EP2823908A1 - Forming tool with a feeding device - Google Patents
Forming tool with a feeding device Download PDFInfo
- Publication number
- EP2823908A1 EP2823908A1 EP13003463.0A EP13003463A EP2823908A1 EP 2823908 A1 EP2823908 A1 EP 2823908A1 EP 13003463 A EP13003463 A EP 13003463A EP 2823908 A1 EP2823908 A1 EP 2823908A1
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- European Patent Office
- Prior art keywords
- feed
- mold half
- tool
- nose
- held
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- 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.)
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Classifications
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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
- B21D43/00—Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
- B21D43/02—Advancing work in relation to the stroke of the die or tool
- B21D43/04—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work
- B21D43/06—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work by positive or negative engaging parts co-operating with corresponding parts of the sheet or the like to be processed, e.g. carrier bolts or grooved section in the carriers
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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
- B21D43/00—Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
- B21D43/02—Advancing work in relation to the stroke of the die or tool
- B21D43/04—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work
- B21D43/10—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work by grippers
- B21D43/11—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work by grippers for feeding sheet or strip material
Definitions
- the invention relates to a tool with a feed device according to the preamble of claim 1 and a production system consisting of a press and such a tool according to claim 10.
- Such tools have long been known in the art and are used to produce stamped and / or bent parts in large quantities. Particularly in the electrical industry, such tools play a very important role in the production of contact elements of all kinds.
- Such a tool always consists of a stationary first mold half and a relative to this first mold half oscillating drivable second mold half.
- the first mold half is usually the lower mold half and the second mold half the upper mold half.
- Such a tool has at least two characteristic directions, namely the direction of the oscillating movement (stroke direction, usually the Z direction) and the feed direction in which the finished parts move through the tool, during which they move on a transport strip stay put.
- This feed direction is usually perpendicular to the stroke direction and can be referred to, for example, as the X direction.
- At least one of the two rollers is driven by a servomotor, which is synchronized electronically with the press which drives the second mold half.
- a transport strip which is usually perforated.
- This case can occur, for example, when the tool is used to produce two-part elements, for example two-part contact elements, in particular crimping elements.
- the tool has two mutually opposite, so antiparallel oriented transport directions and a mounting station on which the two-part elements are mounted from two separate parts on.
- a separate feed device is provided for each transport direction.
- the feed device is positively controlled by the lifting movement of the press.
- the feed device has a block which can perform an oscillating movement parallel to the feed direction.
- To implement the oscillating stroke movement of the press in this oscillating motion is a wedge gear, which deflects the oscillating stroke of the press by 90 °.
- the block carries a pivoting member with a nose which, upon movement of the block in the feed direction, engages a hole of the transporting strip and thus pushes the transporting strip forward. In a movement opposite to the feed direction, this nose slips out of this hole due to an inclined surface, so that this movement is not on the Transport strip is transmitted.
- the feed can be done either only when you open the end or only when closing tool.
- a disadvantage of this design principle is that the feed length per stroke can be as large as the maximum lifting height of the press.
- the above-mentioned tools for producing two-part contact elements so that they have two assembly stations, where first and second items are joined together.
- this requires correspondingly large feed lengths, which make correspondingly large lifting heights necessary.
- large lifting heights are problematic for mechanical reasons and usually necessitate a reduction of the clock frequency.
- reducing the clock frequency is contrary to the goal of increasing productivity.
- the second type of feed device for this purpose is essentially the same as the feed devices described above, namely, they have an opposite pair of rollers between which the transport strip runs. Again, at least one roller is driven by a servomotor, which is synchronized with the press.
- a servomotor which is synchronized with the press.
- the power transmission takes place exclusively via frictional forces. If you want to achieve a large feed, then large accelerations are necessary. However, these can only be achieved with correspondingly high clamping forces.
- excessive clamping forces may, especially in connection with high accelerations, lead to a deformation of the transport strip, but this must be avoided under all circumstances.
- the achievable at high cycle speeds feed length is limited even with this type of feed devices.
- the present invention has the object to provide a tool with which a large feed lengths can be achieved at the same time with high numbers of cycles.
- a production plant consisting of a press and such a tool is specified in claim 10.
- the two principles described above are combined with each other, wherein the actual feed mechanism is formed as in the first design principle described above, for their drive, however, an electric motor, in particular a servomotor, is used.
- the coupling takes place via a connecting rod.
- This nose is part of a feed element, which is connected via a connecting rod with the drive shaft of the electric motor.
- the feed force is introduced exclusively via the nose in the transport strip, wherein the nose is in this case in a hole of the feed strip.
- the nose preferably has a sloping rear side so that it slips out of the hole of the transport strip against the feed direction "on its own” upon retraction of the advancing element and thus comes out of engagement with the transport strip.
- the feed element is preferably constructed in at least two parts, wherein the element which is directly connected to the connecting rod, can perform only an oscillating movement parallel to the feed direction.
- At least one pivoting element, which carries the nose is movably held on this oscillating element.
- this pivoting element is held pivotably about an axis on the oscillation element.
- the oscillating element can carry at least two pivot elements, whereby load on each individual nose is reduced.
- the drive axle of the electric motor performs an oscillating movement, whereby it can be avoided in particular that the connecting rod must be designed as a crank gear.
