JPH1161241A - Method and device for high frequency hardening - Google Patents
Method and device for high frequency hardeningInfo
- Publication number
- JPH1161241A JPH1161241A JP9237734A JP23773497A JPH1161241A JP H1161241 A JPH1161241 A JP H1161241A JP 9237734 A JP9237734 A JP 9237734A JP 23773497 A JP23773497 A JP 23773497A JP H1161241 A JPH1161241 A JP H1161241A
- Authority
- JP
- Japan
- Prior art keywords
- frequency
- heating
- heating coil
- cooling
- induction hardening
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Landscapes
- Heat Treatment Of Articles (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、例えばはすば歯車
やベベル歯車等の軸芯に対して斜めになった凹凸が形成
されたワークの前記凹凸に高周波焼入を施す高周波焼入
装置と方法とに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an induction hardening apparatus for performing an induction hardening process on an uneven surface of a work having an uneven surface inclined with respect to the axis of a helical gear or a bevel gear. And how to.
【０００２】[0002]
【従来の技術】例えば、はすば歯車の周面に形成された
凹凸である歯部に高周波輪郭焼入を施す高周波焼入装置
は、はすば歯車の周面に所定の間隔を空けて設置される
リング状の高周波加熱コイルと、この高周波加熱コイル
での超短時間の加熱が終了した後に加熱された周面に冷
却液にて冷却する冷却手段とを有している。2. Description of the Related Art For example, an induction hardening apparatus for performing high-frequency contour hardening on a tooth portion, which is an uneven surface formed on the peripheral surface of a helical gear, is provided at a predetermined interval on the peripheral surface of the helical gear. It has a ring-shaped high-frequency heating coil to be installed, and cooling means for cooling the heated peripheral surface with a coolant after the ultra-short-time heating by the high-frequency heating coil is completed.
【０００３】かかる高周波輪郭焼入装置では、高周波加
熱コイルによるワークの加熱が完了するやいなや冷却液
にワークを浸漬するか冷却液をワークに噴射することで
冷却している。In such a high-frequency contour hardening apparatus, as soon as heating of the work by the high-frequency heating coil is completed, the work is cooled by immersing the work in a coolant or by spraying the coolant onto the work.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、従来の
高周波輪郭焼入装置には以下のような問題点がある。す
なわち、図５及び図６に示すように、はすば歯車Ｗの歯
部Ｗ1 の側面の端部Ｗ2 に高周波焼入による硬化層Ｗ4
が形成されないことがあるのである。これは、高周波加
熱コイルに高周波電流を通電させたことにより、ワーク
であるはすば歯車Ｗの表面に発生した誘導電流がはすば
歯車Ｗの端面の凹凸である歯部Ｗ1 に沿って均等に流れ
ないことに起因する。はすば歯車Ｗは、その凹凸である
歯部Ｗ1 が軸芯Ｗ5 に対して斜めになっていて、しかも
電流密度が高く短時間での加熱であるため、歯部Ｗ1 の
歯すじＷ3 とはすば歯車Ｗの端面とがなす角度が鈍角に
なった側の側面の端部Ｗ2 には誘導電流は流れないので
ある。このため、この端部Ｗ2 は加熱されないので、加
熱終了後すぐに冷却したとしても硬化層が形成されない
のである。このような硬化層が形成されない部分がある
と、噛み合う相手側の歯車がこの部分に噛み合うとピッ
チング等を起こしやすい。However, the conventional high frequency contour hardening apparatus has the following problems. That is, as shown in FIGS. 5 and 6, a hardened layer W 4 formed by induction hardening is applied to an end W 2 of the side surface of the tooth W 1 of the helical gear W.
