EP1584382B1 - Méthode d'hydroformage d'une ébauche tubulaire en acier - Google Patents

Méthode d'hydroformage d'une ébauche tubulaire en acier Download PDF

Info

Publication number
EP1584382B1
EP1584382B1 EP05075830A EP05075830A EP1584382B1 EP 1584382 B1 EP1584382 B1 EP 1584382B1 EP 05075830 A EP05075830 A EP 05075830A EP 05075830 A EP05075830 A EP 05075830A EP 1584382 B1 EP1584382 B1 EP 1584382B1
Authority
EP
European Patent Office
Prior art keywords
blank
planar
tubular
friction
tubular blank
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.)
Not-in-force
Application number
EP05075830A
Other languages
German (de)
English (en)
Other versions
EP1584382A1 (fr
Inventor
Maarten Hendrik Kelder
Maria Gemma Othilde Klaassen
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.)
Tata Steel Ijmuiden BV
Original Assignee
Corus Staal BV
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Corus Staal BV filed Critical Corus Staal BV
Priority to ES05075830T priority Critical patent/ES2305998T3/es
Priority to EP05075830A priority patent/EP1584382B1/fr
Publication of EP1584382A1 publication Critical patent/EP1584382A1/fr
Application granted granted Critical
Publication of EP1584382B1 publication Critical patent/EP1584382B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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

Definitions

  • the invention relates to a method for hydroforming a steel tubular blank into a product.
  • a method for hydroforming a tubular blank manufactured from a planar blank is e.g. known from JP-A-2002 035 854 .
  • a tubular blank is usually produced from a planar blank, which is cut from a metal sheet. This planar blank is formed into a tube which is then laser welded to form the tubular blank. In a typical hydroforming operation a tube, or a tubular blank, is bent into the overall shape desired for the final part, and then placed between a pair of dies.
  • the dies provide a cavity around the tube or tubular blank which has an interior shape matching the exterior shape desired for the part. Then, the ends of the tube or tubular blank are sealed and it is internally pressurised to expand it into the shape of the dies' cavity.
  • means to influence the friction between the tube or tubular blank and the forming tools are often used. These means may for instance comprise in-line lubrication stations in the hydroforming line. Friction influencing means may also be applied manually. These types of friction influencing means are complicated and/or expensive.
  • one or more of the objects are reached by a method for hydroforming a steel tubular blank into a product according to claim 1.
  • the planar blank is produced from a coil and the second layer with a friction influencing function is applied to the coil prior to producing the planar blank.
  • the second layer with a friction influencing function is applied to the coil immediately prior to forming of the planar blank, i.e. between decoiling and blanking.
  • the advantage of this method is that the second layer with a friction influencing function is applied to a large surface, thereby facilitating quality control and reproducible application of the layer or layers. This also enables to produce planar blanks and hence tubular blanks at a lower cost.
  • the tubular blank is already provided with a layer with a friction influencing function prior to entering the forming line. Consequently there is no need to apply means with a friction influencing function, such as a lubricant, in the forming line, making in-line stations or manual application of means with a friction influencing function obsolete.
  • the method according to the invention also enables to apply the means with a friction influencing function in a controlled manner thereby making the application of the means more reproducible, and thereby also making the behaviour of the tubular blank during forming more reproducible. This increases the stability and reproducibility of the forming process and results in a more reproducible formed product.
  • the layer with the friction influencing function to the planar blank is relatively straightforward and easily controlled, leading to an improved efficiency and quality of the friction behaviour of the tubular blank during forming.
  • a very controlled and reproducible application is obtained.
  • the tubular blank, manufactured as described hereinabove, is thereafter formed into a product at least partly by hydroforming.
  • the tailored friction on the outside provides a hydroformed product with the required surface, dimensions and properties.
  • the foil is a hydrocarbon such as polyethylene or a fluorocarbon such as polytetrafluorethylene.
  • This type of layer with a friction influencing function functions as a lubricant.
  • the foil enables easy application to the coil or the planar blank, for instance by known methods such as laminating or coextrusion of the foil, whereas it provides excellent adhesion to the planar blank prior to or during forming of the tubular blank and also during storage, handling and forming of the tubular blank.
  • the blank is essentially quadrangular, such as essentially rectangular or essentially tapered.
  • This type of lubricated blank will result in an essentially cylindrical tubular blank or an essentially conical tubular blank. The latter facilitates forming sloping shapes in the formed product.
  • the planar blank comprises at least a first blank portion and a second blank portion and wherein the first blank portion has different geometrical dimensions than the second blank portion and/or wherein the first blank portion is made from a different material than the second blank portion and/or wherein the material of the first blank portion has different properties than the material of the second blank portion.
  • planar blanks comprising a plurality of blank portions, i.e. at least two, can be produced by joining together a corresponding number of planar blank portions, each produced from metal sheet, by means of a joining technique such as welding for example laser-welding.
  • This embodiment enables to choose the geometry, for instance the thickness of the blank portion, or the type of material, or the properties of the material, independently of the geometry, the type of material, or the properties of the material of the second blank portion.
  • the strength of the first blank portion may be chosen differently from that of the second blank portion because of local strength requirements in the final formed product.
  • material for the first blank portion having different resistance to corrosion than the material of the second blank portion because of local requirements for corrosion resistance in the final formed product.
  • the invention also encompasses tubular blanks made from planar blanks having more than two blank portions, which blank portions may all have different characteristics.
  • the aim of the layer with a friction influencing function is to decrease the friction between the tubular blank and the forming tools which can be used to form the tubular blank into a product. Decreasing the friction facilitates forming the tubular blank into a product. It may also reduce the forces required to form the tubular blank into a product during the forming process.
  • the function of the second layer with a friction influencing factor is to decrease the friction between the tubular blank and the forming tools which can be used to form the tubular blank into a product.
  • the second layer being on the outer surface of the tubular blank, is likely to benefit from a reduced friction in terms of reducing the process forces during forming, but also in terms of a reduced wear of the outer surface and the forming tools.
  • a tubular blank may be produced from a planar blank, which is provided with a layer with a friction influencing function on the second side of the planar blank prior to forming the planar blank into a tubular blank.
  • the friction influencing function is chosen so as to reduce the friction on the second surface (i.e. the outside of the tubular blank) so as to influence the friction between the tubular blank and the hydroforming tools used to form the tubular blank into the hydroformed product.
  • the reduced friction on the outside of the tubular blank provides a smooth surface whilst also limiting the process forces.
  • a tubular blank may be produced from a planar blank, wherein the planar blank has a plurality of blank portions.
  • a planar blank may comprise three blank portions, such as a first blank portion of 2 mm aluminium with a proof stress of 150 MPa, a second blank portion comprising a 1 mm high strength low alloy steel with a tensile strength of above 600 MPa and a third blank portion comprising an 1.5 mm austenitic stainless steel with excellent corrosion resistance.
  • the tubular blank, and the final product which is made from it, is provided with a layer of friction influencing function which is applied to the second surface of the planar blank comprising a plurality of blank portions, and which function is chosen so as to reduce the friction.
  • a layer of friction influencing function which is applied to the second surface of the planar blank comprising a plurality of blank portions, and which function is chosen so as to reduce the friction.
  • a tubular blank may be produced from a planar blank, which is provided on its second surface with a first layer with a first friction influencing function on part of the first side and with another layer with a another friction influencing function on at least part of the second surface wherein the two layers each with their respective friction influencing function may at least partly overlap.
  • the layer or layers with the friction influencing function can be used to increase the friction in certain areas of the tubular blank, thus enabling a controlled material flow, which could be beneficial to reduce or increase strain levels in certain areas of the product.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Metal Extraction Processes (AREA)

