenness of the object to be treated with the carburizing gas, and the unevenness of cooling of the object after the carburizing treatment. As a result, there is a problem that uniform carburization cannot be performed. SUMMARY OF THE INVENTION The present invention has been made to solve the conventional problems, and has as its object to provide an intermittently driven vacuum carburizing furnace capable of performing uniform carburization.
【０００４】[0004]
【課題を解決するための手段】上記課題を解決するため
に、第一発明は、真空排気可能な密閉空間を形成すると
ともに、この密閉空間内に下部開口を有する複数の処理
室を同一円に沿って等間隔で配設することにより処理ス
テーションを形成し、この処理ステーション毎に前記処
理室を加熱或は冷却或は真空排気或は所望ガスの供給の
少なくともいずれかが可能に形成した円形の炉本体と、
この炉本体内に昇降可能かつ回転可能に設けられ、被処
理物を載置させる支持部を有し、前記処理室の下部開口
を閉じる蓋体を前記処理室に対向して備えた回転炉床
と、この回転炉床を昇降させ、所望角度ずつ間欠的に回
転させる駆動部と、前記炉本体に設けられ、被処理物を
前記支持部に送出す装入室と、この装入室に近接して前
記炉本体に設けられ、被処理物を焼入れ処理する抽出室
とからなる構成とした。According to a first aspect of the present invention, a closed space capable of evacuating and forming a plurality of processing chambers having a lower opening in the closed space is formed in the same circle. A processing station is formed by arranging the processing chambers at equal intervals along each of the processing stations, and the processing chamber is heated and cooled or evacuated and / or a desired gas is supplied for each processing station. A furnace body,
A rotary hearth, which is provided in the furnace main body so as to be able to move up and down and rotatably, has a support portion on which an object to be processed is placed, and has a lid for closing a lower opening of the processing chamber facing the processing chamber. A driving unit that raises and lowers the rotary hearth and intermittently rotates the rotary hearth by a desired angle; a charging chamber that is provided in the furnace main body and sends out an object to be processed to the support unit; And an extraction chamber provided in the furnace main body for quenching the workpiece.
【０００５】また、第二発明は、第一発明の構成に加え
て、前記処理室の加熱が誘導加熱である構成とした。[0005] Further, the second invention has a configuration in which the heating of the processing chamber is induction heating in addition to the configuration of the first invention.
【０００６】[0006]
【発明の実施の形態】次に、本発明の実施形態を図面に
したがって説明する。図１〜４に示すように、本発明に
係る間欠駆動式真空浸炭炉Ｔは、炉本体１、炉本体１内
に設けられた回転炉床２、回転炉床２を作動させる駆動
部３および近接して炉本体１に接続する装入室４と抽出
室５とからなっている。炉本体１は真空ポンプにより真
空排気可能（０．１〜１Torr）な密閉空間１１を形成し
ている。また、炉本体１は円形に形成され、その密閉空
間１１には、同一円に沿って、かつ等間隔で複数の処理
室１２が配設されている。この処理室１２の下部は開口
しており、処理室１２の下方空間部の内外には、同心円
状に大小の保熱板１３Ａ，１３Ｂが配置されている。Next, embodiments of the present invention will be described with reference to the drawings. As shown in FIGS. 1 to 4, an intermittently driven vacuum carburizing furnace T according to the present invention includes a furnace body 1, a rotary hearth 2 provided in the furnace body 1, a driving unit 3 for operating the rotary hearth 2, and It comprises a charging chamber 4 and an extraction chamber 5 which are connected to the furnace body 1 in close proximity. The furnace main body 1 forms a sealed space 11 that can be evacuated (0.1 to 1 Torr) by a vacuum pump. Further, the furnace main body 1 is formed in a circular shape, and a plurality of processing chambers 12 are arranged in the closed space 11 along the same circle at equal intervals. The lower portion of the processing chamber 12 is open, and large and small heat retaining plates 13A and 13B are arranged concentrically inside and outside the space below the processing chamber 12.
【０００７】図２および３では、Ｎｏ．１〜Ｎｏ．１５
までの処理室１２が設けられ、それぞれ処理ステーショ
ンを形成する一方、Ｎｏ．１の処理室１２とＮｏ．１５
の処理室１２の間は空きステーションとなっており、各
処理ステーションで順番に前処理、浸炭処理および後処
理等が行われる。浸炭部の結晶粒微細化処理を行わない
場合について具体例を挙げると、例えばＮｏ．１ステー
ションの処理室１２では誘導加熱処理、Ｎｏ．２〜６ス
テーションの処理室１２では浸炭処理、、Ｎｏ．７〜１
３ステーションの処理室１２では拡散処理、Ｎｏ．１４
およびＮｏ．１５ステーションの処理室１２では冷却処
理が行われる。これに対して、浸炭部の結晶粒微細化処
理を行う場合には、例えばＮｏ．１ステーションの処理
室１２では誘導加熱処理、Ｎｏ．２〜５ステーションの
処理室１２では浸炭処理、Ｎｏ．６〜１２ステーション
の処理室１２では拡散処理、Ｎｏ．１３およびＮｏ．１
４ステーションの処理室１２では冷却処理、Ｎｏ．１５
ステーションの処理室１２では再誘導加熱・均熱処理が
行われる。[0007] In FIGS. 1 to No. Fifteen
Process chambers 12 are provided to form processing stations, respectively. No. 1 processing chamber 12 and no. Fifteen
An empty station is provided between the processing chambers 12, and pre-processing, carburizing processing, post-processing, and the like are sequentially performed in each processing station. A specific example of the case where the grain refinement treatment of the carburized portion is not performed is as follows. In the processing chamber 12 of one station, the induction heating process was performed. In the processing chambers 12 of 2 to 6 stations, carburizing treatment was performed. 7-1
In the processing chamber 12 of the three stations, the diffusion processing was performed. 14
And No. A cooling process is performed in the processing chambers 12 of the 15 stations. On the other hand, when performing the grain refinement treatment of the carburized part, for example, In the processing chamber 12 of one station, the induction heating process was performed. In the processing chambers 12 of 2 to 5 stations, carburizing treatment was performed. In the processing chambers 12 of the stations 6 to 12, the diffusion processing was performed. 13 and No. 1
In the processing chamber 12 of the four stations, the cooling process was performed. Fifteen
In the processing chamber 12 of the station, re-induction heating / soaking is performed.
