JP5034019B2 - Induction heating coil and heating method for rimmed thrust bearing race - Google Patents

Induction heating coil and heating method for rimmed thrust bearing race Download PDF

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JP5034019B2
JP5034019B2 JP2005245470A JP2005245470A JP5034019B2 JP 5034019 B2 JP5034019 B2 JP 5034019B2 JP 2005245470 A JP2005245470 A JP 2005245470A JP 2005245470 A JP2005245470 A JP 2005245470A JP 5034019 B2 JP5034019 B2 JP 5034019B2
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edge
thrust bearing
annular
heated
heating coil
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裕 清澤
嘉昌 田中
慎太郎 鈴木
恒哲 平岡
俊之 小橋
敦史 山下
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NTN Corp
Neturen Co Ltd
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Neturen Co Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
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    • Y02P10/00—Technologies related to metal processing
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Description

本発明は、例えば図７に示すスラスト軸受の軌道輪Ｂ１，Ｂ２のように板材をプレス加工して縁Ｅをたち上げて形成させた縁付スラスト軸受軌道輪の焼入れなどにおいて、平面から誘導加熱する誘導加熱コイル及び加熱方法に関するものである。 In the present invention, for example, in the case of quenching of the edge-bearing thrust bearing raceway ring formed by pressing the plate material such as the thrust bearing raceways B1 and B2 of the thrust bearing shown in FIG. The present invention relates to an induction heating coil and a heating method.

誘導加熱による環状部材の加熱は広く行われており、平板状の環状部材の誘導加熱については特許文献１、２などが開示されている。これらは、図６（ａ）のように、平板状の被加熱環状部材Ｗの両面に平板状の環状コイルＣ１，Ｃ１を配設して両面から加熱したり（特許文献１、２）、図６（ｂ）のように複数まきの渦巻状コイルＣ２，を片面又は両面に配設して加熱するものである。
特許第３６２３８１５号公報 特許第３６３８６４７号公報 Heating of the annular member by induction heating is widely performed, and Patent Documents 1 and 2 are disclosed for induction heating of the plate-like annular member. As shown in FIG. 6A, these are provided with flat annular coils C1 and C1 on both surfaces of a flat plate-like heated annular member W and heated from both sides (Patent Documents 1 and 2). As shown in FIG. 6B, a plurality of spiral coils C2 are disposed on one side or both sides and heated.
Japanese Patent No. 3623815 Japanese Patent No. 3638647

上記特許文献１、２の方法は平板状の環状部材の誘導加熱には非常に有効である。しかしながら、例えば図７のスラスト軸受の軌道輪Ｂ1 ，Ｂ2 に使用される、図１、３に示すような板材をプレス加工して縁を形成させた縁付スラスト軸受軌道輪を特許文献１、２のコイルで加熱すると、縁部が過熱される一方底部の温度が上がらず、均一な焼入れ硬さが得られないという問題点がある。 The methods disclosed in Patent Documents 1 and 2 are very effective for induction heating of a flat annular member. However, for example, is used in the bearing ring B 1, B 2 of the thrust bearing of FIG. 7, No. plate material to press working to rimmed thrust bearing ring having formed the edge as shown in FIGS. 1 and 3 Laid When heated with two coils, the edge is overheated, while the temperature at the bottom does not rise, and uniform quenching hardness cannot be obtained.

そこで本発明は、上記問題点を解決し、縁付スラスト軸受軌道輪においても縁部と底部に均一な加熱温度が得られる誘導加熱コイルと加熱方法を提供することを目的とする。 SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide an induction heating coil and a heating method capable of solving the above-described problems and obtaining a uniform heating temperature at the edge portion and the bottom portion even in the edged thrust bearing race .

