JP2011127159A - High frequency induction heating apparatus - Google Patents

High frequency induction heating apparatus Download PDF

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JP2011127159A
JP2011127159A JP2009284837A JP2009284837A JP2011127159A JP 2011127159 A JP2011127159 A JP 2011127159A JP 2009284837 A JP2009284837 A JP 2009284837A JP 2009284837 A JP2009284837 A JP 2009284837A JP 2011127159 A JP2011127159 A JP 2011127159A
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workpiece
annealing
mark
quenching
high frequency
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JP5522661B2 (en
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Tsutomu Miyazaki
力 宮崎
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Miyaden 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
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a high frequency induction heating apparatus in which hardening and annealing of a workpiece can be almost continuously performed with one set of the heating apparatus and with which the hardening and the annealing having a prescribed condition can be surely performed and thus, the workpiece with good hardening and annealing quality can be easily and stably be obtained. <P>SOLUTION: The high frequency induction heating apparatus is provided with a heating coil, a high frequency power source, a cooler, a mark imparting tool and a controller. The controller supplies the high frequency current for hardening from the high frequency power source to the heating coil and hardens the hardening portion of the workpiece, and after hardening, the controller supplies the high frequency current for annealing from the high frequency power source to the heating coil and anneals the annealing portion of the workpiece, and after at least annealing of the workpiece, the mark imparting tool is operated to impart a prescribed mark to the non-hardening/non-annealing portion of the workpiece. The high frequency power source is provided with a first frequency power source part capable of supplying the high frequency electric current for hardening to the heating coil, and a second electric source part capable of supplying the high frequency electric current for annealing to the heating coil. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

本発明は、各種ワークの高周波誘導加熱による焼入れと焼鈍しを、１台の加熱装置によって略連続的に行うことが可能な高周波誘導加熱装置に関する。   The present invention relates to a high-frequency induction heating apparatus that can perform quenching and annealing of various workpieces by high-frequency induction heating substantially continuously with a single heating apparatus.

一般的に、例えばギヤシャフト等の軸状ワークにおいて、その外周面の所定部位を焼入れしたり焼鈍しする場合には、所定周波数の高周波電流により、前記所定部位に渦電流を誘起させて誘導加熱する高周波誘導加熱装置が使用されている。従来、このような高周波誘導加熱装置は、加熱コイルと、冷却手段、及び焼入れもしくは焼鈍しに適した所定周波数の高周波電流を発生可能な高周波電源等をそれぞれ有している。   In general, when a predetermined part of the outer peripheral surface of a shaft work such as a gear shaft is quenched or annealed, an eddy current is induced in the predetermined part by a high-frequency current having a predetermined frequency to induce induction heating. A high frequency induction heating device is used. Conventionally, such a high frequency induction heating apparatus has a heating coil, a cooling means, a high frequency power source capable of generating a high frequency current having a predetermined frequency suitable for quenching or annealing, and the like.

そして、焼入れする際には、焼入れに適した周波数の高周波電流を発生可能な高周波電源を備えた加熱装置から、加熱コイルに焼入れ用の高周波電流を供給して誘導加熱すると共に、冷却手段の冷却水により加熱部分を急速冷却することでワークを焼入れしている。また、焼鈍しする際には、焼鈍しに適した周波数の高周波電流を発生可能な高周波電源を備えた加熱装置から、加熱コイルに焼鈍し用の高周波電流を供給して誘導加熱することでワークを焼鈍ししている。なお、この種の高周波誘導加熱装置としては、例えば特許文献１が開示されている。   When quenching, a high-frequency power source capable of generating a high-frequency current having a frequency suitable for quenching is supplied to the heating coil by supplying a high-frequency current for quenching and induction heating, and the cooling means is cooled. The workpiece is quenched by rapidly cooling the heated part with water. In addition, when annealing, a work is performed by supplying induction high-frequency current to the heating coil from a heating device equipped with a high-frequency power source capable of generating a high-frequency current having a frequency suitable for annealing. Is annealed. As this type of high-frequency induction heating device, for example, Patent Document 1 is disclosed.

特開２００６−３４４２１号公報JP 2006-34421 A

しかしながら、このような高周波誘導加熱装置にあっては、ワークの焼入れと焼鈍しの条件がそれぞれ異なり、周波数の異なる高周波電源を備えた加熱装置をそれぞれ使用して行っているため、例えばワークの焼入れ後に続けて焼鈍しを行う場合に、焼入れ用の加熱装置で焼入れした後に焼鈍し用の加熱装置を作動させて行う必要があり、ワークの焼入れと焼鈍しを略連続的に行うことが困難で、その作業能率が劣る。   However, in such a high-frequency induction heating apparatus, the conditions for quenching and annealing of the workpiece are different, and each is performed using a heating apparatus having a high-frequency power source with a different frequency. When performing subsequent annealing, it is necessary to operate the heating device for annealing after quenching with the heating device for quenching, and it is difficult to quench and anneal the workpiece substantially continuously. The work efficiency is inferior.

また、焼入れ用の加熱装置で焼入れされたワークを該加熱装置から一旦取り出して、別位置に設置されている焼鈍し用の加熱装置にセットして焼鈍し作業をする必要があるため、ワークの加熱装置間の移動時等に、焼入れ不良のワークや焼入れされていないワークが、焼鈍し用の加熱装置に供給されて焼鈍しされる場合があり、所定条件で焼入れされたワークの所定条件での焼鈍しを確実に行うことが困難で、ワークに良好な焼入れ焼鈍し品質を容易かつ安定して得ることが難しい。   In addition, since it is necessary to take out the workpiece quenched by the heating device for quenching from the heating device and set it in the heating device for annealing installed at another position, When moving between heating devices, etc., workpieces that are poorly quenched or unquenched may be supplied to the heating device for annealing and annealed. It is difficult to reliably perform annealing, and it is difficult to easily and stably obtain good quenching and annealing quality for a workpiece.

本発明は、このような事情に鑑みてなされたもので、その目的は、ワークの焼入れと焼鈍しを１台の加熱装置で略連続的に行うことができると共に、所定条件の焼入れや焼鈍しが確実に行えて、良好な焼入れや焼鈍し品質のワークを容易かつ安定して得ることが可能な高周波誘導加熱装置を提供することにある。   The present invention has been made in view of such circumstances. The purpose of the present invention is to perform quenching and annealing of a workpiece substantially continuously with a single heating device, and quenching and annealing under predetermined conditions. It is an object of the present invention to provide a high-frequency induction heating apparatus capable of reliably and reliably obtaining workpieces of good quenching and annealing quality.

かかる目的を達成すべく、本発明のうち請求項１に記載の発明は、支持手段で支持されたワークの焼入れ部位及び焼鈍し部位に配置された加熱コイルと、該加熱コイルに所定周波数の高周波電流を供給する高周波電源と、前記ワークを冷却可能な冷却手段と、前記ワークに所定のマークを付与するマーク付与手段と、これらを制御する制御手段と、を備え、前記制御手段は、前記高周波電源から焼入れ用の高周波電流を前記加熱コイルに供給して前記ワークの焼入れ部位を焼入れし、該焼入れ後に前記高周波電源から焼鈍し用の高周波電流を前記加熱コイルに供給して前記ワークの焼鈍し部位を焼鈍しすると共に、少なくとも前記ワークの焼鈍し後に前記マーク付与手段を作動させてワークに所定のマークを付与することを特徴とする。   In order to achieve such an object, the invention described in claim 1 of the present invention includes a heating coil disposed at a quenching part and an annealing part of a work supported by a supporting means, and a high frequency having a predetermined frequency in the heating coil. A high-frequency power source for supplying a current; a cooling unit capable of cooling the workpiece; a mark applying unit that applies a predetermined mark to the workpiece; and a control unit that controls the mark. The control unit includes the high-frequency power source. A high frequency current for quenching is supplied from a power source to the heating coil to quench the quenching portion of the workpiece, and after quenching, a high frequency current for annealing is supplied from the high frequency power source to the heating coil to anneal the workpiece. The part is annealed, and at least after the work is annealed, the mark applying means is operated to apply a predetermined mark to the work.

