EP1763412B1 - Flanging devce with a tilting system - Google Patents

Flanging devce with a tilting system Download PDF

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Publication number
EP1763412B1
EP1763412B1 EP05750494A EP05750494A EP1763412B1 EP 1763412 B1 EP1763412 B1 EP 1763412B1 EP 05750494 A EP05750494 A EP 05750494A EP 05750494 A EP05750494 A EP 05750494A EP 1763412 B1 EP1763412 B1 EP 1763412B1
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EP
European Patent Office
Prior art keywords
machine tool
tool according
tilting
actuator
bed
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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.)
Not-in-force
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EP05750494A
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German (de)
French (fr)
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EP1763412A1 (en
Inventor
Winfried Dahler
Ernst Deppert
Heinrich-Wolfram KÄSTNER
Thomas Lissmann
Reinhold Mertel
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GM Global Technology Operations LLC
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GM Global Technology Operations LLC
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Publication of EP1763412A1 publication Critical patent/EP1763412A1/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
    • B21D19/00—Flanging or other edge treatment, e.g. of tubes
    • B21D19/08—Flanging or other edge treatment, e.g. of tubes by single or successive action of pressing tools, e.g. vice jaws
    • 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
    • B21D39/02—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 by folding, e.g. connecting edges of a sheet to form a cylinder
    • 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
    • B21D39/02—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 by folding, e.g. connecting edges of a sheet to form a cylinder
    • B21D39/021—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 by folding, e.g. connecting edges of a sheet to form a cylinder for panels, e.g. vehicle doors

