JP2006070343A - High frequency heat treatment method and high frequency heat treatment device - Google Patents

High frequency heat treatment method and high frequency heat treatment device Download PDF

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JP2006070343A
JP2006070343A JP2004257377A JP2004257377A JP2006070343A JP 2006070343 A JP2006070343 A JP 2006070343A JP 2004257377 A JP2004257377 A JP 2004257377A JP 2004257377 A JP2004257377 A JP 2004257377A JP 2006070343 A JP2006070343 A JP 2006070343A
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heat treatment
linear motion
groove
frequency heat
rail
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JP4373883B2 (en
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Tadashi Morita
紀 守田
Kazuhiro Kushima
一弘 久嶋
Isamu Sasa
勇 笹
Hajime Nitta
一 新田
Isamu Hatanaka
勇 畠中
Toshihiko Enomoto
敏彦 榎本
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NETUREN HEATTREAT CORPORATIVE
NETUREN HEATTREAT CORPORATIVE Ltd
Neturen Co Ltd
THK Co Ltd
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NETUREN HEATTREAT CORPORATIVE
NETUREN HEATTREAT CORPORATIVE Ltd
Neturen Co Ltd
THK Co Ltd
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Priority to KR1020050074286A priority patent/KR20060050443A/en
Priority to CN200510099415XA priority patent/CN1749419B/en
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    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/0006—Details, accessories not peculiar to any of the following furnaces
    • C21D9/0012—Rolls; Roll arrangements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D3/00—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts
    • B21D3/02—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts by rollers
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/06—Surface hardening
    • C21D1/09—Surface hardening by direct application of electrical or wave energy; by particle radiation
    • C21D1/10—Surface hardening by direct application of electrical or wave energy; by particle radiation by electric induction
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/18—Hardening; Quenching with or without subsequent tempering
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/04—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for rails
    • 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 heat treatment device capable of reducing the deformation of a rail for a direct-acting bearing after quenching and tempering. <P>SOLUTION: The high frequency heat treatment device 10 is provided with two or more pairs of straightening rollers 12, 13, ... for conveying a work W while straightening the same, an induction heating coil 30 for quenching of heating the groove W2 in the work W; a cooler 32 of injecting a cooling liquid to the groove W2, an induction heating coil 34 for tempering of tempering the groove W2 or the like. The two or more pairs of straightening rollers, 12, ... are composed of pairs of upper and lower straightening rollers for performing straightening while holding the work W from the thickness direction thereof under prescribed pressure and conveying the same, and pairs of right and left straightening rollers for performing straightening while holding and conveying the work W from the width direction thereof under prescribed pressure. As the pairs of upper and lower straightening rollers, two sets of a pair of the first upper and lower straightening rollers 12, 13, two sets of a pair of the second upper and lower straightening rollers 14, 15, and two sets of a pair of the third upper and lower straightening rollers 16, 17 are arranged in order from the upstream side in the conveying direction. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、その幅方向側面部に溝が形成された直動ベアリング用レールの溝を高周波熱処理する高周波熱処理方法及び高周波熱処理装置に関する。   The present invention relates to a high-frequency heat treatment method and a high-frequency heat treatment apparatus for performing high-frequency heat treatment on a groove of a linear motion bearing rail in which grooves are formed on the side surface in the width direction.

所定の長手方向に延びる直動ベアリング用レールとブロックを組み合わせてこのブロックを直線運動させる直動ベアリングが広く使用されている。直動ベアリング用レールの幅方向（長手方向に直交する方向）側面部には、ブロックのボールが摺動する溝が形成されている。ブロックが直動ベアリング用レールに案内されてその長手方向に直線運動する際にはボールが溝を繰り返し摺動する。このため、通常は、直動ベアリング用レールの溝は焼入れされて硬化されている。   Linear motion bearings that linearly move a block by combining a linear motion bearing rail and a block extending in a predetermined longitudinal direction are widely used. A groove in which the ball of the block slides is formed on a side surface in the width direction (direction perpendicular to the longitudinal direction) of the linear motion bearing rail. When the block is guided by the linear bearing rail and linearly moves in the longitudinal direction, the ball slides repeatedly in the groove. For this reason, normally, the groove | channel of the rail for linear motion bearings is hardened and hardened.

