JP2011012294A - Heat treatment apparatus, heat treatment facility, and heat treatment method - Google Patents

Heat treatment apparatus, heat treatment facility, and heat treatment method Download PDF

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JP2011012294A
JP2011012294A JP2009155634A JP2009155634A JP2011012294A JP 2011012294 A JP2011012294 A JP 2011012294A JP 2009155634 A JP2009155634 A JP 2009155634A JP 2009155634 A JP2009155634 A JP 2009155634A JP 2011012294 A JP2011012294 A JP 2011012294A
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heat treatment
treatment apparatus
heat
workpiece
storage
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JP5443856B2 (en
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Koji Abe
浩次 阿部
Fumitaka Abukawa
文隆 虻川
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Dowa Thermotech Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide a heat treatment apparatus which prevents discharge of heat from the inside of the treating apparatus as far as possible and has high energy efficiency, in which the atmosphere in the apparatus is made uniform with high precision, and which has good space efficiency, to provide a heat treatment method, and further, to provide a heat treatment facility provided with the heat treatment apparatus.SOLUTION: The heat treatment apparatus for carrying out the heat treatment on a workpiece, is provided with; a casing provided with heat-insulating material; workpiece storage shelves arranged in the inside of the casing and having a plurality of storage stages; a drawing type tray installed on each storage stage of the workpiece storage shelf; a heater for heating gas in the inside of the casing; and a circulating fan for circulating the gas in the inside of the casing.

Description

本発明は、雰囲気中で焼鈍し、焼きならし等の熱処理を行う熱処理装置、熱処理設備および熱処理方法であって、例えば熱間鍛造等の加熱処理が行われた鋼部品などのワークに焼鈍し処理を行う熱処理装置、熱処理設備および熱処理方法に関する。   The present invention relates to a heat treatment apparatus, a heat treatment facility and a heat treatment method for performing heat treatment such as normalizing and annealing in an atmosphere, for example, annealing a workpiece such as a steel part subjected to heat treatment such as hot forging. The present invention relates to a heat treatment apparatus, a heat treatment facility, and a heat treatment method.

例えば、ギアや歯車等の鋼部品であるワークには、熱間鍛造等の前段処理が行われた後、均熱状態で所定の時間ワークを保持し、その後徐冷を行う、いわゆる焼鈍し処理が行われる。この焼鈍し処理においては、ワークをオーステナイト組織の状態で十分保持しておくために、均熱状態でワークを保持する熱処理装置が必要となる。   For example, for workpieces that are steel parts such as gears and gears, a so-called annealing treatment is performed in which a pre-treatment such as hot forging is performed, the workpiece is held for a predetermined time in a soaking state, and then gradually cooled. Is done. In this annealing treatment, a heat treatment apparatus for holding the workpiece in a soaking state is necessary in order to sufficiently hold the workpiece in the austenite structure state.

そこで、特許文献1には、回転炉床の上に放射方向にワークを複数段配置し、軸流ファンにより上下もしくは平面方向に熱風循環流を発生させ、ワークが1回転する間に、熱風によってそのワークを均熱状態で保持する熱風循環炉が開示されている。また、特許文献2には、回転するワーク載置棚と平面視周方向に熱風を循環させる熱風循環装置を備える熱処理設備が開示されている。即ち、特許文献1および特許文献2に記載の熱処理装置はワークを回転させながら熱風を接触させ均熱状態を保持する構成となっており、以下ではこの構成
をとる熱処理装置を回転型熱処理装置と呼ぶ。
Therefore, in Patent Document 1, a plurality of workpieces are arranged in a radial direction on a rotary hearth, a hot air circulation flow is generated in the vertical or planar direction by an axial fan, and the workpiece is heated by hot air during one rotation. A hot-air circulating furnace that holds the workpiece in a soaking state is disclosed. Patent Document 2 discloses a heat treatment facility that includes a rotating work mounting shelf and a hot air circulation device that circulates hot air in a circumferential direction in a plan view. That is, the heat treatment apparatuses described in Patent Document 1 and Patent Document 2 are configured to maintain a soaking state by contacting hot air while rotating a workpiece. Hereinafter, a heat treatment apparatus having this structure is referred to as a rotary heat treatment apparatus. Call.

また、従来一般的に用いられてきた連続処理炉としては、トンネル型の長い処理炉が例示され、このトンネル型処理炉では、一端のワーク搬入口から搬入されたワークが、他端のワーク搬出口へ向けて移動する間に均熱や冷却等が行われていた。   Further, as a continuous processing furnace that has been generally used conventionally, a tunnel-type long processing furnace is exemplified, and in this tunnel-type processing furnace, a work carried in from one work carry-in port is transferred to a work load at the other end. Soaking and cooling were performed while moving toward the exit.

特開2004−257658号公報JP 2004-257658 A 特開2006−200823号公報Japanese Patent Laid-Open No. 2006-200823

しかしながら、上記特許文献1、2に開示された回転型熱処理装置は、ワークを放射状に配置するため、スペース効率が悪くなってしまうという問題があった。また、ワークの搬入・搬出時にロボットアームを処理装置の炉内に入れて作業を行う際、その作業中に開放された扉から熱が放出されてしまうため、均熱のために炉内の熱を保持しておく熱処理装置としては、熱効率に問題があった。さらに、炉の扉開放時の熱の放出を極力抑えるために、炉内に空のスペースを設ける場合にも、スペースが余分に必要となるためスペース効率が悪く、ワークの収容効率も悪くなってしまうという問題があった。また、ロボットアームを炉内に入れて作業を行うため、そのロボットアーム等のトラブル時には、復旧にかなりの時間が必要になってしまうという問題点があった。   However, the rotary heat treatment apparatuses disclosed in Patent Documents 1 and 2 have a problem in that space efficiency deteriorates because the workpieces are arranged radially. In addition, when working with a robot arm placed in the furnace of a processing device when loading or unloading workpieces, heat is released from the door that is opened during the work, so the heat in the furnace is maintained for heat equalization. As a heat treatment apparatus for holding the heat, there is a problem in thermal efficiency. Furthermore, in order to suppress the release of heat when the furnace door is opened as much as possible, even when an empty space is provided in the furnace, the extra space is required, resulting in poor space efficiency and poor work accommodation efficiency. There was a problem that. In addition, since the robot arm is put in the furnace and the work is performed, there is a problem that a considerable amount of time is required for recovery in the event of trouble with the robot arm or the like.

上記トンネル型処理炉を用いた場合には、ワークの冷却を行う冷却部を通過する、各炉共通のコンベアが備えられており、冷却されたコンベアがワークの均熱を行う炉を通過する際に、均熱部の熱がコンベアに奪われてしまうため、エネルギーの無駄が発生してしまうという問題があった。また、ワークを連続してコンベア上に配置し熱処理を行う際に、ワーク同士の衝突による衝突キズを防止するためワーク同士の間隔をある程度あけて各ワークを配置するが、これによりコンベアの長さ、即ち、トンネル型処理炉全体の長さが長くなってしまうという問題があった。   When the tunnel type processing furnace is used, a conveyor common to each furnace that passes through a cooling unit that cools the workpiece is provided, and when the cooled conveyor passes through a furnace that soaks the workpiece. In addition, since the heat of the soaking part is taken away by the conveyor, there is a problem that energy is wasted. In addition, when workpieces are continuously placed on a conveyor and heat treatment is performed, each workpiece is placed with a certain distance between the workpieces in order to prevent collision scratches due to collision between workpieces. That is, there is a problem that the entire length of the tunnel type processing furnace becomes long.

