JP2011241415A - Induction heating device and induction heating method - Google Patents

Induction heating device and induction heating method Download PDF

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JP2011241415A
JP2011241415A JP2010112401A JP2010112401A JP2011241415A JP 2011241415 A JP2011241415 A JP 2011241415A JP 2010112401 A JP2010112401 A JP 2010112401A JP 2010112401 A JP2010112401 A JP 2010112401A JP 2011241415 A JP2011241415 A JP 2011241415A
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heating
induction heating
processing target
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pair
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JP5667786B2 (en
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Hitoshi Nakatsu
仁 中津
Hisaaki Watabe
久明 渡部
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Neturen Co Ltd
Neturen Takuto Co Ltd
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Neturen Co Ltd
Neturen Takuto 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
    • Y02P10/00—Technologies related to metal processing
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Abstract

PROBLEM TO BE SOLVED: To provide an induction heating device that performs a moving heating treatment accurately by a simple structure, and to provide an induction heating method.SOLUTION: The induction heating device 10 includes: a first moving part 13 that rectilinearly transfers a work P1 with a part A1 to be treated along in a prescribed first direction; a pair of heating units 12A, 12B that include a heating conductor 31 placed opposite the part A1 to be treated of the work P1; a second moving part 14 that rectilinearly transfers the pair of heating units 12A, 12B along in a second direction intersecting with the first direction; and a direction changer 15 for changing the directions of the heating units 12A, 12B.

Description

本発明は、誘導加熱装置及び誘導加熱方法に係り、例えば処理対象物と誘導加熱コイルを相対的に移動しながら処理するものに関する。   The present invention relates to an induction heating apparatus and an induction heating method, and for example, relates to an apparatus that performs processing while relatively moving an object to be processed and an induction heating coil.

金属部材に高周波焼き入れ等の熱処理を行う誘導加熱装置において、例えばサイズの大きい処理対象物及び被処理部を対象とする場合等に、被処理部の一部のみに対応する誘導加熱コイルを、被処理部に対して相対的に移動させながら加熱処理する移動式の誘導加熱装置が知られている。   In an induction heating apparatus that performs heat treatment such as induction hardening on a metal member, for example, when targeting a large processing object and a processing target part, an induction heating coil corresponding to only a part of the processing target part, 2. Description of the Related Art A mobile induction heating apparatus that performs heat treatment while being moved relative to a processing target is known.

このような移動式の誘導加熱装置において、被処理部が円形である場合には、被処理部を有する処理対象物を回転運動させながら、あるいは加熱装置を被処理部の軌跡に沿って旋回移動させながら、加熱処理を行っている（例えば、特許文献１参照）。   In such a mobile induction heating device, when the processing target is circular, the processing target having the processing target is rotated, or the heating device is swung along the trajectory of the processing target. The heat treatment is performed while allowing the heat treatment to occur (see, for example, Patent Document 1).

特表２００８−５３０４６０号公報Special table 2008-530460 gazette

しかしながら、上記技術には以下のような問題がある。すなわち、上述の移動方法では、サイズの大きな被処理部を対象とした場合に、大型の処理対象物を回転運動させ、あるいは加熱装置を大きな軌跡に沿って旋回移動させる必要があり、移動機構が大型かつ複雑になるという問題がある。また処理対象物と加熱部との位置関係を高精度に維持することも困難となる。   However, the above technique has the following problems. That is, in the moving method described above, when a large-size processing target is targeted, it is necessary to rotationally move a large processing object or to turn the heating device along a large trajectory. There is a problem that it becomes large and complicated. It also becomes difficult to maintain the positional relationship between the processing object and the heating unit with high accuracy.

そこで、本発明は、簡単な構造で高精度に移動加熱処理を行うことが可能な誘導加熱装置及び誘導加熱方法を提供することを目的とする。   Then, an object of this invention is to provide the induction heating apparatus and the induction heating method which can perform a moving heat processing with a simple structure with high precision.

本発明の一態様にかかる誘導加熱装置は、被処理部を有する処理対象物を、所定の第１方向に沿って直線移動させる第１移動手段と、前記処理対象物の前記被処理部に対向配置される加熱部を有する一対の加熱ユニットと、一対の前記加熱ユニットを、前記第１方向に交差する第２方向に沿って直線移動させる第２移動手段と、前記加熱ユニットの向きを変える変向手段と、を備えたことを特徴とする。   An induction heating apparatus according to an aspect of the present invention is configured to face a first moving unit that linearly moves a processing target having a processing target along a predetermined first direction, and the processing target of the processing target. A pair of heating units having a heating unit disposed; second moving means for linearly moving the pair of heating units along a second direction intersecting the first direction; and a change in the direction of the heating unit. Directing means.

本発明によれば、簡単な構造で高精度に移動加熱処理を行うことが可能となる。   According to the present invention, it is possible to perform moving heat treatment with high accuracy with a simple structure.

