EP3731983B1 - Arrangement for changing the shape of a sheet-like workpiece - Google Patents

Arrangement for changing the shape of a sheet-like workpiece Download PDF

Info

Publication number
EP3731983B1
EP3731983B1 EP19700802.2A EP19700802A EP3731983B1 EP 3731983 B1 EP3731983 B1 EP 3731983B1 EP 19700802 A EP19700802 A EP 19700802A EP 3731983 B1 EP3731983 B1 EP 3731983B1
Authority
EP
European Patent Office
Prior art keywords
workpiece
filling element
designed
arrangement according
forming
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.)
Active
Application number
EP19700802.2A
Other languages
German (de)
French (fr)
Other versions
EP3731983A1 (en
Inventor
Eilert WILKEN
Sven LAUTENBACH
Helmut FRERICHS
Michael Harms
Ingo BLAZEK
Marc BRESTRICH
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.)
Deharde GmbH
Original Assignee
Deharde GmbH
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 Deharde GmbH filed Critical Deharde GmbH
Priority to EP20199066.0A priority Critical patent/EP3778062B1/en
Publication of EP3731983A1 publication Critical patent/EP3731983A1/en
Application granted granted Critical
Publication of EP3731983B1 publication Critical patent/EP3731983B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

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
    • B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
    • B21D5/01—Bending sheet metal along straight lines, e.g. to form simple curves between rams and anvils or abutments
    • 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
    • B21D31/00—Other methods for working sheet metal, metal tubes, metal profiles
    • B21D31/005—Incremental shaping or bending, e.g. stepwise moving a shaping tool along the surface of the workpiece
    • 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
    • B21D53/00—Making other particular articles
    • B21D53/92—Making other particular articles other parts for aircraft

Definitions

  • the present invention relates to an arrangement for changing the shape of a plate-like workpiece, which has a mold recess formed by reducing the material thickness, comprising a workpiece, at least two spaced-apart support elements arranged for arranging the workpiece on a machine bed, a for shaping the workpiece into a final shape by stepwise, repetitive free bending set up forming device with an upper tool, which can be lowered from a waiting position into a forming position in a controllable manner for bending a section of the workpiece and with positioning means which are designed to move the position of the workpiece relative to the machine bed in at least one infeed direction.
  • Arrangements of this type are used in particular in the processing of large metal sheets, which serve as the outer paneling of aircraft.
  • the sheets have to be shaped to match the outer contour of the aircraft fuselage, and a workpiece with several different radii often has to be produced.
  • the sheets are often brought into the desired final shape by means of roll forming, i.e. formed as they pass through different rolls.
  • the formed metal sheets are then regularly machined to create rivet holes, pockets and cutouts in the already formed workpiece.
  • US5956991 discloses an assembly including two supports, a punch and a flexible die.
  • the object is achieved by an arrangement with the features mentioned at the beginning, which is characterized in that it further comprises a filling element adapted to the mold recess and set up for material thickness compensation, which is set up, before the workpiece is formed into the final shape in the area of the mold recess, to be arranged.
  • a preferred development of the invention is characterized in that the filling element is designed at least essentially as a negative form of the mold recess.
  • the filling element is designed in such a way that it fits into the mold recess in a form-fitting or essentially form-fitting manner.
  • the filling element thus forms a reusable intermediate layer which is arranged between the upper tool and the workpiece.
  • the filling element ensures that the forces acting during the bending process are introduced evenly into the workpiece and compensates for the different forming behavior during the bending process that depends on the material thickness. So the entire workpiece is despite the existing mold recess bent exactly and with high precision and repeatability.
  • the filling element has a minimum thickness in areas of the mold recess with reduced material thickness, which corresponds at least to the extent of the material thickness reduction of the workpiece in this area.
  • the filling element is therefore set up as a compensating element that exactly compensates for the material removal from the previously performed machining process on the workpiece, so that there is always essentially flat contact between the upper tool and the workpiece or the filling element arranged thereon during the forming process.
  • the filling element is created in such a way that, when arranged in the mold recess, it terminates flush with the upper side of the workpiece, forming an at least essentially smooth contact surface.
  • the filling element is set up such that it projects in relation to the pressure surface in predetermined areas of elevation.
  • the filling element projects in relation to the pressure surface in predetermined areas of elevation.
  • the areas of elevation are formed by a pressure-resistant film that is arranged on the pressure surface of the filling element. In this way, undesired springback behavior of workpiece areas can be compensated for in a particularly simple and cost-effective manner.
  • the foil is connected to the pressure surface by an adhesive connection.
  • the foil is advantageously glued on and in this way is also secured against undesired slipping.
  • ABS acrylonitrile butadiene plastic
  • ABS is machinable, comparatively inexpensive and has the physical properties required for the forming process.
  • ABS has the flexibility it needs to return to its original shape after the bending process.
  • ABS has the hardness required to transfer the forces generated during the forming process from the upper tool to the workpiece to be formed without deforming itself to any appreciable extent.
  • the filling element is preferably produced by machining. In this way, the filling element can be produced inexpensively and with high precision.
  • An expedient embodiment of the invention is characterized in that a resilient support surface element is arranged between the support elements of the machine bed and the workpiece.
  • the resilient support surface element forms a resilient machine bed.
  • the supporting surface element is elastically deformed and thus supports the workpiece over its entire surface.
  • workpieces with a small material thickness can be formed and, on the other hand, it is possible to also form the end areas of the workpieces with high precision, since the end areas are also always supported during the forming process.
  • figure 1 shows a plate-like workpiece 10 with a mold recess formed by reducing the material thickness.
  • the workpiece is sheet metal or large sheet metal for use as an outer skin for an aircraft, in particular made from aluminum alloys containing copper and/or magnesium with high tensile strengths in the range from 400 to 450 N/mm 2 .
  • Such sheets have, for example, dimensions of 800 x 800 mm up to 6000 x 6000 mm.
  • the maximum material thickness of the workpiece 10 varies between 0.5 and 16 mm, depending on the application.
  • the arrangement according to the invention is suitable for forming workpieces 10 made of plastic or metal, such as aluminum and steel sheets.
  • the workpiece 10 has a mold recess that is formed by reducing the material thickness. Like the schematic view in figure 1 it can be seen that the workpiece 10 has areas 11 of reduced material thickness. These areas 11 form the mold cavity. When the workpieces 10 are used in the aircraft industry as aircraft skins, these areas 11 are introduced into the workpiece 10 for example through rivet holes, pockets to save weight, cutouts for windows or the like.
  • the machining of the workpiece for introducing the mold recess is carried out by machining, for example on the plate-like, ie flat workpiece 10 using three-axis machining machines.
  • the workpiece 10 In order to change the shape, for example in order to adapt the workpiece 10 to the desired contour of the aircraft, it is preferably arranged on at least two support elements 12 of a machine bed 13 which are spaced apart from one another.
  • the forming process into the final shape is carried out by step-by-step free bending.
  • a section of the workpiece 10 is brought into a forming position 15 by lowering an upper tool 14 between the support elements 12 from a waiting position--not shown in the drawing.
  • figure 2 shows the workpiece 10 schematically after one or more forming processes. The steps described above are carried out repeatedly until the desired final shape is achieved by multiple forming.
  • the positioning means are designed and set up not only to move the workpiece 10 in the infeed direction 17 shown, but also to move it in a further direction perpendicular to the infeed direction 17 .
  • the workpiece can be positioned and moved as much as you like in the XY plane.
  • the immersion depth of the upper tool 14 which is determined by the lowering path
  • the local bending radius desired in each case in a forming process is specified.
  • the workpiece 10 is formed into the desired final shape. Different radii can be introduced into the workpiece 10 by specifying individual immersion depths for each bending process.
  • a filling element 18 adapted to the mold cavity and set up to compensate for the material thickness is created and arranged in the area of the mold cavity. As in the figures 1 and 2 shown, the filling element 18 is arranged on the workpiece 10 to be formed and thus fills in particular the areas 11 of reduced material thickness of the mold recess.
  • the upper tool 14 advantageously has a blade end 22 that comes into contact with the workpiece 10 or the filling element 18 .
  • This is preferably made of plastic and has a large radius, preferably greater than 50 mm, in order on the one hand to bend the workpiece 10 gently and on the other hand to ensure the smoothest possible transitions in the bending radii.
  • the filling element 18 is preferably created as a negative mold or essentially as a negative mold of the mold recess.
  • the filling element 18 has a shape that corresponds to the shape of the regions 11 of reduced material thickness, so that the filling element 18 arranged on the workpiece 10 preferably fills the entire surface of the mold recess and completely compensates for the material removal of the workpiece 10 in the region of the mold recess.
  • the filling element 18 thus forms a flat or smooth contact surface 19 with the workpiece 10 on the upper tool side. It is also possible to design the filling element 18 in such a way that it only partially covers selected areas of the workpiece 10 .
  • the filling element 18 has a minimum thickness in regions 11 of the mold recess with reduced material thickness, which corresponds at least to the extent of the material thickness reduction of the workpiece 10 in this region.
  • the workpiece 10 thus forms the previously described flat contact surface 19 with the filling element 18, so that during the forming process a flat contact between the upper tool 14 and the workpiece 10 or the filling element 18 is guaranteed.
  • the filling element 18 is therefore created in such a way that, when arranged in the mold recess, it terminates flush with the upper side 20 of the workpiece 10 while forming the at least substantially smooth contact surface 19 .
  • the filling element is created so as to project in predetermined areas of elevation in relation to the pressure surface 19.
  • the workpiece 10 has a different spring-back behavior.
  • the material of the workpiece springs back to varying degrees after the forming process.
  • this spring-back behavior is determined in a simulation before the forming process, and the spring-back behavior of the entire workpiece 10 to be formed is predicted using this simulation.
  • the areas of elevation are then determined at which the filling element is to be made correspondingly wider, so that it has the areas of elevation mentioned.
  • An increased immersion depth is achieved in these areas of elevation compared to the remaining areas of the filling element, and in this way the force exerted on the workpiece is increased in the areas of elevation compared to the remaining areas during the bending process.
  • the workpiece 10 is bent locally at the points of the raised areas to such an extent that the spring-back behavior of the material is compensated for and the workpiece 10 is formed exactly into the desired final shape in all areas.
  • a process simulation using a program for analysis using the finite element method is used to determine the superelevation areas.
  • FEM finite element method
  • the filling element 18 is preferably milled from the solid on the basis of the determined geometry of the filling element 18 .
  • a pressure-resistant film on the pressure surface 19 of the filling element to create the elevation areas and thus adjust the material thickness of the filling element 18 accordingly in the respective elevation areas. More preferably, the film is glued to the pressure surface 19 of the filling element 18 and is thus secured against unwanted slipping.
  • the filling element 18 is preferably made of acrylonitrile butadiene plastic (ABS). This material has a modulus of elasticity of 2400 MPa and thus has the necessary flexibility to be elastically deformed during the forming process on the one hand and to assume its original shape again after the end of the forming process on the other. In this way, the filling element 18 can be used for a large number of forming processes.
  • ABS plastic preferably has a hardness of 90 shore and is suitable for being machined.
  • the filling element 18 can be made of other plastics, fiber composite materials, cast resin or spring steel. In addition to machining, depending on the material used, casting or laminating methods are also used to produce the filling element 18 .
  • FIG 3 a further advantageous embodiment of the arrangement according to the invention is shown.
  • a resilient support surface element 21 is arranged between the support elements 12 of the machine bed 13 and the workpiece 10 .
  • the workpiece 10 is thus mounted on the at least two support elements 12 via the resilient support surface element 21 .
  • the support surface element 21 is consequently designed as a spring machine bed and is elastically deformed during the forming process of the workpiece 10, but automatically returns to its original shape after the bending process is complete.
  • the workpiece 10 is supported over its entire surface by the supporting surface element 21 .

