EP2457672A1 - Die cushion device - Google Patents
Die cushion device Download PDFInfo
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- EP2457672A1 EP2457672A1 EP11008440A EP11008440A EP2457672A1 EP 2457672 A1 EP2457672 A1 EP 2457672A1 EP 11008440 A EP11008440 A EP 11008440A EP 11008440 A EP11008440 A EP 11008440A EP 2457672 A1 EP2457672 A1 EP 2457672A1
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- EP
- European Patent Office
- Prior art keywords
- wedge
- press
- die
- cushion device
- frame
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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
- B21D24/00—Special deep-drawing arrangements in, or in connection with, presses
- B21D24/02—Die-cushions
Definitions
- the invention relates to a die cushion device according to the preamble of the independent claim 1.
- a die cushion device without active drive in which the holding force exerted by the pressure cheek against the press ram is generated by means of several spring assemblies.
- the spring assemblies are arranged in the press table such that the spring force acts in the horizontal direction.
- a wedge thruster By means of a wedge thruster, the horizontally acting spring force is deflected to the vertically movable pressure cheek of the die cushion device.
- the holding force which is applied by the pressure cheek against the press ram is not adjustable in this device, but is defined by the spring constant of the spring assemblies used.
- Die-cushion devices that allow control of the holding force, usually have a hydraulic drive.
- a hydraulic drive is relatively expensive to implement and is usually only suitable for large presses or presses with high pressing pressures.
- hydraulic drive presses and hydraulically driven die cushions are very large and therefore difficult to install, and also relatively expensive.
- EP 1 082 185 B1 is an electrically operated deep drawing press known. Both the press ram and the die cushion device of this press are driven by four electrically operated spindle drives. This electric drive can be implemented relatively inexpensively and is particularly worthwhile for small presses. Of the Electric drive can also be controlled relatively easily and synchronously and thus allows a uniformly over the entire pressure surface generated pressing force. However, in contrast to conventional hydraulic drives electrically operated spindle drives are relatively slow, whereby the speed with which press ram or die cushion pressure cheek can be moved, is relatively limited.
- a die cushion device is made JP 2003 211 231 A known.
- the holding force which is applied in this device by the pressure cheek of the die cushion against the press ram of the press, is generated by a gas pressure cylinder.
- the gas cylinder represents a closed system and is calibrated to a specific holding force. A regulation of the holding force during the press stroke of the press ram is therefore not possible.
- the holding force is determined solely by how far the gas cylinder is pushed together during the pressing process.
- the device comprises an adjustment mechanism to bias the gas cylinder or to adjust its vertical position relative to the vertically movable pressure cheek of the die cushion device, so that also the holding force generated by the gas pressure cylinder can be preset.
- the adjusting mechanism comprises a wedge thrust gear, which is arranged below the gas pressure cylinder and below the pressure cheek and is driven by a hydraulic cylinder.
- a disadvantage of this device is that the holding force acting from the pressure cheek of the die cushion device against the press ram of the press, during the pressing process can not be controlled.
- each of the wedge thrust gear in each case comprises a first wedge, which is arranged above the vertically movable press ram and firmly connected to the frame of the press. This first wedge forms an inclined plane inclined relative to the horizontal.
- each of the wedge thrust gears includes a further wedge disposed between the first wedge and the press ram and movable by means of a linear electric motor along the inclined plane of the first wedge. The second wedge thus slides with its inclined top along the inclined plane of the first wedge and with its horizontally oriented bottom along the top of the press ram.
- the second wedge is using of the electric motor between the first wedge, which is fixedly connected to the housing, and driven the press ram, so that the press ram moves in a pressing operation in the vertical direction downwards. Due to the fact that the second wedge can only have a limited length, the press ram in its lowermost position is no longer loaded uniformly but on one side by the second wedge offset relative to its starting position. For this reason, the press comprises a plurality of wedge thrust gears, which are offset from one another. For this reason and due to the large volume of construction is the off US 7,000,537 B2 known drive not suitable to be used as a drive for generating a holding force in a die cushion device that must be integrated in the most compact manner possible in the press table of a press.
- the drive of a press ram can not be readily used in a die cushion device, since the drives of die cushion and press ram mostly different requirements are made. Press rams are usually controlled path-dependent, whereas the drive of a die cushion usually has to allow a force-dependent control.
- the object is solved by the features of independent claim 1 of the present invention.
- the invention is based on a die cushion device for a press, for regulating a holding force which is exerted by a pressure cheek on the press ram of the press.
- the die cushion device further comprises a frame and a wedge thrust gear, wherein the holding force is adjustable by means of the wedge thruster.
- the wedge thrust mechanism is driven by at least one linear electric motor, wherein the holding force during a Pressenhubs by controlling the linear electric motor is adjustable.
