JPH06201044A - Manufacture of wire rod for i-shape steel made oil ring - Google Patents
Manufacture of wire rod for i-shape steel made oil ringInfo
- Publication number
- JPH06201044A JPH06201044A JP34871292A JP34871292A JPH06201044A JP H06201044 A JPH06201044 A JP H06201044A JP 34871292 A JP34871292 A JP 34871292A JP 34871292 A JP34871292 A JP 34871292A JP H06201044 A JPH06201044 A JP H06201044A
- Authority
- JP
- Japan
- Prior art keywords
- oil ring
- oil
- wire rod
- steel made
- side rails
- 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
Links
Landscapes
- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、内燃機関用コイルエキ
スパンダ付Ｉ型鋼製オイルリング用線材の製造方法に関
する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a wire rod for an I-shaped steel oil ring with a coil expander for an internal combustion engine.
【０００２】[0002]
【従来の技術】この種の鋼製オイルリングとしては、従
来より例えば特開昭６１−４５１７２号、特開平４−７
８３７５号等の公報により示される図３に示す構造のＩ
型鋼製オイルリング用線材１が図４（Ａ）、（Ｂ）のよ
うに用いられている。この鋼製オイルリングは、上下の
サイドレール１１、１２と、これら両サイドレールを連
結する薄肉ウエブ１３とから構成され断面略Ｉ型であ
る。サイドレールと薄肉ウエブ１３との外側には掻き落
としたオイルを受容するための外周溝１４が形成され
る。一方、それらの内周側にはコイルエキスパンダ２０
を嵌挿するための内周溝１５が形成される。各サイドレ
ールの左右は、その働きが違うため形状が全く異なって
いる。薄肉ウエブ１３には掻き落としたオイルを外周溝
１４から内周溝１５に逃すための多数の細長いオイル孔
１６が形成される。尚、オイルリングの内周溝１５に集
まったオイルはピストンリング溝内に設けられたオイル
ドレン（図示省略）を通してピストン内部にもたらさ
れ、そこから最終的にはエンジンのオイルパンに戻され
る。2. Description of the Related Art As a steel oil ring of this type, there have been conventionally known, for example, JP-A-61-45172 and JP-A-4-7.
I of the structure shown in FIG.
The shaped steel oil ring wire 1 is used as shown in FIGS. 4 (A) and 4 (B). This steel oil ring is composed of upper and lower side rails 11 and 12, and a thin web 13 connecting these side rails, and has a substantially I-shaped cross section. An outer peripheral groove 14 for receiving the scraped oil is formed outside the side rails and the thin web 13. On the other hand, the coil expander 20 is provided on the inner peripheral side of them.
An inner circumferential groove 15 for inserting the is formed. The shape of the left and right side rails is completely different because they work differently. The thin web 13 has a large number of elongated oil holes 16 for allowing the scraped oil to escape from the outer peripheral groove 14 to the inner peripheral groove 15. The oil collected in the inner circumferential groove 15 of the oil ring is introduced into the piston through an oil drain (not shown) provided in the piston ring groove, and finally returned to the oil pan of the engine.
【０００３】これらの鋼製オイルリングの形状は、もと
もと鋳鉄素材を切削加工することを前提として設計し選
択された形状であり、非常に複雑なものである。そのＩ
型鋼製オイルリング用線材は、現在、丸棒の鋼材を圧延
加工することにより断面略Ｉ型の加工を行ない、その後
冷間でオイル孔を打抜き加工し、次に焼入れ焼戻し処理
を行ない製造している。The shapes of these steel oil rings are originally designed and selected on the premise of cutting a cast iron material, and are extremely complicated. That I
The wire rod for oil rings made of shaped steel is currently manufactured by rolling a round steel rod into a substantially I-shaped cross section, then punching cold oil holes, and then quenching and tempering. ing.
