JPS61152330A - Preparation of piston ring - Google Patents
Preparation of piston ringInfo
- Publication number
- JPS61152330A JPS61152330A JP27079084A JP27079084A JPS61152330A JP S61152330 A JPS61152330 A JP S61152330A JP 27079084 A JP27079084 A JP 27079084A JP 27079084 A JP27079084 A JP 27079084A JP S61152330 A JPS61152330 A JP S61152330A
- Authority
- JP
- Japan
- Prior art keywords
- outer peripheral
- peripheral surface
- outer circumferential
- chamfer
- circumferential surface
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
- B23P15/06—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass piston rings from one piece
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
Description
【発明の詳細な説明】
(産業上の利用分野)
本発明は内燃a開用のピストンリング、特にテーパフェ
イス形ピストンリング(以下、テーパリングと略称する
)の製造方法に関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method of manufacturing a piston ring for internal combustion a, particularly a taper face type piston ring (hereinafter abbreviated as a taper ring).
(従来の技術)
近年の高速内燃機閏に於いてはシリンダとの摺動面に微
小な傾斜をもたせたテーパリングがその性能上の理由か
ら要求されるようになった。(Prior Art) In recent years, high-speed internal combustion engine flywheels have come to be required to have a tapered ring with a slight inclination on the sliding surface with the cylinder for reasons of performance.
すなわち外周面にテーパをつけてシリンダとの旧動向の
当り面積を少な、クシだことによって屓圧が高まり、運
転初期におけるなじみ性を向上させ、短時間でオイル消
費、プローバイを安定させることができるようになった
。さらにテーパリングはピストンの上昇行程においてす
べり面に適正な油膜を形成しやすく、下降行程では余分
なオイルをかき下げる効果がある。In other words, the outer circumferential surface is tapered to reduce the contact area with the cylinder compared to the old trend, and the comb shape increases the bottom pressure, improving conformability at the beginning of operation, and making it possible to stabilize oil consumption and probe in a short time. It became so. Furthermore, the tapered ring facilitates the formation of an appropriate oil film on the sliding surface during the piston's upward stroke, and has the effect of sweeping away excess oil during the downward stroke.
またテーパリングはそのテーパの起点、すなわち外周面
の下端のコーナー部を鋭角のままで残すとコーナー欠け
が発生するか、あるいはシリンダ内壁に条痕を付けるの
で好ましくなく、特に硬質クロムメッキを施したものに
おいては一層深い条痕を付けるので、コーナー部に通常
0.2mm程度の面取りを施すことが行なわれている。In addition, if the taper starting point, i.e., the bottom corner of the outer peripheral surface, is left at an acute angle, the taper ring will cause corner chipping or scratches on the inner wall of the cylinder, which is undesirable. In order to create deeper scratches on products, the corners are usually chamfered to a depth of about 0.2 mm.
この下端コーナー部の面取り寸法はブローパイをさらに
減少させるためには微小であることが必要であるが、特
にコーナー部を挾む外周面と下面において0.1111
!下の微小な面取りを形成するための製造方法として以
下に挙げる方法があった。The chamfer size of this lower end corner part needs to be very small in order to further reduce the blow pie, but especially on the outer circumferential surface and the lower surface that sandwich the corner part, the chamfer size is 0.1111.
! The following manufacturing methods were used to form the minute chamfer at the bottom.
i)外周面において、バイト等による切削加工により面
取りを行なった後、メッキ等の耐摩耗層を形成し、しか
る後テーパ面を形成するための研削加工を行なう(第1
図(イ)〜(ハ))。i) After chamfering the outer circumferential surface by cutting with a cutting tool or the like, a wear-resistant layer such as plating is formed, and then grinding is performed to form a tapered surface (first
Figures (a) to (c)).
11)前記したi)の方法で十分に小さな面取りが得ら
れない場合はi)の工程に続いてざらにリング下面の研
削を行なって微小な面取りを形成する。11) If a sufficiently small chamfer cannot be obtained by the method i) described above, the bottom surface of the ring is roughly ground following the step i) to form a minute chamfer.
1if)メッキ等の耐摩耗層を形成した後、テーパ研削
により下端のコーナー部を鋭角にし、しかるのち微小な
面取り研削を行なう(第2図(イ)〜(ハ))。1if) After forming a wear-resistant layer such as plating, the bottom corner is made into an acute angle by taper grinding, and then fine chamfering is performed (FIGS. 2(A) to 2(C)).
(発明が解決しようとする問題点)
以上に述べた従来方法においては以下のような問題点が
ある。すなわち、i)の方法では耐摩耗層の7形成厚さ
とテーパ研削量を一定にすることが困難であり、最終仕
上げ寸法にばらつきが出やすい。(Problems to be Solved by the Invention) The conventional methods described above have the following problems. That is, in method i), it is difficult to make the thickness of the wear-resistant layer 7 and the amount of taper grinding constant, and the final finished dimensions tend to vary.