May not be formed. This is because that by applying a high frequency current to the high-frequency heating coil, along the teeth W 1 is the unevenness of the end face of the gear W helical induction current generated in the surface of the gear W helical which is a work This is due to uneven flow. Gear W helical includes teeth W 1 is the unevenness is not skewed relative to the axial W 5, and since it is heated in a short time current density is high, tooth trace of the tooth portion W 1 the W 3 being the ends W 2 of the side surface of the side on which the angle between the end face of the helical gear W becomes obtuse is no flow induced current. Therefore, since the end portion W 2 is not heated, it is of hardened layer even when cooled immediately after the completion of heating is not formed. If there is a portion where such a hardened layer is not formed, pitching or the like is likely to occur if the gear of the mating partner meshes with this portion.
【０００５】本発明は上記事情に鑑みて創案されたもの
で、はすば歯車のように軸芯に対して斜めになった凹凸
が形成されたワークであっても均一な硬化層を形成する
ことができる高周波焼入装置及び方法を提供することを
目的としている。The present invention has been made in view of the above circumstances, and forms a uniform hardened layer even on a work having unevenness oblique to an axis, such as a helical gear. It is an object of the present invention to provide an induction hardening apparatus and a method that can perform the above-described steps.
【０００６】[0006]
【課題を解決するための手段】本発明に係る高周波焼入
装置は、軸芯に対して斜めになった凹凸が形成されたワ
ークの前記凹凸に高周波輪郭焼入を施す高周波焼入装置
であって、前記凹凸を加熱する高周波加熱コイルと、加
熱された凹凸を冷却する冷却手段とを備えており、高周
波加熱コイルで凹凸を加熱した後、高周波加熱コイルに
よる加熱が終了してから所定の時間が経過した後に、冷
却液にて凹凸を冷却するように構成されている。SUMMARY OF THE INVENTION An induction hardening apparatus according to the present invention is an induction hardening apparatus for performing high-frequency contour quenching on the unevenness of a work having unevenness inclined with respect to an axis. A high-frequency heating coil for heating the irregularities, and a cooling means for cooling the heated irregularities. After the irregularities are heated by the high-frequency heating coil, a predetermined time is elapsed after the heating by the high-frequency heating coil ends. After the time elapses, the unevenness is cooled by the cooling liquid.
【０００７】また、本発明に係る高周波焼入方法は、軸
芯に対して斜めになった凹凸が形成されたワークの前記
凹凸に高周波輪郭焼入を施す高周波焼入方法であって、
高周波加熱コイルで凹凸を加熱した後、高周波加熱コイ
ルによる加熱が終了してから所定の時間が経過した後
に、冷却液にて凹凸を冷却するようになっている。Further, the induction hardening method according to the present invention is an induction hardening method for performing high-frequency contour hardening on the unevenness of a work having unevenness formed obliquely to an axis.
After the irregularities are heated by the high-frequency heating coil, the irregularities are cooled by the cooling liquid after a predetermined time has elapsed from the end of the heating by the high-frequency heating coil.
【０００８】[0008]
【発明の実施の形態】図１は本発明の実施の形態に係る
高周波焼入装置の概略的構成図、図２は本発明の実施の
形態に係る高周波焼入装置によって高周波輪郭焼入が施
されたワークとしてのはすば歯車の概略的斜視図、図３
は図２の概略的Ａ−Ａ線断面図、図４は本発明の他の実
施の形態に係る高周波焼入装置の概略的構成図である。FIG. 1 is a schematic diagram showing the configuration of an induction hardening apparatus according to an embodiment of the present invention. FIG. 2 is a view showing an example of the induction hardening performed by the induction hardening apparatus according to the embodiment of the present invention. Schematic perspective view of a helical gear as a finished work, FIG.
Is a schematic sectional view taken along line AA of FIG. 2, and FIG. 4 is a schematic configuration diagram of an induction hardening apparatus according to another embodiment of the present invention.
