EP1758696B1 - Hybrid drawing cushion facility - Google Patents
Hybrid drawing cushion facility Download PDFInfo
- Publication number
- EP1758696B1 EP1758696B1 EP05761755A EP05761755A EP1758696B1 EP 1758696 B1 EP1758696 B1 EP 1758696B1 EP 05761755 A EP05761755 A EP 05761755A EP 05761755 A EP05761755 A EP 05761755A EP 1758696 B1 EP1758696 B1 EP 1758696B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pressure
- pressure cheek
- cushion apparatus
- drawing cushion
- cheek
- 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.)
- Not-in-force
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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
- B21D24/00—Special deep-drawing arrangements in, or in connection with, presses
- B21D24/02—Die-cushions
-
- 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
- B21D22/20—Deep-drawing
-
- 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
- B21D24/00—Special deep-drawing arrangements in, or in connection with, presses
- B21D24/10—Devices controlling or operating blank holders independently, or in conjunction with dies
Definitions
- the invention relates to a die cushion apparatus for a forming press, wherein the movement of the sheet holder is controlled with a combination of electric motors and fluid cylinder.
- a die cushion device according to the preamble of claim 1 is known from DE 4 100 716 A known.
- proportional or servo valves are used to control or regulate the pressures in the sheet holder and thus to control the blank holder force, wherein the blank holder cylinder is associated with a sensor via a control unit, the desired pressure change in the blank holder cylinder in dependence on the respective drawing progress regulated by means of proportional or servo valves.
- a simple press ram is available.
- a drawing punch is fastened on the clamping plate of a press table with single-acting presses, while an additional sheet holder is slidably mounted on it and stands from below over a plurality of pressure pins under the action of a pressure cheek.
- the drawing die is attached to the press ram (sheet metal profiles, page 44/45).
- hydraulic cylinders are used to condition a controllable force on the pressure cheek.
- path functions such as pre-acceleration, run-up, safety-oriented holding in locking positions
- draw depth adjustment are not inconsiderable mechanical, fluid and control engineering expenses required.
- hydraulically defined minimum values can not be undershot.
- the invention is based on the object, starting from the prior art, a die cushion device to improve so that when reducing the control and regulatory effort, the control behavior is improved, and that with a compact design possible a variable force distribution on the blank holder is made possible.
- the core idea of the invention is to utilize both the advantages of the hydraulic die cushion and the electrically driven die cushion. This is achieved by a die cushion device according to hybrid system in a combination of fluid cylinders and one or more acting on the pressure arm electric drives, wherein the fluid cylinder, the power function at a high level and the electric drive the Wegfunktion, such as pre-acceleration and acceleration, and the power function low level with deactivated fluid cylinders takes over.
- the power and / or travel function of the electric drive on the one hand by means of a direct drive designed linear motor and on the other hand are transmitted by servo motor with mechanical translation to the pressure cheek.
- the linear motors can be arranged in the interior of the pressure cheek, for example centrally between the fluid cylinders.
- direct energy conversion into a linear path function can be dispensed with elaborate mechanical, increased moments of inertia causing translations.
- the secondary part belonging to the linear motor is fastened to the pressure cheek, which, depending on the force requirement, faces one or more primary parts mounted in the press table.
- the linear motors in the outer region of the pressure cheek.
- the secondary part can be mounted both on the pressure cheek, as well as in the press table.
- the external linear motor also allows in applications of multi-part pressure cheeks sharing of primary or secondary part by adjacent die cushion devices.
- linear motors instead of linear motors are servomotors with a mechanical translation as a linear transducer, for example, as an electric cylinder with spindle and spindle nut applicable, which are preferably arranged centrally between the fluid cylinders and operatively connected to the pressure cheek.
- mechanical translations are alternatively a rack with pinion and a lever mechanism between servo motor and pressure cheek possible.
- the electric drives for coordination with the movement of ram and workpiece transport elements via a guide shaft connected to the plant control, whereby a permanent position control within the path functions is feasible.
- FIG. 1 shows a simplified representation of the section of a press with arranged in the press table 1 die cushion device 2 as a multi-point design.
- the longitudinally guided in the press table 1 pressure cheek 3 is connected via pressure pin 4 with the plate holder 5 of the lower tool in operative connection.
- sheet metal force between the pressure cheek 3 and press table 1 fluid cylinder 6 are arranged.
- the sectional view shows the first row with four fluid cylinders 6 of a total of eight-point drawing device.
- the pressure cheek 3 is moved downwards by the movement of the tappet, wherein the control of the blank holder force along the drawing path by a valve-controlled displacement of the fluid from the fluid cylinders 6 takes place.