- FIG. 1 is very schematic and of little detail, describes a tool which serves to produce contact elements assembled from two individual elements. Such a tool is an important application of the present invention, but not the only one possible.
- the first mold half 10 is the stationary, lower mold half, while the second mold half is drivable by means of a press (not shown), so that it performs an oscillating stroke movement in the Z direction.
- the tool has two transport paths 12, 14 extending in the X direction, which are shown schematically as wide grooves in the first tool half 10. These two transport paths 12, 14 are connected to a mantle station by means of a cross connection 16, which is also shown schematically as a groove here. This groove extends in the Y direction, ie perpendicular to the direction of the transport paths and perpendicular to the direction of the lifting movement.
- a slider 17 is arranged, which is part of a transverse thrust device.
- the tool is supplied at the first end 12a of the first transport path, a metal strip and from this metal strip first items are formed on the way to the assembly station.
- a feed device which promotes the items in a first transport direction, namely the X direction, can serve a conventional feed device with two counter-rotating rollers, as already explained above.
- preformed individual parts are fed to the tool at the first end 14a of the second transport path 14, which are connected to a perforated transport strip.
- These preformed individual parts are conveyed by means of a feed device according to the invention in a second transport direction, namely in the -X direction, the assembly station, where they are joined together with the first items.
- the feed is synchronized in each case with the lifting movement of the second mold half, namely with the tool open.
- feed device is the feed device for the punched transport strip
- transport direction is the transport direction of the glovier transport strip (and the preformed items), ie in FIG. 1 the -X direction:
- the FIG. 2 shows the feed device 20 for the second transport path 14. This is used to supply already preformed items 40 which are held on a perforated Transportstreifien 42, the tool and transported in this, so that they can get to the assembly station.
- the feed device 20, which is a part of the first mold half, that is connected directly to an adjacent element of the first mold half, has a servo motor 22, the drive axis 23 extends parallel to the stroke direction, ie in the Z direction. With this drive shaft 23 a pivot lever 24 is rotatably connected. A first end of a connecting rod 26 is connected to this pivot lever 24 and extends substantially parallel to the feed directions, namely in the -X direction. The second end of this connecting rod 26 is connected to a block 32 of a feed element 30.
- the two axes of the connecting rod 26 extend in the Z direction.
- the block 32 serves as an oscillating element and is held on the first mold half 10 such that it exclusively in parallel to the X direction in an oscillatory motion is movable.
- the block 32 carries two pivot elements 34, 34 '. These are each connected via an axis 37, 37 'to the block 32, so that the pivot elements are coupled with respect to the oscillation movement with the block 32.
- the axes 37, 37 ' are each located at a rear end of the pivot elements 34, 34' and extend in the Y direction, ie perpendicular to the stroke direction and perpendicular to the feed direction.
- each pivoting element 34, 34 ' can perform a pivotal movement which is substantially parallel to the stroke direction.
- a compression spring 38, 38' is provided at the front upper end of each pivoting element 34, 34 '.
- the end of this compression spring 38, 38 'facing away from the pivoting element is respectively connected to the block 32, so that the compression spring 38, 38' presses the front end of the respective pivoting element 34, 34 'in -Z direction in the direction of the transporting strip 42.
- a nose for engagement in a hole of the transport strip 42 is provided. Shown in the Figures 5 and 6 as well as in the detail view of the FIG. 4 the nose 36 of the first pivot member 34.
- the front surface that is, the surface facing the transport direction, has the shape of the surface of a half-cylinder having a diameter slightly smaller than the diameter of the holes 42a of the transporting strip 42.
- the axes of the half cylinders each extend in the Z direction (stroke direction).
- the back of the noses each extends obliquely so that it rises in the Z direction opposite to the transport direction.
- first working position (rear working position) is the pivot lever at its rear dead center:
- the two lugs 36 are each engaged in a hole of the transport strip 42 and are held by their compression springs 38, 38 'there.
- the drive shaft 23 of the servomotor 22 is rotated by a certain angle, whereby the connecting rod 26 of the block 32 and thus the associated pivoting elements 34, 34 'are moved in the transport direction until the state FIG. 3 is reached (front working position, front dead center).
- the tool closes, leaving the transport strip 42 is held with the tool closed by not shown holding elements between the two mold halves.
- the servomotor 42 rotates the drive shaft 23 in the opposite direction by the same angle, so that via the connecting rod 26, the block 32 and thus also the pivoting elements 34, 34 'held on it are withdrawn.
- the lugs slide out of their respective hole 42a due to their bevelled backs 36b and, at the end of this backward movement, come into engagement with the respectively next hole in which they are pressed due to their respective compression spring.
- the feed can take place over a very long period of time within one cycle, namely during the entire time in which the transport strip is not held by the tool, ie in particular during the opening and closing tool. This is only possible with the necessary precision because the feed element 30 is connected to the servomotor 22 via a connecting-rod gear.
- FIGS. 7 to 9 show schematically a from a press 60 and a recorded in this press 60 tool existing production facility.
- the tool is in this case constructed as described above, wherein the first mold half 10 is connected to a stationary, lower press plate 62 and the second mold half with a movable, upper press plate 61.
- Upper and lower press plate are connected to each other by means of a frame 63.