上記目的を達成するために、本発明の縁付スラスト軸受軌道輪の誘導加熱コイルは、環状の底部の外周に円縁部が立上げて形成された縁付スラスト軸受軌道輪を誘導加熱する加熱コイルにおいて、前記縁部上面と所定間隔をもって対応する環状平面を有する縁対応環状部と、前記底部平面と所定間隔をもって対応する環状平面を有する底対応環状部とが設けられた段付き板状環状導体からなり、前記縁対応環状部の外径が被加熱縁付スラスト軸受軌道輪の外径より大きく、前記底対応環状部の内径が被加熱縁付スラスト軸受軌道輪の内径と等しいか又はそれより大きく、かつ底対応環状部の段の外周が被加熱縁付スラスト軸受軌道輪の縁部内周と所定間隔で対応する径を有し、縁部立上がりの片面から加熱することを特徴とするものである。
 In order to achieve the above object, an induction heating coil for an edge thrust bearing raceway of the present invention is a heating for induction heating of an edge thrust bearing raceway ring formed by raising a circular edge on the outer periphery of an annular bottom. In the coil, a stepped plate-like ring provided with an edge-corresponding annular part having an annular plane corresponding to the upper surface of the edge part with a predetermined interval, and a bottom-corresponding annular part having an annular plane corresponding to the bottom part plane with a predetermined interval It is made of a conductor, and the outer diameter of the edge-corresponding annular part is larger than the outer diameter of the heated edge-equipped thrust bearing ring, and the inner diameter of the bottom-corresponding annular part is equal to or equal to the inner diameter of the heated edge-equipped thrust bearing ring. Larger and the outer periphery of the step of the bottom corresponding annular portion has a diameter corresponding to the inner periphery of the edge of the thrust bearing race ring to be heated at a predetermined interval, and is heated from one side of the rising edge It is.

また、本発明の縁付スラスト軸受軌道輪の誘導加熱コイルは、環状の底部の内周に円縁部が立上げて形成された縁付スラスト軸受軌道輪を誘導加熱する加熱コイルにおいて、前記縁部上面と所定間隔をもって対応する環状平面を有する縁対応環状部と、前記底部平面と所定間隔をもって対応する環状平面を有する底対応環状部とが設けられた段付き板状環状導体からなり、前記底対応環状部の外径が被加熱縁付スラスト軸受軌道輪の外径より大きく、前記縁対応環状部の内径が被加熱縁付スラスト軸受軌道輪の内径と等しいか又はそれより大きく、かつ底対応環状部の段の内周が被加熱縁付スラスト軸受軌道輪の縁部外周と所定間隔で対応する径を有し、縁部立上がりの片面から加熱することを特徴とするものである。 Further, the induction heating coil rimmed thrust bearing ring of the present invention is a heating coil for induction heating of the edges with a thrust bearing ring which ¥¥ portion on the inner periphery is formed with raised annular bottom, the edge A stepped plate-shaped annular conductor provided with an edge-corresponding annular part having an annular plane corresponding to the upper surface of the part with a predetermined interval; and a bottom corresponding annular part having an annular plane corresponding to the bottom plane with a predetermined interval; The outer diameter of the bottom corresponding annular part is larger than the outer diameter of the heated edge-equipped thrust bearing ring , the inner diameter of the edge corresponding annular part is equal to or larger than the inner diameter of the heated edge-bearing thrust bearing ring , and the bottom the inner periphery of the stage of the corresponding annular portion is characterized in that have a diameter corresponding with the edge periphery by a predetermined distance in the thrust bearing ring with the heated edges is heated from one side of the rising edge.

また、本発明の縁付スラスト軸受軌道輪の誘導加熱コイルは、環状の底部の内周と外周とに円縁部が立上げて形成された縁付スラスト軸受軌道輪を誘導加熱する加熱コイルにおいて、前記内周縁部上面と所定間隔をもって対応する環状平面を有する内縁対応環状部と、前記外周縁部上面と所定間隔をもって対応する環状平面を有する外縁対応環状部と、前記底部平面と所定間隔をもって対応する環状平面を有する底対応環状部とが設けられた段付き板状環状導体からなり、前記外縁対応環状部の外径が被加熱縁付スラスト軸受軌道輪の外径より大きく、前記内縁対応環状部の内径が被加熱縁付スラスト軸受軌道輪の内径と等しいか又はそれより大きく、かつ底対応環状部の段の内周が被加熱縁付スラスト軸受軌道輪の内周縁部の外周と所定間隔で対応し、段の外周が被加熱縁付スラスト軸受軌道輪の外周縁部の内周と所定間隔で対応する径を有し、縁部立上がりの片面から加熱することを特徴とするものである。
Also, edge thrust bearing ring induction heating coil with the present invention is a heating coil for induction heating of the inner periphery and the outer periphery and the thrust bearing ring with edge is circularly edges formed raised annular bottom An inner edge corresponding annular portion having an annular plane corresponding to the upper surface of the inner peripheral edge with a predetermined interval; an outer edge corresponding annular portion having an annular plane corresponding to the upper surface of the outer peripheral edge with a predetermined interval; and a predetermined interval from the bottom plane. A stepped plate-like annular conductor provided with a corresponding annular plane having an annular plane, and the outer diameter of the outer edge-corresponding annular part is larger than the outer diameter of the thrust bearing ring with a heated edge, corresponding to the inner edge The inner diameter of the annular portion is equal to or larger than the inner diameter of the heated bearing thrust ring bearing ring , and the inner circumference of the step of the bottom corresponding annular section is predetermined with the outer circumference of the inner peripheral edge of the heated bearing thrust ring bearing ring. while Corresponding in one in which the outer periphery of the stage have a corresponding diameter between the inner and the predetermined distance of the outer peripheral edge portion of the heated rimmed thrust bearing ring, characterized by heating from one side of the rising edge .

