JP2005330543A - High frequency induction heat-treatment apparatus - Google Patents

High frequency induction heat-treatment apparatus Download PDF

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JP2005330543A
JP2005330543A JP2004150437A JP2004150437A JP2005330543A JP 2005330543 A JP2005330543 A JP 2005330543A JP 2004150437 A JP2004150437 A JP 2004150437A JP 2004150437 A JP2004150437 A JP 2004150437A JP 2005330543 A JP2005330543 A JP 2005330543A
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workpiece
quenching
cooling fluid
work
support members
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Nobuyuki Suzuki
伸幸 鈴木
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NTN Corp
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NTN Corp
NTN Toyo Bearing 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/25—Process efficiency

Abstract

<P>PROBLEM TO BE SOLVED: To provide a high frequency induction heat-treatment apparatus with which a hardening treatment can be applied to a thin sheet-like work, for example, a raceway ring for thrust rolling bearing without causing the deformation. <P>SOLUTION: This apparatus is provided with one pair of supporting members 12 for holding the thin sheet-like work W between both surfaces. Further, this apparatus is provided with a heating coil 1 for performing the induction-heating to the work W supported with these supporting members 12 and a hardening-cooling fluid body supplying device 4 for supplying the hardening-cooling fluid body to the work W supported with the supporting members 12. On the work holding surface 12aa of the supporting members 12, a passage 16 for hardening-cooling fluid body is arranged. In the case of the work W having the ring shape, the pair of supporting members 12 are freely rotatably supported on the mutually concentric rotating center O and provided with a rotation-driving means 14 for rotating these supporting members. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

この発明は、各種の機械部品とされる薄板状のワーク、例えばスラスト転がり軸受の軌道輪等のリング状のワークにつき、高周波誘導加熱して焼入する高周波焼入装置に関するものである。   The present invention relates to an induction hardening apparatus for quenching by induction induction heating of thin plate-like workpieces, which are various mechanical parts, for example, ring-like workpieces such as bearing rings of thrust rolling bearings.

機械部品、例えばリング状のワークの焼入に際する加熱方法として、単巻の加熱コイルを用い、その内周に同心にワークを配置し、高周波誘導加熱を行う方法がある（例えば非特許文献１）。
しかし、軸受軌道輪等の量産される機械部品の焼入は、雰囲気炉で全体焼入することが一般的である。軸受における高周波焼入は、車輪用軸受における軌道面のみの焼入等のように、局部的に焼入を施す場合に採用されている。
（社）日本熱処理技術協会／日本金属熱処理工業会編集、「熱処理技術入門」大河出版、平成１３年４月２５日発行、第２８５頁 As a heating method for quenching a machine part, for example, a ring-shaped workpiece, there is a method in which a single-turn heating coil is used, a workpiece is arranged concentrically on the inner periphery, and high-frequency induction heating is performed (for example, non-patent literature). 1).
However, it is common to quench a machine part such as a bearing race that is mass-produced in an atmosphere furnace. Induction hardening in a bearing is employed when locally hardening, such as quenching only a raceway surface in a wheel bearing.
Edited by Japan Heat Treatment Technology Association / Edited by Japan Metal Heat Treatment Industry Association, “Introduction to Heat Treatment Technology”, Okawa Publishing, April 25, 2001, page 285

軸受軌道輪等の機械部品の全体焼入を行う場合の加熱は、上記のように炉内で行うことが一般的であるが、多品種少量生産の場合、炉による熱処理では、炉の処理可能個数に対して半端な個数となることがあり、効率が悪い。また、要求に応じて必要時に必要個数だけ焼入品をラインに供給したり、外部に納品するような場合は、炉による焼入れでは在庫を多く抱えることが必要となる。炉による加熱は、炉内に入れた機械部品の位置によっても、加熱温度がばらつくことがある。
このため、軸受軌道輪の焼入を、１個ずつ高周波焼入で行うことを試みた。高周波焼入によると、必要個数だけを処理することができ、また処理品間でのばらつきの少ない均一な熱処理が可能となる。 Heating is generally performed in the furnace as described above for the entire quenching of machine parts such as bearing rings, but in the case of high-mix low-volume production, the furnace can be treated by heat treatment in the furnace. The number may be odd with respect to the number, and the efficiency is poor. In addition, when a required number of hardened products are supplied to the line or delivered to the outside as needed, it is necessary to hold a large amount of inventory in the quenching by the furnace. The heating temperature in the furnace may vary depending on the position of the machine parts placed in the furnace.
For this reason, an attempt was made to quench the bearing races one by one by induction quenching. According to induction hardening, only the required number can be processed, and uniform heat treatment with little variation between processed products can be achieved.