本発明の第１実施形態に係る誘導加熱装置を示す平面図。The top view which shows the induction heating apparatus which concerns on 1st Embodiment of this invention. 同誘導加熱装置を示す側面図。The side view which shows the same induction heating apparatus. 同誘導加熱装置の構成を示す平面図。The top view which shows the structure of the same induction heating apparatus. 同誘導加熱装置の動作を示す説明図。Explanatory drawing which shows operation | movement of the same induction heating apparatus. 同誘導加熱装置の動作を示す説明図。Explanatory drawing which shows operation | movement of the same induction heating apparatus. 本発明の他の実施形態にかかる誘導加熱装置を示す平面図。The top view which shows the induction heating apparatus concerning other embodiment of this invention. 同誘導加熱装置を示す側面図。The side view which shows the same induction heating apparatus.

以下、本発明の一実施形態かかる誘導加熱装置１０について、図１乃至図４を参照して説明する。図中矢印Ｘ，Ｙ，Ｚはそれぞれ互いに直交する３方向を示す。また、各図において説明のため、適宜構成を拡大、縮小または省略して示している。   Hereinafter, an induction heating apparatus 10 according to an embodiment of the present invention will be described with reference to FIGS. 1 to 4. In the figure, arrows X, Y, and Z indicate three directions orthogonal to each other. In each drawing, the configuration is appropriately enlarged, reduced, or omitted for explanation.

図１は本実施形態に係る誘導加熱装置１０の全体構成を概略的に示す平面図である。図２乃至図４は、誘導加熱装置１０の側面図、誘導加熱ユニット１２Ａの平面図、及び誘導加熱装置１０の動作説明図を、それぞれ示す。   FIG. 1 is a plan view schematically showing the overall configuration of an induction heating apparatus 10 according to the present embodiment. 2 to 4 are a side view of the induction heating device 10, a plan view of the induction heating unit 12A, and an operation explanatory diagram of the induction heating device 10, respectively.

図１及び図２に示すように、誘導加熱装置１０は、被処理部Ａ１の少なくとも一部を誘導加熱する一対の誘導加熱ユニット１２Ａ，１２Ｂ（加熱ユニット）と、被処理部Ａ１を有する処理対象物としてのワークＰ１を所定の第１方向に直線移動する第１移動手段１３と、誘導加熱ユニット１２Ａ，１２Ｂを互いに接離するように第１方向と交差する第２方向に直線移動させる第２移動手段１４と、誘導加熱ユニット１２Ａ，１２Ｂの向きを変える変向手段１５と、を備えて構成される。   As shown in FIGS. 1 and 2, the induction heating apparatus 10 includes a pair of induction heating units 12A and 12B (heating units) for induction heating at least a part of the processing target A1, and a processing target including the processing target A1. A first moving means 13 that linearly moves the workpiece P1 as a workpiece in a predetermined first direction, and a second that linearly moves the induction heating units 12A and 12B in a second direction that intersects the first direction so as to contact and separate from each other. The moving means 14 and the direction changing means 15 which changes the direction of induction heating unit 12A, 12B are comprised.

処理対象物の一例としてのワークＰ１は厚さ２５ｍｍ以上の肉厚部品であり、例えばここでは、中心Ｃ１を軸心とした、外側半径ｒ１＝２５０ｍｍ、内側半径ｒ２＝２００ｍｍ、肉厚寸法ｔ１＝５０ｍｍ、軸方向（第１方向）長さｌ１＝１００ｍｍの円筒状部材である。   The workpiece P1 as an example of the processing object is a thick part having a thickness of 25 mm or more. For example, here, the outer radius r1 = 250 mm, the inner radius r2 = 200 mm, and the thickness dimension t1 = centering on the center C1. A cylindrical member having a length of 50 mm and an axial direction (first direction) of l1 = 100 mm.

本実施形態においては、例えば、ワークＰ１の外周面の軸方向中央部分の円形の帯状の領域を被処理部Ａ１とし、この被処理部Ａ１を周方向Ｒに沿って全周にわたって熱処理する場合を示す。被処理部Ａ１は、ワークＰ１の外周面における周方向Ｒに沿って連続する円形の無端のループ形状の帯状の領域を成す。   In the present embodiment, for example, a case where a circular belt-like region in the central portion in the axial direction of the outer peripheral surface of the work P1 is a processing target A1, and this processing target A1 is heat-treated along the circumferential direction R over the entire circumference. Show. The part A1 to be processed forms a circular endless loop-shaped band-like region continuous along the circumferential direction R on the outer peripheral surface of the workpiece P1.