- the combination of wedge thrust and linear electric motor allows rapid movement of the pressure cheek of the die cushion device, whereby the productivity of a press with a die cushion device according to the invention is in a range that otherwise can only be achieved with expensive hydraulic drives.
- the drive with a linear electric motor allows easy control and is easy and inexpensive to implement. Since linear electric motors can muster only a limited force, the required reduction is implemented with a wedge slide.
- a moving component is to be understood, by means of which a holding force can be exerted on the press ram of the press.
- This component may for example be a bolt with, if necessary, attached tool.
- the at least one linear electric motor is the only drive mode of the die cushion device for generating the holding force.
- the drive then builds very compact and can be controlled very accurately.
- the wedge push gear comprises a first wedge with a first wedge surface and a second wedge with a second wedge surface, wherein the pressure cheek is connected to the first wedge, the first wedge is slidably mounted in the frame in the direction of action of the holding force, and the second wedge along an adjustment direction, which has an angle to the effective direction of the holding force, is mounted displaceably in the frame.
- the first wedge surface and the second wedge surface are facing each other, so that a movement of the second wedge in the adjustment causes a movement of the first wedge in the effective direction of the holding force.
- the upper part of the die cushion apparatus can be kept very compact, whereby the die cushion device can be very easily integrated into the press table of a press. In terms of a compact design, it is advantageous if only a single wedge thrust gear is provided with a first wedge and a second wedge.
- the adjustment direction is horizontal.
- very little space in the vertical direction is required for accommodating the linear electric motor or motors. Again, this has a positive effect on the integration of the die cushion device in the press table of a press.
- the linear electric motor comprises a stator and a rotor, wherein the stator with the frame and the rotor are connected to the second wedge.
- the frame of the die cushion device is fixed, that is firmly connected to the housing of the press. Therefore, when the stator of the linear electric motor is connected to the frame, the wiring of the linear electric motor is also easy. There is no need to provide a flexible supply line.
- At least one rolling guide is provided in each case between the second wedge and the frame, and between the first wedge surface and the second wedge surface.
- sliding guides are also possible instead of rolling guides, but with rolling guides the friction is reduced and the stability and ease of movement are increased.
- At least one rolling guide is provided between the first wedge and the frame.
- This type of storage offers compared to pure guide surfaces or against sliding guides o.g. Advantages.
- the die cushion apparatus further comprises a control of the linear electric motor.
- the die cushion device further comprises a path measuring system for detecting the position of the pressure cheek.
- the displacement measuring system can be realized for example by a clock and a sensor. Both magnetic and optical or inductive sensors are suitable.
- the sensor is fixed to the frame, whereby the wiring of the sensor is simple and does not have to be designed flexibly.
- the clock which is scanned by the sensor, may be mounted on the pressure cheek itself or on the first wedge or possibly also on the second wedge. In the latter case, the Position of the pressure cheek calculated using the reduction ratio of the wedge push gear.
- a sensor or displacement measuring system and the linear electric motor itself can be used as a so-called integrated sensor.
- the die cushion apparatus further comprises a pressure sensor for detecting the holding force.
- a pressure sensor allows a force-dependent control of the die cushion device. This sensor can be integrated in the pressure cheek, for example in a pin of the pressure cheek or in an attached tool.
- the invention also provides a press with a press table, a press ram, and a die cushion apparatus according to the invention in which the frame of the die cushion apparatus is integrated with and connected to the press table.
- the frame of the die cushion device can be both fixedly connected to the press table and, for example, in the horizontal direction, adjustable.
- FIG. 1 shows a front view of a press 2 with a die cushion device according to the invention 1.
- the press 2 comprises a press table 23 and a press ram 3, which is movable relative to the press table 23 in the vertical direction by means of the threaded spindles 24.
- Each threaded spindle 24 is assigned a spindle drive 25 for this purpose.
- the press table 23 is shown partially cut so that the die cushion device 1 integrated in the press table 23 is visible.
- the frame 4 of the invention is shown partially cut so that the die cushion device 1 integrated in the press table 23 is visible.
- Cushioning device 1 is connected to the press table 23.
- the wedge thrust gear 5 of the die cushion device 1 which forms the drive of the existing of the bolt 7 and the tool 8 pressure cheek.
- the bolt 7 can be moved in the vertical direction with the aid of the wedge thrust mechanism 5 and projects in the illustrated case out of the top of the press table 23. Between the patch on the bolt 7 tool 8 and the press ram 3, a sheet is clamped in a deep drawing process.
- FIG. 1 illustrated die cushion device 1 is slightly larger in FIG. 2 shown.
- the view corresponds to a section along the in FIG. 3 drawn section line 11.
