JP3288593B2 - Method of forming O-ring mounting groove - Google Patents
Method of forming O-ring mounting grooveInfo
- Publication number
- JP3288593B2 JP3288593B2 JP33997596A JP33997596A JP3288593B2 JP 3288593 B2 JP3288593 B2 JP 3288593B2 JP 33997596 A JP33997596 A JP 33997596A JP 33997596 A JP33997596 A JP 33997596A JP 3288593 B2 JP3288593 B2 JP 3288593B2
- Authority
- JP
- Japan
- Prior art keywords
- groove
- mounting groove
- ring mounting
- forging
- forming
- 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 - Lifetime
Links
Landscapes
- Forging (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、冷温間鍛造による
平面用Ｏリング取付溝の形成方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for forming a flat O-ring mounting groove by cold and hot forging.
【０００２】[0002]
【従来の技術】Ｏリングは、構造が簡単で性能の信頼性
が高いので流体の密封装置として広く用いられている。
密閉部に設けたＯリング取付溝に円形断面のゴム製リン
グを挿入し、適当なつぶし代を与えて用いる。圧力がか
かると、Ｏリングは溝の壁面に押付けられて 隙間を塞
ぎ密封する。2. Description of the Related Art O-rings are widely used as fluid sealing devices because of their simple structure and high reliability in performance.
A rubber ring having a circular cross section is inserted into an O-ring mounting groove provided in the sealing portion, and an appropriate crushing margin is given to use. When pressure is applied, the O-ring is pressed against the wall of the groove, closing the gap and sealing.
【０００３】Ｏリングが所期の特性を発揮するために
は、Ｏリングの寸法に適応した取付溝を、精度よく形成
する必要がある。ＪＩＳ Ｂ２４０６（Ｏリング取付溝
部の形状・寸法）にはＯリングの寸法に応じた取付溝の
寸法を規定している。この規格において、例えば、平面
シール用Ｏリング取付溝では溝幅の寸法公差は０．２５
ｍｍ、溝深さの寸法許容差は０．０５ｍｍとされてい
る。In order for the O-ring to exhibit the desired characteristics, it is necessary to accurately form a mounting groove adapted to the size of the O-ring. JIS B2406 (shape and size of O-ring mounting groove) defines the size of the mounting groove according to the size of the O-ring. In this standard, for example, in the case of an O-ring mounting groove for a flat seal, the dimensional tolerance of the groove width is 0.25.
mm and the dimensional tolerance of the groove depth are 0.05 mm.
【０００４】[0004]
【発明が解決しようとする課題】このようなＯリング取
付溝は、通常、いわゆる突っ切りバイトを使用して、切
削加工によって形成される。突っ切りバイトでは、その
刃幅が溝幅によって制限されるうえ、溝の両側面に対す
る横逃げ角を刃幅の両側に備える必要があるため実質的
な刃幅は小さくなり、刃先の摩耗や欠損が生じやすく、
バイト寿命が短いという問題がある。特に、平面シール
用Ｏリング取付溝の場合には、溝形状が円弧を描いてい
るので、溝の外径側を切削する刃先部の横逃げ角を大き
くする必要がある。そのため、寸法精度の高い平面シー
ル用Ｏリング取付溝を切削加工するためのバイトの寿命
は一層短くなり、加工コストが高まるという問題があ
る。Such an O-ring mounting groove is usually formed by cutting using a so-called parting tool. In a parting-off tool, the blade width is limited by the groove width, and it is necessary to provide lateral clearance angles to both sides of the groove on both sides of the blade width. Easy to occur,
There is a problem that the tool life is short. In particular, in the case of the O-ring mounting groove for a flat seal, since the groove shape is circular, it is necessary to increase the lateral clearance angle of the cutting edge for cutting the outer diameter side of the groove. Therefore, there is a problem that the life of the cutting tool for cutting the O-ring mounting groove for the planar seal having high dimensional accuracy is further shortened, and the processing cost is increased.
【０００５】本発明は、上記の現状に鑑みてなされたも
ので、その目的とするところは、加工精度の高い平面シ
ール用Ｏリング取付溝を経済的に形成する方法を提供す
ることにある。The present invention has been made in view of the above situation, and an object of the present invention is to provide a method for economically forming an O-ring mounting groove for a flat seal with high processing accuracy.