一対の誘導加熱ユニット１２Ａ，１２Ｂは、ワークＰ１の外側に配置され、その加熱導体部３１がワークＰ１の被処理部Ａ１における一部分に所定のギャップ寸法Ｇ１を確保して対向するように、内側に向かって配置される。図１乃至図３に示すように、各誘導加熱ユニット１２Ａ，１２Ｂは、図３に示す電源供給手段としての高周波電源２１と、高周波電源２１に接続されるリード線２２、２３と、リード線２２，２３に接続される一対の導電板２４，２４を備えるスペーサ２８と、両端が一対の導電板２４，２４（一方のみ図３に示す）にそれぞれ接続された誘導加熱コイル２６と、誘導加熱コイル２６の加熱導体部３１の裏側に配置されるコア２７と、高周波電源２１に接続された変成器２９と、を備えて構成されている。   The pair of induction heating units 12A and 12B are arranged on the outside of the work P1, and the heating conductor portion 31 is arranged on the inside so as to face a part of the processing target A1 of the work P1 with a predetermined gap dimension G1. It is arranged toward. As shown in FIGS. 1 to 3, each induction heating unit 12 </ b> A, 12 </ b> B includes a high frequency power source 21 as power supply means shown in FIG. 3, lead wires 22, 23 connected to the high frequency power source 21, and a lead wire 22. , 23, a spacer 28 having a pair of conductive plates 24, 24, an induction heating coil 26 having both ends connected to a pair of conductive plates 24, 24 (only one is shown in FIG. 3), and an induction heating coil 26, a core 27 disposed on the back side of the heating conductor portion 31, and a transformer 29 connected to the high-frequency power source 21.

誘導加熱コイル２６は、ワークＰ１の被処理部Ａ１に対向する加熱導体部３１（加熱部）と、加熱導体部３１の一端３１ａ側に連続する第１の接続導体部３２と、加熱導体部３１の他端３１ｂ側に連続する第２の接続導体部３３と、を連続して一体に備えている。   The induction heating coil 26 includes a heating conductor portion 31 (heating portion) facing the processing target A1 of the workpiece P1, a first connecting conductor portion 32 continuous to one end 31a side of the heating conductor portion 31, and a heating conductor portion 31. And the second connecting conductor portion 33 continuous to the other end 31b side of the other end 31b.

加熱導体部３１は、平面視において周方向Ｒに沿って湾曲した形状を成し、所定の間隙を確保して、被処理部Ａ１の一部に対向配置される。加熱導体部３１は円形の被処理部Ａ１の中心線上において、被処理部Ａ１の中心Ｃ１に向かって、配置されている。   The heating conductor portion 31 has a curved shape along the circumferential direction R in plan view, and is disposed to face a part of the processing target portion A1 while ensuring a predetermined gap. The heating conductor portion 31 is arranged on the center line of the circular processed portion A1 toward the center C1 of the processed portion A1.

第１の接続導体部３２の端部及び第２の接続導体部３３の端部には冷却液用のホースなどの部品を接続するためのカップラ３６が設けられている。第１の接続導体部３２と第２の接続導体部３３とは、スペーサ２８を挟んで厚さ（Ｚ軸）方向に離間して配置されている。スペーサ２８は、それぞれ矩形の平板状を成す一対の導電板２４，２４と、これら一対の導電板２４，２４の間に挟まれる矩形の平板状の絶縁板３８とがＺ方向に重ねて配置されるとともに、これら導電板２４，２４及び絶縁板３８が絶縁ブッシュを介してボルト及びナットにより固定されて構成されている。各導電板２４，２４は、リード線２２、２３を介して高周波電源２１に接続されている。   A coupler 36 for connecting components such as a coolant hose is provided at the end of the first connection conductor 32 and the end of the second connection conductor 33. The first connection conductor portion 32 and the second connection conductor portion 33 are arranged to be separated from each other in the thickness (Z-axis) direction with the spacer 28 interposed therebetween. The spacer 28 includes a pair of conductive plates 24 and 24 each having a rectangular flat plate shape, and a rectangular flat plate-shaped insulating plate 38 sandwiched between the pair of conductive plates 24 and 24 so as to overlap each other in the Z direction. The conductive plates 24, 24 and the insulating plate 38 are fixed by bolts and nuts via an insulating bush. Each of the conductive plates 24, 24 is connected to the high frequency power supply 21 through lead wires 22, 23.

誘導加熱コイル２６は銅などの材質から例えば矩形の中空形状に形成されている。この中空部分は冷却液が流通する通路となる。コア２７は、ケイ素鋼板、ポリアイアンコア、フェロトン等の高透磁率を有する材質からなり、加熱導体部３１の裏側、すなわち被処理部Ａ１とは反対側に、配置されている。   The induction heating coil 26 is formed in a rectangular hollow shape from a material such as copper. This hollow portion becomes a passage through which the coolant flows. The core 27 is made of a material having a high magnetic permeability such as a silicon steel plate, a polyiron core, or ferroton, and is disposed on the back side of the heating conductor portion 31, that is, on the side opposite to the processing target portion A1.