【０００９】本発明の実施の形態に係る高周波焼入装置
は、軸芯Ｗ5 に対して斜めになった凹凸である歯部Ｗ1
が形成されたワークであるはすば歯車Ｗの前記歯部Ｗ1
に高周波輪郭焼入を施す高周波焼入装置であって、はす
ば歯車Ｗの歯部Ｗ1 を加熱する高周波加熱コイル１００
と、加熱された歯部Ｗ1 を冷却液Ｌにて冷却する冷却手
段としての貯溜タンク２００とを備えており、高周波加
熱コイル１００で歯部Ｗ1 を加熱した後、高周波加熱コ
イル１００による加熱が終了してから所定の時間が経過
した後に、貯溜タンク２００の冷却液Ｌにはすば歯車Ｗ
を浸漬して冷却するようになっている。In the induction hardening apparatus according to the embodiment of the present invention, the tooth portion W 1 which is an uneven surface which is inclined with respect to the axis W 5 .
The tooth portion W 1 of the helical gear W which is a workpiece having
High-frequency heating coil 100 a induction hardening apparatus for performing the high-frequency contour hardening, for heating the teeth W 1 of the gear W helical in
And a storage tank 200 as a cooling means for cooling the heated tooth portion W 1 with the cooling liquid L. After the tooth portion W 1 is heated by the high-frequency heating coil 100, heating is performed by the high-frequency heating coil 100. After a predetermined time has passed since the end of the process, the helical gear W is added to the coolant L in the storage tank 200.
Is immersed and cooled.
【００１０】ワークであるはすば歯車Ｗは、図２に示す
ように、軸芯Ｗ5 に対して斜めになった歯部Ｗ1 を有す
るものである。より厳密に定義すると、はすば歯車Ｗと
は、歯すじがつるまき線である円筒歯車をいう。[0010] Gear W helical which is a work, as shown in FIG. 2, and has a toothed portion W 1 which is oblique with respect to the axial center W 5. More precisely, the helical gear W refers to a cylindrical gear having a helical toothed line.
【００１１】前記高周波加熱コイル１００は、リング状
に形成されており、はすば歯車Ｗの歯部Ｗ1 に対して所
定の間隔で対向する加熱導体１１０と、この加熱導体１
１０と高周波電源４００とを接続するための給電導体１
２０とを有している。The high-frequency heating coil 100 is formed in a ring shape, and has a heating conductor 110 facing the tooth portion W 1 of the helical gear W at a predetermined interval,
Feeder 1 for connecting power supply 10 and high-frequency power supply 400
20.
【００１２】この高周波加熱コイル１００は、銅製等の
導電性のパイプから構成されており、自身の過熱を防止
するために内部に水等の冷却液を循環させるようになっ
ている。The high-frequency heating coil 100 is formed of a conductive pipe made of copper or the like, and circulates a cooling liquid such as water inside to prevent overheating of itself.
【００１３】一方、貯溜タンク２００は、冷却液Ｌが貯
溜されたものであり、前記高周波加熱コイル１００の真
下に設けられている。On the other hand, the storage tank 200 stores the cooling liquid L, and is provided immediately below the high-frequency heating coil 100.
【００１４】さらに、この高周波焼入装置には、前記は
すば歯車Ｗを支持するワーク支持部３００、ワーク支持
部３００へのはすば歯車Ｗの着脱を行うハンドリング装
置 (図示省略) 等が設けられている。前記ワーク支持部
３００は、ワークであるはすば歯車Ｗを高周波加熱コイ
ル１００の内側の加熱位置と、その真下の貯溜タンク２
００の冷却位置との間を移動するようになっている。な
お、はすば歯車Ｗの上下両面には、コンセントリング３
１０がセットされている。Further, the induction hardening device includes a work supporting portion 300 for supporting the helical gear W, and a handling device (not shown) for attaching and detaching the helical gear W to and from the work supporting portion 300. Is provided. The work supporting portion 300 is configured to move the helical gear W, which is a work, to a heating position inside the high-frequency heating coil 100 and a storage tank 2 directly below the heating position.
00 and a cooling position of 00. The upper and lower surfaces of the helical gear W are provided with a concentrating ring 3.
10 is set.
