JP2018003091A - Hardening device of long shaft member - Google Patents

Hardening device of long shaft member Download PDF

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JP2018003091A
JP2018003091A JP2016131356A JP2016131356A JP2018003091A JP 2018003091 A JP2018003091 A JP 2018003091A JP 2016131356 A JP2016131356 A JP 2016131356A JP 2016131356 A JP2016131356 A JP 2016131356A JP 2018003091 A JP2018003091 A JP 2018003091A
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workpiece
long
cooling
coolant
quenching
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淳 吉富
Atsushi Yoshitomi
淳 吉富
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Toyota Motor Corp
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Toyota Motor Corp
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Abstract

PROBLEM TO BE SOLVED: To suppress generation of involuntary tempering due to residual heat on a part of a work W where hardening is completed in a hardening device having a heating part for heating a long shaft member such as the work W with a shaft shape (for example high frequency heating coil 1) and a cooling part for spraying a hardening liquid (for example cooling liquid L of the high frequency heating coil 1) to the long haft member after heating and hardening the same (cooling jacket 2).SOLUTION: A device has a recovery part (cooling liquid recovery part 3) for recovering a hardening liquid (cooling liquid L) sprayed toward a work W from a cooling part and scattered around with reflecting, and contacting the same to a part of the work W hardened again.SELECTED DRAWING: Figure 3

Description

本発明は、例えば車両の駆動系などに用いられるシャフトのような長軸部材の焼入れをする装置に関する。   The present invention relates to an apparatus for quenching a long shaft member such as a shaft used in a drive system of a vehicle, for example.

従来より、車両の駆動系などに用いられるシャフトには鉄鋼材料で形成され、その内部の粘さを保ちつつ表面の硬度を高めるために、いわゆる高周波焼入が行われたものがある。そして、このシャフトのような長軸部材の焼入装置として、例えば特許文献１には、シャフト状ワークを取り囲むリング状の高周波加熱コイル（加熱部）と、その加熱導体部に一体に設けられた冷却ジャケット（冷却部）とを備えたものが記載されている。   2. Description of the Related Art Conventionally, shafts used in vehicle drive systems and the like are made of steel materials and have been subjected to so-called induction hardening in order to increase the surface hardness while maintaining the internal viscosity. And as a hardening device of a long axis member like this shaft, for example, in patent documents 1, it was provided in one with the ring-shaped high frequency heating coil (heating part) surrounding a shaft-like work, and its heating conductor part. The thing provided with the cooling jacket (cooling part) is described.

この冷却ジャケットは、加熱後の長軸部材を急却するためのものであり、冷却液を複数の開口から加熱後のワークに向かって噴射するようになっている。そして、前記の焼入装置では、シャフト状ワークの基端側から先端側に向かって高周波加熱コイルを移動させ、ワークを加熱するとともに、その加熱後の部位に冷却ジャケットから冷却液を噴射して急冷することにより、焼入れを行う。   This cooling jacket is for suddenly retreating the heated long-axis member, and injects the coolant from the plurality of openings toward the heated workpiece. And in the said hardening apparatus, while moving a high frequency heating coil toward the front end side from the base end side of a shaft-shaped workpiece | work, while heating a workpiece | work, a cooling liquid is injected from the cooling jacket to the site | part after the heating. Quenching is performed by rapid cooling.

特開２００１−６４７２９号公報JP 2001-64729 A

ところが、前記のように長軸部材の外周面に向かって噴射された冷却液は、どうしても跳ね返って周囲に飛散するようになるので、長軸部材の残熱を取りきれないことがある。すなわち、前記従来例のように長軸部材の長手方向に高周波加熱コイルおよび冷却ジャケットを移動させながら、順に焼入れするようにした場合、その焼入後の表面に長軸部材の内部の残熱が伝わって、温度が上昇するようになる。   However, as described above, the coolant sprayed toward the outer peripheral surface of the long shaft member inevitably rebounds and scatters around, so that the residual heat of the long shaft member may not be completely removed. That is, when the high-frequency heating coil and the cooling jacket are moved in the longitudinal direction of the long-axis member as in the conventional example, the residual heat inside the long-axis member is formed on the surface after quenching. The temperature rises.