このような段付き環状導体を有する加熱コイルにより加熱すれば、底対応環状部の面で被加熱縁付スラスト軸受軌道輪の底部面を加熱し、縁対応環状部の面で縁部上部を加熱するので、従来の平板状環状コイルによる加熱の際に生ずるような縁部の過熱が防止でき、底部面と縁部が均一温度に加熱される。これにより、縁付スラスト軸受軌道輪の底部面と縁部に均一な焼入れ硬さが得られる。
そして、片面から加熱されるので簡易な装置で効果が得られる特徴がある。 If heated by a heating coil having such a stepped annular conductor, the bottom surface of the heated thrust bearing bearing ring is heated on the surface of the bottom corresponding annular portion, and the upper portion of the edge is heated on the surface of the edge corresponding annular portion. As a result, overheating of the edge as occurs during heating by the conventional flat annular coil can be prevented, and the bottom surface and the edge are heated to a uniform temperature. Thereby, uniform quenching hardness is obtained on the bottom surface and the edge of the thrust bearing raceway with edge.
And since it heats from one side, there exists the characteristic from which an effect is acquired with a simple apparatus.

また、加熱コイルの環状導体の外径を被加熱縁付スラスト軸受軌道輪の外径より大きくすることにより、縁付スラスト軸受軌道輪の外周をカバーして外周側の加熱温度を確保する。そして、縁付スラスト軸受軌道輪は熱容量の小さい内周側が熱容量の大きい外周側より温度上昇しやすい。そこで本発明の加熱コイルは、加熱コイルの環状導体の内径を縁付スラスト軸受軌道輪の内径と等しいか又はそれより大きくすることにより内周側の温度上昇を抑えて、縁付スラスト軸受軌道輪の内外周側の温度上昇を均一にするものである。また、厚肉段部の内径又は／及び外径をそれぞれ縁付スラスト軸受軌道輪の縁部の外周又は／及び内周と所定間隔で対応する径にして、縁部の加熱の均一を図るものである。 Further, by making the outer diameter of the annular conductor of the heating coil larger than the outer diameter of the heated edge bearing thrust ring , the outer periphery of the edge thrust bearing bearing ring is covered and the heating temperature on the outer periphery side is secured. In the edge-bearing thrust bearing race , the temperature on the inner peripheral side with a small heat capacity is more likely to rise than the outer peripheral side with a large heat capacity. Therefore, the heating coil of the present invention suppresses the temperature increase on the inner peripheral side by making the inner diameter of the annular conductor of the heating coil equal to or larger than the inner diameter of the edged thrust bearing raceway, thereby providing an edged thrust bearing raceway. The temperature rise on the inner and outer peripheral sides is made uniform. Further, the inner diameter and / or outer diameter of the thick-walled step portion is set to a diameter corresponding to the outer circumference or / and inner circumference of the edge portion of the edged thrust bearing raceway , respectively, so that the heating of the edge portion is uniform. It is.

また、本発明の縁付スラスト軸受軌道輪の誘導加熱方法は、請求項１から４に記載のいずれかの誘導加熱コイルを被加熱縁付スラスト軸受軌道輪の立上がり縁側の平面に対応させて縁付スラスト軸受軌道輪を片面から加熱することを特徴とするものである。 Further, the induction heating method of rimmed thrust bearing ring of the present invention, corresponding to the plane of the rising edge of the thrust bearing ring with the heated edge of one of the induction heating coil according to claims 1 to 4 edge The attached thrust bearing race is heated from one side .

本発明の縁付スラスト軸受軌道輪の誘導加熱コイル及び加熱方法によれば、従来の平板状環状導体の加熱コイルによる加熱では困難であった縁部の過熱を防止して均一温度に加熱でき、焼入れの際に縁付スラスト軸受軌道輪に均一な焼入れ硬さが得られる。 According to the induction heating coil and heating method of the edge thrust bearing raceway of the present invention, it is possible to prevent the overheating of the edge, which has been difficult with the heating by the heating coil of the conventional flat annular conductor, and to heat to a uniform temperature, Uniform quenching hardness can be obtained for the edge- bearing thrust bearing raceway during quenching.

