JPS61195923A - Method and device for hardening surface of shaft member having small hole opened to peripheral surface - Google Patents

Method and device for hardening surface of shaft member having small hole opened to peripheral surface

Info

Publication number
JPS61195923A
JPS61195923A JP3662385A JP3662385A JPS61195923A JP S61195923 A JPS61195923 A JP S61195923A JP 3662385 A JP3662385 A JP 3662385A JP 3662385 A JP3662385 A JP 3662385A JP S61195923 A JPS61195923 A JP S61195923A
Authority
JP
Japan
Prior art keywords
hole
shaft member
shaft
hardening
small
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.)
Pending
Application number
JP3662385A
Other languages
Japanese (ja)
Inventor
Zenkichi Takaishi
高石 善吉
Masaaki Iwashita
岩下 雅昭
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Neturen Co Ltd
Original Assignee
Neturen Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Neturen Co Ltd filed Critical Neturen Co Ltd
Priority to JP3662385A priority Critical patent/JPS61195923A/en
Publication of JPS61195923A publication Critical patent/JPS61195923A/en
Pending legal-status Critical Current

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Abstract

PURPOSE:To avert the overheating and overcooling around a small hole and to harden uniformly the surface of a shaft member by closing one end of the through-hole of the shaft member, introducing fluid therein and heating and cooling quickly the shaft member while ejecting the fluid through the opening on the peripheral surface of the shaft member. CONSTITUTION:The shaft member W is fitted between center shafts 20 and 50 and a closing member 60 is brought into press contact with the other end face of the shaft member W. A driving shaft 11 is turned to rotate the member W. A prescribed flow rate of gas is admitted into a passage 33 and is ejected from the aperture on the peripheral surface through the through-hole or blind holes Ha-Hc and small hole (h) of the shaft member W. The member W is subjected to induction heating by a heating coil so that the surface layer is heated up to the prescribed hardening temp. The cooling fluid for hardening is then injected and to cool quickly the surface layer. The injection of the fluid from the aperture on the peripheral surface of the hole (h) is continued during this time. The hardened layer having the uniform hardness distribution down to the uniform depth is formed over the entire surface on the peripheral surface of the part to be treated of the member W.

Description

【発明の詳細な説明】 (産業上の利用分野) 本発明は周面に油孔等の小孔が開口する軸部材の表面を
誘導加熱焼入れする方法および装置に関する。
DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method and apparatus for induction hardening the surface of a shaft member having small holes such as oil holes in the circumferential surface.

(従来の技術) 軸部材は機械的性質向上を計るために表面を焼入れ処理
に付すことが多く、特に局面所定部分が摺動面とされて
いる場合には耐摩耗性付与のため表面焼入れ処理は必須
といってよいほどであるが、上記摺動面に潤滑油を供給
する油孔が開口していることが多い。
(Prior art) The surface of shaft members is often subjected to hardening treatment in order to improve their mechanical properties. Particularly when a predetermined portion of the curved surface is used as a sliding surface, surface hardening treatment is performed to impart wear resistance. Although this can be said to be essential, oil holes are often opened to supply lubricating oil to the sliding surface.

従来、表面に油孔等の小孔が開口している被処理軸部材
を誘導加熱焼入れする場合、加熱時には小孔の開口周縁
に誘導加熱の特性とされるエツジ効果で磁束が集中する
ため、他の部分に比べて異常に高温度となり、急冷時に
は稜線部分が冷却され易いため、他の部分に比べて深部
まで過度に冷却され、これが起因して部材内応力に破綻
を生じて焼割れが惹起される虞があり、焼割れに至らな
いまでも過度の焼入れとなって均一な焼入れ仕上がりが
得られないので、小孔に鋼材製の栓部材を嵌着したり、
磁性材練粉を詰めたりしたうえで焼入れ処理を施すよう
にしていた。
Conventionally, when induction heating hardens a shaft member that has small holes such as oil holes on its surface, magnetic flux concentrates around the openings of the small holes due to the edge effect, which is a characteristic of induction heating, during heating. The temperature is abnormally high compared to other parts, and the ridge line part is easily cooled during rapid cooling, so the deep part is cooled excessively compared to other parts, and this causes a breakdown in the internal stress of the member, resulting in quench cracking. Even if it does not lead to quench cracking, it may cause excessive quenching and make it impossible to obtain a uniform quenched finish, so a steel plug member may be fitted into the small hole,
They were filled with magnetic material powder and then hardened.

(従来技術に存する問題点) 焼入れ処理の前工程として小孔に栓部材を嵌着したり、
磁性材練粉を詰めたりする作業と焼入れ処理の後工程と
して小孔から栓部材や磁性材練粉を抜き取る作業は全て
人手に頼らざるを得す、そのうえ栓部材は焼入れ処理後
には小孔内に焼嵌め状態となるので抜出しが容易ではな
く、そのうえ栓部材が小孔を完全に密封しないと(完全
に密封しない場合が常態である)焼入れ用冷却流体(水
溶性樹脂剤の水溶液が使用される場合が多い)が小孔内
に侵入して加熱時に孔壁に焼成付着して焼入れ工程終了
後に小さいワイヤブラシで除去しなければ発錆原因を残
すこととなり、磁性材練粉は注意しないと孔内に鋏片が
残留するなど、極めて煩雑かつ時間がかかり生産性に欠
けるので、解決策が希求されるところであった。
(Problems with conventional technology) As a pre-quenching process, plug members are fitted into small holes,
The work of filling the magnetic material powder and the work of extracting the plug member and magnetic material powder from the small hole as a post-quenching process must all be done manually, and in addition, the plug member is removed from the small hole after the hardening process. It is not easy to pull out the hole because it is shrink-fitted, and if the plug member does not completely seal the small hole (which is normal), the cooling fluid for quenching (an aqueous solution of a water-soluble resin agent) is used. Magnetic material powder must be used with care, as it will enter the small hole and adhere to the hole wall during heating, and if it is not removed with a small wire brush after the hardening process, it will cause rust. Since scissors pieces remain in the hole, it is extremely complicated and time-consuming, and lacks productivity, so a solution has been desired.