このように長軸部材の焼入れ後の表面に内部の残熱が伝わって温度が上昇すると、意図しない焼き戻しが発生してしまい、所用の硬度が得られないおそれがある。つまり、焼入れによる長軸部材の表面処理の効果が減退して、その強度や耐摩耗性などを十分に高めることができないおそれがあった。   As described above, when the internal residual heat is transmitted to the surface of the long shaft member after quenching and the temperature rises, unintentional tempering occurs, and the required hardness may not be obtained. That is, the effect of the surface treatment of the long shaft member by quenching may be reduced, and the strength and wear resistance may not be sufficiently improved.

かかる点に鑑みて本発明の目的は、加熱後に冷却液の噴き付けが終了した部位（焼入部位）をさらに適度に冷却することによって、内部の残熱による焼き戻しの発生を抑制することにある。   In view of this point, an object of the present invention is to suppress the occurrence of tempering due to internal residual heat by further appropriately cooling a portion (quenched portion) where the spraying of the cooling liquid has been completed after heating. is there.

前記の目的を達成するために本発明は、長軸部材を加熱する加熱部と、加熱後の長軸部材に焼入液を噴射して焼入れする冷却部と、を備えた長軸部材の焼入装置が対象であって、前記冷却部において長軸部材に向かって噴射され、その周囲に飛散した焼入液を回収して、前記長軸部材の焼入れされた部位に再度、接触させる回収部を備えたものである。   In order to achieve the above-described object, the present invention provides a heating unit for heating a long-axis member, and a quenching unit for a long-axis member that includes a cooling unit for injecting and quenching a quenching liquid onto the heated long-axis member. A recovery unit that is a target for a quenching device, collects the quenching liquid sprayed around the long-axis member in the cooling unit, and scatters around the long-axis member, and again makes contact with the quenched part of the long-axis member It is equipped with.

前記のように構成された焼入装置では、加熱部によって加熱された長軸部材に、冷却部において焼入液（通常は水または、水にポリアルキレングリコールを数％混ぜたクーラントなどの冷却液）が噴射され、焼入れが行われるとともに、その後、周囲に飛散した焼入液が回収部によって回収されて、長軸部材の焼入れされた部位に再度、接触させられる。これにより、焼入れされた部位が適度に冷却されることになり、その内部の残熱による意図しない焼き戻しの発生を抑制できる。   In the quenching apparatus configured as described above, a quenching liquid (usually water or a coolant such as a coolant in which polyalkylene glycol is mixed with water at several percent) is added to the long shaft member heated by the heating unit in the cooling unit. ) Is injected and quenching is performed, and thereafter, the quenching liquid scattered around is recovered by the recovery unit and brought into contact with the quenched part of the long shaft member again. Thereby, the hardened site | part will be cooled moderately and generation | occurrence | production of the unintentional tempering by the residual heat of the inside can be suppressed.

すなわち、好ましくは長軸部材を上下方向に向けて配置し、その所定部位を加熱しながら、加熱後の部位に焼入液を噴射して急冷するとともに、そこから跳ね返って周囲に飛散する焼入液を皿状の容器で受け止めて再度、長軸部材に接触させるようにすればよい。この場合、長軸部材を下方に向かって移動させ、その所定部位を下側から上側に順に加熱および冷却するようにしてもよく、また、長軸部材は固定しておいて、加熱部および冷却部を上方に向かって移動させるようにしてもよい。   That is, preferably, the long shaft member is arranged in the vertical direction, and while heating the predetermined part, the quenching liquid is jetted to the heated part and rapidly cooled, and the quenching is rebounded and scattered to the surroundings. The liquid may be received by a dish-shaped container and contacted with the long shaft member again. In this case, the long-axis member may be moved downward, and the predetermined portion may be heated and cooled sequentially from the lower side to the upper side. The part may be moved upward.

