JP2012163231A - Rotary heat treatment furnace - Google Patents

Rotary heat treatment furnace Download PDF

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JP2012163231A
JP2012163231A JP2011022310A JP2011022310A JP2012163231A JP 2012163231 A JP2012163231 A JP 2012163231A JP 2011022310 A JP2011022310 A JP 2011022310A JP 2011022310 A JP2011022310 A JP 2011022310A JP 2012163231 A JP2012163231 A JP 2012163231A
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furnace body
opening
furnace
heat treatment
work
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Hidekane Hayashi
英謙 早矢仕
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Daido Steel Co Ltd
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Daido Steel Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide a rotary heat treatment furnace achieving miniaturization of a furnace body and improvement of heat efficiency.SOLUTION: The rotary heat treatment furnace includes: the furnace body 1 having a closed cylindrical shape; a rotational shaft 2 disposed in the center of the furnace body 1 in a vertical posture and rotated intermittently; a shelf plate 25 provided in a plurality of circumferential positions of the rotational shaft 2 and intermittently circling inside the furnace body 1 as the rotational shaft 2 is rotated; an opening 3 formed in the furnace body 1 in a point in a circumferential direction to carry a workpiece W outside the furnace body 1 from the shelf plate 25 located in a facing position and carry a new workpiece W on the shelf plate 25 from the outside of the furnace body 1; doors 41-44 for opening and closing the opening 3; and a heating heater 5 disposed along the inner peripheral of the furnace body 1 other than the opening 3.

Description

本発明は回転式熱処理炉に関し、特に、閉鎖された円筒状炉体内で間欠的に旋回移動させられるワークを、炉体内周に設けた加熱ヒータで加熱処理する回転式熱処理炉の構造改良に関する。   The present invention relates to a rotary heat treatment furnace, and more particularly, to a structure improvement of a rotary heat treatment furnace in which a workpiece that is intermittently swung in a closed cylindrical furnace body is heat-treated with a heater provided on the periphery of the furnace body.

特許文献１にこの種の回転式熱処理炉の一例が示されている。本文献１に示された熱処理炉では、閉鎖された円筒状の炉体を備え、当該炉体の中心に間欠的に回転させられる回転軸が垂直姿勢で設けられている。回転軸には上下に複数段でハンガが固定され、ハンガの周方向複数箇所には、ワークを吊り保持するためのフックが設けられている。フックに吊設されたワークは回転軸と一体に間欠的に旋回して、この間に炉体内周に沿って配設されたシーズヒータによって加熱される。炉体の外壁には直近位置に至ったフックにワークを吊設するために当該ワークを炉内へ搬入するための投入扉と、直近位置に至ったフックからワークを外して当該ワークを炉外へ搬出するための排出シャッターがそれぞれ設けられている。   Patent Document 1 shows an example of this type of rotary heat treatment furnace. The heat treatment furnace shown in Document 1 includes a closed cylindrical furnace body, and a rotating shaft that is intermittently rotated at the center of the furnace body is provided in a vertical posture. A hanger is fixed to the rotary shaft in a plurality of stages on the top and bottom, and hooks for holding and holding the workpiece are provided at a plurality of circumferential positions of the hanger. The work suspended from the hook is intermittently swung integrally with the rotating shaft, and is heated by a sheathed heater disposed along the periphery of the furnace body during this time. On the outer wall of the furnace body, in order to hang the work on the hook that has reached the nearest position, a loading door for carrying the work into the furnace, and the work is removed from the hook that has reached the nearest position. Each is provided with a discharge shutter for carrying it out.

特開平５−１８０５６８JP-A-5-180568

しかし、上記従来の回転式熱処理炉では、ワークを炉内へ搬入するための搬入口とワークを炉外へ搬出するための搬出口がそれぞれ設けられている。この場合、搬入口や搬出口には加熱ヒータが設置できないため、必要長さの加熱工程を確保するためには炉体の周方向長を長くする必要があって炉の外形が大きくなるという問題があった。また、搬入口や搬出口の扉体はその重量を抑えてスムーズな開閉を可能にするために扉内の断熱材の厚みが薄くなり勝ちであるとともに、扉体のシール部からの外気流入があるため、熱効率が悪いという問題もあった。   However, the conventional rotary heat treatment furnace is provided with a carry-in port for carrying the work into the furnace and a carry-out port for carrying the work out of the furnace. In this case, since a heater cannot be installed at the carry-in port or the carry-out port, it is necessary to increase the circumferential length of the furnace body in order to ensure the heating process of the required length, and the outer shape of the furnace becomes large. was there. In addition, the thickness of the heat insulating material in the door tends to decrease in order to reduce the weight of the door body at the entrance and the exit and enable smooth opening and closing, and the outside air inflow from the seal part of the door body Therefore, there was a problem that the thermal efficiency was poor.