【０００８】ところで、前述した誘導加熱処理のための
ステーションおよび再誘導加熱・均熱処理のためのステ
ーションでは、処理室１２の壁部に加熱手段１４、例え
ば誘導加熱コイルが埋設され、前記浸炭処理のためのス
テーションおよび前記拡散処理のためのステーションで
は、処理室１２の壁部は断熱材により形成され、内壁面
にはヒータ１５が設けられている。また、前記冷却処理
のためのステーションでは、冷却手段、例えば冷却ファ
ンが設けられている。さらに、前記浸炭処理のためのス
テーションおよび拡散処理のためのステーションでは、
処理室１２内への浸炭性ガス（例：Ｃ3Ｈ8ガス）の供給
（１〜５０Torr）が可能となっているのに加えて、処理
室１２内を真空ポンプによる真空排気（０．１〜１Tor
r）が可能となっている。なお、装入室４の出口側にお
ける炉本体１内の部分、および抽出室５に至る炉本体１
内の部分には被処理物Ｗの移動を円滑にするための中間
ガイドレール１６Ａ，１６Ｂが設けられており、抽出側
の中間ガイドレール１６Ｂの側方には、被処理物Ｗを抽
出するための第一抽出プッシャ１７が設けられている。
また、炉本体１と装入室４および炉本体１と抽出室５と
の間には、開閉可能に中間扉１８Ａ，１８Ｂが設けられ
ており、これらの中間扉１８Ａ，１８Ｂを閉じることに
より炉本体１は密閉される。In the above-described station for induction heating and the station for re-induction heating / soaking, a heating means 14, for example, an induction heating coil, is buried in the wall of the processing chamber 12, and the carburizing treatment is performed. And a station for the diffusion process, a wall of the processing chamber 12 is formed of a heat insulating material, and a heater 15 is provided on an inner wall surface. In the station for the cooling process, a cooling means, for example, a cooling fan is provided. Further, in the station for carburizing treatment and the station for diffusion treatment,
In addition to being able to supply a carburizing gas (eg, C 3 H 8 gas) into the processing chamber 12 (1 to 50 Torr), the inside of the processing chamber 12 is evacuated by a vacuum pump (0.1 to 0.1 Torr). ~ 1Tor
r) is possible. Note that a portion inside the furnace body 1 on the outlet side of the charging chamber 4 and the furnace body 1 reaching the extraction chamber 5
Intermediate guide rails 16A and 16B for smoothing the movement of the workpiece W are provided in the inner portion, and the workpiece W is extracted beside the intermediate guide rail 16B on the extraction side. The first extraction pusher 17 is provided.
Further, intermediate doors 18A and 18B are provided between the furnace main body 1 and the charging chamber 4 and between the furnace main body 1 and the extraction chamber 5 so as to be openable and closable, and by closing these intermediate doors 18A and 18B, the furnace is opened. The main body 1 is sealed.
【０００９】回転炉床２はシール手段を介して炉本体１
の下部を貫いた軸２１に一体結合された円形テーブル２
２を有している。この円形テーブル２２上には、処理室
１２の下部開口に対向して蓋体２３が配設され、蓋体２
３は上面に被処理物Ｗを載置させるための支持部２４を
有している。駆動部３は炉本体１の下方に設置された昇
降テーブル装置３１とこの昇降テーブル装置３１上に配
置されたモータ３２とを有している。そして、軸２１お
よび円形テーブル２２は昇降テーブル装置３１により軸
２１が昇降させられるとともに、モータ３２により歯車
機構３３を介して図１中矢印Ｘで示すように所望角度ず
つ、即ち１ピッチずつ間欠的に回転させられる。なお、
この昇降テーブル３１により軸２１とともに蓋体２３が
上昇することにより処理室１２の下部開口は閉じられ、
密閉空間が形成される。これに対して、蓋体２３が下降
すると、被処理物Ｗは前記保熱板１３Ａ，１３Ｂに挟ま
れた状態となり、被処理物Ｗの保温が図られている。The rotary hearth 2 is connected to the furnace body 1 via a sealing means.
