JPH0971820A - Induction heater for annular ring - Google Patents
Induction heater for annular ringInfo
- Publication number
- JPH0971820A JPH0971820A JP7248239A JP24823995A JPH0971820A JP H0971820 A JPH0971820 A JP H0971820A JP 7248239 A JP7248239 A JP 7248239A JP 24823995 A JP24823995 A JP 24823995A JP H0971820 A JPH0971820 A JP H0971820A
- Authority
- JP
- Japan
- Prior art keywords
- annular ring
- induction heating
- heated
- holding member
- holding
- 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.)
- Pending
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
- General Induction Heating (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、環状リング、特に
薄肉環状リングの誘導焼入・焼戻しなどの加熱の際に、
被加熱体環状リングを保持する保持部材を備えた環状リ
ングの誘導加熱装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an annular ring, particularly a thin annular ring, for induction hardening / tempering or other heating.
The present invention relates to an induction heating device for an annular ring that includes a holding member that holds the annular ring to be heated.
【０００２】[0002]
【従来の技術】従来の巻線型誘導加熱コイルでは、環状
リング、特に薄型の環状リングの加熱の際にリング幅方
向の均一な加熱は困難であった。そこで出願人は、先に
特願平６−３３６６３４号において新しい環状リングの
誘導加熱装置を提案した。かかる誘導加熱装置において
は、被加熱体環状リングを平面の耐熱材の板などの上に
乗せるか、または平面の耐熱材の板などに挟んで誘導加
熱コイル中に保持して加熱する方法が行われる。例え
ば、前記特願平６−３３６６３４号の環状リングの誘導
加熱装置においては、図１４に示すように２つの誘導加
熱コイル１１、１２の間に配設した板状耐熱材３１に被
加熱体環状リング１を挟んで保持して加熱するようにな
っている。2. Description of the Related Art In a conventional wound-type induction heating coil, it is difficult to uniformly heat an annular ring, particularly a thin annular ring, in the width direction of the ring. Therefore, the applicant previously proposed a new annular ring induction heating device in Japanese Patent Application No. 6-336634. In such an induction heating device, there is a method in which an annular ring to be heated is placed on a flat heat-resistant material plate or sandwiched between flat heat-resistant material plates and held in an induction heating coil for heating. Be seen. For example, in the induction heating device for an annular ring of the above-mentioned Japanese Patent Application No. 6-336634, as shown in FIG. 14, a plate-shaped heat-resistant material 31 arranged between two induction heating coils 11 and 12 is an annular member to be heated. The ring 1 is sandwiched and held for heating.
【０００３】このような誘導加熱装置においては、炭素
鋼などの通常の焼入・焼戻しのように焼入温度に短時間
保持後、冷却する場合は、加熱時間が短いため被加熱体
と保持部材の間の熱伝達が少なく接触部の温度低下も少
ないので、被加熱体の温度むらはなく、熱処理硬さのむ
らも問題とはならない。また、保持部材の温度もあまり
上昇しないので、保持部材として高温度に耐える耐熱材
は必要としない。In such an induction heating apparatus, when cooling is performed after holding for a short time at the quenching temperature such as normal quenching / tempering of carbon steel, the heating time is short and the object to be heated and the holding member are cooled. Since the heat transfer between them is small and the temperature drop at the contact portion is small, there is no temperature unevenness of the object to be heated and uneven heat treatment hardness is not a problem. Further, since the temperature of the holding member does not rise so much, a heat resistant material that can withstand a high temperature is not required as the holding member.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、ステン
レス鋼などの熱処理においては、組織の拡散や炭化物の
固溶のために炭素鋼や低合金鋼などよりも高温度で長時
間の加熱・保持を必要とする。このような場合には、高
温で保持中に被加熱体と保持部材の接触部の熱伝達によ
り、被加熱体の接触部の温度が低下して温度むらが生
じ、均一な熱処理硬さが得られないという問題点が生ず
る。また、被加熱体の熱が保持部材に伝達して保持部材
の温度が上昇するので保持部材として高価な高温度の耐
熱材が必要になるという問題点があった。However, heat treatment of stainless steel or the like requires heating and holding at a higher temperature than carbon steel or low alloy steel for a long time due to the diffusion of the structure and the solid solution of carbides. And In such cases, heat transfer between the heated part and the holding part during holding at a high temperature lowers the temperature of the contact part of the heated part and causes temperature unevenness, resulting in uniform heat treatment hardness. There is a problem that it is not possible. In addition, since the heat of the object to be heated is transferred to the holding member and the temperature of the holding member rises, there is a problem that an expensive high temperature heat resistant material is required as the holding member.
【０００５】そこで本発明は、上記問題点を解決するた
め、誘導加熱中に被加熱体環状リングを点接触で保持す
ることにより、長時間の加熱保持の場合も加熱温度のむ
らが生じないで、均一な熱処理硬さが得られる環状リン
グの誘導加熱装置を提供することを目的とする。In order to solve the above-mentioned problems, the present invention holds the annular ring to be heated in point contact during induction heating so that the heating temperature does not fluctuate even when held for a long time. It is an object of the present invention to provide an induction heating device for an annular ring that can obtain uniform heat treatment hardness.
