EP0906799B1 - Blank for a structural member and method of manufacturing such a structural member for motor vehicles - Google Patents

Blank for a structural member and method of manufacturing such a structural member for motor vehicles Download PDF

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Publication number
EP0906799B1
EP0906799B1 EP98116748A EP98116748A EP0906799B1 EP 0906799 B1 EP0906799 B1 EP 0906799B1 EP 98116748 A EP98116748 A EP 98116748A EP 98116748 A EP98116748 A EP 98116748A EP 0906799 B1 EP0906799 B1 EP 0906799B1
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EP
European Patent Office
Prior art keywords
plate
metal reinforcing
process according
reinforcing sheet
sheet
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 - Lifetime
Application number
EP98116748A
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German (de)
French (fr)
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EP0906799A1 (en
Inventor
Conrad Dipl.-Ing. Oehlerking
Frank Dr. Welsch
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Volkswagen AG
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Volkswagen AG
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Publication date
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Publication of EP0906799A1 publication Critical patent/EP0906799A1/en
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    • 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
    • B21D49/00—Sheathing or stiffening objects
    • 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
    • B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
    • B21D39/03—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of sheet metal otherwise than by folding

Definitions

  • the invention relates to a method according to the preamble of patent claim 1.
  • a generic method is known from DE 43 07 563 C2.
  • a circuit board Has base plate and at least one reinforcing plate that the base plate at least partially covered and e.g. by spot welding, adhesive or Welds is connected to the base plate.
  • This board is then subjected to a forming process in which it is brought into a desired shape.
  • the problem here is that the base plate and the reinforcing plate in the joint forming process are stretched and compressed differently.
  • the reinforcement plate at a bend in which it is on the Sits inside with a smaller radius of curvature, more compressed and at one Bend where it sits on the outside stretched more while the base plate is respectively stretched or compressed in reverse.
  • the tendency to either form wrinkles during compression and cracking Elongation since the two sheets mutually as it were during the forming process "hinder". This results in a deterioration in the material properties of the Structural component.
  • EP-A 0 672 477 is indeed a forming process for pressing sheet metal parts known at the exit a sheet metal board with a regular matrix of local Deformations, for example regular surveys. These deformations are intended to achieve relatively high degrees of deformation of the sheet metal part ensure without the need for deep drawing; instead one should cheaper molding tool can be used. With those envisaged there However, sheet metal parts are not made of two firmly connected Sheet metal existing boards, as in the invention, but, as I said, um Single sheets, in the forming of which the mutual disability mentioned is not occurs.
  • the invention is therefore based on the object of a generic method of this type To design and develop that wrinkling and cracking in the board kept low during the forming process and yet a low overall weight is observed.
  • a deformation reserve in the reinforcing plate can result in a greater elongation of the reinforcement sheet by smoothing it without one Material thinning can be achieved.
  • the deformation reserve can in particular have a higher effective surface and e.g. through different structuring in the reinforcement plate are formed.
  • the reinforcement plate is compressed thereby also absorbed by the deformation reserve, e.g. the vault structure one locally bulges, without wrinkles being formed in the reinforcing plate become a preferred kinking of the structural component along some lines to lead.
  • a circuit board 4 has a base plate 2 on which a reinforcing plate 1 is attached. On the reinforcement plate are in predetermined areas Deformation reserves 3 formed, the higher effective due to structuring Have surface than other areas of the reinforcement plate or the base plate 2.
  • FIG. 1 shows a reinforcing plate 1 designed as a waffle plate
  • FIG. 2 shows a reinforcing plate 1 designed as a scale plate
  • 3 is a Reinforcement plate 1 shown, which is designed as a vaulted structured sheet.
  • the Waffle plate shows pyramid-like elevations and the scale plate elongated Elevations, which are separated from each other by webs; but there are also appropriate training possible, in which the respective surveys without such Adjacent webs directly and / or have additional depressions.
  • arched sheet metal directly limit the elevations without webs to each other.
  • the reinforcement plate 1 shown in FIGS. 1 to 3 is now according to FIG. 4 before joint forming with the base plate at least partially with the base plate connected. This can be done, for example, using an appropriate spot welding technique, Laser welding technology or adhesive technology, possibly combinations of these techniques respectively. It is advantageous if in the area between the base plate and the Reinforcement plate 1 appropriate corrosion protection measures are carried out. In Depends on where the structural component generated is used on a motor vehicle the structural component can also be a relatively large base plate and arranged thereon have a plurality of reinforcement plates 1.
  • the areas with ridges and depressions are smoothed without a larger material flow must take place or a larger material thinning in the Area takes place. Furthermore, the ridges and valleys in a compression compressed or enlarged without forming larger crease lines that lead to a Weaken the material.
  • the reinforcement plate 1 shown in FIGS. 1 to 3 can be used in different areas also a different, but then certain material thickness in the respective areas have so that when forming the reinforcing plate 1 to produce the Structural component in these areas then an optimal material flow or an optimal Material expansion can take place. This can be caused by certain steels or materials are supported, especially if the base plate and the reinforcement plate 1 each have a certain structure.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Structure Of Printed Boards (AREA)
  • Body Structure For Vehicles (AREA)

