JPS6376821A - Method and apparatus for high frequency quenching of hollow shaft - Google Patents
Method and apparatus for high frequency quenching of hollow shaftInfo
- Publication number
- JPS6376821A JPS6376821A JP61220016A JP22001686A JPS6376821A JP S6376821 A JPS6376821 A JP S6376821A JP 61220016 A JP61220016 A JP 61220016A JP 22001686 A JP22001686 A JP 22001686A JP S6376821 A JPS6376821 A JP S6376821A
- Authority
- JP
- Japan
- Prior art keywords
- hollow shaft
- hollow
- thin
- wall portion
- shaft
- 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.)
- Granted
Links
- 238000010791 quenching Methods 0.000 title claims abstract description 12
- 230000000171 quenching effect Effects 0.000 title claims abstract description 12
- 238000000034 method Methods 0.000 title claims description 6
- 239000000110 cooling liquid Substances 0.000 claims abstract description 15
- 238000010438 heat treatment Methods 0.000 claims abstract description 12
- 230000000149 penetrating effect Effects 0.000 claims abstract description 4
- 230000006698 induction Effects 0.000 claims description 6
- 238000001816 cooling Methods 0.000 abstract description 17
- 239000007788 liquid Substances 0.000 abstract description 3
- 238000002347 injection Methods 0.000 abstract 2
- 239000007924 injection Substances 0.000 abstract 2
- 230000000630 rising effect Effects 0.000 abstract 1
- 239000002826 coolant Substances 0.000 description 20
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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
Abstract
Description
【発明の詳細な説明】
童栗上段且工光立
本発明は、内周部あるいは外周部が段付き形状で、薄肉
部と厚肉部を有する中空シャフトを高周波で焼入れする
中空シャフトの高周波焼入装置及及びその装置に関する
。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an induction quenching process for a hollow shaft in which a hollow shaft having a stepped inner circumference or outer circumference and a thin wall part and a thick wall part is hardened at a high frequency. Regarding input devices and their devices.
従米狭±
従来のこの種焼入装置は、焼入れの高周波電流が高い場
合には表面だけが焼入れされて内面側が焼入れされにく
く、また、高周波電流は高周波になればなるほど表面だ
けしか流れないので、このため、中空シャフトの薄肉部
と厚肉部に、加熱コイルによって、その部分に適応した
異なる周波数の二つの高周波電流を別々にあてて焼入れ
を行っていた。Conventional hardening equipment of this type, when the high frequency current for hardening is high, only the surface is hardened and it is difficult to harden the inside side, and the higher the frequency, the more the high frequency current flows only on the surface. For this reason, the thin-walled portion and the thick-walled portion of the hollow shaft are hardened by separately applying two high-frequency currents of different frequencies adapted to those portions using a heating coil.
■がＲ’４？ しようとする□ｒｆ４ところが、上記
のように、中空シャフトの薄肉部と厚肉部に異なる周波
数の高周波電流を別々にあてるには、別個の加熱コイル
を必要とし、また、それぞれの加熱コイルに別々の異な
る電流が必要であり、このために、その装置が複雑とな
り、しかもその焼入れ作業が困難であるといった問題点
があった。■Is it R'4? □rf4However, as mentioned above, in order to apply high-frequency currents of different frequencies to the thin and thick parts of the hollow shaft, separate heating coils are required, and each heating coil needs to be Different currents are required, which makes the device complicated and the hardening operation difficult.
一方、同一周波数の高周波電流にて中空シャフトの薄肉
部と厚肉部の焼入れを行、うことは、非常に困難であっ
た。On the other hand, it is extremely difficult to harden the thin and thick portions of a hollow shaft using a high-frequency current of the same frequency.
本発明は、上記実情に鑑みなされたものであって、中空
シャフトの薄肉部の縁端部側から中空内部に冷却液を噴
出して焼入れを行うことによって、同一周波数の高周波
電流で同時に焼入れすることが可能となり、しかも中空
シャフトの安定支持ができ、かつ、装置自体の加熱時の
温度上昇を無くした中空シャフトの高周波焼入方法及び
その装置を提供することを主な目的としている。The present invention has been made in view of the above-mentioned circumstances, and by ejecting a cooling liquid into the hollow interior from the edge side of the thin-walled portion of the hollow shaft to perform hardening, the present invention simultaneously hardens with a high-frequency current of the same frequency. The main object of the present invention is to provide an induction hardening method for a hollow shaft and an apparatus for the same, which enables stable support of the hollow shaft and eliminates temperature rise during heating of the apparatus itself.
