EP0782891B1 - Procédé de fabrication de tubes ondulés - Google Patents

Procédé de fabrication de tubes ondulés Download PDF

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Publication number
EP0782891B1
EP0782891B1 EP96111405A EP96111405A EP0782891B1 EP 0782891 B1 EP0782891 B1 EP 0782891B1 EP 96111405 A EP96111405 A EP 96111405A EP 96111405 A EP96111405 A EP 96111405A EP 0782891 B1 EP0782891 B1 EP 0782891B1
Authority
EP
European Patent Office
Prior art keywords
tube
corrugation
corrugated
corrugated portion
height
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
Application number
EP96111405A
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German (de)
English (en)
Other versions
EP0782891A2 (fr
EP0782891A3 (fr
Inventor
Christian Lutz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Supervis
Original Assignee
Supervis
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Filing date
Publication date
Application filed by Supervis filed Critical Supervis
Publication of EP0782891A2 publication Critical patent/EP0782891A2/fr
Publication of EP0782891A3 publication Critical patent/EP0782891A3/fr
Application granted granted Critical
Publication of EP0782891B1 publication Critical patent/EP0782891B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B21D15/04—Corrugating tubes transversely, e.g. helically
    • B21D15/06—Corrugating tubes transversely, e.g. helically annularly

Definitions

  • the invention relates to a method for producing corrugated metal pipes with the features of the preamble of claim 1 and a tool to perform this procedure.
  • the initially smooth cylindrical tube is in a die used, the wall of which is corrugated. Then in the to be deformed Tube inserted an elastic pressing body, which is stamped from both sides is compressed, whereby the tube is deformable in sections. Each corrugation is shaped in one step. It is a very complex process Process and can only be used for thin-walled pipes.
  • DE-A-32 24 308 shows and describes a tool with which on a cylindrical Output tube a trough is stamped step by step.
  • a high hydraulic pressure is built up in the pipe and subject the tube piece as a whole to an axial compressive force and thereby shorten it, the lying between the troughs supported by the fittings Pipe sections are folded outwards. This measure is also very complex.
  • EP-A-298 832 provides a radially expandable one to be deformed Pipe piece insertable dome with a corrugation against which sector-shaped, extending over the length of the corrugation, a corresponding one Cheeks with corrugation are moved hammering.
  • the thereby achieved Deformation has a wall thickness, which is due to the extension of the tube in the corrugated area is weaker than the thickness of the undeformed tube wall.
  • FR-A-2 176 707 also sees a radially expandable mandrel with a corrugated one Surface in front.
  • the outer jaws are several that surround the tube Gears provided, the arrangement being such that the teeth of the Comb the gears with the corrugation of the dome.
  • These gears are on one Carriage mounted, which is moved along the pipe to be deformed. Also at this arrangement, it is inevitable that in the corrugated area of the tube Material is stretched excessively.
  • GB-A-2 268 429 shows and describes an expandable mandrel which is disclosed in Axial direction is divided into a plurality of disks, the surface of which one Form curl.
  • sector-shaped, disc-like, outer jaws can be set, which, in cooperation with the mandrel mentioned, the corrugation of the pipe to form.
  • corrugated pipe pieces are related to Steering columns used in motor vehicles and serve as energy consuming in the event of a crash Intermediate element. Inside the steering column has this corrugated tube record and transmit the torques required for steering.
  • the corrugated tube produced by the previously known method has in inner area the smallest wall thicknesses, although here in this inner area the greatest stresses when transmitting the torques mentioned occur. In this case, therefore, a piece of pipe must be selected, the one has a sufficiently large wall thickness so that on the corrugated tube to each inner ring zones subject to the highest stresses no impermissible stresses occur.
  • the invention which aims at a method, is based on this prior art to propose with which a very pronounced curl can be achieved can, i.e. a corrugation in which the ratio of the height of the corrugation to the wavelength is about 1: 1 1, the wall thickness of the outlet pipe for reasons of stability also not only essentially preserved in the area of the inner corrugation should remain, rather the wall thickness should be in the area of the inner corrugation be reinforced.
  • a corrugation in which the ratio of the height of the corrugation to the wavelength is about 1: 1
  • the wall thickness of the outlet pipe for reasons of stability also not only essentially preserved in the area of the inner corrugation should remain, rather the wall thickness should be in the area of the inner corrugation be reinforced.
  • the middle one Flank angle is at least 45 °, preferably 65 °.
  • corrugated tubes are obtained which in Area of the inner annular zones have a wall thickness that is detectable is greater than the wall thickness of the outlet tube, so that corrugated pipes are ideal for the above-mentioned purpose. They have the highest operational stresses wherever they are used of torques occur, even the greatest wall thickness.