直動ベアリング用レールの溝を焼入れする際には、この溝を誘導加熱コイルで焼入温度に加熱して急冷し、その後、直動ベアリング用レールを電気炉に装入して、その硬化した溝を電気炉で焼戻している。さらに、この焼戻しの後に直動ベアリング用レールの曲がりを測定してこの曲がりを矯正している。   When quenching the groove of the rail for the linear motion bearing, the groove is heated to the quenching temperature with an induction heating coil and rapidly cooled, and then the rail for the linear motion bearing is placed in an electric furnace and hardened. The groove is tempered in an electric furnace. Further, after this tempering, the bending of the linear motion bearing rail is measured to correct this bending.

上述したように、直動ベアリング用レールの溝を焼入れして硬化する際には、誘導加熱コイルを使用する焼入工程と、電気炉を使用する焼戻工程と、焼戻し後の曲がりを矯正する矯正工程が必要となる。このため、直動ベアリング用レールを焼入工程から焼戻工程に移動するための移動時間が必要となり、この移動時間がロスタイムとなっている。また、焼戻し後に曲がりを矯正するので、焼入れによる曲がりと焼戻しによる曲がりとを矯正工程で一度に矯正することとなる。従って、曲がり量が多くてその矯正に長時間を要することがある。さらに、焼戻工程の後、直動ベアリング用レールの温度が４０℃以下になってから曲がり矯正を行う場合は、硬くなった直動ベアリング用レールを矯正することとなり、矯正にいっそう時間がかかることがある。   As described above, when hardening the grooves of the linear motion bearing rail by hardening, the hardening process using the induction heating coil, the tempering process using the electric furnace, and the bending after tempering are corrected. A correction process is required. For this reason, the movement time for moving the linear motion bearing rail from the quenching process to the tempering process is required, and this movement time is a loss time. Further, since the bending is corrected after tempering, the bending due to quenching and the bending due to tempering are corrected at a time in the correction process. Therefore, the amount of bending may be large and the correction may take a long time. Furthermore, after the tempering process, if straightening bearing rail temperature is 40 ° C or lower and bending correction is performed, the hardened linear bearing rail will be corrected, and it will take more time for correction. Sometimes.

本発明は、上記事情に鑑み、焼入れ焼戻し後における直動ベアリング用レールの変形を低減できる高周波熱処理方法及び高周波熱処理装置を提供することを目的とする。   In view of the above circumstances, an object of the present invention is to provide a high-frequency heat treatment method and a high-frequency heat treatment apparatus that can reduce deformation of a linear motion rail after quenching and tempering.

上記目的を達成するための本発明の高周波熱処理方法は、所定の搬送方向に延びると共にその幅方向側面部に溝が形成された直動ベアリング用レールの前記溝を高周波熱処理する高周波熱処理方法において、
（１）前記直動ベアリング用レールをその厚さ方向から矯正しながら搬送して前記溝を所定の焼入温度に誘導加熱し、この誘導加熱の直後に冷却し、
（２）この冷却された直動ベアリング用レールをその厚さ方向から矯正しながら搬送して該直動ベアリング用レールを所定の焼戻温度に誘導加熱して焼戻しを施し、
（３）この焼戻しが施された直動ベアリング用レールをその厚さ方向から矯正しながら搬送することを特徴とするものである。 In order to achieve the above object, the high-frequency heat treatment method of the present invention is a high-frequency heat treatment method for performing high-frequency heat treatment on the groove of the linear motion bearing rail that extends in a predetermined transport direction and has a groove formed on a side surface in its width direction.
(1) The linear motion bearing rail is conveyed while being corrected from its thickness direction, the groove is induction heated to a predetermined quenching temperature, and cooled immediately after the induction heating,
(2) The cooled linear motion bearing rail is conveyed while being corrected in the thickness direction, and the linear motion bearing rail is induction-heated to a predetermined tempering temperature to be tempered,
(3) The linear bearing rail subjected to tempering is conveyed while being corrected from the thickness direction.

ここで、
（４）前記直動ベアリング用レールをその厚さ方向から矯正しながら搬送する際に、その幅方向からも矯正しながら搬送してもよい。 here,
(4) When the linear motion bearing rail is conveyed while being corrected from its thickness direction, it may be conveyed while being corrected from its width direction.

