EP0623405A1 - Device for flanging cylindrical bodies by rolling - Google Patents

Device for flanging cylindrical bodies by rolling Download PDF

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Publication number
EP0623405A1
EP0623405A1 EP94106168A EP94106168A EP0623405A1 EP 0623405 A1 EP0623405 A1 EP 0623405A1 EP 94106168 A EP94106168 A EP 94106168A EP 94106168 A EP94106168 A EP 94106168A EP 0623405 A1 EP0623405 A1 EP 0623405A1
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EP
European Patent Office
Prior art keywords
rollers
flanging
limiting
bodies
flange
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
EP94106168A
Other languages
German (de)
French (fr)
Other versions
EP0623405B1 (en
Inventor
Norbert Dr.-Ing. Lentz
Dieter Muno
Harald Dipl.-Ing. Schmidt
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.)
SIG Plastics GmbH and Co KG
Original Assignee
Krupp Maschinentechnik GmbH
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Application filed by Krupp Maschinentechnik GmbH filed Critical Krupp Maschinentechnik GmbH
Publication of EP0623405A1 publication Critical patent/EP0623405A1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D19/00—Flanging or other edge treatment, e.g. of tubes
    • B21D19/02—Flanging or other edge treatment, e.g. of tubes by continuously-acting tools moving along the edge
    • B21D19/04—Flanging or other edge treatment, e.g. of tubes by continuously-acting tools moving along the edge shaped as rollers
    • B21D19/046—Flanging or other edge treatment, e.g. of tubes by continuously-acting tools moving along the edge shaped as rollers for flanging edges of tubular products
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D51/00—Making hollow objects
    • B21D51/16—Making hollow objects characterised by the use of the objects
    • B21D51/26—Making hollow objects characterised by the use of the objects cans or tins; Closing same in a permanent manner
    • B21D51/2615—Edge treatment of cans or tins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D51/00—Making hollow objects
    • B21D51/16—Making hollow objects characterised by the use of the objects
    • B21D51/26—Making hollow objects characterised by the use of the objects cans or tins; Closing same in a permanent manner
    • B21D51/2615—Edge treatment of cans or tins
    • B21D51/2623—Curling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D51/00—Making hollow objects
    • B21D51/16—Making hollow objects characterised by the use of the objects
    • B21D51/26—Making hollow objects characterised by the use of the objects cans or tins; Closing same in a permanent manner
    • B21D51/2615—Edge treatment of cans or tins
    • B21D51/263—Flanging

