JP6641117B2 - Cooling device, heat treatment device, heat treatment method - Google Patents

Cooling device, heat treatment device, heat treatment method Download PDF

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JP6641117B2
JP6641117B2 JP2015155356A JP2015155356A JP6641117B2 JP 6641117 B2 JP6641117 B2 JP 6641117B2 JP 2015155356 A JP2015155356 A JP 2015155356A JP 2015155356 A JP2015155356 A JP 2015155356A JP 6641117 B2 JP6641117 B2 JP 6641117B2
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work
jacket
peripheral surface
annular portion
annular
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JP2017031491A (en
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光輝 西岡
光輝 西岡
清澤　裕
裕 清澤
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Neturen Co Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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Description

本発明は、環状部を有するワークの熱処理に用いられる冷却装置及び熱処理装置、並びに環状部を有するワークの熱処理方法に関する。   The present invention relates to a cooling device and a heat treatment apparatus used for heat treatment of a work having an annular portion, and a heat treatment method for a work having an annular portion.

特許文献１に記載された冷却装置は、環状（筒状）ワークを支持する支持部と、環状ワークの内側に配置されるジャケット部と、支持部及びジャケット部を環状ワークの中心軸まわりに一体に回転させる回転手段とを備え、ジャケット部の外周面には、冷却液の噴射口が周方向及び中心軸方向に間隔をあけて複数設けられている。   The cooling device described in Patent Literature 1 has a support portion that supports an annular (cylindrical) work, a jacket portion disposed inside the annular work, and the support portion and the jacket portion integrated around a central axis of the annular work. And a plurality of cooling liquid injection ports are provided on the outer peripheral surface of the jacket portion at intervals in the circumferential direction and the central axis direction.

回転手段によって支持部及びジャケット部並びに支持部に支持された環状ワークが回転されながら、環状ワークの外周を囲む誘導加熱コイルによって環状ワークの外周面が誘導加熱される。併せて、ジャケット部の各噴射口から冷却液が噴射され、環状ワークの内周面が冷却される。これにより、環状ワークのズブ焼入、即ち周壁の肉厚全体に焼きが入ることが防止される。   The outer peripheral surface of the annular work is induction-heated by the induction heating coil surrounding the outer periphery of the annular work while the support section, the jacket section, and the annular work supported by the support section are rotated by the rotating means. At the same time, a cooling liquid is injected from each injection port of the jacket portion to cool the inner peripheral surface of the annular work. This prevents sub-hardening of the annular work, that is, hardening of the entire thickness of the peripheral wall.

特開平８−１２０３２９号公報JP-A-8-120329

特許文献１に記載された冷却装置では、ジャケット部と環状ワークとが一体に回転され、ジャケット部の外周面に設けられた各噴射口から噴射される冷却液は、環状ワークの内周面の同じ箇所にかかることになる。このため、環状ワークの内周面において冷却ムラが生じ、冷却ムラに起因して割れや歪が発生する虞がある。   In the cooling device described in Patent Literature 1, the jacket portion and the annular work are rotated integrally, and the cooling liquid injected from each injection port provided on the outer peripheral surface of the jacket portion is formed on the inner peripheral surface of the annular work. It will take the same place. For this reason, cooling unevenness occurs on the inner peripheral surface of the annular work, and there is a possibility that cracks and distortions may occur due to the cooling unevenness.

本発明は、上述した事情に鑑みなされたものであり、ワークの環状部に対する熱処理において、環状部の内周面を均一に冷却して熱処理品質を高めることを目的としている。   The present invention has been made in view of the above circumstances, and has as its object to improve the heat treatment quality by uniformly cooling the inner peripheral surface of the annular portion in the heat treatment of the annular portion of the work.