以上、説明したように本発明に係る長軸部材の焼入装置は、加熱した長軸部材に焼入液を噴射して急冷するだけでなく、その周囲に飛散した焼入液を回収して再度、長軸部材に接触させるようにしたので、焼入れした後の部位を適度に冷却し、内部の残熱による意図しない焼き戻しの発生を抑制することができる。よって、焼入れによる長軸部材の表面処理の効果を確保し、その強度や耐摩耗性などを十分に高めることができる。   As described above, the long-axis member quenching apparatus according to the present invention not only injects the quenching liquid onto the heated long-axis member and quenches it rapidly, but also collects the quenching liquid scattered around it. Since it was made to contact again with a long axis member, the site | part after quenching can be cooled appropriately and generation | occurrence | production of the unintentional tempering by an internal residual heat can be suppressed. Therefore, the effect of the surface treatment of the long shaft member by quenching can be ensured, and the strength and wear resistance can be sufficiently enhanced.

本発明の実施の形態に係る焼入装置の要部を示す概略構成図であり、ワークの下端部を加熱している状態を示す。It is a schematic block diagram which shows the principal part of the hardening apparatus which concerns on embodiment of this invention, and shows the state which is heating the lower end part of a workpiece | work. ワークの中間部を加熱しながら、その下端部を急冷（焼入れ）している状態を示す図１相当図である。FIG. 2 is a view corresponding to FIG. 1 showing a state where a lower end portion of the workpiece is rapidly cooled (quenched) while heating an intermediate portion of the workpiece. 加熱したワークの中間部を急冷している状態を示す図１相当図である。FIG. 2 is a view corresponding to FIG. 1 showing a state where an intermediate portion of a heated workpiece is rapidly cooled. 飛散した冷却液を冷却液回収部に溜めて、ワークに接触させるようにした他の実施形態に係る図３相当図である。FIG. 5 is a view corresponding to FIG. 3 according to another embodiment in which the scattered coolant is accumulated in the coolant recovery unit and brought into contact with the workpiece.

以下、本発明の実施の形態を図面に基づいて説明する。本実施の形態では、車両の駆動系に備わるシャフトの高周波焼入に本発明を適用した場合について説明する。なお、このシャフトになるワークＷは、例えば機械構造用炭素鋼などの金属材料からなり、中実または中空の長軸部材であって、その一端側の所定範囲に表面の硬度を高めるための高周波焼入が施される。   Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the present embodiment, a case where the present invention is applied to induction hardening of a shaft provided in a drive system of a vehicle will be described. In addition, the workpiece | work W used as this shaft consists of metal materials, such as carbon steel for machine structures, for example, is a solid or hollow long-axis member, Comprising: The high frequency for raising the surface hardness to the predetermined range of the one end side Quenching is performed.

−焼入装置の主要部−
図１には概略的に示すように本実施の形態の焼入装置は、上下方向に向けて保持したワークＷを下方に向かって移動させ、高周波加熱コイル１（加熱部）の中を通過させて誘導電流により表面を加熱するものである。高周波加熱コイル１は従来から公知のもので、ワークＷよりも大径のリング状またはコイル状に形成された加熱導体部１１を有しており、その端部が一対の給電導体部１２によって高周波電源１３に接続されている。 -Main parts of quenching equipment-
As schematically shown in FIG. 1, the quenching apparatus of the present embodiment moves the workpiece W held in the vertical direction downward and passes it through the high-frequency heating coil 1 (heating unit). The surface is heated by induced current. The high-frequency heating coil 1 is conventionally known and has a heating conductor portion 11 formed in a ring shape or a coil shape having a diameter larger than that of the workpiece W. Connected to a power source 13.

図示の例では高周波加熱コイル１の外周を取り囲むように冷却ジャケット２が設けられており、その内部を流れる冷却液Ｌを利用して、前記のように加熱されて所定温度以上になったワークＷを急冷、即ち焼入れするようになっている。詳細は図示しないが、冷却ジャケット２は、高周波加熱コイル１よりも大径のリング状であり、その内部には周方向全体に冷却液Ｌの流路２１が形成されて、給水路２２によりポンプ２３から冷却液Ｌが供給されるようになっている。   In the illustrated example, a cooling jacket 2 is provided so as to surround the outer periphery of the high-frequency heating coil 1, and the workpiece W heated to a predetermined temperature or higher as described above by using the coolant L flowing through the inside thereof. Is quenched, that is, quenched. Although not shown in detail, the cooling jacket 2 has a ring shape larger in diameter than the high-frequency heating coil 1, and a flow path 21 for the cooling liquid L is formed in the entire circumferential direction, and is pumped by the water supply path 22. The coolant L is supplied from 23.