  • the press jaws are on several levels provided in pairs and disc-shaped and each press jaw has a semi-circular opening, the surface delimiting the opening is stepped and the height of the paragraph at least the height of the corrugation formed by the folding corresponds.
  • a mandrel 2 In a initially cylindrical tube 1 with a smooth surface, the two sides or only can be open on one side, a mandrel 2 is used, which consists of several sector-shaped trained sections 3, between which for radial expansion a wedge shaft 4 is retractable (arrow 5). Around the tube 1 are also sector-shaped outer jaws 6 arranged. Over their length L are the outer ones Bake 6 and also the sections 3 of the mandrel 2 on the facing each other Sides with in-phase and essentially identical corrugations 7 and 8 equipped, the wave trains of this corrugation relatively narrow Show wave valleys and elongated wave crests.
  • the first tool has a relative Flat corrugation, i.e. a corrugation with a small height, is the result of the follow-up tool to follow tool this corrugation more and more pronounced, its height decreases from Tool to tool too.
  • a relative Flat corrugation i.e. a corrugation with a small height
  • the tube 1, which is initially smooth and lies between the mandrel 2 and the outer jaws 6 is now preformed in that the mandrel 2 is spread radially and the outer Jaws 6 are fed radially against the mandrel 2 (arrow 11), so that this Tube 1 receives a wave-like deformation over the length L, that of tool tool becomes more and more pronounced until it reaches the shape shown in Fig. 2 in is shown on an enlarged scale. From this illustration it can also be seen that the wave valleys 9 are relatively narrow, whereas the wave crests 10 are elongated.
  • the length of this preformed corrugation 20 according to FIG. 2 is 1 a wave several times its height H, for example three to four times.
  • the length L1 is that towards the inside of the tube directed wave troughs only a fraction of the length L2 of the outside directed wave crests 10, for example the ratio is 0.3 to 0.6, the lengths L1, L2 are measured in half the height H of the shaft.
  • the wave troughs 9 directed towards the interior of the tube are thus pronounced and deep, the mean flank angle ⁇ being at least 45 °, preferably 60 ° and more.
  • This corrugation 20 shown in FIG. 2 is carried out in several steps with several Tools achieved, whereby the individual tools differ in that that the corrugation of the interacting surfaces of the tool kit too Tool set is becoming more pronounced, i.e. the height H of the corrugation of the tool set tool set is getting bigger, the flank angles are getting bigger steeper. Usually two sets of tools will suffice.
  • the wall thickness of the tube 1 not only remains essentially along the corrugation obtained, in the wave valleys 9 this wall thickness is even increased measurably.
  • the thus preformed tube 1 which is closed on one side in the exemplary embodiment shown and has an extension 12 at its closed end now placed on a cylindrical mandrel 13 with a smooth surface, the is expediently constructed, such as that described in connection with FIG. 1 Mandrel 2, only that here the outer surfaces of the individual sector-shaped sections - As mentioned - have a smooth surface.
  • This mandrel 13 becomes radial spread so far by inserting a wedge shaft that its outer diameter abuts the inner diameter of the preformed corrugation 20.
  • the inside of the troughs 9 of the preformed tube 1 are located on the cylindrical smooth surface of the mandrel 13.
  • This tool shown in Fig. 3 is in the range of press jaws 15, of which one is shown in plan view in FIG. 7.
  • These rectangular press jaws 15, provided several times in different levels and in pairs are (Fig. 4) have a semi-circular opening 16, the boundary surface 17 is stepped, the height h at least corresponding to the height, to which the preformed corrugation (Fig. 2) is then unfolded.
  • This paired arrangement of the press jaws 15 relative to that shown in Fig. 3 Tool is illustrated in FIG. 4.
  • the arrangement is such that the projecting Heels of the press jaws 15 in the levels of the troughs 9 of the preformed Corrugation 20 of the tube 1 are.
  • press jaws 15 are now against that the preformed tube 1 located on the mandrel 13 (FIG. 5), the projecting Drive paragraphs of the press jaws 15 in the troughs 9 and the press jaws 15 enclose the pipe. Due to the deep wave valleys 9 and steep flanks a positive connection is achieved compared to the press jaws 15, which subsequent correct folding is ensured without this Folding process should be built up a pressure inside the tube. The Support for the troughs that can be achieved with the mandrel used is sufficient out.
  • a press ram 18 moves against the pair of press jaws located at the top and presses the pressing jaws 15, which are initially spaced apart from one another (FIG. 5) together.
  • the press jaws 15 lying at the bottom of the row are marked by a Supported abutment, which is indicated here by the arrows 19 (Fig. 6).
  • a Press ram 18 moves against the pair of press jaws located at the top and presses the pressing jaws 15, which are initially spaced apart from one another (FIG. 5) together.
  • the press jaws 15 lying at the bottom of the row are marked by a Supported abutment, which is indicated here by the arrows 19 (Fig. 6).
  • the pipe 1 to be deformed can be single-layer or a multi-layer Have a structure made up of several tubes pushed into each other.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Length Measuring Devices Characterised By Use Of Acoustic Means (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)

