JP4325756B2 - How to use small vacuum carburizing furnace - Google Patents

How to use small vacuum carburizing furnace Download PDF

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JP4325756B2
JP4325756B2 JP2005321043A JP2005321043A JP4325756B2 JP 4325756 B2 JP4325756 B2 JP 4325756B2 JP 2005321043 A JP2005321043 A JP 2005321043A JP 2005321043 A JP2005321043 A JP 2005321043A JP 4325756 B2 JP4325756 B2 JP 4325756B2
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heating chamber
cooling chamber
chamber
cooling
vacuum carburizing
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亮 高堂
昇 宮腰
良行 岩上
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Nachi Fujikoshi Corp
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Description

本発明は、入口扉と冷却室と加熱室を有し、冷却室と加熱室を中間扉で仕切った比較的浸炭処理量が少量のバッチ型小形真空浸炭炉使用方法に関する。 The present invention relates to a method for using a batch type small vacuum carburizing furnace having an entrance door, a cooling chamber, and a heating chamber, and having a relatively small amount of carburizing treatment in which the cooling chamber and the heating chamber are partitioned by an intermediate door.

従来の入口扉と冷却室と加熱室を有し、冷却室と加熱室を中間扉で仕切ったバッチ型真空浸炭炉は、例えば特許文献１、２に記載されている例がある。真空浸炭炉でないが、特許文献３では、キュポラを２分割した、炉のメンテナンス用点検窓を提案している。
特公昭62-4464 号公報 特許第2963869 号公報 特開2002-31482号公報 Conventional batch-type vacuum carburizing furnaces having an entrance door, a cooling chamber, and a heating chamber and partitioning the cooling chamber and the heating chamber by an intermediate door are disclosed in Patent Documents 1 and 2, for example. Although it is not a vacuum carburizing furnace, Patent Document 3 proposes an inspection window for furnace maintenance in which a cupola is divided into two.
Japanese Patent Publication No.62-4464 Japanese Patent No. 2963869 JP 2002-31482 A

真空浸炭炉をはじめとする熱処理炉は一般の機械と異なり高温状態で運転されるため、熱変形・材料の劣化、脆化等の発生が考えられる。そのため突発故障の回避を目的で定期的なメンテナンスが必要である。例えば、時間経過と共に断熱材の劣化や真空浸炭は断熱材内部に煤や炭化水素系ガスの重合物が蓄積し断熱効果が悪くなってきたときは断熱材の交換が必要となる。中間扉は真空シール用Ｏリングにより真空シールされているが、減圧高温下では真空シール用Ｏリングの寿命は通常の常温大気圧下より短い。そのため定期的に中間扉の真空シール用Ｏリングは交換が必要となる。その他機械部品も比較的高温にさらされるため、劣化・変形・破損が考えられる。例えば１バッチの処理量が100 〜200Kg といった、比較的浸炭処理量が少量の場合炉体が小さく炉内に人が入れても十分なメンテナンス作業ができるスペースがない。メンテナンス性を上げるため炉体を大きくすれば処理量に対して浸炭ガスや復圧時の窒素ガスが必要以上に多くいることと減圧のための真空ポンプが大きいものが必要になり経済的な損失が大きい。特許文献１、２に記載された真空浸炭炉では、加熱室内の断熱材交換および中間扉の真空シール用Ｏリング、その他機械部品の交換を含むメンテナンス時は装置を大部分分解して行う必要がある。特許文献３では、キュポラを２分割した、炉のメンテナンス用の大きい点検窓を提案しているが、鋳鉄の溶解用キュポラ用であり、本発明のような真空減圧下で操業される真空浸炭炉には適用できない。   Unlike ordinary machines, heat treatment furnaces such as vacuum carburizing furnaces are operated at a high temperature, so that thermal deformation, material deterioration, embrittlement, etc. may occur. Therefore, regular maintenance is necessary to avoid sudden failures. For example, deterioration of a heat insulating material and vacuum carburizing over time will require replacement of the heat insulating material when soot and hydrocarbon gas polymer accumulate inside the heat insulating material and the heat insulating effect deteriorates. The intermediate door is vacuum-sealed by a vacuum sealing O-ring, but the life of the vacuum sealing O-ring is shorter than that at normal room temperature and atmospheric pressure at high temperature under reduced pressure. Therefore, the O-ring for vacuum sealing of the intermediate door needs to be replaced periodically. Other machine parts are also exposed to relatively high temperatures, and may be deteriorated, deformed, or damaged. For example, when the amount of carburizing treatment is relatively small, for example, when the batch processing amount is 100 to 200 kg, the furnace body is small and there is no space for sufficient maintenance work even if a person enters the furnace. If the furnace body is enlarged to improve maintainability, the amount of carburizing gas and nitrogen gas at the time of decompression will be larger than necessary, and a large vacuum pump for decompression will be required. Is big. In the vacuum carburizing furnaces described in Patent Documents 1 and 2, it is necessary to disassemble the apparatus mostly during maintenance including replacement of the heat insulating material in the heating chamber and replacement of the vacuum seal O-ring of the intermediate door and other mechanical parts. is there. Patent Document 3 proposes a large inspection window for furnace maintenance that divides the cupola into two parts, but is used for a cupola for melting cast iron and is operated under vacuum decompression as in the present invention. Not applicable to

