JP2652687B2 - Bellows manufacturing method - Google Patents
Bellows manufacturing methodInfo
- Publication number
- JP2652687B2 JP2652687B2 JP63292314A JP29231488A JP2652687B2 JP 2652687 B2 JP2652687 B2 JP 2652687B2 JP 63292314 A JP63292314 A JP 63292314A JP 29231488 A JP29231488 A JP 29231488A JP 2652687 B2 JP2652687 B2 JP 2652687B2
- Authority
- JP
- Japan
- Prior art keywords
- bellows
- cylindrical
- ring body
- shape
- peripheral 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.)
- Expired - Lifetime
Links
Landscapes
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
- Diaphragms And Bellows (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、軸方向両端に鍔部が一体に設けられたベロ
ーズを製造する方法に関する。Description: TECHNICAL FIELD The present invention relates to a method of manufacturing a bellows having flanges integrally provided at both ends in the axial direction.
〔従来の技術〕 部材間の密封手段等として使用されるベローズの一種
として、第５図に示すように、外周面および内周面に交
互に設けた環状の溝（５）（６）によりジグザグの断面
形状をなすベローズ本体部分（２）の軸方向両端に、鍔
部（３）（４）が一体に形成されたPTFEからなるベロー
ズ（１）がある。2. Description of the Related Art As one type of bellows used as a sealing means between members, as shown in FIG. 5, zigzag is provided by annular grooves (5) and (6) provided alternately on an outer peripheral surface and an inner peripheral surface. A bellows (1) made of PTFE integrally formed with flanges (3) and (4) is provided at both axial ends of the bellows main body (2) having the cross-sectional shape of (1).
このベローズ（１）は、従来、第６図ないし第８図に
順に追って示すように、PTFE焼成の棒状素材（101）を
第６図中２点鎖線（ａ）で示す所要の箇所で切断して円
柱状素材片（102）を切り出し、この円柱状素材片（10
2）を、第７図中２点鎖線（ｂ）（ｃ）で示す形状に切
削加工して、第８図に示すような、軸方向両端に鍔部
（３）（４）を有する筒状体（１′）を得、この筒状体
（１′）の外周面および内周面に前記環状の溝（５）
（６）を加工することによって製造されている。Conventionally, as shown in FIGS. 6 to 8, this bellows (1) cuts a rod-shaped material (101) fired from PTFE at a required position shown by a two-dot chain line (a) in FIG. Cut out the cylindrical material piece (102)
2) is cut into a shape shown by two-dot chain lines (b) and (c) in FIG. 7 to form a cylindrical shape having flanges (3) and (4) at both axial ends as shown in FIG. Body (1 '), and the annular groove (5) is formed on the outer peripheral surface and inner peripheral surface of the cylindrical body (1').
It is manufactured by processing (6).
しかし、上記従来の製法によると、次のような問題が
あった。However, according to the above-mentioned conventional manufacturing method, there are the following problems.
すなわち、環状の溝（５）（６）を加工する前の段階
における筒状体（１′）の製作が、円柱状素材片（10
2）の切削によって行なわれており、第７図に示す円柱
状素材片（102）の切削代（102A）（102B）はすべて廃
材となってしまうので、歩留りがきわめて悪く（平均的
な歩留りは20％前後）、しかも切削工数がかかることか
ら、生産能率が低かった。That is, the production of the cylindrical body (1 ') at the stage before machining the annular grooves (5) and (6) is performed by the cylindrical material piece (10).
Since the cutting allowance (102A) (102B) of the columnar material piece (102) shown in Fig. 7 is all waste material, the yield is extremely poor (the average yield is Production efficiency was low due to the need for cutting man-hours.
本発明はこのような点に鑑み、ベローズ製造における
歩留りおよび生産能率を改善することを目的としてなさ
れたものである。The present invention has been made in view of the above circumstances, and has an object to improve yield and production efficiency in bellows production.
本発明は、軸方向端部に鍔部を有する筒状体を製作
し、該筒状体の外周面および内周面に、交互に環状の溝
を設けて鍔付きのベローズを製造する方法において、前
記鍔部を有する筒状体を、円筒状素材を傘状または平板
状のリング体に切り出す工程と、前記リング体を絞り金
型で鍔部を有する筒状に絞り成形する工程とから得るこ
とを特徴とするものである。The present invention relates to a method of manufacturing a cylindrical body having a flange at an axial end portion, and alternately providing annular grooves on an outer peripheral surface and an inner peripheral surface of the cylindrical body to produce a flanged bellows. A cylindrical body having the flange portion is obtained by cutting a cylindrical material into an umbrella-shaped or plate-shaped ring body, and drawing the ring body into a cylindrical shape having a flange portion with a drawing die. It is characterized by the following.