また、請求項２に記載の発明は、前記高周波電源が、焼入れ用の高周波電流を前記加熱コイルに供給可能な第１電源部と、焼鈍し用の高周波電流を前記加熱コイルに供給可能な第２電源部を有することを特徴とする。さらに、請求項３に記載の発明は、前記マーク付与手段が、ワークに所定色の塗料を塗布する塗料塗布装置か、あるいはワークに所定の刻印を施す刻印装置であることを特徴とする。また、請求項４に記載の発明は、前記マーク付与手段で付与されたマークを検出可能なマーク検出手段を備え、前記制御手段が、前記マーク検出手段で検出されたマークに基づいてワークが良品か不良品かを判定することを特徴とする。   According to a second aspect of the present invention, there is provided a first power supply unit capable of supplying a high frequency current for quenching to the heating coil, and a first power source capable of supplying a high frequency current for annealing to the heating coil. It has 2 power supply parts. Furthermore, the invention described in claim 3 is characterized in that the mark applying means is a paint application device for applying a predetermined color of paint to a workpiece or a marking device for applying a predetermined marking to the workpiece. According to a fourth aspect of the present invention, there is provided mark detection means capable of detecting the mark applied by the mark application means, and the control means is a non-defective product based on the mark detected by the mark detection means. Or a defective product.

本発明のうち請求項１に記載の発明によれば、制御手段の制御によりワークを焼入れし、この焼入れに略連続状態で焼鈍しすると共に、ワークの焼鈍し後にマーク付与手段を作動させてワークに所定のマークを付与するため、ワークの焼入れと焼鈍しを１台の装置で略連続した一つの作業サイクル内で行うことができて、焼入れ焼鈍し作業の能率向上を図ることができると共に、焼鈍し後のマークにより焼入れ焼鈍し不良品等の後工程への供給を防止することができて、良好な焼入れや焼鈍し品質のワークを容易かつ安定して得ることができる。   According to the invention described in claim 1 of the present invention, the workpiece is quenched by the control of the control means, and the workpiece is annealed in a substantially continuous state, and after the workpiece is annealed, the mark applying means is operated to activate the workpiece. In order to give a predetermined mark to the workpiece, quenching and annealing of the workpiece can be performed in one continuous work cycle with a single device, and the efficiency of quenching and annealing can be improved. The marks after annealing can prevent quenching and annealing and supply to post-processes such as defective products, and can easily and stably obtain a workpiece with good quenching and annealing quality.

また、請求項２に記載の発明によれば、請求項１に記載の発明の効果に加え、高周波電源が焼入れ用の高周波電流を加熱コイルに供給可能な第１電源部と、焼鈍し用の高周波電流を加熱コイルに供給可能な第２電源部を有するため、第１電源部と第２電源部から焼入れ用もしくは焼鈍し用の所定周波数で所定出力の高周波電流を加熱コイルに確実に供給することができる。   According to the second aspect of the invention, in addition to the effect of the first aspect of the invention, the high frequency power source can supply the quenching high frequency current to the heating coil, and the annealing power source. Since it has the 2nd power supply part which can supply a high frequency current to a heating coil, the high frequency current of a predetermined output is reliably supplied to a heating coil with the predetermined frequency for hardening or annealing from the 1st power supply part and the 2nd power supply part. be able to.

また、請求項３に記載の発明によれば、請求項１または２に記載の発明の効果に加え、マーク付与手段が、ワークに所定色の塗料を塗布する塗料塗布装置かあるいはワークに所定の刻印を施す刻印装置であるため、塗料や刻印によりマークをワークの所定部位に確実に付与できて、一層良好な焼入れや焼鈍し品質のワークを容易かつ安定して得ることができる。   According to the invention described in claim 3, in addition to the effect of the invention described in claim 1 or 2, the mark imparting means is a paint application device for applying a predetermined color paint to the work, or a predetermined work is applied to the work. Since it is a marking device that performs marking, a mark can be reliably applied to a predetermined part of a workpiece by paint or stamping, and a workpiece with better quenching and annealing quality can be obtained easily and stably.

さらに、請求項４に記載の発明によれば、請求項１ないし３に記載の発明の効果に加え、制御手段がマーク検出手段で検出されたマークに基づいてワークが良品か不良品かを判定するため、マーク検出手段でワークの良品と不良品とを高精度に検出できて、不良品の後工程への供給を確実に防止することができる。   Furthermore, according to the invention described in claim 4, in addition to the effects of the invention described in claims 1 to 3, the control means determines whether the work is a good product or a defective product based on the mark detected by the mark detection device. Therefore, the mark detection means can detect the non-defective product and the defective product with high accuracy, and reliably prevent the defective product from being supplied to the subsequent process.

本発明に係わる高周波誘導加熱装置の概略構成図Schematic configuration diagram of a high-frequency induction heating apparatus according to the present invention 同その高周波電源の概略構成図Schematic configuration diagram of the high-frequency power supply 同マーク付与手段の説明図Explanatory drawing of the mark giving means 同他のマーク付与手段の説明図Explanatory drawing of other mark giving means 同焼入れ焼鈍し作業の工程図Process diagram of the quench annealing process 同そのマーキング工程のフローチャートFlow chart of the marking process

以下、本発明を実施するための形態を図面に基づいて詳細に説明する。
図１〜図６は、本発明に係わる高周波誘導加熱装置の一実施形態を示している。図１に示すように、高周波誘導加熱装置１は、例えばギヤシャフトやタービン軸等からなる軸状ワークＷ（ワークＷという）の上下端部を支持する支持手段としての上支持部材２及び下支持部材３と、上支持部材２を所定方向に移動（作動）させてワークＷをクランプするワーククランプ装置４と、下支持部材３を所定方向に回転させるワーク回転装置５と、ワークＷの焼入れ焼鈍し部位Ｗａの外周側に配置された加熱コイル６を備えている。 DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the drawings.
1-6 has shown one Embodiment of the high frequency induction heating apparatus concerning this invention. As shown in FIG. 1, the high frequency induction heating apparatus 1 includes an upper support member 2 and a lower support as support means for supporting upper and lower ends of a shaft-shaped work W (work W) made of, for example, a gear shaft or a turbine shaft. The workpiece 3, the workpiece clamping device 4 that clamps the workpiece W by moving (operating) the upper support member 2 in a predetermined direction, the workpiece rotating device 5 that rotates the lower support member 3 in a predetermined direction, and quenching annealing of the workpiece W The heating coil 6 is provided on the outer peripheral side of the soldering portion Wa.

