JPS6342839B2 - - Google Patents
Info
- Publication number
- JPS6342839B2 JPS6342839B2 JP57088350A JP8835082A JPS6342839B2 JP S6342839 B2 JPS6342839 B2 JP S6342839B2 JP 57088350 A JP57088350 A JP 57088350A JP 8835082 A JP8835082 A JP 8835082A JP S6342839 B2 JPS6342839 B2 JP S6342839B2
- Authority
- JP
- Japan
- Prior art keywords
- cylindrical body
- frequency coil
- housing member
- coil
- hardening
- 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 28
- 230000000630 rising effect Effects 0.000 claims description 23
- 238000005096 rolling process Methods 0.000 claims description 20
- 239000004020 conductor Substances 0.000 claims description 13
- 238000005192 partition Methods 0.000 claims description 13
- 238000001816 cooling Methods 0.000 description 21
- 230000006698 induction Effects 0.000 description 11
- 239000000110 cooling liquid Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000010791 quenching Methods 0.000 description 4
- 230000005288 electromagnetic effect Effects 0.000 description 3
- 239000000615 nonconductor Substances 0.000 description 3
- 230000000171 quenching effect Effects 0.000 description 3
- 239000002826 coolant Substances 0.000 description 2
- 238000012937 correction Methods 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 239000012212 insulator Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Landscapes
- General Induction Heating (AREA)
Description
【発明の詳細な説明】
本発明はトリポードハウジング部材のような不
等肉厚部を有する筒状体内面の移動焼入用高周波
コイルに関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a high-frequency coil for movable hardening of the inner surface of a cylindrical body having uneven thickness portions, such as a tripod housing member.
不等肉厚部を有する筒状体として典型例である
トリポード型自在接手のハウジング部材は、第１
図に示すように各部によつて断面肉厚形状が著し
く異なつている。 The housing member of the tripod type universal joint, which is a typical example of a cylindrical body having unequal wall thickness, has a first
As shown in the figure, the cross-sectional wall thickness shape differs significantly depending on the part.
即ち、該トリポードハウジング部材１のうち、
図示しない球面ローラが転動するローラ溝２の一
対の転動面２ａを接続する接続部３は最も肉厚が
薄く、またローラ溝２とこれに隣接するローラ溝
２との区画部４は、最も厚肉部となつている。 That is, among the tripod housing members 1,
The connection part 3 connecting the pair of rolling surfaces 2a of the roller groove 2 on which a spherical roller (not shown) rolls has the thinnest thickness, and the partition part 4 between the roller groove 2 and the adjacent roller groove 2 has the following: It is the thickest part.
かかる不等肉厚を有するトリポードハウジング
部材１の内面を高周波加熱方法により焼入れする
場合、第１図に示す如くトリポードハウジング部
材１の各内面に沿つてほぼ一定の間隔を隔てて対
応配置される高周波コイル５ａを用いることが考
えられる。しかし、高周波焼入れにおいては一般
に、凸部は加熱されやすく、凹部は加熱されにく
いという特性があるため、最厚肉部たる区画部４
には焼入硬化層を得ることができるものの、ロー
ラ溝２の一対の転動面２ａ及び接続部３には焼入
硬化層を得ることができない。すなわち、第１図
に示す高周波コイル５ａによる加熱では、電気的
入熱は最厚肉部たる区画部４に費やされ、転動面
２ａ及び接続部３までは加熱され難くなるからで
ある。なお、過大な電流を高周波コイル５ａに供
給するようにすれば、転動面２ａ及び接続部３に
も焼入硬化層を形成することができるが、その一
方で区画部４が過熱状態となり、熱的バランスが
不均一となつてトリポードハウジング部材１の内
面に大きな変形を生じる。 When the inner surface of the tripod housing member 1 having such unequal wall thickness is hardened by a high-frequency heating method, high-frequency waves are placed correspondingly at approximately constant intervals along each inner surface of the tripod housing member 1 as shown in FIG. It is conceivable to use the coil 5a. However, in induction hardening, generally the convex portions are easily heated and the concave portions are difficult to heat, so the partitioned portion 4 which is the thickest part
Although a quench-hardened layer can be obtained on the pair of rolling surfaces 2a of the roller groove 2 and the connecting portion 3, a quench-hardened layer cannot be obtained on the pair of rolling surfaces 2a of the roller groove 2 and the connecting portion 3. That is, in heating by the high-frequency coil 5a shown in FIG. 1, the electrical heat input is spent on the thickest section 4, making it difficult to heat the rolling surface 2a and the connecting section 3. Note that if an excessive current is supplied to the high-frequency coil 5a, a hardened layer can also be formed on the rolling surface 2a and the connecting portion 3, but on the other hand, the partitioned portion 4 becomes overheated, Thermal balance becomes uneven and large deformations occur on the inner surface of the tripod housing member 1.
そこで、転動面２ａに焼入硬化層を形成するた
めの高周波コイルとしては、第２図に示す如く区
画部４に対応する部分の加熱導体をこの区画部４
から遠くに離して成る高周波コイル５ｂが考えら
れる。この高周波コイル５ｂは、区画部４と加熱
導体との間隔を大きくとることによつて、電気的
入熱を転動面２ａ及び接続部３に分散させるよう
にしたものである。しかし、この高周波コイル５
ｂで誘導加熱すると、区画部４の焼入硬化層の厚
さは薄くなるものの、転動面２ａには僅かな焼き
しか入らず、最薄肉部たる接続部３は全厚にわた
つて焼入れ（ズブ焼入状態）されてしまうことと
なる。この場合、区画部４のコーナー部６が加熱
され、電気的入熱は区画部４に費やされ、逆に転
動面２ａの肉厚の薄い部分までは加熱され難くな
り、結局、転動面２ａのコーナー部６及びその付
近のみ焼入れされることになりやすい。 Therefore, as a high-frequency coil for forming a hardened layer on the rolling surface 2a, as shown in FIG.
