JPS6332847B2 - - Google Patents
Info
- Publication number
- JPS6332847B2 JPS6332847B2 JP14137779A JP14137779A JPS6332847B2 JP S6332847 B2 JPS6332847 B2 JP S6332847B2 JP 14137779 A JP14137779 A JP 14137779A JP 14137779 A JP14137779 A JP 14137779A JP S6332847 B2 JPS6332847 B2 JP S6332847B2
- Authority
- JP
- Japan
- Prior art keywords
- diameter portion
- small diameter
- induction heating
- stepped shaft
- large diameter
- 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.)
- Expired
Links
- 238000010438 heat treatment Methods 0.000 claims description 38
- 230000006698 induction Effects 0.000 claims description 18
- 238000000034 method Methods 0.000 claims description 7
- 239000004020 conductor Substances 0.000 claims description 2
- 230000004907 flux Effects 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
Classifications
-
- 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
- C21D9/28—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for plain shafts
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Articles (AREA)
Description
【発明の詳細な説明】
本発明は大径部と小径部とを有する軸体のそれ
ぞれの部分を所望の温度かつ所望の深度に均一
に、ワンシヨツトで表面加熱する高周波誘導加熱
方法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a high frequency induction heating method for uniformly surface heating each portion of a shaft body having a large diameter portion and a small diameter portion to a desired temperature and desired depth in one shot.
従来から、ワンシヨツトで部材の表面を高周波
誘導加熱する方法は加熱時間が短くてすむという
利点があるので賞用されている。しかし、大径部
と小径部とを有する軸体の場合には、第１図にお
いて点で示すように、軸体２の大径部２ａおよび
小径部２ｂに亘つてほぼ同一深度の加熱パターン
を得ようとしても、第１図ｂに示すように大径部
２ａに適当加熱を得ようとすれば、小径部２ｂは
全断面にわたつて加熱されたり、あるいは過熱状
態となり、また小径部２ｂについて適正加熱を得
ようとすれば大径部２ａは加熱不足となることは
避けられず、所期の目的は達せられない。これを
避けるため従来から種々の方法が提案されてい
る。 Hitherto, the method of high-frequency induction heating of the surface of a member in one shot has been widely used because it has the advantage of requiring a short heating time. However, in the case of a shaft body having a large diameter part and a small diameter part, as shown by dots in FIG. However, as shown in FIG. 1b, if an attempt is made to properly heat the large diameter portion 2a, the small diameter portion 2b will be heated over its entire cross section or become overheated, and the small diameter portion 2b will be heated. If proper heating is to be achieved, the large diameter portion 2a will inevitably be underheated, and the intended purpose will not be achieved. Various methods have been proposed to avoid this problem.
その１つのワンシヨツト方式例として第２図に
示すごとく、大径部２ａはEaを電源とする誘導
加熱コイル１ａにより、小径部２ｂはEbを電源
とする誘導加熱コイル１ｂにより、すなわち、そ
れぞれ対応する加熱部に対して適合する異なる電
力を用いて加熱を行う方法があるが、２電源２コ
イル方式であるので装置が複雑で高価となること
が避けられない。 As an example of one shot method, as shown in Fig. 2, the large diameter portion 2a is heated by an induction heating coil 1a whose power source is Ea, and the small diameter portion 2b is heated by an induction heating coil 1b whose power source is Eb. There is a method of heating using different electric power that is suitable for the heating part, but since it is a two-power, two-coil system, the device is inevitably complicated and expensive.
本発明はこのような実情にかんがみ加熱時間が
短かくてすむという特徴を生かした、しかも簡易
な機構からなる段付軸体のワンシヨツト均一表面
加熱方法を提供しようとするものである。 In view of these circumstances, the present invention aims to provide a one-shot uniform surface heating method for a stepped shaft body, which takes advantage of the short heating time and has a simple mechanism.
本発明を第３図に示す実施例に従つて説明す
る。 The present invention will be explained according to the embodiment shown in FIG.