また、高周波誘導加熱装置１は、前記加熱コイル６を前記焼入れ焼鈍し部位Ｗａに沿って移動させるコイル移動装置７と、加熱コイル６に一体的に設けられた冷却ジャケット８と共に冷却手段を構成して加熱コイル６に冷却水を供給する冷却水供給装置９と、前記加熱コイル６に２種類の所定周波数の高周波電流を供給する高周波電源装置１０（高周波電源）と、ワークＷの非焼入れ焼鈍し部位Ｗｂに後述するマーク１２を付与するマーク付与装置１１（マーク付与手段）と、このワークＷに付与されたマーク１２を検出可能なマーク検出装置１３（マーク検出手段）と、これらの各装置を制御する制御装置１４（制御手段）等を備えている。   The high frequency induction heating device 1 constitutes a cooling means together with a coil moving device 7 for moving the heating coil 6 along the portion Wa after quenching and annealing, and a cooling jacket 8 provided integrally with the heating coil 6. A cooling water supply device 9 for supplying cooling water to the heating coil 6, a high-frequency power supply device 10 (high-frequency power supply) for supplying high-frequency currents of two kinds of predetermined frequencies to the heating coil 6, and non-quenching annealing of the workpiece W A mark applying device 11 (mark applying device) for applying a mark 12 to be described later to the part Wb, a mark detecting device 13 (mark detecting device) capable of detecting the mark 12 applied to the workpiece W, and each of these devices A control device 14 (control means) for controlling is provided.

前記制御装置１４は、ＣＰＵ１４ａ、ＲＯＭ１４ｂ、ＲＡＭ１４ｃ、良品表示灯１５及び不良品表示灯品１６等を有し、その入力側には、前記加熱コイル６の下限位置と上限位置とを検知可能な図示しないセンサが接続され、その出力側には、前記ワーククランプ装置４、ワーク回転装置５、加熱コイル６、コイル移動装置７、冷却水供給装置９、高周波電源装置１０、マーク付与装置１１等が接続されている。また、制御装置１４には、前記マーク検出装置１３が接続されると共に、後述する焼入れや焼鈍しの条件を入力可能な図示しない入力装置等が接続されている。   The control device 14 includes a CPU 14a, a ROM 14b, a RAM 14c, a non-defective indicator lamp 15, a defective indicator lamp 16, and the like, and the input side thereof can detect the lower limit position and the upper limit position of the heating coil 6. The workpiece clamping device 4, the workpiece rotating device 5, the heating coil 6, the coil moving device 7, the cooling water supply device 9, the high frequency power supply device 10, the mark applying device 11, and the like are connected to the output side. Has been. The control device 14 is connected to the mark detection device 13 and an input device (not shown) capable of inputting conditions for quenching and annealing described later.

前記高周波電源装置１０は、図２（ａ）に示すように、焼入れ用の高周波電流を発生可能な第１電源部としての第１インバータ１７ａと、焼鈍し用の高周波電流を発生可能な第２電源部としての第２インバータ１７ｂと、この両インバータ１７ａ、１７ｂの出力端子に接続された切替器１８等を有している。第１インバータ１７ａ及び第２インバータ１７ｂは、トランジスタ、ＭＯＳＦＥＴ、ＩＧＢＴ等の半導体スイッチング素子を、例えばフルブリッジ接続したインバータ回路で構成され、その入力側が前記制御装置１４に接続され、その出力側が所定形態の切替器１８の一方の入力端子にそれぞれ接続されている。   As shown in FIG. 2A, the high-frequency power supply device 10 includes a first inverter 17a as a first power supply unit capable of generating a high-frequency current for quenching, and a second inverter capable of generating a high-frequency current for annealing. It has the 2nd inverter 17b as a power supply part, the switch 18 etc. which were connected to the output terminal of both these inverters 17a and 17b. The first inverter 17a and the second inverter 17b are configured by an inverter circuit in which semiconductor switching elements such as transistors, MOSFETs, IGBTs, and the like are connected in a full bridge, for example. The input side is connected to the control device 14, and the output side is a predetermined form. Are connected to one input terminal of each switch 18.

また、切替器１８の出力端子は、図示しない銅板やケーブル等の導体を介して前記加熱コイル６に接続されている。そして、この高周波電源装置１０は、制御装置１４からの制御信号により、第１インバータ１７ａと第２インバータ１７ｂが作動状態に設定されると共に、制御装置１４の制御信号で切替器１８が所定側に切替えられることにより、第１インバータ１７ａによる高周波電流かもしくは第２インバータ１７ｂによる高周波電流が加熱コイル６に供給、すなわち加熱コイル６に第１インバータ１７ａによる焼入れ用の高周波電流かもしくは第２インバータ１７ｂによる焼鈍し用の高周波電流が供給されるようになっている。   The output terminal of the switch 18 is connected to the heating coil 6 through a conductor such as a copper plate or a cable (not shown). In the high-frequency power supply device 10, the first inverter 17 a and the second inverter 17 b are set to the operating state by the control signal from the control device 14, and the switch 18 is set to the predetermined side by the control signal from the control device 14. By switching, the high frequency current by the first inverter 17a or the high frequency current by the second inverter 17b is supplied to the heating coil 6, that is, the heating coil 6 is quenched by the first inverter 17a or by the second inverter 17b. A high frequency current for annealing is supplied.

なお、高周波電源装置１０は、この構成に限定されず、例えば図２（ｂ）に示すように構成することもできる。すなわち、この高周波電源装置１０は、半導体スイッチング素子のフルブリッジ接続による一つのインンバータ回路２０と、このインバータ回路２０を作動（オン・オフ）させる第１発振回路２１ａ及び第２発振回路２１ｂと、両発振回路２１ａ、２１ｂとインバータ回路２０間に接続された切替器２２等を有している。この例の場合、インバータ回路２０と第１発振回路２１ａにより第１電源部が形成され、インバータ回路２０と第２発振回路２１ｂにより第２電源部が形成されている。   The high-frequency power supply device 10 is not limited to this configuration, and can be configured as shown in FIG. 2B, for example. That is, the high-frequency power supply device 10 includes one inverter circuit 20 based on a full bridge connection of semiconductor switching elements, a first oscillation circuit 21a and a second oscillation circuit 21b that operate (turn on / off) the inverter circuit 20, A switch 22 and the like connected between the oscillation circuits 21a and 21b and the inverter circuit 20 are included. In this example, the inverter circuit 20 and the first oscillation circuit 21a form a first power supply unit, and the inverter circuit 20 and the second oscillation circuit 21b form a second power supply unit.

そして、制御装置１４の制御信号によりインバータ回路２０と両発振回路２１ａ、２１ｂを作動状態に設定すると共に、制御装置１４の制御信号で切替器２２を所定側に切替えることにより、インバータ回路２０の発振周波数が所定に設定される。これにより、インバータ回路２０の出力端子から加熱コイル６に供給される高周波電流が第１発振回路２１ａによる焼入れ用の高周波電流かもしくは第２発振回路２１ｂによる焼鈍し用の高周波電流かに設定されることになる。   Then, the inverter circuit 20 and both the oscillation circuits 21a and 21b are set to the operating state by the control signal of the control device 14, and the switch 22 is switched to a predetermined side by the control signal of the control device 14, thereby oscillating the inverter circuit 20. The frequency is set to a predetermined value. Thereby, the high-frequency current supplied from the output terminal of the inverter circuit 20 to the heating coil 6 is set to the high-frequency current for quenching by the first oscillation circuit 21a or the high-frequency current for annealing by the second oscillation circuit 21b. It will be.