- linear motors 7 are used, the primary and secondary parts 8,9 preferably between press table 1 and pressure cheek 3 are arranged.
- the need-based arrangement of the primary parts 8 on the pressure cheek 3 or on the press table 1 is possible.
- a plurality of linear motors 7 can be arranged along the pressure cheek 3.
- the linear motors 7 can either simultaneously take over the guiding function of the pressure cheek 3 or the primary and secondary parts 8, 9 are arranged independently of additional guide elements.
- adjacent pressure cheeks use a common primary or secondary part.
- the associated secondary parts are operatively connected to the pressure cheeks of the adjacent die cushion device. It is also conceivable to arrange the secondary parts on the pressure cheeks, which are each in operative connection with an intermediate, jointly usable primary part.
- a second advantageous embodiment according to FIG. 2 is the linear motor 7 for generating the path function in the inner region of the pressure cheek 3, approximately centrally disposed between the fluid cylinders 6.
- FIG. 3 shows a die cushion device 2 according to a third embodiment with an acting on the pressure cheek 3 electric cylinder 10.
- the electric cylinder 10 is arranged approximately centrally in the middle between the surrounding fluid cylinders 6.
- a system spindle / spindle nut 12, 11 are used.
- the spindle nut 11 connected to the pressure cheek 3 is non-rotatable and axially synchronous with the pressure cheek 3 movable.
- the associated spindle 12 is axially fixed in the press table 1 rotatably mounted.
- the remote from the spindle nut 11 end of the spindle 12 is connected via a coupling 13 with a servo motor 14 in operative connection. It is also possible to dispense with additional transmission elements, the extended shaft of the spindle as a rotor of the servo motor 14.
- cycle cycle repeat each press cycle the following functions in the die cushion device 2 according to the hybrid system.
- the sheet metal holder 5 Before placing the upper tool mounted on the plunger, not shown, on the sheet metal holder 5 located in the lower tool, the sheet metal holder 5 is pre-accelerated with the board or molded part intended for forming in order to avoid a disadvantageous impact load in the direction of the plunger movement.
- the electric drive 15, either as a servomotor 14 or linear motor 7 is driven in operative connection with a position measuring system or via guide shaft for plunger movement, so that after a defined acceleration path, the upper tool on the plate holder 5 occurs with a übrendebn relative speed. After building up a defined pressure in the fluid cylinders 6, the drawing force required for forming the blank or the molded part is achieved.
- the movement of the pressure cheek 3 is done passively during the drawing process by the movement of the plunger.
- both the pulling force per fluid cylinder 6 can be varied in this drawing phase, as well as temporally differing pulling forces between adjacent fluid cylinders 6 are adjusted according to the technological requirements.
- the moving elements of the Electric drive 15 are during this drawing process either in an idling phase or can regenerate energy by switching to the generator mode in an advantageous manner.
- a synchronous movement of the die cushion device 2 takes place both to the main movement of the plunger, as well as the secondary movement of, for example workpiece transport elements, so that a collision freedom is secured even with a narrow tolerance window.
Abstract
Description
Die Erfindung betrifft eine Ziehkissen-Vorrichtung für eine Umformpresse, bei der die Bewegung des Blechhalters mit einer Kombination aus Elektromotoren und Fluidzylinder gesteuert wird. Eine Ziehkissen-Vorrichtung gemäß dem Oberbegriff des Anspruchs 1 ist aus der
Mechanische und hydraulische Pressen sind Maschinen der Umformtechnik zur Bearbeitung von Werkstücken und insbesondere Blechteilen. Zum Umformen von Ziehteilen ist es erforderlich, das Werkstück in spezieller Weise zwischen dem Oberwerkzeug und dem Unterwerkzeug der Presse einzuspannen, wobei verschiedenartige Blechhaltesysteme bekannt sind. Aus der
Bei dieser bekannten Einrichtung werden zur Steuerung bzw. Regelung der Drücke in den Blechhaltergarnituren und damit zur Regelung der Blechhalterkraft Proportional- oder Servoventile eingesetzt, wobei dem Blechhalterzylinder ein Sensor zugeordnet ist, der über ein Steuergerät die gewünschte Druckänderung im Blechhalterzylinder in Abhängigkeit von dem jeweiligen Ziehfortschritt mittels der Proportional- oder Servoventile regelt.In this known device proportional or servo valves are used to control or regulate the pressures in the sheet holder and thus to control the blank holder force, wherein the blank holder cylinder is associated with a sensor via a control unit, the desired pressure change in the blank holder cylinder in dependence on the respective drawing progress regulated by means of proportional or servo valves.
