JP2008170116A - Heat treating facility - Google Patents

Heat treating facility Download PDF

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JP2008170116A
JP2008170116A JP2007005411A JP2007005411A JP2008170116A JP 2008170116 A JP2008170116 A JP 2008170116A JP 2007005411 A JP2007005411 A JP 2007005411A JP 2007005411 A JP2007005411 A JP 2007005411A JP 2008170116 A JP2008170116 A JP 2008170116A
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chamber
heat treatment
heat
delivery
processed
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JP5167640B2 (en
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Satoru Hori
堀  哲
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Daido Steel Co Ltd
大同特殊鋼株式会社
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Abstract

<P>PROBLEM TO BE SOLVED: To efficiently perform heat treatment of articles to be treated, and to meet various requests of heat patterns. <P>SOLUTION: This heat treating facility comprises a plurality of batch type heat treating chambers 2a-2c and a conveying unit 3. Each batch type heat treating chamber is provided with a heater 13 for heating the treated article W. The conveying unit is provided to be travelable on rails 1, 1 by supporting a heat insulating chamber 20 and a delivery chamber 21 on a truck 23. The delivery chamber is provided with a delivery mechanism 52 delivering the treated article to and from the batch type heat treating chamber and the heat insulating chamber. The heat insulting chamber is provided with a heater 28 for keeping the treated article warm, and gas cooling means 38, 38 for cooling the treated article by forcibly circulating gas in a furnace. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、バッチ式炉でありながらも生産性が良好で、しかも多様なヒートパターンで金属を浸炭,焼入れ等、熱処理することができる熱処理設備に関するものである。   The present invention relates to a heat treatment facility that is a batch furnace, has good productivity, and can perform heat treatment such as carburizing and quenching of metals with various heat patterns.
一般にバッチ式炉は、連続式炉と比較して生産性が劣るために、本出願人の特許出願に係る下記特許文献1に示された熱処理設備では、保温チャンバが搭載された搬送ユニットによって処理品を搬送し、該処理品を処理チャンバに受け渡しできるように構成し、これによって、多品種少量生産に適し、バッチ式炉でありながら連続式炉と同等の生産性ないし熱効率が達成可能であると同時に、連続式炉には不可能であった間引き操業、部分保守を可能にするなど、バッチ式の長所を併せ持つ熱処理設備を具現するものであった。
特開2006−63363号公報
In general, batch-type furnaces are inferior in productivity as compared with continuous furnaces. Therefore, in the heat treatment equipment shown in the following Patent Document 1 relating to the applicant's patent application, the batch furnace is processed by a transfer unit equipped with a heat insulation chamber. The product can be transported and the processed product can be delivered to the processing chamber. This makes it suitable for high-mix low-volume production and can achieve productivity or thermal efficiency equivalent to that of a continuous furnace while being a batch furnace. At the same time, it realized a heat treatment facility that had batch-type advantages, such as thinning operation and partial maintenance that were impossible with a continuous furnace.
JP 2006-63363 A
ところで、処理品の強度を従来の浸炭処理品と比較して向上させるために、加熱(浸炭)後に一旦冷却し、その後再加熱するような2段加熱のヒートパターンを必要とすることが多いが、従来の上記特許文献1に開示された熱処理設備では、このような多様なヒートパターンで金属を浸炭,焼入れ等、熱処理することの要請に応じられないという問題があった。
なお、上記特許文献1に開示された熱処理設備にてあえて2段加熱パターンを実行しようとすれば、処理品を冷却油槽に沈めるほかなかったが、そうすると再加熱する前に処理品に付着した油を除去洗浄する必要が生じるなど、きわめて処理効率の悪いものになるので現実的でない。
By the way, in order to improve the strength of the treated product as compared with the conventional carburized product, it is often necessary to have a two-step heating heat pattern that is once cooled after heating (carburizing) and then reheated. However, the conventional heat treatment equipment disclosed in Patent Document 1 has a problem that it cannot meet the demand for heat treatment such as carburizing and quenching of the metal with such various heat patterns.
If the two-stage heating pattern is to be executed intentionally in the heat treatment facility disclosed in Patent Document 1, the treated product must be submerged in a cooling oil tank, but if this is the case, the oil adhered to the treated product before reheating is performed. It is not practical because the processing efficiency becomes extremely poor.
