JP6001321B2

JP6001321B2 - Induction hardening equipment

Info

Publication number: JP6001321B2
Application number: JP2012109630A
Authority: JP
Inventors: 久保田　昇; 昇久保田
Original assignee: 富士電子工業株式会社
Priority date: 2012-05-11
Filing date: 2012-05-11
Publication date: 2016-10-05
Anticipated expiration: 2032-05-11
Also published as: JP2013237875A

Description

本発明は、長尺状の被加熱物を焼入れする高周波焼入装置に関するものである。 The present invention relates to an induction hardening apparatus for hardening a long object to be heated.

長尺状の被加熱物を高周波誘導焼入れする方法の一つとして、移動焼入れと称される焼入れ方法がある。移動焼入れ方法とは、長さが比較的短い加熱導体を、被加熱物の焼入れ対象部位の一部に対向させ、加熱導体と被加熱物を、被加熱物の長手方向に相対移動させることにより、被加熱物の焼入れ対象部位を部分的に順次誘導加熱し、さらに誘導加熱した箇所を順に冷却装置で急冷し、焼入れ対象部位を全長に渡って焼入れする方法である。 One method of induction-quenching a long object to be heated is a quenching method called transfer quenching. The moving quenching method is a method in which a heating conductor having a relatively short length is opposed to a part of a part to be quenched of the object to be heated, and the heating conductor and the object to be heated are relatively moved in the longitudinal direction of the object to be heated. In this method, the part to be quenched of the object to be heated is partially and sequentially heated by induction, and further the part that has been induction heated is quenched in turn by a cooling device, and the part to be quenched is quenched over the entire length.

移動焼入れ方法では、被加熱物全体を短時間で焼入れすることはできないが、１つの加熱導体で、長さの異なる被加熱物を焼入れすることができる。そのため、長さが異なる複数種類の加熱導体を用意する必要がないという利点がある。特許文献１には、移動焼入れ方法を実施することができる高周波加熱コイル体が開示されている。特許文献１に開示されている高周波加熱コイル体は、直線状の加熱導体部を有する。 In the moving quenching method, the entire object to be heated cannot be quenched in a short time, but objects to be heated having different lengths can be quenched with one heating conductor. Therefore, there is an advantage that it is not necessary to prepare a plurality of types of heating conductors having different lengths. Patent Document 1 discloses a high-frequency heating coil body capable of carrying out a moving quenching method. The high-frequency heating coil body disclosed in Patent Document 1 has a linear heating conductor portion.

特開２００１−３２９３１３号公報JP 2001-329313 A

本件出願人は、特許文献１に開示されているような高周波加熱コイル体（加熱導体）を有する高周波焼入装置で、断面が略矩形形状の長尺状の被加熱物１００の溝９８ａ，９８ｂを焼入れしてみた。
すなわち、図１２に示す高周波焼入装置１０１で、長尺状の被加熱物１００の側面１００ａ，１００ｂに設けられた溝９８ａ，９８ｂを焼入れした。被加熱物１００は、レール部材であり、溝９８ａ，９８ｂ内を車輪（図示せず）が走行する。
高周波焼入装置１０１は、高周波電流が供給される加熱導体９０，搬送装置９２，冷却液を噴射する冷却装置９４等を有している。 The applicant of the present application is an induction hardening apparatus having an induction heating coil body (heating conductor) as disclosed in Patent Document 1, and has a substantially rectangular cross-section of the elongated object to be heated 100a, 98b. I tried quenching.
That is, the grooves 98a and 98b provided on the side surfaces 100a and 100b of the elongated object 100 were quenched by the induction hardening apparatus 101 shown in FIG. The object to be heated 100 is a rail member, and a wheel (not shown) travels in the grooves 98a and 98b.
The induction hardening device 101 includes a heating conductor 90 to which a high frequency current is supplied, a transfer device 92, a cooling device 94 for injecting a coolant, and the like.

図１４に示すように、加熱導体９０は、被加熱物１００の溝９８ａ，９８ｂに近接対向する直線部９１ａ〜９１ｄを有する。直線部９１ａ，９１ｂ同士は、上下に近接し、溝９８ａに対向している。同様に、直線部９１ｃ，９１ｄ同士は、溝９８ｂに対向している。すなわち、１対の直線部９１ａ，９１ｂが、溝９８ａ内に入り込んでおり、他の１対の直線部９１ｃ，９１ｄが、溝９８ｂ内に入り込んでいる。 As shown in FIG. 14, the heating conductor 90 includes linear portions 91 a to 91 d that are close to and opposed to the grooves 98 a and 98 b of the article to be heated 100. The straight portions 91a and 91b are close to each other in the vertical direction and face the groove 98a. Similarly, the straight portions 91c and 91d face the groove 98b. That is, the pair of straight portions 91a and 91b enters the groove 98a, and the other pair of straight portions 91c and 91d enters the groove 98b.

被加熱物１００は、搬送装置９２によって、図１２において矢印Ｆで示す方向に搬送され、焼入れ対象部位９９ａ，９９ｂが、加熱導体９０（直線部９１ａ〜９１ｄ）を通過する際に順次誘導加熱され、冷却装置９４を通過する際に冷却液が噴射供給されて順次冷却される。
高周波焼入装置１０１では、加熱導体（直線部９１ａ〜９１ｄ）から加熱導体と順次対向する被加熱物１００の焼入れ対象部位９９ａ，９９ｂまでの距離が略一定となるように、被加熱物１００を移動させている。すなわち、誘導加熱を実施しないで被加熱物１００を移動させると、加熱導体（直線部９１ａ〜９１ｄ）から被加熱物１００の焼入れ対象部位９９ａ，９９ｂまでの距離は、図１４に示す状態で、略一定に保たれている。 The object to be heated 100 is conveyed by the conveying device 92 in the direction indicated by the arrow F in FIG. 12, and the portions to be quenched 99a and 99b are sequentially induction-heated when passing through the heating conductor 90 (linear portions 91a to 91d). When passing through the cooling device 94, the cooling liquid is jetted and sequentially cooled.
In the induction hardening apparatus 101, the object 100 to be heated is set so that the distance from the heating conductor (the straight portions 91a to 91d) to the quenching target portions 99a and 99b of the object 100 to be sequentially opposed to the heating conductor is substantially constant. It is moved. That is, when the object to be heated 100 is moved without performing induction heating, the distance from the heating conductor (straight portions 91a to 91d) to the quenching target portions 99a and 99b of the object to be heated 100 is as shown in FIG. It is kept almost constant.

ところが、被加熱物１００を移動焼入れした結果、本件出願人は、被加熱物１００が上下方向に歪み、反り返る現象を確認した。被加熱物１００が歪むと、焼入れ対象部位９９ａ，９９ｂから加熱導体９０の直線部９１ａ〜９１ｄまでの距離が変動し、焼入れ対象部位９９ａ，９９ｂを一様に誘導加熱するのが困難になる。 However, as a result of moving and quenching the object to be heated 100, the present applicant confirmed a phenomenon in which the object to be heated 100 is warped and warped in the vertical direction. When the object to be heated 100 is distorted, the distance from the quenching target portions 99a and 99b to the straight portions 91a to 91d of the heating conductor 90 varies, and it is difficult to uniformly inductively heat the quenching target portions 99a and 99b.

そこで本件出願人は、図１５に示すように、加熱導体９０の前後であって、且つ、被加熱物１００の上下に、矯正部材９３ａ〜９３ｄを配置した。矯正部材９３ａ〜９３ｄは、加熱導体９０の前後（図１２，図１３の矢印Ｆの上流側と下流側）に配置されている。矯正部材９３ａ，９３ｃは、加熱導体９０よりも矢印Ｆで示す搬送方向の上流側に配置されており、矯正部材９３ｂ，９３ｄは、下流側に配置されている。よって、仮に被加熱物１００が上下方向に歪んでも、被加熱物１００は、いずれかの矯正部材９３ａ〜９３ｄに当接し、溝９８ａ，９８ｂと直線部９１ａ〜９１ｄの間隔は、誘導加熱に支障を来さない程度に保つことができるようになった。 Therefore, as shown in FIG. 15, the present applicant has arranged correction members 93 a to 93 d before and after the heating conductor 90 and above and below the heated object 100. The correction members 93a to 93d are disposed before and after the heating conductor 90 (upstream and downstream of the arrow F in FIGS. 12 and 13). The correction members 93a and 93c are disposed upstream of the heating conductor 90 in the transport direction indicated by the arrow F, and the correction members 93b and 93d are disposed on the downstream side. Therefore, even if the article to be heated 100 is distorted in the vertical direction, the article to be heated 100 abuts on any of the correction members 93a to 93d, and the interval between the grooves 98a and 98b and the straight portions 91a to 91d hinders induction heating. Can be kept to the extent that does not come.