【０００６】[0006]
【課題を解決するための手段】上記目的を達成するため
に、本発明の環状リングの誘導加熱装置は、被加熱体環
状リングを複数の点接触により保持する絶縁耐熱材から
なる保持部材を備えたことを特徴とするものである。こ
のように点接触により保持することによって、被加熱体
と保持部材の接触面積が減少し、加熱の際の長時間の高
温の保持の場合も被加熱体の熱が保持部材を通して奪わ
れることが少なく、被加熱体の温度むらが生じないとい
う効果が得られる。In order to achieve the above object, an induction heating device for an annular ring according to the present invention comprises a holding member made of an insulating heat-resistant material for holding an annular ring to be heated by a plurality of point contacts. It is characterized by that. By holding by such point contact, the contact area between the object to be heated and the holding member is reduced, and the heat of the object to be heated may be removed through the holding member even in the case of holding a high temperature for a long time during heating. The effect is small and the temperature unevenness of the object to be heated does not occur.
【０００７】また、本発明の環状リングの誘導加熱装置
は、被加熱体環状リングに向けた面に複数の孔が配設さ
れ、該複数の孔に球面の一部が突出するように複数の絶
縁耐熱材の球体が嵌入された絶縁耐熱材からなる保持部
材を備え、該球体の球面接触により被加熱体環状リング
を保持することを特徴とするものである。このような球
面の点接触により、誘導加熱の長時間の加熱保持の場合
も被加熱体の熱が保持部材を通して奪われることが少な
く、被加熱体の温度むらが生じないという前記効果が達
成できると共に、被加熱体に接触する球体のみの耐熱度
を大きくすれば良く、球体を嵌入する部材は耐熱度が低
くてもよいので、保持部材の加工を容易にし原価を下げ
ることができる。Further, in the induction heating device for an annular ring of the present invention, a plurality of holes are arranged in the surface facing the annular ring to be heated, and a plurality of spherical surfaces are projected into the plurality of holes. The present invention is characterized in that a holding member made of an insulating heat-resistant material in which a spherical body of an insulating heat-resistant material is fitted is provided, and the spherical ring of the spherical body holds the annular ring to be heated. By such point contact of the spherical surface, the heat of the object to be heated is less likely to be taken away through the holding member even in the case of holding the induction heating for a long time, and the above effect that the temperature unevenness of the object to be heated does not occur can be achieved. At the same time, it is only necessary to increase the heat resistance of the sphere that comes into contact with the object to be heated, and the heat resistance of the member into which the sphere is inserted may be low. Therefore, the processing of the holding member can be facilitated and the cost can be reduced.
【０００８】また、本発明の環状リングの誘導加熱装置
の保持部材は、複数の貫通孔が配列された板状の保持板
と、前記複数の貫通孔に嵌入された前記保持板の板厚よ
りやや大きい直径を有する複数の球体から構成されてい
るものとすることにより、前記球体の一部が保持板から
突出して、この突出した球面で被加熱体を点接触保持す
るので、前記の目的・効果を簡易、安価に達成できる点
で望ましい。Further, the holding member of the induction heating device for an annular ring of the present invention comprises a plate-shaped holding plate having a plurality of through holes arranged therein, and a plate thickness of the holding plate fitted in the plurality of through holes. By comprising a plurality of spheres having a slightly large diameter, a part of the sphere protrudes from the holding plate, and the object to be heated is held in point contact with the protruding spherical surface. It is desirable because the effect can be achieved easily and at low cost.
【０００９】前記複数の球体は、各球体の球面が被加熱
体環状リングの表面形状に沿うように前記保持部材に立
体的に配列されていることが、曲面を有する被加熱体、
例えば皿ばねなどのような平面でない環状リングなどの
誘導加熱のために望ましい。The plurality of spheres have a curved surface that the spherical surface of each sphere is three-dimensionally arranged on the holding member so as to follow the surface shape of the ring to be heated.
It is desirable for induction heating of non-planar annular rings such as disc springs, for example.
【００１０】また、同一方向に高周波電流が流れる環状
形コイルを形成する第１及び第２の誘導加熱コイルを同
心軸上に間隔をおいて配設し、前記第１及び第２の誘導
加熱コイルの間に被加熱体環状リングを挿入して加熱す
る誘導加熱装置において、前記環状形コイルはほぼ水平
に配置され、前記保持部材は前記被加熱体環状リングの
下面を保持するように配設されるか、または、前記環状
形コイルはほぼ垂直に配置され、前記保持部材は前記被
加熱体環状リングの両面を挟んで保持するように配設さ
れることにより、被加熱体環状リングの幅方向の温度も
均一に加熱されて温度むらがなく、熱処理硬さが均一
で、かつ変形のない熱処理環状リングを得ることができ
る。Further, the first and second induction heating coils forming an annular coil in which a high-frequency current flows in the same direction are arranged on the concentric shaft at intervals, and the first and second induction heating coils are arranged. In an induction heating device that inserts and heats an annular ring to be heated between the annular coils, the annular coil is arranged substantially horizontally, and the holding member is arranged to hold the lower surface of the annular ring to be heated. Alternatively, the annular coil is arranged substantially vertically, and the holding member is arranged so as to hold both sides of the heated annular ring so that the heated annular ring extends in the width direction. It is possible to obtain a heat-treated annular ring which is uniformly heated, has no temperature unevenness, has a uniform heat-treatment hardness, and has no deformation.