また、上記目的を達成するための本発明の高周波熱処理装置は、所定の搬送方向に延びると共にその幅方向側面部に溝が形成された直動ベアリング用レールを前記搬送方向に搬送しながら前記溝を高周波熱処理する高周波熱処理装置において、
（５）前記直動ベアリング用レールをその厚さ方向から所定の圧力で挟んで矯正しながら前記搬送方向に搬送する第１上下矯正ローラ対と、
（６）この第１上下矯正ローラ対よりも前記搬送方向下流側に配置された、前記溝を所定の焼入温度に加熱する焼入用誘導加熱コイルと、
（７）該焼入用誘導加熱コイルで前記焼入温度に加熱された溝を冷却する冷却器と、
（８）前記直動ベアリング用レールをその厚さ方向から所定の圧力で挟んで矯正しながら前記搬送方向に搬送する、前記冷却器よりも前記搬送方向下流側に配置された第２上下矯正ローラ対と、
（９）この第２上下矯正ローラ対よりも前記搬送方向下流側に配置された、前記溝を所定の焼戻温度に加熱する焼戻用誘導加熱コイルと、
（１０）前記直動ベアリング用レールをその厚さ方向から所定の圧力で挟んで矯正しながら前記搬送方向に搬送する、前記焼戻用誘導加熱コイルよりも前記搬送方向下流側に配置された第３上下矯正ローラ対とを備えたことを特徴とするものである。 In order to achieve the above object, the high-frequency heat treatment apparatus of the present invention provides a linear motion bearing rail that extends in a predetermined conveyance direction and has grooves formed in a side surface in the width direction while conveying the groove in the conveyance direction. In a high-frequency heat treatment apparatus for high-frequency heat treatment,
(5) a first pair of upper and lower straightening rollers for conveying the linear motion bearing rail in the conveying direction while correcting the linear motion bearing rail with a predetermined pressure from the thickness direction;
(6) An induction heating coil for quenching that is disposed on the downstream side in the transport direction with respect to the first pair of vertical correction rollers and that heats the groove to a predetermined quenching temperature;
(7) a cooler that cools the groove heated to the quenching temperature by the induction heating coil for quenching;
(8) A second vertical correction roller disposed downstream of the cooler in the transport direction, and transports the linear motion bearing rail in the transport direction while correcting the linear motion rail with a predetermined pressure from the thickness direction. Vs.
(9) An induction heating coil for tempering that is disposed on the downstream side in the transport direction with respect to the second pair of upper and lower straightening rollers and that heats the groove to a predetermined tempering temperature;
(10) The first linear bearing rail is disposed downstream of the induction heating coil for tempering and conveyed in the conveying direction while correcting the linear bearing rail with a predetermined pressure from the thickness direction. 3 is provided with a pair of upper and lower straightening rollers.

ここで、
（１１）前記直動ベアリング用レールのうち前記第１上下矯正ローラ対によって挟まれる部分をその幅方向から所定の圧力で挟んで矯正する第１左右矯正ローラ対と、
（１２）前記直動ベアリング用レールのうち前記第２上下矯正ローラ対によって挟まれる部分をその幅方向から所定の圧力で挟んで矯正する第２左右矯正ローラ対と、
（１３）前記直動ベアリング用レールのうち前記第３上下矯正ローラ対によって挟まれる部分をその幅方向から所定の圧力で挟んで矯正する第３左右矯正ローラ対とを備えてもよい。 here,
(11) a first left and right correction roller pair that corrects a portion of the linear motion rail that is sandwiched between the first vertical correction roller pair with a predetermined pressure from the width direction;
(12) a second left / right correction roller pair that corrects a portion of the linear motion rail that is sandwiched between the second vertical correction roller pair by sandwiching a portion thereof from the width direction with a predetermined pressure;
(13) You may provide the 3rd left-right correction roller pair which correct | amends the part pinched | interposed by the said 3rd vertical correction roller pair among the said linear motion bearing rails with the predetermined pressure from the width direction.

本発明によれば、熱処理中の直動ベアリング用レールが各矯正ローラ対によって矯正されるので、その反りや波打ちなどの変形を低減できる。   According to the present invention, since the linear motion bearing rail during heat treatment is corrected by each of the correction roller pairs, deformation such as warpage and undulation can be reduced.

本発明は、所定の搬送方向に延びると共にその幅方向側面部に溝が形成された直動ベアリング用レールの高周波熱処理に実現された。   The present invention has been realized by high-frequency heat treatment of a linear motion bearing rail that extends in a predetermined conveying direction and has a groove formed in a lateral side surface thereof.