しかし、被加熱物１００の、矢印Ｆ方向の搬送が進むと、図１５に示すように、やがて被加熱物１００の後端部９５が、矯正部材９３ａ，９３ｃを通過し、矯正部材９３ａ，９３ｃから外れる。図１５では、被加熱物１００が矯正部材９３ｂに当接し、被加熱物１００の後端部９５が、上方へ反り返っている。そのため、後端部９５では、溝９８ａ〜９８ｄと、加熱導体９０（直線部９１ａ〜９１ｄ）との距離が変化し、当該部位の焼入れが不良になる可能性がある。図１６では、被加熱物１００の後端部９５（図１５）が、上方へ反り返ったために、直線部９１ｂ，９１ｄが、各々溝９８ａ，９８ｂに接触するという極端な状態を示している。 However, when conveyance of the object to be heated 100 in the direction of arrow F proceeds, as shown in FIG. 15, the rear end portion 95 of the object to be heated 100 eventually passes through the correction members 93a and 93c, and the correction members 93a and 93c. Deviate from. In FIG. 15, the object to be heated 100 abuts against the correction member 93 b, and the rear end portion 95 of the object to be heated 100 warps upward. Therefore, in the rear end portion 95, the distance between the grooves 98a to 98d and the heating conductor 90 (the straight portions 91a to 91d) may change, and the quenching of the part may be poor. FIG. 16 shows an extreme state where the rear end portion 95 (FIG. 15) of the article to be heated 100 warps upward and the straight portions 91b and 91d are in contact with the grooves 98a and 98b, respectively.

そこで従来は、このような事態が生じた場合に備え、被加熱物１００の長さを、製品長さよりも若干長くしておき、被加熱物を移動焼入れした後に、焼入れが不良となった末端部分を切断し、製品全体の焼入れ品質を一定に保つ等の処置が必要であった。
そのため、従来は、製品よりも長い被加熱物１００が必要であり、さらに、焼入れ完了後に、被加熱物１００の末端部分を切断するという作業が必要であった。 Therefore, conventionally, in case such a situation occurs, the length of the object to be heated 100 is slightly longer than the product length, and after the object to be heated is moved and quenched, the end of which the quenching is poor It was necessary to take measures such as cutting the part and keeping the quenching quality of the entire product constant.
Therefore, conventionally, the object to be heated 100 longer than the product is required, and further, the work of cutting the end portion of the object to be heated 100 after the completion of quenching is necessary.

そこで本発明は、上記事情に鑑み、長尺状の被加熱物の末端部分まで一様に移動焼入れすることができる高周波焼入装置を提供することを目的としている。 In view of the above circumstances, an object of the present invention is to provide an induction hardening apparatus capable of moving and quenching uniformly to the end portion of a long object to be heated.

上記課題を解決するための請求項１に記載の発明は、
長尺状の被加熱物の表面に形成された、長手方向にのびる溝を高周波焼入れする高周波焼入装置であって、前記高周波焼入装置は、前記溝を誘導加熱するための加熱導体を有する誘導加熱装置と、誘導加熱された溝を急冷する冷却装置とを有し、前記加熱導体は、被加熱物の長手方向にのびる対向部を有しており、前記対向部は、被加熱物の溝内に収容されて被加熱物の溝の長手方向の一部に対向し、高周波焼入装置は、前記誘導加熱装置及び冷却装置に対して、被加熱物を長手方向に相対移動させながら、前記溝を順に高周波焼入れするものであり、加熱導体における被加熱物の相対移動方向の上流側と、下流側と、被加熱物の加熱中の部位を含む横断面内に、各々矯正部材が配置されており、前記各矯正部材は、誘導加熱された被加熱物が歪む方向の表面から、所定間隔をおいて配置されて、被加熱物の歪み量を規制するものであり、被加熱物が歪んで前記矯正部材に当接して、前記矯正部材は被加熱物がそれ以上歪むことを規制することを特徴とする高周波焼入装置である。
すなわち、長尺状の被加熱物の表面に形成された、長手方向にのびる溝を高周波焼入れする高周波焼入装置であって、前記高周波焼入装置は、前記溝を誘導加熱するための加熱導体を有する誘導加熱装置と、誘導加熱された溝を急冷する冷却装置とを有し、前記加熱導体は、被加熱物の溝内に全部又は一部が収容されて、被加熱物の溝の長手方向の一部に対向し、高周波焼入装置は、前記誘導加熱装置及び冷却装置に対して、被加熱物を長手方向に相対移動させながら、前記溝を順に高周波焼入れするものであり、加熱導体における被加熱物の相対移動方向の上流側と、下流側と、被加熱物の加熱中の部位を含む横断面内に、各々矯正部材が配置されており、前記各矯正部材は、誘導加熱された被加熱物が歪む方向の表面から、所定間隔をおいて配置されて、被加熱物の歪み量を規制するものであり、被加熱物が歪んで前記矯正部材に当接すると、前記溝から加熱導体までの距離が、焼入れ深さが所定深さ以下となる距離に規制されることを特徴とする高周波焼入装置である。 The invention according to claim 1 for solving the above-mentioned problem is as follows.
An induction hardening apparatus for induction hardening a groove extending in a longitudinal direction formed on a surface of a long object to be heated, the induction hardening apparatus having a heating conductor for induction heating the groove An induction heating device and a cooling device for rapidly cooling the induction-heated groove, and the heating conductor has a facing portion extending in a longitudinal direction of the object to be heated, and the facing portion is formed of the object to be heated. is accommodated in the groove is opposed to a part of the longitudinal grooves of the object to be heated, induction hardening apparatus for the inductive heating device and cooling device, while relatively moving the object to be heated in a longitudinal direction, The grooves are induction-quenched in order, and correction members are arranged in the cross section including the upstream side, the downstream side, and the heated part of the heated object in the relative movement direction of the heated object in the heating conductor. Each of the correction members is heated by induction heating The distorted direction of the surface, are arranged at a predetermined interval, which regulates the amount of strain of the object to be heated, and contact with the straightening member is distorted object to be heated, wherein the straightening member is heated object There is a induction hardening apparatus characterized that you restrict being distorted more.
That is, an induction hardening apparatus for induction-quenching a groove extending in the longitudinal direction formed on the surface of a long object to be heated, the induction hardening apparatus being a heating conductor for inductively heating the groove And a cooling device that rapidly cools the induction-heated groove, and the heating conductor is housed in the groove of the object to be heated in whole or in part, and the length of the groove of the object to be heated is Opposing to a part of the direction, the induction hardening device is for induction hardening the groove in order while moving the object to be heated relative to the induction heating device and the cooling device in the longitudinal direction, and the heating conductor Correction members are arranged in the cross section including the upstream side, the downstream side, and the heated part of the heated object in the relative movement direction of the heated object, and each of the correcting members is induction-heated. From the surface in the direction in which the heated object is distorted. Arranged to regulate the amount of distortion of the object to be heated, and when the object to be heated is distorted and abuts against the correction member, the distance from the groove to the heating conductor is such that the quenching depth is a predetermined depth or less. The induction hardening apparatus is characterized in that it is restricted to a distance of

請求項１に記載の発明では、各矯正部材が、誘導加熱された被加熱物が歪む方向の表面から、所定間隔をおいて配置されているので、被加熱物が歪み、いずれかの矯正部材に当接すると、被加熱物は、当接した矯正部材によって歪み量が規制される。そして、溝から加熱導体までの距離が、焼入れ深さが所定深さ以下となる距離に規制される。そのため、長手方向にのびる溝の焼入れ深さは、略均一化される。
特に、被加熱物の加熱中の部位を含む横断面内に、矯正部材を配置したことにより、被加熱物の移動方向の末端部分が当該矯正部材に当接することによって、被加熱物の溝は、全長に渡って、略均一に焼入れされる。 In the invention according to claim 1, since each of the correction members is disposed at a predetermined interval from the surface in the direction in which the induction-heated object to be heated is distorted, the object to be heated is distorted, and any of the correction members When abutting on the object, the amount of distortion of the heated object is regulated by the abutting correction member. And the distance from a groove | channel to a heating conductor is controlled by the distance from which a quenching depth becomes below predetermined depth. Therefore, the quenching depth of the groove extending in the longitudinal direction is made substantially uniform.
In particular, by arranging the correction member in the cross section including the part being heated of the heated object, the end portion in the moving direction of the heated object comes into contact with the correction member, so that the groove of the heated object is It is hardened substantially uniformly over the entire length.