Definitions

  • the invention relates to a device for roller flanging at least in the edge region of cylindrical bodies, with a plurality of flanging rollers, which are rotatably mounted in a receptacle and roll on the cylinder jacket of the body to be formed and shape the flange geometry through their contour.
  • Flaring is understood to mean bending the edge of sheet metal parts to stiffen the workpiece and to defuse the edge.
  • flanging is a preparatory working procedure in which the cylinder jacket of the can body is formed over the entire circumference in the area of the delimiting edges.
  • the shaped flare is determined in particular by the flare radius, which adjoins the starting contour of the can, and a primarily uncurved and mostly largely perpendicular to the cylinder axis oriented end region of the flare.
  • flanging rollers are used which perform a rotational movement and are arranged in a common receptacle on a pitch circle given by the can diameter.
  • the receptacle performs a rotational movement relative to the can body, the axis of rotation corresponding to the longitudinal axis of the can.
  • a coaxial to the longitudinal axis of the can body is used Limiting ring, which surrounds the flanging rollers with its inner jacket. If you place the can body, also known as the can body, on the flanging rollers and continue to feed the can body and the set of flanging rollers towards one another, the can body end is bent outwards until it has a diameter that corresponds to the inner diameter of the limiting ring.
  • the device described in claim 1 which, according to the invention, is characterized by one or more limiting bodies which, at least when the maximum flange diameter is reached, are / are arranged between adjacent flange rolls and with his / her, the common longitudinal axis of the device and the cylindrical body-facing outer surface projects beyond the cylindrical envelope surface formed by the rolling movement of the parts of the flange rollers that form the flange geometry inward about the longitudinal axis mentioned.
  • An essential core idea of the present invention is to provide a jacket-side boundary of the flange which does not correspond to the previous boundary ring.
  • the limiting body according to the invention can be formed in one piece as a sleeve body with recesses or windows for the parts of the flanging rollers that form the flanging geometry.
  • its inner circumferential surface can also have a wave shape which is formed parallel to the common longitudinal axis in order to reach with parts between flanging rollers lying next to one another.
  • the boundary body surface will be designed so that the flange running there is guided with low friction.
  • individual limiting bodies can also be arranged between the flanging rollers, the smallest common inner shell diameter of which projects inward beyond the cylindrical envelope curve formed by the parts of the flanging rollers that form the flanging geometry.
  • the delimiting bodies are also only required as an abutment against the flare at which the flanging bend is formed, which is why it is possible in principle to move the delimiting bodies in question in a star-controlled manner at this time in order to limit the maximum flanging diameter all around.
  • the limiting body be designed to be stationary or capable of rotation.
  • the formation of bodies capable of rotation, in particular individual limiting bodies, has the advantage that entraining movements of the limiting bodies can be controlled, which minimize the friction of the flange on the limiting bodies.
  • the limiting bodies are preferably cylindrical, so that they each guide the flange essentially tangentially.
  • At least one limiting body is provided between each pair of flanging rollers lying next to one another and is set “on a gap”.
  • each limiting body is designed as a rotatably mounted roller, which may be equipped with its own drive, the advantage of the lower rolling friction can be used.
  • the slippage between the flanging and limiting rollers when the can bodies are run in can be eliminated and This means that gentle forming can also be carried out for very thin and sensitive materials.
  • the flanging rollers and limiting rollers are preferably mounted in a common receptacle which can be rotated about a central axis coinciding with the can axis.
  • the limiting rollers are arranged so as to be displaceable in the sense of changing the distance of their axes of rotation from the central longitudinal or rotational axis of the receptacle, preferably in guide pieces or by means of an eccentric bearing.
  • crimping rollers In order to be able to additionally crimp cans of different diameters, it is provided to additionally arrange the crimping rollers so as to be displaceable in the sense of changing the distance of their axis of rotation from the central longitudinal axis.
  • the active surfaces of the limiting rollers are preferably shaped in such a way that, in addition to the limitation of the flange dimensions, an additional flange deformation can be effected by them. Both the flanging rollers and the delimiting body then serve for flanging deformation.
  • the device according to the invention for roller flanging cylindrical bodies essentially consists of several - here eight - flanging rollers 10, the longitudinal or rotational axes 11 of which are arranged on a common pitch circle 12.
  • the flanging rollers 10 each perform a rotational movement (see arrow 13) and roll off along the can body 14 or along the flanging B that is created.
  • the can body 14 is moved onto the rollers 10, for example by lowering.
  • the flanging rollers 10 have a lower cylindrical part 15 with a larger diameter, through the shoulder or collar 16 of which the flanging B is formed on the can body 14.
  • the flanging rollers 10 are conical at their end facing the can body, the part 15 being followed by a steeply conical part 10 'and then a flat-conical tip 10' '.
  • limiting rollers 17 are provided between the flanging rollers 10, each set to a gap, the longitudinal or rotational axes 18 of which are arranged on a common pitch circle 19.
  • the limiting rollers 17 are radially displaceable, which can be done translationally by guide pieces 20 or by an eccentric bearing.
  • the limiting rollers 17 are - at least at the time of Contact with the flare B to be produced - so that they lie on a respective bisector between the flare rollers.
  • the flanging rollers 10 and the limiting rollers 17 are mounted in a common receptacle 22 which rotates about a central longitudinal axis 23 coinciding with the can axis.
  • the largest diameter resulting from the flanging process can be set by the position of the limiting rollers 17, namely the determination of the radius of the pitch circle 19 on which the axes of rotation 18 of which are located.
  • the geometric configuration of the flare B i.e. H. the flare width can be influenced.
  • the diameter of the cylindrical enveloping surface 24, which is enclosed by the boundary rollers 17 and corresponds to an incircle, corresponding to the outer diameter of the finished flanging edge B, is in any case smaller than the diameter of the enveloping curve 25 around the lower parts 15 of the flanging rollers 10.
  • the limiting rollers 17 are also driven (see arrow 21), so that there is no relative speed between the flanging rollers 10 on the one hand and the limiting rollers 17 on the other hand to the can body 14.
  • the directions of rotation of the flanging rollers 10 and the limiting rollers 17 are opposite in this case.
  • the flanging rollers 10 In order to be able to use the flanging device to a limited extent for other can diameters, it is provided to arrange the flanging rollers 10 in the receptacle 22 so as to be displaceable and adjustable in the manner described for the limiting rollers 17 in the sense of a change in the diameter of the pitch circle.

Abstract

The invention relates to a device for flanging cylindrical bodies (14) by rolling, having a plurality of flanging rollers (10) which are rotatably mounted in a holder (22), roll on the cylindrical shell to be formed of the body (14) and form the flange geometry by virtue of their shape. In order to avoid penetration of burr or material of the body (14) between a boundary ring and the flanging rollers (10) and to ensure that the flanging diameter is uniform, the proposal is to provide at least one boundary element (17), which projects inwards beyond the cylindrical envelope surface (25) around the longitudinal axis (23) of the device, said envelope surface (25) being formed by those parts (15) of the flanging rollers (10) which shape the flange geometry. <IMAGE>

Description

Die Erfindung betrifft eine Vorrichtung zum Rollbördeln zumindest im Randbereich zylindrischer Körper, mit mehreren Bördelrollen, die in einer Aufnahme drehbar gelagert sind und am umzuformenden Zylindermantel des Körpers abwälzen und durch ihre Kontur die Bördelgeometrie formen.The invention relates to a device for roller flanging at least in the edge region of cylindrical bodies, with a plurality of flanging rollers, which are rotatably mounted in a receptacle and roll on the cylinder jacket of the body to be formed and shape the flange geometry through their contour.