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Description

Die vorliegende Erfindung betrifft eine Anordnung zur Formänderung eines plattenartigen Werkstücks, das eine durch Materialstärkenreduzierung gebildete Formausnehmung aufweist, umfassend ein Werkstück, mindestens zwei zum Anordnen des Werkstücks auf einem Maschinenbett eingerichtete, voneinander beabstandete Stützelemente, eine zum Umformen des Werkstücks in eine Endform durch schrittweises, repetierendes Freibiegen eingerichtete Umformeinrichtung mit einem Oberwerkzeug, das aus einer Warteposition in eine Umformposition steuerbeweglich absenkbar zum Biegen eines Teilabschnitts des Werkstücks eingerichtet ist sowie mit Positioniermitteln, die zum Verfahren der Position des Werkstücks relativ zu dem Maschinenbett in mindestens einer Zustellrichtung ausgebildet sind.The present invention relates to an arrangement for changing the shape of a plate-like workpiece, which has a mold recess formed by reducing the material thickness, comprising a workpiece, at least two spaced-apart support elements arranged for arranging the workpiece on a machine bed, a for shaping the workpiece into a final shape by stepwise, repetitive free bending set up forming device with an upper tool, which can be lowered from a waiting position into a forming position in a controllable manner for bending a section of the workpiece and with positioning means which are designed to move the position of the workpiece relative to the machine bed in at least one infeed direction.

Derartige Anordnungen kommen insbesondere bei der Bearbeitung von Großblechen zum Einsatz, die als Außenverkleidung von Flugzeugen dienen. Die Bleche sind entsprechend der Außenkontur des Flugzeugrumpfes umzuformen und häufig ist ein Werkstück mit mehreren verschiedenen Radien herzustellen. Die Bleche werden häufig mittels Rollumformen in die gewünschte Endform gebracht, also beim Durchlauf verschiedener Rollen umgeformt.Arrangements of this type are used in particular in the processing of large metal sheets, which serve as the outer paneling of aircraft. The sheets have to be shaped to match the outer contour of the aircraft fuselage, and a workpiece with several different radii often has to be produced. The sheets are often brought into the desired final shape by means of roll forming, i.e. formed as they pass through different rolls.

Regelmäßig werden die umgeformten Bleche anschließend spanend bearbeitet, um Nietbohrungen, Taschen und Ausschnitte in das bereits umgeformte Werkstück einzubringen.The formed metal sheets are then regularly machined to create rivet holes, pockets and cutouts in the already formed workpiece.