Description

Die Erfindung betrifft ein Verfahren gemäß dem Oberbegriff des Patentanspruchs 1.The invention relates to a method according to the preamble of patent claim 1.

Ein gattungsgemäßes Verfahren ist aus der DE 43 07 563 C2 bekannt. Bei der Herstellung derartiger Strukturbauteile wird zunächst eine Platine geschaffen, die ein Grundblech und mindestens ein Verstärkungsblech aufweist, das das Grundblech zumindest teilweise bedeckt und z.B. durch Punktschweißungen, Klebemittel oder Verschweißungen mit dem Grundblech verbunden ist. Diese Platine wird anschließend einem Umformvorgang unterworfen, bei dem sie in eine gewünschte Form gebracht wird.A generic method is known from DE 43 07 563 C2. In the Manufacture of such structural components is first created a circuit board Has base plate and at least one reinforcing plate that the base plate at least partially covered and e.g. by spot welding, adhesive or Welds is connected to the base plate. This board is then subjected to a forming process in which it is brought into a desired shape.

Problematisch ist dabei, daß das Grundblech und das Verstärkungsblech bei dem gemeinsamen Umformvorgang unterschiedlich gedehnt und gestaucht werden. Dabei wird insbesondere das Verstärkungsblech bei einer Biegung, bei der es auf der Innenseite mit kleinerem Krümmungsradius sitzt, stärker gestaucht und bei einer Biegung, bei der es auf der Außenseite sitzt, stärker gedehnt, während das Grundblech entsprechend jeweils umgekehrt gedehnt bzw. gestaucht wird. Somit besteht allgemein die Neigung entweder zur Faltenbildung bei Stauchung und zu einer Rißbildung bei Dehnung, da die beiden Bleche sich beim Umformvorgang gleichsam gegenseitig "behindern". Daraus resultiert eine Verschlechterung der Materialeigenschaften des Strukturbauteils.The problem here is that the base plate and the reinforcing plate in the joint forming process are stretched and compressed differently. there in particular, the reinforcement plate at a bend, in which it is on the Sits inside with a smaller radius of curvature, more compressed and at one Bend where it sits on the outside stretched more while the base plate is respectively stretched or compressed in reverse. So there is general the tendency to either form wrinkles during compression and cracking Elongation, since the two sheets mutually as it were during the forming process "hinder". This results in a deterioration in the material properties of the Structural component.