そこで、本発明はこのような課題を解決するもので、炉体の小型化と熱効率の向上を実現した回転式熱処理炉を提供することを目的とする。   Therefore, the present invention solves such problems, and an object of the present invention is to provide a rotary heat treatment furnace that realizes downsizing of the furnace body and improvement of thermal efficiency.

上記課題を解決するために、本第１発明では、閉鎖された円筒状の炉体（１）と、当該炉体（１）の中心に垂直姿勢で設けられて間欠的に回転させられる回転軸（２）と、当該回転軸（２）の周方向の複数位置に設けられて前記回転軸（２）の回転とともに炉体（１）内を間欠的に旋回移動するワーク保持部（２５）と、前記周方向の一箇所で前記炉体（１）に設けられ、対面位置に至った前記ワーク保持部（２５）から前記炉体（１）外へワーク（Ｗ）を搬出するとともに新たなワーク（Ｗ）を炉体（１）外から前記ワーク保持部（２５）へ搬入するための開口（３）と、当該開口（３）を開閉するための扉体（４１〜４４）と、前記開口（３）を除く前記炉体（１）の内周に沿って配設された加熱ヒータ（５）とを備えている。   In order to solve the above problems, in the first invention, a closed cylindrical furnace body (1) and a rotating shaft provided in a vertical posture at the center of the furnace body (1) and rotated intermittently. (2) and a work holding part (25) provided at a plurality of positions in the circumferential direction of the rotating shaft (2) and intermittently swiveling in the furnace body (1) along with the rotation of the rotating shaft (2). The workpiece (W) is provided to the furnace body (1) at one place in the circumferential direction, and the workpiece (W) is carried out of the furnace body (1) from the workpiece holding section (25) reaching the facing position, and a new workpiece An opening (3) for carrying (W) from the outside of the furnace body (1) to the work holding part (25), a door body (41 to 44) for opening and closing the opening (3), and the opening A heater (5) disposed along the inner periphery of the furnace body (1) except (3).

本第１発明においては、ワークの炉内への搬入と炉外への搬出を一つの開口で行っているから加熱ヒータが設置できない領域を最小限に抑えることができ、炉体の周壁内周に設置される加熱ヒータの必要周方向長をコンパクトな炉体外形で確保することができる。また、断熱材の厚みが薄い扉体を周方向の一箇所に設けるだけで良く、扉体シール部からの外気流入も必要最小限に抑えられるから熱効率を大きく向上させることができる。   In the first invention, since the work is carried into and out of the furnace with one opening, the area where the heater cannot be installed can be minimized, and the inner peripheral wall of the furnace body The required circumferential direction length of the heater installed in can be ensured with a compact furnace body outer shape. Moreover, it is only necessary to provide the door body with a thin thickness of the heat insulating material at one place in the circumferential direction, and since the inflow of outside air from the door body seal portion can be minimized, the thermal efficiency can be greatly improved.

本第２発明では、前記ワーク保持部（２５）は前記複数位置において前記回転軸（２）の軸方向たる上下方向へ複数段で設けられており、前記開口（３）は前記ワーク保持部（２５）の少なくとも一つに対応させて上下方向へ複数に分割されて、分割された開口部（３１〜３４）にそれぞれ扉体（４１〜４４）が設けられている。   In the second aspect of the invention, the work holding part (25) is provided in a plurality of stages in the vertical direction, which is the axial direction of the rotating shaft (2), at the plurality of positions, and the opening (3) is provided with the work holding part ( 25) is divided into a plurality of portions in the vertical direction, and doors (41 to 44) are provided in the divided openings (31 to 34), respectively.

本第２発明においては、扉体を、開口を上下方向に区画した各開口部のそれぞれを開閉する小型のものにできるから、ワークの搬入・搬出に必要な最小限の開口を開放するだけで良く、これによって、さらに熱効率を向上させることができる。   In the second aspect of the invention, the door body can be made small so as to open and close each of the openings whose openings are partitioned in the vertical direction. Therefore, it is only necessary to open the minimum opening necessary for loading and unloading the workpiece. Well, this can further improve the thermal efficiency.