そこで、上記問題点に鑑み、本発明の目的は、処理装置内からの熱の放出をできる限り防止し、エネルギー効率が高く、また装置内の雰囲気が高精度で均一であり、スペース効率のよい熱処理装置および熱処理方法を提供し、さらに、該熱処理装置を備える熱処理設備を提供することにある。   Therefore, in view of the above problems, the object of the present invention is to prevent the release of heat from the inside of the processing apparatus as much as possible, to have high energy efficiency, and the atmosphere in the apparatus is highly accurate and uniform, and has good space efficiency. A heat treatment apparatus and a heat treatment method are provided, and a heat treatment facility including the heat treatment apparatus is provided.

本発明によれば、ワークの熱処理を行う熱処理装置であって、断熱材を備えた筐体と、前記筐体内部に設けられる複数の収納段を有するワーク収納棚と、前記ワーク収納棚の各収納段に設置される引出し式トレイと、前記筐体の内部の気体を加熱する加熱器と、前記筐体内部の気体を循環させる循環ファンと、を備える熱処理装置が提供される。   According to the present invention, there is provided a heat treatment apparatus for performing heat treatment of a work, a housing provided with a heat insulating material, a work storage shelf having a plurality of storage stages provided inside the housing, and each of the work storage shelves. There is provided a heat treatment apparatus including a drawer-type tray installed in a storage stage, a heater that heats the gas inside the casing, and a circulation fan that circulates the gas inside the casing.

上記熱処理装置によれば、炉体内部にワークを搬送する搬送機構を持たないため、炉体容積をコンパクトにして、かつ大量のワークを炉体内に収納させることが可能となる。即ち、ワークを均熱状態で保持するという観点から、コンパクトな炉体内に大量のワークを保持することにより熱処理の熱効率を従来の熱処理装置と比べ高めることができる。さらに、炉体容積がコンパクトであるため、使用スペースを抑えることができ、その構成部品が少ないことから、製作納期や製作コストの面でも有用性が高い。また、メンテナンス時に、比較的単純な構造であり、炉体が小さいため、メンテナンスのための炉体冷却時間が短くてすむという利点がある。   According to the heat treatment apparatus, since there is no transport mechanism for transporting the workpiece into the furnace body, the furnace body volume can be made compact and a large amount of work can be stored in the furnace body. That is, from the viewpoint of holding the workpiece in a soaking state, the thermal efficiency of the heat treatment can be increased compared to the conventional heat treatment apparatus by holding a large amount of the workpiece in a compact furnace. Furthermore, since the furnace body volume is compact, the use space can be reduced and the number of components is small, so that it is highly useful in terms of production delivery time and production cost. In addition, since the structure is relatively simple during maintenance and the furnace body is small, there is an advantage that the furnace cooling time for maintenance can be shortened.

また、上記熱処理装置は、前記収納段に流入する気体の流入側空間を1または複数の収納段ごとに複数の流路に分割する整流板と、前記流路内に各収納段に対応して取り付けられる風量調整用ダンパーと、を備えている。この熱処理装置によれば、各収納段に均一な熱風を供給することができ、ワークの均熱性を安定して保持することができる。これにより、製品化されたワークの品質の安定化が図られる。 Further, the heat treatment apparatus corresponds to each of the storage stages in the flow path, and a current plate that divides the inflow side space of the gas flowing into the storage stage into a plurality of flow paths for each of the one or more storage stages. And an air volume adjusting damper to be attached. According to this heat treatment apparatus, uniform hot air can be supplied to each storage stage, and the thermal uniformity of the workpiece can be stably maintained. Thereby, stabilization of the quality of the workpiece | work commercialized is achieved.

また、前記引出し式トレイの前端部および後端部に断熱材が備えられている。このため、ワークの搬入・搬出時に炉体内部から放出される熱が減少するため、炉内の雰囲気を安定化させることが可能となり、熱効率の上昇が図られる。また、前記筐体内部に大気を導入する大気導入機構を備えていてもよい。なお、前記ワークとしては自動車部品のシャフトやギアが例示される。   Further, a heat insulating material is provided at the front end portion and the rear end portion of the drawer type tray. For this reason, since the heat released from the inside of the furnace body when the work is carried in and out, the atmosphere in the furnace can be stabilized, and the thermal efficiency can be increased. Moreover, you may provide the air introduction mechanism which introduces air | atmosphere into the said housing | casing. Examples of the work include shafts and gears of automobile parts.

また、別な観点からの本発明によれば、ワークに熱処理を施す熱処理設備であって、上記熱処理装置と、上記熱処理装置の外部に設置されるワークを熱処理装置に搬入および搬出する搬送機構を備える、熱処理設備が提供される。   According to another aspect of the present invention, there is provided a heat treatment facility for performing heat treatment on a workpiece, the heat treatment apparatus and a transport mechanism for carrying the work installed outside the heat treatment apparatus into and out of the heat treatment apparatus. A heat treatment facility is provided.

上記熱処理設備によれば、ワークを熱処理装置に搬入および搬出する搬送機構が熱処理装置の外部に設置されるため、熱処理装置の外で搬送装置の故障状態を観察し、そのメンテナンスを容易に行うことができ、設備故障を少なく抑えられる。また、設備故障時の復旧も安全かつ迅速に行うことが可能である。   According to the above heat treatment equipment, since the transfer mechanism for loading and unloading the workpiece into and out of the heat treatment apparatus is installed outside the heat treatment apparatus, the failure state of the transfer apparatus is observed outside the heat treatment apparatus and the maintenance can be easily performed. Can reduce equipment failures. In addition, recovery from equipment failure can be performed safely and quickly.

さらに別の観点からの本発明によれば、上記熱処理装置を用いて、ワークに熱処理を施す熱処理方法であって、使用する引出し式トレイの数を前記ワークの処理時間および前記ワークの生産数に応じて変化させる、熱処理方法が提供される。この熱処理方法によれば、ワークの処理時間および生産数に応じて、熱処理装置をフレキシブルに稼動させることができ、生産コストおよび省エネルギーの観点から非常に有効にワークの熱処理を行うことができる。   According to another aspect of the present invention, there is provided a heat treatment method for performing heat treatment on a workpiece using the heat treatment apparatus, wherein the number of drawer-type trays to be used is set as the processing time of the workpiece and the number of workpieces produced. A heat treatment method is provided that varies accordingly. According to this heat treatment method, the heat treatment apparatus can be flexibly operated according to the work processing time and the number of production, and the heat treatment of the work can be performed very effectively from the viewpoint of production cost and energy saving.

本発明によれば、処理装置内(筐体)からの熱の放出をできる限り防止し、エネルギー効率が高く、また装置内の雰囲気が高精度で均一であり、スペース効率のよい熱処理装置および該熱処理装置を用いた熱処理設備が提供される。また、ワークの処理時間および生産数に応じて、熱処理装置をフレキシブルに稼動させることができ、生産コストおよび省エネルギーの観点から非常に有効にワークの熱処理が行える熱処理方法が提供される。   According to the present invention, it is possible to prevent heat from being discharged from the inside of the processing apparatus (housing) as much as possible, to have high energy efficiency, and to have a highly accurate and uniform atmosphere in the apparatus, and a space-efficient heat treatment apparatus and A heat treatment facility using a heat treatment apparatus is provided. Further, there is provided a heat treatment method in which the heat treatment apparatus can be flexibly operated according to the work processing time and the number of production, and the work can be heat treated very effectively from the viewpoint of production cost and energy saving.

