JPS63256227A - Manufacture of elliptical bellows - Google Patents
Manufacture of elliptical bellowsInfo
- Publication number
- JPS63256227A JPS63256227A JP9101587A JP9101587A JPS63256227A JP S63256227 A JPS63256227 A JP S63256227A JP 9101587 A JP9101587 A JP 9101587A JP 9101587 A JP9101587 A JP 9101587A JP S63256227 A JPS63256227 A JP S63256227A
- Authority
- JP
- Japan
- Prior art keywords
- bellows
- circular
- elliptical
- tension
- mold
- 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
- 238000004519 manufacturing process Methods 0.000 title claims description 19
- 238000000034 method Methods 0.000 claims description 16
- 238000000465 moulding Methods 0.000 claims description 5
- 239000007788 liquid Substances 0.000 abstract 3
- 230000002093 peripheral effect Effects 0.000 abstract 1
- 238000007789 sealing Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910000906 Bronze Inorganic materials 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 239000010974 bronze Substances 0.000 description 1
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 230000037303 wrinkles Effects 0.000 description 1
Landscapes
- Diaphragms And Bellows (AREA)
- Shaping Of Tube Ends By Bending Or Straightening (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は、楕円形ベローズの製造方法に係り、特に、楕
円形ベローズを安価に製造するに好適な、楕円形ベロー
ズの製造方法に関するものである。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a method for manufacturing an elliptical bellows, and particularly to a method for manufacturing an elliptical bellows, which is suitable for manufacturing an elliptical bellows at low cost. be.
［従来の技術］
従来、楕円形ベローズは、たとえば特開昭６１−９５９
２７号公報に記載のように、楕円形の素管を使用し、且
つ半楕円形をなしその一部に***部を形成してなる成形
型によって製造していた。[Prior Art] Conventionally, elliptical bellows are disclosed in Japanese Patent Application Laid-open No. 61-959, for example.
As described in Japanese Patent Application No. 27, an elliptical blank tube was used and a semi-elliptical mold was used to form a protuberance in a part of the mold.
しかし、高価な楕円形の素管が必要であり、しかも成形
型に前記***部を設けたことにより、成形品の内側を流
れる流体の流路の断面積が小さくなる点については、考
慮されていなかった。However, it does not take into consideration that an expensive oval-shaped raw tube is required, and that the provision of the protrusion in the mold reduces the cross-sectional area of the fluid flow path inside the molded product. There wasn't.
［発明が解決しようとする問題点コ
上記従来技術は、素管として高価な異形管である楕円形
の素管を用いる必要があり、コスト増となっていた。ま
た、成形型に***部を設けたことによって、成形品内側
の、前記***部に対応する個所で流路面積が小さくなる
という問題点もあった。[Problems to be Solved by the Invention] The above-mentioned prior art requires the use of an expensive, irregularly shaped, elliptical raw tube as the raw tube, resulting in an increase in cost. Furthermore, by providing the mold with a raised part, there is also a problem that the area of the flow path becomes smaller at a location inside the molded product corresponding to the raised part.
本発明は、上記した従来技術の問題点を改善して、安価
な円形の素管を用い、しかも成形品の流路面積が小さく
ならない、楕円形ベローズの製造方法の提供を、その目
的とするものである。An object of the present invention is to improve the above-mentioned problems of the prior art and provide a method for manufacturing an elliptical bellows using an inexpensive circular raw tube without reducing the flow path area of the molded product. It is something.
［問題点を解決するための手段］
上記問題点を解決するための１本発明に係る楕円形ベロ
ーズの製造方法の構成は、円形の素管から、所定ピッチ
の山部、谷部を有する楕円形ベローズを製造する方法に
おいて、内径面で円形を形成する複数組の、２分割した
分割型からなる成形型を使用し、素管の外径側へ前記分
割型を互いに所定距離だけ離間して装着し、前記素管内
部へ液圧を負荷して張出し加工するとともに、該素管を
軸方向へ押圧することにより円形ベローズを成形したの
ち、この円形ベローズ内部から液圧を排除するとともに
、前記分割型を外し、この円形ベローズ内へ、引張り型
を、前記円形ベローズの山部。[Means for Solving the Problems] One method of manufacturing an elliptical bellows according to the present invention for solving the above-mentioned problems has a structure in which an elliptical bellows having peaks and valleys at a predetermined pitch is formed from a circular blank tube. In a method for manufacturing a shaped bellows, a mold consisting of a plurality of sets of split molds each forming a circular shape on the inner diameter surface is used, and the split molds are spaced apart from each other by a predetermined distance toward the outer diameter side of the blank pipe. After mounting, applying hydraulic pressure to the inside of the raw pipe to make it stretch, and pressing the raw pipe in the axial direction to form a circular bellows, the hydraulic pressure is removed from the inside of the circular bellows, and the Remove the split mold, insert the tension mold into the circular bellows, and insert the tension mold into the crest of the circular bellows.