請求項２に記載の発明は、被加熱物における溝が形成されている表面は、側面であり、被加熱物の下面であって、且つ、被加熱物の加熱中の部位を含む横断面内に、冷却液を噴射する冷却液供給装置をさらに設けたことを特徴とする請求項１に記載の高周波焼入装置である。 According to the second aspect of the present invention, the surface of the object to be heated on which the groove is formed is a side surface, the lower surface of the object to be heated, and the cross section including the portion being heated of the object to be heated. The induction hardening apparatus according to claim 1, further comprising a cooling liquid supply device for injecting the cooling liquid.

請求項２に記載の発明では、焼入れのための冷却装置とは別に設けた冷却液供給装置によって、被加熱物の下面であって、且つ、被加熱物の加熱中の部位を含む横断面内の部位に、冷却液を噴射する。すなわち、同一横断面内における側面が誘導加熱されているときに、下面が冷却される。これによって、誘導加熱中の被加熱物の歪みを低減することができる。 In the second aspect of the present invention, the cooling liquid supply device provided separately from the cooling device for quenching includes a lower surface of the object to be heated and a cross section including a portion during heating of the object to be heated. The coolant is sprayed on the part. That is, when the side surface in the same cross section is induction-heated, the lower surface is cooled. Thereby, distortion of the object to be heated during induction heating can be reduced.

請求項３に記載の発明は、前記冷却液供給装置の一部が矯正部を構成しており、前記矯正部は、被加熱物の下面から、所定間隔をおいて配置されており、前記矯正部は、被加熱物の歪み量を規制し、被加熱物が歪んで前記矯正部に当接すると、前記溝から加熱導体までの距離が、焼入れ深さが所定深さ以下となる距離に規制されることを特徴とする請求項２に記載の高周波焼入装置である。 According to a third aspect of the present invention, a part of the coolant supply device constitutes a correction part, and the correction part is arranged at a predetermined interval from the lower surface of the object to be heated. The portion regulates the amount of distortion of the object to be heated, and when the object to be heated is distorted and comes into contact with the correction part, the distance from the groove to the heating conductor is restricted to a distance at which the quenching depth is a predetermined depth or less. The induction hardening apparatus according to claim 2, wherein the induction hardening apparatus is provided.

請求項３に記載の発明では、被加熱物が下方へ歪み、冷却液供給装置の矯正部に、被加熱物が当接すると、被加熱物のそれ以上の歪みが抑制される。すなわち、被加熱物が加熱導体に対して相対移動し、被加熱物の末端部分が、被加熱物の移動方向の最も上流側に配置された矯正部材を通過すると、被加熱物は当該矯正部材によって矯正できなくなる。しかしこのとき、被加熱物は、冷却液供給装置の矯正部に当接し、歪み量が規制される。そして、溝は、全長に渡って、略一様に焼入れされる。 In the invention according to the third aspect, when the object to be heated is distorted downward and the object to be heated comes into contact with the correction portion of the coolant supply device, further distortion of the object to be heated is suppressed. That is, when the object to be heated moves relative to the heating conductor, and the end portion of the object to be heated passes through the correction member arranged on the most upstream side in the moving direction of the object to be heated, the object to be heated becomes the correction member. It becomes impossible to correct by. However, at this time, the object to be heated comes into contact with the correction portion of the coolant supply device, and the amount of distortion is regulated. And a groove | channel is quenched substantially uniformly over the full length.

本発明では、加熱導体の全部又は一部が、長尺状の被加熱物の溝に収容されて対向しており、加熱導体を含む横断面内であって、誘導加熱された被加熱物が歪む方向の表面から所定間隔をおいて矯正部材を配置した。そして、被加熱物が歪み、被加熱物が矯正部材に当接すると、被加熱物の歪み量が規制される。よって、被加熱物の溝を、全長に渡って一様に焼入れすることができる。 In the present invention, all or a part of the heating conductor is accommodated in the elongated groove of the object to be heated and is in the transverse section including the heating conductor, and the object to be heated that is induction-heated is The correction member was disposed at a predetermined interval from the surface in the distorting direction. When the object to be heated is distorted and the object to be heated contacts the correction member, the amount of distortion of the object to be heated is regulated. Therefore, the groove of the object to be heated can be uniformly quenched over the entire length.

本発明の一実施形態に係る高周波焼入装置に、被加熱物をセッティングした状態を示す斜視図である。It is a perspective view which shows the state which set the to-be-heated material to the induction hardening apparatus which concerns on one Embodiment of this invention. 誘導加熱装置の配線系統図である。It is a wiring system figure of an induction heating device. 図１の高周波焼入装置の、加熱導体の斜視図である。It is a perspective view of a heating conductor of the induction hardening apparatus of FIG. 図１の高周波焼入装置の支持部材の分解斜視図である。It is a disassembled perspective view of the supporting member of the induction hardening apparatus of FIG. 図４の支持部材の組立斜視図である。FIG. 5 is an assembled perspective view of the support member of FIG. 4. 図３の加熱導体を使用して、被加熱物を誘導加熱する際の、要部側面図である。It is a principal part side view at the time of inductively heating a to-be-heated material using the heating conductor of FIG. 図６のＡ−Ａ断面図である。It is AA sectional drawing of FIG. 図６において、被加熱物の末端が、被加熱物の移動方向の上流側の矯正部材から外れ、被加熱物が冷却液供給装置の矯正部に当接している状態を示す側面図である。6 is a side view showing a state in which the end of the object to be heated is detached from the correction member on the upstream side in the moving direction of the object to be heated, and the object to be heated is in contact with the correction unit of the coolant supply device. 図８のＢ−Ｂ断面図である。It is BB sectional drawing of FIG. 図６において、被加熱物の末端が、被加熱物の移動方向の上流側の矯正部材から外れ、被加熱物が矯正部材に当接している状態を示す側面図である。6 is a side view showing a state in which the end of the object to be heated is detached from the correction member on the upstream side in the moving direction of the object to be heated, and the object to be heated is in contact with the correction member. 図１０のＣ−Ｃ断面図である。It is CC sectional drawing of FIG. 従来の高周波焼入装置に、被加熱物をセッティングした状態を示す斜視図である。It is a perspective view which shows the state which set the to-be-heated object to the conventional induction hardening apparatus. 図１２の高周波焼入装置の加熱導体と、被加熱物の側面図である。It is a side view of the to-be-heated material and the heating conductor of the induction hardening apparatus of FIG. 図１３のＤ−Ｄ断面図である。It is DD sectional drawing of FIG. 図１３において、被加熱物の後端部が、被加熱物の移動方向の上流側の矯正部材から外れ、被加熱物が加熱導体と接触している状態を示す側面図である。FIG. 14 is a side view showing a state in which the rear end portion of the heated object is detached from the correction member on the upstream side in the moving direction of the heated object, and the heated object is in contact with the heating conductor. 図１５のＥ−Ｅ断面図である。It is EE sectional drawing of FIG.

高周波焼入装置１で焼入れする被加熱物１００は、側面１００ａ，１００ｂに溝９８ａ，９８ｂが形成されている。この溝９８ａ，９８ｂの溝底とその周辺の部位が、焼入れ対象部位９９ａ，９９ｂである。焼入れ対象部位９９ａ，９９ｂは、被加熱物１００の長手方向に沿ってのびている。 As for the to-be-heated material 100 quenched with the induction hardening apparatus 1, groove | channels 98a and 98b are formed in side surface 100a, 100b. The groove bottoms of the grooves 98a and 98b and the surrounding parts are the parts to be quenched 99a and 99b. The quenching target portions 99 a and 99 b extend along the longitudinal direction of the article to be heated 100.

図１に示すように、高周波焼入装置１は、誘導加熱装置２、冷却装置９ａ，９ｂ、支持機構１０、搬送装置１１を有する。以下、各構成について順に説明する。 As shown in FIG. 1, the induction hardening apparatus 1 includes an induction heating device 2, cooling devices 9 a and 9 b, a support mechanism 10, and a transport device 11. Hereafter, each structure is demonstrated in order.

誘導加熱装置２は、図２に示すように、高周波電源８、トランス５、リード４ａ、４ｂ、及び加熱導体３を有する。 As shown in FIG. 2, the induction heating device 2 includes a high frequency power supply 8, a transformer 5, leads 4 a and 4 b, and a heating conductor 3.

高周波電源８は、交流電源７と高周波発信器６とを有する。すなわち、交流電源７から供給される交流の周波数が、高周波発信器で高周波化される。 The high frequency power source 8 includes an AC power source 7 and a high frequency transmitter 6. That is, the frequency of the alternating current supplied from the alternating current power supply 7 is increased by the high frequency transmitter.

