JP3066366B2 - Method of manufacturing radial cross-section tube - Google Patents
Method of manufacturing radial cross-section tubeInfo
- Publication number
- JP3066366B2 JP3066366B2 JP10363627A JP36362798A JP3066366B2 JP 3066366 B2 JP3066366 B2 JP 3066366B2 JP 10363627 A JP10363627 A JP 10363627A JP 36362798 A JP36362798 A JP 36362798A JP 3066366 B2 JP3066366 B2 JP 3066366B2
- Authority
- JP
- Japan
- Prior art keywords
- tube
- section
- pressing
- cross
- pressing plate
- 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
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D15/00—Corrugating tubes
- B21D15/02—Corrugating tubes longitudinally
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
- B21C37/15—Making tubes of special shape; Making tube fittings
- B21C37/16—Making tubes with varying diameter in longitudinal direction
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
- B21C37/15—Making tubes of special shape; Making tube fittings
- B21C37/20—Making helical or similar guides in or on tubes without removing material, e.g. by drawing same over mandrels, by pushing same through dies ; Making tubes with angled walls, ribbed tubes and tubes with decorated walls
- B21C37/202—Making helical or similar guides in or on tubes without removing material, e.g. by drawing same over mandrels, by pushing same through dies ; Making tubes with angled walls, ribbed tubes and tubes with decorated walls with guides parallel to the tube axis
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Exhaust Silencers (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は放射状断面管の製造
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 radial section tube.
【０００２】[0002]
【従来の技術】一般に、管壁を周方向にひだ状に形成し
た放射状断面管において、そのひだ部の突出長を長くし
たい場合がある。例えば、一般に、熱交換器の伝熱管表
面に放射状のひだ部を管の長手方向に延設して熱交換が
行われているが、この熱交換効率を向上させるために
は、前記のひだ部の山高さを高く、かつひだ部の谷深さ
を低くすることが要求される。2. Description of the Related Art Generally, in a radial cross-section tube having a tube wall formed in a pleated shape in the circumferential direction, it is sometimes desired to increase the protruding length of the pleated portion. For example, in general, heat exchange is performed by extending radial folds on the surface of a heat transfer tube of a heat exchanger in the longitudinal direction of the tube. In order to improve the heat exchange efficiency, the folds described above are used. It is required to increase the height of the hills and reduce the depth of the valleys in the folds.
【０００３】前記のようなひだ部を有する放射状断面管
の製造方法として、従来図１７に示すように、湾曲断面
形状の山部１０１と谷部１０２を管周方向に交互に形成
するとともに、谷部１０２の外面に微細溝１０２ａを形
成した伝熱管１０３を分割ダイスにより引き抜き加工で
製造する方法が例えば特開平７−２４５２２号公報に開
示されている。As a method of manufacturing a radial cross-section tube having the above-mentioned folds, as shown in FIG. 17, conventionally, as shown in FIG. 17, peak portions 101 and valley portions 102 having a curved cross-sectional shape are alternately formed in the circumferential direction of the tube. For example, Japanese Patent Application Laid-Open No. Hei 7-24522 discloses a method of manufacturing the heat transfer tube 103 having the fine groove 102a formed on the outer surface of the portion 102 by drawing using a split die.
【０００４】また、図１８に示すように、予め山部と谷
部を形成した波板１０４を管１０５の外周に巻き付けた
後、溶接固定して放熱部を形成する方法が例えば実開平
２−１４０１７６号公報に開示されている。As shown in FIG. 18, a method of forming a heat radiating portion by winding a corrugated plate 104 in which peaks and valleys have been formed in advance around the outer periphery of a tube 105 and fixing by welding is disclosed in, for example, No. 140176 discloses this.
【０００５】[0005]
【発明が解決しようとする課題】前記図１７に示す従来
の製造方法においては、管周方向に配置された複数個の
ダイスや管を管軸方向に駆動するベルトフィーダ等を必
要として設備が大型、複雑化するとともに、短い伝熱管
やひだ部の軸方向断面形状が変化するものにおいては対
応できない問題がある。The conventional manufacturing method shown in FIG. 17 requires a large number of dies and a belt feeder for driving the pipes in the pipe axis direction in the pipe circumferential direction. However, there is a problem that it is not possible to cope with complicated heat exchangers and those in which the axial cross-sectional shape of the short heat transfer tubes or the folds changes.