【００１５】次に、この高周波焼入装置の動作について
説明する。まず、はすば歯車Ｗはワーク支持部３００に
水平に支持され、はすば歯車Ｗの歯部Ｗ1 の周囲には高
周波加熱コイル１００がセットされているものとする。
すなわち、はすば歯車Ｗは加熱位置にあるのである。Next, the operation of the induction hardening apparatus will be described. First, the gear W helical is supported horizontally on the work supporting unit 300, the periphery of the teeth W 1 of the gear W helical shall frequency heating coil 100 is set.
That is, the helical gear W is at the heating position.
【００１６】高周波電源から高周波加熱コイル１００に
高周波電流が供給される。例えば、直径１６０ミリ、厚
さ１０ミリでＦＣＤ７００からなるはすば歯車Ｗの場合
には、高周波加熱コイル１００に２００ＫＨｚの高周波
電流を０．２秒供給する。この間、すなわち高周波加熱
コイル１００による加熱が行われる間、はすば歯車Ｗ
は、均一な加熱のために、図１に矢印Ａで示されるよう
に、ワーク支持部３００によって軸芯Ｗ5 を中心しとて
回転駆動されている。A high frequency current is supplied to a high frequency heating coil 100 from a high frequency power supply. For example, in the case of a helical gear W having a diameter of 160 mm and a thickness of 10 mm and made of FCD700, a high-frequency current of 200 KHz is supplied to the high-frequency heating coil 100 for 0.2 seconds. During this time, that is, while the heating by the high-frequency heating coil 100 is performed, the helical gear W
It is for uniform heating, as indicated by arrow A in FIG. 1, and is rotated by O and around the axis W 5 by workpiece support 300.
【００１７】これにより、はすば歯車Ｗの歯部Ｗ1 の表
面に誘導電流が流れて表面を加熱する。しかし、歯部Ｗ
1 の歯すじＷ3 とはすば歯車Ｗの端面とがなす角度が鈍
角になった側の側面の端部Ｗ2 には誘導電流は流れない
のである。高周波電流の通電を開始してから０．２秒が
経過すると、高周波電流の通電を停止する。[0017] Thus, the induced current in the teeth W 1 of the surface of the gear W helical heating the surface flow. However, the teeth W
The first tooth trace W 3 and the end portion W 2 of the side surface on the side obtuse angle formed by the end face of the helical gear W is the induced current does not flow. When 0.2 seconds have elapsed since the start of the application of the high-frequency current, the application of the high-frequency current is stopped.
【００１８】そして、１．０秒後にワーク支持部３００
の冷却位置への下降（図１の矢印Ｂ参照）により、はす
ば歯車Ｗを貯溜タンク２００の冷却液Ｌに浸漬する。前
記端部Ｗ2 には、誘導電流が流れていないので、直接的
には加熱れていないが、はすば歯車Ｗが冷却液Ｌに浸漬
されるまでの間に、前記端部Ｗ2 の部分には誘導電流で
加熱された部分の熱が伝わって加熱されることになる。
なお、はすば歯車Ｗを冷却液Ｌに浸漬している間は、軸
芯Ｗ5 を中心とした回転駆動は停止されている。After 1.0 second, the work support 300
Is lowered to the cooling position (see the arrow B in FIG. 1), so that the helical gear W is immersed in the cooling liquid L in the storage tank 200. The said end portion W 2, since the induced current does not flow, but not to directly be heated, until the gear W is immersed in the cooling liquid L helical, said end W 2 The portion is heated by the heat of the portion heated by the induced current.
Incidentally, while immersing the gear W to the cooling liquid L helical, the rotational driving around the shaft center W 5 is stopped.
【００１９】１．０秒が経過したならば、すなわち端部
Ｗ2 にまで熱が伝わってから初めて冷却液Ｌに浸漬す
る。これにより、従来は硬化層Ｗ4 が形成されなかった
端部Ｗ2 にまで硬化層Ｗ4 が形成されることになる。な
お、図２及び図３では硬化層Ｗ4 が形成されている部分
を斜線で示している。After the elapse of 1.0 second, that is, after the heat has been transmitted to the end portion W 2 , it is immersed in the coolant L. Thus, conventionally would cured layer W 4 is formed to the end W 2 of the hardened layer W 4 is not formed. Also shows a portion of the hardened layer W 4 2 and 3 are formed by oblique lines.