被加熱材である段付軸体２は、当該段付軸体２
の大径部２ａの外周と所定間隙へだてるような内
径を有し、かつ小径部２ｂを含む段付軸体２の全
長を充分に収容する長さを有する加熱コイル１内
に定置される。ついで段付軸体２の小径部２ｂを
収容するように誘導加熱コイル１の内周と小径部
２ｂの外周との間の間隙に沿つて小径部２ｂの先
端方向より良導電性材料のシールド部材３が挿入
される。シールド部材３は、その内径は小径部２
ｂの外径より大であり、又その外径は誘導加熱コ
イル１の内径より小で、その長さは小径部２ｂの
長さよりやゝ長く、その先端部は段部附近の大径
部２ａも被覆しうるようにしてある。又３ａは段
付軸体２とシールド部材３との短絡を防止するよ
うにシールド部材３に取付けた絶縁体である。シ
ールド部材３の端部には、例えばシリンダー４の
ロツド５の先端が固定されており、シリンダー４
の駆動によるロツド５の前進、後退によつて矢印
Ｒ←→ｃ方向への移動が可能で、それによつて誘導
加熱コイル１内へ挿入または抜き出しが可能であ
る。 The stepped shaft body 2 which is a material to be heated is
The heating coil 1 has an inner diameter that extends to a predetermined gap from the outer periphery of the large diameter portion 2a, and a length that sufficiently accommodates the entire length of the stepped shaft body 2 including the small diameter portion 2b. . Next, a shield member made of a highly conductive material is inserted along the gap between the inner periphery of the induction heating coil 1 and the outer periphery of the small diameter portion 2b from the tip direction of the small diameter portion 2b so as to accommodate the small diameter portion 2b of the stepped shaft body 2. 3 is inserted. The shield member 3 has an inner diameter of a small diameter portion 2.
b, and its outer diameter is smaller than the inner diameter of the induction heating coil 1, and its length is slightly longer than the length of the small diameter part 2b, and its tip is connected to the large diameter part 2a near the stepped part. It can also be covered. Further, 3a is an insulator attached to the shield member 3 so as to prevent a short circuit between the stepped shaft body 2 and the shield member 3. For example, the tip of the rod 5 of the cylinder 4 is fixed to the end of the shield member 3.
By moving the rod 5 forward and backward by driving the rod 5, it can move in the direction of the arrow R←→c, thereby allowing it to be inserted into or extracted from the induction heating coil 1.
このような構成において、誘導加熱コイル１の
通電を開始すると、大径部２ａの加熱は進行する
が、小径部２ｂはシールド部材３に被覆された状
態であるので加熱はほとんど進行しない。電通開
始より所定時間としてのＴ−ｔ秒経過後にシリン
ダー４を作動してロツド５を矢印ｃ方向へ変位さ
せる。当該ロツド５の変位に伴つてシールド部材
３は誘導加熱コイル１内より抜き出され、それに
よつて段付軸体２の小径部２ｂは誘導加熱コイル
１の磁束を受け、当該小径部２ｂが加熱されるこ
ととなる。通電開始よりＴ秒を経過した後、誘導
加熱コイル１への通電を停止し、加熱は完了す
る。こゝに誘導加熱コイル１による段付軸体２の
大径部２ａの適正加熱時間をＴ秒、小径部２ｂの
適正加熱時間をｔ秒とする。このようにすれば、
段付軸体２の大径部２ａには適正加熱時間である
Ｔ秒間の加熱が行われるとともに小径部２ｂにも
適正加熱時間であるｔ秒間の加熱が同一時間内の
間に行われ、従つて大径部２ａ、小径部２ｂとも
に均一な温度に、かつ均一な深さに加熱される。 In such a configuration, when energization of the induction heating coil 1 is started, heating of the large diameter portion 2a progresses, but since the small diameter portion 2b is covered with the shield member 3, heating hardly progresses. After a predetermined time of Tt seconds has elapsed since the start of the current, the cylinder 4 is actuated to displace the rod 5 in the direction of arrow c. As the rod 5 is displaced, the shield member 3 is pulled out from within the induction heating coil 1, whereby the small diameter portion 2b of the stepped shaft 2 receives the magnetic flux of the induction heating coil 1, and the small diameter portion 2b is heated. It will be done. After T seconds have elapsed since the start of energization, the energization to the induction heating coil 1 is stopped, and heating is completed. Here, the appropriate heating time for the large diameter portion 2a of the stepped shaft body 2 by the induction heating coil 1 is assumed to be T seconds, and the appropriate heating time for the small diameter portion 2b is assumed to be t seconds. If you do this,
The large diameter portion 2a of the stepped shaft 2 is heated for T seconds, which is the appropriate heating time, and the small diameter portion 2b is also heated for t seconds, which is the appropriate heating time. As a result, both the large diameter portion 2a and the small diameter portion 2b are heated to a uniform temperature and depth.