【０００６】また、前記図１８に示す製造方法において
は、波板１０４を管１０５に巻き付けることからその波
板が比較的薄いものしか対応できず、更に、波板１０４
の波成形とは別に波板１０４を管１０５に溶接する作業
が必要になり、量産性に適さない問題がある。Further, in the manufacturing method shown in FIG. 18, since the corrugated sheet 104 is wound around the pipe 105, only a relatively thin corrugated sheet can be used.
In addition to the above-mentioned wave forming, an operation of welding the corrugated plate 104 to the pipe 105 is required, which is not suitable for mass production.
【０００７】そこで本発明は、任意の断面形状のひだ部
を簡易な設備で低コストにより製造できる放射状断面管
の製造方法を提供することを目的とするものである。SUMMARY OF THE INVENTION It is an object of the present invention to provide a method of manufacturing a radial cross-section tube which can manufacture a pleated portion having an arbitrary cross-sectional shape with simple equipment at low cost.
【０００８】[0008]
【課題を解決するための手段】前記の課題を解決するた
めに、請求項１記載の第１の発明は、管素材の軸方向の
ひだ部形成区間に亙って、管素材の外周に位置して第１
の押板と第２の押板を周方向に交互に同数配設し、第１
の押板を深く求心方向へ押し込み駆動するとともに第２
の押板も浅く求心方向へ押し込み駆動して放射状のひだ
部を形成することを特徴とするものである。In order to solve the above-mentioned problems, a first aspect of the present invention is directed to a first aspect of the present invention, wherein a position is located on an outer periphery of a tube material over an axial fold forming section of the tube material. First
The same number of pressing plates and the second pressing plates are alternately arranged in the circumferential direction .
Second with the Write-driven press of the push plate deeply in the centripetal direction
The push plate is also shallow pressed in the centripetal direction Write-driven to is characterized in forming a radial corrugation.
【０００９】請求項２記載の第２の発明は、前記第１の
発明において、前記第１の押板と第２の押板は放射状に
等間隔に配置され、第１の押板の押圧面よりも第２の押
板の押圧面が周方向に長く形成され、前記両押板の押し
込み駆動を同時に行うことを特徴とするものである。According to a second aspect of the present invention, in the first aspect, the first pressing plate and the second pressing plate are radially arranged at equal intervals, and a pressing surface of the first pressing plate is provided. The pressing surface of the second pressing plate is formed longer in the circumferential direction than that of the second pressing plate, and the driving of the pressing plates is performed simultaneously.
【００１０】そして、請求項３記載の第３の発明は、前
記第１又は第２の発明において、前記管素材のひだ部形
成区間に亙って、ひだ部の横断面の最終断面形状と略一
致した横断面の内挿型を管素材内に挿入して、前記第１
の押板と第２の押板を押し込み駆動することを特徴とす
るものである。In a third aspect of the present invention, in the first or second aspect, the final cross-sectional shape of the cross section of the fold is substantially the same as that of the fold of the tube material over the formation section of the fold. The insertion mold having the same cross section is inserted into the tube material,
It is characterized in that the push plate and Write-drive pushes the second push plate.
【００１１】[0011]
【発明の実施の形態】図１乃至図１６に示す実施例に基
いて本発明の実施の形態について説明する。図１乃至図
７は第１実施例を示す。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described based on the embodiment shown in FIGS. 1 to 7 show a first embodiment.
【００１２】図１（ａ）は管素材の縦断面、図１（ｂ）
は管素材からひだ部を押し込み成形した図、図１（ｃ）
は図１（ｂ）のＡ−Ａ線断面図である。図１（ａ）に示
す管素材１は直径Ｄ1 を有する直管２（鎖線管）の両端
部を縮径してなり、その管素材部３の周長は、後述する
ひだ部１２からなる放熱部の周長にほぼ相当する長さに
設定されている。そして、中央の管素材部３の両端部に
設けた縮径部は、第１縮径部４，４ａ、該第１縮径部
４，４ａから拡径する第１テーパ部５，５ａ、第１テー
パ部５，５ａに続く第２縮径部６，６ａ、該第２縮径部
６，６ａから拡径する第２テーパ部７，７ａをこの順序
で管外端側から管中央側に向って連続して形成されてい
る。FIG. 1A is a longitudinal section of a tube material, and FIG.
Fig. 1 (c) is a diagram in which pleats are pressed and formed from a tube material.
