JPH04206292A - Coil body for tempering - Google Patents
Coil body for temperingInfo
- Publication number
- JPH04206292A JPH04206292A JP33403990A JP33403990A JPH04206292A JP H04206292 A JPH04206292 A JP H04206292A JP 33403990 A JP33403990 A JP 33403990A JP 33403990 A JP33403990 A JP 33403990A JP H04206292 A JPH04206292 A JP H04206292A
- Authority
- JP
- Japan
- Prior art keywords
- coil
- tempering
- workpiece
- circumferential surface
- high frequency
- 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
- 238000005496 tempering Methods 0.000 title claims abstract description 53
- 230000002093 peripheral effect Effects 0.000 claims description 13
- 230000006698 induction Effects 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 abstract description 23
- 230000004323 axial length Effects 0.000 abstract 1
- 238000003825 pressing Methods 0.000 description 7
- 238000009826 distribution Methods 0.000 description 4
- 238000005336 cracking Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- JGPMMRGNQUBGND-UHFFFAOYSA-N idebenone Chemical compound COC1=C(OC)C(=O)C(CCCCCCCCCCO)=C(C)C1=O JGPMMRGNQUBGND-UHFFFAOYSA-N 0.000 description 1
- 229960004135 idebenone Drugs 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
Landscapes
- General Induction Heating (AREA)
Abstract
Description
【発明の詳細な説明】
〈産業上の利用分野〉
本発明は、はぼ円柱状または円筒状ワークの周面の高周
波焼もどしに使用される焼もどし用コイル体に関する。DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a tempering coil body used for induction tempering of the peripheral surface of a cylindrical or cylindrical workpiece.
〈従来の技術〉
円柱状または円筒状ワークの高周波焼入れさ机た周面ば
、１５０〜２８０°Ｃの比較的低い温度で焼もどしされ
るのが通例になっている。この焼もどしに使用される加
熱装置としては、円弧状の高周波加熱コイルがある。こ
れは、環状の高周波加熱コイルの周方向一部を分断して
高周波電源に接続するようにした構成になっている。こ
の高周波加熱コイルを使用して焼もどしを行う場合は、
焼入れ時の加熱と同様に、回転するワークの外側を高周
波加熱コイルが軸心方向へ相対的に移動される。<Prior Art> The induction hardened peripheral surface of a cylindrical or cylindrical workpiece is usually tempered at a relatively low temperature of 150 to 280°C. As a heating device used for this tempering, there is an arc-shaped high frequency heating coil. This has a configuration in which a part of the annular high-frequency heating coil in the circumferential direction is separated and connected to a high-frequency power source. When performing tempering using this high frequency heating coil,
Similar to heating during hardening, a high-frequency heating coil is moved relative to the outside of the rotating workpiece in the axial direction.
〈発明が解決しようとする課題〉
円弧状の高周波加熱コイルを使用した焼もどしでは、加
熱炉を使用した焼もどしに比して作業性がよく、設備面
でも有利となるが、その反面、急速加熱による焼もどし
割れが住じ易い。<Problem to be solved by the invention> Tempering using an arc-shaped high-frequency heating coil has better workability and is advantageous in terms of equipment compared to tempering using a heating furnace, but on the other hand, Tempering cracks caused by heating are likely to occur.
また、異なった半径を持つ複数のワークの周面を焼もど
しする場合、円弧状の高周波加熱コイルを使用した焼も
どしでは、それぞれのワークの半径に対応した複数の高
周波加熱コイルを準備する必要がある。そのため、コイ
ル経費の増大および高周波加熱コイルの交換による作業
能率低下が避けられない。Additionally, when tempering the circumferential surfaces of multiple workpieces with different radii, it is necessary to prepare multiple high-frequency heating coils corresponding to the radii of each workpiece when tempering using arc-shaped high-frequency heating coils. be. Therefore, an increase in coil costs and a decrease in work efficiency due to replacement of the high-frequency heating coil are unavoidable.