以下、本発明の縁付スラスト軸受軌道輪の誘導加熱コイルと加熱方法について、図示の実施形態により具体的に説明する。図１は本発明第１実施形態の外側縁付スラスト軸受軌道輪の誘導加熱コイルの断面図、図２は図１の平面図である。図３は本発明第２実施形態の内側縁付スラスト軸受軌道輪の誘導加熱コイルの断面図、図４は本発明第３実施形態の内外側に縁付の縁付スラスト軸受軌道輪の誘導加熱コイルの断面図である。 Hereinafter, an induction heating coil and a heating method of an edge thrust bearing raceway of the present invention will be described in detail with reference to the illustrated embodiments. FIG. 1 is a cross-sectional view of an induction heating coil of a thrust bearing race of the first embodiment of the present invention, and FIG. 2 is a plan view of FIG. Figure 3 is the invention cross-sectional view of the induction heating coil of the thrust bearing ring with the inner edge of the second embodiment, FIG. 4 is an induction heating of the present invention rimmed thrust bearing ring of Enzuke into and out of the third embodiment It is sectional drawing of a coil.

［第１実施形態］
まず、図１及び２を用いて本発明第１実施形態について説明する。第１実施形態は底部Ｗ１ｂの外側に立上がり縁Ｗ１ａが設けられた縁付スラスト軸受軌道輪Ｗ１を加熱する誘導加熱コイルに関するものである。誘導加熱コイル１は、環状導体２の一部を切欠いて切欠き部にリード部３、３が設けられコイルを形成している。環状導体２には冷却用パイプがろー付けされて水冷されるようになっているが図示を省略した。加熱コイル１の環状導体２は、被加熱縁付スラスト軸受軌道輪（以下単にワークという）Ｗ１の縁部Ｗ１ａの上面に対応する平面を有する縁対応環状部２ａと底部Ｗ１ｂの面に対応する平面を有する底対応環状部２ｂからなる段付き板状の環状体をなしている。そして、縁対応環状部２ａの平面と縁Ｗ１ａとの間隔Ｇ１１及び底対応環状部２ｂの平面と底部Ｗ１ｂ平面との間隔Ｇ１３が所定値になるように段の高さが定められる。また、底対応環状部２ｂの段外周と縁Ｗ１ａの内周との間隔Ｇ１２も所定値になるように底対応環状部２ｂの段外径が定められる。環状導体２の外径Ｄ１１は、ワークＷの外径ｄ１１より大きくされている。一方環状導体２の内径Ｄ１２は、ワークＷの内径ｄ１２と等しいか、それより大きくされている。これにより、ワークＷの内外周側の熱容量の差による温度上昇の差がカバーされてワークＷの内外周が均一に温度上昇して加熱される。 [First Embodiment]
First, a first embodiment of the present invention will be described with reference to FIGS. 1st Embodiment is related with the induction heating coil which heats the edged thrust bearing raceway ring W1 in which the rising edge W1a was provided in the outer side of the bottom part W1b. The induction heating coil 1 is formed by notching a part of the annular conductor 2 and providing lead portions 3 and 3 at the notch. A cooling pipe is attached to the annular conductor 2 for water cooling, but the illustration is omitted. The annular conductor 2 of the heating coil 1 is a plane corresponding to the surfaces of the edge corresponding annular portion 2a and the bottom portion W1b having a plane corresponding to the upper surface of the edge portion W1a of the heated edge-bearing thrust bearing ring (hereinafter simply referred to as a workpiece) W1. A stepped plate-like annular body composed of a bottom corresponding annular portion 2b having The height of the step is determined so that the gap G11 between the plane of the edge-corresponding annular portion 2a and the edge W1a and the gap G13 between the plane of the bottom-corresponding annular portion 2b and the bottom W1b plane have predetermined values. Further, the step outer diameter of the bottom corresponding annular portion 2b is determined so that the gap G12 between the step outer periphery of the bottom corresponding annular portion 2b and the inner periphery of the edge W1a is also a predetermined value. The outer diameter D11 of the annular conductor 2 is larger than the outer diameter d11 of the workpiece W. On the other hand, the inner diameter D12 of the annular conductor 2 is equal to or larger than the inner diameter d12 of the workpiece W. Accordingly, the difference in temperature rise due to the difference in heat capacity between the inner and outer peripheral sides of the work W is covered, and the inner and outer circumferences of the work W are uniformly heated and heated.

