JP5126526B2 - Induction heating coil - Google Patents
Induction heating coil Download PDFInfo
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- JP5126526B2 JP5126526B2 JP2008185402A JP2008185402A JP5126526B2 JP 5126526 B2 JP5126526 B2 JP 5126526B2 JP 2008185402 A JP2008185402 A JP 2008185402A JP 2008185402 A JP2008185402 A JP 2008185402A JP 5126526 B2 JP5126526 B2 JP 5126526B2
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Description
本発明は、ワークの複雑形状の端面を表面硬化処理するための高周波誘導加熱用のコイル（以下、誘導加熱コイルと言う）に関するものである。 The present invention relates to a high-frequency induction heating coil (hereinafter referred to as induction heating coil) for subjecting a complex-shaped end face of a workpiece to surface hardening treatment.
従来、自動車の駆動機構には、図４に示す金属製のダイヤフラムスプリング（以下、ワークと言う場合がある）５０が利用されている。この種のダイヤフラムスプリング５０にあっては、耐摩耗性を高めるために表面に硬化処理を施すことが望ましい。
一般に、自動車のボディなどの構造部品は、高周波加熱によってその表面に硬化処理が施される。
Conventionally, a metal diaphragm spring (hereinafter also referred to as a workpiece) 50 shown in FIG. 4 is used for a drive mechanism of an automobile. In this type of diaphragm spring 50, it is desirable that the surface be subjected to a curing treatment in order to enhance wear resistance.
In general, a structural part such as an automobile body is subjected to curing treatment on the surface thereof by high-frequency heating.
特許文献１には、所定の幅を有し孔や溝が穿設されている環状の被加熱面を誘導加熱するための高周波加熱コイル体が開示されている。
しかし、ダイヤフラムスプリング５０は、図４に示すように、円形の外周縁５０Ａを有する表面に、外周縁５０Ａの円と同心で外周縁５０Ａより小さい径の円形の内周縁５０Ｂによって画成された開口部５１と、内周縁５０Ｂから外周縁５０Ａへ半径方向に沿って内周縁５０Ｂと外周縁５０Ａとの間まで延出していて外周縁５０Ａ及び内周縁５０Ｂの中心５０Ｃまわりに等角度間隔に設けられた複数の切欠部５２と、を有している。
さらに、切欠部５２として、第１切欠部５２Ａとこれよりも幅狭の第２切欠部５２Ｂとが交互に並んでいる。隣り合う第１切欠部５２Ａと第２切欠部５２Ｂとの間は、半径方向に長手で細幅の第１領域Ｓ１として形成されており、各第１領域Ｓ１は、第１切欠部５２Ａ及び第２切欠部５２Ｂの外側の端部から外周縁５０Ａまで広がったリング状の第２領域Ｓ２に連続している。図４では、第１領域Ｓ１にシングルハッチングを付し、第２領域Ｓ２にダブルハッチングを付して表している。
また、第１切欠部５２Ａ同士は、図４に示すように、二つの第１切欠部５２Ａ，５２Ａの真ん中を通る仮想線Ｘ，Ｘ’が６０°の角度を成すように形成されている。同様に、第２切欠部５２Ｂ同士は、図４に示すように、二つの第２切欠部５２Ｂ，５２Ｂの真ん中を通る仮想線Ｙ，Ｙ’が６０°の角度を成すように形成されている。
さらに、ダイヤフラムスプリング５０は、外周縁５０Ａから外側へ突出していて、中心５０Ｃまわりに等角度間隔に設けられた複数の凸部５３を有する。
このように、ダイヤフラムスプリング５０の表面は複雑に形成されている。
However, as shown in FIG. 4, the diaphragm spring 50 has an opening defined on a surface having a circular outer peripheral edge 50A by a circular inner peripheral edge 50B concentric with the circle of the outer peripheral edge 50A and having a diameter smaller than the outer peripheral edge 50A. The portion 51 extends from the inner periphery 50B to the outer periphery 50A in the radial direction between the inner periphery 50B and the outer periphery 50A, and is provided at equal angular intervals around the center 50C of the outer periphery 50A and the inner periphery 50B. And a plurality of notches 52.
Furthermore, as the notch 52, the first notch 52A and the second notch 52B having a narrower width are alternately arranged. The first notch 52A and the second notch 52B adjacent to each other are formed as a first region S1 that is long and narrow in the radial direction, and each first region S1 includes the first notch 52A and the first notch 52A. It continues to the ring-shaped second region S2 extending from the outer end of the two notches 52B to the outer peripheral edge 50A. In FIG. 4, the first region S1 is indicated by single hatching, and the second region S2 is indicated by double hatching.
Further, as shown in FIG. 4, the first notches 52A are formed such that virtual lines X and X ′ passing through the middle of the two first notches 52A and 52A form an angle of 60 °. Similarly, as shown in FIG. 4, the second notches 52B are formed such that virtual lines Y and Y ′ passing through the middle of the two second notches 52B and 52B form an angle of 60 °. .
Furthermore, the diaphragm spring 50 protrudes outward from the outer peripheral edge 50A, and has a plurality of convex portions 53 provided at equal angular intervals around the center 50C.
Thus, the surface of the diaphragm spring 50 is formed in a complicated manner.