トランス５は、一次側５ａと二次側５ｂとを有する。一次側５ａは、高周波電源８と接続されている。よって、トランス５の一次側５ａには高周波電流が入力される。トランス５の二次側には、図示しない入出力端子を介してリード４ａ，４ｂが接続されている。リード４ａ，４ｂは、良導体からなる中空の導線（例えば銅管）である。リード４ａ，４ｂ内部には冷却液が循環供給可能である。 The transformer 5 has a primary side 5a and a secondary side 5b. The primary side 5 a is connected to the high frequency power supply 8. Therefore, a high-frequency current is input to the primary side 5a of the transformer 5. Leads 4a and 4b are connected to the secondary side of the transformer 5 via input / output terminals (not shown). The leads 4a and 4b are hollow conductive wires (for example, copper tubes) made of a good conductor. A coolant can be circulated and supplied into the leads 4a and 4b.

加熱導体３は、良導体からなる中空の導線（例えば銅管）からなる部材である。加熱導体３は、各部を屈曲，湾曲、又は導線同士をろう付けすることによって、図３に示す形状に構成される。図３に示すように、加熱導体３は、入出力部３ａ，３ｂと、直線部２３ａ，２３ｂ（対向部２４ａ）と、直線部２３ｃ，２３ｄ（対向部２４ｂ）と、迂回部２９〜３３、及び接続部３４〜４１を有する。 The heating conductor 3 is a member made of a hollow conductive wire (for example, a copper tube) made of a good conductor. The heating conductor 3 is formed into a shape shown in FIG. 3 by bending, bending, or brazing the conductors of each part. As shown in FIG. 3, the heating conductor 3 includes input / output parts 3 a and 3 b, straight parts 23 a and 23 b (opposing part 24 a), linear parts 23 c and 23 d (opposing part 24 b), detour parts 29 to 33, And connection portions 34 to 41.

入出力部３ａ，３ｂの横断面形状と迂回部２９〜３３の横断面形状は同じである。また、接続部３４〜４１の横断面形状と直線部２３ａ〜２３ｄの横断面形状は同じであるが、当該横断面の大きさは入出力部３ａ，３ｂの横断面の大きさの半分程度である。具体的には、入出力部３ａ，３ｂの横断面と迂回部２９〜３３の横断面は正方形形状であり、接続部３４〜４１の横断面と直線部２３ａ〜２３ｄの横断面は正方形を二分した様な長方形形状である。 The cross-sectional shape of the input / output units 3a and 3b is the same as the cross-sectional shape of the detour units 29 to 33. Moreover, although the cross-sectional shape of the connection parts 34-41 and the cross-sectional shape of the linear parts 23a-23d are the same, the magnitude | size of the said cross-section is about half the size of the cross-section of the input-output parts 3a and 3b. is there. Specifically, the cross section of the input / output parts 3a and 3b and the cross section of the bypass parts 29 to 33 are square, and the cross section of the connection parts 34 to 41 and the cross section of the straight parts 23a to 23d are divided into squares. It has a rectangular shape.

直線部２３ａ〜２３ｄは、直線状の中空の導線である。各直線部２３ａ〜２３ｄは、同じ長さを有する。直線部２３ａと直線部２３ｂは近接し、且つ、平行に配置されて対向部２４ａを構成している。すなわち、対向部２４ａは２つの直線部２３ａ，２３ｂから成る。同様に、直線部２３ｃと直線部２３ｄは近接し、且つ、平行に配置されて対向部２４ｂを構成している。すなわち、対向部２４ｂは２つの直線部２３ｃ，２３ｄから成る。 The straight portions 23a to 23d are straight hollow conductive wires. Each linear part 23a-23d has the same length. The straight line portion 23a and the straight line portion 23b are close to each other and arranged in parallel to constitute the facing portion 24a. That is, the facing portion 24a is composed of two straight portions 23a and 23b. Similarly, the straight line portion 23c and the straight line portion 23d are close to each other and arranged in parallel to constitute the facing portion 24b. That is, the facing portion 24b is composed of two straight portions 23c and 23d.

迂回部２９は、張出部２９ａと退避部２９ｂを有する。張出部２９ａと退避部２９ｂは共に直線状であり、両者は直交して連続している。 The detour part 29 has an overhang part 29a and a retracting part 29b. Both the overhanging portion 29a and the retracting portion 29b are linear, and both are orthogonally continuous.

迂回部３０は、迂回部２９と同様の、直交する張出部３０ａと退避部３０ｂを有する。 The detour unit 30 includes an overhang portion 30 a and a retracting unit 30 b that are orthogonal to each other, similar to the detour unit 29.

迂回部３１は、直線状の退避部３１ａ，張出部３１ｂ，渡し部３１ｃ，退避部３１ｄを有する。退避部３１ａと張出部３１ｂは直交して連続している。張出部３１ｂの長さは、接続部３４の幅と同程度か、又は若干大きい。また、張出部３１ｂには、渡し部３１ｃの一端が連続している。渡し部３１ｃは、退避部３１ａと張出部３１ｂのいずれにも直交している。渡し部３１ｃの他端は、退避部３１ｄと連続している。退避部３１ｄは、渡し部３１ｃ及び張出部３１ｂとは直交し、退避部３１ａと平行である。また、退避部３１ａと退避部３１ｄは、直交して連続する張出部３１ｂと渡し部３１ｃを含む平面に対して同じ側に配置されている。 The detour part 31 includes a linear retracting part 31a, an overhang part 31b, a transfer part 31c, and a retracting part 31d. The evacuation part 31a and the overhang part 31b are orthogonally continuous. The length of the overhanging portion 31 b is approximately the same as or slightly larger than the width of the connecting portion 34. In addition, one end of the transfer portion 31c is continuous with the overhang portion 31b. The transfer part 31c is orthogonal to both the retracting part 31a and the overhanging part 31b. The other end of the transfer part 31c is continuous with the retracting part 31d. The retracting part 31d is orthogonal to the transfer part 31c and the overhanging part 31b and is parallel to the retracting part 31a. Further, the retracting portion 31a and the retracting portion 31d are disposed on the same side with respect to a plane including the overhanging portion 31b and the passing portion 31c that are orthogonally continuous.

迂回部３２は、直線状の退避部３２ａ，渡し部３２ｂ，退避部３２ｃを有する。渡し部３２ｂの両端に、各々退避部３２ａと退避部３２ｃが連続している。退避部３２ａと退避部３２ｃは平行であり、両者は渡し部３２ｂと直交している。また、退避部３２ａと退避部３２ｃは、渡し部３２ｂに対して同じ側に配置されている。 The detour unit 32 includes a linear retraction unit 32a, a transfer unit 32b, and a retraction unit 32c. A retreating part 32a and a retreating part 32c are connected to both ends of the transfer part 32b. The evacuation part 32a and the evacuation part 32c are parallel, and both are orthogonal to the transfer part 32b. Further, the retracting part 32a and the retracting part 32c are arranged on the same side with respect to the transfer part 32b.

迂回部３３は、迂回部３２と同様の構成を有する。すなわち、迂回部３３は、直線状の退避部３３ａ，渡し部３３ｂ，退避部３３ｃを有する。渡し部３３ｂの両端に各々退避部３３ａと退避部３３ｃが連続し、退避部３３ａと退避部３３ｃは平行である。また、退避部３３ａと退避部３３ｃは、渡し部３３ｂと直交している。 The bypass unit 33 has the same configuration as the bypass unit 32. That is, the detour unit 33 includes a linear retraction unit 33a, a transfer unit 33b, and a retraction unit 33c. The retracting portion 33a and the retracting portion 33c are respectively connected to both ends of the transfer portion 33b, and the retracting portion 33a and the retracting portion 33c are parallel to each other. Further, the retracting portion 33a and the retracting portion 33c are orthogonal to the transfer portion 33b.

各接続部３４〜４１は直線状の中空の導線である。 Each connection part 34-41 is a linear hollow conducting wire.

そして、以下に説明するように、入出力部３ａ，３ｂ、直線部２３ａ，２３ｂ、直線部２３ｃ，２３ｄ、迂回部２９〜３３、及び接続部３４〜４１が連続して、加熱導体３が構成されている。 As described below, the input / output units 3a and 3b, the linear units 23a and 23b, the linear units 23c and 23d, the detour units 29 to 33, and the connection units 34 to 41 are connected to form the heating conductor 3. Has been.

そして図２に示すように、入出力部３ａ，３ｂの一端は、図示しない入出力端子を介して、各々リード４ａ，４ｂと接続されている。 As shown in FIG. 2, one ends of the input / output units 3a and 3b are connected to leads 4a and 4b via input / output terminals (not shown).

迂回部２９の張出部２９ａ側の端部は、入出力部３ａの他端に接続されている。そして迂回部２９の退避部２９ｂ側の端部には、接続部３４の一端が接続されている。接続部３４は扁平な直線状の導線である。接続部３４は、迂回部２９の張出部２９ａと平行であり、退避部２９ｂに対して張出部２９ａと同じ側に配置されている。 The end portion of the bypass portion 29 on the overhang portion 29a side is connected to the other end of the input / output portion 3a. One end of the connecting portion 34 is connected to the end portion of the bypass portion 29 on the side of the retracting portion 29b. The connection part 34 is a flat linear conducting wire. The connecting portion 34 is parallel to the overhang portion 29a of the detour portion 29, and is disposed on the same side as the overhang portion 29a with respect to the retracting portion 29b.

