JP4405526B2 - Guide tip structure for high frequency induction heating coil - Google Patents

Guide tip structure for high frequency induction heating coil Download PDF

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JP4405526B2
JP4405526B2 JP2007099368A JP2007099368A JP4405526B2 JP 4405526 B2 JP4405526 B2 JP 4405526B2 JP 2007099368 A JP2007099368 A JP 2007099368A JP 2007099368 A JP2007099368 A JP 2007099368A JP 4405526 B2 JP4405526 B2 JP 4405526B2
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frequency induction
induction heating
heating coil
high frequency
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JP2008255424A (en
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精一 沢津橋
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Denki Kogyo Co Ltd
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00Technologies related to metal processing
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Description

本発明は、半開放鞍型高周波誘導加熱コイルを支持する一対の側板の間にそれぞれ取付けられた複数個の高周波誘導加熱コイル用ガイドチップであって、クランクシャフトのジャーナル部又はピン部を半開放鞍型高周波誘導加熱コイルにより高周波誘導加熱する際に、半開放鞍型高周波誘導加熱コイルに対するジャーナル部又はピン部の中心の位置決め、並びに、クランクシャフトの互いに隣り合うカウンタウエイト部の間のジャーナル部又はピン部の幅方向における半開放鞍型高周波誘導加熱コイルの位置決めを行うための高周波誘導加熱コイル用ガイドチップの構造に係り、特に、ジャーナル部やピン部に形成される焼入硬化層の焼逃げ範囲が規格値を十分に満足することができるような高周波誘導加熱コイル用ガイドチップの構造に関する。   The present invention relates to a plurality of high frequency induction heating coil guide chips mounted between a pair of side plates that support a semi-open saddle type high frequency induction heating coil, wherein the journal portion or pin portion of the crankshaft is half open. Positioning of the center of the journal part or pin part with respect to the semi-open saddle type high frequency induction heating coil, and the journal part or pin between the counterweight parts adjacent to each other on the crankshaft Related to the structure of a guide tip for a high-frequency induction heating coil for positioning a semi-open saddle type high-frequency induction heating coil in the width direction of the part, and in particular, the range of erosion of a hardened hardened layer formed in a journal part or a pin part Is related to the structure of the guide tip for a high frequency induction heating coil that can sufficiently satisfy the standard value. That.

図9に示すように、被加熱物であるクランクシャフト1は、中心軸であるジャーナル部2と、互いに隣り合うジャーナル部2の間に配置されるカウンタウエイト部3と、相対向するカウンタウエイト部3の間に設けられるピン部4等とからなり、これらのジャーナル部2やピン部4は高周波誘導加熱されて焼入処理される。この焼入方法としては、フラット焼入やフィレットR焼入等があるが、いずれにしても焼入硬化層がジャーナル部2やピン部4に正しく形成される必要がある。なお、ジャーナル部2やピン部4を高周波誘導加熱するための高周波誘導加熱装置としては、例えば、特開2002−226919号公報(特許文献1)の図1に示されるようなものが従来より採用されている。   As shown in FIG. 9, the crankshaft 1 that is an object to be heated includes a journal portion 2 that is a central axis, a counterweight portion 3 that is disposed between adjacent journal portions 2, and counterweight portions that face each other. The journal part 2 and the pin part 4 are subjected to high-frequency induction heating and quenching treatment. As this quenching method, there are flat quenching, fillet R quenching and the like, but in any case, the quench hardened layer needs to be correctly formed on the journal portion 2 and the pin portion 4. In addition, as a high frequency induction heating apparatus for high frequency induction heating of the journal part 2 and the pin part 4, what was conventionally shown by FIG. 1 of Unexamined-Japanese-Patent No. 2002-226919 (patent document 1) is employ | adopted conventionally. Has been.

特開2002−226919号公報に記載の高周波誘導加熱装置は、その図1に示すような装置構造となっているが、図10は、これと近似する半開放鞍型高周波誘導加熱コイル5を用いている高周波誘導加熱装置6を示す。   The high-frequency induction heating apparatus described in Japanese Patent Application Laid-Open No. 2002-226919 has an apparatus structure as shown in FIG. 1, but FIG. 10 uses a semi-open saddle type high-frequency induction heating coil 5 that approximates this. The high-frequency induction heating device 6 is shown.

この高周波誘導加熱装置6は、図10に示すように、装置本体側に連結されて互いに対向配置される一対の側板7と、側板7の下端側の開口部に配置されて側板7に支持される半開放鞍型高周波誘導加熱コイル5と、この半開放鞍型高周波誘導加熱コイル5に対応する所定位置(本例ではクランクシャフト1のジャーナル部2の中心線に対して上側部、並びに、ジャーナル部2の中心線に対して左右両側部の3箇所)に配置されて側板7に取付けられる高周波誘導加熱コイル用ガイドチップ8a、8b,8c等とからなり、半開放鞍型高周波誘導加熱コイル5には給電用リード導体9が連結され、クランクシャフト1の加熱部を急速冷却するための冷却水供給手段10等が設けられている。なお、高周波誘導加熱コイル用ガイドチップ8a,8b,8cは、クランクシャフト1のジャーナル部2(又はピン部4)を半開放鞍型高周波誘導加熱コイル5により高周波誘導加を行うに際して、ジャーナル部2(又はピン部4)と半開放鞍型高周波誘導加熱コイル5との間に所定の隙間(0.5mm〜3.5mm程度)を確保するための部材であり、これらのガイドチップ8a,8b,8cを介して半開放鞍型高周波誘導加熱コイル5がクランクシャフト1の軸線(ジャーナル部2の中心線)を中心に回転されるジャーナル部2(又はピン部4)上に載置されるようになっている。この際、ジャーナル部2の外周面へのガイドチップ8a,8b,8cの当接作用により、半開放鞍型高周波誘導加熱コイル5に対するジャーナル部2(又はピン部4)の中心の位置決めがなされる。 As shown in FIG. 10, the high-frequency induction heating device 6 is supported by the side plate 7 and a pair of side plates 7 that are connected to the device main body side and arranged opposite to each other, and an opening on the lower end side of the side plate 7. A semi-open saddle type high frequency induction heating coil 5 and a predetermined position corresponding to the half open saddle type high frequency induction heating coil 5 (in this example, an upper part with respect to the center line of the journal part 2 of the crankshaft 1 and a journal) The high-frequency induction heating coil guide tips 8a, 8b, 8c, etc., which are disposed on the left and right sides of the center line of the portion 2 and attached to the side plate 7, are semi-open saddle type high-frequency induction heating coils 5. Is connected to a power supply lead conductor 9 and is provided with a cooling water supply means 10 for rapidly cooling the heating portion of the crankshaft 1. It should be noted that the high frequency induction heating coil guide tip 8a, 8b, when 8c performs high-frequency induction pressure heat by semi-open saddle type high frequency induction heating coil 5 a journal portion 2 of the crankshaft 1 (or pin portion 4), the journal portion 2 (or pin portion 4) and a member for securing a predetermined gap (about 0.5 mm to 3.5 mm) between the half-open saddle type high frequency induction heating coil 5, and these guide chips 8a, 8b , 8c so that the semi-open saddle type high frequency induction heating coil 5 is placed on the journal part 2 (or the pin part 4) rotated about the axis of the crankshaft 1 (center line of the journal part 2). It has become. At this time, the center of the journal part 2 (or the pin part 4) is positioned with respect to the semi-open saddle type high frequency induction heating coil 5 by the contact action of the guide tips 8a, 8b, 8c with the outer peripheral surface of the journal part 2. .

以上の構造の従来の高周波誘導加熱装置6に設けられている高周波誘導加熱コイル用ガイドチップ8a,8b,8cは、通常、図11(a),(b)に示すものからなる。すなわち、ギャップ11を介して相対向して配置される側板7,7と、それぞれの側板7,7の内面側に接触して配置されるチップ12,12と、これらのチップ12,12間に介設されるチップ固定板13と、側板7,7とチップ12,12とチップ固定板13とを一体的に密接固定するビス14,14等とからなる。ここでチップ12,12間の外面間の幅寸法L1(図11(a)参照)は一定のもの(可変ではなく固定のもの)からなり、この幅寸法L1をクランクシャフト1のジャーナル部2又はピン部4の幅寸法L2又はL3(図9参照)にほぼ等しくすることが必要になる。 The high-frequency induction heating coil guide tips 8a, 8b, 8c provided in the conventional high-frequency induction heating device 6 having the above-described structure are usually formed as shown in FIGS. 11 (a) and 11 (b). That is, the side plates 7 and 7 arranged opposite to each other with the gap 11 interposed therebetween, the chips 12 and 12 arranged in contact with the inner surfaces of the side plates 7 and 7, and the chips 12 and 12 between them. The chip fixing plate 13 is interposed, and the side plates 7 and 7, the chips 12 and 12, and the screws 14 and 14 for fixing the chip fixing plate 13 in close contact with each other. Here, the width L 1 between the outer surfaces of the chips 12 and 12 (see FIG. 11A) is a constant (not variable but fixed), and this width L 1 is the journal portion of the crankshaft 1. 2 or the width dimension L 2 or L 3 of the pin portion 4 (see FIG. 9) needs to be substantially equal.

