EP1763412A1 - Tilting system for a flanging device - Google Patents

Tilting system for a flanging device

Info

Publication number
EP1763412A1
EP1763412A1 EP05750494A EP05750494A EP1763412A1 EP 1763412 A1 EP1763412 A1 EP 1763412A1 EP 05750494 A EP05750494 A EP 05750494A EP 05750494 A EP05750494 A EP 05750494A EP 1763412 A1 EP1763412 A1 EP 1763412A1
Authority
EP
European Patent Office
Prior art keywords
tilting
actuator
tilting unit
flanging
unit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP05750494A
Other languages
German (de)
French (fr)
Other versions
EP1763412B1 (en
Inventor
Winfried Dahler
Ernst Deppert
Heinrich-Wolfram KÄSTNER
Thomas Lissmann
Reinhold Mertel
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.)
GM Global Technology Operations LLC
Original Assignee
GM Global Technology Operations LLC
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 GM Global Technology Operations LLC filed Critical GM Global Technology Operations LLC
Publication of EP1763412A1 publication Critical patent/EP1763412A1/en
Application granted granted Critical
Publication of EP1763412B1 publication Critical patent/EP1763412B1/en
Ceased legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • 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, remindwand ⁇ 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. There are several different crimping systems.
  • the production part is driven against a fixed tool in a special holding device, the so-called “crimping bed.”
  • the production part is fixed in a mold and the tools move to crimp a movable and rotatable roller, this is called “Roll ⁇ beading".
  • Flanging 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 crimping stones produce an open or even completely closed ring in their working position. At the crimping jaws or creasing the actual forming takes place, since therein the flange positions are pre-worked for pre and crimping.
  • a two-stage crimping device the rows of jaws are arranged one above the other, in a single-stage only one row of blocks is mounted either for pre-crimping or finish-crimping.
  • the criterion for the one- or two-stage is the cycle time of the manufacturing cell in connection with the drive type of the direction. Frequently, two-stage flanging devices are used.
  • pre- and finish flanging jaws are used successively. 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
  • EP 0 820 822 A1 and WO 97/43165 show such machine tools which are used for folding or flanging metal sheets.
  • the invention is intended to simplify the handling of workpieces when carrying out machining operations and to improve the work result. This object is achieved by the subject matter of the independent patent claims. Advantageous developments emerge from the dependent claims.
  • 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 preforming and finish flanging then takes place on the actual flanging press (second and third stage). and processes the complete flange of the outer contour.
  • “Critical areas” may be present in sections with very small radii, large opening angles (greater than approximately 116 °) and also in parts where, unlike a predetermined flanging position, the flanging flange has to be crimped Invention avoided.
  • radii or flanged flange positions of less than approximately 116 ° and, in the case of an unfavorable shape profile, the possibility also exists that the joining of the framework into the skin by means of overhead or robots is also dependent on the position of the component in the flanging bed. Even in such areas, it has been proven to tilt according to 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.
  • 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 substantially less expensive than those of the prior art. A cost saving of up to 40% per tilting device can be expected.
  • the invention is also embodied in a machine tool designed as a processing device, which has the tilting unit according to the invention.
  • a machine tool designed as a processing device, which has the tilting unit according to the invention.
  • 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 according to the invention 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 easily tilted in the region of the flanging flange, thus achieving a desired overlap of the flanging flange, e.g. ensured over the skeleton.
  • the tilting systems according to the invention 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 overlapping of the flanging flange, for example via the frame.
  • a tilting device according to the invention will be described.
  • All tilting units of the tilting device are in the basic position, i. in the rear end position.
  • the two components, skeleton and skin, are inserted and positioned with forced insertion guides, receiving 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.
  • holding-down devices swivel into the root of the crimping edge of the outer skin and retain it in the shape of an edging 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-down and centering drive back to the normal 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 partial region of a tilting device according to the invention in side view
  • FIG. 2 shows a portion of a steel sheet to be flanged and
  • FIG. 3 shows a further subregion of the tilting unit according to the invention from FIG. 1.
  • FIG. 1 shows a tilting device 1 according to the invention 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 represents a holder for the pneumatic cylinder 5 and is fastened to the bracket 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 Kol ⁇ 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 flange 10 of the steel sheet skin 14.
  • the flanging flange 10 of the steel sheet skin 14 is bent to an angle of more than 116 ° before 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 shaping jaw 9 during a displacement along the displacement direction 8.
  • the front side of the shaping jaw is 9 edited so that the desired angular position of the crimping flange 10 is achieved after a stroke of the mold jaw 9.
  • the holding-down device 11, not shown in FIG. 1 contributes to an optimum beading result.
  • the invention eliminates push-pull-strengthened toggle levers on any actuators, whereby the tilting unit 1 according to the invention can be designed with a particularly small installation space and with direct application of force.
  • the machine tool according to the invention can be produced particularly easily.
  • the number of "critical areas" of the steel sheet 14 is cast on the mounting surfaces for guiding the slides 9 in the area of the tilting bed 2 to be provided in the region of the tilting devices or tilting units to be provided, the number of tilting units being dependent on the component to be determined in each case.
  • These mounting surfaces are co-machined at the same time as the shaping of the crimping bed 2, which in relation to the previous production involves only a small additional expenditure Sprue or on the console 17.
  • the slider 9 and the hold 11 are manufactured according to CAD / CAM data.
  • pneumatic cylinder 5 With the example shown in Figure 1 pneumatic cylinder 5 'can be easily Ankipp mechanism of more than 4500 N produce.
  • 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 holding-down device 11 prevents the unintentional curling or drawing in of the steel sheet skin during the tilting process, which counteracts the occurrence of bulges.
  • 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.