なお、この例の場合は、切替器２２の接続は、両発振回路２１ａ、２１ｂとインバータ回路２０間に限らず、図２（ｂ）の二点鎖線で示すように、両発振回路２１ａ、２１ｂの入力側に接続することも可能である。この例の切替器２２としては、切替器２２自体に高電流が流れないため、例えば応答性（切替性）の良好な半導体スイッチ等を使用することができる。このように、高周波電源装置１０としては、焼入れ用の高周波電流と焼鈍し用の高周波電流を加熱コイル６に供給可能であれば良く、例えば１つのインバータ回路や発振回路を備えて、その発振周波数を決定する電気部品の特性値を切り替えることにより、２種類の周波数の高周波電流を発生させる構成とする等、適宜の回路構成を採用することができる。   In the case of this example, the connection of the switch 22 is not limited to between the two oscillation circuits 21a and 21b and the inverter circuit 20, but as shown by the two-dot chain line in FIG. 2B, both the oscillation circuits 21a and 21b. It is also possible to connect to the input side. As the switch 22 of this example, since a high current does not flow through the switch 22 itself, for example, a semiconductor switch having a good response (switchability) can be used. As described above, the high-frequency power supply device 10 only needs to be able to supply a high-frequency current for quenching and a high-frequency current for annealing to the heating coil 6. For example, the high-frequency power supply device 10 includes one inverter circuit or oscillation circuit and has an oscillation frequency thereof. It is possible to adopt an appropriate circuit configuration such as a configuration in which high-frequency currents of two types of frequencies are generated by switching the characteristic values of the electrical components that determine the above.

前記加熱コイル６は、図１に示すように、例えば平面視で円環形状（もしくは馬蹄形状）に形成され、ワークＷの焼入れ焼鈍し部位Ｗａの外周面に所定の隙間を有して配設されると共に、コイル移動装置７により焼入れ焼鈍し部位Ｗａの外周面に沿って軸方向（図１の矢印イ方向に）に移動可能に配設されている。また、加熱コイル６の例えば下面（もしくは上面）には、内部に冷却水流路が形成された円環状の前記冷却ジャケット８が一体的に配設され、この冷却ジャケット８の内周面には多数の冷却水噴射孔（図示せず）が形成されている。さらに、冷却ジャケット８の冷却水流路は、適宜のホースを介して前記冷却水供給装置９に接続されている。   As shown in FIG. 1, the heating coil 6 is formed in an annular shape (or a horseshoe shape), for example, in a plan view, and disposed with a predetermined gap on the outer peripheral surface of the workpiece W that is quenched and annealed. At the same time, the coil moving device 7 is disposed so as to be movable in the axial direction (in the direction of arrow A in FIG. 1) along the outer peripheral surface of the quenching and annealing portion Wa. Further, for example, the annular cooling jacket 8 having a cooling water flow passage formed therein is integrally provided on the lower surface (or upper surface) of the heating coil 6, and a large number of the cooling jacket 8 has an inner peripheral surface. The cooling water injection hole (not shown) is formed. Further, the cooling water flow path of the cooling jacket 8 is connected to the cooling water supply device 9 via an appropriate hose.

このように構成された加熱コイル６は、その両端が高周波電源装置１０に電気的に接続され、該電源装置１０が作動することにより、所定周波数の高周波電流が供給されると共に、前記冷却水供給装置９から冷却水がホースを介して、冷却ジャケット８の冷却水流路内に循環供給され、この冷却水が、冷却水噴射孔からワークＷに向けて噴射されるようになっている。また、加熱コイル６は、制御装置１４の制御信号でコイル移動装置７のモータの回転でスライダーがガイドに沿って上下動することにより、ワークＷの外周側の所定範囲（焼入れ焼鈍し部位Ｗａの範囲）内を上下動するようになっている。   The heating coil 6 configured in this manner is electrically connected at both ends to the high frequency power supply device 10, and when the power supply device 10 operates, a high frequency current of a predetermined frequency is supplied and the cooling water supply Cooling water is circulated and supplied from the device 9 into the cooling water flow path of the cooling jacket 8 via a hose, and this cooling water is jetted toward the workpiece W from the cooling water jet hole. In addition, the heating coil 6 is moved up and down along the guide by the rotation of the motor of the coil moving device 7 in response to a control signal from the control device 14, so that a predetermined range on the outer peripheral side of the workpiece W (the quenching annealing portion Wa) The range is moved up and down.

前記マーク付与装置１１は、図３に示すように、先端にノズル２３ｂが設けられ所定色の塗料が収容された塗料タンク２３ａと、この塗料タンク２３ａを図の矢印ロの如く移動させる駆動部２３ｃからなる塗料塗布装置２３で構成されている。そして、前記制御装置１４の制御信号により駆動部２３ｃが作動することにより、塗料タンク２３ａがワークＷ方向に移動して、そのノズル２３ｂから塗料が図３（ａ）の矢印ハの如く噴射されて、ワークＷの非焼入れ焼鈍し部位Ｗｂの所定位置に、図３（ｂ）に示すようにマーク１２として塗布されるようになっている。   As shown in FIG. 3, the mark applying device 11 includes a paint tank 23a provided with a nozzle 23b at the tip and containing paint of a predetermined color, and a drive unit 23c that moves the paint tank 23a as indicated by an arrow b in the figure. It is comprised by the coating material coating device 23 which consists of. Then, when the drive unit 23c is operated by the control signal of the control device 14, the paint tank 23a moves in the workpiece W direction, and the paint is ejected from the nozzle 23b as shown by the arrow C in FIG. As shown in FIG. 3B, the workpiece 12 is applied as a mark 12 at a predetermined position of the non-quenched and annealed portion Wb of the workpiece W.

なお、マーク付与装置１１としては、図３に示す塗料塗布装置２３に限定されず、例えば図４に示す刻印装置２４を使用することもできる。この刻印装置２４は、レーザを照射可能なレーザ発生部２４ａと、このレーザ発生部２４ａの先端に設けられた発射ノズル２４ｂと、駆動部２４ｃ等を有し、制御装置１４の制御信号で駆動部２４ｃが作動してレーザ発生部２４ａからレーザが発射ノズル２４ｂを介して、図４（ａ）に示すように矢印ニの如くワークＷに向けて発射される。このレーザでワークＷに溝（凹部）からなる例えば円形の刻印が施されて、図４（ｂ）に示すようなマーク１２が付与されるようになっている。このように、マーク付与装置１１としては、ワークＷの非焼入れ焼鈍し部位Ｗｂに色や凹凸、あるいは貼付可能なシール等により、後述するマーク検出装置１３や作業者の目視で識別可能なマーク１２を付与可能な適宜の付与装置を使用することができる。   In addition, as the mark provision apparatus 11, it is not limited to the coating material coating apparatus 23 shown in FIG. 3, For example, the marking apparatus 24 shown in FIG. 4 can also be used. The marking device 24 includes a laser generator 24a capable of irradiating a laser, a firing nozzle 24b provided at the tip of the laser generator 24a, a drive unit 24c, and the like. As shown in FIG. 4 (a), a laser is emitted from the laser generator 24a through the emission nozzle 24b toward the work W as indicated by an arrow D. For example, a circular mark made of a groove (concave portion) is formed on the workpiece W by this laser, and a mark 12 as shown in FIG. 4B is provided. As described above, the mark applying device 11 is a mark 12 that can be identified visually by a mark detection device 13 or an operator, which will be described later, by a color, unevenness, or a stickable sticker on the non-quenched and annealed portion Wb of the workpiece W. Any suitable applicator capable of imparting can be used.