A high-frequency coil 5b that is located far away from the center is considered. This high frequency coil 5b is designed to disperse electrical heat input to the rolling surface 2a and the connecting portion 3 by providing a large distance between the partition portion 4 and the heating conductor. However, this high frequency coil 5
When induction heating is performed in step b, the thickness of the hardened layer of the partitioned portion 4 becomes thinner, but only a slight hardening occurs on the rolling surface 2a, and the connecting portion 3, which is the thinnest part, is hardened over the entire thickness ( This results in a hardened state). In this case, the corner part 6 of the partition 4 is heated, and the electrical heat input is spent in the partition 4, and on the contrary, it becomes difficult to heat the thin part of the rolling surface 2a, and eventually the rolling Only the corner portion 6 of the surface 2a and its vicinity are likely to be hardened.
従つて、上述の高周波コイル５ｂではトリポー
ドハウジング部材１の内面を一様に加熱すること
ができないため、熱バランスの関係でその内面に
大きな収縮変形を生じる。また転動面２ａのうち
焼入れされている部分と焼入れされていない部分
の境界部７では硬さが急激に変化しているため、
この部分に応力集中による割れが発生する場合が
あり、疲労強度が不足する欠点がある。 Therefore, since the above-mentioned high-frequency coil 5b cannot uniformly heat the inner surface of the tripod housing member 1, large shrinkage deformation occurs on the inner surface due to heat balance. In addition, since the hardness changes rapidly at the boundary 7 between the hardened and unhardened parts of the rolling surface 2a,
Cracks may occur in this part due to stress concentration, and there is a drawback that fatigue strength is insufficient.
なお、接続部３の過熱によるズブ焼入状態を防
止する方法として、その外面３ａを冷却すること
が考えられるが、単に外周面３ａを冷却するのみ
では、内面の均一焼入れをすることは難しいのが
実状である。 Note that cooling the outer surface 3a of the connecting portion 3 may be considered as a method of preventing the hardening state caused by overheating, but it is difficult to uniformly harden the inner surface by simply cooling the outer circumferential surface 3a. is the actual situation.
上述の種々の欠点を解消し、熱処理変形を最小
限に抑え得て、しかも割れの発生がなく疲労強度
の強いトリポードハウジング部材１を得るために
は、ローラ溝２の一対の転動面２ａ、接続部３
（最薄肉部）及び区画部４（最厚肉部）を各部一
様に焼入れすることに加えて、接続部３をズブ焼
入状態とせずかつその焼入硬化層の厚さを転動面
２ａ焼入硬化層の厚さよりも薄くするのが理想的
である。すなわち、第８図に示す如き硬化層パタ
ーンを得るのが望ましい。 In order to eliminate the various drawbacks mentioned above, to minimize heat treatment deformation, and to obtain a tripod housing member 1 with no cracking and strong fatigue strength, the pair of rolling surfaces 2a of the roller groove 2, Connection part 3
In addition to uniformly hardening the (thinnest wall part) and partition part 4 (thickest wall part), the connection part 3 is not in a deep hardening state and the thickness of the hardened layer is adjusted to the rolling surface. Ideally, it should be thinner than the thickness of the quench hardened layer 2a. That is, it is desirable to obtain a hardened layer pattern as shown in FIG.
本発明は、このような事情に勘案して鋭意実
験、研究を重ねた結果到達したものである。 The present invention has been achieved as a result of extensive experiments and research in consideration of these circumstances.
本発明の第１は、不等肉厚部を有する筒状体内
面の移動焼入用高周波コイルにおいて、上記筒状
体内面のうち最厚肉部に対応する加熱導体に、上
記筒状体の軸心方向に沿つて延びかつ上記最肉厚
部に対して平行に延設配置される立上り部を一対
設けると共に、これらの立上り部を互いに平行状
に近接配置し、近接配置された上記一対の立上り
部に互いに逆方向の電流を流すように構成したこ
とを特徴とする、不等肉厚部を有する筒状体内面
の移動焼入用高周波コイルに係るものである。 A first aspect of the present invention is a high-frequency coil for movable hardening of the inner surface of a cylindrical body having uneven wall thickness parts, in which a heating conductor corresponding to the thickest wall part of the inner surface of the cylindrical body is connected to a heating conductor of the cylindrical body. A pair of rising portions extending along the axial direction and parallel to the thickest portion are provided, and these rising portions are arranged close to each other in parallel to each other, so that the pair of raised portions are arranged close to each other in parallel to each other. The present invention relates to a high-frequency coil for movable hardening of the inner surface of a cylindrical body having uneven wall thickness portions, characterized in that currents are applied in opposite directions to the rising portions.
また、本発明の第２は、不等肉厚部を有する筒
状体内面の移動焼入用高周波コイルにおいて、上
記筒状体内面のうち最薄肉部に対応する加熱導体
に、上記筒状体の軸心方向に沿つて延びかつ上記
最薄肉部に対して平行に延設配置される立上り部
を一対設けると共に、これらの立上り部を互いに
平行状に近接配置し、近接配置された上記一対の
立上り部に互いに逆方向の電流を流すように構成
したことを特徴とする、不等肉厚部を有する筒状
体内面の移動焼入用高周波コイルに係るものであ
る。 A second aspect of the present invention is a high-frequency coil for movable hardening of the inner surface of a cylindrical body having uneven wall thickness parts, in which a heating conductor corresponding to the thinnest part of the inner surface of the cylindrical body is attached to the heating conductor of the cylindrical body. A pair of rising portions are provided that extend along the axial direction and parallel to the thinnest wall portion, and these rising portions are arranged close to each other in a parallel manner. The present invention relates to a high-frequency coil for movable hardening of the inner surface of a cylindrical body having uneven wall thickness portions, characterized in that currents are applied in opposite directions to the rising portions.