この種の複雑形状の平板ワーク５０の表面を加熱するための高周波誘導加熱用のコイルは、複雑形状を有さない円盤状のワーク（図示省略）の表面を加熱するための高周波誘導加熱コイルをそのまま利用することはできない。
そこで、本発明者らは、この種の複雑形状の平板ワーク５０の表面を加熱するための高周波誘導加熱用のコイルとして様々なタイプのコイルを設計し、シミュレーションによって当該コイル表面の温度等を確認した。
以下、本発明者らが試作したコイルの一例、即ち第１〜第５の試作品について説明する。
A high-frequency induction heating coil for heating the surface of this kind of complex-shaped flat work 50 is a high-frequency induction heating coil for heating the surface of a disk-shaped work (not shown) having no complicated shape. It cannot be used as it is.
Therefore, the present inventors designed various types of coils as high-frequency induction heating coils for heating the surface of this type of complex shaped flat workpiece 50, and confirmed the temperature of the coil surface by simulation. did.
Hereinafter, an example of the coil that the inventors made as a prototype, that is, first to fifth prototypes will be described.
〔第１の試作品について〕
図５に示す高周波誘導加熱用のコイル１００は、大径の第１コイル部１０１と、この第１コイル部１０１の内側に配設される小径の第２コイル部１０２と、を備えている。これらの第１コイル部１０１及び第２コイル部１０２は、断面が四角型に形成された金属でなる筒状部材である。第１コイル部の幅Ｗ４は第２コイルの幅Ｗ５よりも広く、高さＨ１も第２コイルの高さＨ２より高くなるように寸法が選定されている。
第１コイル部１０１は、その底面がダイヤフラムスプリング５０の外周縁５０Ａの内側から外側に亘る領域を覆うように配設され、第２コイル部１０２は、その底面がダイヤフラムスプリング５０の内周縁５０Ｂの内側から外側に亘る領域を覆うように配設されている。
しかし、このように設計したコイル１００をシミュレーションによってダイヤフラムスプリング５０の加熱される表面の温度を確認したところ、表面全体にむらなく加熱することはできないことが判明した。
[About the first prototype]
A coil 100 for high-frequency induction heating shown in FIG. 5 includes a first coil portion 101 having a large diameter and a second coil portion 102 having a small diameter disposed inside the first coil portion 101. The first coil portion 101 and the second coil portion 102 are cylindrical members made of metal having a square cross section. The width W4 of the first coil portion is wider than the width W5 of the second coil, and the dimensions are selected so that the height H1 is also higher than the height H2 of the second coil.
The first coil portion 101 is disposed so that the bottom surface covers an area extending from the inside to the outside of the outer peripheral edge 50A of the diaphragm spring 50, and the second coil portion 102 has a bottom surface that is the inner peripheral edge 50B of the diaphragm spring 50. It arrange | positions so that the area | region ranging from an inner side to an outer side may be covered.
However, when the temperature of the heated surface of the diaphragm spring 50 was confirmed by simulation for the coil 100 designed in this way, it was found that the entire surface could not be heated uniformly.
〔第２の試作品について〕
図６に示す高周波誘導加熱用のコイル１１０は、３つの扇状コイル部１１１Ａ〜１１１Ｃを中心５０Ｃまわりに等角度間隔に連成して構成されている。
各扇状コイル部１１１Ａ〜１１１Ｃは、ダイヤフラムスプリング５０の中心５０Ｃの傍らの位置から半径方向に沿ってダイヤフラムスプリング５０の外周縁５０Ａ側へ延出していて所定の角度で開いた二つの径方向部１１２Ａ，１１２Ｂと、これらの径方向部１１２Ａ，１１２Ｂの外周縁５０Ａ側の端部を連結する円弧部１１２Ｃと、からなる。各扇状コイル部１１１Ａ〜１１１Ｃは、一方の径方向部１１２Ａ（１１２Ｂ）における中心５０Ｃ側の端部を連結部１１３を介して隣り合う扇状コイルの隣接側の径方向部１１２Ｂ（１１２Ａ）における中心側の端部に連結されている。
円弧部１１２Ｃは、その底面がダイヤフラムスプリング５０の外周縁５０Ａの内側から外側に亘る領域を覆うように配設されている。
しかし、このように設計したコイル１１０をシミュレーションによってダイヤフラムスプリングの加熱される表面の温度を確認したところ、表面全体にむらなく加熱することができないことが判明した。
[About the second prototype]
The high frequency induction heating coil 110 shown in FIG. 6 is configured by connecting three fan coil portions 111A to 111C at equal angular intervals around the center 50C.
Each of the fan-shaped coil portions 111A to 111C extends from the position near the center 50C of the diaphragm spring 50 to the outer peripheral edge 50A side of the diaphragm spring 50 along the radial direction and opens at two predetermined radial portions 112A. 112B and a circular arc portion 112C that connects the end portions on the outer peripheral edge 50A side of these radial direction portions 112A and 112B. Each of the fan-shaped coil portions 111 </ b> A to 111 </ b> C has a central side in the radial direction portion 112 </ b> B (112 </ b> A) on the adjacent side of the fan coil adjacent to the end portion on the center 50 </ b> C side in one radial direction portion 112 </ b> A (112 </ b> B) via the connecting portion 113. It is connected to the end of the.
The arc portion 112 </ b> C is disposed so that its bottom surface covers a region extending from the inside to the outside of the outer peripheral edge 50 </ b> A of the diaphragm spring 50.
However, when the temperature of the heated surface of the diaphragm spring was confirmed by simulation for the coil 110 designed in this way, it was found that the entire surface could not be heated uniformly.