上記課題を解決するため本発明に係る熱処理設備は、複数のバッチ式熱処理チャンバと、搬送ユニットとを備え、前記バッチ式熱処理チャンバには処理品を加熱するヒータが夫々設けられ、前記搬送ユニットは保温チャンバと受渡チャンバとを台車上に支持することでレール上を走行可能に設けられ、該受渡チャンバには処理品を前記バッチ式熱処理チャンバとの間および保温チャンバとの間で受け渡しする受渡機構が設けられ、該保温チャンバには処理品を保温するヒータおよび冷却ガスを強制循環することにより処理品を冷却するガス冷却手段が設けられていることを特徴とする。
また、本発明は上記熱処理設備において、直線状のレールの一側に複数のバッチ式熱処理チャンバをその開口部側を該レール側に向けて並設し、搬送ユニットは保温チャンバと受渡チャンバとを台車上にその走行方向と直交する方向に微小に進退動可能なるように支持することにより、該受渡チャンバの開口部を前記各バッチ式熱処理チャンバの開口部に密着させられるようにしたことを特徴とする。
In order to solve the above problems, a heat treatment facility according to the present invention includes a plurality of batch-type heat treatment chambers and a transfer unit, and each of the batch-type heat treatment chambers is provided with a heater for heating a processed product. A delivery mechanism that is provided so as to be able to run on a rail by supporting a heat insulation chamber and a delivery chamber on a carriage, and delivers a treated product to and from the batch heat treatment chamber and the heat treatment chamber in the delivery chamber. And a gas cooling means for cooling the processed product by forcibly circulating a cooling gas.
Further, the present invention provides the above heat treatment equipment, wherein a plurality of batch-type heat treatment chambers are arranged in parallel on one side of the linear rail with the opening side facing the rail side, and the transfer unit includes a heat insulation chamber and a delivery chamber. The opening of the delivery chamber can be brought into close contact with the opening of each batch-type heat treatment chamber by supporting the carriage so that it can be moved forward and backward in a direction perpendicular to the traveling direction. And
本発明に係る熱処理設備によれば、処理品を多様なヒートパターンで効率よく熱処理することができる。   According to the heat treatment facility according to the present invention, the processed product can be efficiently heat-treated with various heat patterns.
図1は本発明の実施形態である熱処理設備の平面図である。同図において、1,1は直線状に配設された平行な2本のレール、2a〜2cは該レールの一側にその開口部を該レール側に向けて並設したバッチ式熱処理チャンバ、3は該レール上を走行するように設けられた搬送ユニット、4は該熱処理チャンバ2aの隣に並設された装入テーブル、5は該熱処理チャンバ2cの隣に並設された冷却油槽である。なお、図1は搬送ユニット3が熱処理チャンバ2bと相対するように停止した状態を示す。   FIG. 1 is a plan view of a heat treatment facility according to an embodiment of the present invention. In the figure, 1 and 1 are two parallel rails arranged in a straight line, and 2a to 2c are batch-type heat treatment chambers in which one side of the rail is arranged with its opening facing the rail side, 3 is a transfer unit provided to run on the rail, 4 is a charging table arranged next to the heat treatment chamber 2a, and 5 is a cooling oil tank arranged next to the heat treatment chamber 2c. . FIG. 1 shows a state where the transfer unit 3 is stopped so as to face the heat treatment chamber 2b.
バッチ式熱処理チャンバ2a〜2cは、図2に縦断面図を示したように、円筒形に形成された耐圧性の炉殻内に断熱材6によって囲繞した処理室7を形成し、該処理室内に設けた架台8上に処理品Wが載置されるもので、9は該処理室に処理品Wを出し入れする開口部である。該開口部には内面に断熱材6が張着された気密性の開閉扉10が設けられ、該開閉扉はその上部に水平に設けられたシリンダ11を作動させることにより該チャンバの開口縁に設けられたフランジ12の内面に沿って横スライドし、該開口部9を開閉可能なるようにしている。13は該処理室内壁に該処理品Wを加熱するために設けたヒータ、14は該処理室内に設けられたファンで、該ファンはモータ15の駆動により該処理室内のガスを攪拌する。また、16は該熱処理チャンバ2a〜2cを真空ポンプ(図示せず)に繋ぐため形成された吸気口で、該吸気口から該熱処理チャンバ内の空気を吸引することにより該チャンバ内(処理室7内)を真空状態(減圧状態)にする。また、17は該チャンバ内(処理室7内)にアセチレン等の浸炭ガスを供給する給ガス口で、該給ガス口は配管により浸炭ガスのガス源(図示せず)と連結される。   As shown in the longitudinal sectional view of FIG. 2, the batch type heat treatment chambers 2a to 2c form a processing chamber 7 surrounded by a heat insulating material 6 in a pressure-resistant furnace shell formed in a cylindrical shape. The processing product W is placed on the gantry 8 provided in the, and 9 is an opening through which the processing product W is taken in and out of the processing chamber. The opening is provided with an airtight opening / closing door 10 in which a heat insulating material 6 is attached to the inner surface, and the opening / closing door is operated at the opening edge of the chamber by operating a cylinder 11 provided horizontally above the opening / closing door. The opening 9 can be opened and closed by laterally sliding along the inner surface of the flange 12 provided. Reference numeral 13 denotes a heater provided on the processing chamber wall for heating the processed product W, and reference numeral 14 denotes a fan provided in the processing chamber. The fan stirs the gas in the processing chamber by driving the motor 15. Reference numeral 16 denotes an air inlet formed to connect the heat treatment chambers 2a to 2c to a vacuum pump (not shown). By sucking air in the heat treatment chamber from the air inlet, the inside of the chamber (the processing chamber 7) is drawn. (Inside) is in a vacuum state (reduced pressure state). Reference numeral 17 denotes a gas supply port for supplying a carburizing gas such as acetylene into the chamber (inside the processing chamber 7). The gas supply port is connected to a gas source (not shown) of the carburizing gas by a pipe.