Unter Bördeln wird das Umbiegen der Kante von Blechteilen zur Werkstückversteifung und zur Entschärfung des Randes verstanden. Bei anzufalzenden Dosenrumpfenden stellt das Bördeln ein vorbereitendes Arbeitsverfahren dar, bei dem der Zylindermantel des Dosenrumpfes im Bereich der begrenzenden Kanten über den gesamten Umfang umgeformt wird. Der geformte Bördel wird insbesondere durch den Bördelradius, der sich an die Ausgangskontur der Dose anschließt, und einen vornehmlich ungekrümmten und meist weitgehend senkrecht zur Zylinderachse ausgerichteten Endbereich des Bördels betimmt. Zur Ausbildung des Bördels dienen Bördelrollen, die eine Rotationsbewegung ausführen und in einer gemeinsamen Aufnahme auf einem durch den Dosendurchmesser gegebenen Teilkreis angeordnet sind. Die Aufnahme führt relativ zum Dosenrumpf eine Rotationsbewegung aus, wobei die Drehachse der Längsachse der Dose entspricht. Zur Begrenzung des maximalen Bördeldurchmessers bzw. -umfangs dient ein koaxial zur Dosenrumpflängsachse gelagerter Begrenzungsring, der mit seinem Innenmantel die Bördelrollen umschließt. Setzt man den auch als Dosenzarge bezeichneten Dosenrumpf auf die Bördelrollen auf und führt den Dosenrumpf und den Satz Bördelrollen weiter aufeinander zu, so wird das Dosenrumpfende nach außen aufgebogen, bis es einen Durchmesser hat, der dem Innendurchmesser des Begrenzungsrings entspricht. Zwischen dem Begrenzungsring und den Bördelrollen liegt ein Spalt, in den das gebördelte Material bzw. Schnittgrat des behandelten Werkstücks eindringen kann. Dabei können Beschichtungen der Bördelvorrichtungsteile beschädigt werden. Ferner droht eine unkontrollierte Mitnahme des Dosenrumpfes durch die Bördelrollen mit der Folge von Deformationen und starker Ungleichmäßigkeit des Bördels.Flaring is understood to mean bending the edge of sheet metal parts to stiffen the workpiece and to defuse the edge. For can body ends to be seamed, flanging is a preparatory working procedure in which the cylinder jacket of the can body is formed over the entire circumference in the area of the delimiting edges. The shaped flare is determined in particular by the flare radius, which adjoins the starting contour of the can, and a primarily uncurved and mostly largely perpendicular to the cylinder axis oriented end region of the flare. To form the flaring, flanging rollers are used which perform a rotational movement and are arranged in a common receptacle on a pitch circle given by the can diameter. The receptacle performs a rotational movement relative to the can body, the axis of rotation corresponding to the longitudinal axis of the can. To limit the maximum flange diameter or circumference, a coaxial to the longitudinal axis of the can body is used Limiting ring, which surrounds the flanging rollers with its inner jacket. If you place the can body, also known as the can body, on the flanging rollers and continue to feed the can body and the set of flanging rollers towards one another, the can body end is bent outwards until it has a diameter that corresponds to the inner diameter of the limiting ring. There is a gap between the limiting ring and the flanging rollers, into which the flanged material or cutting burr of the treated workpiece can penetrate. Coatings on the parts of the flaring device can be damaged. Furthermore, an uncontrolled entrainment of the can body by the flanging rollers threatens with the result of deformations and strong unevenness of the flanging.

Es ist Aufgabe der vorliegenden Erfindung, die eingangs genannte Vorrichtung derart weiterzuentwickeln, daß ein Eindringen von Schnittgrat oder der Dosenzarge bzw. des Dosenrumpfes zwischen dem Begrenzungsring und den Bördelrollen vermieden wird und sichergestellt ist, daß der Bördeldurchmesser gleichmäßig über den Dosenumfang herstellbar ist.It is an object of the present invention to further develop the aforementioned device in such a way that penetration of the burr or the can body or the can body between the limiting ring and the flanging rollers is avoided and it is ensured that the flanging diameter can be produced uniformly over the circumference of the can.