Claims (7)

  1. Procédé de fabrication de tubes métalliques ondulés, dans lequel on introduit dans le tube métallique cylindrique à onduler, tout d'abord lisse, un mandrin radialement extensible avec une ondulation s'étendant dans sa direction axiale et on imprime au moyen de mors extérieurs - par rapport au tube métallique - à appliquer contre le tube ayant une ondulation correspondant au moins approximativement à l'ondulation du mandrin, une première ondulation, caractérisé en ce que la pré-déformation de l'ondulation (20) du tube (1) est produite en plusieurs étapes de travail identiques successives avec des mandrins (2) et des mors (6) ayant des ondulations (7; 8) de différentes hauteurs, où, à partir du tronçon de tube cylindrique, le creux d'ondulation interne (9) est pressé vers l'intérieur et, ensuite, dans le tube ainsi déformé (1) est introduit un mandrin (13) radialement extensible d'un diamètre extérieur qui correspond au diamètre intérieur de l'ondulation préformée (20), et en ce que, dans les creux (9) de l'ondulation préformée (20), sont appliqués radialement de l'extérieur des mors de pression (15) en forme de disques, espacés au départ les uns des autres et entourant le tube (1) et ces mors de pression (15) sont pressés ensuite axialement ensemble pour former l'ondulation (20) du tube (1).
  2. Procédé selon la revendication 1, caractérisé en ce qu'on produit comme pré-déformation une ondulation (20) dans laquelle la longueur (1) d'une onde est un multiple de sa hauteur (H), par exemple le triple ou le quadruple.
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce qu'on produit comme pré-déformation une ondulation (20) dans laquelle la longueur (l1) des creux d'ondulation dirigés vers l'intérieur du tube ne correspond qu'à une fraction de la longueur (l2) des sommets d'ondulation (10) dirigés vers l'extérieur, par exemple 0,3 à 0,6, les longueurs (l1, l2) étant mesurées à la moitié de la hauteur (H) de l'onde.
  4. Procédé selon la revendication 3, caractérisé en ce que les creux d'ondulation (9) dirigés vers l'intérieur du tube sont formés avec un angle de flan moyen (α) d'au moins 45°, de préférence 65°.
  5. Procédé selon l'une quelconque des revendications 1 à 4, caractérisé en ce que l'ondulation pré-formée (20) est refoulée par la suite assez largement pour que le rapport de la longueur d'onde à sa hauteur soit d'environ 1:1.
  6. Dispositif de fabrication d'un tube métallique ondulé selon l'une quelconque des revendications 1 à 5, comprenant des outils constitués de mandrins (2) et de mors (6) d'ondulations de différentes hauteurs pour produire la pré-déformation de l'ondulation du tube (1), et un outil qui comprend un mandrin (13) radialement extensible avec un diamètre externe qui correspond au diamètre interne de l'ondulation pré-formée (20), et des mors de pression (15) entourant extérieurement le tube (1), qui sont prévus par paires dans plusieurs plans et se présentent en forme de disques, chacun des mors de pression présentant une ouverture semi-circulaire (16) et la surface (17) qui délimite l'ouverture (16) étant décalée en forme de gradin tandis que la hauteur (h) du gradin correspondant au moins à la hauteur de l'ondulation formée par le refoulement.
  7. Tube ondulé qui comprend des sommets d'ondulation (10) et des creux d'ondulation (9) formant des zones annulaires internes du tube, fabriqué selon le procédé de l'une quelconque des revendications 1 à 5, caractérisé en ce que l'épaisseur de paroi des zones annulaires internes est supérieure à celle des autres zones du tube.
EP96111405A 1995-08-12 1996-07-16 Procédé de fabrication de tubes ondulés Expired - Lifetime EP0782891B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19529731 1995-08-12
DE1995129731 DE19529731A1 (de) 1995-08-12 1995-08-12 Verfahren zur Herstellung von gewellten Metallrohren