FIG. 2 is a sectional view taken along line AA of FIG. The tube blank 1 shown in FIG. 1A is formed by reducing the diameter of both ends of a straight tube 2 (a chain line tube) having a diameter D 1, and the circumferential length of the tube blank 3 is composed of a fold 12 described later. It is set to a length substantially corresponding to the circumference of the heat radiating portion. The reduced diameter portions provided at both ends of the central tube material portion 3 include first reduced diameter portions 4 and 4a, first tapered portions 5 and 5a that increase in diameter from the first reduced diameter portions 4 and 4a, and The second tapered portions 6 and 6a following the 1 tapered portions 5 and 5a, and the second tapered portions 7 and 7a that expand from the second reduced diameter portions 6 and 6a are arranged in this order from the outer end of the pipe to the center of the pipe. It is formed continuously toward the surface.
【００１３】前記第１縮径部４，４ａの径は、これに接
続される管、例えば上流側管及び下流側管と連結できる
径に設定され、第２縮径部６，６ａの外径は、後述する
方法により形成されるひだ部１２の外径と略同径に設定
されている。The diameter of the first reduced diameter portions 4 and 4a is set to a diameter that can be connected to a pipe connected thereto, for example, an upstream pipe and a downstream pipe, and the outer diameter of the second reduced diameter portions 6 and 6a. Is set to be substantially the same as the outer diameter of the fold 12 formed by a method described later.
【００１４】前記の管素材１にひだ部１２を形成する加
工機は図１（ｂ）（ｃ）に示すように、配置される管素
材１の管中心を中心とする放射状に第１の押板８を複
数、周方向に等間隔に配置し、更に、管素材１の管中心
を中心とする放射状に第２の押板９を複数、前記第１の
押板８，８間に位置して周方向に等間隔に配置し、すな
わち、第１の押板８と第２の押板９を周方向に交互に配
置している。[0014] machine, as shown in FIG. 1 (b) (c), a first radially around the tube material 1 of the tube in mind arranged to form a fold portion 12 to the tube material 1 a plurality of push plate 8, arranged at equal intervals in the circumferential direction, further, hearts in the tubes of the tube material 1
A plurality of second pressing plates 9 are radially arranged around the first pressing plate 8, and are disposed at equal intervals in the circumferential direction between the first pressing plates 8, 8, that is, the first pressing plate 8 and the second pressing plate The push plates 9 are alternately arranged in the circumferential direction.
【００１５】更に前記第１の押板８は薄板でかつ前記管
素材１の軸線に沿った長尺に形成され、その軸方向長は
前記管素材１のひだ部形成区間、すなわち、前記管素材
１における第２縮径部６，６ａ間の長さと略同長に形成
されている。更に該第１の押板８の先端の押圧面８ａ
は、その管素材１の軸方向における中央部８ｂを管素材
１の軸線と平行する面にして形成され、該中央部８ｂの
両側が管端方向が開くテーパ面８ｃ，８ｃに形成されて
いる。更に、前記先端の押圧面８ａは可能な限り薄く、
すなわち管素材１の変形時に座屈が生じない程度に薄く
形成され、かつその押圧面８ａは外側に中心をもつ曲面
に形成されている。Further, the first push plate 8 is a thin plate and is formed to be long along the axis of the tube blank 1, and its axial length is a fold forming section of the tube blank 1, ie, the tube blank. 1 is formed to have substantially the same length as the length between the second reduced diameter portions 6 and 6a. Further, the pressing surface 8a at the tip of the first pressing plate 8
Is formed so that the central portion 8b in the axial direction of the tube material 1 is a surface parallel to the axis of the tube material 1, and both sides of the central portion 8b are formed as tapered surfaces 8c, 8c in which the tube end direction opens. . Further, the pressing surface 8a at the tip is as thin as possible,
That is, the tube blank 1 is formed so thin that buckling does not occur when the tube blank 1 is deformed, and the pressing surface 8a is formed into a curved surface having a center on the outside.
