EP0491212B1 - Roll-forming machine with at least one holder for a forming roller - Google Patents

Roll-forming machine with at least one holder for a forming roller Download PDF

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Publication number
EP0491212B1
EP0491212B1 EP91120670A EP91120670A EP0491212B1 EP 0491212 B1 EP0491212 B1 EP 0491212B1 EP 91120670 A EP91120670 A EP 91120670A EP 91120670 A EP91120670 A EP 91120670A EP 0491212 B1 EP0491212 B1 EP 0491212B1
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EP
European Patent Office
Prior art keywords
roller
holder
pressure medium
spinning machine
metal spinning
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Expired - Lifetime
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EP91120670A
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German (de)
French (fr)
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EP0491212A1 (en
Inventor
Helmut Dipl.-Ing. Wenzel
Karl-Heinz Köstermeier
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Leifeld GmbH and Co
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Leifeld GmbH and Co
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Application filed by Leifeld GmbH and Co filed Critical Leifeld GmbH and Co
Priority to AT91120670T priority Critical patent/ATE103213T1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/14—Spinning
    • B21D22/16—Spinning over shaping mandrels or formers

Definitions

  • the invention relates to a spinning machine according to the preamble of claim 1.
  • Pressing machines and associated roll holders are known and have long been used for the cold forming of rotationally symmetrical workpieces.
  • the roll holder is used in particular to quickly convert the spinning machine from one spinning roller to another spinning roller.
  • several roll holders are usually arranged in a magazine and can optionally be connected to the support arrangement, the selection and connection and separation of the roll holder as well as the pressing process itself being carried out automatically under the control of a control program.
  • a common method for the generation of control data for the control program is the so-called playback method, in which the spinning machine is first manually operated by an operator and at the same time the respective operating steps and the spinning roller positions thus generated are recorded electronically and recorded as data. On the basis of this recorded data, the same workflow is then repeated as often as desired exactly and with increased working speed under the control of the control program, the pressure roller gradually moving to the stored positions.
  • EP 0 125 720 B1 discloses a spinning machine provided with a corresponding force limiting device.
  • the roll holder is rigid, but a spring unit is arranged between the upper support of the support arrangement and the drive device for the upper support.
  • the force exerted by the pressure roller on the roller holder and on the top support on its drive device is detected by means of a sensor on the basis of the degree of compression of the spring unit, the force essentially corresponding to the force exerted by the pressure roller on the workpiece.
  • the measured force values are fed to a control unit and, under the control of the control program, the carriage carrying the roll holder is withdrawn by means of its drive unit in accordance with the measured values when a predeterminable degree of compression of the spring unit is exceeded. or when the pressure drops below a predefinable degree of compression.
  • the force that can be exerted on the workpiece by the spinning roller can be limited to harmless values in a simple manner by setting a corresponding pressure of the pressure medium. Furthermore, by using the piston-cylinder arrangement, the force acting on the piston can be kept practically constant over the entire stroke, ie a largely linear characteristic is achieved. Since the moving masses are very small, a very high speed of reaction is ensured, which allows a high working speed. In addition, no control loop is required here, which excludes swinging or rocking and what makes sensors and other additional control and regulating devices superfluous.
  • the invention is also suitable for retrofitting existing spinning machines, because only an exchange of the roll holder is required.
  • a pressure medium source for example for compressed air or hydraulic fluid, is generally present anyway, so that, apart from a pressure control unit that may still be required, this does not involve any great additional outlay.
  • the exemplary embodiment of a roll holder 1 shown here essentially consists of a fixed holder part 2, which can be connected to a support arrangement (not shown here) of a spinning machine, and a holder part 3 that is displaceable relative to the latter 1 right, the fixed holder part 2 is formed with a cylinder 20, which by means of a cylinder base 21 for support arrangement is closed.
  • the cylinder base 21 is detachably connected here with the interposition of a sealing ring 26 'to the remaining part of the fixed holder part 2 and has a central pressure medium connection 22, which has the shape of a stepped bore, for supplying and removing a pressure medium.
  • Above and below this cylinder 20 there are connecting flanges 23 with bores 23 ', by means of which a releasable connection of the roll holder 1 to the support arrangement can take place.
  • the fixed holder part 2 In its averted from the support arrangement, i.e. in the drawing on the left part, the fixed holder part 2 carries a guide body 24 which extends in the longitudinal direction of the roll holder 1.
  • the thrust piece 34 On its inner, i.e. in the right end of FIG. 1, the thrust piece 34 is connected to the end face 31 of a piston 30, which is displaceably guided in the cylinder 20 with a seal by an intermediate sealing ring 26.
  • the thrust piece 34 On its outer, i.e. in the left end of the drawing, the thrust piece 34 carries a pressure roller bearing body 32, on which a pressure roller 10 is rotatably mounted about an axis of rotation 10 '.
  • the connection between the thrust piece 34 and the pressure roller bearing body 32 takes place here by means of a screw 33 running in the direction of the axis of rotation 10 ′, whereby a simple exchange of the pressure roller bearing body 32 with the pressure roller 10 is made possible.
  • the piston 30 When the interior of the cylinder 20 is loaded with the pressure medium through the pressure medium connection 22, the piston 30 is preloaded in the direction of extension with a force dependent on the pressure of the pressure medium.
  • the stroke of the piston 30 and thus also the thrust piece 34 and the pressure roller 10 is limited by a stop 25, which is arranged above the thrust piece 34 and forms part of the fixed holder part 2.
  • a stop cam 35 On the top of the thrust piece 34, a stop cam 35 is attached, which in the basic position of the roller holder 1 shown in FIG. 1 bears against the stop 25.
  • the stop 25 is designed to be adjustable, with a stop support 25 ′ being provided here for this purpose, which runs parallel to the thrust piece 34 and on which the stop 25 can be displaced after loosening a screw and fixed again by tightening the screw.
  • the roll holder 1 is now shown in an operating position in which it is connected to a support arrangement 4, which is only hinted at here, and in which the pressure roller 10 rests on a workpiece 11, which in turn together with a shaping , rotationally symmetrical chuck 12 rotates about a spinning machine spindle axis, not shown here.
  • the spindle axis usually runs at an angle between approximately 20 and 90 ° to the axis of rotation 10 ′ of the spinning roller 10, which in turn is set in rotation by the rotating chuck 12 and workpiece 11.
  • the support arrangement 4 has an integrated pressure medium line 42, which means that when the roll holder 1 is mounted on the support arrangement 4, a connection to a supply device for supplying and discharging the pressure medium is automatically established.
  • the support arrangement 4 which generally comprises a sub-support and an upper support arranged transversely thereto, is moved by means of adjusting devices which can be controlled by the control unit in such a way that the pressure roller 10 performs the desired movement along the workpiece 11 and Feed 12 runs.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Press Drives And Press Lines (AREA)
  • Rolls And Other Rotary Bodies (AREA)
  • Rotary Presses (AREA)