実施例１は、図１の形状・寸法のワーク及びコイルを用いてワークを回転しながら２００ｋＨｚの周波数で誘導加熱して焼入れした。その諸元を表１に示す。   Example 1 was quenched by induction heating at a frequency of 200 kHz while rotating the workpiece using the workpiece and coil having the shape and dimensions shown in FIG. The specifications are shown in Table 1.

Figure 0005034019
Figure 0005034019

焼入れしたワークを、図２に示すような円周等間隔のＡ，Ｂ，Ｃ，Ｄの４か所の位置で切断して、幅方向の３か所のＡ１，Ａ２，Ａ３……の断面硬さを測定した。その結果を表２に示す。   The hardened workpiece is cut at four positions A, B, C, and D at equal circumferential intervals as shown in FIG. Hardness was measured. The results are shown in Table 2.

Figure 0005034019
Figure 0005034019

表２に示すように、本発明の加熱コイルを使用して加熱焼入れした結果は、ワークの底部も縁部も均一な焼入れ硬さが得られた。
これに対し、同じワークＷ１を図６に示す平板状の環状導体の加熱コイルで誘導加熱した場合は、ワークの底部Ｗ１ｂの温度が上がらず、温度を上げると縁部Ｗ１ａが過熱して均一な焼入れ硬さが得られなかった。 As shown in Table 2, as a result of heating and quenching using the heating coil of the present invention, uniform quenching hardness was obtained at the bottom and edge of the workpiece.
On the other hand, when the same workpiece W1 is induction-heated with the heating coil of the flat annular conductor shown in FIG. 6, the temperature of the bottom W1b of the workpiece does not rise, and when the temperature is raised, the edge W1a overheats and becomes uniform. Quenching hardness was not obtained.

［第２実施形態］
次に図３の本発明第２実施形態について説明する。第１実施形態が外縁の縁付ワークＷ１の加熱に対して、第２実施形態は底部Ｗ２ｂの内側に立上がり縁Ｗ２ａが設けられた縁付スラスト軸受軌道輪Ｗ２を加熱する誘導加熱コイルに関するものである。誘導加熱コイル１１は、環状導体１２の一部を切欠いて切欠き部にリード部１３、１３が設けられコイルを形成している。平面図は図２と同様であるので省略する。加熱コイル１１の環状導体１２は、ワークＷ２の縁部Ｗ２ａの上面に対応する平面を有する縁対応環状部１２ａと底部Ｗ２ｂの面に対応する平面を有する底対応環状部１２ｂからなる段付き板状の環状体をなしている。そして、縁対応環状部１２ａの平面と縁Ｗ２ａとの間隔及び底対応環状部１２ｂの平面と底部Ｗ２ｂ平面との間隔が所定値になるように段の高さが定められる。また、底対応環状部２ｂの段内周と縁Ｗ１ａの外周との間隔Ｇ２２も所定値になるように底対応環状部２ｂの段外径が定められる。環状導体１２の外径Ｄ２１は、ワークＷ２の外径ｄ２１より大きくされている。一方環状導体１２の内径Ｄ２２は、ワークＷ２の内径ｄ２２と等しいか、それより大きくされている。これにより、ワークＷの内外周側の熱容量の差による温度上昇の差がカバーされてワークＷの内外周が均一に温度上昇して加熱される。 [Second Embodiment]
Next, a second embodiment of the present invention shown in FIG. 3 will be described. The first embodiment relates to the induction heating coil that heats the edge-equipped thrust bearing ring W2 provided with the rising edge W2a on the inner side of the bottom portion W2b, whereas the second embodiment relates to the heating of the outer edge edged workpiece W1. is there. The induction heating coil 11 forms a coil by notching a part of the annular conductor 12 and providing lead portions 13 and 13 at the notch. The plan view is the same as FIG. The annular conductor 12 of the heating coil 11 is a stepped plate having an edge corresponding annular portion 12a having a plane corresponding to the upper surface of the edge W2a of the workpiece W2 and a bottom corresponding annular portion 12b having a plane corresponding to the surface of the bottom W2b. The ring is made. The height of the step is determined so that the distance between the plane of the edge-corresponding annular portion 12a and the edge W2a and the distance between the plane of the bottom-corresponding annular portion 12b and the bottom W2b plane are predetermined values. Further, the step outer diameter of the bottom corresponding annular portion 2b is determined so that the gap G22 between the inner periphery of the step corresponding to the bottom corresponding annular portion 2b and the outer periphery of the edge W1a is also a predetermined value. The outer diameter D21 of the annular conductor 12 is larger than the outer diameter d21 of the workpiece W2. On the other hand, the inner diameter D22 of the annular conductor 12 is equal to or larger than the inner diameter d22 of the workpiece W2. Accordingly, the difference in temperature rise due to the difference in heat capacity between the inner and outer peripheral sides of the work W is covered, and the inner and outer circumferences of the work W are uniformly heated and heated.