また、冷却ジャケット２の下部の内周側には、下方に向かって拡径するようなテーパ面２ａが全周に亘って形成され、ここには周方向に所定の間隔を空けて複数の開口２４が設けられている。これらの開口２４は、それぞれ冷却ジャケット２の内部の流路２１に連通しており、流通する冷却液ＬをワークＷの外周面に向かって噴射する。つまり、ワークＷの外周を取り囲む冷却ジャケット２の複数の開口２４から、それぞれワークＷの移動方向（図示の例では下方）に向かって、即ち斜め下向きに冷却液Ｌが噴射される。   In addition, a tapered surface 2a that expands downward is formed on the inner peripheral side of the lower portion of the cooling jacket 2 over the entire circumference, and there are a plurality of openings at predetermined intervals in the circumferential direction. 24 is provided. Each of these openings 24 communicates with the flow path 21 inside the cooling jacket 2 and injects the circulating coolant L toward the outer peripheral surface of the workpiece W. That is, the coolant L is sprayed from the plurality of openings 24 of the cooling jacket 2 surrounding the outer periphery of the workpiece W in the moving direction of the workpiece W (downward in the illustrated example), that is, obliquely downward.

なお、ワークＷは、その上下両端部あるいは上下いずれかの端部を図示しないチャックやセンターピンなどによって把持されており、これも図示しない移動機構によって一定の速度で下方に移動させられる。この移動機構としては、例えば送りネジと、これによってスライドさせられるスライダと、送りネジを回転駆動するモータとを有するものが挙げられる。スライダに前記のチャックが取り付けられていて、モータによって送りネジが回転駆動されると、ワークＷが制御された速度で移動するようになる。   The workpiece W is held at both upper and lower end portions or upper and lower end portions by a chuck or a center pin (not shown), and is also moved downward at a constant speed by a moving mechanism (not shown). As this moving mechanism, for example, a mechanism having a feed screw, a slider that is slid by this, and a motor that rotationally drives the feed screw can be cited. When the chuck is attached to the slider and the feed screw is driven to rotate by the motor, the workpiece W moves at a controlled speed.

そうして下方に移動させられるワークＷに対して、図２および図３に示すように高周波加熱コイル１の外周の冷却ジャケット２から前記のように斜め下向きに冷却液Ｌが噴射されることで、高周波加熱コイル１によって所定温度以上に加熱された部位に冷却液Ｌを直接、噴き付けて急冷することができる。すなわち、いわゆるＡ３変態点を超えた鉄鋼材料を急冷、即ち焼入れすることで、その硬度を高めるものである。   As shown in FIGS. 2 and 3, the coolant L is injected obliquely downward as described above from the cooling jacket 2 on the outer periphery of the high-frequency heating coil 1 as shown in FIGS. 2 and 3. The coolant L can be sprayed directly on the portion heated to a predetermined temperature or higher by the high-frequency heating coil 1 for rapid cooling. That is, the hardness of the steel material exceeding the so-called A3 transformation point is increased by quenching, ie, quenching.

但し、そのようにしてワークＷの外周面に噴き付けられる冷却液Ｌは、図２、３に模式的に示すように跳ね返って、周囲に飛散するようになるので、前記のように下方に移動させながらワークＷを加熱および急冷するようにした場合、焼入れが終了した表面にワークＷの内部の残熱が伝わることにより、その温度が上昇して意図しない焼き戻しが発生するおそれがあった。   However, the coolant L sprayed on the outer peripheral surface of the workpiece W in such a manner rebounds as shown schematically in FIGS. 2 and 3 and scatters around, so that it moves downward as described above. When the workpiece W is heated and rapidly cooled while being heated, the residual heat inside the workpiece W is transmitted to the surface where the quenching has been completed, which may increase the temperature and cause unintended tempering.