しかし、薄板状のワーク、例えばスラスト転がり軸受の軌道輪等のようなリング状で薄板状のワークにつき高周波焼入を行おうとした場合、加熱後の急冷時などに、残留応力によってワークが変形する。そのため、薄板状のワークを高周波焼入することが出来なかった。
特に、スラスト転がり軸受の軌道輪では、性能や転動寿命等の確保のために寸法や形状の精度が厳しく求められ、熱処理に伴う歪みの発生は、できるだけ避ける必要がある。焼入時に歪みが大きく生じると、焼戻に時間がかかったり、焼戻を行っても十分に変形を無くすことができない場合がある。また、焼入後の研削取代を大きくする必要が生じる。 However, when an induction hardening is performed on a thin plate-like workpiece, for example, a ring-like thin plate-like workpiece such as a thrust rolling bearing raceway, the workpiece is deformed by residual stress during rapid cooling after heating. . For this reason, it was impossible to induction harden a thin plate-like workpiece.
In particular, in a rolling ring of a thrust rolling bearing, the accuracy of dimensions and shape is strictly required to ensure performance, rolling life, and the like, and it is necessary to avoid the occurrence of distortion due to heat treatment as much as possible. If a large distortion occurs during quenching, it may take time for tempering, or deformation may not be sufficiently eliminated even after tempering. In addition, it is necessary to increase the grinding allowance after quenching.

この発明の目的は、薄板状のワークを、変形を生じることなく焼入処理することができる高周波焼入装置を提供することである。
この発明の他の目的は、スラスト軸受の軌道輪等のような高精度が求められるリング状の薄板状ワークであっても、要求精度を満足でき、また均一な焼入品質を得ることができるものとすることである。 An object of the present invention is to provide an induction hardening apparatus capable of quenching a thin plate-like workpiece without causing deformation.
Another object of the present invention is to satisfy the required accuracy and obtain uniform quenching quality even for a ring-shaped thin plate-like workpiece such as a bearing ring of a thrust bearing that requires high accuracy. Is to be.

この発明の高周波焼入装置は、薄板状のワークを焼入する装置であって、前記ワークを両面から挟み付ける一対の支持部材と、これら支持部材に支持されたワークに誘導加熱を行う加熱コイルと、前記支持部材に支持されたワークに焼入冷却流体を供給する焼入冷却流体供給装置とを備え、前記支持部材のワーク挟付け面に、焼入冷却流体の通路を設けたものである。   The induction hardening apparatus according to the present invention is an apparatus for quenching a thin plate-like workpiece, a pair of support members that sandwich the workpiece from both sides, and a heating coil that performs induction heating on the workpiece supported by these support members And a quenching cooling fluid supply device that supplies quenching cooling fluid to the workpiece supported by the support member, and a quenching cooling fluid passage is provided on the workpiece clamping surface of the support member. .