(発明の目的) 本発明は周面に小孔が開口する軸部材を表面焼入れする
場合の従来方法に存する問題点を解決するためになされ
たもので、人手を要する作業を全く不要とするとともに
、小孔周縁の過加熱・過冷却を回避して焼割れの虞を皆
無として他部分と同様な焼入れ仕上がりとなし得ること
が可能であり、しかも貫通孔もしくは盲孔および小孔孔
壁の発錆・酸化の虞を皆無とする焼入れ方法および装置
を提供することを目的とする。
(Object of the Invention) The present invention has been made to solve the problems that exist in the conventional method when surface hardening a shaft member having small holes in the circumferential surface. By avoiding overheating and overcooling of the periphery of the small hole, it is possible to obtain the same quenched finish as other parts with no risk of quench cracking, and moreover, it is possible to achieve the same hardening finish as other parts, and to prevent cracking of the through hole or blind hole and the wall of the small hole. The purpose of the present invention is to provide a quenching method and device that eliminates the risk of rust and oxidation.

(第1発明の構成) 本願第1発明の構成は、 (1)軸線に沿って一方端面から他方端面まで穿孔され
ている貫通孔もしくは一方端面から所定位置まで穿孔さ
れている盲孔より分岐した小孔が開面に開口する軸部材
の周表面を誘導加熱焼入れする場合において、 (2)上記貫通孔の他方端面を閉塞した一方端面側もし
くは上記盲孔の孔口端面側から孔内に気体流体を流入せ
しめ、 (3)当該気体流体を周面の開口から噴出させつつ加熱
コイルによる加熱および焼入れ用冷却流体による急冷を
施すようにした ことを特徴とする周面に小孔が開口する軸部材の表面焼
入れ方法にある。
(Configuration of the first invention) The configuration of the first invention of the present application is as follows: (1) A through hole drilled along the axis from one end surface to the other end surface or a blind hole drilled from one end surface to a predetermined position branches. When induction heating and hardening the circumferential surface of a shaft member in which a small hole opens into an open surface, (2) gas is introduced into the hole from one end surface of the through hole that is closed, or from the hole end surface of the blind hole; (3) A shaft having small holes in its circumferential surface, characterized in that: (3) the gaseous fluid is ejected from an opening in the circumferential surface, and is heated by a heating coil and rapidly cooled by a cooling fluid for quenching; There is a method for surface hardening of parts.

換言すれば、軸部材の軸線に沿って設けられている潤滑
油の供給路となる貫通孔もしくは盲孔を利用し、貫通孔
の場合は他方端面側の孔口を閉塞して一方端面側の孔口
から、また盲孔の場合は端面の孔口から気体流体を孔内
に流入させ、当該貫通孔もしくは盲孔から分岐して周面
に開口する小孔から気体流体を噴出させた状態で焼入れ
工程に付すものである。
In other words, a through hole or a blind hole provided along the axis of the shaft member that serves as a lubricating oil supply path is used, and in the case of a through hole, the hole opening on the other end side is closed and the hole on one end side is closed. A gaseous fluid is caused to flow into the hole from the hole opening, or from the hole opening on the end face in the case of a blind hole, and is jetted out from a small hole that branches from the through hole or blind hole and opens on the peripheral surface. It is subjected to a quenching process.

(第1発明の作用) 焼入れ工程における加熱時には、周面に開口する小孔か
ら噴出する気体流体はエツジ効果で磁束が集中し過加熱
される開口周縁の熱を奪熱して他の部分の温度と同一加
熱温度に維持し、冷却時には焼入れ用冷却流体の孔内侵
入を阻止して孔壁側からの焼入れ用冷却流体による過冷
却を防止する。
(Effect of the first invention) During heating in the quenching process, the gaseous fluid ejected from the small holes opened in the peripheral surface concentrates magnetic flux due to the edge effect, absorbs heat from the overheated periphery of the opening, and lowers the temperature of other parts. The heating temperature is maintained at the same temperature as , and during cooling, the quenching cooling fluid is prevented from entering the hole, thereby preventing overcooling by the quenching cooling fluid from the hole wall side.