本発明の課題は、入口扉と冷却室と加熱室を有し、冷却室と加熱室を中間扉で仕切った比較的浸炭処理量が少量のバッチ型小形真空浸炭炉において、加熱室内の断熱材交換および中間扉の真空シール用Ｏリング、その他機械部品の交換を含むメンテナンス時において、装置の大きな分解作業を不要とした小形真空浸炭炉を提供することにある。 An object of the present invention is to provide a heat insulating material in a heating chamber in a batch type small vacuum carburizing furnace having an entrance door, a cooling chamber, and a heating chamber and having a relatively small amount of carburizing treatment in which the cooling chamber and the heating chamber are partitioned by an intermediate door. An object of the present invention is to provide a small vacuum carburizing furnace that does not require a large disassembly work of the apparatus during maintenance including replacement and O-ring for vacuum sealing of an intermediate door and other mechanical parts.

このため本発明によると、入口扉と冷却室と加熱室を有し、冷却室と加熱室を中間扉で仕切った比較的浸炭処理量が少量のバッチ型小形真空浸炭炉において、
冷却室出口フランジと加熱室入口フランジとをボルトで当接して前記冷却室と加熱室とが接続するようにし、ヒンジを含む開閉手段を介して前記冷却室と加熱室とを連結し、前記冷却室出口フランジと加熱室入口フランジとのボルトによる当接を解くことにより互いに開閉可能とし、
かつ昇降可能な中間扉を、前記冷却室出口フランジにボルトで当接した前記加熱室入口フランジに取り付けたことを特徴とする小型真空浸炭炉使用方法によって上記本発明の課題を解決した。 For this reason, according to the present invention, in a batch type small vacuum carburizing furnace having an entrance door, a cooling chamber, and a heating chamber, and having a relatively small amount of carburizing treatment in which the cooling chamber and the heating chamber are partitioned by an intermediate door,
The cooling chamber outlet flange and the heating chamber inlet flange are brought into contact with a bolt so that the cooling chamber and the heating chamber are connected, and the cooling chamber and the heating chamber are connected via an opening / closing means including a hinge, It is possible to open and close each other by releasing the contact between the cooling chamber outlet flange and the heating chamber inlet flange with the bolt ,
And a vertically movable intermediate doors, solves the problem of the present invention by a small vacuum carburizing furnace used method being characterized in that attached to the heating chamber inlet flange abut with bolts to the cooling chamber outlet flange.