また、本実施例においては、シールド部材３の
先端部が段部附近の大径部２ａを被覆するように
したために、段部附近の大径部については弱く誘
導加熱を行えるので大径部２ａからの熱伝導によ
る段部附近の小径部２ｂの過熱を防止でき、段部
についても均一に表面加熱できる。さらに本実施
例で説明した段付軸体は、例えば大径が歯車とな
つている歯車付軸であつてもよい。 Further, in this embodiment, since the tip of the shield member 3 covers the large diameter portion 2a near the step, weak induction heating can be performed on the large diameter portion near the step. It is possible to prevent overheating of the small diameter portion 2b near the stepped portion due to heat conduction from the step portion, and the surface of the stepped portion can also be uniformly heated. Furthermore, the stepped shaft described in this embodiment may be a geared shaft whose large diameter is a gear, for example.
本発明によれば、きわめて簡単な機構を用いて
段付軸における大径部と小径部とを同時に適正加
熱することによつて従来困難とされていた段付軸
体の定置ワンシヨツトによる均一表面加熱を容易
に実現することが可能となる。 According to the present invention, by using an extremely simple mechanism to appropriately heat the large diameter portion and the small diameter portion of the stepped shaft at the same time, it is possible to uniformly heat the surface of the stepped shaft by fixed one shot, which was previously considered difficult. can be easily realized.
第１図ａは段付軸体の理想的な加熱パターンを
示す縦断面図、第１図ｂは段付軸体の加熱例を示
す縦断面図、第２図は従来の段付軸体の加熱例を
示す一部断面正面図、第３図は本発明の実施例を
示す一部断面正面図である。
１……加熱コイル、２……段付軸体、２ａ……
大径部、２ｂ……小径部、３……シールド部材。
Fig. 1a is a vertical cross-sectional view showing an ideal heating pattern for a stepped shaft, Fig. 1b is a longitudinal cross-sectional view showing an example of heating a stepped shaft, and Fig. 2 is a longitudinal cross-sectional view showing an example of heating a stepped shaft. FIG. 3 is a partially sectional front view showing an example of heating, and FIG. 3 is a partially sectional front view showing an embodiment of the present invention. 1...Heating coil, 2...Stepped shaft, 2a...
Large diameter part, 2b... Small diameter part, 3... Shield member.
Claims (1)
波誘導加熱コイル内に挿入して誘導加熱するに際
し、前記小径部と前記高周波誘導加熱コイルとの
間に導電性材料よりなるシールド部材を挿入し所
定時間大径部を誘導加熱した後、前記シールド部
材を抜き出して段付軸体全体を誘導加熱すること
を特徴とする段付軸体のワンシヨツト均一表面加
熱方法。1. When inserting a stepped shaft having a large diameter portion and a small diameter portion into a high frequency induction heating coil and performing induction heating, a shield member made of a conductive material is inserted between the small diameter portion and the high frequency induction heating coil. 1. A one-shot uniform surface heating method for a stepped shaft body, characterized in that after induction heating the large diameter portion for a predetermined period of time, the shield member is extracted and the entire stepped shaft body is induction heated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14137779A JPS5665928A (en) | 1979-11-02 | 1979-11-02 | One shot uniform heating method for surface of stepped shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14137779A JPS5665928A (en) | 1979-11-02 | 1979-11-02 | One shot uniform heating method for surface of stepped shaft |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5665928A JPS5665928A (en) | 1981-06-04 |
| JPS6332847B2 true JPS6332847B2 (en) | 1988-07-01 |
Family
ID=15290574
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14137779A Granted JPS5665928A (en) | 1979-11-02 | 1979-11-02 | One shot uniform heating method for surface of stepped shaft |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5665928A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0742510B2 (en) * | 1985-11-26 | 1995-05-10 | トヨタ自動車株式会社 | Induction hardening method for bevel gears |
| JPH03191019A (en) * | 1989-12-19 | 1991-08-21 | Fuji Denshi Kogyo Kk | High-frequency hardening device |
| JP5277545B2 (en) * | 2007-01-23 | 2013-08-28 | 株式会社ジェイテクト | Induction heat treatment method and induction heat treatment apparatus |
| JP4965310B2 (en) * | 2007-03-28 | 2012-07-04 | 高周波熱錬株式会社 | Constraint quenching apparatus and method for thin plate member |
-
1979
- 1979-11-02 JP JP14137779A patent/JPS5665928A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5665928A (en) | 1981-06-04 |
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