上記カッコ内の符号は、後述する実施形態に記載の具体的手段との対応関係を示すものである。   The reference numerals in the parentheses indicate the correspondence with specific means described in the embodiments described later.

本発明の回転式熱処理炉によれば、炉体の小型化と熱効率の向上を実現することができる。   According to the rotary heat treatment furnace of the present invention, downsizing of the furnace body and improvement in thermal efficiency can be realized.

本発明の一実施形態における、回転式熱処理炉の垂直断面図である。It is a vertical sectional view of a rotary heat treatment furnace in one embodiment of the present invention. 図１のII−II線に沿った水平断面図である。FIG. 2 is a horizontal sectional view taken along line II-II in FIG. 1. 従来例を示す回転式熱処理炉の水平断面図である。It is a horizontal sectional view of a rotary heat treatment furnace showing a conventional example.

図１には本実施形態における回転式熱処理炉の垂直断面図を示し、図２には図１のII−II線に沿った水平断面図を示す。回転式熱処理炉は閉鎖された円筒状の炉体１を備えており、炉体１の底壁１１、頂壁１２、および周壁１３は所定厚の断熱材で主に構成されている。底壁１１は下面の外周縁の複数個所が架台１４に載置されており、架台１４で囲まれた空間内には、駆動機構を収納したケーシング１５が配設されている。   FIG. 1 shows a vertical sectional view of a rotary heat treatment furnace in the present embodiment, and FIG. 2 shows a horizontal sectional view taken along line II-II in FIG. The rotary heat treatment furnace includes a closed cylindrical furnace body 1, and the bottom wall 11, the top wall 12, and the peripheral wall 13 of the furnace body 1 are mainly composed of a heat insulating material having a predetermined thickness. A plurality of locations on the outer peripheral edge of the bottom surface of the bottom wall 11 are placed on a gantry 14, and a casing 15 containing a drive mechanism is disposed in a space surrounded by the gantry 14.

炉体１の中心には上下方向へ垂直姿勢で回転軸２が設けられており、回転軸２の上端部２１は頂壁１２を上方へ貫通してその上端は頂壁１２上に設けた軸受け部材１６に当接し支持されている。回転軸２の下端部２２は底壁１１を下方へ貫通してケーシング１５内に挿入されており、ケーシング１５内に位置する回転軸２の下端（図示略）には駆動機構を構成する大径歯車が装着されて、当該歯車の外周に噛合する小径歯車を介して駆動モータに連結されている。駆動モータは一定時間間隔で間欠的に駆動されて、回転軸２を、後述する所定角度毎に間欠的に回転させる。   A rotary shaft 2 is provided in the center of the furnace body 1 in a vertical posture in the vertical direction. An upper end portion 21 of the rotary shaft 2 penetrates the top wall 12 upward and a bearing provided on the top wall 12 at the upper end. Abutting on and supported by the member 16. The lower end 22 of the rotating shaft 2 penetrates the bottom wall 11 downward and is inserted into the casing 15, and the lower end (not shown) of the rotating shaft 2 located in the casing 15 has a large diameter that constitutes a drive mechanism. A gear is mounted and connected to the drive motor via a small-diameter gear that meshes with the outer periphery of the gear. The drive motor is intermittently driven at regular time intervals to rotate the rotating shaft 2 intermittently at predetermined angles described later.

炉体１内に位置する回転軸２の下端部２２外周と頂壁１２に近い上端部２１外周にはそれぞれ同径の円形端板２３が固定されている。回転軸２の周囲にはこれと同心状に円筒形の支持体２４が配設されて、支持体２４の上下の開口縁が上下の端板２３の外周に固定されている。支持体２４の外周には上下方向へ間隔を置いて複数の円環状の、ワーク保持部としての棚板２５（図２）が嵌着されている。   A circular end plate 23 having the same diameter is fixed to the outer periphery of the lower end portion 22 of the rotary shaft 2 located in the furnace body 1 and the outer periphery of the upper end portion 21 close to the top wall 12. A cylindrical support 24 is disposed around the rotary shaft 2 concentrically with the rotary shaft 2, and upper and lower opening edges of the support 24 are fixed to the outer periphery of the upper and lower end plates 23. A plurality of annular shelf plates 25 (FIG. 2) as work holding portions are fitted on the outer periphery of the support 24 at intervals in the vertical direction.