接続部３４の他端には、直線部２３ｂの一端が接続されている。すなわち、迂回部２９と直線部２３ｂは、接続部３４を介して接続されている。直線部２３ｂは、迂回部２９の張出部２９ａと退避部２９ｂのいずれに対しても直交している。直線部２３ｂの他端には接続部３５の一端が接続されている。接続部３５と接続部３４は平行であり、両者は対向している。 One end of the straight line portion 23 b is connected to the other end of the connection portion 34. That is, the detour part 29 and the straight line part 23 b are connected via the connection part 34. The straight line portion 23b is orthogonal to both the protruding portion 29a and the retracting portion 29b of the detour portion 29. One end of the connecting portion 35 is connected to the other end of the linear portion 23b. The connection part 35 and the connection part 34 are parallel, and both face each other.

接続部３５の他端には迂回部３３の退避部３３ａ側の端部が接続されている。すなわち、直線部２３ｂと迂回部３３は、接続部３５を介して接続されている。また、迂回部３３の退避部３３ｃ側の端部には接続部３６の一端が接続されている。接続部３６は、渡し部３３ｂと平行である。また、接続部３６は接続部３５と同一直線状に配置されている。 The other end of the connecting portion 35 is connected to the end portion of the bypass portion 33 on the retracting portion 33a side. That is, the straight line part 23 b and the bypass part 33 are connected via the connection part 35. In addition, one end of the connecting portion 36 is connected to the end portion of the bypass portion 33 on the side of the retracting portion 33c. The connection part 36 is parallel to the transfer part 33b. Further, the connecting portion 36 is arranged in the same straight line as the connecting portion 35.

接続部３６の他端には、対向部２４ｂの直線部２３ｄの一端が連続している。すなわち、迂回部３３は接続部３６を介して直線部２３ｄと接続されている。直線部２３ｄは、直線部２３ｂと平行であり、直線部２３ｂと距離Ｓを隔てて配置されている。直線部２３ｄの他端には、接続部３７を介して迂回部３１の退避部３１ｄが接続されている。 One end of the straight line portion 23d of the facing portion 24b is continuous with the other end of the connecting portion 36. That is, the detour part 33 is connected to the straight line part 23 d via the connection part 36. The straight line portion 23d is parallel to the straight line portion 23b, and is arranged at a distance S from the straight line portion 23b. The retraction part 31d of the detour part 31 is connected to the other end of the straight line part 23d via the connection part 37.

迂回部３１の退避部３１ａは、接続部３８を介して直線部２３ａの一端と接続されている。ここで接続部３８は、一辺３８ａと他辺３８ｂを有し、両辺は直交している。接続部３８の一辺３８ａは迂回部３１の張出部３１ｂと平行に対向配置され、他辺３８ｂは接続部３４と平行に対向配置されている。その結果、直線部２３ａの一端は、直線部２３ｂの一端と近接対向する位置に配置されている。そして直線部２３ａと直線部２３ｂとで対向部２４ａが構成される。 The retracting portion 31 a of the detour portion 31 is connected to one end of the straight portion 23 a through the connecting portion 38. Here, the connecting portion 38 has one side 38a and the other side 38b, and both sides are orthogonal to each other. One side 38 a of the connection part 38 is arranged to face the overhang part 31 b of the detour part 31 in parallel and the other side 38 b is arranged to face the connection part 34 in parallel. As a result, one end of the straight line portion 23a is disposed at a position close to and opposite to one end of the straight line portion 23b. And the opposing part 24a is comprised by the linear part 23a and the linear part 23b.

直線部２３ａは、直線部２３ｂと同じ長さである。また、直線部２３ａは直線部２３ｂに近接して対向配置されている。さらに直線部２３ａの他端は、接続部３９を介して迂回部３２の退避部３２ａと接続されている。接続部３９は、接続部３５と同方向にのびている。 The straight line portion 23a has the same length as the straight line portion 23b. Further, the straight line portion 23a is disposed to face the straight line portion 23b in close proximity. Furthermore, the other end of the straight line portion 23 a is connected to the retracting portion 32 a of the detour portion 32 via the connecting portion 39. The connection part 39 extends in the same direction as the connection part 35.

迂回部３２の退避部３２ｃは、接続部４０を介して直線部２３ｃの一端と接続されている。直線部２３ｃと直線部２３ｄは同じ長さである。また、直線部２３ｃは直線部２３ｄと近接し、対向している。直線部２３ｃの他端は、接続部４１を介して迂回部３０の退避部３０ｂと接続されている。接続部４１は、接続部３７と同じ方向にのびている。 The retracting portion 32 c of the detour portion 32 is connected to one end of the linear portion 23 c through the connection portion 40. The straight portion 23c and the straight portion 23d have the same length. The straight line portion 23c is close to and faces the straight line portion 23d. The other end of the straight line portion 23 c is connected to the retracting portion 30 b of the detour portion 30 via the connection portion 41. The connection part 41 extends in the same direction as the connection part 37.

ここで、退避部３０ｂは迂回部２９の退避部２９ｂと離間して対向している。また、退避部３０ｂは、退避部２９ｂよりも若干短い。そして迂回部３０の退避部３０ｂは、接続部４１を介して、対向部２４ｂの直線部２３ｃ（図３で見て上側の直線部）に接続されており、迂回部２９の退避部２９ｂは、接続部３４を介して、直線部２３ｂ（図３で見て下側の直線部）に接続されている。 Here, the retracting portion 30b is spaced apart from the retracting portion 29b of the detour portion 29 and faces the retracting portion 29b. Further, the retracting portion 30b is slightly shorter than the retracting portion 29b. The retreating part 30b of the detouring part 30 is connected to the straight line part 23c (the upper straight line part in FIG. 3) of the facing part 24b via the connection part 41, and the retreating part 29b of the detouring part 29 is It is connected to the straight line portion 23b (lower straight line portion in FIG. 3) via the connection portion.

加熱導体３では、迂回部２９、３０、３１によって環４２が構成され、迂回部３２、３３によって環４３が構成される。各接続部３４、３８、３７、４１は環４２の内側に向かってのび、各接続部３５、３９、３６、４０は環４３の内側に向かってのびる。その結果、各直線部２３ａ〜２３ｄの両端は、環４２及び環４３の内側に配置される。また、各直線部２３ａ〜２３ｄは、環４２と環４３の間に配置される。 In the heating conductor 3, the bypass portion 29, 30, 31 forms a ring 42, and the bypass portion 32, 33 forms a ring 43. Each connecting portion 34, 38, 37, 41 extends toward the inside of the ring 42, and each connecting portion 35, 39, 36, 40 extends toward the inside of the ring 43. As a result, both ends of each straight line portion 23 a to 23 d are arranged inside the ring 42 and the ring 43. In addition, each of the straight portions 23 a to 23 d is disposed between the ring 42 and the ring 43.

図１に示すように、冷却装置９ａ、９ｂは、多数のノズル４５を有する。冷却装置９ａ、９ｂは、図示しない冷却配管を介して冷却液供給源と接続されている。そしてノズル４５から、加圧された冷却液を噴射することができる。冷却装置９ａ、９ｂは、被加熱物１００を挟んで配置される。 As shown in FIG. 1, the cooling devices 9 a and 9 b have a large number of nozzles 45. The cooling devices 9a and 9b are connected to a coolant supply source via a cooling pipe (not shown). Then, pressurized coolant can be ejected from the nozzle 45. The cooling devices 9a and 9b are arranged with the object to be heated 100 interposed therebetween.

支持機構１０は、複数の支持ユニット１４を有する。各支持ユニット１４は、各々支持部材１２と押圧部材１３とを有する。 The support mechanism 10 includes a plurality of support units 14. Each support unit 14 includes a support member 12 and a pressing member 13.

支持部材１２は、下部回転体１５で構成されている。図４，図５に示すように、下部回転体１５は、軸２０，分割片５０，５１，介在部材１９等を有する。 The support member 12 includes a lower rotating body 15. As shown in FIGS. 4 and 5, the lower rotating body 15 includes a shaft 20, divided pieces 50 and 51, an interposed member 19, and the like.

軸２０は、中央部分の装着部２０ｃと、両端部分のねじ部２０ａ，２０ｂとを有する。
介在部材１９は、孔１９ａを有する環状の部材である。 The axis | shaft 20 has the mounting part 20c of a center part, and the screw parts 20a and 20b of both ends.
The interposition member 19 is an annular member having a hole 19a.

