EP1000677A2 - Procédé pour former une pièce par application d'une pression intérieure élevée - Google Patents

Procédé pour former une pièce par application d'une pression intérieure élevée Download PDF

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Publication number
EP1000677A2
EP1000677A2 EP99120812A EP99120812A EP1000677A2 EP 1000677 A2 EP1000677 A2 EP 1000677A2 EP 99120812 A EP99120812 A EP 99120812A EP 99120812 A EP99120812 A EP 99120812A EP 1000677 A2 EP1000677 A2 EP 1000677A2
Authority
EP
European Patent Office
Prior art keywords
pipe
section
wall thickness
tube
sections
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
EP99120812A
Other languages
German (de)
English (en)
Other versions
EP1000677B1 (fr
EP1000677A3 (fr
Inventor
Conrad Dipl.-Ing. Oehlerking
Frank Dr. Welsch
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.)
Volkswagen AG
Original Assignee
Volkswagen AG
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 Volkswagen AG filed Critical Volkswagen AG
Publication of EP1000677A2 publication Critical patent/EP1000677A2/fr
Publication of EP1000677A3 publication Critical patent/EP1000677A3/fr
Application granted granted Critical
Publication of EP1000677B1 publication Critical patent/EP1000677B1/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
    • 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
    • B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
    • B21D26/033—Deforming tubular bodies
    • B21D26/051—Deforming double-walled bodies
    • 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
    • B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
    • B21D39/04—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of tubes with tubes; of tubes with rods