(第2発明の構成) 本願第1発明の思想を具現するための装置に関する本願
第2発明の構成は、 (1)軸線に沿って一方端面から他方端面まで穿孔され
ている貫通孔もしくは一方端面から所定位置まで穿孔さ
れている盲孔より分岐した小孔が周面に開口する軸部材
の周表面を誘導加熱焼入れする装置において、 (2)所定間隔を隔てて先端を相対向させて上記軸部材
を両端面方向から保持・軸回転せしめるセンタ軸を、 (3)一方側は 40元部方向が中実部、先端面から所定長さ部分が中空
の管状部に形成してある所定外径σ軸材とし、 ロ、当該センタ軸の元部方向外周を内部に環状の周回溝
が形成されている固定のケースでセンタ軸が回動可能か
つ気密維持可能に被覆するとともに、 ハ、先端部に所定長さ部分を軸部材の一方端部が嵌入可
能な大内径部、残余部分が当該センタ軸を嵌入可能で軸
部材端面の孔口位置が含まれる直径の小内径部とした二
段内径の軸部材支承管をセンタ軸端面が上記小内径部内
に位置する如く固着配置し、 (4)他方側は イ、先端部が軸部材の他方端面のセンター孔に挿入可能
なコーン状に形成した軸材とし、ロ、上記コーン状先端
部を除く外周に軸部材の他方端面略全面に当接可能な端
面を具えた筒状の閉塞部材を固着配置し、 (5)上記一方側センタ軸の管状部内と上記ケースの周
回溝とは透孔を介して連通せしめるとともに、(6)当
該周回溝に気体供給源に接続する通路が開口する如く設
定してなる ことを特徴とする周面に小孔が開口する軸部材の表面焼
入れ装置にある。
(Configuration of the second invention) The configuration of the second invention of the present application regarding a device for embodying the idea of the first invention of the present application is as follows: (1) A through hole or one end surface that is bored along the axis from one end surface to the other end surface. In an apparatus for induction heating hardening of the circumferential surface of a shaft member in which a small hole branching from a blind hole drilled to a predetermined position is opened on the circumferential surface, (2) the shaft member is A center shaft that holds and rotates the member from both end faces, (3) one side is a solid part in the direction of the 40 yuan part, and a predetermined outer diameter that is formed into a hollow tubular part for a predetermined length from the tip face. σ-shaft material, B. The outer periphery of the center shaft in the base direction is covered with a fixed case in which an annular circumferential groove is formed inside so that the center shaft can rotate and maintain airtightness, and C. The tip part A two-stage inner diameter with a predetermined length portion as a large inner diameter portion into which one end of the shaft member can be inserted, and the remaining portion into a small inner diameter portion into which the center shaft can be inserted and whose diameter includes the hole position on the end surface of the shaft member. The shaft member support tube is fixedly arranged so that the center shaft end face is located within the small inner diameter portion, and (4) the other side is formed into a cone shape so that the tip can be inserted into the center hole on the other end face of the shaft member. (b) a cylindrical closing member having an end surface that can come into contact with substantially the entire surface of the other end surface of the shaft member is fixedly disposed on the outer periphery excluding the cone-shaped tip; (5) of the center shaft on one side; The inside of the tubular part and the circumferential groove of the case are communicated through a through hole, and (6) a small groove is formed on the circumferential surface, the circumferential groove being set such that a passage connected to the gas supply source opens in the circumferential groove. There is a surface hardening device for a shaft member in which a hole is opened.

(実施例) 本願第2発明を第1図に示す実施例に従って以下に詳述
する。
(Example) The second invention of the present application will be described in detail below according to the example shown in FIG.

図において、Wは軸部材であり、10は駆動軸部、20
は一方側センタ軸、30は上記センタ軸20の元部方向
外周を被覆するケース、40は軸部材支承管、50は他
方側センタ軸、60は閉塞部材である。
In the figure, W is a shaft member, 10 is a drive shaft part, 20
1 is a center shaft on one side, 30 is a case that covers the outer periphery of the center shaft 20 in the direction of the base, 40 is a shaft member support tube, 50 is a center shaft on the other side, and 60 is a closing member.

上記軸部材Wは一方端面から他方端面にかけて大内径1
(a、中肉IHb、小内径Hcとそれぞれ径の異なる孔
が軸線に沿って穿設され、途中で折曲してはいるか連通
する貫通孔Hを形成し、当該貫通孔Hには所定位置から
分岐して周面に開口する小孔りがある。
The shaft member W has a large inner diameter of 1 from one end surface to the other end surface.
(a) Holes with different diameters, medium-thickness IHb and small internal diameter Hc, are drilled along the axis, forming a through-hole H that is bent in the middle or communicates, and the through-hole H has a predetermined position. There is a small hole that branches out from the top and opens on the circumference.

上記駆動軸部10は通常の軸部材焼入機の場合と異なる
ところは無く、軸受12にベアリング群13を介して支
承され、図示しない回転駆動源により回転する駆動軸1
1からなり、当該駆動軸llの先端端面には所定内径の
差込み穴14が穿設され、先端部外周はねじ部15とな
っていて、端面に所定内径の透孔を具えた締め付はキャ
ップ16が螺合可能である。
The drive shaft section 10 is the same as that of a normal shaft member hardening machine, and the drive shaft 1 is supported by a bearing 12 via a bearing group 13 and rotated by a rotary drive source (not shown).
1, an insertion hole 14 with a predetermined inner diameter is bored in the tip end face of the drive shaft 11, a threaded portion 15 is formed on the outer periphery of the tip, and a tightening cap is provided with a through hole with a predetermined inner diameter on the end face. 16 can be screwed together.

上記駆動軸部lOの差込み穴14には、本発明の一方側
センタ軸20が鍔21まで挿入されてキャップ16によ
り緊定してあり、駆動軸部10の回動に伴って回動可能
である。当該一方側センタ軸20は差込みされる元部方
向が中実部22.先端面から所定長さ部分が中空の管状
部23に形成してある。
The one-side center shaft 20 of the present invention is inserted up to the collar 21 into the insertion hole 14 of the drive shaft portion IO, and is secured by a cap 16, and is rotatable as the drive shaft portion 10 rotates. be. The center shaft 20 on one side has a solid portion 22 . A hollow tubular portion 23 is formed at a predetermined length from the distal end surface.