図１から図３までを参照して本発明を説明する。   The present invention will be described with reference to FIGS.

図１は、本発明の高周波熱処理が施されるワークを示す斜視図である。図２は、本発明の高周波熱処理装置の概略構成を示す平面図である。図３は、図２の高周波熱処理装置を示す側面図である。なお、図２では上下矯正ローラ対は省略されており、図３では、左右矯正ローラ対が省略されている。   FIG. 1 is a perspective view showing a workpiece to which high frequency heat treatment according to the present invention is applied. FIG. 2 is a plan view showing a schematic configuration of the high-frequency heat treatment apparatus of the present invention. FIG. 3 is a side view showing the high-frequency heat treatment apparatus of FIG. In FIG. 2, the vertical correction roller pair is omitted, and in FIG. 3, the horizontal correction roller pair is omitted.

高周波熱処理装置１０は、軸受鋼製の直動ベアリング用レールＷ（以下、ワークＷという）の溝Ｗ２を硬化するためのものである。溝Ｗ２を硬化するとは、溝Ｗ２の内壁面を硬化することをいう。ワークＷは所定の搬送方向（矢印Ａ方向）に延びると共にその幅方向（矢印Ｂ方向）側面部Ｗ１に溝Ｗ２が形成されている。溝Ｗ２は、厚さ方向（矢印ｔ方向）のほぼ中央部に形成されており、幅方向側面部Ｗ１において矢印Ａ方向に延びている。ワークＷは、溝Ｗ２の形成されていない上面Ｗ３を上に向けると共に幅方向側面部Ｗ１を側方に向けた状態で搬送される。   The high-frequency heat treatment apparatus 10 is for curing a groove W2 of a linear motion bearing rail W (hereinafter referred to as a work W) made of bearing steel. Curing the groove W2 means curing the inner wall surface of the groove W2. The workpiece W extends in a predetermined conveying direction (arrow A direction) and a groove W2 is formed in a side surface W1 in the width direction (arrow B direction). The groove W2 is formed at a substantially central portion in the thickness direction (arrow t direction), and extends in the arrow A direction on the side surface portion W1 in the width direction. The workpiece W is conveyed in a state where the upper surface W3 where the groove W2 is not formed is directed upward and the width side surface portion W1 is directed sideways.

高周波熱処理装置１０は、ワークＷを矯正しながら搬送する複数の矯正ローラ対１２，１３，…２２，２３，……と、ワークＷの溝Ｗ２を加熱するための焼入用誘導加熱コイル３０と、溝Ｗ２に冷却液を噴射する冷却器３２と、溝Ｗ２を焼戻すための焼戻用誘導加熱コイル３４などを備えている。複数の矯正ローラ対１２，１３，……は、ワークＷをその厚さ方向（上下方向）から所定の圧力で挟みながら矯正すると共に搬送する上下矯正ローラ対と、ワークＷをその幅方向（左右方向）から所定の圧力で挟みながら矯正すると共に搬送する左右矯正ローラ対とからなる。上下矯正ローラ対としては搬送方向上流側から順に、２組の第１上下矯正ローラ対１２，１３と、２組の第２上下矯正ローラ対１４，１５と、２組の第３上下矯正ローラ対１６，１７とが配置されている。また、左右矯正ローラ対としては、ワークＷのうち２組の第１上下矯正ローラ対１２，１３によって挟まれて矯正される部分をその幅方向から所定の圧力で挟んで矯正する第１左右矯正ローラ対２２，２３と、ワークＷのうち２組の第２上下矯正ローラ対１４，１５によって挟まれて矯正される部分をその幅方向から所定の圧力で挟んで矯正する第２左右矯正ローラ対２４，２５と、ワークＷのうち２組の第３上下矯正ローラ対１６，１７によって挟まれて矯正される部分をその幅方向から所定の圧力で挟んで矯正する第３左右矯正ローラ対２６，２７とが配置されている。なお、ここでは、２組としたが３組以上の矯正ローラ対を配置してもよい。   The induction heat treatment apparatus 10 includes a plurality of straightening roller pairs 12, 13,... 22, 23,... That convey the work W while straightening, and a quenching induction heating coil 30 for heating the groove W <b> 2 of the work W. , A cooler 32 for injecting the coolant into the groove W2, a tempering induction heating coil 34 for tempering the groove W2, and the like. The plurality of straightening roller pairs 12, 13,... Correct the workpiece W while sandwiching it with a predetermined pressure from the thickness direction (vertical direction), and convey the workpiece W in the width direction (left and right). Direction) and a pair of left and right correction rollers that carry and correct while pinching with a predetermined pressure. In order from the upstream side in the conveying direction, the two pairs of first vertical correction roller pairs 12 and 13, two sets of second vertical correction roller pairs 14 and 15, and two sets of third vertical correction roller pairs 16 and 17 are arranged. Further, as the left / right correction roller pair, a first left / right correction is performed by correcting a portion of the work W sandwiched between two first vertical correction roller pairs 12 and 13 with a predetermined pressure from the width direction. A pair of rollers 22 and 23 and a second pair of right and left straightening rollers that corrects a portion of the work W that is sandwiched and corrected by two pairs of second top and bottom straightening roller pairs 14 and 15 from the width direction with a predetermined pressure. 24, 25, and a third left / right correction roller pair 26 that corrects a part of the work W that is sandwiched and corrected by two pairs of third vertical correction roller pairs 16, 17 with a predetermined pressure from its width direction. 27 are arranged. In addition, although it was set as 2 sets here, you may arrange | position 3 sets or more of correction roller pairs.