本発明では、入口扉と冷却室と加熱室を有し、冷却室と加熱室を中間扉で仕切った比較的浸炭処理量が少量のバッチ型小形真空浸炭炉において、
冷却室出口フランジと加熱室入口フランジとをボルトで当接して前記冷却室と加熱室とが接続するようにし、ヒンジを含む開閉手段を介して前記冷却室と加熱室とを連結し、前記冷却室出口フランジと加熱室入口フランジとのボルトによる当接を解くことにより互いに開閉可能とし、
かつ昇降可能な中間扉を、前記冷却室出口フランジにボルトで当接した前記加熱室入口フランジに取り付けたことを特徴とする小型真空浸炭炉使用方法としたので、
比較的浸炭処理量が少量のバッチ型小形真空浸炭炉において、加熱室内の断熱材交換および中間扉の真空シール用Ｏリング、その他機械部品の交換を含むメンテナンス時において、装置の大きな分解作業を不要とした小形真空浸炭炉を提供するものとなった。 In the present invention, in a batch type small vacuum carburizing furnace having an entrance door, a cooling chamber, and a heating chamber, and having a relatively small amount of carburizing treatment in which the cooling chamber and the heating chamber are partitioned by an intermediate door,
The cooling chamber outlet flange and the heating chamber inlet flange are brought into contact with a bolt so that the cooling chamber and the heating chamber are connected, and the cooling chamber and the heating chamber are connected via an opening / closing means including a hinge, It is possible to open and close each other by releasing the contact between the cooling chamber outlet flange and the heating chamber inlet flange with the bolt ,
And a vertically movable intermediate doors, since a small vacuum carburizing furnace used method being characterized in that attached to the heating chamber inlet flange abut with bolts to the cooling chamber outlet flange,
In a batch type small vacuum carburizing furnace with a relatively small carburizing amount, no major disassembly work is required for maintenance, including heat insulation replacement in the heating chamber, O-ring for vacuum sealing of the intermediate door, and other mechanical parts. It became a small vacuum carburizing furnace.

好ましくは、前記中間扉の昇降駆動手段は前記冷却室内部へ取り込んだ外接歯車の噛み合わせにより行うようにし、前記加熱室を開く時は前記外接歯車の噛み合わせが外れるようにしたことにより、加熱室を開く時は外接歯車の噛み合わせが外れるだけでそれ以上の分解作業を不要とした。
さらに好ましくは、前記加熱室は取外し可能な後部蓋体を有し、前記後部蓋体を取外すことにより、断熱枠に取付けられた断熱材を前記加熱室後部から取出し可能にした。 Preferably, the raising / lowering driving means of the intermediate door is performed by meshing of the external gear incorporated into the cooling chamber, and when the heating chamber is opened, the mesh of the external gear is disengaged. When the chamber is opened, the disengagement of the external gear is disengaged and no further disassembly work is required.
More preferably, the heating chamber has a removable rear cover, and the heat insulating material attached to the heat insulating frame can be taken out from the rear of the heating chamber by removing the rear cover .

本発明を実施するための最良の形態の一例を図１乃至図５を参照して説明する。図１は本発明の実施形態の小形真空浸炭炉の概略側面断面図、図２は図１のＡ−Ａ線に沿った概略平面断面図、図３は図２の中間扉と加熱室との真空シール詳細部分の部分拡大図、図４は図２の加熱室がヒンジを介して冷却室に対して開いた状態を示す概略図、図５は図２の加熱室の後部蓋体を分解して断熱枠に取付けられた断熱材を取出した状態を示す概略図、をそれぞれ示す。   An example of the best mode for carrying out the present invention will be described with reference to FIGS. 1 is a schematic side cross-sectional view of a small vacuum carburizing furnace according to an embodiment of the present invention, FIG. 2 is a schematic plan cross-sectional view taken along line AA in FIG. 1, and FIG. FIG. 4 is a partial enlarged view of a vacuum seal detail portion, FIG. 4 is a schematic view showing a state in which the heating chamber of FIG. 2 is opened with respect to the cooling chamber via a hinge, and FIG. The schematic which shows the state which took out the heat insulating material attached to the heat insulation frame is shown, respectively.