Diese Aufgabe wird durch die im Anspruch 1 beschriebene Vorrichtung gelöst, die erfindungsgemäß durch einen oder mehrere Begrenzungskörper gekennzeichnet ist, der oder die zumindest bei Erreichen des maximalen Bördeldurchmessers zwischen nebeneinanderliegenden Bördelrollen angeordnet ist/sind und mit seiner/ihrer, der gemeinsamen Längsachse der Vorrichtung und der zylindrischen Körper zugewandten Mantelfläche die zylindrische, durch die Abrollbewegung der die Bördelgeometrie formenden Teile der Bördelrollen gebildete Hüllfläche um die genannte Längsachse nach innen überragt/überragen.This object is achieved by the device described in claim 1, which, according to the invention, is characterized by one or more limiting bodies which, at least when the maximum flange diameter is reached, are / are arranged between adjacent flange rolls and with his / her, the common longitudinal axis of the device and the cylindrical body-facing outer surface projects beyond the cylindrical envelope surface formed by the rolling movement of the parts of the flange rollers that form the flange geometry inward about the longitudinal axis mentioned.

Wesentlicher Kerngedanke der vorliegenden Erfindung ist es, eine mantelseitige Begrenzung des Bördels vorzusehen, die nicht dem bisherigen Begrenzungsring entspricht.An essential core idea of the present invention is to provide a jacket-side boundary of the flange which does not correspond to the previous boundary ring.

Der erfindungsgemäße Begrenzungskörper kann einstückig als Hülsenkörper mit Ausnehmungen oder Fenstern für die die Bördelgeometrie formenden Teile der Bördelrollen ausgebildet sein. Seine Innenmantelfläche kann aber auch eine parallel zur gemeinsamen Längsachse ausgebildete Wellenform besitzen, um mit Teilen zwischen nebeneinanderliegenden Bördelrollen zu reichen. Die Begrenzungskörperfläche wird hierbei so gestaltet sein, daß der dort ablaufende Bördel reibungsarm geführt wird. Alternativ hierzu können zwischen den Bördelrollen auch einzelne Begrenzungskörper angeordnet sein, deren kleinster gemeinsamer Innenmanteldurchmesser die zylindrische, durch die die Bördelgeometrie formenden Teile der Bördelrollen gebildete Hüllkurve nach innen überragt. Hierdurch wird verhindert, daß der Bördelaußenrand die Bördelrollen überragt, so daß unkontrollierte Bördelbewegungen vermieden werden. Die Begrenzungskörper sind auch erst zu dem Zeitpunkt als Anlage an den Bördel erforderlich, zu dem die Bördelumbiegung geformt wird, weshalb es prinzipiell möglich ist, betreffende Begrenzungskörper taktgesteuert sternförmig zu diesem Zeitpunkt aufeinanderzu zu bewegen, um ringsum den maximalen Bördeldurchmesser zu begrenzen.The limiting body according to the invention can be formed in one piece as a sleeve body with recesses or windows for the parts of the flanging rollers that form the flanging geometry. However, its inner circumferential surface can also have a wave shape which is formed parallel to the common longitudinal axis in order to reach with parts between flanging rollers lying next to one another. The boundary body surface will be designed so that the flange running there is guided with low friction. As an alternative to this, individual limiting bodies can also be arranged between the flanging rollers, the smallest common inner shell diameter of which projects inward beyond the cylindrical envelope curve formed by the parts of the flanging rollers that form the flanging geometry. This prevents the flanging outer edge from protruding beyond the flanging rollers, so that uncontrolled flanging movements are avoided. The delimiting bodies are also only required as an abutment against the flare at which the flanging bend is formed, which is why it is possible in principle to move the delimiting bodies in question in a star-controlled manner at this time in order to limit the maximum flanging diameter all around.

Weiterbildungen der Erfindung sind in den Unteransprüchen 2 bis 11 beschrieben.Further developments of the invention are described in subclaims 2 to 11.

So kann der Begrenzungskörper - wie bereits erwähnt - feststehend oder rotationsfähig ausgebildet sein. Die Ausbildung zu rotationsfähigen Körpern, insbesondere einzelnen Begrenzungskörpern hat den Vorteil, daß Mitführbewegungen der Begrenzungskörper steuerbar sind, die die Reibung des Bördels an den Begrenzungskörpern minimieren.As already mentioned, the limiting body be designed to be stationary or capable of rotation. The formation of bodies capable of rotation, in particular individual limiting bodies, has the advantage that entraining movements of the limiting bodies can be controlled, which minimize the friction of the flange on the limiting bodies.

Vorzugsweise sind die Begrenzungskörper zylinderförmig, so daß sie jeweils den Bördel im wesentlichen tangential begrenzend führen.The limiting bodies are preferably cylindrical, so that they each guide the flange essentially tangentially.

Nach einer weiteren Ausgestaltung der Erfindung ist zwischen jedem Paar nebeneinanderliegender Bördelrollen mindestens ein Begrenzungskörper vorgesehen, der "auf Lücke" gesetzt ist.According to a further embodiment of the invention, at least one limiting body is provided between each pair of flanging rollers lying next to one another and is set “on a gap”.