各矯正ローラ対１２，２２……は、搬送中のワークＷが反ったり波打ったりしないように水平に位置決めされている。このため、例えば第１上下矯正ローラ対１２の２つの回転軸１２ａ，１２ｂは軸受（図示せず）などを介して高周波熱処理装置１０の本体に回転自在に固定されている。他のローラ対についても同様である。なお、２つの回転軸１２ａ，１２ｂのうち一方は固定するが、他方はばねやシリンダ等で多少移動できるように配置してもよく、他のローラ対についても同様である。   Each of the correction roller pairs 12, 22... Is positioned horizontally so that the workpiece W being conveyed does not warp or wave. For this reason, for example, the two rotary shafts 12a and 12b of the first vertical correction roller pair 12 are rotatably fixed to the main body of the high-frequency heat treatment apparatus 10 via bearings (not shown). The same applies to the other roller pairs. One of the two rotary shafts 12a and 12b is fixed, but the other may be arranged so that it can be moved somewhat by a spring, a cylinder or the like, and the same applies to other roller pairs.

第１上下矯正ローラ対１２，１３よりも搬送方向下流側（第１左右矯正ローラ対２２，２３よりも搬送方向下流側でもあり、以下、同様）には、ワークＷの溝Ｗ２を所定の焼入温度に加熱する焼入用誘導加熱コイル３０が配置されている。この焼入用誘導加熱コイル３０よりもやや搬送方向下流側には、所定の焼入温度に加熱された溝Ｗ２に冷却液を噴射して急冷する冷却器３２が配置されている。焼入用誘導加熱コイル３０と冷却器３２は、第２上下矯正ローラ対１４，１５よりも搬送方向上流側に配置されていることとなる。   On the downstream side in the transport direction from the first pair of vertical correction rollers 12 and 13 (which is also downstream in the transport direction from the first pair of right and left straightening rollers 22 and 23; hereinafter the same), a groove W2 of the workpiece W is formed with a predetermined firing. A quenching induction heating coil 30 for heating to the inlet temperature is arranged. A cooler 32 for injecting a coolant into the groove W2 heated to a predetermined quenching temperature and quenching it is disposed slightly downstream of the induction heating coil 30 for quenching in the transport direction. The induction heating coil 30 for quenching and the cooler 32 are arranged on the upstream side in the transport direction from the second pair of upper and lower straightening rollers 14 and 15.

第２上下矯正ローラ対１４，１５よりも搬送方向下流側には、ワークＷの溝Ｗ２を所定の焼戻温度に加熱する焼戻用誘導加熱コイル３４が配置されている。また、焼戻用誘導加熱コイル３４よりも搬送方向下流側には、第３上下矯正ローラ対１６，１７が配置されている。   A tempering induction heating coil 34 that heats the groove W2 of the workpiece W to a predetermined tempering temperature is disposed on the downstream side in the transport direction from the second pair of upper and lower straightening rollers 14 and 15. In addition, a third pair of upper and lower straightening rollers 16 and 17 are disposed downstream of the induction heating coil 34 for tempering in the transport direction.