谷部と該引張り型とが嵌め合いになるようにして互いに
対向して１個ずつ挿入し、両引張り型を互いに離間する
方向へ所定量だけ引張って、前記円形ベローズをその半
径方向へ引伸ばすことにより、楕円形ベローズを成形す
るようにしたものである。Insert them one by one facing each other so that the troughs and the tension molds fit together, and pull both tension molds by a predetermined amount in the direction away from each other to stretch the circular bellows in its radial direction. As a result, an elliptical bellows is formed.
さらに詳しくは、円形の素管を用い、まず分割型により
円形ベローズを成形したのち、上、下２個の引張り型に
より引張り加工を行なうことにより、楕円形ベローズを
成形するようにしたものである。More specifically, using a circular blank tube, a circular bellows is first formed using a split mold, and then an elliptical bellows is formed by performing tension processing using two upper and lower tension molds. .
［作用コ
本発明は、高価な楕円形の素管を使用せずに楕円形ベロ
ーズを製造することを可能にするために、まず安価な円
形素管を用いて円形ベローズを成形した後に、この円形
ベローズの内側へ、該円形ベローズの内側の波形と同様
の形状を有する引張り型を２個挿入し、これらの引張り
型によって引張り加工することによって、所望の楕円形
ベローズを、容易に製造することができる。[Function] In order to make it possible to manufacture an oval bellows without using an expensive oval blank tube, the present invention first molds a circular bellows using an inexpensive circular blank tube, and then molds the circular bellows. To easily manufacture a desired elliptical bellows by inserting two tension molds having the same shape as the waveform inside the circular bellows and performing tension processing using these tension molds. Can be done.
［実施例］
以下１本発明の実施例によって、図面を用いて説明する
。[Example] An example of the present invention will be described below with reference to the drawings.
第１図は、本発明の一実施例に係る楕円形ベローズの製
造方法の実施に使用される液圧成形装置の正面図（ただ
し、引張り型による楕円形ベローズの成形時）、第２図
は、この第１図の■−■矢視平面断面図（ただし、分割
型による円形ベローズの成形時）、第３図は、第１図の
■−■矢視側断面図である。FIG. 1 is a front view of a hydroforming device used to carry out the method for manufacturing an elliptical bellows according to an embodiment of the present invention (when forming an elliptical bellows by a tension mold), and FIG. , FIG. 3 is a cross-sectional side view taken along the line ■--■ in FIG. 1 (when a circular bellows is formed by a split mold), and FIG.
図において、１は、楕円形ベローズ（後述する第５，６
図に示すもの）を製造する素材となる円形の素管である
。In the figure, 1 indicates an oval bellows (5th and 6th bellows to be described later).
This is a circular pipe that is used as the material for manufacturing the product (shown in the figure).
まず、この素管１から円形ベローズ（図示せず）を成形
するに使用される成形型２７．この円形ベローズから前
記楕円形ベローズを成形するに使用される上、下引張り
型２３．２４を、それぞれ第２．３図を用いて説明する
。First, a mold 27 is used to mold a circular bellows (not shown) from the raw tube 1. The upper and lower tension molds 23 and 24 used to form the oval bellows from the circular bellows will be explained with reference to FIGS. 2.3.
前記成形型２７は、２分割（すなわち半割れ）の３組の
分割型、すなわち１１．１６と１２，１７と１３．１８
の３組からなり、各組の分割型は。The mold 27 is divided into three sets of two (that is, half-split) molds, namely, 11.16, 12, 17, and 13.18.
It consists of three sets, and the division type of each set is.