この構成によると、ワークを一対の支持部材で挟み付けた状態で、加熱コイルによる誘導加熱を行う。この加熱されたワークに、焼入冷却流体供給装置から焼入冷却流体を浴びせて急冷することにより焼入する。この急冷時に、ワークは一対の支持部材で挟み付けられているため、変形を生じることが防止され、元の形状を維持したまま冷却される。上記支持部材は、ワーク挟付け面に焼入冷却流体の通路を設けられているため、ワークの上記支持部材で挟み付けられる面にも焼入冷却流体が供給され、ワークの全体を均等にかつ効率良く冷却することができる。焼入冷却流体の通路を設けることで、支持部材がワークに接触する面積が減少し、ワークの熱が逃げることの防止効果も得られる。また、この構成によると、ワークの加熱から急冷までを、支持部材で挟み付けたままで行え、途中で持ち替える必要がないため、持ち替えに伴うワークの変形が生じず、また持ち替えの手間が省けて効率良く焼入が行える。   According to this configuration, induction heating by the heating coil is performed with the workpiece sandwiched between the pair of support members. The heated workpiece is quenched by being quenched with a quenching cooling fluid from a quenching cooling fluid supply device. At the time of this rapid cooling, since the workpiece is sandwiched between the pair of support members, the deformation is prevented and the workpiece is cooled while maintaining the original shape. Since the support member is provided with a quenching cooling fluid passage on the workpiece clamping surface, the quenching cooling fluid is also supplied to the surface of the workpiece sandwiched by the support member, so that the entire workpiece is uniformly and It can be cooled efficiently. By providing the quenching cooling fluid passage, the area where the support member comes into contact with the workpiece is reduced, and the effect of preventing the heat of the workpiece from escaping is also obtained. In addition, according to this configuration, the workpiece can be heated to rapidly cooled while being sandwiched between the support members, and there is no need to change the workpiece in the middle. Quench well.

この発明の高周波焼入装置は、前記薄板状のワークがリング状である場合は、次の構成とすることが好ましい。前記一対の支持部材は、互いに同心の回転中心上で回転自在に支持されて前記ワークを回転中心と同心に支持するものとする。これら支持部材を回転させる回転駆動手段を設ける。
リング状のワークの場合、このように回転させながら誘導加熱を行うことにより、全周に渡り均等に加熱することができる。また、ワークの急冷処理も、回転させながら焼入冷却流体を浴びせることで、ワーク全体を均等に急冷することができる。これらのため、ワーク全体の焼入品質を均等なものとできる。 The induction hardening apparatus of the present invention preferably has the following configuration when the thin plate-like workpiece is ring-shaped. The pair of support members are rotatably supported on rotation centers that are concentric with each other, and support the workpiece concentrically with the rotation center. Rotation driving means for rotating these support members is provided.
In the case of a ring-shaped workpiece, by performing induction heating while rotating in this way, it can be heated uniformly over the entire circumference. In addition, the workpiece can be rapidly cooled evenly by exposing the quenching cooling fluid to rotation while rotating the workpiece. For these reasons, the quenching quality of the entire workpiece can be made uniform.

前記ワークがスラスト転がり軸受の軌道輪である場合は、寸法，形状等の精度や、焼入品質等に高度な品質を求められるため、この発明の高周波焼入装置による変形防止の効果、特に上記のように挟み付け状態で回転させながら加熱および急冷を行うことによる均等化の利点が効果的に発揮される。   When the workpiece is a bearing ring of a thrust rolling bearing, it is required to have high quality in terms of accuracy such as dimensions and shape, and quenching quality. Therefore, the effect of preventing deformation by the induction hardening apparatus of the present invention, particularly the above Thus, the advantage of equalization by performing heating and quenching while rotating in the sandwiched state is effectively exhibited.

この発明の高周波焼入装置は、薄板状のワークを焼入する高周波焼入装置であって、前記ワークを両面から挟み付ける一対の支持部材と、これら支持部材に支持されたワークに誘導加熱を行う加熱コイルと、前記支持部材に支持されたワークに焼入冷却流体を供給する焼入冷却流体供給装置とを備え、前記支持部材のワーク挟付け面に焼入冷却流体の通路を設けたものであるため、薄板状のワークを、変形を生じることなく焼入処理することができるという効果が得られる。
前記一対の支持部材を回転自在に支持し、これら支持部材を回転させる回転駆動手段を設けた場合は、スラスト軸受の軌道輪等のような高精度が求められるリング状の薄板状ワークであっても、要求精度を満足でき、また均一な焼入品質を得ることができる。 The induction hardening apparatus according to the present invention is an induction hardening apparatus for hardening a thin plate-like workpiece, and includes a pair of support members that sandwich the workpiece from both sides, and induction heating of the workpiece supported by these support members. A heating coil to be performed, and a quenching cooling fluid supply device for supplying a quenching cooling fluid to the workpiece supported by the support member, and providing a quenching cooling fluid passage on a work clamping surface of the support member Therefore, the effect that the thin plate-like workpiece can be quenched without causing deformation can be obtained.
When the pair of support members are rotatably supported and provided with a rotation drive means for rotating the support members, a ring-shaped thin plate-like workpiece that requires high accuracy, such as a bearing ring of a thrust bearing, However, the required accuracy can be satisfied and uniform quenching quality can be obtained.