Zwar ist aus der EP-A 0 672 477 ein Umformverfahren zum Drücken von Blechformteilen bekannt, bei dem Ausgang eine Blechplatine mit einer regelmäßigen Matrix von lokalen Verformungen, beispielsweise regelmäßigen Erhebungen, ist. Diese Verformungen sollen die Erzielung verhältnismäßig hoher Umformgrade des Blechformteils sicherstellen, ohne daß hierfür ein Tiefziehvorgang erforderlich wäre; stattdessen soll ein billigeres Drückformwerkzeug Einsatz finden können. Bei den dort ins Auge gefaßten Blechformteilen handelt es sich jedoch nicht um aus zwei fest miteinander verbundenen Blechen bestehende Platinen, wie bei der Erfindung, sondern, wie gesagt, um Einzelbleche, bei deren Umformung die erwähnte gegenseitige Behinderung nicht auftritt.EP-A 0 672 477 is indeed a forming process for pressing sheet metal parts known at the exit a sheet metal board with a regular matrix of local Deformations, for example regular surveys. These deformations are intended to achieve relatively high degrees of deformation of the sheet metal part ensure without the need for deep drawing; instead one should cheaper molding tool can be used. With those envisaged there However, sheet metal parts are not made of two firmly connected Sheet metal existing boards, as in the invention, but, as I said, um Single sheets, in the forming of which the mutual disability mentioned is not occurs.

Die Festigkeit eines gattungsgemäßen Strukturbauteils kann an sich durch Verwendung einer höheren Materialstärke gewährleistet werden, da bei Verwendung dünnerer Bleche die Gefahr einer Rißbildung und der Beeinträchtigung durch Faltenbildung groß ist. Die Wahl einer höheren Materialstärke führt jedoch zu einer Vergrößerung des Gesamtgewichts und der Materialkosten.The strength of a generic structural component can in itself be used a higher material thickness can be guaranteed, since using thinner sheets the risk of cracking and the impairment due to wrinkling is great. The Choosing a higher material thickness leads to an increase in the Total weight and material costs.

Der Erfindung liegt daher die Aufgabe zugrunde, ein gattungsgemäßes Verfahren derart auszugestalten und weiterzubilden, daß die Faltenbildung und Rißbildung in der Platine beim Umformvorgang gering gehalten und dennoch ein niedriges Gesamtgewicht eingehalten wird.The invention is therefore based on the object of a generic method of this type To design and develop that wrinkling and cracking in the board kept low during the forming process and yet a low overall weight is observed.

Diese Aufgabe wird durch ein gattungsgemäßes Verfahren mit den kennzeichnenden Merkmalen des Hauptanspruchs gelöst; die Unteransprüche beschreiben bevorzugte Ausbildungen der Erfindung. This task is accomplished by a generic method with the characteristic Features of the main claim solved; the sub-claims describe preferred Developments of the invention.

Durch eine Verformungsreserve in dem Verstärkungsblech kann dabei zum einen eine stärkere Dehnung des Verstärkungsblechs durch eine Glättung desselben ohne eine Materialausdünnung erreicht werden. Die Verformungsreserve kann dabei insbesondere eine höhere effektive Oberfläche aufweisen und z.B. durch verschiedene Strukturierungen in dem Verstärkungsblech gebildet werden. Eine Stauchung des Verstärkungsblechs wird dabei auch durch die Verformungsreserve aufgefangen, indem z.B. die Wölbstruktur eine lokal stärkere Aufwölbung erfährt, ohne daß in dem Verstärkungsblech Falten gebildet werden, die zu einem bevorzugten Abknicken des Strukturbauteils entlang einiger Linien führen.On the one hand, a deformation reserve in the reinforcing plate can result in a greater elongation of the reinforcement sheet by smoothing it without one Material thinning can be achieved. The deformation reserve can in particular have a higher effective surface and e.g. through different structuring in the reinforcement plate are formed. The reinforcement plate is compressed thereby also absorbed by the deformation reserve, e.g. the vault structure one locally bulges, without wrinkles being formed in the reinforcing plate become a preferred kinking of the structural component along some lines to lead.