一体化したとき、内径が素管１の外径とほぼ等しく、内
径面の形状が、前記円形ベローズの谷部の形状と等しい
成形部２７ａと、この成形部２７ａと一体で、その厚さ
が前記成形部２７ａよりも厚い基部２７ｂとを有するも
のであり、これら分割型を軸方向、すなわち矢印方向へ
移動させて互いに重ねたとき、前記各成形部２７ａの厚
さ中心間距離が前記円形ベローズのピッチと等しくなる
ものである。そして、分割型の一方の半割れ１１゜１２
．１３は１分割支持板１０に取付けられたロッド１４の
案内によって、素管１の軸方向へ移動自在である。同様
に、分割型の他方の半割れ１６゜１７．１８は、分割型
支持板１５に取付けられたロッド１９の案内によって、
前記軸方向へ移動自在である。When integrated, there is a molded part 27a whose inner diameter is approximately equal to the outer diameter of the base pipe 1 and whose inner diameter surface is the same as the shape of the valley of the circular bellows, and which is integral with this molded part 27a and whose thickness is and a base portion 27b thicker than the molded portion 27a, and when these split molds are moved in the axial direction, that is, in the direction of the arrow, and stacked on top of each other, the distance between the thickness centers of the molded portions 27a becomes equal to the circular bellows. It is equal to the pitch of And one half of the split mold 11°12
．． 13 is movable in the axial direction of the raw tube 1 by being guided by a rod 14 attached to the one-piece support plate 10. Similarly, the other half of the split mold 16° 17.18 is guided by a rod 19 attached to the split mold support plate 15.
It is movable in the axial direction.
前記上引張り型２３と下引張り型２４は、互いに同一の
形状を有するものであり、これら上、下引張り型２３．
２４は、前記楕円形ベローズの長径側端部と同一外形を
有し、且つ前記円形ベローズの山部１ａ、谷部へ嵌め合
わせることができる波形部２３ａ、２４ａを形成してな
るものである。The upper tension mold 23 and the lower tension mold 24 have the same shape.
Reference numeral 24 has corrugated portions 23a and 24a which have the same outer shape as the longer diameter end of the elliptical bellows and can fit into the peaks 1a and troughs of the circular bellows.
そして、上引張り型２３．下引張り型２４は、それぞれ
両端で、上引張り型支持板２３ｂ、下引張り型支持板２
４ｂへ固定することができるようになっている。And upper tension type 23. The lower tension type support plate 23b and the lower tension type support plate 2 are provided at both ends of the lower tension type support plate 24, respectively.
4b.
次に、液圧成形装置の詳細を説明する。Next, details of the hydroforming apparatus will be explained.
２．３は、それぞれ取付板２ｂ、３ｂに固定されたシリ
ンダ、２ａ、３ａは、これらシリンダ２゜３のスピンド
ル、４は、このスピンドル２ａの先端に取付けられ、内
挿の０リング６とによって、素管１の一端を、封止して
支持するシールホルダ、５は、スピンドル３ａの先端に
取付けられ、内挿の０リング７とによって、素管１の他
端を、封止して支持するとともに、素管１内へ液圧を導
入するための配管２６が取付けられたシールホルダであ
り、前記シリンダ２，３の均区動によって、素管１を液
圧状態で軸方向へ圧縮することができるようになってい
る。2.3 are cylinders fixed to mounting plates 2b and 3b, respectively; 2a and 3a are spindles of these cylinders 2.3; 4 is attached to the tip of this spindle 2a, and A seal holder 5, which seals and supports one end of the raw tube 1, is attached to the tip of the spindle 3a, and seals and supports the other end of the raw tube 1 with an inserted O-ring 7. At the same time, it is a seal holder to which a piping 26 for introducing hydraulic pressure into the raw pipe 1 is attached, and the raw pipe 1 is compressed in the axial direction under hydraulic pressure by the uniform movement of the cylinders 2 and 3. It is now possible to do so.
８．９は、それぞれ取付板８ｂ、９ｂに固定されたシリ
ンダ、８ａ、９ａは、これらシリンダ８゜９のスピンド
ルであり、これらスピンドル８ａ。8.9 are cylinders fixed to mounting plates 8b and 9b, respectively; 8a and 9a are spindles of these cylinders 8.9; and these spindles 8a.