Abstract

The invention relates to a roll-forming machine with at least one holder for a forming roller, the holder being held replaceably against a slide arrangement by a pressure roller rotatably supported by the said holder. The slide arrangement allows displacement of the pressure roller in at least two coordinate directions relative to a workpiece to be deformed by pressing, which can be held on a rotatably drivable spindle of the roll-forming machine by a rotationally symmetrical shaping tool, the roll-forming machine being equipped with a device which limits the force which can be exerted by the forming roller on the workpiece. <??>The new roll-forming machine is characterised in that   - the roll holder (1) is designed with two holder parts (2, 3) which can be displaced relative to one another by sliding, one of which is designed as a fixed holder part (2) which can be connected to the slide arrangement (4) and the other is designed as a displaceable holder part (3) which carries the forming roller (10),   - one holder part (2) is designed with a cylinder (20) which can be supplied with a pressure medium,   - the other holder part (3) is designed with a piston (30) which can be subjected to a predeterminable force in the direction of extension by the pressure medium and   - the forming roller (10) can be dynamically deflected by a force transferred to it from the workpiece (30). <IMAGE>

Description

Die Erfindung betrifft eine Drückmaschine gemäß dem Oberbegriff des Patentanspruches 1.The invention relates to a spinning machine according to the preamble of claim 1.

Drückmaschinen und zugehörige Rollenhalter sind bekannt und werden seit langem für die Kaltverformung von rotationssymmetrischen Werkstücken eingesetzt. Die Rollenhalter dienen insbesondere zu einer schnellen Umrüstung der Drückmaschine von einer Drückrolle auf eine andere Drückrolle. Bei modernen Drückmaschinen sind üblicherweise mehrere Rollenhalter in einem Magazin angeordnet und wahlweise mit der Supportanordnung verbindbar, wobei dann die Auswahl und Verbindung sowie Trennung des Rollenhalters ebenso wie der Drückvorgang selbst unter Kontrolle eines Steuerprogrammes automatisch erfolgen.Pressing machines and associated roll holders are known and have long been used for the cold forming of rotationally symmetrical workpieces. The roll holder is used in particular to quickly convert the spinning machine from one spinning roller to another spinning roller. In modern spinning machines, several roll holders are usually arranged in a magazine and can optionally be connected to the support arrangement, the selection and connection and separation of the roll holder as well as the pressing process itself being carried out automatically under the control of a control program.