【０００４】[0004]
【発明が解決しようとする課題】丸棒より断面略Ｉ型に
加工するためには、上下面に接する上下ロールダイスと
左右の台形空間の形状に近似的に合致する形状のサイド
ロールダイスを何段も使用して圧延し形成される（図示
省略）。その後図２に示すように薄肉ウエブ１３に、パ
ンチ２２とダイス２１により冷間打抜き加工を行ないオ
イル孔１６を作る。この打抜き加工において、オイル
孔の形状が安定しない、打抜き加工に用いるダイスの
寿命が著しく短い、という大きな問題がある。このため
Ｉ型鋼製オイルリングの品質が安定せず、Ｉ型鋼製オイ
ルリングの生産性が向上しない。In order to process a round bar into a substantially I-shaped cross section, an upper and lower roll die contacting the upper and lower surfaces and a side roll die having a shape approximately matching the shape of the left and right trapezoidal spaces are used. It is also formed by rolling using steps (not shown). After that, as shown in FIG. 2, cold punching is performed on the thin web 13 with a punch 22 and a die 21 to form an oil hole 16. In this punching process, there are major problems that the shape of the oil hole is not stable and the life of the die used for the punching process is extremely short. Therefore, the quality of the I-shaped oil ring is not stable, and the productivity of the I-shaped oil ring is not improved.
【０００５】特に最近、オイルリングの耐摩耗性を向上
する目的でＩ型鋼製オイルリング用線材として１３Ｃｒ
鋼、１７Ｃｒ鋼等の高Ｃｒステンレス鋼を窒化させた材
料が使用されるようになってきた。これらの材料では、
オイル孔の打抜き加工において、パンチに対する抵抗力
が大で、ダイス孔形状が不安定になるとともにダイの寿
命が従来の炭素鋼に比して１／５〜１／１０となる。本
発明は、上記問題点を解消し、オイル孔の形状を安定し
て加工できるＩ型鋼製オイルリング用線材の製造方法を
提供することを目的とする。Particularly recently, 13Cr has been used as a wire rod for an I-shaped steel oil ring for the purpose of improving the wear resistance of the oil ring.
Materials obtained by nitriding high Cr stainless steel such as steel and 17Cr steel have been used. With these materials,
In punching the oil hole, the resistance to the punch is large, the shape of the die hole becomes unstable, and the life of the die becomes 1/5 to 1/10 of that of the conventional carbon steel. An object of the present invention is to solve the above problems and to provide a method for manufacturing a wire rod for an I-shaped steel oil ring capable of stably processing the shape of an oil hole.
【０００６】[0006]
【課題を解決するための手段】本発明者は、上記課題の
原因は、その材料が高硬度であるとともに、パンチ打抜
き加工におけるダイの被加工物支持部２３の巾が非常に
小さい（通常０．４ｍｍ程度）ことにあると確認した。
しかしながらダイの被加工物支持部２３の巾が小さいの
はＩ型鋼製オイルリングの形状によるものであり改善出
来ない。また、材質の変更も要求品質が満たされず不可
能である。このため本発明は、パンチ打抜き加工を行な
う時だけＩ型鋼製オイルリング用線材を加熱し軟化させ
て加工し易い状態とすることにより上記課題を解決した
ものである。The inventor of the present invention is responsible for the above problems because the material has a high hardness and the width of the workpiece supporting portion 23 of the die in punching is very small (usually 0). It was confirmed that it was about 0.4 mm).
However, the reason why the width of the workpiece support portion 23 of the die is small is due to the shape of the I-shaped steel oil ring and cannot be improved. In addition, it is impossible to change the material because the required quality is not satisfied. Therefore, the present invention solves the above-mentioned problems by heating and softening the wire rod for I-shaped oil ring to make it easy to work only when punching.
【０００７】すなわち本発明は、上下のサイドレールと
これら両サイドレールを連結する薄肉ウエブとが一体と
なった断面略Ｉ型の鋼製オイルリング用線材の製造方法
において、断面略Ｉ型に塑性加工後、５００℃〜７００
℃に加熱した状態で薄肉ウエブにオイル孔を打抜き加工
し、次に焼入れ焼戻し処理を行うことを特徴とする。That is, according to the present invention, in a method for manufacturing a wire rod for a steel oil ring having a substantially I-shaped section in which upper and lower side rails and a thin web connecting the both side rails are integrated, a plastic material having a substantially I-shaped section is formed. After processing, 500 ℃ ~ 700
It is characterized in that an oil hole is punched in a thin web in a state of being heated to ℃, and then quenching and tempering treatment is performed.