９ａの先端に、前記分割型支持板１０．１５が固定され
ている。そして、シリンダ８，９駆動によって、分割型
１１，１２．１３と１６．１７．１８を後退位置（第１
図）から一体化位置（第２図）までの間で移動させるこ
とができ、前記一体化位置では、分割型に型しめ荷重を
負荷することができるようになっている。The split support plate 10.15 is fixed to the tip of 9a. Then, by driving the cylinders 8 and 9, the divided molds 11, 12, 13 and 16, 17, and 18 are moved to the retracted position (first
(Fig. 2) to the integrated position (Fig. 2), and in the integrated position, a molding load can be applied to the divided molds.
２１．２２は、分割型用のシリンダ８，９と直交方向に
、取付板２１ｂ、２２ｂに固定されたシリンダ、２１ａ
、２２ａは、これらシリンダ２１゜２２のスピンドルで
あり、スピンドル２１ａ、２２ａの先端に、それぞれ前
記上引張り型支持板２３ｂ、下引張り型支持板２４ｂが
固定されている。21.22 are cylinders 21a fixed to mounting plates 21b and 22b in a direction orthogonal to the cylinders 8 and 9 for the split type;
, 22a are the spindles of these cylinders 21.degree. 22, and the upper tension type support plate 23b and the lower tension type support plate 24b are fixed to the tips of the spindles 21a and 22a, respectively.
そして、シリンダ２１．２２の駆動によって、上。And by driving the cylinders 21, 22, the upper.
下引張り型２３．２４を互いに離間する方向、すなわち
上下方向へ移動させて、前記円形ベローズに半径方向の
引張り荷重を負荷することができるようになっている。By moving the lower tension molds 23, 24 away from each other, ie in the vertical direction, it is possible to apply a radial tensile load to the circular bellows.
このように構成した液圧成形装置を使用して、本発明の
一実施例に係る楕円形ベローズの製造方法を、第１〜６
図を用いて説明する。The method for manufacturing an elliptical bellows according to an embodiment of the present invention is carried out using the hydroforming apparatus configured as described above.
This will be explained using figures.
第４図は、第１図に係る実施例の方法のフローチャート
、第５図は、この方法によって製造された楕円形ベロー
ズの平面図、第６図は、その正面図である。FIG. 4 is a flowchart of the method of the embodiment according to FIG. 1, FIG. 5 is a plan view of an elliptical bellows manufactured by this method, and FIG. 6 is a front view thereof.
第２図において、シリンダ２，３の駆動によるスピンド
ル２ａ、３ａの前進によって、素管１の両端をシールホ
ルダ４，５によって液圧シールを行なう。３組の分割型
１１．１６と１２．１７と１３．１８とを互いに軸方向
に所定距離、たとえば、素管１の外径の約０．４〜０．
６倍だけ離間せしめ、第１図の位置にあった前記各分割
型を、シリンダ８，９の駆動によるスピンドル８ａ、９
ａの前進によって一体化し、第２図に示すように、素管
１の外周部へ装着する。次に、配管２６を介して、液圧
２０を素管１の内側へ負荷することにより、各分割型間
で張出し加工し、山部を成形する。液圧２ｏを一定圧力
に保持した状態で、シリンダ２，３の駆動によるスピン
ドル２ａ、３ａの前進によって、素管１に軸方向荷重を
負荷して圧縮するとともに、分割型が、前記山部を介し
てシールホルダ４，５の動きを伝達して互いに接近し、
分割型全体が重なることによって、山部１ａを有する円
形ベローズ（図示せず）が成形される。液圧２０を除荷
後、シールホルダ４，５を後退させ。In FIG. 2, the cylinders 2 and 3 are driven to move the spindles 2a and 3a forward, so that both ends of the raw tube 1 are hydraulically sealed by the seal holders 4 and 5. The three sets of split molds 11.16, 12.17, and 13.18 are spaced from each other at a predetermined distance in the axial direction, for example, about 0.4 to 0.4 mm of the outer diameter of the raw pipe 1.
The split molds, which were spaced six times apart and located in the position shown in FIG.
They are integrated by advancing the part a, and are attached to the outer periphery of the raw pipe 1, as shown in FIG. Next, by applying hydraulic pressure 20 to the inside of the raw pipe 1 via the piping 26, a bulging process is performed between each split mold to form a peak. With the hydraulic pressure 2o maintained at a constant pressure, the cylinders 2 and 3 drive the spindles 2a and 3a to advance, thereby applying an axial load to the raw tube 1 and compressing it, and the split mold also compresses the mountain portion. transmits the movement of the seal holders 4 and 5 through the seal holders 4 and 5 so that they approach each other;
By overlapping the entire divided molds, a circular bellows (not shown) having a peak portion 1a is formed. After removing the hydraulic pressure 20, the seal holders 4 and 5 are moved back.