Landscapes

  • 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)
  • Mounting, Exchange, And Manufacturing Of Dies (AREA)
  • Tyre Moulding (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

Ankippsystem für eine BördelVorrichtung Tilting system for a crimping device
B e s c h r e i b u n gDescription
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, Rückwand¬ klappe, 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, Rückwand¬ 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. 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 Ausfüh¬ rungsform 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 "Roll¬ bördeln" genannt.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. There are several different crimping systems. In one embodiment, the production part is driven against a fixed tool in a special holding device, the so-called "crimping bed." In another embodiment, the production part is fixed in a mold and the tools move to crimp a movable and rotatable roller, this is called "Roll¬ beading".
Bördelvorrichtungen sind im weiteren Sinn getriebene Press¬ werkzeuge. 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.Flanging 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 Arbeitspo- sition 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 Ba¬ cken entweder zum Vor- oder zum Fertigbördeln montiert. Kriterium für die Ein- oder Zweistufigkeit ist die Taktzeit der Fertigungszelle in Verbindung mit der Antriebsart der Vor- richtung. Häufig werden zweistufige Bördelvorrichtungen ein¬ gesetzt.The crimping jaws or crimping stones produce an open or even completely closed ring in their working position. 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 crimping device, the rows of jaws are arranged one above the other, in a single-stage only one row of blocks is mounted either for pre-crimping or finish-crimping. The criterion for the one- or two-stage is the cycle time of the manufacturing cell in connection with the drive type of the direction. Frequently, two-stage flanging devices are used.
Bei zweistufigen Anlagen kommen nacheinander Vor- und Fertig- bördelbacken 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 successively. 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 Al und die WO 97/43165 zeigen solche Werk¬ zeugmaschinen, die zum Falzen bzw. Bördeln von Blechen verwendet werden.EP 0 820 822 A1 and WO 97/43165 show such machine tools which are used for folding or flanging metal 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.
Mit der Erfindung soll die Handhabung von Werkstücken beim Vornehmen von Bearbeitungsvorgängen vereinfacht und das Ar- beitsergebnis verbessert werden. Diese Aufgabe wird durch den Gegenstand der unabhängigen Pa¬ tentansprüche gelöst. Vorteilhafte Weiterbildungen ergeben sich aus den abhängigen Patentansprüchen.The invention is intended to simplify the handling of workpieces when carrying out machining operations and to improve the work result. This object is achieved by the subject matter of the independent patent claims. 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 „kritischen 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 preforming and finish flanging then takes place on the actual flanging press (second and third stage). and processes the complete 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. Zudem besteht bei Radien oder Bördelflanschwinkelstellungen von weniger als ca. 116° sowie bei ungünstigem Formverlauf amümriss, 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."Critical areas" may be present in sections with very small radii, large opening angles (greater than approximately 116 °) and also in parts where, unlike a predetermined flanging position, the flanging flange has to be crimped Invention avoided. In addition, with radii or flanged flange positions of less than approximately 116 ° and, in the case of an unfavorable shape profile, the possibility also exists that the joining of the framework into the skin by means of overhead or robots is also dependent on the position of the component in the flanging bed. 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 kos¬ tengünstiger 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. 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 substantially less expensive 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. Die Erfindung ist auch in einer als Bearbeitungsvorrichtung ausgebildeten Werkzeugmaschine verwirklicht, die die erfin¬ dungsgemäße 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 erfindungsgemäße Ankippeinheit an einer Stelle vorgesehen, bei der besonders kleine Biegeradien erzeugt werden sollen.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. The invention is also embodied in a machine tool designed as a processing device, which has the tilting unit according to the invention. 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 according to the invention 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 erfindungsgemäßenAnkippsystemwird die Haut auf einfache Weise im Bereich des Bördel.flansches angekippt und so eine gewünschte Überlappung des Bördelflansches z.B. über das Gerippe sichergestellt.With the tilting system according to the invention, the skin is easily tilted in the region of the flanging flange, thus achieving a desired overlap of the flanging flange, e.g. ensured over the skeleton.