- an electric motor 64 is provided to drive the upper press plate 61. In operation, this electric motor rotates at a constant speed and puts the upper press plate 61 (and with it the second mold half 50) by means of an eccentric 65 in an oscillating motion.
- the electric motor 64 of the press is controlled by a controller 66 of the press 60, wherein a signal return is usually provided as well.
- This signal return provides the controller with data that is directly related to the position of the upper press plate so that the controller "knows" the position of the upper press plate at all times.
- the servo motor 22 of the feed device 20 is directly or - as shown - driven indirectly via an intermediate controller 68 from the control of the press, so that the servo motor (And thus the feed device as a whole) is synchronized by the control unit 68 with the press.
- the servo motor performs a clocked, reciprocating motion.
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Abstract
Es wird ein Werkzeug mit einer ersten Werkzeughälfte und einer gegenüber der ersten Werkzeughälfte in einer Hubrichtung bewegbaren zweiten Werkzeughälfte, wobei die zweite Werkzeughälfte gegen die erste Werkzeughälfte mittels einer Presse in einer oszillierenden Hubbewegung antreibbar ist, beschrieben. An der ersten Werkzeughälfte ist eine Vorschubeinrichtung (20) gehalten, welche vorgeformte Einzelteile (40), welche an einem gelochten Transportstreifen (42) gehalten sind, in einer senkrecht zur Hubrichtung stehenden Vorschubrichtung getaktet dem Werkzeug zuführt und in diesem weitertransportiert. Hierbei weist die Vorschubeinrichtung (20) einen Elektromotor mit einer Antriebsachse (23) auf- Um ein große Vorschublängen bei gleichzeitig hohen Taktzahlen erreichen zu können, ist die Antriebsachse (23) über ein Pleuel-Getriebe mit einem an der ersten Werkzeughälfte gehaltenen Vorschubelement (30) verbunden, welches durch das Pleuel-Getriebe in eine oszillierende Bewegung in Vorschubrichtung und zurück versetzbar ist. Das Vorschubelement weist eine sich quer zur Vorschubrichtung erstreckende Nase zum Eingriff in ein Loch des Transportstreifens (42) auf, wobei zumindest der Abschnitt des Vorschubelements, von welchem sich die Nase erstreckt, gegen die Kraft wenigstens eines parallel zur Erstreckungsrichtung der Nase wirksamen Rückstellelements bezüglich der ersten Werkzeughälfte beweglich ist (Fig. 2).It is a tool having a first mold half and a relative to the first mold half in a stroke direction movable second mold half, wherein the second mold half is driven against the first mold half by means of a press in an oscillating stroke. On the first mold half a feed device (20) is held, which preformed items (40) which are held on a perforated transport strip (42) clocked in a direction perpendicular to the stroke feed direction feeds the tool and further transported in this. In this case, the feed device (20) has an electric motor with a drive axle (23). In order to be able to achieve a large feed length with simultaneously high cycle speeds, the drive axle (23) is connected via a connecting rod transmission with a feed element (30) held on the first tool half ), which is displaceable by the connecting rod transmission in an oscillating movement in the feed direction and back. The advancing element has a nose extending transversely to the advancing direction for engagement in a hole of the transporting strip (42), wherein at least the portion of the advancing element from which the nose extends opposes the force of at least one return element parallel to the extending direction of the nose first mold half is movable (Fig. 2).
Description
Die Erfindung betrifft ein Werkzeug mit einer Vorschubeinrichtung nach dem Oberbegriff des Anspruchs 1 sowie eine Produktionsanlage bestehend aus einer Presse und einem solchen Werkzeug nach Anspruch 10.The invention relates to a tool with a feed device according to the preamble of claim 1 and a production system consisting of a press and such a tool according to
Gattungsgemäße Werkzeuge sind in der Technik seit langem bekannt und dienen der Herstellung von Stanz- und/oder Biegeteilen in großen Stückzahlen. Insbesondere in der Elektroindustrie spielen derartige Werkzeuge bei der Herstellung von Kontaktelementen aller Art eine sehr große Rolle. Ein solches Werkzeug besteht stets aus einer stationären ersten Werkzeughälfte und einer gegenüber dieser ersten Werkzeughälfte oszillierend antreibbaren zweiten Werkzeughälfte. Hierbei ist die erste Werkzeughälfte in der Regel die untere Werkzeughälfte und die zweite Werkzeughälfte die obere Werkzeughälfte.Generic tools have long been known in the art and are used to produce stamped and / or bent parts in large quantities. Particularly in the electrical industry, such tools play a very important role in the production of contact elements of all kinds. Such a tool always consists of a stationary first mold half and a relative to this first mold half oscillating drivable second mold half. Here, the first mold half is usually the lower mold half and the second mold half the upper mold half.