Ein verbreitetes Verfahren für die Erzeugung von Steuerdaten für das Steuerprogramm ist das sogenannte Playback-Verfahren, bei welchem zunächst manuell durch eine Bedienungsperson die Drückmaschine geführt wird und gleichzeitig die jeweiligen Bedienungsschritte und die damit erzeugten Drückrollenpositionen elektronisch erfaßt und als Daten aufgezeichnet werden. Anhand dieser aufgezeichneten Daten wird dann unter Kontrolle des Steuerprogrammes der gleiche Arbeitsablauf beliebig oft exakt und mit erhöhter Arbeitsgeschwindigkeit wiederholt, wobei die Drückrolle nach und nach die gespeicherten Positionen abfährt.A common method for the generation of control data for the control program is the so-called playback method, in which the spinning machine is first manually operated by an operator and at the same time the respective operating steps and the spinning roller positions thus generated are recorded electronically and recorded as data. On the basis of this recorded data, the same workflow is then repeated as often as desired exactly and with increased working speed under the control of the control program, the pressure roller gradually moving to the stored positions.

Insbesondere bei Werkstücken aus einem weichen Material, z.B. Aluminium oder Kupfer, kann es bei Schwankungen oder Unregelmäßigkeiten in der Materialstärke der Werkstückrohlinge zu Fehlern bei der Bearbeitung kommen, die im ungünstigsten Fall zu einem Abreißen des Werkstückes infolge einer zu hohen Drückkraft führen. Um dies zu vermeiden, ist eine Begrenzung der von der Drückrolle auf das Werkstück ausgeübten Kraft erforderlich.Especially for workpieces made of a soft material, e.g. Aluminum or copper, fluctuations or irregularities in the material thickness of the workpiece blanks can lead to errors during processing, which in the worst case lead to the workpiece being torn off as a result of excessive pressing force. To avoid this, the force exerted by the spinning roller on the workpiece must be limited.

Aus der EP 0 125 720 B1 ist eine mit einer entsprechenden Kraftbegrenzungseinrichtung versehene Drückmaschine bekannt. Bei dieser Maschine ist der Rollenhalter starr ausgebildet, jedoch ist zwischen dem Obersupport der Supportanordnung und der Antriebseinrichtung für den Obersupport eine Federeinheit angeordnet. Während des Drückvorganges wird über einen Fühler die von der Drückrolle über den Rollenhalter und über den Obersupport auf dessen Antriebseinrichtung ausgeübte Kraft anhand des Zusammendrückungsgrades der Federeinheit erfaßt, wobei die erfaßte Kraft der von der Drückrolle auf das Werkstück ausgeübten Kraft im wesentlichen entspricht. Die erfaßten Kraft-Meßwerte werden einer Steuereinheit zugeführt und unter Kontrolle durch das Steuerprogramm wird nach Maßgabe der erfaßten Meßwerte der den Rollenhalter tragende Schlitten mittels seiner Antriebseinheit bei Überschreiten eines vorgebbaren Zusammendrückungsgrades der Federeinheit zurückgezogen. bzw. bei Unterschreiten eines vorgebbaren Zusammendrückungsgrades vorgeschoben.EP 0 125 720 B1 discloses a spinning machine provided with a corresponding force limiting device. In this machine, the roll holder is rigid, but a spring unit is arranged between the upper support of the support arrangement and the drive device for the upper support. During the pressing process, the force exerted by the pressure roller on the roller holder and on the top support on its drive device is detected by means of a sensor on the basis of the degree of compression of the spring unit, the force essentially corresponding to the force exerted by the pressure roller on the workpiece. The measured force values are fed to a control unit and, under the control of the control program, the carriage carrying the roll holder is withdrawn by means of its drive unit in accordance with the measured values when a predeterminable degree of compression of the spring unit is exceeded. or when the pressure drops below a predefinable degree of compression.

Als nachteilig wird hier angesehen, daß der technische Aufwand sehr hoch ist, denn es wird ein spezieller Obersupport mit Federeinheit und Fühler benötigt und es ist eine Erweiterung des Steuerprogrammes erforderlich. Außerdem besteht hier der Nachteil, daß die zu bewegenden Teile, nämlich der Obersupportschlitten, der Rollenhalter und die Rolle, insgesamt eine große Masse darstellen, was eine relativ geringe Reaktionsgeschwindigkeit zur Folge hat. Da es sich hier außerdem um einen Regelkreis handelt, kann es zu einem Schwingen oder Aufschaukeln in der Positionierung der Drückrolle kommen, was nur durch eine die Reaktionsgeschwindigkeit mindernde Dämpfung vermieden werden kann. Für schnelle Bearbeitungsvorgänge ist diese Maschine deshalb kaum geeignet.It is considered disadvantageous here that the technical effort is very high, because a special upper support with spring unit and sensor is required and an expansion of the control program is necessary. There is also the disadvantage that the parts to be moved, namely the upper support slide, the roll holder and the roll, represent a large mass overall, which is a relatively slow reaction speed has the consequence. Since this is also a control loop, the positioning of the spinning roller can oscillate or rock, which can only be avoided by damping the reaction speed. This machine is therefore hardly suitable for fast machining processes.