Wird der oder jeder Begrenzungskörper als drehbar gelagerte Rolle ausgestaltet, die ggf. mit einem eigenen Antrieb ausgestattet ist, kann der Vorteil der geringeren Rollreibung genutzt werden. Insbesondere für motorangetriebene Rollen und im Hinblick auf die konstruktive Anordnung empfiehlt es sich, die Achsen der Begrenzungsrollen auf einen Kreis bzw. einen Zylindermantel zu legen.If the or each limiting body is designed as a rotatably mounted roller, which may be equipped with its own drive, the advantage of the lower rolling friction can be used. In particular for motor-driven rollers and with regard to the structural arrangement, it is advisable to lay the axes of the limiting rollers on a circle or a cylinder jacket.

Durch einen Eigenantrieb der Begrenzungsrollen mit einer Bewegungsrichtung, die der der Bördelrollen entgegengerichtet ist, und mit einer Geschwindigkeit, die der der äußersten Kante des Bördels in der Phase des gegenseitigen Kontaktes entspricht, kann der Schlupf zwischen Bördel und Begrenzungsrollen beim Einlaufen der Dosenrümpfe eliminiert werden und somit auch für sehr dünne und empfindliche Materialien eine schondende Umformung realisiert werden.By self-driving the limiting rollers with a direction of movement that is opposite to that of the flanging rollers and at a speed that corresponds to that of the outermost edge of the flanging in the phase of mutual contact, the slippage between the flanging and limiting rollers when the can bodies are run in can be eliminated and This means that gentle forming can also be carried out for very thin and sensitive materials.

Stellt man die Wirkflächen der Begrenzungskörper, vorzugsweise Begrenzungsrollen, rechtwinklig zur Neigung des Bördels, kann eine Veränderung der Höhenlage des Bördels zwischen den Bördelrollen und eine daraus induzierte Ungleichmäßigkeit in der Bördelausbildung verhindert werden.If you set the active surfaces of the boundary bodies, preferably limiting rollers, at right angles to the inclination of the flange, a change in the height of the flange between the flange rollers and a consequent unevenness in the flange formation can be prevented.

Die Bördelrollen und Begrenzungsrollen sind vorzugsweise in einer gemeinsamen Aufnahme gelagert, die um eine mit der Dosenachse zusammenfallende zentrale Achse rotierbar sind.The flanging rollers and limiting rollers are preferably mounted in a common receptacle which can be rotated about a central axis coinciding with the can axis.

Um die Breite des Bördels beeinflussen zu können, sind die Begrenzungsrollen im Sinne einer Veränderung des Abstandes ihrer Drehachsen von der zentralen Längs- oder Rotationsachse der Aufnahme verschiebbar angeordnet, vorzugsweise in Führungsstücken oder durch eine exzentrische Lagerung.In order to be able to influence the width of the flange, the limiting rollers are arranged so as to be displaceable in the sense of changing the distance of their axes of rotation from the central longitudinal or rotational axis of the receptacle, preferably in guide pieces or by means of an eccentric bearing.

Um zusätzlich Dosen unterschiedlicher Durchmesser bördeln zu können, ist vorgesehen, zusätzlich die Bördelrollen im Sinne einer Veränderung des Abstandes ihrer Drehachse von der zentralen Längsachse verschiebbar anzuordnen.In order to be able to additionally crimp cans of different diameters, it is provided to additionally arrange the crimping rollers so as to be displaceable in the sense of changing the distance of their axis of rotation from the central longitudinal axis.

Schließlich sind vorzugsweise die Wirkflächen der Begrenzungsrollen in der Weise ausgeformt, daß neben der Begrenzung der Bördelabmessungen durch sie eine zusätzliche Bördelumformung bewirkbar ist. Sowohl die Bördelrollen als auch die Begrenzungskörper dienen dann der Bördelumformung.Finally, the active surfaces of the limiting rollers are preferably shaped in such a way that, in addition to the limitation of the flange dimensions, an additional flange deformation can be effected by them. Both the flanging rollers and the delimiting body then serve for flanging deformation.

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und wird im folgenden näher beschrieben. Es zeigen

Fig. 1
eine Bördelvorrichtung für den unteren Rand eines Dosenrumpfes in einem Vertikalschnitt längs der Linie I-I in Fig. 2,
Fig. 2
die Bördelvorrichtung in einer teilweise geschnittenen Draufsicht und
Fig. 3
eine abgewandelte Ausführungsform der Bördelvorrichtung in einer auszugsweisen Draufsicht.
An embodiment of the invention is shown in the drawing and will be described in more detail below. Show it
Fig. 1
a crimping device for the lower edge of a can body in one Vertical section along the line II in Fig. 2,
Fig. 2
the crimping device in a partially sectioned plan view and
Fig. 3
a modified embodiment of the flanging device in a partial plan view.

