EP0695592A1 - Verfahren und Vorrichtung zum Herstellen eines metallischen Wellrohres - Google Patents

Verfahren und Vorrichtung zum Herstellen eines metallischen Wellrohres Download PDF

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Publication number
EP0695592A1
EP0695592A1 EP95401575A EP95401575A EP0695592A1 EP 0695592 A1 EP0695592 A1 EP 0695592A1 EP 95401575 A EP95401575 A EP 95401575A EP 95401575 A EP95401575 A EP 95401575A EP 0695592 A1 EP0695592 A1 EP 0695592A1
Authority
EP
European Patent Office
Prior art keywords
tube
mandrel
forming
creating
groove
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
Application number
EP95401575A
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English (en)
French (fr)
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EP0695592B1 (de
Inventor
François Grosjean
Michel Huvey
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IFP Energies Nouvelles IFPEN
Original Assignee
IFP Energies Nouvelles IFPEN
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Publication of EP0695592A1 publication Critical patent/EP0695592A1/de
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Publication of EP0695592B1 publication Critical patent/EP0695592B1/de
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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
    • B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
    • B21D26/14—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces applying magnetic forces

Definitions

  • the present invention relates to a method and the means of implementing the method for manufacturing by magnetoforming elements of tubes with corrugated walls from metal tubes whose generatrices are substantially rectilinear and parallel to the longitudinal axis.
  • the basic metal tubes are cylindrical.
  • the sealing problem can be solved by using tubes made of flexible material, for example plastic, elastomer or equivalent, but very often these materials have a certain gas permeability which may not be acceptable. It is also possible to use sections of rigid metal tube linked together by flexible joints. The difficulty in sealing is then transferred to the joints of the connection.
  • Corrugated metal tubes can be used made from metal strips formed by rollers, spiraled on a mandrel and continuously welded in order to form a sealed tube having corrugations, therefore increased flexibility by the shape of the corrugations.
  • the weld bead remains watertight, the problem has been resolved in order to manufacture a metal tube, therefore perfectly gas-tight in particular, and flexible thanks to the more or less corrugated shape of the generators.
  • this manufacturing is slow and requires a fairly heavy manufacturing installation and welding is a technical solution for implementation and delicate control.
  • the resistance to bending fatigue is often reduced due to welding and this type of manufacturing gives good results only for certain types of metals.
  • this cold deformation notably has the drawback of being fairly slow and also of using fairly large machines, in particular when the tube has a diameter of the order of ten centimeters or more. This production is generally limited to relatively short sections.
  • the magnetoforming method is already used on elementary parts to carry out deformations or assemblies by crimping, welding, or plating. This method can be done by compression of the metal or on the contrary by expansion, according to the degree of deformation. However, no solution is provided in the case of the forming of the surface of a metal tube several meters long.
  • the magnetoforming process is well known and will therefore not be described here. It will be recalled that it consists in sending an electric pulse of very short duration in an electromagnetic coil arranged near the walls of the part to be formed.
  • the variation of the electromagnetic field produced by the coil creates in the walls of the conductive metal tube an induced current which, by interaction with the current circulating in the coil (Laplace law) exerts on the walls of the tube forces equivalent to an electromagnetic pressure , said pressure deforming the tube by plating the walls on a form matrix.
  • the forming means can be placed inside said tube portion, said means for creating a magnetic field surrounding the outside surface of the tube.
  • the tube can be deformed in a single activation according to a groove or a circular boss, the width of deformation being at most about one step.
  • the tube can be deformed in a groove or a helical boss around the axis of the tube.
  • the forming means can be moved longitudinally relative to the tube by a rotation of said forming means around the axis of the tube.
  • a first activation of the means for creating a magnetic field can partially deform the tube over a portion of the circumference of the tube relative to the desired final deformation, and after having moved the forming means by rotation, a second activation can complete the deformation on at least part of said partially deformed portion.
  • the metal tube can comprise at least one tube made of material that cannot be deformed by magnetoforming and a tube adapted to be deformed by magnetoforming, said tube that can be deformed by magnetoforming being interposed between the tube that cannot be deformed by magnetoforming and the means for creating a magnetic field.
  • the invention also relates to a device for forming a metal tube by electromagnetism comprising means for creating an electromagnetic field and means for forming.
  • the tube is placed between the means for creating an electromagnetic field and the forming means, and the device comprises means for moving the tube relative to the means for creating an electromagnetic field and the means for forming longitudinally along the axis. of the tube in order to deform the tube step by step.
  • the forming means may include a mandrel whose outside diameter is slightly less than the inside diameter of said tube, and the mandrel may have a groove on its outer surface.
  • the throat can be helical.
  • the device may comprise means for moving the tube longitudinally relative to the mandrel comprising means for rotating said mandrel relative to the tube and the means for creating an electromagnetic field may include means for connecting with the mandrel so that their respective positions remain fixed transversely to the tube.
  • the groove may have a depth of zero at its starting point and may deepen substantially regularly over a portion of helix length less than the length corresponding to about one step until reaching the depth corresponding to the constant shape of said groove which continues in a helix.
  • the cylindrical surface of the mandrel may have a determined length in order to center the tube properly on the mandrel while not blocking the tube when it is subjected to differential axial deformations resulting from the rates different radial deformations.
  • the end of the mandrel, on the origin side of the groove, can be chamfered or has a fillet with a large radius.
  • Figure 1 shows schematically a preferred embodiment of the method and the device according to the invention.