Aus dem Dokument DE 10 2011 114 927 A1 geht ein Verfahren zum Rundbiegen von großen Blechen auf einen Zielradius hervor. Das Rundbiegen erfolgt mittels einer Kantbank durch mehrfaches Kanten mit einem Rundstempel.From the document DE 10 2011 114 927 A1 describes a process for bending large sheet metal to a target radius. The round bending is done using a folding bench by multiple edging with a round punch.

US5956991 offenbart ein Anordnung, das zwei Stützen, ein Oberwerkzeug und eine flexible Matrize enthält. US5956991 discloses an assembly including two supports, a punch and a flexible die.

Nachteilig ist, dass mit den bekannten Verfahren und Anordnungen ausschließlich vollflächige Werkstücke bearbeitet werden können. Zerspanend bearbeitete Werkstücke, die also beispielsweise bereits Taschen, Nietbohrungen oder Ausnehmungen für Fenster aufweisen, sind mit den bekannten Verfahren und Anordnungen nicht zufriedenstellend zu bearbeiten, da derartige Formausnehmungen im Werkstück bei Nutzung der bekannten Umformverfahren zu unkontrollierbaren Verformungen des Werkstücks im Bereich dieser Formausnehmungen führen.The disadvantage is that only full-surface workpieces can be processed with the known methods and arrangements. Machined workpieces, which for example already have pockets, rivet holes or recesses for windows, cannot be processed satisfactorily with the known methods and arrangements, since such shaped recesses in the workpiece lead to uncontrollable deformations of the workpiece in the area of these shaped recesses when using the known forming processes.

Aufgrund dessen ist es erforderlich, die Werkstücke zunächst in einem Biegeprozess umzuformen und diese erst anschließend zerspanend zu bearbeiten, um die gewünschte Formausnehmung herzustellen. Aufgrund der nach dem Biegeprozess des Werkstücks erhaltenen, sich räumlich erstreckenden Werkstückgeometrie ist für die anschließende Bearbeitung der Einsatz von 5-Achsen-Portalfräsen unvermeidlich, der mit großem Platzbedarf und hohen Anschaffungs- und Unterhaltungskosten einhergeht.Because of this, it is necessary to first shape the workpieces in a bending process and only then to machine them in order to produce the desired shaped recess. Due to the spatially extending workpiece geometry obtained after the bending process of the workpiece, the use of 5-axis portal milling machines is unavoidable for the subsequent processing, which is associated with a large space requirement and high acquisition and maintenance costs.

Es ist daher Aufgabe der vorliegenden Erfindung, eine Anordnung vorzuschlagen, mittels dessen plattenartige, bereits zerspanend bearbeitete Werkstücke kostengünstig, mit hoher Präzision und Wiederholgenauigkeit durch schrittweises Freibiegen umgeformt werden können.It is therefore the object of the present invention to propose an arrangement by means of which plate-like workpieces that have already been machined can be formed cost-effectively, with high precision and repeat accuracy by step-by-step free bending.

Die Aufgabe wird durch eine Anordnung mit den eingangs genannten Merkmalen gelöst, die sich dadurch auszeichnet, dass diese weiter ein an die Formausnehmung angepasstes und zum Materialstärkenausgleich eingerichtetes Füllelement umfasst, das eingerichtet ist, vor dem Umformen des Werkstücks in die Endform im Bereich der Formausnehmung, angeordnet zu werden.The object is achieved by an arrangement with the features mentioned at the beginning, which is characterized in that it further comprises a filling element adapted to the mold recess and set up for material thickness compensation, which is set up, before the workpiece is formed into the final shape in the area of the mold recess, to be arranged.

Eine bevorzugte Weiterbildung der Erfindung zeichnet sich dadurch aus, dass das Füllelement zumindest im Wesentlichen als Negativform der Formausnehmung ausgebildet ist. Anders ausgedrückt ist das Füllelement derart ausgebildet, dass es formschlüssig oder im Wesentlichen formschlüssig in die Formausnehmung hineinpasst. Das Füllelement bildet so eine wiederverwendbare Zwischenlage, die zwischen dem Oberwerkzeug und dem Werkstück angeordnet ist. Das Füllelement gewährleistet eine gleichmäßige Einleitung der beim Biegevorgang wirkenden Kräfte in das Werkstück und kompensiert das materialstärkenabhängige unterschiedliche Umformverhalten beim Biegevorgang. So wird das gesamte Werkstück trotz der vorhandenen Formausnehmung exakt und mit hoher Präzision und Wiederholgenauigkeit gebogen.A preferred development of the invention is characterized in that the filling element is designed at least essentially as a negative form of the mold recess. In other words, the filling element is designed in such a way that it fits into the mold recess in a form-fitting or essentially form-fitting manner. The filling element thus forms a reusable intermediate layer which is arranged between the upper tool and the workpiece. The filling element ensures that the forces acting during the bending process are introduced evenly into the workpiece and compensates for the different forming behavior during the bending process that depends on the material thickness. So the entire workpiece is despite the existing mold recess bent exactly and with high precision and repeatability.

Gemäß einer weiteren bevorzugten Ausbildung der Erfindung weist das Füllelement in Bereichen der Formausnehmung mit reduzierter Materialstärke jeweils eine Mindestdicke auf, die mindestens dem Maß der Materialstärkenreduktion des Werkstücks in diesem Bereich entspricht. Das Füllelement ist folglich als Ausgleichselement eingerichtet, dass den Materialabtrag durch den zuvor erfolgten Zerspanungsprozess an dem Werkstück exakt kompensiert, so dass beim Umformvorgang stets ein im Wesentlichen flächiger Kontakt zwischen dem Oberwerkzeug und dem Werkstück bzw. dem darauf angeordneten Füllelement gegeben ist. Entsprechend einer weiteren zweckmäßigen Ausbildung der Erfindung wird das Füllelement derart erstellt, dass dieses, in der Formausnehmung angeordnet, unter Bildung einer zumindest im Wesentlichen glatten Andruckfläche mit der Oberseite des Werkstücks bündig abschließt.According to a further preferred embodiment of the invention, the filling element has a minimum thickness in areas of the mold recess with reduced material thickness, which corresponds at least to the extent of the material thickness reduction of the workpiece in this area. The filling element is therefore set up as a compensating element that exactly compensates for the material removal from the previously performed machining process on the workpiece, so that there is always essentially flat contact between the upper tool and the workpiece or the filling element arranged thereon during the forming process. According to a further expedient embodiment of the invention, the filling element is created in such a way that, when arranged in the mold recess, it terminates flush with the upper side of the workpiece, forming an at least essentially smooth contact surface.

Gemäß einer weiteren bevorzugten Ausführungsform ist das Füllelement in vorgegebenen Überhöhungsbereichen gegenüber der Andruckfläche vorspringend eingerichtet. Hierdurch wirken in den entsprechenden Überhöhungsbereichen beim Umformvorgang lokal höher Biegekräfte auf das Werkstück ein. Auf diese Weise wird das Rücksprungverhalten des Materials, das abhängig von der jeweiligen lokalen Materialstärke des Werkstücks ist, kompensiert und der Biegevorgang auch in Bereichen verschiedener Materialstärke des Werkstücks mit äußerst hoher Präzision durchgeführt. Mit anderen Worten sind die Überhöhungsbereiche des Füllelements zur Kompensation des Rücksprungverhaltens ausgebildet und eingerichtet.According to a further preferred embodiment, the filling element is set up such that it projects in relation to the pressure surface in predetermined areas of elevation. As a result, locally higher bending forces act on the workpiece in the corresponding areas of elevation during the forming process. In this way, the springback behavior of the material, which depends on the respective local material thickness of the workpiece, is compensated for and the bending process is carried out with extremely high precision even in areas of the workpiece with different material thicknesses. In other words, the elevation areas of the filling element are designed and set up to compensate for the spring-back behavior.