本発明の一態様の冷却装置は、環状部を有するワークを支持する支持部と、前記ワークの前記環状部の内側に配置され、前記環状部の内周面に冷却液をかけるジャケット部と、前記ワークの前記環状部と同軸の回転軸まわりに前記支持部及び前記ジャケット部を一体に回転可能に支持する回転軸部と、を備え、前記ワークの前記環状部の内周面に対向する前記ジャケット部の外周面に、前記冷却液を噴射するスリットが全周に亘って連続して設けられており、前記ジャケット部は、前記スリットと全周に亘って連通する環状の液溜め部をさらに有する。 A cooling device according to one embodiment of the present invention includes a support portion that supports a work having an annular portion, a jacket portion that is disposed inside the annular portion of the work, and that applies a coolant to an inner peripheral surface of the annular portion, A rotating shaft portion that supports the support portion and the jacket portion so as to be integrally rotatable around a rotation axis that is coaxial with the annular portion of the work, wherein the work portion faces the inner peripheral surface of the annular portion of the work. On the outer peripheral surface of the jacket portion, a slit for injecting the cooling liquid is provided continuously over the entire circumference, and the jacket portion further includes an annular liquid reservoir communicating with the slit over the entire circumference. Have .

また、本発明の一態様の熱処理装置は、前記冷却装置を含んで前記ワークを保持し、前記ワーク及び前記冷却装置の前記ジャケット部を一体に回転させる回転駆動部と、前記ワークの前記環状部の外周を囲む誘導加熱コイルと、を備え、前記回転駆動部によって前記ワークと前記冷却装置の前記ジャケット部とを回転させながら、前記誘導加熱コイルによって前記ワークの前記環状部の外周面を誘導加熱し、且つ前記ジャケット部の前記スリットから冷却液を噴射して前記環状部の内周面を冷却する。   In addition, the heat treatment apparatus according to one aspect of the present invention includes a rotation driving unit that holds the work including the cooling device, and integrally rotates the work and the jacket portion of the cooling device, and the annular portion of the work. An induction heating coil surrounding the outer periphery of the work, and the induction heating coil induction-heats the outer peripheral surface of the annular portion of the work while the work and the jacket of the cooling device are rotated by the rotation drive unit. The cooling liquid is sprayed from the slit of the jacket portion to cool the inner peripheral surface of the annular portion.

また、本発明の一態様の熱処理方法は、ワークの環状部の内側に、外周面に全周に亘って連続するスリットが設けられ且つ前記スリットと全周に亘って連通する環状の液溜め部を有する冷却ジャケットを配置し、前記ワーク及び前記冷却ジャケットを、前記ワークの前記環状部の中心軸まわりに一体に回転させながら、前記環状部の外周面を誘導加熱し、且つ前記冷却ジャケットの前記スリットから冷却液を噴射して前記環状部の内周面を冷却する。 Further, in the heat treatment method according to one aspect of the present invention, in the annular portion of the work, an annular liquid reservoir may be provided in which an outer peripheral surface is provided with a slit that is continuous over the entire circumference and communicates with the slit over the entire circumference. Disposing a cooling jacket having an outer peripheral surface of the annular portion while rotating the work and the cooling jacket integrally around a central axis of the annular portion of the work; and Cooling liquid is injected from the slit to cool the inner peripheral surface of the annular portion.

本発明によれば、ワークの環状部に対する熱処理において、環状部の内周面を均一に冷却して熱処理品質を高めることができる。   ADVANTAGE OF THE INVENTION According to this invention, in the heat treatment with respect to the annular part of a workpiece | work, the inner peripheral surface of an annular part can be cooled uniformly and heat treatment quality can be improved.

本発明の実施形態を説明するための、冷却装置及び熱処理装置の一例を示す縦断面図である。It is a longitudinal section showing an example of a cooling device and a heat treatment device for explaining an embodiment of the present invention. 図１の冷却装置のジャケット部の横断面図である。FIG. 2 is a cross-sectional view of a jacket of the cooling device of FIG. 1.

図１及び図２は、本発明の実施形態を説明するための、冷却装置及び熱処理装置の一例を示す。   1 and 2 show an example of a cooling device and a heat treatment device for explaining an embodiment of the present invention.