上記した構成の高周波熱処理装置１０を使用してワークＷを熱処理する一例を説明する。   An example in which the workpiece W is heat-treated using the high-frequency heat treatment apparatus 10 having the above-described configuration will be described.

高周波熱処理装置１０では、例えば冷間加工で引き抜かれて加工応力が残留しているワークＷを熱処理する。加工応力が残留しているワークＷが焼入温度に加熱された場合は、加工応力が解放されることによりワークＷが反ったり波打ったりする（変形する）ことがある。また、焼入れに起因してワークＷが変形することもある。このような変形は、上下方向にも左右方向にも起こり得る。   In the high-frequency heat treatment apparatus 10, for example, the workpiece W that has been pulled out by cold working and has a remaining working stress is heat-treated. When the workpiece W in which the processing stress remains is heated to the quenching temperature, the workpiece W may be warped or waved (deformed) due to the release of the processing stress. Further, the workpiece W may be deformed due to quenching. Such deformation can occur both vertically and horizontally.

高周波熱処理装置１０では、焼入用誘導加熱コイル３０、冷却器３２、及び焼戻用誘導加熱コイル３４の前後（搬送方向上流側及び下流側）に複数の矯正ローラ対１２，２２，……が配置されているので、熱処置中にワークＷが変形してもこの変形が矯正ローラ対１２，２２，……によって矯正される。従って、焼戻し終了後のワークＷにはほとんど変形がない。   In the induction heat treatment apparatus 10, a plurality of correction roller pairs 12, 22,... Are provided before and after the induction heating coil 30 for quenching, the cooler 32, and the induction heating coil 34 for tempering (upstream and downstream in the conveying direction). Therefore, even if the workpiece W is deformed during the heat treatment, the deformation is corrected by the correction roller pairs 12, 22,. Accordingly, the workpiece W after tempering is hardly deformed.

本発明の高周波熱処理が施されるワークを示す斜視図である。It is a perspective view which shows the workpiece | work in which the high frequency heat processing of this invention is given. 本発明の高周波熱処理装置の概略構成を示す平面図である。It is a top view which shows schematic structure of the high frequency heat processing apparatus of this invention. 図２の高周波熱処理装置を示す側面図である。It is a side view which shows the high frequency heat processing apparatus of FIG.

符号の説明Explanation of symbols

１０ 高周波熱処理装置
１２，１３ 第１上下矯正ローラ対
１４，１５ 第２上下矯正ローラ対
１６，１７ 第３上下矯正ローラ対
２２，２３ 第１左右矯正ローラ対
２４，２５ 第２左右矯正ローラ対
２６，２７ 第３左右矯正ローラ対
３０ 焼入用誘導加熱コイル
３２ 冷却器
３４ 焼戻用誘導加熱コイル
Ｗ ワーク
Ｗ２ ワークの溝 DESCRIPTION OF SYMBOLS 10 High frequency heat processing apparatus 12, 13 1st top and bottom straightening roller pair 14,15 2nd top and bottom straightening roller pair 16,17 3rd top and bottom straightening roller pair 22,23 1st right and left straightening roller pair 24,25 2nd left and right straightening roller pair 26 , 27 Third left and right straightening roller pair 30 Induction heating coil 32 for quenching Cooler 34 Induction heating coil for tempering W Work W2 Groove of work

Claims (4)