Die erfindungsgemäßen 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 according to the invention 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 erfindungsgemäßen 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. Nachfolgend wird ein denkbarer Bördelvorgang mit einer erfin¬ dungsgemäßen Ankippvorrichtung beschrieben.With the tilting system according to the invention, the skin is tilted in a simple manner in the region of the flanging flange and thus ensures a desired overlapping of the flanging flange, for example via the frame. Hereinafter, a conceivable crimping process with a tilting device according to the invention will be described.
Alle Ankippeinheiten der Ankippvorrichtung sind in Grundstel- lung, d.h. in der hinteren Endlage.All tilting units of the tilting device are in the basic 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 Ab- kantungsbackens 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 Kol¬ benstange. Der Pneumatikzylinder, die Niederhalter und Zent¬ rierungen 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 with forced insertion guides, receiving 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, holding-down devices swivel into the root of the crimping edge of the outer skin and retain it in the shape of an edging 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-down and centering drive back to the normal 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 Ausführungs- beispiels veranschaulicht.The invention is illustrated in the drawing using an exemplary embodiment.
Figur 1 zeigt einen Teilbereich einer erfindungs¬ gemäßen Ankippvorrichtung in der Seiten¬ ansicht,FIG. 1 shows a partial region of a tilting device according to the invention in side view,
Figur 2 zeigt einen Teilbereich eines zu bördelnden Stahlblechs und Figur 3 zeigt einen weiteren Teilbereich der er¬ findungsgemäßen Ankippeinheit aus Figur 1.Figure 2 shows a portion of a steel sheet to be flanged and FIG. 3 shows a further subregion of the tilting unit according to the invention from FIG. 1.
Figur 1 zeigt eine erfindungsgemäße 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 tilting device 1 according to the invention 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 Pneu¬ matikzylinder 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 represents a holder for the pneumatic cylinder 5 and is fastened to the bracket 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 Kol¬ benstange 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 Kol¬ 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 Bör¬ delflansches 10 der Stahlblechhaut 14.FIG. 2 and FIG. 3 illustrate the forming of a flange flange 10 of the steel sheet skin 14.
Wie man in Figur 2 sieht, ist der Bördelflansch 10 der Stahl- blechhaut 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.As can be seen in FIG. 2, the flanging flange 10 of the steel sheet skin 14 is bent to an angle of more than 116 ° before 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 shaping jaw 9 during a displacement along the displacement direction 8. As can be seen particularly well in FIG. 3, the front side of the shaping jaw is 9 edited so that the desired angular position of the crimping flange 10 is achieved after a stroke of the mold jaw 9. In this case, the holding-down device 11, not shown in FIG. 1, contributes to an optimum beading result.
Mit der Erfindung entfallen schiebekraftverstärkeήde Kniehebel an etwaigen Aktuatoren, wodurch die erfindungsgemäße An¬ kippeinheit 1 bei besonders kleinem Bauraum und mit direkter Krafteinwirkung ausgeführt werden kann.The invention eliminates push-pull-strengthened toggle levers on any actuators, whereby the tilting unit 1 according to the invention can be designed with a particularly small installation space and with direct application of 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 ent¬ sprechend der Anzahl der „kritischen Bereiche" der Stahl¬ blechhaut 14 Montageflächen zur Führung der Schieber 9 ange¬ gossen. 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.The number of "critical areas" of the steel sheet 14 is cast on the mounting surfaces for guiding the slides 9 in the area of the tilting bed 2 to be provided in the region of the tilting devices or tilting units to be provided, the number of tilting units being dependent on the component to be determined in each case. These mounting surfaces are co-machined at the same time as the shaping of the crimping bed 2, which in relation to the previous production involves only a small additional expenditure Sprue or on the console 17. The slider 9 and the hold 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 example shown in Figure 1 pneumatic cylinder 5 'can be easily Ankippkräfte of more than 4500 N produce. 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 An¬ kippvorgang das ungewollte Einrollen oder das Einziehen der Stahlblechhaut, wodurch dem Entstehen von Wölbungen entgegen¬ gewirkt 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 holding-down device 11 prevents the unintentional curling or drawing in of the steel sheet skin during the tilting process, which counteracts the occurrence of bulges. 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.