  • the reference 1 identifies the electromagnetic coil of substantially annular shape and placed around a tube 2 whose part located to the right of the coil is not yet formed, while the part of the tube located to the left of the coil has been formed and comprises corrugations 3.
  • Forming means or mandrel 4 are placed inside the tube.
  • the shape of the mandrel 4 in the zone 5 serves as a support and a matrix for the deformation of the tube 2 when the coil 1 is activated by an electric current.
  • the present invention recommends a method and a device for avoiding these drawbacks.
  • the width of the coil must be such that the electroforming is carried out at the first electrical pulse on only one hollow so that the material which forms the hollow can at best come from a displacement of the tube in the direction of a shortening.
  • the mandrel and the coil are moved the length of a recess to be able to form a second recess following the previous one.
  • the deformation over the entire tube thus continues step by step.
  • the mandrel In the case of a circular wave, the mandrel must be designed in a retractable manner so that it can be released from the already formed recesses.
  • the present invention is preferably applied to undulations arising from a groove or a boss, not circular (that is to say in a ring around the tube) but helical.
  • a mandrel inside or outside the tube having the shape corresponding to the corrugation in a helical groove can be moved relative to the tube by rotation about the axis of the mandrel.
  • the system is comparable to a screw (mandrel) in a corresponding female part (tube). A rotation of the screw makes it move longitudinally relative to the female part.
  • the mandrel, whether external or internal to the tube, does not need to be highly retractable or removable to allow deformations of the tube by successive activations of the coil.
  • Figures 2 and 4 illustrate a mandrel 6, seen in perspective in Figure 2 and in top view in Figure 4 according to arrow 7 ( Figure 2). It should be noted that a certain number of lines or dotted lines, helically or longitudinally have no geometric meaning but that they result from the CAD drawing mode and that they have been kept only for better readability of surfaces and volumes.
  • a trihedron Ox, y, z identifies the mandrel 6 of axis Ox.
  • the mandrel 6 comprises a cylindrical part 8 whose diameter is close to the internal diameter of the tube 2 ( Figure 1).
  • the groove 11 originates from the line 10 and has a little more than two helix pitches on the mandrel.
  • the end of the cylindrical part 8 is machined according to a leave 9 so that this part which penetrates into the tube not yet formed is in contact with the internal surface of the tube while providing the least possible friction.
  • the part 8 serves as axial guide of the tube on the mandrel and vice versa, but the tube shortens substantially as a result of the radial deformations provided by the electromagnetic field of the coil.
  • Figure 4 is a top view of the mandrel 6 according to arrow 7 ( Figure 2), that is to say that the wavy contours shown in Figure 4 are those of the intersection of the Oxy plane with the mandrel.
  • Line 11 is the starting point of the helical groove which here takes a little more than two steps to lead into zone 12 of the mandrel.
  • Line 13, diametrically opposite to the point of origin 11 of the groove, represents the shape of the groove as it continues helically until 12. At 11, we note that the bottom of throat is cylindrical.
  • the groove is deepened regularly on the half-circumference between 11 and 13. On the other hand, from 13, the groove has a constant profile up to the end of the mandrel.
  • the tube 2 not formed, positioned to the point referenced 14 of the mandrel.
  • the coil 1 surrounds the end of the tube 2.
  • Figures 5 and 6 show the sections of the mandrel according to the Oxu and Oxv planes referenced in Figure 2.
  • Figure 5 shows the section of the mandrel along the Oxu plane inclined at 60 ° to the Oxy plane.
  • Line 15 shows the profile of the groove in this plane, a fairly shallow profile.
  • FIG. 6 represents the section of the mandrel according to the Oxv plane inclined at 60 ° relative to the Oxu plane.
  • Line 16 shows the profile of the groove in this plane, a profile less deep than the final profile, but nevertheless quite close.
  • the profiles diametrically opposite to the groove of increasing depth are connected on the right on a cylindrical part of the mandrel. This shape is advantageous because it promotes the shortening of the tube. This function will be explained in more detail below.
  • FIG. 4 represents the first step of electromagnetic forming on a fully cylindrical tube 2.
  • the tube is brought in and positioned by conventional means.
  • the coil 1 and the mandrel 6 are linked, for example by a frame and an axis which carries the mandrel, said axis having a certain length which will allow penetration or extraction of the mandrel relative to the tube as and when formed and the coil is thus linked to the mandrel so that it remains in the same radial plane.
  • the tube 2 brought to point 14 of the mandrel covers several zones, starting from the right of the mandrel: a cylindrical part, a half-step of the groove of increasing depth over a half-turn, a certain portion of groove having the final profile.
  • the tube 2 is pressed against the mandrel by taking its shape, that is to say: a groove with variable depth and a groove with a final profile.
  • This first shot does not pose any problem of elongation of the material because no prior deformation blocks the possibility of displacement of the tube longitudinally, whether by the right or the left with reference to FIG. 4.
  • the mandrel can only be moved relative to the tube by rotation, according to the thread that represents the groove initiation.
  • rotating the mandrel here anticlockwise since the propeller is on the right, while blocking the rotation of the tube around its axis, the mandrel is moved to the right by a distance directly related to the angle of rotation and the pitch of the propeller. For example, a rotation of half a turn will move the mandrel back half a step. It is assumed that in the example illustrated in FIG. 4, a half-turn of unscrewing is carried out from the right of the mandrel in the tube.
  • the deformation of the tube continues by repeating this second step.
  • the adaptation must also take into account the geometry of the tube and its material.
  • lubricant or equivalent products can be inserted between the tube and the mandrel, before firing. These products can be injected into the annular space by means of orifices opening out at the bottom of the groove of the mandrel.
  • the invention is not limited to the example described here, other applications can be implemented.
  • the method of forming by electromagnetism may not apply.
  • corrugated tube portions manufactured within the limit of the penetration of the mandrel into the tube, these can be welded together to form a continuous tube of greater length.