上記ケース30は一方側センタ軸20と同軸状となる如
く前記軸受12の端面に一方端面を固定され、締め付は
キャップ16から一方側センタ軸20の前記管状部23
の所定範囲までを含むことが可能な長さの筒体からなる
。当該ケース30の上記軸受12並びに駆動軸11方向
の端面および先端方向の端面それぞれはオイルシール3
1されており、ケース30の内壁と一方側センタ軸20
の外周との間に形成される空間には、所定の間隔Sを維
持して例えばボール・ベアリング32aおよび32bが
嵌着されている。従って、センタ軸20は上記ボール・
ベアリング32aおよび32b間の間隔Sで形成される
周回溝に囲繞され、かつケース30内で気密を維持しつ
つ回動可能である。
The case 30 has one end face fixed to the end face of the bearing 12 so as to be coaxial with the center shaft 20 on one side, and is tightened from the cap 16 to the tubular portion 20 of the center shaft 20 on the one side.
It consists of a cylindrical body with a length that can include up to a predetermined range of. The end face of the case 30 in the direction of the bearing 12 and the drive shaft 11 and the end face in the tip direction are each provided with an oil seal 3.
1, and the inner wall of the case 30 and the center shaft 20 on one side
For example, ball bearings 32a and 32b are fitted into the space formed between the outer periphery and the outer periphery of the ball bearings 32a and 32b while maintaining a predetermined spacing S. Therefore, the center shaft 20 is
It is surrounded by a circumferential groove formed by the spacing S between the bearings 32a and 32b, and is rotatable within the case 30 while maintaining airtightness.

而して、一方便センタ軸20の管状部23を上記周回m
sに囲繞される部位まで達する如く諸元を設定する一方
、他方では当該管状部23の管壁に管内231と周回溝
Sとを連通する透孔24を設けるとともに、上記ケース
30に周回溝Sの所定位置へ開口する通路33を設け、
当該通路33に図示しない気体供給源・−−−−−−一
例えばエア・コンプレッサー−−−−−一−と接続する
導管を接続可能に設定する。
Thus, the circumference m of the tubular portion 23 of the one-way center shaft 20 is
On the one hand, the specifications are set so that the part surrounded by providing a passage 33 that opens to a predetermined position;
A conduit that connects to a gas supply source (not shown), such as an air compressor, is connected to the passage 33 so as to be connectable thereto.

上記軸部材支承管40は所定長さ部分が軸部材の一方端
部が嵌入可能な大内径部41.残余部分が一方便センタ
軸20を嵌入可能な小内径部42に形成した二段内径の
管状材からなり、一方便センタ軸20の先端部に、その
端面が上記大内径部41と所定の間隔部Kを維持して小
内径部42内に位置する如く、ねじ孔43を用いてボル
ト締め固定配置される。而して、小内径部42の内径は
少なくとも軸部材Wの一方端面のいずれかの位置にある
貫通孔Hの孔口が含まれる大きさに設定されなければな
らない。
The shaft member supporting tube 40 has a predetermined length portion having a large inner diameter portion 41 into which one end of the shaft member can be fitted. The remaining part is made of a tubular material with a two-stage inner diameter formed into a small inner diameter part 42 into which the one-way center shaft 20 can be inserted, and the end face is at a predetermined distance from the large inner diameter part 41 at the tip of the one-way center shaft 20. The screw hole 43 is used to securely tighten the screw hole 43 so that the portion K is maintained within the small inner diameter portion 42 . Therefore, the inner diameter of the small inner diameter portion 42 must be set to a size that includes at least the opening of the through hole H located at any position on one end surface of the shaft member W.

上記他方側センタ軸50は閉塞部材60と一体構造とな
っていて、図示しない前進・後退運動機構を備えており
、一方便センタ軸20に対して相寄る方向および相離れ
る方向へ変位可能、かつ図示しない軸受に支承されて自
由回動可能な変位軸51、当該変位軸51の先端部にね
し孔61を用いてボルト締め固定配置された段付き貫通
孔62を有する閉塞部材60、上記貫通孔62の一方便
センタ軸20に対向する端面方向に位置する最小内径部
に先端部がコーン521(円錐状)に形成されている本
体が挿入され鍔部522が小内径部にあるコーン軸52
、上記変位軸51が閉塞部材60の中肉径部段差に当接
している端面と上記コーン軸52の鍔部522との端面
間に介挿された圧縮コイルばね53とからなる。
The center shaft 50 on the other side has an integral structure with the closing member 60, and is equipped with a forward/backward movement mechanism (not shown), and is movable toward and away from the one-way center shaft 20, and A displacement shaft 51 that is supported by a bearing (not shown) and can freely rotate; a closing member 60 having a stepped through hole 62 fixedly arranged with a bolt using a threaded hole 61 at the tip of the displacement shaft 51; A cone shaft 52 in which a main body having a cone-shaped tip 521 (conical shape) is inserted into the smallest inner diameter portion of the hole 62 located in the direction of the end face facing the center shaft 20, and the flange portion 522 is in the small inner diameter portion.
, a compression coil spring 53 is inserted between the end surface of the displacement shaft 51 in contact with the step of the medium diameter portion of the closing member 60 and the end surface of the flange portion 522 of the cone shaft 52.

上記閉塞部材60の端面ば軸部材Wの他方側端面と略同
形に形成される。また、コーン軸52のコーン521は
軸部材Wの他方端面のセンタ穴に挿入可能に形成される
The end face of the closing member 60 is formed to have substantially the same shape as the other end face of the shaft member W. Further, the cone 521 of the cone shaft 52 is formed to be insertable into a center hole on the other end surface of the shaft member W.