すなわち、図２に示すように冷却液Ｌが噴き付けられている部位（同図では下端部）は急冷されて、その表面の硬度が高くなるものの、その後、図３に示すように下方に移動したワークＷの下端側の部分においては、内部の残熱が表面に伝わることによって、その温度が上昇するからである。

この点に着目して本実施の形態では、前記のようにワークＷの周囲に飛散する冷却液Ｌを回収し、これを焼入れの終了したワークＷの下側の部位に接触させて、残熱による温度上昇を抑制するようにした。すなわち、前記の図１〜３にそれぞれ表れているように本実施の形態では、高周波加熱コイル１や冷却ジャケット２の下方に所定の間隔を空けて、リング状の冷却液回収部３（回収部）を設けている。 That is, as shown in FIG. 2, the portion where the coolant L is sprayed (the lower end in the figure) is rapidly cooled to increase the hardness of the surface, but then moves downward as shown in FIG. This is because, in the portion on the lower end side of the workpiece W, the temperature rises as the internal residual heat is transmitted to the surface.

Focusing on this point, in the present embodiment, as described above, the coolant L scattered around the work W is collected, and this is brought into contact with the lower part of the work W after quenching, so that the residual heat The temperature rise due to was suppressed. That is, as shown in FIGS. 1 to 3, in the present embodiment, a ring-shaped coolant recovery unit 3 (recovery unit) is provided below the high-frequency heating coil 1 and the cooling jacket 2 with a predetermined interval. ).

この冷却液回収部３は、外径が前記冷却ジャケット２と同じくらいの大きさで、内径は前記高周波加熱コイル１と同じくらいであり、その内周縁部はワークＷの外周面に近接しつつ、冷却液Ｌの流通する所定の隙間が形成されている。そして、冷却液回収部３の上面には内周側ほど低くなるように傾斜するテーパ面３ａが形成され、冷却液Ｌを内周側に流下させるようになっている。   The coolant recovery unit 3 has an outer diameter as large as that of the cooling jacket 2 and an inner diameter as large as that of the high-frequency heating coil 1, and its inner peripheral edge is close to the outer peripheral surface of the workpiece W. A predetermined gap through which the coolant L flows is formed. And the taper surface 3a which inclines so that it may become so low that the inner peripheral side is formed in the upper surface of the cooling fluid collection | recovery part 3, and the cooling fluid L is made to flow down to the inner peripheral side.

そして、図２、３に表れているように冷却ジャケット２からその下方の冷却液回収部３までの間隔Ｈは、その冷却ジャケット２から斜め下向きに噴射された冷却液ＬがワークＷの外周面に衝突するまでの高さの変化ｈの２倍よりも小さく設定されている。これにより、ワークＷの外周面に衝突して跳ね返った冷却液Ｌが冷却液回収部３のテーパ面３ａに受け止められて、その内周側に流れるようになる。   2 and 3, the interval H from the cooling jacket 2 to the cooling liquid recovery unit 3 below the cooling jacket 2 is such that the cooling liquid L injected obliquely downward from the cooling jacket 2 is the outer peripheral surface of the workpiece W. Is set to be smaller than twice the change in height h until it collides. As a result, the cooling liquid L that has collided and bounced off the outer peripheral surface of the workpiece W is received by the tapered surface 3a of the cooling liquid recovery unit 3 and flows toward the inner peripheral side.

こうしてワークＷの周囲に飛散した冷却液Ｌが冷却液回収部３（特にそのテーパ面３ａ）によって回収され、その上面のテーパ面３ａを内周側に流れて、内周縁部から近接するワークＷの外周面との隙間を通過し、下方に流れるようになる。このとき冷却液Ｌの多くがワークＷの外周面に沿って流下するので、その内部から伝わってきた残熱を適度に取り除く、即ちワークＷを適度に冷却することができる。   The coolant L thus scattered around the workpiece W is recovered by the coolant recovery unit 3 (particularly, the tapered surface 3a), flows through the tapered surface 3a on the upper surface to the inner peripheral side, and approaches the workpiece W adjacent to the inner peripheral edge. Passes through the gap with the outer peripheral surface of the gas and flows downward. At this time, most of the cooling liquid L flows down along the outer peripheral surface of the workpiece W, so that the residual heat transmitted from the inside can be removed appropriately, that is, the workpiece W can be cooled appropriately.