【０００６】[0006]
【課題を解決するための手段】上記目的を達成するため
に、本発明のＯリング取付溝の形成方法は、平面にＯリ
ング取付溝を形成する方法であって、冷温間鍛造によっ
て予備成形溝を形成する予備鍛造工程と、冷温間鍛造に
よって前記予備成形溝を仕上成形する仕上鍛造工程とを
備え、前記予備成形溝の形状として、（１）前記平面と
前記予備成形溝の壁面とがなす角の補角が６０〜８５度
であって、（２）前記予備成形溝の最大外径は仕上成形
時の外径より大きく、また、前記予備成形溝の最小内径
は仕上成形時の内径より小さいものとし、（３）前記予
備成形溝の容積は仕上成形後の溝の容積と等しいものと
することを特徴とする。In order to achieve the above-mentioned object, a method for forming an O-ring mounting groove according to the present invention is a method for forming an O-ring mounting groove on a flat surface, wherein a preformed groove is formed by cold and hot forging. And a finish forging step of finish forming the preformed groove by cold and hot forging. The shape of the preformed groove is as follows: (1) The plane is formed by the wall surface of the preformed groove. (2) The maximum outer diameter of the preformed groove is larger than the outer diameter at the time of finish forming, and the minimum inner diameter of the preformed groove is larger than the inner diameter at the time of finish forming. (3) The volume of the preformed groove is equal to the volume of the groove after finish forming.
【０００７】[0007]
【発明の実施の形態】本発明のＯリング取付溝の形成方
法は、予備鍛造および仕上鍛造の両工程を冷温間鍛造に
よって行い、金属部材に平面用Ｏリング取付溝を形成す
るものである。ここに冷温間鍛造とは、材料を加熱する
ことなく室温において鍛造するいわゆる冷間鍛造と、６
００℃以下の温度で材料を加熱した後鍛造する温間鍛造
とを含むものとする。BEST MODE FOR CARRYING OUT THE INVENTION According to the method of forming an O-ring mounting groove of the present invention, both a preliminary forging and a finish forging are performed by cold and warm forging to form a flat O-ring mounting groove in a metal member. Here, cold forging refers to so-called cold forging, in which a material is forged at room temperature without heating,
Warm forging in which the material is heated at a temperature of 00 ° C. or lower and then forged.
【０００８】前記冷温間鍛造における鍛造前の材料の加
熱温度の上限を６００℃としたのは、前記加熱温度が６
００℃を超えて高い温度になると、冷却時の収縮量が大
きくなり、製品の寸法安定性を欠くばかりか、加熱冷却
中の酸化によって表面品質が劣化することによる。予備
鍛造工程は、冷温間鍛造によってＯリング取付溝を刻設
する平面（刻設面と称する）に予備成形溝を刻設する工
程である。また、仕上鍛造工程は、冷温間鍛造によって
予備成形溝を寸法精度の高いＯリング取付溝に形成する
ために行う仕上成形の工程である。The reason why the upper limit of the heating temperature of the material before forging in the cold and hot forging is set to 600 ° C. is that the heating temperature is 6 ° C.
When the temperature is higher than 00 ° C., the amount of shrinkage at the time of cooling becomes large, and not only the dimensional stability of the product is lost, but also the surface quality is deteriorated by oxidation during heating and cooling. The preliminary forging step is a step of engraving a preformed groove on a plane (an engraved surface) on which the O-ring mounting groove is engraved by cold and hot forging. The finish forging step is a finish forming step performed to form a preformed groove into an O-ring mounting groove having high dimensional accuracy by cold / hot forging.