図１及び図２に示すように、第１移動部（第１移動手段）１３は、図中Ｙ軸に沿うガイドレール１３ａ（第１通路）と、ワークＰ１を支持するとともにガイドレール１３ａ上を移動するワーク支持レール１３ｂと、を備えている。ガイドレール１３ａはＹ軸に沿って延びる一対のレール部材からなる。第１移動部１３は、ワークＰ１をガイドレール１３ａに係合支持した状態でＹ軸に沿って直線移動（第１移動）させる。   As shown in FIGS. 1 and 2, the first moving portion (first moving means) 13 supports a guide rail 13a (first passage) along the Y-axis in the drawing and the workpiece P1 and on the guide rail 13a. And a work support rail 13b that moves. The guide rail 13a is composed of a pair of rail members extending along the Y axis. The first moving unit 13 linearly moves (first movement) along the Y axis in a state where the workpiece P1 is engaged and supported by the guide rail 13a.

第２移動部（第２移動手段）１４は、図中Ｘ軸に沿うガイドレール１４ａと、一対の誘導加熱ユニット１２Ａ，１２Ｂを支持するとともにガイドレール１４ａ上を移動する一対のユニット支持レール１４ｂと、を備えている。ガイドレール１４ａはＸ軸に沿って延びる一対のレール部材からなる。第２移動部１４は、一対の誘導加熱ユニット１２Ａ，１２Ｂをガイドレール１４ａに係合支持した状態で図中Ｘ軸に沿って直線移動（第２移動）させる。   The second moving part (second moving means) 14 includes a guide rail 14a along the X axis in the figure, a pair of unit support rails 14b that support the pair of induction heating units 12A and 12B and move on the guide rail 14a. It is equipped with. The guide rail 14a includes a pair of rail members extending along the X axis. The second moving unit 14 linearly moves (second movement) along the X axis in the drawing in a state where the pair of induction heating units 12A and 12B are engaged and supported by the guide rail 14a.

変向部（変向手段）１５は、例えばＸ軸上の所定の中心Ｃ２を軸心として加熱ユニット１２Ａ，１２Ｂを回転させる回転部１５ａを備える。この回転部１５ａにより、変成器２９を回転させることで加熱導体部３１が被処理部Ａ１の中心Ｃ１に向かうように加熱ユニット１２Ａ，１２Ｂの向きを変化させる。変向部１５は、それぞれ移動するワークＰ１と加熱ユニット１２Ａ，１２Ｂとの移動に応じて、加熱導体部３１がワークＰ１の被処理部Ａ１に常に対向するように加熱ユニット１２Ａ，１２Ｂの向きを調節する（変向動作）。このとき、加熱導体部３１とワークＰ１との間のギャップ寸法Ｇ１は所定値に維持される。   The turning section (turning means) 15 includes, for example, a rotating section 15a that rotates the heating units 12A and 12B around a predetermined center C2 on the X axis. The rotating unit 15a rotates the transformer 29 to change the direction of the heating units 12A and 12B so that the heating conductor 31 is directed to the center C1 of the processing target A1. The turning portion 15 changes the direction of the heating units 12A and 12B so that the heating conductor portion 31 always faces the portion to be processed A1 of the workpiece P1 according to the movement of the moving workpiece P1 and the heating units 12A and 12B. Adjust (turning operation). At this time, the gap dimension G1 between the heating conductor portion 31 and the workpiece P1 is maintained at a predetermined value.

以下、本実施形態にかかる誘導加熱方法について図４を参照して説明する。本実施形態の誘導加熱方法は、一対の誘導加熱ユニット１２Ａ，１２Ｂにより被処理部Ａ１を加熱しながら相対移動させる移動加熱工程を備える。   Hereinafter, the induction heating method according to the present embodiment will be described with reference to FIG. The induction heating method of the present embodiment includes a moving heating process in which the processing target A1 is relatively moved while being heated by the pair of induction heating units 12A and 12B.

移動加熱工程において、被処理部Ａ１のうち一部に加熱導体部３１を対向させた状態で、高周波電源２１をＯＮ状態とすると、高周波電流が、リード線２２、上側の導電板２４、第１の接続導体部３２、加熱導体部３１、第２の接続導体部３３、下側の導電板２４（不図示）、及びリード線２３、を順に経て、高周波電源２１に戻る。このとき、加熱導体部３１において高周波電流は図３中に矢印で示すように一端３１ａ側から他端３１ｂ側へ向かって流れ、加熱導体部３１の表面に誘導電流が発生し、対向配置される被処理部Ａ１の一部が加熱される。   In the moving heating process, when the high frequency power supply 21 is turned on with the heated conductor 31 facing a part of the processing target A1, the high frequency current is supplied to the lead wire 22, the upper conductive plate 24, the first conductive plate 24, and the first conductive plate 24. The connection conductor 32, the heating conductor 31, the second connection conductor 33, the lower conductive plate 24 (not shown), and the lead wire 23 are sequentially passed back to the high-frequency power source 21. At this time, the high-frequency current flows in the heating conductor portion 31 from the one end 31a side to the other end 31b side as shown by an arrow in FIG. 3, and an induced current is generated on the surface of the heating conductor portion 31 so as to face each other. A part of the processing target A1 is heated.