熱処理装置１は、環状部３を有するワーク２を環状部３の中心軸まわりに回転させながら、環状部３の外周面を誘導加熱し、且つ環状部３の内周面を冷却して環状部３の内周面の過度の温度上昇を抑制するものであり、例えば焼入処理では環状部３のズブ焼入を防止する。   The heat treatment apparatus 1 heats the outer peripheral surface of the annular portion 3 by induction heating while rotating the workpiece 2 having the annular portion 3 around the central axis of the annular portion 3, and cools the inner peripheral surface of the annular portion 3. For example, in the quenching process, the hardening of the annular portion 3 is prevented.

ワーク２は、図示の例では、複数のギア歯４が環状部３の外周面に設けられた歯車であり、環状部３は略円形状の基板部５の片面側で基板部５の外周縁に立設されている。また、基板部５の中央部には軸孔６が穿設されている。   In the illustrated example, the work 2 is a gear in which a plurality of gear teeth 4 are provided on the outer peripheral surface of the annular portion 3. The annular portion 3 is located on one side of the substantially circular substrate portion 5 on the outer peripheral edge of the substrate portion 5. It is erected in. A shaft hole 6 is formed in the center of the substrate portion 5.

熱処理装置１は、環状部３の中心軸まわりにワーク２を回転させる回転駆動部１０と、環状部３の内周面に冷却液をかけて環状部３の内周面を冷却する冷却装置１１と、冷却装置１１に冷却液を供給するポンプ装置１２と、環状部３の外周面を誘導加熱する誘導加熱コイル１３と、誘導加熱コイル１３に高周波の電力を供給する図示しない電源装置と、を備える。   The heat treatment apparatus 1 includes a rotation drive unit 10 that rotates the work 2 around the central axis of the annular portion 3 and a cooling device 11 that cools the inner peripheral surface of the annular portion 3 by applying a coolant to the inner peripheral surface of the annular portion 3. A pump device 12 for supplying a cooling liquid to the cooling device 11, an induction heating coil 13 for induction heating the outer peripheral surface of the annular portion 3, and a power supply device (not shown) for supplying high-frequency power to the induction heating coil 13. Prepare.

冷却装置１１は、ワーク２を支持する支持部２０と、ワーク２の環状部３の内側に配置されるジャケット部２１と、鉛直な回転軸Ａまわりに支持部２０及びジャケット部２１を一体に回転可能に支持する回転軸部２２と、を有する。   The cooling device 11 includes a support portion 20 that supports the work 2, a jacket portion 21 disposed inside the annular portion 3 of the work 2, and integrally rotates the support portion 20 and the jacket portion 21 around a vertical rotation axis A. And a rotating shaft portion 22 that supports as possible.

回転軸部２２は、回転軸Ａ上に配置されたシャフト３０と、ハウジング３１とを含み、シャフト３０が挿通されるハウジング３１の軸孔３２の両端部には、シャフト３０を回転可能に支持するベアリング３３がそれぞれ取り付けられている。   The rotating shaft portion 22 includes a shaft 30 disposed on the rotating shaft A and a housing 31, and the shaft 30 is rotatably supported at both ends of a shaft hole 32 of the housing 31 through which the shaft 30 is inserted. Bearings 33 are respectively attached.

シャフト３０には、回転軸Ａに沿って上側端部からハウジング３１の軸孔３２に収容されている中間部まで延びる縦孔３５、及び縦孔３５と交差する複数の横孔３６が設けられており、横孔３６は軸孔３２の中でシャフト３０の外周面にそれぞれ開口している。軸孔３２は一対のベアリング３３によって密封されており、ハウジング３１には、密封された軸孔３２に連通する給液口３７が設けられている。   The shaft 30 is provided with a vertical hole 35 extending from the upper end portion along the rotation axis A to an intermediate portion accommodated in the shaft hole 32 of the housing 31, and a plurality of horizontal holes 36 intersecting the vertical hole 35. The horizontal holes 36 are respectively opened in the outer peripheral surface of the shaft 30 in the shaft hole 32. The shaft hole 32 is sealed by a pair of bearings 33, and the housing 31 is provided with a liquid supply port 37 communicating with the sealed shaft hole 32.

