EP2842654B1 - Device and method for transferring workpieces into and out of a tool - Google Patents

Description

The invention relates to a device for transferring workpieces into and out of a tool according to the preamble of claim 1.

The invention further relates to a method for transferring workpieces into and out of a tool according to the preamble of claim 10.

State of the art

From the EP2 036 629 B1 a method and an apparatus for fine cutting and forming a workpiece from a tape strip is known in which a plurality of processing stages lie on a circular path and the transfer of the workpieces from one processing stage to the next is accomplished by a rotatable cutting plate.
This results in that the cutting plate has both a cutting function and transport function, which on the one hand leads to a complicated structure of fineblanking tool and on the other hand favors the wear of the cutting plate by the continuous sequence of alignment and locking for cutting and rotational movement to transport the workpieces. A constant monitoring of the active elements is therefore necessary if the precision and accuracy of fineblanking parts to be met.

Furthermore, from the EP 2 444 172 A1 a device for discharging fine blanking or fine blanking parts from a tool known, which is used for transporting the workpiece of a linearly displaceable cross slide, which is when moving the tool into the working space between the workpieces and moved out when closing out of the tool.
For multi-stage tools this means that the respective work operation can only be performed after the cross slide has been moved out of the tool, so that the opening time of the tool must be sized accordingly, whereby the production time per part increases and the productivity decreases.
In addition, linear slides require sufficient space and therefore counteract a compact design of the tool.
From the EP 2 233 221 A2 In addition, there is known a punching device for a progressive die cutting press for the production of metal stampings from a sheet metal strip, from which the stamped part is formed in successive processing steps by means of transfer from one processing station to the next and in which use is made of the known transfer technology, which provides at the first processing station, the stamped part is separated from the sheet metal strip, which is a station for feeding and separating and / or folding and / or drawing, the processing stations of the stamping press being arranged along a circular path starting with a feeding and separating station and ends with an unloading station, and that the transfer of the stamped part from one processing station to the next is accomplished by means of an arm-star rotating about an axis passing through the center of the circular path and perpendicular to the plane passing through the matrices of the processing stations of the punch press is defined. The arm star is provided with gripping jaws whose arrangement is selected so that during processing during the punching stroke the individual gripping jaws are in free space between two processing stations, the arm star after each transfer operation with the stamped part from one processing station to the next in his Starting position returns.
Another solution that makes use of a circular transfer path is the US 4,287,748 known.

task

In this prior art, the present invention seeks to provide an apparatus and a method for Transfer of workpieces in and out of multi-stage cutting and machining tools to provide, with which it is possible to move in and out of the slide from the tool while increasing the number of strokes and economy with high precision of the parts, improved compactness of the tool and Simplified design largely avoided.

This object is achieved by a device of the aforementioned type with the features of claim 1 and by a method having the features of claim 10.

Advantageous embodiments of the device and the method are the dependent claims.

The solution according to the invention is based on the knowledge of forming the rotary valve and the cutting stage and the individual processing stages with a discharge stage as separate, mutually supporting units which are arranged about a rotational axis of the rotary valve mounted on the lower block, wherein the transfer openings and the discharge opening on a circular path lie, which coincide with the circular paths of the active elements of the cutting stage, processing stages and Ausschleusstufe and which have a distance from each other which is identical to the arc distance of the active elements on the circular paths, and in that the rotary valve comprises a slide plate in which the transfer openings and the discharge opening for Receiving the blanks are adapted to the size and shape of the cutting and processing stages, wherein the slide plate with a coaxial to the circular path approximately tangential to the lower Pressure plate and the lower bezels arranged linear drive for performing a horizontal pivoting movement about a fixed to the lower block of the lower part rotational axis is connected such that arranged on the circular path transfer openings and the discharge opening of the slide plate after its pivoting in the direction of cutting by a the arc distance of cutting and processing stages on the circular path corresponding measure the blanks capture and can store them after pivoting back the slide plate from the cutting stage in the subsequent processing stages, and that the slide plate between the borders of the active elements of the processing stages of upper and lower part when closing is clamped such that the Active elements through the transfer openings through the blanks can edit. The slide plate thus becomes an integral part of the tool.