本発明の実施形態の小形真空浸炭炉は、図１の左方から入口扉１と冷却室２と加熱室３を有し、冷却室２と加熱室３を中間扉４で仕切った比較的浸炭処理量が少量のバッチ型小形真空浸炭炉である。本発明では、冷却室出口フランジ33と加熱室入口フランジ６とをボルト28（図３）で連結して、冷却室２と加熱室３とを連結し、ヒンジ５を含む開閉手段を介して冷却室２と加熱室３と連結し、冷却室出口フランジ33と加熱室入口フランジ６との連結を解くことにより互いに開閉可能とし、かつ昇降可能な中間扉４を、冷却室出口フランジ33に連結した加熱室入口フランジ６にシーリングプレート29を介してボルト31で取り付けた。冷却室２内には被処理物８の炉内搬送装置30（図２）と、被処理物８を油９中に浸漬させる昇降装置７（図１）が設けられる。冷却室２と加熱室３の間の中間扉４は、シーリングプレート29を介して加熱室３を真空シールするエンドレスチェーン17の昇降駆動により開閉可能にされている。加熱室３内には、ヒータ22と、ヒータ22を囲む図示しない断熱枠で支えられた断熱材11が配置されている。加熱室後部は後部蓋体12により外部と遮断されている。図２に示すように、冷却室炉体と加熱室炉体とはアーム 20、21とヒンジ５を含む開閉手段で連結され、冷却室２と加熱室３とを締結しているボルト28（図３）を緩めることにより加熱室３はヒンジ５を中心に開くことができる（図４の状態）。   A small vacuum carburizing furnace according to an embodiment of the present invention has an inlet door 1, a cooling chamber 2, and a heating chamber 3 from the left in FIG. 1, and is relatively carburized by dividing the cooling chamber 2 and the heating chamber 3 by an intermediate door 4. It is a batch type small vacuum carburizing furnace with a small amount of processing. In the present invention, the cooling chamber outlet flange 33 and the heating chamber inlet flange 6 are connected by a bolt 28 (FIG. 3), the cooling chamber 2 and the heating chamber 3 are connected, and cooling is performed via an opening / closing means including a hinge 5. The intermediate door 4 is connected to the cooling chamber outlet flange 33 by being connected to the chamber 2 and the heating chamber 3 and opening and closing each other by releasing the connection between the cooling chamber outlet flange 33 and the heating chamber inlet flange 6. A bolt 31 was attached to the heating chamber inlet flange 6 via a sealing plate 29. In the cooling chamber 2, an in-furnace transfer device 30 (FIG. 2) for the workpiece 8 and an elevating device 7 (FIG. 1) for immersing the workpiece 8 in the oil 9 are provided. The intermediate door 4 between the cooling chamber 2 and the heating chamber 3 can be opened and closed by raising and lowering an endless chain 17 that vacuum seals the heating chamber 3 via a sealing plate 29. In the heating chamber 3, a heater 22 and a heat insulating material 11 supported by a heat insulating frame (not shown) surrounding the heater 22 are arranged. The rear part of the heating chamber is shut off from the outside by the rear lid 12. As shown in FIG. 2, the cooling chamber furnace body and the heating chamber furnace body are connected by opening / closing means including arms 20 and 21 and a hinge 5, and a bolt 28 (FIG. 2) that fastens the cooling chamber 2 and the heating chamber 3. By loosening 3), the heating chamber 3 can be opened around the hinge 5 (state of FIG. 4).