前記マーク検出装置１３は、例えば撮像カメラで構成され、ワークＷの非焼入れ焼鈍し部位Ｗｂに付与された前記マーク１２を検出し、その検出信号を前記制御装置１４に出力するようになっている。なお、このマーク検出装置１３は、必ずしも必要ではなく、ワーク付与装置１１で付与されたマーク１２を自動的に認識して後工程である研磨や歪み取り工程に流す（供給する）場合に好適であるが、例えばマーク１２を作業者が目視で確認して後工程に流す作業の場合には、省略することもできる。   The mark detection device 13 is composed of, for example, an imaging camera, detects the mark 12 applied to the non-quenching annealed portion Wb of the workpiece W, and outputs a detection signal to the control device 14. . The mark detection device 13 is not always necessary, and is suitable for automatically recognizing the mark 12 applied by the workpiece applying device 11 and supplying (supplying) it to a polishing or distortion removing process, which is a subsequent process. However, for example, in the case of an operation in which the operator visually confirms the mark 12 and flows it to the subsequent process, it can be omitted.

次に、前記高周波誘導加熱装置１を使用したワークＷの焼入れ焼鈍し作業の一例を図５の工程図及び図６のフローチャートに基づいて説明する。なお、以下の説明では、前記高周波電源装置１０が図２（ａ）に示す構成であるものとする。先ず、前記ワークＷは、図１に示すように、所定の外形形状に形成されて、所定長さの焼入れ焼鈍し部位Ｗａと、この焼入れ焼鈍し部位Ｗａの下部に形成された非焼入れ焼鈍し部位Ｗｂと、上下の支持部Ｗｃ、Ｗｄ等を有している。   Next, an example of the work of quenching and annealing the workpiece W using the high frequency induction heating apparatus 1 will be described based on the process diagram of FIG. 5 and the flowchart of FIG. In the following description, it is assumed that the high-frequency power supply device 10 has the configuration shown in FIG. First, as shown in FIG. 1, the workpiece W is formed in a predetermined outer shape, and is quenched and annealed at a predetermined length, and non-quenched annealed below the quench annealed portion Wa. It has a portion Wb and upper and lower support portions Wc, Wd and the like.

そして、加熱コイル６を下限位置である初期位置にセットし、この加熱コイル６の内側に、ワークＷを上方から挿入してその下部の支持部Ｗｄを下支持部材３で支持すると共に、ワークＷの上部の支持部Ｗｃを上支持部材２で支持し、この状態で制御装置１４の制御信号によりワーククランプ装置４を作動させてワークＷをクランプ（Ｋ０１）する。ワークＷがクランプされたら、制御装置１４の制御信号で高周波電源装置１０の切替器１８を焼入れ側である第１インバータ１７ａ側に切り替えて、高周波電源装置１０を焼入れ側に設定（Ｋ０２）し、第１インバータ１７ａ、切替器１８を介して加熱コイル６に高周波電流を供給して、焼入れ作業を開始（Ｋ０３）する。   Then, the heating coil 6 is set at the initial position which is the lower limit position, and the workpiece W is inserted into the heating coil 6 from above and the lower support member 3 is supported by the lower support member 3. The upper support member 2 is supported by the upper support member 2, and in this state, the workpiece clamping device 4 is operated by a control signal from the control device 14 to clamp the workpiece W (K01). When the workpiece W is clamped, the switch 18 of the high frequency power supply device 10 is switched to the first inverter 17a side which is the quenching side by the control signal of the control device 14, and the high frequency power supply device 10 is set to the quenching side (K02), A high-frequency current is supplied to the heating coil 6 via the first inverter 17a and the switch 18, and the quenching operation is started (K03).

このとき、焼入れに使用される高周波電流は、その周波数が例えば１００〜２００ＫＨｚに設定される。また、焼入れ作業は、制御装置１４の制御信号でワーク回転装置５を作動させてワークＷを回転させつつ、高周波電源装置１０を作動させて高周波電流により焼入れ焼鈍し部位Ｗａを所定温度まで誘導加熱し、かつ冷却水供給装置９を作動させて冷却ジャケット８の冷却水噴射孔から冷却水を加熱部位に噴射して急速冷却することにより行われる。また、この焼入れ作業は、制御装置１４の制御信号によるコイル移動装置７の作動で、加熱コイル６をワークＷの焼入れ焼鈍し部位Ｗａの下部から上部に向けて上昇移動させることによって略連続的に行われる。   At this time, the frequency of the high-frequency current used for quenching is set to 100 to 200 KHz, for example. In the quenching operation, the work rotating device 5 is operated by the control signal of the control device 14 to rotate the work W, while the high frequency power supply device 10 is operated to quench and anneal by the high frequency current, and the part Wa is induction heated to a predetermined temperature. The cooling water supply device 9 is operated and cooling water is sprayed from the cooling water injection holes of the cooling jacket 8 to the heating portion to be rapidly cooled. In addition, this quenching operation is performed substantially continuously by moving the heating coil 6 from the lower part of the part Wa to the upper part by quenching and annealing the work W by the operation of the coil moving device 7 according to the control signal of the control device 14. Done.

そして、加熱コイル６が上昇して上限位置に達したら、制御装置１４の制御信号により加熱コイル６が停止し、これにより焼入れ作業が終了（Ｋ０４）する。焼入れ作業が終了したら、制御装置１４の制御信号によりコイル移動装置７が作動し、加熱コイル６が初期位置（下限位置）まで下降して該位置に停止する。この状態で、制御装置１４の制御信号により、高周波電源装置１０の切替器１８を焼鈍し側である第２インバータ１７ｂ側に切り替えて、高周波電源装置１０を焼鈍し側に設定（Ｋ０５）して、焼鈍し作業を開始（Ｋ０６）する。   And if the heating coil 6 raises and reaches an upper limit position, the heating coil 6 will be stopped by the control signal of the control apparatus 14, and a hardening operation will be complete | finished by this (K04). When the quenching operation is completed, the coil moving device 7 is actuated by the control signal of the control device 14, and the heating coil 6 is lowered to the initial position (lower limit position) and stopped at the position. In this state, the switch 18 of the high frequency power supply device 10 is switched to the second inverter 17b side, which is the annealing side, by the control signal of the control device 14, and the high frequency power supply device 10 is set to the annealing side (K05). Then, the annealing work is started (K06).

この焼鈍しに使用される高周波電流は、その周波数が焼入れより低い例えば３０ＫＨｚ程度に設定され、この焼鈍し作業は、ワークＷを回転させつつ高周波電源装置１０を作動させて高周波電流により焼入れ焼鈍し部位Ｗａを所定温度まで誘導加熱することで行われる。また、コイル移動装置７の作動で加熱コイル６をワークＷの焼入れ焼鈍し部位Ｗａの下部から上部に向けて上昇移動させることによって略連続的に行われる。この焼鈍し作業時においては、当然ながら冷却水の噴射による冷却は必要なく、冷却水供給装置９は非作動となっている。   The high-frequency current used for this annealing is set to, for example, about 30 KHz, the frequency of which is lower than that of quenching. This annealing operation is performed by quenching and annealing with the high-frequency current by operating the high-frequency power supply device 10 while rotating the workpiece W. This is performed by induction heating the part Wa to a predetermined temperature. Further, the heating coil 6 is quenched and annealed by the operation of the coil moving device 7 and moved upwardly from the lower part to the upper part of the portion Wa, so that the heating coil 6 is performed substantially continuously. During the annealing operation, naturally, cooling by jetting of cooling water is not necessary, and the cooling water supply device 9 is inactive.