しかしながら、この幅寸法L1を、例えば、ジャーナル部2の幅寸法L2と全く同一にするとガイドチップ8a,8b,8cをジャーナル部2上に載置すべくこのジャーナル部2の両側のカウンタウエイト部3,3間に挿入する際に円滑に行かないため、若干ながらL1<L2に設定する必要がある。また、仮にある型式のクランクシャフト1のジャーナル部2の幅寸法L2と同一の幅寸法L1を有する高周波誘導加熱コイル用ガイドチップを使用するとしても、ほぼ寸法の近い他型式のクランクシャフト1であってジャーナル部2の外径寸法は同一で幅寸法がL2よりもやや大きいクランクシャフト1に対して同一の高周波誘導加熱コイル用ガイドチップを併用する場合には、クランクシャフト1のカウンタウエイト部3と高周波誘導加熱コイル用ガイドチップとの間に隙間が生じることとなる。なお、図12(a)は、チップ12の外面とカウンタウエイト部3の内面との間に隙間δが生じている状況を示すものであり、ジャーナル部2の幅寸法L2に対して高周波誘導加熱コイル用ガイドチップ8a(及び8b,8c)の幅寸法L1が小さく隙間δが生じている場合を示している。この場合には、半開放鞍型高周波誘導加熱コイル5が高周波誘導加熱コイル用ガイドチップ8a(及び8b,8c)と同様にジャーナル部2の幅方向の中心位置からずれた位置においてジャーナル部2の外周面に対向配置されることとなる。 However, if the width dimension L 1 is made exactly the same as, for example, the width dimension L 2 of the journal section 2, the counterweights on both sides of the journal section 2 in order to place the guide chips 8 a, 8 b, 8 c on the journal section 2. Since it does not go smoothly when inserted between the portions 3 and 3, it is necessary to set L 1 <L 2 slightly. Even if a guide chip for a high-frequency induction heating coil having the same width dimension L 1 as the width dimension L 2 of the journal portion 2 of a certain type of crankshaft 1 is used, another type of crankshaft 1 having a substantially similar size. When the same high frequency induction heating coil guide tip is used together with the crankshaft 1 having the same outer diameter dimension and the width dimension slightly larger than L 2 , the counterweight of the crankshaft 1 is used. A gap is generated between the portion 3 and the guide tip for the high frequency induction heating coil. FIG. 12A shows a situation in which a gap δ is generated between the outer surface of the chip 12 and the inner surface of the counterweight portion 3, and high frequency induction is performed with respect to the width dimension L 2 of the journal portion 2. heating coil guide tip 8a (and 8b, 8c) the width L 1 of which shows a case where a small gap δ is generated. In this case, the half-open saddle type high frequency induction heating coil 5 is located at a position shifted from the center position in the width direction of the journal portion 2 in the same manner as the guide tip 8a (and 8b, 8c) for the high frequency induction heating coil. It will be arranged facing the outer peripheral surface.

このように隙間δがある状態でフラット焼入のためにクランクシャフト1をその軸線(ジャーナル部2の中心線)を中心に回転させながらジャーナル部2の外周面を高周波誘導加熱すると、図12(b)に示すように焼入硬化層S1がジャーナル部2の幅方向の中心よりずれた位置(例えば右側にずれた位置)に形成され、焼入硬化層S1の両端部とカウンタウエイト部3の内面までの寸法α及びβが同一とならない問題点が生じる。この寸法αやβを「焼逃げ範囲」と言い、この寸法には規格値が定められているが、この規値を満足しない場合が生じる。 When the outer peripheral surface of the journal portion 2 is rotated by high-frequency induction while rotating the crankshaft 1 about its axis (center line of the journal portion 2) for flat quenching with the gap δ in this manner, FIG. As shown in b), the hardened and hardened layer S 1 is formed at a position shifted from the center of the journal portion 2 in the width direction (for example, a position shifted to the right), and both end portions of the hardened and hardened layer S 1 and the counterweight portion. This causes a problem that the dimensions α and β up to the inner surface 3 are not the same. The dimensions α and β is referred to as "baked fled range", but this is the dimensions are standard value is defined, is not satisfied occurs this Tadashi rated value.

また、クランクシャフト1をその軸線を中心に回転させながらジャーナル部2の外周面を高周波誘導加熱してフィレットR焼入を行う場合には、図12(c)に示すように高周波誘導加熱コイル用ガイドチップ8a(及び8b,8c)とクランクシャフト1のカウンタウエイト部3との間に隙間δがあるためにジャーナル部2の幅方向における高周波誘導加熱コイル用ガイドチップ8a(及び8b,8c)の位置決めが正しくなされないと、半開放鞍型高周波誘導加熱コイル5も正しく位置決めがなされず、図12(d)に示すように、フィレットR焼入により形成された焼入硬化層S2のコーナ部における焼入硬化層深さt1とt2との間に差が生じ、規格値を満足しない場合が生じる。 Also, when performing fillet R quenching by high frequency induction heating of the outer peripheral surface of the journal portion 2 while rotating the crankshaft 1 about its axis, as shown in FIG. Since there is a gap δ between the guide tip 8a (and 8b, 8c) and the counterweight portion 3 of the crankshaft 1, the high frequency induction heating coil guide tip 8a (and 8b, 8c) in the width direction of the journal portion 2 is used. When positioning is not performed correctly, semi-open saddle type high frequency induction heating coil 5 is also not performed correctly positioned, as shown in FIG. 12 (d), the corner portion of the hardened layer S 2 formed by fillet R hardening A difference occurs between the hardened layer depths t 1 and t 2 at, and the standard value may not be satisfied.

本発明は、上述のような問題点を解決すべくなされたものであって、その目的は、クランクシャフトのジャーナル部又はピン部の幅方向における高周波誘導加熱コイル用ガイドチップの位置決めを常に正しく行うことができ、ひいては上述の幅方向における半開放鞍型高周波誘導加熱コイル5の位置決めを常に正しく行うことができ、フラット焼入の場合には焼逃げ範囲を、そしてフィレットR焼入の場合には焼入硬化層のコーナ部における焼入深さの規格値を満足できて、精密な焼入をすることができるような高周波誘導加熱コイル用ガイドチップの構造を提供することにある。   The present invention has been made to solve the above-described problems, and its purpose is to always correctly position the guide tip for the high-frequency induction heating coil in the width direction of the journal portion or pin portion of the crankshaft. As a result, the positioning of the half-open saddle type high frequency induction heating coil 5 in the width direction described above can always be performed correctly. In the case of flat quenching, the range of flank escaping, and in the case of fillet R quenching, An object of the present invention is to provide a guide chip structure for a high-frequency induction heating coil that can satisfy the standard value of the quenching depth in the corner portion of the quench-hardened layer and can perform precise quenching.