一方、搬送ユニット3は、図3に縦断面図を示すように保温チャンバ20と受渡チャンバ21とをフランジ22を間にして直線状に結合すると共に、レール1,1上を走行し得るように設けられた台車23上にコロローラ24を配置し、該コロローラ上に保温チャンバ20を支持することにより、該保温チャンバ20と受渡チャンバ21とを該台車23の走行方向と直交する方向に微小に進退動可能なるように支持している。46は該保温チャンバ20と受渡チャンバ21とを微小に進退動させるために該台車上に設けたシリンダである。また、図1に符号41で示すものは該搬送ユニット3の保温チャンバ20の一側に固設された真空ポンプ、41a,41bは該真空ポンプの吸気管に設けられた電磁バルブたる真空排気弁である。   On the other hand, as shown in the longitudinal sectional view of FIG. 3, the transport unit 3 linearly couples the heat retaining chamber 20 and the delivery chamber 21 with the flange 22 therebetween, and can run on the rails 1 and 1. By placing the roller 24 on the provided carriage 23 and supporting the heat retaining chamber 20 on the roller 23, the heat retaining chamber 20 and the delivery chamber 21 are slightly advanced and retracted in a direction perpendicular to the traveling direction of the carriage 23. Supports to be movable. Reference numeral 46 denotes a cylinder provided on the carriage in order to make the heat retaining chamber 20 and the delivery chamber 21 advance and retract minutely. 1 is a vacuum pump fixed on one side of the heat retaining chamber 20 of the transport unit 3, and 41a and 41b are vacuum exhaust valves which are electromagnetic valves provided on the intake pipe of the vacuum pump. It is.
保温チャンバ20は、図4にも示したように円筒形に形成された耐圧性の炉殻内に断熱材25によって囲繞した処理室26を形成し、該処理室内に処理品Wが載置される架台27を設けると共に、該処理室内壁に保温用のヒータ28を設け、該処理室26の上壁と下壁に夫々通風口29,30を形成し、該通風口に夫々シリンダ31,32により開閉可能なるように断熱性扉33,34を設けている。44は炉内ガスを強制循環させるために上方の通風口29の上部に設けられたモータ45によって回転するよう配置されたファンである。なお、37は該ファン44の過熱を防止するために通風口29上に設けられた冷却水配管である。また、38,38は処理室26の両側に配置された一対の熱交換器からなるガス冷却手段で、該熱交換器中に冷却水を通水することにより該熱交換器は低温度に保たれる。39は受渡チャンバ21との境に設けられた開閉扉で、該開閉扉は上部に水平に設けられたシリンダ40を作動させることによりフランジ22の内面に沿って横スライドする。なお、該開閉扉39の内面にも断熱材25が張着されている。このため、該保温チャンバ20は該開閉扉39を閉じることにより受渡チャンバ21との間に気密性、断熱性が保たれる。42は吸気口で、該吸気口は前記真空ポンプ41の真空排気弁41aに繋がれ、該吸気口からガスを吸引することにより該保温チャンバ内を減圧状態にできる。また、43は該保温チャンバ内に窒素ガス等の不活性ガスを供給するために形成された給ガス口で、該給ガス口はフレキシブルホース(図示せず)を介してガス源(図示せず)に連結される。   As shown in FIG. 4, the heat insulation chamber 20 forms a processing chamber 26 surrounded by a heat insulating material 25 in a pressure-resistant furnace shell formed in a cylindrical shape, and a processed product W is placed in the processing chamber. And a heater 28 for heat insulation are provided on the walls of the processing chamber, and vent holes 29 and 30 are formed on the upper and lower walls of the processing chamber 26, respectively. Cylinders 31 and 32 are provided at the vent holes, respectively. The heat insulating doors 33 and 34 are provided so that they can be opened and closed. A fan 44 is arranged to be rotated by a motor 45 provided at the upper part of the upper ventilation port 29 in order to forcibly circulate the gas in the furnace. Reference numeral 37 denotes a cooling water pipe provided on the vent hole 29 in order to prevent the fan 44 from overheating. Reference numerals 38 and 38 denote gas cooling means composed of a pair of heat exchangers disposed on both sides of the processing chamber 26, and the heat exchanger is kept at a low temperature by passing cooling water through the heat exchanger. Be drunk. Reference numeral 39 denotes an opening / closing door provided at the boundary with the delivery chamber 21, and the opening / closing door slides laterally along the inner surface of the flange 22 by operating a cylinder 40 provided horizontally at the upper portion. A heat insulating material 25 is also attached to the inner surface of the open / close door 39. For this reason, the heat insulation chamber 20 is kept airtight and heat-insulating with the delivery chamber 21 by closing the door 39. Reference numeral 42 denotes an intake port, which is connected to a vacuum exhaust valve 41a of the vacuum pump 41, and the inside of the heat retaining chamber can be decompressed by sucking gas from the intake port. Reference numeral 43 denotes a gas supply port formed for supplying an inert gas such as nitrogen gas into the heat retaining chamber. The gas supply port is connected to a gas source (not shown) via a flexible hose (not shown). ).