４ 占を２するための
本発明は、上記目的を達成するために、その方法として
、同一周波数電流で前記中空シャフトを焼入れする一方
、該焼入れ時に、中空シャフトの薄肉部端縁側から中空
内部に冷却液を噴出して中空シャフトの薄肉部の焼入れ
と前記厚内部の焼入れを同一周波数電流にて同時に行う
ようにした。4. In order to achieve the above object, the present invention is to harden the hollow shaft with a current of the same frequency, and at the time of hardening, to heat the inside of the hollow shaft from the edge side of the thin part of the hollow shaft. The cooling liquid was ejected to simultaneously harden the thin-walled portion of the hollow shaft and harden the thick inside using the same frequency current.
また、その装置は、前記中空シャフトを回転支持し、上
部より下部に貫通する中空排液孔を有する回転支持体と
、前記中空シャフトの薄肉部上縁端側の中空部内に配設
された冷却液噴出管と、中空シャブトの外面近傍に配設
された加熱コイルとを具備したものである。The device also includes a rotary support body that rotatably supports the hollow shaft and has a hollow drainage hole penetrating from the upper part to the lower part, and a cooling member disposed in the hollow part on the upper edge side of the thin-walled part of the hollow shaft. It is equipped with a liquid ejection pipe and a heating coil disposed near the outer surface of a hollow shaft.
■
しかして、焼入れ時に、中空シャフトの薄肉部端縁側か
ら中空内部に冷却液を噴出して中空シャフトの薄肉部の
焼入れと前記厚肉部の焼入れを同一周波数電流にて同時
に行う。(2) During quenching, a cooling liquid is ejected from the edge of the thin-walled portion of the hollow shaft into the hollow interior, and the thin-walled portion and the thick-walled portion of the hollow shaft are simultaneously quenched using the same frequency current.
２崖班 以下、本発明の実施例を図面に基づいて説明する。2 cliff group Embodiments of the present invention will be described below based on the drawings.
第１図は、本実施例に係る焼入装置の一部断面した正面
図、第２図は中空シャフトの一部断面した平面図である
。FIG. 1 is a partially sectional front view of a hardening apparatus according to this embodiment, and FIG. 2 is a partially sectional plan view of a hollow shaft.
本装置により焼入れされる中空シャフト１は、外周が段
付形状をなし、小径の薄肉部１１と大径の厚肉部１２と
鍔部１３と円筒状突出部１４とからなり、内部は上下に
貫通した中空部１５となっている。The hollow shaft 1 to be hardened by this device has a stepped outer periphery, and is composed of a small-diameter thin wall portion 11, a large-diameter thick wall portion 12, a flange portion 13, and a cylindrical protrusion portion 14. It has a hollow part 15 that passes through it.
本装置の加熱コイル２は、前記中空シャフト１の外面近
傍に配置され、前記段付形状の外周に対応した形状をな
しており、図示しない電源により、高周波電流を発生す
る。The heating coil 2 of this device is arranged near the outer surface of the hollow shaft 1, has a shape corresponding to the outer periphery of the stepped shape, and generates a high frequency current by a power source (not shown).
また、前記中空シャフト１を回転支持する回転支持体３
には、その上部面に、中空シャフト１の下部の形状に対
応した支持凹部３１が形成されると共に上部より下部に
貫通する中空排液孔３２が形成されて、図示しない駆動
モータにて回転駆動される。Further, a rotation support body 3 that rotationally supports the hollow shaft 1 is provided.
A support recess 31 corresponding to the shape of the lower part of the hollow shaft 1 is formed in the upper surface of the holder, and a hollow drain hole 32 is formed that penetrates from the upper part to the lower part, and is rotated by a drive motor (not shown). be done.
一方、前記回転支持体３に中空シャフト１を支持した状
態において、中空シャフト１の薄肉部１１の上縁端側に
は、内部が中空の筒状をなし、その先端（下端）部を複
数の噴出孔４１を有する端壁部４２となした冷却液噴出
管４が配設される。On the other hand, when the hollow shaft 1 is supported on the rotary support 3, the upper edge side of the thin wall portion 11 of the hollow shaft 1 has a hollow cylindrical shape, and its tip (lower end) is connected to a plurality of tubes. A coolant spouting pipe 4 having an end wall portion 42 having a spouting hole 41 is provided.