Es stellt sich daher die Aufgabe, eine Drückmaschine der eingangs genannten Art zu schaffen, bei welcher mit geringem Aufwand eine wirkungsvolle und reaktionsschnelle Begrenzung der von der Drückrolle auf das Werkstück ausgeübten Kraft ermöglicht wird, ohne daß es zu einem Schwingen oder Aufschaukeln kommen kann.It is therefore the task of creating a spinning machine of the type mentioned, in which an effective and responsive limitation of the force exerted by the spinning roller on the workpiece is made possible with little effort, without causing oscillation or rocking.

Die Lösung dieser Aufgabe gelingt erfindungsgemäß durch eine Drückmaschine der eingangs genannten Art mit den kennzeichnenden Merkmalen des Patentanspruches 1.This object is achieved according to the invention by a spinning machine of the type mentioned at the outset with the characterizing features of patent claim 1.

Mit der Drückmaschine gemäß Erfindung wird erreicht, daß die von der Drückrolle auf das Werkstück ausübbare Kraft in einfacher Weise auf unschädliche Werte begrenzt werden kann, indem ein entsprechender Druck des Druckmediums eingestellt wird. Weiterhin kann durch die Verwendung der Kolben-Zylinder-Anordnung die auf den Kolben wirkende Kraft über den gesamten Hub praktisch konstant gehalten werden, d.h., es wird eine weitgehend lineare Charakteristik erreicht. Da die bewegten Massen sehr klein sind, wird eine sehr hohe Reaktionsschnelligkeit sichergestellt, was eine hohe Arbeitsgeschwindigkeit erlaubt. Außerdem wird hier kein Regelkreis benötigt, was ein Schwingen oder Aufschaukeln ausschließt und was Meßfühler und sonstige zusätzliche Steuer- und Regeleinrichtungen überflüssig macht. Der technische Aufwand bleibt also begrenzt, wozu noch weiter beiträgt, daß allein der Rollenhalter der Drückmaschine modifiziert werden muß, während in allen übrigen Teilen die Drückmaschine sowie das Steuerprogramm völlig unverändert beibehalten werden können. Hierdurch eignet sich die Erfindung auch für die Nachrüstung vorhandener Drückmaschinen, weil lediglich ein Austausch des Rollenhalters erforderlich wird. Eine Druckmediumquelle, z.B. für Druckluft oder Hydraulikflüssigkeit, ist im allgemeinen ohnehin vorhanden, so daß auch hierfür, abgesehen von einer eventuell noch erforderlichen Druckregeleinheit, kein großer zusätzlicher Aufwand entsteht. Mit der neuen Drückmaschine wird daher eine verbesserte Produktqualität erreicht, ohne daß große zusätzliche Kosten für eine entsprechende Ausrüstung der Drückmaschine entstehen und ohne daß zusätzliche Bearbeitungsschritte oder -zeiten benötigt werden.With the spinning machine according to the invention it is achieved that the force that can be exerted on the workpiece by the spinning roller can be limited to harmless values in a simple manner by setting a corresponding pressure of the pressure medium. Furthermore, by using the piston-cylinder arrangement, the force acting on the piston can be kept practically constant over the entire stroke, ie a largely linear characteristic is achieved. Since the moving masses are very small, a very high speed of reaction is ensured, which allows a high working speed. In addition, no control loop is required here, which excludes swinging or rocking and what makes sensors and other additional control and regulating devices superfluous. The technical effort remains limited, which further contributes to the fact that only the reel seat of the spinning machine has to be modified, while in all other parts the spinning machine and the control program are kept completely unchanged can. As a result, the invention is also suitable for retrofitting existing spinning machines, because only an exchange of the roll holder is required. A pressure medium source, for example for compressed air or hydraulic fluid, is generally present anyway, so that, apart from a pressure control unit that may still be required, this does not involve any great additional outlay. With the new spinning machine, therefore, an improved product quality is achieved without great additional costs for appropriate equipping of the spinning machine and without additional processing steps or times being required.

Bevorzugte Ausgestaltungen und Weiterbildungen der Erfindung sind in den Unteransprüchen angegeben.Preferred refinements and developments of the invention are specified in the subclaims.