熱処理装置1の正面断面図である。1 is a front sectional view of a heat treatment apparatus 1. 熱処理装置1の側面断面図である。2 is a side sectional view of the heat treatment apparatus 1. FIG. 熱処理設備50の概略説明図である。2 is a schematic explanatory diagram of a heat treatment facility 50. FIG. 熱処理装置60の正面断面図である。3 is a front sectional view of a heat treatment apparatus 60. FIG. 熱処理装置70の概略図である。3 is a schematic view of a heat treatment apparatus 70. FIG. 熱処理設備80の概略図である。2 is a schematic view of a heat treatment facility 80. FIG. 実施例で用いた熱処理装置の正面断面図である。It is front sectional drawing of the heat processing apparatus used in the Example. 熱処理装置において位置a〜iでの温度変化を時間の経過に沿ってグラフ化したものである。The temperature change in position ai in a heat processing apparatus is graphed along progress of time.

以下、本発明の実施の形態について図面を参照して説明する。なお、本明細書および図面において、実質的に同一の機能構成を有する構成要素については、同一の符号を付することにより重複説明を省略する。   Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the present specification and drawings, components having substantially the same functional configuration are denoted by the same reference numerals, and redundant description is omitted.

図1は本実施の形態にかかる熱処理装置1の正面断面図である。また、図2は熱処理装置1の側面断面図である。なお、図2では、以下に説明する引出し式トレイ35が一箇所引き出されている状態を図示している。   FIG. 1 is a front sectional view of a heat treatment apparatus 1 according to the present embodiment. FIG. 2 is a side sectional view of the heat treatment apparatus 1. FIG. 2 shows a state where a drawer-type tray 35 described below is pulled out at one place.

図1に示すように、熱処理装置1の外周は、断熱材9を備えた筐体10によって構成されている。筐体10は外部への放熱を抑えるために全面にわたり断熱材9で構成され、筐体10の内部には、例えばギアや歯車等の鋼部品であるワーク15を収納するワーク収納棚20(以下収納棚20とする)が設けられており、収納棚20は縦4段、横5列に分割され、複数のワーク収納部22(以下収納部22とする)に仕切られている。なお、本実施の形態にかかる熱処理装置1においては、収納棚20は縦4段、横5列に仕切られているとして説明するが、本発明はこれに限られるものではなく、収納するワークの数や大きさ等によって収納部22の数(仕切る段数および列数)は適宜定めることができる。 As shown in FIG. 1, the outer periphery of the heat treatment apparatus 1 is constituted by a housing 10 provided with a heat insulating material 9. The housing 10 is formed of a heat insulating material 9 over the entire surface in order to suppress heat radiation to the outside, and a work storage shelf 20 (hereinafter referred to as a work storage shelf 20) for storing a work 15 that is a steel part such as a gear or a gear, for example. The storage shelf 20 is divided into four vertical columns and five horizontal columns, and is partitioned into a plurality of workpiece storage units 22 (hereinafter referred to as storage units 22). In the heat treatment apparatus 1 according to the present embodiment, the storage shelf 20 is described as being partitioned into four vertical columns and five horizontal rows, but the present invention is not limited to this, and the storage shelves 20 The number of storage units 22 (the number of partitions and the number of columns) can be determined as appropriate depending on the number, size, and the like.

また、熱処理装置1内において、収納棚20下方には、加熱器24が設置され、加熱器24の側方近傍には熱処理装置1内の気体を循環させる循環ファン25が設置されている。循環ファン25にはファンを回転させる例えばモーター等の駆動機構26が接続しており、駆動機構26は熱処理装置1外周部に設置されている。また、熱処理装置1の外部には、熱処理装置1内部に連通し、大気を送り込むポンプ28が設けられている。なお、気体を加熱する前記加熱器24は必ずしも熱処理装置1内に設置されている必要はないが、スペース効率やエネルギー効率を考えた場合、熱処理装置1内に設置されることが好ましい。また、熱処理装置1内の気体を循環させるために、複数台の循環ファン25を図1に示す場所以外の適当な部分に設置してもよい。 In the heat treatment apparatus 1, a heater 24 is installed below the storage shelf 20, and a circulation fan 25 that circulates the gas in the heat treatment apparatus 1 is installed near the side of the heater 24. A driving mechanism 26 such as a motor for rotating the fan is connected to the circulation fan 25, and the driving mechanism 26 is installed on the outer periphery of the heat treatment apparatus 1. In addition, a pump 28 that communicates with the inside of the heat treatment apparatus 1 and sends air is provided outside the heat treatment apparatus 1. The heater 24 that heats the gas is not necessarily installed in the heat treatment apparatus 1, but is preferably installed in the heat treatment apparatus 1 in consideration of space efficiency and energy efficiency. Moreover, in order to circulate the gas in the heat treatment apparatus 1, a plurality of circulation fans 25 may be installed in an appropriate portion other than the place shown in FIG.

収納棚20の両側方の空間A、空間Bそれぞれには、流動する気体を整流する整流板30、31が設置されている。ここで、空間Aとは、循環ファン25から送られる気体が収納棚20に流入する際に通過する空間であり、空間Bとは、収納棚20から流出した気体が加熱器24に吸引されるまでに通過する空間である。本実施の形態にかかる熱処理装置1においては、空間Aに設けられる整流板30の形状は、図1に示すように、熱処理装置1の角部に対応する曲線形状の円弧部分と直線部分が組み合わさった形状(熱処理装置1の角に沿った形状)である。各整流板30は空間Aに4つの流路33(33a、33b、33c、33d)を形成するように設置される。4つの流路33a、33b、33c、33dは、縦に4段設けられた収納部22にそれぞれ対応し、収納部22の各段に、循環ファン25から送られる気体(熱風)を水平方向に流動させる流路となっている。また、筐体10内において、上記空間Aに形成される流路33(33a、33b、33c、33d)には、それぞれ風量調節ダンパー29が設けられている。なお、整流板30によって形成される流路の数は、本実施の形態では4つであるが、これは収納部22の段数に応じた数であり、収納部22の段数が異なればその数に応じた流路数となることが好ましい。 In each of the space A and the space B on both sides of the storage shelf 20, rectifying plates 30 and 31 for rectifying the flowing gas are installed. Here, the space A is a space that passes when the gas sent from the circulation fan 25 flows into the storage shelf 20, and the space B is the gas that has flowed out of the storage shelf 20 is sucked into the heater 24. It is a space that passes by. In the heat treatment apparatus 1 according to the present embodiment, the shape of the rectifying plate 30 provided in the space A is a combination of a curved arc portion and a straight line portion corresponding to the corners of the heat treatment apparatus 1 as shown in FIG. (A shape along a corner of the heat treatment apparatus 1). Each rectifying plate 30 is installed in the space A so as to form four flow paths 33 (33a, 33b, 33c, 33d). The four flow paths 33a, 33b, 33c, and 33d correspond to the storage sections 22 that are vertically provided in four stages, and the gas (hot air) sent from the circulation fan 25 is horizontally transmitted to each stage of the storage section 22. It is a flow path to flow. In the housing 10, air volume adjustment dampers 29 are provided in the flow paths 33 (33 a, 33 b, 33 c, 33 d) formed in the space A, respectively. The number of flow paths formed by the rectifying plate 30 is four in the present embodiment, but this is a number corresponding to the number of stages of the storage part 22, and the number is different if the number of stages of the storage part 22 is different. It is preferable that the number of flow paths be in accordance with the above.