Alternativ oder in Ergänzung werden die Überhöhungsbereiche durch eine druckfeste Folie gebildet, die auf der Andruckfläche des Füllelements angeordnet ist. So kann auf besonders einfache und kostengünstige Weise eine Kompensation unerwünschten Rücksprungverhaltens von Werkstückbereichen erzielt werden.Alternatively or in addition, the areas of elevation are formed by a pressure-resistant film that is arranged on the pressure surface of the filling element. In this way, undesired springback behavior of workpiece areas can be compensated for in a particularly simple and cost-effective manner.

Gemäß einer weiteren bevorzugten Ausführungsform ist die Folie mit der Andruckfläche durch eine Klebeverbindung verbunden. Die Folie wird hierzu vorteilhafterweise aufgeklebt und ist auf diese Weise zudem gegen unerwünschtes Verrutschen gesichert.According to a further preferred embodiment, the foil is connected to the pressure surface by an adhesive connection. For this purpose, the foil is advantageously glued on and in this way is also secured against undesired slipping.

Eine bevorzugte Weiterbildung der Erfindung zeichnet sich dadurch aus, dass das Füllelement aus Acrylnitril-Butadien-Kunststoff (ABS) ist bzw. hergestellt wird. ABS ist zerspanbar, vergleichsweise kostengünstig und weist die für den Umformvorgang erforderlichen physikalischen Eigenschaften auf. Zum einen verfügt ABS über die erforderliche Flexibilität, um nach dem Biegevorgang wieder seine ursprüngliche Form anzunehmen. Zum anderen verfügt ABS über die erforderliche Härte, um die beim Umformvorgang entstehenden Kräfte von dem Oberwerkzeug auf das umzuformenden Werkstück zu übertragen, ohne sich selbst nennenswert zu verformen. Vorzugsweise wird das Füllelement durch Zerspannen hergestellt. Auf diese Weise ist das Füllelement kostengünstig und mit hoher Präzision herstellbar.A preferred further development of the invention is characterized in that the filling element is or is made of acrylonitrile butadiene plastic (ABS). ABS is machinable, comparatively inexpensive and has the physical properties required for the forming process. For one thing, ABS has the flexibility it needs to return to its original shape after the bending process. On the other hand, ABS has the hardness required to transfer the forces generated during the forming process from the upper tool to the workpiece to be formed without deforming itself to any appreciable extent. The filling element is preferably produced by machining. In this way, the filling element can be produced inexpensively and with high precision.

Eine zweckmäßige Ausgestaltung der Erfindung ist dadurch gekennzeichnet, dass zwischen den Stützelementen des Maschinenbetts und dem Werkstück ein federndes Stützflächenelement angeordnet ist. Das federnde Stützflächenelement bildet ein federndes Maschinenbett. Beim Umformvorgang wird das Stützflächenelement elastisch mitverformt und stützt so vollflächig das Werkstück. Vorteilhafterweise können so einerseits Werkstücke mit geringer Materialstärke umgeformt werden und anderseits ist es so möglich, auch die Endbereiche der Werkstücke mit hoher Präzision umzuformen, da auch die Endbereiche während des Umformens stets gestützt werden.An expedient embodiment of the invention is characterized in that a resilient support surface element is arranged between the support elements of the machine bed and the workpiece. The resilient support surface element forms a resilient machine bed. During the forming process, the supporting surface element is elastically deformed and thus supports the workpiece over its entire surface. Advantageously, on the one hand, workpieces with a small material thickness can be formed and, on the other hand, it is possible to also form the end areas of the workpieces with high precision, since the end areas are also always supported during the forming process.

Weitere bevorzugte und/oder zweckmäßige Merkmale und Ausgestaltungen der Anordnung ergeben sich aus den Unteransprüchen und der Beschreibung. Besonders bevorzugte Ausführungsformen werden anhand der beigefügten Zeichnung näher erläutert. In der Zeichnung zeigt:

  • Fig. 1 die schematische Ansicht der erfindungsgemäßen Anordnung gemäß einer ersten Ausführungsform,
  • Fig. 2 eine schematische Ansicht des Umformvorgangs mittels der erfindungsgemäßen Anordnung, und
  • Fig. 3 eine weitere vorteilhafte Ausführung der erfindungsgemäßen Anordnung mit einem Stützflächenelement.
Further preferred and/or expedient features and configurations of the arrangement result from the dependent claims and the description. Particularly preferred embodiments are explained in more detail with reference to the attached drawing. In the drawing shows:
  • 1 the schematic view of the arrangement according to the invention according to a first embodiment,
  • 2 a schematic view of the forming process by means of the arrangement according to the invention, and
  • 3 a further advantageous embodiment of the arrangement according to the invention with a support surface element.

Die erfindungsgemäße Anordnung wird im Folgenden anhand bevorzugter Ausführungsformen näher beschrieben.The arrangement according to the invention is described in more detail below with reference to preferred embodiments.

Figur 1 zeigt ein plattenartiges Werkstück 10 mit einer durch Materialstärkenreduzierung gebildeten Formausnehmung. Beispielsweise ist das Werkstück ein Blech oder Großblech zur Verwendung als Flugzugaußenhaut, insbesondere aus Aluminiumlegierungen mit Kupfer- und/oder Magnesiumanteilen mit hohen Zugfestigkeiten im Bereich von 400 bis 450 N/mm2. Derartige Bleche weisen beispielsweise Maße von 800 x 800 mm bis zu 6000 x 6000 mm auf. Die maximale Materialstärke des Werkstücks 10 variiert je nach Anwendungsfall zwischen 0,5 und 16 mm. Die erfindungsgemäße Anordnung ist zum Umformen von Werkstücken 10 aus Kunststoff oder Metall, wie Aluminium- und Stahlblechen geeignet. figure 1 shows a plate-like workpiece 10 with a mold recess formed by reducing the material thickness. For example, the workpiece is sheet metal or large sheet metal for use as an outer skin for an aircraft, in particular made from aluminum alloys containing copper and/or magnesium with high tensile strengths in the range from 400 to 450 N/mm 2 . Such sheets have, for example, dimensions of 800 x 800 mm up to 6000 x 6000 mm. The maximum material thickness of the workpiece 10 varies between 0.5 and 16 mm, depending on the application. The arrangement according to the invention is suitable for forming workpieces 10 made of plastic or metal, such as aluminum and steel sheets.

