EP1586390A1 - Ebauche tubulaire et procédé de fabrication d'une ébauche tubulaire - Google Patents

Ebauche tubulaire et procédé de fabrication d'une ébauche tubulaire Download PDF

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Publication number
EP1586390A1
EP1586390A1 EP04076101A EP04076101A EP1586390A1 EP 1586390 A1 EP1586390 A1 EP 1586390A1 EP 04076101 A EP04076101 A EP 04076101A EP 04076101 A EP04076101 A EP 04076101A EP 1586390 A1 EP1586390 A1 EP 1586390A1
Authority
EP
European Patent Office
Prior art keywords
blank
tubular blank
tubular
flange
edge
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.)
Withdrawn
Application number
EP04076101A
Other languages
German (de)
English (en)
Inventor
Maurice Gerardus Maria Van Giezen
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 EP04076101A priority Critical patent/EP1586390A1/fr
Priority to EP05075850A priority patent/EP1586391A1/fr
Publication of EP1586390A1 publication Critical patent/EP1586390A1/fr
Withdrawn legal-status Critical Current

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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
    • B21C37/08—Making tubes with welded or soldered seams
    • B21C37/0803—Making tubes with welded or soldered seams the tubes having a special shape, e.g. polygonal tubes
    • 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
    • B21C37/065—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 starting from a specific blank, e.g. tailored blank
    • 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
    • B21C37/155—Making tubes with non circular section

Definitions

  • the invention relates to a tubular blank and a process for producing a tubular blank.
  • the invention further relates to an automotive structural component comprising such a tubular blank.
  • Tubular blanks are known and are regularly applied in various products, e.g. for structures in the automotive industry.
  • Such tubular blanks can be produced from substantially planar sheets or blanks of metal, e.g. steel that is formed to arrive at the tubular blank.
  • the tubular blanks may comprise tubes with a circular cross-section, but these tubular blanks may have other cross-sections as well, such triangular or square.
  • the cross-section of the tubular blank may vary along its length, such as in a conical tube.
  • Tubular blanks are often used when the shape of the tube has to be changed, which is often done by using a method known as hydro-forming.
  • hydro-forming the wall of a section of tube is pressed against a shaped part or die under the influence of, for example, water pressure inside the tube.
  • the hydro-forming technique is generally known and therefore requires no further explanation here. In this way, it is possible to make numerous very complicated shapes, which are used in engineering, for example in the automotive industry.
  • Hydro-formed tubular blanks are typically attached to other parts to obtain a particular construction, such as the body of a car.
  • the tubular blanks are (spot) welded to such other parts.
  • tubular blank formed from a substantially planar blank, welded along a seam, wherein the tubular blank has a flange that extends in a direction away from said tubular blank, the flange being integral part of the planar blank.
  • the planar blank can be formed such that the flange is obtained, extending from the welded seam.
  • the forming of the planar blank in this way results in a flange with a thickness of only once the thickness of the planar blank.
  • the flange can be used to facilitate attachment of the tubular blank to other parts, such as construction parts of a car.
  • the seam has been laser welded.
  • the laser-welded seam provides a strong connection at the seam, such that the tubular blank can be changed in shape afterwards.
  • the length and/or the direction of the flange varies along the length of the tubular blank.
  • the flange can be present where it is needed.
  • the substantially planar blank can be a tailored blank when this is desired for the construction part to be formed.
  • tubular blank with flange has been mechanically or hydraulically deformed, such as by bending or hydro-forming.
  • the invention further relates to an automotive structural blank comprising a tubular blank as described above.
  • the tubular blank may e.g. form the A-pillar of a cabriolet, wherein the flange is applied to attach construction parts and/or sealing rubbers.
  • the invention also relates to a process for producing a tubular blank wherein said process comprises the steps of:
  • the tubular blank comprises the extended part or flange prior to hydro-forming or other forming. Further a relatively thin flange is obtained. This is a relatively simple and cost-effective way to provide a tubular blank with a flange, since the flange is formed while the tubular blank is formed, and the flange does not have to be attached to the tube afterwards.
  • a substantially planar blank or sheet 1 of metal e.g. steel, comprises a first edge 2 and a second edge 3 is shown.
  • the blank 1 is drawn in two dimensions only, it should be appreciated that the blank 1 has a thickness suitable for the process of the invention.
  • the thickness of the blank 1 may e.g. be in the range of 0,5 - 5,0 mm, e.g. 1,5 mm.
  • the planar blank 1 is formed, indicated by the arrow A, such that the first edge 2 is brought in proximity to the blank at an imaginary line I at a distance D from the second edge 3.
  • the second edge 3 should not necessarily run parallel to the line I, making the distance D variable for a single blank 1.
  • the distance D can be chosen freely over the length of the edge 3.
  • Figs. 2A - 2C respectively illustrate possible cross-sections along line C - C of a circle-cylindrical tubular blank 6, a square tubular blank 6 and a triangular tubular blank 6, each having a flange 5 at a seam 4 in a direction P away from the tubular blank 6. It should be appreciated that the flange 5 may build an angle with (the surface of) the tubular blank 6, that is different from that shown in Figs. 2A - 2C.
  • Figs. 3, 4 and 5 show the tubular blank 6 of Fig. 2A in cross-section along the axis 8, with several variations for the flange 5. It should be appreciated that such variations can also be applied for other tubular blanks 6, such as those illustrated in Figs. 2B and 2C.
  • the length L of the flange 5 varies along the length of the tubular blank 6. In this way the flange 5 can be provided only on locations on the tubular blank 6 where other parts are to be attached. Accordingly the flange 5 is omitted at other locations on the blank 6 where it is not required.
  • Fig. 4 the flange 5 is only present along a part of the length of the tubular blank.
  • the planar blank 1 of Fig. 1 may be pre-formed to obtain the flange 5 at a pre-determined location.
  • Fig. 5 the direction P of the flange 5 varies along the length of the tubular blank, wherein the flange 5 spirals over the surface of the tubular blank 6.
  • This embodiment may e.g. be obtained by forming the substantially planar blank 1 in a spiral wise fashion.
  • the planar blank 1 may e.g. be formed to obtain a tubular blank 6 enclosing a volume with a varying diameter, such as a conical volume.
  • the length L of the flange 5 may vary contrary to the diameter of the tubular blank 6. This is shown in Fig. 6.
  • tubular blanks produced by the process described above are preferably modified by hydro-formation to arrive at a blank with a suitable shape that comprises a flange 5.
  • Such tubular blanks may e.g. be used in the automotive industry, such as the A-pillar of a cabriolet.
  • the flange 5 of the tubular blank can be used to attach further components to the blank, such as strengthening parts or sealing rubbers.
EP04076101A 2004-04-13 2004-04-13 Ebauche tubulaire et procédé de fabrication d'une ébauche tubulaire Withdrawn EP1586390A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP04076101A EP1586390A1 (fr) 2004-04-13 2004-04-13 Ebauche tubulaire et procédé de fabrication d'une ébauche tubulaire
EP05075850A EP1586391A1 (fr) 2004-04-13 2005-04-13 Ebauche tubulaire et procédé de fabrication d'une ébauche tubulaire