上述の目的を達成するために、本発明では、半開放鞍型高周波誘導加熱コイルを支持する一対の側板の間にそれぞれ取付けられた複数個の高周波誘導加熱コイル用ガイドチップであって、クランクシャフトのジャーナル部又はピン部を前記半開放鞍型高周波誘導加熱コイルにより高周波誘導加熱する際に、前記半開放鞍型高周波誘導加熱コイルに対する前記ジャーナル部又はピン部の中心の位置決め、並びに、前記クランクシャフトの互いに隣り合うカウンタウエイト部の間の前記ジャーナル部又はピン部の幅方向における前記半開放鞍型高周波誘導加熱コイルの位置決めを行うための高周波誘導加熱コイル用ガイドチップの構造において、前記高周波誘導加熱コイル用ガイドチップは、前記一対の側板にそれぞれ設けられたばね機能を有する一対の可撓体と、互いに対向する前記一対の可撓体の内側にそれぞれ固定配置された一対のチップと、前記一対のチップの内側にそれぞれ固定配置された一対のチップ固定板とを備え、前記ジャーナル部又はピン部が挿入配置される前記側板の開口部にまで延び、かつ、間隔を隔てて互いに対向する一対のスリットを前記側板に形成することにより、前記可撓体を前記側板に一体的に設け、前記高周波誘導加熱コイル用ガイドチップが互いに隣り合う前記カウンタウエイト部の間に挿入されない自由状態の下では、互いに対向する前記一対のチップ固定板の内面の間に隙間が存在するように構成すると共に、互いに対向する前記一対のチップの外面間の幅寸法が前記ジャーナル部又はピン部の幅寸法よりも大きく設定し、前記高周波誘導加熱コイル用ガイドチップが互いに隣り合う前記カウンタウエイト部の間に挿入されるのに伴って、前記一対のチップ固定板の内面の間の前記隙間が前記一対の可撓体のばね機能により狭められ、或いは前記隙間がなくなるように構成している。
た、本発明では、前記高周波誘導加熱コイル用ガイドチップを前記ジャーナル部又はピン部の中心線に対して上方側及び左右両側の3箇所に配置し、これら3個の高周波誘導加熱コイル用ガイドチップが配置される3箇所の全部又は少なくとも1箇所に前記可撓体を設けるようにしている。
In order to achieve the above-described object, the present invention provides a plurality of guide chips for high-frequency induction heating coils respectively attached between a pair of side plates that support a semi-open saddle type high-frequency induction heating coil, When the journal part or the pin part is subjected to high-frequency induction heating by the half-open saddle type high-frequency induction heating coil, positioning of the center of the journal part or pin part with respect to the half-open saddle type high-frequency induction heating coil, and the crankshaft In the structure of a guide tip for a high frequency induction heating coil for positioning the semi-open saddle type high frequency induction heating coil in the width direction of the journal portion or pin portion between adjacent counterweight portions, the high frequency induction heating coil The guide tip has a spring function provided on each of the pair of side plates. Comprising a pair of flexible members, a pair of chips which are fixed respectively disposed inside the pair of flexible bodies facing each other, and a pair of chip fixing plate fixed respectively arranged on the inner side of the pair of chips, The flexible body is integrated with the side plate by forming a pair of slits in the side plate that extend to the opening of the side plate where the journal portion or the pin portion is inserted and are opposed to each other with a gap therebetween. In a free state in which the guide chip for the high frequency induction heating coil is not inserted between the counterweight portions adjacent to each other, there is a gap between the inner surfaces of the pair of chip fixing plates facing each other. And the width dimension between the outer surfaces of the pair of chips facing each other is set larger than the width dimension of the journal part or the pin part, As the coil guide chip is inserted between the counterweight portions adjacent to each other, the gap between the inner surfaces of the pair of chip fixing plates is narrowed by the spring function of the pair of flexible bodies, Alternatively, the gap is eliminated.
Also, in the present invention, the high-frequency induction heating coil guide tip arranged at three positions on the upper side and right and left sides with respect to the center line of the journal portion or a pin portion, these for three high-frequency induction heating coil guide The flexible body is provided in all or at least one of the three places where the chips are arranged.

請求項1に記載の本発明は、高周波誘導加熱コイル用ガイドチップは、一対の側板にそれぞれ設けられたばね機能を有する一対の可撓体と、互いに対向する一対の可撓体の内側にそれぞれ固定配置された一対のチップと、一対のチップの内側にそれぞれ固定配置された一対のチップ固定板とを備え、ジャーナル部又はピン部が挿入配置される側板の開口部にまで延び、かつ、間隔を隔てて互いに対向する一対のスリットを側板に形成することにより、可撓体を側板に一体的に設け、高周波誘導加熱コイル用ガイドチップが互いに隣り合うカウンタウエイト部の間に挿入されない自由状態の下では、互いに対向する一対のチップ固定板の内面の間に隙間が存在するように構成すると共に、互いに対向する一対のチップの外面間の幅寸法がクランクシャフトのジャーナル部又はピン部の幅寸法よりも大きく設定し、高周波誘導加熱コイル用ガイドチップがクランクシャフトの互いに隣り合うカウンタウエイト部の間に挿入されるのに伴って、一対のチップ固定板の内面の間の隙間が一対の可撓体のばね機能により狭められ、或いは隙間がなくなるように構成したものであるから、本発明の高周波誘導加熱コイル用ガイドチップ構造によれば、次のような作用効果を奏することができる。すなわち、高周波誘導加熱コイル用ガイドチップは可撓性のもの(幅寸法が可変のもの)からなるため、ジャーナル部又はピン部の幅方向において互いに隣り合うカウンタウエイト部の間に高周波誘導加熱コイル用ガイドチップを挿入すると、自由状態の下にあるときに互いに隣り合うカウンタウエイト部の間の幅寸法よりも大きい幅寸法を有する高周波誘導加熱コイル用ガイドチップが、側板の可撓体のばね機能により一対のチップ固定板の内面の間の隙間が狭まるように弾性変形し、一対のチップが互いに隣り合うカウンタウエイト部の間に挿入配置されて各カウンタウエイト部に圧接することとなる。これに伴い、互いに隣り合うカウンタウエイト部の間のジャーナル部又はピン部の幅方向における高周波誘導加熱コイル用ガイドチップの位置決めを常に正しく行うことができ、ひいてはジャーナル部又はピン部の幅方向における半開放鞍型高周波誘導加熱コイルの位置決めを常に正確に行うことができる。これにより、焼逃げ範囲を規格値内に安定的に入れることができる。また、ジャーナル部又はピン部の外径寸法が同じで幅寸法が多少異なるクランクシャフトに対しても上述の可撓体の可撓範囲を適宜に設定することにより、同じ高周波誘導加熱コイル用ガイドチップを併用することも可能である。 In the first aspect of the present invention, the guide chip for the high frequency induction heating coil is fixed to the inside of the pair of flexible bodies provided on the pair of side plates and having a spring function, and the pair of flexible bodies facing each other. A pair of chips arranged and a pair of chip fixing plates fixedly arranged inside the pair of chips, extending to the opening of the side plate in which the journal part or pin part is inserted, and spaced apart By forming a pair of slits facing each other on the side plate, the flexible body is integrally provided on the side plate, and the guide chip for the high frequency induction heating coil is not inserted between the counterweight portions adjacent to each other. In this configuration, a gap is present between the inner surfaces of the pair of chip fixing plates facing each other, and the width dimension between the outer surfaces of the pair of chips facing each other is The width of the journal portion or the pin portion of the shaft is set to be larger, and the guide tips for the high frequency induction heating coil are inserted between the counterweight portions adjacent to each other on the crankshaft, so that the pair of tip fixing plates Since the gap between the inner surfaces is narrowed by the spring function of the pair of flexible bodies or the gap is eliminated, according to the guide chip structure for a high frequency induction heating coil of the present invention, the following An effect can be produced. That is, since the guide chip for the high frequency induction heating coil is made of flexible material (variable width), it is used for the high frequency induction heating coil between the counterweight portions adjacent to each other in the width direction of the journal portion or the pin portion. When the guide chip is inserted, the guide chip for the high frequency induction heating coil having a width dimension larger than the width dimension between the counterweight portions adjacent to each other when the guide chip is in a free state is caused by the spring function of the flexible body of the side plate. The gap between the inner surfaces of the pair of chip fixing plates is elastically deformed so that the pair of chips are inserted and arranged between the counterweight portions adjacent to each other, and are pressed against each counterweight portion. Accordingly, it is possible to always correctly position the guide chip for the high frequency induction heating coil in the width direction of the journal portion or the pin portion between the counterweight portions adjacent to each other. The open saddle type high frequency induction heating coil can always be accurately positioned. Thereby, the burning escape range can be stably within the standard value. Further, the same guide chip for a high frequency induction heating coil can be obtained by appropriately setting the flexible range of the above-mentioned flexible body even for a crankshaft having the same outer diameter dimension or slightly different width dimension of the journal part or the pin part. It is also possible to use together.

また、請求項に記載の本発明は、ジャーナル部又はピン部が挿入配置される側板の開口部にまで延び、かつ、間隔を隔てて互いに対向する一対のスリットを側板に形成することにより、可撓体を側板に一体的に設けるようにしているので、側板とは別体の部材からなる可撓体を設ける必要がなく、従って高周波誘導加熱装置の製作の容易化を図ることができる。 According to the first aspect of the present invention , by forming a pair of slits in the side plate that extend to the opening of the side plate in which the journal portion or the pin portion is inserted and are opposed to each other with a gap therebetween. Since the flexible body is provided integrally with the side plate, there is no need to provide a flexible body made of a member separate from the side plate, and therefore , the manufacture of the high-frequency induction heating device can be facilitated. it can.