なお、そうしてワークＷの外周面に沿って流下した冷却液Ｌは、ワークＷの下端部から下方の冷却液受け皿４にまで流下した後に、排水路４１によってポンプ２３へと還流される。また、前記の冷却液回収部３は、本実施の形態では図１〜３の左右に２分割されており、可動ステージ３１，３２に載置されている。図示の例では右側の可動ステージ３２が前記ワークＷの移動機構と同様の機構によって移動されるようになっている。   The coolant L that has flowed down along the outer peripheral surface of the workpiece W then flows down from the lower end portion of the workpiece W to the coolant receiving tray 4 below, and is then returned to the pump 23 by the drainage channel 41. In the present embodiment, the coolant recovery unit 3 is divided into left and right parts of FIGS. 1 to 3 and is placed on movable stages 31 and 32. In the illustrated example, the right movable stage 32 is moved by a mechanism similar to the moving mechanism of the workpiece W.

−高周波焼入−
上述した構成の焼入装置によるワークＷの高周波焼入れについて簡単に説明すると、まず、ワークＷの上下両端部（あるいはいずれか一方の端部）を図示しないチャックやセンターピンにより把持して、その下端部が高周波加熱コイル１の内周側に位置するように配置する。すなわち、図１に表れているように、ワークＷの下端部を高周波加熱コイル１の近傍に位置づけて、この下端部から高周波焼入を開始する。 -Induction hardening-
The induction hardening of the workpiece W by the quenching apparatus having the above-described configuration will be briefly described. First, the upper and lower ends (or either one of the ends) of the workpiece W are gripped by a chuck or a center pin (not shown), and the lower ends thereof. It arrange | positions so that a part may be located in the inner peripheral side of the high frequency heating coil 1. FIG. That is, as shown in FIG. 1, the lower end portion of the workpiece W is positioned in the vicinity of the high frequency heating coil 1, and induction hardening is started from this lower end portion.

すなわち、高周波電源１３をオンにすることで、高周波加熱コイル１に高周波電流が流れて、誘導電流によりワークＷの下端部近傍の外周側（表面付近）が加熱されるようになる。この際、初めはワークＷを移動させない停止加熱を行い、所定の時間が経過すればワークＷの下方への移動を開始するのが好ましい。そして、ワークＷが所定距離だけ移動すると、図２に表れているようにその下端部に冷却ジャケット２から噴射された冷却液Ｌが噴き付けられるようになる。   That is, by turning on the high-frequency power supply 13, a high-frequency current flows through the high-frequency heating coil 1, and the outer peripheral side (near the surface) near the lower end of the workpiece W is heated by the induced current. At this time, it is preferable to perform stop heating without moving the workpiece W at the beginning, and to start moving the workpiece W downward when a predetermined time has elapsed. When the workpiece W moves by a predetermined distance, as shown in FIG. 2, the coolant L sprayed from the cooling jacket 2 is sprayed to the lower end portion thereof.

そうして冷却ジャケット２から噴射された冷却液ＬがワークＷの下端部、即ち所定温度以上に加熱された部分に衝突して、これを急冷（即ち焼入れ）した後に跳ね返るようになるが、図２、３を参照して上述したように飛散する冷却液Ｌは冷却液回収部３の上面のテーパ面３ａに受け止められ、内周側に流れて内周縁部から近接するワークＷの外周面に供給されるようになる。   Then, the coolant L sprayed from the cooling jacket 2 collides with the lower end portion of the workpiece W, that is, a portion heated to a predetermined temperature or more, and after being rapidly cooled (that is, quenched), it rebounds. As described above with reference to FIGS. 2 and 3, the coolant L scattered is received by the tapered surface 3 a on the upper surface of the coolant recovery unit 3 and flows to the outer peripheral surface of the workpiece W that flows to the inner peripheral side and is close to the inner peripheral edge. Will be supplied.