受渡チャンバ21は、略円筒形で耐圧性に形成され、その一端を前記フランジ22の外面にボルト50によって固定すると共に、他端に枠状パッキン51が固着され、前記シリンダ46を作動させて該受渡チャンバ21を保温チャンバ20と共に進出動させたときに図5に示したように該枠状パッキン51が前記熱処理チャンバ2a〜2cの開口部に設けられたフランジ12外面に気密に圧接し得るようにしている。また、52は該受渡チャンバ21内底部に設けられた受渡機構で、該受渡機構は図6に概略を示すように、処理品Wを載置し得るフォーク53が水平スライド部材54a,54b上に支持され、該水平スライド部材をモータ等の駆動源により進退動させることにより該フォーク53が前記熱処理チャンバ2a〜2c内および保温チャンバ20内に進退動し、前記架台8,27上の処理品Wを該フォーク53上に受け渡しできるようにしている。また、55は該受渡チャンバ21を前記真空ポンプ41の真空排気弁41bに繋ぐために形成された吸気口、56は該受渡チャンバ内に窒素ガス等の不活性ガスを供給するために形成された給ガス口で、該給ガス口はフレキシブルホース(図示せず)を介して給気源(図示せず)に連結される。   The delivery chamber 21 has a substantially cylindrical shape and is pressure resistant. One end of the delivery chamber 21 is fixed to the outer surface of the flange 22 with a bolt 50, and the other end is fixed with a frame-like packing 51. When the delivery chamber 21 is moved forward together with the heat retaining chamber 20, as shown in FIG. 5, the frame-like packing 51 can be brought into airtight contact with the outer surface of the flange 12 provided in the openings of the heat treatment chambers 2a to 2c. I have to. Reference numeral 52 denotes a delivery mechanism provided at the inner bottom of the delivery chamber 21. As shown schematically in FIG. 6, the delivery mechanism has a fork 53 on which the processed product W can be placed on the horizontal slide members 54a and 54b. The fork 53 is moved back and forth in the heat treatment chambers 2a to 2c and the heat retaining chamber 20 by moving the horizontal slide member forward and backward by a drive source such as a motor, and the processed product W on the mounts 8 and 27 is supported. Can be transferred onto the fork 53. Also, 55 is an intake port formed to connect the delivery chamber 21 to the vacuum exhaust valve 41b of the vacuum pump 41, and 56 is formed to supply an inert gas such as nitrogen gas into the delivery chamber. At the gas supply port, the gas supply port is connected to an air supply source (not shown) via a flexible hose (not shown).
図1に示した冷却油槽5は、容器中に焼入れ用の冷却油が収容され、該容器のレール1,1側と相対する前面にフランジ63を備えた開口が形成され、該開口内にシリンダ65を作動させることにより自動で開閉する引戸式の扉60が設けられ、その背面にはフランジ64を備えた開口が形成され、該開口内にシリンダ66を作動させることにより自動で開閉する引戸式の扉61を設けたものである。   The cooling oil tank 5 shown in FIG. 1 contains quenching cooling oil in a container, an opening having a flange 63 is formed on the front surface of the container facing the rails 1 and 1, and a cylinder is formed in the opening. A sliding door type door 60 that automatically opens and closes by actuating 65 is provided, an opening having a flange 64 is formed on the back surface thereof, and a sliding door type that automatically opens and closes by operating a cylinder 66 in the opening. The door 61 is provided.