- FIG. 3 turn is a cut along in FIG. 2 illustrated section line III.
- the bolt 7 is in the frame 4 of the die cushion device 1 in the vertical direction, which corresponds to the effective direction 13 of the bolt 7 applied to the press ram 3 holding force, out.
- the patch on the bolt 7 tool 8 is in the Figures 2 and 3 not shown. It should also be noted that the FIGS. 1 to 3 only represent schematic representations of the die cushion device according to the invention.
- the first wedge 9 is the same as the bolt 7 in the vertical direction 13 in the frame 4 out. Shown are only lateral guide surfaces, but also rolling bearings or plain bearings between the frame 4 and the first wedge 9 may be provided.
- the underside of the first wedge 9, hereinafter referred to as the first wedge surface lies in an inclined plane which has an angle of approximately 5 ° relative to the horizontal. The reduction ratio of the wedge thruster 5 is determined by this angle. This angle is preferably in a range between 3 ° and 8 °.
- the first wedge surface is designated by the reference numeral 11.
- a second wedge 10 is arranged, which is mounted in the horizontal adjustment 14 movable in the frame 4.
- two Wälz exchangeen 17 are arranged between the horizontally oriented bottom of the second wedge 10 and the bottom plate 26 of the frame 4.
- the upper side 12 of the second wedge 10 hereinafter referred to as the second wedge surface, runs parallel to the first wedge surface 11 of the first wedge 9.
- two rolling guides 18 are likewise arranged.
- the second wedge 10 serve two linear electric motors 6, which, as in FIG. 3 are arranged on both sides of the second wedge 10 between the frame 4 and the wedge 10.
- the stators 15 of the two linear electric motors 6 are fixedly connected to the frame 4, the rotor 16 of the two motors are mounted on the wedge 10.
- the die-cushion device 1 further comprises a controller 19, with which the two linear electric motors 6 are driven.
- the controller 19 allows both a path-dependent and a force-dependent control of the die cushion device.
- the controller 19 must be able to detect the position of the bolt 7 and the position of the first wedge 9.
- a timing ruler 20 is attached to the bolt 7, which is scanned via the sensor 21.
- the system also allows a force-dependent control, in which case the force acting between the bolt 7 and the press ram 3 must be measured.
- the die-cushion device 1 comprises a pressure sensor 22 which is integrated in the bolt 7. The signals of the sensors 21 and 22 are read out by the controller 19 and evaluated.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
Description
Die Erfindung betrifft eine Ziehkissen-Vorrichtung nach dem Oberbegriff des unabhängigen Anspruchs 1.The invention relates to a die cushion device according to the preamble of the
In der Umformtechnik werden mechanische und hydraulische Pressen zur Bearbeitung von Werkstücken und insbesondere Blechteilen eingesetzt. Zum Umformen von Ziehteilen ist es erforderlich, das umzuformende Blech in spezieller Weise zwischen dem Oberwerkzeug der Presse, auch Pressenstößel genannt, und dem Unterwerkzeug der Presse einzuspannen. Hierzu kommen Ziehkissen-Vorrichtungen zum Einsatz, mit Hilfe derer während des Pressenhubs des Pressenstößels eine Haltekraft auf den Pressenstößel ausgeübt werden kann. Das tiefzuziehende Blech wird dabei zumeist am Rand bzw. partiell von einer sogenannten Druckwange der Ziehkissen-Vorrichtung gegen den Pressenstößel gepresst. Die Druckwange bewegt sich in der Regel gleichförmig mit dem Pressenstößel mit.In forming technology, mechanical and hydraulic presses are used to machine workpieces and especially sheet metal parts. For forming drawn parts, it is necessary to clamp the metal to be formed in a special way between the upper tool of the press, also called press ram, and the lower tool of the press. For this purpose, die cushion devices are used, by means of which a holding force can be exerted on the press ram during the press stroke of the press ram. The deep-drawn sheet is usually pressed at the edge or partially by a so-called pressure cheek of the die cushion device against the press ram. The pressure cheek usually moves along with the press ram in a uniform manner.
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Ziehkissen-Vorrichtungen, die eine Regelung der Haltekraft erlauben, weisen zumeist einen hydraulischen Antrieb auf. Ein hydraulischer Antrieb ist jedoch relativ aufwendig zu realisieren und eignet sich in der Regel nur für große Pressen bzw. Pressen mit hohen Pressdrücken. Pressen mit hydraulischem Antrieb und hydraulisch angetriebenem Ziehkissen sind zudem sehr groß und daher schwierig zu installieren, und außerdem vergleichsweise teuer.Die-cushion devices that allow control of the holding force, usually have a hydraulic drive. However, a hydraulic drive is relatively expensive to implement and is usually only suitable for large presses or presses with high pressing pressures. In addition, hydraulic drive presses and hydraulically driven die cushions are very large and therefore difficult to install, and also relatively expensive.