上述したように、空間Aにおいて4段の収納部22に対応した4つの流路33(33a、33b、33c、33d)を形成するように整流板30が設置されているが、空間Bにおいても同様に、収納部22の段数に対応する数の流路、即ち、図1、図2においては4段なので4つの流路34(34a、34b、34c、34d)が整流板31によって形成される。整流板31の形状は整流板30と同様に熱処理装置1の角部に沿った形状であり、収納部22を通過した気体(熱風)が鉛直方向(図1内下方向)に向かうように流動させられる。 As described above, the rectifying plate 30 is installed so as to form the four flow paths 33 (33a, 33b, 33c, 33d) corresponding to the four-stage storage portions 22 in the space A. Similarly, the number of flow paths corresponding to the number of stages of the storage section 22, that is, four stages 34 (34 a, 34 b, 34 c, 34 d) are formed by the rectifying plate 31 because there are four stages in FIGS. . The shape of the rectifying plate 31 is a shape along the corner of the heat treatment apparatus 1 like the rectifying plate 30, and flows so that the gas (hot air) that has passed through the storage unit 22 is directed in the vertical direction (downward in FIG. 1). Be made.

また、図1および図2に示すように、複数の収納部22それぞれには、前後に引出し自在であり、熱処理装置1の正面から奥行き方向(図2左右方向)へ伸長する引出し式トレイ35(以下トレイ35とする)が設けられており、各トレイ35には1個以上のワーク15が収納され、複数のワーク15が一定間隔で収納されることが好ましい。また、各トレイ35の前端部、後端部にはそれぞれ前部断熱材36、後部断熱材37が施工されている。従って、トレイ35が収納部22内へ収納されている場合、前部断熱材36によって収納部22内は断熱状態となり、トレイ35が収納部22から引き出された場合(図2に示す上から1段目の状態)には、後部断熱材37によって収納部22内は断熱状態となる。即ち、トレイ35の収納時、引き出し時の両方の場合共に、収納部22(熱処理装置1)は断熱状態とされ、内部の熱が逃げにくい構成となっている。また、熱処理装置1内部が断熱状態であるため、内部温度が上昇しすぎる場合を考慮し、図1および図2に示すように熱処理装置1上部には熱を逃がすことが可能な開閉式の排熱ダクト39が設置されている。   Further, as shown in FIGS. 1 and 2, each of the plurality of storage units 22 can be pulled out in the front-rear direction, and can be pulled out in the depth direction (left-right direction in FIG. 2) from the front of the heat treatment apparatus 1. It is preferable that one or more workpieces 15 are stored in each tray 35, and a plurality of workpieces 15 are stored at regular intervals. Further, a front heat insulating material 36 and a rear heat insulating material 37 are respectively applied to the front end portion and the rear end portion of each tray 35. Therefore, when the tray 35 is stored in the storage unit 22, the inside of the storage unit 22 is thermally insulated by the front heat insulating material 36, and the tray 35 is pulled out from the storage unit 22 (from the top shown in FIG. 2). In the stage), the interior of the storage portion 22 is insulative with the rear heat insulating material 37. That is, in both cases when the tray 35 is stored and when it is pulled out, the storage unit 22 (heat treatment apparatus 1) is in a heat-insulating state, so that the internal heat is difficult to escape. Further, since the inside of the heat treatment apparatus 1 is insulative, considering the case where the internal temperature rises excessively, an open / close type exhaust that can release heat to the upper part of the heat treatment apparatus 1 as shown in FIG. 1 and FIG. A heat duct 39 is installed.

また、図3は、熱処理装置1の収納部22へのトレイ35の引き出しおよび収納や、ワーク15の収納および取り出しを行うアーム41を備える外部搬送機構40と、熱処理装置1から構成される熱処理設備50の概略説明図である。図3に示すように構成される熱処理設備50(熱処理装置1)において、加熱処理された高温のワーク15を均熱状態で保持する、熱処理が行われる。まず、外部搬送機構40のアーム41によって収納部22からトレイ35が引き出される。そして、外部搬送機構40によって、例えば熱間鍛造工程において高温状態となったワーク15が熱処理装置1のトレイ35に複数配置される。ワーク15がトレイ35に配置された後、外部搬送機構40によってトレイ35は収納部22へ収納される。熱処理装置1は断熱材9の施工された筐体10から構成されているため、熱処理装置1内は高温のワーク15自身の熱によって加熱され高温雰囲気下となる。   3 shows the heat treatment equipment comprising the external transfer mechanism 40 including the arm 41 for pulling out and storing the tray 35 in the storage unit 22 of the heat processing apparatus 1 and storing and taking out the work 15, and the heat processing apparatus 1. 50 is a schematic explanatory diagram of 50. FIG. In the heat treatment facility 50 (heat treatment apparatus 1) configured as shown in FIG. 3, heat treatment is performed to hold the heat-treated high-temperature work 15 in a soaking state. First, the tray 35 is pulled out from the storage unit 22 by the arm 41 of the external transport mechanism 40. Then, a plurality of workpieces 15 that are in a high temperature state, for example, in the hot forging process are arranged on the tray 35 of the heat treatment apparatus 1 by the external transport mechanism 40. After the work 15 is disposed on the tray 35, the tray 35 is stored in the storage unit 22 by the external transport mechanism 40. Since the heat treatment apparatus 1 is composed of the housing 10 on which the heat insulating material 9 is applied, the inside of the heat treatment apparatus 1 is heated by the heat of the high-temperature work 15 itself to be in a high temperature atmosphere.

次いで、熱処理装置1内においては、ワーク15を所定の時間一定の温度に均熱することによりその熱処理が行われるが、そのためには熱処理装置1内を常時一定の高温雰囲気下に保持する必要がある。これは、例えば鋼部品であるワーク15をオーステナイト状態で保持しておく焼きならしにより、所望の性質を持つ製品を得るためである。   Next, in the heat treatment apparatus 1, the heat treatment is performed by soaking the workpiece 15 at a constant temperature for a predetermined time. For this purpose, it is necessary to keep the heat treatment apparatus 1 in a constant high temperature atmosphere at all times. is there. This is because, for example, a product having a desired property is obtained by normalizing the workpiece 15 that is a steel part in an austenite state.