Bei einfach wirkenden Pressen ist demgegenüber nur ein einfacher Pressenstößel vorhanden. Durch eine Anordnung eines zusätzlichen Ziehapparates im Pressentisch wird bei einfach wirkenden Pressen ein Ziehstempel auf der Aufspannplatte eines Pressentisches befestigt, während ein zusätzlicher Blechhalter auf ihm verschiebbar gelagert ist und von unten her über mehrere Druckstifte unter Einwirkung einer Druckwange steht. Dabei ist die Ziehmatrize am Pressenstößel befestigt (Bleche Rohre Profile, Seite 44/45).For single-acting presses on the other hand only a simple press ram is available. By arranging an additional pulling apparatus in the press table, a drawing punch is fastened on the clamping plate of a press table with single-acting presses, while an additional sheet holder is slidably mounted on it and stands from below over a plurality of pressure pins under the action of a pressure cheek. The drawing die is attached to the press ram (sheet metal profiles, page 44/45).
In der
Für Werkstücke, die eine asymmetrische Kraftbeaufschlagung erfordern, können damit unterschiedliche Drücke zur Blechhalterung erzeugt werden. Es folgt eine Kraftregulierung für eine differenzierte Unterstützung der Druckwange, wobei diese die unterschiedliche Kraft auf die Blechhalteeinrichtung bzw. das Werkstück weiterleitet. Aus der
Bei allen oben beschriebenen Ziehkissenvorrichtungen werden zur Aufbereitung einer regelbaren Kraft auf die Druckwange, Hydraulikzylinder eingesetzt. Für die Erzeugung der Wegfunktionen, wie Vorbeschleunigung, Hochlauf, sicherheitsgerechtes Halten in Rastpositionen, Ziehtiefenverstellung sind nicht unerhebliche mechanische, fluid- und steuerungstechnische Aufwendungen erforderlich. Zur Vermeidung von Kollisionen zwischen der Bewegung der Ziehkissenvorrichtung und beispielsweise den Formteil-Transportelementen entstehen erhöhte Aufwendungen zur Bewegungskontrolle. Bei der Regelung der Ziehkräfte können hydraulisch bedingt definierte Minimalwerte nicht unterschritten werden.In all die cushion devices described above, hydraulic cylinders are used to condition a controllable force on the pressure cheek. For the generation of the path functions, such as pre-acceleration, run-up, safety-oriented holding in locking positions, draw depth adjustment are not inconsiderable mechanical, fluid and control engineering expenses required. To avoid collisions between the movement of the die cushion device and, for example, the molded part-transport elements incur increased expenses for motion control. When controlling the pulling forces, hydraulically defined minimum values can not be undershot.
In jüngster Zeit sind Ziehkissen bekannt geworden, bei denen die Kissenkraft mittels elektrischer Antriebe erzeugt wird.Recently, die cushions have become known in which the cushion force is generated by means of electric drives.
In der
Aus der
Nachteilig an diesen Ausführungen ist die Kopplung der einzelnen Antriebsmotoren. Insbesondere in Großpressen mit Mehrpunktzieheinrichtungen und einteiliger Druckwange ist es bei schwierig umzuformenden Teilen erforderlich, die einzelnen Druckpunkte mit unterschiedlichen und während des Ziehvorganges variablen Kräften zu beaufschlagen. Beide oben beschriebene elektrisch betätigte Ziehkissen haben den Nachteil, dass sie aufgrund der großen Anzahl von mechanischen Bewegungsübertragungsmittel einen großen Bauraum erfordern, welcher in der Regel aber nicht vorhanden ist.A disadvantage of these designs is the coupling of the individual drive motors. Especially in large presses with Mehrpunktzieheinrichtungen and one-piece pressure cheek is difficult to be formed parts necessary to apply the individual pressure points with different and variable during the drawing forces. Both electrically operated die cushion described above have the disadvantage that they require a large amount of space due to the large number of mechanical motion transmission means, which is usually not available.
Nach
Der Erfindung liegt die Aufgabe zugrunde, ausgehend vom Stand der Technik, eine Ziehkissen-Vorrichtung so zu verbessern, dass bei Reduzierung des Steuerungs- und Regelungsaufwandes das Regelverhalten verbessert wird, und dass bei einer möglichst kompakten Bauform eine variable Kraftverteilung am Blechhalter ermöglicht wird.The invention is based on the object, starting from the prior art, a die cushion device to improve so that when reducing the control and regulatory effort, the control behavior is improved, and that with a compact design possible a variable force distribution on the blank holder is made possible.