移動加熱工程では、上記の誘導加熱処理を行いながら、ワークＰ１の被処理部Ａ１の表面と加熱導体部３１の表面との間のギャップ寸法Ｇ１を所定値に維持した状態で、被処理部Ａ１に対して加熱導体部３１を所定の速度で相対移動させる。例えばここでは、電力を１００〜１５０ｋＷ、ギャップ寸法Ｇ１＝２．５ｍｍを維持しながら、ワークＰ１の周方向に、相対移動させる。   In the moving heating step, the portion to be processed A1 is maintained in a state where the gap dimension G1 between the surface of the portion to be processed A1 of the workpiece P1 and the surface of the heating conductor portion 31 is maintained at a predetermined value while performing the induction heating treatment. The heating conductor portion 31 is relatively moved at a predetermined speed. For example, here, the electric power is relatively moved in the circumferential direction of the workpiece P1 while maintaining a power of 100 to 150 kW and a gap size G1 = 2.5 mm.

ワークＰ１の周方向における相対移動について、図４のＳ１〜Ｓ５を参照して説明する。この相対移動は、ワークＰ１を第１方向であるＹ軸に沿って移動させる第１移動と、一対の誘導加熱ユニット１２Ａ，１２Ｂを互いに接離するように第２方向であるＸ軸に沿って直線移動させる第２移動と、加熱ユニット１２Ａ，１２Ｂを回転させて向きを変更する変向動作とを同時に行うことで、実現される。   The relative movement of the workpiece P1 in the circumferential direction will be described with reference to S1 to S5 in FIG. This relative movement includes a first movement for moving the workpiece P1 along the Y-axis that is the first direction, and an X-axis that is the second direction so that the pair of induction heating units 12A and 12B are brought into and out of contact with each other. This is realized by simultaneously performing the second movement for linear movement and the turning operation for changing the direction by rotating the heating units 12A and 12B.

まず初期状態において、ワークＰ１のＹ方向一端側に一対の誘導加熱ユニット１２Ａ，１２Ｂをセットする。このとき一対の加熱導体部３１が中心Ｃ１を向いた状態にセットする。この状態から、ワークＰ１をＹ方向他端側に移動させつつ（第１移動）、一対の誘導加熱ユニット１２Ａ，１２Ｂを互いに離間するようにＸ方向に移動させ（第２移動）、加熱導体部３１が常に被処理部Ａ１に対向するように変向し（変向動作）、Ｓ１、Ｓ２，Ｓ３の状態に順番に変位させていく。   First, in the initial state, a pair of induction heating units 12A and 12B are set on one end side of the workpiece P1 in the Y direction. At this time, the pair of heating conductors 31 is set in a state facing the center C1. From this state, while moving the workpiece P1 to the other end side in the Y direction (first movement), the pair of induction heating units 12A and 12B are moved in the X direction so as to be separated from each other (second movement), and the heating conductor portion The head 31 is always turned so as to face the processing target A1 (turning operation), and is sequentially displaced to the states S1, S2, and S3.

ワークＰ１の両側部にそれぞれ加熱ユニット１２Ａ，１２Ｂが離間して配置されるＳ３の状態を過ぎると、さらにワークＰ１をＹ方向他端側に移動させるとともに（第１移動）、今度は一対の誘導加熱ユニット１２Ａ，１２Ｂを互いに近接するようにＸ方向に移動させ（第２移動）、加熱導体部３１が常に被処理部Ａ１に対向するように変向し（変向動作）、Ｓ４，Ｓ５の状態に順番に変位させていく。   After passing through the state of S3 in which the heating units 12A and 12B are separately arranged on both sides of the work P1, the work P1 is further moved to the other end side in the Y direction (first movement), and this time a pair of inductions The heating units 12A and 12B are moved in the X direction so as to be close to each other (second movement), and the heating conductor portion 31 is always turned to face the portion to be processed A1 (turning operation). Displace to the state in order.