Ein solches Werkzeug hat wenigstens zwei charakteristische Richtungen, nämlich die Richtung der oszillierenden Bewegung (Hubrichtung, in der Regel die Z-Richtung) sowie die Vorschubrichtung, in der sich die zu fertigen Teile durch das Werkzeug bewegen, wobei sie während dieser Vorschubbewegung an einem Transportstreifen gehalten bleiben. Diese Vorschubrichtung ist in der Regel senkrecht zur Hubrichtung und kann beispielsweise als X-Richtung bezeichnet werden. Es ist eine Vorschubeinrichtung vorhanden, welche die Teile, welche mit einem Transportstreifen verbunden bleiben, durch das Werkzeug in Transportrichtung fördert. Häufig wird dem Werkzeug ein noch ein unbearbeitetes Metallband zugeführt; in diesem Fall ist diese Vorschubeinrichtung in der Regel als ein Paar gegenläufiger Walzen ausgebildet, zwischen denen das unbearbeitete Metallband läuft. Hierbei ist zumindest eine der beiden Walzen von einem Servomotor angetrieben, welcher elektronisch mit der Presse, welche die zweite Werkzeughälfte antreibt, synchronisiert ist. Nach Abschluss eines Vorschub-Taktes und bevor das Werkzeug vollständig geschlossen ist, wird der Abstand zwischen den beiden Walzen vergrößert, um Spannungen im Band zu vermeiden (sogenanntes "Atmen"). Die Kraftübertragung zwischen den Walzen und dem Metallband erfolgt ausschließlich über Reibungskräfte.Such a tool has at least two characteristic directions, namely the direction of the oscillating movement (stroke direction, usually the Z direction) and the feed direction in which the finished parts move through the tool, during which they move on a transport strip stay put. This feed direction is usually perpendicular to the stroke direction and can be referred to, for example, as the X direction. There is a feed device which conveys the parts which remain connected to a transport strip through the tool in the transport direction. Often the tool is fed with an unprocessed metal strip; In this case, this feeding device is usually formed as a pair of counter-rotating rollers, between which the unprocessed metal strip runs. In this case, at least one of the two rollers is driven by a servomotor, which is synchronized electronically with the press which drives the second mold half. After completion of a feed stroke and before the tool is fully closed, the distance between the two rollers is increased to avoid stresses in the belt (so-called "breathing"). The power transmission between the rollers and the metal strip takes place exclusively via frictional forces.
Es gibt auch Werkzeuge, denen bereits vorgeformte Einzelteile zugeführt werden, wobei auch die vorgeformten Einzelteile an einem Transportstreifen gehalten sind, welcher in der Regel gelocht ist. Dieser Fall kann beispielsweise dann auftreten, wenn das Werkzeug dazu dient, zweiteilige Elemente, beispielsweise zweiteilige Kontaktelemente, insbesondere Crimpelemente, herzustellen. In diesem Fall weist das Werkzeug zwei zueinander gegenläufige, also antiparallel orientierte Transportrichtungen und eine Montagestation, an der die zweiteiligen Elemente aus zwei Einzelteilen montiert werden, auf. Hierbei ist für jede Transportrichtung eine separate Vorschubeinrichtung vorgesehen.There are also tools to which pre-formed items are supplied, with the preformed items are held on a transport strip, which is usually perforated. This case can occur, for example, when the tool is used to produce two-part elements, for example two-part contact elements, in particular crimping elements. In this case, the tool has two mutually opposite, so antiparallel oriented transport directions and a mounting station on which the two-part elements are mounted from two separate parts on. Here, a separate feed device is provided for each transport direction.
Für den Vorschub der vorgeformten Einzelteile steht in diesem Fall nur der relativ dünne Transportstreifen zur Verfügung. Bisher werden für diesen Einsatzzweck zwei Arten von Vorschubeinrichtungen eingesetzt, welche vollständig unterschiedliche Funktionsweisen haben:For the advance of the preformed items is in this case only the relatively thin transport strip available. So far, two types of feed devices are used for this purpose, which have completely different modes of operation:
Bei einem ersten Konstruktionsprinzip einer Vorschubeinrichtung für diesen Zweck ist die Vorschubeinrichtung durch die Hubbewegung der Presse zwangsgesteuert. Die Vorschubeinrichtung weist einen Block auf, welcher eine oszillierende Bewegung parallel zur Vorschubrichtung durchführen kann. Zur Umsetzung der oszillierenden Hubbewegung der Presse in diese oszillierende Bewegung dient ein Keilgetriebe, welches die oszillierende Hubbewegung der Presse um 90° umlenkt. Der Block trägt ein Schwenkelement mit einer Nase, welche bei einer Bewegung des Blocks in Vorschubrichtung in Eingriff mit einem Loch des Transportstreifens kommt und so den Transportstreifen vorwärts schiebt. Bei einer Bewegung entgegengesetzt der Vorschubrichtung rutscht diese Nase aufgrund einer Schrägfläche aus diesem Loch heraus, so dass diese Bewegung nicht auf den Transportstreifen übertragen wird. Der Vorschub kann hierbei entweder nur bei sich öffnenddem oder nur bei sich schließendem Werkzeug erfolgen.In a first design principle of a feed device for this purpose, the feed device is positively controlled by the lifting movement of the press. The feed device has a block which can perform an oscillating movement parallel to the feed direction. To implement the oscillating stroke movement of the press in this oscillating motion is a wedge gear, which deflects the oscillating stroke of the press by 90 °. The block carries a pivoting member with a nose which, upon movement of the block in the feed direction, engages a hole of the transporting strip and thus pushes the transporting strip forward. In a movement opposite to the feed direction, this nose slips out of this hole due to an inclined surface, so that this movement is not on the Transport strip is transmitted. The feed can be done either only when you open the end or only when closing tool.