ポンプ装置１２から供給される冷却液は、給液口３７から軸孔３２に流入し、そして、横孔３６及び縦孔３５によって構成される流路３４を通ってジャケット部２１に導かれる。   The cooling liquid supplied from the pump device 12 flows into the shaft hole 32 from the liquid supply port 37, and is guided to the jacket portion 21 through the flow path 34 including the horizontal hole 36 and the vertical hole 35.

ジャケット部２１は、ジャケット本体４０と、アタッチメント４１とで構成されている。   The jacket 21 includes a jacket body 40 and an attachment 41.

ジャケット本体４０は、略円柱状に形成された基部４２と、基部４２の一方の端部の外周縁から外径側に略円形状に広がるフランジ部４３を有する。アタッチメント４１は、略円板状に形成された底壁部４４と、底壁部４４の片面側で底壁部４４の外周縁に立設された略円筒状の周壁部４５とを有する。   The jacket body 40 has a base portion 42 formed in a substantially columnar shape, and a flange portion 43 extending in a substantially circular shape from the outer peripheral edge of one end of the base portion 42 to the outer diameter side. The attachment 41 has a bottom wall portion 44 formed in a substantially disk shape, and a substantially cylindrical peripheral wall portion 45 erected on the outer peripheral edge of the bottom wall portion 44 on one side of the bottom wall portion 44.

アタッチメント４１の底壁部４４がシャフト３０の上側端部に固定され、アタッチメント４１はシャフト３０に固定されている。そして、ジャケット本体４０の基部４２がアタッチメント４１の底壁部４４及び周壁部４５によって囲われる凹部に嵌り込み、ジャケット本体４０はアタッチメント４１に固定されている。   The bottom wall 44 of the attachment 41 is fixed to the upper end of the shaft 30, and the attachment 41 is fixed to the shaft 30. Then, the base 42 of the jacket body 40 fits into a recess surrounded by the bottom wall 44 and the peripheral wall 45 of the attachment 41, and the jacket body 40 is fixed to the attachment 41.

ジャケット本体４０がアタッチメント４１に固定された状態で、ジャケット本体４０のフランジ部４３は、アタッチメント４１の周壁部４５の突端に隙間をあけて重なり、フランジ部４３と周壁部４５の突端との間の隙間によって、ジャケット部２１の外周面の全周に亘って連続するスリット４６が形成される。   In a state where the jacket body 40 is fixed to the attachment 41, the flange portion 43 of the jacket body 40 overlaps the protruding end of the peripheral wall portion 45 of the attachment 41 with a gap, and the gap between the flange portion 43 and the protruding end of the peripheral wall portion 45. The gap forms a continuous slit 46 over the entire outer peripheral surface of the jacket portion 21.

ジャケット本体４０及びアタッチメント４１には、シャフト３０の上側端部に開口する回転軸部２２の流路３４とスリット４６とを接続する流路が設けられており、流路３４を経てジャケット部２１に導かれた冷却液はスリット４６から噴射される。流路３４とスリット４６とを接続する流路については後述する。   The jacket body 40 and the attachment 41 are provided with a flow path that connects the flow path 34 of the rotary shaft 22 and the slit 46 that are open to the upper end of the shaft 30. The introduced cooling liquid is jetted from the slit 46. The flow path connecting the flow path 34 and the slit 46 will be described later.

支持部２０は、図示の例ではジャケット本体４０によって構成されている。ジャケット本体４０はワーク２の環状部３の内側に配置され、ジャケット本体４０の上面にワーク２の基板部５が載置される。ジャケット本体４０の上面中央部には、基板部５の軸孔６に嵌合する凸部４７が形成されており、凸部４７が軸孔６に嵌り込むことによって、ワーク２はジャケット本体４０を回転可能に支持するシャフト３０と同軸に配置される。   The support portion 20 is constituted by a jacket body 40 in the illustrated example. The jacket body 40 is disposed inside the annular portion 3 of the work 2, and the substrate 5 of the work 2 is placed on the upper surface of the jacket body 40. At the center of the upper surface of the jacket main body 40, a convex portion 47 that fits into the shaft hole 6 of the substrate portion 5 is formed, and when the convex portion 47 fits into the shaft hole 6, the work 2 causes the jacket main body 40 to move. It is arranged coaxially with the shaft 30 that supports rotatably.