また、請求項3に記載の本発明は、高周波誘導加熱コイル用ガイドチップをジャーナル部又はピン部の中心線に対して上方側及び左右両側の3箇所に配置し、これら3個の高周波誘導加熱コイル用ガイドチップが配置される3箇所の全部又は少なくとも1箇所に可撓体を設けるようにしたものであるから、上述の3箇所の全部を可撓にすることにより、ジャーナル部又はピン部の幅方向における高周波誘導加熱コイル用ガイドチップひいては半開放鞍型高周波誘導加熱コイルの位置決めを確実にできることは勿論であるが、少なくとも1箇所を可撓にするだけでも上述の幅方向の位置決めを従来よりも正しく行うことができ、焼逃げ範囲を規格値内に入れることが可能になる。   According to the third aspect of the present invention, the guide tips for the high frequency induction heating coil are arranged at three positions on the upper side and the left and right sides with respect to the center line of the journal portion or the pin portion, and the three high frequency induction heating portions are arranged. Since the flexible body is provided at all or at least one of the three locations where the coil guide tips are arranged, the journal portion or the pin portion of the journal portion or the pin portion is made flexible by making all of the above three locations flexible. Of course, the positioning of the guide chip for the high frequency induction heating coil in the width direction and the positioning of the half-open saddle type high frequency induction heating coil can be ensured, but the above-described positioning in the width direction can be achieved by simply making at least one point flexible. Can be carried out correctly, and it becomes possible to set the range of the burnout within the standard value.

以下、本発明の一実施形態に係る高周波誘導加熱コイル用ガイドチップの構造について図1〜図8を参照して説明する。なお、図1〜図8において、図9〜図12と同様の部分には同一の符号を付して重複する説明を省略する。   Hereinafter, the structure of a guide chip for a high-frequency induction heating coil according to an embodiment of the present invention will be described with reference to FIGS. 1 to 8, the same parts as those in FIGS. 9 to 12 are denoted by the same reference numerals, and redundant description is omitted.

図1は、本発明の一実施形態に係る高周波誘導加熱コイル用ガイドチップの構造を備えた高周波誘導加熱装置20を示すものであって、この高周波誘導加熱装置20は、クランクシャフト1のジャーナル部2を高周波誘導加熱するものである。図1に示すように、高周波誘導加熱装置20は、トランス(図示せず)側にそれぞれ連結されて互いに対向配置される一対の側板7と、これらの側板7の下縁側の開口部に配設されて側板7に支持された半開放鞍型高周波誘導加熱コイル5と、図外の電源から高周波電力を半開放鞍型高周波誘導加熱コイル5に供給する給電用リード導体9と、半開放鞍型高周波誘導加熱コイル5に対応して側板7の所定位置(本実施形態ではクランクシャフト1のジャーナル部2の中心線に対して上側部、並びに、ジャーナル部2の中心線に対して左右両側部の3箇所)に取付けられる3個の高周波誘導加熱コイル用ガイドチップ21a,21b,21c等を具備している。さらに、高周波誘導加熱装置20には、半開放鞍型高周波誘導加熱コイル5にて高周波誘導加熱されたジャーナル部2に焼入処理のために冷却水を噴射する冷却水供給手段10が付設されて高周波誘導焼入装置を構成している。なお、図2は、本実施形態の主要要素である3個の高周波誘導加熱コイル用ガイドチップ21a,21b,21cの構造を示すための側板7の正面図である。   FIG. 1 shows a high-frequency induction heating device 20 having a structure of a guide chip for a high-frequency induction heating coil according to an embodiment of the present invention. The high-frequency induction heating device 20 is a journal part of a crankshaft 1. 2 is subjected to high frequency induction heating. As shown in FIG. 1, the high-frequency induction heating device 20 is disposed in a pair of side plates 7 that are respectively connected to a transformer (not shown) side and arranged to face each other, and an opening on the lower edge side of these side plates 7. A semi-open saddle type high frequency induction heating coil 5 supported by the side plate 7; a power supply lead conductor 9 for supplying high frequency power to the half open saddle type high frequency induction heating coil 5 from a power source not shown; A predetermined position of the side plate 7 corresponding to the high-frequency induction heating coil 5 (in this embodiment, on the upper side with respect to the center line of the journal part 2 of the crankshaft 1 and on the left and right side parts with respect to the center line of the journal part 2). 3 high frequency induction heating coil guide tips 21a, 21b, 21c and the like attached at three locations. Further, the high-frequency induction heating device 20 is provided with a cooling water supply means 10 for injecting cooling water for quenching treatment to the journal portion 2 that has been induction-heated by the semi-open saddle type high-frequency induction heating coil 5. It constitutes an induction hardening apparatus. FIG. 2 is a front view of the side plate 7 showing the structure of the three high frequency induction heating coil guide tips 21a, 21b, and 21c that are the main elements of the present embodiment.

半開放鞍型高周波誘導加熱コイル5を支持する一対の側板7,7の間にそれぞれ取付けられる3個の高周波誘導加熱コイル用ガイドチップ21a,21b,21cは、クランクシャフト1のジャーナル部2を半開放鞍型高周波誘導加熱コイル5により高周波誘導加熱する際に、ジャーナル部2と半開放鞍型高周波誘導加熱コイル5との間に所定の隙間を確保すべく、図外の回転駆動機構によりジャーナル部2の中心線を中心に回転駆動されるジャーナル部2の上側部及び左右両側部にそれぞれ当接配置されるものである。具体的には、図1及び図2に示すように、3個の高周波誘導加熱コイル用ガイドチップ21a,21b,21cのうちの1個のガイドチップ21aは、クランクシャフト1のジャーナル部2の中心線に対して上側部に配置されると共に、その他の2個の高周波誘導加熱コイル用ガイドチップ21b,21cは、ジャーナル部2の中心線に対して左右両側部に配置されている。そして、3個の高周波誘導加熱コイル用ガイドチップ21a,21b,21cがジャーナル部2の外周面に当接されるのに伴って、半開放鞍型高周波誘導加熱コイル5に対するジャーナル部2の中心の位置決めがなされるようになっている。   Three high frequency induction heating coil guide chips 21a, 21b, and 21c, which are respectively attached between the pair of side plates 7 and 7 that support the semi-open saddle type high frequency induction heating coil 5, are configured to halve the journal portion 2 of the crankshaft 1. When high frequency induction heating is performed by the open saddle type high frequency induction heating coil 5, in order to ensure a predetermined gap between the journal part 2 and the half open saddle type high frequency induction heating coil 5, the journal part is provided by a rotary drive mechanism (not shown). The journal portion 2 that is rotationally driven about the center line 2 is disposed in contact with the upper and left and right side portions of the journal portion 2. Specifically, as shown in FIGS. 1 and 2, one guide tip 21 a out of the three high-frequency induction heating coil guide tips 21 a, 21 b, 21 c is the center of the journal portion 2 of the crankshaft 1. The other two high frequency induction heating coil guide tips 21 b and 21 c are arranged on the left and right sides with respect to the center line of the journal portion 2. As the three high frequency induction heating coil guide tips 21 a, 21 b, 21 c are brought into contact with the outer peripheral surface of the journal portion 2, the center of the journal portion 2 with respect to the half-open saddle type high frequency induction heating coil 5 is Positioning is made.

図3(a),(b)は、高周波誘導加熱装置20に用いられている高周波誘導加熱コイル用ガイドチップ21aの詳細構造を示すものであり、図3(b)は高周波誘導加熱コイル用ガイドチップ21aの正面図であり、図3(a)は図3(b)におけるA−A線断面図である。なお、他の高周波誘導加熱コイル用ガイドチップ21b,21cは、高周波誘導加熱コイル用ガイドチップ21aとは配設位置及び配設方向が異なるものの、その構造は実質的に同一なので、それらの構造の説明を省略する。   3A and 3B show the detailed structure of the guide chip 21a for the high-frequency induction heating coil used in the high-frequency induction heating device 20, and FIG. 3B shows the guide for the high-frequency induction heating coil. It is a front view of the chip | tip 21a, Fig.3 (a) is the sectional view on the AA line in FIG.3 (b). The other high-frequency induction heating coil guide tips 21b and 21c differ from the high-frequency induction heating coil guide tip 21a in the arrangement position and direction, but the structure is substantially the same. Description is omitted.