以下本発明の好適な実施例を図面により説明す
る。なお、第１図及び第２図に示す従来例と同一
要素は同一符号にて表示する。 Preferred embodiments of the present invention will be described below with reference to the drawings. Note that the same elements as those in the conventional example shown in FIGS. 1 and 2 are indicated by the same reference numerals.
第３図乃至第７図は本発明の第１実施例を示
し、第３図は本実施例に係る高周波コイル９を用
いて構成された高周波焼入装置８により、不等肉
厚部を有する筒状体としてのトリポードハウジン
グ部材１の内面を焼入れする場合の全体の配置態
様を示す要部斜視図であり、第４図は、第３図を
下方より見た斜視図である。また、第５図及至第
７図は本実施例に係る高周波コイル９の構成を示
している。 3 to 7 show a first embodiment of the present invention, and FIG. 3 shows an induction hardening device 8 constructed using a high-frequency coil 9 according to the present embodiment, which has a portion with unequal thickness. FIG. 4 is a perspective view of essential parts showing the overall arrangement when the inner surface of the tripod housing member 1 as a cylindrical body is hardened, and FIG. 4 is a perspective view of FIG. 3 viewed from below. Further, FIGS. 5 to 7 show the configuration of the high frequency coil 9 according to this embodiment.
本実施例に係る高周波コイル９は、銅などの導
体から形成されており、第５図乃至第７図に示す
如く、パイプ状に形成され、中空内部９１を冷却
液が第６図に示す矢線方向に循環しうるようにな
つている。 The high frequency coil 9 according to this embodiment is made of a conductor such as copper, and is formed into a pipe shape as shown in FIGS. It is designed to be able to circulate in a linear direction.
また、高周波コイル９は、本実施例においては
トリポードハウジング部材１の３つのローラ溝２
内に挿入、配設されるものであり、これに対応し
て第６図に示す如く、各ローラ溝２に各々振り分
けられた、単位コイル９ａ，９ｂ，９ｃからな
る。 Further, in this embodiment, the high frequency coil 9 is connected to the three roller grooves 2 of the tripod housing member 1.
Correspondingly, as shown in FIG. 6, unit coils 9a, 9b, and 9c are arranged in each roller groove 2.
各単位コイル９ａ，９ｂ，９ｃは、対応する各
ローラ溝２の内側にあつて、該ローラ溝２のロー
ラ転動面２ａに対応する部位は、該転動面２ａに
沿つた円弧状に形成され、転動面２ａとの間隔を
一定にしている。 Each unit coil 9a, 9b, 9c is located inside each corresponding roller groove 2, and a portion of the roller groove 2 corresponding to the roller rolling surface 2a is formed in an arc shape along the rolling surface 2a. The distance from the rolling surface 2a is kept constant.
また、各ローラ溝２における一対の転動面２ａ
を接続する、最も薄肉部である接続部３に相対す
る部位では、コイル９は直線状に形成され、該接
続部３の内面３ｂと若干間隔をおいて配設、移動
しうるようになつている。これは、最薄肉部たる
接続部３があまり過熱されないように配慮された
ものである。 Also, a pair of rolling surfaces 2a in each roller groove 2
The coil 9 is formed in a straight line at the part facing the connection part 3, which is the thinnest part, and is arranged and movable at a slight distance from the inner surface 3b of the connection part 3. There is. This is to prevent the connection portion 3, which is the thinnest portion, from being overheated too much.
また、トリポードハウジング部材１の最厚肉
部、すなわち隣接する各ローラ溝２間を区画して
いる区画部４に対向配置される加熱導体部分に
は、第７図に明示する如く立上り部が形成されて
いる。 Further, as shown in FIG. 7, a rising portion is formed in the thickest part of the tripod housing member 1, that is, in the heating conductor portion that is disposed opposite to the partition 4 that partitions the adjacent roller grooves 2. has been done.
すなわち、各単位コイル９ａ，９ｂ，９ｃの両
端部は、上記区画部４の対応位置で水平方向から
鉛直方向へと折曲されて立上り部としての鉛直コ
イル１０，１１が形成されており、各単位コイル
相互の隣接する鉛直コイル１０，１１は互いに平
行状に近接配置されている。そして、これらの鉛
直コイル１０，１１は、それらの間に電気的絶縁
体１２をはさんで所定長さ分だけ延設され、第７
図に示す如くその頂部で相互に連結、連通されて
いる。 That is, both ends of each unit coil 9a, 9b, 9c are bent from the horizontal direction to the vertical direction at the corresponding position of the partition section 4 to form vertical coils 10, 11 as rising parts. Adjacent vertical coils 10 and 11 of the unit coils are arranged close to each other in parallel. These vertical coils 10 and 11 are extended for a predetermined length with an electrical insulator 12 sandwiched between them, and a seventh
As shown in the figure, they are interconnected and communicated at the top.