この発明の第１の実施形態を図１および図２と共に説明する。この高周波焼入装置は、加熱コイル１と、この加熱コイル１に高周波電流を供給する高周波電源２と、被熱処理品であるワークＷを支持するワーク支持手段３と、冷却液等の焼入冷却流体を供給する焼入冷却流体供給装置４とを備える。ワークＷは、薄板状のリング状品である。図示の例ではワークＷは、スラスト転がり軸受の軌道輪である。   A first embodiment of the present invention will be described with reference to FIGS. This induction hardening apparatus includes a heating coil 1, a high frequency power source 2 that supplies a high frequency current to the heating coil 1, a work support means 3 that supports a work W that is a heat-treated product, and quenching and cooling of a coolant or the like. And a quenching and cooling fluid supply device 4 for supplying a fluid. The workpiece W is a thin ring-shaped product. In the illustrated example, the workpiece W is a bearing ring of a thrust rolling bearing.

ワーク支持手段３は、互いに上下に配置されてワークＷを両面から挟み付ける一対の支持部材１２を有する。これら支持部材１２は、互いに同心の回転中心Ｏ上で回転自在なように、軸受１３を介してフレーム（図示せず）に支持されており、回転駆動手段１４により回転駆動される。回転駆動手段１４は、モータおよびその回転の伝達系により構成される。支持部材１２は、ワークＷを挟む円板部１２ａと、この円板部１２ａの背面中央から突出した軸部１２ｂとを有し、軸部１２ｂで上記軸受１３により支持されている。回転駆動手段１４による支持部材１２の回転駆動は、上下の両方の支持部材１２に伝えるようにしても良く、また上下いずれか片方の支持部材１２のみを回転駆動し、ワークＷを挟み付けた状態で上下の支持部材１２が共に回転するものとしても良い。   The work support means 3 has a pair of support members 12 that are arranged one above the other and sandwich the work W from both sides. These support members 12 are supported by a frame (not shown) via bearings 13 so as to be rotatable on rotation centers O that are concentric with each other, and are rotationally driven by a rotation driving means 14. The rotation driving means 14 is composed of a motor and a rotation transmission system. The support member 12 includes a disk portion 12a that sandwiches the workpiece W and a shaft portion 12b that protrudes from the center of the back surface of the disk portion 12a, and is supported by the bearing 13 on the shaft portion 12b. The rotational drive of the support member 12 by the rotational drive means 14 may be transmitted to both the upper and lower support members 12, or only one of the upper and lower support members 12 is rotationally driven to sandwich the workpiece W. The upper and lower support members 12 may be rotated together.

上下の支持部材１２は、相対的に昇降自在に設けられており、昇降装置１５により昇降させられる。この昇降により、上下の支持部材１２間へのワークＷの挿脱と、上下の支持部材１２によるワークＷの挟み付け力を得るようになされている。上下の支持部材１２は、いずれか一方を昇降可能とし、他方を高さ位置固定としても良く、また両方が共に昇降可能なものとしても良い。なお、ワークＷの挿脱のために支持部材１２を昇降させる駆動手段と、ワークＷに挟み付け力を与えるための駆動手段とはそれぞれ別に設けても良いが、ここでは昇降装置１５が両機能を兼ねるものとしてある。   The upper and lower support members 12 are provided so as to be relatively movable up and down, and are moved up and down by the lifting device 15. By moving up and down, the workpiece W is inserted and removed between the upper and lower support members 12, and the clamping force of the workpiece W by the upper and lower support members 12 is obtained. One of the upper and lower support members 12 can be moved up and down, the other can be fixed at a height position, or both can be moved up and down together. In addition, although the drive means which raises / lowers the support member 12 for inserting / removing the workpiece W and the drive means for applying a clamping force to the workpiece W may be provided separately, here, the lifting / lowering device 15 has both functions. It also serves as