Diese Aufgabe wird ausgehend von einer Ziehkissen-Vorrichtung mit Hybrid-Antrieb nach dem Oberbegriff des Anspruch 1, durch die kennzeichnenden Merkmale des Anspruch 1 gelöst. In den Unteransprüchen sind vorteilhafte und zweckmäßige Weiterbildungen der Vorrichtung angegeben.This object is achieved on the basis of a die cushion device with hybrid drive according to the preamble of claim 1, by the characterizing features of claim 1. In the dependent claims advantageous and expedient developments of the device are given.
Der Kerngedanke der Erfindung ist, sowohl die Vorteile der hydraulischen Ziehkissen, als auch der elektrisch angetriebenen Ziehkissen zu nutzen. Erreicht wird dies durch eine Ziehkissen-Vorrichtung nach Hybrid-System in einer Kombination von Fluidzylindern und einem oder mehreren auf die Druckwange wirkenden Elektroantrieben, wobei die Fluidzylinder die Kraftfunktion auf hohem Niveau und der Elektroantrieb die Wegfunktion, wie Vorbeschleunigung und Hochlauf, sowie die Kraftfunktion auf niedrigem Niveau bei deaktivierten Fluidzylindern übernimmt. Dabei kann die Kraft- und/oder Wegfunktion des Elektroantriebes einerseits mittels eines als Direktantrieb ausgestalteten Linearmotors und andererseits mittels Servomotor mit mechanischer Übersetzung auf die Druckwange übertragen werden.The core idea of the invention is to utilize both the advantages of the hydraulic die cushion and the electrically driven die cushion. This is achieved by a die cushion device according to hybrid system in a combination of fluid cylinders and one or more acting on the pressure arm electric drives, wherein the fluid cylinder, the power function at a high level and the electric drive the Wegfunktion, such as pre-acceleration and acceleration, and the power function low level with deactivated fluid cylinders takes over. In this case, the power and / or travel function of the electric drive on the one hand by means of a direct drive designed linear motor and on the other hand are transmitted by servo motor with mechanical translation to the pressure cheek.
Die Linearmotoren können im Innenbereich der Druckwange, beispielsweise zentrisch zwischen den Fluidzylindern angeordnet sein. Durch die direkte Energieumsetzung in eine lineare Wegfunktion kann auf aufwändige mechanische, erhöhte Trägheitsmomente verursachende Übersetzungen verzichtet werden. In vorteilhafter Weise ist das zum Linearmotor gehörende Sekundärteil an der Druckwange befestigt, dem je nach Kraftbedarf ein oder mehrere im Pressentisch gelagerte Primärteile gegenüberstehen.The linear motors can be arranged in the interior of the pressure cheek, for example centrally between the fluid cylinders. By direct energy conversion into a linear path function can be dispensed with elaborate mechanical, increased moments of inertia causing translations. Advantageously, the secondary part belonging to the linear motor is fastened to the pressure cheek, which, depending on the force requirement, faces one or more primary parts mounted in the press table.
Es ist ebenso möglich, die Linearmotoren im Außenbereich der Druckwange anzuordnen. Dabei kann das Sekundärteil sowohl an der Druckwange, als auch im Pressentisch gelagert sein. Der außenliegende Linearmotor ermöglicht darüber hinaus bei Anwendungen von mehrteiligen Druckwangen eine gemeinsame Nutzung von Primär- oder Sekundärteil durch benachbarte Ziehkissen-Vorrichtungen.It is also possible to arrange the linear motors in the outer region of the pressure cheek. In this case, the secondary part can be mounted both on the pressure cheek, as well as in the press table. The external linear motor also allows in applications of multi-part pressure cheeks sharing of primary or secondary part by adjacent die cushion devices.
Anstelle von Linearmotoren sind Servomotoren mit einer mechanischen Übersetzung als Linearwandler, beispielsweise als Elektrozylinder mit Spindel und Spindelmutter anwendbar, die bevorzugt zentrisch zwischen den Fluidzylindern angeordnet und mit der Druckwange wirkverbunden sind. Als mechanische Übersetzungen sind alternativ eine Zahnstange mit Ritzel sowie ein Hebelmechanismus zwischen Servomotor und Druckwange möglich.Instead of linear motors are servomotors with a mechanical translation as a linear transducer, for example, as an electric cylinder with spindle and spindle nut applicable, which are preferably arranged centrally between the fluid cylinders and operatively connected to the pressure cheek. As mechanical translations are alternatively a rack with pinion and a lever mechanism between servo motor and pressure cheek possible.
In vorteilhafter Weise sind die Elektroantriebe zur Koordinierung mit der Bewegung von Stößel und Werkstücktransportelementen über eine Leitwelle mit der Anlagensteuerung verbunden, wodurch eine permanente Lagekontrolle innerhalb der Wegfunktionen realisierbar ist.Advantageously, the electric drives for coordination with the movement of ram and workpiece transport elements via a guide shaft connected to the plant control, whereby a permanent position control within the path functions is feasible.