つまり、ワークＷの外周面を急冷してその周囲に飛散した冷却液Ｌが、冷却液回収部３によって回収され、既に焼入れされた部位に再度、接触させられることになり、これにより、焼入れされた表面に内部から伝わってきた残熱を適度に取り除くことができる。このようにしてワークＷの移動が完了すれば、即ちワークＷの高周波焼入が完了すれば、その端部のチャックまたはセンターピンによる把持を解除し、新たなワークＷへの交換を行う。   That is, the coolant L that has rapidly cooled the outer peripheral surface of the workpiece W and scattered around the workpiece W is recovered by the coolant recovery unit 3 and brought into contact with the already quenched portion, thereby being quenched. Residual heat transmitted from the inside to the surface can be removed appropriately. When the movement of the workpiece W is completed in this way, that is, when induction hardening of the workpiece W is completed, the gripping of the end portion by the chuck or the center pin is released, and replacement with a new workpiece W is performed.

したがって、本実施の形態の焼入装置によると、シャフト状のワークＷを高周波加熱コイル１によって加熱した後に、冷却液Ｌを噴射して焼入れするとともに、跳ね返って周囲に飛散する冷却液Ｌを回収して再度、焼入れした部位に接触させるようにしたから、この部位を適度に冷却し、内部の残熱による意図しない焼き戻しの発生を抑制することができる。これにより、焼入れによるワークＷの表面処理の効果を確保し、その強度や耐摩耗性などを十分に高めることができる。   Therefore, according to the quenching apparatus of the present embodiment, after the shaft-shaped workpiece W is heated by the high-frequency heating coil 1, the coolant L is injected and quenched, and the coolant L that rebounds and scatters around is recovered. And since it was made to contact again the quenching site | part, this site | part can be cooled moderately and generation | occurrence | production of the unintentional tempering by an internal residual heat can be suppressed. Thereby, the effect of the surface treatment of the workpiece | work W by hardening can be ensured, and the intensity | strength, abrasion resistance, etc. can fully be improved.

−他の実施形態−
上述した実施の形態の記載はあくまで例示に過ぎず、本発明の構成や用途などについても限定することを意図しない。例えば前記実施の形態では、高周波加熱コイル１の冷却液Ｌを利用して、ワークＷの焼入れを行うようにしているが、これに限らず、ワークＷに噴射する冷却液Ｌは高周波加熱コイル１の冷却液とは別系統にしてもよい。 -Other embodiments-
The description of the above-described embodiment is merely an example, and is not intended to limit the configuration or use of the present invention. For example, in the above-described embodiment, the workpiece W is hardened by using the coolant L of the high-frequency heating coil 1. However, the present invention is not limited to this, and the coolant L injected to the workpiece W is not limited to the high-frequency heating coil 1. A separate system from the coolant may be used.

また、前記実施の形態では、冷却液回収部３の上面にテーパ面３ａを形成し、その内周側に冷却液Ｌを流してワークＷに接触させるようにしているが、これにも限定されない。例えば図４に示すように、冷却液回収部５には上方に開放された冷却液溜まり５ａを形成し、ワークＷの周囲に飛散した冷却液Ｌを一時的に貯留しながら再度、ワークＷに接触させるようにしてもよい。   Moreover, in the said embodiment, although the taper surface 3a is formed in the upper surface of the cooling fluid collection | recovery part 3, it is made to flow the cooling fluid L to the inner peripheral side and to make it contact with the workpiece | work W, It is not limited to this. . For example, as shown in FIG. 4, a coolant reservoir 5 a opened upward is formed in the coolant recovery unit 5, and the coolant L scattered around the workpiece W is temporarily stored in the workpiece W again while temporarily storing the coolant L. You may make it contact.

さらに、前記実施の形態ではシャフト状のワークＷを上下方向に向けて配置し、これを下方に移動させながら高周波加熱コイル１によって加熱し、冷却ジャケット２から噴射する冷却液Ｌによって急冷するようにしているが、これにも限定されず、ワークＷを固定して高周波加熱コイル１および冷却ジャケット２を移動させるようにしてもよく、この場合に冷却液回収部３は固定してもよいし、高周波加熱コイル１などと共に移動させるようにしてもよい。また、ワークＷは横向きに配置してもよい。   Furthermore, in the above-described embodiment, the shaft-like workpiece W is arranged in the vertical direction, heated by the high-frequency heating coil 1 while being moved downward, and rapidly cooled by the cooling liquid L sprayed from the cooling jacket 2. However, the present invention is not limited to this, and the high frequency heating coil 1 and the cooling jacket 2 may be moved while fixing the work W. In this case, the coolant recovery unit 3 may be fixed, You may make it move with the high frequency heating coil 1 grade | etc.,. Further, the workpiece W may be arranged sideways.