【００１６】前記第２の押板９は、前記第１の押板８の
板厚より厚い板厚でかつ前記管素材１の軸線に沿った長
尺に形成され、その軸方向長は前記管素材１のひだ形成
区間、すなわち前記管素材１における第２縮径部６，６
ａ間の長さと略同長に形成されている。更に、該第２の
押板９の先端の押圧面９ａは管素材１の軸線と平行する
面に形成され、かつ管素材１の周方向に対しては、成形
されるひだ部１２における山部の外面に沿った面、図の
実施例では内側に中心をもつ円弧面に形成されて、その
押圧面９ａが前記第１の押板８の押圧面８ａよりも周方
向に長く形成されている。The second push plate 9 is formed to have a thickness greater than the thickness of the first push plate 8 and to be long along the axis of the tube blank 1, and its axial length is equal to the length of the tube. The fold forming section of the raw material 1, that is, the second reduced diameter portion 6, 6 in the pipe raw material 1.
It is formed to have substantially the same length as the length between "a". Further, the pressing surface 9 a at the tip of the second pressing plate 9 is formed on a surface parallel to the axis of the tube material 1, and the crest 12 in the formed fold 12 is formed in the circumferential direction of the tube material 1. Is formed as a surface along the outer surface, in the illustrated embodiment, an arc surface centered on the inside, and the pressing surface 9a is formed longer in the circumferential direction than the pressing surface 8a of the first pressing plate 8. .
【００１７】前記第１の押板８と第２の押板９には夫々
図示しない周知の進退駆動装置が設けられ、該両押板
８，９を夫々求心方向及びその逆方向へ進退移動するよ
うになっている。The first push plate 8 and the second push plate 9 are respectively provided with well-known advance / retreat driving devices (not shown), and move the push plates 8 and 9 in the centripetal direction and in the opposite direction, respectively. It has become.
【００１８】次に、放射状断面管の製造方法について説
明する。先ず、各押板８，９が管素材１の外径より外側
へ退避している状態において前記の予め両端部を縮径し
た管素材１を各押板８，９の対向中心部にセットし、適
宜手段で保持する。Next, a method of manufacturing a radial cross-section tube will be described. First, in a state where the push plates 8 and 9 are retracted outside the outer diameter of the tube material 1, the tube material 1 whose both ends are reduced in advance is set at the opposing central portions of the push plates 8 and 9. , By appropriate means.
【００１９】次に、各第１の押板８を求心方向へ、管素
材１の略中心点まで深く押し込むと同時に各第２の押板
９を求心方向へ浅く押し込む。この第１の押板８の押し
込みにより、第１の押板８が位置する部分の管素材１に
おける管素材部３は、図１（ｃ）に示すように求心方向
へ深く押し曲げられ、その押し先端部に谷部１０が形成
される。また、第２の押板９の押し込みにより、前記第
１の押板８，８間の管素材部３は図１（ｃ）に示すよう
に押さえられて円弧状の山部１１に形成され、管素材部
３の横断面形状は三角形に近い花弁型となり、図１
（ｃ）のように第１の押板８と第２の押板９を夫々３枚
交互に配置した場合には、３個の花弁型のひだ部１２か
らなる流路１４が形成される。Next, each first push plate 8 is pushed deeply in the centripetal direction up to a substantially central point of the tube blank 1, and at the same time each second push plate 9 is pushed shallowly in the centripetal direction. Due to the pushing of the first push plate 8, the tube blank portion 3 of the tube blank 1 in the portion where the first push plate 8 is located is deeply bent in the centripetal direction as shown in FIG. A valley 10 is formed at the pushing tip. When the second push plate 9 is pushed in, the tube blank portion 3 between the first push plates 8 is pressed down as shown in FIG. The cross-sectional shape of the tube material part 3 is a petal shape close to a triangle, and FIG.
In the case where three first push plates 8 and second push plates 9 are alternately arranged as shown in (c), a flow path 14 including three petal-shaped folds 12 is formed.
【００２０】このように、第２の押板９を設ける理由
は、第１の押板８のみを求心方向に押し込むと、管素材
部３の変形抵抗により断面が幅の狭い断面になり流路断
面積を確保することができなくなるが、前記第１の押板
８と同時に第２の押板９を押し込むことにより、第１の
押板８によって管素材が求心方向へ多く流れる（肉流
れ）のを、第２の押板９で外面を浅く押し込んでアシス
トすることにより、全体の肉流れがスムースに無理なく
辻つまが合い、座屈や異形化を伴わずに正確に所望形状
のひだ部１２が得られる。As described above, the reason why the second push plate 9 is provided is that when only the first push plate 8 is pushed in the centripetal direction, the cross-section becomes narrow due to the deformation resistance of the tube material portion 3 and the flow path becomes smaller. Although the cross-sectional area cannot be secured, by pushing the second push plate 9 simultaneously with the first push plate 8, the first push plate 8 allows a large amount of tube material to flow in the centripetal direction (meat flow). By pushing the outer surface shallowly with the second pressing plate 9 and assisting, the entire meat flow smoothly and smoothly fits in the tsuji, and the folds of the desired shape are accurately formed without buckling or deformation. 12 is obtained.