Es gibt eine Vielzahl von Möglichkeiten, das erfindungsgemäße Verfahren zur Herstellung eines Strukturbauteiles in vorteilhafter Weise auszugestalten und weiterzubilden. Hierfür werden nun mehrere Ausführungsformen für ein entsprechend ausgebildetes Verstärkungsblech anhand der beiliegenden Zeichungen näher erläutert. Es zeigen:

Fig. 1
eine erste Ausführungsform eines Verstärkungsbleches,
Fig. 2
eine zweite Aufsführungsform eines Verstärkungsbleches,
Fig. 3
eine dritte Ausführungsform eines Verstärkungsbleches.
Fig. 4
eine perspektivische Ansicht einer Platine gemäß einer Ausführungsform.
There are a multitude of possibilities for advantageously designing and developing the method according to the invention for producing a structural component. For this purpose, several embodiments for a correspondingly designed reinforcing plate are now explained in more detail with the aid of the accompanying drawings. Show it:
Fig. 1
a first embodiment of a reinforcing plate,
Fig. 2
a second embodiment of a reinforcing sheet,
Fig. 3
a third embodiment of a reinforcement plate.
Fig. 4
a perspective view of a circuit board according to an embodiment.

Gemäß Fig. 1 weist eine Platine 4 ein Grundblech 2 auf, auf dem ein Verstärkungsblech 1 befestigt ist. Auf dem Verstärkungsblech sind in vorbestimmten Bereichen Verformungsreserven 3 ausgebildet, die aufgrund von Strukturierungen eine höhere effektive Oberfläche haben als andere Bereiche des Verstärkungsblechs oder das Grundblech 2.1, a circuit board 4 has a base plate 2 on which a reinforcing plate 1 is attached. On the reinforcement plate are in predetermined areas Deformation reserves 3 formed, the higher effective due to structuring Have surface than other areas of the reinforcement plate or the base plate 2.

Die Fig. 1 zeigt ein als Waffelblech ausgeführtes Verstärkungsblech 1, wohingegen die Fig. 2 ein als Schuppenblech ausgeführtes Verstärkungsblech 1 zeigt. In Fig. 3 ist ein Verstärkungsblech 1 gezeigt, das als wölbstrukturiertes Blech ausgeführt ist. Das Waffelblech zeigt pyramidenartige Erhebungen und das Schuppenblech längliche Erhebungen, die jeweils durch Stege voneinander getrennt sind; dabei sind aber auch entsprechende Ausbildungen möglich, bei denen die jeweiligen Erhebungen ohne derartige Stege direkt aneinander angrenzen und/oder zusätzliche Vertiefungen aufweisen. Bei dem in Fig. 3 gezeigten wölbstrukturierten Blech grenzen die Erhebungen ohne Stege direkt aneinander an.1 shows a reinforcing plate 1 designed as a waffle plate, whereas FIG. 2 shows a reinforcing plate 1 designed as a scale plate. 3 is a Reinforcement plate 1 shown, which is designed as a vaulted structured sheet. The Waffle plate shows pyramid-like elevations and the scale plate elongated Elevations, which are separated from each other by webs; but there are also appropriate training possible, in which the respective surveys without such Adjacent webs directly and / or have additional depressions. At the in Fig. 3 shown arched sheet metal directly limit the elevations without webs to each other.

Dadurch, daß das Verstärkungsblech 1 entsprechend vorgeformt ist, sind Verformungsreserven vorhanden, die beim anschließenden Umformen, z.B. Tiefziehen abgebaut werden können, ohne das Material allzu stark zu strecken. Weiterhin ist die erforderliche Materialdehnung bzw. -ausdehnung im Vergleich zu der eines nicht vorgeformten Verstärkungsbleches 1 relativ gesehen geringer, so daß eine Faltenbildung des Verstärkungsbleches 1 beim gemeinsamen Umformvorgang mit dem Grundblech verringert werden kann. Dies hat den Vorteil, daß keine wesentliche Verringerung der Materialdicke erfolgt.Characterized in that the reinforcing plate 1 is preformed accordingly Deformation reserves are available, which during subsequent forming, e.g. Deep drawing can be degraded without stretching the material too much. Furthermore, the required material expansion or expansion in comparison to that of one is not Preformed reinforcement plate 1 relatively lower, so that wrinkling of the reinforcement plate 1 during the joint forming process with the base plate can be reduced. This has the advantage that there is no significant reduction in the Material thickness is done.