Definitions

  • the invention relates to the handling of workpieces when performing machining operations, in particular during beading.
  • Beading also called folding, falls within the scope of the non-cutting forming technique. This refers to the folding of an angled edge or a flanged flange of an outer sheet or a skin over an inner sheet or a skeleton. Sense of flanging is, if necessary, using adhesive at least two sheet metal parts or skin and skeletons firmly together. In automotive engineering, the process is mostly used on vehicle components such as hood, door, rear flap, rear compartment lid and roof.
  • flanging When flanging the contour of the component is determined. One differentiates between inside and outside flanging. When external flanging the outer contour of the component such. B. hood, door, rear flap, and rear space ceiling set. In the case of inner beading, the contour of window cut-outs such as roof or door is determined.
  • Beading has a decisive influence on the quality of installation of the components in the body in terms of gap and drop. Beading is often done in two to three steps. This is called tilting, pre and crimping.
  • the production part is moved in a special holding device, the so-called “crimping", against a stationary tool.
  • the manufacturing part is fixed in a mold and the tools move. It is also known to crimp with a movable and rotatable roller, this is called “Rollbördeln”.
  • Crimping devices are in the broader sense driven pressing tools.
  • the equipment is often driven hydraulically, pneumatically or electrically.
  • Beading jaws can be moved hydraulically, pneumatically or electrically via servo motors.
  • a crimping bed often forms the receptacle for the outer skin and skeleton. It is the exact 3D shape of the outer skin and thus a prerequisite for the required Fallungs37.
  • the bed is considered a basis or zero reference and requires no post-processing or training.
  • the crimping jaws or rabbets result in their working position an open or fully closed ring. At the crimping jaws or creasing the actual forming takes place, since therein the flange positions are pre-worked for pre and crimping.
  • the rows of jaws are arranged one above the other, in a single-stage, only one row of jaws is mounted either for pre- or finish crimping. Criterion for the one or two-stage is the cycle time of the manufacturing cell in connection with the drive of the device. Frequently, two-stage flanging devices are used.
  • pre- and finish flanging jaws are used one after the other. Due to the hydraulic lifting of the plunger, the flanging flange is folded over at the creasing blocks.
  • the two components, the skeleton and the skin, are positioned using the constrained guides and locating bolts after the basic alignment holes (ASKF). Hold-downs can secure the form-fitting contact with the skeleton on the outer skin immediately before the crimping process. With a hold-down device, the framework is pressed onto the skin before and during the crimping process and thus in the form of the crimping bed. This minimizes scaling errors and ensures the desired overlap of the flanging flange over the framework.
  • ASKF basic alignment holes
  • the EP 0 820 822 A1 and the WO 97/43165 show such machine tools that are used for folding or crimping of sheets.
  • the US Pat. No. 6,487,888 B1 shows a crimping press, which has a base and a movable nest on which a to be crimped Workpiece is received.
  • a nest carrier carries the nest, with both nest and nest support movably mounted on the base.
  • a laterally displaceable crimping jaw is mounted to the base and reciprocable between an extended position and a retracted position.
  • the JP 59 110 427 shows a Vorbördel sensible, in which a pre-crimping is initiated by vertically moving a crimping bed against a fixed metal skin.
  • the invention is intended to simplify the handling of workpieces when carrying out machining operations and to improve the work result.
  • the invention does not provide for a complicated flanging device or modified hold-down as would be conceivable in order to achieve a better working result. Rather, a simplification of the tilting devices previously used is provided.
  • at least one standard drive element and a slide, which has a Ankippformbacken directly on its front used.
  • the flange of a metal skin is processed.
  • drive elements for example, pneumatic cylinders, hydraulic cylinders, an armature of a coil or a spindle of an electric drive can be used. These drive elements can be operated without additional gearbox or without the intervention of a large-scale toggle mechanism.
  • the invention facilitates and improves tipping, in which only "critical areas" are processed on a separate tilting device (first stage).
  • the pre-crimping and finish crimping then takes place on the actual crimping press (second and third stages) and processes the complete crimp flange of the outer contour.
  • Cross areas can be present in sections with very small radii, large opening angles (greater than approx. 116 °) and also in parts where, unlike a given crimping position, the flanging flange must be crimped. An undesirable material thrust in the crimping press is avoided with the invention.
  • the invention avoids complicated built tilting units, which involve elaborate and rotated in three axes weldments. These designs require very complex designs and CAD studies and have not been proven.
  • brackets are provided for holding the tilting unit, which are part of the crimping bed.
  • cast-in consoles have proven themselves.
  • Guideways for the slides can be produced in one clamping already during the shaping of the flanging bed.
  • the invention thus makes it possible to provide tilting devices which are particularly easy to produce and which are considerably more cost-effective than those of the prior art. A cost saving of up to 40% per tilting device can be expected.
  • tilting devices provide numerous tilting units, often between six and ten. In the case of the extensive tilting devices of the prior art, this number could often not be provided for lack of space, so that a worse result with fewer tilting devices had to be accepted.
  • the invention is embodied in a machine tool designed as a processing device, which has the tilting unit.
  • a tilting unit With the tilting unit, a beading edge of a sheet metal skin is locally bent, for example, at a point that would tip in a non-intentional direction during subsequent beading.
  • a tilting unit is provided at a location where particularly small bending radii are to be generated.
  • the invention enables a cheap and less complex overall construction. With the invention, a standardization of the Ankippismeen within a tilting system is possible. These systems are no longer component-dependent and model-to-model.
  • the skin is tilted in a simple manner in the region of the crimping flange and thus a desired overlap of the crimping flange, e.g. ensured over the skeleton.
  • the tilting systems are attached to mechanically less complicated constructions.
  • the mechanical design specifications allow a low construction height and width.
  • the assembly is very easy due to the small size of the system. Ankippantriebe that are mounted on a far over the crimping cantilever frame, no longer need to be provided.
  • the skin is tilted in a simple manner in the region of the flanging flange and thus ensures a desired overlap of the flanging flange, for example via the framework.
  • All tilting units of the tilting device are in the home position, i. in the rear end position.
  • the two components, skeleton and skin, are inserted and positioned using the constrained guides, locating and locking pins after the basic alignment bores (ASKF).
  • the framework is pressed by means of tensioners into the skin and thus also into the bed of the tilting device.
  • hold-downs pivot precisely into the root of the flanged edge of the outer skin and hold it firmly in the sense of a chamfering jaw.
  • the pneumatic cylinder By the pneumatic cylinder, the slide is then driven with the attached mold jaws against the flare flange to the end position.
  • the necessary dimensional adjustment takes place via a threaded spindle on the piston rod.
  • the pneumatic cylinder, the hold-downs and centerings return to the basic position.
  • the tilting is completed and the part is taken out of the device and placed in the crimping press for further processing.
  • FIG. 1 shows a Verkzeugmaschine invention with a tilting device 1 in a view from the side.
  • the tilting device 1 is divided into a hemming bed 2 with a cast-on bracket 17 for a slide 7, in a welded construction 3 for receiving a pneumatic cylinder 5, in a fitting 9, in a guide 4 and in a piston rod with an adjusting unit 6.
  • the welded construction 3 constitutes a support for the pneumatic cylinder 5 and is fastened to the console 17 designed as a sprue.
  • a machined top 13 of the bracket 17 serves as a support for the guide 4 of the slider 7, which is connected to the piston rod 6 of the pneumatic cylinder 5.
  • a mold jaws 9 is provided at the front of the slider 7, .
  • FIG. 2 and FIG. 3 illustrate the forming of a flange 10 of the steel sheet skin 14th
  • the flare flange 10 of the steel sheet skin 14 is bent to an angle of more than 116 ° before the actuation of the tilting unit 1. After tilting the flare flange 10 is bent further, to an acute angle of about 70 °. This condition is shown by a dashed line.
  • FIG. 3 illustrates the effect of the mold jaw 9 at a displacement along the displacement direction 8. How to FIG. 3 Especially good is the front of the mold baking 9 edited so that the desired angular position of the crimping flange 10 is achieved after a stroke of the mold jaw 9. It wears the in FIG. 1 not shown down device 11 to an optimum Bördelraw.
  • the machine tool according to the invention can be produced particularly easily.
  • mounting surfaces for guiding the slides 9 are cast in the region of the tilting devices or tilting units to be provided corresponding to the number of "critical areas" of the sheet steel skin 14. The number of tilting units is to be determined depending on the component. These mounting surfaces are incorporated directly in the shaping of the crimping bed 2, which brings in relation to the previous production only a small additional effort with it. Guide rails with emergency running properties are mounted on these mounting surfaces. Also mounting surfaces for the welded construction for receiving the pneumatic cylinder are the same processed on the sprue or on the console 17. The slide 9 and the hold-down 11 are manufactured according to CAD / CAM data.
  • pneumatic cylinder 5 can be easily tilt forces of more than 4500 N generate.
  • the necessary thrust force is determined depending on the component.
  • the smallest possible angle of the flange 10 is sought.
  • a shaped piece in the form of a hold-down 11 is pressed into the so-called "root" 12.
  • this hold-down 11 prevents the tilting unintentional rolling or pulling the steel sheet skin, whereby the emergence of bulges is counteracted.
  • the hold-down 11 can be operated with a pivoting cylinder, not shown here, with a hydraulic cylinder, with a pneumatic cylinder, electrically or any kind of mechanical actuation.
  • the corresponding contact pressure is determined according to the respective requirements.
  • the installation of the hold-down can be both inside and outside of the crimping 2.
  • a welded construction as a supporting component of the hold-down drive is conceivable.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Wire Processing (AREA)
  • Tyre Moulding (AREA)
  • Mounting, Exchange, And Manufacturing Of Dies (AREA)

Abstract

The invention relates to a tilting system which comprises a tilting unit having an actuator. Said actuator has a slide which can be moved to and fro in a direction of displacement. The front of the slide is provided with a tilting molding segment for shaping the flared flange of a metal sheet.