本発明の加熱コイルを使用して加熱焼入れした結果は、数値は省略するが第１実施形態と同様に底部も縁部も均一な焼入れ硬さが得られた。
これに対し、同じワークＷ２を図５６に示す平板状の環状導体の加熱コイルで誘導加熱した場合は、ワークの底部Ｗ２ｂの温度が上がらず、温度を上げると縁部Ｗ２ａが過熱して均一な焼入れ硬さが得られなかった。 As a result of heating and quenching using the heating coil of the present invention, although the numerical value is omitted, uniform quenching hardness is obtained at the bottom and the edge as in the first embodiment.
On the other hand, when the same workpiece W2 is induction-heated by the flat coiled conductor heating coil shown in FIG. 56, the temperature of the bottom W2b of the workpiece does not rise, and when the temperature is raised, the edge W2a overheats and becomes uniform. Quenching hardness was not obtained.

［第３実施形態］
次に図４の本発明第３実施形態について説明する。第３実施形態は内外周に縁を有するワークの加熱であり、図４に示すように底部Ｗ３ｂの外側に立上がり縁Ｗ３ａと、内側に立上がり縁Ｗ３ｃとが設けられた縁付スラスト軸受軌道輪Ｗ３を加熱する誘導加熱コイルに関するものである。誘導加熱コイル２１は、環状導体２２の一部を切欠いて切欠き部にリード部２３が設けられコイルを形成している。平面図は図２と同様であるので省略する。加熱コイル２１の環状導体２２は、ワークＷ３の外縁部Ｗ３ａの上面に対応する平面を有する外縁対応環状部２２ａと底部Ｗ３ｂの面に対応する平面を有する底対応環状部２２ｂと、さらに内縁部Ｗ３ｃの上面に対応する平面を有する内縁対応環状部２２ｃとからなる段付き板状の環状体をなしている。そして、内外縁対応環状部２２ａ，２２ｃの平面と内外縁Ｗ３ａ，Ｗ３ｃとの間隔Ｇ３１，Ｇ３４、及び底対応環状部２２ｂの平面と底部Ｗ３ｂ平面との間隔Ｇ３３が所定値になるように段の高さが定められる。環状導体２２の外径Ｄ３１は、ワークＷの外径ｄ３１より大きくされている。一方環状導体２２の内径Ｄ３２は、ワークＷ２の内径ｄ３２と等しいか、それより大きくされている。これにより、ワークＷ３の内外周側の熱容量の差による温度上昇の差がカバーされてワークＷ３の内外周が均一に温度上昇して加熱される。 [Third Embodiment]
Next, a third embodiment of the present invention shown in FIG. 4 will be described. The third embodiment is heating of a work having edges on the inner and outer circumferences, and as shown in FIG. 4, a thrust bearing bearing ring W3 with an edge provided with a rising edge W3a on the outer side of the bottom W3b and a rising edge W3c on the inner side. It is related with the induction heating coil which heats. The induction heating coil 21 forms a coil by notching a part of the annular conductor 22 and providing a lead portion 23 at the notch. The plan view is the same as FIG. The annular conductor 22 of the heating coil 21 includes an outer edge corresponding annular portion 22a having a plane corresponding to the upper surface of the outer edge W3a of the workpiece W3, a bottom corresponding annular portion 22b having a plane corresponding to the surface of the bottom W3b, and an inner edge W3c. A stepped plate-like annular body composed of an inner edge corresponding annular portion 22c having a plane corresponding to the upper surface of the inner edge. The intervals G31 and G34 between the planes of the inner and outer edge corresponding annular portions 22a and 22c and the inner and outer edges W3a and W3c, and the intervals G33 between the plane of the bottom corresponding annular portion 22b and the bottom W3b plane become predetermined values. Height is determined. The outer diameter D31 of the annular conductor 22 is larger than the outer diameter d31 of the workpiece W. On the other hand, the inner diameter D32 of the annular conductor 22 is equal to or larger than the inner diameter d32 of the workpiece W2. As a result, the difference in temperature rise due to the difference in heat capacity between the inner and outer peripheral sides of the work W3 is covered, and the inner and outer circumferences of the work W3 are uniformly heated and heated.