【００１１】[0011]
【発明の実施の形態】以下、本発明を図示の一実施形態
について具体的に説明する。図１は本発明の環状リング
の誘導加熱装置の加熱コイルと保持部材の断面を示す図
（図２のＸ−Ｘ断面矢視図）、図２は本発明の環状リン
グの誘導加熱装置の平面図である。図３は図１の保持部
材の詳細平面図、図４は図３の保持部材の一部断面図で
ある。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to an embodiment shown in the drawings. 1 is a view showing a cross section of a heating coil and a holding member of an induction heating device for an annular ring of the present invention (a sectional view taken along the line X-X in FIG. 2), and FIG. 2 is a plan view of the induction heating device for an annular ring of the present invention. It is a figure. 3 is a detailed plan view of the holding member of FIG. 1, and FIG. 4 is a partial cross-sectional view of the holding member of FIG.
【００１２】図１及び図２において、環状形の上部の第
１誘導加熱コイル（以下第１コイルという）１１及び下
部の第２誘導加熱コイル（以下第２コイルという）１２
は、その間に固定テーブル２１及びスライドテーブル２
５を挟んで、水平にして所定の間隔をおいて配設されて
いる。上部の第１コイル１１の長脚のリード部１１ｂは
固定ブロック１３に接続され、短脚のリード部１１ｃは
導通ブロック１４の一端に接続されている。この導通ブ
ロック１４の他端は、第１コイル１１の長脚のリード部
１１ｂの裏側に当たる部位に位置する下部の第２コイル
１２の短脚のリード部１２ｃに導通するようにリード部
１２ｃに接続されている。第２コイル１２の長脚のリー
ド部１２ｂには固定ブロック１５が接続されている。In FIGS. 1 and 2, an upper first induction heating coil (hereinafter referred to as a first coil) 11 and a lower second induction heating coil (hereinafter referred to as a second coil) 12 each having an annular shape.
Meanwhile, the fixed table 21 and the slide table 2
5 are sandwiched, and they are horizontally arranged at a predetermined interval. The long leg lead portion 11 b of the upper first coil 11 is connected to the fixed block 13, and the short leg lead portion 11 c is connected to one end of the conduction block 14. The other end of the conduction block 14 is connected to the lead portion 12c so as to be electrically connected to the short leg lead portion 12c of the lower second coil 12, which is located at a portion corresponding to the back side of the long leg lead portion 11b of the first coil 11. Has been done. The fixed block 15 is connected to the long leg portion 12 b of the second coil 12.
【００１３】これにより、固定ブロック１３から導入さ
れる電流は鎖線矢印で示すように、第１コイル１１の長
脚リード部１１ｂから環状部１１ａを回って短脚リード
部１１ｃに流れ、導通ブロック１４を介して第２コイル
１２の短脚リード部１２ｃに導入される。そして、内側
矢印円のように環状部１２ａを回って、長脚リード部１
２ｃから固定ブロック１５に流れる。即ち、第１コイル
１１の環状部１１ａと第２コイル１２の環状部１２ａに
は同一方向の電流が流れるように構成されている。これ
らの第１コイル１１及び第２コイル１２は一体に組み立
てられ、装置の図示しないフレーム上に設けられた高周
波電源ターミナルに固定ブロック１３及び１５を接続す
ることにより、交換自在にフレームに固定されるように
なっている。As a result, the current introduced from the fixed block 13 flows from the long leg lead portion 11b of the first coil 11 around the annular portion 11a to the short leg lead portion 11c as shown by the chain line arrow, and the conduction block 14 is formed. It is introduced into the short leg lead portion 12c of the second coil 12 via. Then, it turns around the annular portion 12a as shown by the inner arrow circle, and
It flows from 2c to the fixed block 15. That is, the configuration is such that currents in the same direction flow through the annular portion 11a of the first coil 11 and the annular portion 12a of the second coil 12. The first coil 11 and the second coil 12 are integrally assembled, and are fixed to the frame interchangeably by connecting the fixing blocks 13 and 15 to a high-frequency power supply terminal provided on a frame (not shown) of the apparatus. It has become.