〔第３の試作品について〕
図７に示す高周波誘導加熱用のコイル１２０は、３つの扇状コイル部１１１Ａ〜１１１Ｃを中心５０Ｃまわりに等角度間隔に連成して構成されている点で図６のコイル１１０と同じであるが、さらに、各径方向部１１２Ａ，１１２Ｂが、その長手方向における中間部に磁性体１２１Ａ，１２１Ｂを巻回するように設計した。
しかし、このように設計したコイル１２０をシミュレーションによってダイヤフラムスプリング５０の加熱される表面の温度を確認したところ、表面全体にむらなく加熱することができないことが判明した。
[About the third prototype]
The high-frequency induction heating coil 120 shown in FIG. 7 is the same as the coil 110 shown in FIG. 6 in that the three fan-shaped coil portions 111A to 111C are connected at equal angular intervals around the center 50C. Furthermore, each of the radial direction portions 112A and 112B is designed to wind the magnetic bodies 121A and 121B around an intermediate portion in the longitudinal direction.
However, when the temperature of the heated surface of the diaphragm spring 50 was confirmed by simulation for the coil 120 designed in this way, it was found that the entire surface could not be heated uniformly.
〔第４の試作品について〕
図８に示す高周波誘導加熱用のコイル１３０は、３つの扇状コイル部１１１Ａ〜１１１Ｃを中心５０Ｃまわりに等角度間隔に連成して構成されている点で図６のコイル１１０と同じであるが、図６のコイル１１０に比して各径方向部１１２Ａ，１１２Ｂが短く形成されている。
具体的には、各円弧部１１２Ｃが、切欠部５２の半径方向外側の端部から外周縁５０Ａへ亘る中間領域でダイヤフラムスプリング５０と同心で、外周縁の円より半径の小さい第１の仮想円ａ’上に沿うように配設されていることを特徴としている。ここで、第１の仮想円ａ’の半径は、切欠部５２の半径方向外側の端部と外周縁５０Ａとの中間位置から中心５０Ｃまでの長さに設定されている。
しかし、このように設計したコイル１３０をシミュレーションによってダイヤフラムスプリング５０の加熱される表面の温度を確認したところ、表面全体にむらなく加熱することができないことが判明した。特に、ダイヤフラムスプリング５０の外周縁５０Ａに形成された各凸部５３に対する加熱が十分でなかった。
[About the fourth prototype]
The high-frequency induction heating coil 130 shown in FIG. 8 is the same as the coil 110 shown in FIG. 6 in that the three fan-shaped coil portions 111A to 111C are connected at equal angular intervals around the center 50C. Each radial direction part 112A, 112B is formed short compared with the coil 110 of FIG.
Specifically, each arc portion 112C is concentric with the diaphragm spring 50 in the intermediate region from the radially outer end of the notch 52 to the outer peripheral edge 50A, and has a first virtual circle having a smaller radius than the outer peripheral circle. It is characterized by being arranged along a '. Here, the radius of the first virtual circle a ′ is set to a length from an intermediate position between the radially outer end of the notch 52 and the outer peripheral edge 50A to the center 50C.
However, when the temperature of the heated surface of the diaphragm spring 50 was confirmed by simulation for the coil 130 designed in this way, it was found that the entire surface could not be heated uniformly. In particular, the heating of the convex portions 53 formed on the outer peripheral edge 50A of the diaphragm spring 50 was not sufficient.
〔第５の試作品について〕
図９に示す高周波誘導加熱用のコイル１４０は、３つの扇状コイル部１１１Ａ〜１１１Ｃを中心５０Ｃまわりに等角度間隔に連成して構成した点で図６のコイル１１０と同じであるが、図６のコイル１１０に比して、各径方向部１１２Ａ，１１２Ｂを長く形成した。具体的には、各円弧部１１２Ｃが前記凸部を覆うように、上記第１の仮想円ａ’よりも半径の大きい第２の仮想円ｂ’上に沿うように配設されていることを特徴としている。
しかし、このように設計したコイル１４０をシミュレーションによってダイヤフラムスプリング５０の加熱される表面の温度を確認したところ、表面全体にむらなく加熱することができないことが判明した。特に、切欠部５２の半径方向外側の端部と外周縁５０Ａとの中間領域、即ち前述の第２領域Ｓ２に対する加熱が十分でなかった。
[About the fifth prototype]
The high frequency induction heating coil 140 shown in FIG. 9 is the same as the coil 110 of FIG. 6 in that the three fan-like coil portions 111A to 111C are connected at equal angular intervals around the center 50C. Each radial portion 112A, 112B is formed longer than the six coils 110. Specifically, each arc portion 112C is arranged so as to be along the second virtual circle b ′ having a radius larger than that of the first virtual circle a ′ so as to cover the convex portion. It is a feature.
However, when the temperature of the heated surface of the diaphragm spring 50 was confirmed by simulation for the coil 140 designed in this way, it was found that the entire surface could not be heated uniformly. In particular, the heating of the intermediate region between the radially outer end of the notch 52 and the outer peripheral edge 50A, that is, the aforementioned second region S2 was not sufficient.
このような設計変更を繰り返した結果、本発明者らは、図４に示すダイヤフラムスプリングに適したコイルを創作することができた。
そこで、本発明は、端面に複雑形状を有する被加熱部材を効率的に高周波誘導加熱するためのコイルを提供することを目的とする。
As a result of repeating such design changes, the present inventors have been able to create a coil suitable for the diaphragm spring shown in FIG.
Then, an object of this invention is to provide the coil for carrying out the high frequency induction heating of the to-be-heated member which has a complicated shape in an end surface.