ワーク２を回転させる回転駆動部１０は、上記のとおりワーク２を支持する冷却装置１１を含み、図示の例では昇降シャフト５０と、モータ５１とをさらに含む。   The rotation drive unit 10 that rotates the work 2 includes the cooling device 11 that supports the work 2 as described above, and further includes the elevating shaft 50 and the motor 51 in the illustrated example.

昇降シャフト５０は、ジャケット本体４０の上面に載置されたワーク２の基板部５をジャケット本体４０との間に挟み込んでワーク２を保持する。   The elevating shaft 50 holds the work 2 by sandwiching the substrate part 5 of the work 2 placed on the upper surface of the jacket body 40 between the jacket body 40.

モータ５１は、図示の例では冷却装置１１のシャフト３０を回転駆動する。シャフト３０に固定されたジャケット本体４０及び昇降シャフト５０によって保持されたワーク２は、シャフト３０の回転に伴いシャフト３０と同軸の環状部３の中心軸まわりに回転される。そして、ジャケット本体４０及びジャケット本体４０が固定されたアタッチメント４１もまた、ワーク２と一体に、環状部３の中心軸まわりに回転される。なお、モータ５１によって昇降シャフト５０を回転駆動するようにしてもよい。   The motor 51 rotationally drives the shaft 30 of the cooling device 11 in the illustrated example. The work 2 held by the jacket body 40 fixed to the shaft 30 and the elevating shaft 50 is rotated around the central axis of the annular portion 3 coaxial with the shaft 30 as the shaft 30 rotates. Then, the jacket body 40 and the attachment 41 to which the jacket body 40 is fixed are also rotated around the central axis of the annular portion 3 integrally with the work 2. The elevating shaft 50 may be rotationally driven by the motor 51.

誘導加熱コイル１３は、略円環状に形成されており、ジャケット本体４０及び昇降シャフト５０によって保持されたワーク２の環状部３の外周を囲んで配置される。   The induction heating coil 13 is formed in a substantially annular shape, and is disposed so as to surround the outer periphery of the annular portion 3 of the work 2 held by the jacket body 40 and the elevating shaft 50.

以上の熱処理装置１の構成において、まず、昇降シャフト５０及びジャケット本体４０によってワーク２を保持し、ワーク２を環状部３の中心軸まわりに回転させる。そしてワーク２を回転させながら、電源装置から誘導加熱コイル１３に高周波の電力を供給して環状部３の外周面を誘導加熱し、且つポンプ装置１２から冷却装置１１に冷却液を供給し、ジャケット部２１のスリット４６から冷却液を噴射して環状部３の内周面を冷却する。これにより、環状部３の内周面側の過度の温度上昇を抑制し、焼入処理においては環状部３のズブ焼入を防止して、環状部３の外周面側の表層部のみ（図示の例では、複数のギア歯４のみ）に硬化層を形成することができる。   In the configuration of the heat treatment apparatus 1 described above, first, the work 2 is held by the elevating shaft 50 and the jacket body 40, and the work 2 is rotated around the central axis of the annular portion 3. Then, while rotating the work 2, high-frequency power is supplied from the power supply device to the induction heating coil 13 to induction heat the outer peripheral surface of the annular portion 3, and the cooling liquid is supplied from the pump device 12 to the cooling device 11. The cooling liquid is injected from the slit 46 of the portion 21 to cool the inner peripheral surface of the annular portion 3. This suppresses an excessive rise in temperature on the inner peripheral surface side of the annular portion 3, prevents quenching of the annular portion 3 in the quenching process, and only the surface layer portion on the outer peripheral surface side of the annular portion 3 (shown in the drawing). In the example, the hardened layer can be formed only on the plurality of gear teeth 4).