Das in den Fig. 1 bis 3 gezeigte Verstärkungsblech 1 wird nun gemäß Fig. 4 vor dem gemeinsamen Umformen mit dem Grundblech zumindest teilweise mit dem Grundblech verbunden. Dies kann beispielsweise durch eine entsprechende Punktschweißtechnik, Laserschweißtechnik oder Klebetechnik, ggf. auch Kombinationen dieser Techniken erfolgen. Von Vorteil ist, wenn im Bereich zwischen dem Grundblech und dem Verstärkungsblech 1 entsprechende Korrosionsschutzmaßnahmen durchgeführt werden. In Abhängigkeit davon, wo das erzeugte Strukturbauteil an einem Kraftfahrzeug eingesetzt wird, kann das Strukturbauteil auch ein relativ großes Grundblech und hierauf angeordnet mehrere Verstärkungsbleche 1 aufweisen. The reinforcement plate 1 shown in FIGS. 1 to 3 is now according to FIG. 4 before joint forming with the base plate at least partially with the base plate connected. This can be done, for example, using an appropriate spot welding technique, Laser welding technology or adhesive technology, possibly combinations of these techniques respectively. It is advantageous if in the area between the base plate and the Reinforcement plate 1 appropriate corrosion protection measures are carried out. In Depends on where the structural component generated is used on a motor vehicle the structural component can also be a relatively large base plate and arranged thereon have a plurality of reinforcement plates 1.

Dann wird die aus dem Grundblech und dem oder den Verstärkungsblech(en) gebildete Platine umgeformt, z.B. durch einen Tiefziehvorgang.Then that is formed from the base plate and the reinforcement plate (s) Formed board, e.g. through a deep-drawing process.

Bei diesem Umformvorgang werden im allgemeinen einige Stellen der Platine stärker gestreckt oder gestaucht, oder die Platine wird stärkeren Biegungen unterworfen, bei denen das auf einer Seite des Grundblechs angebrachte Verstärkungsblech ebenfalls stärker gestaucht oder gestreckt wird. Durch eine günstige Anordnung der erfindungsgemäßen Bereiche mit Verformungsreserve, d.h. höherer effektiver Oberfläche, können die Streckungen und Stauchungen in diesen Bereichen abgefangen werden.During this forming process, some parts of the board generally become thicker stretched or compressed, or the board is subjected to stronger bends, in which the reinforcement plate attached to one side of the base plate is also stronger is compressed or stretched. By a favorable arrangement of the invention Areas with a deformation reserve, i.e. higher effective surface area, the Extensions and compressions can be absorbed in these areas.

Bei einer Streckung an einer Stelle, in der das Verstärkungsblech einer Streckung unterworfen ist, werden die Bereiche mit Erhöhungen und Vertiefungen geglättet, ohne daß ein größerer Materialfluß stattfinden muß oder eine größere Materialausdünnung in dem Bereich stattfindet. Weiterhin werden bei einer Stauchung die Erhöhungen und Vertiefungen gestaucht oder vergrößert, ohne daß größere Knicklinien ausgebildet werden, die zu einer Schwächung des Materials führen.When stretching at a point in which the reinforcement plate is stretched is subjected to, the areas with ridges and depressions are smoothed without a larger material flow must take place or a larger material thinning in the Area takes place. Furthermore, the ridges and valleys in a compression compressed or enlarged without forming larger crease lines that lead to a Weaken the material.

Das in den Fig. 1 bis 3 dargestellte Verstärkungsblech 1 kann in verschiedenen Bereichen auch eine unterschiedliche, aber in den jeweiligen Bereichen dann bestimmte Materialdicke aufweisen, so daß beim Umformen der Verstärkungsplatte 1 zur Erzeugung des Strukturbauteiles in diesen Bereichen dann ein optimaler Materialfluß bzw. eine optimale Materialdehnung erfolgen kann. Durch bestimmte Stähle bzw. Materialien kann dieses unterstützt werden, insbesondere wenn das Grundblech sowie das Verstärkungsblech 1 jeweils eine bestimmte Gefügestruktur aufweisen.The reinforcement plate 1 shown in FIGS. 1 to 3 can be used in different areas also a different, but then certain material thickness in the respective areas have so that when forming the reinforcing plate 1 to produce the Structural component in these areas then an optimal material flow or an optimal Material expansion can take place. This can be caused by certain steels or materials are supported, especially if the base plate and the reinforcement plate 1 each have a certain structure.