而して、前記変位軸51の一方便センタ軸20から相離
れる方向へ変位時には、圧縮コイルばね53は伸張して
鍔部522を最小内径部の段差に当接させてコーン軸5
2の先端部を閉塞部材60の端面から充分に突出状態と
し、相寄る方向へ変位してコーン521を軸部材Wのセ
ンタ孔に挿入してコーン軸52が軸部材Wの他方端面を
押圧時には、圧縮コイルばね53はコーン軸52の後退
により圧縮されて図示の如(鍔部522を最内径部の段
差から離間状態とし、当該状態において軸部材Wの他方
端面と閉塞部材60の端面とは圧縮コイルばね53の付
勢により圧接されるが如く諸元が設定される。
When the displacement shaft 51 is displaced in a direction away from the one-way center shaft 20, the compression coil spring 53 is expanded and the flange 522 is brought into contact with the step of the minimum inner diameter part, so that the cone shaft 5
When the cone 521 is inserted into the center hole of the shaft member W by making the tip of the cone 521 sufficiently protrude from the end surface of the closing member 60 and moving toward each other, the cone shaft 52 presses the other end surface of the shaft member W. The compression coil spring 53 is compressed by the retreat of the cone shaft 52, as shown in the figure (the flange 522 is separated from the step at the innermost diameter part, and in this state, the other end surface of the shaft member W and the end surface of the closing member 60 are separated from each other). The specifications are set so that the pressure contact is made by the urging force of the compression coil spring 53.

以上の実施例構成からなる装置を用いて肩面に小孔が開
口する軸部材Wを焼入れする場合につき以下に述べる。
The case of hardening a shaft member W having a small hole in its shoulder surface using the apparatus having the configuration of the above embodiment will be described below.

他方側センタ軸50が一方便センタ軸20に対して相離
れる方向に変位状態とした両センタ軸20.50間に軸
部材Wを搬入し、搬入された軸部材Wを図示右方へ軸方
向移動させて一方端部を軸部材支承管40の大内径部4
1内に端面が段差と当接するまで嵌入する0次いで、前
進・後退機構を駆動として他方側センタ軸50の変位軸
51を相寄る方向へ変位せしめる。これにより閉塞部材
60は装着したコーン軸52.圧縮コイルばね53を随
伴して軸部材Wの他方端面に向って前進し、コーン52
1を当該軸部材Wの他方端面に設けであるセンタ穴に挿
入して軸部材Wを一方便センタ軸20方向へ押圧しつつ
一方便センタ軸20と協同して支承する。この状態にお
いて、閉塞部材60の端面は軸部材Wの他方側端面と圧
接状態にある。
A shaft member W is carried in between the two center shafts 20.50 in which the other side center shaft 50 is displaced in a direction away from the one-sided center shaft 20, and the carried shaft member W is axially moved to the right in the figure. by moving one end to the large inner diameter portion 4 of the shaft member support tube 40.
1 until the end surface comes into contact with the step.Then, the forward/backward mechanism is driven to displace the displacement shaft 51 of the other center shaft 50 in the direction toward the other center shaft 50. As a result, the closure member 60 is attached to the attached cone shaft 52. The cone 52 moves forward toward the other end surface of the shaft member W accompanied by the compression coil spring 53.
1 is inserted into the center hole provided on the other end surface of the shaft member W, and the shaft member W is supported in cooperation with the one-way center shaft 20 while being pressed in the direction of the one-way center shaft 20. In this state, the end surface of the closing member 60 is in pressure contact with the other end surface of the shaft member W.

上記の如(一方便センタ軸20と他方側センタ軸50と
で軸部材Wを支承すると、ケース30の通路33は周回
溝S、一方側方便タ軸20の透孔24、管状部23の管
内231および軸部材支承管40の小内径部42内所定
間隔部Kを介して軸部材Wの貫通孔Hの一方便大内径部
Haの孔口に連通するが、当該貫通孔Hの他方端方向に
ある小内径部Hcの孔口が閉塞部材60の端面で閉塞さ
れているので、結局貫通孔Hから分岐する小孔りを介し
て軸部材Wの外周面の開口に連通ずる通路が開設される
こととなる。
As described above (when the shaft member W is supported by the one side center shaft 20 and the other side center shaft 50, the passage 33 of the case 30 is connected to the circumferential groove S, the through hole 24 of the one side toilet shaft 20, and the inside of the tubular part 23. 231 and the predetermined interval part K in the small inner diameter part 42 of the shaft member support tube 40, it communicates with the hole opening of the large inner diameter part Ha on one side of the through hole H of the shaft member W, but in the direction of the other end of the through hole H. Since the hole opening of the small inner diameter portion Hc located at The Rukoto.

次いで図示しない回転駆動源を動作として駆動軸11を
回動させるとともに、図示しない気体供給源から導管を
介して通路33へ単位時間当たり所定流量に調整した気
体を流入する。軸部材Wは駆動軸11の回転に随伴して
回転する一方便センタ軸20と自由回転ず慝他方側セン
タ軸50に支承されつつ回転し、通路33から流入した
気体は回転中の軸部材Wの貫通孔H経由で周面の開口か
ら噴出する。
Next, the drive shaft 11 is rotated by operating a rotary drive source (not shown), and gas adjusted to a predetermined flow rate per unit time flows into the passage 33 from a gas supply source (not shown) via the conduit. The shaft member W rotates while being supported by the center shaft 20 on one side, which rotates with the rotation of the drive shaft 11, and the center shaft 50 on the other side, without rotating freely, and the gas flowing in from the passage 33 is transferred to the rotating shaft member W. It is ejected from the opening in the peripheral surface via the through hole H.