【００２１】そして、前記のような押し込みにより、深
い谷部１０を有して高低差の大きい花弁型のひだ部１２
が形成され、管の表面積が広くなる。前記のような方法
により製造された放射状断面管１３を図２乃至図７に示
す。該放射状断面管１３を伝熱管として使用し、その一
方の第１縮径部４に例えば内燃機関の上流側排気管を接
続し、他方の第１縮径部４ａに下流側排気管を接続し
て、排気ガスを一方の第１縮径部４から流入させると、
その排気ガスは前記各花弁型の流路１４を流通し他方の
第１縮径部４ａから流出する。このとき、前記第１の押
板８のテーパ面８ｃにより成形されたテーパ部１５によ
り排気ガスがスムースに各流路１４に分流される。更に
この流通時において、広い面積のひだ部１２により熱交
換が高効率に行われる。なお、前記の第１の押板８や第
２の押板９の型面に微細溝を形成して、成形されたひだ
部表面に、前記図１７に示すような微細溝を形成しても
よい。そうすると、伝熱管とした場合に一層放熱効率が
向上する。By the pushing as described above, the petal-shaped fold 12 having a deep valley 10 and a large difference in height is provided.
Are formed, and the surface area of the tube is increased. FIGS. 2 to 7 show the radial cross-section tube 13 manufactured by the above method. The radial cross-section tube 13 is used as a heat transfer tube. One of the first reduced diameter portions 4 is connected to, for example, an upstream exhaust pipe of an internal combustion engine, and the other of the first reduced diameter portion 4a is connected to a downstream exhaust pipe. When the exhaust gas flows from one of the first reduced diameter portions 4,
The exhaust gas flows through the petal-shaped flow paths 14 and flows out of the other first reduced diameter portion 4a. At this time, the exhaust gas is smoothly diverted to each flow path 14 by the tapered portion 15 formed by the tapered surface 8c of the first pressing plate 8. Further, during this circulation, heat exchange is performed with high efficiency by the folds 12 having a large area. It is to be noted that a fine groove may be formed on the mold surface of the first pressing plate 8 or the second pressing plate 9 to form a fine groove as shown in FIG. Good. Then, in the case of a heat transfer tube, the heat radiation efficiency is further improved.
【００２２】図８は第２実施例を示す。本第２実施例
は、前記管素材１のひだ形成区間に亙って、ひだ部の横
断面の最終断面形状と一致した横断面の内挿型２０を挿
入して製造する例である。FIG. 8 shows a second embodiment. The second embodiment is an example of manufacturing by inserting an insertion mold 20 having a cross section corresponding to the final cross section of the cross section of the fold over the fold formation section of the tube blank 1.
【００２３】前記内挿型２０は前記ひだ部１２の山部１
１を成形する凸部２１と谷部１０を成形する凹部２２と
で形成され、ひだ部製造後に該内挿型２０を引き抜きで
きるように、凸部２１と凹部２２が軸方向全長に亙って
形成されている。尚、該内挿型２０には、図示しない
が、これを挿入、引き抜き移動する駆動手段が設けられ
ている。また、本第２実施例においては、管素材１は前
記第１実施例のような第１縮径部４，４ａと第１テーパ
部５，５ａと第２縮径部６，６ａと第２テーパ部７，７
ａは形成されていない。その他の構造は前記第１実施例
と同様であるため同一部分には同一符号を付してその説
明は省略する。The interpolating mold 20 is provided with the ridges 1 of the pleats 12.
1 and a concave portion 22 for forming the valley portion 10. The convex portion 21 and the concave portion 22 extend over the entire length in the axial direction so that the insertion mold 20 can be pulled out after manufacturing the fold portion. Is formed. Although not shown, the insertion mold 20 is provided with a driving means for inserting and extracting the same. In the second embodiment, the tube blank 1 is made up of the first reduced diameter portions 4, 4a, the first tapered portions 5, 5a, the second reduced diameter portions 6, 6a, and the second reduced diameter portions 4 and 4a as in the first embodiment. Tapered part 7,7
a is not formed. Since other structures are the same as those of the first embodiment, the same portions are denoted by the same reference numerals and description thereof will be omitted.