環状の溝の加工を施してベローズ本体部分を形成する
前の段階における鍔付きの筒状体は、円筒状素材を切り
出したリング体を絞り成形することにより製作するの
で、前記リング体に大きな削り代を設定する必要がな
い。Before forming the bellows main body portion by processing the annular groove, the flanged cylindrical body is manufactured by drawing a ring body cut out of a cylindrical material, so that the ring body is largely cut. There is no need to set a fee.
また、前記リング体は、径方向に対して傾斜した断面
形状をもつ傘状に切出すことによってその後の絞り加工
を容易になすことができるが、延性の良好な素材の場合
は平板状に切出してもよい。Further, the ring body can be easily drawn by cutting it into an umbrella shape having a cross-sectional shape inclined with respect to the radial direction, but in the case of a material having good ductility, it is cut out in a flat plate shape. You may.
以下、本発明に係るベローズの製造方法を、既に述べ
た第５図の形状のベローズ（１）に得る場合を例とし
て、第１図ないし第４図を順次参照しながら説明する。Hereinafter, the method of manufacturing the bellows according to the present invention will be described with reference to FIGS. 1 to 4 in order, taking as an example the case of obtaining the bellows (1) having the shape shown in FIG.
まず第１図において、（11）は焼成したPTFEからなる
円筒状素材で、この円筒状素材（11）を、図中２点鎖線
（ｄ）で示すように軸方向等間隔でテーパ状に切断し、
第２図に示すような、径方向に対して傾斜した断面形状
をもち中央に穴（13）を有する傘状のリング体（12）を
切出す。First, in FIG. 1, (11) is a cylindrical material made of calcined PTFE, and this cylindrical material (11) is cut into a tapered shape at equal intervals in the axial direction as shown by a two-dot chain line (d) in the figure. And
As shown in FIG. 2, an umbrella-shaped ring body (12) having a sectional shape inclined with respect to the radial direction and having a hole (13) in the center is cut out.
次に、上記工程において切出された傘状のリング体
（12）を、第３図に示すような絞り金型（14）の、雄型
である上型（15）と、雌型を形成している中型（16）お
よび下型（17）との間で絞り成形し、第４図に示すよう
に、軸方向両端に鍔部（３）（４）を有する筒状体
（１′）を得る。Next, the umbrella-shaped ring body (12) cut out in the above step is formed into a male upper mold (15) and a female mold of a drawing mold (14) as shown in FIG. As shown in FIG. 4, a cylindrical body (1 ') having flanges (3) and (4) at both ends in the axial direction is drawn and formed between a middle mold (16) and a lower mold (17). Get.
そして、上記成形工程によって得られた筒状体
（１′）の外周面および内周面に、従来方法と同様にベ
ローズ本体部分（２）における環状の溝（５）（６）の
加工を行なうことによって、第５図に示すようなベロー
ズ（１）製品となる。Then, annular grooves (5) and (6) in the bellows main body portion (2) are formed on the outer peripheral surface and the inner peripheral surface of the cylindrical body (1 ') obtained by the above-described molding process in the same manner as in the conventional method. The result is a bellows (1) product as shown in FIG.
上記製法において、リング体（12）を傘状に切出した
のは、このリング体（12）をその後絞り金型（14）で筒
状に絞り成形する際の素材の応力を小さくして成形を容
易化するためであり、該リング体（12）の径方向に対す
る傾斜度は、絞り深さや素材の延性等を考慮して適宜に
設定する。該リング体（12）は、その素材の延性が良好
であれば、平板（円盤）状に切出しても、これを絞り成
形して筒状体（１′）を得ることは十分に可能である。In the above manufacturing method, the ring body (12) was cut into an umbrella shape because the ring body (12) was subsequently formed into a cylindrical shape by a drawing mold (14) by reducing the stress of the material and forming the ring body (12). The degree of inclination of the ring body (12) with respect to the radial direction is appropriately set in consideration of the drawing depth, the ductility of the material, and the like. If the material of the ring body (12) is good in ductility, even if it is cut into a flat plate (disk), it is sufficiently possible to obtain a cylindrical body (1 ') by drawing and forming. .
なお、絞り金型（14）の形状や、上記方法で得られる
筒状体（１′）の形状および製品としてのベローズ
（１）の形状等は、図示のものに限定されるものではな
く、適宜変更が可能であることは勿論である。The shape of the drawing die (14), the shape of the cylindrical body (1 ') obtained by the above method, and the shape of the bellows (1) as a product are not limited to those shown in the drawings. Needless to say, it can be appropriately changed.
以上、本発明によるベローズの製造方法によると、ベ
ローズ本体部分の溝加工を施す前の鍔付きの筒状体を、
絞り成形によって製作しているので、切削工数を削減す
ることができ、また、前記筒状体を得るための素材であ
るリング体を切出す際の切断代も僅かであるため、歩留
りを90％程度に向上でき、さらに、前記リング体は傘状
に切出すことによって前記絞り成形も容易になり、生産
能率が大幅に向上するといった優れた効果を奏する。As described above, according to the bellows manufacturing method of the present invention, a flanged cylindrical body before subjecting the bellows body portion to groove processing,
Since it is manufactured by drawing, the number of man-hours for cutting can be reduced. In addition, since the cutting allowance for cutting out a ring body, which is a material for obtaining the cylindrical body, is small, the yield is reduced by 90%. By cutting the ring body into an umbrella shape, the draw forming is also facilitated, and an excellent effect of greatly improving the production efficiency is achieved.
