EP1708832A1 - Procede pour produire un profile creux - Google Patents

Procede pour produire un profile creux

Info

Publication number
EP1708832A1
EP1708832A1 EP04797759A EP04797759A EP1708832A1 EP 1708832 A1 EP1708832 A1 EP 1708832A1 EP 04797759 A EP04797759 A EP 04797759A EP 04797759 A EP04797759 A EP 04797759A EP 1708832 A1 EP1708832 A1 EP 1708832A1
Authority
EP
European Patent Office
Prior art keywords
hollow profile
sheet
structural elements
high pressure
forming tool
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
EP04797759A
Other languages
German (de)
English (en)
Other versions
EP1708832B1 (fr
Inventor
Helmut Augustin
Stephan HÖFIG
Volker Thoms
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.)
Mercedes Benz Group AG
Original Assignee
DaimlerChrysler 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 DaimlerChrysler AG filed Critical DaimlerChrysler AG
Publication of EP1708832A1 publication Critical patent/EP1708832A1/fr
Application granted granted Critical
Publication of EP1708832B1 publication Critical patent/EP1708832B1/fr
Expired - Fee Related 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
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D51/00—Making hollow objects
    • B21D51/02—Making hollow objects characterised by the structure of the objects
    • B21D51/12—Making hollow objects characterised by the structure of the objects objects with corrugated walls
    • 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
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/20—Deep-drawing
    • B21D22/201—Work-pieces; preparation of the work-pieces, e.g. lubricating, coating
    • 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
    • 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
    • B21D26/021—Deforming sheet bodies
    • B21D26/031—Mould construction
    • 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
    • B21D26/053—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 characterised by the material of the blanks

Definitions

  • the present invention relates to a method for producing a hollow profile, in particular an internal high-pressure forming method, according to the preamble of claim 1.
  • the process of hydroforming serves to produce hollow or shell profiles, in particular from sheet metal.
  • a sheet metal blank is formed into a half-shell or two sheet metal blanks lying one on top of the other, which are welded at the edges, are expanded to form a hollow profile.
  • IHU internal high pressure forming
  • the achievable component geometry in the case of components formed by internal high pressure is largely determined by the maximum circumferential change which the component can experience during internal high pressure forming.
  • This maximum permissible change in circumference is in turn defined by the maximum elongation at break of the material used for the component and the position of the molding itself.
  • the maximum he determines Adequate shaping in hydroforming, on the one hand, by the maximum permissible change in circumference and, on the other hand, by the original scope of the starting material.
  • the dimension or diameter of the profiles or tubes is determined via the minimum component circumference in such a way that a plastic change in shape is achieved in all areas of the component during forming.
  • the invention relates to a method for producing a hollow profile, which is formed from at least one sheet by high pressure fluid. Before the shaping, the surface of the sheet is provided with structural elements in the form of depressions and / or elevations.
  • the number, the dimensions and the contours of the structural elements are specifically determined as a function of the properties to be achieved of the component to be produced, so that in the final application fluidic high pressure maintain the maximum permissible circumferential change for the component and the maximum shape is increased.
  • Such a ratio also permits hydroforming, in which the maximum shape is maintained, so that the change in circumference, if so desired, can be reduced.
  • the method according to the invention is distinguished by the advantage that an increase in the achievable shape of a component produced, for example, with IHU can make it more constructive in terms of its later use, in particular with regard to the stiffness and strength properties, for example in relation to the force absorption capacity, because in connection with the work hardening of the material due to the process of internal high pressure forming, such structured profiles are easier to realize.
  • the method according to the invention can be used, in particular, to produce carriers for the body of a motor vehicle which correspond to a high degree to the requirements of lightweight construction.
  • the contour of the structural elements in the form of depressions and / or elevations is optional.
  • During their manufacture which is accomplished, for example, by stamping or rolling the sheet metal surface, it only has to be ensured that the material stretching in the edge regions of the structural elements is kept to a minimum.
  • the insertion profile of the component to be formed that is to say the contour of the sheet, is therefore wel ches is inserted into the forming tool before expanding, equipped with an enlarged circumference due to the presence of structural elements.
  • This enlarged scope effectively provides a deformation reserve through a larger effective surface.
  • the novel design of the sheet with structural elements that is used also allows that when the sheet is inserted into the forming tool, at least some of the structural elements to the inside surface of the forming tool partially form cavities for receiving a lubricant, which keeps the friction between the inside surface and the sheet low , This also results in an increase in the maximum permissible change in circumference.
  • the structural elements may be desirable to maintain the structural elements in those regions of the component which are exposed to increased stress, which bring about increased rigidity in the finished component.
  • the structural elements become a hollow pro when the sheet is formed fil at least partially retained on the surface of the sheet, which can be achieved by appropriate contouring of the inner surface of the forming tool.
  • FIG. 1 shows an example of the section of a sheet which is to be used in the method according to the invention.
  • the sheet 1 has a number of structural elements 2 distributed uniformly in the form of elevations or bulges.
  • the sheet 1 is then subsequently bent to form, for example, a rotationally symmetrical tubular hollow semi-finished product and welded to the butt surfaces along a longitudinal seam to form this hollow profile semi-finished product, so that structural elements 2 in the form of such bulges are provided over the entire circumference of the hollow profile semi-finished product.
  • the structural elements 2 are in particular circularly symmetrical, so that the material stretching in the edge region of the bulges 2 is kept to a minimum.
  • the hollow profile semi-finished product is then expanded to the hollow profile by means of internal high pressure in an internal high pressure forming tool.
  • the hollow profile from two sheets 1, these first being placed one on top of the other and then clamped in an internal high-pressure forming tool. Then, a pressure fluid is introduced between the sheets 1, which is expanded by the application of an internal high pressure by means of the pressure fluid and expanded to the hollow profile become .
  • the hollow profile semi-finished product is formed into a hollow profile after the longitudinal seam welding in an external high-pressure forming tool by the interaction of a fluidic high pressure directed inwards from the outside with a die introduced into the interior of the hollow profile semi-finished product, the semi-finished product being true to contour is pressed onto the die, which forms the shape and contour of the hollow profile.
  • the metal sheets 1, the deformation of which leads to the desired hollow profile, have structural elements 2 in the form of bulges.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)