分割片５０は、大径部１６ａと小径部１７ａとが同芯状に連続した構造を呈する。そして、分割片５０の中心には孔５２ａが設けられている。すなわち孔５２ａは、大径部１６ａ側から小径部１７ａ側へ貫通している。さらに大径部１６ａと小径部１７ａの間には段部１８ａが形成される。分割片５１は、分割片５０と同じ構造を有する。すなわち、分割片５１は、大径部１６ｂ，小径部１７ｂ，段部１８ｂを有し、中心には孔５２ｂが設けられている。分割片５０の孔５２ａ（分割片５１の孔５２ｂ）の内径は、軸２０の装着部２０ｃを挿通可能な大きさを有する。 The split piece 50 has a structure in which the large-diameter portion 16a and the small-diameter portion 17a are concentric. A hole 52 a is provided at the center of the split piece 50. That is, the hole 52a penetrates from the large diameter portion 16a side to the small diameter portion 17a side. Further, a step portion 18a is formed between the large diameter portion 16a and the small diameter portion 17a. The split piece 51 has the same structure as the split piece 50. That is, the split piece 51 has a large diameter portion 16b, a small diameter portion 17b, and a step portion 18b, and a hole 52b is provided at the center. The inner diameter of the hole 52a of the split piece 50 (the hole 52b of the split piece 51) has a size that allows the mounting portion 20c of the shaft 20 to be inserted.

下部回転体１５は、軸２０の装着部２０ｃに、分割片５０，介在部材１９，分割片５１を配置している。すなわち、分割片５０の孔５２ａ、介在部材１９の孔１９ａ、分割片５１の孔５２ｂに、軸２０の装着部２０ｃが挿通されている。そして、軸２０のねじ部２０ａには座金５４ａが嵌まっており、さらにボルト５３ａが螺合している。また、ねじ部２０ｂには座金５４ｂが嵌まっており、さらにボルト５３ｂが螺合している。このように、下部回転体１５（図５）が構成されている。ここで、介在部材１９は、被加熱物１００の幅寸法に合わせて用いる。すなわち、被加熱物１００の幅が大きければ、幅の広い介在部材１９を使用する。よって、仮に被加熱物１００の幅寸法が小さければ、介在部材１９は設ける必要がない。 In the lower rotating body 15, the split piece 50, the interposed member 19, and the split piece 51 are arranged on the mounting portion 20 c of the shaft 20. That is, the mounting portion 20 c of the shaft 20 is inserted through the hole 52 a of the split piece 50, the hole 19 a of the interposed member 19, and the hole 52 b of the split piece 51. A washer 54a is fitted into the threaded portion 20a of the shaft 20, and a bolt 53a is further screwed. Further, a washer 54b is fitted into the screw portion 20b, and a bolt 53b is screwed. Thus, the lower rotating body 15 (FIG. 5) is configured. Here, the interposition member 19 is used in accordance with the width dimension of the article to be heated 100. That is, if the width of the object to be heated 100 is large, the wide interposed member 19 is used. Therefore, if the width dimension of the article to be heated 100 is small, the interposition member 19 need not be provided.

軸２０は、図示しない架台に回転可能に設置されている。よって、下部回転体１５は、その場で回転が可能である。 The axis | shaft 20 is rotatably installed in the mount frame which is not shown in figure. Therefore, the lower rotating body 15 can be rotated on the spot.

支持機構１０の押圧部材１３は、図１に示すように、上部回転体２１と付勢部材２２とを有する。上部回転体２１は、中心に軸４６が挿通されており、軸４６を中心に回転可能である。付勢部材２２は、図示しないエアシリンダで往復駆動されるアーム部４７ａ，４７ｂを有する。軸４６は、アーム部４７ａ，４７ｂの先端（下端）を貫通しており、軸４６が、アーム部４７ａ，４７ｂで支持されている。すなわち、図示しないエアシリンダを駆動すると、軸４６（上部回転体２１）は往復移動することができる。 As shown in FIG. 1, the pressing member 13 of the support mechanism 10 includes an upper rotating body 21 and an urging member 22. The upper rotating body 21 has a shaft 46 inserted through the center thereof, and can rotate around the shaft 46. The urging member 22 has arm portions 47a and 47b that are reciprocally driven by an air cylinder (not shown). The shaft 46 passes through the tips (lower ends) of the arm portions 47a and 47b, and the shaft 46 is supported by the arm portions 47a and 47b. That is, when an air cylinder (not shown) is driven, the shaft 46 (upper rotating body 21) can reciprocate.

支持部材１２と押圧部材１３とで構成される複数（図１では２つのみ描写）の支持ユニット１４が、被加熱物１００の搬送経路に沿って所定の間隔を置いて配置される。 A plurality of (only two depicted in FIG. 1) support units 14 composed of the support member 12 and the pressing member 13 are arranged at a predetermined interval along the conveyance path of the article to be heated 100.

搬送装置１１（図１）は、モータである。搬送装置１１は、図示しない制御装置によって制御され、複数の支持ユニット１４（支持部材１２）の下部回転体１５のうちの少なくとも一つを回転駆動する。 The transport device 11 (FIG. 1) is a motor. The transport device 11 is controlled by a control device (not shown) and rotationally drives at least one of the lower rotating bodies 15 of the plurality of support units 14 (support members 12).

さらに高周波焼入装置１は、矯正部材５５〜５８と、本発明の特徴的な構成である矯正部材２５，冷却液供給装置２６とを有する。 Furthermore, the induction hardening apparatus 1 includes correction members 55 to 58, a correction member 25 and a coolant supply device 26, which are characteristic configurations of the present invention.

図１，図６に示すように、矯正部材５５，５６は、高周波焼入装置１の図示しない筐体に固定されており、先端（下端）が、被加熱物１００の上面９７に近接配置されている。すなわち、矯正部材５５，５６の先端と、上面９７の間には若干の隙間が設けられている。この隙間は、被加熱物１００から加熱導体３までの距離よりも小さい。矯正部材５５は加熱導体３よりも上流側（被加熱物１００の搬送経路の上流側）の直近に配置されている。また、矯正部材５６は加熱導体３よりも下流側の直近に配置されている。 As shown in FIGS. 1 and 6, the correction members 55 and 56 are fixed to a casing (not shown) of the induction hardening apparatus 1, and the tip (lower end) is disposed close to the upper surface 97 of the object to be heated 100. ing. That is, a slight gap is provided between the tips of the correction members 55 and 56 and the upper surface 97. This gap is smaller than the distance from the object to be heated 100 to the heating conductor 3. The correction member 55 is arranged in the immediate vicinity of the upstream side of the heating conductor 3 (upstream side of the conveyance path of the heated object 100). Further, the correction member 56 is disposed in the immediate vicinity of the downstream side of the heating conductor 3.

同様に、矯正部材５７，５８（図６）は、高周波焼入装置１の図示しない筐体に固定されて、被加熱物１００の下側に配置されている。矯正部材５７，５８の先端（上端）と、被加熱物１００の下面９６の間には、若干の隙間が設けられている。この隙間は、被加熱物１００から加熱導体３までの距離よりも小さい。矯正部材５７は、矯正部材５５の真下に配置されており、矯正部材５８は矯正部材５６の真下に配置されている。 Similarly, the correction members 57 and 58 (FIG. 6) are fixed to a casing (not shown) of the induction hardening apparatus 1 and are arranged below the object to be heated 100. A slight gap is provided between the tips (upper ends) of the correction members 57 and 58 and the lower surface 96 of the article to be heated 100. This gap is smaller than the distance from the object to be heated 100 to the heating conductor 3. The correction member 57 is disposed directly below the correction member 55, and the correction member 58 is disposed directly below the correction member 56.

図６のＡ−Ａ断面図である図７は、加熱導体３の直線部２３ａ〜２３ｄを含む横断面図である。この横断面内には、矯正部材２５と、冷却液供給装置２６が配置されている。 FIG. 7 which is an AA cross-sectional view of FIG. 6 is a transverse cross-sectional view including the straight portions 23 a to 23 d of the heating conductor 3. Within the cross section, a correction member 25 and a coolant supply device 26 are arranged.

図７に示すように、矯正部材２５は、高周波焼入装置１の、図示しない筐体に固定されており、加熱導体３における、環４２と環４３の間（各直線部２３ａ〜２３ｄの長さの範囲内）に配置されている。また、矯正部材２５の先端（下端）は、上面９７に近接配置されている。矯正部材２５の先端と、被加熱物１００の上面９７の間には、隙間Ｇ（所定間隔）が設けられている。この隙間Ｇは、被加熱物１００から加熱導体３までの距離Ｄよりも小さい。 As shown in FIG. 7, the correction member 25 is fixed to a casing (not shown) of the induction hardening apparatus 1, and between the ring 42 and the ring 43 in the heating conductor 3 (the length of each linear portion 23 a to 23 d). (Within the range). Further, the front end (lower end) of the correction member 25 is disposed close to the upper surface 97. A gap G (predetermined interval) is provided between the tip of the correction member 25 and the upper surface 97 of the object to be heated 100. This gap G is smaller than the distance D from the object to be heated 100 to the heating conductor 3.