Im folgenden wird ein Ausführungsbeispiel der Erfindung anhand einer Zeichnung erläutert. Die Figuren der Zeichnung zeigen:

Figur 1
einen Rollenhalter in Grundstellung als Teil einer Drückmaschine, teils in Seitenansicht, teils im Längsschnitt, und
Figur 2
den Rollenhalter aus Figur 1 in Betriebsstellung.
An exemplary embodiment of the invention is explained below with reference to a drawing. The figures in the drawing show:
Figure 1
a roll holder in the basic position as part of a spinning machine, partly in side view, partly in longitudinal section, and
Figure 2
the roll holder of Figure 1 in the operating position.

Wie die Figur 1 der Zeichnung zeigt, besteht das hier dargestellte Ausführungsbeispiel eines Rollenhalters 1 im wesentlichen aus einem mit einer hier nicht dargestellten Supportanordnung einer Drückmaschine verbindbaren festen Halterteil 2 und einem gegenüber diesen verschieblichen Halterteil 3. An seinem der Supportanordnung zugewandten Ende, d.h. in der Figur 1 rechts, ist der feste Halterteil 2 mit einem Zylinder 20 ausgebildet, der mittels eines Zylinderbodens 21 zur Supportanordnung hin geschlossen ist. Der Zylinderboden 21 ist hier unter Zwischenlage eines Dichtringes 26' lösbar mit dem übrigen Teil des festen Halterteils 2 verbunden und besitzt einen zentralen, die Form einer gestuften Bohrung aufweisenden Druckmediumanschluß 22 zur Zu- und Abführung eines Druckmediums. Oberhalb und unterhalb dieses Zylinders 20 sind Verbindungsflansche 23 mit Bohrungen 23' vorgesehen, mittels welcher eine lösbare Verbindung des Rollenhalters 1 mit der Supportanordnung erfolgen kann.As FIG. 1 of the drawing shows, the exemplary embodiment of a roll holder 1 shown here essentially consists of a fixed holder part 2, which can be connected to a support arrangement (not shown here) of a spinning machine, and a holder part 3 that is displaceable relative to the latter 1 right, the fixed holder part 2 is formed with a cylinder 20, which by means of a cylinder base 21 for support arrangement is closed. The cylinder base 21 is detachably connected here with the interposition of a sealing ring 26 'to the remaining part of the fixed holder part 2 and has a central pressure medium connection 22, which has the shape of a stepped bore, for supplying and removing a pressure medium. Above and below this cylinder 20 there are connecting flanges 23 with bores 23 ', by means of which a releasable connection of the roll holder 1 to the support arrangement can take place.

In seinem von der Supportanordnung abgewandten, d.h. in der Zeichnung linken Teil trägt der feste Halterteil 2 einen Führungskörper 24, der sich in Längsrichtung des Rollenhalters 1 erstreckt.In its averted from the support arrangement, i.e. in the drawing on the left part, the fixed holder part 2 carries a guide body 24 which extends in the longitudinal direction of the roll holder 1.

In diesem Führungskörper 24 ist ein einen Teil des verschieblichen Halterteils 3 bildendes Schubstück 34 spielfrei und reibungsarm geführt. An seinem inneren, d.h. in der Figur 1 rechten Ende ist das Schubstück 34 mit der Stirnseite 31 eines Kolbens 30 verbunden, welcher in dem Zylinder 20 unter Abdichtung durch einen zwischenliegenden Dichtring 26 verschieblich geführt ist. An seinem äußeren, d.h. in der Zeichnung linken Ende, trägt das Schubstück 34 einen Drückrollenlagerkörper 32, auf dem eine Drückrolle 10 um eine Drehachse 10' drehbar gelagert ist. Die Verbindung zwischen dem Schubstück 34 und dem Drückrollenlagerkörper 32 erfolgt hier mittels einer in Richtung der Drehachse 10' verlaufenden Schraube 33, wodurch ein einfacher Austausch des Druckrollenlagerkörpers 32 mit der Drückrolle 10 ermöglicht wird.In this guide body 24 a part 34 of the displaceable holder part 3 is guided free of play and with little friction. On its inner, i.e. in the right end of FIG. 1, the thrust piece 34 is connected to the end face 31 of a piston 30, which is displaceably guided in the cylinder 20 with a seal by an intermediate sealing ring 26. On its outer, i.e. in the left end of the drawing, the thrust piece 34 carries a pressure roller bearing body 32, on which a pressure roller 10 is rotatably mounted about an axis of rotation 10 '. The connection between the thrust piece 34 and the pressure roller bearing body 32 takes place here by means of a screw 33 running in the direction of the axis of rotation 10 ′, whereby a simple exchange of the pressure roller bearing body 32 with the pressure roller 10 is made possible.