この状態で、軸部材Wは例えば枝状の加熱コイルを用い
た誘導加熱が施され、当該誘導加熱により表層を所定焼
入れ温度まで加熱された軸部材Wへは所定位置に設けで
ある冷却ジャケット、から焼入れ用冷却流体が噴射され
て、或いは所定の移動機構で両センタ軸20.50が当
該回転および気体供給状態を維持したまま焼入れ用冷却
流体を満たしてある冷却槽中に軸部材Wを移動して浸漬
することにより急冷が施され、焼入れされる。この間、
小孔りの周面の開口からは気体の噴出が続き、前述本願
第1発明について説明した作用により、開口周縁部は加
熱時の過熱と急冷時の過冷却とが防止され、軸部材Wの
被処理部周面には全面にわたり均一の深さまで均一の硬
さ分布からなる焼入れ層が形成される。
In this state, the shaft member W is subjected to induction heating using, for example, a branch-shaped heating coil, and the shaft member W whose surface layer has been heated to a predetermined quenching temperature by the induction heating is provided with a cooling jacket at a predetermined position. The shaft member W is moved into a cooling tank filled with a cooling fluid for quenching, while the center shafts 20.50 maintain the rotation and gas supply state using a predetermined moving mechanism. The material is rapidly cooled and quenched by immersion. During this time,
Gas continues to be ejected from the opening on the circumferential surface of the small hole, and due to the action described above in connection with the first invention of the present application, the opening periphery is prevented from overheating during heating and subcooling during rapid cooling, and the shaft member W is prevented from overheating during heating and overcooling during rapid cooling. A hardened layer having a uniform hardness distribution to a uniform depth is formed over the entire surface of the treated part.

上記の如くして焼入れが完了した軸部材Wは他方側セン
タ軸50の一方便センタ軸20から相離れる方向への変
位により支承状態から開放されて搬出される。
The shaft member W, which has been hardened as described above, is released from the supported state by the displacement of the other side center shaft 50 in the direction away from the one-way center shaft 20, and is carried out.

(他の実施例) 上記実施例では、一方便センタ軸20を駆動軸11側、
他方側センタ軸50を変位軸側に設定した構成を挙げて
説明したが、これを逆に設定しても何等支障はない。
(Other Embodiments) In the above embodiment, the one-way center shaft 20 is placed on the drive shaft 11 side,
Although the configuration has been described in which the other side center axis 50 is set on the displacement axis side, there is no problem even if this is set in the opposite direction.

また、ケース30内の構成は上記実施例に限定されるも
のではなく、一方便センタ軸20の管状部23管内23
1に気体を導入可能かつ当該一方便センタ軸20が気密
を維持しつつ回転可能な構成であればよく、この条件を
満足する構造は全て本発明の設計事項の範囲内に属する
Further, the configuration inside the case 30 is not limited to the above embodiment, and the tubular portion 23 of the center shaft 20
1, and the one-way center shaft 20 can be rotated while maintaining airtightness, and any structure that satisfies this condition falls within the scope of the design of the present invention.

さらに、他方側センタ軸50に固定配置する閉塞部材6
0を、第2図に示す如(ねじ穴61で変位軸51に固定
配置する本体601とコーン軸52が貫通する閉塞板6
02との2部材とし、両部材601・602間に例えば
皿ばね63等の弾性体を介挿して閉塞板602にコーン
軸52と同様に弾性をもたせる構成とし、軸部材Wが加
熱時・冷却時に示す膨張・収縮挙動にコーン軸52とと
もに追随させつつ閉塞作用を行わせるようにしてもよい
Further, a closing member 6 fixedly arranged on the other side center shaft 50
0, as shown in FIG.
02, and an elastic body such as a disc spring 63 is inserted between both members 601 and 602 to give the closing plate 602 elasticity in the same way as the cone shaft 52, so that the shaft member W is heated and cooled. The closing action may be performed while the cone shaft 52 follows the expansion/contraction behavior that sometimes occurs.

上記実施例では軸部材Wに貫通孔Hが穿設されているも
のを挙げて説明したが、軸部材Wに軸線に沿った盲孔が
穿設されている場合でも、当該軸部材Wの盲孔の孔口が
ある端面を一方便センタ軸20の先端部に固着配設する
軸部材支承管40に嵌着するようにすればよ(、この場
合には他方側センタ軸50に本発明の一部をなす閉塞部
材60乃至閉塞板602を用いず、通常の軸部材焼入れ
用コーン軸を使用してもよく、あるいは本発明構成のま
ま焼入れ工程を実行してもよい。
In the above embodiment, the shaft member W is provided with a through hole H, but even if the shaft member W is provided with a blind hole along the axis line, the shaft member W may have a blind hole. The end surface with the opening of the hole may be fitted into the shaft member support tube 40 fixedly disposed at the tip of the center shaft 20 on one side (in this case, the center shaft 50 on the other side may be fitted with the shaft member support tube 40 of the present invention). A normal cone shaft for shaft member hardening may be used without using the closing member 60 or the closing plate 602, which form part of the shaft member, or the hardening process may be performed with the structure of the present invention as it is.

また、本発明に使用する気体は通常の場合空気でよいが
、必要に応じて貫通孔もしくは盲孔および小孔が焼入れ
時に酸化するのを防止するため、不活性ガスを使用する
ようにしてもよい。
In addition, the gas used in the present invention may normally be air, but if necessary, an inert gas may be used to prevent through holes, blind holes, and small holes from oxidizing during hardening. good.

上記小孔りの開口から噴出する流体の流量は、当該開口
周縁の加熱時における過熱分の奪熱と冷却時における冷
却流体の小孔り内への侵入阻止が達成されるなら、その
大小を問うものではない。
The flow rate of the fluid ejected from the opening of the small hole can be adjusted as long as the heat removal of the superheat during heating of the periphery of the opening and the prevention of the cooling fluid from entering the small hole during cooling are achieved. It's not something to ask.

さらに、選択される気体の冷却能によって加熱時の小孔
り開口部近傍における加熱を制御−することも可能であ
る。
Furthermore, it is also possible to control the heating in the vicinity of the small hole opening during heating by the cooling capacity of the selected gas.