本発明は上記事情に鑑みて創案さたものであり、高周波
焼入用の円弧状コイルを用いた経済的で、しかも均一に
焼もどしができる焼もどし用コイル体を提供することを
目的とする。The present invention was devised in view of the above circumstances, and an object of the present invention is to provide an economical tempering coil body using an arcuate coil for induction hardening, and which can be tempered uniformly. .
本発明の別の目的は、異なる半径を持つ複数のワークま
たは同一ワークの半径が異なる部分を焼もどしできる焼
もどし用コイル体を提供することにある。Another object of the present invention is to provide a tempering coil body capable of tempering a plurality of workpieces having different radii or portions of the same workpiece having different radii.
く課題を解決するための手段〉
本発明にかかる焼もどし用コイル体は、高周波焼入れさ
れたほぼ円柱状または円筒状ワークの周面を焼もどす焼
もどし用コイル体であって、高周波電源に接続され、焼
もどしすべき周面を周方向に包囲する円弧状のコイルと
、該コイルの周方向のカーブに沿って湾曲し、焼もどし
すべき周面をその軸心方向のほぼ全長にわたって覆うよ
うに、前記コイルの軸心方向両端面に着脱自在に接合さ
れた円弧状の導電性ブロック対とを具備している。Means for Solving the Problems> The tempering coil body according to the present invention is a tempering coil body for tempering the circumferential surface of a substantially cylindrical or cylindrical workpiece that has been induction hardened, and is connected to a high frequency power source. an arcuate coil that circumferentially surrounds the circumferential surface to be tempered; and a pair of arc-shaped conductive blocks removably joined to both end faces in the axial direction of the coil.
本発明にかかる焼もどし用コイル体では、導電性ブロッ
ク対をコイルから離れた部分でワーク周面に接近させる
ことができる。In the tempering coil body according to the present invention, the conductive block pair can be brought close to the circumferential surface of the workpiece at a portion away from the coil.
またコイルを、異なった半径を持つ複数の被焼もどし部
の周面形状に対応する複数の円弧部を直列に繋いだコイ
ルとし、その各円弧部のカーブに対応した複数の円弧状
の導電性ブロック対を、前記コイルの各円弧部に夫々装
着した構成とすることもできる。In addition, the coil is a coil in which a plurality of circular arc parts corresponding to the circumferential surface shape of a plurality of tempered parts having different radii are connected in series, and a plurality of arc-shaped conductive parts corresponding to the curve of each circular arc part are connected in series. It is also possible to have a configuration in which a block pair is attached to each arcuate portion of the coil.
く作用〉
焼もどし用コイル体内でワークを周方向に回転させなが
ら、そのコイルに高周波電流を通じる。Action〉 While rotating the workpiece in the circumferential direction within the tempering coil, a high-frequency current is passed through the coil.
コイルに供給された高周波電流は、コイルの軸心方向両
端面に着脱自在に接合された円弧状の導電性ブロック対
に分流する。導電性ブロック対は、焼もどしすべき周面
をその軸心方向のほぼ全長にわたって覆っているので、
ワークの回転のみによる所謂定置−全加熱により、焼も
どしすべき周面が高周波加熱される。従って、ワークの
加熱周面の全体が均一に加熱され焼もどしされる。The high-frequency current supplied to the coil is divided into a pair of arc-shaped conductive blocks that are detachably connected to both end faces of the coil in the axial direction. Since the conductive block pair covers the peripheral surface to be tempered over almost its entire length in the axial direction,
The peripheral surface to be tempered is high-frequency heated by so-called stationary total heating by only rotation of the workpiece. Therefore, the entire heated peripheral surface of the workpiece is uniformly heated and tempered.
導電性ブロック対はコイルに着脱自在とされているので
、コイルには高周波焼入用の高周波加熱コイルが使用さ
れる。コイルに供給された高周波電流は導電性ブロック
対に分流するので、コイルにのみ通電を行う場合に比し
て電流密度は低下するが、焼もどし温度は焼入温度より
も充分に低いので、焼もどしに必要な電流密度は確保さ
れる。Since the conductive block pair is detachable from the coil, a high-frequency heating coil for induction hardening is used as the coil. Since the high-frequency current supplied to the coil is shunted to the conductive block pair, the current density is lower than when only the coil is energized, but the tempering temperature is sufficiently lower than the quenching temperature, so The current density necessary for return is ensured.