Description

Die Erfindung betrifft die Handhabung von Werkstücken beim Vornehmen von Bearbeitungsvorgängen, insbesondere beim Bördeln.The invention relates to the handling of workpieces when performing machining operations, in particular during beading.

Das Bördeln, auch Falzen genannt, fällt in den Verfahrensbereich der spanlosen Umformtechnik. Darunter versteht man das Umlegen einer abgewinkelten Kante bzw. eines Bördelflansches eines äußeren Bleches bzw. einer Haut über ein inneres Blech bzw. über ein Gerippe. Sinn des Bördelns ist, ggf. unter Einsatz von Klebstoff mindestens zwei Blechteile bzw. Haut und Gerippe fest miteinander zu verbinden. Im Automobilbau kommt das Verfahren meist an Fahrzeugkomponenten wie Haube, Tür, Rückwandklappe, Heckraumdeckel und Dach zum Einsatz.Beading, also called folding, falls within the scope of the non-cutting forming technique. This refers to the folding of an angled edge or a flanged flange of an outer sheet or a skin over an inner sheet or a skeleton. Sense of flanging is, if necessary, using adhesive at least two sheet metal parts or skin and skeletons firmly together. In automotive engineering, the process is mostly used on vehicle components such as hood, door, rear flap, rear compartment lid and roof.

Bei dem Bördeln wird die Kontur des Bauteiles bestimmt. Man unterscheidet Innen- und Außenbördeln. Beim Außenbördeln wird die Außenkontur des Bauteils wie z. B. Haube, Tür, Rückwandklappe, und Heckraumdecke festgelegt. Beim Innenbördeln die Kontur von Fensterausschnitten wie Dach oder Tür festgelegt.When flanging the contour of the component is determined. One differentiates between inside and outside flanging. When external flanging the outer contour of the component such. B. hood, door, rear flap, and rear space ceiling set. In the case of inner beading, the contour of window cut-outs such as roof or door is determined.

Das Bördeln beeinflusst entscheidend die Einbauqualität der Komponenten in die Karosserie bezüglich Spaltmaß und Fallung. Gebördelt wird häufig in zwei bis drei Stufen bzw. Schritten. Dabei spricht man von Ankippen, Vor- und Fertigbördeln.Beading has a decisive influence on the quality of installation of the components in the body in terms of gap and drop. Beading is often done in two to three steps. This is called tilting, pre and crimping.

Es gibt mehrere unterschiedliche Bördelsysteme. Bei einer Ausführungsform wird das Fertigungsteil in einer besonderen Haltevorrichtung, dem sogenannten "Bördelbett", gegen ein feststehendes Werkzeug gefahren. Bei einer anderen Ausführungsform liegt das Fertigungsteil fest in einer Form und die Werkzeuge bewegen sich. Dabei ist es auch bekannt, mit einer beweglichen und drehbaren Rolle zu bördeln, dies wird "Rollbördeln" genannt.There are several different crimping systems. In one embodiment, the production part is moved in a special holding device, the so-called "crimping", against a stationary tool. In another embodiment, the manufacturing part is fixed in a mold and the tools move. It is also known to crimp with a movable and rotatable roller, this is called "Rollbördeln".

Bördelvorrichtungen sind im weiteren Sinn getriebene Presswerkzeuge. Der Antrieb der Anlagen erfolgt häufig hydraulisch, pneumatisch oder elektrisch. Vorzugsweise wird aus Gründen des notwendigen Pressdruckes der Stößel, der den Arbeitshub besorgt, hydraulisch bewegt. Bördelbacken können hydraulisch, pneumatisch oder elektrisch über Stellmotoren bewegt werden.Crimping devices are in the broader sense driven pressing tools. The equipment is often driven hydraulically, pneumatically or electrically. Preferably, for reasons of the necessary pressing pressure of the plunger, which provides the working stroke, moved hydraulically. Beading jaws can be moved hydraulically, pneumatically or electrically via servo motors.

Ein Bördelbett bildet häufig das Aufnahmewerkzeug für Außenhaut und Gerippe. Es ist die genaue 3D-Formabbildung der Außenhaut und damit Grundvoraussetzung für die geforderte Fallungsqualität. Das Bett wird als Basis bzw. Nullbezug angesehen und bedarf keiner Nachbearbeitung oder Einarbeitung.A crimping bed often forms the receptacle for the outer skin and skeleton. It is the exact 3D shape of the outer skin and thus a prerequisite for the required Fallungsqualität. The bed is considered a basis or zero reference and requires no post-processing or training.

Die Bördelbacken bzw. Falzsteine ergeben in ihrer Arbeitsposition einen offenen oder auch vollständig geschlossenen Ring. An den Bördelbacken bzw. Falzsteinen findet die eigentliche Umformung statt, da darin die Flanschpositionen zum Vor- und Fertigbördeln angearbeitet sind. Bei einer zweistufigen Bördelvorrichtung sind die Backenreihen übereinander angeordnet, in einer einstufigen ist nur eine Reihe Backen entweder zum Vor- oder zum Fertigbördeln montiert. Kriterium für die Ein- oder Zweistufigkeit ist die Taktzeit der Fertigungszelle in Verbindung mit der Antriebsart der Vorrichtung. Häufig werden zweistufige Bördelvorrichtungen eingesetzt.The crimping jaws or rabbets result in their working position an open or fully closed ring. At the crimping jaws or creasing the actual forming takes place, since therein the flange positions are pre-worked for pre and crimping. In a two-stage crimper, the rows of jaws are arranged one above the other, in a single-stage, only one row of jaws is mounted either for pre- or finish crimping. Criterion for the one or two-stage is the cycle time of the manufacturing cell in connection with the drive of the device. Frequently, two-stage flanging devices are used.

Bei zweistufigen Anlagen kommen nacheinander Vor- und Fertigbördelbacken zum Einsatz. Durch das hydraulische Heben des Stößels wird der Bördelflansch an den Falzsteinen umgelegt.For two-stage systems, pre- and finish flanging jaws are used one after the other. Due to the hydraulic lifting of the plunger, the flanging flange is folded over at the creasing blocks.