Zur sicherheitsgerechten Verriegelung der Ziehkissen-Vorrichtung in einer Halteposition ist eine mit dem Elektroantrieb wirkverbundene Motorbremse aktivierbar. Zur Verbesserung der Energiebilanz der Presse ist eine Energierückspeisung als Bremsenergie bei einer Kraftaufbringung oder auch während des Kissenhochlaufes in das Elektronetz oder in den Energiekreislauf der Presse möglich.For safety-oriented locking of the die cushion device in a holding position operatively connected to the electric motor engine brake can be activated. To improve the energy balance of the press energy recovery as a braking energy at a force application or during the cushion run-up in the electronic network or in the energy cycle of the press is possible.
Weitere Einzelheiten und Vorteile der Erfindung sind aus den Figuren ersichtlich und in der nachfolgenden Beschreibung eines Ausführungsbeispiels näher dargestellt.
Es zeigen:
- Figur 1
- Ziehkissen-Vorrichtung nach Hybridsystem mit Linearmotoren außerhalb der Druckwange als Schnittdarstellung.
- Figur 2
- ziehkissen-Vorrichtung nach Hybridsystem mit Linearmotor innerhalb der Druckwange als Schnittdarstellung.
Figur 3- Ziehkissen-Vorrichtung nach Hybridsystem mit Elektrozylinder als Schnittdarstellung.
Figur 4- Weg-Zeit-Diagramm für Ziehkissen-Vorrichtung nach Hybridsystem
Show it:
- FIG. 1
- Die-cushion device according to hybrid system with linear motors outside the pressure cheek as a sectional view.
- FIG. 2
- Draw cushion device according to hybrid system with linear motor within the pressure cheek as a sectional view.
- FIG. 3
- Cushion device according to hybrid system with electric cylinder as a sectional view.
- FIG. 4
- Off-Time Diagram for Cushion Device After Hybrid System
Die im Pressentisch 1 längsgeführte Druckwange 3 steht über Druckbolzen 4 mit dem Blechhalter 5 des Unterwerkzeuges in Wirkverbindung. Zur Erzeugung der für den Ziehvorgang erforderlichen, gegen das Oberwerkzeug im nicht dargestellten Pressenstößel gerichteten, Blechhalterkraft sind zwischen Druckwange 3 und Pressentisch 1 Fluidzylinder 6 angeordnet. Die Schnittdarstellung zeigt dabei die erste Reihe mit vier Fluidzylindern 6 einer insgesamt Acht-Punkt-Ziehvorrichtung. Während der Ziehphase des Blechformteiles wird die Druckwange 3 durch die Bewegung des Stößels abwärts bewegt, wobei die Regelung der Blechhalterkraft entlang des Ziehweges durch eine ventilgesteuerte Verdrängung des Fluids aus den Fluidzylindern 6 erfolgt.The longitudinally guided in the press table 1
Zur Erzeugung der aktiv gesteuerten Wegfunktion, wie Vorbeschleunigung, Hochlauf einschließlich pick up, Rückfall und Halten in Rastphasen gemäß Diagramm für Hybridsystem nach Figur 4 kommen als Elektroantriebe 15 Linearmotoren 7 zum Einsatz, deren Primär- und Sekundärteile 8,9 vorzugsweise zwischen Pressentisch 1 und Druckwange 3 angeordnet sind. Dabei ist die bedarfsweise Anordnung der Primärteile 8 an der Druckwange 3 oder am Pressentisch 1 möglich. Je nach Kraftbedarf sind entlang der Druckwange 3 mehrere Linearmotoren 7 anordenbar. Dabei können die Linearmotoren 7 entweder gleichzeitig die Führungsfunktion der Druckwange 3 übernehmen oder die Primär- und Sekundärteile 8, 9 sind unabhängig von zusätzlichen Führungselementen angeordnet.To generate the actively controlled path function, such as pre-acceleration, startup including pick up, relapse and hold in rest phases according to diagram for hybrid system of Figure 4 come as electric drives 15 linear motors 7 are used, the primary and
Bei einer Ziehkissen-Vorrichtung mit mehrteiliger Druckwange ist es vorteilhaft, dass benachbarte Druckwangen ein gemeinsames Primär- oder Sekundärteil nutzen. Dabei sind im Fall der Anordnung des Primärteils im Pressentisch die zugehörigen Sekundärteile mit den Druckwangen der benachbarten Ziehkissen-Vorrichtung wirkverbunden. Es ist ebenso denkbar, die Sekundärteile an den Druckwangen anzuordnen, die jeweils mit einem zwischenliegenden, gemeinsam nutzbaren Primärteil in Wirkverbindung stehen.In a die cushion device with multi-part pressure cheek, it is advantageous that adjacent pressure cheeks use a common primary or secondary part. In this case, in the case of the arrangement of the primary part in the press table, the associated secondary parts are operatively connected to the pressure cheeks of the adjacent die cushion device. It is also conceivable to arrange the secondary parts on the pressure cheeks, which are each in operative connection with an intermediate, jointly usable primary part.