支持部材１２の材質は、非磁性体で、かつ耐熱性に優れた材質が好ましく、セラミックス製のものと等とされる。例えば、アルミナやコージライト系の材質等が好ましい。   The material of the support member 12 is preferably a non-magnetic material and excellent in heat resistance, such as a ceramic material. For example, alumina or cordierite material is preferable.

加熱コイル１は、支持部材１２と共にワークＷが回転することを妨げないように配置される。この例では、加熱コイル１は、上側の支持部材１２の上方と、下側の支持部材１２の下方に位置して、ワークＷにできるだけ近くなるように配置されている。加熱コイル１は、ワークＷの全周に対向するように、単巻きリング状のものとして支持部材１２の回転中心Ｏの回りの配置しても、またワークＷの円周方向複数箇所に位置するように分散して配置しても良い。また、加熱コイル１は、支持部材１２をワークＷの挿脱のために昇降させるときに、支持部材１２と共に昇降するか、または退避動作を行い、支持部材１２の昇降を妨げないように設置されている。   The heating coil 1 is disposed so as not to prevent the workpiece W from rotating together with the support member 12. In this example, the heating coil 1 is positioned above the upper support member 12 and below the lower support member 12 so as to be as close as possible to the workpiece W. Even if the heating coil 1 is disposed around the rotation center O of the support member 12 as a single ring shape so as to face the entire circumference of the workpiece W, the heating coil 1 is also positioned at a plurality of locations in the circumferential direction of the workpiece W. It may be arranged in a distributed manner. Further, the heating coil 1 is installed so as not to hinder the lifting and lowering of the supporting member 12 by moving up and down together with the supporting member 12 when the supporting member 12 is lifted and lowered for inserting and removing the workpiece W. ing.

高周波電源２は、交流商用電源等から受電盤を介して得た電流を、所定周波数の高周波に変換して加熱コイル１に供給する手段であり、サイリスタインバータ式やトランジスタインバータ式等のものが使用される。高周波電源２と加熱コイル１との間には電流変成器（図示せず）を介在させる。   The high frequency power source 2 is a means for converting a current obtained from an AC commercial power source or the like through a power receiving board into a high frequency of a predetermined frequency and supplying it to the heating coil 1, and a thyristor inverter type or transistor inverter type is used. Is done. A current transformer (not shown) is interposed between the high frequency power source 2 and the heating coil 1.

支持部材１２のワーク挟付け面１２ａａには冷却液等の焼入冷却流体の通路１６が設けられており、また支持部材１２の中心部に冷却液等の焼入冷却流体の供給路１７が設けられている。これら上下の支持部材１２の供給路１７の入口は、焼入冷却流体供給装置４の吐出口に配管（図示せず）等で接続されている。支持部材１２は回転自在であるため、必要に応じて、ロータリジョイント（図示せず）を介して供給路１７から前記配管に接続される。   The workpiece clamping surface 12aa of the support member 12 is provided with a quenching cooling fluid passage 16 such as a cooling liquid, and a quenching cooling fluid supply passage 17 such as a cooling liquid is provided at the center of the support member 12. It has been. The inlets of the supply passages 17 of the upper and lower support members 12 are connected to the discharge ports of the quenching and cooling fluid supply device 4 by piping (not shown) or the like. Since the support member 12 is rotatable, it is connected to the pipe from the supply path 17 through a rotary joint (not shown) as necessary.