そこで、上述したようにワーク15自身の熱によって加熱された熱処理装置1内を一定の温度に保つため、加熱器24、ポンプ28および排熱ダクト39が備えられる。熱処理装置1内の温度が所望の温度より下がってしまった場合には、加熱器24の稼動によって熱処理装置1内の気体を加熱することで所望の温度に保つ。一方、熱処理装置1内の温度が所望の温度より上昇してしまった場合には、排熱ダクト39を開放するとともにポンプ28によって熱処理装置1内に大気(外気)を導入し、内部の熱を逃がすことで熱処理装置1内の温度を所望の温度に保つのである。ここで、鋼部品であるワーク15をオーステナイト状態で保持するために、均熱処理を行う温度は650℃前後が望ましい。 Therefore, as described above, the heater 24, the pump 28, and the exhaust heat duct 39 are provided in order to keep the inside of the heat treatment apparatus 1 heated by the heat of the workpiece 15 at a constant temperature. When the temperature in the heat treatment apparatus 1 has fallen below the desired temperature, the gas in the heat treatment apparatus 1 is heated by the operation of the heater 24 to maintain the desired temperature. On the other hand, when the temperature in the heat treatment apparatus 1 has risen above the desired temperature, the exhaust heat duct 39 is opened, and the atmosphere (outside air) is introduced into the heat treatment apparatus 1 by the pump 28, and the internal heat is reduced. By letting it escape, the temperature in the heat treatment apparatus 1 is maintained at a desired temperature. Here, in order to hold | maintain the workpiece | work 15 which is steel parts in an austenite state, the temperature which performs soaking | heat-treating is around 650 degreeC.

さらに、熱処理装置1内の加熱器24の側方近傍に設けられた循環ファン25の稼動により、熱処理装置1内の気体(通常は空気)は流動させられる。この熱処理装置1内の気体流動は、空間Aにおいて上述したような形状・構成を有する整流板30に整流され、流路33(33a、33b、33c、33d)を高温の気体が通過する。ここで、流路33(33a、33b、33c、33d)にはそれぞれ風量調節ダンパー29が設けられているため、収納棚20の各段への気体(熱風)の流入量は制御することが可能となっている。従って、この風量調節ダンパー29の制御により収納棚20の各段でのワーク15への均熱処理が均等に行われ、また、所定の温度での均熱処理が可能となる。そして、収納棚20の各段を該気体が通過した後、空間Bにおいて整流板34によって形成される流路34(34a、34b、34c、34d)を、それぞれ高温の気体が通過し、熱処理装置1内を高温の気体が循環流動することとなる。なお、収納棚20を通過後の気体(熱風)は流路34を通過した後、加熱器24内に吸引され、温度が所定値より低下した場合は再度加熱された後、再び循環ファン25によって空間Aへ送り出される。なお、前記気体は空気に限らず、例えば熱処理の必要に応じて不活性ガス等をポンプ28により外部から流入させ、不活性ガス雰囲気で熱処理を行ってもよい。   Furthermore, the gas (usually air) in the heat treatment apparatus 1 is caused to flow by the operation of the circulation fan 25 provided near the side of the heater 24 in the heat treatment apparatus 1. The gas flow in the heat treatment apparatus 1 is rectified in the space A by the rectifying plate 30 having the shape and configuration as described above, and high-temperature gas passes through the flow path 33 (33a, 33b, 33c, 33d). Here, since the flow rate adjustment dampers 29 are provided in the flow paths 33 (33a, 33b, 33c, 33d), the amount of gas (hot air) flowing into each stage of the storage shelf 20 can be controlled. It has become. Therefore, by the control of the air volume adjusting damper 29, the soaking process is uniformly performed on the work 15 at each stage of the storage shelf 20, and the soaking process at a predetermined temperature is possible. Then, after the gas passes through each stage of the storage shelf 20, the high-temperature gas passes through the flow paths 34 (34 a, 34 b, 34 c, 34 d) formed by the rectifying plates 34 in the space B, respectively, A high-temperature gas circulates and flows within 1. The gas (hot air) after passing through the storage shelf 20 passes through the flow path 34 and is then sucked into the heater 24. If the temperature falls below a predetermined value, it is heated again and then again by the circulation fan 25. It is sent out to space A. The gas is not limited to air, and for example, an inert gas or the like may be flowed in from the outside by a pump 28 as necessary for heat treatment, and heat treatment may be performed in an inert gas atmosphere.

各収納部22のトレイ35に収納された複数のワーク15は、熱処理装置1内が高温雰囲気下であり、さらにその内部の気体が各収納部22(収納棚20の各段)に均一に流動させられることにより、均一な温度でもって均熱状態で保持されることとなる。収納棚20に収納された複数のワーク15の均熱性が、高精度かつ安定的に保持されることにより、その熱処理によって製品としてのワークが安定して製造されることとなる。   The plurality of workpieces 15 stored in the trays 35 of the storage units 22 are in a high-temperature atmosphere in the heat treatment apparatus 1, and further, the gas therein flows uniformly to the storage units 22 (each stage of the storage shelf 20). As a result, the temperature is maintained at a uniform temperature at a uniform temperature. Since the thermal uniformity of the plurality of workpieces 15 stored in the storage shelf 20 is stably maintained with high accuracy, the workpieces as products are stably manufactured by the heat treatment.

以上、本発明の実施の形態の一例を説明したが、本発明は図示の形態に限定されない。当業者であれば、特許請求の範囲に記載された思想の範疇内において、各種の変更例または修正例に想到し得ることは明らかであり、それらについても当然に本発明の技術的範囲に属するものと了解される。   As mentioned above, although an example of embodiment of this invention was demonstrated, this invention is not limited to the form of illustration. It is obvious for those skilled in the art that various changes or modifications can be conceived within the scope of the idea described in the claims, and these naturally belong to the technical scope of the present invention. It is understood.

上記実施の形態では、ワーク15として鋼部品を例示し、その熱間鍛造後、焼きならしや焼鈍の処理を行う場合に用いる熱処理装置として熱処理装置1を説明したが、本発明はこれに限られるものではない。大気中や不活性ガス中などの雰囲気ガス中で熱処理を行うものであれば本熱処理装置を適用できる。例えば、アルミの熱処理を行うアルミ時効炉やセラミックス等の焼結を行う焼結炉など、連続的かつ高効率な熱処理工程を行うための様々な炉に用いることが可能である。   In the said embodiment, although the steel part was illustrated as the workpiece | work 15, and the heat processing apparatus 1 was demonstrated as a heat processing apparatus used when performing the process of normalization and annealing after the hot forging, this invention is limited to this. It is not something that can be done. The present heat treatment apparatus can be applied as long as heat treatment is performed in an atmospheric gas such as the atmosphere or an inert gas. For example, it can be used in various furnaces for performing a continuous and highly efficient heat treatment process such as an aluminum aging furnace for heat treatment of aluminum and a sintering furnace for sintering ceramics.

また、上記実施の形態にかかる熱処理装置1の構成としては、収納棚20、加熱器24および循環ファン25の配置を、図1に示すように加熱器24が収納棚20の下方にされ、循環ファン25が加熱器24の側方に配置されるものとしたが、本発明はこの構成に限られるものではない。そこで、以下に他の構成を有する熱処理装置について図面を参照して説明する。   Moreover, as a structure of the heat processing apparatus 1 concerning the said embodiment, as shown in FIG. 1, arrangement | positioning of the storage shelf 20, the heater 24, and the circulation fan 25 makes the heater 24 below the storage shelf 20, and circulates. Although the fan 25 is arranged on the side of the heater 24, the present invention is not limited to this configuration. Accordingly, a heat treatment apparatus having another configuration will be described below with reference to the drawings.

図4には、本発明の他の実施の形態にかかる熱処理装置60の正面断面図を示す。以下において、熱処理装置60の各構成要素は上記実施の形態の構成要素と同様であるため、同じ符号を用い、各構成要素の詳細な説明は省略する。熱処理装置60はその内部において、収納棚20が下方に配置され、収納棚20上方に加熱器24、加熱器24の側方に循環ファン25がそれぞれ配置されている。 In FIG. 4, front sectional drawing of the heat processing apparatus 60 concerning other embodiment of this invention is shown. In the following, since each component of the heat treatment apparatus 60 is the same as the component of the above-described embodiment, the same reference numerals are used and detailed description of each component is omitted. Inside the heat treatment apparatus 60, the storage shelf 20 is disposed below, the heater 24 is disposed above the storage shelf 20, and the circulation fan 25 is disposed on the side of the heater 24.