Nachteilig an diesem Konstruktionsprinzip ist, dass die Vorschublänge pro Takt maximal so groß sein kann wie die Hubhöhe der Presse. Zur Erhöhung der Produktivität besteht jedoch vielfach der Wunsch, die oben erwähnten Werkzeuge zur Herstellung von zweiteiligen Kontaktelementen so auszugestalten, dass sie zwei Montagestationen, an denen erste und zweite Einzelteile zusammengefügt werden, aufweisen. Dies erfordert natürlich entsprechend große Vorschublängen, welche entsprechend große Hubhöhen notwendig machen. Große Hubhöhen sind jedoch aus mechanischen Gründen problematisch und machen zumeist eine Reduzierung der Taktfrequenz notwendig. Eine Reduzierung der Taktfrequenz steht natürlich im Gegensatz zu dem Ziel, die Produktivität zu erhöhen.A disadvantage of this design principle is that the feed length per stroke can be as large as the maximum lifting height of the press. In order to increase the productivity, however, there is often the desire to design the above-mentioned tools for producing two-part contact elements so that they have two assembly stations, where first and second items are joined together. Of course, this requires correspondingly large feed lengths, which make correspondingly large lifting heights necessary. However, large lifting heights are problematic for mechanical reasons and usually necessitate a reduction of the clock frequency. Of course, reducing the clock frequency is contrary to the goal of increasing productivity.
Die zweite Art von Vorschubeinrichtungen für diesen Zweck ist im wesentlichen genauso aufgebaut wie die weiter oben beschriebenen Vorschubeinrichtungen, sie weisen nämlich ein gegenläufiges Walzenpaar auf, zwischen denen der Transportstreifen läuft. Auch hier ist zumindest eine Walze durch einen Servomotor angetrieben, welcher mit der Presse synchronisiert ist. Hier gibt es keinen Zusammenhang zwischen der Amplitude der Hubbewegung und der maximalen Vorschublänge und der Vorschub kann sowohl bei sich öffnendem als auch bei sich schließendem Werkzeug erfolgen. Dennoch können auch hier keine beliebig großen Vorschublängen realisiert werden. Dies liegt insbesondere darin begründet, dass die Kraftübertragung ausschließlich über Reibungskräfte erfolgt. Möchte man einen großen Vorschub erreichen, so sind große Beschleunigungen notwendig. Diese können jedoch nur mit entsprechend hohen Klemmkräften erreicht werden. Zu hohe Klemmkräfte können jedoch, insbesondere im Zusammenhang mit hohen Beschleunigungen, zu einer Deformation des Transportstreifens führen, was jedoch unter allen Umständen vermieden werden muss. Somit ist die bei hohen Taktzahlen erreichbare Vorschublänge auch bei dieser Art von Vorschubeinrichtungen limitiert.The second type of feed device for this purpose is essentially the same as the feed devices described above, namely, they have an opposite pair of rollers between which the transport strip runs. Again, at least one roller is driven by a servomotor, which is synchronized with the press. Here there is no connection between the amplitude of the lifting movement and the maximum feed length and the feed can take place both with the tool opening and closing. Nevertheless, even here no arbitrarily long feed lengths can be realized. This is due, in particular, to the fact that the power transmission takes place exclusively via frictional forces. If you want to achieve a large feed, then large accelerations are necessary. However, these can only be achieved with correspondingly high clamping forces. However, excessive clamping forces may, especially in connection with high accelerations, lead to a deformation of the transport strip, but this must be avoided under all circumstances. Thus, the achievable at high cycle speeds feed length is limited even with this type of feed devices.
Hiervon ausgehend stellt sich die vorliegende Erfindung die Aufgabe, ein Werkzeug zur Verfügung zu stellen, mit dem ein große Vorschublängen bei gleichzeitig hohen Taktzahlen erreicht werden können.On this basis, the present invention has the object to provide a tool with which a large feed lengths can be achieved at the same time with high numbers of cycles.
Diese Aufgabe wird durch ein Werkzeug mit den Merkmalen des Anspruchs 1 gelöst.This object is achieved by a tool having the features of claim 1.
Eine Produktionsanlage bestehend aus einer Presse und einem solchen Werkzeug ist in Anspruch 10 angegeben.A production plant consisting of a press and such a tool is specified in
Erfindungsgemäß werden die beiden oben beschriebenen Prinzipien miteinander kombiniert, wobei die eigentliche Vorschubmechanik wie beim oben beschriebenen ersten Konstruktionsprinzip ausgebildet ist, für deren Antrieb jedoch ein Elektromotor, insbesondere ein Servomotor, eingesetzt wird. Die Kopplung erfolgt über ein Pleuelgetriebe. Das heißt, dass für die Vorschubbewegung die Rotationsbewegung eines Elektromotors ursächlich ist, der Transportstreifen jedoch nicht über eine Rotationsbewegung angetrieben wird, sondern über eine Nase, welche eine oszillierende Bewegung parallel zur Vorschubrichtung durchführt und welche bei einer Bewegung in Vorschubrichtung in Eingriff mit einem Loch des gelochten Transportstreifens kommt und bei einer Bewegung in der entgegenge-setzten Richtung nicht in Eingriff mit einem solchen Loch steht. Diese Nase ist ein Teil eines Vorschubelementes, welches über ein Pleuelgetriebe mit der Antriebswelle des Elektromotores verbunden ist. Die Vorschubkraft wird ausschließlich über die Nase in den Transportstreifen eingeleitet, wobei die Nase sich hierbei in einem Loch des Vorschubstreifens befindet.According to the invention, the two principles described above are combined with each other, wherein the actual feed mechanism is formed as in the first design principle described above, for their drive, however, an electric motor, in particular a servomotor, is used. The coupling takes place via a connecting rod. This means that for the advancing movement, the rotational movement of an electric motor is the cause, but the transport strip is not driven by a rotational movement, but via a nose which performs an oscillating movement parallel to the feed direction and which in a movement in the feed direction into engagement with a hole of the perforated transport strip and is not in engagement with such a hole in a movement in the opposite direction. This nose is part of a feed element, which is connected via a connecting rod with the drive shaft of the electric motor. The feed force is introduced exclusively via the nose in the transport strip, wherein the nose is in this case in a hole of the feed strip.