但し、第７図において単位コイル９ｂと９ｃ間
の鉛直コイル（立上り部）１３，１４だけは、絶
縁体１２で絶縁されたまま延設され、後述する如
くリード管として高周波電源に接続される。よつ
て高周波コイル９は、全体として鉛直コイル１３
及び１４の各端部が分離しているだけで、他の部
位は一体に連続しており、コイル９全体を通して
高周波大電流が流れ、かつ中空部９１内を冷却水
が循環しうるように構成されている。 However, in FIG. 7, only the vertical coils (rising portions) 13 and 14 between the unit coils 9b and 9c are extended while being insulated by the insulator 12, and are connected to a high frequency power source as a lead pipe as described later. Therefore, the high frequency coil 9 as a whole is a vertical coil 13.
and 14 are separated, and the other parts are continuous, so that a high frequency large current can flow through the entire coil 9 and cooling water can circulate inside the hollow part 91. has been done.
しかして、上記各最厚肉部４の位置に対峙配設
される鉛直コイル１０，１１もしくは１３，１４
の部分では、対応するコイル１０とコイル１１、
もしくはコイル１３とコイル１４間では高周波電
流は相互に逆方向に流れることになる。 Thus, the vertical coils 10, 11 or 13, 14 are disposed facing each other at the positions of the thickest wall portions 4.
In the part, the corresponding coil 10 and coil 11,
Alternatively, the high frequency currents flow in opposite directions between the coils 13 and 14.
なお、各鉛直コイル間に介在させる上記絶縁体
１２の間隙は支障のない範囲で極力狭くしておく
ものとする。 Note that the gap between the insulators 12 interposed between the vertical coils is made as narrow as possible within a range that does not cause any trouble.
本実施例ではかかる構成からなる高周波コイル
９を含んだ高周波焼入装置８は次の如く構成され
ている。 In this embodiment, the induction hardening device 8 including the high frequency coil 9 having such a configuration is constructed as follows.
高周波焼入装置８は、加熱手段１５と第１冷却
ジヤケツト１６とからなる内部ユニツト１７と、
第２冷却ジヤケツト１８を備えている。 The induction hardening device 8 includes an internal unit 17 consisting of a heating means 15 and a first cooling jacket 16;
A second cooling jacket 18 is provided.
第３図乃至第７図に示す如く、上記内部ユニツ
ト１７は、本実施例では基台１９に穿設した透孔
２０内を上方に突出して配置された柱状体２１の
先端２１ａに、上記高周波コイル９の形状に合わ
せて三方に等分して振り分けられて計三個所配設
されている。 As shown in FIGS. 3 to 7, in this embodiment, the internal unit 17 has the high-frequency power applied to the tip 21a of the columnar body 21, which is arranged to protrude upward through a through hole 20 formed in the base 19. According to the shape of the coil 9, the coils are equally divided into three directions and arranged at three locations in total.
内部ユニツト１７を構成する加熱手段１５及び
第１冷却ジヤケツト１６は、第５図に示すように
高周波焼入装置８の昇降方向（トリポードハウジ
ング部材１の軸方向）に沿つて、加熱手段１５が
該昇降方向の上方に、また第１冷却ジヤケツト１
６が下方に位置するように一体に成形されてい
る。 The heating means 15 and the first cooling jacket 16 constituting the internal unit 17 are arranged so that the heating means 15 and the first cooling jacket 16 are connected to each other along the vertical direction of the induction hardening device 8 (the axial direction of the tripod housing member 1), as shown in FIG. Above the lifting direction, there is also a first cooling jacket 1
6 is integrally formed so that it is located at the bottom.
上記加熱手段１５は、上記高周波コイル９と、
該コイル９の上記軸方向前後側面（第５図におけ
る上下側面）を覆い、トリポードハウジング部材
１の内周面と対峙する側面９２のみを開放して高
周波電流による誘導加熱効果を高める、ダストコ
ア又は珪素鋼板の如き磁性体２２とからなる。 The heating means 15 includes the high frequency coil 9 and
A dust core or silicon covering the front and rear sides of the coil 9 in the axial direction (upper and lower sides in FIG. 5) and leaving only the side surface 92 facing the inner peripheral surface of the tripod housing member 1 open to enhance the induction heating effect by high frequency current. It consists of a magnetic material 22 such as a steel plate.
上記高周波コイル９の鉛直コイル１３及び１４
は、適宜リード線（図示せず）を介して、図示し
ない高周波電源に接続されるとともに、一対の鉛
直コイル１３，１４の一方（本実施例では１４）
が給水源に連結された給水管として、また他方
（本実施例では１３）が排水手段へと連結された
排水管として機能する。 Vertical coils 13 and 14 of the high frequency coil 9
is connected to a high frequency power source (not shown) via an appropriate lead wire (not shown), and is connected to one of a pair of vertical coils 13, 14 (14 in this embodiment).
One functions as a water supply pipe connected to a water supply source, and the other (13 in this embodiment) functions as a drain pipe connected to a drainage means.
なお、第７図に示す如く、高周波コイル９の水
平部分で、一対のコイル相互が最近接した部位９
３にも、コイル９相互間に電気的絶縁体１２′を
介在させてあり、また、上記柱状体２１自体も絶
縁物質で成形されている。 As shown in FIG. 7, in the horizontal part of the high-frequency coil 9, the part 9 where a pair of coils are closest to each other
3, an electrical insulator 12' is interposed between the coils 9, and the columnar body 21 itself is also formed of an insulating material.
上記第１冷却ジヤケツト１６は、本実施例では
第５図に示す如く、加熱手段１５の下部に各々一
体に組み付けられ、内部に中空部１６１を形成し
た薄肉壁１６２には、放射状に冷却液のノズル１
６３が所定数穿設されて、ローラ溝２の内面２ｂ
全面に冷却液を噴射しうるように構成されてい
る。 In this embodiment, as shown in FIG. 5, the first cooling jackets 16 are each integrally assembled to the lower part of the heating means 15, and a thin wall 162 having a hollow portion 161 formed therein is provided with a radial flow of cooling liquid. Nozzle 1
63 are bored in a predetermined number to form the inner surface 2b of the roller groove 2.
