EP1708832B1 - Procede pour produire un profile creux - Google Patents

Procede pour produire un profile creux Download PDF

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Publication number
EP1708832B1
EP1708832B1 EP04797759A EP04797759A EP1708832B1 EP 1708832 B1 EP1708832 B1 EP 1708832B1 EP 04797759 A EP04797759 A EP 04797759A EP 04797759 A EP04797759 A EP 04797759A EP 1708832 B1 EP1708832 B1 EP 1708832B1
Authority
EP
European Patent Office
Prior art keywords
profiled section
metal sheet
hollow profiled
forming tool
process according
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.)
Expired - Fee Related
Application number
EP04797759A
Other languages
German (de)
English (en)
Other versions
EP1708832A1 (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

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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
    • 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 a hydroforming method, according to the preamble of claim 1.
  • the method 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 on the edge side, are widened to form a hollow profile.
  • IHU hydroforming
  • a hydroforming method is known in which two superimposed sheets are clamped between two hold-downs, which are spaced apart from each other to form a Aufweitraumes.
  • the expansion space is bounded above and below by two matrices.
  • a fluidic internal high pressure is introduced, which widen the sheets.
  • the dies are at different distances from the double sheet with the sheet furthest from the opposite die having warps. These vaults form a reserve of material through which the sheet metal is the larger Reshape can withstand damage.
  • the bulges are smoothed out by the internal high pressure for complete deformation of the sheet.
  • the achievable component geometry in components formed by internal high pressure is largely determined by the maximum change in circumference which the component can undergo during hydroforming.
  • This maximum permissible circumferential change in turn is defined by the maximum elongation at break of the material used for the component and the position of the molding itself. In other words, determines the maximum achievable shape 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 the diameter of the profiles or tubes over the minimum component circumference is set such that in all areas of the component during the forming a plastic deformation is achieved.
  • the invention relates to a method for producing a hollow profile, wherein this is formed from at least one sheet by fluidic high pressure. Before the Forming the surface of the sheet is provided with structural elements in the form of depressions and / or elevations.
  • the number, dimensions and contours of the structural elements are specifically determined depending on the properties to be achieved of the component to be produced, so that the maximum permissible circumferential change for the component is maintained during the final pressurization with fluidic high pressure and the maximum shape is increased.
  • Such a relationship also permits hydroforming in which the maximum molding is maintained so that the circumferential change can be reduced if desired.
  • 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 hydroforming can make it structurally more favorable with regard to its subsequent use, in particular with regard to the stiffness and strength properties, for example in relation to the force absorption capability. since such structured profiles are easier to implement in connection with the work hardening of the material during hydroforming.
  • contour of the structural elements in the form of recesses and / or elevations is in principle optional. In their manufacture, which is accomplished for example by embossing or rolling the sheet surface, only needs to be ensured be that the material stretch is minimized in the edge regions of the structural elements.
  • the insertion profile of the component to be reshaped that is, the contour of the sheet, which is inserted into the forming tool prior to expansion, equipped by the presence of structural elements with an enlarged scope.
  • This increased size provides a deformation reserve through a larger effective surface.
  • the novel design of the sheet used with structural elements also allows that when inserting the sheet into the forming at least some of the structural elements to the inner surface of the forming partially form cavities for receiving a lubricant, which keeps the friction between the inner 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 areas of the component which are exposed to increased stress, which effect increased rigidity in the finished component.
  • FIG. 1 shows by way of example the section of a sheet which is to be used in the method according to the invention.
  • the sheet 1 has evenly distributed a plurality of structural elements 2 in the form of elevations or bulges.
  • the metal sheet 1 is then subsequently bent to form, for example, a rotationally symmetrical tubular hollow profile semi-finished product and welded to the abutting 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 designed in particular circularly symmetrical, so that the material stretch in the edge region of the curvatures 2 is minimized.
  • the hollow profile semifinished product is expanded by means of internal high pressure in a hydroforming forming tool for hollow profile.
  • the hollow profile semi-finished product after longitudinal seam welding in an external high-pressure forming tool formed by cooperation of a directed from outside to inside fluidic high pressure with a introduced into the interior of the hollow profile semi-finished die to the hollow profile, wherein the semi-finished contoured to the die, which forms the hollow profile in shape and contour is pressed.