In a further embodiment of the invention, the axis of rotation of the slide plate of the slider plate facing away from the edge of the tape strip has a distance corresponding to the radius of the slide plate.
This makes it possible to provide in the strip running direction of the tape strip two opposite mirrored rotary slide with opposite pivoting directions for transferring the blanks and workpieces, wherein the two rotary valves are arranged in the strip running direction offset from one another at a distance approximately to four times the arc distance of cutting stage and first processing stage the circular path corresponds.

In an expedient further embodiment of the device according to the invention, the slide plate is in one Plane arranged, which allows the horizontal pivoting of the slide plate with the transfer openings and the discharge opening directly on the respective active elements of the cutting stage and processing stages when the tool is open. The transfer openings and the discharge opening thereby reach a position in which they can pick up the blanks and record them for transfer.

According to a further embodiment of the invention, the slide plate is formed as a partial body of a circular disk, on whose periphery facing the linear drive a driver is provided, which is connected to a guided in a guide rail of the linear drive carriage for carrying out the pivotal movement of the slide plate about the axis of rotation.

A further advantage is that the slide plate has stop plates, which stops are assigned to the borders of the active elements of the lower part for limiting the displacement of the linear drive to the arc distance between fineblanking stage and processing stages.

A preferred further embodiment of the device according to the invention provides that the transfer opening for the cutting stage with claws for gripping it cut blank, the transfer openings for the processing stages with transport masks for aligning and fixing the blanks and the opening for the discharge of the finished workpiece with Transsportmagneten for lifting and feeding into a chute.

According to a further preferred embodiment of the device according to the invention, the Ausschleusstufe a fixed on the upper block of the upper part of the presser, which is arranged on the circular path and the finished workpiece from the transport magnet of the discharge opening separates into a chute for discharging.

In a further preferred embodiment of the invention, the chute is arranged perpendicular to the circular path and parallel to the strip running direction, wherein the chute is connected to at least one conveyor belt for discharging the finished workpieces whose discharge direction is perpendicular to the chute.

The object is further achieved in that the transfer of the blanks between the cutting stage and the processing stages with open tool by a reversible, provided with transfer openings and a discharge opening slide plate takes place, the blank cut in the cutting blank by a first pivoting movement to the arc distance between the cutting stage and the processing steps detected corresponding measure and spends in a second opposite to the first pivoting direction identical radians for processing in the first processing stage, at the same time the blanks are moved from the first processing stage and the other processing stages in the respective subsequent processing stage and finished Workpiece is discharged.

1. a) Halten des Bandstreifens an der Führungsplatte des Oberteils beim Öffnen des Werkzeugs durch Absenken des Unterteils;
2. b) Schwenken der Schieberplatte mit ihren auf der Kreisbahn liegenden Transferöffnungen und der Ausschleusöffnung bis die erste der Schneidstufe zugewandte Transferöffnung die Schneidstufe, die restlichen Transferöffnungen die Bearbeitungsstufen und die Ausschleusöffnung die letzte Bearbeitungsstufe überdecken,
3. c) Ausstoßen der Rohlinge aus der Schneidstufe und den Bearbeitungsstufen in die jeweiligen Transferöffnungen und des fertigen Werkstücks in die Ausschleusöffnung,
4. d) Schwenken der Schieberplatte in eine dem Schritt b) entgegengesetzte Richtung mit den von den Transferöffnungen erfassten Rohlingen bis die Schieberplatte die Schneidstufe freigibt und die Transferöffnungen mit den Rohlingen die nachfolgenden Bearbeitungsstufen erreichen,
5. e) Ausrichten und Zentrieren der Rohlinge in den Bearbeitungsstufen und Aufnehmen des fertigen Werkstücks in der Ausschleusöffnung,
6. f) Klemmen der Schieberplatte zwischen den Einfassungen der Aktivelemente der Bearbeitungsstufen von Ober- und Unterteil zeitgleich mit dem Klemmen des Bandmaterials in der Schneidstufe beim Schließen von Ober- und Unterteil in der gemäß Schritt e) erreichten Lage, so dass die Aktivelemente der Bearbeitungsstufen durch die Transferöffnungen hindurch die Rohlinge bearbeiten können, ein neuer Rohling in der Schneidstufe geschnitten und das fertige Werkstück aus der Ausschleusöffnung durch einen Abdrücker zum Abtransport in eine Rutsche gedrückt wird.