Table 2 integrally connected to a shaft 21 passing through the lower part of the table
Two. A lid 23 is disposed on the circular table 22 so as to face the lower opening of the processing chamber 12.
Reference numeral 3 has a support portion 24 on which the workpiece W is placed. The drive unit 3 has a lifting table device 31 installed below the furnace main body 1 and a motor 32 disposed on the lifting table device 31. The shaft 21 and the circular table 22 are moved up and down by a lifting table device 31 and intermittently at desired angles, that is, one pitch at a time by a motor 32 via a gear mechanism 33 as shown by an arrow X in FIG. Rotated. In addition,
The lower opening of the processing chamber 12 is closed by raising the lid 23 together with the shaft 21 by the lifting table 31,
An enclosed space is formed. On the other hand, when the lid 23 is lowered, the object W is sandwiched between the heat retaining plates 13A and 13B, and the object W is kept warm.
【００１０】装入室４は前述したＮｏ．１ステーション
の処理室１２に向けて、かつ中間扉１８Ａを包含するよ
うに設けられ、側部に被処理物Ｗを装入するための装入
扉４１を有している。また、装入室４内には、被処理物
Ｗを支持するとともに、前記中間ガイドレール１６Ａに
導くための装入ガイドレール４２Ａが設けられ、装入ガ
イドレール４２Ａ上の被処理物Ｗは装入プッシャ４３に
より前記中間ガイドレール１６Ａを経て、Ｎｏ．１の処
理室１２に対向する支持部２４上の定位置に送込まれ
る。なお、この装入室４内は、真空ポンプにより真空排
気可能（０．１〜１Torr）となっている。The charging room 4 is provided with the above-mentioned No. It is provided toward the processing chamber 12 of one station and includes the intermediate door 18A, and has a loading door 41 on a side portion for loading the workpiece W. In the loading chamber 4, a loading guide rail 42A for supporting the workpiece W and guiding the workpiece W to the intermediate guide rail 16A is provided, and the workpiece W on the loading guide rail 42A is mounted. No. through the intermediate guide rail 16A by the input pusher 43. It is sent to a fixed position on the support part 24 facing the one processing chamber 12. The interior of the charging chamber 4 can be evacuated by a vacuum pump (0.1 to 1 Torr).
【００１１】抽出室５は、前述したＮｏ．１５ステーシ
ョンの処理室１２に向けて、かつ中間扉１８Ｂを包含す
るように設けられ、側部に被処理物Ｗを抽出するための
抽出扉５１を有している。また、抽出室５内には、被処
理物Ｗを支持する抽出ガイドレール４２Ｂが設けられ、
支持部２４上の被処理物Ｗは第一抽出プッシャ１７によ
り前記中間ガイドレール１６Ｂを経て、前記抽出ガイド
レール４２Ｂの定位置に送込まれる。さらに、抽出室５
内には、前記抽出ガイドレール４２Ｂ上の被処理物Ｗを
受取り、抽出室５の下部の焼入れ槽５２に浸した後、受
取り位置まで上昇させる昇降手段５３が設けられてい
る。この上昇した昇降手段５３上の被処理物Ｗは第二抽
出プッシャ５４により室外に抽出される。なお、この抽
出室５は、この内部への雰囲気ガス（例：Ｎ2）の供
給、およびこの内部を真空ポンプによる真空排気（０．
１〜１Torr）が可能に形成されている。The extraction chamber 5 is provided with the aforementioned No. It is provided toward the processing chamber 12 of 15 stations and includes the intermediate door 18B, and has an extraction door 51 for extracting the workpiece W on a side portion. In the extraction chamber 5, an extraction guide rail 42B that supports the workpiece W is provided.
The workpiece W on the support portion 24 is sent to the fixed position of the extraction guide rail 42B via the intermediate guide rail 16B by the first extraction pusher 17. Furthermore, extraction room 5
Elevating means 53 for receiving the workpiece W on the extraction guide rail 42B, immersing the workpiece W in the quenching tank 52 below the extraction chamber 5, and then raising the workpiece W to the receiving position is provided therein. The processed object W on the raised elevating means 53 is extracted outside by the second extraction pusher 54. The extraction chamber 5 is supplied with an atmospheric gas (eg, N 2 ) therein, and is evacuated (0.
(1 to 1 Torr).
【００１２】次に、前記構成からなる真空浸炭炉に適用
される真空浸炭プロセスを図５に示す浸炭部の結晶粒微
細化をしない場合と図６に示す浸炭部の結晶粒微細化を
する場合の二通りの場合に分けて説明する。 （１）浸炭部の結晶粒微細化をしない場合 第一ステップで、装入扉４１を開いて、被処理物Ｗであ
る鋼材部品、例えば歯車等を装入室４内に装入し、装入
扉４１を閉じた後、装入室４内を炉本体１内と略同じ圧
力（約１Torr）まで真空排気する。Next, the vacuum carburizing process applied to the vacuum carburizing furnace having the above-described configuration is performed in a case where the crystal grains are not refined in the carburized portion shown in FIG. 5 and in a case where the crystal grains are refined in the carburized portion shown in FIG. The two cases will be described separately. (1) In the case where the crystal grains are not refined in the carburized part In the first step, the charging door 41 is opened, and the steel material component to be processed W, for example, a gear or the like is charged into the charging chamber 4, and the charging is performed. After closing the entrance door 41, the inside of the charging chamber 4 is evacuated to a pressure substantially equal to that of the inside of the furnace body 1 (about 1 Torr).