図３に示す図２の中間扉と加熱室との真空シール詳細部分の部分拡大図でみてわかるように、中間扉４は、冷却室外部に設けられた昇降駆動手段13から冷却室内部に伸びる外接歯車 14、15を介してエンドレスチェーン17により上下し、下降端では、リンク装置 18、19によりシーリングプレート29を介して加熱室側に押し付けられる。エンドレスチェーン17は被処理物８の流れ方向中心の両側に各１基あり、エンドレスチェーン17のチェーンホイール16の支承軸26は、アングル部材27により、加熱室フランジ６に取り付けられている。冷却室２に貼り付けられる加熱室フランジ６は、水冷ジャケット25を有し、シーリングプレート29は、真空シール用Ｏリング溝に入れられた真空シール用Ｏリング23、及び水冷ジャケットシール溝に入れられた水冷ジャケットシール 24、24をそれぞれ有し、水冷ジャケット25により冷却されている。   As can be seen from the partial enlarged view of the vacuum seal detail portion of the intermediate door and the heating chamber shown in FIG. 2 shown in FIG. 3, the intermediate door 4 extends from the elevating drive means 13 provided outside the cooling chamber to the inside of the cooling chamber. It is moved up and down by the endless chain 17 via the external gears 14 and 15, and is pressed against the heating chamber side via the sealing plate 29 by the link devices 18 and 19 at the descending end. One endless chain 17 is provided on each side of the center of the workpiece 8 in the flow direction, and the support shaft 26 of the chain wheel 16 of the endless chain 17 is attached to the heating chamber flange 6 by an angle member 27. The heating chamber flange 6 attached to the cooling chamber 2 has a water cooling jacket 25, and the sealing plate 29 is inserted into the vacuum sealing O ring 23 and the water cooling jacket sealing groove. Water-cooled jacket seals 24 and 24 are provided, respectively, and are cooled by a water-cooled jacket 25.

作動において、真空シール用Ｏリング23は中間扉４の開閉毎につぶされ元に戻るサイクルを繰り返す。加熱室フランジ６は水冷ジャケット25で冷却されているため、熱による、シーリングプレート29に設けた真空シール用Ｏリング23の劣化は回避できるが、真空シール用Ｏリング23の弾力性は時間経過と共に劣化する。このため真空シール用Ｏリング23は定期交換する必要があるが、特許文献１、２に記載された真空浸炭炉では、加熱室が冷却室と一体構造であり、炉体が小さく入口が小さいため、人が炉内へ入ることが難しく、交換する際は加熱室を分解して冷却室から切り離した状態で行う必要があった。   In operation, the vacuum seal O-ring 23 is repeatedly crushed every time the intermediate door 4 is opened and closed. Since the heating chamber flange 6 is cooled by the water cooling jacket 25, deterioration of the vacuum seal O-ring 23 provided on the sealing plate 29 due to heat can be avoided. However, the elasticity of the vacuum seal O-ring 23 increases with time. to degrade. For this reason, it is necessary to periodically replace the O-ring 23 for vacuum sealing. However, in the vacuum carburizing furnace described in Patent Documents 1 and 2, the heating chamber is integrated with the cooling chamber, the furnace body is small, and the inlet is small. It was difficult for humans to enter the furnace, and it was necessary to disassemble the heating chamber and separate it from the cooling chamber when replacing it.