支持部材１２のワーク挟付け面１２ａａは、リング状のワークＷの全体を挟み付けるようにリング状に設けられ、支持部材１２のワーク対向面の中央部は円形の凹み部１８とされている。支持部材１２の前記焼入冷却流体の通路１６は、例えば図２に示すように、放射状に延びる線状の凸部１９を形成することで、その隣合う凸部１９の間が上記通路１６として構成されている。凸部１９の断面形状は、半円状、三角形状、台形状、方形状などの任意の断面形状とされる。   The workpiece clamping surface 12aa of the support member 12 is provided in a ring shape so as to clamp the entire ring-shaped workpiece W, and the center portion of the workpiece facing surface of the support member 12 is a circular recess 18. For example, as shown in FIG. 2, the quenching cooling fluid passage 16 of the support member 12 forms linear projections 19 extending radially, and the gaps between the adjacent projections 19 serve as the passages 16. It is configured. The cross-sectional shape of the convex portion 19 is an arbitrary cross-sectional shape such as a semicircular shape, a triangular shape, a trapezoidal shape, or a square shape.

上記凸部１９は、例えば図３（Ａ）に示すように円弧状に延びるものであっても、また渦巻き状に延びるものや、網目状に延びるものであっても良い。
また、凸部１９は、線状に延びるものに限らず、例えば図３（Ｂ）に一部を示すようにワーク挟付け面１２ａａの全体に分散したボス状のものであっても良い。このボス状の凸部１９は、半球状のものであっても、三角錐等の角錐状の形状や、角錐台状の形状であっても良い。凸部１９が分散したボス状のものである場合、その凸部１９の間の空間が焼入冷却流体の通路１６となる。 For example, as shown in FIG. 3A, the convex portion 19 may extend in an arc shape, may extend in a spiral shape, or may extend in a mesh shape.
Moreover, the convex part 19 is not restricted to what extends linearly, For example, as shown in part in FIG. 3 (B), it may be a boss-like one distributed over the entire workpiece clamping surface 12aa. The boss-like convex portion 19 may be a hemispherical shape, a pyramid shape such as a triangular pyramid, or a truncated pyramid shape. When the convex portions 19 are in a dispersed boss shape, the space between the convex portions 19 becomes the quenching cooling fluid passage 16.

上記構成の高周波焼入装置による熱処理過程を説明する。ワーク支持手段３の上下の支持部材１２でワークＷを挟み込み、支持部材１２と共に駆動源１４でワークＷを回転させながら、加熱コイル１に高周波電源２から高周波電力を供給する。加熱コイル１に高周波電流が流れることにより、交番磁束が発生し、ワークＷが誘導加熱される。すなわち、ワークＷを通る磁束の変化による渦電流損やヒステリシス損等により発熱現象が生じる。ワークＷの温度が目標の加熱最高温度であるオーステナイト化温度まで昇温すると、その温度を一定時間維持した後、焼入冷却流体として、水等の焼入冷却液を供給してワークＷを急冷する。これによりワークＷが焼入される。   The heat treatment process by the induction hardening apparatus having the above configuration will be described. The work W is sandwiched between the upper and lower support members 12 of the work support means 3, and high frequency power is supplied from the high frequency power source 2 to the heating coil 1 while rotating the work W together with the support member 12 by the drive source 14. When a high-frequency current flows through the heating coil 1, an alternating magnetic flux is generated, and the workpiece W is induction-heated. That is, a heat generation phenomenon occurs due to eddy current loss, hysteresis loss, and the like due to a change in magnetic flux passing through the workpiece W. When the temperature of the workpiece W is raised to the austenitizing temperature, which is the target maximum heating temperature, the temperature is maintained for a certain period of time, and then a quenching coolant such as water is supplied as a quenching cooling fluid to rapidly cool the workpiece W To do. Thereby, the workpiece W is hardened.