油を回収する。Collect the oil.
次に、第１，３図に示すように、上、下引張り型２３．
２４を前記円形ベローズの内側へ通し、この円形ベロー
ズの山部１ａに上、下引張り型２３．２４の波形部２３
ａ、２４ａを挿入する。シリンダ２１．２２を駆動して
スピンドル２１ａ。Next, as shown in FIGS. 1 and 3, upper and lower tension molds 23.
24 into the inside of the circular bellows, and the corrugated portions 23 of the upper and lower tension molds 23 and 24 are attached to the peaks 1a of the circular bellows.
a, insert 24a. Spindle 21a by driving cylinder 21.22.
２２ａを前進させ、その先端部に設けた上、下引張り型
支持板２３ｂ、２４ｂに、上、下引張り型２３．２４を
それぞれ固定する。スピンドル８ａ。22a is advanced, and the upper and lower tension molds 23 and 24 are respectively fixed to the upper and lower tension mold support plates 23b and 24b provided at the tip thereof. Spindle 8a.
９ａが後退し、分割型１１，１２．１３と１６゜１７．
１８が前記円形ベローズから離型した後に。9a retreats and split molds 11, 12.13 and 16°17.
18 after being released from the circular bellows.
スピンドル２１ａ、２２ａが所定量だけを後退して、上
、下引張り型２３．２４によって円形ベローズの半径方
向に引張り荷重を負荷して引張り加工を行い塑性変形を
加えることによって、第５゜６図に示すような、所望の
楕円形ベローズ２６が得られる。The spindles 21a and 22a are moved back by a predetermined amount, and the upper and lower tension molds 23 and 24 apply a tensile load in the radial direction of the circular bellows to perform tensile processing and add plastic deformation. A desired oval bellows 26 as shown in FIG.
具体例−についてのべる。Describe a specific example.
、 外径３８閣、内厚０．４ｍ、長さ８ｏ１１ｍｌのリ
ン青銅の素管１を用い、山部外径の長径が約７０＋ａｍ
（谷部外径４７ｍ）、短径が約４５ｍｍ（谷部外径２２
ｍｍ）、山数４．ピッチが５ｍｍの楕円形ベローズを製
造した具体例を示す。, Using a phosphor bronze tube 1 with an outer diameter of 38 cm, an inner thickness of 0.4 m, and a length of 8 o 11 ml, the major axis of the outer diameter of the peak is about 70 + am.
(Trough outer diameter 47m), short axis approximately 45mm (Trough outer diameter 22m)
mm), number of threads 4. A specific example of manufacturing an elliptical bellows with a pitch of 5 mm will be shown.
張出し加工時の液圧を８５ｋｇｆ／ａｄ、軸方向荷重を
約２５００ｋｇｆ、分割型の型しめ荷重を約３０００ｋ
ｇｆ 、半径方向の引張り荷重を約２０００ｋｇｆ、上
・下引張り型の後退量を４．５ｍｍに設定して、まず谷
径３８＋ｎｍφ、山径６１ａｎφ、ピッチ５１ｍ１の円
形ベローズを成形したのち、この円形ベローズから楕円
形ベローズを成形したところ、所望寸法で形状が良好な
楕円形ベローズ２６を提供することができた。The hydraulic pressure during overhanging is 85kgf/ad, the axial load is approximately 2500kgf, and the molding load for the split mold is approximately 3000k.
gf, the radial tensile load was set to approximately 2000 kgf, and the retraction amount of the upper and lower tension molds was set to 4.5 mm. First, a circular bellows with a root diameter of 38+nmφ, a peak diameter of 61anφ, and a pitch of 51 m1 was formed. When an elliptical bellows was molded from the material, it was possible to provide an elliptical bellows 26 with desired dimensions and a good shape.
以上説明した実施例によれば、次の効果がある。According to the embodiment described above, there are the following effects.