前記噴出孔４１は、下方斜め外側向きに形成され、前記
中空シャフト１の薄肉部１１の上端部分の内向きテーパ
部１１ａの下方近傍にその噴出出口が位置している。ま
た、前記冷却液噴出管４の端壁部４２外周縁部は、前記
中空シャフト１の薄肉部ｌｌ上縁端の内向きテーパ部１
１ａと対応した形状のテーパ部４２ａとなっている。The ejection hole 41 is formed downward and diagonally outward, and its ejection outlet is located near the bottom of the inwardly tapered portion 11a of the upper end portion of the thin wall portion 11 of the hollow shaft 1. Further, the outer peripheral edge of the end wall portion 42 of the coolant jet pipe 4 has an inwardly tapered portion 1 at the upper edge of the thin wall portion ll of the hollow shaft 1.
The tapered portion 42a has a shape corresponding to 1a.
″前記中子シャフト１の外周外側には、焼入れ後の冷却
用の外周冷却ジャケット５が配置される。``On the outside of the outer circumference of the core shaft 1, an outer circumferential cooling jacket 5 for cooling after quenching is arranged.
また、前記冷却液噴出管４はその上端にてロータリージ
ヨイント６に連結されて回転可能に構成されている。Further, the coolant jetting pipe 4 is connected to a rotary joint 6 at its upper end so as to be rotatable.
図中、７は冷却液ポンプであって、該冷却液ポンプ７か
ら冷却液タンク８に配管されていると共に、前記冷却液
噴出管４に内面冷却用電磁弁９ａを介して配管され、該
配管の冷却液ポンプ側から前記外周冷却ジャケット５に
外周冷却用電磁弁９ｂを介して配管されている。In the figure, reference numeral 7 denotes a coolant pump, which is piped from the coolant pump 7 to a coolant tank 8, and is also piped to the coolant jet pipe 4 via a solenoid valve 9a for internal cooling. The cooling liquid pump side is connected to the outer cooling jacket 5 via an outer cooling solenoid valve 9b.
しかして、上記構成により、中空シャフト１を回転支持
体３の支持凹部３１に載せて支持し、回転支持体３を回
転駆動して中空シャフト１を回転させ加熱コイル２にて
高周波電流で焼入れすると共に、内面冷却用電磁弁９ａ
を開いて冷却液ポンプ７にて冷却液噴出管４の噴出孔４
１より中空シャフト１の薄肉部１１の上縁端側から中空
内部に冷却液を噴出させる。With the above configuration, the hollow shaft 1 is supported by being placed on the support recess 31 of the rotary support 3, and the rotary support 3 is rotationally driven to rotate the hollow shaft 1, and the heating coil 2 hardens the hollow shaft 1 with high frequency current. In addition, the inner surface cooling solenoid valve 9a
Open the coolant pump 7 to open the spout hole 4 of the coolant spout pipe 4.
1, a cooling liquid is ejected from the upper edge side of the thin walled portion 11 of the hollow shaft 1 into the hollow interior.
すると、この薄肉部１１は内部から噴出冷却液にて冷却
されながら焼入れされるので、薄肉厚であることによる
温度上昇が防がれるので、その外周面が厚肉部１２と同
程度に焼入れされる。（こ ゛の焼入れ部分は、第１
図にて小間隔の斜線で示す。）また、冷却済の冷却液は
、回転支持体３の中空排液孔３２より外部もしくは冷却
液タンク８に排出される。Then, the thin wall portion 11 is hardened while being cooled by the cooling liquid jetted from inside, so that the temperature rise due to the thin wall thickness is prevented, and the outer circumferential surface of the thin wall portion 11 is hardened to the same extent as the thick wall portion 12. Ru. (This hardened part is
In the figure, it is indicated by diagonal lines at small intervals. ) Furthermore, the cooled coolant is discharged to the outside or to the coolant tank 8 through the hollow drain hole 32 of the rotary support 3.
このようにして、焼入れが行なわれた後、外周冷却用電
磁弁９ｂを開くと、中空シャフト１の中空内部と外周部
が、前記冷却液噴出管４からの噴出冷却液と、外周冷却
ジャケット５からの噴出冷却液により内部冷却と外部冷
却が同時に行える。After quenching has been performed in this way, when the outer periphery cooling solenoid valve 9b is opened, the hollow interior and outer periphery of the hollow shaft 1 are exposed to the cooling liquid spouted from the cooling liquid spouting pipe 4 and the outer periphery cooling jacket 5. Internal and external cooling can be performed simultaneously by the coolant jetted from the pipe.
また、単に冷却速度を早める場合には、前記ロータリー
ジヨイント６を回転して冷却液噴出管４を回転しながら
冷却を行うとよい、この場合、中空シャフト１より冷却
液噴出管４を若干離し、その摩耗を極力少なくするのが
好ましい。In addition, if you simply want to speed up the cooling speed, cooling may be performed while rotating the rotary joint 6 to rotate the coolant jet pipe 4. In this case, the coolant jet pipe 4 may be slightly separated from the hollow shaft 1. , it is preferable to minimize the wear.