棚板２５は本実施形態では上下に１２段設けられており、これら棚板２５は三段づつが互いに近接して群Ａ〜Ｄをなしている。各棚板２５にはその周方向へほぼ等間隔で複数のワークＷが載置されている。ワークＷは本実施形態ではリング状のもので、各棚板２５に周方向へほぼ３６度の等角度間隔で１０個のワークＷが、上下の各棚板２５で同一位置に載置されている。   In the present embodiment, the shelf boards 25 are provided in 12 stages in the vertical direction, and these shelf boards 25 form groups A to D in close proximity to each other in three stages. A plurality of workpieces W are placed on each shelf plate 25 at substantially equal intervals in the circumferential direction. In this embodiment, the workpieces W are ring-shaped, and ten workpieces W are placed on the respective shelf plates 25 at the same position on the upper and lower shelf plates 25 at equal angular intervals of approximately 36 degrees in the circumferential direction. Yes.

炉体１には周方向の一箇所に縦長の開口３が設けられている。開口３は上記棚板群Ａ〜Ｄに対応させて上下方向へ四段に区画されており、区画された各開口部３１，３２，３３、３４にそれぞれこれを開閉する扉体４１，４２，４３，４４が設けられている。これら扉体４１〜４４には断熱材が内設されるとともに、扉体４１〜４４は図略の開閉駆動機構によって、後述するロボットアームと連動して側縁ヒンジ部４５（図２）を中心に外方へ自動開閉させられる。   The furnace body 1 is provided with a vertically long opening 3 at one place in the circumferential direction. The opening 3 is divided into four stages in the vertical direction corresponding to the shelf groups A to D, and door bodies 41, 42, which open and close the openings 31, 32, 33, 34 respectively. 43 and 44 are provided. The door bodies 41 to 44 are provided with a heat insulating material, and the door bodies 41 to 44 are centered on the side edge hinge portion 45 (FIG. 2) in conjunction with a robot arm to be described later by an unillustrated opening / closing drive mechanism. Can be opened and closed automatically.

前述したように回転軸２は一定時間間隔（例えば１２０秒）で間欠的にほぼ角度３６度毎に回転させられており、各棚板２５も回転軸２と一体に旋回して、周方向で同一位置に載置された各棚板群Ａ〜ＤのワークＷが図１に示すように開口３に対面する位置に間欠的に到達する。炉体１の周壁１３内周には、開口３の形成部分を除いて周壁１３内周に沿ってシーズヒータ等の加熱ヒータ５が設けられている。   As described above, the rotating shaft 2 is intermittently rotated at an angle of 36 degrees at a constant time interval (for example, 120 seconds), and each shelf plate 25 is also rotated integrally with the rotating shaft 2 in the circumferential direction. The workpieces W of the respective shelf groups A to D placed at the same position intermittently reach the position facing the opening 3 as shown in FIG. A heater 5 such as a sheathed heater is provided on the inner periphery of the peripheral wall 13 of the furnace body 1 along the inner periphery of the peripheral wall 13 except for the portion where the opening 3 is formed.

上記構造の回転式熱処理炉において、全ての棚板２５上にワークＷが載っている定常操業時において、炉内を間欠的に旋回移動しつつ加熱処理されたワークＷが開口３に対面する位置に至ると、棚板群Ａに対応する扉体４１が開放されて（図１の鎖線）、ロボットアーム６が開口部３１から炉内に進入して棚板群Ａの最上位置の棚板２５上にあるワークＷを把持フィンガ６１で掴んで炉外へ搬出する。この後、ロボットアーム６は新たなワークＷを掴んで開口部３１より再び炉内に進入し、空になった最上位置の棚板２５上に新たなワークＷを載置搬入するとともに、続いてその直下の棚板２５上にあるワークＷを把持フィンガ６１で掴んで炉外へ搬出する。   In the rotary heat treatment furnace having the above structure, at the time of steady operation in which the work W is placed on all the shelf plates 25, the position where the work W which is heat-treated while turning in the furnace intermittently faces the opening 3 , The door body 41 corresponding to the shelf group A is opened (chain line in FIG. 1), the robot arm 6 enters the furnace through the opening 31 and the shelf 25 at the uppermost position of the shelf group A. The workpiece W on the top is gripped by the gripping fingers 61 and carried out of the furnace. Thereafter, the robot arm 6 grasps a new work W and enters the furnace again through the opening 31 to place and load the new work W on the empty shelf 25 at the uppermost position. The workpiece W on the shelf plate 25 immediately below is gripped by the gripping fingers 61 and carried out of the furnace.