この熱処理装置60によれば、循環ファン25の稼動により内部の気体(空気)が循環させられる。ここで、一般的に、高温の空気はそれより温度の低い空気と比べ上方に溜まってしまうという性質があるが、熱処理装置60内部において高温の気体は循環ファン25によって熱処理装置60下方へと押し出されるように(図4中反時計回りに)循環させられているため、高温の気体が熱処理装置60の上方に溜まってしまうことなく均熱状態が担保される。即ち、熱処理装置60内部において各々場所の異なる複数の収納部22に収納されたワーク15が、高精度で全て同じ温度での均熱状態を保持することが比較的容易に可能となる。 According to this heat treatment apparatus 60, the internal gas (air) is circulated by the operation of the circulation fan 25. Here, in general, high-temperature air has a property that it accumulates upward as compared with air having a lower temperature than that, but high-temperature gas is pushed downward by the circulation fan 25 to the lower side of the heat-treatment device 60. Since it is circulated as shown in FIG. 4 (counterclockwise in FIG. 4), a soaking state is ensured without high-temperature gas accumulating above the heat treatment apparatus 60. In other words, it is relatively easy for the workpieces 15 housed in the plurality of housing portions 22 at different locations in the heat treatment apparatus 60 to maintain a soaking state at the same temperature with high accuracy.

また、図5には、上記実施の形態にかかる熱処理装置1を二台、即ち、熱処理装置1a、1bを用いた熱処理設備70の概略図を示す。ここで、熱処理設備70の外部搬送装置40’にはアーム41が複数設けられており、ワーク15を熱処理装置1aから熱処理装置1bに連続的に移動収納させることが可能となっている。なお、各熱処理装置1a、1bの構成要素については上記実施の形態で説明したものと同一であるため説明は省略する。 FIG. 5 shows a schematic diagram of a heat treatment facility 70 using two heat treatment apparatuses 1 according to the above embodiment, that is, the heat treatment apparatuses 1a and 1b. Here, the external transfer device 40 ′ of the heat treatment facility 70 is provided with a plurality of arms 41, and the workpiece 15 can be continuously moved and stored from the heat treatment device 1 a to the heat treatment device 1 b. In addition, since it is the same as that of what was demonstrated in the said embodiment about the component of each heat processing apparatus 1a, 1b, description is abbreviate | omitted.

例えば、鍛造のIA(恒温焼鈍)処理、焼き入れ焼き戻し処理、アルミの容体炉(溶体化処理)、時効炉を用いた処理(時効処理)等の2種以上の温度帯での均熱保持を必要とする処理を効率的に行う場合には、ワーク15には異なる温度域でもって連続的に均熱状態を保持させる必要がある。図5に示す熱処理設備70を用いた場合、異なる温度域で均熱保持されている熱処理装置1aと1bの間において、ワーク15を連続的に移動させることが可能となる。従って、ワーク15の均熱状態での保持を異なる温度域でもって安定して行うことができ、製品としてのワークが安定して生産されることとなる。 For example, forging IA (constant temperature annealing) treatment, quenching and tempering treatment, aluminum container furnace (solution treatment), treatment using an aging furnace (aging treatment), etc. In order to efficiently perform a process that requires heat treatment, it is necessary for the work 15 to continuously maintain a soaking state in different temperature ranges. When the heat treatment equipment 70 shown in FIG. 5 is used, the workpiece 15 can be continuously moved between the heat treatment apparatuses 1a and 1b that are maintained at a uniform temperature in different temperature ranges. Therefore, the work 15 can be stably held in a soaking state in different temperature ranges, and the work as a product is stably produced.

なお、本発明は上記図1、図4および図5に示した構成に限られるものではなく、ワーク15の材質や形状等によって均熱状態を効率よく担保できるように収納棚20、加熱器24、循環ファン25等の配置は適宜変更することが望ましく、また、熱処理の工程に必要とされる場合には熱処理装置1を複数設けてもよい。 The present invention is not limited to the configuration shown in FIGS. 1, 4, and 5. The storage shelf 20 and the heater 24 can be efficiently secured by the material and shape of the work 15. The arrangement of the circulation fan 25 and the like is preferably changed as appropriate, and a plurality of heat treatment apparatuses 1 may be provided if necessary for the heat treatment step.

また、以下には、図1および図5に記載した上記実施の形態にかかる熱処理装置、熱処理設備に準じた熱処理装置(設備)を用いて行う熱処理方法の一例について説明する。図6は5列8段の収納棚20’とそれに対応した40個のトレイ35を有する熱処理装置1a’、1b’を備える熱処理設備80の概略図である。ここでは、熱間鍛造により成形されたワーク15を650℃で約22分間の焼きならし処理を行う熱処理を例として説明する。 In addition, an example of a heat treatment method performed using the heat treatment apparatus (equipment) according to the heat treatment apparatus and the heat treatment equipment according to the embodiment described in FIGS. 1 and 5 will be described below. FIG. 6 is a schematic view of a heat treatment facility 80 including heat treatment apparatuses 1 a ′ and 1 b ′ having five rows and eight stages of storage shelves 20 ′ and 40 corresponding trays 35. Here, a heat treatment in which the work 15 formed by hot forging is subjected to a normalizing process at 650 ° C. for about 22 minutes will be described as an example.

まず、熱間鍛造により成形されたワーク15(ギア)を、ロボット(図示しない)の稼動により、外部搬送機構40’によって引き出された収納棚20の最上部左端の引き出し式トレイ35の上に搭載(収納)する。前記熱間鍛造においては約4秒に1個のペースでワーク15が連続的に成形され、それに応じてワーク15が前記ロボット(図示せず)により引き出し式トレイ35に順に搭載され、4個が一定間隔で収納される。熱間鍛造によって成形されたワーク15は、冷却工程を経ずに連続的に引き出し式トレイ35上に搭載するので、加熱された状態にある。また、熱処理装置内は予め加熱器により空気が加熱され、650℃に保持されており、循環ファンにより内部の空気が循環された状態にある。 First, the workpiece 15 (gear) formed by hot forging is mounted on the pull-out tray 35 at the uppermost left end of the storage shelf 20 pulled out by the external transport mechanism 40 ′ by operation of a robot (not shown). (Store). In the hot forging, the workpiece 15 is continuously formed at a pace of about 4 seconds, and the workpiece 15 is sequentially mounted on the pull-out tray 35 by the robot (not shown). Stored at regular intervals. Since the work 15 formed by hot forging is continuously mounted on the pull-out tray 35 without going through a cooling step, it is in a heated state. In the heat treatment apparatus, air is preliminarily heated by a heater and maintained at 650 ° C., and the internal air is circulated by a circulation fan.