本装置では、特に、冷却液噴出管４の回転をロータリー
ジヨイント６の回転により、中空シャフト１を支持する
回転支持体３の回転と同期させることによめ、回転支持
体３と冷却液噴出管４の噴出孔４１の相対的位置が固定
位置となるので、第２図に示すような例えばスプライン
ｌｌａのようなワーク形状の異なる部分を有する中空シ
ャフト１に対して、焼入れによる硬化層深さの変化をも
たらすことが可能である。In particular, this device synchronizes the rotation of the coolant jet pipe 4 with the rotation of the rotary support 3 that supports the hollow shaft 1 through the rotation of the rotary joint 6. Since the relative position of the nozzle hole 41 of No. 4 is a fixed position, the depth of the hardened layer due to quenching can be adjusted for the hollow shaft 1 having different workpiece shapes, such as a spline lla as shown in FIG. It is possible to bring about change.
光皿■泣果
本発明は、以上述べたように、その装置として、中空シ
ャフトを回転支持し、上部より下部に貫通する中空排液
孔を有する回転支持体と、前記中空シャフトの薄肉部上
縁端側の中空部内に配設された冷却液噴出管と、中空シ
ャフトの外面近傍に配設された加熱コイルとを具備した
ものであり、その方法として、同一周波数電流で前記中
空シャフトを焼入れする一方、該焼入れ時に、中空シャ
フトの薄肉部端縁側から中空内部に冷却液を噴出して中
空シャフトの薄肉部の焼入れと前記厚肉部の焼入れを同
一周波数電流にて同時に行うものであるから、同一周波
数の高周波電流で同時に焼入れすることが可能となり、
しかも回転支持体と冷却液噴出管にて上下部を支持でき
るので中空シャフトの安定支持ができ、かつ、冷却液噴
出管自体と回転支持体を冷却液にて冷却しながら中空シ
ャフトの焼入れが行なわれるので装置自体の加熱時の温
度上昇を無くすることができる。As described above, the present invention includes a rotary support that rotatably supports a hollow shaft and has a hollow drainage hole penetrating from the upper part to the lower part, and a rotary support body that rotatably supports a hollow shaft, and a rotary support body that rotatably supports a hollow shaft, and a rotary support body that rotatably supports a hollow shaft and has a hollow drain hole that penetrates from the upper part to the lower part. It is equipped with a coolant jet pipe disposed in a hollow portion on the edge side and a heating coil disposed near the outer surface of the hollow shaft, and the method includes hardening the hollow shaft with an electric current of the same frequency. On the other hand, during the quenching, the cooling liquid is spouted from the edge side of the thin-walled portion of the hollow shaft into the hollow interior, and the thin-walled portion and the thick-walled portion of the hollow shaft are simultaneously quenched using the same frequency current. , it becomes possible to harden at the same time with high-frequency current of the same frequency,
Moreover, since the upper and lower parts can be supported by the rotating support and the coolant jet pipe, the hollow shaft can be stably supported, and the hollow shaft can be hardened while cooling the coolant jet pipe itself and the rotary support with the coolant. This eliminates the temperature rise during heating of the device itself.
また、冷却時には、前記冷却液噴出管と、別に設置する
外周冷却ジャケットにより内面冷却と外周冷却とを同時
に行えるので冷却時間が短くなり焼入れ作業時間の短縮
が計れる。Furthermore, during cooling, the inner surface and the outer periphery can be cooled simultaneously by the coolant jetting pipe and the outer periphery cooling jacket installed separately, so that the cooling time is shortened and the quenching operation time can be shortened.
第１図は本発明の一実施例の焼入装置の一部断面した正
面図、第２図は中空シャフトの一部断面した平面図であ
る。
１・・・中空シャフト、１１・・・薄肉部、１２・・・
厚肉部、２・・・加熱コイル、３・・・回転支持体、３
２・・・中空廃液孔、４・・・冷却液噴出管。FIG. 1 is a partially sectional front view of a hardening apparatus according to an embodiment of the present invention, and FIG. 2 is a partially sectional plan view of a hollow shaft. 1...Hollow shaft, 11...Thin wall part, 12...
Thick wall portion, 2... Heating coil, 3... Rotating support, 3
2...Hollow waste liquid hole, 4...Cooling liquid spout pipe.