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  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
EP95401575A 1994-08-02 1995-06-29 Verfahren und Vorrichtung zum Herstellen eines metallischen Wellrohres Expired - Lifetime EP0695592B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9409680 1994-08-02
FR9409680A FR2723329B1 (fr) 1994-08-02 1994-08-02 Methode et dispositif pour fabriquer un tube metallique ondule

Publications (2)

Publication Number Publication Date
EP0695592A1 true EP0695592A1 (de) 1996-02-07
EP0695592B1 EP0695592B1 (de) 2001-12-12

Family

ID=9466078

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95401575A Expired - Lifetime EP0695592B1 (de) 1994-08-02 1995-06-29 Verfahren und Vorrichtung zum Herstellen eines metallischen Wellrohres

Country Status (7)

Country Link
US (1) US5619878A (de)
EP (1) EP0695592B1 (de)
AU (1) AU689890B2 (de)
BR (1) BR9503520A (de)
DE (1) DE69524496T2 (de)
FR (1) FR2723329B1 (de)
NO (1) NO307819B1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010109028A1 (es) * 2009-03-26 2010-09-30 Fundacion Labein Dispositivo y método de conformado para la obtención de deformaciones locales en perfiles abiertos
CN104874693A (zh) * 2015-05-29 2015-09-02 中国建筑技术集团有限公司 矩形薄壁钢管波纹成型夹具及其使用方法
CN105263644A (zh) * 2013-04-10 2016-01-20 乌尔里希·伯夫克 由长条型材制造金属板的方法和设备

Families Citing this family (22)