【００１４】第１コイル１１と第２コイル１２の間に配
設された固定テーブル２１は絶縁体で作られ、装置の図
示しないフレームに固定されている。固定テーブル２１
には、前記第１コイル１１、第２コイル１２の位置に保
持部材２２を嵌め込む方形の凹部２１ａが設けられてい
る。凹部２１ａの深さは、保持部材２２の球体２４の球
面が固定テーブル２１の上面とほぼ同じになるようにさ
れており、固定テーブル２１の高さは保持部材２２の上
面に載置した被加熱体環状リング１が第１コイル１１と
第２コイル１２に対し等距離になるような高さにされて
いる。これは被加熱体環状リング１の両面が両コイルに
より均等に加熱されるようにするためである。固定テー
ブル２１上には、図の矢印Ｙ方向に移動可能な絶縁体の
スライドテーブル２５が設けられている。スライドテー
ブル２５には被加熱体環状リング１の外径より僅かに大
きい円形孔２５ａが設けられ、円形孔２５ａに被加熱体
環状リング１を嵌装して、図の矢印Ｙ方向に移動して誘
導コイルの加熱位置と図２の右側の鎖線で示すリングの
取出し位置の間を移動するようになっている。The fixed table 21 arranged between the first coil 11 and the second coil 12 is made of an insulator and is fixed to a frame (not shown) of the apparatus. Fixed table 21
Is provided with a rectangular recess 21a into which the holding member 22 is fitted at the positions of the first coil 11 and the second coil 12. The depth of the concave portion 21a is such that the spherical surface of the spherical body 24 of the holding member 22 is substantially the same as the upper surface of the fixed table 21, and the height of the fixed table 21 is the height of the heated object placed on the upper surface of the holding member 22. The body ring 1 has a height such that it is equidistant from the first coil 11 and the second coil 12. This is to ensure that both sides of the heated annular ring 1 are evenly heated by both coils. On the fixed table 21, there is provided a slide table 25 made of an insulator that is movable in the direction of the arrow Y in the figure. The slide table 25 is provided with a circular hole 25a slightly larger than the outer diameter of the heated object annular ring 1, and the heated object annular ring 1 is fitted into the circular hole 25a and moved in the direction of the arrow Y in the figure. It moves between the heating position of the induction coil and the take-out position of the ring shown by the chain line on the right side of FIG.
【００１５】図３は保持部材２２の詳細平面図、図４は
その一部断面図である。図に示すように、保持部材２２
は複数の貫通孔２３ａを設けた保持板２３と、その貫通
孔２３ａに嵌入された球体２４からなる。保持板２３
は、前記固定テーブル２５の凹部２５ａの形状に等しい
方形の薄板からなり、球体２４より耐熱性の低い加工性
の良い絶縁性耐熱材から作られている。貫通孔２３ａ
は、保持部材を取換えないで径の異なる被加熱体リング
を保持できるように、複数の貫通孔２３ａが間隔をおい
て十字に配列されている。図では被加熱体リングを４個
の球体２４で保持するように貫通孔が十字に配列された
が、円周状に配列しても良く、薄いリングの加熱の際に
は４個以上の球体で保持するように配列しても良い。球
体２４は、アルミナ、ジルコニア等の熱衝撃性が大きく
耐熱度の高い絶縁性耐熱材で作られ、前記貫通孔２３ａ
に圧入して保持板２３に固定される。球体２４の直径は
保持板２３の厚さよりやや大きく、前記貫通孔に嵌入し
たときその一部が突出するようになっている。本実施形
態では、保持板２３の厚さを２ｍｍとし、球体２４の直
径を２．５ｍｍとして、０．５ｍｍ突出するようにし
た。そして、前記固定テーブル２１の凹部２１ａの深さ
を２．５ｍｍとした。FIG. 3 is a detailed plan view of the holding member 22, and FIG. 4 is a partial sectional view thereof. As shown in the figure, the holding member 22
Is composed of a holding plate 23 having a plurality of through holes 23a and a sphere 24 fitted in the through holes 23a. Holding plate 23
Is made of a rectangular thin plate having the same shape as the concave portion 25a of the fixed table 25, and is made of an insulating heat-resistant material having heat resistance lower than that of the spherical body 24 and good workability. Through hole 23a
Has a plurality of through holes 23a arranged in a cross shape at intervals so as to hold the rings to be heated having different diameters without replacing the holding member. Although the through holes are arranged in a cross shape so as to hold the ring to be heated by the four spheres 24 in the figure, they may be arranged in a circle, and when heating a thin ring, four or more spheres are formed. You may arrange so that it may hold | maintain. The spherical body 24 is made of an insulating heat-resistant material such as alumina or zirconia having a high thermal shock resistance and a high heat resistance.
It is pressed into and fixed to the holding plate 23. The diameter of the sphere 24 is slightly larger than the thickness of the holding plate 23, and a part of the sphere 24 projects when it is fitted into the through hole. In this embodiment, the holding plate 23 has a thickness of 2 mm, and the sphere 24 has a diameter of 2.5 mm so as to protrude by 0.5 mm. The depth of the recess 21a of the fixed table 21 was set to 2.5 mm.