【００２０】このようにして高周波焼入が施されたはす
ば歯車Ｗは、図３に示すように、従来は硬化層が形成さ
れなかった端部Ｗ2 にも硬化層Ｗ4 が形成されているの
が確認できた。[0020] Gear W helical induction hardening has been performed in this manner, as shown in FIG. 3, conventionally hardened layer W 4 is formed in an end portion W 2 of the hardened layer is not formed Was confirmed.
【００２１】ただし、加熱終了後に冷却を開始するまで
の間の時間が長すぎると、歯底の温度が下がり、歯底深
さが浅くなったり、焼が入らなかったりすることがあ
る。このため、高周波電流の通電の停止から１．０秒以
内に冷却液Ｌを噴射して強制的に冷却することが重要で
ある。However, if the time from the end of the heating to the start of the cooling is too long, the temperature of the root may decrease, and the depth of the root may become shallow, or burning may not occur. For this reason, it is important to forcibly cool the coolant L by injecting the coolant L within 1.0 second after the supply of the high-frequency current is stopped.
【００２２】各種のはすば歯車Ｗに実際に高周波焼入を
施してみた結果、以下のことが判明した。まず、加熱時
間がＡ（秒）であった場合には、高周波電流の供給を停
止してから少なくとも２Ａ（秒）が経過した後かつ８Ａ
（秒）が経過する以前に冷却液Ｌにて冷却することが必
要である。これは、上述したように、加熱の停止から冷
却の開始までの時間が短すぎると、誘導電流では加熱さ
れなかった前記端部Ｗ2 が加熱されず、加熱の停止から
冷却の開始までの時間が長すぎると、誘導電流で加熱さ
れた部分が冷却してしまうためである。As a result of actually performing induction hardening on various helical gears W, the following was found. First, when the heating time is A (second), after the supply of the high-frequency current is stopped, at least 2 A (second) has elapsed and 8 A
It is necessary to cool with the cooling liquid L before (second) elapses. This is because, as described above, when the time from the stop of the heating to the start of cooling is too short, induction is not heated the end W 2 that has not been heated by the current, the time until the start of cooling from the stop of the heating If the length is too long, the portion heated by the induced current will be cooled.
【００２３】なお、上述した実施の形態では、冷却手段
として冷却液Ｌが貯溜された貯溜タンク２００を挙げ、
この貯溜タンク２００にはすば歯車Ｗを浸漬するように
したが、本発明はこれに限定されるものではない。例え
ば、図４に示すように、高周波加熱コイル１００の下側
に冷却ジャケット５００を設けておき、はすば歯車Ｗを
高周波加熱コイル１００の加熱導体１１０に対向させて
加熱した後、ワーク支持部３００を下降させてはすば歯
車Ｗを冷却ジャケット５００に対向させて噴射孔５１０
から冷却液Ｌを噴射することによってはすば歯車Ｗを冷
却するようにしてもよい。In the above-described embodiment, a storage tank 200 storing the cooling liquid L is used as the cooling means.
Although the helical gear W is immersed in the storage tank 200, the present invention is not limited to this. For example, as shown in FIG. 4, a cooling jacket 500 is provided below the high-frequency heating coil 100, and the helical gear W is heated so as to be opposed to the heating conductor 110 of the high-frequency heating coil 100. 300 is lowered so that the helical gear W faces the cooling jacket 500 and the injection holes 510
The helical gear W may be cooled by injecting the cooling liquid L from the nozzle.
【００２４】また、はすば歯車Ｗのサイズや形成される
べき硬化層の深さ寸法等によっても加熱される時間と、
加熱を停止してから冷却を開始する時間とが２Ａ〜８Ａ
であることが判明した。The heating time also depends on the size of the helical gear W, the depth of the hardened layer to be formed, and the like.
The time to start cooling after stopping heating is 2A to 8A
Turned out to be.