図2に示すように、クランクシャフト1のジャーナル部2が挿入配置される半円弧状開口部22が側板7,7の下部に形成されており、図3(a),(b)に示すような構造の高周波誘導加熱コイル用ガイドチップ21a,21b,21cの先端部が上述の半円弧状開口部22に突出した状態で側板7,7の半円弧状開口部22の上側部及び左右両側部(すなわち、ジャーナル部2の中心線に対して上側の箇所及びその中心線に対して左右の両側箇所)に配設されている。さらに具体的に述べると、側板7,7の半円弧状開口部22の上側部には、この半円弧状開口部22から上方に延びる互いに平行な一対のスリット23,23がそれぞれ形成されてこれら一対のスリット23,23の間の部分(ばね機能を有する片持ち支持の板状体)が可撓体24aとして設けられると共に、側板7,7の半円弧状開口部22の左右両側部には、半円弧状開口部22から左右両側にそれぞれ延びる各1つのスリット25,26が形成されてこれらのスリット25,26にそれぞれ隣接する側板部分が可撓体24b,24cとして設けられている。そして、上述の側板7,7の可撓体24a,24aの間に高周波誘導加熱コイル用ガイドチップ21aが取付けられると共に、側板7,7の可撓体24b,24bの間及び可撓体24c,24cの間に高周波誘導加熱コイル用ガイドチップ21b,21cがそれぞれ取付けられている。従って、本実施形態では3個の高周波誘導加熱コイル用ガイドチップ21a,21b,21cの全てが可撓に構成されている。なお、図1において27,27は補助側板であり、側板7,7には1つのスリット25,26しか設けられていないが(図2参照)、この構造に限定されるものではく、既述のスリット23,23の場合のように側板7,7の2つの平行なスリットを設けて可撓体24,24cを挟むような構造にしてもよい。 As shown in FIG. 2, a semicircular opening 22 into which the journal portion 2 of the crankshaft 1 is inserted is formed in the lower part of the side plates 7 and 7, as shown in FIGS. 3 (a) and 3 (b). Of the high-frequency induction heating coil guide chip 21a, 21b, 21c having a simple structure projecting into the semicircular arc opening 22 described above, the upper side and the left and right side parts of the semicircular arc opening 22 of the side plates 7, 7. (In other words, it is disposed at a location on the upper side with respect to the center line of the journal portion 2 and on both the left and right sides with respect to the center line). More specifically, a pair of parallel slits 23 and 23 extending upward from the semicircular arc opening 22 are formed on the upper side of the semicircular arc opening 22 of the side plates 7 and 7, respectively. A portion between the pair of slits 23, 23 (a cantilever plate having a spring function) is provided as a flexible body 24a, and on the left and right side portions of the semicircular arc opening 22 of the side plates 7, 7. Each of the slits 25 and 26 extending from the semicircular arc opening 22 to the left and right sides is formed, and side plate portions adjacent to the slits 25 and 26 are provided as flexible bodies 24b and 24c, respectively. And the guide chip 21a for high frequency induction heating coils is attached between the flexible bodies 24a, 24a of the side plates 7, 7, and between the flexible bodies 24b, 24b of the side plates 7, 7, and the flexible bodies 24c, Between 24c, high frequency induction heating coil guide tips 21b and 21c are respectively attached. Accordingly, in the present embodiment, all of the three high frequency induction heating coil guide tips 21a, 21b, and 21c are configured to be flexible. In FIG. 1, reference numerals 27 and 27 denote auxiliary side plates, and the side plates 7 and 7 are provided with only one slit 25 and 26 (see FIG. 2). As in the case of the slits 23, 23, two parallel slits of the side plates 7, 7 may be provided to sandwich the flexible bodies 24 b , 24 c .

一方、高周波誘導加熱コイル用ガイドチップ21aは、図1〜図4に示すように、スリット23,23により可撓状態となされる相対向する一対の可撓体(可撓板)24a,24aと、それぞれの可撓体24a,24aの内面に密接して固定されかつその先端側が可撓体24a,24aから膨出して可撓体24a,24aの外面よりはみ出して配置されるチップ29a,29aと、これらのチップ29a,29aの内面にそれぞれ密接して固定されるチップ固定板30a,30a等とから構成され、可撓体24a,24aとチップ29a,29aとチップ固定板30a,30の固定は、互いに対向する箇所において各一対のビス31a,31aによりそれぞれ別々に行われるようになっている。なお、側板7及び可撓体24aはばね用銅合金(本実施形態では燐青銅,ベリリウム銅など)からなり、チップ固定板30aは主に真鍮材からなり、チップ29aはセラミックからなるが、これに限定されるものではない。 On the other hand, as shown in FIGS. 1 to 4, the high frequency induction heating coil guide chip 21a includes a pair of opposing flexible bodies (flexible plates) 24a and 24a that are made flexible by the slits 23 and 23. Chips 29a, 29a, which are fixed in close contact with the inner surfaces of the respective flexible bodies 24a, 24a and whose distal end bulges from the flexible bodies 24a, 24a and protrudes from the outer surfaces of the flexible bodies 24a, 24a; these chips 29a, chip fixing plate 30a which is closely fixed to the inner surface of 29a, is composed of a 30a or the like, flexible body 24a, a 24a and the chip 29a, 29a and the chip fixing plate 30a, 30 a fixed Are separately performed by a pair of screws 31a and 31a at locations facing each other. The side plate 7 and the flexible body 24a are made of spring copper alloy (in this embodiment, phosphor bronze, beryllium copper, etc.), the chip fixing plate 30a is mainly made of brass material, and the chip 29a is made of ceramic. It is not limited to.

また、図3(a)に示すように、高周波誘導加熱コイル用ガイドチップ21aにあっては、互いに隣り合うカウンタウエイト部3,3の間に挿入されない自由状態において、チップ固定板30a,30aの内面の間に隙間32が形成されている。可撓体24aは、図3(a),(b)において符号Pで示す箇所を支点として上述の隙間32を狭める方向に可撓であり、従って可撓体24a,24aとこれらの可撓体24a,24aにビス31a,31aでそれぞれ別々に固定されるチップ29a,29a及びチップ固定板30a,30aは、前記符号Pで示す箇所を支点として可撓であり、可撓体24a,24aの弾性により弾性変形し得るように構成されている。なお、図3(a)に示すように、高周波誘導加熱コイル用ガイドチップ21aが自由状態にあるときは、チップ29a,29aの外面の間の幅寸法W1(図3(a)及び図4(a)参照)が、クランクシャフト1のジャーナル部2の幅寸法L2(図4(a),(b)、図9参照)よりも大きく設定されている。この場合、上述の自由状態の下での隙間32の幅をW2(図3(a)及び図4(a)参照)とすると、(W1−L2)≦W2となるように設定されている。 Further, as shown in FIG. 3A, in the high frequency induction heating coil guide chip 21a, the chip fixing plates 30a, 30a are not inserted between the counterweight parts 3, 3 adjacent to each other. A gap 32 is formed between the inner surfaces. The flexible body 24a is flexible in a direction in which the gap 32 is narrowed with a position indicated by reference numeral P in FIGS. 3A and 3B as a fulcrum, and therefore, the flexible bodies 24a and 24a and these flexible bodies. The chips 29a and 29a and the chip fixing plates 30a and 30a, which are separately fixed to the screws 24a and 24a by the screws 31a and 31a, are flexible with the position indicated by the reference symbol P as a fulcrum, and the elastic bodies 24a and 24a are elastic. It can be elastically deformed. As shown in FIG. 3A, when the high-frequency induction heating coil guide tip 21a is in a free state, the width dimension W 1 between the outer surfaces of the tips 29a and 29a (FIG. 3A and FIG. 4). (See (a)) is set to be larger than the width L 2 of the journal portion 2 of the crankshaft 1 (see FIGS. 4A, 4B, and 9). In this case, if the width of the gap 32 under the above-mentioned free state is W 2 (see FIGS. 3A and 4A), the setting is made so that (W 1 −L 2 ) ≦ W 2. Has been.

一方、クランクシャフト1のピン部4を高周波誘導加熱する場合に用いられる高周波誘導加熱コイル用ガイドチップの構造も上述の高周波誘導加熱コイル用ガイドチップ21aと同様であるので、その説明を省略する。勿論、クランクシャフト1のピン部4に対しては、高周波誘導加熱コイル用ガイドチップの一対のチップの外面の間の幅寸法(図示省略)は、ピン部4の両側のカウンタウエイト部3,3の間の幅L3(図9参照)よりも大きく設定される。 On the other hand, the structure of the guide tip for the high frequency induction heating coil used when the pin portion 4 of the crankshaft 1 is subjected to high frequency induction heating is the same as that of the above-described guide tip 21a for the high frequency induction heating coil, and the description thereof will be omitted. Of course, with respect to the pin portion 4 of the crankshaft 1, the width dimension (not shown) between the outer surfaces of the pair of tips of the high frequency induction heating coil guide tip is determined by the counterweight portions 3 and 3 on both sides of the pin portion 4. Is set larger than the width L 3 (see FIG. 9).