Die erfindungsgemäße Vorrichtung zum Rollbördeln zylindrischer Körper besteht im wesentlichen aus mehreren - hier acht - Bördelrollen 10, deren Längs- oder Drehachsen 11 auf einem gemeinsamen Teilkreis 12 angeordnet sind. Die Bördelrollen 10 führen jeweils eine Rotationsbewegung aus (siehe Pfeil 13) und wälzen entlang des Dosenrumpfes 14 bzw. entlang des entstehenden Bördels B ab. Zum Bördeln wird der Dosenrumpf 14 auf die Rollen 10, beispielsweise durch Absenken, zugefahren. Die Bördelrollen 10 besitzen einen unteren zylindrischen Teil 15 mit größerem Durchmesser, durch dessen Schulter oder Kragen 16 der Bördel B an dem Dosenrumpf 14 geformt wird. Die Bördelrollen 10 sind an ihrem dem Dosenrumpf zugewandten Ende konisch ausgebildet, wobei sich an den Teil 15 zunächst ein steilkonischer Teil 10' und dann eine flachkonische Spitze 10'' anschließen.The device according to the invention for roller flanging cylindrical bodies essentially consists of several - here eight - flanging rollers 10, the longitudinal or rotational axes 11 of which are arranged on a common pitch circle 12. The flanging rollers 10 each perform a rotational movement (see arrow 13) and roll off along the can body 14 or along the flanging B that is created. For flanging, the can body 14 is moved onto the rollers 10, for example by lowering. The flanging rollers 10 have a lower cylindrical part 15 with a larger diameter, through the shoulder or collar 16 of which the flanging B is formed on the can body 14. The flanging rollers 10 are conical at their end facing the can body, the part 15 being followed by a steeply conical part 10 'and then a flat-conical tip 10' '.

Erfindungsgemäß sind zwischen den Bördelrollen 10 - jeweils auf Lücke gesetzt - Begrenzungsrollen 17 vorgesehen, deren Längs- bzw. Drehachsen 18 auf einem gemeinsamen Teilkreis 19 angeordnet sind. Die Begrenzungsrollen 17 sind radial verschiebbar, was translatorisch durch Führungsstücke 20 oder durch eine exzentrische Lagerung erfolgen kann. Die Begrenzungsrollen 17 sind - zumindest zum Zeitpunkt des Kontaktes mit dem herzustellenden Bördel B - so geführt, daß sie auf einer jeweiligen Winkelhalbierenden zwischen den Bördelrollen liegen.According to the invention, limiting rollers 17 are provided between the flanging rollers 10, each set to a gap, the longitudinal or rotational axes 18 of which are arranged on a common pitch circle 19. The limiting rollers 17 are radially displaceable, which can be done translationally by guide pieces 20 or by an eccentric bearing. The limiting rollers 17 are - at least at the time of Contact with the flare B to be produced - so that they lie on a respective bisector between the flare rollers.

Die Bördelrollen 10 sowie die Begrenzungsrollen 17 sind in einer gemeinsamen Aufnahme 22 gelagert, die um eine zentrische, mit der Dosenachse zusammenfallenden Längsachse 23 rotiert. Der sich aus dem Bördelvorgang ergebende größte Durchmesser kann durch die Stellung der Begrenzungsrollen 17, nämlich die Bestimmung des Radius des Teilkreises 19, auf dem sich deren Drehachsen 18 befinden, eingestellt werden. Bei vorgegebener, fester Anordnung der Bördelrollen 10 in der Aufnahme 22 kann so durch Verändern des Durchmessers des Teilkreises 19 die geometrische Ausbildung des Bördels B, d. h. die Bördelbreite beeinflußt werden. Dabei ist der dem Außendurchmessser des fertigen Bördelrandes B entsprechende Durchmesser der von den Begrenzungsrollen 17 eingeschlossenen, einem Inkreis entsprechenden zylindrischen Hüllfläche 24 in jedem Fall kleiner als der Durchmesser der um die unteren Teile 15 der Bördelrollen 10 gedachten Hüllkurve 25.The flanging rollers 10 and the limiting rollers 17 are mounted in a common receptacle 22 which rotates about a central longitudinal axis 23 coinciding with the can axis. The largest diameter resulting from the flanging process can be set by the position of the limiting rollers 17, namely the determination of the radius of the pitch circle 19 on which the axes of rotation 18 of which are located. For a given, fixed arrangement of the flanging rollers 10 in the receptacle 22, the geometric configuration of the flare B, i.e. H. the flare width can be influenced. In this case, the diameter of the cylindrical enveloping surface 24, which is enclosed by the boundary rollers 17 and corresponds to an incircle, corresponding to the outer diameter of the finished flanging edge B, is in any case smaller than the diameter of the enveloping curve 25 around the lower parts 15 of the flanging rollers 10.