なお、本実施形態では被処理部Ａ１は円形状であるため、加熱導体部３１が常に中心Ｃ１を向くように角速度ωで変向し続ける。図５に示すように、本実施形態において初期位相α、変向動作の角速度ω、加熱導体部３１の中心Ｃ１からの距離（半径）Ｒ、時刻ｔ、とすると、中心Ｃ１から加熱導体部３１のＹ方向における距離ｙ（ｔ）＝Ｒsin（ωｔ+α）が成り立つ。ここではα＝-π／２であるので、距離ｙ（ｔ）＝Ｒｃｏｓ（-ωｔ）となる。一方、中心Ｃ１から加熱導体部３１のＸ方向における距離ｘ（ｔ）＝Ｒcos（ωｔ+α）が成り立つ。   In addition, in this embodiment, since the to-be-processed part A1 has a circular shape, the heating conductor part 31 keeps turning at an angular velocity ω so as to always face the center C1. As shown in FIG. 5, in this embodiment, assuming that the initial phase α, the angular velocity ω of the turning operation, the distance (radius) R from the center C1 of the heating conductor portion 31, and the time t, the heating conductor portion 31 from the center C1. The distance y (t) = Rsin (ωt + α) in the Y direction holds. Here, since α = −π / 2, the distance y (t) = Rcos (−ωt). On the other hand, a distance x (t) = Rcos (ωt + α) in the X direction of the heating conductor portion 31 from the center C1 is established.

ガイドレール１４ａはガイドレール１３ａに直交し、一対の誘導加熱ユニット１２Ａ，１２Ｂはガイドレール１３ａを挟んで接離するように配置されているため、Ｓ１〜Ｓ５に順番に推移していく間にワークＰ１は一対の誘導加熱ユニット１２Ａ，１２Ｂの間を通過することになる。   The guide rail 14a is orthogonal to the guide rail 13a, and the pair of induction heating units 12A and 12B are arranged so as to be in contact with and separated from each other with the guide rail 13a interposed therebetween. P1 passes between the pair of induction heating units 12A and 12B.

これらの第１移動、第２移動及び変向動作の組み合わせにより、誘導加熱ユニット１２Ａ，１２ＢがワークＰ１の外周に沿ってそれぞれ半周ずつ相対移動することとなる。このとき、誘導熱ユニット１２Ａ，１２Ｂを回転して加熱導体部３１の向きが調節されることで、常に加熱導体部３１が中心Ｃ１に向かうよう調整され、被処理部Ａ１と加熱導体部３１との相対的な位置関係が維持される。以上により、加熱導体部３１に対向配置されるワークＰ１の外周面の帯状の領域である被処理部Ａ１全域が均一に加熱される。被処理部Ａ１の全周にわたって加熱処理が行われ、移動加熱工程が終了する。   By the combination of the first movement, the second movement, and the turning operation, the induction heating units 12A and 12B are relatively moved along the outer circumference of the work P1 by half a circumference. At this time, the induction heat units 12A and 12B are rotated to adjust the direction of the heating conductor portion 31, so that the heating conductor portion 31 is always adjusted toward the center C1, and the processed portion A1 and the heating conductor portion 31 The relative positional relationship is maintained. As described above, the entire area A1 to be processed, which is a band-like region on the outer peripheral surface of the work P1 disposed to face the heating conductor 31, is uniformly heated. The heat treatment is performed over the entire periphery of the part A1 to be processed, and the moving heating process ends.

移動加熱工程の終了後には、例えば被処理部Ａ１を冷却する冷却工程を行う。冷却工程では、例えばワークＰ１を図示しない冷却部に移動させ、冷却部にてワークＰ１を冷却液で冷却する。さらに、誘導加熱コイル２６の内側の中空部分を通って、第１の接続導体部３２、加熱導体部３１、第２の接続導体部３３、の中空部分を経由して冷却液を流すことにより、誘導加熱コイル２６及び導電板２４，２４を冷却する。   After completion of the moving heating process, for example, a cooling process for cooling the processing target part A1 is performed. In the cooling step, for example, the workpiece P1 is moved to a cooling unit (not shown), and the workpiece P1 is cooled with a coolant in the cooling unit. Further, by flowing the coolant through the hollow portion of the first connecting conductor portion 32, the heating conductor portion 31, and the second connecting conductor portion 33 through the hollow portion inside the induction heating coil 26, The induction heating coil 26 and the conductive plates 24, 24 are cooled.

本実施形態にかかる誘導加熱装置及び誘導加熱方法によれば、以下のような効果が得られる。すなわち、第１移動、第２移動及び変向動作により、大型のワークを対象とした場合であっても、複数の単純な動作の組み合わせで容易かつ高精度に熱処理を行うことができる。すなわち、誘導加熱ユニット１２Ａ，１２Ｂを大きな円形の軌跡に沿って旋回移動させる必要がなく、また大型のワークＰ１を回転移動させる必要もないため、移動のための装置が単純化及び小型化できる。また単純な直線運動の組み合わせであるため位置関係を高精度に管理しやすい。   According to the induction heating apparatus and the induction heating method according to the present embodiment, the following effects can be obtained. That is, by the first movement, the second movement, and the turning operation, heat treatment can be easily and accurately performed by combining a plurality of simple operations even when a large workpiece is targeted. That is, the induction heating units 12A and 12B do not need to be swung along a large circular locus, and the large workpiece P1 does not need to be rotated, so that the apparatus for movement can be simplified and downsized. Moreover, since it is a combination of simple linear motions, it is easy to manage the positional relationship with high accuracy.