【００１６】上記構成の誘導加熱装置の動作について説
明する。まずスライドテーブル２５を図２の右側にスラ
イドして、固定テーブル２１の凹部２１ａの上を明け、
凹部２１ａに保持部材２２を嵌め込む。すると、保持部
材２２の球体２４の球面がほぼ固定テーブル２１の上面
と同一になる。図２の右側鎖線のスライドテーブル２５
の取出し位置で、その円形孔２５ａに被加熱体環状リン
グ１を嵌装し、スライドテーブル２５を図の左にスライ
ドさせて、被加熱体環状リング１を加熱コイル１１、１
２と同心になる位置に設定する。すると、被加熱体環状
リング１は図１に示すように第１コイル１１と第２コイ
ル１２に対し等距離の位置に保持部材２２の４個の球体
２４の球面で点接触により保持される。この状態で誘導
加熱し、加熱後スライドテーブル２５を右にスライドさ
せ、取出し位置で環状リング１を取り出し急冷する。The operation of the induction heating device having the above structure will be described. First, slide the slide table 25 to the right side of FIG. 2 to open the recess 21a of the fixed table 21,
The holding member 22 is fitted into the recess 21a. Then, the spherical surface of the spherical body 24 of the holding member 22 becomes substantially the same as the upper surface of the fixed table 21. Slide table 25 on the right-hand chain line in FIG.
At the take-out position, the to-be-heated annular ring 1 is fitted into the circular hole 25a, and the slide table 25 is slid to the left in the figure to move the to-be-heated annular ring 1 to the heating coils 11 and 1.
Set to a position that is concentric with 2. Then, the annular ring 1 to be heated is held by point contact with the spherical surfaces of the four spheres 24 of the holding member 22 at positions equidistant from the first coil 11 and the second coil 12, as shown in FIG. In this state, induction heating is performed, and after heating, the slide table 25 is slid to the right, and the annular ring 1 is taken out at the take-out position and rapidly cooled.
【００１７】[0017]
【実施例】以下、本構成の環状リングの誘導加熱装置に
よる加熱実験の結果について説明する。実験条件は下記
の通りである。 被加熱体 リング材質：ＳＵＳ ４２０Ｊ２（中炭素鋼
１３クロムステンレス鋼） リング寸法：８７ｍｍφ×６１．３５ｍｍφ×０．８１
３ｍｍｔ 加熱条件 加熱コイル寸法：１０５ｍｍφ×６５ｍｍφ 周波数： １０ＫＨｚ 加熱時間： １１５０℃迄１０秒で昇温後、５秒保持、
急冷 リング保持条件：本発明の誘導加熱装置により加熱した
場合と、比較材としてリングを平面の耐熱板に乗せて保
持して加熱した場合の熱処理後の環状リングの硬さの分
布を測定した。本発明の保持部材は２ｍｍ厚さの保持板
と２．５ｍｍφの球体４個で保持し、比較材は２．５ｍ
ｍ厚さの平面耐熱板で保持した。[Examples] The results of a heating experiment by the induction heating device for an annular ring of this structure will be described below. The experimental conditions are as follows. Object to be heated Ring material: SUS 420J2 (medium carbon steel 13 chrome stainless steel) Ring size: 87 mmφ × 61.35 mmφ × 0.81
3 mmt heating condition Heating coil dimensions: 105 mmφ × 65 mmφ Frequency: 10 KHz Heating time: 1150 ° C. after heating in 10 seconds, holding for 5 seconds,
Quenching ring holding condition: The hardness distribution of the annular ring after heat treatment was measured when heated by the induction heating device of the present invention and when the ring was placed on a flat heat-resistant plate as a comparative material and held for heating. The holding member of the present invention is held by a holding plate having a thickness of 2 mm and four spheres having a diameter of 2.5 mm, and a comparative material is 2.5 m.
It was held by a flat heat-resistant plate having a thickness of m.
【００１８】上記加熱条件で加熱・冷却後、環状リング
の表面硬さを図５に示す円周８等分のＡ〜Ｈの箇所につ
いて、外径側Ａ１〜Ｈ１、リング幅中央Ａ２〜Ｈ２及び
内径側Ａ３〜Ｈ３の各３か所をビッカース硬度計で測定
した。その結果を表１に示す。図６〜図１１は、表１の
結果を図表化したものである。図６及び図７は比較材及
び本発明材のそれぞれの外径部の硬さ分布、図８及び９
はその幅中央部の硬さ分布、図１０及び１１はその内径
部の硬さ分布を示す。特に図６において明瞭なように、
比較材はＡ部外径部において硬さがＨｖ３１１と非常に
低く、硬さのばらつきＲが円周でＨｖ３１２、外径と内
径部とでＨｖ２８２と非常に大きい。Ａ部の両側のＢ
部、Ｈ部においてもＨｖ４６０、Ｈｖ４８０となお低
い。これは、被加熱体リングがＡ部で平面耐熱材に接触
し、加熱温度に保持中にこの接触部から耐熱材に熱を奪
われて温度低下するためである。図８の比較材のリング
幅中央部の硬さのばらつきは図６の外径部ほどではない
が、なお円周でＨｖ１４２もあり、図１０の内径部での
み円周のばらつきがＨｖ６０に減少する。After heating and cooling under the above-mentioned heating conditions, the surface hardness of the annular ring is divided into 8 parts of the circumference shown in FIG. 5 at points A to H, the outer diameter side A1 to H1, the ring width center A2 to H2, and Each of three points on the inner diameter side A3 to H3 was measured with a Vickers hardness meter. Table 1 shows the results. 6 to 11 are tabulated results of Table 1. 6 and 7 are hardness distributions of the outer diameter portions of the comparative material and the material of the present invention, and FIGS.