〈実施例〉
以下、図面を参照して本発明の詳細な説明する。第１図
は本発明を実施した焼もどし用コイル体の一例を示す縦
断側面図、第２図はその正面図である。<Example> Hereinafter, the present invention will be described in detail with reference to the drawings. FIG. 1 is a longitudinal sectional side view showing an example of a tempering coil body embodying the present invention, and FIG. 2 is a front view thereof.
ここに示された焼もどし用コイル体は、円柱状のワーク
１０の周面１１を、軸心方向（ワークｌＯの周方向と直
角の方向）の一部について焼もどしするのに使用される
。このコイル体は、ワーク１０をほぼ全周にわたって包
囲する円弧状のコイル２０と、コイル２０の軸心方向両
端面に接合された一対の導電性ブロック３０．３０と、
コイル２０に導電性ブロック３０．３０を固定する複数
のクランプ４０とを備えている。The tempering coil body shown here is used to temper a portion of the circumferential surface 11 of a cylindrical workpiece 10 in the axial direction (direction perpendicular to the circumferential direction of the workpiece 10). This coil body includes an arc-shaped coil 20 that surrounds the workpiece 10 over almost the entire circumference, a pair of conductive blocks 30 and 30 joined to both end faces in the axial direction of the coil 20,
A plurality of clamps 40 are provided to secure conductive blocks 30 and 30 to the coil 20.
コイル２０は、高周波焼入用のコイルで、内部が通水路
とされた角筒状の導電性金属により構成されている。コ
イル２０の周方向両端部は、外方に延出されて高周波電
源５０に接続される。The coil 20 is a coil for induction hardening, and is made of a rectangular cylindrical conductive metal with a passageway inside. Both circumferential ends of the coil 20 extend outward and are connected to a high frequency power source 50.
導電性ブロック３０は、コイル２０のカーブに沿ってワ
ーク１０をほぼ全周にわたって包囲するほぼ円形の円弧
形状とされている。導電性ブロック３０の一方の内縁部
には、コイル２０の外縁部が嵌合される切欠き部３１が
設けられている。切欠き部３１を除いた導電性ブロック
３０の内周面３３は、コイル２０から離れる方向に向か
って軸心側へ傾斜したテーノ々面になっている。従って
、導電性プロ・ンク３０とワーク１０の周面１１との間
隔は、コイル２０から離れるほど小さくなる。導電性ブ
ロック３０．３０が直接対向する面間には、円弧状の絶
縁板３２が介在されている。The conductive block 30 has a substantially circular arc shape that surrounds the workpiece 10 almost entirely around the workpiece 10 along the curve of the coil 20 . One inner edge of the conductive block 30 is provided with a notch 31 into which the outer edge of the coil 20 is fitted. The inner circumferential surface 33 of the conductive block 30 excluding the notch 31 is a flat surface that is inclined toward the axis in the direction away from the coil 20 . Therefore, the distance between the conductive plate 30 and the circumferential surface 11 of the workpiece 10 becomes smaller as the distance from the coil 20 increases. An arc-shaped insulating plate 32 is interposed between the directly opposing surfaces of the conductive blocks 30 and 30.
クランプ４０は、一方の導電性プロ・ンク３０の端面を
押圧する第１押圧部材４１と、他方の導電性ブロック３
０の端面を押圧する第２押圧部材４２とを有する。第１
押圧部材４１の端部には、内面が角形の筒部４３が設け
られており、第２押圧部材４２の端部には、ボルト部４
４が形成されている。そして、筒部４３に第２押圧部材
４２の端部を通して、ボルト部４４にナツト４５をねじ
込むことにより、第１押圧部材 −４１と第２押圧部材
４２とが相互に引き寄せられて、コイル２０に導電性ブ
ロック３０．３０が同心状に固定される。このクランプ
４０は、例えば導電性プロ・ンク３０．３０の周方向３
〜５箇所に装着される。The clamp 40 includes a first pressing member 41 that presses the end face of the conductive block 30 on one side, and a conductive block 3 on the other side.