Bei Beschickung des Inneren des Zylinders 20 mit dem Druckmedium durch den Druckmediumanschluß 22 wird der Kolben 30 mit einer von dem Druck des Druckmediums abhängigen Kraft in Ausschubrichtung vorbelastet. Der Hub des Kolbens 30 und damit auch des Schubstückes 34 und der Drückrolle 10 wird durch einen Anschlag 25 begrenzt, der oberhalb des Schubstückes 34 angeordnet ist und einen Teil des festen Halterteils 2 bildet. An dem Schubstück 34 ist an dessen Oberseite ein Anschlagnocken 35 angebracht, der in der in Figur 1 gezeigten Grundstellung des Rollenhalters 1 an dem Anschlag 25 anliegt. Zur Einstellung unterschiedlicher maximaler Hübe ist der Anschlag 25 verstellbar ausgebildet, wobei hier zu diesem Zweck ein Anschlagträger 25' vorgesehen ist, der parallel zum Schubstück 34 verläuft und auf welchem der Anschlag 25 nach Lösen einer Schraube verschiebbar und durch Anziehen der Schraube wieder festlegbar ist.When the interior of the cylinder 20 is loaded with the pressure medium through the pressure medium connection 22, the piston 30 is preloaded in the direction of extension with a force dependent on the pressure of the pressure medium. The stroke of the piston 30 and thus also the thrust piece 34 and the pressure roller 10 is limited by a stop 25, which is arranged above the thrust piece 34 and forms part of the fixed holder part 2. On the top of the thrust piece 34, a stop cam 35 is attached, which in the basic position of the roller holder 1 shown in FIG. 1 bears against the stop 25. To set different maximum strokes, the stop 25 is designed to be adjustable, with a stop support 25 ′ being provided here for this purpose, which runs parallel to the thrust piece 34 and on which the stop 25 can be displaced after loosening a screw and fixed again by tightening the screw.

In Figur 2 der Zeichnung ist der Rollenhalter 1 nun in einer Betriebsstellung gezeigt, in welcher er mit einer Supportanordnung 4, die hier nur ansatzweise angedeutet ist, verbunden ist und in welcher die Drückrolle 10 an einem Werkstück 11 anliegt, welches seinerseits zusammen mit einem formgebenden, rotationssymmetrischen Futter 12 um eine hier nicht dargestellte Drückmaschinen-Spindelachse rotiert. Die Spindelachse verläuft bei derartigen Bearbeitungen üblicherweise unter einem Winkel zwischen etwa 20 und 90° zur Drehachse 10' der Drückrolle 10, welche ihrerseits durch das rotierende Futter 12 und Werkstück 11 in Drehung versetzt wird.In Figure 2 of the drawing, the roll holder 1 is now shown in an operating position in which it is connected to a support arrangement 4, which is only hinted at here, and in which the pressure roller 10 rests on a workpiece 11, which in turn together with a shaping , rotationally symmetrical chuck 12 rotates about a spinning machine spindle axis, not shown here. In such machining operations, the spindle axis usually runs at an angle between approximately 20 and 90 ° to the axis of rotation 10 ′ of the spinning roller 10, which in turn is set in rotation by the rotating chuck 12 and workpiece 11.

Aus der Figur 2 ist weiter ersichtlich, daß in dem hier dargestellten Ausführungsbeispiel die Supportanordnung 4 über eine integrierte Druckmediumleitung 42 verfügt, wodurch bei Montage des Rollenhalters 1 an der Supportanordnung 4 automatisch eine Verbindung zu einer Versorgungseinrichtung zur Zu- und Abführung des Druckmediums hergestellt wird.It can also be seen from FIG. 2 that in the exemplary embodiment shown here, the support arrangement 4 has an integrated pressure medium line 42, which means that when the roll holder 1 is mounted on the support arrangement 4, a connection to a supply device for supplying and discharging the pressure medium is automatically established.