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Eine Ziehkissen-Vorrichtung nach dem Oberbegriff des unabhängigen Anspruchs 1 ist aus
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Es ist Aufgabe der vorliegenden Erfindung, bei einer Ziehkissen-Vorrichtung der eingangs genannten Art eine Lösung anzugeben, die eine kompakte Bauweise sowie leichte Integration der Ziehkissen-Vorrichtung in eine Presse zulässt, wobei der Antrieb der Ziehkissen-Vorrichtung zudem günstig zu realisieren und leicht steuerbar sein soll. Zudem soll der Antrieb der Ziehkissen-Vorrichtung eine schnelle Bewegung der Ziehkissen-Druckwange ermöglichen.It is an object of the present invention to provide a solution in a die cushion device of the type mentioned, which allows a compact design and easy integration of the die cushion device in a press, the drive of the die cushion device also to realize low and easy to control should be. In addition, the drive of the die cushion device to allow rapid movement of the die cushion cheek.
Die Aufgabe wird gelöst durch die Merkmale des unabhängigen Anspruchs 1 der vorliegenden Erfindung. Die Erfindung geht aus von einer Ziehkissen-Vorrichtung für eine Presse, zur Regelung einer Haltekraft, die von einer Druckwange auf den Pressenstößel der Presse ausgeübt wird. Neben der Druckwange umfasst die Ziehkissen-Vorrichtung ferner einen Rahmen und ein Keilschubgetriebe, wobei die Haltekraft mittels des Keilschubgetriebes verstellbar ist. Erfindungsgemäß ist das Keilschubgetriebe von zumindest einem Linear-Elektromotor angetrieben, wobei die Haltekraft während eines Pressenhubs durch Steuerung des Linear-Elektromotors regelbar ist.The object is solved by the features of
Die Kombination aus Keilschubgetriebe und Linear-Elektromotor ermöglicht eine schnelle Bewegung der Druckwange der Ziehkissen-Vorrichtung, wodurch die Produktivität einer Presse mit einer erfindungsgemäßen Ziehkissen-Vorrichtung in einem Bereich liegt, der sonst nur mit teuren hydraulischen Antrieben erreicht werden kann. Der Antrieb mit einem Linear-Elektromotor ermöglicht eine leichte Steuerung und ist einfach und kostengünstig zu realisieren. Da Linear-Elektromotoren nur eine begrenzte Kraft aufbringen können, wird die erforderliche Untersetzung mit einem Keilschubgetriebe umgesetzt.The combination of wedge thrust and linear electric motor allows rapid movement of the pressure cheek of the die cushion device, whereby the productivity of a press with a die cushion device according to the invention is in a range that otherwise can only be achieved with expensive hydraulic drives. The drive with a linear electric motor allows easy control and is easy and inexpensive to implement. Since linear electric motors can muster only a limited force, the required reduction is implemented with a wedge slide.
Unter der Druckwange der erfindungsgemäßen Ziehkissen-Vorrichtung soll lediglich ein bewegtes Bauteil verstanden werden, mit Hilfe dessen eine Haltekraft auf den Pressenstößel der Presse ausgeübt werden kann. Dieses Bauteil kann beispielsweise ein Bolzen mit, falls erforderlich, aufgesetztem Werkzeug sein.Under the pressure cheek of the die cushion device according to the invention, only a moving component is to be understood, by means of which a holding force can be exerted on the press ram of the press. This component may for example be a bolt with, if necessary, attached tool.
Vorteilhafte Ausgestaltungen der vorliegenden Erfindung sind Gegenstand der Unteransprüche.Advantageous embodiments of the present invention are the subject of the dependent claims.
In einer besonders bevorzugten Ausführungsform der vorliegenden Erfindung stellt der zumindest eine Linear-Elektromotor die einzige Antriebsart der Ziehkissen-Vorrichtung zur Erzeugung der Haltekraft dar. Der Antrieb baut dann sehr kompakt und lässt sich sehr genau steuern.In a particularly preferred embodiment of the present invention, the at least one linear electric motor is the only drive mode of the die cushion device for generating the holding force. The drive then builds very compact and can be controlled very accurately.