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP04076101A EP1586390A1 (fr) 2004-04-13 2004-04-13 Ebauche tubulaire et procédé de fabrication d'une ébauche tubulaire

Publications (1)

Publication Number Publication Date
EP1586390A1 true EP1586390A1 (fr) 2005-10-19

Family

ID=34928140

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04076101A Withdrawn EP1586390A1 (fr) 2004-04-13 2004-04-13 Ebauche tubulaire et procédé de fabrication d'une ébauche tubulaire

Country Status (1)

Country Link
EP (1) EP1586390A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1700645A1 (fr) * 2005-03-11 2006-09-13 Muhr und Bender KG Tuyaux avec bride integrée, notamment d'un matériau laminé flexiblement, pour des éléments de structure de châssis et de carrosserie

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1608905A (en) * 1924-06-18 1926-11-30 Joseph B Murray Heat-conducting tube and method of making the same
US4732819A (en) * 1983-05-07 1988-03-22 Honda Giken Kogyo Kabushiki Kaisha Light-weight vehicle frame structure
DE4141867A1 (de) * 1991-12-18 1993-06-24 Welser Ohg Josef Verfahren zum herstellen eines hohlprofils aus metallband
WO1998024569A1 (fr) * 1996-12-03 1998-06-11 Elpatronic Ag Procede pour la fabrication d'une piece moulee, ainsi que piece moulee ainsi fabriquee
US5836189A (en) * 1996-02-07 1998-11-17 Benteler Ag Method of manufacturing a pipe having sections with different cross-sectional configurations
EP1172281A1 (fr) * 2000-07-14 2002-01-16 Benteler Ag Montant de porte, spécialement montant "A", pour une structure de carrosserie de véhicule et méthode de construction

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1608905A (en) * 1924-06-18 1926-11-30 Joseph B Murray Heat-conducting tube and method of making the same
US4732819A (en) * 1983-05-07 1988-03-22 Honda Giken Kogyo Kabushiki Kaisha Light-weight vehicle frame structure
DE4141867A1 (de) * 1991-12-18 1993-06-24 Welser Ohg Josef Verfahren zum herstellen eines hohlprofils aus metallband
US5836189A (en) * 1996-02-07 1998-11-17 Benteler Ag Method of manufacturing a pipe having sections with different cross-sectional configurations
WO1998024569A1 (fr) * 1996-12-03 1998-06-11 Elpatronic Ag Procede pour la fabrication d'une piece moulee, ainsi que piece moulee ainsi fabriquee
EP1172281A1 (fr) * 2000-07-14 2002-01-16 Benteler Ag Montant de porte, spécialement montant "A", pour une structure de carrosserie de véhicule et méthode de construction

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1700645A1 (fr) * 2005-03-11 2006-09-13 Muhr und Bender KG Tuyaux avec bride integrée, notamment d'un matériau laminé flexiblement, pour des éléments de structure de châssis et de carrosserie

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