11)の方法では工数が多くなり、量産に向かない。Method 11) requires a lot of man-hours and is not suitable for mass production.
またiii>の方法では最終の面取り研削のみで目標と
する微小な面取り寸法を実現することは困難であり工数
も多くなる。Furthermore, in the method iii>, it is difficult to achieve the target minute chamfer size only by the final chamfer grinding, and the number of man-hours increases.
以上に鑑みて本発明は、テーパリング下端のコーナー部
において微小な面取り、特にQ、1JIIl以下の面取
りを形成するための効果的な製造方法を提供することを
目的とするものである。In view of the above, an object of the present invention is to provide an effective manufacturing method for forming a minute chamfer, particularly a chamfer of Q, 1 JIIl or less, at the corner portion of the lower end of a tapering ring.
(問題点を解決するための手段)
前記の目的を可能にする本発明にかかるピストンリング
の製造方法は、リング外周面において上端と下端のコー
ナー部に上下非対称で上端よりも下端の方が小さい面取
りが形成される如く切削等の機械加工を行なう第1工程
と、該外周面に耐摩耗層を形成する第2工程と、該外周
面をテーパ形状にするとともに下端のコーナー部を鋭角
にする如く研削加工を行なう第3工程と、該外周面にバ
フ研摩を施すことによって下端のコーナー部に微小な面
取りを形成する第4工程からなることを特徴とする。(Means for Solving the Problems) A method for manufacturing a piston ring according to the present invention that enables the above-mentioned object is such that the outer peripheral surface of the ring is vertically asymmetrical at the corner portions of the upper end and the lower end, and the lower end is smaller than the upper end. A first step of performing machining such as cutting to form a chamfer, a second step of forming a wear-resistant layer on the outer peripheral surface, and forming the outer peripheral surface into a tapered shape and making the bottom corner part an acute angle. The present invention is characterized by comprising a third step in which a grinding process is performed as shown in FIG.
また、必要に応じてバフ研摩の後、さらにラッピング仕
上げを行なう。Further, after buffing, a lapping finish is further performed if necessary.
以下、本発明を図面を参照して詳述する。Hereinafter, the present invention will be explained in detail with reference to the drawings.
まず第3図に示すように、リング10の外周面12にお
いて上端と下端のコーナー部14.164に上下非対称
で上端コーナー部14よりも下端コーナー部16の方が
小さい面取りが形成される如くバイト18等により切削
加工を行なうが、この面取りは引き続いて行なわれる工
程で硬質クロムメッキ等の耐摩耗層を形成する際の付着
状態を良好にするとともに、メッキ後のばらしを容易に
するためのものである。上下非対称の面取り量は耐摩耗
層の厚さと後のテーパ研削、及び微小面取りの大きさを
考慮して注意障く設定されるが、おおむね上端コーナー
部14に対して下端コーナー部16が1/3〜1/2の
大きさにするのが適当である。First, as shown in FIG. 3, on the outer circumferential surface 12 of the ring 10, the upper and lower corner portions 14 and 164 are cut so that chamfers are vertically asymmetrical and the lower corner portion 16 is smaller than the upper corner portion 14. 18 etc., but this chamfering is to improve the adhesion condition when forming a wear-resistant layer such as hard chrome plating in the subsequent process, and to make it easier to take apart after plating. It is. The amount of vertically asymmetrical chamfering is carefully set in consideration of the thickness of the wear-resistant layer, the subsequent taper grinding, and the size of the micro chamfer, but in general, the lower end corner portion 16 is 1/1/2 of the upper end corner portion 14. It is appropriate to make it 3 to 1/2 the size.
次に第4図に示すように、硬質クロムメッキ等の耐摩耗
層20を形成した後、外周面下端のコーナー部16を鋭
角にする研削加工によりテーパ形状とする。Next, as shown in FIG. 4, after forming a wear-resistant layer 20 such as hard chrome plating, the corner portion 16 at the lower end of the outer peripheral surface is ground into an acute angle to form a tapered shape.
最後に第5図に示すように、外周面12にバフ22を当
てて研摩することによって外周面下端のコーナー部16
に微小な面取りを形成する。弾性が、あり、精密な研摩
能力のあるバフ22を当てることによりバフ22は図、
示するようにリング4の下面に回り込み、コーナー部1
6を挾む外周面と下面において鋭角頂点より各々O,l
n以下の微小な丸みのある面取りが形成される。Finally, as shown in FIG. 5, a buff 22 is applied to the outer circumferential surface 12 and the corner portion 16 at the lower end of the outer circumferential surface
Form a minute chamfer on the surface. By applying the buff 22 which has elasticity and has precise polishing ability, the buff 22 can be polished as shown in the figure.