Das Werkstück 10 weist eine Formausnehmung auf, die durch Materialstärkenreduzierung gebildet ist. Wie der schematischen Ansicht in Figur 1 zu entnehmen ist, weist das Werkstück 10 Bereiche 11 reduzierter Materialstärke auf. Diese Bereiche 11 bilden die Formausnehmung. Bei der Verwendung der Werkstücke 10 in der Flugzeugindustrie als Flugzeugaußenhaut, auch als "skins" bezeichnet, werden diese Bereiche 11 beispielsweise durch Nietbohrungen, Taschen zur Gewichtsersparnis, Ausschnitte für Fenster oder dergleichen in das Werkstück 10 eingebracht. Die Bearbeitung des Werkstücks zum Einbringen der Formausnehmung erfolgt durch Zerspanen, beispielsweise am plattenartigen, also ebenen Werkstück 10 mittels dreiachsigen Zerspanungsmaschinen.The workpiece 10 has a mold recess that is formed by reducing the material thickness. Like the schematic view in figure 1 it can be seen that the workpiece 10 has areas 11 of reduced material thickness. These areas 11 form the mold cavity. When the workpieces 10 are used in the aircraft industry as aircraft skins, these areas 11 are introduced into the workpiece 10 for example through rivet holes, pockets to save weight, cutouts for windows or the like. The machining of the workpiece for introducing the mold recess is carried out by machining, for example on the plate-like, ie flat workpiece 10 using three-axis machining machines.

Zur Formänderung, beispielsweise um das Werkstück 10 an die gewünschte Flugzeugkontur anzupassen, wird dieses vorzugsweise auf mindestens zwei voneinander beabstandeten Stützelementen 12 eines Maschinenbettes 13 angeordnet. Der Umformvorgang in die Endform erfolgt durch schrittweises Freibiegen. Hierzu wird ein Teilabschnitt des Werkstücks 10 durch Absenken eines Oberwerkzeugs 14 zwischen die Stützelemente 12 aus einer - in der Zeichnung nicht gezeigten - Warteposition in eine Umformposition 15 gebracht.In order to change the shape, for example in order to adapt the workpiece 10 to the desired contour of the aircraft, it is preferably arranged on at least two support elements 12 of a machine bed 13 which are spaced apart from one another. The forming process into the final shape is carried out by step-by-step free bending. For this purpose, a section of the workpiece 10 is brought into a forming position 15 by lowering an upper tool 14 between the support elements 12 from a waiting position--not shown in the drawing.

Anschließend wird das Oberwerkzeug 14 angehoben, also wieder in z-Richtung 16 in die Warteposition verfahren. Nun wird die Position des Werkstück 10 relativ zu dem Maschinenbett in mindestens einer Zustellrichtung 17 verfahren. Figur 2 zeigt das Werkstück 10 schematisch nach einem oder mehreren Umformvorgängen. Die zuvor beschriebenen Schritte werden repetierend so oft ausgeführt, bis die gewünschte Endform durch mehrfaches Umformen erreicht ist.The upper tool 14 is then raised, ie moved again in the z-direction 16 to the waiting position. Now the position of the workpiece 10 is moved relative to the machine bed in at least one infeed direction 17 . figure 2 shows the workpiece 10 schematically after one or more forming processes. The steps described above are carried out repeatedly until the desired final shape is achieved by multiple forming.

Weiter bevorzugt sind die - in der Zeichnung nicht gezeigten - Positioniermittel ausgebildet und eingerichtet, das Werkstück 10 nicht nur in der gezeigten Zustellrichtung 17 zu verfahren, sondern zusätzlich in einer weiteren Richtung senkrecht zu der Zustellrichtung 17 zu verfahren. Das Werkstück kann so weitestgehend beliebig in der XY-Ebene positioniert und verfahren werden. Zusätzlich ist es möglich, das Oberwerkzeug 14 gegenüber der Z-Richtung 17 zu neigen. Auf diese Weise können die Werkstücke in gewissem Maß beim Umformen tordiert werden.More preferably, the positioning means—not shown in the drawing—are designed and set up not only to move the workpiece 10 in the infeed direction 17 shown, but also to move it in a further direction perpendicular to the infeed direction 17 . The workpiece can be positioned and moved as much as you like in the XY plane. In addition, it is possible to incline the upper tool 14 in relation to the Z-direction 17 . In this way, the workpieces can be twisted to a certain extent during forming.

Durch Vorgabe der Eintauchtiefe des Oberwerkzeugs 14, die durch Absenkweg bestimmt ist, wird der jeweils bei einem Umformvorgang gewünschte lokale Biegeradius vorgegeben. Durch repetierendes Ausführen dieses Umformvorgangs wird das Werkstück 10 in die gewünschte Endform umgeformt. Durch Vorgabe individueller Eintauchtiefen für jeden Biegevorgang können unterschiedliche Radien in das Werkstück 10 eingebracht werden.By specifying the immersion depth of the upper tool 14, which is determined by the lowering path, the local bending radius desired in each case in a forming process is specified. By repeating this forming process, the workpiece 10 is formed into the desired final shape. Different radii can be introduced into the workpiece 10 by specifying individual immersion depths for each bending process.

Vor dem Umformen des Werkstücks 10 in die Endform wird ein an die Formausnehmung angepasstes und zum Materialstärkenausgleich eingerichtetes Füllelement 18 erstellt und im Bereich der Formausnehmung angeordnet. Wie in den Figuren 1 und 2 gezeigt, wird das Füllelement 18 auf dem umzuformenden Werkstück 10 angeordnet und füllt so insbesondere die Bereiche 11 reduzierter Materialstärke der Formausnehmung aus.Before the workpiece 10 is formed into the final shape, a filling element 18 adapted to the mold cavity and set up to compensate for the material thickness is created and arranged in the area of the mold cavity. As in the figures 1 and 2 shown, the filling element 18 is arranged on the workpiece 10 to be formed and thus fills in particular the areas 11 of reduced material thickness of the mold recess.

Hierdurch wird es erstmals möglich, bereits spanend bearbeitete Werkstücke 10 mit den genannten Formausnehmungen anschließend durch Freibiegen umzuformen, ohne aufgrund bereits eingebrachter Bereiche reduzierter Materialstärke in dem Werkstück 10 in diesen Bereichen Umformergebnisse zu erhalten, die den engen vorgegebenen Toleranzen zuwiderlaufen.This makes it possible for the first time to reshape workpieces 10 that have already been machined with the above-mentioned mold recesses by free bending, without obtaining reshaping results in these areas due to areas of reduced material thickness already introduced in the workpiece 10 that run counter to the narrow specified tolerances.

Das Oberwerkzeug 14 weist vorteilhafterweise ein mit dem Werkstück 10 bzw. dem Füllelement 18 in Kontakt kommendes Schwertende 22 auf. Dieses ist vorzugsweise aus Kunststoff gefertigt und weist einen großen Radius, vorzugsweise größer 50 mm auf, um einerseits das Werkstück 10 schonend zu biegen und andererseits möglichst weiche Übergänge der Biegeradien zu gewährleisten.The upper tool 14 advantageously has a blade end 22 that comes into contact with the workpiece 10 or the filling element 18 . This is preferably made of plastic and has a large radius, preferably greater than 50 mm, in order on the one hand to bend the workpiece 10 gently and on the other hand to ensure the smoothest possible transitions in the bending radii.