このように構成した熱処理設備において、処理品Wを例えば図7に示したように、950℃に昇温・均熱して浸炭・拡散させた後、100℃〜650℃に冷却し、その後、該処理品Wを850℃に再度昇温・均熱して浸炭・拡散させ、850℃にて保温後に油冷するといった2段加熱のヒートパターンにて熱処理する手順を次に説明する。先ず、装入テーブル4上にある処理品Wを搬送ユニット3によってバッチ式熱処理チャンバ2a〜2cのいずれかに搬入する。そのために搬送ユニット3をレール1,1上を走行させて装入テーブル4の前に停止し、受渡機構52を作動させることにより該装入テーブル上の処理品Wをフォーク53上に受けて受渡チャンバ21内に入れる。そして搬送ユニット3をいずれかの熱処理チャンバの前に移動・停止させ、シリンダ46を作動させることにより受渡チャンバ21の枠状パッキン51を該熱処理チャンバのフランジ12外面に圧接させた後、真空排気弁41bを開放して真空ポンプ41により受渡チャンバ21内部を真空排気する。真空排気完了後、該熱処理チャンバの開閉扉10を開き、フォーク53を進出させることにより該処理品Wを該熱処理チャンバ内に装入する。   In the heat treatment equipment configured in this way, as shown in FIG. 7, for example, the processed product W is heated to 950 ° C., soaked, carburized and diffused, and then cooled to 100 ° C. to 650 ° C. Next, a procedure for heat-treating the processed product W in a two-step heating pattern in which the temperature of the processed product W is raised to 850 ° C., soaked, carburized and diffused, kept at 850 ° C., and then oil cooled will be described. First, the processed product W on the charging table 4 is carried into one of the batch heat treatment chambers 2 a to 2 c by the transport unit 3. For this purpose, the transport unit 3 runs on the rails 1 and 1 and stops in front of the loading table 4 and operates the delivery mechanism 52 to receive the processed product W on the loading table on the fork 53 and deliver it. Place in chamber 21. Then, the transfer unit 3 is moved and stopped before any one of the heat treatment chambers, and the cylinder 46 is operated to press the frame packing 51 of the delivery chamber 21 against the outer surface of the flange 12 of the heat treatment chamber, and then the vacuum exhaust valve 41b is opened and the inside of the delivery chamber 21 is evacuated by the vacuum pump 41. After completion of evacuation, the heat treatment chamber opening / closing door 10 is opened, and the fork 53 is advanced to load the processed product W into the heat treatment chamber.
該熱処理チャンバは予め850℃〜950℃程度に予熱されており、処理品W装入後は、引き続き処理品Wの昇温工程が行われる。この際特に650℃以下の低温域での昇温速度を短縮する目的で、窒素ガスを大気圧程度まで導入して輻射加熱と対流加熱を併用してもよい。処理品Wが浸炭温度(ここでは950℃)に昇温できたら、一旦該熱処理チャンバ内の窒素ガスを再度真空排気した後、浸炭ガスを所定量だけ導入して、浸炭・拡散工程が行われる。浸炭ガスは予め設定された条件に従って、断続的に導入される。その間に保温チャンバ20および受渡チャンバ21は、真空排気弁41aおよび41bを開き真空ポンプ41により真空排気されたまま、処理品Wを受け入れるために待機している。浸炭・拡散工程完了後、開閉扉10および39を開き、該熱処理チャンバ内に受渡機構52のフォーク53を進出させて該フォーク上に処理品Wを受け、該フォーク53を後退させることによりそのまま該フォーク53を保温チャンバ20内に進出させ、該熱処理チャンバから取り出した処理品Wを該保温チャンバ内の架台27上に載置する。そして、開閉扉10および39を閉じ、さらに真空排気弁41aを閉じた後、給ガス口43より窒素ガスを導入し、該保温チャンバ20内を所定の圧力に加圧して、ガス冷却手段たる熱交換器38に冷却水を通水すると共に、ファン44を回転させ該保温チャンバ20内のガスを図4に矢印で示したように、通風口29,30を通して熱交換器38,38と処理品Wに強制循環させ、該処理品Wをガス冷却する。これにより処理品Wは100℃〜650℃の所要温度に冷却される。   The heat treatment chamber is preheated to about 850 ° C. to 950 ° C., and after the processing product W is charged, the temperature raising process of the processing product W is continuously performed. At this time, for the purpose of shortening the rate of temperature rise particularly in a low temperature region of 650 ° C. or less, nitrogen gas may be introduced to about atmospheric pressure and radiation heating and convection heating may be used in combination. Once the processed product W has been raised to the carburizing temperature (here, 950 ° C.), the nitrogen gas in the heat treatment chamber is once evacuated again, and then a predetermined amount of the carburizing gas is introduced to perform the carburizing / diffusion process. . The carburizing gas is introduced intermittently according to preset conditions. In the meantime, the heat retaining chamber 20 and the delivery chamber 21 are waiting to receive the processed product W while the vacuum exhaust valves 41a and 41b are opened and the vacuum pump 41 is evacuated. After the carburizing / diffusion process is completed, the doors 10 and 39 are opened, the fork 53 of the delivery mechanism 52 is advanced into the heat treatment chamber, the processed product W is received on the fork, and the fork 53 is retracted to directly The fork 53 is advanced into the heat insulation chamber 20, and the processed product W taken out from the heat treatment chamber is placed on the gantry 27 in the heat insulation chamber. Then, after opening and closing the doors 10 and 39 and further closing the vacuum exhaust valve 41a, nitrogen gas is introduced from the gas supply port 43, the inside of the heat retaining chamber 20 is pressurized to a predetermined pressure, and the heat as gas cooling means The cooling water is passed through the exchanger 38, and the fan 44 is rotated so that the gas in the heat retaining chamber 20 passes through the ventilation openings 29 and 30 and the heat exchangers 38 and 38 and the processed product as indicated by arrows in FIG. The processed product W is gas-cooled by forced circulation to W. Thereby, the processed product W is cooled to a required temperature of 100 ° C. to 650 ° C.