（１）、安価な円形の素管１から、楕円形ベローズ２６
を製造することができるので。(1) From an inexpensive circular raw tube 1 to an oval bellows 26
Because it can be manufactured.
コストの低減がはかれる。Costs can be reduced.
（２）、液圧成形装置に上、下引張り型２３゜２４を取
付けることにより、円形ベローズを成形したと同一装置
によって、楕円形ベローズを製造することができる。(2) By attaching upper and lower tension molds 23 and 24 to a hydraulic forming apparatus, it is possible to manufacture elliptical bellows using the same apparatus that forms circular bellows.
（３）、引張り変形が主体となる加工法であるので、加
工時に座屈、しわ等が発生することはない。(3) Since the processing method mainly involves tensile deformation, buckling, wrinkles, etc. do not occur during processing.
（４）、成形品内側の流路面積が小さくなることはない
ので、流路の変化がない。(4) Since the flow path area inside the molded product does not become smaller, there is no change in the flow path.
［発明の効果］
以上詳細に説明したように本発明によれば、安価な円形
の素管を用い、しかも成形品の流路面積が小さくならな
い、楕円形ベローズの製造方法を提供することができる
。[Effects of the Invention] As explained in detail above, according to the present invention, it is possible to provide a method for manufacturing an elliptical bellows using an inexpensive circular blank tube and in which the flow passage area of the molded product does not become small. .
第１図は、本発明の一実施例に係る楕円形ベローズの製
造方法の実施例に使用される液圧成形装置の正面図（た
だし、引張り型による楕円形ベローズの成形時）、第２
図は、この第１図の■−■矢視平面断面図（ただし１分
割型による円形ベローズの成形時）、第３図は、第１図
の■−■矢視側断面図、第４図は、第１図に係る実施例
の方法のフローチャート、第５図は、この方法によって
製造された楕円形ベローズの平面図、第６図は、その正
面図である。
１・・・素管、１１，１２，１３，１６，１７，１８・
・・分割型、２０・・・液圧、２３・・・下引張り型、
２３ａ・・・波形部、２４・・・下引張り型、２４ａ・
・・波形部、２６・・・楕円形ベローズ、２７・・・成
形型、２７ａ・・・成形部、２７ｂ・・・基部。FIG. 1 is a front view of a hydraulic forming apparatus used in an embodiment of a method for manufacturing an elliptical bellows according to an embodiment of the present invention (when an elliptical bellows is formed by a tension mold);
The figure is a cross-sectional plan view taken along the line ■-■ of this figure (however, when a circular bellows is formed using a one-piece mold), Figure 3 is a side cross-sectional view taken along the line ■-■ of figure 1, and Figure 4 1 is a flowchart of the method of the embodiment according to FIG. 1, FIG. 5 is a plan view of an elliptical bellows manufactured by this method, and FIG. 6 is a front view thereof. 1...Main pipe, 11, 12, 13, 16, 17, 18.
...Split type, 20...Hydraulic pressure, 23...Down tension type,
23a... Waveform part, 24... Lower tension type, 24a.
... Corrugated portion, 26... Oval bellows, 27... Molding die, 27a... Molding portion, 27b... Base.
Claims (2)
楕円形ベローズを製造する方法において、内径面で円形
を形成する複数組の、２分割した分割型からなる成形型
を使用し、素管の外径側へ前記分割型を互いに所定距離
だけ離間して装着し、前記素管内部へ液圧を負荷して張
出し加工するとともに、該素管を軸方向へ押圧すること
により円形ベローズを成形したのち、この円形ベローズ
内部から液圧を排除するとともに、前記分割型を外し、
この円形ベローズ内へ、引張り型を、前記円形ベローズ
の山部，谷部と該引張り型とが嵌め合いになるようにし
て互いに対向して１個ずつ挿入し、両引張り型を互いに
離間する方向へ所定量だけ引張って、前記円形ベローズ
をその半径方向へ引伸ばすことにより、楕円形ベローズ
を成形することを特徴とする楕円形ベローズの製造方法
。1. In a method for manufacturing an elliptical bellows having peaks and valleys at a predetermined pitch from a circular blank tube, a mold consisting of two or more split molds each forming a circular shape on the inner diameter surface is used. The split molds are installed on the outer diameter side of the pipe at a predetermined distance from each other, and hydraulic pressure is applied to the inside of the raw pipe to make it stretch, and the raw pipe is pressed in the axial direction to form a circular bellows. After molding, remove the hydraulic pressure from inside this circular bellows and remove the split mold,
The tension molds are inserted one by one into this circular bellows, facing each other so that the peaks and valleys of the circular bellows and the tension mold fit into each other, and the direction in which both tension molds are separated from each other. 1. A method for manufacturing an elliptical bellows, characterized in that an elliptical bellows is formed by stretching the circular bellows in its radial direction by pulling it by a predetermined amount.