本発明は設計の仕様を適宜変更すれば、軸部材Wの焼入
れ方法が軸方向略全長乃至所定長にわたり対向する鞍形
加熱コイルによるワンショット焼入れ、軸部材Wの軸方
向略全長乃至所定長にわたる周面をカバーする如く多巻
回した多巻加熱コイルによるワンショット焼入れおよび
移動焼入れ。
In the present invention, if the design specifications are appropriately changed, the method for hardening the shaft member W can be one-shot hardening using saddle-shaped heating coils facing each other over substantially the entire axial length to a predetermined length, or one-shot hardening over substantially the entire axial length to a predetermined length of the shaft member W. One-shot hardening and moving hardening using a multi-turn heating coil that covers the surrounding surface.

単巻加熱コイルによる移動焼入れ、同じく単巻加熱コイ
ルを単数もしくは複数用いて小孔が開口する単数もしく
は複数個所を定置焼入れする等全ての場合に適用可能で
あること勿論である。
Of course, it is applicable to all cases, such as moving hardening using a single-turn heating coil, and stationary hardening at one or more locations where small holes are opened using one or more single-turn heating coils.

(発明の効果) 本発明方法および装置を周面に小孔が開口する軸部材の
表面焼入れに実施することにより、(1)軸部材は小孔
が開口する周縁を含む被処理周面全面にわたり均一な焼
入れ仕上がりが保証され、(2)栓部材や磁性材焼粉を
小孔へ嵌入したり詰込む前工程およびこれらを小孔から
抜き出したり排除したりその他の後工程としてぞれに要
した極めて煩雑かつ時間がかかり人手にたよる作業が全
く不要となって省力化が達成され、 (3)焼入れ用冷却流体が一切孔内に侵入する虞がなく
、水溶性樹脂剤の水溶液が孔壁に付着・・焼成して被膜
となることが回避されるので、当該水溶液を安心して使
用し得、かつ従来の被膜排除の手間もなく発錆を防止し
うろこととなり、(4)気体流体として不活性ガスが使
用可能であるので、貫通孔もしくは盲孔および小孔の加
熱時の酸化防止が確実となり、 (5)さらには往々にして貫通孔、盲孔あるいは小孔内
に残留している穿孔工程時の切子も開口外に排除可能で
あり、 (4)上記(1)〜(5)が冒す綜合効果として、当該
軸部材の焼入れ工程の自動化が達成される など、顕著な効果を発揮する。
(Effects of the Invention) By applying the method and apparatus of the present invention to the surface hardening of a shaft member having small holes in its circumferential surface, (1) the shaft member covers the entire circumferential surface to be treated including the periphery where the small holes are formed; A uniform quenching finish is guaranteed, and (2) the pre-process of inserting or packing the plug member and magnetic powder into the small hole, and the post-process of extracting or removing them from the small hole and other post-processes are required. Labor-saving has been achieved by completely eliminating the need for extremely complicated, time-consuming and manual work; (3) There is no risk that the cooling fluid for quenching will enter the hole, and the aqueous solution of the water-soluble resin agent will flow through the hole wall. Since it is avoided that the aqueous solution adheres to the surface and forms a film by firing, the aqueous solution can be used with confidence, and rusting can be prevented without the conventional trouble of removing the film. The availability of active gases ensures protection against oxidation during heating of through holes or blind holes and small holes; The facets during the process can also be removed outside the opening, and (4) the combined effects of (1) to (5) above have a remarkable effect, such as automation of the hardening process of the shaft member. .

【図面の簡単な説明】[Brief explanation of drawings]

第1図は本発明の一実施例装置全体の断面正面図、第2
図は他の実施例装置の一部断面正面図である。 H,Ha 、 Hb 、 Hc・−−−−−−−−−−
−−−−一貫通孔もしくは盲孔 h・−・−−−−一一−−−−−−−・小孔W・−一−
−−−−−−−−−−−−軸部材s −−−−−−−−
−−−−−・−周回溝20・−・−・−一−−−一方便
センタ軸22−・−・−中実部 23−・−−一−−−−管状部 231・−−−−−−−一方側センタ軸の管状部内24
−−−−−−−−−−−一方側センタ軸の透孔30−・
−−−−−−−−・ケース 33−−−−−一・−−−−・通路 4 G −−−−−−−−−−一軸部材支承管41・−
−−一−−−−−−−・大内径部42−−−−−−−−
−−−−・小内径部50−−−−−−−−−−−一他方
側センタ軸52−・−・−・−コーン状軸材 521−・−・コーン状先端部
FIG. 1 is a cross-sectional front view of the entire device according to one embodiment of the present invention, and FIG.
The figure is a partially sectional front view of another example device. H, Ha, Hb, Hc・---------
---Through hole or blind hole h・-----11--------・Small hole W・-1-
−−−−−−−−−−−−Shaft member s −−−−−−−−
-------- Circumferential groove 20 ---- One-way center shaft 22 --- Solid portion 23 ---- One --- Tubular portion 231 --- ----- Inside the tubular part of the center shaft on one side 24
−−−−−−−−−−−Through hole 30 on one side center shaft−・
-------------・Case 33-----1・----・Passage 4 G -------Uniaxial member support tube 41・-
−−1−−−−−−・Large inner diameter portion 42−−−−−−−
-----・Small inner diameter part 50---------One side center shaft 52---Cone-shaped shaft member 521---Cone-shaped tip part

Claims (1)