本発明の加熱コイルを使用して加熱焼入れした結果も、数値は省略するが第１、第２実施形態と同様に底部も縁部も均一な焼入れ硬さが得られた。   As for the result of heating and quenching using the heating coil of the present invention, although the numerical values are omitted, uniform quenching hardness is obtained at the bottom and the edge as in the first and second embodiments.

以上述べたように本発明の縁付スラスト軸受軌道輪の誘導加熱コイル及び加熱方法によれば、縁付スラスト軸受軌道輪の縁部も底部も均一に加熱できるので、焼入れの際に均一硬さが得られ、熱処理の原価を低減し産業の発展に寄与する。 As described above, according to the induction heating coil and the heating method of the edge thrust bearing raceway of the present invention, the edge and bottom of the edge thrust bearing raceway can be heated uniformly. This contributes to industrial development by reducing the cost of heat treatment.

本発明第１実施形態の外側縁付スラスト軸受軌道輪の誘導加熱コイルの断面図である。It is sectional drawing of the induction heating coil of the thrust bearing raceway with an outer edge of 1st Embodiment of this invention. 図１の平面図である。It is a top view of FIG. 本発明第２実施形態の内側縁付スラスト軸受軌道輪の誘導加熱コイルの断面図である。It is sectional drawing of the induction heating coil of the thrust bearing raceway with an inner edge of 2nd Embodiment of this invention. 本発明第３実施形態の内外側縁付スラスト軸受軌道輪の誘導加熱コイルの断面図である。It is sectional drawing of the induction heating coil of the thrust bearing raceway with inner and outer edges of 3rd Embodiment of this invention. 従来の環状加熱コイルの断面図である。It is sectional drawing of the conventional annular heating coil. 縁付軌道輪を有するスラスト軸受の斜視図である。It is a perspective view of the thrust bearing which has a bearing ring with an edge.

１、１１、２１ 加熱コイル、２、１２、２２ 環状導体、３ リード部、４ 平板環状コイル、５ 環状導体、Ｗ１，Ｗ２，Ｗ３ ワーク（縁付スラスト軸受） 1, 11, 21 Heating coil 2, 12, 22 Annular conductor, 3 Lead part, 4 Flat annular coil, 5 Annular conductor, W1, W2, W3 Workpiece (Thrust bearing with edge)

Claims (4)