本発明では、冷却室出口フランジ33と加熱室入口フランジ６とをボルト28（図３）で連結して、冷却室２と加熱室３とを連結し、ヒンジ５を含む開閉手段を介して冷却室２と加熱室３と連結し、冷却室出口フランジ33と加熱室入口フランジ６との連結を解くことにより互いに開閉可能とし、かつ昇降可能な中間扉４を、冷却室出口フランジ33に連結した加熱室入口フランジ６にシーリングプレート29を介してボルト31で取り付けたので、冷却室出口フランジ33と加熱室入口フランジ６とを締結しているボルト28（図３）を緩め加熱室を90°以上開き（図４の状態）、ボルト31（図３）を緩めシーリングプレート29を加熱室入口フランジ６から取り外し、真空シール用Ｏリング23等の交換を行う。本発明では、入口扉と冷却室と加熱室を有し、冷却室と加熱室を中間扉で仕切った比較的浸炭処理量が少量のバッチ型小形真空浸炭炉において、加熱室内の断熱材交換および中間扉の真空シール用Ｏリング23、その他機械部品の交換を含むメンテナンス時において、装置の大きな分解作業を不要とした小形真空浸炭炉を提供するものとなった。中間扉４の上下駆動は、冷却室外部の駆動手段13から外接歯車 14、15により行うので加熱室を開くときは、外接歯車 14、15の噛み合わせが外れるようにしたので、加熱室３、中間扉４を分解作業をする必要がない。図４の状態からもとの位置への復元も、アーム 20、21とヒンジ手段の強度を十分持たせたものにすれば問題はない。中間扉を駆動するためのエンドレスチェーン17とスプロケット16、軸受類および各部品は比較的高温にさらされるため、劣化、変形、破損が考えられ定期点検、定期交換が必要である。特許文献１、２に記載された真空浸炭炉では、前述の真空シール用Ｏリング23交換と同様、炉内へ入っての作業は困難なため加熱室を冷却室と分離した状態で行う必要があったが、本発明では、図４の状態では冷却室の加熱室側は開放状態のため、冷却室外部から中の点検、修理が可能である。
図５は断熱材の交換を示した図であり、加熱室後部蓋体12は取外し可能にされ、後部蓋体12を外し、加熱室後部から断熱材11を図示しない断熱枠と同時に炉外へ取出し交換し、その後復元した状態を示す。 In the present invention, the cooling chamber outlet flange 33 and the heating chamber inlet flange 6 are connected by a bolt 28 (FIG. 3), the cooling chamber 2 and the heating chamber 3 are connected, and cooling is performed via an opening / closing means including a hinge 5. The intermediate door 4 is connected to the cooling chamber outlet flange 33 by being connected to the chamber 2 and the heating chamber 3 and opening and closing each other by releasing the connection between the cooling chamber outlet flange 33 and the heating chamber inlet flange 6. Since the bolt 31 is attached to the heating chamber inlet flange 6 via the sealing plate 29, the bolt 28 (FIG. 3) that fastens the cooling chamber outlet flange 33 and the heating chamber inlet flange 6 is loosened to make the heating chamber 90 ° or more. Open (state of FIG. 4), loosen the bolt 31 (FIG. 3), remove the sealing plate 29 from the heating chamber inlet flange 6, and replace the vacuum seal O-ring 23 and the like. In the present invention, in a batch type small vacuum carburizing furnace having an entrance door, a cooling chamber, and a heating chamber, and having a relatively small amount of carburizing treatment in which the cooling chamber and the heating chamber are partitioned by an intermediate door, It became possible to provide a small vacuum carburizing furnace that does not require a large disassembly work of the apparatus during maintenance including replacement of the O-ring 23 for vacuum sealing of the intermediate door and other machine parts. Since the intermediate door 4 is driven up and down by the external gears 14 and 15 from the driving means 13 outside the cooling chamber, when the heating chamber is opened, the external gears 14 and 15 are disengaged. There is no need to disassemble the intermediate door 4. The restoration from the state of FIG. 4 to the original position is not a problem if the arms 20, 21 and the hinge means are sufficiently strong. Since the endless chain 17 and the sprocket 16 for driving the intermediate door, the sprockets 16 and the bearings and each component are exposed to a relatively high temperature, they may be deteriorated, deformed, or damaged, and require periodic inspection and replacement. In the vacuum carburizing furnaces described in Patent Documents 1 and 2, as in the case of exchanging the O-ring 23 for vacuum sealing as described above, it is difficult to enter the furnace, so the heating chamber must be separated from the cooling chamber. However, in the present invention, since the heating chamber side of the cooling chamber is open in the state of FIG. 4, the inside can be inspected and repaired from the outside of the cooling chamber.
FIG. 5 is a view showing the replacement of the heat insulating material. The heating chamber rear cover 12 is made removable, the rear cover 12 is removed, and the heat insulating material 11 is moved from the rear of the heating chamber to the outside of the furnace simultaneously with the heat insulating frame (not shown). Shows the state after removal and replacement.