【０００９】予備鍛造工程は、１回の鍛造工程で行われ
ることが好ましいが、溝を刻設しようとする金属部材の
変形抵抗が大きいとか、変形能が小さくて成形困難な場
合等には鍛造工程を２回以上としてもよい。この工程
は、仕上鍛造工程においてＯリング取付溝形状に仕上げ
るときに高い寸法精度を得るために必須の工程である。
予備成形溝の横断面形状は、台形、割円、楕円部分等が
好ましい。ここに、刻設面と予備成形溝の外壁面または
内壁面とがなす角の補角を６０〜８５度とする。予備成
形溝の横断面形状が割円、楕円部分等の曲線をなす場合
には、曲線部分の端末部における接線と刻設面とがなす
角の補角を６０〜８５度とする。前記角度が過小である
と、仕上鍛造工程において肉廻りが不十分となり、形状
不良発生の原因となる。また、前記角度が過大であれ
ば、仕上鍛造工程における寸法精度を損う。なお、横断
面形状が台形の溝の場合には、台形のかど部に面取りま
たは小さな半径のぬすみを設けてもよい。The pre-forging step is preferably performed in a single forging step. However, if the metal member for which a groove is to be formed has a large deformation resistance or has a low deformability and is difficult to form, forging is performed. The process may be performed twice or more. This step is an essential step for obtaining high dimensional accuracy when finishing the O-ring mounting groove shape in the finish forging step.
The cross-sectional shape of the preformed groove is preferably a trapezoid, a split circle, an ellipse, or the like. Here, the supplementary angle of the angle formed by the engraving surface and the outer wall surface or the inner wall surface of the preformed groove is set to 60 to 85 degrees. When the cross-sectional shape of the preformed groove forms a curve such as a split circle or an elliptical portion, the supplementary angle between the tangent at the end of the curved portion and the engraving surface is set to 60 to 85 degrees. If the angle is too small, the surrounding area becomes insufficient in the finish forging process, which causes a shape defect. If the angle is too large, the dimensional accuracy in the finish forging process is impaired. If the cross-sectional shape is a trapezoidal groove, the corner of the trapezoid may be chamfered or provided with a small radius.
【００１０】予備成形溝の外径は深さ方向の位置によっ
て異なり、開口部で最大であり、底部で最小となる。ま
た、内径は開口部で最小であり底部で最大となる。外径
の最大値（最大外径と称する）は仕上成形時の外径より
大きく、また内径の最小値（最小内径と称する）は仕上
成形時の内径より小さく形成する。これによって仕上鍛
造時に肉廻りが良好となり、寸法精度が向上する。The outer diameter of the preformed groove differs depending on the position in the depth direction, and is maximum at the opening and minimum at the bottom. The inner diameter is minimum at the opening and maximum at the bottom. The maximum outer diameter (referred to as the maximum outer diameter) is larger than the outer diameter at the time of finish molding, and the minimum inner diameter (referred to as the minimum inner diameter) is smaller than the inner diameter at the time of finish molding. As a result, the roundness is improved during finish forging, and the dimensional accuracy is improved.
【００１１】予備成形溝の容積を、形成しようとするＯ
リング取付溝の容積と等しくすることによって仕上鍛造
工程における肉廻りを良好にする。予備成形溝の容積
は、仕上成形後の溝の容積と等しいことが好ましいが、
５％以下において過小であってもよい。[0011] The volume of the preformed groove is set to O
By making the volume equal to the volume of the ring mounting groove, the roundness in the finish forging process is improved. The volume of the preformed groove is preferably equal to the volume of the groove after the finish molding,
It may be too small at 5% or less.
【００１２】[0012]
【実施例】以下、本発明の実施例について説明する。本
発明の一実施例のＯリング取付溝の形成方法を図１〜図
３に示す。冷間鍛造によって、直径１６ｍｍ×長さ２７
ｍｍのニッケルの鍛造用スラグ１から中間素形品を経て
素形品とした。素形品を予備鍛造して、頭部座面４に予
備成形溝５を形成した。予備成形溝５は軸に対して同心
円状で、最大外径ｄ1＝２２．２ｍｍ、最小内径ｄ2＝１
６．５ｍｍ、深さｔ1＝１．７ｍｍとし、外壁面６と頭
部座面４とがなす角の補角α1、および内壁面７と頭部
座面４とがなす角の補角α2の値がいずれも８３度の横
断面形状台形状の溝とした。なお、溝底部８の隅角には
半径ｒ1＝０．５ｍｍの隅肉を設けた。Embodiments of the present invention will be described below. 1 to 3 show a method of forming an O-ring mounting groove according to an embodiment of the present invention. By cold forging, diameter 16mm x length 27
From the nickel forging slag 1 of 1 mm through the intermediate shaped product, the shaped product was obtained. The preform was pre-forged to form a preformed groove 5 in the head seat surface 4. The preformed groove 5 is concentric with the shaft, with a maximum outer diameter d 1 = 22.2 mm and a minimum inner diameter d 2 = 1.