【００１３】第二ステップで、中間扉１８Ａを開き、被
処理物Ｗを装入プッシャ４３によりＮｏ．１ステーショ
ンの支持台２４上に送込む。なお、この送込みの際、回
転炉床２は下降し、停止状態にあり、前述のように処理
室１２の下部開口は開放されている。第三ステップで、
中間扉１８Ａを閉じ、回転炉床２を上昇させ、各処理室
１２の下部開口を蓋体２３により塞ぐとともに、密閉状
態の処理室１２内に被処理物Ｗを位置させる。In the second step, the intermediate door 18A is opened, and the workpiece W is loaded into the No. 1 by the loading pusher 43. It is sent onto the support stand 24 of one station. At the time of this feeding, the rotary hearth 2 is lowered and is in a stopped state, and the lower opening of the processing chamber 12 is open as described above. In the third step,
The intermediate door 18A is closed, the rotary hearth 2 is lifted, the lower openings of the processing chambers 12 are closed by the lids 23, and the workpiece W is positioned in the processing chamber 12 in a closed state.
【００１４】第四ステップで、所定時間が経過するのを
待ち、その後回転炉床２を下降させ、１ピッチだけ回転
させる。被処理物Ｗが抽出ステーションであるＮｏ．１
５ステーションに到達するまで前記第一〜第四ステップ
を繰返し、その後、前記第二ステップでの被処理物Ｗの
送込みと並行して、中間扉１８Ｂを開き、被処理物Ｗを
炉本体１内と略同一圧力（約１Torr）の抽出室５内に抽
出した後、中間扉１８Ｂを閉じる動作が繰返される。In a fourth step, the controller waits for a predetermined time to elapse, and then lowers the rotary hearth 2 to rotate it by one pitch. The workpiece W is the extraction station No. 1
The first to fourth steps are repeated until reaching the fifth station, and then, in parallel with the feeding of the workpiece W in the second step, the intermediate door 18B is opened and the workpiece W is After the extraction into the extraction chamber 5 at substantially the same pressure (about 1 Torr) as the inside, the operation of closing the intermediate door 18B is repeated.
【００１５】そして、回転炉床２上の被処理物Ｗは１ピ
ッチずつ回転させられ、密閉状態にされた各ステーショ
ンにて以下の処理を受ける。まず、誘導加熱ステーショ
ンであるＮｏ．１ステーションでは、被処理物Ｗは炉本
体１内と略同一圧力下（約１Torr）で約９８０℃の浸炭
処理温度まで加熱される。浸炭ステーションであるＮ
ｏ．２〜６ステーションの各々では、処理室Ｗ内を浸炭
処理温度に保持しつつ前述した浸炭性ガスを導入するこ
とにより約５０Torrの圧力にして、この状態を所定時間
維持した後、処理室Ｗ内を炉本体１内と略同圧（約１To
rr）になるまで真空排気が行われる。したがって、被処
理物Ｗは、Ｎｏ．２ステーションからＮｏ．６ステーシ
ョンを経る過程で、浸炭処理温度に保たれつつ回転炉床
２回転時間間隔と同じ時間間隔で約５０Torrの圧力状態
と約１Torrの圧力状態に繰返し曝されて浸炭処理され
る。The workpiece W on the rotary hearth 2 is rotated one pitch at a time, and undergoes the following processing at each station in a closed state. First, the induction heating station No. In one station, the workpiece W is heated to a carburizing temperature of about 980 ° C. at substantially the same pressure (about 1 Torr) as in the furnace body 1. N which is a carburizing station
o. In each of the stations 2 to 6, the pressure in the processing chamber W is maintained at a pressure of about 50 Torr by introducing the above-described carburizing gas while maintaining the inside of the processing chamber W at a carburizing temperature, and after maintaining this state for a predetermined time, At the same pressure as the inside of the furnace body 1 (about 1 To
Evacuation is performed until rr). Therefore, the workpiece W is no. No. 2 station In the course of passing through six stations, the carburizing treatment is carried out by repeatedly being exposed to a pressure state of about 50 Torr and a pressure state of about 1 Torr at the same time interval as the rotation time of the rotary hearth while maintaining the carburizing temperature.
【００１６】拡散ステーションであるＮｏ．７〜１３ス
テーションの各々では、被処理物Ｗは浸炭処理温度に保
たれつつ約１Torrの真空状態に曝されて拡散処理され
る。冷却ステーションであるＮｏ．１４，１５ステーシ
ョンの各々では、被処理物Ｗは炉本体１内と略同一圧力
下（約１Torr）で徐冷され、Ｎｏ．１５ステーションで
焼入れ温度（例：約８５０℃）まで降温され、その後前
述したように炉本体１内と略同一圧力（約１Torr）の抽
出室５内に抽出される。そして、この被処理物Ｗは昇降
手段５３上に位置させられ、中間扉１８Ｂが閉じられて
抽出室５は密閉される。The diffusion station No. In each of the stations 7 to 13, the workpiece W is exposed to a vacuum state of about 1 Torr while being maintained at the carburizing temperature, and is subjected to diffusion processing. The cooling station No. At each of the stations 14 and 15, the workpiece W is gradually cooled under substantially the same pressure (about 1 Torr) as in the furnace main body 1. At 15 stations, the temperature is lowered to the quenching temperature (eg, about 850 ° C.), and then extracted into the extraction chamber 5 at substantially the same pressure (about 1 Torr) as in the furnace body 1 as described above. Then, the workpiece W is positioned on the elevating means 53, the intermediate door 18B is closed, and the extraction chamber 5 is sealed.