本発明の実施形態の小形真空浸炭炉の概略側面断面図。1 is a schematic side sectional view of a small vacuum carburizing furnace according to an embodiment of the present invention. 図２は図１のＡ−Ａ線に沿った概略平面断面図。FIG. 2 is a schematic plan sectional view taken along the line AA of FIG. 図２の中間扉と加熱室との真空シール詳細部分の部分拡大図。The elements on larger scale of the vacuum seal detailed part of the intermediate door and heating chamber of FIG. 図２の加熱室がアーム 20、21とヒンジ５を介して冷却室に対して開いた状態を示す概略図。FIG. 3 is a schematic view showing a state in which the heating chamber of FIG. 図２の加熱室の後部蓋体を分解して断熱枠に取付けられた断熱材を取出した状態を示す概略図。Schematic which shows the state which decomposed | disassembled the rear cover body of the heating chamber of FIG. 2, and took out the heat insulating material attached to the heat insulation frame.

１：入口扉、２：冷却室、３：加熱室、４：中間扉
５：ヒンジ（開閉手段）、６：加熱室入口フランジ、33：冷却室出口フランジ 1: Inlet door, 2: Cooling chamber, 3: Heating chamber, 4: Intermediate door 5: Hinge (opening / closing means), 6: Heating chamber inlet flange, 33: Cooling chamber outlet flange

Claims (3)

入口扉と冷却室と加熱室を有し、冷却室と加熱室を中間扉で仕切った比較的浸炭処理量が少量のバッチ型小形真空浸炭炉において、
冷却室出口フランジと加熱室入口フランジとをボルトで当接して前記冷却室と加熱室とが接続するようにし、ヒンジを含む開閉手段を介して前記冷却室と加熱室とを連結し、前記冷却室出口フランジと加熱室入口フランジとのボルトによる当接を解くことにより互いに開閉可能とし、
かつ昇降可能な中間扉を、前記冷却室出口フランジにボルトで当接した前記加熱室入口フランジに取り付けたことを特徴とする小型真空浸炭炉使用方法。 In a batch type small vacuum carburizing furnace that has an entrance door, a cooling chamber, and a heating chamber, and the cooling chamber and the heating chamber are partitioned by an intermediate door and the amount of carburizing treatment is relatively small.
The cooling chamber outlet flange and the heating chamber inlet flange are brought into contact with a bolt so that the cooling chamber and the heating chamber are connected, and the cooling chamber and the heating chamber are connected via an opening / closing means including a hinge, It is possible to open and close each other by releasing the contact between the cooling chamber outlet flange and the heating chamber inlet flange with the bolt ,
And a vertically movable intermediate door, the cooling chamber small vacuum carburizing furnace used method characterized by a bolt to the outlet flange attached to the contact with said heating chamber inlet flange. 前記中間扉の昇降駆動手段は前記冷却室内部へ取り込んだ外接歯車の噛み合わせにより行うようにし、前記加熱室を開く時は前記外接歯車の噛み合わせが外れるようにしたことを特徴とする請求項１記載の小形真空浸炭炉使用方法。 The moving mechanism for raising and lowering the intermediate door is formed by meshing with an external gear incorporated in the cooling chamber, and the meshing of the external gear is disengaged when the heating chamber is opened. A method for using the small vacuum carburizing furnace according to 1. 前記加熱室は取外し可能な後部蓋体を有し、前記後部蓋体を取外すことにより断熱枠に取付けられた断熱材を前記加熱室後部から取出し可能にされたことを特徴とする請求項１又は請求項２記載の小形真空浸炭炉使用方法。 The heating chamber has a removable rear lid, and the thermal insulation attached to the thermal insulation frame can be taken out from the rear of the heating chamber by removing the rear lid. A method of using the small vacuum carburizing furnace according to claim 2.
JP2005321043A 2005-11-04 2005-11-04 How to use small vacuum carburizing furnace Expired - Fee Related JP4325756B2 (en)

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