次に、高周波誘導加熱コイル用ガイドチップ21a,21b,21cを備えた高周波誘導加熱装置20によりクランクシャフト1のジャーナル部2を高周波誘導加熱して焼入処理する際の動作を説明する。まず、クランクシャフト1のジャーナル部2を高周波誘導加熱するに当たっては、側板7の半円弧状開口部22内にジャーナル部2が配置されるように図外の昇降機構により高周波誘導加熱装置20を下降移動させ、高周波誘導加熱コイル用ガイドチップ21a,21b,21cの先端部(例えば、一対のチップ29a,29aの先端部)をクランクシャフト1のカウンタウエイト部3,3の間に挿入してジャーナル部2の外周面に当接させた状態にする。この際、既述の如く自由状態における高周波誘導加熱コイル用ガイドチップ21a,21b,21cの幅寸法W1はジャーナル部2のカウンタウエイト部3,3の間の幅寸法L2よりも大きく設定されている(W1>L2)ので(図4(a)参照)、可撓体24a,24a等が符号P(図3(a),(b)参照)で示す箇所を支点として弾性変形し、図4(b)に示す如く各ガイドチップ21a,21b,21cの隙間32が自由状態の下での隙間32の幅W2よりも狭められて幅W3となる。この場合、可撓体24aが弾性変形して隙間32が狭くなるため、高周波誘導加熱コイル用ガイドチップ21a,21b,21cの各一対のチップ29a,29a等は、各一対の可撓体24a,24a等の弾性復元力(幅W3が広がる方向の弾性力)によりジャーナル部2の両側のカウンタウエイト部3,3の内面に圧接され、その結果、高周波誘導加熱コイル用ガイドチップ21a,21b,21cひいては半開放鞍型高周波誘導加熱コイル5がジャーナル部2の幅方向に対して正しい位置に位置決めされることとなる。すなわち、互いに隣り合うカウンタウエイト部3,3の間のジャーナル部2の幅方向において半開放鞍型高周波誘導加熱コイル5がその幅方向の中央位置に位置決めされることとなる。 Next, the operation when the journal part 2 of the crankshaft 1 is induction-heated by the high-frequency induction heating device 20 including the high-frequency induction heating coil guide tips 21a, 21b, 21c will be described. First, in high frequency induction heating of the journal portion 2 of the crankshaft 1, the high frequency induction heating device 20 is lowered by an elevating mechanism (not shown) so that the journal portion 2 is disposed in the semicircular opening 22 of the side plate 7. The journal portion is inserted by inserting the tip portions of the high frequency induction heating coil guide tips 21a, 21b, 21c (for example, the tip portions of the pair of tips 29a, 29a) between the counterweight portions 3, 3 of the crankshaft 1. 2 is brought into contact with the outer peripheral surface. At this time, as described above, the width dimension W 1 of the guide chips 21a, 21b, 21c for the high frequency induction heating coil in the free state is set to be larger than the width dimension L 2 between the counterweight parts 3, 3 of the journal part 2. (W 1 > L 2 ) (see FIG. 4 (a)), the flexible bodies 24a, 24a, etc. are elastically deformed with the point indicated by the symbol P (see FIGS. 3 (a), (b)) as a fulcrum. , the 4 respective guide tip 21a as shown in (b), 21b, the width W 3 is narrower than the width W 2 of the gap 32 under clearance 32 is in a free state of the 21c. In this case, since the flexible body 24a is elastically deformed and the gap 32 is narrowed, the pair of chips 29a, 29a, etc. of the high-frequency induction heating coil guide chips 21a, 21b, 21c are connected to the pair of flexible bodies 24a, are pressed by the elastic restoring force such as 24a (elastic force in the direction in which the width W 3 extends) to the inner surface of both sides of the counterweight portions 3 and 3 of the journal portion 2, as a result, the guide for the high-frequency induction heating coil tip 21a, 21b, Thus, 21c and the half-open saddle type high frequency induction heating coil 5 are positioned at the correct position in the width direction of the journal portion 2. That is, the half-open saddle type high frequency induction heating coil 5 is positioned at the center position in the width direction in the width direction of the journal portion 2 between the counterweight portions 3 and 3 adjacent to each other.

このような状態の下で、クランクシャフト1はその軸線(ジャーナル部2の中心線)を中心に図外の回転駆動機構により回転駆動されると共に、図外の高周波誘導加熱コイル追従機構により高周波誘導加熱装置20ひいてはガイドチップ21a,21b,21c及び半開放鞍型高周波誘導加熱コイル5が回転状態のジャーナル部2に追従するように保持され、半開放鞍型高周波誘導加熱コイル5にてジャーナル部2が高周波誘導加熱される。しかる後に、所要の焼入温度に高周波誘導加熱されたジャーナル部2に冷却水供給手段10から冷却水を噴射することにより焼入処理が行われて焼入硬化層が形成される。   Under such a state, the crankshaft 1 is rotationally driven by a rotation driving mechanism (not shown) around its axis (center line of the journal portion 2), and also high-frequency induction by a high-frequency induction heating coil tracking mechanism (not shown). The heating device 20 and thus the guide tips 21a, 21b, 21c and the semi-open saddle type high frequency induction heating coil 5 are held so as to follow the journal portion 2 in the rotating state. Is heated by high frequency induction. Thereafter, a quenching process is performed by injecting cooling water from the cooling water supply means 10 onto the journal portion 2 that has been induction-heated to a required quenching temperature to form a quench hardened layer.

図5は、ジャーナル部2の油孔34が無い部分35を上述の高周波誘導加熱コイル用ガイドチップ21a,21b,21cを用いて高周波誘導加熱して焼入処理した場合に形成される焼入硬化層S3を示し、図6は、ジャーナル部2の油孔36が有る部分37を上述の高周波誘導加熱コイル用ガイドチップ21a,21b,21cを用いて高周波誘導加熱して焼入処理した場合に形成される焼入硬化層S4を示している。そして、図7は、図5に示す部分35における焼逃げ範囲を示し、図8は、図6に示す部分37における焼逃げ範囲を示している。なお、図7及び図8においては、横軸を焼入部位とし、縦軸を焼逃げ範囲としており、焼逃げ範囲の規格値は3.0〜4.5mmである。また、図7及び図8において、□は従来の高周波誘導加熱コイル用ガイドチップ8a,8b,8c(図12参照)を用いた場合、◇及び○は本実施形態の高周波誘導加熱コイル用ガイドチップ21a,21b,21cを用いた場合ものであり、◇は可撓体24a,24a等のばね定数が低いもの(ばね定数=5.9kg/mm)、○は可撓体24a,24a等のばね定数が高いもの(ばね定数=7.8kg/mm)を示す。ここで、□,◇,○が記載れている点が、測定された焼逃げ範囲の平均値であり、これらから上方へ延びる直線の上端が焼逃げ範囲の最高測定値であり、これらから下方へ延びる直線の下端が焼逃げ範囲の最低測定値である。一方、焼入部位は、図9に示すクランクシャフト1の左から2番目のジャーナル部2(2J)と、図9に示すクランクシャフト1の左から4番目のジャーナル部2(4J)である。なお、2番目のジャーナル部2(2J)の直径は76.8mmであってその幅は24.0mmであり、4番目のジャーナル部2(4J)の直径は76.8mmであってその幅は23.5mmであり、従って、4番目のジャーナル部2(4J)は2番目のジャーナル部2(2J)よりも幅寸法がやや狭いもの(−0.5mm)である。 FIG. 5 shows the quench hardening formed when the portion 35 of the journal portion 2 without the oil holes 34 is subjected to high frequency induction heating using the above-described high frequency induction heating coil guide tips 21a, 21b, and 21c and subjected to quenching treatment. shows the layer S 3, 6, a part 37 of the oil hole 36 of the journal portion 2 there is high frequency induction heating coil guide tip 21a described above, 21b, when quenching treatment by high-frequency induction heating using 21c It shows the hardened layer S 4 to be formed. 7 shows the burn-out range in the portion 35 shown in FIG. 5, and FIG. 8 shows the burn-out range in the portion 37 shown in FIG. In FIGS. 7 and 8, the horizontal axis is the quenching site, the vertical axis is the burnout range, and the standard value of the burnout range is 3.0 to 4.5 mm. In FIGS. 7 and 8, when □ is a conventional high frequency induction heating coil guide tip 8a, 8b, 8c (see FIG. 12), ◇ and ○ are high frequency induction heating coil guide tips of the present embodiment. 21a, 21b, are those in the case of using 21c, ◇ those flexible body 24a, the spring constant of 24a such low (spring constant = 5.9kg / mm), ○ is flexible body 24a, a 24a such Those having a high spring constant (spring constant = 7.8 kg / mm) are shown. Here, the points marked with □, ◇, ○ are the average values of the measured flank range, and the upper end of the straight line extending upward from these is the highest measured value of the flank range, and below this The lower end of the straight line extending to the bottom is the lowest measured value of the burnout range. On the other hand, the quenching sites are the second journal portion 2 (2J) from the left of the crankshaft 1 shown in FIG. 9 and the fourth journal portion 2 (4J) from the left of the crankshaft 1 shown in FIG. The diameter of the second journal part 2 (2J) is 76.8 mm and its width is 24.0 mm, and the diameter of the fourth journal part 2 (4J) is 76.8 mm and its width is Therefore, the fourth journal portion 2 (4J) is slightly narrower (−0.5 mm) than the second journal portion 2 (2J).