Die beiden Bauteile Gerippe und Haut werden mit Zwangseinweisern und Aufnahmebolzen nach den Grundausrichtungsbohrungen (ASKF) positioniert. Niederhalter können unmittelbar vor dem Bördelvorgang das formgenaue Aufliegen von dem Gerippe auf der Außenhaut sichern. Mit einem Niederhalter wird das Gerippe vor und während des Bördelvorganges auf die Haut und somit in Form des Bördelbettes gedrückt. Dadurch werden Fallungsfehler minimiert und die gewünschte Überlappung des Bördelflansches über das Gerippe sichergestellt.The two components, the skeleton and the skin, are positioned using the constrained guides and locating bolts after the basic alignment holes (ASKF). Hold-downs can secure the form-fitting contact with the skeleton on the outer skin immediately before the crimping process. With a hold-down device, the framework is pressed onto the skin before and during the crimping process and thus in the form of the crimping bed. This minimizes scaling errors and ensures the desired overlap of the flanging flange over the framework.

Die EP 0 820 822 A1 und die WO 97/43165 zeigen solche Werkzeugmaschinen, die zum Falzen bzw. Bördeln von Blechen verwendet werden.The EP 0 820 822 A1 and the WO 97/43165 show such machine tools that are used for folding or crimping of sheets.

Bei diesen Werkzeugmaschinen ist es von Nachteil, dass diese teuer und kompliziert aufgebaut sind. Weiterhin kann ein Bördeln nur nach einem genauen Einstellen der unterschiedlichen Teile der Werkzeugmaschine erfolgen, damit optimale Ergebnisse erzielt werden.In these machine tools, it is disadvantageous that they are expensive and complicated. Furthermore, beading can only be done after a precise adjustment of the different parts of the machine tool, so that optimum results are achieved.

Die US 6 487 888 B1 zeigt eine Bördelpresse, die eine Basis und ein bewegliches Nest aufweist, auf dem ein zu bördelndes Werkstück aufgenommen ist. Ein Nestträger trägt das Nest, wobei sowohl das Nest als auch der Nestträger beweglich auf der Basis montiert sind. Ein seitlich verschiebbarer Bördelbacken ist an der Basis montiert und zwischen einer ausgefahrenen Position und einer zurückgezogenen Position hin- und herfahrbar. Dazu ähnliche Vorrichtungen sind in der EP 1 402 968 A1 , welche der Basis für den Oberbegriff des Anspruchs 1 bildet, und in der US 6 182 492 B1 gezeigt.The US Pat. No. 6,487,888 B1 shows a crimping press, which has a base and a movable nest on which a to be crimped Workpiece is received. A nest carrier carries the nest, with both nest and nest support movably mounted on the base. A laterally displaceable crimping jaw is mounted to the base and reciprocable between an extended position and a retracted position. These similar devices are in the EP 1 402 968 A1 , which forms the basis for the preamble of claim 1, and in the US Pat. No. 6,182,492 B1 shown.

Die JP 59 110 427 zeigt eine Vorbördeleinrichtung, bei der ein Vorbördeln durch vertikales Verfahren eines Bördelbetts gegen eine feststehende Blechhaut eingeleitet wird.The JP 59 110 427 shows a Vorbördeleinrichtung, in which a pre-crimping is initiated by vertically moving a crimping bed against a fixed metal skin.

Mit der Erfindung soll die Handhabung von Werkstücken beim Vornehmen von Bearbeitungsvorgängen vereinfacht und das Arbeitsergebnis verbessert werden.The invention is intended to simplify the handling of workpieces when carrying out machining operations and to improve the work result.

Diese Aufgabe wird durch den Gegenstand des unabhängigen Patentanspruchs gelöst. Vorteilhafte Weiterbildungen ergeben sich aus den abhängigen Patentansprüchen.This object is solved by the subject matter of the independent claim. Advantageous developments emerge from the dependent claims.

Die Erfindung sieht nicht etwa eine kompliziert aufgebaute Bördelvorrichtung oder geänderte Niederhalter vor, wie es an sich denkbar wäre, um ein besseres Arbeitsergebnis zu erzielen. Vielmehr wird eine Vereinfachung der bisher eingesetzten Ankippvorrichtungen vorgesehen. Dazu werden mindestens ein Standard-Antriebselement und ein Schieber, der unmittelbar an seiner Vorderseite einen Ankippformbacken aufweist, eingesetzt. Damit wird der Bördelflansch einer Blechhaut bearbeitet. Als Antriebselemente können beispielsweise Pneumatikzylinder, Hydraulikzylinder, ein Anker einer Spule oder auch eine Spindel eines Elektroantriebs eingesetzt werden. Diese Antriebselemente können ohne zusätzliche Getriebe oder ohne dass etwa eine groß ausfallende Kniehebelmechanik zwischengeschaltet ist, betrieben werden.The invention does not provide for a complicated flanging device or modified hold-down as would be conceivable in order to achieve a better working result. Rather, a simplification of the tilting devices previously used is provided. For this purpose, at least one standard drive element and a slide, which has a Ankippformbacken directly on its front, used. Thus, the flange of a metal skin is processed. As drive elements, for example, pneumatic cylinders, hydraulic cylinders, an armature of a coil or a spindle of an electric drive can be used. These drive elements can be operated without additional gearbox or without the intervention of a large-scale toggle mechanism.

Es hat sich herausgestellt, dass die Erfindung das Ankippen erleichtert und verbessert, bei dem nur "kritische Bereiche" auf einer separaten Ankippvorrichtung (erste Stufe) bearbeitet werden. Das Vor- und Fertigbördeln erfolgt erst danach auf der eigentlichen Bördelpresse (zweite und dritte Stufe) und bearbeitet den kompletten Bördelflansch der Außenkontur.It has been found that the invention facilitates and improves tipping, in which only "critical areas" are processed on a separate tilting device (first stage). The pre-crimping and finish crimping then takes place on the actual crimping press (second and third stages) and processes the complete crimp flange of the outer contour.