以下、各棚板群Ａ〜Ｄに対応した扉体４１〜４４を順次択一的に開放させて各開口部３１〜３４から、上記と同様の手順で、新たなワークＷを棚板２５上に載置するとともにその直下の棚板２５上の、加熱処理を終えたワークＷを炉外へ取り出す。この過程は回転軸２が停止している時間内に、棚板群Ｄの最下段の棚板２５上へ新たなワークＷを載置するまで続けられる。扉体４４を閉鎖した後、一定時間の経過によって回転軸が回転して、熱処理を終えたワークＷが開口３に至ると、再び扉体４１〜４４が順次択一的開放されて上述の手順で開口部３１〜３４を経てワークＷの搬入および搬出が行われる。   Thereafter, doors 41 to 44 corresponding to the respective shelf groups A to D are selectively opened sequentially, and new workpieces W are placed on the shelf 25 from the openings 31 to 34 in the same procedure as described above. And the work W on the shelf plate 25 immediately after the heat treatment is taken out of the furnace. This process is continued until a new workpiece W is placed on the bottom shelf 25 of the shelf group D within the time when the rotating shaft 2 is stopped. After the door 44 is closed, the rotating shaft rotates after a certain period of time, and when the heat-treated workpiece W reaches the opening 3, the doors 41 to 44 are alternately opened again and the above procedure is performed. Then, the work W is carried in and out through the openings 31 to 34.

このような本実施形態の回転式熱処理炉によれば、ワークＷの炉内への搬入と炉外への搬出を一つの開口３で行っているから加熱ヒータ５が設置できない領域を最小限に抑えることができ、炉体１の周壁１３内周に設置される加熱ヒータ５の必要周方向長Ｌ（図２）をコンパクトな炉体外形で確保することができる。これに対して炉体１´にワークＷの搬入口１８と搬出口１７をそれぞれ設けた図３に示す従来の回転式熱処理炉では、加熱ヒータ５の必要周方向長Ｌを確保するためには炉体１´の外形を大きくする必要がある。   According to the rotary heat treatment furnace of this embodiment, since the work W is carried into and out of the furnace through the single opening 3, the area where the heater 5 cannot be installed is minimized. The required circumferential direction length L (FIG. 2) of the heater 5 installed on the inner periphery of the peripheral wall 13 of the furnace body 1 can be ensured with a compact furnace body outer shape. On the other hand, in the conventional rotary heat treatment furnace shown in FIG. 3 in which the furnace body 1 ′ is provided with the carry-in port 18 and the carry-out port 17 of the work W, in order to ensure the necessary circumferential length L of the heater 5. It is necessary to increase the outer shape of the furnace body 1 '.

また、本実施形態の回転式熱処理炉では、断熱材の厚みが薄い扉体４１〜４４を周方向の一箇所に設けるだけで良く、扉体シール部からの外気流入も必要最小限に抑えられるから熱効率を大きく向上させることができる。そして、本実施形態では、扉体４１〜４４を、開口３全体を開閉する大型のものとせず、開口３を上下方向に区画した各開口部３１〜３４のそれぞれを開閉する小型のものにして、ワークの搬入・搬出に必要な最小限の開口を開放するようにしているから、さらに熱効率を向上させることができる。   Further, in the rotary heat treatment furnace of the present embodiment, it is only necessary to provide the door bodies 41 to 44 having a thin heat insulating material at one place in the circumferential direction, and the inflow of outside air from the door body seal portion can be suppressed to the minimum necessary. Therefore, the thermal efficiency can be greatly improved. In the present embodiment, the door bodies 41 to 44 are not large-sized ones that open and close the entire opening 3, but small ones that open and close each of the openings 31 to 34 that divide the opening 3 in the vertical direction. Since the minimum opening necessary for loading and unloading the workpiece is opened, the thermal efficiency can be further improved.

１…炉体、２…回転軸、２５…棚板（ワーク保持部）、３…開口、３１〜３４…開口部、４１〜４４…扉体、５…加熱ヒータ、Ｗ…ワーク。 DESCRIPTION OF SYMBOLS 1 ... Furnace body, 2 ... Rotating shaft, 25 ... Shelf board (work holding | maintenance part), 3 ... Opening, 31-34 ... Opening part, 41-44 ... Door body, 5 ... Heating heater, W ... Workpiece | work.