Zur Vermeidung von Beschädigungen des Dosenrumpfes 14 sind die Begrenzungsrollen 17 ebenfalls angetrieben (siehe Pfeil 21), so daß zwischen den Bördelrollen 10 einerseits und den Begrenzungsrollen 17 andererseits zum Dosenrumpf 14 jeweils keine Relativgeschwindigkeit besteht. Die Drehrichtungen der Bördelrollen 10 und der Begrenzungsrollen 17 sind hierbei entgegengesetzt.To avoid damage to the can body 14, the limiting rollers 17 are also driven (see arrow 21), so that there is no relative speed between the flanging rollers 10 on the one hand and the limiting rollers 17 on the other hand to the can body 14. The directions of rotation of the flanging rollers 10 and the limiting rollers 17 are opposite in this case.

In der Zeichnung ist lediglich der Teil einer Bördelvorrichtung für den unteren Rand eines Dosenrumpfes dargestellt und beschrieben. Eine Vorrichtung zum gleichzeitigen Bördeln beider Ränder eines Dosenrumpfes weist die beschriebene und in den Fig. 1 und 2 dargestellte Vorrichtung noch einmal spiegelbildlich darüber auf: Die Bördelrollen (10) des oberen Vorrichtungsteils befinden sich dann unter der Halterung (22), wobei der Rollenteil (15) mit größerem Durchmesser oben ist und die konische Spitze nach unten weist. Damit sich der Dosenrumpf 14 bei freiem Spiel der Kräfte während des Bördelns auch ohne zusätzliche Einspannung nicht dreht, ist der Drehsinn gleicher Teile der oberen und der unteren Bördelvorrichtung - in Richtung der zentralen Längsachse 23 gesehen - jeweils entgegengesetzt.In the drawing, only the part of a flanging device for the lower edge of a can body is shown and described. A device for flanging both edges at the same time 1 and 2, the device described and shown in FIGS. 1 and 2 again has a mirror image above it: the flanging rollers (10) of the upper part of the device are then located under the holder (22), the roller part (15) having a larger diameter being at the top and the conical tip faces down. So that the can body 14 does not rotate even with no additional clamping during free play of the forces during the flanging, the direction of rotation of the same parts of the upper and the lower flanging device - as seen in the direction of the central longitudinal axis 23 - is opposite in each case.

Um die Bördelvorrichtung in begrenztem Umfang auch für andere Dosendurchmesser verwenden zu können, ist vorgesehen, auf die Bördelrollen 10 in der für die Begrenzungsrollen 17 beschriebenen Weise im Sinne einer Veränderung des Durchmessers des Teilkreises 12 in der Aufnahme 22 verschieb- und einstellbar anzuordnen.In order to be able to use the flanging device to a limited extent for other can diameters, it is provided to arrange the flanging rollers 10 in the receptacle 22 so as to be displaceable and adjustable in the manner described for the limiting rollers 17 in the sense of a change in the diameter of the pitch circle.

Im Abwandlung der beschriebenen Ausführungsform gemäß den Fig. 1 und 2 sind bei dem in Fig. 3 angedeuteten Bördelwerkzeug zwischen jeweils zwei Bördelrollen 10 zwei Begrenzungsrollen 17a, 17b kleineren Durchmessers angeordnet.In the modification of the described embodiment according to FIGS. 1 and 2, in the case of the flanging tool indicated in FIG. 3, two limiting rollers 17a, 17b of smaller diameter are arranged between each two flanging rollers 10.

Claims (12)