Claims

Bezugszeichenliste1 Ankippeinheit 2 Bördelbett 3 Schweißkonstruktion, Halter Pneumatikzylinder 4 Führung des Schiebers 5 Pneumatikzylinder 6 Kolbenstange des Pneumatikzylinder mit Verstelleinheit 7 Schieber 8 Verschieberichtung 9 Formbacken 10 Bördelflansch 11 Niederhalter 12 Wurzelbereich vom Bördelflansch 13 Führungsfläche des Schiebers auf der angegossenen Konsole 14 Blechteil 17 Konsole Patentansprüche List of Reference Numbers 1 Tilting unit 2 Crimping bed 3 Welded construction, holder Pneumatic cylinder 4 Guide of slide 5 Pneumatic cylinder 6 Piston rod of pneumatic cylinder with adjustment unit 7 Slide 8 Displacement direction 9 Forming jaws 10 Flanging flange 11 Downholder 12 Root area of flanging flange 13 Guide surface of slide on cast-on bracket 14 Sheet metal part 17 Bracket Patent claims
1. Ankippeinheit (1) mit einem Aktuator (5), der einen in einer Verschieberichtung (8) hin- und her bewegbaren Schieber (7) aufweist, wobei an der einen Vorderseite des Schiebers (7) ein Ankippformbacken (9) für das Umformen eines Bördelflansches (10) einer Blechhaut (14) angebracht ist.1. tilting unit (1) with an actuator (5) having a in a direction of displacement (8) back and forth movable slide (7), wherein at the one front of the slide (7) a Ankippformbacken (9) for forming a flanging flange (10) of a metal skin (14) is mounted.
2. Ankippeinheit (1) nach Anspruch 1, dadurch gekennzeichnet, dass der Aktuator (5) einen Pneumatikzylinder aufweist.2. tilting unit (1) according to claim 1, characterized in that the actuator (5) comprises a pneumatic cylinder.
3. Ankippeinheit (1) nach Anspruch 1, dadurch gekennzeichnet, dass der Aktuator (5) einen Hydraulikzylinder aufweist.3. tilting unit (1) according to claim 1, characterized in that the actuator (5) has a hydraulic cylinder.
4. Ankippeinheit (1) nach Anspruch 1, dadurch gekennzeichnet, dass der Aktuator (5) einen Anker einer Spule aufweist.4. tilting unit (1) according to claim 1, characterized in that the actuator (5) has an armature of a coil.
5. Ankippeinheit (1) nach Anspruch 1, dadurch gekennzeichnet, dass der Aktuator (5) eine Spindel eines Elektroantriebs aufweist.5. tilting unit (1) according to claim 1, characterized in that the actuator (5) has a spindle of an electric drive.
6. Ankippeinheit (1) nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass ein zusätzliches Getriebe, eine Kraftumlenkung oder eine Kraftverstärkung eingesetzt wird.6. tilting unit (1) according to one of claims 1 to 5, characterized in that an additional gear, a power deflection or a power amplification is used.
7. Ankippeinheit (1) nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass eine Führungsfläche 13 bereits angegossen ist.7. tilting unit (1) according to one of claims 1 to 6, characterized in that a guide surface 13 is already molded.
8. Ankippeinheit (1) nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass für den Aktuator (5) ein als Schweißkonstruktion (3) ausgebildeter Halter vorgesehen ist. 8. tilting unit (1) according to one of claims 1 to 7, characterized in that for the actuator (5) designed as a welded construction (3) holder is provided.