【０００８】[0008]
【作用】本発明は、上記構成であり、Ｉ型鋼製オイルリ
ング用線材を温間状態でオイル孔の打抜き加工するた
め、パンチ対する抵抗力が小さくなり、ダイの被加工物
支持部の巾が小さくても正確な寸法精度のオイル孔を安
定して加工出来る。またダイの寿命も大巾に延長するこ
とが出来る。According to the present invention having the above-mentioned structure, since the oil hole wire rod for I-shaped steel is punched in an oil hole in a warm state, the resistance force against the punch is reduced, and the width of the workpiece supporting portion of the die is reduced. Even if the size is small, it is possible to stably machine an oil hole with accurate dimensional accuracy. In addition, the life of the die can be greatly extended.
【０００９】加熱温度を５００℃〜７００℃としたの
は、５００℃より低いとパンチの寿命に影響するほどパ
ンチに対する抵抗力が小さくならず、７００℃より高い
とＩ型鋼製オイルリング自体の熱ひずみが発生するから
である。The reason why the heating temperature is set to 500 ° C. to 700 ° C. is that if the temperature is lower than 500 ° C., the resistance to the punch does not decrease as much as it affects the life of the punch, and if the temperature is higher than 700 ° C., the I-shaped steel oil ring itself. This is because thermal strain occurs.
【００１０】[0010]
【実施例】以下、本発明のＩ型鋼製オイルリング用線材
の製造方法を実施例により具体的に説明する。まず、図
３にその断面図を示す（但しオイル孔は未加工）Ｉ型鋼
製オイルリング用線材を丸棒（高Ｃｒステンレス鋼 Ｓ
ＵＳ４４０Ｂ）より圧延加工を十数回繰り返し行ない製
作した。図３において、その寸法はＢ＝３．０ｍｍ、Ｔ
＝２．０ｍｍ、ｔ＝０．５ｍｍ、ｂ＝０．２ｍｍ、ｘ＝
０．８ｍｍ、ｙ＝０．９５ｍｍである。このＩ型鋼製オ
イルリング用線材１を図１に示す誘導加熱装置２５によ
り発振周波数３５０ＫＨｚ、発振出力３０ｋｗ、送りス
ピード１ｍ／分の条件で６３０℃に加熱しながら、その
直後に打抜き用超硬合金ダイを備えたプレス３１により
オイル孔の打抜き加工を行った。オイル孔の寸法は、ｗ
＝０．６ｍｍ、ｌ＝３．０ｍｍ、ｐ＝８．０ｍｍであ
る。EXAMPLES The method for producing the wire rod for an I-shaped steel oil ring according to the present invention will be specifically described below with reference to examples. First, FIG. 3 shows a cross-sectional view (however, the oil hole is not processed) of a wire rod for an I-shaped steel oil ring (high Cr stainless steel S
It was manufactured by repeating the rolling process more than ten times from US440B). In FIG. 3, the dimensions are B = 3.0 mm, T
= 2.0 mm, t = 0.5 mm, b = 0.2 mm, x =
0.8 mm and y = 0.95 mm. This I-shaped steel oil ring wire 1 was heated to 630 ° C. under the conditions of an oscillation frequency of 350 KHz, an oscillation output of 30 kw and a feed speed of 1 m / min by an induction heating device 25 shown in FIG. An oil hole was punched by a press 31 equipped with an alloy die. The size of the oil hole is w
= 0.6 mm, l = 3.0 mm, p = 8.0 mm.
【００１１】オイル孔は６００℃以上に熱せられた状態
で打抜かれるため超硬合金製のダイ２１への負担が非常
に軽減される。その結果、ダイの摩耗量が少なくなり、
オイル孔の精度が向上した。表１に炭素鋼材とステンレ
ス鋼材について、従来の冷間状態でオイル孔の打抜き加
工を行った場合と本発明方法による打抜き加工の場合と
のダイの摩耗の比較を示す。Since the oil holes are punched out while being heated to 600 ° C. or higher, the load on the die 21 made of cemented carbide is greatly reduced. As a result, die wear is reduced,
The accuracy of the oil hole is improved. Table 1 shows a comparison of die wear between carbon steel and stainless steel when the oil holes were punched in the conventional cold state and when punched by the method of the present invention.