Claims (2)
厚肉部を有する中空シャフトを高周波で焼入れする中空
シャフトの高周波焼入方法において、同一周波数電流で
前記中空シャフトを焼入れする一方、該焼入れ時に、中
空シャフトの薄肉部端縁側から中空内部に冷却液を噴出
して中空シャフトの薄肉部の焼入れと前記厚肉部の焼入
れを同一周波数電流にて同時に行うことを特徴とする中
空シャフトの高周波焼入方法。(1) In an induction hardening method for a hollow shaft, in which a hollow shaft having a stepped inner circumference or outer circumference and a thin wall portion and a thick wall portion is hardened using high frequency, the hollow shaft is hardened with the same frequency current. , during the quenching, a cooling liquid is ejected from the edge side of the thin-walled portion of the hollow shaft into the hollow interior, thereby simultaneously quenching the thin-walled portion of the hollow shaft and the thick-walled portion using the same frequency current. Induction hardening method for shafts.
厚肉部を有する中空シャフトを高周波で焼入れする中空
シャフトの高周波焼入装置において、前記中空シャフト
を回転支持し、上部より下部に貫通する中空排液孔を有
する回転支持体と、前記中空シャフトの薄肉部上縁端側
の中空部内に配設された冷却液噴出管と、中空シャフト
の外面近傍に配設された加熱コイルとを具備しており、
中空シャフトの薄肉部の焼入れと前記厚肉部の焼入れを
同一周波数電流にて同時に行うように構成したことを特
徴とする中空シャフトの高周波焼入装置。(2) In a hollow shaft induction hardening device for hardening a hollow shaft having a stepped inner circumference or outer circumference and a thin wall portion and a thick wall portion using high frequency, the hollow shaft is rotatably supported, and the lower portion is lower than the upper portion. a rotating support body having a hollow drainage hole penetrating through the hollow shaft; a cooling liquid jet pipe disposed within the hollow portion on the upper edge side of the thin wall portion of the hollow shaft; and a heating coil disposed near the outer surface of the hollow shaft. It is equipped with
1. An induction hardening apparatus for a hollow shaft, characterized in that the thin wall portion of the hollow shaft is hardened and the thick wall portion of the hollow shaft is hardened at the same time using the same frequency current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61220016A JPS6376821A (en) | 1986-09-17 | 1986-09-17 | Method and apparatus for high frequency quenching of hollow shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61220016A JPS6376821A (en) | 1986-09-17 | 1986-09-17 | Method and apparatus for high frequency quenching of hollow shaft |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6376821A true JPS6376821A (en) | 1988-04-07 |
| JPH0217613B2 JPH0217613B2 (en) | 1990-04-23 |
Family
ID=16744611
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61220016A Granted JPS6376821A (en) | 1986-09-17 | 1986-09-17 | Method and apparatus for high frequency quenching of hollow shaft |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6376821A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006013730A1 (en) * | 2004-08-02 | 2006-02-09 | Ntn Corporation | Hollow power transmission shaft and method of manufacturing the same |
| JP2008179870A (en) * | 2007-01-26 | 2008-08-07 | High Frequency Heattreat Co Ltd | Hardening apparatus and hardening method |
| JP2012136740A (en) * | 2010-12-27 | 2012-07-19 | Neturen Co Ltd | Induction hardening device and induction hardening method |
| CN114015854A (en) * | 2021-11-02 | 2022-02-08 | 南京快轮智能科技有限公司 | Fire passing device for wheel core of scooter |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59226118A (en) * | 1983-06-03 | 1984-12-19 | Ntn Toyo Bearing Co Ltd | High frequency hardening method of inside circumferential surface of thin walled cylindrical article having flange part |
-
1986
- 1986-09-17 JP JP61220016A patent/JPS6376821A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59226118A (en) * | 1983-06-03 | 1984-12-19 | Ntn Toyo Bearing Co Ltd | High frequency hardening method of inside circumferential surface of thin walled cylindrical article having flange part |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006013730A1 (en) * | 2004-08-02 | 2006-02-09 | Ntn Corporation | Hollow power transmission shaft and method of manufacturing the same |
| US8101031B2 (en) | 2004-08-02 | 2012-01-24 | Ntn Corporation | Hollow power transmission shaft and method of manufacturing the same |
| JP2008179870A (en) * | 2007-01-26 | 2008-08-07 | High Frequency Heattreat Co Ltd | Hardening apparatus and hardening method |
| JP2012136740A (en) * | 2010-12-27 | 2012-07-19 | Neturen Co Ltd | Induction hardening device and induction hardening method |
| CN114015854A (en) * | 2021-11-02 | 2022-02-08 | 南京快轮智能科技有限公司 | Fire passing device for wheel core of scooter |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0217613B2 (en) | 1990-04-23 |
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