Definitions

  • the present invention relates to a method for producing a component by means of Hydroforming from a tube with at least one section different wall thickness.
  • the present invention also relates to such a tube.
  • IHU hydroforming process
  • DE 196 04 357 A1 describes a method for producing pipes with sections different wall thickness known from an initially flat sheet, in which First a targeted rolling deformation of the sheet in the rolling direction changing sheet thicknesses in certain areas. This results in one targeted partial wall thickness reduction. Then the rolled sheet cut, formed into a tube and joined along the butt edges. A such manufacturing with continuous material in a manufacturing process, however complex and costly.
  • EP 0 733 540 B1 describes a method for producing a hollow profile for a Carrier structure of a motor vehicle by hydraulic expansion of a Output part, an extrusion profile being used as the output part, which in Cross section has areas with different wall thicknesses.
  • the wall thickness of the The starting part is chosen so that the hydroforming process manufactured hollow profile has the necessary wall thickness at the required points.
  • the disadvantage of this is that for different hollow profiles with different wall thicknesses separate extruded profiles must be produced as the starting product each time.
  • the object of the present invention is therefore a method of the above to provide the type mentioned, in which the wall thickness gradation is as simple as possible Way is achievable.
  • the solution is that a composite pipe is used, with on an inner tube with a uniform wall thickness to produce the at least one Section of different wall thickness at least one outer tube section is postponed and that the assembled tube the hydroforming process is subjected so that the parts are fixed by the molding process be connected to each other.
  • the gradation of the wall thickness is provided To achieve stacking of pipe sections.
  • This compound Semi-finished products are then shaped as usual in the IHU tool.
  • the outer diameter of the inner tube is equal to the dimension of the outer tube brought so that both parts are connected by the shape.
  • the length of the resulting component results from the length of the inner tube.
  • the outer pipe section or the outer pipe sections produce the thickening. This ensures that the pressure medium during the hydroforming process does not get between the tubes and a common forming is guaranteed.
  • a particularly advantageous development provides that at least one end of a outer tube section is designed obliquely in cross section, so that after Hydroforming process a substantially paragraph-free outer contour of the finished component results.
  • the outer contour then requires no post-processing in order sand off any paragraphs or joints or in a comparable manner postprocess.
  • one or more can additional connections between the inner tube and the at least one outer Pipe section are produced, for example by laser welding or others Joining techniques. This ensures that the assembled semi-finished product in the IHU tool not slipped.
  • These additional connections can, for example, after the forming process are produced in that the resulting component with a or several other components is connected.
  • a composite tube 10 which consists of an inner tube 11 and an outer tube section 12.
  • the inner tube 11 has the required component length.
  • the outer tube section 12 is in the manner of a sleeve completely pushed over the inner tube 11 so that it has a central region 11b covered and the outer areas 11a remain uncovered.
  • On the outer edges 13 and 14 of the outer tube section 12 are inward slopes 15, 16 provided.
  • the inner tube 11 and the outer tube section 12 consist for example of a Sheet steel, which is formed into a tube and joined at the butt edges.
  • the Assembled tube 10 is a hydroforming process in the usual way subjected.
  • the resulting component 20 is schematic in FIG. 1b shown.
  • the component 20 consists of outer regions 21 which consist of the Inner tube 11 emerged and correspond to the region 11a designated in FIG. 1a and a thickened region 22, which consists of the region designated by 11b in FIG. 1a of the inner tube and the outer tube section 12 emerged.
  • the outer contour of the Component 20 has no shoulders because the wall of the former inner tube perfectly to the oblique contour 15, 16 of the outer tube section 12 nestled.
  • connection points e.g. B. can be further solidified by laser welding or by other joining techniques.
  • This Connection points can be made before or after the forming process. There then created the connection points after the forming process, they can are generated that the component 20 with one or more any other Components is connected.
  • FIG. 2a shows a further exemplary embodiment of a composite tube 30 shown schematically and partially cut.
  • the composite pipe 30 consists of an inner tube 31 and three outer tube sections 32, 33, 34, which are partially are pushed onto one another on the inner tube 31, so that an outer region 31a of the Inner tube 31 and the outer free ends 32a, 33a, 33b of the outer tube sections 32, 33, 34 remain uncovered.
  • the outer free ends 32a 33a and 34a of the outer Pipe sections 32, 33, 34 in turn have an inward bevel 32b, 33b, 34b.
  • the composite pipe 30 becomes a common one Subjected to hydroforming process.
  • the resulting component 40 is schematic and partially cut in FIG. 2b shown.
  • the component 40 has a thin region 41 which emerges from the outer Region 31a of inner tube 31 results, as well as gradually thickened regions, namely a single thickened area 42, a double thickened area 43 and one triple thickened area 44.
  • the thickened areas 42, 43, 44 result from the Addition of the wall thicknesses of the different outer ones partially pushed over each other Pipe sections 32, 33, 34.
  • the design of the outer free ensures Ends 32a, 33a, 34a of the outer tube sections 32, 33, 34 have a shoulder-free contour.
  • connection points between the inner tube 31 and the outer tube sections 32, 33, 34 are produced. However, these parts are already fixed by the shape connected with each other.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)
  • Body Structure For Vehicles (AREA)
  • Powder Metallurgy (AREA)
EP99120812A 1998-11-09 1999-10-21 Procédé pour former une pièce par application d'une pression intérieure élevée Expired - Lifetime EP1000677B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19851492 1998-11-09
DE19851492A DE19851492A1 (de) 1998-11-09 1998-11-09 Verfahren zum Herstellen eines Bauteils mittels Innenhochdruck-Umformen

Publications (3)

Publication Number Publication Date
EP1000677A2 true EP1000677A2 (fr) 2000-05-17
EP1000677A3 EP1000677A3 (fr) 2001-04-25
EP1000677B1 EP1000677B1 (fr) 2004-02-18

Family

ID=7887103

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99120812A Expired - Lifetime EP1000677B1 (fr) 1998-11-09 1999-10-21 Procédé pour former une pièce par application d'une pression intérieure élevée

Country Status (3)