9. Ankippeinheit (1) nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass für den Aktuator (5) die Schweißkonstruktion (3) ein Gussteil aufweist.9. tilting unit (1) according to one of claims 1 to 8, characterized in that for the actuator (5), the welded construction (3) comprises a casting.
10. Ankippeinheit (1) nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, dass die Halterung für den Aktuator (5) direkt an das Bördelbett (2) angegossen ist.10. tilting unit (1) according to one of claims 1 to 9, characterized in that the holder for the actuator (5) is cast directly on the hemming bed (2).
11. Ankippvorrichtung mit wenigstens einer Ankippeinheit (1) nach einem der vorhergehenden Ansprüche.11. tilting device with at least one tilting unit (1) according to one of the preceding claims.
12. Ankippvorrichtung nach Anspruch 11, dadurch gekennzeich¬ net, dass im Bereich der Ankippeinheit (1) ein Niederhalter (11) vorgesehen ist.12. tilting device according to claim 11, characterized gekennzeich¬ net, that in the region of the tilting unit (1) a hold-down (11) is provided.
13. Ankippvorrichtung nach Anspruch 11, dadurch gekennzeich¬ net, dass mindestens ein Niederhalter (11) im Bördelbett (2) der Ankippvorrichtung vorgesehen ist.13. tilting device according to claim 11, characterized gekennzeich¬ net, that at least one hold-down (11) in the flanging (2) of the tilting device is provided.
14. Ankippvorrichtung nach Anspruch 11, dadurch gekennzeich¬ net, dass mindestens ein Niederhalter (11) außen am Bör¬ delbett (2) der Ankippvorrichtung vorgesehen ist.14. tilting device according to claim 11, characterized gekennzeich¬ net, that at least one hold-down (11) on the outside of the Bör¬ delbett (2) of the tilting device is provided.
15. Ankippvorrichtung nach einem der Ansprüche 11 bis 14, dadurch gekennzeichnet, dass die Befestigungsstelle des Niederhalters (11) am Bördelbett (2) angegossen ist.15. tilting device according to one of claims 11 to 14, characterized in that the attachment point of the hold-down (11) is cast on the hemming bed (2).
16. Ankippvorrichtung nach einem der Ansprüche 11 bis 15, dadurch gekennzeichnet, dass die Ankippvorrichtung Alu¬ miniumblech aufweist. 16. tilting device according to one of claims 11 to 15, characterized in that the tilting device comprises aluminum sheet metal.
17. Werkzeugmaschine, insbesondere Bördelvorrichtung, mit wenigstens einer Ankippvorrichtung nach einem der vor¬ hergehenden Ansprüche. 17. Machine tool, in particular flanging device, with at least one tilting device according to one of vor¬ forthending claims.
EP05750494A 2004-06-29 2005-06-08 Flanging devce with a tilting system Ceased EP1763412B1 (en)

Applications Claiming Priority (2)

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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

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ATE404304T1 (en) 2008-08-15
CN100484658C (en) 2009-05-06
EP1763412B1 (en) 2008-08-13
CN1972768A (en) 2007-05-30
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US20080083258A1 (en) 2008-04-10
WO2006000295A1 (en) 2006-01-05

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