Im Ergebnis ist durch das beschriebene Verfahren eine plastische Verformung des Verstärkungsbleches 1 mit dem Grundblech zusammen leichter möglich, wobei eine geringere Faltenbildung und kleinere Kräfte zu erwarten sind. Von Vorteil ist, daß örtliche Materialdehnungen nicht allein aus der Blechdicke bereitgestellt werden müssen, sondern durch eine entsprechende Streckung der vorher erzeugten Form bereitgestellt werden können.As a result, a plastic deformation of the Reinforcement plate 1 with the base plate together easier, one less wrinkling and smaller forces are to be expected. The advantage is that local Material expansions do not have to be provided solely from the sheet thickness, but instead be provided by a corresponding stretching of the previously generated shape can.

Claims (9)

  1. Process for producing a structural component for motor vehicles, wherein firstly a plate is produced by attaching at least one metal reinforcing sheet (1) to a metal base sheet (2) which is at least partially covered by the metal reinforcing sheet (1), and wherein this plate is then subjected to a deformation process, characterised in that before the production of the plate, the metal reinforcing sheet (1) is provided with a deformation reserve (3) comprising indentations and raised portions of such a design that they can be smoothed by the deformation process on the plate.
  2. Process according to claim 1, characterised in that the metal reinforcing sheet (1) is formed at least partially as waffle plate.
  3. Process according to claim 1, characterised in that the metal reinforcing sheet (1) is formed at least partially as scaly plate.
  4. Process according to one of claims 1 to 3, characterised in that the metal reinforcing sheet (1) is formed at least partially as a metal sheet with a curved structure.
  5. Process according to one of claims 1 to 4, characterised in that the deformation process contains at least one deep-drawing process.
  6. Process according to one of claims 1 to 4, characterised in that in the region between the metal base sheet (2) and the metal reinforcing sheet (1), anti-corrosion measures are carried out.
  7. Process according to one of claims 1 to 6, characterised in that a plurality of metal reinforcing sheets (1) are attached to a metal base sheet (2).
  8. Process according to one of claims 1 to 7, characterised in that the metal reinforcing sheet (1) is formed with different but defined material thickness in different regions so that during deformation in these regions a different material flow and/or material stretch takes place.
  9. Process according to one of claims 1 to 8, characterised in that the metal base sheet (2) and the metal reinforcing sheet (1) have different textural structures.
EP98116748A 1997-09-27 1998-09-04 Blank for a structural member and method of manufacturing such a structural member for motor vehicles Expired - Lifetime EP0906799B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19742818A DE19742818A1 (en) 1997-09-27 1997-09-27 Circuit board for a structural component, structural component and method for producing a structural component for motor vehicles
DE19742818 1997-09-27

Publications (2)

Publication Number Publication Date
EP0906799A1 EP0906799A1 (en) 1999-04-07
EP0906799B1 true EP0906799B1 (en) 2001-06-20

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DE (2) DE19742818A1 (en)
ES (1) ES2160385T3 (en)

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DE4416231B4 (en) * 1994-05-07 2004-02-26 Xaver Lipp Process for producing a two-layer metal strip and device for carrying out the process
DE19524235A1 (en) * 1995-07-04 1997-01-16 Volkswagen Ag Method of manufacturing preformed part with different material thicknesses - involves cutting base blank to size, with plate-shaped reinforcing elements being joined to blank and single or multistage shaping of composite component carried out

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2926054A1 (en) * 2008-01-04 2009-07-10 Peugeot Citroen Automobiles Sa Reinforcement part for body structure of motor vehicle, has bead arranged in reinforcement part zone that is stressed during high speed impacts, where part is made of metal whose elastic limit is higher than specific megaPascals
US11982200B1 (en) 2023-06-23 2024-05-14 Pratt & Whitney Canada Corp. Structure with structural reinforcement patterns

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ES2160385T3 (en) 2001-11-01
EP0906799A1 (en) 1999-04-07
DE59800881D1 (en) 2001-07-26

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