【００２４】本実施例においては、前記の管素材１を前
記と同様に各押板８，９の対向中心部にセットし、ま
た、該管素材１内に内挿型２０を所定位置に挿入し、次
で、前記第１実施例と同様に各押板８，９を同時に押し
込む。これにより、前記第１実施例と同様に花弁型のひ
だ部１２が形成されるが、本第２実施例のように内挿型
２０を設けることにより、ひだ部１２を高精度に成形で
きる。In this embodiment, the tube material 1 is set at the center of the push plates 8 and 9 facing each other in the same manner as described above, and the insertion mold 20 is inserted into the tube material 1 at a predetermined position. Then, as in the first embodiment, the push plates 8 and 9 are simultaneously pushed in. As a result, the petal-shaped folds 12 are formed in the same manner as in the first embodiment. However, by providing the interpolation mold 20 as in the second embodiment, the folds 12 can be formed with high precision.
【００２５】そして、成形後、両押板８，９を外方へ退
避させ、内挿型２０を引き抜き、成形された放射状断面
管を取り出す。図９乃至図１６は第３実施例を示す。After the forming, the pressing plates 8 and 9 are retracted outward, the insert die 20 is pulled out, and the formed radial cross-section tube is taken out. 9 to 16 show a third embodiment.
【００２６】本実施例は触媒担体を下流側に収納した管
の上流側を伝熱管にする場合の例で、上流側管３０に前
記実施例と同様な方法でひだ部１２を形成し、該上流側
管３０の下流に一連に形成した下流側管３１内に触媒担
体３２を収納している。This embodiment is an example in which the heat transfer tube is used on the upstream side of the tube in which the catalyst carrier is accommodated on the downstream side, and the pleated portion 12 is formed in the upstream tube 30 in the same manner as in the above embodiment. A catalyst carrier 32 is housed in a downstream tube 31 formed in a series downstream of the upstream tube 30.
【００２７】本実施例においては、排気ガスを冷却して
触媒に流通させる場合に、触媒担体を収納した管の上流
側に熱交換に優れた伝熱管を一体成形する場合に有効で
ある。The present embodiment is effective when the exhaust gas is cooled and circulated through the catalyst, and a heat transfer tube excellent in heat exchange is integrally formed on the upstream side of the tube containing the catalyst carrier.
【００２８】なお、前記各実施例における第１の押板８
と第２の押板９を増加することによりひだ部１２の数を
増加することができる。また、本発明は内燃機関の排気
系に限らず、その他の伝熱管ばかりか、流体配管や構造
管など全ての管の製造に適用できるものである。The first push plate 8 in each of the above embodiments is used.
The number of the folds 12 can be increased by increasing the number of the folds 12 and the second pressing plate 9. Further, the present invention is not limited to the exhaust system of an internal combustion engine, but can be applied to the manufacture of not only other heat transfer tubes but also all tubes such as fluid piping and structural tubes.
【００２９】[0029]
【発明の効果】以上のようであるから、請求項１記載の
発明によれば、第１の押板と第２の押板を周知の押し込
み手段により押し込んで管素材を変形加工するのみで、
放射状で、山部と谷部の高低差の大きいひだ部を形成で
きるので、前記従来の引き抜き加工に比べて設備の小型
化、簡素化、低コスト化を図ることができ、かつ、その
管軸方向に長いひだ部でも短いひだ部でも押板の長さに
より必要範囲に所望に形成できる。更に、管軸方向に高
さが除変するひだ部も容易に形成できる。更に比較的厚
い板厚を有するひだ部も容易に形成できる。更に、前記
従来のような溶接工程も必要としないので量産性に適す
る。As described above, according to the first aspect of the present invention, the first pressing plate and the second pressing plate are pressed by well-known pressing means to deform the tube material.
Since radially, folds having a large difference in height between peaks and valleys can be formed, it is possible to reduce the size, simplification, and cost of the equipment as compared with the conventional drawing process, and furthermore, to reduce the pipe axis. Either a long fold or a short fold in the direction can be formed in a desired range depending on the length of the pressing plate. Further, a fold portion whose height varies in the tube axis direction can be easily formed. Further, a fold having a relatively large plate thickness can be easily formed. Further, since the conventional welding process is not required, the method is suitable for mass production.