"Kritische Bereiche" können in Teilabschnitten mit sehr kleinen Radien, großen Öffnungswinkeln (größer als ca. 116°) vorliegen und auch bei Teilen, bei denen abweichend zu einer vorgegebenen Bördellage der Bördelflansch gebördelt werden muss. Ein unerwünschter Materialschub in der Bördelpresse wird mit der Erfindung vermieden."Critical areas" can be present in sections with very small radii, large opening angles (greater than approx. 116 °) and also in parts where, unlike a given crimping position, the flanging flange must be crimped. An undesirable material thrust in the crimping press is avoided with the invention.

Zudem besteht bei Radien oder Bördelflanschwinkelstellungen von weniger als ca. 116° sowie bei ungünstigem Formverlauf am Umriss, auch abhängig von der Lage des Bauteils im Bördelbett, die Möglichkeit, dass ein Fügen des Gerippes in die Haut mittels "Overhead" oder Roboter nicht gegeben ist. Auch in solchen Bereichen hat es sich bewährt, erfindungsgemäß anzukippen.In addition, there is the possibility that a joining of the skeleton in the skin by means of "overhead" or robot is not given for radii or flange flanges angle of less than about 116 ° and unfavorable shape curve on the outline, also depending on the position of the component in the crimp , Even in such areas, it has been proven to tilt according to the invention.

Die Erfindung vermeidet kompliziert aufgebaute Ankippeinheiten, die aufwendige und in drei Achsen gedrehte Schweißkonstruktionen beinhalten. Diese Konstruktionen erfordern sehr aufwendige Konstruktionen und CAD-Untersuchungen und haben sich nicht bewährt.The invention avoids complicated built tilting units, which involve elaborate and rotated in three axes weldments. These designs require very complex designs and CAD studies and have not been proven.

Erfindungsgemäß sind Konsolen zur Halterung der Ankippeinheit vorgesehen, die Bestandteil des Bördelbetts sind. Besonders haben sich dabei angegossene Konsolen bewährt. Führungen für die Schieber können dabei in einer Aufspannung bereits bei der Formbearbeitung des Bördelbetts hergestellt werden. Mit der Erfindung lassen sich somit besonders einfach herzustellende Ankippvorrichtungen bereitstellen, die wesentlich kostengünstiger sind, als diejenigen des Standes der Technik. Es ist mit einer Kostenersparnis von bis zu 40% pro Ankippvorrichtung zu rechnen.According to the invention brackets are provided for holding the tilting unit, which are part of the crimping bed. In particular, cast-in consoles have proven themselves. Guideways for the slides can be produced in one clamping already during the shaping of the flanging bed. The invention thus makes it possible to provide tilting devices which are particularly easy to produce and which are considerably more cost-effective than those of the prior art. A cost saving of up to 40% per tilting device can be expected.

Dies macht sich besonders deshalb bemerkbar, weil an vielen Ankippvorrichtungen zahlreiche Ankippeinheiten vorzusehen sind, häufig zwischen sechs und zehn Stück. Bei den ausladenden Ankippvorrichtungen des Standes der Technik konnte diese Zahl häufig aus Platzmangel nicht bereitgestellt werden, so dass man ein schlechteres Ergebnis mit weniger Ankippvorrichtungen in Kauf nehmen musste.This is particularly noticeable because many tilting devices provide numerous tilting units, often between six and ten. In the case of the extensive tilting devices of the prior art, this number could often not be provided for lack of space, so that a worse result with fewer tilting devices had to be accepted.

Die Erfindung ist in einer als Bearbeitungsvorrichtung ausgebildeten Werkzeugmaschine verwirklicht, die die Ankippeinheit aufweist. Mit der Ankippeinheit wird ein Bördelrand einer Blechhaut lokal umgebogen, beispielsweise an einer Stelle, die beim anschließenden Bördeln in eine nicht gewollte Richtung kippen würde. Außerdem wird eine Ankippeinheit an einer Stelle vorgesehen, bei der besonders kleine Biegeradien erzeugt werden sollen.The invention is embodied in a machine tool designed as a processing device, which has the tilting unit. With the tilting unit, a beading edge of a sheet metal skin is locally bent, for example, at a point that would tip in a non-intentional direction during subsequent beading. In addition, a tilting unit is provided at a location where particularly small bending radii are to be generated.

Die Erfindung ermöglicht eine günstige und wenig aufwendige Gesamtkonstruktion. Mit der Erfindung ist eine Standardisierung der Ankippeinheiten innerhalb eines Ankippsystems möglich. Diese Systeme sind nicht mehr bauteilabhängig und von Modell zu Modell gleich.The invention enables a cheap and less complex overall construction. With the invention, a standardization of the Ankippeinheiten within a tilting system is possible. These systems are no longer component-dependent and model-to-model.

Mit dem Ankippsystem wird die Haut auf einfache Weise im Bereich des Bördelflansches angekippt und so eine gewünschte Überlappung des Bördelflansches z.B. über das Gerippe sichergestellt.With the tilting system, the skin is tilted in a simple manner in the region of the crimping flange and thus a desired overlap of the crimping flange, e.g. ensured over the skeleton.

Die Ankippsysteme werden an mechanisch wenig aufwendigen Konstruktionen angebracht. Die mechanischen Konstruktionsvorgaben erlauben eine geringe Aufbauhöhe und -breite. Die Montage ist durch die geringe Größe des Systems sehr einfach. Ankippantriebe, die an einem über die Bördelvorrichtung weit auskragendem Halterahmen montiert sind, brauchen nicht mehr vorgesehen werden.The tilting systems are attached to mechanically less complicated constructions. The mechanical design specifications allow a low construction height and width. The assembly is very easy due to the small size of the system. Ankippantriebe that are mounted on a far over the crimping cantilever frame, no longer need to be provided.