Claims (5)

  1. Méthode d'hydroformage d'une ébauche tubulaire en acier en un produit, comprenant les étapes suivantes:
    - la fourniture d'une ébauche d'acier essentiellement plane, ladite ébauche plane comprenant une première surface et une deuxième surface;
    - la production de l'ébauche tubulaire à partir de l'ébauche plane, où la deuxième surface de l'ébauche plane devient le côté extérieur de l'ébauche tubulaire;
    dans laquelle une deuxième couche présentant une deuxième fonction d'influence de frottement est appliquée sur au moins une partie de la deuxième surface de l'ébauche plane avant de transformer l'ébauche plane en une ébauche tubulaire, et dans laquelle l'ébauche est produite à partir d'une bobine, et la deuxième couche est appliquée sur la bobine avant la production de l'ébauche, de manière à influencer le frottement entre l'ébauche tubulaire et les outils d'hydroformage qui peuvent être utilisés pour hydroformer l'ébauche tubulaire pour obtenir le produit, et dans laquelle la deuxième couche est appliquée sous la forme d'un film, d'un lubrifiant sec, d'une cire ou d'une huile, et
    - une étape finale d'hydroformage de l'ébauche tubulaire pour obtenir le produit.
  2. Méthode selon la revendication 1, dans laquelle la deuxième couche est appliquée sous la forme d'un film, le film étant un hydrocarbure tel que le polyéthylène ou un fluorocarbure tel que le polytétrafluoroéthylène.
  3. Méthode selon l'une quelconque des revendications 1 à 2, dans laquelle l'ébauche plane est essentiellement quadrangulaire, par exemple essentiellement rectangulaire ou essentiellement trapézoïdale.
  4. Méthode selon l'une quelconque des revendications 1 à 3, dans laquelle l'ébauche plane comprend au moins une première partie d'ébauche et une deuxième partie d'ébauche, et dans laquelle la première partie d'ébauche présente des dimensions géométriques différentes de celles de la deuxième partie d'ébauche, et/ou dans laquelle la première partie d'ébauche est constituée d'une matière différente de celle constituant la deuxième partie d'ébauche, et/ou dans laquelle la matière de la première partie d'ébauche présente des propriétés différentes de celles de la matière de la deuxième partie d'ébauche.
  5. Méthode selon l'une quelconque des revendications 1 à 4, dans laquelle la deuxième couche comprenant un facteur d'influence de frottement diminue le frottement entre l'ébauche tubulaire et les outils d'hydroformage qui peuvent être utilisés pour transformer l'ébauche tubulaire en un produit.
EP05075830A 2004-04-09 2005-04-08 Méthode d'hydroformage d'une ébauche tubulaire en acier Not-in-force EP1584382B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
ES05075830T ES2305998T3 (es) 2004-04-09 2005-04-08 Metodo para la hidro-conformacion de una pieza en bruto tubular de acero.
EP05075830A EP1584382B1 (fr) 2004-04-09 2005-04-08 Méthode d'hydroformage d'une ébauche tubulaire en acier