【００１７】この密閉された抽出室５には、雰囲気ガス
（例：Ｎ2）が約６５０Torrになるまで供給され、その
後被処理物Ｗは昇降手段５３により焼入れ槽５２内に所
定時間浸され、焼入れ処理される。被処理物Ｗが昇降装
置５３により焼入れ槽５２から出されると、抽出室５内
は略大気圧状態にされ、続いて抽出扉５１が開かれて被
処理物Ｗは第二抽出プッシャ５４により室外に搬出され
る。その後、抽出扉５１が閉じられ、抽出室５内は炉本
体１内と略同一圧力（約１Torr）にされる。図５は前述
した各ステーションを巡回する処理室１２における雰囲
気の温度状態は実線で、圧力状態は二点鎖線で示したも
ので、図中Iは誘導加熱処理、IIは浸炭処理、IIIは拡散
処理、IVは冷却処理、Vは焼入れ処理を表している。Atmosphere gas (eg, N 2 ) is supplied to the sealed extraction chamber 5 until the gas reaches about 650 Torr. Thereafter, the workpiece W is immersed in a quenching tank 52 by a lifting means 53 for a predetermined time. It is quenched. When the workpiece W is taken out of the quenching tank 52 by the elevating device 53, the inside of the extraction chamber 5 is brought to a substantially atmospheric pressure state, and then the extraction door 51 is opened, and the workpiece W is removed by the second extraction pusher 54. To be carried out. Thereafter, the extraction door 51 is closed, and the pressure in the extraction chamber 5 is set to substantially the same pressure (about 1 Torr) as in the furnace body 1. FIG. 5 shows the temperature state of the atmosphere in the processing chamber 12 circulating through each of the above-mentioned stations by a solid line, and the pressure state by a two-dot chain line. In the figure, I is an induction heating treatment, II is a carburizing treatment, and III is a diffusion treatment. Treatment, IV represents cooling treatment, and V represents quenching treatment.
【００１８】（２）浸炭部の結晶粒微細化をする場合 前述した第一〜第四ステップを繰返し、その後、前記同
様に前記第二ステップでの被処理物Ｗの送込みと並行し
て、中間扉１８Ｂを開き、被処理物Ｗを炉本体１内と略
同一圧力（約１Torr）の抽出室５内に抽出した後、中間
扉１８Ｂを閉じる動作が繰返される。(2) Case of Refining Grain in Carburized Section The first to fourth steps described above are repeated, and then, in parallel with the feeding of the workpiece W in the second step as described above, After opening the intermediate door 18B and extracting the workpiece W into the extraction chamber 5 at substantially the same pressure (about 1 Torr) as the inside of the furnace main body 1, the operation of closing the intermediate door 18B is repeated.
【００１９】そして、回転炉床２上の被処理物Ｗは１ピ
ッチずつ回転させられ、密閉状態にされた各ステーショ
ンにて以下の処理を受ける。まず、誘導加熱ステーショ
ンであるＮｏ．１ステーションでは、被処理物Ｗは炉本
体１内と略同一圧力下で約１０５０℃の浸炭処理温度ま
で加熱される。浸炭ステーションであるＮｏ．２〜５ス
テーションの各々では、処理室Ｗ内を浸炭処理温度に保
持しつつ前述した浸炭性ガスを導入することにより約５
０Torrの圧力にして、この状態を所定時間維持した後、
処理室Ｗ内を炉本体１内と略同圧（約１Torr）になるま
で真空排気が行われる。したがって、被処理物Ｗは、Ｎ
ｏ．２ステーションからＮｏ．５ステーションを経る過
程で、浸炭処理温度に保たれつつ回転炉床２回転時間間
隔と同じ時間間隔で約５０Torrの圧力状態と約１Torrの
圧力状態に繰返し曝されて浸炭処理される。The workpiece W on the rotary hearth 2 is rotated one pitch at a time, and undergoes the following processing at each station in a closed state. First, the induction heating station No. In one station, the workpiece W is heated to a carburizing temperature of about 1050 ° C. under substantially the same pressure as in the furnace body 1. The carburizing station No. In each of the stations 2 to 5, by introducing the above-mentioned carburizing gas while maintaining the inside of the processing chamber W at the carburizing temperature, about 5
After maintaining this state for a predetermined time at a pressure of 0 Torr,
Vacuum evacuation is performed until the inside of the processing chamber W has substantially the same pressure (about 1 Torr) as the inside of the furnace main body 1. Therefore, the workpiece W is N
o. No. 2 station In the course of passing through five stations, the carburizing treatment is carried out by repeatedly being exposed to a pressure state of about 50 Torr and a pressure state of about 1 Torr at the same time interval as two rotations of the rotary hearth while maintaining the carburizing temperature.