Bei einer zweiten vorteilhaften Ausgestaltung nach
Allen Ausgestaltungen ist gemeinsam, dass die elektrisch Energie des Linearmotors 7 direkt ohne zusätzliche mechanische Übersetzungen als geradlinige Wegfunktion über die Druckwange 3 auf den Blechhalter 5 wirkt. Dabei ist es möglich, dass je nach Anforderung an den Kraftbedarf mehrere, am Pressentisch 1 befestigte Primärteile 8 gemeinsam auf das mit der Druckwange 3 befestigte Sekundärteil 9 wirken.All configurations have in common that the electrical energy of the linear motor 7 acts directly without additional mechanical translations as a linear path function on the
Die mit der Druckwange 3 verbundene spindelmutter 11 ist drehfest, und axial synchron mit der Druckwange 3 beweglich. Die zugehörige Spindel 12 ist axialfest im Pressentisch 1 drehbar gelagert. Das von der Spindelmutter 11 abgewandte Ende der Spindel 12 steht über eine Kupplung 13 mit einem Servomotor 14 in Wirkverbindung. Es ist ebenso möglich, mit Verzicht auf zusätzliche Übertragungselemente die verlängerte Welle der Spindel als Rotor des Servomotors 14 zu nutzen.The
In Verbindung mit dem Weg-Zeit-Verlauf des in
Die Bewegung der Druckwange 3 erfolgt während des Ziehvorgangs passiv durch die Bewegung des Stößels. Entsprechend den aus dem Stand der Technik bekannten Fluidzylindern 6 können in dieser Ziehphase sowohl die Ziehkraft je Fluidzylinder 6 variiert, als auch zeitlich differierende Ziehkräfte zwischen benachbarten Fluidzylindern 6 entsprechend den technologischen Anforderungen eingestellt werden. Die beweglichen Elemente des Elektroantriebes 15 befinden sich während dieses Ziehvorgangs entweder in einer Leerlaufphase oder können durch Umschaltung in den Generatormodus in vorteilhafter Weise Energie rückspeisen.The movement of the
Es ist ebenso denkbar, dass bei kleineren Ziehkräften, die Elektroantriebe 15 durch widerstandsgesteuerte Bremsung im Generatorbetrieb die Kraftfunktionen übernehmen.It is also conceivable that with smaller pulling forces, the electric drives 15 take over the power functions by resistance-controlled braking in generator mode.
Nach Durchlauf des unteren Umkehrpunktes der Presse sind entsprechend
Bei unverzögerter Hochlaufbewegung folgt die Druckwange 3 der aufwärtsgerichteten Stößelbewegung zwecks Auswerfens des umgeformten Ziehteiles synchron. Dazu wird die Bewegungsrichtung des oder der Elektroantriebe 15 gewechselt und die Duckwange 3 im Motormodus aktiv angetrieben. Die Fluidzylinder 6 sind in dieser Phase druckseitig deaktiviert.With instantaneous run-up movement follows the
Es ist ebenso denkbar, bei verzögerter Hochlaufbewegung die Ziehkissen-Vorrichtung 2 nach Durchlauf des unteren Umkehrpunktes in ihrer Tiefstlage zu sperren. Die anschließende Hochlaufbewegung zur Übernahme einer neuen Platine oder Formteil erfolgt verzögert, ab einem definierten Hochlaufstart nach Leitwelle zur Stößelbewegung.It is also conceivable to block the die-cushion device 2 after passage of the lower reversal point in its lowest position with delayed start-up movement. The subsequent run-up movement to take over a new board or molded part is delayed, starting from a defined run-up start to Leitwelle for ram movement.
Während der leitwellengesteuerten Wegfunktionen erfolgt eine synchrone Bewegung der Ziehkissen-Vorrichtung 2 sowohl zur Hauptbewegung des Stößels, als auch zur Nebenbewegung von beispielsweise Werkstücktransportelementen, so dass eine Kollisionsfreiheit auch bei engem Toleranzfenster gesichert wird.During the guide shaft controlled path functions, a synchronous movement of the die cushion device 2 takes place both to the main movement of the plunger, as well as the secondary movement of, for example workpiece transport elements, so that a collision freedom is secured even with a narrow tolerance window.