そして、冷却を終えた処理品Wは、受渡チャンバ21を経て再び熱処理チャンバ2a〜2cに装入され、該熱処理チャンバにて再加熱し、850℃に昇温・均熱後、浸炭ガスを導入して2回目の浸炭・拡散工程を行う。この間に該保温チャンバはヒータ28に通電することにより、850℃に予熱され、再度該処理品Wを受け入れるために待機している。浸炭・処理工程完了後、該処理品Wは再度前回と同様の手順により該熱処理チャンバから該保温チャンバに搬送され、該保温チャンバにて850℃に保持されると共に、その間に、搬送ユニット3は該熱処理チャンバから冷却油槽5の前に移動・停止し、シリンダ46を作動させることにより受渡チャンバ21の枠状パッキン51を該冷却油槽5のフランジ63外面に圧接させた後、真空排気弁41bを開放して真空ポンプ41により受渡チャンバ21内部を一旦真空排気し、その後、真空排気弁41を閉じ、給ガス口56を開いて窒素ガスを導入し、該受渡チャンバ21内が大気圧の窒素ガスで満たされるようにする。所定の保持時間経過後、真空排気弁41aを閉じ、給ガス口43を開いて窒素ガスを導入し、該保温チャンバ20内を大気圧の窒素ガスで満たしてから、開閉扉60および39を開き、受渡機構52のフォーク53を該保温チャンバ20内に進出させて該処理品Wを受け、該フォーク53を前進させることによりそのまま該フォーク53を冷却油槽5内に進出させ、該保温チャンバ20から取り出した処理品Wを冷却油槽5内の架台上に載置する。開閉扉60および39を閉じ、冷却油槽5内の架台を油槽内で降下させることにより、該処理品Wは焼入油中に浸漬され、焼入れ工程が行われる。このようにして一連の熱処理を終えた処理品Wは、該冷却油槽5の背面に設けられた扉61を開けて抽出される。   After the cooling, the processed product W is inserted into the heat treatment chambers 2a to 2c again through the delivery chamber 21, reheated in the heat treatment chamber, heated to 850 ° C. and soaked, and then the carburized gas is introduced. Then, the second carburizing / diffusion process is performed. During this time, the heat retaining chamber is preheated to 850 ° C. by energizing the heater 28, and is waiting to receive the processed product W again. After completion of the carburizing / processing step, the processed product W is again transported from the heat treatment chamber to the heat retaining chamber by the same procedure as the previous time, and is maintained at 850 ° C. in the heat retaining chamber. After moving / stopping from the heat treatment chamber before the cooling oil tank 5 and operating the cylinder 46, the frame packing 51 of the delivery chamber 21 is brought into pressure contact with the outer surface of the flange 63 of the cooling oil tank 5, and then the vacuum exhaust valve 41b is set. The delivery chamber 21 is once evacuated by the vacuum pump 41, and then the evacuation valve 41 is closed, the supply gas port 56 is opened and nitrogen gas is introduced, and the delivery chamber 21 is filled with atmospheric nitrogen gas. To be filled with. After a predetermined holding time has elapsed, the vacuum exhaust valve 41a is closed, the gas supply port 43 is opened, nitrogen gas is introduced, the interior of the heat retaining chamber 20 is filled with nitrogen gas at atmospheric pressure, and the open / close doors 60 and 39 are opened. The fork 53 of the delivery mechanism 52 is advanced into the heat retaining chamber 20 to receive the processed product W, and the fork 53 is advanced to advance into the cooling oil tank 5 as it is. The taken out processed product W is placed on a frame in the cooling oil tank 5. By closing the open / close doors 60 and 39 and lowering the frame in the cooling oil tank 5 in the oil tank, the processed product W is immersed in the quenching oil, and a quenching process is performed. The processed product W that has been subjected to the series of heat treatments in this way is extracted by opening the door 61 provided on the back surface of the cooling oil tank 5.