所定の搬送方向に延びると共にその幅方向側面部に溝が形成された直動ベアリング用レールの前記溝を高周波熱処理する高周波熱処理方法において、
前記直動ベアリング用レールをその厚さ方向から矯正しながら搬送して前記溝を所定の焼入温度に誘導加熱し、この誘導加熱の直後に冷却し、
この冷却された直動ベアリング用レールをその厚さ方向から矯正しながら搬送して該直動ベアリング用レールを所定の焼戻温度に誘導加熱して焼戻しを施し、
この焼戻しが施された直動ベアリング用レールをその厚さ方向から矯正しながら搬送することを特徴とする高周波熱処理方法。 In a high-frequency heat treatment method for performing high-frequency heat treatment on the groove of the linear motion bearing rail that extends in a predetermined conveyance direction and has a groove formed on the side surface in the width direction thereof,
The linear motion rail is conveyed while correcting from the thickness direction, and the groove is induction-heated to a predetermined quenching temperature, and cooled immediately after the induction heating,
The cooled linear motion bearing rail is conveyed while being corrected from its thickness direction, and the linear motion bearing rail is induction-heated to a predetermined tempering temperature to be tempered,
A high-frequency heat treatment method characterized in that the linear bearing rail subjected to tempering is conveyed while being corrected from the thickness direction. 前記直動ベアリング用レールをその厚さ方向から矯正しながら搬送する際に、その幅方向からも矯正しながら搬送することを特徴とする請求項１に記載の高周波熱処理方法。 2. The high frequency heat treatment method according to claim 1, wherein when the linear motion rail is conveyed while being corrected from the thickness direction, the linear motion rail is conveyed while being corrected from the width direction. 所定の搬送方向に延びると共にその幅方向側面部に溝が形成された直動ベアリング用レールを前記搬送方向に搬送しながら前記溝を高周波熱処理する高周波熱処理装置において、
前記直動ベアリング用レールをその厚さ方向から所定の圧力で挟んで矯正しながら前記搬送方向に搬送する第１上下矯正ローラ対と、
この第１上下矯正ローラ対よりも前記搬送方向下流側に配置された、前記溝を所定の焼入温度に加熱する焼入用誘導加熱コイルと、
該焼入用誘導加熱コイルで前記焼入温度に加熱された溝を冷却する冷却器と、
前記直動ベアリング用レールをその厚さ方向から所定の圧力で挟んで矯正しながら前記搬送方向に搬送する、前記冷却器よりも前記搬送方向下流側に配置された第２上下矯正ローラ対と、
この第２上下矯正ローラ対よりも前記搬送方向下流側に配置された、前記溝を所定の焼戻温度に加熱する焼戻用誘導加熱コイルと、
前記直動ベアリング用レールをその厚さ方向から所定の圧力で挟んで矯正しながら前記搬送方向に搬送する、前記焼戻用誘導加熱コイルよりも前記搬送方向下流側に配置された第３上下矯正ローラ対とを備えたことを特徴とする高周波熱処理装置。 In a high-frequency heat treatment apparatus that performs high-frequency heat treatment on the groove while conveying in the conveyance direction a linear motion bearing rail that extends in a predetermined conveyance direction and has a groove formed on a side surface in the width direction thereof,
A first vertical correction roller pair that conveys the linear motion rail in the conveying direction while correcting the linear bearing rail from the thickness direction with a predetermined pressure;
An induction heating coil for quenching, which is disposed on the downstream side in the transport direction with respect to the first vertical correction roller pair, and heats the groove to a predetermined quenching temperature;
A cooler for cooling the groove heated to the quenching temperature by the induction heating coil for quenching;
A second pair of upper and lower straightening rollers disposed downstream of the cooler in the transport direction, transporting in the transport direction while correcting the linear motion rail with a predetermined pressure from the thickness direction;
An induction heating coil for tempering that is disposed on the downstream side in the transport direction with respect to the second pair of upper and lower straightening rollers and that heats the groove to a predetermined tempering temperature;
A third vertical correction arranged downstream of the induction heating coil for tempering, which conveys the linear motion rail in the conveying direction while correcting it with a predetermined pressure from the thickness direction. An induction heat treatment apparatus comprising a pair of rollers. 前記直動ベアリング用レールのうち前記第１上下矯正ローラ対によって挟まれる部分をその幅方向から所定の圧力で挟んで矯正する第１左右矯正ローラ対と、
前記直動ベアリング用レールのうち前記第２上下矯正ローラ対によって挟まれる部分をその幅方向から所定の圧力で挟んで矯正する第２左右矯正ローラ対と、
前記直動ベアリング用レールのうち前記第３上下矯正ローラ対によって挟まれる部分をその幅方向から所定の圧力で挟んで矯正する第３左右矯正ローラ対とを備えたことを特徴とする請求項３に記載の高周波熱処理装置。 A first pair of left and right straightening rollers for straightening and straightening a portion sandwiched by the first vertical straightening roller pair from the width direction of the linear bearing rail;
A second pair of right and left straightening rollers for straightening and pinching a portion of the linear motion rail between the second vertical straightening roller pair with a predetermined pressure from the width direction;
4. A third left / right correction roller pair for correcting a portion of the linear motion rail that is sandwiched by the third vertical correction roller pair from the width direction with a predetermined pressure. The high frequency heat treatment apparatus according to 1.
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