As shown, it wraps around the bottom surface of the ring 4, and the corner part 1
O, l respectively from the acute angle apex on the outer peripheral surface and lower surface sandwiching 6.
A chamfer with a minute roundness of n or less is formed.
また必要に応じてバフ研摩の後、リングの真円当たりを
良くするために通常のラッピング仕上げを行なう。If necessary, after buffing, a normal lapping finish is performed to improve the perfect circularity of the ring.
(実施例) 第3図に示した方法により、リング径137 mm。(Example) The ring diameter was 137 mm by the method shown in Figure 3.
軸方向幅3.5mm、半径方向幅5.4mmの鋳鉄製ピ
ストンリング素材において、バイト切削によりリング外
周面の上端に0.35m1l、下端に曲率半径0.15
m1の面取りを形成した。A cast iron piston ring material with an axial width of 3.5 mm and a radial width of 5.4 mm has a curvature radius of 0.35 ml at the upper end and a curvature radius of 0.15 at the lower end by cutting with a cutting tool.
A chamfer of m1 was formed.
次に外周面に厚さ0.23mn+の硬質クロムメッキ層
を形成した後、第4図に示した方法により外周面の上端
で0.1.l1m、下端テ0.09111111研削し
て傾斜角度50分のテーパ面を形成するとともに下端の
コーナー部を鋭角にした。Next, after forming a hard chrome plating layer with a thickness of 0.23 mm+ on the outer circumferential surface, the upper end of the outer circumferential surface has a thickness of 0.1 mm+ by the method shown in FIG. 11 m, the lower end was ground by 0.09111111 to form a tapered surface with an inclination angle of 50 minutes, and the lower end corners were made into acute angles.
次に第6図に示すように、各々の間にワッシャー24.
24、・・・を扶んで研摩盤のセンター間にセットされ
た20本のリング10.10、・・・の外周面に、回転
軸にセットしたバフ22を当てて両者を反対方向に回転
すると同時に、バフ22を回転軸方向に送り移動させる
ことによってリング外周面下端のコーナー部に外周面に
おいて鋭角頂点より0.07111111下面において
鋭角頂点より00Q5111111が除去された曲面取
りを形成した。Next, as shown in FIG. 6, between each washer 24.
24,... are set between the centers of the polishing machine 10. When the buff 22 set on the rotating shaft is applied to the outer peripheral surface of 10,... and both are rotated in opposite directions. At the same time, by moving the buff 22 in the direction of the rotation axis, a curved chamfer was formed at the lower corner of the outer circumferential surface of the ring, with 0.07111111 removed from the acute apex on the outer circumferential surface.
最後にラッピングによる仕上げ研摩を行なうことにより
、外周面にJ5ける除去部分が外周面において交差角頂
点より0.0411111.下面において交差角頂点よ
り0.0311IIllの面取りが形成された。Finally, by performing finishing polishing by lapping, the removed portion at J5 on the outer circumferential surface is 0.0411111. A chamfer of 0.0311IIll was formed from the apex of the intersection angle on the lower surface.
バフ研摩の条件は以下の通りであった。The conditions for buffing were as follows.
ワーク回転数:330rpm
バフ回転数:1500rpm
バフ送り移動速度:10m+11/S
バフ材二酸化アルミニウムを含浸させた市販の不織布
(発明の効果)
以上述べたように、本発明の方法はテーパリングの外周
面下端コーナー部の面取りに際して、弾性があって精密
な研摩能力のあるバフ研摩を用、いたことにより微小な
面取りを可能にしたものであり、大量生産にも適した方
法である。本発明によって製造されるテーパリングは特
に、外周下端の面取り部分からの燃焼ガスの吹き抜けを
低減することができる。Work rotation speed: 330 rpm Buff rotation speed: 1500 rpm Buff feed movement speed: 10 m + 11/S Buffing material Commercially available nonwoven fabric impregnated with aluminum dioxide (effects of the invention) As described above, the method of the present invention When chamfering the lower end corners, buff polishing, which is elastic and has precise polishing ability, is used, making it possible to create minute chamfers, making it a method suitable for mass production. The tapered ring manufactured by the present invention can particularly reduce blow-by of combustion gas from the chamfered portion at the lower end of the outer periphery.
第1図と第2図は従来のテーパリングの製造方法を示し
たものである。第3図〜第6図は本発明の製造方法を工
程順に示したものである。
符号の説明
10・・・ピストンリング、12・・・外周面、16・
・・下端コーナー部、22・・・バフ。FIGS. 1 and 2 show a conventional method for manufacturing a taper ring. FIGS. 3 to 6 show the manufacturing method of the present invention in the order of steps. Explanation of symbols 10... Piston ring, 12... Outer circumferential surface, 16...
...Bottom corner, 22...buff.