It has a second pressing member 42 that presses the end surface of 0. 1st
A cylindrical portion 43 having a rectangular inner surface is provided at the end of the pressing member 41, and a bolt portion 4 is provided at the end of the second pressing member 42.
4 is formed. Then, by passing the end of the second pressing member 42 through the cylindrical portion 43 and screwing the nut 45 into the bolt portion 44, the first pressing member 41 and the second pressing member 42 are attracted to each other, and the coil 20 Conductive blocks 30.30 are fixed concentrically. This clamp 40 can be used, for example, in the circumferential direction 3
It is installed in ~5 locations.
上記焼もどし用コイル体の軸心方向の長さは、焼もどし
すべき周面１１の軸心方向の長さに等しくされている。The length of the tempering coil body in the axial direction is equal to the length of the circumferential surface 11 to be tempered in the axial direction.
次に、上記焼もどし用コイル体を用いた焼もどし作業に
ついて説明する。Next, a tempering operation using the above tempering coil body will be explained.
まず、ワーク１０を図示しないワーク取付台に水平に取
付ける。次いで、焼もどし用コイル体におけるコイル２
０がワーク１０の中心に一致し、導電性ブロック３０．
３０がワーク１０の焼もどしすべき周面１１を包囲する
状態で、ワーク１０に焼もどし用コイル体を外嵌させる
。そして、ワーク１０を周方向に回転させながら、高周
波電源５０よりコイル２０に高周波電流を通じる。First, the workpiece 10 is horizontally mounted on a workpiece mounting base (not shown). Next, coil 2 in the tempering coil body
0 coincides with the center of the workpiece 10, and the conductive block 30.
The tempering coil body is fitted onto the workpiece 10 in a state where the coil body 30 surrounds the peripheral surface 11 of the workpiece 10 to be tempered. Then, a high frequency current is passed through the coil 20 from the high frequency power source 50 while rotating the workpiece 10 in the circumferential direction.
コイル２０に供給された高周波電流は、コイル２０の軸
心方向両端面に接合された導電性プロ・ンク３０．３０
に分流する。その結果、ワーク１００回転とあいまって
、ワーク１０の焼もどしすべき周面１１が高周波加熱さ
れる。このとき、焼もどし用コイル体は、ワーク１０の
軸心方向へ移動しない所謂定置−今加熱により、ワーク
１０の周面１１を高周波加熱する。The high frequency current supplied to the coil 20 is transmitted through conductive prongs 30 and 30 connected to both end faces of the coil 20 in the axial direction.
Divided into. As a result, together with the 100 rotations of the workpiece, the peripheral surface 11 of the workpiece 10 to be tempered is heated by high frequency. At this time, the tempering coil body high-frequency heats the circumferential surface 11 of the workpiece 10 by so-called stationary heating without moving in the axial direction of the workpiece 10.
また、導電性ブロック３０．３０における電流密度は、
コイル２０から離れるほど小さくなるが、ワークＩＯの
周面１１と導電性ブロック３０．３０との間隔は、コイ
ル２０から離れたとろほど小さくなっている。従って、
ワーク１０の焼もどしすべき周面１１の加熱温度分布は
、軸心方向に均一なものとなる。そのため、均一な焼も
どしができ、周面１１の隣接する部分に伸びと縮みが生
しる事態が避けられ、焼もどし割れが防止される。Also, the current density in the conductive block 30.30 is
The distance between the circumferential surface 11 of the workpiece IO and the conductive block 30, 30 becomes smaller as the distance from the coil 20 increases. Therefore,
The heating temperature distribution of the peripheral surface 11 of the workpiece 10 to be tempered becomes uniform in the axial direction. Therefore, uniform tempering is possible, a situation in which elongation and shrinkage occur in adjacent portions of the circumferential surface 11 is avoided, and tempering cracks are prevented.
第３図は本発明の別の実施例を示す正面図である。FIG. 3 is a front view showing another embodiment of the present invention.