Somit erreicht man einen von der Hubbewegung unabhängigen, klemmkraftfreien, schlupffreien Vorschub, der sowohl bei sich öffnendem Werkzeug als auch bei sich schließendem Werkzeug arbeiten kann. Dies ermöglicht gegenüber dem bisherigen Stand der Technik deutlich größere Vorschubwege pro Takt, wobei der Vorschub sowohl während des Öffnens als auch während des Schließens des Werkzeugs erfolgen kann.Thus, one achieves an independent of the lifting movement, clamping force-free, slip-free feed, which can work both when opening tool and closing tool. This allows compared to the prior art significantly larger feed paths per clock, the feed can be done both during opening and during closing of the tool.
Gemäß Anspruch 2 weist die Nase vorzugsweise eine schräg verlaufende Rück-seite auf, so dass sie beim Zurückziehen des Vorschubelementes entgegen der Vorschubrichtung "von allein" aus dem Loch des Transportstreifens herausrutscht und somit außer Eingriff mit dem Transportstreifen kommt.According to claim 2, the nose preferably has a sloping rear side so that it slips out of the hole of the transport strip against the feed direction "on its own" upon retraction of the advancing element and thus comes out of engagement with the transport strip.
Gemäß den Ansprüchen 3 und 4 ist das Vorschubelement vorzugsweise wenigstens zweiteilig aufgebaut, wobei das Element, welches unmittelbar mit dem Pleuel verbunden ist, ausschließlich eine Oszilliationsbewegung parallel zur Vorschubrichtung ausführen kann. An diesem Oszillationselement ist wenigstens ein Schwenkelement, welches die Nase trägt, beweglich gehalten. Vorzugsweise ist dieses Schwenkelement um eine Achse schwenkbar am Oszillationselement gehalten. Hierdurch werden die beiden notwendigen Bewegungen der Nase voneinander entkoppelt, was die Konstruktion wesentlich vereinfacht.According to
Gemäß Anspruch 5 kann das Oszillationselement wenigstens zwei Schwenkelemente tragen, wodurch Belastung jeder einzelnen Nase reduziert wird.According to claim 5, the oscillating element can carry at least two pivot elements, whereby load on each individual nose is reduced.
Weiter vorzugweise führt die Antriebsachse des Elektromotors eine oszillierende Bewegung durch, wodurch es insbesondere vermieden werden kann, dass das Pleuelgetriebe als Kurbelgetriebe ausgeführt werden muss.Further preferably, the drive axle of the electric motor performs an oscillating movement, whereby it can be avoided in particular that the connecting rod must be designed as a crank gear.
Die Erfindung wird nun anhand von Ausführungsbeispielen mit Bezug auf die Figuren näher erläutert. Hierbei zeigen:
- Figur 1
- eine stark schematisierte Darstellung eine Werkzeuges,
- Figur 2
- eine detaillierte Darstellung einer Vorschubeinrichtung und vorgeformte Einzelteile, welche an einem gelochten Transportstreifen gehalten sind in einer ersten Stellung der Vorschubeinrichtung,
- Figur 3
- das in
Figur 2 Gezeigte in einer zweiten Stellung der Vorschubein-richtung, Figur 4- das in
Figur 3 Gezeigte mit einer Detailansicht, - Figur 5
- das Schwenkelement und den Transportstreifen mit vorgeformten Einzelteilen aus
in einer weiteren Ansicht,Figur 4 - Figur 6
- das in
Figur 5 Gezeigte in einer weiteren Ansicht, - Figur 7
- eine aus einer Presse und einem in dieser Presse aufgenommenen Werkzeug bestehende Produktionsanlage, wobei sich die zweite Werkzeughälfte in ihrem oberen Totpunkt befindet,
- Figur 8
- das in
Figur 7 Gezeigte, wobei sich die zweite Werkzeughälfte in ihrem unteren Totpunkt befindet und - Figur 9
- das in
Figur 8 Gezeigte bei sich öffnendem Werkzeug.