上記目的を達成するため、本発明は、円形の外周縁を有する端面にこの円形と同心でこの円形より小さい径を有する円形の内周縁によって画成された開口部と、上記内周縁から外周縁へ半径方向に沿って内周縁と外周縁との間まで延出していて円形の中心まわりに等角度間隔に設けられた複数の切欠部と、を有すると共に、外周縁から外側へ突出していて円形の中心まわりに等角度間隔に設けられた複数の凸部と、を有する被加熱部材を加熱するための誘導加熱コイルであって、二つの第１扇状コイル部と一つの第２扇状コイル部とが連なっていて、第１扇状コイル部は、上記中心の傍らの位置から半径方向に沿って外周縁側へ延出していて所定の角度で開いた二つの第１径方向部と、これらの第１径方向部の外周縁側の端部を連結する弧状の第１円弧部と、から成り、第２扇状コイル部は、中心の傍らの位置から半径方向に沿って外周縁側へ延出していて所定の角度で開いた二つの第２径方向部と、これらの第２径方向部の外周縁側の端部を連結する弧状の第２円弧部と、から成り、第１円弧部は、切欠部の半径方向外側の端部から外周縁までに亘る中間領域で円形と同心の第１の仮想円に沿うように配設され、第２円弧部は凸部を覆うように第１の仮想円よりも半径の大きい第２の仮想円に沿うように配設されていることを特徴としている。 In order to achieve the above object, the present invention provides an opening defined by a circular inner peripheral edge having a smaller diameter than a concentric circle and a circular concentric end face on an end surface having a circular outer peripheral edge. A plurality of notches extending at an equiangular interval around the center of the circle and extending outward from the outer periphery to the outside and extending circularly from the outer periphery to the outer periphery An induction heating coil for heating a member to be heated having a plurality of convex portions provided at equiangular intervals around the center of each of the first fan coil portion and one second fan coil portion. The first fan coil portion extends from the position near the center to the outer peripheral edge side along the radial direction and opens at a predetermined angle, and these first radial portions An arc shape that connects the ends on the outer peripheral edge side of the radial direction part A second arcuate coil portion, which extends from the position near the center to the outer peripheral edge side along the radial direction and opens at a predetermined angle; and An arc-shaped second arc portion that connects ends of the second radial direction portions on the outer peripheral edge side, and the first arc portion is an intermediate region extending from the radially outer end portion to the outer peripheral edge of the notch portion. The second circular arc portion is arranged along a second virtual circle having a radius larger than that of the first virtual circle so as to cover the convex portion. It is characterized by having.
本発明の誘導加熱コイルにおいて、好ましくは、二つの第２径方向部が成す角度は、二つの第１径方向部が成す角度よりも大きいことを特徴としている。
さらに、本発明の誘導加熱コイルは、各第１扇状コイル部における二つの第１径方向が成す角度（θ１）が７５°、第２扇状コイル部における二つの第２径方向が成す角度（θ３）が９０°、第２扇状コイル部の両側にそれぞれ配置される第１扇状コイル部と当該第２扇状コイル部とにおける第１径方向とそれに隣り合う第２径方向とが成す角度（θ４）が３０°、一方の第１扇状コイル部における他方の第１扇状コイル部側の第１径方向部とこの第１径方向部と隣り合う他方の第１扇状コイル部における第１径方向部とが成す角度（θ２）が６０°、に設定されていて、外部からコイル内に水を供給するための給水管が一方の第１扇状コイル部の第１径方向部における端部に連結され、コイル内の水を排出するための排水管が他方の第１扇状コイル部の第１径方向部の端部に連結されていることを特徴としている。
In the induction heating coil according to the present invention, preferably, the angle formed by the two second radial portions is larger than the angle formed by the two first radial portions.
Furthermore, in the induction heating coil of the present invention, the angle (θ1) formed by the two first radial directions in each first fan coil portion is 75 °, and the angle (θ3) formed by the two second radial directions in the second fan coil portion. ) Is 90 °, an angle (θ4) formed by a first radial coil portion and a second radial direction adjacent to the first fan coil portion and the second fan coil portion respectively disposed on both sides of the second fan coil portion. 30 °, the first radial direction portion of the other first fan coil portion adjacent to the first radial direction portion and the first radial direction portion on the other first fan coil portion side of one first fan coil portion, The angle (θ2) formed by is set to 60 °, and a water supply pipe for supplying water into the coil from the outside is connected to an end of the first radial coil portion of one of the first fan coil portions, The drain pipe for discharging the water in the coil is the other first fan-shaped carp It is connected with the edge part of the 1st radial direction part of a lug part, It is characterized by the above-mentioned.
本発明によれば、三つの扇型のコイル部材、即ち二つの第１扇状コイル部及び一つの第２扇状コイル部を連結し、その内の一つのコイル部材、すなわち第２扇状コイル部が加熱する領域を他のコイル部材による加熱領域と部分的にずらしている。したがって、本発明のコイルによれば、ダイヤフラムスプリング５０の表面全体をむらなく加熱できる。よって、本コイルによれば、複雑形状を円形の表面に有する薄板を十分に表面加工処理することができる。 According to the present invention, three fan-shaped coil members, that is, two first fan-shaped coil portions and one second fan-shaped coil portion are connected, and one of the coil members, that is, the second fan-shaped coil portion is heated. The region to be performed is partially shifted from the heating region by other coil members. Therefore, according to the coil of the present invention, the entire surface of the diaphragm spring 50 can be heated evenly. Therefore, according to this coil, it is possible to sufficiently surface-treat a thin plate having a complicated shape on a circular surface.
以下、図面に基づいて本発明の実施形態を説明するが、背景技術で説明した部材と同一の部材については、同じ符号を付してその説明は省略する。
図１は本発明の実施形態に係る高周波誘導加熱用のコイル１の平面図であり、図２は図４のダイヤフラムスプリング５０に対して図１のコイル１を配置した状態を示す図である。
本実施形態におけるダイヤフラムスプリング５０の寸法は、外周縁を成す円の半径Ｒ１（図４参照）が５５ｍｍであり、内周縁を成す円の半径Ｒ２（図４参照）が１３ｍｍである。
Hereinafter, embodiments of the present invention will be described with reference to the drawings, but the same members as those described in the background art will be denoted by the same reference numerals, and the description thereof will be omitted.