この急冷時に、ワークＷは一対の支持部材１２で挟み付けられているため、変形を生じることが防止され、元の形状を維持したまま冷却される。挟み付けておくため、焼入冷却液の供給を圧力付与状態で行っても、ワークＷの位置がずれることがない。支持部材１２は、ワーク挟付け面１２ａａに焼入冷却液の通路１６を設けられているため、ワークＷの上記支持部材１２で挟み付けられる面にも焼入冷却液が供給され、ワークＷの全体を均等に、かつ効率良く冷却することができる。
焼入冷却液の通路１６を設けることで、支持部材１２がワークＷに接触する面積が減少し、ワークＷの熱が逃げることの防止効果も得られる。特に、支持部材１２に上記のような線状またはボス状の凸部１９を設けて焼入冷却液の通路１６を設けた場合、接触面積をできるだけ少なくし、ワークＷから熱が逃げることを防止して効率良くかつ均等に加熱することができる。 At the time of this rapid cooling, since the workpiece W is sandwiched between the pair of support members 12, deformation is prevented and the workpiece W is cooled while maintaining its original shape. Therefore, even if the quenching coolant is supplied in a pressure-applied state, the position of the workpiece W does not shift. Since the support member 12 is provided with the quenching coolant passage 16 on the workpiece clamping surface 12aa, the quenching coolant is also supplied to the surface of the workpiece W sandwiched by the support member 12, and the workpiece W The whole can be cooled evenly and efficiently.
By providing the quenching coolant passage 16, the area where the support member 12 contacts the workpiece W is reduced, and the effect of preventing the heat of the workpiece W from escaping can also be obtained. In particular, when the support member 12 is provided with the linear or boss-shaped protrusions 19 as described above and the quenching coolant passage 16 is provided, the contact area is reduced as much as possible to prevent heat from escaping from the workpiece W. And can be heated efficiently and evenly.

また、この構成によると、ワークＷの加熱から急冷までを、支持部材１２で挟み付けたままで行えて、途中で持ち替える必要がないため、持ち替えに伴うワークＷの変形が生じず、また持ち替えの手間が省けて効率良く焼入が行える。   In addition, according to this configuration, since the work W can be heated to rapidly cooled while being sandwiched between the support members 12, there is no need to change the work in the middle. Can be quenched efficiently.

ワークＷはリング状であるが、回転させながら誘導加熱を行うため、全周に渡り均等に加熱することができる。また、ワークＷの急冷処理も、回転させながら焼入冷却液を浴びせるようにするため、ワークＷの全体を均等に急冷することができる。これらのため、ワークＷの全体の焼入品質を均等なものとできる。そのため、ワークＷがスラスト転がり軸受の軌道輪の場合のように、寸法，形状等の精度や、焼入品質等に高度な品質を求められるものであっても、この実施形態における挟み付けながら加熱，急冷を行うによる変形防止の利点や、回転させながら加熱および急冷を行うことによる均等化の利点が効果的に発揮される。   Although the workpiece W has a ring shape, induction heating is performed while rotating, so that the workpiece W can be heated uniformly over the entire circumference. In addition, since the quenching treatment of the workpiece W is also performed so that the quenching coolant is bathed while rotating, the entire workpiece W can be evenly quenched. For these reasons, the entire quenching quality of the workpiece W can be made uniform. Therefore, even if the work W is required to have high quality such as dimensions and shapes, quenching quality, etc., as in the case of a raceway ring of a thrust rolling bearing, heating is performed while sandwiching in this embodiment. , The advantage of preventing deformation by performing rapid cooling and the advantage of equalization by performing heating and rapid cooling while rotating are effectively exhibited.

なお、上記実施形態では、ワークＷの両面に対向して加熱コイル１を配置するようにしたが、片面側のみに加熱コイル１を配置するようにしても良い。
また、上記実施形態ではワークＷが転がり軸受の軌道輪である場合につき説明したが、この発明はワークＷが上記軌道輪である場合に限らず、薄板状のリング状品の場合に一般に適用でき、さらにワークＷがリング状品の場合に限らず、鋼製の機械部品等となる薄板状のワーク一般に適用することができる。 In the above embodiment, the heating coil 1 is arranged to face both surfaces of the workpiece W. However, the heating coil 1 may be arranged only on one side.
In the above embodiment, the case where the workpiece W is a rolling bearing raceway has been described. However, the present invention is not limited to the case where the workpiece W is the raceway, and is generally applicable to a thin ring-shaped ring product. Furthermore, the present invention is not limited to the case where the workpiece W is a ring-shaped product, but can be applied to a thin plate-shaped workpiece generally used as a steel machine part or the like.