- FIG. 1
- a highly schematized representation of a tool,
- FIG. 2
- a detailed representation of a feed device and preformed items which are held on a perforated transport strip in a first position of the feed device,
- FIG. 3
- this in
FIG. 2 Shown in a second position of the feed device, - FIG. 4
- this in
FIG. 3 Shown with a detail view, - FIG. 5
- the pivoting element and the transport strip with preformed items from
FIG. 4 in another view, - FIG. 6
- this in
FIG. 5 Shown in another view, - FIG. 7
- a production plant consisting of a press and a tool incorporated in this press, with the second mold half in its top dead center,
- FIG. 8
- this in
FIG. 7 Shown, with the second tool half is in its bottom dead center and - FIG. 9
- this in
FIG. 8 Shown by opening tool.
Um die Erfindung besser verstehen zu können, wird zunächst mit Bezug auf die
Man sieht die erste Werkzeughälfte 10 und die zweite Werkzeughälfte 50. Die erste Werkzeughälfte 10 ist hierbei die stationäre, untere Werkzeughälfte, während die zweite Werkzeughälfte mittels einer Presse (nicht dargestellt) antreibbar ist, so dass sie in Z-Richtung eine oszillierende Hubbewegung durchführt. Das Werkzeug weist zwei sich in X-Richtung erstreckende Transportwege 12, 14 auf, welche schematisch als breite Nuten in der ersten Werkzeughälfte 10 dargestellt sind. Diese beiden Transportwege 12, 14 sind an einer Mantagestation mittels einer Querverbindung 16 verbunden, welche auch hier schematisch als Nut dargestellt ist. Diese Nut erstreckt sich in Y-Richtung, also senkrecht zur Richtung der Transportwege und senkrecht zur Richtung der Hubbewegung. In der Querverbindung 16 ist ein Schieber 17 angeordnet, welcher Teil einer Querschubeinrichtung ist.The
Dem Werkzeug wird am ersten Ende 12a des ersten Transportweges ein Metallband zugeführt und aus diesem Metallband werden auf dem Weg zur Montagestation erste Einzelteile geformt. Als Vorschubeinrichtung, welche die Einzelteile in einer ersten Transportrichtung, nämlich der X-Richtung, fördert, kann eine gewöhnliche Vorschubeinrichtung mit zwei gegenläufigen Walzen dienen, wie dies oben bereits erläutert wurde.The tool is supplied at the
Weiterhin werden dem Werkeug am ersten Ende 14a des zweiten Transportweges 14 vorgeformte Einzelteile zugeführt, welche mit einem gelochten Transportstreifen verbunden sind. Diese vorgeformten Einzelteile werden mittels einer erfindungsgemäßen Vorschubeinrichtung in einer zweiten Transportrichtung, nämlich in -X-Richtung, der Montagestation zugefördert, wo sie mit den ersten Einzelteilen zusammengefügt werden.Furthermore, preformed individual parts are fed to the tool at the
Der Vorschub erfolgt jeweils mit der Hubbewegung der zweiten Werkzeughälfte synchronisiert, nämlich bei geöffnetem Werkzeug.The feed is synchronized in each case with the lifting movement of the second mold half, namely with the tool open.
Da sich die vorliegende Erfindung ausschließlich mit der Vorschubeinrichtung, welche den gelochten Transportstreifen (und damit die vorgeformten Einzelteile) vorschiebt, beschäftigt, wird im folgenden ausschließlich diese beschrieben. Hierbei gilt, sofern nichts anderes gesagt ist: "Vorschubeinrichtung" ist die Vorschubeinrichtung für den gelochen Transportstreifen, "Transportrichtung" ist die Transportrichtung des glochten Transportstreifens (und der vorgeformten Einzelteile), also in
Die
Die Funktionsweise der Vorschubeinrichtung ist wie folgt: In der in
Die
Der Elektromotor 64 der Presse wird von einer Steuerung 66 der Presse 60 angesteuert, wobei in der Regel auch eine Signalrückleitung vorgesehen ist. Diese Signalrückleitung versorgt die Steuerung mit Daten, welche in unmittelbarem Bezug zur Position der oberen Pressenplatte stehen, so dass die Steuerung die Position der oberen Pressenplatte zu jeder zeit "kennt". Der Servomotor 22 der Vorschubeinrichtung 20 wird direkt oder - wie gezeigt - indirekt über ein zwischengeschaltetes Steuergerät 68 von der Steuerung der Presse angesteuert, so dass der Servomotor (und damit die Vorschubeinrichtung insgesamt) vom Steuergerät 68 mit der Presse synchronisiert wird. Der Servomotor führt eine getaktete, hin- und hergehende Bewegung aus.The
- 1010
- erste Werkzeughälftefirst tool half
- 1212
- erster Transportwegfirst transport route
- 12a12a
- erstes Endefirst end
- 1414
- zweiter Transportwegsecond transport route
- 14a14a
- erstes Endefirst end
- 1616
- Querverbindungcross connection
- 1717
- Schieberpusher
- 2020
- Vorschubeinrichtungfeeder
- 2222
- Servomotorservomotor
- 2323
- Antriebsachsedrive axle
- 2424
- Schwenkelementpivoting element
- 2626
- Pleuelpleuel
- 3030
- Vorschubelementfeed element
- 3232
- Blockblock
- 34,34'34.34 '
- Schwenkhebelpivoting lever
- 3636
- Nasenose
- 36a36a
- Vorderseitefront
- 36b36b
- Rückseiteback
- 37,37'37.37 '
- Achseaxis
- 38,38'38.38 '
- Druckfedercompression spring
- 4040
- vorgeformtes Einzelteilpreformed item
- 4242
- Transportstreifentransport strip
- 42a42a
- Lochhole