なお、保温チャンバ20内で処理品Wを冷却している間に搬送ユニット3を移動させ、装入テーブル4上に用意された次の処理品Wを空いている熱処理チャンバ2a〜2cに装入することができると共に、該熱処理チャンバ2a〜2c内の再加熱が終わった処理品Wを該熱処理チャンバから取り出して冷却油槽5に搬送することができる。このため本発明の熱処理設備は、バッチ式でありながらも処理品Wを次から次へと効率よく熱処理することができ高い生産性を維持することができる。   The transport unit 3 is moved while the processed product W is being cooled in the heat retaining chamber 20, and the next processed product W prepared on the charging table 4 is charged into the empty heat treatment chambers 2 a to 2 c. In addition, the processed product W that has been reheated in the heat treatment chambers 2 a to 2 c can be taken out of the heat treatment chamber and transferred to the cooling oil tank 5. For this reason, although the heat treatment equipment of the present invention is a batch type, the processed product W can be efficiently heat-treated from one to the next, and high productivity can be maintained.
しかも本発明では、搬送ユニット3の保温チャンバ20と受渡チャンバ21とを台車23上にその走行方向と直交する方向に微小に進退動可能なるように支持することにより、該受渡チャンバ21の開口部を前記各バッチ式熱処理チャンバ2a〜2cの開口部に密着させられるようにし、該保温チャンバ20にガス冷却手段を備えたことにより、外部空気に曝すことなく処理品Wを該熱処理チャンバから保温チャンバ20に移動させ冷却ガスを強制循環することにより該処理品Wをガス冷却することができるので、この実施形態に示した2段加熱のように種々の処理品を金属の特質に依存する多様なヒートパターンにより熱処理することの要請に応じることができる。   In addition, in the present invention, the opening chamber of the delivery chamber 21 is supported by supporting the heat retaining chamber 20 and the delivery chamber 21 of the transport unit 3 on the carriage 23 so that they can be moved forward and backward in a direction perpendicular to the traveling direction. Can be brought into close contact with the openings of the batch-type heat treatment chambers 2a to 2c, and the heat insulation chamber 20 is provided with a gas cooling means, so that the processed product W can be removed from the heat treatment chamber without being exposed to external air. Since the processed product W can be gas-cooled by moving it to 20 and forcibly circulating the cooling gas, various processed products depend on the characteristics of the metal as in the two-stage heating shown in this embodiment. It is possible to meet the demand for heat treatment by a heat pattern.
なお、この実施形態ではレールの一側に3つの熱処理チャンバ2a〜2cを設けたが、熱処理チャンバの数は生産能力の要請に従い増減することができる。また、搬送ユニット3についてもレール上に2台以上を走行させるようにしてもよい。また、受渡機構52はこの実施形態ではフォーク53を進退動させる構成としたが、受渡機構はこのような構成に限らずローラ式等その他の機構としてもよい。   In this embodiment, three heat treatment chambers 2a to 2c are provided on one side of the rail. However, the number of heat treatment chambers can be increased or decreased according to the demand for production capacity. Further, two or more transport units 3 may be run on the rail. The delivery mechanism 52 is configured to move the fork 53 forward and backward in this embodiment, but the delivery mechanism is not limited to such a configuration, and may be a roller type or other mechanism.
本発明の実施形態を示す熱処理設備の平面図。The top view of the heat processing equipment which shows embodiment of this invention. 図1のバッチ式熱処理チャンバの縦断面図。The longitudinal cross-sectional view of the batch type heat processing chamber of FIG. 図1の搬送ユニットの縦断面図。FIG. 2 is a longitudinal sectional view of the transport unit in FIG. 1. 図3のA−A線断面図。AA line sectional view of Drawing 3. 図1のB−B線断面図。FIG. 3 is a sectional view taken along line BB in FIG. 1. 本発明の実施形態を示す受渡機構の概略図。The schematic diagram of the delivery mechanism which shows the embodiment of the present invention. 本発明の熱処理設備による処理品のヒートパターン図。The heat pattern figure of the processed goods by the heat processing equipment of this invention.