そして、冷却液を噴射するスリット４６が、ワーク２の環状部３の内周面に対向するジャケット部２１の外周面の全周に亘って連続して設けられていることにより、ジャケット部２１がワーク２と一体に回転されていても、冷却液が環状部３の内周面に全周に亘ってかかる。これにより、環状部３の内周面を均一に冷却でき、冷却ムラに起因する割れや歪の発生を抑制してワーク２の熱処理品質を高めることができる。   Since the slit 46 for injecting the cooling liquid is provided continuously over the entire circumference of the outer peripheral surface of the jacket portion 21 facing the inner peripheral surface of the annular portion 3 of the work 2, the jacket portion 21 is formed. Even when the cooling liquid is being rotated integrally with the work 2, the cooling liquid is applied to the entire inner peripheral surface of the annular portion 3. Thereby, the inner peripheral surface of the annular portion 3 can be uniformly cooled, and the generation of cracks and distortion due to cooling unevenness can be suppressed, and the heat treatment quality of the work 2 can be improved.

次に、冷却装置１１において冷却液をスリット４６に導くジャケット部２１の流路について説明する。   Next, the flow path of the jacket portion 21 for guiding the cooling liquid to the slit 46 in the cooling device 11 will be described.

上記のとおり、ポンプ装置１２から供給される冷却液は、回転軸部２２の給液口３７から軸孔３２に流入し、そして、横孔３６及び縦孔３５によって構成される流路３４を通ってジャケット部２１に導かれる。   As described above, the coolant supplied from the pump device 12 flows into the shaft hole 32 from the liquid supply port 37 of the rotating shaft portion 22, and passes through the flow path 34 formed by the horizontal hole 36 and the vertical hole 35. To the jacket portion 21.

回転軸部２２の流路３４はシャフト３０の上側端部に開口しており、シャフト３０の上側端部に固定されたアタッチメント４１には、回転軸Ａに沿って底壁部４４を貫通して流路３４に接続される貫通孔６０が設けられている。   The flow path 34 of the rotating shaft 22 is open at the upper end of the shaft 30, and the attachment 41 fixed to the upper end of the shaft 30 passes through the bottom wall 44 along the rotating shaft A. A through hole 60 connected to the flow path 34 is provided.

アタッチメント４１に固定されたジャケット本体４０には、アタッチメント４１の底壁部４４に接する底面から回転軸Ａに沿って延び、貫通孔６０に接続される縦孔６１と、縦孔６１からジャケット本体４０の基部４２の外周面に達する複数の分岐流路６２とが設けられている。複数の分岐流路６２は、縦孔６１を中心にして略等しい角度をあけて放射状に設けられおり、図２に示す例では略６０度おきに六本の分岐流路６２が設けられている。   The jacket body 40 fixed to the attachment 41 has a vertical hole 61 extending along the rotation axis A from the bottom surface in contact with the bottom wall portion 44 of the attachment 41 and connected to the through hole 60, and a jacket body 40 extending from the vertical hole 61. And a plurality of branch flow paths 62 reaching the outer peripheral surface of the base 42 of the base. The plurality of branch channels 62 are provided radially at substantially equal angles around the vertical hole 61, and in the example shown in FIG. 2, six branch channels 62 are provided at approximately 60 degrees intervals. .