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.

Claims (6)

  1. Procédé de fabrication d'un profilé creux formé d'au moins une tôle (1) au moyen d'une haute pression hydraulique, dans lequel avant la déformation de la tôle (1), la surface de la tôle (1) est dotée d'éléments structurels (2) qui présentent la forme de creux et/ou de ressauts, le nombre, les dimensions et les contours des éléments structurels (2) étant sélectionnés de telle sorte que lors de l'évasement, la modification maximale admissible de la périphérie du composant est respectée et la déformation maximale est augmentée,
    caractérisé en ce que lorsque la ou les tôles (1) sont placées dans l'outil de déformation, certains éléments structurels (2) forment par rapport à la surface intérieure de l'outil de déformation des creux destinés à recevoir un lubrifiant.
  2. Procédé selon la revendication 1, caractérisé en ce que la tôle (1) est cintrée en un produit semi-fini de profilé tubulaire creux, est ensuite soudée par un cordon longitudinal et enfin évasée en le profilé creux dans un outil de déformation sous haute pression intérieure au moyen d'une haute pression intérieure.
  3. Procédé selon la revendication 1, caractérisé en ce deux tôles (1) sont superposées et serrées dans un outil de déformation sous haute pression intérieure, suite à quoi un fluide sous pression est injecté entre les tôles (1) et en ce qu'après l'application d'une haute pression intérieure au moyen du fluide sous pression, les tôles (1) sont écartées l'une de l'autre et évasées pour former le profilé creux.
  4. Procédé selon la revendication 1, caractérisé en ce que la tôle (1) est cintrée en un produit semi-fini de profilé tubulaire creux et ensuite soudée le long d'un cordon longitudinal et en ce que le produit semi-fini en profilé creux est déformé dans un outil de déformation sous haute pression extérieure par coopération entre une haute pression hydraulique orientée de l'extérieur vers l'intérieur et une matrice insérée à l'intérieur du produit semi-fini en profilé creux, pour obtenir le profilé creux.
  5. Procédé selon l'une des revendications 1 à 4, caractérisé en ce que certains éléments structurels (2) sont conservés à la surface de la tôle (1) lors de la déformation en le profilé creux.
  6. Procédé selon l'une des revendications précédentes, caractérisé en ce que les éléments structurels (2) sont emboutis ou laminés sur la surface de la tôle (1).
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 EP1708832A1 (fr) 2006-10-11
EP1708832B1 true 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)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008018656B3 (de) * 2008-04-11 2009-03-12 Thyssenkrupp Steel Ag Verfahren zur Herstellung von hochmaßhaltigen Halbschalen
US11982200B1 (en) 2023-06-23 2024-05-14 Pratt & Whitney Canada Corp. Structure with structural reinforcement patterns

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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

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

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008018656B3 (de) * 2008-04-11 2009-03-12 Thyssenkrupp Steel Ag Verfahren zur Herstellung von hochmaßhaltigen Halbschalen
DE102008018656B9 (de) * 2008-04-11 2009-07-09 Thyssenkrupp Steel Ag Verfahren zur Herstellung von hochmaßhaltigen Halbschalen
EP2108467A2 (fr) 2008-04-11 2009-10-14 ThyssenKrupp Steel AG Procédé de fabrication de demi-coques de dimensions très précises
US11982200B1 (en) 2023-06-23 2024-05-14 Pratt & Whitney Canada Corp. Structure with structural reinforcement patterns

Also Published As

Publication number Publication date
DE10357119B4 (de) 2005-11-24
WO2005053871A1 (fr) 2005-06-16
DE502004004916D1 (de) 2007-10-18
CA2548271A1 (fr) 2005-06-16
EP1708832A1 (fr) 2006-10-11
DE10357119A1 (de) 2005-07-14

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