の形状が、成形すべき円形ベローズの谷部の形状と等し
い成形部と、この成形部と一体で、その厚さが前記成形
部の厚さよりも厚い基部とを有する２分割の、複数組の
分割型からなり、これら分割型を互いに重ねたとき、前
記各成形部の厚さ中心間距離が前記円形ベローズのピッ
チと等しくなるような成形型にし、引張り型を、成形す
べき楕円形ベローズの長径側端部と同一外形を有し、且
つ前記円形ベローズの山部，谷部へ嵌め合わせることが
できる波形部を形成してなる引張型にしたことを特徴と
する特許請求の範囲第１項記載の楕円形ベローズの製造
方法。2. The forming die has a forming part whose inner diameter is approximately equal to the outer diameter of the blank pipe and whose inner diameter surface is equal to the shape of the valley of the circular bellows to be formed, and a forming part that is integral with this forming part and whose thickness is the same as that of the forming part. It consists of a plurality of two sets of split molds each having a base thicker than the thickness of the molded part, and when these split molds are stacked on top of each other, the distance between the thickness centers of each of the molded parts is equal to the pitch of the circular bellows. A mold is made, and a tension mold is formed with a corrugated portion that has the same outer shape as the longer diameter end of the oval bellows to be molded and that can fit into the peaks and valleys of the circular bellows. A method for manufacturing an elliptical bellows according to claim 1, characterized in that the bellows is of a tension type.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9101587A JPH07209B2 (en) | 1987-04-15 | 1987-04-15 | Oval shaped bellows manufacturing method |
| US07/051,697 US4827747A (en) | 1986-05-21 | 1987-05-20 | Method for producing a bellows with oval cross section and apparatus for carrying out the method |
| DE87107412T DE3788305T2 (en) | 1986-05-21 | 1987-05-21 | Method for producing bellows with an elliptical, egg-shaped, non-circular ring-shaped or rounded polygonal cross-sectional shape formed from two identical semicircles connected with parallel straight lines. |
| EP87107412A EP0250838B1 (en) | 1986-05-21 | 1987-05-21 | Method for producing a bellows with a cross section of elliptical, egg-shaped, shaped as two equal semicircles connected by two parallel straight lines, non circular ring or polygonal roundes form. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9101587A JPH07209B2 (en) | 1987-04-15 | 1987-04-15 | Oval shaped bellows manufacturing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63256227A true JPS63256227A (en) | 1988-10-24 |
| JPH07209B2 JPH07209B2 (en) | 1995-01-11 |
Family
ID=14014728
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9101587A Expired - Lifetime JPH07209B2 (en) | 1986-05-21 | 1987-04-15 | Oval shaped bellows manufacturing method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07209B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105710181A (en) * | 2016-02-03 | 2016-06-29 | 中国科学院金属研究所 | Forming method of large-deformation small-fillet thin-wall hollow component |
| CN107856286A (en) * | 2017-10-30 | 2018-03-30 | 平湖市万顺达机械有限公司 | A kind of stretching-machine |
| WO2019174209A1 (en) * | 2018-03-14 | 2019-09-19 | 佛山市南海兴迪机械制造有限公司 | High-pressure liquid-filled forming mould for bellows |
-
1987
- 1987-04-15 JP JP9101587A patent/JPH07209B2/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105710181A (en) * | 2016-02-03 | 2016-06-29 | 中国科学院金属研究所 | Forming method of large-deformation small-fillet thin-wall hollow component |
| CN107856286A (en) * | 2017-10-30 | 2018-03-30 | 平湖市万顺达机械有限公司 | A kind of stretching-machine |
| WO2019174209A1 (en) * | 2018-03-14 | 2019-09-19 | 佛山市南海兴迪机械制造有限公司 | High-pressure liquid-filled forming mould for bellows |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07209B2 (en) | 1995-01-11 |
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