【００３０】請求項２記載の発明によれば、前記第１の
押板が深く押し込まれることにより管素材が求心方向へ
多く流れるのを、第２の押板で外面を浅く押し込むこと
により、管素材全体の肉流動がスムースに無理なく辻つ
まが合うように行われ、座屈や異形化を伴わずに正確な
所望形状のひだ部を形成できる。According to the second aspect of the present invention, the flow of a large amount of tube material in the centripetal direction due to the first push plate being deeply pushed is prevented by the second push plate pushing the outer surface shallowly. The flow of the meat through the entire material is smoothly and smoothly performed so that the toe-and-pinch fits smoothly, and a fold having a desired shape can be formed accurately without buckling or deformation.
【００３１】請求項３記載の発明によれば、ひだ部が外
型である押板と内型である内挿型で挟むように成形され
るため、ひだ部を更に高精度に成形できる。According to the third aspect of the present invention, since the folds are formed so as to be sandwiched between the outer press plate and the inner dies, the folds can be formed with higher precision.
【図１】本発明の第１実施例を示すもので、（ａ）は管
素材の縦断面図、（ｂ）は製造状態を示す縦断面図、
（ｃ）は（ｂ）のＡ−Ａ線断面図。FIGS. 1A and 1B show a first embodiment of the present invention, in which FIG. 1A is a longitudinal sectional view of a tube material, FIG.
(C) is a sectional view taken along line AA of (b).
【図２】図１により製造された放射状断面管の正面図。FIG. 2 is a front view of a radial cross-section tube manufactured according to FIG. 1;
【図３】図２の平面図。FIG. 3 is a plan view of FIG. 2;
【図４】図２の底面図。FIG. 4 is a bottom view of FIG. 2;
【図５】図２の左側面図。FIG. 5 is a left side view of FIG. 2;
【図６】図２の縦断面図。FIG. 6 is a longitudinal sectional view of FIG. 2;
【図７】図６におけるＢ−Ｂ線断面図。FIG. 7 is a sectional view taken along line BB in FIG. 6;
【図８】本発明の第２実施例を示すもので、（ａ）は縦
断面図、（ｂ）は（ａ）におけるＣ−Ｃ線断面図。8A and 8B show a second embodiment of the present invention, wherein FIG. 8A is a longitudinal sectional view, and FIG. 8B is a sectional view taken along line CC in FIG.
【図９】図８により製造された放射状断面管の正面図。FIG. 9 is a front view of a radial cross-section tube manufactured according to FIG. 8;
【図１０】図９の平面図。FIG. 10 is a plan view of FIG. 9;
【図１１】図９の底面図。FIG. 11 is a bottom view of FIG. 9;
【図１２】図９の左側面図。FIG. 12 is a left side view of FIG. 9;
【図１３】図９の右側面図。FIG. 13 is a right side view of FIG. 9;
【図１４】図９の縦断面図。FIG. 14 is a longitudinal sectional view of FIG. 9;
【図１５】図１４におけるＥ−Ｅ線断面図。FIG. 15 is a sectional view taken along line EE in FIG. 14;
【図１６】図１４におけるＦ−Ｆ線断面図。FIG. 16 is a sectional view taken along line FF in FIG. 14;
【図１７】従来の引き抜き加工により製造された伝熱管
を示す横断面図。FIG. 17 is a cross-sectional view showing a heat transfer tube manufactured by a conventional drawing process.
【図１８】従来の波板による伝熱管の斜視図。FIG. 18 is a perspective view of a conventional heat transfer tube using a corrugated sheet.
１ 管素材 ８ 第１の押板 ９ 第２の押板 １２ ひだ部 Reference Signs List 1 tube material 8 first push plate 9 second push plate 12 pleat
Claims (3)
て、管素材の外周に位置して第１の押板と第２の押板を
周方向に交互に同数配設し、第１の押板を深く求心方向
へ押し込み駆動するとともに第２の押板も浅く求心方向
へ押し込み駆動して放射状のひだ部を形成することを特
徴とする放射状断面管の製造方法。1. A first pressing plate and a second pressing plate which are located on the outer periphery of a tube material over an area where a fold portion is formed in the axial direction of the tube material.