ここに示された焼もどし用コイル体は、半径Ｒ１の円柱
状のワーク１０ａの周面１１ａと、半径Ｒ２の円柱状の
ワーク１０ｂの周面１１ｂとを焼もどしすることができ
る。The tempering coil body shown here can temper the circumferential surface 11a of a cylindrical workpiece 10a with a radius R1 and the circumferential surface 11b of a cylindrical workpiece 10b with a radius R2.
そのコイル２０は、半径Ｒ１の円柱状のワーク１０ａの
周面１１ａをほぼ半周にわたって包囲する円弧部２０ａ
と、半径Ｒ２の円柱状のワーク１０ｂの周面１１ｂをほ
ぼ半周にわたって包囲する円弧部２０ｂとを有する。円
弧部２０ａと円弧部２０ｂとは直列に連結されて所謂ダ
ルマ型とされている。円弧部２０ａの軸心方向両端面に
は、円弧部２０ａのカーブに沿って湾曲した導電性ブロ
ック３０ａが、クランプ４０を用いて結合されている。The coil 20 has a circular arc portion 20a that surrounds the peripheral surface 11a of the cylindrical workpiece 10a having a radius R1 over approximately half the circumference.
and a circular arc portion 20b that surrounds approximately half the circumferential surface 11b of the cylindrical workpiece 10b having a radius R2. The circular arc portion 20a and the circular arc portion 20b are connected in series to form a so-called daruma shape. Conductive blocks 30a curved along the curve of the arcuate portion 20a are coupled to both axial end surfaces of the arcuate portion 20a using clamps 40.
円弧部２０ｂの軸心方向両端面には、円弧部２０ｂのカ
ーブに沿って湾曲した導電性ブロック３０ｂが、クラン
プ４０を用いて結合されている。Conductive blocks 30b, which are curved along the curve of the arcuate portion 20b, are coupled to both end surfaces of the arcuate portion 20b in the axial direction using clamps 40.
上記焼もどし用コイル体を使用して半径Ｒ１の円柱状の
ワーク１０ａの周面１１ａを焼もどしする場合には、コ
イル２０の円弧部２０ａの中心がワーク１０ａの中心に
一致するように、ワーク１０ａの焼もどしすべき周面１
１ａの外側に焼もどし用コイル体をセットする。そして
、前記同様に、ワークｌｏａを周方向に回転させながら
、コイル２０に高周波電流を通じる。これにより、半径
Ｒ１の円柱状のワーク１０ａの焼もどしすべき周面１１
ａが、円弧部２０ａおよび導電性ブロック３０ａにより
高周波加熱されて焼もどしされる。半径Ｒ２の円柱状の
ワーク１０ｂの周面１１ｂを焼もどしする場合には、円
弧部２０ｂおよび導電性ブロック３０ｂを使用して、ワ
ーク１０ａと同様に周面１１ｂを高周波加熱する。When tempering the circumferential surface 11a of a cylindrical workpiece 10a with a radius R1 using the above-mentioned tempering coil body, the workpiece is Peripheral surface 1 to be tempered of 10a
A tempering coil body is set on the outside of 1a. Then, as described above, a high frequency current is passed through the coil 20 while rotating the work loa in the circumferential direction. As a result, the peripheral surface 11 to be tempered of the cylindrical workpiece 10a with radius R1
a is high-frequency heated and tempered by the circular arc portion 20a and the conductive block 30a. When tempering the circumferential surface 11b of the cylindrical workpiece 10b with radius R2, the circular arc portion 20b and the conductive block 30b are used to subject the circumferential surface 11b to high-frequency heating in the same manner as the workpiece 10a.
上記焼もどし用コイル体は、ワーク１０ａ、ワーク１０
ｂだけでなく、第５図に示すように、半径Ｒ１の大径部
と半径Ｒ２の小径部とを有するワーク１０の各部周面を
焼もどしすることもできる。また、コイル２０は、ワー
ク１０ａ、ワーク１０ｂあるいはワーク１０の半径Ｒ１
の大径部、半径Ｒ２の小径部の各高周波焼入に使用する
ことができる。The above-mentioned tempering coil body is a workpiece 10a, a workpiece 10
As shown in FIG. 5, it is also possible to temper the circumferential surface of each part of the workpiece 10, which has a large diameter part with a radius R1 and a small diameter part with a radius R2. Further, the coil 20 has a radius R1 of the work 10a, the work 10b, or the work 10.