【００２５】なお、上述した実施の形態では、ワークと
してはすば歯車Ｗを挙げたが、例えばはすば内歯車やや
まば歯車にも応用することができるのは勿論である。In the above-described embodiment, the helical gear W is used as the work. However, it is needless to say that the present invention can be applied to a helical internal gear and a helical gear.
【００２６】[0026]
【発明の効果】本発明に係る高周波焼入装置は、軸芯に
対して斜めになった凹凸が形成されたワークの前記凹凸
に高周波輪郭焼入を施す高周波焼入装置であって、前記
凹凸を加熱する高周波加熱コイルと、加熱された凹凸を
冷却液にて冷却する冷却手段とを備えており、高周波加
熱コイルで凹凸を加熱した後、高周波加熱コイルによる
加熱が終了してから所定の時間が経過した後に、冷却液
にて凹凸を冷却するように構成されている。The induction hardening apparatus according to the present invention is an induction hardening apparatus for performing high-frequency contour hardening on the unevenness of a workpiece having unevenness oblique to an axis. And a cooling means for cooling the heated irregularities with a cooling liquid, and after heating the irregularities with the high-frequency heating coil, a predetermined time after the heating by the high-frequency heating coil is completed. After the time elapses, the unevenness is cooled by the cooling liquid.
【００２７】ワークの凹凸にの表面に誘導電流が流れる
ことによって加熱された部分の熱が、高周波電流の供給
を停止した後に、誘導電流によって加熱されなかった部
分に伝わりその部分を加熱する。その後に、冷却液が凹
凸に噴射されるので凹凸が全体にわたって加熱された後
に冷却されるため、凹凸に高周波焼入を確実に施すとが
できる。従って、歯幅全体にわたって高周波焼入が施さ
れるので、ピッチング等の問題を起こすことがない。After the supply of the high-frequency current is stopped, the heat of the portion heated by the induction current flowing on the surface of the unevenness of the work is transmitted to the portion not heated by the induction current, thereby heating that portion. After that, since the cooling liquid is sprayed onto the unevenness, the unevenness is heated after being heated over the entire surface, so that the unevenness can be reliably subjected to the induction hardening. Therefore, since induction hardening is performed over the entire tooth width, problems such as pitching do not occur.
【００２８】また、前記所定の時間を、高周波加熱コイ
ルによる加熱時間の少なくとも２倍以上の時間に設定し
ておくと、誘導電流で加熱されなかった部分へも誘導電
流で加熱された部分から確実に熱が伝わり、凹凸全体に
確実に高周波焼入を施すことができる。Further, if the predetermined time is set to be at least twice as long as the heating time by the high-frequency heating coil, a portion that is not heated by the induction current is surely protected from the portion heated by the induction current. Heat is transmitted to the entire surface, so that induction hardening can be reliably applied to the entire unevenness.
【００２９】さらに、前記所定の時間を、高周波加熱コ
イルによる加熱時間の少なくとも２倍以上かつ８倍以下
に設定しておくと、誘導電流で加熱された部分から放熱
して冷えることがないので、凹凸に確実に高周波焼入を
施すことができる。Further, if the predetermined time is set to be at least twice and not more than eight times the heating time by the high-frequency heating coil, the portion heated by the induced current does not radiate heat and cool down. Induction quenching can be reliably applied to the irregularities.
【００３０】一方、本発明に係る高周波焼入方法は、軸
芯に対して斜めになった凹凸が形成されたワークの前記
凹凸に高周波輪郭焼入を施す高周波焼入方法であって、
高周波加熱コイルで凹凸を加熱した後、高周波加熱コイ
ルによる加熱が終了してから所定の時間が経過した後
に、冷却液にて凹凸を冷却するようになっている。On the other hand, the induction hardening method according to the present invention is an induction hardening method for performing high-frequency contour hardening on the unevenness of a work having unevenness oblique to an axis.
After the irregularities are heated by the high-frequency heating coil, the irregularities are cooled by the cooling liquid after a predetermined time has elapsed from the end of the heating by the high-frequency heating coil.