FIG. 1 is a plan view of a high frequency induction heating coil 1 according to an embodiment of the present invention, and FIG. 2 is a view showing a state in which the coil 1 of FIG. 1 is arranged with respect to the diaphragm spring 50 of FIG.
In the present embodiment, the diaphragm spring 50 has a radius R1 (see FIG. 4) of the circle forming the outer peripheral edge of 55 mm and a radius R2 (see FIG. 4) of the circle forming the inner peripheral edge of 13 mm.
コイル１は、一本の断面四角形の筒状部を屈曲形成させたように、二つの第１扇状コイル部１０Ａ，１０Ｂと、一つの第２扇状コイル部２０と、が連なって構成されている。
各第１扇状コイル部１０Ａ，１０Ｂは、ダイヤフラムスプリングの中心５０Ｃから所定距離隔てた傍らの位置から半径方向に沿ってダイヤフラムスプリング５０の外周縁５０Ａ側へ延出していて所定の角度で開いた二つの第１径方向部１１Ａ，１１Ｂと、これらの第１径方向部１１Ａ，１１Ｂの外周縁側の端部を連結する弧状の第１円弧部１１Ｃと、から成る。ここで、ダイヤフラムスプリング５０の中心５０Ｃの傍らとは、中心５０Ｃから例えば半径１０〜４０ｍｍの円内の領域を言う。
第１径方向部１１Ａ，１１Ｂ及び第１円弧部１１Ｃの幅、即ちコイル１を成す角筒の幅Ｗ１は、ダイヤフラムスプリングにおける隣り合う第１切欠部５２Ａと第２切欠部５２Ｂとの幅Ｗ２程度に、例えば８ｍｍに設定されている。
二つの第１径方向部１１Ａ，１１Ｂが成す角度θ１は、図示の場合、７５°であるが、４５°〜１０５°であってもよい。角度θ１及び後述する角度θ２〜θ４は、第１径方向部等の半径方向に延びる部材を成す角筒の幅方向における中間を通る線を基準としたものである。
第１円弧部１１Ｃは、切欠部５２の半径方向外側の端部から外周縁までの中間領域、即ち第２領域Ｓ２（図４のダブルハッチングで示す領域）でダイヤフラムスプリング５０と同心の第１の仮想円Ｃ１（図１参照）上に沿うように配設されている。図示例の場合、第１の仮想円Ｃ１の半径は４５ｍｍであり、第１円弧部１１Ｃの内側の縁１１Ｄが第１の仮想円Ｃ１に沿うように形成されている。
二つの第１扇状コイル部１０Ａ，１０Ｂは、図示のように、一方の第１扇状コイル部１０Ａにおける他方の第１扇状コイル部１０Ｂ側の第１径方向部１１Ａと、この第１径方向部１１Ａと隣り合う他方の第１扇状コイル部１０Ｂにおける第１径方向部１１Ｂとが成す角度θ２が６０°になるように配設されている。第１扇状コイル部１０Ａの第１径方向部１１Ａにおける中心５０Ｃ側の端部には、外部からコイル１内に水を供給するための給水管４１が、他方の第１扇状コイル部１０Ｂの第１径方向部１１Ｂにおける中心５０Ｃ側の端部には、コイル１内の水を排出するための排水管４２が連結されている。これらの給水管４１、排水管４２は、コイル１と同様に、金属、例えば銅で構成されている。
The coil 1 is formed by connecting two first fan-shaped coil portions 10A and 10B and one second fan-shaped coil portion 20 so as to bend and form one cylindrical section having a quadrangular cross section. .
Each of the first fan coil portions 10A and 10B extends from the position at a predetermined distance from the center 50C of the diaphragm spring to the outer peripheral edge 50A side of the diaphragm spring 50 along the radial direction and opens at a predetermined angle. It consists of two first radial portions 11A and 11B, and an arcuate first arc portion 11C that connects the ends of the first peripheral portions 11A and 11B on the outer peripheral edge side. Here, the side of the center 50C of the diaphragm spring 50 refers to a region within a circle having a radius of 10 to 40 mm, for example, from the center 50C.
The widths of the first radial portions 11A and 11B and the first circular arc portion 11C, that is, the width W1 of the rectangular tube forming the coil 1, are about the width W2 between the adjacent first notch 52A and second notch 52B in the diaphragm spring. For example, it is set to 8 mm.
In the illustrated example, the angle θ1 formed by the two first radial portions 11A and 11B is 75 °, but may be 45 ° to 105 °. The angle θ1 and the angles θ2 to θ4 described later are based on a line passing through the middle in the width direction of the rectangular tube forming the member extending in the radial direction such as the first radial direction portion.
The first arc portion 11C is a first region concentric with the diaphragm spring 50 in an intermediate region from the radially outer end of the notch 52 to the outer peripheral edge, that is, a second region S2 (a region indicated by double hatching in FIG. 4). It arrange | positions along the virtual circle C1 (refer FIG. 1). In the case of the illustrated example, the radius of the first virtual circle C1 is 45 mm, and the inner edge 11D of the first arc portion 11C is formed along the first virtual circle C1.