Shows the hardness distribution in the center of the width, and FIGS. 10 and 11 show the hardness distribution in the inner diameter. As is clear especially in FIG.
The comparative material has a very low hardness of Hv311 at the outer diameter portion of the A portion, and a hardness variation R of Hv312 at the circumference and very large at the outer diameter and the inner diameter portion of Hv282. B on both sides of part A
The Hv 460 and Hv 480 are still low in the H and H parts. This is because the ring to be heated comes into contact with the flat heat-resistant material at the portion A, and the heat-resistant material removes heat from the contact portion while maintaining the heating temperature to lower the temperature. The variation in hardness at the center of the ring width of the comparative material in FIG. 8 is not as great as in the outer diameter portion in FIG. To do.
【００１９】これに対し、図７、図９及び図１１に示す
本発明材では、円周、内外径部の硬さはＨｖ５８４〜６
４４の範囲で、ばらつきＲは少なく、最大ばらつきもＨ
ｖ６０以内になっている。また、図１〜４に示すように
環状リングは４点の球面で保持したが、この球体の接触
した部分の硬さの低下も見られない。なお、比較材も本
発明材も同一加熱条件で加熱したが、表１から本発明材
の熱処理硬さが比較材より僅かに高い傾向が認められ
る。本発明では保持部材への熱伝達によるロスが少ない
ためと考察される。On the other hand, in the materials of the present invention shown in FIGS. 7, 9 and 11, the hardness of the circumference and the inner and outer diameter portions is Hv 584-6.
Within the range of 44, the variation R is small and the maximum variation is H.
It is within v60. Further, as shown in FIGS. 1 to 4, the annular ring was held by the spherical surfaces of four points, but the hardness of the contacting portion of the spherical body was not reduced. Although the comparative material and the material of the present invention were heated under the same heating conditions, Table 1 shows that the heat treatment hardness of the material of the present invention tends to be slightly higher than that of the comparative material. In the present invention, it is considered that the loss due to the heat transfer to the holding member is small.
【００２０】以上述べたように、本発明の実施形態の環
状リングの誘導加熱装置によれば、被加熱体環状リング
を耐熱材の球体の球面で点接触保持するので、加熱温度
での保持時間の長い加熱の場合も保持部材に熱を奪われ
ることが少なく、この部の温度低下がなく、硬さむらの
ない均一な熱処理硬さの環状リングが得られる。また、
これにより熱処理変形も減少できる。さらに保持部材
は、被加熱体に接触する球体のみの耐熱温度が高ければ
良いので、保持板としては耐熱性の低い安価で加工性の
良い材料が使用できる。As described above, according to the annular ring induction heating apparatus of the embodiment of the present invention, since the to-be-heated annular ring is held in point contact with the spherical surface of the sphere of the heat-resistant material, the holding time at the heating temperature is maintained. Even in the case of long heating, heat is hardly taken by the holding member, the temperature of this portion does not drop, and an annular ring having uniform heat treatment hardness without hardness unevenness can be obtained. Also,
This also reduces heat treatment deformation. Furthermore, the holding member only needs to have a high heat-resistant temperature only for the spheres that come into contact with the object to be heated, so that a low-heat-resistant and inexpensive material having good workability can be used as the holding plate.
【００２１】なお、本実施例においては、平面の保持板
に球体を配列したものを用いたが、図１２に示すように
皿バネなどのような平面でない被加熱体の場合は、図に
示すような被加熱体の面形状に合わせて球体を配列した
保持部材を用いることもできる。また、本実施例では環
状形誘導加熱コイルを水平に配置したが、図１３に示す
ように垂直に配置して、被加熱体環状リング１の両面を
球体２４を配置した保持部材３０で挟んで保持しても良
い。In this embodiment, a flat holding plate in which spheres are arranged is used. However, as shown in FIG. 12, a non-planar heated object such as a disc spring is shown in the drawing. It is also possible to use a holding member in which spheres are arranged according to the surface shape of the object to be heated. Further, although the annular induction heating coil is arranged horizontally in the present embodiment, it is arranged vertically as shown in FIG. 13, and both sides of the heated object annular ring 1 are sandwiched by the holding members 30 in which the spheres 24 are arranged. You may keep it.