そして、アタッチメント４１の周壁部４５の内周は、底壁部４４からジャケット本体４０の基部４２の外周面における分岐流路６２の開口位置までの下側部分に対して、分岐流路６２の開口位置から周壁部４５の突端までの上側部分が相対的に大径に形成されている。基部４２は周壁部４５の小径な下側部分に嵌合し、基部４２と周壁部４５の大径な上側部分との間には、環状の空間として構成され、スリット４６と全周に亘って連通する液溜め部６３が設けられている。   The inner periphery of the peripheral wall portion 45 of the attachment 41 has an opening of the branch flow channel 62 with respect to a lower portion from the bottom wall portion 44 to an opening position of the branch flow channel 62 on the outer peripheral surface of the base portion 42 of the jacket body 40. The upper portion from the position to the protruding end of the peripheral wall portion 45 is formed to have a relatively large diameter. The base 42 is fitted into a small-diameter lower portion of the peripheral wall 45, and is formed as an annular space between the base 42 and the large-diameter upper portion of the peripheral wall 45, and extends over the entire circumference of the slit 46. A communicating reservoir 63 is provided.

冷却液は、回転軸部２２の流路３４から貫通孔６０及び縦孔６１を介して分岐流路６２に流入し、各分岐流路６２を通って液溜め部６３に送られ、液溜め部６３に一旦溜められてスリット４６から噴射される。   The cooling liquid flows from the flow path 34 of the rotating shaft 22 into the branch flow paths 62 through the through holes 60 and the vertical holes 61, and is sent to the liquid storage section 63 through each of the branch flow paths 62. The liquid is temporarily stored in 63 and injected from the slit 46.

スリット４６と全周に亘って連通する液溜め部６３に冷却液を一旦溜めることにより、スリット４６における冷却液の圧力を均一化でき、環状部３の内周面をより均一に冷却することが可能となる。   By temporarily storing the cooling liquid in the liquid reservoir 63 communicating with the slit 46 over the entire circumference, the pressure of the cooling liquid in the slit 46 can be made uniform, and the inner peripheral surface of the annular portion 3 can be cooled more uniformly. It becomes possible.

さらに、流路３４から放射状に延びる複数の分岐流路６２を通して冷却液を液溜め部６３に送ることにより、液溜め部６３の各部に冷却液を偏りなく供給できる。これにより、スリット４６における冷却液の圧力をさらに均一化でき、環状部３の内周面を一層均一に冷却することが可能となる。   Further, by sending the coolant to the liquid reservoir 63 through the plurality of branch channels 62 extending radially from the channel 34, the coolant can be evenly supplied to each part of the liquid reservoir 63. Thereby, the pressure of the cooling liquid in the slit 46 can be made more uniform, and the inner peripheral surface of the annular portion 3 can be more uniformly cooled.

好ましくは、図示の例のように、分岐流路６２とスリット４６とが回転軸Ａ上において異なる位置に設けられ、分岐流路６２の開口は周壁部４５の内周面に対向して配置される。これにより、冷却液が液溜め部６３にてより確実に分散され、スリット４６における冷却液の圧力をさらに均一化でき、環状部３の内周面を一層均一に冷却することが可能となる。   Preferably, as in the illustrated example, the branch flow path 62 and the slit 46 are provided at different positions on the rotation axis A, and the opening of the branch flow path 62 is disposed to face the inner peripheral surface of the peripheral wall 45. You. Thereby, the cooling liquid is more reliably dispersed in the liquid reservoir 63, the pressure of the cooling liquid in the slit 46 can be made more uniform, and the inner peripheral surface of the annular portion 3 can be more uniformly cooled.

１ 熱処理装置
２ ワーク
３ 環状部
１０ 回転駆動部
１１ 冷却装置
１２ ポンプ装置
１３ 誘導加熱コイル
２０ 支持部
２１ ジャケット部
２２ 回転軸部
３０ シャフト
３４ 流路
４６ スリット
６２ 分岐流路
６３ 液溜め部 DESCRIPTION OF SYMBOLS 1 Heat treatment apparatus 2 Work 3 Annular part 10 Rotary drive part 11 Cooling device 12 Pump device 13 Induction heating coil 20 Support part 21 Jacket part 22 Rotation shaft part 30 Shaft 34 Flow path 46 Slit 62 Branch flow path 63 Liquid storage part

Claims (5)