As shown in the drawing, the two first fan coil portions 10A and 10B are composed of a first radial portion 11A on the side of the other first fan coil portion 10B in one first fan coil portion 10A and the first radial portion. 11A and the other first fan-shaped coil portion 10B adjacent to the first radial direction portion 11B are disposed so that an angle θ2 is 60 °. A water supply pipe 41 for supplying water into the coil 1 from the outside is provided at the end of the first radial coil portion 10A on the center 50C side in the first radial coil portion 10A. A drain pipe 42 for discharging the water in the coil 1 is connected to the end portion on the center 50C side in the one radial direction portion 11B. Similar to the coil 1, the water supply pipe 41 and the drain pipe 42 are made of metal, for example, copper.
第２扇状コイル部２０は、ダイヤフラムスプリングの中心５０Ｃの近傍の位置から半径方向に沿って外周縁５０Ａ側へ延出していて所定の角度で開いた二つの第２径方向部２１Ａ，２１Ｂと、これらの第２径方向部２１Ａ，２１Ｂの外周縁５０Ａ側の端部を連結する弧状の第２円弧部２１Ｃと、から成る。
二つの第２径方向部２１Ａ，２１Ｂが成す角度θ３は、図示の場合、９０°であるが、４５°〜１８０°であってもよい。
第２円弧部２１Ｃは、ダイヤフラムスプリング５０の凸部５３を覆うように、第１の仮想円Ｃ１よりも半径の大きい第２の仮想円Ｃ２上に沿うように配設されている。図示例の場合、第２の仮想円Ｃ２の半径は５５ｍｍであり、第２円弧部２１Ｃの内側の縁２１Ｄが第２の仮想円Ｃ２に沿うように形成されている。これにより、第２円弧部２１Ｃは、半径方向において第１円弧部１１Ｃよりも外側に配設されている。
第２扇状コイル部２０を成す角筒も、第１扇状コイル部１０Ａ，１０Ｂと同様に、例えば幅Ｗ３が８ｍｍに設定されている。
この第２扇状コイル部２０は、第２径方向部２１Ａ（２１Ｂ）とその隣の第１扇状コイル部１０Ａ（１０Ｂ）の第１径方向部１１Ｂ（１１Ａ）とで成す角度θ４が３０°となるように配設されている。第２径方向部２１Ａ（２１Ｂ）は、中心５０Ｃ側の端部を隣りの第１扇状コイル部１０Ａ（１０Ｂ）の第１径方向部１１Ｂ（１１Ａ）の中心５０Ｃ側の端部と、連結部３０Ａ（３０Ｂ）を介して連結している。
The second fan-shaped coil part 20 extends from the position in the vicinity of the center 50C of the diaphragm spring to the outer peripheral edge 50A side along the radial direction, and is opened at a predetermined angle, and the second second radial parts 21A and 21B. An arc-shaped second arc portion 21C that connects the end portions on the outer peripheral edge 50A side of these second radial direction portions 21A and 21B.
In the illustrated example, the angle θ3 formed by the two second radial direction portions 21A and 21B is 90 °, but may be 45 ° to 180 °.
The second arc portion 21 </ b> C is disposed along the second virtual circle C <b> 2 having a larger radius than the first virtual circle C <b> 1 so as to cover the convex portion 53 of the diaphragm spring 50. In the illustrated example, the radius of the second virtual circle C2 is 55 mm, and the inner edge 21D of the second arc portion 21C is formed along the second virtual circle C2. Thus, the second arc portion 21C is disposed on the outer side of the first arc portion 11C in the radial direction.
Similarly to the first fan-shaped coil portions 10A and 10B, the square tube forming the second fan-shaped coil portion 20 has a width W3 set to 8 mm, for example.
In this second fan-shaped coil part 20, the angle θ4 formed by the second radial part 21A (21B) and the first radial part 11B (11A) of the adjacent first fan-shaped coil part 10A (10B) is 30 °. It is arranged to become. The second radial portion 21A (21B) has an end on the center 50C side and an end on the center 50C side of the first radial direction portion 11B (11A) of the adjacent first fan coil portion 10A (10B), and a connecting portion. It is connected via 30A (30B).
二つの第１扇状コイル部１０Ａ，１０Ｂと一つの第２扇状コイル部２０とは、それらの内部が連通するように一体に構成されている。 The two first fan coil portions 10A and 10B and the one second fan coil portion 20 are integrally configured so that the insides thereof communicate with each other.
このように構成された本発明の実施形態に係るコイル１によってダイヤフラムスプリングを加熱した場合の作用について説明する。なお、コイル１は固定配置され、ダイヤフラムスプリング５０が中心５０Ｃまわりに所定の角速度で矢印Ａ（図２参照）方向へ回転する。
図３は、図２に示す状態でコイル１を通電してダイヤフラムスプリング５０を加熱した場合に、ダイヤフラムスプリング５０の表面において特に加熱された部分を斜線で強調して模式的に表した図である。
本実施形態に係るコイル１において、二つの第１扇状コイル部１０Ａ，１０Ｂによれば、図３に示すＡ１，Ａ２の斜線領域が集中的に加熱される。具体的には、第１扇状コイル部１０Ａ，１０Ｂの第１径方向部１１Ａ，１１Ｂによって、内周縁５０Ｂから半径方向に沿った第１領域Ｓ１、図示の場合、第２切欠部５２Ｂの長手方向に沿ってその両縁周辺が加熱された状態を示している。
また、第２領域Ｓ２では、第１扇状コイル部１０Ａ，１０Ｂの第１円弧部１１Ｃによって、第１切欠部５２Ａ及び第２切欠部５２Ｂの外側端部寄り部分が集中的に加熱されている。このように、第１円弧部１１Ｃによって加熱される第２領域Ｓ２における部分より外側、即ち半径方向外側が、別の斜線Ａ３で示すように、第２扇状コイル部２０の第２円弧部２１Ｃによって加熱される。また、第２扇状コイル部２０の第１径方向部２１Ａ，２１Ｂによっても、第１領域Ｓ１が加熱される。
そして、所定の速度でダイヤフラムスプリング５０が回転されることで、ダイヤフラムスプリング５０の表面はむらなく全体が十分に加熱される。
The operation when the diaphragm spring is heated by the coil 1 according to the embodiment of the present invention configured as described above will be described. The coil 1 is fixedly arranged, and the diaphragm spring 50 rotates in the direction of arrow A (see FIG. 2) around the center 50C at a predetermined angular velocity.