【００２０】拡散ステーションであるＮｏ．６〜１２ス
テーションの各々では、被処理物Ｗは浸炭処理温度に保
たれつつ約１Torrの真空状態に曝されて拡散処理され
る。冷却ステーションであるＮｏ．１３，１４ステーシ
ョンの各々では、被処理物Ｗは炉本体１内と略同一圧力
下（約１Torr）で急冷され、Ｎｏ．１４ステーションで
再結晶温度以下（例：約５００℃）まで降温される。再
誘導加熱、均熱ステーションであるＮｏ．１５ステーシ
ョンでは、一旦冷却された被処理物Ｗは再度焼入れ温度
（例：約８７０℃）まで加熱され、その後前述したよう
に炉本体１内と略同一圧力（約１Torr）の抽出室５内に
抽出される。そして、この被処理物Ｗは昇降手段５３上
に位置させられ、中間扉１８Ｂが閉じられて抽出室５は
密閉される。以下、抽出室５では前記同様の動作および
処理がなされる。図６は前述した各ステーションを巡回
する処理室１２における雰囲気の温度状態は実線で、圧
力状態は二点鎖線で示したもので、図中Iは誘導加熱処
理、IIは浸炭処理、IIIは拡散処理、IVは冷却処理、Vは
再誘導加熱・均熱処理、VIは焼入れ処理を表している。The diffusion station No. In each of the stations 6 to 12, the workpiece W is exposed to a vacuum state of about 1 Torr while being maintained at the carburizing temperature and is subjected to diffusion processing. The cooling station No. At each of the stations 13 and 14, the workpiece W was quenched at substantially the same pressure (about 1 Torr) as in the furnace main body 1; At 14 stations, the temperature is lowered to below the recrystallization temperature (eg, about 500 ° C.). No. which is a re-induction heating and soaking station At the fifteenth station, the workpiece W once cooled is heated again to the quenching temperature (eg, about 870 ° C.), and thereafter, into the extraction chamber 5 at substantially the same pressure (about 1 Torr) as in the furnace body 1 as described above. Is extracted. Then, the workpiece W is positioned on the elevating means 53, the intermediate door 18B is closed, and the extraction chamber 5 is sealed. Hereinafter, the same operation and processing as described above are performed in the extraction chamber 5. FIG. 6 shows the temperature state of the atmosphere in the processing chamber 12 circulating through each of the above-described stations by a solid line, and the pressure state by a two-dot chain line. Treatment, IV represents cooling treatment, V represents re-induction heating / soaking heat treatment, and VI represents quenching treatment.
【００２１】なお、本発明は、回転炉床２上のステーシ
ョンの数、各処理に対応するステーションの数、圧力条
件、温度条件および供給ガスおよび雰囲気ガスの種類を
何等限定するものではない。It should be noted that the present invention does not limit the number of stations on the rotary hearth 2, the number of stations corresponding to each process, the pressure conditions, the temperature conditions, and the types of supply gas and atmosphere gas.
【００２２】[0022]
【発明の効果】以上の説明より明らかなように、第一発
明によれば、真空排気可能な密閉空間内に下部開口を有
する複数の処理室を同一円に沿って等間隔で配設するこ
とにより処理ステーションを形成し、この処理ステーシ
ョン毎に前記処理室を加熱或は冷却或は真空排気或は所
望ガスの供給の少なくともいずれかが可能に形成した円
形の炉本体と、この炉本体内に昇降可能かつ回転可能に
設けられ、被処理物を載置させる支持部を有し、前記処
理室の下部開口を閉じる蓋体を前記処理室に対向して備
えた回転炉床とを設け、この回転炉床を昇降させ、所望
角度ずつ間欠的に回転させるながら浸炭処理およびその
前処理、後処理を行うようにしてある。このため、被処
理物を一つずつ処理できる結果、均一な浸炭が可能にな
るという効果を奏する。また、浸炭処理を複数の処理室
を経由させて行うことができ、これにより各処理室に被
処理物の吸収炭素量に応じた浸炭性ガスを送込むことが
でき、即ち浸炭処理の初めでは浸炭性ガスを多くし、終
わりに近付く程浸炭性ガスを少なくすることにより煤の
発生を抑制することができる他、処理条件を異にする被
処理物を並行して処理することが可能になる等の効果を
奏する。As is apparent from the above description, according to the first aspect, a plurality of processing chambers having a lower opening are arranged at equal intervals along the same circle in a closed space capable of evacuating. A processing furnace is formed, and the processing chamber is heated, cooled, evacuated and / or supplied with a desired gas for each processing station. A rotary hearth, which is provided rotatably and rotatably, has a support portion on which the object to be processed is mounted, and has a lid for closing the lower opening of the processing chamber facing the processing chamber; The rotary hearth is raised and lowered, and carburizing treatment and pre-treatment and post-treatment are performed while intermittently rotating by a desired angle. For this reason, as a result of being able to process the to-be-processed object one by one, there is an effect that uniform carburization becomes possible. In addition, the carburizing treatment can be performed through a plurality of treatment chambers, whereby a carburizing gas according to the amount of carbon absorbed by the object to be treated can be sent to each treatment chamber, that is, at the beginning of the carburizing treatment. By increasing the amount of carburizing gas and decreasing the amount of carburizing gas toward the end, the generation of soot can be suppressed, and it is possible to process objects to be processed under different processing conditions in parallel. And so on.