そして、加熱コイル６が再び上昇して上限位置に達したら、制御装置１４の制御信号により加熱コイル６が停止し、これにより焼鈍し作業が終了（Ｋ０７）する。焼鈍し作業が終了したら、制御装置１４の制御信号によりコイル移動装置７が作動して、加熱コイル６が初期位置まで下降して該位置に停止すると共に、制御装置１４の制御信号により前記マーク付与装置１１が作動してワークＷにマーキング（Ｋ０８）する。   When the heating coil 6 rises again and reaches the upper limit position, the heating coil 6 is stopped by a control signal from the control device 14, thereby annealing and finishing the work (K07). When the annealing operation is completed, the coil moving device 7 is actuated by the control signal of the control device 14, the heating coil 6 is lowered to the initial position and stopped at that position, and the mark application is performed by the control signal of the control device 14. The apparatus 11 operates to mark the workpiece W (K08).

このマーキングは、制御装置１４によって図６に示すように制御されて行われる。すなわち、マーキングのプログラムが開始（Ｓ０８１）されると、焼鈍し終了か否かが判断（Ｓ０８２）され、この判断Ｓ０８２は「ＹＥＳ」になるまで繰り返され、図５の工程Ｋ０７が実行されて「ＹＥＳ」となった場合は、焼入れと焼鈍しの条件が正常が否かが判断（Ｓ０８３）される。この条件とは、図５の工程Ｋ０３、Ｋ０４と工程Ｋ０６、Ｋ０７の焼入れ作業と焼鈍し作業時に、高周波電源装置１０から出力されていた電流値や周波数及びその供給時間等であり、これらの条件が判断Ｓ０８３で前記入力装置により入力設定されている条件と一致しているか（あるいは予め設定した範囲内か）否かが判断されることになる。   This marking is performed under the control of the control device 14 as shown in FIG. That is, when the marking program is started (S081), it is determined whether or not the annealing is finished (S082). This determination S082 is repeated until “YES”, and the process K07 of FIG. If “YES”, it is determined whether or not the quenching and annealing conditions are normal (S083). These conditions are the current value and frequency output from the high-frequency power supply apparatus 10 during the quenching and annealing operations in steps K03 and K04 and steps K06 and K07 in FIG. In step S083, it is determined whether or not the condition matches the condition set by the input device (or is within a preset range).

判断Ｓ０８３で「ＹＥＳ」の場合、すなわち焼入れや焼鈍し時の条件が予め設定されている条件と一致している場合は、制御装置１４の制御信号によりマーク付与装置１１を作動（Ｓ０８４）させてワークＷにマーク１２を付与、すなわちマーキングする。そして、ワークＷにマーキングしたら制御装置１４の制御信号によりマーク検出装置１３を作動（Ｓ０８５）させて、その信号が制御装置１４に入力される。制御装置１４は、マーク検出装置１３からマーク１２に関する信号が入力されると、マーキングが正常か否かを判断（Ｓ０８６）する。この判断Ｓ０８６で「ＹＥＳ」の場合、すなわち入力されたマーク１２の検出信号が予め設定されているマークと一致して、検出したマーク１２の色が所定の色であったり検出した刻印の形が所定の形である場合は、ワークＷを良品と判定（Ｓ０８７）し、例えば制御装置１４の良品表示灯１５を点灯させ、例えば良品箱に収納する。   If “YES” in the determination S083, that is, if the conditions at the time of quenching or annealing match the preset conditions, the mark applying device 11 is operated by the control signal of the control device 14 (S084). A mark 12 is applied to the workpiece W, that is, marked. When the workpiece W is marked, the mark detection device 13 is operated by a control signal from the control device 14 (S085), and the signal is input to the control device 14. When the signal related to the mark 12 is input from the mark detection device 13, the control device 14 determines whether or not the marking is normal (S 086). If “YES” in this determination S086, that is, the detection signal of the input mark 12 coincides with a preset mark, the detected mark 12 has a predetermined color, or the shape of the detected inscription is If the shape is a predetermined shape, the workpiece W is determined to be non-defective (S087), and the non-defective indicator lamp 15 of the control device 14 is turned on, for example, and stored in a non-defective box.

一方、判断Ｓ０８６で「ＮＯ」場合、すなわち入力されたマーク１２の検出信号が予め設定されているマークと一致せず、マーク１２の色や刻印が正常に検出できなかった場合は、ワークＷを不良品と判定（Ｓ０８８）し、例えば制御装置１４の不良品表示灯１６を点灯させ、不良品箱に収納する。また、前記判断Ｓ０８３で「ＮＯ」の場合、すなわち焼入れや焼鈍しの条件が正常でない場合も、ステップＳ０８８に移行して不良品判定され、一連のプログラムが終了（Ｓ０８９）する。つまり、焼入れと焼鈍しが所定の条件で正常に行われ、かつ所定のマーク１２が付与されたワークＷのみ、制御装置１４によって良品と判定されることになる。   On the other hand, if “NO” in the determination S 086, that is, if the input detection signal of the mark 12 does not match a preset mark and the color and the stamp of the mark 12 cannot be detected normally, the workpiece W is changed. It is determined as a defective product (S088), for example, the defective product indicator lamp 16 of the control device 14 is turned on and stored in a defective product box. If “NO” in the determination S083, that is, if the conditions of quenching or annealing are not normal, the process proceeds to step S088, where a defective product is determined, and the series of programs ends (S089). That is, only the workpiece W to which quenching and annealing are normally performed under a predetermined condition and the predetermined mark 12 is given is determined as a non-defective product by the control device 14.

そして、このようにして図５の工程Ｋ０８のマーキングが行われると、制御装置１４の制御信号により、ワーククランプ装置４を作動させてワークＷをアンクランプ（Ｋ０９）し、上下支持部材２、３からワークＷを取り出すことにより、ワークＷの焼入れ焼鈍し作業が完了する。これにより、ワークＷの焼入れと焼鈍し作業が、１台の高周波誘導加熱装置１を使用し一つの作業サイクル内で略連続した状態で行われることになる。なお、以上の焼入れ焼鈍し作業においては、焼鈍し作業時に加熱コイル６を下降させて初期位置に設定した状態で、すなわち焼入れと焼鈍しを加熱コイル６の上昇動作によって行ったが、例えば、焼鈍し作業を加熱コイル６の上限位置から開始させ、加熱コイル６が下降・停止した時点で終了させるようにしても良い。   When the marking in step K08 of FIG. 5 is performed in this way, the workpiece clamping device 4 is operated by the control signal of the control device 14 to unclamp the workpiece W (K09), and the upper and lower support members 2, 3 are operated. By taking out the workpiece W from the workpiece, the quenching and annealing of the workpiece W is completed. Thereby, the hardening and annealing work of the workpiece W is performed in a substantially continuous state using one high-frequency induction heating device 1 within one work cycle. In the above quenching and annealing work, the heating coil 6 was lowered and set to the initial position during the annealing work, that is, quenching and annealing were performed by the raising operation of the heating coil 6. However, the work may be started from the upper limit position of the heating coil 6 and terminated when the heating coil 6 is lowered and stopped.