In einer weiteren bevorzugten Ausführungsform der vorliegenden Erfindung umfasst das Keilschubgetriebe einen ersten Keil mit einer ersten Keilfläche und einen zweiten Keil mit einer zweiten Keilfläche, wobei die Druckwange mit dem ersten Keil verbunden ist, der erste Keil in Wirkrichtung der Haltekraft verschieblich im Rahmen gelagert ist, und der zweite Keil entlang einer Verstellrichtung, die zur Wirkrichtung der Haltekraft einen Winkel aufweist, verschieblich im Rahmen gelagert ist. Die erste Keilfläche und die zweite Keilfläche sind dabei einander zugewandt, so dass eine Bewegung des zweiten Keils in Verstellrichtung eine Bewegung des ersten Keils in Wirkrichtung der Haltekraft bewirkt. Bei diesem Aufbau des Keilschubgetriebes kann insbesondere der obere Teil der Ziehkissen-Vorrichtung sehr kompakt gehalten werden, wodurch sich die Ziehkissen-Vorrichtung sehr leicht in den Pressentisch einer Presse integrieren lässt. Im Sinne einer kompakten Bauweise ist es vorteilhaft, wenn lediglich ein einzelnes Keilschubgetriebe mit einem ersten Keil und einem zweiten Keil vorgesehen ist.In a further preferred embodiment of the present invention, the wedge push gear comprises a first wedge with a first wedge surface and a second wedge with a second wedge surface, wherein the pressure cheek is connected to the first wedge, the first wedge is slidably mounted in the frame in the direction of action of the holding force, and the second wedge along an adjustment direction, which has an angle to the effective direction of the holding force, is mounted displaceably in the frame. The first wedge surface and the second wedge surface are facing each other, so that a movement of the second wedge in the adjustment causes a movement of the first wedge in the effective direction of the holding force. In this construction of the wedge thruster, in particular, the upper part of the die cushion apparatus can be kept very compact, whereby the die cushion device can be very easily integrated into the press table of a press. In terms of a compact design, it is advantageous if only a single wedge thrust gear is provided with a first wedge and a second wedge.
Ebenfalls im Sinne einer kompakten Bauweise und guten Integration in den Pressentisch einer Presse ist es, wenn Verstellrichtung und Wirkrichtung aufeinander senkrecht stehen. Gleichzeitig wirkt sich dies günstig auf die Belastung der Keillagerung und die Leichtgängigkeit des Keilschubgetriebes aus.Also in the sense of a compact design and good integration in the press table of a press, it is when adjustment and direction of action are perpendicular to each other. At the same time, this has a favorable effect on the stress of the wedge bearing and the ease of wedge thruster.
Vorteilhafterweise ist die Verstellrichtung horizontal. Dadurch wird für die Unterbringung des oder der Linear-Elektromotoren sehr wenig Platz in vertikaler Richtung benötigt. Auch dies wirkt sich wiederum positiv auf die Integration der Ziehkissen-Vorrichtung in den Pressentisch einer Presse aus.Advantageously, the adjustment direction is horizontal. As a result, very little space in the vertical direction is required for accommodating the linear electric motor or motors. Again, this has a positive effect on the integration of the die cushion device in the press table of a press.
In einer weiteren bevorzugten Ausführungsform der vorliegenden Erfindung umfasst der Linear-Elektromotor einen Stator und einen Läufer, wobei der Stator mit dem Rahmen und der Läufer mit dem zweiten Keil verbunden sind. In der Regel ist der Rahmen der Ziehkissen-Vorrichtung feststehend, das heißt fest mit dem Gehäuse der Presse verbunden. Wenn der Stator des Linear-Elektromotors mit dem Rahmen verbunden ist, gestaltet sich daher auch die Verkabelung des Linear-Elektromotors einfach. Es muss keine flexible Zuleitung vorgesehen werden.In a further preferred embodiment of the present invention, the linear electric motor comprises a stator and a rotor, wherein the stator with the frame and the rotor are connected to the second wedge. In general, the frame of the die cushion device is fixed, that is firmly connected to the housing of the press. Therefore, when the stator of the linear electric motor is connected to the frame, the wiring of the linear electric motor is also easy. There is no need to provide a flexible supply line.
In einer weiteren bevorzugten Ausführungsform der vorliegenden Erfindung ist jeweils zumindest eine Wälzführung zwischen dem zweiten Keil und dem Rahmen, und zwischen erster Keilfläche und zweiter Keilfläche vorgesehen. Prinzipiell sind statt Wälzführungen auch Gleitführungen möglich, jedoch wird mit Wälzführungen die Reibung verringert und die Stabilität und Leichtgängigkeit erhöht.In a further preferred embodiment of the present invention, at least one rolling guide is provided in each case between the second wedge and the frame, and between the first wedge surface and the second wedge surface. In principle, sliding guides are also possible instead of rolling guides, but with rolling guides the friction is reduced and the stability and ease of movement are increased.
Vorteilhafterweise ist auch zwischen dem ersten Keil und dem Rahmen zumindest eine Wälzführung vorgesehen. Auch diese Art der Lagerung bietet gegenüber reinen Führungsflächen bzw. gegenüber Gleitführungen die o.g. Vorteile.Advantageously, at least one rolling guide is provided between the first wedge and the frame. This type of storage offers compared to pure guide surfaces or against sliding guides o.g. Advantages.