さらにまた前記実施の形態ではワークＷを高周波加熱コイル１によって加熱するようにしているが、これにも限定されず、例えば加熱炉などによってワークＷを加熱するようにしてもよい。   Furthermore, although the workpiece W is heated by the high-frequency heating coil 1 in the above embodiment, the present invention is not limited to this. For example, the workpiece W may be heated by a heating furnace or the like.

本発明は、例えば車両の駆動系などに用いられるシャフトなど、長軸部材の焼入れに関連し、その内部の残熱による意図しない焼き戻しの発生を抑制して、熱処理による効果を確保する上で有利なものなので、産業状の利用可能性は高い。   The present invention relates to quenching of a long shaft member such as a shaft used in a drive system of a vehicle, for example, and suppresses the occurrence of unintentional tempering due to the residual heat inside thereof, thereby ensuring the effect of heat treatment. Since it is advantageous, the industrial applicability is high.

１ 高周波加熱コイル（加熱部）
２ 冷却ジャケット（冷却部）
３，５ 冷却液回収部（回収部）
Ｗ シャフト状のワーク（長軸部材） 1 High-frequency heating coil (heating unit)
2 Cooling jacket (cooling part)
3,5 Coolant recovery part (recovery part)
W Shaft-like workpiece (long shaft member)

Claims (1)

長軸部材を加熱する加熱部と、加熱後の長軸部材に焼入液を噴射して焼入れする冷却部と、を備えた長軸部材の焼入装置であって、
前記冷却部において長軸部材に向かって噴射され、その周囲に飛散した焼入液を回収して、前記長軸部材の焼入れされた部位に再度、接触させる回収部を備えることを特徴とする長軸部材の焼入装置。 A long-axis member quenching apparatus comprising: a heating unit that heats the long-axis member; and a cooling unit that injects and quenches the quenching liquid onto the heated long-axis member,
A long unit comprising a recovery unit that recovers the quenching liquid that is sprayed toward the long-axis member in the cooling unit and scattered around the long-axis member, and contacts the quenched part of the long-axis member again. A quenching device for shaft members.
JP2016131356A 2016-07-01 2016-07-01 Hardening device of long shaft member Pending JP2018003091A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019187765A1 (en) * 2018-03-26 2019-10-03 日本製鉄株式会社 Traverse hardening device
KR20200089390A (en) * 2019-01-17 2020-07-27 주식회사 디씨에프 트랙 Track bush manufacturing method based on high frequency heat treatment
CN113736977A (en) * 2021-11-05 2021-12-03 太原科技大学 Thick-wall straight welded pipe heat treatment device and method
KR20220063968A (en) * 2020-11-11 2022-05-18 왕현철 Temperature control system of ultrasonic horn for facial mask manufacturing

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019187765A1 (en) * 2018-03-26 2019-10-03 日本製鉄株式会社 Traverse hardening device
JPWO2019187765A1 (en) * 2018-03-26 2021-03-11 日本製鉄株式会社 Mobile quenching device
JP2022075967A (en) * 2018-03-26 2022-05-18 日本製鉄株式会社 Scanning hardening device
JP7092185B2 (en) 2018-03-26 2022-06-28 日本製鉄株式会社 Mobile quenching device
KR20200089390A (en) * 2019-01-17 2020-07-27 주식회사 디씨에프 트랙 Track bush manufacturing method based on high frequency heat treatment
KR102206381B1 (en) 2019-01-17 2021-01-22 주식회사 디씨에프 트랙 Track bush manufacturing method based on high frequency heat treatment
KR20220063968A (en) * 2020-11-11 2022-05-18 왕현철 Temperature control system of ultrasonic horn for facial mask manufacturing
CN113736977A (en) * 2021-11-05 2021-12-03 太原科技大学 Thick-wall straight welded pipe heat treatment device and method
CN113736977B (en) * 2021-11-05 2022-02-01 太原科技大学 Thick-wall straight welded pipe heat treatment device and method

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