Claims (3)
造方法であって、外周面において上端と下端のコーナー
部に上下非対称で上端よりも下端の方が小さい面取りが
形成される如く切削等の機械加工を行なう第1工程と、
該外周面に耐摩耗層を形成する第2工程と、該外周面を
テーパ形状にするとともに下端のコーナー部を鋭角にす
る如く研削加工を行なう第3工程と、該外周面にバフ研
摩を施すことによって下端のコーナー部に微小な面取り
を形成する第4工程からなることを特徴とするピストン
リングの製造方法。(1) A method for manufacturing a piston ring having a tapered contact surface, the method being such that a chamfer is formed at the corners of the upper and lower ends of the outer circumferential surface with a vertically asymmetrical chamfer that is smaller at the lower end than at the upper end using a machine such as cutting. A first step of processing;
a second step of forming a wear-resistant layer on the outer circumferential surface; a third step of grinding the outer circumferential surface so as to make it tapered and make the bottom corner part an acute angle; and buffing the outer circumferential surface. A method for manufacturing a piston ring, comprising a fourth step of forming a minute chamfer at the corner of the lower end.
仕上げを行なうことを特徴とする特許請求の範囲第1項
記載のピストンリングの製造方法。(2) The method for manufacturing a piston ring according to claim 1, wherein after the fourth step, the outer peripheral surface is further subjected to lapping finishing.
に形成する微小な面取りは、コーナー部を挾む外周面と
下面において鋭角頂点より各々0、1mm以下の曲面取
りであることを特徴とする特許請求の範囲第1項記載の
ピストンリングの製造方法。(3) The minute chamfer formed at the corner of the lower end of the outer circumferential surface in the fourth step is a curved chamfer of 0.1 mm or less from the acute apex on the outer circumferential surface and the lower surface that sandwich the corner, respectively. A method for manufacturing a piston ring according to claim 1.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP27079084A JPS61152330A (en) | 1984-12-24 | 1984-12-24 | Preparation of piston ring |
CN198585108421A CN85108421B (en) | 1984-12-24 | 1985-11-20 | Method of manufacturing piston ring |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP27079084A JPS61152330A (en) | 1984-12-24 | 1984-12-24 | Preparation of piston ring |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS61152330A true JPS61152330A (en) | 1986-07-11 |
JPH022653B2 JPH022653B2 (en) | 1990-01-18 |
Family
ID=17491033
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP27079084A Granted JPS61152330A (en) | 1984-12-24 | 1984-12-24 | Preparation of piston ring |
Country Status (2)
Country | Link |
---|---|
JP (1) | JPS61152330A (en) |
CN (1) | CN85108421B (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2004111460A1 (en) * | 2003-06-11 | 2004-12-23 | Matsushita Electric Industrial Co., Ltd. | Vane rotary pneumatic pump |
JP2010084869A (en) * | 2008-09-30 | 2010-04-15 | Nippon Piston Ring Co Ltd | Method for manufacturing oil ring body |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN100353047C (en) * | 2004-12-23 | 2007-12-05 | 江苏仪征威龙活塞环有限公司 | Novel process for making piston ring |
US20090174150A1 (en) * | 2008-01-08 | 2009-07-09 | Thomas Smith | Lateral side protection of a piston ring with a thermally sprayed coating |
DE102010008924A1 (en) * | 2010-02-23 | 2011-08-25 | Federal-Mogul Burscheid GmbH, 51399 | Method for producing piston rings |
DE102010048079B4 (en) | 2010-10-09 | 2013-03-28 | Federal-Mogul Burscheid Gmbh | Method for producing a piston ring |
DE102013200261A1 (en) * | 2013-01-10 | 2014-07-10 | Federal-Mogul Burscheid Gmbh | Piston ring for internal combustion engines with increased fatigue strength and method for its production |
CN104289877A (en) * | 2014-08-17 | 2015-01-21 | 成都亨通兆业精密机械有限公司 | Piston ring manufacturing process |
CN104259794A (en) * | 2014-08-17 | 2015-01-07 | 成都亨通兆业精密机械有限公司 | Manufacturing process beneficial to piston ring quality |
-
1984
- 1984-12-24 JP JP27079084A patent/JPS61152330A/en active Granted
-
1985
- 1985-11-20 CN CN198585108421A patent/CN85108421B/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2004111460A1 (en) * | 2003-06-11 | 2004-12-23 | Matsushita Electric Industrial Co., Ltd. | Vane rotary pneumatic pump |
JP2010084869A (en) * | 2008-09-30 | 2010-04-15 | Nippon Piston Ring Co Ltd | Method for manufacturing oil ring body |
Also Published As
Publication number | Publication date |
---|---|
JPH022653B2 (en) | 1990-01-18 |
CN85108421A (en) | 1986-06-10 |
CN85108421B (en) | 1988-10-05 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
LAPS | Cancellation because of no payment of annual fees |