In einer weiteren besonders bevorzugten Ausführungsform der vorliegenden Erfindung umfasst die Ziehkissen-Vorrichtung ferner eine Steuerung des Linear-Elektromotors. Dadurch können entweder die Position der Druckwange oder die Haltekraft, die von der Druckwange auf den Pressenstößel der Presse ausgeübt wird, gezielt gesteuert werden.In a further particularly preferred embodiment of the present invention, the die cushion apparatus further comprises a control of the linear electric motor. As a result, either the position of the pressure cheek or the holding force exerted by the pressure cheek on the press ram of the press can be controlled selectively.
Vorteilhafterweise umfasst die Ziehkissen-Vorrichtung dazu ferner ein Wegmesssystem zur Erfassung der Position der Druckwange. Dadurch ist eine wegabhängige Steuerung der Druckwange möglich. Das Wegmesssystem kann beispielsweise durch einen Taktgeber sowie einen Sensor realisiert sein. Es eignen sich sowohl magnetische als auch optische oder induktive Sensoren. Vorteilhafterweise ist der Sensor am Rahmen fixiert, wodurch die Verkabelung des Sensors einfach ist und nicht flexibel gestaltet sein muss. Der Taktgeber, der vom Sensor abgetastet wird, kann an der Druckwange selbst oder auf dem ersten Keil bzw. ggf. auch auf dem zweiten Keil angebracht sein. Im letzten Fall wird die Position der Druckwange über das Untersetzungsverhältnis des Keilschubgetriebes berechnet. Als Sensor bzw. Wegmesssystem kann auch der Linear-Elektromotor selbst als sogenannter integrierter Sensor" verwendet werden.Advantageously, the die cushion device further comprises a path measuring system for detecting the position of the pressure cheek. As a result, a path-dependent control of the pressure cheek is possible. The displacement measuring system can be realized for example by a clock and a sensor. Both magnetic and optical or inductive sensors are suitable. Advantageously, the sensor is fixed to the frame, whereby the wiring of the sensor is simple and does not have to be designed flexibly. The clock, which is scanned by the sensor, may be mounted on the pressure cheek itself or on the first wedge or possibly also on the second wedge. In the latter case, the Position of the pressure cheek calculated using the reduction ratio of the wedge push gear. As a sensor or displacement measuring system and the linear electric motor itself can be used as a so-called integrated sensor.
In einer weiteren bevorzugten Ausführungsform der vorliegenden Erfindung umfasst die Ziehkissen-Vorrichtung ferner einen Drucksensor zur Erfassung der Haltekraft. Ein Drucksensor erlaubt eine kraftabhängige Steuerung der Ziehkissen-Vorrichtung. Dieser Sensor kann in die Druckwange, beispielsweise in einen Bolzen der Druckwange oder in ein aufgesetztes Werkzeug integriert sein.In a further preferred embodiment of the present invention, the die cushion apparatus further comprises a pressure sensor for detecting the holding force. A pressure sensor allows a force-dependent control of the die cushion device. This sensor can be integrated in the pressure cheek, for example in a pin of the pressure cheek or in an attached tool.
Die Erfindung stellt auch eine Presse mit einem Pressentisch, einem Pressenstößel und einer erfindungsgemäßen Ziehkissen-Vorrichtung bereit, bei welcher der Rahmen der Ziehkissen-Vorrichtung in den Pressentisch integriert und mit diesem verbunden ist. Der Rahmen der Ziehkissen-Vorrichtung kann sowohl fest mit dem Pressentisch verbunden als auch, beispielsweise in horizontaler Richtung, verstellbar sein.The invention also provides a press with a press table, a press ram, and a die cushion apparatus according to the invention in which the frame of the die cushion apparatus is integrated with and connected to the press table. The frame of the die cushion device can be both fixedly connected to the press table and, for example, in the horizontal direction, adjustable.
Ein bevorzugtes Ausführungsbeispiel der vorliegenden Erfindung wird im Folgenden anhand von Zeichnungen näher erläutert. Es zeigen:
Figur 1- eine Presse mit einer erfindungsgemäßen Ziehkissen-Vorrichtung,
Figur 2- eine Detailansicht der Ziehkissen-
Vorrichtung aus Figur 1 in einer geschnittenen Vorderansicht, und Figur 3- eine Seitenansicht der erfindungsgemäßen Ziehkissen-
Vorrichtung aus Figur 2 , ebenfalls im Schnitt.
- FIG. 1
- a press with a die-cushion device according to the invention,
- FIG. 2
- a detailed view of the die cushion device
FIG. 1 in a cut front view, and - FIG. 3
- a side view of the die cushion device according to the invention
FIG. 2 , also in section.