Country Link
EP (1) EP1000677B1 (fr)
AT (1) ATE259685T1 (fr)
DE (2) DE19851492A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001017709A1 (fr) * 1999-09-08 2001-03-15 Cosma International Inc. Elements obtenus par hydroformage et procedes de fabrication
WO2004004941A1 (fr) * 2002-07-05 2004-01-15 Daimlerchrysler Ag Procede et dispositif de fixation de composants sur des profiles creux de circonference fermee
EP1537921A1 (fr) * 2003-12-05 2005-06-08 Deutsches Zentrum für Luft- und Raumfahrt e.V. Méthode de fabrication d'un tube multicouche pour le guidage des fluides de transfer de chaleur et tube multicouche
DE102009032045A1 (de) * 2009-07-07 2011-01-20 Elb-Form Gmbh Doppelwandiges Rohr, Verfahren zu seiner Herstellung und seine Verwendung
CN113664064A (zh) * 2021-08-13 2021-11-19 山东钢铁集团日照有限公司 一种差厚管制管方法

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10221880B4 (de) * 2002-05-16 2007-03-15 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Verfahren zur Herstellung eines verstärkten Rohrs, ein solches Rohr und dessen Verwendung
GB2486224B8 (en) * 2010-12-07 2013-06-19 Europ Technical Ct Etc Steering Nsk Deutschland Gmbh Tailored thickness steering tube
DE102011113662A1 (de) * 2011-09-19 2013-03-21 Benteler Automobiltechnik Gmbh Strukturbauteil für ein Kraftfahrzeug mit einem hohlförmigen Grundprofil sowie Verfahren zu dessen Herstellung
CN121067148B (zh) * 2025-11-05 2026-03-20 长城汽车股份有限公司 一种变径管件的制备方法

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE548576C (de) * 1928-03-01 1933-02-03 Richard Krauss Dipl Ing Verfahren zur Herstellung von eisernen Hochdruckrohren
DE2709633C3 (de) * 1976-03-26 1981-04-23 Combustion Engineering, Inc., 06095 Windsor, Conn. Vorrichtung zum Befestigen einer Muffe in einer Rohrleitung
CA1139923A (fr) * 1979-02-28 1983-01-25 Toshio Yoshida Methode de production de canalisations composites multiparoi
JPS61266132A (ja) * 1985-05-21 1986-11-25 Musashi Seimitsu Ind Co Ltd 組立カムシヤフトの製造方法
US4759111A (en) * 1987-08-27 1988-07-26 Ti Automotive Division Of Ti Canada Inc. Method of forming reinforced box-selection frame members
DE19511970C2 (de) * 1995-04-18 1998-07-09 Werdau Fahrzeugwerk Verfahren zum Herstellen von verformten mehrwandigen Rohren mit Hohlräumen zwischen den Wandungen
DE19617219C2 (de) * 1996-04-30 1998-04-30 Daimler Benz Ag Verfahren zur Herstellung einer hohlen Welle

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001017709A1 (fr) * 1999-09-08 2001-03-15 Cosma International Inc. Elements obtenus par hydroformage et procedes de fabrication
WO2004004941A1 (fr) * 2002-07-05 2004-01-15 Daimlerchrysler Ag Procede et dispositif de fixation de composants sur des profiles creux de circonference fermee
EP1537921A1 (fr) * 2003-12-05 2005-06-08 Deutsches Zentrum für Luft- und Raumfahrt e.V. Méthode de fabrication d'un tube multicouche pour le guidage des fluides de transfer de chaleur et tube multicouche
DE102009032045A1 (de) * 2009-07-07 2011-01-20 Elb-Form Gmbh Doppelwandiges Rohr, Verfahren zu seiner Herstellung und seine Verwendung
CN113664064A (zh) * 2021-08-13 2021-11-19 山东钢铁集团日照有限公司 一种差厚管制管方法

Also Published As

Publication number Publication date
DE59908570D1 (de) 2004-03-25
EP1000677B1 (fr) 2004-02-18
EP1000677A3 (fr) 2001-04-25
ATE259685T1 (de) 2004-03-15
DE19851492A1 (de) 2000-05-11

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