It is constructed so that the cooling liquid can be sprayed over the entire surface.
なお、上記ノズル１６３の方向は、第５図にお
いて若干下向きに穿設、形成されている。 Note that the nozzle 163 is bored and formed slightly downward in FIG. 5.
加熱手段１５と同様に三方に等分割して振り分
けられた三個の第１冷却ジヤケツト１６は、各々
適宜管路（図示せず）により柱状体２１内に配管
された冷却液圧送管２３に連結されている。該圧
送管２３の下部は、図示しない冷却液タンクに連
結され、適宜圧送手段により冷却液を上記各冷却
ジヤケツト１６内に圧送する。 Like the heating means 15, the three first cooling jackets 16, which are equally divided and distributed in three directions, are each connected to a cooling liquid pressure feed pipe 23 piped inside the columnar body 21 through an appropriate pipe line (not shown). has been done. The lower part of the pressure feeding pipe 23 is connected to a cooling liquid tank (not shown), and the cooling liquid is forced into each of the cooling jackets 16 by an appropriate pressure feeding means.
上記第２冷却ジヤケツト１８は、本実施例では
トリポードハウジング部材１の上記薄肉部３の外
周面３ｂと焼入時に所定間隔をおいて対峙、配設
されるように配置され、中空部１８１を形成する
薄肉壁１８２のうち、上記薄肉部３に対向する面
には、所定数の所定ノズル１８３が穿設され、冷
却ジヤケツト１８と図示しない冷却液タンクとを
結ぶ圧送管２４により冷却液を供給されるように
なつている。 In this embodiment, the second cooling jacket 18 is arranged so as to face the outer peripheral surface 3b of the thin wall portion 3 of the tripod housing member 1 at a predetermined interval during hardening, and forms a hollow portion 181. A predetermined number of predetermined nozzles 183 are bored on the surface of the thin wall 182 facing the thin wall portion 3, and coolant is supplied through a pressure feed pipe 24 connecting the cooling jacket 18 and a coolant tank (not shown). It is becoming more and more like this.
なお、第３図図示の如く内部ユニツト１７と第
２冷却ジヤケツト１８とは、すべて略同一高さだ
け基台１９から突出配置されている。 As shown in FIG. 3, the internal unit 17 and the second cooling jacket 18 are all arranged to protrude from the base 19 by approximately the same height.
次に本実施例の作用につき説明する。 Next, the operation of this embodiment will be explained.
上記した高周波コイル９を有する高周波焼入装
置８によりトリポードハウジング部材１の内面を
焼入れするに際しては、まず第３図に示す如く、
高周波焼入装置８を所定位置で固定しておいて、
その直上に配置されたトリポードハウジング部材
１を適宜昇降手段により下方に所定速度で連続し
て下降させていく。 When hardening the inner surface of the tripod housing member 1 using the high-frequency hardening device 8 having the high-frequency coil 9 described above, first, as shown in FIG.
The induction hardening device 8 is fixed at a predetermined position,
The tripod housing member 1 disposed directly above it is continuously lowered downward at a predetermined speed by appropriate lifting means.
しかして、トリポードハウジング部材１下端の
開口部１ａを高周波焼入装置８の高周波コイル９
が通過して中空部内に嵌入し、第６図に示す如く
水平状のループ部をローラ溝２内に配置すると共
に、鉛直コイル１０，１１及び１３，１４から成
る立上り部をトリポードハウジング部材１の軸心
方向に沿つて区画部４の内面に対して平行に延設
配置すると同時に、上記コイル９に高周波大電流
を流す。 Thus, the opening 1a at the lower end of the tripod housing member 1 is connected to the high-frequency coil 9 of the high-frequency hardening device 8.
passes through and fits into the hollow part, placing the horizontal loop part in the roller groove 2 as shown in FIG. The coil 9 is arranged to extend parallel to the inner surface of the partition 4 along the axial direction, and at the same time, a high frequency large current is passed through the coil 9.
コイル９の上方への相対的移動につれて、該コ
イル９と対向するローラ溝内周面２ｂは、表面に
誘導電流を生じ、ジユール熱により瞬時に加熱さ
れる。 As the coil 9 moves relatively upward, the roller groove inner circumferential surface 2b facing the coil 9 generates an induced current on the surface and is instantaneously heated by Joule heat.
加熱された内周面２ｂが所定の温度に達した段
階でコイル９の下方に配設された第１冷却ジヤケ
ツト１６から上記被加熱面に向けて冷却液が噴射
され、該被加熱面を急速に冷却して、ローラ溝２
の内周面２ｂ全面に焼入層（Ｔ）を得る。 When the heated inner circumferential surface 2b reaches a predetermined temperature, a cooling liquid is injected from the first cooling jacket 16 disposed below the coil 9 toward the heated surface, and the heated surface is rapidly heated. Cool the roller groove 2.
A hardened layer (T) is obtained on the entire inner circumferential surface 2b.
この際、第６図に示す如く、トリポードハウジ
ング部材１の最厚肉部である区画部４に対応して
配設されたコイル９の位置では、上述した鉛直コ
イル１０及び１１、もしくは１３及び１４には
各々逆方向の大電流が流れるため、相互の電磁作
用を打ち消し合う。このため、鉛直コイル１０，
１１及び１３，１４の巾方向の領域、すなわち第
７図においてＬで示す領域のコイル部分は内面加
熱に殆ど寄与しないこととなり、上記最厚肉部で
ある区画部４への電気的入熱は過剰とはならな
い。 At this time, as shown in FIG. 6, the vertical coils 10 and 11 or 13 and 14 are arranged at the position of the coil 9 corresponding to the thickest part of the tripod housing member 1, which is the partition part 4. Since large currents flow in opposite directions in each of the two, their electromagnetic effects cancel each other out. For this reason, the vertical coil 10,
11, 13, and 14 in the width direction, that is, the coil portion in the area indicated by L in FIG. It is not excessive.