また、被処理部Ａ１の一部のみに対応する加熱導体部３１を相対移動させながら加熱処理を行うこととしたので、被処理部Ａ１及びワークＰ１が大型となる場合であっても加熱導体部３１のサイズを小さく抑えることができ、複数の誘導加熱ユニット１２Ａ，１２Ｂを小型にすることができる。このため、必要な電力を低くするとともに製造コストを低く抑えることが可能となる。   In addition, since the heating process is performed while relatively moving the heating conductor 31 corresponding to only a part of the processing target A1, even if the processing target A1 and the workpiece P1 are large, the heating conductor The size of 31 can be kept small, and the plurality of induction heating units 12A and 12B can be reduced in size. For this reason, it is possible to reduce the required power and the manufacturing cost.

また、被処理部Ａ１の一部のみに対向させつつ相対移動させながら加熱処理を行うこととしたので、円形などの曲部を有する部材をワークとした場合に、熱膨張等の要因によりワークＰ１が変形しても、容易に、適性なギャップ寸法を維持することができる。例えば円形の被処理部に対応する円環状の誘導加熱コイルを用いて一発加熱方式で熱処理を行う場合には、熱膨張によりワークＰ１が変形すると誘導加熱コイルの形状も変更して追従させる必要が生じるが、本実施形態のようにカバー率が小さい場合には、曲部の変形の影響が少ないので、ワークとの配置を調整するだけで適正なギャップを維持することが出来る。   In addition, since the heat treatment is performed while being relatively moved while facing only a part of the processing target A1, when a member having a curved portion such as a circle is used as a workpiece, the workpiece P1 is caused by factors such as thermal expansion. Even if deformed, an appropriate gap dimension can be easily maintained. For example, when heat treatment is performed by a single heating method using an annular induction heating coil corresponding to a circular target part, if the workpiece P1 is deformed by thermal expansion, the shape of the induction heating coil needs to be changed to follow. However, when the cover ratio is small as in the present embodiment, the influence of the deformation of the curved portion is small, so that an appropriate gap can be maintained only by adjusting the arrangement with the workpiece.

なお、本発明は上記各実施形態に限られるものではなく、各構成は適宜変形実施可能である。また、前記実施形態に開示されている複数の構成要素の適宜な組合せにより種々の発明を形成できる。例えば、処理条件や、各構成要素の形状、材質、寸法などは上記実施形態で例示したものに限られず、適宜変更可能である。   The present invention is not limited to the above-described embodiments, and each configuration can be modified as appropriate. Moreover, various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the embodiment. For example, the processing conditions, the shape, material, dimensions, etc. of each component are not limited to those exemplified in the above embodiment, and can be changed as appropriate.

上記実施形態においては、円筒状のワークＰ１の外周面を被処理部Ａ１としたが、これに限られるものではない。例えば図６及び図７に示す誘導加熱装置１００のように円筒状のワークＰ２の内周面を被処理部Ａ２とした場合にも本発明を適用できる。この場合にも、ワークＰ２を第１方向に移動させ、加熱ユニット１２Ａ，１２Ｂを第２方向に移動させるとともに、加熱ユニット１２Ａ，１２Ｂの向きを調節するだけの単純な動作で高精度に熱処理が可能となる。このとき、例えば比較的サイズの大きい変成器２９をワークＰ２の外周側に配置するとともに、誘導加熱コイル２６がワークＰ１を乗越えるように屈曲形成され、加熱導体部３１がワークＰ２の内周面の被処理部Ａ２に対向するように配置される。このとき、加熱導体部３１は円形の被処理部Ａ２の中心Ｃ１を通る中心線上において外方を向くように配置される。 In the embodiment described above, the outer peripheral surface of the cylindrical workpiece P1 is the processing target A1, but the present invention is not limited to this. For example, even the inner circumferential surface of the circular cylindrical workpiece P2 as the induction heating apparatus 100 shown in FIGS. 6 and 7 in the case of the portion to be processed A2 applicability of the present invention. Also in this case, the workpiece P2 is moved in the first direction, the heating units 12A and 12B are moved in the second direction, and the heat treatment can be performed with high accuracy with a simple operation only by adjusting the direction of the heating units 12A and 12B. It becomes possible. At this time, for example, a relatively large transformer 29 is arranged on the outer peripheral side of the work P2, and the induction heating coil 26 is bent so as to get over the work P1, so that the heating conductor 31 is an inner peripheral surface of the work P2. It arrange | positions so that it may oppose to to-be-processed part A2. At this time, the heating conductor portion 31 is disposed so as to face outward on a center line passing through the center C1 of the circular processed portion A2.