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Publication number Priority date Publication date Assignee Title
US5692853A (en) * 1995-11-27 1997-12-02 Curtiss Wright Flight Systems Inc. Threaded joint construction and rod assembly incorporating same
US5927344A (en) * 1996-01-03 1999-07-27 Nobileau; Philippe Subsea flexible pipe
DE19604311A1 (de) * 1996-02-07 1997-08-14 Ralph Peter Dr Ing Hegler Verbundrohr mit Muffe und Verfahren zu seiner Herstellung
GB2379996B (en) * 2001-06-05 2004-05-19 Tayside Flow Technologies Ltd Flow means
GB2369797B (en) * 2001-11-20 2002-11-06 Tayside Flow Technologies Ltd Helical formations in tubes
AUPR982302A0 (en) * 2002-01-03 2002-01-31 Pax Fluid Systems Inc. A fluid flow controller
US20060135340A1 (en) * 2002-07-30 2006-06-22 Cheang Hong N P Spherical nano-composite powder and a method of preparing the same
EP1552837A1 (de) * 2002-08-01 2005-07-13 Chugai Seiyaku Kabushiki Kaisha Antipsoriasis-mittel
JP4136802B2 (ja) * 2002-09-27 2008-08-20 株式会社神戸製鋼所 ビード付き円筒形リングの製造方法
GB0309616D0 (en) 2003-04-28 2003-06-04 Angiomed Gmbh & Co Loading and delivery of self-expanding stents
GB0315714D0 (en) * 2003-07-04 2003-08-13 Tayside Flow Technologies Ltd An internal formation for a conduit
GB0322511D0 (en) * 2003-09-25 2003-10-29 Angiomed Ag Lining for bodily lumen
US20060260374A1 (en) * 2005-05-23 2006-11-23 Flex-Weld, Inc. Hydroforming machine
GB0816965D0 (en) * 2008-09-16 2008-10-22 Angiomed Ag Stent device adhesively bonded to a stent device pusher
GB0901496D0 (en) 2009-01-29 2009-03-11 Angiomed Ag Delivery device for delivering a stent device
GB0909319D0 (en) 2009-05-29 2009-07-15 Angiomed Ag Transluminal delivery system
CN103861898B (zh) * 2012-12-07 2016-09-21 中国石油化工股份有限公司 用于膨胀管件的电磁整形装置及方法
CN103978086A (zh) * 2014-05-28 2014-08-13 湘潭大学 一种采用电磁预变成形技术加工波纹状管件的工艺
CN105458058B (zh) * 2014-09-11 2017-11-28 首都航天机械公司 一种缩小或消除多层波纹管层间间隙的方法
CN105798102B (zh) * 2016-04-29 2018-06-26 苏州大学 管坯起皱装置
CN109848280B (zh) * 2019-03-13 2020-07-31 中南大学 一种波纹管的分区电磁成形方法及成形装置
CN110052526B (zh) * 2019-05-21 2021-02-23 哈尔滨工业大学 一种螺纹管加工装置及其加工方法

Citations (1)

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US3372564A (en) * 1965-04-19 1968-03-12 Simplex Wire & Cable Co Method for shaping metal tubes

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US3212311A (en) * 1962-04-17 1965-10-19 Inoue Kiyoshi Method and apparatus for electromagnetic shaping of metallic bodies
BE664918A (de) * 1964-06-11 1900-01-01
US3606780A (en) * 1967-11-28 1971-09-21 Kichisaburo Nagahara Method for manufacturing helical pipe for heat exchangers
US3503246A (en) * 1967-12-28 1970-03-31 Hiroyasu Shiokawa Method of manufacturing a spiral metal tube
US3581456A (en) * 1968-11-18 1971-06-01 American Can Co Applying a threaded closure by magnetic impulse
FR2414966A1 (fr) * 1977-12-26 1979-08-17 Barras Provence Outil pour fixation de pieces le long de tubes
SU1696050A1 (ru) * 1989-03-13 1991-12-07 Московский авиационный институт им.Серго Орджоникидзе Способ поперечного последовательного гофрировани трубчатых заготовок

Patent Citations (1)

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Publication number Priority date Publication date Assignee Title
US3372564A (en) * 1965-04-19 1968-03-12 Simplex Wire & Cable Co Method for shaping metal tubes

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010109028A1 (es) * 2009-03-26 2010-09-30 Fundacion Labein Dispositivo y método de conformado para la obtención de deformaciones locales en perfiles abiertos
CN105263644A (zh) * 2013-04-10 2016-01-20 乌尔里希·伯夫克 由长条型材制造金属板的方法和设备
CN105263644B (zh) * 2013-04-10 2017-07-11 乌尔里希·伯夫克 由长条型材制造金属板的方法和设备
US10040109B2 (en) 2013-04-10 2018-08-07 Ulrich Bruhnke Method and apparatus for producing metal sheets from strand-shaped profiles
CN104874693A (zh) * 2015-05-29 2015-09-02 中国建筑技术集团有限公司 矩形薄壁钢管波纹成型夹具及其使用方法

Also Published As

Publication number Publication date
EP0695592B1 (de) 2001-12-12
AU689890B2 (en) 1998-04-09
DE69524496D1 (de) 2002-01-24
BR9503520A (pt) 1996-05-28
NO953028D0 (no) 1995-08-01
US5619878A (en) 1997-04-15
DE69524496T2 (de) 2002-05-16
FR2723329A1 (fr) 1996-02-09
FR2723329B1 (fr) 1996-09-13
NO953028L (no) 1996-02-05
AU2339995A (en) 1996-02-15
NO307819B1 (no) 2000-06-05

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