また、薄肉部３の部分では、コイル９はその内
周面３ｂと若干距離があり、かつ該薄肉部３の外
周面３ａには、第２冷却ジヤケツト１８から冷却
液が上記加熱に若干先行して、もしくは該加熱と
並行して噴射されているので、ローラ溝内周面２
ｂのうち上記ローラ転動面２ａほどには上記内周
面３ｂが加熱されず、第１冷却ジヤケツト１６に
よる焼入れ深さ（ｔ）も相対的に薄くなる。 Further, in the thin wall portion 3, the coil 9 is slightly distant from the inner circumferential surface 3b thereof, and the cooling liquid from the second cooling jacket 18 is applied to the outer circumferential surface 3a of the thin wall portion 3 slightly before the heating. or in parallel with the heating, the roller groove inner circumferential surface 2
The inner circumferential surface 3b is not heated as much as the roller rolling surface 2a, and the depth (t) of quenching by the first cooling jacket 16 is also relatively thin.
しかして、焼入れすべきトリポードハウジング
部材１の内周面全面に、むらなく一様に高周波焼
入層を得ることができ、従来の焼入製品に発生す
る、焼入時における転動面２ａの収縮変形が防止
できる。よつて、後工程での修正作業が不要とな
り、生産性が高まる。 Therefore, it is possible to obtain an induction hardened layer evenly and uniformly on the entire inner circumferential surface of the tripod housing member 1 to be hardened, and the rolling surface 2a during hardening, which occurs in conventional hardened products, can be formed uniformly. Shrinkage and deformation can be prevented. This eliminates the need for correction work in post-processes, increasing productivity.
また、焼入れされていない部分との境界面に応
力が集中して疲労強度が低下し、ヒビ割れ等が発
生するといつた従来の問題も、焼入層が連続して
形成されるため確実に防止できる。 In addition, the continuous formation of a hardened layer reliably prevents the conventional problems of stress concentration at the interface with unhardened parts, reducing fatigue strength and causing cracks. can.
第５図に示すようにトリポードハウジング部材
１が下降して、該部材１の底面１ｂ近くまで焼入
層（Ｔ）が形成されると、コイル９への高周波電
流の導通を断ち、しかる後にトリポードハウジン
グ部材１を上昇させればよい。 As shown in FIG. 5, when the tripod housing member 1 is lowered and a hardened layer (T) is formed close to the bottom surface 1b of the member 1, conduction of high frequency current to the coil 9 is cut off, and then the tripod All that is required is to raise the housing member 1.
なお、一の被焼入体１の焼入れが完了すれば、
次の被焼入体１が移動してきて、焼入装置７の直
上に配置されて下降を開始するようにすれば、被
焼入体１の連続焼入作業が可能となる。 In addition, once the hardening of the first object to be hardened 1 is completed,
If the next object 1 to be quenched moves and is placed directly above the quenching device 7 and starts descending, continuous quenching of the objects 1 to be quenched becomes possible.
次に、第８図及び第９図は本発明の第２実施例
を示し、本実施例においては高周波コイル９は、
第１実施例と同様に、トリポードハウジング部材
１の最厚肉部たる区画部４に対峙する部位に立上
り部すなわち鉛直コイル１０，１１及び１３，１
４が形成されている他、最薄肉部たる接続部３に
対峙する部位にも立上り部が形成されている。 Next, FIGS. 8 and 9 show a second embodiment of the present invention, and in this embodiment, the high frequency coil 9 is
Similarly to the first embodiment, the rising portions, that is, the vertical coils 10, 11 and 13, 1 of the tripod housing member 1 at the portion facing the partition portion 4, which is the thickest wall portion.
4 is formed, and a rising portion is also formed at a portion facing the connecting portion 3, which is the thinnest portion.
即ち、上記接続部３に対峙する部位において
も、電気的絶縁体１２を介して一対の鉛直コイル
１０，１１が、所定高さだけ延設された後に相互
に連結、連通されており、その他の構成について
は第１実施例と同様である。 That is, even in a portion facing the connection portion 3, a pair of vertical coils 10 and 11 are extended to a predetermined height and then connected and communicated with each other via an electrical insulator 12. The configuration is the same as the first embodiment.
しかして、本実施例においては上記第１実施例
と同様の作用効果を奏する他、上記接続部３に対
峙する部位においても一対の鉛直コイル１０，１
１間に逆方向の電流が流れるから、第９図におい
てL′で示す領域は加熱作用を及ぼすことがなく、
従つて接続部３の加熱を防止できる。このため、
接続部３の外周面３ａに対応して配設される第２
冷却ジヤケツト１８を省略しても、接続部３のズ
ブ焼入れを防止でき、その内面３ｂに区画部４よ
りも薄い焼入れ硬化層パターン（第８図に示すパ
ターン）を得ることができる。また、接続部３の
外周面３ａに対応して配設される第２冷却ジヤケ
ツト１８による冷却液の噴射は、第１実施例の場
合より少量でよくなる。 Therefore, in this embodiment, in addition to achieving the same effects as in the first embodiment, a pair of vertical coils 10 and 1 are also provided at a portion facing the connection portion 3.
Since the current flows in the opposite direction between 1 and 1, the region indicated by L' in Fig. 9 does not have a heating effect.