【００２３】また、第二発明によれば、第一発明の構成
に加えて、前記処理室の加熱が誘導加熱である構成とし
てある。このため、加熱時間が、例えば約１０分間から
１分間に短縮でき、装置を小型化できるという効果を奏
する。According to a second aspect of the present invention, in addition to the configuration of the first aspect, the processing chamber is heated by induction heating. For this reason, the heating time can be reduced from, for example, about 10 minutes to 1 minute, and an effect that the apparatus can be downsized can be obtained.
【図面の簡単な説明】[Brief description of the drawings]
【図１】 本発明に係る間欠駆動式真空浸炭炉の水平方
向の概略断面を示す図である。FIG. 1 is a view schematically showing a horizontal cross section of an intermittently driven vacuum carburizing furnace according to the present invention.
【図２】 図１に示す間欠駆動式真空浸炭炉の回転炉床
が下降した場合における垂直方向の概略断面を示す図で
ある。FIG. 2 is a view schematically showing a vertical cross section when the rotary hearth of the intermittently driven vacuum carburizing furnace shown in FIG. 1 is lowered.
【図３】 図１に示す間欠駆動式真空浸炭炉の回転炉床
が上昇した場合における垂直方向の概略断面を示す図で
ある。3 is a diagram showing a schematic cross section in the vertical direction when the rotary hearth of the intermittently driven vacuum carburizing furnace shown in FIG. 1 is raised.
【図４】 図１に示す間欠駆動式真空浸炭炉の抽出室の
垂直方向の概略断面を示す図である。4 is a diagram showing a schematic vertical cross section of an extraction chamber of the intermittently driven vacuum carburizing furnace shown in FIG.
【図５】 浸炭部の結晶粒微細化をしない場合における
被処理物の雰囲気の状態変化を示す図である。FIG. 5 is a diagram showing a change in the state of the atmosphere of the object to be treated when the crystal grains in the carburized portion are not refined.
【図６】 浸炭部の結晶粒微細化をする場合における被
処理物の雰囲気の状態変化を示す図である。FIG. 6 is a diagram showing a change in the state of the atmosphere of the object to be treated when the grain size of the carburized portion is reduced.
１ 炉本体 ２ 回転炉床 ３ 駆動部 ４ 装入室 ５ 抽出室 １１ 密閉空間 １２ 処理室 １３Ａ，１３Ｂ
保熱板 １４ 加熱手段 １５ ヒータ １６Ａ，１６Ｂ 中間ガイドレール １７ 第一抽出プ
ッシャ １８Ａ，１８Ｂ 中間扉 ２１ 軸 ２２ 円形テーブル ２３ 蓋体 ２４ 支持部 ３１ 昇降テーブ
ル装置 ３２ モータ ３３ 歯車機構 ４１ 装入扉 ４２Ａ 装入ガイ
ドレール ４２Ｂ 抽出ガイドレール ４３ 装入プッシ
ャ ５１ 抽出扉 ５２ 焼入れ槽 ５３ 昇降手段 ５４ 第二抽出プ
ッシャ Ｔ 間欠駆動式真空浸炭炉 Ｗ 被処理物DESCRIPTION OF SYMBOLS 1 Furnace main body 2 Rotary hearth 3 Drive part 4 Charging room 5 Extraction room 11 Sealed space 12 Processing room 13A, 13B
Heat retaining plate 14 Heating means 15 Heater 16A, 16B Intermediate guide rail 17 First extraction pusher 18A, 18B Intermediate door 21 Shaft 22 Circular table 23 Lid 24 Support section 31 Elevating table device 32 Motor 33 Gear mechanism 41 Loading door 42A Inlet guide rail 42B Extraction guide rail 43 Charging pusher 51 Extraction door 52 Quenching tank 53 Elevating means 54 Second extraction pusher T Intermittently driven vacuum carburizing furnace W Workpiece
Claims (2)
もに、この密閉空間内に下部開口を有する複数の処理室
を同一円に沿って等間隔で配設することにより処理ステ
ーションを形成し、この処理ステーション毎に前記処理
室を加熱或は冷却或は真空排気或は所望ガスの供給の少
なくともいずれかが可能に形成した円形の炉本体と、こ
の炉本体内に昇降可能かつ回転可能に設けられ、被処理
物を載置させる支持部を有し、前記処理室の下部開口を
閉じる蓋体を前記処理室に対向して備えた回転炉床と、
この回転炉床を昇降させ、所望角度ずつ間欠的に回転さ
せる駆動部と、前記炉本体に設けられ、被処理物を前記
支持部に送出す装入室と、この装入室に近接して前記炉
本体に設けられ、被処理物を焼入れ処理する抽出室とか
らなることを特徴とする間欠駆動式真空浸炭炉。1. A processing station is formed by forming a sealed space capable of evacuating and arranging a plurality of processing chambers having a lower opening in the sealed space at equal intervals along the same circle. A circular furnace main body formed so as to be capable of heating, cooling, evacuating, or supplying a desired gas for each processing station; and a vertically movable and rotatably provided in the furnace main body. A rotary hearth having a support portion on which the object is placed, and a lid closing the lower opening of the processing chamber facing the processing chamber;
A drive unit that raises and lowers this rotary hearth and rotates it intermittently by a desired angle, a charging chamber that is provided in the furnace main body, and sends out an object to be processed to the support unit, An intermittently driven vacuum carburizing furnace, comprising: an extraction chamber provided in the furnace main body and quenching an object to be processed.