Abstract

La présente invention concerne un procédé pour produire un profilé creux en utilisant un procédé de formage à haute pression fluidique. Selon ce procédé, une tôle est pourvue de manière ciblée, à sa surface, d'éléments structurels (2) qui augmentent le moulage maximal du composant lors d'un formage sous haute pression ultérieur.
EP04797759A 2003-12-06 2004-11-10 Procede pour produire un profile creux Expired - Fee Related EP1708832B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2003157119 DE10357119B4 (de) 2003-12-06 2003-12-06 Verfahren zur Herstellung eine Hohlprofils
PCT/EP2004/012692 WO2005053871A1 (fr) 2003-12-06 2004-11-10 Procede pour produire un profile creux

Publications (2)

Publication Number Publication Date
EP1708832A1 true EP1708832A1 (fr) 2006-10-11
EP1708832B1 EP1708832B1 (fr) 2007-09-05

Family

ID=34638451

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04797759A Expired - Fee Related EP1708832B1 (fr) 2003-12-06 2004-11-10 Procede pour produire un profile creux

Country Status (4)

Country Link
EP (1) EP1708832B1 (fr)
CA (1) CA2548271A1 (fr)
DE (2) DE10357119B4 (fr)
WO (1) WO2005053871A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008018656B9 (de) * 2008-04-11 2009-07-09 Thyssenkrupp Steel Ag Verfahren zur Herstellung von hochmaßhaltigen Halbschalen
DE102009050277A1 (de) * 2009-10-21 2011-05-19 Lothar Walther Verwaltungsgesellschaft Mbh & Co. Kg Verfahren zur Erzeugung eines Innenprofils an der Innenwandung eines Hohlraumbereiches, insbesondere hohlzylindrischen Bereiches eines Halbzeuges, insbesondere Rohres und Verwendung eines Verfahrens zur Herstellung eines Laufes für Schusswaffen
DE102021213010B4 (de) 2021-11-18 2023-06-15 Ipu Ingenieurgesellschaft Braunschweig Mbh Verfahren zur formwerkzeugfreien Herstellung eines reliefierten Bauteils und reliefiertes Bauteil
US11982200B1 (en) 2023-06-23 2024-05-14 Pratt & Whitney Canada Corp. Structure with structural reinforcement patterns

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4761982A (en) * 1986-10-01 1988-08-09 General Motors Corporation Method and apparatus for forming a heat exchanger turbulator and tube
US4840053A (en) * 1987-07-29 1989-06-20 Mitsui & Co., Ltd. Method for manufacturing a pipe with projections
DE4419652A1 (de) * 1994-06-04 1995-12-07 Meckenstock H W Kg Plattenförmiges Formelement
DE19803782B4 (de) * 1998-01-22 2005-06-16 Hellwig, Udo, Prof. Dr. Verfahren und Vorrichtung zur Formgebung von Körpern durch eine Nebenformen bildende Umgestaltung
DE10104860C1 (de) * 2001-02-03 2002-02-07 Daimler Chrysler Ag Verfahren zur Herstellung eines Hohlprofiles aus zwei aufeinanderliegenden Platinen

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2005053871A1 *

Also Published As

Publication number Publication date
DE502004004916D1 (de) 2007-10-18
CA2548271A1 (fr) 2005-06-16
EP1708832B1 (fr) 2007-09-05
DE10357119A1 (de) 2005-07-14
WO2005053871A1 (fr) 2005-06-16
DE10357119B4 (de) 2005-11-24

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