環状の底部の外周に円縁部が立上げて形成された縁付スラスト軸受軌道輪を誘導加熱する加熱コイルにおいて、前記縁部上面と所定間隔をもって対応する環状平面を有する縁対応環状部と、前記底部平面と所定間隔をもって対応する環状平面を有する底対応環状部とが設けられた段付き板状環状導体からなり、前記縁対応環状部の外径が被加熱縁付スラスト軸受軌道輪の外径より大きく、前記底対応環状部の内径が被加熱縁付スラスト軸受軌道輪の内径と等しいか又はそれより大きく、かつ底対応環状部の段の外周が被加熱縁付スラスト軸受軌道輪の縁部内周と所定間隔で対応する径を有し、縁部立上がりの片面から加熱することを特徴とする縁付スラスト軸受軌道輪の誘導加熱コイル。 In a heating coil for induction heating an edged thrust bearing race formed by raising a circular edge on the outer periphery of the annular bottom part, an edge corresponding annular part having an annular plane corresponding to the upper surface of the edge with a predetermined interval; It comprises a stepped plate-like annular conductor provided with a bottom-corresponding annular part having an annular flat surface corresponding to the bottom plane with a predetermined interval, and the outer diameter of the edge-corresponding annular part is outside the thrust bearing raceway to be heated. Larger than the diameter, and the inner diameter of the bottom corresponding annular portion is equal to or larger than the inner diameter of the thrust bearing race ring to be heated, and the outer circumference of the step of the bottom corresponding annular portion is the edge of the thrust bearing race ring to be heated. An induction heating coil for a ring bearing with an edge thrust bearing, having a diameter corresponding to the inner circumference of the section at a predetermined interval and heating from one side of the edge rising. 環状の底部の内周に円縁部が立上げて形成された縁付スラスト軸受軌道輪を誘導加熱する加熱コイルにおいて、前記縁部上面と所定間隔をもって対応する環状平面を有する縁対応環状部と、前記底部平面と所定間隔をもって対応する環状平面を有する底対応環状部とが設けられた段付き板状環状導体からなり、前記底対応環状部の外径が被加熱縁付スラスト軸受軌道輪の外径より大きく、前記縁対応環状部の内径が被加熱縁付スラスト軸受軌道輪の内径と等しいか又はそれより大きく、かつ底対応環状部の段の内周が被加熱縁付スラスト軸受軌道輪の縁部外周と所定間隔で対応する径を有し、縁部立上がりの片面から加熱することを特徴とする縁付スラスト軸受軌道輪の誘導加熱コイル。 In a heating coil for inductively heating an edged thrust bearing race formed by raising a circular edge on the inner periphery of an annular bottom, an edge-corresponding annular part having an annular plane corresponding to the upper surface of the edge with a predetermined interval; A bottom plate-like annular conductor provided with a bottom-corresponding annular portion having an annular plane corresponding to the bottom plane with a predetermined interval, and the outer diameter of the bottom-corresponding annular portion of the thrust bearing ring with a heated edge Thrust bearing bearing ring with a heated edge, the inner diameter of the edge-supported annular part being equal to or larger than the inner diameter of the heated edge-equipped thrust bearing raceway An induction heating coil for a thrust bearing ring with a rim having a diameter corresponding to an outer periphery of the rim and heated from one side of the rim rising. 環状の底部の内周と外周とに円縁部が立上げて形成された縁付スラスト軸受軌道輪を誘導加熱する加熱コイルにおいて、前記内周縁部上面と所定間隔をもって対応する環状平面を有する内縁対応環状部と、前記外周縁部上面と所定間隔をもって対応する環状平面を有する外縁対応環状部と、前記底部平面と所定間隔をもって対応する環状平面を有する底対応環状部とが設けられた段付き板状環状導体からなり、前記外縁対応環状部の外径が被加熱縁付スラスト軸受軌道輪の外径より大きく、前記内縁対応環状部の内径が被加熱縁付スラスト軸受軌道輪の内径と等しいか又はそれより大きく、かつ底対応環状部の段の内周が被加熱縁付スラスト軸受軌道輪の内周縁部の外周と所定間隔で対応し、段の外周が被加熱縁付スラスト軸受軌道輪の外周縁部の内周と所定間隔で対応する径を有し、縁部立上がりの片面から加熱することを特徴とする縁付スラスト軸受軌道輪の誘導加熱コイル。 A heating coil for inductively heating an edged thrust bearing ring formed by raising a circular edge on the inner periphery and the outer periphery of an annular bottom, and an inner edge having an annular plane corresponding to the upper surface of the inner peripheral edge with a predetermined interval A stepped portion provided with a corresponding annular portion, an outer edge corresponding annular portion having an annular plane corresponding to the upper surface of the outer peripheral edge portion with a predetermined interval, and a bottom corresponding annular portion having an annular plane corresponding to the bottom portion plane with a predetermined interval. It consists of a plate-shaped annular conductor, and the outer edge-corresponding annular part has an outer diameter larger than the outer diameter of the heated edge-equipped thrust bearing raceway, and the inner edge-corresponding annular part has the same inner diameter as the heated edge-provided thrust bearing raceway Or larger and the inner periphery of the step of the bottom corresponding annular portion corresponds to the outer periphery of the inner peripheral edge of the heated edge-equipped thrust bearing raceway at a predetermined interval, and the outer periphery of the step is the heated edge-equipped thrust bearing raceway Outer circumference Has a corresponding diameter with an inner periphery and a predetermined distance parts, edge rise of the induction heating coil of the thrust bearing ring with edges, characterized in that heating from one side. 前記請求項１から３のいずれかに記載の誘導加熱コイルを被加熱縁付スラスト軸受軌道輪の立上がり縁側の平面に対応させて縁付スラスト軸受軌道輪を片面から加熱することを特徴とする縁付スラスト軸受軌道輪の誘導加熱方法。 The edge-heated thrust bearing raceway is heated from one side by causing the induction heating coil according to any one of claims 1 to 3 to correspond to a plane on the rising edge side of the heated edge-bearing thrust bearing raceway. Induction heating method for thrust bearing bearing ring.
JP2005245470A 2005-08-26 2005-08-26 Induction heating coil and heating method for rimmed thrust bearing race Expired - Fee Related JP5034019B2 (en)

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