【００２２】[0022]
【発明の効果】以上説明したように、本発明構成の誘導
加熱装置によれば、誘導加熱の際に被加熱体環状リング
を球体の球面により点接触で保持するので、保持部材に
熱を奪われることが少なく、加熱むらがなく熱処理硬さ
の均一で変形の少ない環状リングを得ることができる。As described above, according to the induction heating apparatus of the present invention, since the annular ring to be heated is held in point contact with the spherical surface of the spherical body during induction heating, heat is absorbed by the holding member. It is possible to obtain an annular ring which is less likely to be damaged, has uniform heating hardness with less uneven heating, and has little deformation.
【図１】本発明実施形態の環状リングの誘導加熱装置の
誘導コイルと保持部材の断面を示す図である。FIG. 1 is a diagram showing a cross section of an induction coil and a holding member of an induction heating device for an annular ring according to an embodiment of the present invention.
【図２】本発明実施形態の環状リングの誘導加熱装置の
平面図である。FIG. 2 is a plan view of the induction heating device for the annular ring according to the embodiment of the present invention.
【図３】本発明実施形態の環状リングの誘導加熱装置の
保持部材の詳細平面図である。FIG. 3 is a detailed plan view of a holding member of the induction heating device for the annular ring according to the embodiment of the present invention.
【図４】図３の保持部材の一部断面図である。FIG. 4 is a partial cross-sectional view of the holding member of FIG.
【図５】本発明実施例の環状リングの熱処理硬さの測定
位置を示す図である。FIG. 5 is a diagram showing measurement positions of heat treatment hardness of the annular ring of the example of the present invention.
【図６】比較材リングの外径部の熱処理硬さ分布の測定
結果を示す図である。FIG. 6 is a diagram showing measurement results of heat treatment hardness distribution of an outer diameter portion of a comparative material ring.
【図７】本発明実施例のリングの外径部の熱処理硬さの
分布の測定結果を示す図である。FIG. 7 is a diagram showing a measurement result of a heat treatment hardness distribution of an outer diameter portion of a ring of an example of the present invention.
【図８】比較材リングの中央部の熱処理硬さの分布の測
定結果を示す図である。FIG. 8 is a diagram showing a measurement result of a heat treatment hardness distribution in a central portion of a comparative material ring.
【図９】本発明実施例のリングの中央部の熱処理硬さの
分布の測定結果を示す図である。FIG. 9 is a diagram showing a measurement result of a heat treatment hardness distribution in a central portion of a ring of an example of the present invention.
【図１０】比較材リングの内径部の熱処理硬さの分布の
測定結果を示す図である。FIG. 10 is a diagram showing a measurement result of a heat treatment hardness distribution of an inner diameter portion of a comparative material ring.
【図１１】本発明実施例のリングの内径部の熱処理硬さ
の分布の測定結果を示す図である。FIG. 11 is a diagram showing the measurement results of the heat treatment hardness distribution of the inner diameter portion of the ring of the example of the present invention.
【図１２】本発明の環状リングの誘導加熱装置における
保持部材の他の実施形態を示す図である。FIG. 12 is a view showing another embodiment of the holding member in the induction heating device for the annular ring of the present invention.
【図１３】本発明の他の実施形態の環状リングの誘導加
熱装置の断面を示す図である。FIG. 13 is a view showing a cross section of an induction heating device for an annular ring according to another embodiment of the present invention.
【図１４】従来の環状リングの誘導加熱装置の被加熱体
リングの保持方法を示す図である。FIG. 14 is a diagram showing a method of holding a ring to be heated of a conventional induction heating device for an annular ring.
【符号の説明】 １ 被加熱体環状リング １１ 第１誘導加熱コイル １１ａ 環状部 １１ｂ 長脚リード部 １１ｃ 短脚リード部 １２ 第２誘導加熱コイル １２ｂ 長脚リード部 １２ｃ 短脚リード部 １３ 固定ブロック １４ 導通ブロック １５ 固定ブロック ２１ 固定テーブル ２１ａ 凹部 ２２ 保持部材 ２３ 保持板 ２３ａ 貫通孔 ２４ 球体 ２５ スライドテーブル ２５ａ 円形孔 ３０ 保持部材 ３１ 板状耐熱材[Explanation of reference numerals] 1 to-be-heated annular ring 11 first induction heating coil 11a annular portion 11b long leg lead portion 11c short leg lead portion 12 second induction heating coil 12b long leg lead portion 12c short leg lead portion 13 fixed block 14 Conductive block 15 Fixed block 21 Fixed table 21a Recessed portion 22 Holding member 23 Holding plate 23a Through hole 24 Sphere 25 Slide table 25a Circular hole 30 Holding member 31 Plate heat resistant material
【表１】 [Table 1]
Claims (6)
り保持する絶縁耐熱材からなる保持部材を備えたことを
特徴とする環状リングの誘導加熱装置。1. An induction heating device for an annular ring, comprising: a holding member made of an insulating heat-resistant material for holding an annular ring to be heated by a plurality of point contacts.