Mit dem Ankippsystem wird die Haut auf einfache Weise im Bereich des Bördelflansches angekippt und so eine gewünschte Überlappung des Bördelflansches z.B. über das Gerippe sichergestellt.With the tilting system, the skin is tilted in a simple manner in the region of the flanging flange and thus ensures a desired overlap of the flanging flange, for example via the framework.

Nachfolgend wird ein denkbarer Bördelvorgang mit einer erfindungsgemäßen Werkzeugmaschine beschrieben.Hereinafter, a conceivable crimping process with a machine tool according to the invention will be described.

Alle Ankippeinheiten der Ankippvorrichtung sind in Grundstellung, d.h. in der hinteren Endlage.All tilting units of the tilting device are in the home position, i. in the rear end position.

Die beiden Bauteile, Gerippe und Haut, werden eingelegt und mit Zwangseinweisern, Aufnahme- und Absteckbolzen nach den Grundausrichtungsbohrungen (ASKF) positioniert. Das Gerippe wird mittels Spanner in die Haut und somit auch in das Bett der Ankippvorrichtung gedrückt. In den kritischen Bereichen schwenken Niederhalter formgenau in die Wurzel der Bördelkante der Außenhaut ein und halten diese im Sinne eines Abkantungsbackens fest. Durch den Pneumatikzylinder wird der Schieber mit dem aufgesetzten Formbacken anschließend gegen den Bördelflansch bis auf Endlage gefahren. Die notwendige Maßeinstellung erfolgt über eine Gewindespindel an der Kolbenstange. Der Pneumatikzylinder, die Niederhalter und Zentrierungen fahren in die Grundstellung zurück. Damit ist der Ankippvorgang abgeschlossen und das Teil wird aus der Vorrichtung genommen und in die Bördelpresse zur weiteren Bearbeitung eingelegt.The two components, skeleton and skin, are inserted and positioned using the constrained guides, locating and locking pins after the basic alignment bores (ASKF). The framework is pressed by means of tensioners into the skin and thus also into the bed of the tilting device. In the critical areas hold-downs pivot precisely into the root of the flanged edge of the outer skin and hold it firmly in the sense of a chamfering jaw. By the pneumatic cylinder, the slide is then driven with the attached mold jaws against the flare flange to the end position. The necessary dimensional adjustment takes place via a threaded spindle on the piston rod. The pneumatic cylinder, the hold-downs and centerings return to the basic position. Thus, the tilting is completed and the part is taken out of the device and placed in the crimping press for further processing.

Die Erfindung ist in der Zeichnung anhand eines Ausführungsbeispiels veranschaulicht.

Figur 1
zeigt einen Teilbereich einer erfindungs-gemäßen Werkzeugmaschine in der Seitenansicht,
Figur 2
zeigt einen Teilbereich eines zu bördelnden Stahlblechs und
Figur 3
zeigt einen weiteren Teilbereich der erfindungsgemäßen Werkzeugmaschine aus Figur 1.
The invention is illustrated in the drawing using an exemplary embodiment.
FIG. 1
shows a partial region of a machine tool according to the invention in a side view,
FIG. 2
shows a portion of a steel sheet to be flanged and
FIG. 3
shows a further portion of the machine tool according to the invention FIG. 1 ,

Figur 1 zeigt eine erfindungsgemäße Verkzeugmaschine mit eines Ankippvorrichtung 1 in einer Ansicht von der Seite. Die Ankippvorrichtung 1 gliedert sich in ein Bördelbett 2 mit einer angegossenen Konsole 17 für einen Schieber 7, in eine Schweißkonstruktion 3 zur Aufnahme eines Pneumatikzylinders 5, in ein Formstück 9, in eine Führung 4 und in eine Kolbenstange mit einer Verstelleinheit 6. FIG. 1 shows a Verkzeugmaschine invention with a tilting device 1 in a view from the side. The tilting device 1 is divided into a hemming bed 2 with a cast-on bracket 17 for a slide 7, in a welded construction 3 for receiving a pneumatic cylinder 5, in a fitting 9, in a guide 4 and in a piston rod with an adjusting unit 6.

Auf das Bördelbett 2 ist eine Stahlblechhaut 14 aufgelegt. Die Schweißkonstruktion 3 stellt eine Halterung für den Pneumatikzylinder 5 dar und ist an der als Anguss ausgestalteten Konsole 17 befestigt.On the hemming bed 2 a sheet steel skin 14 is placed. The welded construction 3 constitutes a support for the pneumatic cylinder 5 and is fastened to the console 17 designed as a sprue.

Eine bearbeitete Oberseite 13 der Konsole 17 dient dabei als Auflage für die Führung 4 des Schiebers 7, der mit der Kolbenstange 6 des Pneumatikzylinders 5 verbunden ist. An der Vorderseite des Schiebers 7 ist ein Formbacken 9 vorgesehen.A machined top 13 of the bracket 17 serves as a support for the guide 4 of the slider 7, which is connected to the piston rod 6 of the pneumatic cylinder 5. At the front of the slider 7, a mold jaws 9 is provided.

Figur 2 und Figur 3 veranschaulichen das Umformen eines Bördelflansches 10 der Stahlblechhaut 14. FIG. 2 and FIG. 3 illustrate the forming of a flange 10 of the steel sheet skin 14th

Wie man in Figur 2 sieht, ist der Bördelflansch 10 der Stahlblechhaut 14 vor der Betätigung der Ankippeinheit 1 auf einen Winkel von mehr als 116° abgekantet. Nach dem Ankippvorgang ist der Bördelflansch 10 weiter zugebogen, und zwar zu einem spitzen Winkel von ca. 70°. Dieser Zustand ist mit gestrichelter Linie dargestellt.How to get in FIG. 2 sees, the flare flange 10 of the steel sheet skin 14 is bent to an angle of more than 116 ° before the actuation of the tilting unit 1. After tilting the flare flange 10 is bent further, to an acute angle of about 70 °. This condition is shown by a dashed line.