Alternately with the same number arranged in the circumferential direction, forming a radial corrugation and Write-driven push second push plate is also shallow in the centripetal direction as well as Write-driven push deeper into centripetal direction of the first push plate A method for manufacturing a radial cross-section tube, characterized in that:
等間隔に配置され、第１の押板の押圧面よりも第２の押
板の押圧面が周方向に長く形成され、前記両押板の押し
込み駆動を同時に行うことを特徴とする請求項１記載の
放射状断面管の製造方法。2. The first pressing plate and the second pressing plate are radially arranged at equal intervals, and the pressing surface of the second pressing plate is formed longer in the circumferential direction than the pressing surface of the first pressing plate. 2. The method for manufacturing a radial cross-section tube according to claim 1, wherein the pressing operation of both the pressing plates is performed simultaneously.
ひだ部の横断面の最終断面形状と略一致した横断面の内
挿型を管素材内に挿入して、前記第１の押板と第２の押
板を押し込み駆動することを特徴とする請求項１又は２
記載の放射状断面管の製造方法。3. Over a fold forming section of the tube material,
The inner insertion type of final cross-sectional shape and cross-section which substantially matches the cross-section of the fold portion is inserted into the tube material, and characterized in that Write-drive press the first push plate and a second push plate Claim 1 or 2
A method for manufacturing a radial cross-section tube according to the above.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10363627A JP3066366B2 (en) | 1998-12-22 | 1998-12-22 | Method of manufacturing radial cross-section tube |
| EP99959950A EP1063027A1 (en) | 1998-12-22 | 1999-12-21 | Method of producing pipes of radial cross-section |
| PCT/JP1999/007190 WO2000037192A1 (en) | 1998-12-22 | 1999-12-21 | Method of producing pipes of radial cross-section |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10363627A JP3066366B2 (en) | 1998-12-22 | 1998-12-22 | Method of manufacturing radial cross-section tube |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000190029A JP2000190029A (en) | 2000-07-11 |
| JP3066366B2 true JP3066366B2 (en) | 2000-07-17 |
Family
ID=18479784
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10363627A Expired - Lifetime JP3066366B2 (en) | 1998-12-22 | 1998-12-22 | Method of manufacturing radial cross-section tube |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP1063027A1 (en) |
| JP (1) | JP3066366B2 (en) |
| WO (1) | WO2000037192A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20220114845A (en) * | 2021-02-09 | 2022-08-17 | 이성민 | Manufacturing method of tube for heat exchanger, tube for heat exchanger manufactured thereby, and heat exchanger |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101524728B (en) * | 2008-03-06 | 2012-05-16 | 中国石油化工股份有限公司 | Method for molding expandable bellows |
| DE102010025593A1 (en) * | 2010-06-27 | 2011-12-29 | Technische Universität Dortmund | Method and apparatus for the incremental deformation of profile tubes, in particular of profile tubes with varying cross-sections over the longitudinal axis |
| JP6136280B2 (en) * | 2013-01-15 | 2017-05-31 | 山里産業株式会社 | Press apparatus, press mold used for the press apparatus, and press method |
| JP6286315B2 (en) * | 2014-07-31 | 2018-02-28 | 松本重工業株式会社 | Manufacturing method of heat exchanger tube for heat exchanger |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4470290A (en) * | 1981-09-04 | 1984-09-11 | Anderson-Cook, Inc. | Thin-wall sleeve forming |
-
1998
- 1998-12-22 JP JP10363627A patent/JP3066366B2/en not_active Expired - Lifetime
-
1999
- 1999-12-21 EP EP99959950A patent/EP1063027A1/en not_active Withdrawn
- 1999-12-21 WO PCT/JP1999/007190 patent/WO2000037192A1/en not_active Application Discontinuation
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20220114845A (en) * | 2021-02-09 | 2022-08-17 | 이성민 | Manufacturing method of tube for heat exchanger, tube for heat exchanger manufactured thereby, and heat exchanger |
| KR102438785B1 (en) * | 2021-02-09 | 2022-09-01 | 이성민 | Manufacturing method of tube for heat exchanger, tube for heat exchanger manufactured thereby, and heat exchanger |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1063027A1 (en) | 2000-12-27 |
| WO2000037192A1 (en) | 2000-06-29 |
| JP2000190029A (en) | 2000-07-11 |
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