It can be used for induction hardening of the large diameter part of , and the small diameter part of radius R2.
本発明にかかる焼もどし用コイル体においては、コイル
２０の円弧部を３以上とし、各円弧部に導電性ブロック
３０を夫々固定して、３種類以上の半径の異なる周面を
高周波加熱する構成とすることもできる。In the tempering coil body according to the present invention, the coil 20 has three or more arcuate portions, a conductive block 30 is fixed to each arcuate portion, and three or more circumferential surfaces with different radii are heated with high frequency. It is also possible to do this.
導電性ブロック３０．３０の内周面３３は、第４図に示
すように、コイル２０から離れた部分での半径をコイル
２０に近い部分での半径よりも小さくした段付形状とす
ることもできる。このような導電性ブロック３０．３０
を使用した場合にも、ワーク１ｏの周面における軸心方
向の温度分布が均一化される。The inner circumferential surface 33 of the conductive block 30.30 may have a stepped shape in which the radius at a portion away from the coil 20 is smaller than the radius at a portion close to the coil 20, as shown in FIG. can. Such a conductive block 30.30
Also when using this, the temperature distribution in the axial direction on the circumferential surface of the workpiece 1o is made uniform.
クランプ４０については、適当な構造のものを導電性ブ
ロック３０．３０の大きさに合わせて適当数使用するこ
とができる。An appropriate number of clamps 40 having an appropriate structure can be used depending on the size of the conductive blocks 30, 30.
〈発明の効果〉
以上、本発明にかかる焼もどし用コイル体による場合に
は、ワークとコイルの軸心方向における相対移動がなく
、ワーク周面の加熱温度分布が均一化される。従って、
高周波加熱を使用するにもかかわらず、急速焼もどし割
れが防止され、優れた焼もどし品質が確保される。また
、コイルとして高周波焼入用コイルが使用されるので、
加熱装置が低コストとなる。<Effects of the Invention> As described above, in the case of the tempering coil body according to the present invention, there is no relative movement in the axial direction between the workpiece and the coil, and the heating temperature distribution on the circumferential surface of the workpiece is made uniform. Therefore,
Despite using high frequency heating, rapid tempering cracking is prevented and excellent tempering quality is ensured. In addition, since an induction hardening coil is used as the coil,
The cost of the heating device is low.
導電性ブロック対をコイルから離れた部分でワーク周面
に接近させた構成とすれは、ワーク周面の軸心方向にお
ける加熱温度分布の均一性が向上し、焼もどし品質が更
に良くなる。With a configuration in which the conductive block pair is brought closer to the circumferential surface of the workpiece at a portion away from the coil, the uniformity of the heating temperature distribution in the axial direction of the circumferential surface of the workpiece is improved, and the tempering quality is further improved.
−コイルを、異なった半径を持つ複数の被焼もどし部の
周面形状に対応する複数の円弧部を直列に繋いだコイル
とし、その各円弧部のカーブに対応した複数の円弧状の
導電性ブロック対を、前記コイルの各円弧部に夫々装着
した構成とした場合には、異なった半径を持つ複数のワ
ークや、同一ワークの半径が異なった部分を一つのコイ
ルで焼もどしすることができる。従って、加熱装置に要
するコストが更に低下し、且つ、コイルの交換が不必要
になって焼もどし作業時間の短縮が図られる。- The coil is a coil in which a plurality of circular arc parts corresponding to the peripheral surface shapes of the plurality of tempered parts having different radii are connected in series, and a plurality of circular arc-shaped conductive parts corresponding to the curve of each of the circular arc parts are formed. If the block pairs are attached to each arc portion of the coil, it is possible to temper multiple workpieces with different radii or parts of the same workpiece with different radii using a single coil. . Therefore, the cost required for the heating device is further reduced, and there is no need to replace the coil, thereby shortening the tempering operation time.