Vorrichtung zum Rollbördeln zumindest im Randbereich zylindrischer Körper (14), mit mehreren Bördelrollen (10), die in einer Aufnahme (22) drehbar gelagert sind und am umzuformenden Zylindermantel des Körpers (14) abwälzen und durch ihre Kontur (Kragen 16) die Bördelgeometrie formen,
gekennzeichnet durch
einen oder mehrere Begrenzungskörper (17) der oder die zumindest bei Erreichen des maximalen Bördeldurchmessers zwischen nebeneinanderliegenden Bördelrollen (10) angeordnet ist/ sind und mit seiner/ihrer, der gemeinsamen Längsachse (23) der Vorrichtung und der zylindrischen Körper (14) zugewandten Mantelfläche die zylindrische, durch die die Bördelgeometrie formenden Teile (15) der Bördelrollen (10) gebildete Hüllfläche (25) um die genannte Längsachse (23) nach innen überragt/überragen.Device for roll flanging at least in the edge region of cylindrical bodies (14), with a plurality of flanging rollers (10) which are rotatably mounted in a receptacle (22) and roll on the cylinder jacket of the body (14) to be formed and which shape the flange geometry by means of its contour (collar 16) ,
marked by
one or more delimiting bodies (17) which, at least when the maximum flanging diameter is reached, are / are arranged between flanging rollers (10) lying next to one another and with its lateral surface facing the common longitudinal axis (23) of the device and the cylindrical body (14) Cylindrical envelope surface (25) formed by the parts (15) of the flanging rollers (10) that form the flanging geometry projects inwards over the longitudinal axis (23). Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Begrenzungskörper (17) feststehend oder rotationsfähig ausgebildet sind.Device according to claim 1, characterized in that the limiting bodies (17) are designed to be stationary or capable of rotation. Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Begrenzungskörper (17) zylinderförmig sind.Device according to claim 1 or 2, characterized in that the limiting bodies (17) are cylindrical. Vorrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß zwischen jedem Paar nebeneinanderliegender Bördelrollen (10) mindestens ein Begrenzungskörper (17) vorgesehen ist.Device according to one of claims 1 to 3, characterized in that at least one limiting body (17) is provided between each pair of flanging rollers (10) lying next to one another. Vorrichtung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die Begrenzungskörper (17) drehbar gelagerte Rollen sind.Device according to one of claims 1 to 4, characterized in that the limiting bodies (17) are rotatably mounted rollers. Vorrichtung nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß die Längsachsen (18) der Begrenzungsrollen (17) auf einem Kreis (19) liegen.Device according to one of claims 1 to 5, characterized in that the longitudinal axes (18) of the limiting rollers (17) lie on a circle (19). Vorrichtung nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß die Begrenzungsrollen (17) im Sinne einer Veränderung des Abstandes ihrer Längsachsen (18) von der zentralen Längsachse (23) der Vorrichtung verschiebbar angeordnet sind, vorzugsweise in Führungsstücken (20) oder durch eine exzentrische Lagerung.Device according to one of claims 1 to 6, characterized in that the limiting rollers (17) are arranged so as to be displaceable in the sense of changing the distance of their longitudinal axes (18) from the central longitudinal axis (23) of the device, preferably in guide pieces (20) or through an eccentric bearing. Vorrichtung nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß die Rollen (10, 17) antreibbar sind, vorzugsweise derart, daß die Relativgeschwindigkeit zwischen der Wirkfläche der Begrenzungsrollen (17) und der Kante des Bördels (B) zur Vermeidung von Beschädigungen Null ist.Device according to one of claims 1 to 7, characterized in that the rollers (10, 17) can be driven, preferably in such a way that the relative speed between the active surface of the limiting rollers (17) and the edge of the flange (B) is zero in order to avoid damage is. Vorrichtung nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß die Begrenzungskörper, vorzugsweise die Begrenzungsrollen (17) derart angeordnet sind, daß deren Wirkflächen rechtwinklig zur Neigung des Bördels (B) stehen.Device according to one of claims 1 to 8, characterized in that the delimiting bodies, preferably the delimiting rollers (17), are arranged in such a way that their active surfaces are at right angles to the inclination of the flange (B). Vorrichtung nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, daß die Bördelrollen (10) und die Begrenzungsrollen (17) in einer gemeinsamen Aufnahme (22) gelagert sind, die um eine mit der Dosenachse zusammenfallende zentrale Achse (23) rotierbar ausgebildet ist.Device according to one of claims 1 to 9, characterized in that the flanging rollers (10) and the limiting rollers (17) are mounted in a common receptacle (22) which is designed to be rotatable about a central axis (23) coinciding with the can axis. Vorrichtung nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, daß die Bördelrollen (10) im Sinne einer Veränderung des Abstandes ihrer Drehachsen (11) von der zentralen Längsachse (23) verschiebbar angeordnet sind, vorzugsweise in Führungsstücken (20) oder durch eine exzentrische Lagerung.Device according to one of claims 1 to 10, characterized in that the flanging rollers (10) in In order to change the distance between their axes of rotation (11) from the central longitudinal axis (23), preferably in guide pieces (20) or by an eccentric bearing. Vorrichtung nach einem der Ansprüche 1 bis 11, dadurch gekennzeichnet, daß die Begrenzungskörper (17) so ausgeformt sind, daß durch sie eine zusätzliche Bördelumformung bewirkbar ist.Device according to one of claims 1 to 11, characterized in that the limiting bodies (17) are shaped in such a way that they can be used to effect additional flanging.
EP94106168A 1993-05-07 1994-04-21 Device for flanging cylindrical bodies by rolling Expired - Lifetime EP0623405B1 (en)

Applications Claiming Priority (2)

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DE4315214 1993-05-07
DE4315214A DE4315214A1 (en) 1993-05-07 1993-05-07 Device for rolling flanging cylindrical bodies

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EP0623405A1 true EP0623405A1 (en) 1994-11-09
EP0623405B1 EP0623405B1 (en) 1998-12-23

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EP (1) EP0623405B1 (en)
CN (1) CN1056105C (en)
DE (2) DE4315214A1 (en)
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TW (1) TW276198B (en)

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DE59407511D1 (en) 1999-02-04
ES2125366T3 (en) 1999-03-01
US5477720A (en) 1995-12-26
CN1056105C (en) 2000-09-06
CN1100012A (en) 1995-03-15
TW276198B (en) 1996-05-21
EP0623405B1 (en) 1998-12-23
DE4315214A1 (en) 1994-11-10

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