Therefore, heating of the connecting portion 3 can be prevented. For this reason,
The second
Even if the cooling jacket 18 is omitted, the connection part 3 can be prevented from being hardened, and a hardened layer pattern (the pattern shown in FIG. 8) which is thinner than the partition part 4 can be obtained on the inner surface 3b. Furthermore, the amount of cooling liquid sprayed by the second cooling jacket 18 disposed corresponding to the outer circumferential surface 3a of the connecting portion 3 can be reduced compared to the first embodiment.
なお、かかる効果は接続部３の肉厚が薄いほど
顕著に奏されるものである。 Note that this effect is more pronounced as the thickness of the connecting portion 3 becomes thinner.
上記各実施例では被焼入体としてトリポードハ
ウジング部材を例示したが、本発明に係る高周波
コイルは、他の任意な、不等肉厚断面を有する筒
状体の内面焼入れに適用しうるものである。 In each of the above embodiments, a tripod housing member is exemplified as the object to be hardened, but the high-frequency coil according to the present invention can be applied to the internal hardening of any other cylindrical body having an uneven wall thickness cross section. be.
また、上記実施例の被焼入体の如く有底筒状体
に限らず、無底の筒状体にも適用しうる。 Further, the present invention is not limited to a cylindrical body with a bottom like the body to be hardened in the above embodiment, but can also be applied to a cylindrical body without a bottom.
さらに、高周波コイル９の形状等についても、
本発明の要旨を変更しない範囲内で種々変化させ
うる。 Furthermore, regarding the shape etc. of the high frequency coil 9,
Various changes may be made without departing from the gist of the present invention.
上述した如く本発明は、不等肉厚部を有する筒
状体内面のうち、最厚肉部に対応する加熱導体に
一対の立上り部を形成してこれらを互いに近接配
置し、上記立上り部に互いに逆方向の電流を流す
ようにしたものであるから、上記立上り部相互の
電磁作用が相殺され、従つて、加熱されやすい上
記最厚肉部の加熱を効果的に防止でき、筒状体の
内周前面にわたつてむらなく一様に焼入硬化層を
得ることができる。 As described above, the present invention forms a pair of rising portions on the heating conductor corresponding to the thickest wall portion of the inner surface of a cylindrical body having uneven wall thickness portions, and arranges these portions close to each other. Since the currents flow in opposite directions, the electromagnetic effects of the rising portions cancel each other out, and therefore, heating of the thickest portion, which is easily heated, can be effectively prevented, and the cylindrical body A quenched hardened layer can be obtained evenly and uniformly over the front surface of the inner periphery.
よつて、焼入時における内周面の収縮変形が未
然に防止可能であり、該収縮変形の修正作業も必
要としない。また、非焼入部分との境界面が存在
しないから、疲労強度が向上し、クラツク等の発
生を確実に排除し得る。 Therefore, shrinkage deformation of the inner circumferential surface during hardening can be prevented, and there is no need for correction work for the shrinkage deformation. Furthermore, since there is no interface with the non-hardened portion, fatigue strength is improved and the occurrence of cracks, etc. can be reliably eliminated.
また、本発明は、不等肉厚部を有する筒状体内
面のうち、最薄肉部に対応する加熱導体に一対の
立上り部を形成してこれらを互いに近接配置し、
上記立上り部に互いに逆方向の電流を流すように
したものであるから、上記立上り部相互の電磁作
用が相殺されることとなり、従つて、特別な冷却
手段を用いなくても、ズブ焼入れされやすい最薄
肉部に最厚肉部よりも薄い焼入硬化層を得ること
が可能となる。このため、筒状体内面の全体にわ
たつて理想的な焼入硬化層パターンを形成でき
て、収縮変形を防止でき、しかも非焼入部分と焼
入部分との境界部が存在しないので、ヒビ割れの
発生を防止でき、疲労強度を大幅に改善できる。 Further, the present invention provides a method for forming a pair of rising portions on the heating conductor corresponding to the thinnest portion of the inner surface of the cylindrical body having uneven wall thickness portions, and arranging these portions close to each other.
Since currents are passed through the rising portions in opposite directions, the electromagnetic effects of the rising portions cancel each other out, making it easy to harden without using any special cooling means. It becomes possible to obtain a quenched hardened layer in the thinnest part that is thinner than in the thickest part. Therefore, it is possible to form an ideal hardened layer pattern over the entire inner surface of the cylindrical body, preventing shrinkage and deformation, and there is no boundary between the non-hardened and hardened parts, so there is no cracking. It can prevent the occurrence of cracks and significantly improve fatigue strength.