符号の説明Explanation of symbols
W 処理品
1 レール
2a〜2c バッチ式熱処理チャンバ
3 搬送ユニット
4 装入テーブル
5 冷却油槽
9 開口部
10 開閉扉
13 ヒータ
16 吸気口
17 給ガス口
20 保温チャンバ
21 受渡チャンバ
23 台車
24 コロローラ
28 ヒータ
29,30 通風口
38 ガス冷却手段(熱交換器)
39 開閉扉
41 真空ポンプ
42 吸気口
43 給ガス口
44 ファン
52 受渡機構
55 吸気口
56 給ガス口
W treated product 1 Rail 2a to 2c Batch type heat treatment chamber 3 Transfer unit 4 Loading table 5 Cooling oil tank 9 Opening portion 10 Opening / closing door 13 Heater 16 Intake port 17 Gas supply port 20 Heat insulation chamber 21 Delivery chamber 23 Cart 24 Roller roller 28 Heater 29 , 30 Ventilation port 38 Gas cooling means (heat exchanger)
39 Opening / closing door 41 Vacuum pump 42 Intake port 43 Gas supply port 44 Fan 52 Delivery mechanism 55 Intake port 56 Gas supply port

Claims (2)

  1. 複数のバッチ式熱処理チャンバと、搬送ユニットとを備え、前記バッチ式熱処理チャンバには処理品を加熱するヒータが夫々設けられ、前記搬送ユニットは保温チャンバと受渡チャンバとを台車上に支持することでレール上を走行可能に設けられ、該受渡チャンバには処理品を前記バッチ式熱処理チャンバとの間および保温チャンバとの間で受け渡しする受渡機構が設けられ、該保温チャンバには処理品を保温するヒータおよび冷却ガスを強制循環することにより処理品を冷却するガス冷却手段が設けられていることを特徴とした熱処理設備。   The batch-type heat treatment chamber includes a plurality of batch-type heat treatment chambers and a transfer unit, and each of the batch-type heat treatment chambers is provided with a heater for heating a processed product, and the transfer unit supports the heat retaining chamber and the delivery chamber on a carriage. The delivery chamber is provided so as to be able to travel, and the delivery chamber is provided with a delivery mechanism for delivering the processed product to and from the batch heat treatment chamber and the heat retaining chamber, and the heat retaining chamber keeps the processed product warm. A heat treatment facility characterized in that a gas cooling means for cooling a processed product by forcibly circulating a heater and a cooling gas is provided.
  2. 直線状のレールの一側に複数のバッチ式熱処理チャンバをその開口部側を該レール側に向けて並設し、搬送ユニットは保温チャンバと受渡チャンバとを台車上にその走行方向と直交する方向に微小に進退動可能なるように支持することにより、該受渡チャンバの開口部を前記各バッチ式熱処理チャンバの開口部に密着させられるようにしたこと特徴とする請求項1に記載の熱処理設備。   A plurality of batch-type heat treatment chambers are arranged in parallel on one side of the linear rail with the opening side facing the rail side, and the transfer unit has a heat retaining chamber and a delivery chamber on the carriage in a direction perpendicular to the traveling direction. The heat treatment equipment according to claim 1, wherein the opening portion of the delivery chamber can be brought into close contact with the opening portion of each batch heat treatment chamber by supporting it so that it can be moved forward and backward.
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Cited By (7)

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Publication number Priority date Publication date Assignee Title
JP2010266176A (en) * 2009-05-18 2010-11-25 Ihi Corp Multi-chamber type heat treatment device
EP2264389A1 (en) * 2009-06-13 2010-12-22 Elino Industrie-Ofenbau GmbH Furnace assembly
JP2015017790A (en) * 2013-07-12 2015-01-29 大同特殊鋼株式会社 Heat treatment equipment
JP5669981B1 (en) * 2014-10-27 2015-02-18 中外炉工業株式会社 Heat treatment equipment
JP2015074818A (en) * 2013-10-11 2015-04-20 Dowaサーモテック株式会社 Carburization hardening facility
JP2016044933A (en) * 2014-08-26 2016-04-04 大同特殊鋼株式会社 Vacuum treatment equipment
WO2016158559A1 (en) * 2015-03-30 2016-10-06 株式会社Ihi Heat treatment system

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JP2005009702A (en) * 2003-06-17 2005-01-13 Jh Corp Multi-cell type vacuum heat treating apparatus
JP2006063363A (en) * 2004-08-25 2006-03-09 Daido Steel Co Ltd Heat treatment facility

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JP2005009702A (en) * 2003-06-17 2005-01-13 Jh Corp Multi-cell type vacuum heat treating apparatus
JP2006063363A (en) * 2004-08-25 2006-03-09 Daido Steel Co Ltd Heat treatment facility

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010266176A (en) * 2009-05-18 2010-11-25 Ihi Corp Multi-chamber type heat treatment device
EP2264389A1 (en) * 2009-06-13 2010-12-22 Elino Industrie-Ofenbau GmbH Furnace assembly
JP2015017790A (en) * 2013-07-12 2015-01-29 大同特殊鋼株式会社 Heat treatment equipment
JP2015074818A (en) * 2013-10-11 2015-04-20 Dowaサーモテック株式会社 Carburization hardening facility
JP2016044933A (en) * 2014-08-26 2016-04-04 大同特殊鋼株式会社 Vacuum treatment equipment
JP5669981B1 (en) * 2014-10-27 2015-02-18 中外炉工業株式会社 Heat treatment equipment
JP2016084983A (en) * 2014-10-27 2016-05-19 中外炉工業株式会社 Heat treatment facility
WO2016158559A1 (en) * 2015-03-30 2016-10-06 株式会社Ihi Heat treatment system
JPWO2016158559A1 (en) * 2015-03-30 2017-09-14 株式会社Ihi Heat treatment system
US20170370648A1 (en) * 2015-03-30 2017-12-28 Ihi Corporation Heat treatment system
EP3279595A4 (en) * 2015-03-30 2018-10-17 IHI Corporation Heat treatment system

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