図7に示すように、従来の高周波誘導加熱コイル用ガイドチップ8a,8b,8cを用いた場合には、2番目のジャーナル部2(2J)については下限値を超えており、4番目のジャーナル部2(4J)については規定値にぎりぎり入っているのに対し、本実施形態の高周波誘導加熱コイル用ガイドチップ21a,21b,21cを用いた場合には、十分に規格値内に入っていることがわかる。また、ジャーナル部2の油孔36の有る部分37においては焼逃げ範囲のバラツキが比較的大きく生じる傾向にあるが、図8からは、ジャーナル部2の油孔36の有る部分37に対しても本実施形態の高周波誘導加熱コイル用ガイドチップ21a,21b,21cを用いた場合には「焼逃げ範囲」が規格値内に十分に入っていることがわかる。   As shown in FIG. 7, when the conventional high frequency induction heating coil guide tips 8a, 8b, 8c are used, the second journal portion 2 (2J) exceeds the lower limit value, and the fourth journal The portion 2 (4J) is within the specified value, but when the high-frequency induction heating coil guide tips 21a, 21b, and 21c of the present embodiment are used, they are sufficiently within the standard value. I understand that. Further, in the portion 37 where the oil hole 36 of the journal portion 2 is present, there is a tendency that the variation in the burnout range is relatively large, but from FIG. It can be seen that when the high-frequency induction heating coil guide tips 21a, 21b, and 21c of the present embodiment are used, the “burn-out range” is sufficiently within the standard value.

なお、図5及び図6は、上述の如く、本実施形態の高周波誘導加熱コイル用ガイドチップ21a,21b,21cを用いた場合に形成される焼入硬化層S3,S4を示すものであるが、ジャーナル部2の油孔34の無い部分35、並びに、ジャーナル部2の油孔36の有る部分37の何れにもほぼ正しい位置に焼入硬化層S3,S4が形成されていることが確認された。 5 and 6 show the hardened and hardened layers S 3 and S 4 formed when the high-frequency induction heating coil guide tips 21a, 21b, and 21c of this embodiment are used as described above. However, the hardened and hardened layers S 3 and S 4 are formed at almost correct positions in both the portion 35 of the journal portion 2 having no oil holes 34 and the portion 37 of the journal portion 2 having the oil holes 36. It was confirmed.

以上、本発明の一実施形態について述べたが、本発明はこの実施形態に限定されるものではなく、本発明の技術的思想に基づいて各種の変形及び変更が可能である。例えば、既述の実施形態ではクランクシャフト1のジャーナル部2を高周波誘導加熱コイル用ガイドチップ21a,21b,21cを用いて高周波誘導加熱して焼入処理するようにしたが、クランクシャフト1のピン部4を高周波誘導加熱コイル用ガイドチップ21a,21b,21cを用いて高周波誘導加熱して焼入処理する場合にも本発明を適用し得る。また、既述の実施形態では3個の高周波誘導加熱コイル用ガイドチップ21a,21b,21cを可撓式に構成したが、これらのうちの1つのみを可撓式に構成するようにしてもよい。この場合にも、ジャーナル部又はピン部の幅方向における高周波誘導加熱コイル用ガイドチップひいては半開放鞍型高周波誘導加熱コイルの位置決めを正しく行うことができる。また、既述の実施形態では3個の高周波誘導加熱コイル用ガイドチップ21a,21b,21cを用いるようにしたが、2個又は4個以上の高周波誘導加熱コイル用ガイドチップを用いることが可能である。また、既述の実施形態においては、互いに隣り合うカウンタウエイト部3,3の間に高周波誘導加熱コイル用ガイドチップ21a,21b,21cを挿入したときに、互いに対向するチップ固定板30a,30aの間の隙間32が狭められて幅W3となるように設定したが(図4(b)参照))、この隙間32がゼロになる(隙間32が存在しなくなる)ように設定しても良い。以上において、本発明の高周波誘導加熱コイル用ガイドチップの構造について説明したが、このガイドチップ構造は前記のものに限定するものではなく、同一技術的範疇のものが適用されることは勿論である。 Although one embodiment of the present invention has been described above, the present invention is not limited to this embodiment, and various modifications and changes can be made based on the technical idea of the present invention. For example, in the embodiment described above, the journal portion 2 of the crankshaft 1 is subjected to quenching treatment by high-frequency induction heating using the high-frequency induction heating coil guide tips 21a, 21b, and 21c. The present invention can also be applied to the case where the portion 4 is subjected to quenching treatment by high-frequency induction heating using the high-frequency induction heating coil guide tips 21a, 21b, and 21c. In the embodiment described above, the three high-frequency induction heating coil guide tips 21a, 21b, and 21c are configured to be flexible. However, only one of them may be configured to be flexible. Good. Also in this case, it is possible to correctly position the guide chip for the high-frequency induction heating coil and thus the half-open saddle type high-frequency induction heating coil in the width direction of the journal part or the pin part. In the above-described embodiment, three high frequency induction heating coil guide tips 21a, 21b, and 21c are used. However, two or four or more high frequency induction heating coil guide tips can be used. is there. Further, in the above-described embodiment, when the high frequency induction heating coil guide chips 21a, 21b, 21c are inserted between the counterweight portions 3, 3 adjacent to each other, the chip fixing plates 30a, 30a facing each other are arranged. The gap 32 is narrowed to the width W 3 (see FIG. 4B)), but the gap 32 may be set to zero (the gap 32 does not exist). . In the above, the structure of the guide chip for a high frequency induction heating coil according to the present invention has been described. However, this guide chip structure is not limited to the above-mentioned structure, and of course the same technical category is applied. .