Für die folgenden Ausführungen gilt, dass gleiche Teile mit gleichen Bezugszeichen bezeichnet sind.For the following statements applies that the same parts are designated by the same reference numerals.
Der Pressentisch 23 ist teilweise geschnitten dargestellt, so dass die im Pressentisch 23 integrierte Ziehkissen-Vorrichtung 1 sichtbar ist. Der Rahmen 4 der erfindungsgemäßenThe press table 23 is shown partially cut so that the
Ziehkissen-Vorrichtung 1 ist mit dem Pressentisch 23 verbunden. Im Rahmen 4 befindet sich das Keilschubgetriebe 5 der Ziehkissen-Vorrichtung 1, das den Antrieb der aus dem Bolzen 7 und dem Werkzeug 8 bestehenden Druckwange bildet. Der Bolzen 7 kann mit Hilfe des Keilschubgetriebes 5 in vertikaler Richtung verfahren werden und ragt im dargestellten Fall aus der Oberseite des Pressentischs 23 hinaus. Zwischen dem auf den Bolzen 7 aufgesetzten Werkzeug 8 und dem Pressenstößel 3 wird bei einem Tiefziehvorgang ein Blech eingespannt.Cushioning
Die in
An seinem unteren Ende ist der Bolzen 7 mit dem ersten Keil 9 des Keilschubgetriebes 5 fest verbunden. Der erste Keil 9 ist genauso wie der Bolzen 7 in vertikaler Richtung 13 im Rahmen 4 geführt. Dargestellt sind lediglich seitliche Führungsflächen, jedoch können auch Wälzlager oder Gleitlager zwischen dem Rahmen 4 und dem ersten Keil 9 vorgesehen sein. Die Unterseite des ersten Keils 9, im Folgenden erste Keilfläche, liegt in einer schiefen Ebene, die gegenüber der Horizontalen einen Winkel von etwa 5° aufweist. Über diesen Winkel bestimmt sich das Untersetzungsverhältnis des Keilschubgetriebes 5. Dieser Winkel liegt vorzugsweise in einem Bereich zwischen 3° und 8°. Die erste Keilfläche ist mit dem Bezugszeichen 11 bezeichnet.At its lower end, the
Zwischen dem ersten Keil 9 und einer Bodenplatte 26 des Rahmens 4 ist ein zweiter Keil 10 angeordnet, der in der horizontalen Verstellrichtung 14 beweglich im Rahmen 4 gelagert ist. Dazu sind zwischen der horizontal ausgerichteten Unterseite des zweiten Keils 10 und der Bodenplatte 26 des Rahmens 4 zwei Wälzführungen 17 angeordnet. Die Oberseite 12 des zweiten Keils 10, im Folgenden zweite Keilfläche, verläuft parallel zur ersten Keilfläche 11 des ersten Keils 9. Zwischen erster Keilfläche 11 und zweiter Keilfläche 12 sind ebenfalls zwei Wälzführungen 18 angeordnet. Wenn der zweite Keil 10 in Verstellrichtung 14 bewegt wird, bewegen sich der erste Keil 9 und der mit dem ersten Keil 9 verbundene Bolzen 7 in der vertikalen Wirkrichtung 13.Between the
Als Antrieb des zweiten Keils 10 dienen zwei Linear-Elektromotoren 6, die, wie in
In
Alternativ zur wegabhängigen Steuerung erlaubt das System auch eine kraftabhängige Steuerung, wobei dabei die zwischen dem Bolzen 7 und dem Pressenstößel 3 wirkende Kraft gemessen werden muss. Die erfindungsgemäße Ziehkissen-Vorrichtung 1 umfasst hierzu einen Drucksensor 22, der in den Bolzen 7 integriert ist. Die Signale der Sensoren 21 und 22 werden von der Steuerung 19 ausgelesen und ausgewertet.As an alternative to path-dependent control, the system also allows a force-dependent control, in which case the force acting between the
Claims (10)
dadurch gekennzeichnet, dass
das Keilschubgetriebe (5) von zumindest einem Linear-Elektromotor (6) angetrieben ist, wobei die Haltekraft während eines Pressenhubs durch Steuerung des Linear-Elektromotors (6) regelbar ist.A die cushion device (1) for a press (2) for controlling a holding force exerted by a pressure cheek on the press ram (3) of the press (2), the die cushion device (1) further comprising a frame adjacent to the pressure cheek (4) and a wedge thrust gear (5), and wherein the holding force is adjustable by means of the wedge thruster (5),
characterized in that
the wedge thrust gear (5) is driven by at least one linear electric motor (6), the holding force being controllable during a press stroke by controlling the linear electric motor (6).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102010051958A DE102010051958A1 (en) | 2010-11-19 | 2010-11-19 | A die cushion device |
Publications (2)
Publication Number | Publication Date |