- 11
- Pressentischpress table
- 22
- Ziehkissen-VorrichtungA die cushion device
- 33
- Druckwangepressure cheek
- 44
- Druckbolzenpushpin
- 55
- Blechhalterblankholder
- 66
- Fluidzylinderfluid cylinder
- 77
- Linearmotorlinear motor
- 88th
- Primärteilprimary part
- 99
- Sekundärteilsecondary part
- 1010
- Elektrozylinderelectric cylinders
- 1111
- Spindelmutterspindle nut
- 1212
- Spindelspindle
- 1313
- Kupplungclutch
- 1414
- Servomotorservomotor
- 1515
- Elektroantriebelectric drive
- 1616
- mechanische übersetzungmechanical translation
Claims (9)
- Drawing cushion apparatus for a metalworking press for controlling a sheet-holding force between tool bottom part and tool top part, in which the application of pressure to the pressure cheek (3) and its movement can be controlled by means of a combination of at least one fluid cylinder (6) and at least one electric drive (15), and at least one electric drive (15) is operatively connected to the pressure cheek (3), characterized in that at least one electric drive (15) is a linear motor (7), designed as a direct drive, or an electric cylinder (10) and is operatively connected to the pressure cheek (3), and the electric drives (15) are operatively connected to the ram movement sequentially via a guide shaft within the press cycle.
- Drawing cushion apparatus according to Claim 1, characterized in that the linear motor (7) is arranged inside the pressure cheek (3).
- Drawing cushion apparatus according to Claim 1, characterized in that the linear motor (7) is arranged outside the pressure cheek (3).
- Drawing cushion apparatus according to Claim 1, characterized in that, in the case of a multi-piece pressure cheek (3), the associated primary or secondary parts (8, 9) are operatively connected to a secondary or primary part (9, 8) which can be used jointly for adjacent pressure cheeks (3).
- Drawing cushion apparatus according to Claims 1 to 4, characterized in that the electric drives (15) can be equipped with a motor brake.
- Drawing cushion apparatus according to Claims 1 to 5, characterized in that the pressure cheek (3) can be locked using a controllable clamping device.
- Drawing cushion apparatus according to Claims 1 to 6, characterized in that braking energy produced in the electric drive (15) during the drawing stroke can be fed back in a regenerative manner into the energy circuit of the press or into the electrical network.
- Drawing cushion apparatus according to Claim 1, characterized in that a servomotor (14) and a mechanical transmission (16) in the form of a rack/pinion or spindle/spindle nut (12, 11) are integrated in a compact electric cylinder (10).
- Drawing cushion apparatus according to Claim 1, characterized in that the mechanical transmission (16) between electric drive (15) and pressure cheek (3) is realized by a lever mechanism.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102004030678A DE102004030678B4 (en) | 2004-06-24 | 2004-06-24 | Cushioning device with hybrid drive |
PCT/DE2005/001094 WO2006000188A1 (en) | 2004-06-24 | 2005-06-18 | Hybrid drawing cushion facility |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1758696A1 EP1758696A1 (en) | 2007-03-07 |
EP1758696B1 true EP1758696B1 (en) | 2008-04-30 |
Family
ID=34972652
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP05761755A Not-in-force EP1758696B1 (en) | 2004-06-24 | 2005-06-18 | Hybrid drawing cushion facility |
Country Status (9)
Country | Link |
---|---|
EP (1) | EP1758696B1 (en) |
JP (1) | JP5101276B2 (en) |
KR (1) | KR101012817B1 (en) |
CN (1) | CN100548524C (en) |
AT (1) | ATE393674T1 (en) |
BR (1) | BRPI0512612A (en) |
DE (2) | DE102004030678B4 (en) |
ES (1) | ES2306179T3 (en) |
WO (1) | WO2006000188A1 (en) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007301612A (en) * | 2006-05-12 | 2007-11-22 | Hitachi Zosen Fukui Corp | Die cushion device |
ES2343700T3 (en) * | 2006-11-30 | 2010-08-06 | Muller Weingarten Ag | TROQUEL SHOCK ABSORBER DEVICE WITH MODULAR HYBRID DRIVE. |