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP04076086 2004-04-09
EP04076086 2004-04-09
EP05075830A EP1584382B1 (fr) 2004-04-09 2005-04-08 Méthode d'hydroformage d'une ébauche tubulaire en acier

Publications (2)

Publication Number Publication Date
EP1584382A1 EP1584382A1 (fr) 2005-10-12
EP1584382B1 true EP1584382B1 (fr) 2008-07-02

Family

ID=34928139

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05075830A Not-in-force EP1584382B1 (fr) 2004-04-09 2005-04-08 Méthode d'hydroformage d'une ébauche tubulaire en acier

Country Status (5)

Country Link
US (1) US20050223768A1 (fr)
EP (1) EP1584382B1 (fr)
AT (1) ATE399606T1 (fr)
DE (1) DE602005007790D1 (fr)
ES (1) ES2305998T3 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9194512B2 (en) 2007-04-30 2015-11-24 Mark Andreychuk Coiled tubing with heat resistant conduit
US8567657B2 (en) * 2007-04-30 2013-10-29 Mtj Consulting Services Inc. Coiled tubing with retainer for conduit
US8210544B2 (en) * 2008-05-16 2012-07-03 Honeywell International Inc. Apparatus for preventing incorrect installation of machinery components together

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE560341C (de) * 1929-05-23 1932-10-01 Youngstown Sheet And Tube Co Verfahren zur Herstellung von Rohren durch Biegen von Blechstreifen
SU431934A1 (fr) * 1958-03-13 1974-06-15
GB1529061A (en) * 1976-06-23 1978-10-18 British Petroleum Co Forming process
US4269053A (en) * 1979-07-25 1981-05-26 Rockwell International Corporation Method of superplastic forming using release coatings with different coefficients of friction
JPH07178460A (ja) * 1993-12-22 1995-07-18 Nippon Steel Corp 形状凍結性に優れた高強度亜鉛めっき鋼板の曲げ加工方法
US5686194A (en) * 1994-02-07 1997-11-11 Toyo Kohan Co., Ltd. Resin film laminated steel for can by dry forming
US5431326A (en) * 1994-09-07 1995-07-11 General Motors Corporation Method of forming a tubular member with separate flange
US5941110A (en) * 1997-05-12 1999-08-24 Northern University Adaptive method and apparatus for forming tailor welded blanks
US6224992B1 (en) * 1998-02-12 2001-05-01 Alcoa Inc. Composite body panel and vehicle incorporating same
US6182487B1 (en) * 1998-02-18 2001-02-06 Nippon Sanso Corporation Metal vessel and a fabrication method for the same
US6265492B1 (en) * 1998-06-15 2001-07-24 E. I. Du Pont De Nemours And Company Melt-fabricable polytetrafluoroethylene
KR100662164B1 (ko) * 1999-05-07 2006-12-27 마츠시타 덴끼 산교 가부시키가이샤 각형 전지캔 및 그 제조방법
JP2002035854A (ja) * 2000-07-27 2002-02-05 Nippon Steel Corp ハイドロフォーム加工性に優れた鋼管及びその製造方法
EP1401596B1 (fr) * 2001-07-05 2007-04-11 Magna Structural Systems Inc. Procede d'expansion d'une ebauche tubulaire
DE10210156A1 (de) * 2002-03-07 2003-09-25 Bayerische Motoren Werke Ag Verfahren zur Herstellung eines Rohres und Strukturkomponente, die aus einem solchen Rohr hergestellt ist

Also Published As

Publication number Publication date
EP1584382A1 (fr) 2005-10-12
ATE399606T1 (de) 2008-07-15
ES2305998T3 (es) 2008-11-01
DE602005007790D1 (de) 2008-08-14
US20050223768A1 (en) 2005-10-13

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