第１図及び第２図は従来の高周波コイルをトリ
ポードハウジング部材の内面に配置した状態をそ
れぞれ示す概略断面図である。第３図乃至第７図
は本発明の第一実施例を示し、第３図はトリポー
ドハウジング部材と、本発明に係る高周波コイル
を有する高周波焼入装置の焼入前の配置態様を示
す要部斜視図、第４図は第３図を下方より見た要
部斜視図、第５図は焼入時の高周波コイルの配置
態様を示す要部縦断面図、第６図は第５図のＢ―
Ｂ線断面図、第７図は高周波コイルの構成を示す
要部斜視図、第８図及び第９図は、本発明の第二
実施例を示し、第８図は第６図に準じた断面図、
第９図は高周波コイルの構成を示す要部斜視図で
ある。
１……トリポードハウジング部材、２……ロー
ラ溝、３……接続部、４……区画部、８……高周
波焼入装置、９……高周波コイル、１０，１１，
１３，１４……立上り部としての鉛直コイル、１
６……第１冷却ジヤケツト、１８……第２冷却ジ
ヤケツト。
FIGS. 1 and 2 are schematic cross-sectional views respectively showing a state in which a conventional high-frequency coil is arranged on the inner surface of a tripod housing member. 3 to 7 show a first embodiment of the present invention, and FIG. 3 shows essential parts of a tripod housing member and an arrangement mode of an induction hardening apparatus having a high-frequency coil according to the present invention before hardening. FIG. 4 is a perspective view of the main part of FIG. 3 seen from below, FIG. 5 is a vertical cross-sectional view of the main part showing the arrangement of the high-frequency coil during hardening, and FIG. 6 is B of FIG. ―
A sectional view taken along the line B, FIG. 7 is a perspective view of essential parts showing the configuration of a high-frequency coil, FIGS. 8 and 9 show a second embodiment of the present invention, and FIG. 8 is a cross-sectional view based on FIG. 6. figure,
FIG. 9 is a perspective view of essential parts showing the configuration of the high-frequency coil. DESCRIPTION OF SYMBOLS 1... Tripod housing member, 2... Roller groove, 3... Connection part, 4... Division part, 8... Induction hardening device, 9... High frequency coil, 10, 11,
13, 14... Vertical coil as a rising part, 1
6...first cooling jacket, 18...second cooling jacket.
Claims (1)
高周波コイルにおいて、上記筒状体内面のうち最
厚肉部に対応する加熱導体に、上記筒状体の軸心
方向に沿つて延びかつ上記最厚肉部に対して平行
に延設配置される立上り部を一対設けると共に、
これらの立上り部を互いに平行状に近接配置し、
近接配置された上記一対の立上り部に互いに逆方
向の電流を流すように構成したことを特徴とす
る、不等肉厚部を有する筒状体内面の移動焼入用
高周波コイル。 ２ 上記筒状体は、トリポードハウジング部材で
あることを特徴とする特許請求の範囲第１項に記
載の高周波コイル。 ３ 上記最厚肉部は、上記トリポードハウジング
部材の隣接する各ローラ溝の区画部であることを
特徴とする特許請求の範囲第２項に記載の高周波
コイル。 ４ 不等肉厚部を有する筒状体内面の移動焼入用
高周波コイルにおいて、上記筒状体内面のうち最
薄肉部に対応する加熱導体に、上記筒状体の軸心
方向に沿つて延びかつ上記最薄肉部に対して平行
に延設配置される立上り部を一対設けると共に、
これらの立上り部を互いに平行状に近接配置し、
近接配置された上記一対の立上り部に互いに逆方
向の電流を流すように構成したことを特徴とす
る、不等肉厚部を有する筒状体内面の移動焼入用
高周波コイル。 ５ 上記筒状体は、トリポードハウジング部材で
あることを特徴とする特許請求の範囲第４項に記
載の高周波コイル。 ６ 上記最薄肉部は、上記トリポードハウジング
部材の各ローラ溝の転動面間の接続部であること
を特徴とする特許請求の範囲第５項に記載の高周
波コイル。[Scope of Claims] 1. In a high-frequency coil for movable hardening of the inner surface of a cylindrical body having unequal wall thickness parts, a heating conductor corresponding to the thickest part of the inner surface of the cylindrical body is provided with a heating conductor of the cylindrical body. A pair of rising portions are provided that extend along the axial direction and are arranged parallel to the thickest wall portion, and
These rising parts are arranged close to each other in parallel,
A high-frequency coil for movable hardening of an inner surface of a cylindrical body having unequal wall thickness parts, characterized in that current is applied in opposite directions to the pair of rising parts arranged close to each other. 2. The high-frequency coil according to claim 1, wherein the cylindrical body is a tripod housing member. 3. The high-frequency coil according to claim 2, wherein the thickest portion is a partition of each adjacent roller groove of the tripod housing member. 4. In a high-frequency coil for movable hardening of the inner surface of a cylindrical body having uneven wall thickness parts, a heating conductor corresponding to the thinnest part of the inner surface of the cylindrical body is provided with a heating conductor extending along the axial direction of the cylindrical body. and providing a pair of rising portions extending parallel to the thinnest portion,
These rising parts are arranged close to each other in parallel,
A high-frequency coil for movable hardening of an inner surface of a cylindrical body having unequal wall thickness parts, characterized in that current is applied in opposite directions to the pair of rising parts arranged close to each other. 5. The high frequency coil according to claim 4, wherein the cylindrical body is a tripod housing member. 6. The high-frequency coil according to claim 5, wherein the thinnest portion is a connection portion between rolling surfaces of each roller groove of the tripod housing member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8835082A JPS58206092A (en) | 1982-05-25 | 1982-05-25 | High frequency coil for movably quenching inner surface of cylinder with irregular thick portion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8835082A JPS58206092A (en) | 1982-05-25 | 1982-05-25 | High frequency coil for movably quenching inner surface of cylinder with irregular thick portion |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58206092A JPS58206092A (en) | 1983-12-01 |
| JPS6342839B2 true JPS6342839B2 (en) | 1988-08-25 |
Family
ID=13940371
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8835082A Granted JPS58206092A (en) | 1982-05-25 | 1982-05-25 | High frequency coil for movably quenching inner surface of cylinder with irregular thick portion |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58206092A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5021367B2 (en) * | 2007-05-28 | 2012-09-05 | 高周波熱錬株式会社 | Induction heating coil and induction heating device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5640155U (en) * | 1979-09-03 | 1981-04-14 |
-
1982
- 1982-05-25 JP JP8835082A patent/JPS58206092A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5640155U (en) * | 1979-09-03 | 1981-04-14 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58206092A (en) | 1983-12-01 |
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