【特許請求の範囲】 1)軸線に沿って一方端面から他方端面まで穿孔されて
いる貫通孔もしくは一方端面から所定位置まで穿孔され
ている盲孔より分岐した小孔が周面に開口する軸部材の
周表面を誘導加熱焼入れする場合において、上記貫通孔
の他方端面を閉塞した一方端面側もしくは上記盲孔の孔
口端面側から孔内に気体流体を流入せしめ、当該気体流
体を周面の開口から噴出させつつ加熱コイルによる加熱
および焼入れ用冷却流体による急冷を施すようにしたこ
とを特徴とする周面に小孔が開口する軸部材の表面焼入
れ方法。 2)軸線に沿って一方端面から他方端面まで穿孔されて
いる貫通孔もしくは一方端面から所定位置まで穿孔され
ている盲孔より分岐した小孔が周面に開口する軸部材の
周表面を誘導加熱焼入れする装置において、所定間隔を
隔てて先端を相対向させて上記軸部材を両端面方向から
保持・軸回転せしめるセンタ軸を、一方側は元部方向が
中実部、先端面から所定長さ部分が中空の管状部に形成
してある所定外径の軸材とし、当該センタ軸の元部方向
外周を内部に環状の周回溝が形成されている固定のケー
スでセンタ軸が回動可能かつ気密維持可能に被覆すると
ともに、先端部に所定長さ部分を軸部材の一方端部が嵌
入可能な大内径部、残余部分が当該センタ軸を嵌入可能
で軸部材端面の孔口位置が含まれる直径の小内径部とし
た二段内径の軸部材支承管をセンタ軸端面が上記小内径
部内に位置する如く固着配置し、他方側は先端部が軸部
材の他方端面のセンター孔に挿入可能なコーン状に形成
した軸材とし、上記コーン状先端部を除く外周に軸部材
の他方端面略全面に当接可能な端面を具えた筒状の閉塞
部材を固着配置し、上記一方のセンタ軸の管状部内と上
記ケースの周回溝とは透孔を介して連通せしめるととも
に、当該周回溝に気体供給源に接続する通路が開口する
如く設定してなることを特徴とする周面に小孔が開口す
る軸部材の表面焼入れ装置。
[Scope of Claims] 1) A shaft member having a through hole drilled from one end face to the other end face along the axis or a small hole branched from a blind hole drilled from one end face to a predetermined position on the circumferential surface. In the case of induction hardening the peripheral surface of the through hole, a gaseous fluid is caused to flow into the hole from one end surface of the through hole whose other end surface is closed or from the hole end surface of the blind hole, and the gaseous fluid is passed through the opening of the peripheral surface. 1. A method for surface hardening a shaft member having small holes in its circumferential surface, the method comprising heating with a heating coil and rapidly cooling with a hardening cooling fluid while ejecting water from the shaft. 2) Induction heating of the circumferential surface of a shaft member in which a small hole branching from a through hole drilled along the axis from one end face to the other end face or a blind hole drilled from one end face to a predetermined position opens on the circumferential surface. In a hardening device, a center shaft that holds and rotates the shaft member from both end surfaces with the tips thereof facing each other at a predetermined interval, one side has a solid portion in the direction of the base and a predetermined length from the tip surface. A shaft member with a predetermined outer diameter is formed in a hollow tubular part, and the center shaft is rotatable in a fixed case in which an annular circumferential groove is formed inside the outer periphery of the center shaft in the direction of the base. In addition to being covered in an airtight manner, a predetermined length of the tip portion includes a large inner diameter portion into which one end of the shaft member can be inserted, and the remaining portion is a hole position on the end surface of the shaft member into which the center shaft can be inserted. A two-stage inner diameter shaft member support tube with a small inner diameter portion is fixedly arranged so that the center shaft end surface is located within the small inner diameter portion, and the tip portion of the other side can be inserted into the center hole on the other end surface of the shaft member. The shaft member is formed into a cone shape, and a cylindrical closing member having an end surface that can come into contact with substantially the entire surface of the other end surface of the shaft member is fixedly arranged on the outer periphery excluding the cone-shaped tip, and the one center shaft is The inside of the tubular part and the circumferential groove of the case are communicated through a through hole, and a small hole is opened in the circumferential surface, and the circumferential groove is set so that a passage connecting to the gas supply source opens. Surface hardening equipment for shaft members.
JP3662385A 1985-02-27 1985-02-27 Method and device for hardening surface of shaft member having small hole opened to peripheral surface Pending JPS61195923A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3662385A JPS61195923A (en) 1985-02-27 1985-02-27 Method and device for hardening surface of shaft member having small hole opened to peripheral surface

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3662385A JPS61195923A (en) 1985-02-27 1985-02-27 Method and device for hardening surface of shaft member having small hole opened to peripheral surface

Publications (1)

Publication Number Publication Date
JPS61195923A true JPS61195923A (en) 1986-08-30

Family

ID=12474939

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3662385A Pending JPS61195923A (en) 1985-02-27 1985-02-27 Method and device for hardening surface of shaft member having small hole opened to peripheral surface

Country Status (1)

Country Link
JP (1) JPS61195923A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103225014A (en) * 2013-04-27 2013-07-31 哈尔滨飞机工业集团有限责任公司 Holding device used in part surface heat treatment

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Publication number Priority date Publication date Assignee Title
JPS492248A (en) * 1972-03-16 1974-01-10

Patent Citations (1)

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Publication number Priority date Publication date Assignee Title
JPS492248A (en) * 1972-03-16 1974-01-10

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103225014A (en) * 2013-04-27 2013-07-31 哈尔滨飞机工业集团有限责任公司 Holding device used in part surface heat treatment
CN103225014B (en) * 2013-04-27 2014-11-12 哈尔滨飞机工业集团有限责任公司 Holding device used in part surface heat treatment

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