この発明の第１の実施形態にかかる高周波焼入装置の破断正面図である。It is a fracture front view of the induction hardening apparatus concerning 1st Embodiment of this invention. その支持部材のワーク挟付け面を示す平面図である。It is a top view which shows the workpiece clamping surface of the supporting member. 支持部材のワーク挟付け面の焼入冷却液通路の変形例を示す平面図である。It is a top view which shows the modification of the quenching coolant path of the workpiece | work clamping surface of a supporting member.

符号の説明Explanation of symbols

１…加熱コイル
２…高周波電源
３…ワーク支持手段
４…焼入冷却流体供給装置
１２…支持部材
１２ａａ…ワーク挟付け面
１４…回転駆動装置
１６…焼入冷却液の通路
Ｗ…ワーク DESCRIPTION OF SYMBOLS 1 ... Heating coil 2 ... High frequency power supply 3 ... Work support means 4 ... Quenching cooling fluid supply device 12 ... Support member 12aa ... Work clamping surface 14 ... Rotation drive device 16 ... Hardening coolant passage W ... Workpiece

Claims (3)

薄板状のワークを焼入する高周波焼入装置であって、前記ワークを両面から挟み付ける一対の支持部材と、これら支持部材に支持されたワークに誘導加熱を行う加熱コイルと、前記支持部材に支持されたワークに焼入冷却流体を供給する焼入冷却流体供給装置とを備え、前記支持部材のワーク挟付け面に焼入冷却流体の通路を設けた高周波焼入装置。   An induction hardening apparatus for quenching a thin plate-shaped workpiece, a pair of support members that sandwich the workpiece from both sides, a heating coil that performs induction heating on the workpiece supported by these support members, and the support member A high-frequency quenching apparatus, comprising: a quenching cooling fluid supply device that supplies a quenching cooling fluid to a supported workpiece; and providing a quenching cooling fluid passage on a workpiece clamping surface of the support member. 請求項１において、前記ワークがリング状であり、前記一対の支持部材が互いに同心の回転中心上で回転自在に支持され前記ワークを回転中心と同心に支持するものであり、これら支持部材を回転させる回転駆動手段を設けた高周波焼入装置。   2. The workpiece according to claim 1, wherein the workpiece is ring-shaped, and the pair of support members are rotatably supported on rotation centers that are concentric with each other, and support the workpieces concentrically with the rotation center. Induction hardening apparatus provided with a rotational drive means. 請求項２において、前記ワークがスラスト転がり軸受の軌道輪である高周波焼入装置。   The induction hardening apparatus according to claim 2, wherein the workpiece is a raceway ring of a thrust rolling bearing.
JP2004150437A 2004-05-20 2004-05-20 High frequency induction heat-treatment apparatus Pending JP2005330543A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
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
CN103740923A (en) * 2014-01-23 2014-04-23 浙江五洲新春集团股份有限公司 High-frequency annealing device of semi-automatic bearing
JP6479141B1 (en) * 2017-11-14 2019-03-06 中外炉工業株式会社 Work hardening processing equipment
CN112941284A (en) * 2021-01-29 2021-06-11 诸暨虹茂重工机械有限公司 Metal quenching equipment for metal heat treatment

Cited By (7)

* Cited by examiner, † Cited by third party
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
CN103740923A (en) * 2014-01-23 2014-04-23 浙江五洲新春集团股份有限公司 High-frequency annealing device of semi-automatic bearing
CN103740923B (en) * 2014-01-23 2015-06-10 浙江五洲新春集团股份有限公司 High-frequency annealing device of semi-automatic bearing
JP6479141B1 (en) * 2017-11-14 2019-03-06 中外炉工業株式会社 Work hardening processing equipment
CN112941284A (en) * 2021-01-29 2021-06-11 诸暨虹茂重工机械有限公司 Metal quenching equipment for metal heat treatment
CN112941284B (en) * 2021-01-29 2022-07-08 诸暨虹茂重工机械有限公司 Metal quenching equipment for metal heat treatment

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