DE102009019408B4 (en) | 2009-04-29 | 2013-07-11 | Gräbener Pressensysteme GmbH & Co. KG | A method of operating a die cushion apparatus and die cushion apparatus |
DE102009050390A1 (en) | 2009-10-22 | 2011-04-28 | Müller Weingarten AG | Working method and apparatus for operating presses |
DE102011016669B4 (en) * | 2011-04-12 | 2016-03-24 | Schuler Pressen Gmbh | Method for operating a press with sub-drive and then operated press |
US20180264533A1 (en) * | 2014-10-06 | 2018-09-20 | Tom Thang | Stamping Press Bolster Adaptor For Suiting Different Die Binder Pin Patterns |
CN109187065B (en) * | 2018-09-14 | 2021-04-30 | 上海理工大学 | Full-automatic loading machine driven by linear motor |
CN109723700B (en) * | 2019-01-09 | 2020-01-03 | 太原理工大学 | Eight-shaft driven multipoint hydraulic stretching pad hydraulic system |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3242705C2 (en) * | 1982-11-19 | 1985-10-31 | Maschinenfabrik Müller-Weingarten AG, 7987 Weingarten | Compressed air device arranged in the press table of a single-acting drawing press |
DE3431162A1 (en) * | 1984-08-24 | 1986-03-06 | August Läpple GmbH & Co, 7100 Heilbronn | PRESS IN PARTICULAR TO BE USED FOR DRAWING AND DRAWING OPERATIONS |
JPS61111622U (en) * | 1984-12-25 | 1986-07-15 | ||
DE3640507C3 (en) * | 1986-11-27 | 1998-01-29 | Mueller Weingarten Maschf | Device for controlling the sheet metal holder force during the drawing process |
DE4100716A1 (en) * | 1991-01-14 | 1992-07-16 | Erfurt Umformtechnik Gmbh | Sheet metal hold-down device in single-acting press - has mechanical device to couple power transmission element |
JP3241803B2 (en) * | 1992-06-15 | 2001-12-25 | 株式会社小松製作所 | Press NC servo die cushion device |
JPH057945A (en) * | 1991-07-01 | 1993-01-19 | Komatsu Ltd | Die cushion device for press |
US5435166A (en) * | 1991-07-01 | 1995-07-25 | Kabushiki Kaisha Komatsu Seisakusho | Die cushion device for press |
JP3211904B2 (en) * | 1992-06-15 | 2001-09-25 | 株式会社小松製作所 | Press NC servo die cushion device |
JPH07195129A (en) * | 1994-01-07 | 1995-08-01 | Ishikawajima Harima Heavy Ind Co Ltd | Die cushion device |
JP2812201B2 (en) * | 1994-07-15 | 1998-10-22 | トヨタ自動車株式会社 | Press equipment |
DE19821159A1 (en) * | 1998-05-12 | 1999-11-25 | Johannes Huelshorst | Deep draw press |
JP3181888B2 (en) * | 1999-03-09 | 2001-07-03 | ユミックス株式会社 | Quiet structure of processing machine, quiet structure of press machine, silent type of drawing type and its silent run-up unit |
JP2002172487A (en) * | 2000-12-01 | 2002-06-18 | Sanken Seiki Kogyo Kk | Press |
-
2004
- 2004-06-24 DE DE102004030678A patent/DE102004030678B4/en not_active Expired - Fee Related
-
2005
- 2005-06-18 AT AT05761755T patent/ATE393674T1/en active
- 2005-06-18 DE DE502005003912T patent/DE502005003912D1/en not_active Expired - Fee Related
- 2005-06-18 JP JP2007516963A patent/JP5101276B2/en not_active Expired - Fee Related
- 2005-06-18 CN CNB2005800212606A patent/CN100548524C/en not_active Expired - Fee Related
- 2005-06-18 WO PCT/DE2005/001094 patent/WO2006000188A1/en active IP Right Grant
- 2005-06-18 EP EP05761755A patent/EP1758696B1/en not_active Not-in-force
- 2005-06-18 BR BRPI0512612-6A patent/BRPI0512612A/en not_active IP Right Cessation
- 2005-06-18 ES ES05761755T patent/ES2306179T3/en active Active
- 2005-06-18 KR KR1020077001806A patent/KR101012817B1/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
BRPI0512612A (en) | 2008-03-25 |
DE102004030678B4 (en) | 2006-03-30 |
ATE393674T1 (en) | 2008-05-15 |
EP1758696A1 (en) | 2007-03-07 |
WO2006000188A1 (en) | 2006-01-05 |
JP5101276B2 (en) | 2012-12-19 |
CN100548524C (en) | 2009-10-14 |
KR101012817B1 (en) | 2011-02-08 |
CN1976770A (en) | 2007-06-06 |
ES2306179T3 (en) | 2008-11-01 |
DE502005003912D1 (en) | 2008-06-12 |
JP2008503352A (en) | 2008-02-07 |
KR20070031412A (en) | 2007-03-19 |
DE102004030678A1 (en) | 2006-01-26 |
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