- 5050
- zweite Werkzeughälftesecond tool half
- 6060
- PressePress
- 6161
- obere Pressenplatteupper press plate
- 6262
- untere Pressenplattelower press plate
- 6363
- Rahmenframe
- 6464
- Elektromotor der PresseElectric motor of the press
- 6565
- Exzenterantriebeccentric
- 6666
- Steuerung der PresseControl of the press
- 6868
- Steuergerät des ServomotorsControl unit of the servomotor
Claims (11)
einer ersten Werkzeughälfte (10) und einer gegenüber der ersten Werkzeughälfte in einer Hubrichtung bewegbaren zweiten Werkzeughälfte (50), wobei die zweite Werkzeughälfte (50) gegen die erste Werkzeughälfte (10) mittels einer Presse in einer oszillierenden Hubbewegung antreibbar ist, wenigstens einer an der ersten Werkzeughälfte gehaltenen Vorschubeinrichtung (20), welche vorgeformte Einzelteile (40), welche an einem gelochten Transportstreifen (42) gehalten sind, in einer senkrecht zur Hubrichtung stehenden Vorschubrichtung (-X) getaktet dem Werkzeug zuführt und in diesem weitertransportiert, wobei die Vorschubeinrichtung (20) einen Elektromotor mit einer Antriebsachse (23) aufweist,
dadurch gekennzeichnet, dass die Antriebsachse (23) über ein Pleuel-Getriebe mit einem an der ersten Werkzeughälfte gehaltenen Vorschubelement (30) verbunden ist, welches durch das Pleuel-Getriebe in eine oszillierende Bewegung in Vorschubrichtung und zurück versetzbar ist, wobei das Vorschubelement eine sich quer zur Vorschubrichtung erstreckende Nase (36) zum Eingriff in ein Loch (42a) des Transportstreifens (42) aufweist und wobei
zumindest der Abschnitt des Vorschubelements, von welchem sich die Nase (36) erstreckt, gegen die Kraft wenigstens eines parallel zur Erstrekkungsrichtung der Nase wirksamen Rückstellelements bezüglich der ersten Werkzeughälfte beweglich ist.Tool with
a first mold half (10) and a relative to the first mold half in a stroke direction movable second mold half (50), wherein the second mold half (50) against the first mold half (10) by means of a press in an oscillating lifting movement is driven, at least one of the the first mold half held feed device (20) which preformed items (40) which are held on a perforated transport strip (42) in a direction perpendicular to the stroke direction feed direction (-X) clocked the tool feeds and transported in this, wherein the feed device ( 20) has an electric motor with a drive axle (23),
characterized in that the drive axle (23) is connected via a connecting rod gear with a held on the first tool half feed element (30) which is displaceable by the connecting rod gear in an oscillating movement in the feed direction and back, wherein the feed element is a Having transversely to the feed direction extending nose (36) for engagement in a hole (42a) of the transport strip (42) and wherein
at least the portion of the advancing element, from which extends the nose (36) is movable relative to the force of at least one parallel to the Erstrekkungsrichtung the nose restoring element with respect to the first mold half.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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EP13003463.0A EP2823908B1 (en) | 2013-07-09 | 2013-07-09 | Forming tool with a feeding device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP13003463.0A EP2823908B1 (en) | 2013-07-09 | 2013-07-09 | Forming tool with a feeding device |
Publications (2)
Publication Number | Publication Date |
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EP2823908A1 true EP2823908A1 (en) | 2015-01-14 |
EP2823908B1 EP2823908B1 (en) | 2016-11-30 |
Family
ID=48832728
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EP13003463.0A Not-in-force EP2823908B1 (en) | 2013-07-09 | 2013-07-09 | Forming tool with a feeding device |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105013968A (en) * | 2015-07-15 | 2015-11-04 | 苏州金牛精密机械有限公司 | Automatic feeding and stamping equipment |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2063137A (en) * | 1979-08-14 | 1981-06-03 | Toyo Seikan Kaisha Ltd | Method and apparatus of feeding material for progressive punching |
EP0401355B1 (en) * | 1988-12-15 | 1993-12-29 | The Whitaker Corporation | Sprocket-type strip feed |
US20120085805A1 (en) * | 2010-10-08 | 2012-04-12 | Keiichi Morishita | Feeder apparatus for metal strip |
-
2013
- 2013-07-09 EP EP13003463.0A patent/EP2823908B1/en not_active Not-in-force
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2063137A (en) * | 1979-08-14 | 1981-06-03 | Toyo Seikan Kaisha Ltd | Method and apparatus of feeding material for progressive punching |
EP0401355B1 (en) * | 1988-12-15 | 1993-12-29 | The Whitaker Corporation | Sprocket-type strip feed |
US20120085805A1 (en) * | 2010-10-08 | 2012-04-12 | Keiichi Morishita | Feeder apparatus for metal strip |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105013968A (en) * | 2015-07-15 | 2015-11-04 | 苏州金牛精密机械有限公司 | Automatic feeding and stamping equipment |
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