このように、前記高周波誘導加熱装置１によれば、制御装置１４により、高周波電源装置１０の第１電源部と冷却水供給装置９を制御してワークＷの焼入れ焼鈍し部位Ｗａを焼入れし、この焼入れに略連続状態で同電源装置１０の第２電源部を制御して焼入れ焼鈍し部位Ｗａを焼鈍しするため、ワークＷの焼入れと焼鈍しを１台の装置で略連続した一つの作業サイクル内で行うことができて、焼入れ焼鈍し作業の能率向上を図ることができる。   Thus, according to the high frequency induction heating device 1, the control device 14 controls the first power supply unit of the high frequency power supply device 10 and the cooling water supply device 9 to quench the quenching and annealing portion Wa of the work W, In order to quench the quenching and annealing part Wa by controlling the second power supply unit of the power supply device 10 in a substantially continuous state for this quenching, one work in which quenching and annealing of the workpiece W are substantially continuously performed by one apparatus. It can be performed within a cycle, and the efficiency of the quenching and annealing work can be improved.

また、高周波電源装置１０が焼入れ用と焼鈍し用の２つの電源部を有し、１台の加熱装置１で焼入れと焼鈍しを略連続した状態で行うことができるため、各電源部から焼入れもしくは焼鈍し専用の高周波電流を加熱コイル６に確実に供給することができ、焼入れ品質自体や焼鈍し品質自体を精度良く行うことができる。また、焼入れ終了と焼入れ開始までの時間を極力短くすることができて、焼鈍し開始前における焼入れ部位の品質低下等を抑制することができる。   Moreover, since the high frequency power supply device 10 has two power supply units for quenching and annealing, and the single heating device 1 can perform quenching and annealing in a substantially continuous state, quenching from each power supply unit Alternatively, a dedicated high-frequency current for annealing can be reliably supplied to the heating coil 6, and the quenching quality itself and the annealing quality itself can be accurately performed. Moreover, the time from the end of quenching to the start of quenching can be shortened as much as possible, and deterioration in the quality of the quenching site before the start of annealing can be suppressed.

また、加熱コイル６が焼入れ焼鈍し部位Ｗａに沿って移動可能に配設されると共に、この加熱コイル６に冷却ジャケット８が一体的に設けられているため、例えば軸状のワークＷであっても、所定長さの焼入れ焼鈍し部位Ｗａに沿って加熱コイル６を移動させながら、かつワークＷを回転させつつ行うことができて、ワークＷの焼入れ焼鈍し作業の能率を一層向上させたり、焼入れ焼鈍し部位の外周全域において均一な加熱状態を得ることができる。これらにより、良好な焼入れや焼鈍し品質のワークＷを容易かつ安定して得ることが可能となる。   Further, since the heating coil 6 is disposed so as to be movable along the quenching and annealing portion Wa and the cooling jacket 8 is integrally provided on the heating coil 6, for example, an axial workpiece W is provided. Can be performed while moving the heating coil 6 along the quenching annealing portion Wa of a predetermined length and rotating the workpiece W, further improving the efficiency of the quenching and annealing operation of the workpiece W, A uniform heating state can be obtained in the entire outer periphery of the quench annealing part. Accordingly, it is possible to easily and stably obtain a workpiece W having good quenching and annealing quality.

また、ワークＷの焼鈍し後にマーク付与装置１１を作動させてワークＷにマーク１２が付与されるため、このマーク１２によりワークＷが焼入れ焼鈍しされた製品であることを明確に認識できて、研磨や歪み取り等の後工程の作業において、このマークのある製品についてのみ作業を行えば良く、結果として、良好な焼入れ焼鈍し品質のワークＷを安定かつ容易に得ることが可能になる。特に、制御装置１４がマーク検出装置１３で検出されたマーク１２に基づいてワークＷが良品か不良品かを判定するため、制御装置１４により良品、不良品を機械的に高精度に判定することができて、不良品の良品への混入や、不良品の後工程への供給を確実に防止することができる。   In addition, since the mark 12 is applied to the workpiece W by operating the mark applying device 11 after the workpiece W is annealed, it is possible to clearly recognize that the workpiece W is a product obtained by quenching and annealing with the mark 12. In post-process work such as polishing and distortion removal, it is only necessary to work on products with this mark. As a result, it is possible to stably and easily obtain a work W of good quenching and annealing quality. In particular, since the control device 14 determines whether the workpiece W is a non-defective product or a defective product based on the mark 12 detected by the mark detection device 13, the control device 14 mechanically determines a non-defective product or a defective product. Therefore, it is possible to reliably prevent the defective product from being mixed into a non-defective product and being supplied to the subsequent process of the defective product.

また、マーク付与装置１１として、ワークＷに所定色の塗料を塗布する塗料塗布装置２３かあるいはワークＷに所定の刻印を施す刻印装置２４が使用されるため、塗料や刻印によりマーク１２をワークＷの非焼入れ焼鈍し部位Ｗｂに確実に付与できて、マーク検出装置１３による検出精度を高めて、制御装置１４によるワークＷの良品、不良品の自動判定精度を高めることができたり、作業者による認識を高めることができて、一層良好な焼入れや焼鈍し品質を有するワークＷを容易かつ安定して得ることができる。   Further, as the mark applying device 11, a coating material application device 23 that applies a predetermined color coating material to the workpiece W or a marking device 24 that applies a predetermined marking to the workpiece W is used. Can be reliably applied to the non-quenched annealed portion Wb, the detection accuracy by the mark detection device 13 can be increased, and the automatic determination accuracy of non-defective and defective products of the workpiece W by the control device 14 can be increased. Recognition can be raised and the workpiece | work W which has much better quenching and annealing quality can be obtained easily and stably.

さらに、高周波電源装置１０１が第１インバータ１７ａ及び第２インバータ１７ｂと切替器１８等を有し、制御装置１４による切替器１８の制御により、第１インバータ１７ａもしくは第２インバータ１７ｂから加熱コイル６に所定周波数の高周波電流を供給するように構成すれば、焼入れ用の高周波電流と焼鈍し用の高周波電流を加熱コイル６に確実に供給することができる。また、高周波電源装置１０がインバータ回路２０と第１発振回路２１ａ及び第２発振回路２１ｂ等を有し、制御装置１４の制御により第１発振回路２１ａもしくは第２発振回路２１ｂを作動させて、インバータ回路２０から加熱コイル６に所定周波数の高周波電流を供給するように構成すれば、高周波電源装置１０のインバータ回路の数を減らしたり切替器２２の構成等を簡素化できて、該電源装置１０を安価に形成することができる。   Further, the high frequency power supply device 101 includes a first inverter 17a, a second inverter 17b, a switch 18 and the like, and the control device 14 controls the switch 18 to change the heating coil 6 from the first inverter 17a or the second inverter 17b. When configured to supply a high-frequency current having a predetermined frequency, the high-frequency current for quenching and the high-frequency current for annealing can be reliably supplied to the heating coil 6. The high frequency power supply device 10 includes an inverter circuit 20, a first oscillation circuit 21 a, a second oscillation circuit 21 b, and the like, and operates the first oscillation circuit 21 a or the second oscillation circuit 21 b under the control of the control device 14. If the circuit 20 is configured to supply a high-frequency current of a predetermined frequency to the heating coil 6, the number of inverter circuits of the high-frequency power supply device 10 can be reduced, the configuration of the switch 22 and the like can be simplified, and the power supply device 10 can be simplified. It can be formed at low cost.