本発明の一実施形態に係る高周波誘導加熱コイル用ガイドチップの構造を備えた高周波誘導加熱装置を示す正面図である。It is a front view which shows the high frequency induction heating apparatus provided with the structure of the guide chip for high frequency induction heating coils which concerns on one Embodiment of this invention. 図1の高周波誘導加熱装置の側板に高周波誘導加熱コイル用ガイドチップを取付けた状態を示す側板の正面図である。It is a front view of the side plate which shows the state which attached the guide chip for high frequency induction heating coils to the side plate of the high frequency induction heating apparatus of FIG. 本発明に係る高周波誘導加熱コイル用ガイドチップの構造を示すものであって、図3(a)は図3(b)におけるA−A断面図である高周波誘導加熱コイル用ガイドチップの断面図、図3(b)は側板への高周波誘導加熱コイル用ガイドチップの取付箇所の側面図である。3 shows the structure of a guide chip for a high-frequency induction heating coil according to the present invention, and FIG. 3A is a cross-sectional view of the guide chip for a high-frequency induction heating coil, which is a cross-sectional view taken along line AA in FIG. FIG.3 (b) is a side view of the attachment location of the guide chip for high frequency induction heating coils to a side plate. 高周波誘導加熱コイル用ガイドチップとクランクシャフトのジャーナル部及びカウンタウエイト部との関係を示すものであって、図4(a)は自由状態の高周波誘導加熱コイル用ガイドチップを示す断面図、図4(b)は高周波誘導加熱コイル用ガイドチップが互いに隣り合うカウンタウエイト部の間に挿入配置された状態を示す断面図である。FIG. 4A shows the relationship between the guide tip for a high-frequency induction heating coil and the journal portion and counterweight portion of the crankshaft, and FIG. 4A is a sectional view showing the guide tip for the high-frequency induction heating coil in a free state. (B) is sectional drawing which shows the state by which the guide tip for high frequency induction heating coils was inserted and arrange | positioned between the counterweight parts adjacent to each other. 本実施形態の高周波誘導加熱コイル用ガイドチップを用いてジャーナル部の油孔の無い部分に焼入硬化層を形成した状態を示す断面図である。It is sectional drawing which shows the state which formed the hardening hardening layer in the part without an oil hole of a journal part using the guide chip for high frequency induction heating coils of this embodiment. 本実施形態の高周波誘導加熱コイル用ガイドチップを用いてジャーナル部の油孔の有る部分に焼入硬化層を形成した状態を示す断面図である。It is sectional drawing which shows the state which formed the hardening hardening layer in the part with the oil hole of a journal part using the guide chip for high frequency induction heating coils of this embodiment. 本実施形態及び従来の高周波誘導加熱コイル用ガイドチップを用いてジャーナル部の油孔の無い部分における焼逃げ範囲を示すグラフである。It is a graph which shows the burning escape range in the part without an oil hole of a journal part using this embodiment and the conventional high frequency induction heating coil guide tip. 本実施形態及び従来の高周波誘導加熱コイル用ガイドチップを用いてジャーナル部の油孔の有る部分における焼逃げ範囲を示すグラフである。It is a graph which shows the burning range in the part with an oil hole of a journal part using this embodiment and the conventional high frequency induction heating coil guide tip. クランクシャフトの側面図である。It is a side view of a crankshaft. 従来構造の高周波誘導加熱コイル用ガイドチップを有する高周波誘導加熱装置の主要部を示す側面図である。It is a side view which shows the principal part of the high frequency induction heating apparatus which has a guide chip for high frequency induction heating coils of the conventional structure. 従来の高周波誘導加熱コイル用ガイドチップの構造を示すものであり、図11(a)は高周波誘導加熱コイル用ガイドチップの断面図であって、11(b)におけるB−B線断面図、図11(b)は高周波誘導加熱コイル用ガイドチップの側面図である。FIG. 11A shows a structure of a conventional guide chip for a high-frequency induction heating coil, and FIG. 11A is a cross-sectional view of the guide chip for a high-frequency induction heating coil, and is a cross-sectional view taken along line BB in FIG. 11 (b) is a side view of the guide chip for the high frequency induction heating coil. 従来構造の高周波誘導加熱コイル用ガイドチップを用いたクランクシャフトのジャーナル部の焼入方法を示す断面図であり、図12(a)はフラット焼入の状況を示す断面図、図12(b)はフラット焼入によりジャーナル部に形成された焼入硬化層を示す断面図、図12(c)はフィレットR焼入の状況を示す断面図、図12(d)はフィレットR焼入によりジャーナル部に形成された焼入硬化層を示す断面図である。It is sectional drawing which shows the quenching method of the journal part of the crankshaft using the guide chip for high frequency induction heating coils of the conventional structure, Fig.12 (a) is sectional drawing which shows the condition of flat quenching, FIG.12 (b) Is a cross-sectional view showing a hardened hardened layer formed in the journal part by flat quenching, FIG. 12C is a cross-sectional view showing the state of fillet R quenching, and FIG. 12D is a journal part by fillet R quenching. It is sectional drawing which shows the hardening hardening layer formed in.

符号の説明Explanation of symbols

1 クランクシャフト
2 ジャーナル部
3 カウンタウエイト部
4 ピン部
5 半開放鞍型高周波誘導加熱コイル
7 側板
20 高周波誘導加熱装置
21a,21b,21c 高周波誘導加熱コイル用ガイドチップ
22 半円弧状開口部
23 スリット
24a,24b,24c 可撓体
25,26 スリット
29a チップ
30a チップ固定板
31a ビス
32 隙間
DESCRIPTION OF SYMBOLS 1 Crankshaft 2 Journal part 3 Counterweight part 4 Pin part 5 Half open saddle type high frequency induction heating coil 7 Side plate 20 High frequency induction heating apparatus 21a, 21b, 21c Guide chip for high frequency induction heating coil 22 Semicircular arc opening 23 Slit 24a , 24b, 24c Flexible body 25, 26 Slit 29a Chip 30a Chip fixing plate 31a Screw 32 Gap

Claims (2)

半開放鞍型高周波誘導加熱コイルを支持する一対の側板の間にそれぞれ取付けられた複数個の高周波誘導加熱コイル用ガイドチップであって、クランクシャフトのジャーナル部又はピン部を前記半開放鞍型高周波誘導加熱コイルにより高周波誘導加熱する際に、前記半開放鞍型高周波誘導加熱コイルに対する前記ジャーナル部又はピン部の中心の位置決め、並びに、前記クランクシャフトの互いに隣り合うカウンタウエイト部の間の前記ジャーナル部又はピン部の幅方向における前記半開放鞍型高周波誘導加熱コイルの位置決めを行うための高周波誘導加熱コイル用ガイドチップの構造において、
前記高周波誘導加熱コイル用ガイドチップは、前記一対の側板にそれぞれ設けられたばね機能を有する一対の可撓体と、互いに対向する前記一対の可撓体の内側にそれぞれ固定配置された一対のチップと、前記一対のチップの内側にそれぞれ固定配置された一対のチップ固定板とを備え、
前記ジャーナル部又はピン部が挿入配置される前記側板の開口部にまで延び、かつ、間隔を隔てて互いに対向する一対のスリットを前記側板に形成することにより、前記可撓体を前記側板に一体的に設け、
前記高周波誘導加熱コイル用ガイドチップが互いに隣り合う前記カウンタウエイト部の間に挿入されない自由状態の下では、互いに対向する前記一対のチップ固定板の内面の間に隙間が存在するように構成すると共に、互いに対向する前記一対のチップの外面間の幅寸法が前記ジャーナル部又はピン部の幅寸法よりも大きく設定し、
前記高周波誘導加熱コイル用ガイドチップが互いに隣り合う前記カウンタウエイト部の間に挿入されるのに伴って、前記一対のチップ固定板の内面の間の前記隙間が前記一対の可撓体のばね機能により狭められ、或いは前記隙間がなくなるように構成したこと、
を特徴とする高周波誘導加熱コイル用ガイドチップの構造。
A plurality of high frequency induction heating coil guide chips each mounted between a pair of side plates supporting a half open saddle type high frequency induction heating coil, wherein the journal portion or pin portion of the crankshaft is connected to the half open saddle type high frequency induction coil When high-frequency induction heating is performed by a heating coil, positioning of the center of the journal part or the pin part with respect to the semi-open saddle type high-frequency induction heating coil, and the journal part between adjacent counterweight parts of the crankshaft or In the structure of the guide chip for the high frequency induction heating coil for positioning the semi-open saddle type high frequency induction heating coil in the width direction of the pin portion,
The high frequency induction heating coil guide chip includes a pair of flexible bodies each having a spring function provided on the pair of side plates, and a pair of chips fixedly disposed inside the pair of flexible bodies facing each other. A pair of chip fixing plates fixedly arranged inside the pair of chips,
The flexible body is integrated with the side plate by forming a pair of slits in the side plate that extend to the opening of the side plate where the journal portion or the pin portion is inserted and are opposed to each other with a gap therebetween. Provided,
In a free state where the guide chip for the high frequency induction heating coil is not inserted between the counterweight portions adjacent to each other, a gap is formed between the inner surfaces of the pair of chip fixing plates facing each other. The width dimension between the outer surfaces of the pair of chips facing each other is set larger than the width dimension of the journal part or the pin part,
As the guide chip for the high frequency induction heating coil is inserted between the counterweight portions adjacent to each other, the gap between the inner surfaces of the pair of chip fixing plates serves as a spring function of the pair of flexible bodies. It was narrowed by or configured to eliminate the gap,
The structure of a guide tip for a high-frequency induction heating coil characterized by
前記高周波誘導加熱コイル用ガイドチップを前記ジャーナル部又はピン部の中心線に対して上方側及び左右両側の3箇所に配置し、これら3個の高周波誘導加熱コイル用ガイドチップが配置される3箇所の全部又は少なくとも1箇所に前記可撓体を設けたことを特徴とする請求項1に記載の高周波誘導加熱コイル用ガイドチップの構造。 The high-frequency induction heating coil guide tips are arranged at three locations on the upper side and the left and right sides with respect to the center line of the journal portion or the pin portion, and three locations where these three high-frequency induction heating coil guide tips are arranged. structure of the guide chip for high frequency induction heating coil of claim 1, wherein all or at least one location to the provision of the flexible member.
JP2007099368A 2007-04-05 2007-04-05 Guide tip structure for high frequency induction heating coil Active JP4405526B2 (en)

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