FIG. 3 is a diagram schematically showing a particularly heated portion on the surface of the diaphragm spring 50 with hatching, when the coil 1 is energized and the diaphragm spring 50 is heated in the state shown in FIG. .
In the coil 1 according to the present embodiment, according to the two first fan coil portions 10A and 10B, the hatched regions A1 and A2 shown in FIG. 3 are intensively heated. Specifically, by the first radial direction portions 11A and 11B of the first fan-shaped coil portions 10A and 10B, the first region S1 along the radial direction from the inner peripheral edge 50B, in the illustrated case, the longitudinal direction of the second notch portion 52B. A state in which the periphery of both edges is heated along is shown.
In the second region S2, the portions near the outer ends of the first cutout portion 52A and the second cutout portion 52B are intensively heated by the first arc portions 11C of the first fan coil portions 10A, 10B. As described above, the outer side of the portion in the second region S2 heated by the first arc portion 11C, that is, the outer side in the radial direction, is indicated by the second arc portion 21C of the second fan coil portion 20 as indicated by another oblique line A3. Heated. The first region S1 is also heated by the first radial direction portions 21A and 21B of the second fan coil portion 20.
Then, when the diaphragm spring 50 is rotated at a predetermined speed, the entire surface of the diaphragm spring 50 is sufficiently heated without unevenness.
このように、本実施形態に係るコイル１によれば、上記したように、三つの扇型のコイル部材、即ち第１扇状コイル部１０Ａ，１０Ｂ及び第２扇状コイル部２０を連結し、その内の一つのコイル部材、即ち第２扇状コイル部２０が加熱する領域を他のコイル部材による加熱領域と部分的にずらしている。この場合、第１扇状コイル部１０Ａ，１０Ｂの第１円弧部１１Ｃではカバーできない、第２領域Ｓ２におけるダイヤフラムスプリング５０の外周縁５０Ａ寄りの部分は、ダイヤフラムスプリング５０の中心５０Ｃから離れた箇所であり、第２領域Ｓ２における切欠部５２寄りの部分よりも外周縁５０Ａに沿っていて面積が広いため、第２円弧部２１Ｃは第１円弧部１１Ｃよりも長く設定されていて、当該第２領域Ｓ２におけるダイヤフラムスプリング５０の外周縁５０Ａ寄りの部分を十分に加熱できるように構成されている。
したがって、本発明に実施形態に係るコイル１によれば、ダイヤフラムスプリング５０の表面全体をむらなく加熱できる。よって、本コイル１によれば、複雑形状を円形の表面に有する薄板を十分に表面加工処理することが可能である。
Thus, according to the coil 1 according to the present embodiment, as described above, three fan-shaped coil members, that is, the first fan-shaped coil portions 10A and 10B and the second fan-shaped coil portion 20 are connected, One coil member, that is, the region heated by the second fan-shaped coil portion 20 is partially shifted from the heating region by other coil members. In this case, the portion near the outer peripheral edge 50A of the diaphragm spring 50 in the second region S2 that cannot be covered by the first arc portions 11C of the first fan coil portions 10A and 10B is a place away from the center 50C of the diaphragm spring 50. Since the area along the outer peripheral edge 50A is wider than the portion near the notch 52 in the second region S2, the second arc portion 21C is set longer than the first arc portion 11C, and the second region S2 The portion near the outer peripheral edge 50A of the diaphragm spring 50 is configured to be sufficiently heated.
Therefore, according to the coil 1 according to the embodiment of the present invention, the entire surface of the diaphragm spring 50 can be heated evenly. Therefore, according to the present coil 1, it is possible to sufficiently surface-treat a thin plate having a complicated shape on a circular surface.
本発明は上記実施の形態に限定されるものでなく、特許請求の範囲に記載された発明の要旨を逸脱しない範囲で種々の設計変更した形態を含むものである。
例えば、本発明のコイルによって誘導加熱処理を施すワークは、上記のダイヤフラムスプリング５０に限らず、図４に示す形状の端面を端部に有する筒状部材であってもよい。
本発明のコイルは、上記実施形態の数値に寸法や角度が限定されるものではない。たとえば、第２扇状コイル部における第２径方向部２１Ａ，２１Ｂが成す角度θ３は、第１扇状コイル部における第１径方向部１１Ａ，１１Ｂが成す角度θ１と同じであってもよい。
The present invention is not limited to the above-described embodiment, but includes various design changes without departing from the gist of the invention described in the claims.
For example, the workpiece subjected to the induction heating process using the coil of the present invention is not limited to the diaphragm spring 50 described above, but may be a cylindrical member having an end surface having the shape shown in FIG.
The coil of the present invention is not limited in size and angle to the numerical values in the above embodiment. For example, the angle θ3 formed by the second radial direction portions 21A and 21B in the second fan coil portion may be the same as the angle θ1 formed by the first radial direction portions 11A and 11B in the first fan coil portion.