6.5 mm, depth t 1 = 1.7 mm, supplementary angle α 1 between the outer wall surface 6 and the head seat surface 4, and supplement angle of the angle between the inner wall surface 7 and the head seat surface 4 the value of alpha 2 has a cross-sectional shape base groove in the shape of either 83 degrees. In addition, a fillet with a radius r 1 = 0.5 mm was provided at the corner of the groove bottom 8.
【００１３】次に、仕上鍛造工程として冷間鍛造によっ
て図１（ｅ）に示す内圧用Ｏリング取付溝９を形成し
た。内圧用Ｏリング取付溝９の寸法は、外径ｄ3＝２
２．０ｍｍ、溝幅ｂ2＝２．７ｍｍ（内径ｄ4＝１６．６
ｍｍ）、深さｔ2＝１．７ｍｍとした。溝底部１０の隅
角には半径ｒ2＝０．５ｍｍの隅肉を設けた。仕上成形
溝の容積と予備成形溝の容積との比は１：０．９８であ
る。Next, the internal pressure O-ring mounting groove 9 shown in FIG. 1E was formed by cold forging as a finish forging process. The dimensions of the O-ring mounting groove 9 for internal pressure are as follows: outer diameter d 3 = 2
2.0 mm, groove width b 2 = 2.7 mm (inner diameter d 4 = 16.6)
mm) and the depth t 2 = 1.7 mm. A fillet with a radius r 2 = 0.5 mm was provided at the corner of the groove bottom 10. The ratio of the volume of the finish forming groove to the volume of the preforming groove is 1: 0.98.
【００１４】以上のようにして内圧用Ｏリング取付溝９
を成形した結果、５００個の成形後においても溝各部の
寸法は±０．０５ｍｍの精度を保った。以上のように、
本発明によれば、加工精度の高い平面シール用Ｏリング
取付溝を経済的に形成する方法を提供することができ
る。As described above, the internal pressure O-ring mounting groove 9
As a result, the dimensions of each part of the groove maintained the accuracy of ± 0.05 mm even after the formation of 500 pieces. As mentioned above,
ADVANTAGE OF THE INVENTION According to this invention, the method of economically forming the O-ring mounting groove for planar seals with high processing accuracy can be provided.
【図１】本発明の実施例を示す側面部分断面図であり、
（ａ）は鍛造用スラグ、（ｂ）は予備鍛造品、（ｃ）は
仕上鍛造品を示す。FIG. 1 is a partial side sectional view showing an embodiment of the present invention;
(A) shows a slag for forging, (b) shows a preliminary forged product, and (c) shows a finished forged product.
【図２】本発明の一実施例における予備鍛造品の予備成
形溝部を示す部分断面詳細図である。FIG. 2 is a detailed partial cross-sectional view showing a preformed groove of a preforged product according to one embodiment of the present invention.
【図３】本発明の一実施例における仕上鍛造品の内圧用
Ｏリング取付溝部を示す部分断面詳細図である。FIG. 3 is a detailed partial cross-sectional view showing an O-ring mounting groove for internal pressure of a finish forged product according to one embodiment of the present invention.