Figur 3 veranschaulicht dabei die Wirkung des Formbackens 9 bei einer Verschiebung entlang der Verschieberichtung 8. Wie man in Figur 3 besonders gut sieht, ist die Vorderseite des Formbackens 9 so bearbeitet, dass die gewünschte Winkelstellung des Bördelflansches 10 nach einem Hub des Formbackens 9 erreicht wird. Dabei trägt der in Figur 1 nicht gezeigte Niederhalter 11 zu einem optimalen Bördelergebnis bei. FIG. 3 illustrates the effect of the mold jaw 9 at a displacement along the displacement direction 8. How to FIG. 3 Especially good is the front of the mold baking 9 edited so that the desired angular position of the crimping flange 10 is achieved after a stroke of the mold jaw 9. It wears the in FIG. 1 not shown down device 11 to an optimum Bördelergebnis.

Mit der Erfindung entfallen schiebekraftverstärkeride Kniehebel an etwaigen Aktuatoren, wodurch die erfindungsgemäße Ankippeinheit 1 bei besonders kleinem Bauraum und mit direkter Krafteinwirkung ausgeführt werden kann.With the invention omitted sliding force amplifier knee lever on any actuators, whereby the tilting unit 1 according to the invention can be performed in a particularly small space and with direct force.

Die erfindungsgemäße Werkzeugmaschine lässt sich besonders einfach herstellen.The machine tool according to the invention can be produced particularly easily.

Am aus Stahl gegossenen Bördelbett 2 werden im Bereich der vorzusehenden Ankippvorrichtungen bzw. Ankippeinheiten entsprechend der Anzahl der "kritischen Bereiche" der Stahlblechhaut 14 Montageflächen zur Führung der Schieber 9 angegossen. Die Anzahl der Ankippeinheiten ist bauteilabhängig jeweils zu bestimmen. Diese Montageflächen werden gleich bei der Formbearbeitung des Bördelbetts 2 mitbearbeitet, was im Verhältnis zur der bisherigen Herstellung nur noch einen geringen Zusatzaufwand mit sich bringt. Auf diesen Montageflächen werden Führungsleisten mit Notlaufeigenschaften montiert. Auch Anschraubflächen für die Schweißkonstruktion zur Aufnahme des Pneumatikzylinders werden gleich an dem Anguss bzw. an der Konsole 17 mitbearbeitet. Der Schieber 9 und der Niederhalter 11 werden nach CAD/CAM-Daten gefertigt.On cast steel crimping bed 2, mounting surfaces for guiding the slides 9 are cast in the region of the tilting devices or tilting units to be provided corresponding to the number of "critical areas" of the sheet steel skin 14. The number of tilting units is to be determined depending on the component. These mounting surfaces are incorporated directly in the shaping of the crimping bed 2, which brings in relation to the previous production only a small additional effort with it. Guide rails with emergency running properties are mounted on these mounting surfaces. Also mounting surfaces for the welded construction for receiving the pneumatic cylinder are the same processed on the sprue or on the console 17. The slide 9 and the hold-down 11 are manufactured according to CAD / CAM data.

Mit dem in Figur 1 gezeigten Pneumatikzylinder 5 lassen sich auf einfache Weise Ankippkräfte von mehr als 4500 N erzeugen. Die notwendige Schubkraft wird bauteilabhängig ermittelt. Dabei wird der kleinstmögliche Anstellwinkel des Bördelflansches 10 angestrebt. Bei der erfindungsgemäßen Bördelvorrichtung wird ein exaktes Anstellen bzw. Ankippen gewährleistet, wodurch sich ein genauer Bördelkantenverlauf ergibt. Hierzu wird in die sogenannte "Wurzel" 12 ein Formstück in Form eines Niederhalters 11 gedrückt.With the in FIG. 1 shown pneumatic cylinder 5 can be easily tilt forces of more than 4500 N generate. The necessary thrust force is determined depending on the component. The smallest possible angle of the flange 10 is sought. In the crimping device according to the invention is a ensures exact pitching or tilting, resulting in a precise flanging edge course. For this purpose, a shaped piece in the form of a hold-down 11 is pressed into the so-called "root" 12.

In der Wurzel 12 verhindert dieser Niederhalter 11 beim Ankippvorgang das ungewollte Einrollen oder das Einziehen der Stahlblechhaut, wodurch dem Entstehen von Wölbungen entgegengewirkt wird. Der Niederhalter 11 kann mit einem hier nicht gezeigten Schwenkspannzylinder, mit einem Hydraulikzylinder, mit einem Pneumatikzylinder, elektrisch oder jeglicher Art von mechanischer Betätigung betrieben werden. Die entsprechende Anpresskraft wird nach den jeweiligen Anforderungen ermittelt. Der Einbau der Niederhalter kann sowohl innerhalb als auch außerhalb des Bördelbetts 2 liegen. Außerdem ist es denkbar, den Drehpunkt oder die Befestigungsstelle des Niederhalters 11 gleich in die Gussform des Bördelbetts 2 mit einzuarbeiten. Schließlich ist auch eine Schweißkonstruktion als tragendes Bauteil des Niederhalterantriebs denkbar.In the root 12, this hold-down 11 prevents the tilting unintentional rolling or pulling the steel sheet skin, whereby the emergence of bulges is counteracted. The hold-down 11 can be operated with a pivoting cylinder, not shown here, with a hydraulic cylinder, with a pneumatic cylinder, electrically or any kind of mechanical actuation. The corresponding contact pressure is determined according to the respective requirements. The installation of the hold-down can be both inside and outside of the crimping 2. In addition, it is conceivable to incorporate the fulcrum or the attachment point of the hold 11 immediately into the casting mold of the crimping bed 2. Finally, a welded construction as a supporting component of the hold-down drive is conceivable.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
Ankippeinheittilting unit
22
Bördelbettflanging
33
Schweißkonstruktion, Halter PneumatikzylinderWelded construction, holder pneumatic cylinder
44
Führung des SchiebersGuide the slider
55
Pneumatikzylinderpneumatic cylinder
66
Kolbenstange des Pneumatikzylinder mit VerstelleinheitPiston rod of the pneumatic cylinder with adjustment unit
77
Schieberpusher
88th
Verschieberichtungdisplacement direction
99
Formbackenforming jaws
1010
Bördelflanschbead flange
1111
NiederhalterStripper plate
1212
Wurzelbereich vom BördelflanschRoot area of the flare flange
1313
Führungsfläche des Schiebers auf der angegossenen KonsoleGuide surface of the slider on the cast console
1414
Blechteilsheet metal part
1717
Konsoleconsole