環状部を有するワークを支持する支持部と、
前記ワークの前記環状部の内側に配置され、前記環状部の内周面に冷却液をかけるジャケット部と、
前記ワークの前記環状部と同軸の回転軸まわりに前記支持部及び前記ジャケット部を一体に回転可能に支持する回転軸部と、
を備え、
前記ワークの前記環状部の内周面に対向する前記ジャケット部の外周面に、前記冷却液を噴射するスリットが全周に亘って連続して設けられており、
前記ジャケット部は、前記スリットと全周に亘って連通する環状の液溜め部をさらに有する冷却装置。 A support portion for supporting a work having an annular portion,
A jacket portion that is disposed inside the annular portion of the work and that applies a coolant to an inner peripheral surface of the annular portion;
A rotation shaft portion that supports the support portion and the jacket portion integrally and rotatably around a rotation axis that is coaxial with the annular portion of the work,
With
On the outer peripheral surface of the jacket portion facing the inner peripheral surface of the annular portion of the work, a slit for injecting the cooling liquid is provided continuously over the entire circumference ,
The cooling device, wherein the jacket further includes an annular liquid reservoir communicating with the slit over the entire circumference. 請求項１記載の冷却装置であって、
前記回転軸部は、前記回転軸に沿って前記冷却液を前記ジャケット部に導く流路を有し、
前記ジャケット部は、前記流路から放射状に延び、前記流路と前記液溜め部とを接続する複数の分岐流路をさらに有する冷却装置。 The cooling device according to claim 1 ,
The rotating shaft portion has a flow path that guides the coolant to the jacket portion along the rotating shaft,
The cooling device, wherein the jacket portion radially extends from the flow channel and further includes a plurality of branch flow channels connecting the flow channel and the liquid reservoir. 請求項２記載の冷却装置であって、
前記複数の分岐流路と前記スリットとは前記回転軸上において異なる位置に配置されている冷却装置。 The cooling device according to claim 2 , wherein
The cooling device, wherein the plurality of branch channels and the slit are arranged at different positions on the rotation axis. 請求項１から３のいずれか一項記載の前記冷却装置を含んで前記ワークを保持し、前記ワーク及び前記冷却装置の前記ジャケット部を一体に回転させる回転駆動部と、
前記ワークの前記環状部の外周を囲む誘導加熱コイルと、
を備え、
前記回転駆動部によって前記ワークと前記冷却装置の前記ジャケット部とを回転させながら、前記誘導加熱コイルによって前記ワークの前記環状部の外周面を誘導加熱し、且つ前記ジャケット部の前記スリットから冷却液を噴射して前記環状部の内周面を冷却する熱処理装置。 A rotation driving unit that holds the work including the cooling device according to any one of claims 1 to 3 , and integrally rotates the jacket of the work and the cooling device,
An induction heating coil surrounding the outer periphery of the annular portion of the work,
With
While rotating the work and the jacket of the cooling device by the rotation drive unit, the induction heating coil heats the outer peripheral surface of the annular portion of the work by induction heating, and the cooling liquid flows through the slit of the jacket. A heat treatment apparatus for injecting water to cool an inner peripheral surface of the annular portion. ワークの環状部の内側に、外周面に全周に亘って連続するスリットが設けられ且つ前記スリットと全周に亘って連通する環状の液溜め部を有する冷却ジャケットを配置し、
前記ワーク及び前記冷却ジャケットを、前記ワークの前記環状部の中心軸まわりに一体に回転させながら、前記環状部の外周面を誘導加熱し、且つ前記冷却ジャケットの前記スリットから冷却液を噴射して前記環状部の内周面を冷却する熱処理方法。 On the inner side of the annular portion of the work, a cooling jacket having an annular liquid reservoir portion provided with a slit continuous over the entire outer circumference on the outer peripheral surface and communicating with the slit over the entire circumference is arranged.
While the work and the cooling jacket are integrally rotated around the central axis of the annular portion of the work, the outer peripheral surface of the annular portion is induction-heated, and a coolant is injected from the slit of the cooling jacket. A heat treatment method for cooling an inner peripheral surface of the annular portion.
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