１ コイル
１０Ａ，１０Ｂ 第１扇状コイル部
１１Ａ，１１Ｂ 第１径方向部
１１Ｃ 第１円弧部
１１Ｄ 縁
２０ 第２扇状コイル部
２１Ａ，２１Ｂ 第２径方向部
２１Ｃ 第２円弧部
２１Ｄ 縁
３０Ａ，３０ｂ 連結部
４１ 給水管
４２ 排水管
５０ ダイヤフラムスプリング（ワーク）
５０Ａ 外周縁
５０Ｂ 内周縁
５０Ｃ 中心
５１ 開口部
５２ 切欠部
５２Ａ 第１切欠部
５２Ｂ 第２切欠部
５３ 凸部
Ｃ１ 第１の仮想円
Ｃ２ 第２の仮想円
Ｒ１，Ｒ２ 半径
Ｓ１ 第１領域
Ｓ２ 第２領域
Ｗ１〜Ｗ５ 幅
θ１〜θ４ 角度
DESCRIPTION OF SYMBOLS 1 Coil 10A, 10B 1st fan-shaped coil part 11A, 11B 1st radial direction part 11C 1st circular arc part 11D Edge 20 2nd fan-shaped coil part 21A, 21B 2nd radial direction part 21C 2nd circular arc part 21D Edge 30A, 30b Connection Part 41 Water supply pipe 42 Drain pipe 50 Diaphragm spring (workpiece)
50A Outer periphery 50B Inner periphery 50C Center 51 Opening 52 Notch 52A First notch 52B Second notch 53 Convex C1 First imaginary circle C2 Second imaginary circle R1, R2 Radius S1 First region S2 Second Region W1-W5 Width θ1-θ4 Angle
Claims (5)
二つの第１扇状コイル部と一つの第２扇状コイル部とが連なっていて、
上記第１扇状コイル部は、上記中心の傍らの位置から上記半径方向に沿って上記外周縁側へ延出していて所定の角度で開いた二つの第１径方向部と、これらの第１径方向部の上記外周縁側の端部を連結する弧状の第１円弧部と、から成り、
上記第２扇状コイル部は、上記中心の傍らの位置から上記半径方向に沿って上記外周縁側へ延出していて所定の角度で開いた二つの第２径方向部と、これらの第２径方向部の上記外周縁側の端部を連結する弧状の第２円弧部と、から成り、
上記第１円弧部は、上記切欠部の半径方向外側の端部から上記外周縁までに亘る中間領域で上記円形と同心の第１の仮想円に沿うように配設され、
上記第２円弧部は、上記凸部を覆うように、上記第１の仮想円よりも半径の大きい第２の仮想円に沿うように配設されていることを特徴とする、誘導加熱コイル。 An opening defined by a circular inner peripheral edge concentric with the circle and having a smaller diameter than the circular shape on an end surface having a circular outer peripheral edge, and the inner peripheral edge along the radial direction from the inner peripheral edge to the outer peripheral edge And a plurality of notches provided at equiangular intervals around the center of the circle, and further projecting outward from the outer periphery and equiangular around the center of the circle An induction heating coil for heating a member to be heated having a plurality of convex portions provided at intervals,
Two first fan coil portions and one second fan coil portion are connected,
The first fan coil portion extends from the position near the center to the outer peripheral edge side along the radial direction and opens at a predetermined angle, and these first radial directions. An arc-shaped first arc portion connecting the end portions on the outer peripheral edge side of the portion,
The second fan coil portion extends from the position near the center to the outer peripheral edge side along the radial direction and opens at a predetermined angle, and these second radial directions. An arcuate second arc portion connecting the end portions of the outer peripheral edge side of the portion,
The first arc portion is arranged along a first virtual circle concentric with the circle in an intermediate region extending from the radially outer end of the notch to the outer peripheral edge,
The induction heating coil, wherein the second arc portion is disposed along a second virtual circle having a radius larger than that of the first virtual circle so as to cover the convex portion.
第２扇状コイル部における二つの第２径方向が成す角度（θ３）が９０°、
第２扇状コイル部の両側にそれぞれ配置される第１扇状コイル部と当該第２扇状コイル部とにおける第１径方向とそれに隣り合う第２径方向とが成す角度（θ４）が３０°、
一方の第１扇状コイル部における他方の第１扇状コイル部側の第１径方向部とこの第１径方向部と隣り合う他方の第１扇状コイル部における第１径方向部とが成す角度（θ２）が６０°、に設定されていて、
外部からコイル内に水を供給するための給水管が一方の第１扇状コイル部の第１径方向部における端部に連結され、コイル内の水を排出するための排水管が他方の第１扇状コイル部の第１径方向部の端部に連結されていることを特徴とする、請求項１又は２に記載の誘導加熱コイル。 An angle (θ1) formed by two first radial directions in each first sector coil portion is 75 °,
The angle (θ3) formed by the two second radial directions in the second fan coil portion is 90 °,
The angle (θ4) formed by the first radial direction and the second radial direction adjacent thereto in the first fan-shaped coil section and the second fan-shaped coil section respectively disposed on both sides of the second fan-shaped coil section is 30 °,
The angle formed by the first radial direction part of the other first fan coil part on the other first fan coil part side and the first radial direction part of the other first fan coil part adjacent to the first radial direction part ( θ2) is set to 60 °,
A water supply pipe for supplying water into the coil from the outside is connected to an end portion of the first radial coil portion of the first fan coil portion, and a drain pipe for discharging water in the coil is the other first. The induction heating coil according to claim 1, wherein the induction heating coil is connected to an end portion of the first radial direction portion of the fan-shaped coil portion.
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