冷却液供給装置２６（図７）は、ノズル２７と矯正部２８とを有する。ノズル２７は、被加熱物１００の下面９６に対向している。また、矯正部２８は、冷却液供給装置２６本体に起立して設けられたブロック状の部材である。矯正部２８の先端と、被加熱物１００の下面９６の間には隙間が設けられる。この隙間は、矯正部材２５の先端から被加熱物１００の上面までの距離Ｇと同等であり、被加熱物１００から加熱導体３までの距離Ｄよりも小さい。 The coolant supply device 26 (FIG. 7) includes a nozzle 27 and a correction unit 28. The nozzle 27 faces the lower surface 96 of the article to be heated 100. Moreover, the correction | amendment part 28 is a block-shaped member standingly provided in the cooling fluid supply apparatus 26 main body. A gap is provided between the tip of the correction unit 28 and the lower surface 96 of the article 100 to be heated. This gap is equivalent to the distance G from the tip of the correction member 25 to the upper surface of the object to be heated 100, and is smaller than the distance D from the object to be heated 100 to the heating conductor 3.

高周波焼入装置１は、以上説明した構成を備えている。以下では、この高周波焼入装置１の動作について説明する。
まず、図示しない搬送装置によって、被加熱物１００を高周波焼入装置１の近くまで搬送する。そして被加熱物１００の先端部を、搬送経路上の最も上流側に配置されている支持ユニット１４の支持部材１２と押圧部材１３の間で挟持する。そして搬送装置１１を駆動し、下部回転体１５を回転させ、被加熱物１００を所定の速さで移動させる。 The induction hardening apparatus 1 has the configuration described above. Below, operation | movement of this induction hardening apparatus 1 is demonstrated.
First, the object to be heated 100 is transported to the vicinity of the induction hardening apparatus 1 by a transport device (not shown). And the front-end | tip part of the to-be-heated material 100 is clamped between the support member 12 and the press member 13 of the support unit 14 arrange | positioned most upstream on a conveyance path | route. And the conveying apparatus 11 is driven, the lower rotary body 15 is rotated, and the to-be-heated material 100 is moved at predetermined speed.

高周波電源８をＯＮとし、加熱導体３に高周波電流を供給する。その際、対向部２４ａの直線部２３ａと直線部２３ｂには高周波電流が同期して同方向に流れる。また、対向部２４ｂの直線部２３ｃと直線部２３ｄにも高周波電流が同期して同方向に流れる。 The high frequency power supply 8 is turned on to supply a high frequency current to the heating conductor 3. At that time, the high-frequency current flows in the same direction in synchronism with the straight portions 23a and 23b of the facing portion 24a. Further, the high-frequency current also flows in the same direction in the linear portion 23c and the linear portion 23d of the facing portion 24b in synchronization.

被加熱物１００の焼入れ対象部位９９ａ，９９ｂは、静止する加熱導体３の対向部２４ａ，２４ｂに接近し、やがて図７に示すように対向する。加熱導体３には高周波電流が流れ、対向部２４ａ，２４ｂと対向する焼入れ対象部位９９ａには高周波の誘導電流が励起される。そして焼入れ対象部位９９ａ，９９ｂは、対向部２４ａ，２４ｂを通過するまで誘導加熱される。 The quenching target portions 99a and 99b of the article to be heated 100 approach the opposed portions 24a and 24b of the stationary heating conductor 3, and eventually face each other as shown in FIG. A high-frequency current flows through the heating conductor 3, and a high-frequency induced current is excited in the quenching target portion 99 a that faces the facing portions 24 a and 24 b. And quenching object part 99a, 99b is induction-heated until it passes opposing part 24a, 24b.

また、被加熱物１００における、対向部２４ａ，２４ｂと対向する範囲が、同時に誘導加熱される。冷却液供給装置２６は、対向部２４ａ，２４ｂで誘導加熱される範囲内の中央部分の下面９６と対向している。そして、誘導加熱中、冷却液供給装置２６のノズル２７から冷却液が噴射供給され、被加熱物１００の下面９６が冷却される。すなわち、被加熱物１００は、側面（溝９８ａ，９８ｂ）が誘導加熱されると同時に、下面９６が冷却される。冷却液供給装置２６による冷却液の噴射量は、被加熱物１００の歪みが小さくなる程度に調整される。 Moreover, the range which opposes the opposing parts 24a and 24b in the to-be-heated material 100 is induction-heated simultaneously. The coolant supply device 26 faces the lower surface 96 of the central portion within the range where induction heating is performed by the facing portions 24a and 24b. During the induction heating, the cooling liquid is jetted and supplied from the nozzle 27 of the cooling liquid supply device 26, and the lower surface 96 of the object to be heated 100 is cooled. That is, in the object to be heated 100, the side surfaces (grooves 98a and 98b) are induction-heated, and at the same time, the lower surface 96 is cooled. The injection amount of the cooling liquid by the cooling liquid supply device 26 is adjusted so that the distortion of the article to be heated 100 is reduced.

さらに、加熱導体３を通過した焼入れ対象部位９９ａ，９９ｂ（溝９８ａ，９８ｂ）は、加熱導体３の下流側に配置された冷却装置９ａ，９ｂと順次対向する。そして冷却装置９ａ、９ｂのノズル４５から焼入れ対象部位９９ａ，９９ｂに向けて冷却液が噴射供給され、焼入れ対象部位９９ａ，９９ｂは急冷される。 Further, the quenching target portions 99a and 99b (grooves 98a and 98b) that have passed through the heating conductor 3 sequentially face the cooling devices 9a and 9b disposed on the downstream side of the heating conductor 3. Then, the cooling liquid is jetted and supplied from the nozzles 45 of the cooling devices 9a and 9b toward the quenching target portions 99a and 99b, and the quenching target portions 99a and 99b are rapidly cooled.

被加熱物１００が、連続的に誘導加熱及び急冷されると、被加熱物１００は歪む。しかし、本実施形態では、被加熱物１００の上下には、適宜矯正部材等が配置されているので、被加熱物１００から加熱導体３（対向部２４ａ，２４ｂ）までの距離が、所定範囲内に保たれる。 When the object to be heated 100 is continuously induction-heated and rapidly cooled, the object to be heated 100 is distorted. However, in the present embodiment, since correction members and the like are appropriately disposed above and below the object to be heated 100, the distance from the object to be heated 100 to the heating conductor 3 (opposing portions 24a and 24b) is within a predetermined range. To be kept.

ところで、被加熱物１００の後端部９５が、加熱導体３の上流側の矯正部材５５，５７を通過すると、矯正部材５５，５７による矯正がなくなる。その結果、被加熱物１００の後端部９５は、上方又は下方に歪む。しかし、本実施形態の高周波焼入装置１では、被加熱物１００の後端部９５が、加熱導体３の上流側直近の矯正部材５５，５７を通過しても、被加熱物１００の上面９７又は下面９６が、矯正部材２５、又は冷却液供給装置２６の矯正部２８に当接して、歪み量が規制される。そのため、被加熱物１００（焼入れ対象部位９９ａ，９９ｂ）と、加熱導体３（対向部２４ａ，２４ｂ）の、後述の図９及び図１１に示す隙間（Ｄ−Ｇ）は、焼入れの品質を保つ上で必要な所定範囲内に収まる。 By the way, when the rear end portion 95 of the article to be heated 100 passes through the correction members 55 and 57 on the upstream side of the heating conductor 3, the correction by the correction members 55 and 57 is lost. As a result, the rear end portion 95 of the article to be heated 100 is distorted upward or downward. However, in the induction hardening apparatus 1 of the present embodiment, the upper surface 97 of the object to be heated 100 even if the rear end portion 95 of the object to be heated 100 passes through the correction members 55 and 57 on the upstream side of the heating conductor 3. Alternatively, the lower surface 96 comes into contact with the correction member 25 or the correction unit 28 of the coolant supply device 26, and the amount of distortion is regulated. Therefore, the gap (D-G) shown in FIGS. 9 and 11 described later between the object to be heated 100 (quenching target portions 99a and 99b) and the heating conductor 3 (opposing portions 24a and 24b) maintains the quality of quenching. It falls within the predetermined range required above.