Publications (3)

Publication Number Publication Date
EP0782891A2 EP0782891A2 (fr) 1997-07-09
EP0782891A3 EP0782891A3 (fr) 1997-11-05
EP0782891B1 true EP0782891B1 (fr) 2001-12-12

Family

ID=7769359

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96111405A Expired - Lifetime EP0782891B1 (fr) 1995-08-12 1996-07-16 Procédé de fabrication de tubes ondulés

Country Status (7)

Country Link
EP (1) EP0782891B1 (fr)
JP (1) JP4022273B2 (fr)
KR (1) KR970009918A (fr)
BR (1) BR9604092A (fr)
CA (1) CA2182811C (fr)
DE (2) DE19529731A1 (fr)
ES (1) ES2169777T3 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10211743A1 (de) 2002-03-14 2003-11-06 Thyssenkrupp Presta Ag Eschen Lenkspindel einer Lenksäule für ein Kraftfahrzeug
DE102006005736A1 (de) 2006-02-07 2007-08-09 Thyssenkrupp Presta Ag Wellrohr
JP2011121103A (ja) * 2009-12-14 2011-06-23 Jtekt Corp 中空ラック軸の製造方法及び中空ラック軸
JP5745785B2 (ja) * 2010-06-18 2015-07-08 坂本工業株式会社 筒型成形品の成形方法および装置
EP2845664A1 (fr) * 2013-09-10 2015-03-11 Nexans Procédé et dispositif de fabrication d'un tuyau ondulé en métal
KR101968665B1 (ko) * 2017-05-22 2019-04-12 정원재 파이프의 레벨홈 성형장치
CN109047424B (zh) * 2018-07-13 2023-05-30 浙江和良智能装备有限公司 一种波纹管成形机
CN111545591A (zh) * 2020-05-19 2020-08-18 王清伟 一种双层复合铝箔风管制作成型加工方法
CN112958670B (zh) * 2021-03-29 2022-12-27 西安恒热热力技术有限责任公司 一种补偿器加工设备及加工方法
CN113399491B (zh) * 2021-06-03 2022-06-21 浙江长兴和良智能装备有限公司 一种多工位式管端挤鼓成型设备、系统及复合模具组件

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE34537C (de) * S. FOX in Leeds-Forge, New -Wortley, Leeds, York, England Prefswerk zur Herstellung gewellter Röhren mit Nuthen zum Schutze der Naht
US3577621A (en) * 1969-05-14 1971-05-04 Koppy Tool Corp Stretch method for making a tubular product
DE3004838C2 (de) * 1980-02-09 1984-09-13 Benteler-Werke Ag Werk Neuhaus, 4790 Paderborn Vorrichtung zur Herstellung eines Rohrkörpers mit Querwellen
DE3514485A1 (de) * 1985-04-22 1986-10-23 Heinz 4000 Düsseldorf Regenhardt Verfahren und vorrichtung zur herstellung von schlitzbruecken-filterrohren
FR2617415B1 (fr) * 1987-07-02 1991-08-09 Nacam Procede et dispositif pour le faconnage par martelage d'un tube a ondes et son application a des tubes pour l'industrie automobile

Also Published As

Publication number Publication date
KR970009918A (ko) 1997-03-27
DE19529731A1 (de) 1997-02-13
DE59608440D1 (de) 2002-01-24
CA2182811A1 (fr) 1997-02-13
EP0782891A2 (fr) 1997-07-09
ES2169777T3 (es) 2002-07-16
JP4022273B2 (ja) 2007-12-12
CA2182811C (fr) 2008-12-09
EP0782891A3 (fr) 1997-11-05
JPH09103826A (ja) 1997-04-22
BR9604092A (pt) 1998-06-16

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