【００１２】[0012]
【表１】 [Table 1]
【００１３】[0013]
【発明の効果】本発明は、以上説明したように簡単な製
造方法でオイル孔の打抜き加工を容易に安定して行うこ
とが出来、ダイの摩耗量は、炭素鋼材においては従来の
約１／１０、ステンレス鋼材においては約１／２０とな
る。このため、オイル孔加工の作業性が著しく向上し、
オイル孔の形状精度もよくなり、オイルリングの品質の
向上とコスト低減を可能とした。As described above, according to the present invention, it is possible to easily and stably punch an oil hole by a simple manufacturing method, and the die wear amount is about 1 / n that of a conventional carbon steel material. 10 and about 1/20 in stainless steel. Therefore, the workability of oil hole processing is significantly improved,
The accuracy of the shape of the oil hole has also improved, making it possible to improve the quality of the oil ring and reduce costs.
【図１】本発明におけるオイル孔加工工程を示す概略説
明図である。FIG. 1 is a schematic explanatory view showing an oil hole processing step in the present invention.
【図２】打抜き加工を示す概略説明図である。FIG. 2 is a schematic explanatory view showing a punching process.
【図３】Ｉ型鋼製オイルリング用線材の拡大平面図およ
び拡大断面図である。FIG. 3 is an enlarged plan view and enlarged cross-sectional view of a wire rod for an I-shaped steel oil ring.
【図４】（Ａ）、（Ｂ）は、Ｉ型鋼製オイルリングの使
用状態を示す説明図である。4 (A) and 4 (B) are explanatory views showing a usage state of an I-shaped steel oil ring.
１ Ｉ型鋼製オイルリング １０ Ｉ型オイルリング １１ 上部サイドレール １２ 下部サイドレール １３ 薄肉ウエブ １４ 外周溝 １５ 内周溝 １６ オイル孔 ２０ コイルエキスパンダ ２１ ダイ ２２ パンチ ２３ 被加工物支持部 ２５ 誘導加熱装置 ３１ プレス 1 I-Shaped Oil Ring 10 I-Type Oil Ring 11 Upper Side Rail 12 Lower Side Rail 13 Thin Web 14 Outer Groove 15 Inner Circumferential Groove 16 Oil Hole 20 Coil Expander 21 Die 22 Punch 23 Workpiece Support 25 Induction Heating Device 31 Press
Claims (1)
ールを連結する薄肉ウエブとが一体となった断面略Ｉ型
の鋼製オイルリング用線材の製造方法において、断面略
Ｉ型に塑性加工後、５００℃〜７００℃に加熱した状態
で薄肉ウエブにオイル孔を打抜き加工し、次に焼入れ焼
戻し処理を行なうことを特徴とするＩ型鋼製オイルリン
グ用線材の製造方法。1. A method for manufacturing a steel oil ring wire rod having a substantially I-shaped cross section in which upper and lower side rails and a thin web connecting the both side rails are integrated, after plastic working into a substantially I-shaped section, A method for producing a wire rod for an I-shaped oil ring, comprising punching an oil hole in a thin web in a state of being heated to 500 ° C to 700 ° C, and then performing quenching and tempering.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34871292A JPH06201044A (en) | 1992-12-28 | 1992-12-28 | Manufacture of wire rod for i-shape steel made oil ring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34871292A JPH06201044A (en) | 1992-12-28 | 1992-12-28 | Manufacture of wire rod for i-shape steel made oil ring |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06201044A true JPH06201044A (en) | 1994-07-19 |
Family
ID=18398862
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP34871292A Pending JPH06201044A (en) | 1992-12-28 | 1992-12-28 | Manufacture of wire rod for i-shape steel made oil ring |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06201044A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008291991A (en) * | 2007-04-27 | 2008-12-04 | Nippon Piston Ring Co Ltd | Oil ring for internal combustion engine |
| CN114505426A (en) * | 2022-02-10 | 2022-05-17 | 仪征亚新科双环活塞环有限公司 | Manufacturing method of thin steel oil ring with circular oil hole structure and steel oil ring |
| JP7148667B1 (en) * | 2021-03-31 | 2022-10-05 | Ｔｐｒ株式会社 | oil control ring |
-
1992
- 1992-12-28 JP JP34871292A patent/JPH06201044A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008291991A (en) * | 2007-04-27 | 2008-12-04 | Nippon Piston Ring Co Ltd | Oil ring for internal combustion engine |
| JP7148667B1 (en) * | 2021-03-31 | 2022-10-05 | Ｔｐｒ株式会社 | oil control ring |
| CN114505426A (en) * | 2022-02-10 | 2022-05-17 | 仪征亚新科双环活塞环有限公司 | Manufacturing method of thin steel oil ring with circular oil hole structure and steel oil ring |
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