例えば加熱導体部３１の形状は、被処理部の大きさや形状等の各種条件に応じて適宜変更可能である。   For example, the shape of the heating conductor portion 31 can be appropriately changed according to various conditions such as the size and shape of the portion to be processed.

上記実施形態では、Ｚ方向において一様な帯状の被処理部Ａ１、Ａ２を例示したが、これに限られるものではなく、被処理部の表面が傾斜していてもよい。   In the said embodiment, although the strip-shaped to-be-processed part A1 and A2 uniform in the Z direction were illustrated, it is not restricted to this, The surface of a to-be-processed part may incline.

また、実施形態に示される全構成要素から幾つかの構成要素を削除してもよい。さらに、異なる実施形態に亘る構成要素を組合せてもよい。   Moreover, you may delete some components from all the components shown by embodiment. Furthermore, the constituent elements over different embodiments may be combined.

Ｐ１、Ｐ２…ワーク（処理対象物）、Ａ１、Ａ２…被処理部、Ｃ１…ワーク中心、Ｒ…周方向、Ｃ２…回転中心、１０…誘導加熱装置、
１２Ａ，１２Ｂ…誘導加熱ユニット、１３…第１移動部（第１移動手段）、
１３ａ…ガイドレール（第１通路）、１４…第２移動部（第２移動手段）、
１４ａ…ガイドレール（第２通路）、１５…変向部（変向移動手段）、
３１…加熱導体部（加熱部）。 P1, P2 ... Workpiece (object to be treated), A1, A2 ... Processed part, C1 ... Work center, R ... Circumferential direction, C2 ... Center of rotation, 10 ... Induction heating device,
12A, 12B ... induction heating unit, 13 ... first moving part (first moving means),
13a ... guide rail (first passage), 14 ... second moving part (second moving means),
14a ... guide rail (second passage), 15 ... turning part (turning movement means),
31 ... Heating conductor part (heating part).

Claims (4)

被処理部を有する処理対象物を、所定の第１方向に沿って直線移動させる第１移動手段と、
前記処理対象物の前記被処理部に対向配置される加熱部を有する一対の加熱ユニットと、
一対の前記加熱ユニットを、前記第１方向に交差する第２方向に沿って直線移動させる第２移動手段と、
前記加熱ユニットの向きを変える変向手段と、
を備えたことを特徴とする誘導加熱装置。 First moving means for linearly moving a processing object having a processing target portion along a predetermined first direction;
A pair of heating units having a heating unit disposed opposite to the processing target part of the processing object;
A second moving means for linearly moving the pair of heating units along a second direction intersecting the first direction;
Turning means for changing the orientation of the heating unit;
An induction heating apparatus comprising: 前記被処理部は円形状に連続する領域であり、
一対の前記加熱ユニットは、第１方向に沿って前記処理対象物が通過する第１通路を挟んで配置されるとともに、前記被処理部の中心を通る中心線上において回転して変向され、
前記処理対象物は前記一対の加熱ユニットの間を通って前記第１方向に移動することを特徴とする請求項１記載の誘導加熱装置。 The treated portion is a circular continuous region,
The pair of heating units are arranged with a first passage through which the object to be processed passes along a first direction, and are rotated and turned on a center line passing through the center of the processing target,
The induction heating apparatus according to claim 1, wherein the processing object moves in the first direction through the pair of heating units. 前記加熱ユニットは、前記加熱部に接続される高周波電源と、変成器と、を備えることを特徴とする請求項１記載の誘導加熱装置。   The induction heating apparatus according to claim 1, wherein the heating unit includes a high-frequency power source connected to the heating unit and a transformer. 一対の加熱ユニットの加熱部をそれぞれ被処理部のうち一部に対向させて誘導加熱により前記被処理部を加熱し、前記被処理部を有する処理対象物を所定の第１方向に沿って直線移動させるとともに、前記加熱部の向きを変えながら、一対の前記加熱ユニットを前記第１方向と交差する第２方向に沿って直線移動させる、移動加熱工程を備えたことを特徴とする、誘導加熱方法。   A heating unit of the pair of heating units is respectively opposed to a part of the processing target, the processing target is heated by induction heating, and the processing target having the processing target is straight along a predetermined first direction. Induction heating characterized by comprising a moving heating step of moving the pair of heating units linearly along a second direction intersecting the first direction while moving the heating unit. Method.
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WO2024095961A1 (en) * 2022-10-31 2024-05-10 日本精工株式会社 Method for inductively heating ring-shaped member and method for manufacturing ring-shaped member, ring-shaped member, bearing, inductive heating device, method for manufacturing bearing, method for manufacturing vehicle, and method for manufacturing mechanical device
CN117245280A (en) * 2023-09-28 2023-12-19 杭州萧山新欣钢构有限公司 Large special steel structure welding preheating device and method

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