次に、ワーク15が収納された引き出し式トレイ35を、外部搬送機構40’が押すことで、熱処理装置1a’の収納部22にトレイ35が収納される。続いて外部搬送機構40’によって、ワーク15を収納したトレイ35の下側のトレイ35(上から2段目、左端)を引き出す。この上に連続的に熱間鍛造され成形されたワーク15を前述と同様に4個搭載し収納部22にトレイ35を収納する。次に上から3段目、左端のトレイ35を引き出し、同様にワーク15を搭載する。図6に記載の熱処理装置1a’を正面から見た場合における左端の最上段のトレイ35から始まり、その下方のトレイ35にワーク15を収納してそのトレイ35を収納部22に収納することを繰り返し、左端最下段までワーク15をトレイ35に収納しそのトレイ35を収納部22に収納する。続いて熱処理装置1a’を正面から見た場合の左端から2番目の列の最上段のトレイ35から下方に向かって収納の工程を繰り返し、さらに順に右側の列のトレイ35にワーク15を収納する。以上を繰り返し、最後に右端の最下段(8段目)にワーク15をトレイ35に収納し、そのトレイ35を収納部22に収納するようにする。このようにして、熱処理装置1a’にワーク15が満載された状態となる。次に、熱処理装置1b’にも同様の方法でワーク15をトレイ35に搭載する。 Next, when the external transfer mechanism 40 ′ pushes the pull-out tray 35 in which the workpiece 15 is stored, the tray 35 is stored in the storage unit 22 of the heat treatment apparatus 1 a ′. Subsequently, the lower tray 35 (second stage from the top, left end) is pulled out by the external transport mechanism 40 '. Four pieces of workpieces 15 continuously hot forged and molded thereon are mounted in the same manner as described above, and the tray 35 is stored in the storage portion 22. Next, the tray 35 at the left end at the third level from the top is pulled out, and the work 15 is mounted in the same manner. Starting from the uppermost tray 35 at the left end when the heat treatment apparatus 1a ′ shown in FIG. 6 is viewed from the front, the work 15 is stored in the lower tray 35, and the tray 35 is stored in the storage unit 22. Repeatedly, the work 15 is stored in the tray 35 up to the lowest end of the left end, and the tray 35 is stored in the storage unit 22. Subsequently, the storage process is repeated downward from the uppermost tray 35 in the second row from the left end when the heat treatment apparatus 1a ′ is viewed from the front, and the workpieces 15 are sequentially stored in the trays 35 in the right row. . The above is repeated, and finally the work 15 is stored in the tray 35 in the lowermost stage (eighth stage) at the right end, and the tray 35 is stored in the storage unit 22. In this way, the workpiece 15 is fully loaded in the heat treatment apparatus 1a '. Next, the workpiece 15 is mounted on the tray 35 by the same method in the heat treatment apparatus 1b '.

熱処理装置1a’、1b’にワーク15が満載されたとき、すなわち合計80個のトレイ35に全てワーク15が搭載されたときに、最初に収納した熱処理装置1a’の左端最上段のトレイ35は約16秒×80個(トレイ35の全個数)=約1280秒(約22分)の均熱処理(焼きならし)、すなわち目的の時間熱処理が行われたことになる。この間、650℃の温度に熱処理装置内を保持するために、加熱器24や排熱ダクト39、外部からの空気の導入などで温度制御が行われる。また、図6中には図示していない整流板30、31を調整することでも収納棚20の各段における均熱が図られる。 When the workpieces 15 are fully loaded in the heat treatment apparatuses 1a ′ and 1b ′, that is, when all the workpieces 15 are mounted on the total of 80 trays 35, the uppermost tray 35 at the left end of the heat treatment apparatus 1a ′ stored first is About 16 seconds × 80 pieces (total number of trays 35) = about 1280 seconds (about 22 minutes) soaking (normalizing), that is, heat treatment for a target time. During this time, in order to keep the inside of the heat treatment apparatus at a temperature of 650 ° C., temperature control is performed by introducing the heater 24, the exhaust heat duct 39, air from the outside, or the like. Further, by adjusting the rectifying plates 30 and 31 (not shown in FIG. 6), soaking at each stage of the storage shelf 20 can be achieved.

次いで、最初に収納したトレイ35から順に外部搬送機構40’によりトレイ35引き出し、ワーク15を前記ロボット(図示せず)により取り出しワーク15の熱処理を終了した。さらに、連続的に熱間鍛造によりワーク15が新たに成形され、トレイ35上に搭載され、その後トレイ35を収納棚20に収納する。次いで2番目に収納したトレイ35を引き出しワーク15を取り出し、そのトレイ35に熱間鍛造で成形されたワーク15を搭載し、そのトレイ35を収納棚20に収納する。このような繰り返しにより、連続的にワーク15の熱処理が可能となる。 Next, the tray 35 was pulled out by the external transport mechanism 40 ′ in order from the tray 35 stored first, the workpiece 15 was taken out by the robot (not shown), and the heat treatment of the workpiece 15 was completed. Further, the workpiece 15 is newly formed continuously by hot forging and mounted on the tray 35, and then the tray 35 is stored in the storage shelf 20. Next, the second stored tray 35 is pulled out, the workpiece 15 is taken out, the workpiece 15 formed by hot forging is mounted on the tray 35, and the tray 35 is stored in the storage shelf 20. By repeating such a process, the workpiece 15 can be continuously heat-treated.

ここで、熱処理設備80においては、ワーク15の処理時間や生産数が変わっても、上述のトレイ35の数を変えることにより対処することができる。例えば、熱処理時間が約11分であれば、熱処理装置は一方のみ(1a’だけ(40トレイ))で連続処理が可能となり、熱処理装置のトレイ数や使用するトレイ数を変更することで、様々な処理時間に対応可能となる。なお、熱処理設備中のワーク15をトレイ35に入れる順番は任意でも構わない。また、熱処理装置の構造からわかる通り、連続処理が不要な場合は、バッチ炉的な処理も可能である。 Here, in the heat treatment facility 80, even if the processing time or the number of production of the workpieces 15 changes, it can be dealt with by changing the number of trays 35 described above. For example, if the heat treatment time is about 11 minutes, the heat treatment apparatus can perform continuous treatment only on one side (only 1a ′ (40 trays)), and by changing the number of trays and the number of trays used, various It is possible to cope with a long processing time. In addition, the order which puts the workpiece | work 15 in heat processing equipment into the tray 35 may be arbitrary. Further, as can be seen from the structure of the heat treatment apparatus, when a continuous treatment is not necessary, a batch furnace treatment is also possible.

また、ワーク15が熱間鍛造後の冷却工程を経ないで、連続的に熱処理装置1a’、1b’内に投入され、ワークの持つ熱を熱処理炉内の気体の加熱に利用できるため、エネルギーコストを大幅に削減でき、且つ一端室温まで冷却した場合と比べて大幅な処理時間の短縮が図られる。 Further, since the work 15 is continuously put into the heat treatment apparatuses 1a ′ and 1b ′ without passing through the cooling step after hot forging, the heat of the work can be used for heating the gas in the heat treatment furnace. The cost can be greatly reduced, and the processing time can be greatly shortened as compared with the case of cooling to room temperature.

本発明の実施例として、本発明にかかる熱処理装置において、加熱器により加熱された空気を熱処理装置内部で循環させ、熱処理装置内部の各位置での温度分布を測定した。図7は本実施例で用いた熱処理装置の正面断面図である。熱処理装置の構成要素については、上記実施の形態において説明したので省略する。   As an example of the present invention, in the heat treatment apparatus according to the present invention, the air heated by the heater was circulated inside the heat treatment apparatus, and the temperature distribution at each position inside the heat treatment apparatus was measured. FIG. 7 is a front sectional view of the heat treatment apparatus used in this example. Since the components of the heat treatment apparatus have been described in the above embodiment, a description thereof will be omitted.