１ 鍛造用スラグ ４ 頭部座面 ５ 予備成形溝 ６ 外壁面 ７ 内壁面 ８ 溝底部 ９ 内圧用Ｏリング取付溝 １０ 溝底部 DESCRIPTION OF SYMBOLS 1 Forging slag 4 Head seating surface 5 Preforming groove 6 Outer wall surface 7 Inner wall surface 8 Groove bottom 9 O-ring mounting groove for internal pressure 10 Groove bottom
───────────────────────────────────────────────────── フロントページの続き (72)発明者 中村 稔 愛知県名古屋市緑区鳴海町細根118−232 (72)発明者 本田 久 愛知県岡崎市本宿町字上三本松23−27 (56)参考文献 特開 平２−241640（ＪＰ，Ａ) 特開 昭61−63332（ＪＰ，Ａ) 特開 平２−6032（ＪＰ，Ａ) 特開 昭57−47531（ＪＰ，Ａ) 特開 平９−52140（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) B21J 1/00 - 13/14 B21J 17/00 - 19/04 B21K 1/00 - 31/00 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Minoru Nakamura 118-232 Hosone, Narumi-cho, Midori-ku, Nagoya-shi, Aichi (72) Inventor Hisashi 23-27, Kamisanbonmatsu, Honjuku-cho, Okazaki-shi, Aichi (56) Reference Document JP-A-2-241640 (JP, A) JP-A-61-63332 (JP, A) JP-A-2-6032 (JP, A) JP-A-57-47531 (JP, A) 52140 (JP, A) (58) Fields investigated (Int. Cl. 7 , DB name) B21J 1/00-13/14 B21J 17/00-19/04 B21K 1/00-31/00
Claims (1)
あって、冷温間鍛造によって予備成形溝を形成する予備
鍛造工程と、冷温間鍛造によって前記予備成形溝を仕上
成形する仕上鍛造工程とを備え、前記予備成形溝の形状
として、（１）前記平面と前記予備成形溝の壁面とがな
す角の補角が６０〜８５度であって、（２）前記予備成
形溝の最大外径は仕上成形時の外径より大きく、また、
前記予備成形溝の最小内径は仕上成形時の内径より小さ
いものとし、（３）前記予備成形溝の容積は仕上成形後
の溝の容積と等しいものとすることを特徴とする平面用
Ｏリング取付溝の形成方法。1. A method for forming an O-ring mounting groove in a plane, comprising: a pre-forging step of forming a pre-formed groove by cold / hot forging; and a finish forging step of finish-forming the pre-formed groove by cold / hot forging. Wherein the supplementary angle of the plane formed by the plane and the wall surface of the preformed groove is 60 to 85 degrees, and (2) the maximum outer diameter of the preformed groove. Is larger than the outer diameter at the time of finish molding, and
The minimum inner diameter of the preformed groove is smaller than the inner diameter at the time of finish molding, and (3) the volume of the preformed groove is equal to the volume of the groove after the finish molding. How to form grooves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33997596A JP3288593B2 (en) | 1996-12-19 | 1996-12-19 | Method of forming O-ring mounting groove |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33997596A JP3288593B2 (en) | 1996-12-19 | 1996-12-19 | Method of forming O-ring mounting groove |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH10180392A JPH10180392A (en) | 1998-07-07 |
| JP3288593B2 true JP3288593B2 (en) | 2002-06-04 |
Family
ID=18332548
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP33997596A Expired - Lifetime JP3288593B2 (en) | 1996-12-19 | 1996-12-19 | Method of forming O-ring mounting groove |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3288593B2 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4592501B2 (en) * | 2005-06-06 | 2010-12-01 | 三菱電機株式会社 | Gas insulation equipment |
| CN102294423B (en) * | 2011-08-23 | 2013-08-07 | 山东理工大学 | Cold-forging-warm-forging numerically-controlled forming method for forged and pressed component |
| CN104043765B (en) * | 2014-05-13 | 2016-05-04 | 盐城理研精密锻造有限公司 | Universal joint warm forging essence forming technology |
| CN105945519A (en) * | 2016-05-24 | 2016-09-21 | 江苏创汽车零部件有限公司 | Cold forging forming technology of hollow pipe output shaft |
| CN112893729A (en) * | 2021-01-15 | 2021-06-04 | 南昌航空大学 | Method for forging branch type forge piece |
| CN116274784B (en) * | 2022-12-20 | 2023-12-15 | 湖南中创空天新材料股份有限公司 | Method for improving flaw detection qualification rate of aluminum alloy ring finished product |
-
1996
- 1996-12-19 JP JP33997596A patent/JP3288593B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH10180392A (en) | 1998-07-07 |
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