Vorzugsweise wird das Füllelement 18 als Negativform bzw. im Wesentlichen als Negativform der Formausnehmung erstellt. Mit anderen Worten weist das Füllelement 18 eine Form auf, die zur Form der Bereiche 11 reduzierter Materialstärke korrespondiert, so dass das auf dem Werkstück 10 angeordnete Füllelement 18 die Formausnehmung vorzugsweise vollflächig ausfüllt und den Materialabtrag des Werkstücks 10 im Bereich der Formausnehmung vollständig kompensiert. Das Füllelemente 18 bildet so mit dem Werkstück 10 oberwerkzeugseitig eine ebene bzw. glatte Andruckfläche 19. Auch ist es möglich das Füllelement 18 so zu gestalten, dass dieses nur partiell ausgewählte Bereiche des Werkstücks 10 abdeckt.The filling element 18 is preferably created as a negative mold or essentially as a negative mold of the mold recess. In other words, the filling element 18 has a shape that corresponds to the shape of the regions 11 of reduced material thickness, so that the filling element 18 arranged on the workpiece 10 preferably fills the entire surface of the mold recess and completely compensates for the material removal of the workpiece 10 in the region of the mold recess. The filling element 18 thus forms a flat or smooth contact surface 19 with the workpiece 10 on the upper tool side. It is also possible to design the filling element 18 in such a way that it only partially covers selected areas of the workpiece 10 .

Weiter bevorzugt weist das Füllelement 18 in Bereichen 11 der Formausnehmung mit reduzierter Materialstärke jeweils eine Mindestdicke auf, die mindestens dem Maß der Materialstärkenreduktion des Werkstücks 10 in diesem Bereich entspricht. Das Werkstück 10 bildet so mit dem Füllelemente 18 die zuvor beschriebene ebene Andruckfläche 19, so dass beim Umformvorgang grundsätzlich ein flächiger Kontakt zwischen Oberwerkzeug 14 und dem Werkstück 10 bzw. dem Füllelement 18 gewährleistet ist.More preferably, the filling element 18 has a minimum thickness in regions 11 of the mold recess with reduced material thickness, which corresponds at least to the extent of the material thickness reduction of the workpiece 10 in this region. The workpiece 10 thus forms the previously described flat contact surface 19 with the filling element 18, so that during the forming process a flat contact between the upper tool 14 and the workpiece 10 or the filling element 18 is guaranteed.

Das Füllelement 18 wird daher derart erstellt, dass dieses, in der Formausnehmung angeordnet, unter Bildung der zumindest im Wesentlichen glatten Andruckfläche 19 mit der Oberseite 20 des Werkstücks 10 bündig abschließt.The filling element 18 is therefore created in such a way that, when arranged in the mold recess, it terminates flush with the upper side 20 of the workpiece 10 while forming the at least substantially smooth contact surface 19 .

Gemäß einer bevorzugten - in der Zeichnung nicht gezeigten - Weiterbildung der Erfindung ist vorgesehen, dass das Füllelement in vorgegebenen Überhöhungsbereichen gegenüber der Andruckfläche 19 vorspringend erstellt wird. Das Werkstück 10 weist abhängig von der jeweiligen lokalen Materialstärke ein unterschiedliches Rücksprungverhalten auf. In Abhängigkeit der jeweiligen lokalen Materialstärke sowie des gewählten Biegeradius federt das Material des Werkstücks nach dem Umformvorgang unterschiedlich stark zurück.According to a preferred further development of the invention--not shown in the drawing--it is provided that the filling element is created so as to project in predetermined areas of elevation in relation to the pressure surface 19. Depending on the respective local material thickness, the workpiece 10 has a different spring-back behavior. Depending on the respective local material thickness and the selected bending radius, the material of the workpiece springs back to varying degrees after the forming process.

Dieses Rücksprungverhalten wird erfindungsgemäß vor dem Umformvorgang simulativ ermittelt und anhand dieser Simulation das Rücksprungverhalten des gesamten umzuformenden Werkstücks 10 prognostiziert. Auf Basis dieser Prognose werden anschließend die Überhöhungsbereiche bestimmt, an denen das Füllelement entsprechend breiter auszuführen ist, so dass dieses die genannten Überhöhungsbereiche aufweist. In diesen Überhöhungsbereichen wird so gegenüber den restlichen Bereichen des Füllelements eine erhöhte Eintauchtiefe erzielt und auf diese Weise in den Überhöhungsbereichen die auf das Werkstück ausgeübte Kraft gegenüber den restlichen Bereichen beim Biegevorgang vergrößert. Im Ergebnis wird das Werkstück 10 lokal an den Stellen der Überhöhungsbereiche soweit stärker gebogen, dass das Rücksprungverhalten des Materials kompensiert wird und das Werkstück 10 in allen Bereichen exakt in die gewünschte Endform umgeformt wird.According to the invention, this spring-back behavior is determined in a simulation before the forming process, and the spring-back behavior of the entire workpiece 10 to be formed is predicted using this simulation. On the basis of this prognosis, the areas of elevation are then determined at which the filling element is to be made correspondingly wider, so that it has the areas of elevation mentioned. An increased immersion depth is achieved in these areas of elevation compared to the remaining areas of the filling element, and in this way the force exerted on the workpiece is increased in the areas of elevation compared to the remaining areas during the bending process. As a result, the workpiece 10 is bent locally at the points of the raised areas to such an extent that the spring-back behavior of the material is compensated for and the workpiece 10 is formed exactly into the desired final shape in all areas.

Zur Bestimmung der Überhöhungsbereiche kommt beispielsweise eine Prozesssimulation unter Verwendung eines Programmes zur Analyse mittels Finite-Elemente-Methode (FEM) zum Einsatz. Durch Modellierung der Geometrie des Oberwerkzeugs 14 und des Maschinenbetts 13 sowie der Materialeigenschaften des Werkstücks 10 und des Füllelements 18 kann der Biegevorgang simuliert und so die Gesamtgeometrie des Füllelements 18 so ermittelt werden, dass die genannten exakten Umformergebnisse erzielt werden.For example, a process simulation using a program for analysis using the finite element method (FEM) is used to determine the superelevation areas. By modeling the geometry of the upper tool 14 and the machine bed 13 and the material properties of the workpiece 10 and the filling element 18, the bending process can be simulated and the overall geometry of the filling element 18 can be determined in such a way that the exact forming results mentioned are achieved.

Wie bereits zuvor ausgeführt, wird das Füllelement 18 auf Basis der ermittelten Geometrie des Füllelements 18 vorzugsweise aus dem Vollen gefräst. Alternativ und/oder in Ergänzung ist es möglich, zum Erstellen der Überhöhungsbereiche eine druckfeste Folie auf der Andruckfläche 19 des Füllelements anzuordnen und so die Materialstärke des Füllelements 18 in den jeweiligen Überhöhungsbereichen entsprechend anzupassen. Weiter bevorzugt wird die Folie auf die Andruckfläche 19 des Füllelements 18 aufgeklebt und so gegen unerwünschtes Verrutschen gesichert.As already explained above, the filling element 18 is preferably milled from the solid on the basis of the determined geometry of the filling element 18 . Alternatively and/or in addition, it is possible to arrange a pressure-resistant film on the pressure surface 19 of the filling element to create the elevation areas and thus adjust the material thickness of the filling element 18 accordingly in the respective elevation areas. More preferably, the film is glued to the pressure surface 19 of the filling element 18 and is thus secured against unwanted slipping.