第１図ないし第４図は本発明の製造方法の一実施例を順
を追って示す工程説明図、第５図は製品としてのベロー
ズを示す断面図、第６図ないし第８図は従来の製造方法
を順を追って示す工程説明図である。 （１）ベローズ、（１′）筒状体 （２）ベローズ本体部分、（３）（４）鍔部 （５）（６）環状の溝、（11）円筒状素材 （12）リング体、（13）穴、（14）絞り金型 （15）上型、（16）中型、（17）下型1 to 4 are process explanatory views showing one embodiment of the manufacturing method of the present invention in order, FIG. 5 is a sectional view showing a bellows as a product, and FIGS. 6 to 8 are conventional manufacturing methods. It is process explanatory drawing which shows a method in order. (1) Bellows, (1 ') cylindrical body (2) bellows main body part, (3) (4) flange part (5) (6) annular groove, (11) cylindrical material (12) ring body, ( 13) hole, (14) drawing die (15) upper die, (16) middle die, (17) lower die
Claims (1)
状体（１′）を製作し、該筒状体（１′）の外周面およ
び内周面に、交互に環状の溝（５）（６）を設けて鍔付
きのベローズ（１）を製造する方法において、前記鍔部
（３）（４）を有する筒状体（１′）は、円筒状素材
（11）を傘状または平板状のリング体（12）に切り出す
工程と、前記リング体（12）を絞り金型（14）で鍔部
（３）（４）を有する筒状に絞り成形する工程とから得
ることを特徴とするベローズの製造方法。1. A cylindrical body (1 ') having a flange (3) (4) at an axial end is manufactured, and the cylindrical body (1') is alternately provided on an outer peripheral surface and an inner peripheral surface thereof. In the method for manufacturing a bellows with a flange by providing annular grooves (5) and (6), the cylindrical body (1 ') having the flanges (3) and (4) is made of a cylindrical material (11). ) Into an umbrella-shaped or plate-shaped ring body (12), and drawing the ring body (12) into a cylindrical shape having flanges (3) and (4) with a drawing die (14). A method for producing bellows, characterized in that the method is obtained from:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63292314A JP2652687B2 (en) | 1988-11-21 | 1988-11-21 | Bellows manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63292314A JP2652687B2 (en) | 1988-11-21 | 1988-11-21 | Bellows manufacturing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02142974A JPH02142974A (en) | 1990-06-01 |
| JP2652687B2 true JP2652687B2 (en) | 1997-09-10 |
Family
ID=17780168
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63292314A Expired - Lifetime JP2652687B2 (en) | 1988-11-21 | 1988-11-21 | Bellows manufacturing method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2652687B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5848617A (en) * | 1994-07-08 | 1998-12-15 | Nok Corporation | Bellows and method for manufacturing the same |
-
1988
- 1988-11-21 JP JP63292314A patent/JP2652687B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02142974A (en) | 1990-06-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4041754A (en) | Process for preparing a pole piece for the rotor of a generator | |
| CN108971295A (en) | Method for manufacturing blanking part | |
| JP2652687B2 (en) | Bellows manufacturing method | |
| KR920007455B1 (en) | Method for manufacturing a single piece type valve sleeve | |
| JP2001129635A (en) | Method of manufacturing deformed ring | |
| US6484547B1 (en) | Sheet metal member and method of manufacturing the member | |
| JPS6134889B2 (en) | ||
| JPS5966917A (en) | Manufacture of pipe whose thickness is varied in axial direction | |
| JPS58120433A (en) | Manufacture of clutch gear | |
| SU590053A1 (en) | Method of making annular articles | |
| JPS62292219A (en) | Manufacture of branch pipe joint | |
| SU804131A1 (en) | Method of producing bevelled annular parts | |
| JPH01197029A (en) | Insert split die and its manufacture | |
| JPS5997734A (en) | Forming method of impeller for centrifugal compressor | |
| JPH0262100B2 (en) | ||
| JPS59107740A (en) | Production of inner race for uniform-speed joint | |
| JPH0724652A (en) | Machining of forming die | |
| JPH0140608Y2 (en) | ||
| JPH0723079Y2 (en) | Closed mold for forging | |
| JPH06179033A (en) | Annular groove deformation processing method and using die in this method | |
| JPH0381023A (en) | Manufacture of flange by press working | |
| JPS6188934A (en) | Manufacture of key blank | |
| JPS6146344A (en) | Production of collared cylindrical member | |
| SU1505633A1 (en) | Method of producing cylindrical stepped parts | |
| JPS62107661A (en) | Resin molding and manufacture thereof |