熱処理装置の内部位置を以下の位置a〜iように定め、加熱器および循環ファンを稼動させ、到達設定温度を650℃としてそれぞれの位置における温度を測定した。なお、このときワークは投入しなかった。
a:収納棚下側部手前側(図7中左下手前)
b:収納棚下側部奥側(図7中左下奥)
c:収納棚上側部手前側(図7中左上手前)
d:収納棚上側部奥側(図7中左上奥)
e:収納棚下部中央手前側(図7中中央下部)
f:収納棚中央(図7中中央部)
g:収納棚下側部手前側(図7中右下手前)
h:収納棚中央側部(図7中右側中央)
i:収納棚上側部奥側(図7中右上奥)
The internal position of the heat treatment apparatus was determined as the following positions a to i, the heater and the circulation fan were operated, and the temperature at each position was measured at an ultimate set temperature of 650 ° C. At this time, no workpiece was introduced.
a: Storage shelf lower side near side (left lower front in FIG. 7)
b: Storage shelf bottom side back side (bottom left bottom in FIG. 7)
c: Upper side of storage shelf upper side (upper left of FIG. 7)
d: Upper side of storage shelf upper side (upper left in FIG. 7)
e: Lower front side of storage shelf (lower center in Fig. 7)
f: Center of storage shelf (center part in FIG. 7)
g: Storage shelf lower side near side (right lower right in FIG. 7)
h: Storage shelf center side (right center in FIG. 7)
i: Rear side of upper part of storage shelf (upper right in FIG. 7)

図8は上記位置a〜iでの温度変化を時間の経過に沿ってグラフ化したものである。図8によれば、各位置a〜iの温度変化はほぼ同じような推移をしていることが分かった。また、設定温度に到達してからは650℃±15℃の範囲に保持されていることが分かった。即ち、収納棚の各段・各列に設けられた収納部はほぼ均一な温度に保持され、収納部に配置されるワークについても、高精度で均熱状態が保持されることが分かった。   FIG. 8 is a graph showing the temperature change at the positions a to i as time elapses. According to FIG. 8, it was found that the temperature changes at the respective positions a to i have substantially the same transition. It was also found that the temperature was maintained in the range of 650 ° C. ± 15 ° C. after reaching the set temperature. That is, it has been found that the storage units provided in each stage and each row of the storage shelf are maintained at a substantially uniform temperature, and the work placed in the storage unit is also maintained in a soaking state with high accuracy.

本発明は、雰囲気中で焼鈍し、焼きならし等の熱処理を行う熱処理装置、熱処理設備および熱処理方法であって、例えば熱間鍛造等の加熱処理が行われた鋼部品などのワークに焼鈍し処理を行う熱処理装置、熱処理設備および熱処理方法に適用できる。   The present invention relates to a heat treatment apparatus, a heat treatment facility and a heat treatment method for performing heat treatment such as normalizing and annealing in an atmosphere, for example, annealing a workpiece such as a steel part subjected to heat treatment such as hot forging. It can be applied to a heat treatment apparatus, a heat treatment facility, and a heat treatment method for performing the treatment.

1、1a、1b、1a’、1b’、60…熱処理装置
9…断熱材
10…筐体
15…ワーク
20…ワーク収納棚(収納棚)
22…ワーク収納部(収納部)
24…加熱器
25…循環ファン
26…駆動機構
28…ポンプ
30、31…整流板
33、34…流路
35…引き出し式トレイ(トレイ)
36…前部断熱材
37…後部断熱材
39…排熱ダクト
40…外部搬送機構
41…アーム
50、70、80…熱処理設備
A、B…空間
DESCRIPTION OF SYMBOLS 1, 1a, 1b, 1a ', 1b', 60 ... Heat processing apparatus 9 ... Heat insulating material 10 ... Housing | casing 15 ... Work 20 ... Work storage shelf (storage shelf)
22 ... Work storage part (storage part)
DESCRIPTION OF SYMBOLS 24 ... Heater 25 ... Circulation fan 26 ... Drive mechanism 28 ... Pump 30, 31 ... Rectifying plate 33, 34 ... Flow path 35 ... Pull-out tray (tray)
36 ... Front heat insulating material 37 ... Rear heat insulating material 39 ... Exhaust heat duct 40 ... External transfer mechanism 41 ... Arm 50, 70, 80 ... Heat treatment equipment A, B ... Space

Claims (6)

ワークの熱処理を行う熱処理装置であって、
断熱材を備えた筐体と、
前記筐体内部に設けられる複数の収納段を有するワーク収納棚と、
前記ワーク収納棚の各収納段に設置される引出し式トレイと、
前記筐体の内部の気体を加熱する加熱器と、
前記筐体内部の気体を循環させる循環ファンと、を備える熱処理装置。
A heat treatment apparatus for heat treating a workpiece,
A housing with insulation,
A work storage shelf having a plurality of storage stages provided inside the housing;
A drawer-type tray installed in each storage stage of the work storage shelf;
A heater for heating the gas inside the housing;
A heat treatment apparatus comprising: a circulation fan that circulates the gas inside the housing.
前記収納段に流入する気体の流入側空間を1または複数の収納段ごとに複数の流路に分割する整流板と、
前記流路内に各収納段に対応して取り付けられる風量調整用ダンパーと、を備える請求項1に記載の熱処理装置。
A rectifying plate that divides the inflow side space of the gas flowing into the storage stage into a plurality of flow paths for each of one or a plurality of storage stages;
The heat treatment apparatus according to claim 1, further comprising an air volume adjusting damper attached to the flow path corresponding to each storage stage.
前記引出し式トレイの前端部および後端部に断熱材が備えられている、請求項1または2に記載の熱処理装置。 The heat processing apparatus of Claim 1 or 2 with which the heat insulating material is provided in the front-end part and rear-end part of the said drawer-type tray. 前記筐体内部に大気を導入する大気導入機構を備える、請求項1〜3のいずれかに記載の熱処理装置。 The heat processing apparatus in any one of Claims 1-3 provided with the air | atmosphere introduction mechanism which introduce | transduces air | atmosphere into the said housing | casing. ワークに熱処理を施す熱処理設備であって、
請求項1〜4のいずれかに記載の熱処理装置と、
前記熱処理装置の外部に設置されるワークを前記熱処理装置に搬入および搬出する搬送機構を備える、熱処理設備。
A heat treatment facility for heat treating the workpiece,
The heat treatment apparatus according to any one of claims 1 to 4,
A heat treatment facility comprising a transport mechanism for carrying a work installed outside the heat treatment apparatus into and out of the heat treatment apparatus.
請求項1〜4のいずれかに記載の熱処理装置を用いて、ワークに熱処理を施す熱処理方法であって、
使用する前記引出し式トレイの数を前記ワークの処理時間および前記ワークの生産数に応じて変化させる、熱処理方法。
A heat treatment method for performing heat treatment on a workpiece using the heat treatment apparatus according to claim 1,
A heat treatment method in which the number of drawer-type trays to be used is changed according to the processing time of the workpiece and the number of workpieces produced.
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CN102213544A (en) * 2011-05-10 2011-10-12 丽水市华一自动化技术有限公司 Tempering furnace
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