Vorzugsweise wird das Füllelement 18 aus Acrylnitril-Butadien-Kunststoff (ABS) hergestellt. Dieses Material besitzt ein E-Modul von 2400 MPa und weist so die erforderliche Flexibilität auf, um sich einerseits während des Umformvorgangs elastisch mitzuverformen und anderseits nach dem Ende des Umformvorgangs wieder seine ursprüngliche Form anzunehmen. Auf diese Weise kann das Füllelement 18 für eine Vielzahl von Umformungsvorgängen genutzt werden. Der ABS-Kunststoff weist vorzugsweise eine Härte von 90 shore auf und ist geeignet, zerspanend bearbeitet zu werden.The filling element 18 is preferably made of acrylonitrile butadiene plastic (ABS). This material has a modulus of elasticity of 2400 MPa and thus has the necessary flexibility to be elastically deformed during the forming process on the one hand and to assume its original shape again after the end of the forming process on the other. In this way, the filling element 18 can be used for a large number of forming processes. The ABS plastic preferably has a hardness of 90 shore and is suitable for being machined.

Alternativ kann das Füllelement 18 aus anderen Kunststoffen, Faserverbundwerkstoffen, Gießharz oder Federstahl hergestellt werden. Zur Herstellung des Füllelements 18 kommen neben der zerspanenden Bearbeitung je nach verwandtem Material auch Guss- oder Laminier-Verfahren zum Einsatz.Alternatively, the filling element 18 can be made of other plastics, fiber composite materials, cast resin or spring steel. In addition to machining, depending on the material used, casting or laminating methods are also used to produce the filling element 18 .

In Figur 3 ist eine weitere vorteilhafte Ausführung der erfindungsgemäßen Anordnung gezeigt Zwischen den Stützelementen 12 des Maschinenbetts 13 und dem Werkstück 10 ist ein federndes Stützflächenelement 21 angeordnet. Das Werkstück 10 ist also auf den mindestens zwei Stützelementen 12 über das federnde Stützflächenelemente 21 gelagert. Das Stützflächenelement 21 ist folglich als Federmaschinenbett ausgebildet und wird beim Umformvorgang des Werkstücks 10 elastisch mitverformt, stellt sich jedoch nach Abschluss des Biegevorgangs selbsttätig in seine ursprüngliche Form zurück. Durch das Stützflächenelement 21 wird das Werkstück 10 vollflächig gestützt.In figure 3 a further advantageous embodiment of the arrangement according to the invention is shown. A resilient support surface element 21 is arranged between the support elements 12 of the machine bed 13 and the workpiece 10 . The workpiece 10 is thus mounted on the at least two support elements 12 via the resilient support surface element 21 . The support surface element 21 is consequently designed as a spring machine bed and is elastically deformed during the forming process of the workpiece 10, but automatically returns to its original shape after the bending process is complete. The workpiece 10 is supported over its entire surface by the supporting surface element 21 .

Claims (9)

  1. Arrangement for changing the shape of a sheet-like workpiece (10), which has a mould recess formed by reducing the thickness of the material, comprising
    the workpiece (10),
    at least two spaced-apart supporting elements (12) designed for arranging the workpiece (10) on the machine bed (13),
    a forming device designed for forming the workpiece (10) into a final shape by step-by-step, repetitive free bending with an upper die (14), which is designed to be controllably lowerable from a waiting position into a forming position (15) for bending a part of the workpiece (10) as well as
    with positioning means which are designed for moving the position of the workpiece (10) relative to the machine bed (13) in at least one infeed direction,
    characterised in that
    the arrangement further comprises a filling element (18) adapted to the mould recess and designed to make up the material thickness which is designed to be arranged in the region of the mould recess before the workpiece (10) is formed into the final shape.
  2. Arrangement according to claim 1, characterised in that the filling element (18) is designed at least substantially as a negative form of the mould recess.
  3. Arrangement according to one of claims 1 or 2, characterised in that, in regions (11) of the mould recess with reduced material thickness, the filling element (18) has a minimum thickness in each case which corresponds at least to the amount of reduction in the material thickness of the workpiece (10) in this region.
  4. Arrangement according to any one of claims 1 to 3, characterised in that the filling element (18) is designed in such a manner that, when arranged in the mould recess, it finishes flush with the upper side (20) of the workpiece (10) forming an at least substantially smooth pressure surface (19).
  5. Arrangement according to claim 4, characterised in that the filling element (18) is designed so as to protrude with respect to the pressure surface (19) in predetermined raised regions.
  6. Arrangement according to claim 5, characterised in that a pressure-resistant foil is arranged on the pressure surface (19) for producing the raised regions.
  7. Arrangement according to claim 6, characterised in that the foil is joined to the pressure surface (19) by means of an adhesive bond.
  8. Arrangement according to any one of claims 1 to 7, characterised in that the filling element (18) is made of acrylonitrile butadiene styrene (ABS).
  9. Arrangement according to any one of claims 1 to 8, characterised in that a resilient supporting surface element (21) is arranged between the supporting elements (12) of the machine bed (13) and the workpiece (10).
EP19700802.2A 2019-01-15 2019-01-15 Arrangement for changing the shape of a sheet-like workpiece Active EP3731983B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP20199066.0A EP3778062B1 (en) 2019-01-15 2019-01-15 Method of changing the shape of a sheet-like workpiece

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2019/050955 WO2020147935A1 (en) 2019-01-15 2019-01-15 Method and arrangement for changing the shape of a sheet-like workpiece

Related Child Applications (2)

Application Number Title Priority Date Filing Date
EP20199066.0A Division-Into EP3778062B1 (en) 2019-01-15 2019-01-15 Method of changing the shape of a sheet-like workpiece
EP20199066.0A Division EP3778062B1 (en) 2019-01-15 2019-01-15 Method of changing the shape of a sheet-like workpiece

Publications (2)

Publication Number Publication Date
EP3731983A1 EP3731983A1 (en) 2020-11-04
EP3731983B1 true EP3731983B1 (en) 2022-06-08

Family

ID=65033596

Family Applications (2)

Application Number Title Priority Date Filing Date
EP19700802.2A Active EP3731983B1 (en) 2019-01-15 2019-01-15 Arrangement for changing the shape of a sheet-like workpiece
EP20199066.0A Active EP3778062B1 (en) 2019-01-15 2019-01-15 Method of changing the shape of a sheet-like workpiece

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP20199066.0A Active EP3778062B1 (en) 2019-01-15 2019-01-15 Method of changing the shape of a sheet-like workpiece

Country Status (12)

Country Link
US (1) US20220072596A1 (en)
EP (2) EP3731983B1 (en)
JP (1) JP2022515792A (en)
KR (1) KR20210091785A (en)
CN (1) CN113365754A (en)
BR (1) BR112021011416A2 (en)
CA (1) CA3121688A1 (en)
ES (1) ES2901694T3 (en)
IL (1) IL284601A (en)
RU (1) RU2763370C1 (en)
SG (1) SG11202106383PA (en)
WO (1) WO2020147935A1 (en)