孔が配設され、該複数の孔に球面の一部が突出するよう
に複数の絶縁耐熱材の球体が嵌入された絶縁耐熱材から
なる保持部材を備え、該球体の球面接触により被加熱体
環状リングを保持することを特徴とする環状リングの誘
導加熱装置。2. An insulating heat resistant device in which a plurality of holes are arranged on a surface of the heated object annular ring, and a plurality of insulating heat resistant material spheres are fitted into the plurality of holes so that a part of a spherical surface is projected. An induction heating device for an annular ring, comprising a holding member made of a material, and holding the annular ring to be heated by spherical contact of the spherical body.
れた板状の保持板と、前記複数の貫通孔に嵌入された前
記保持板の板厚よりやや大きい直径を有する複数の球体
から構成されていることを特徴とする請求項２に記載の
環状リングの誘導加熱装置。3. The holding member comprises a plate-shaped holding plate in which a plurality of through holes are arranged, and a plurality of spherical bodies having a diameter slightly larger than the plate thickness of the holding plate fitted in the plurality of through holes. The induction heating device for an annular ring according to claim 2, wherein the induction heating device is configured.
熱体環状リングの表面形状に沿うように前記保持部材に
立体的に配列されていることを特徴とする請求項２また
は３に記載の環状リングの誘導加熱装置。4. The plurality of spheres are three-dimensionally arranged on the holding member such that the spherical surface of each sphere follows the surface shape of the ring to be heated. An induction heating device for an annular ring as described.
イルを形成する第１及び第２の誘導加熱コイルを同心軸
上に間隔をおいて配設し、前記第１及び第２の誘導加熱
コイルの間に被加熱体環状リングを挿入して加熱する誘
導加熱装置において、前記環状形コイルはほぼ水平に配
置され、前記保持部材は前記被加熱体環状リングの下面
を保持するように配設されていることを特徴とする請求
項１から４のいずれかに記載の環状リングの誘導加熱装
置。5. A first and a second induction heating coils forming an annular coil in which a high-frequency current flows in the same direction are arranged on a concentric shaft at intervals, and the first and second induction heating coils are arranged. In an induction heating device that inserts and heats an annular ring to be heated between the annular coils, the annular coil is arranged substantially horizontally, and the holding member is arranged to hold the lower surface of the annular ring to be heated. The induction heating device for an annular ring according to any one of claims 1 to 4, wherein:
イルを形成する第１及び第２の誘導加熱コイルを同心軸
上に間隔をおいて配設し、前記第１及び第２の誘導加熱
コイルの間に被加熱体環状リングを挿入して加熱する誘
導加熱装置において、前記環状形コイルはほぼ垂直に配
置され、前記保持部材は前記被加熱体環状リングの両面
を挟んで保持するように配設されていることを特徴とす
る請求項１から４のいずれかに記載の環状リングの誘導
加熱装置。6. The first and second induction heating coils, wherein first and second induction heating coils forming an annular coil through which a high-frequency current flows in the same direction are arranged on a concentric axis at intervals. In an induction heating device that inserts and heats an annular ring to be heated between them, the annular coil is arranged substantially vertically, and the holding member is arranged so as to hold both sides of the annular ring to be heated. The induction heating device for an annular ring according to claim 1, wherein the induction heating device is provided.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7248239A JPH0971820A (en) | 1995-09-04 | 1995-09-04 | Induction heater for annular ring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7248239A JPH0971820A (en) | 1995-09-04 | 1995-09-04 | Induction heater for annular ring |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0971820A true JPH0971820A (en) | 1997-03-18 |
Family
ID=17175235
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7248239A Pending JPH0971820A (en) | 1995-09-04 | 1995-09-04 | Induction heater for annular ring |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0971820A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007262549A (en) * | 2006-03-30 | 2007-10-11 | High Frequency Heattreat Co Ltd | Coil for induction-heating drive plate, quenching holder and quenching method |
| JP2010027313A (en) * | 2008-07-16 | 2010-02-04 | Neturen Co Ltd | Induction heating coil |
| JP2016079466A (en) * | 2014-10-17 | 2016-05-16 | 株式会社ジェイテクト | Heat treatment apparatus and method |
| JP2019035155A (en) * | 2018-11-05 | 2019-03-07 | 株式会社ジェイテクト | Heat treatment method |
-
1995
- 1995-09-04 JP JP7248239A patent/JPH0971820A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007262549A (en) * | 2006-03-30 | 2007-10-11 | High Frequency Heattreat Co Ltd | Coil for induction-heating drive plate, quenching holder and quenching method |
| JP4662275B2 (en) * | 2006-03-30 | 2011-03-30 | 高周波熱錬株式会社 | Drive plate induction heating coil, quenching jig, and quenching method |
| JP2010027313A (en) * | 2008-07-16 | 2010-02-04 | Neturen Co Ltd | Induction heating coil |
| JP2016079466A (en) * | 2014-10-17 | 2016-05-16 | 株式会社ジェイテクト | Heat treatment apparatus and method |
| JP2019035155A (en) * | 2018-11-05 | 2019-03-07 | 株式会社ジェイテクト | Heat treatment method |
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