なお、前記実施形態においては、焼入れと焼鈍しの終了後にマーク付与装置１３を作動させて後工程に供給するワークＷにマーキングしたが、例えば図５の二点鎖線で示すように、焼入れ後に焼入れ専用のマーキング（Ｋ１０）をし、焼鈍し後に焼鈍し専用のマーキング（Ｋ０８）をするようにしても良く、このようにすれば、ワークＷの焼入れ状態と焼鈍し状態とを個別に判定すること等が可能になる。   In the above-described embodiment, after the quenching and annealing are finished, the mark applying device 13 is operated to mark the workpiece W supplied to the subsequent process. For example, as shown by a two-dot chain line in FIG. The dedicated marking (K10) may be performed, and annealing may be performed after the annealing, and the dedicated marking (K08) may be performed. In this way, the hardened state and the annealed state of the workpiece W are individually determined. Etc. becomes possible.

また、前記実施形態においては、加熱コイル６をワークＷの焼入れ焼鈍し部位Ｗａに沿って上下方向に移動させつつ行ったが、本発明はこの構成に限定されず、ワークＷの焼入れ焼鈍し部位Ｗａの長さ等によっては、該部位Ｗａに対応した形状の加熱コイル６を所定位置に固定的に配置し、この加熱コイル６によって焼入れと焼鈍しを１サイクル内で略連続した状態で行うこともできる。さらに、前記実施形態における、加熱コイル６の形状、制御装置１４の構成等は一例であって、本発明の各発明に係わる要旨を逸脱しない範囲において適宜の構成を採用することができる。   Moreover, in the said embodiment, although the heating coil 6 performed quenching annealing of the workpiece | work W and moving it up and down along the site | part Wa, this invention is not limited to this structure, The quenching annealing site | part of the workpiece | work W Depending on the length of Wa or the like, the heating coil 6 having a shape corresponding to the portion Wa is fixedly disposed at a predetermined position, and the heating coil 6 performs quenching and annealing in a substantially continuous state within one cycle. You can also. Furthermore, the shape of the heating coil 6 and the configuration of the control device 14 in the above embodiment are merely examples, and appropriate configurations can be employed without departing from the spirit of the present invention.

本発明は、ギヤシャフト、タービン軸等の軸状ワークに限定されず、焼入れと焼鈍しが必要な略円柱形状や略角柱形状等の全てのワークに利用できる。   The present invention is not limited to shaft-shaped workpieces such as gear shafts and turbine shafts, but can be used for all workpieces having a substantially cylindrical shape or a substantially prismatic shape that require quenching and annealing.

１・・・高周波誘導加熱装置、２・・・上支持部材、３・・・下支持部材、４・・・ワーククランプ装置、５・・・ワーク回転装置、６・・・加熱コイル、７・・・コイル移動装置、８・・・冷却ジャケット、９・・・冷却水供給装置、１０・・・高周波電源装置、１１・・・マーク付与装置、１２・・・マーク、１３・・・マーク検出装置、１４・・・制御装置、１７ａ・・・第１インバータ、１７ｂ・・・第２インバータ、１８、２２・・・切替器、２０・・・インバータ回路、２１ａ・・・第１発振回路、２１ｂ・・・第２発振回路、２３・・・塗料塗布装置、２４・・・刻印装置、Ｗ・・・ワーク、Ｗａ・・・焼入れ焼鈍し部位、Ｗｂ・・・非焼入れ焼鈍し部位。   DESCRIPTION OF SYMBOLS 1 ... High frequency induction heating apparatus, 2 ... Upper support member, 3 ... Lower support member, 4 ... Work clamp apparatus, 5 ... Work rotating apparatus, 6 ... Heating coil, 7. ..Coil moving device, 8 ... cooling jacket, 9 ... cooling water supply device, 10 ... high frequency power supply device, 11 ... mark applying device, 12 ... mark, 13 ... mark detection Device, 14 ... control device, 17a ... first inverter, 17b ... second inverter, 18, 22 ... switch, 20 ... inverter circuit, 21a ... first oscillation circuit, 21b ... 2nd oscillation circuit, 23 ... Paint coating device, 24 ... Marking device, W ... Workpiece, Wa ... Quenching annealing part, Wb ... Non-quenching annealing part.

Claims (4)

支持手段で支持されたワークの焼入れ部位及び焼鈍し部位に配置された加熱コイルと、該加熱コイルに所定周波数の高周波電流を供給する高周波電源と、前記ワークを冷却可能な冷却手段と、前記ワークに所定のマークを付与するマーク付与手段と、これらを制御する制御手段と、を備え、
前記制御手段は、前記高周波電源から焼入れ用の高周波電流を前記加熱コイルに供給して前記ワークの焼入れ部位を焼入れし、該焼入れ後に前記高周波電源から焼鈍し用の高周波電流を前記加熱コイルに供給して前記ワークの焼鈍し部位を焼鈍しすると共に、少なくとも前記ワークの焼鈍し後に前記マーク付与手段を作動させてワークに所定のマークを付与することを特徴とする高周波誘導加熱装置。 A heating coil disposed at a quenching part and an annealing part of the work supported by the support means, a high-frequency power source for supplying a high-frequency current of a predetermined frequency to the heating coil, a cooling means capable of cooling the work, and the work A mark providing means for applying a predetermined mark to the control means, and a control means for controlling these,
The control means supplies a high frequency current for quenching from the high frequency power source to the heating coil to quench the quenching part of the workpiece, and supplies the high frequency current for annealing from the high frequency power source to the heating coil after the quenching. A high frequency induction heating apparatus characterized in that the annealing portion of the workpiece is annealed and at least after the workpiece is annealed, the mark applying means is operated to apply a predetermined mark to the workpiece. 前記高周波電源は、焼入れ用の高周波電流を前記加熱コイルに供給可能な第１電源部と、焼鈍し用の高周波電流を前記加熱コイルに供給可能な第２電源部を有することを特徴とする請求項１に記載の高周波誘導加熱装置。   The high-frequency power source includes a first power supply unit that can supply a high-frequency current for quenching to the heating coil, and a second power source unit that can supply a high-frequency current for annealing to the heating coil. Item 2. The high frequency induction heating apparatus according to Item 1. 前記マーク付与手段は、ワークに所定色の塗料を塗布する塗料塗布装置か、あるいはワークに所定の刻印を施す刻印装置であることを特徴とする請求項１または２に記載の高周波誘導加熱装置。   The high-frequency induction heating device according to claim 1 or 2, wherein the mark applying means is a paint application device that applies a predetermined color of paint to a workpiece or a marking device that applies a predetermined marking to the workpiece. 前記マーク付与手段で付与されたマークを検出可能なマーク検出手段を備え、前記制御手段は、前記マーク検出手段で検出されたマークに基づいてワークが良品か不良品かを判定することを特徴とする請求項１ないし３のいずれかに記載の高周波誘導加熱装置。   Mark detecting means capable of detecting a mark applied by the mark applying means, wherein the control means determines whether the workpiece is a non-defective product or a defective product based on the mark detected by the mark detecting device. The high frequency induction heating device according to any one of claims 1 to 3.
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