【００３１】この高周波焼入方法によると、ワークの凹
凸の表面に誘導電流が流れることによって加熱された部
分の熱が、高周波電流の供給を停止した後に、誘導電流
によって加熱されなかった部分に伝わりその部分を加熱
する。その後に、冷却液にて凹凸を冷却するので凹凸が
全体にわたって加熱された後に冷却されるため、凹凸に
高周波焼入を確実に施すとができる。従って、歯幅全体
にわたって高周波焼入が施されるので、ピッチング等の
問題が生じない。According to the induction hardening method, the heat of the portion heated by the induction current flowing on the uneven surface of the work is transferred to the portion not heated by the induction current after the supply of the high frequency current is stopped. Heat the part. After that, since the unevenness is cooled by the cooling liquid, the unevenness is cooled after the entire unevenness is heated, so that the unevenness can be reliably subjected to the induction hardening. Accordingly, since induction hardening is performed over the entire tooth width, problems such as pitching do not occur.
【００３２】また、前記所定の時間を、高周波加熱コイ
ルによる加熱時間の少なくとも倍以上の時間に設定して
おくと、誘導電流で加熱されなかった部分へも誘導電流
で加熱された部分から確実に熱が伝わり、凹凸全体に確
実に高周波輪郭焼入を施すことができる。Further, if the predetermined time is set to be at least twice as long as the heating time by the high-frequency heating coil, a portion not heated by the induction current can be surely switched from the portion heated by the induction current. Heat is transmitted, and high-frequency contour quenching can be reliably applied to the entire unevenness.
【００３３】さらに、前記所定の時間を、高周波加熱コ
イルによる加熱時間の少なくとも２倍以上かつ８倍以下
にすると、誘導電流で加熱された部分から放熱して冷え
ることがないので、凹凸全体に確実に高周波輪郭焼入を
施すことができる。Further, if the predetermined time is at least twice and eight times or less the heating time by the high-frequency heating coil, heat is not radiated from the portion heated by the induced current and does not cool down. Can be subjected to high frequency contour quenching.
【図１】本発明の実施の形態に係る高周波焼入装置の概
略的構成図である。FIG. 1 is a schematic configuration diagram of an induction hardening device according to an embodiment of the present invention.
【図２】本発明の実施の形態に係る高周波焼入装置によ
って高周波輪郭焼入が施されたワークとしてのはすば歯
車の概略的斜視図である。FIG. 2 is a schematic perspective view of a helical gear as a workpiece on which high-frequency contour hardening has been performed by the high-frequency hardening apparatus according to the embodiment of the present invention.
【図３】図２の概略的Ａ−Ａ線断面図である。FIG. 3 is a schematic sectional view taken along line AA of FIG. 2;
【図４】本発明の他の実施の形態に係る高周波焼入装置
の概略的構成図である。FIG. 4 is a schematic configuration diagram of an induction hardening device according to another embodiment of the present invention.
【図５】従来の高周波焼入装置によって高周波輪郭焼入
が施されたワークとしてのはすば歯車の概略的斜視図で
ある。FIG. 5 is a schematic perspective view of a helical gear as a work on which high-frequency contour hardening has been performed by a conventional high-frequency hardening apparatus.
【図６】図５の概略的Ｂ−Ｂ線断面図である。FIG. 6 is a schematic sectional view taken along line BB of FIG. 5;
１００ 高周波加熱コイル ２００ 貯溜タンク（冷却手段） Ｌ 冷却液 Ｗ はすば歯車（ワーク） Ｗ1 歯部（凹凸） Ｗ5 軸芯REFERENCE SIGNS LIST 100 high frequency heating coil 200 storage tank (cooling means) L cooling liquid W helical gear (work) W 1 tooth portion (irregularities) W 5 axis core
Claims (6)
れたワークの前記凹凸に高周波輪郭焼入を施す高周波焼
入装置であって、前記凹凸を加熱する高周波加熱コイル
と、加熱された凹凸を冷却液にて冷却する冷却手段とを
具備しており、高周波加熱コイルで凹凸を加熱した後、
高周波加熱コイルによる加熱が終了してから所定の時間
が経過した後に、冷却液にて凹凸を冷却することを特徴
とする高周波焼入装置。1. An induction hardening apparatus for performing high-frequency contour quenching on an uneven surface of a work having unevenness inclined with respect to an axis, comprising: a high-frequency heating coil for heating the unevenness; Cooling means for cooling the unevenness with a cooling liquid, and after heating the unevenness with a high-frequency heating coil,
An induction hardening device characterized by cooling irregularities with a cooling liquid after a predetermined time has passed since the end of heating by the induction heating coil.