Claims (2)

閉鎖された円筒状の炉体と、当該炉体の中心に垂直姿勢で設けられて間欠的に回転させられる回転軸と、当該回転軸の周方向の複数位置に設けられて前記回転軸の回転とともに炉体内を間欠的に旋回移動するワーク保持部と、前記周方向の一箇所で前記炉体に設けられ、対面位置に至った前記ワーク保持部から前記炉体外へワークを搬出するとともに新たなワークを炉体外から前記ワーク保持部へ搬入するための開口と、当該開口を開閉するための扉体と、前記開口を除く前記炉体の内周に沿って配設された加熱ヒータとを備える回転式熱処理炉。 A closed cylindrical furnace body, a rotation shaft provided in a vertical posture at the center of the furnace body and rotated intermittently, and rotation of the rotation shaft provided at a plurality of positions in the circumferential direction of the rotation shaft In addition, a work holding unit that pivots and moves intermittently in the furnace body, and a work holding unit that is provided in the furnace body at one place in the circumferential direction and that carries the work out of the furnace body from the work holding part that has reached the facing position. An opening for carrying a work from outside the furnace body to the work holding unit, a door body for opening and closing the opening, and a heater disposed along the inner periphery of the furnace body excluding the opening Rotary heat treatment furnace. 前記ワーク保持部は前記複数位置において前記回転軸の軸方向たる上下方向へ複数段で設けられており、前記開口は前記ワーク保持部の少なくとも一つに対応させて上下方向へ複数に分割されて、分割された開口部にそれぞれ扉体が設けられている請求項１に記載の回転式熱処理炉。 The workpiece holding portion is provided in a plurality of stages in the vertical direction, which is the axial direction of the rotation shaft, at the plurality of positions, and the opening is divided into a plurality of vertical directions corresponding to at least one of the workpiece holding portions. The rotary heat treatment furnace according to claim 1, wherein a door is provided in each of the divided openings.
JP2011022310A 2011-02-04 2011-02-04 Rotary heat treatment furnace Pending JP2012163231A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101733066B1 (en) 2016-07-05 2017-05-08 주식회사 에이-프로 Armature of the motor as heat treatment
KR20180042501A (en) * 2016-10-17 2018-04-26 주식회사 포스코 Heat treatment apparatus
JP2019128113A (en) * 2018-01-25 2019-08-01 大同特殊鋼株式会社 Heat treatment furnace
CN116121504A (en) * 2023-02-21 2023-05-16 北京中孚悦达真空科技有限公司 Vertical vacuum water quenching furnace

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Publication number Priority date Publication date Assignee Title
JPH0250080A (en) * 1988-05-31 1990-02-20 Fuaanesu Juko Kk Furnace
JPH05180568A (en) * 1992-01-06 1993-07-23 Hitachi Cable Ltd Device for automatic heat treatment
JPH08119748A (en) * 1994-10-24 1996-05-14 Kyocera Corp Device for removing binder from ceramic molded product
JP2008138916A (en) * 2006-11-30 2008-06-19 Furness Juko Kk Hot air circulation furnace
JP2010196152A (en) * 2009-02-27 2010-09-09 Daihatsu Motor Co Ltd Heat treating method

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0250080A (en) * 1988-05-31 1990-02-20 Fuaanesu Juko Kk Furnace
JPH05180568A (en) * 1992-01-06 1993-07-23 Hitachi Cable Ltd Device for automatic heat treatment
JPH08119748A (en) * 1994-10-24 1996-05-14 Kyocera Corp Device for removing binder from ceramic molded product
JP2008138916A (en) * 2006-11-30 2008-06-19 Furness Juko Kk Hot air circulation furnace
JP2010196152A (en) * 2009-02-27 2010-09-09 Daihatsu Motor Co Ltd Heat treating method

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101733066B1 (en) 2016-07-05 2017-05-08 주식회사 에이-프로 Armature of the motor as heat treatment
KR20180042501A (en) * 2016-10-17 2018-04-26 주식회사 포스코 Heat treatment apparatus
KR101867695B1 (en) 2016-10-17 2018-06-15 주식회사 포스코 Heat treatment apparatus
JP2019128113A (en) * 2018-01-25 2019-08-01 大同特殊鋼株式会社 Heat treatment furnace
CN116121504A (en) * 2023-02-21 2023-05-16 北京中孚悦达真空科技有限公司 Vertical vacuum water quenching furnace
CN116121504B (en) * 2023-02-21 2023-09-22 北京中孚悦达真空科技有限公司 Vertical vacuum water quenching furnace

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