第１図は本発明を実施した焼もどし用コイル体の一例を
示す縦断側面図、第２図はその正面図、第３図および第
４図は本発明の他の実施例を示す正面図および縦断側面
図、第５図はワークの形状を示す側面図である。
１０・ ・ ・ワーク
１１・・・周面
２０・・・コイル
２０ａ、２０ｂ−−・円弧部
３０・・・導電性ブロック
４０・・・クランプFIG. 1 is a longitudinal sectional side view showing an example of a coil body for tempering according to the present invention, FIG. 2 is a front view thereof, and FIGS. 3 and 4 are front views showing other embodiments of the present invention. FIG. 5 is a side view showing the shape of the workpiece. 10...Work 11...Surrounding surface 20...Coils 20a, 20b--Circular portion 30...Conductive block 40...Clamp
Claims (3)
クの周面を焼もどす焼もどし用コイル体であって、高周
波電源に接続され、焼もどしすべき周面を周方向に包囲
する円弧状のコイルと、該コイルの周方向のカーブに沿
って湾曲し、焼もどしすべき周面をその軸心方向のほぼ
全長にわたって覆うように、前記コイルの軸心方向両端
面に着脱自在に接合された円弧状の導電性ブロック対と
を具備することを特徴とする焼もどし用コイル体。(1) A tempering coil body for tempering the circumferential surface of a substantially cylindrical or cylindrical workpiece that has been induction hardened, which is connected to a high-frequency power source and has an arc shape that circumferentially surrounds the circumferential surface to be tempered. A coil, which is curved along the circumferential curve of the coil and is removably joined to both end faces of the coil in the axial direction so as to cover almost the entire length of the circumferential surface to be tempered in the axial direction. A coil body for tempering, characterized by comprising a pair of arc-shaped conductive blocks.
でワーク周面に接近されたことを特徴とする請求項１に
記載の焼もどし用コイル体。(2) The tempering coil body according to claim 1, wherein the conductive block pair is brought close to the circumferential surface of the workpiece at a portion remote from the coil.
どし部の周面形状に対応する複数の円弧部を直列に繋い
だコイルであり、その各円弧部のカーブに対応した複数
の円弧状の導電性ブロック対を、前記コイルの各円弧部
に夫々装着したことを特徴とする請求項１または２に記
載の焼もどし用コイル体。(3) The coil is a coil in which a plurality of circular arc portions corresponding to the peripheral surface shapes of a plurality of tempered portions having different radii are connected in series, and a plurality of circles corresponding to the curve of each of the circular arc portions are connected in series. 3. The tempering coil body according to claim 1, wherein a pair of arc-shaped conductive blocks is attached to each arc portion of the coil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2334039A JPH07114146B2 (en) | 1990-11-29 | 1990-11-29 | Coil body for tempering |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2334039A JPH07114146B2 (en) | 1990-11-29 | 1990-11-29 | Coil body for tempering |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04206292A true JPH04206292A (en) | 1992-07-28 |
| JPH07114146B2 JPH07114146B2 (en) | 1995-12-06 |
Family
ID=18272825
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2334039A Expired - Lifetime JPH07114146B2 (en) | 1990-11-29 | 1990-11-29 | Coil body for tempering |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07114146B2 (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS609822A (en) * | 1983-06-27 | 1985-01-18 | High Frequency Heattreat Co Ltd | Method and heating coil for non-uniform tempering of step part of stepped member and its neighboring part |
| JPS60121293U (en) * | 1984-01-24 | 1985-08-15 | トヨタ自動車株式会社 | induction hardened coil |
-
1990
- 1990-11-29 JP JP2334039A patent/JPH07114146B2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS609822A (en) * | 1983-06-27 | 1985-01-18 | High Frequency Heattreat Co Ltd | Method and heating coil for non-uniform tempering of step part of stepped member and its neighboring part |
| JPS60121293U (en) * | 1984-01-24 | 1985-08-15 | トヨタ自動車株式会社 | induction hardened coil |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07114146B2 (en) | 1995-12-06 |
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