よる加熱時間の少なくとも２倍以上の時間であることを
特徴とする請求項１記載の高周波焼入装置。2. The induction hardening apparatus according to claim 1, wherein the predetermined time is at least twice as long as the heating time by the high frequency heating coil.
よる加熱時間の少なくとも２倍以上かつ８倍以下である
ことを特徴とする請求項１記載の高周波焼入装置。3. The induction hardening apparatus according to claim 1, wherein the predetermined time is at least twice and eight times or less the heating time by the high frequency heating coil.
れたワークの前記凹凸に高周波輪郭焼入を施す高周波焼
入方法であって、高周波加熱コイルで凹凸を加熱した
後、高周波加熱コイルによる加熱が終了してから所定の
時間が経過した後に、冷却液にて凹凸を冷却することを
特徴とする高周波焼入方法。4. A high-frequency quenching method for performing high-frequency contour quenching on the irregularities of a work having irregularities inclined with respect to an axis, wherein the irregularities are heated by a high-frequency heating coil, and then the high-frequency heating is performed. An induction hardening method characterized by cooling irregularities with a cooling liquid after a predetermined time has passed since the end of heating by the coil.
よる加熱時間の少なくとも２倍以上の時間であることを
特徴とする請求項４記載の高周波焼入方法。5. The induction hardening method according to claim 4, wherein the predetermined time is at least twice as long as the heating time by the high frequency heating coil.
よる加熱時間の少なくとも２倍以上かつ８倍以下である
ことを特徴とする請求項４記載の高周波焼入方法。6. The induction hardening method according to claim 4, wherein the predetermined time is at least twice and eight times or less the heating time by the high frequency heating coil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23773497A JP3347030B2 (en) | 1997-08-18 | 1997-08-18 | Induction hardening apparatus and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23773497A JP3347030B2 (en) | 1997-08-18 | 1997-08-18 | Induction hardening apparatus and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH1161241A true JPH1161241A (en) | 1999-03-05 |
| JP3347030B2 JP3347030B2 (en) | 2002-11-20 |
Family
ID=17019693
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23773497A Expired - Lifetime JP3347030B2 (en) | 1997-08-18 | 1997-08-18 | Induction hardening apparatus and method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3347030B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010180444A (en) * | 2009-02-04 | 2010-08-19 | Fuji Electronics Industry Co Ltd | High frequency induction-hardening apparatus for helical gear |
| JP2015214756A (en) * | 2015-07-02 | 2015-12-03 | Ntn株式会社 | Method of manufacturing bering ring, bearing ring, cylindrical roller bearing and tapered roller bearing |
| US9487843B2 (en) | 2011-01-21 | 2016-11-08 | Ntn Corporation | Method for producing a bearing ring |
-
1997
- 1997-08-18 JP JP23773497A patent/JP3347030B2/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010180444A (en) * | 2009-02-04 | 2010-08-19 | Fuji Electronics Industry Co Ltd | High frequency induction-hardening apparatus for helical gear |
| US9487843B2 (en) | 2011-01-21 | 2016-11-08 | Ntn Corporation | Method for producing a bearing ring |
| JP2015214756A (en) * | 2015-07-02 | 2015-12-03 | Ntn株式会社 | Method of manufacturing bering ring, bearing ring, cylindrical roller bearing and tapered roller bearing |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3347030B2 (en) | 2002-11-20 |
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