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE584365C (en) * 1931-07-17 1933-09-19 E H Hugo Junkers Dr Ing Process for pressing recesses in sheet metal
US2377664A (en) * 1941-12-20 1945-06-05 Armstrong Cork Co Sheet metal shaping and shearing
JPS5118253A (en) * 1974-08-06 1976-02-13 Osaka Tetsuen Kikai Kk KOKANSEIKEIYO PURESUSOCHI
RU2149728C1 (en) * 1998-07-06 2000-05-27 Открытое акционерное общество "АВТОВАЗ" Method for drawing different-thickness welded sheet blank and die set for performing the same
US5956991A (en) * 1998-08-19 1999-09-28 Tseng; Shao-Chien Forming device for shaped decoration panels
RU2243049C2 (en) * 2002-07-22 2004-12-27 Ястребов Игорь Вадимович Method for part bending with large radius (variants)
JP2011194426A (en) * 2010-03-18 2011-10-06 Mitsubishi Heavy Ind Ltd Method of molding plate-shaped workpiece and molded article
CN102802829B (en) * 2010-03-18 2015-12-02 三菱重工业株式会社 The manufacturing process of plate workpiece and formed body
JP5916293B2 (en) * 2011-03-31 2016-05-11 三菱重工業株式会社 Molding method of plate workpiece
DE102011114927A1 (en) * 2011-10-06 2013-04-11 Lufthansa Technik Ag Method for roll bending of large curved sheets around outer skin of aircraft, involves bending metal sheets of specific meters long to minimum wide target radius, such that round bending takes place by multiple edges with circular die
JP6262166B2 (en) * 2014-03-31 2018-01-17 Ｊｆｅスチール株式会社 Bending press mold
JP6069385B2 (en) * 2015-02-27 2017-02-01 アイダエンジニアリング株式会社 Plate metal material bending apparatus and method
JP6308598B2 (en) * 2016-12-23 2018-04-11 アイダエンジニアリング株式会社 Plate metal material bending apparatus and method
CN110234445B (en) * 2017-01-31 2021-06-15 日轻金Act株式会社 Mold and processing method using same
CN106881570A (en) * 2017-03-17 2017-06-23 北京航星机器制造有限公司 A kind of manufacture method of the circular arc with muscle covering

Also Published As

Publication number Publication date
CN113365754A (en) 2021-09-07
KR20210091785A (en) 2021-07-22
WO2020147935A1 (en) 2020-07-23
IL284601A (en) 2021-08-31
CA3121688A1 (en) 2020-07-23
EP3731983A1 (en) 2020-11-04
US20220072596A1 (en) 2022-03-10
JP2022515792A (en) 2022-02-22
RU2763370C1 (en) 2021-12-28
EP3778062B1 (en) 2021-10-20
BR112021011416A2 (en) 2023-09-26
SG11202106383PA (en) 2021-07-29
EP3778062A1 (en) 2021-02-17
ES2901694T3 (en) 2022-03-23

Similar Documents

Publication Publication Date Title
DE69911994T2 (en) METHOD FOR MOLDING REINFORCED PARTS
DE102009003668B4 (en) Device and method for producing at least partially closed profiles or semi-finished products from a circuit board
DE112007000212T9 (en) Active reconfigurable stretch forming
DE102005041460A1 (en) Deforming tool system with punch, lower holder and mold, useful e.g. in processing metal sheet for automobile productions, has masks of different properties to produce different components of similar geometries
EP2111937A1 (en) Method for manufacturing sheet metal circuit boards varying in thickness
DE10303458A1 (en) Shaping method for thin metal sheet, involves finishing rough forming body to product shape using tool that moves three-dimensionally with mold punch as mold surface sandwiching sheet thickness while mold punch is kept under pushed state
DE102011050001A1 (en) Method and device for producing flangeless drawn parts
EP2701862B1 (en) Method and device for producing flanged drawn parts with simultaneous trimming
DE102007056358A1 (en) Forming tool e.g. deep drawing press, manufacturing method for deep-drawing processes, involves transforming metal part for forming tool form by shaping, where metal part is back filled for reinforcement and filled with material
DE19500245A1 (en) Design of jack contact surface in sheet metal press
EP2208551A2 (en) Method for producing a complex sheet metal part
DE102006015666A1 (en) Production of a metallic molded component, especially a chassis part, comprises forming the molded component from a semi-finished material by hot deforming and shearing the semi-finished material or molded component
WO2016020148A1 (en) Method for producing hot-formed components
DE102008012230A1 (en) Component e.g. prototype component, manufacturing tool for e.g. passenger car, has upper and lower parts designed in modular manner from cast iron, where upper part has matrix module and lower part has die and metal bracket modules
DE102006002146A1 (en) Sheet metal forming unit, comprises a holder for the edge of the sheet metal, a CNC guided forming mandrel, and a die
DE102017002257A1 (en) Method for commissioning a forming tool
EP3731983B1 (en) Arrangement for changing the shape of a sheet-like workpiece
DE102012023089B4 (en) Cold forming method and forming apparatus for cold forming
DE102006052696A1 (en) Plates or semi-finished product transforming method, involves producing negative pressure in die plate of tool half in relation to pressure of transforming medium between another tool half and semi-finished product
EP2662161B1 (en) Method for manufacturing a workpiece
DE102014216503A1 (en) Tool for the production of sheet metal part edges having sheet metal parts
DE102004029973A1 (en) Forming tool and method for its production
EP2221125B1 (en) Hydroforming tool
DE102016007037A1 (en) Method for producing a metalworking tool
DE102021125209A1 (en) Process and device for processing a flat, flat workpiece

Legal Events

Date Code Title Description
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: UNKNOWN

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE

PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

17P Request for examination filed

Effective date: 20200731

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: EXAMINATION IS IN PROGRESS

17Q First examination report despatched

Effective date: 20210610

RIN1 Information on inventor provided before grant (corrected)

Inventor name: WILKEN, EILERT

Inventor name: LAUTENBACH, SVEN

Inventor name: FRERICHS, HELMUT

Inventor name: HARMS, MICHAEL

Inventor name: BLAZEK, INGO

Inventor name: BRESTRICH, MARC

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: GRANT OF PATENT IS INTENDED

R17C First examination report despatched (corrected)

Effective date: 20210610

DAV Request for validation of the european patent (deleted)
DAX Request for extension of the european patent (deleted)
INTG Intention to grant announced

Effective date: 20211221

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE PATENT HAS BEEN GRANTED

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

REG Reference to a national code

Ref country code: AT

Ref legal event code: REF

Ref document number: 1496564

Country of ref document: AT

Kind code of ref document: T

Effective date: 20220615

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 502019004568

Country of ref document: DE

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: LANGUAGE OF EP DOCUMENT: GERMAN

REG Reference to a national code

Ref country code: LT

Ref legal event code: MG9D

REG Reference to a national code

Ref country code: NL

Ref legal event code: MP

Effective date: 20220608

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20220608

Ref country code: NO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20220908

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20220608

Ref country code: HR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20220608

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20220909

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20220608

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20220908

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: RS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20220608

Ref country code: LV

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20220608

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20220608

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SM

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20220608

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20220608

Ref country code: RO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20220608

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20221010

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20220608

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20220608

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20220608

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20220608

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20221008

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 502019004568

Country of ref document: DE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20220608

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20220608

26N No opposition filed

Effective date: 20230310

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20220608

P01 Opt-out of the competence of the unified patent court (upc) registered

Effective date: 20230508

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20230115

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20230115

REG Reference to a national code

Ref country code: BE

Ref legal event code: MM

Effective date: 20230131

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20230131

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20230115

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20230131

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20230131

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20230131

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20220608

Ref country code: IE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20230115

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20240104

Year of fee payment: 6

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20220608