図８及び図９は、後端部９５が矯正部材５５，５７を通過し、さらに被加熱物１００が歪み、後端部９５が下方へ移動した状態を示す。被加熱物１００の下面９６が、冷却液供給装置２６の矯正部２８に当接することにより、被加熱物１００の歪み量は規制される。その結果、直線部２３ａ，２３ｃと、焼入れ対象部位９９ａ，９９ｂの間隔が小さくなるものの、当該間隔は、焼入れ品質を所定レベルに保つ間隔に維持される。すなわち、図９に示すように、直線部２３ａ，２３ｃと、溝９８ａ，９８ｂの間には、隙間（Ｄ−Ｇ）が確保されている。隙間（Ｄ−Ｇ）は、被加熱物１００から加熱導体３までの距離Ｄ（図７）と、隙間Ｇ（図７）の差である。 8 and 9 show a state where the rear end portion 95 has passed through the correction members 55 and 57, the article to be heated 100 is further distorted, and the rear end portion 95 has moved downward. The amount of distortion of the object to be heated 100 is regulated by the lower surface 96 of the object to be heated 100 coming into contact with the correction unit 28 of the coolant supply device 26. As a result, although the interval between the straight portions 23a and 23c and the portions to be quenched 99a and 99b becomes small, the interval is maintained at an interval that maintains the quenching quality at a predetermined level. That is, as shown in FIG. 9, a gap (DG) is secured between the straight portions 23a and 23c and the grooves 98a and 98b. The gap (D−G) is a difference between the distance D (FIG. 7) from the article to be heated 100 to the heating conductor 3 and the gap G (FIG. 7).

直線部２３ａ，２３ｃと溝９８ａ，９８ｂの間の隙間は、隙間Ｄを基準に、隙間（Ｄ−Ｇ）から隙間（Ｄ＋Ｇ）の範囲であれば、焼入れ深さが略一様とみなすことができる。すなわち、直線部２３ａ，２３ｃから溝９８ａ，９８ｂまでの距離の変動は、隙間Ｇの範囲で許容される。一般に、焼入れ深さは、２ｍｍ〜４ｍｍの範囲内であれば良好であり、被加熱物１００が歪んで、矯正部２８に当接したとしても、被加熱物１００の後端部９５の焼入れ深さが、２ｍｍ〜４ｍｍの範囲となるように、隙間Ｇを設定する。 The clearance between the straight portions 23a and 23c and the grooves 98a and 98b can be regarded as having a substantially uniform quenching depth if the clearance D is a range from the clearance (DG) to the clearance (D + G). it can. That is, the variation in the distance from the straight portions 23a and 23c to the grooves 98a and 98b is allowed in the range of the gap G. In general, the quenching depth is good as long as it is in the range of 2 mm to 4 mm. Even if the article to be heated 100 is distorted and comes into contact with the correction portion 28, the quenching depth of the rear end portion 95 of the article to be heated 100 is hardened. Is set to be in a range of 2 mm to 4 mm.

また、図１０及び図１１は、被加熱物１００が歪み、後端部９５が上方へ移動した状態を示す。被加熱物１００の上面が、矯正部材２５に当接することにより、被加熱物１００は矯正される。その結果、直線部２３ｂ，２３ｄと焼入れ対象部位９９ａ，９９ｂの間隔が小さくなるものの、当該間隔は、焼入れ品質を所定レベルに保つ間隔に維持される。すなわち、図９に示すように、直線部２３ｂ，２３ｄと、溝９８ａ，９８ｂの間には、隙間（Ｄ−Ｇ）が確保されている。その結果、被加熱物１００が歪んで矯正部材２５に当接したとしても、被加熱物１００の後端部９５付近の焼入れ深さは、２ｍｍ〜４ｍｍの範囲内に収まる。 10 and 11 show a state where the object to be heated 100 is distorted and the rear end portion 95 is moved upward. The heated object 100 is corrected by the upper surface of the heated object 100 coming into contact with the correction member 25. As a result, although the interval between the straight portions 23b and 23d and the quenching target portions 99a and 99b becomes small, the interval is maintained at an interval that maintains the quenching quality at a predetermined level. That is, as shown in FIG. 9, a gap (DG) is secured between the straight portions 23b and 23d and the grooves 98a and 98b. As a result, even if the object to be heated 100 is distorted and comes into contact with the correction member 25, the quenching depth in the vicinity of the rear end portion 95 of the object to be heated 100 falls within the range of 2 mm to 4 mm.

本実施形態の高周波焼入装置１では、被加熱物１００の後端部９５が、矯正部材５５，５７を通過しても、矯正部材２５や冷却液供給装置２６の矯正部２８を設けることによって、被加熱物１００（溝９８ａ，９８ｂ）が、加熱導体（直線部２３ｂ，２３ｄ）と接触することがなく、被加熱物１００及び加熱導体３を損傷させる事態を、確実に回避することができる。 In the induction hardening apparatus 1 of this embodiment, even if the rear end portion 95 of the article to be heated 100 passes through the correction members 55 and 57, the correction member 25 and the correction portion 28 of the coolant supply device 26 are provided. The object to be heated 100 (grooves 98a and 98b) does not come into contact with the heating conductor (straight line portions 23b and 23d), and the situation in which the object to be heated 100 and the heating conductor 3 are damaged can be reliably avoided. .

また、本実施形態では、加熱導体３の環４２と環４３の間に配置した矯正部材は１つであるが、矢印Ｆで示す被加熱物１００の搬送方向に沿って複数個を配置してもよい。例えば、環４２と環４３の間における、環４２の近傍や環４３の近傍に矯正部材を配置することもできる。さらに、矯正部材の形状は、図示したものに限らず、どのような形状であっても差し支えない。 Moreover, in this embodiment, although the correction | amendment member arrange | positioned between the ring 42 and the ring 43 of the heating conductor 3 is one, several are arrange | positioned along the conveyance direction of the to-be-heated material 100 shown by the arrow F. Also good. For example, a correction member can be disposed between the ring 42 and the ring 43 in the vicinity of the ring 42 or in the vicinity of the ring 43. Furthermore, the shape of the correction member is not limited to that shown in the figure, and any shape may be used.

１高周波焼入装置
２誘導加熱装置
３加熱導体
９ａ，９ｂ冷却装置
２３ａ〜２３ｄ加熱導体の直線部
２４ａ，２４ｂ加熱導体の対向部
２５矯正部材
２６冷却液供給装置
２８冷却液供給装置の矯正部
９６被加熱物の下面
９７被加熱物の上面
９８ａ，９８ｂ溝
９９ａ，９９ｂ焼入れ対象部位
１００被加熱物
１００ａ被加熱物の側面（表面）
Ｇ隙間（所定間隔） DESCRIPTION OF SYMBOLS 1 Induction hardening apparatus 2 Induction heating apparatus 3 Heating conductor 9a, 9b Cooling apparatus 23a-23d Straight part 24a, 24b of heating conductor 25 Opposed part 25 of heating conductor 26 Correction member 26 Coolant supply apparatus 28 Correction part 96 of cooling liquid supply apparatus Lower surface 97 of heated object Upper surface 98a, 98b of heated object Groove 99a, 99b Quenching target part 100 Heated object 100a Side surface (surface) of heated object
G gap (predetermined interval)

Claims

An induction hardening apparatus for induction hardening a groove extending in a longitudinal direction formed on a surface of a long object to be heated, the induction hardening apparatus having a heating conductor for induction heating the groove An induction heating device and a cooling device for rapidly cooling the induction-heated groove;
The heating conductor has a facing portion extending in the longitudinal direction of the object to be heated,
The opposing portion is opposed to a portion of the longitudinal grooves of the object to be heated is accommodated in the groove of the heated object,
The induction hardening apparatus is for induction hardening the grooves in order while moving the object to be heated in the longitudinal direction relative to the induction heating apparatus and the cooling apparatus,
Correction members are arranged in each of the upstream side in the relative movement direction of the heated object in the heating conductor, the downstream side, and the cross section including the part being heated of the heated object,
Each of the correction members is arranged at a predetermined interval from the surface in the direction in which the heated object to be heated is distorted, and regulates the amount of distortion of the heated object.
And contact with the straightening member is distorted object to be heated, wherein the straightening member is induction hardening apparatus characterized that you restrict the distorted object to be heated more.

The surface of the object to be heated on which the groove is formed is a side surface, the lower surface of the object to be heated, and the coolant that injects the coolant into the cross section including the part being heated of the object to be heated The induction hardening apparatus according to claim 1, further comprising a supply device.

A part of the coolant supply device constitutes a correction part,
The correction part is arranged at a predetermined interval from the lower surface of the object to be heated,
The straightening part regulates the amount of distortion of the object to be heated,
The distance from the groove to the heating conductor is restricted to a distance at which a quenching depth is equal to or less than a predetermined depth when the object to be heated is distorted and abuts on the correction portion. Induction hardening equipment.