Claims (13)

  1. Machine tool comprising a flanging bed (2), which is intended to receive a sheet metal skin (14), and at least one tilting unit (1),
    wherein the tilting unit (1) has the following features:
    - an actuator (5) having a slide (7) that is reciprocable in a direction of displacement (8),
    - fitted on the front of the slide (7) is a tilting forming die (9) for forming a border flange (10) of the sheet metal skin (14),
    - the front of the tilting forming die (9) is designed such that the border flange (10) is bendable by means of a displacement of the tilting forming die (9),
    characterized in that the tilting unit (1) is supported on brackets (17) that are integrally cast directly onto the bordering bed (2).
  2. Machine tool according to claim 1,
    characterized in that
    the actuator (5) comprises a pneumatic cylinder.
  3. Machine tool according to claim 1,
    characterized in that
    the actuator (5) comprises a hydraulic cylinder.
  4. Machine tool according to claim 1,
    characterized in that
    the actuator (5) comprises an armature of a coil.
  5. Machine tool according to claim 1,
    characterized in that
    the actuator (5) comprises a spindle of an electric drive.
  6. Machine tool according to one of claims 1 to 5,
    characterized in that
    an additional gear drive, a power transmission device or a power assistance device is provided.
  7. Machine tool according to one of claims 1 to 6,
    characterized in that
    for the actuator (5) a holder in the form of a welded structure (3) is provided.
  8. Machine tool according to claim 7,
    characterized in that
    for the actuator (5) the welded structure (3) comprises a casting.
  9. Machine tool according to one of the preceding claims,
    wherein in the region of the tilting unit (1) a holding-down device (11) for the sheet metal skin (14) is provided.
  10. Machine tool according to one of the preceding claims,
    characterized in that
    mounting surfaces for guide strips for the slide (9) are integrally cast in the bordering bed (2).
  11. Machine tool according to one of the preceding claims,
    characterized in that
    at least one holding-down device (11) for the sheet metal skin (14) is provided in the bordering bed (2).
  12. Machine tool according to one of the preceding claims,
    characterized in that
    a holding-down device (11) for the sheet metal skin (14) is provided externally on the bordering bed (2).
  13. Machine tool according to claim 11 or claim 12,
    characterized in that
    the fastening point of the holding-down device (11) is integrally cast on the bordering bed (2).
EP05750494A 2004-06-29 2005-06-08 Flanging devce with a tilting system Not-in-force EP1763412B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004031290A DE102004031290A1 (en) 2004-06-29 2004-06-29 Tilting system for a crimping device
PCT/EP2005/006122 WO2006000295A1 (en) 2004-06-29 2005-06-08 Tilting system for a flanging device

Publications (2)

Publication Number Publication Date
EP1763412A1 EP1763412A1 (en) 2007-03-21
EP1763412B1 true EP1763412B1 (en) 2008-08-13

Family

ID=34969858

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05750494A Not-in-force EP1763412B1 (en) 2004-06-29 2005-06-08 Flanging devce with a tilting system

Country Status (6)

Country Link
US (1) US20080083258A1 (en)
EP (1) EP1763412B1 (en)
CN (1) CN100484658C (en)
AT (1) ATE404304T1 (en)
DE (2) DE102004031290A1 (en)
WO (1) WO2006000295A1 (en)

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DE102006059962A1 (en) * 2006-12-19 2008-06-26 GM Global Technology Operations, Inc., Detroit Bending device and method for folding workpieces
DE102007025854B3 (en) * 2007-06-01 2008-10-16 Thyssenkrupp Drauz Nothelfer Gmbh Device for edge-side joining of sheets
DE102009060227B4 (en) * 2009-12-23 2018-04-19 Audi Ag Method for producing a component connection of a body component and adjusting unit
CN102062909B (en) * 2010-12-28 2012-03-07 索尔思光电（成都）有限公司 Pneumatic bending device for lock catch of optical module sheet metal part
US9216449B2 (en) 2011-12-22 2015-12-22 Caterpillar Inc. Controlled crimping method and system
CN103846329B (en) * 2012-11-30 2017-03-01 通用汽车环球科技运作有限责任公司 Roller crimping

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JPS59110427A (en) * 1982-12-15 1984-06-26 Nissan Motor Co Ltd Prehem die
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Also Published As

Publication number Publication date
EP1763412A1 (en) 2007-03-21
WO2006000295A1 (en) 2006-01-05
US20080083258A1 (en) 2008-04-10
CN100484658C (en) 2009-05-06
DE102004031290A1 (en) 2006-02-09
DE502005005043D1 (en) 2008-09-25
CN1972768A (en) 2007-05-30
ATE404304T1 (en) 2008-08-15

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