を特徴とする請求項１に記載の間欠駆動式真空浸炭炉。2. The intermittently driven vacuum carburizing furnace according to claim 1, wherein the heating of the processing chamber is induction heating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000029033A JP4537522B2 (en) | 2000-02-07 | 2000-02-07 | Intermittently driven vacuum carburizing furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000029033A JP4537522B2 (en) | 2000-02-07 | 2000-02-07 | Intermittently driven vacuum carburizing furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001220659A true JP2001220659A (en) | 2001-08-14 |
| JP4537522B2 JP4537522B2 (en) | 2010-09-01 |
Family
ID=18554356
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000029033A Expired - Fee Related JP4537522B2 (en) | 2000-02-07 | 2000-02-07 | Intermittently driven vacuum carburizing furnace |
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| Country | Link |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006021984A1 (en) * | 2004-08-23 | 2006-03-02 | Koyo Thermo Systems Co., Ltd. | Carburizing equipment and carburizing method |
| WO2016017354A1 (en) * | 2014-07-28 | 2016-02-04 | 株式会社Ihi | Conveyance device for heat treatment device and heat treatment device |
| US9989959B2 (en) | 2015-03-10 | 2018-06-05 | Toyota Jidosha Kabushiki Kaisha | Workpiece processing system for carrying out sequential execution of process of workpiece in each process chamber by setting start time of process in each process chamber based on necessary processing duration specific to each chamber and necessary conveyance duration between the chambers |
| CN113652631A (en) * | 2021-08-29 | 2021-11-16 | 梁能舟 | Box type gas carburizing furnace for metal heat treatment |
| CN114508929A (en) * | 2022-02-14 | 2022-05-17 | 李正义 | Three-dimensional element vibrating powder sintering apparatus and sintering method |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5214312U (en) * | 1975-07-18 | 1977-02-01 | ||
| JPS58130270A (en) * | 1982-01-27 | 1983-08-03 | Michio Sugiyama | Continuous vacuum carburizing furnace and its operation method |
| JPS59150082A (en) * | 1983-02-11 | 1984-08-28 | Toyota Motor Corp | Treatment for surface chilling of steel |
| JPS62290858A (en) * | 1986-06-11 | 1987-12-17 | Sumitomo Heavy Ind Ltd | Heat treating furnace |
| JPH0250080A (en) * | 1988-05-31 | 1990-02-20 | Fuaanesu Juko Kk | Furnace |
| JPH02275289A (en) * | 1989-03-17 | 1990-11-09 | Etud & Constr Mecaniques Sa | Continuous heat treating device in vacuum |
| JPH06136509A (en) * | 1992-10-27 | 1994-05-17 | Daido Steel Co Ltd | Plasma carburizing furnace |
| JPH0711326A (en) * | 1994-04-28 | 1995-01-13 | Daido Steel Co Ltd | Vacuum heat treatment method |
| JPH08285462A (en) * | 1995-03-31 | 1996-11-01 | Ipsen Ind Internatl Gmbh | Thermally treating device for metallic work under vacuum |
| JPH1053809A (en) * | 1996-06-06 | 1998-02-24 | Dowa Mining Co Ltd | Carburize quenching and tempering method and device thereof |
-
2000
- 2000-02-07 JP JP2000029033A patent/JP4537522B2/en not_active Expired - Fee Related
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5214312U (en) * | 1975-07-18 | 1977-02-01 | ||
| JPS58130270A (en) * | 1982-01-27 | 1983-08-03 | Michio Sugiyama | Continuous vacuum carburizing furnace and its operation method |
| JPS59150082A (en) * | 1983-02-11 | 1984-08-28 | Toyota Motor Corp | Treatment for surface chilling of steel |
| JPS62290858A (en) * | 1986-06-11 | 1987-12-17 | Sumitomo Heavy Ind Ltd | Heat treating furnace |
| JPH0250080A (en) * | 1988-05-31 | 1990-02-20 | Fuaanesu Juko Kk | Furnace |
| JPH02275289A (en) * | 1989-03-17 | 1990-11-09 | Etud & Constr Mecaniques Sa | Continuous heat treating device in vacuum |
| JPH06136509A (en) * | 1992-10-27 | 1994-05-17 | Daido Steel Co Ltd | Plasma carburizing furnace |
| JPH0711326A (en) * | 1994-04-28 | 1995-01-13 | Daido Steel Co Ltd | Vacuum heat treatment method |
| JPH08285462A (en) * | 1995-03-31 | 1996-11-01 | Ipsen Ind Internatl Gmbh | Thermally treating device for metallic work under vacuum |
| JPH1053809A (en) * | 1996-06-06 | 1998-02-24 | Dowa Mining Co Ltd | Carburize quenching and tempering method and device thereof |
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