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EP2457672A1 true EP2457672A1 (en) | 2012-05-30 |
EP2457672B1 EP2457672B1 (en) | 2015-07-08 |
Family
ID=44862326
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP11008440.7A Not-in-force EP2457672B1 (en) | 2010-11-19 | 2011-10-20 | Die cushion device |
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EP (1) | EP2457672B1 (en) |
DE (1) | DE102010051958A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2017050317A1 (en) * | 2015-09-23 | 2017-03-30 | Schuler Pressen Gmbh | Pressure pin for a press for shaping a workpiece, press for shaping a workpiece, method for incorporating and adjusting a press during a shaping process, method for producing a component, and component |
CN112872536A (en) * | 2021-01-19 | 2021-06-01 | 苏州长光华芯光电技术股份有限公司 | Auxiliary welding device for laser chip |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103212631A (en) * | 2013-04-02 | 2013-07-24 | 顺德工业(江苏)有限公司 | Deformation correction mechanism in stamping die |
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DE2007724A1 (en) | 1970-02-19 | 1971-09-02 | Philips Patentverwaltung GmbH 2000 Hamburg | Spring loaded floor for bending press tool |
EP1082185B1 (en) | 1998-05-12 | 2002-03-27 | Johannes Hülshorst | A deep drawing press with a ram hammer and drawing cushion driven by threaded spindles and spindle nuts |
JP2003211231A (en) | 2002-01-18 | 2003-07-29 | Sanyo Electric Co Ltd | Pressure control mechanism for preventing wrinkle in press forming die |
US7000537B2 (en) | 2001-04-26 | 2006-02-21 | Sodick Co., Ltd. | Press and machine tool |
EP1741500A1 (en) * | 2005-07-05 | 2007-01-10 | Fanuc Ltd | Die cushion mechanism, and device and method for controlling the same |
DE102010004989A1 (en) * | 2009-02-16 | 2010-08-19 | Fanuc Ltd. | Control device for a servo-drawing cushion |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102006034201A1 (en) * | 2006-07-24 | 2008-02-07 | Siemens Ag | Press |
-
2010
- 2010-11-19 DE DE102010051958A patent/DE102010051958A1/en not_active Withdrawn
-
2011
- 2011-10-20 EP EP11008440.7A patent/EP2457672B1/en not_active Not-in-force
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2007724A1 (en) | 1970-02-19 | 1971-09-02 | Philips Patentverwaltung GmbH 2000 Hamburg | Spring loaded floor for bending press tool |
EP1082185B1 (en) | 1998-05-12 | 2002-03-27 | Johannes Hülshorst | A deep drawing press with a ram hammer and drawing cushion driven by threaded spindles and spindle nuts |
US7000537B2 (en) | 2001-04-26 | 2006-02-21 | Sodick Co., Ltd. | Press and machine tool |
JP2003211231A (en) | 2002-01-18 | 2003-07-29 | Sanyo Electric Co Ltd | Pressure control mechanism for preventing wrinkle in press forming die |
EP1741500A1 (en) * | 2005-07-05 | 2007-01-10 | Fanuc Ltd | Die cushion mechanism, and device and method for controlling the same |
DE102010004989A1 (en) * | 2009-02-16 | 2010-08-19 | Fanuc Ltd. | Control device for a servo-drawing cushion |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2017050317A1 (en) * | 2015-09-23 | 2017-03-30 | Schuler Pressen Gmbh | Pressure pin for a press for shaping a workpiece, press for shaping a workpiece, method for incorporating and adjusting a press during a shaping process, method for producing a component, and component |
CN108025345A (en) * | 2015-09-23 | 2018-05-11 | 舒乐绞扭机有限责任公司 | Press-on pins for forcing press that workpiece is retrofited, for workpiece is retrofited forcing press, for the training in remodeling and adjust method, the method and component for manufacturing component of forcing press |
CN108025345B (en) * | 2015-09-23 | 2021-06-18 | 舒乐绞扭机有限责任公司 | Press and pressure pin for modifying a workpiece, method for training and adjusting a press during modification |
CN112872536A (en) * | 2021-01-19 | 2021-06-01 | 苏州长光华芯光电技术股份有限公司 | Auxiliary welding device for laser chip |
CN112872536B (en) * | 2021-01-19 | 2023-01-24 | 苏州长光华芯光电技术股份有限公司 | Auxiliary welding device for laser chip |
Also Published As
Publication number | Publication date |
---|---|
EP2457672B1 (en) | 2015-07-08 |
DE102010051958A1 (en) | 2012-05-24 |
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