Bei modernen Drückmaschinen wird üblicherweise ohne manuelle Eingriffe ein zuvor im Playback-Verfahren gespeichertes Bearbeitungsprogramm von der Drückmaschine unter der Kontrolle einer elektronischen Steuereinheit wiederholt abgearbeitet, wozu die Supportanordnung 4, die im allgemeinen einen Untersupport sowie einen quer dazu angeordneten Obersupport umfaßt, mittels von der Steuereinheit steuerbarer Verstelleinrichtungen so verfahren wird, daß die Drückrolle 10 die gewünschte Bewegung entlang des Werkstückes 11 und des Futters 12 ausführt. Da es sich hierbei um eine Positionssteuerung handelt, kann es bei unterschiedlichen Materialstärken des Werkstückes 11 oder bei anderen Ungenauigkeiten, wie sie durch Verschleiß oder Einstellfehler bei der Grundeinstellung auftreten können, zu einer Verschlechterung des Arbeitsergebnisses kommen, die dazu führen, daß die nach der Bearbeitung vorliegende Materialstärke des Werkstückes 11 nicht eingehalten wird oder die sogar soweit gehen können, daß das Werkstück 11 während der Bearbeitung abreißt. Dies wird bei dem Rollenhalter 1 dadurch vermieden, daß die von der Drückrolle 10 auf das Werkstück 11 ausübbare Kraft begrenzt wird. Die von der Drückrolle 10 auf das Werkstück ausgeübte Kraft 11 wird nämlich hier allein durch den im Inneren des Zylinders 20 herrschenden Druck des Druckmediums bestimmt, der in weiten Grenzen regelbar ist. Dabei kann wahlweise der Druck während der gesamten Bearbeitung konstant gehalten werden, er kann aber auch, falls dies zweckmäßig ist, während der Bearbeitung gezielt verändert werden.In modern spinning machines, a machining program previously saved in the playback process is usually removed from the spinning machine without manual intervention Repeatedly processed under the control of an electronic control unit, for which purpose the support arrangement 4, which generally comprises a sub-support and an upper support arranged transversely thereto, is moved by means of adjusting devices which can be controlled by the control unit in such a way that the pressure roller 10 performs the desired movement along the workpiece 11 and Feed 12 runs. Since this is a position control, different material thicknesses of the workpiece 11 or other inaccuracies, such as those that can occur due to wear or setting errors in the basic setting, can lead to a deterioration in the work result, which can lead to post-processing existing material thickness of the workpiece 11 is not maintained or can even go so far that the workpiece 11 tears off during processing. This is avoided in the roll holder 1 by limiting the force that can be exerted on the workpiece 11 by the pressure roller 10. The force 11 exerted by the pressure roller 10 on the workpiece is determined here solely by the pressure of the pressure medium prevailing inside the cylinder 20, which pressure can be regulated within wide limits. The pressure can optionally be kept constant during the entire processing, but it can also, if appropriate, be specifically changed during the processing.

Bei unterschiedlichen Materialstärken oder sonstigen mechanischen Abweichungen des Werkstückes 11, die sich ansonsten auf die von der Drückrolle 10 auf das Werkstück 11 ausgeübten Kraft niederschlagen würden, spielen hier keine Rolle mehr, da die Drückrolle 10 mit dem Schubstück 34 und dem Kolben 30 dynamisch ein- und ausfedern kann, wobei dieses Bewegungsspiel wegen der geringen zu bewegenden Massen sehr reaktionsschnell, d.h. mit sehr geringer Trägheit erfolgt. Durch die Verwendung der Kolben-Zylinder-Anordnung 20, 30, die mit dem Druckmedium beschickbar ist, wird zudem eine lineare Charakteristik erreicht, d.h. die von der Drückrolle 10 auf das Werkstück 11 ausgeübte Kraft ist weitestgehend unabhängig von der gerade vorhandenen Verschiebungsstellung des verschieblichen Halterteils 3 gegenüber dem festen Halterteil 2. Als Druckmedium kann beispielsweise Druckluft oder Hydraulikflüssigkeit verwendet werden, da Versorgungs- sowie Regeleinrichtungen zur gezielten Veränderung und Konstanthaltung des Druckes dieser Druckmedien am Aufstellungsort von Drückmaschinen im allgemeinen ohnehin vorhanden sind.In the case of different material thicknesses or other mechanical deviations of the workpiece 11, which would otherwise be reflected in the force exerted by the pressure roller 10 on the workpiece 11, no longer play a role here, since the pressure roller 10 dynamically engages with the thrust piece 34 and the piston 30. and can rebound, this play of movement taking place very quickly due to the small masses to be moved, ie with very little inertia. Through the use of the piston-cylinder arrangement 20, 30, which with the pressure medium can be loaded, a linear characteristic is also achieved, ie the force exerted by the pressure roller 10 on the workpiece 11 is largely independent of the displacement position of the displaceable holder part 3 relative to the fixed holder part 2. The pressure medium used can be, for example, compressed air or hydraulic fluid, since supply and control devices for the targeted change and maintenance of the pressure of these print media are generally available at the installation site of spinning machines anyway.

Claims (10)

  1. Metal spinning machine with at least one roller holder, wherein the roller holder with a roller which it holds for rotation is mounted on a tool rest system which permits a displacement of the roller in at least two coordinate directions relative to a workpiece to be formed by spinning, which workpiece can be mounted on a metal spinning machine spindle which can be driven in rotation, with a rotationally symmetrical chuck which is to shape it, the metal spinning machine being equipped with an apparatus limiting the force which can be exerted on the workpiece by the roller,
    characterized by the fact
    - that the roller holder (1) is constituted by two holder parts (2, 3) which are slidingly displaceable against one another, one of which is configured as a fixed holder part (2) which can be fastened to the tool rest system (4) and the other is configured as a displaceable holder part (3) bearing the roller,
    - that the one holder part (2) is configured with a cylinder (20) which can be fed a pressure medium from a pressure medium source of supply which can be held under a predeterminable pressure,
    - that the other holder part (3) is configured with a piston (30) which can be driven in the extending direction by the pressure medium with a predeterminable force corresponding to the predeterminable pressure of the source of supply of the pressure medium, and
    - that by a force exerted on roller (10) by the workpiece (11) and exceeding the extending force of the piston (30), the roller (10) can be made to yield dynamically and with resilience, with displacement of pressure medium from the cylinder (20) into the pressure medium source of supply which can be kept at a predetermined pressure.
  2. Metal spinning machine according to claim 1, characterized in that the roller holder (1) is configured with a low-friction, snug-fitting and twist-resistant guide, a plunger (34) guided in the guide body (24), while a guide body (24) is associated with the fixed holder part (2) and a plunger carried in the guide body (24) is associated with the displaceable holder part (3), and the plunger (34) serving as a piston rod is joined at its one, inner end to the piston (30) and bears the roller (10) on its other, outer end.
  3. Metal spinning machine according to claim 2, characterized in that the guide (24, 34) is configured as a roller runner.
  4. Metal spinning machine according to claim 1, characterized in that the direction of the two holder parts (2, 3) against one another is substantially perpendicular to the axis of rotation (10') of the roller (10).
  5. Metal spinning machine according to claim 1, characterized in that the displacement stroke of the two holder parts (2, 3) against one another can be limited by a mechanical stop (25).
  6. Metal spinning machine according to claim 5, characterized in that the stop (25) is made adjustable for the adjustment of different maximum strokes.
  7. Metal spinning machine according to claim 1, characterized in that the roller holder (1) is equipped with a pressure medium connection carried outwardly from the interior of the cylinder (20) and accessible with the roller holder in the installed state, to which connection a flexible pressure medium conduit is attachable for the feeding in and removal of the pressure medium.
  8. Metal spinning machine according to claim 1, characterized in that the roller holder (1) is equipped with a pressure medium connection (22) carried outwardly from the interior of the cylinder (20), which when the roller holder (1) is attached to the tool rest system (4) can be brought automatically into sealing connection with a pressure medium conduit (42) lying within the tool rest system (4) for the feeding in and removal of the pressure medium.
  9. Metal spinning machine according to claim 1, characterized in that the displaceable holder part (3) can be additionally biased by means of at least one removable and exchangeable spring with a force acting in the extending direction.
  10. Metal spinning machine according to claim 9, characterized in that the spring is disposed in the interior of the cylinder (20) between its bottom (21) and the piston (30), and that the cylinder bottom (21) is joined releasably to the rest of the fixed holder part (2).
EP91120670A 1990-12-17 1991-12-02 Roll-forming machine with at least one holder for a forming roller Expired - Lifetime EP0491212B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT91120670T ATE103213T1 (en) 1990-12-17 1991-12-02 PRINTING MACHINE WITH AT LEAST ONE ROLL HOLDER.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4040300A DE4040300A1 (en) 1990-12-17 1990-12-17 PUSHING MACHINE WITH AT LEAST ONE ROLL HOLDER
DE4040300 1990-12-17

Publications (2)

Publication Number Publication Date
EP0491212A1 EP0491212A1 (en) 1992-06-24
EP0491212B1 true EP0491212B1 (en) 1994-03-23

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP91120670A Expired - Lifetime EP0491212B1 (en) 1990-12-17 1991-12-02 Roll-forming machine with at least one holder for a forming roller

Country Status (5)

Country Link
US (1) US5220817A (en)
EP (1) EP0491212B1 (en)
AT (1) ATE103213T1 (en)
DE (2) DE4040300A1 (en)
ES (1) ES2052318T3 (en)

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GB0605786D0 (en) * 2006-03-22 2006-05-03 Glaxo Group Ltd Compounds
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GB0718415D0 (en) 2007-09-20 2007-10-31 Glaxo Group Ltd Compounds
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KR101050361B1 (en) * 2010-05-27 2011-07-20 김위식 Manufacturing apparatus used spinning of pipe
CN102069122A (en) * 2010-12-14 2011-05-25 大连瑞谷科技有限公司 Rolling locking notch technology for cylindrical roller copper retainer
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EP3398698B1 (en) * 2017-05-05 2019-08-07 Leifeld Metal Spinning AG Device and method for incremental reforming of a metallic workpiece
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Also Published As

Publication number Publication date
EP0491212A1 (en) 1992-06-24
DE59101239D1 (en) 1994-04-28
DE4040300A1 (en) 1992-07-02
ATE103213T1 (en) 1994-04-15
US5220817A (en) 1993-06-22
ES2052318T3 (en) 1994-07-01

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