The method according to the invention essentially proceeds with the following steps:

1. a) holding the tape strip on the guide plate of the upper part when opening the tool by lowering the lower part;
2. b) pivoting the slide plate with its lying on the circular path transfer openings and the discharge opening until the first of the cutting stage facing transfer opening cover the cutting stage, the remaining transfer openings the processing stages and the discharge opening the last processing stage,
3. c) ejecting the blanks from the cutting stage and the processing stages into the respective transfer openings and the finished workpiece into the discharge opening,
4. d) pivoting the slide plate in a direction opposite to step b) with the blanks detected by the transfer openings until the slide plate releases the cutting step and the transfer openings with the blanks reach the subsequent processing steps,
5. e) aligning and centering the blanks in the processing stages and picking up the finished workpiece in the discharge opening,
6. f) clamping the slide plate between the borders of the active elements of the processing stages of upper and lower part simultaneously with the clamping of the strip material in the cutting stage when closing the upper and lower part in the position achieved in step e), so that the active elements of the processing stages through the Transfer openings through the blanks can edit, cut a new blank in the cutting stage and the finished workpiece from the discharge opening is pressed by a push-off for removal into a chute.

Of particular advantage is that the rotary valve is driven by a coaxial to the circular path tangent laid on the lower block fixed linear drive whose displacement corresponds to the arc distance between the cutting and the processing stages on the circular path, so as to ensure that the respective transfer and discharge opening always covers the respective active elements or . is reached and the cutting step for the cutting process is exposed.

In a further embodiment of the method according to the invention, rotary slides are used for the transfer of the cut and processed blanks on each side of the strip strip, wherein the pivot directions of the rotary valve are aligned in opposite directions, so that the entire bandwidth of the tape strip is usable for cutting.

In a further preferred embodiment of the method according to the invention the tape strip is guided in each case with its opposite side edges on the periphery of the slide plate of the rotary valve, whereby the axes of rotation of the rotary valve are equally spaced from the tape strip.

Further advantages, features and details of the invention will become apparent from the following description with reference to the accompanying drawings.

embodiment

The invention will be described below using the example of the production of a fine cutting part with internal teeth be explained in more detail. It is understood that punching or fine blanking parts of other configuration are also covered by the invention.

• Fig. 1 eine perspektivische Ansicht eines aus Oberteil und Unterteil gebildeten Schneid- und Bearbeitungswerkzeugs in geschlossenem Zustand,
• Fig. 2 eine perspektivische Unteransicht des Oberteils der Fig. 1,
• Fig. 3 eine untere Draufsicht auf das Oberteil gemäß Fig. 2,
• Fig. 4 eine perspektivische Ansicht des Unterteil ohne Bandstreifen und Schieberplatten im geschlossenem Zustand des Werkzeugs,
• Fig. 5 eine Draufsicht auf das Unterteil im geöffnetem Zustand des Werkzeugs nach Fig. 4,
• Fig. 6 eine perspektivische Ansicht des Unterteils mit Drehschiebern ohne Bandstreifen im geschlossenem Zustand des Werkzeugs, vergrößerte Ansicht der Halterung des Bandstreifens am Oberteil,
• Fig. 7 eine vergrößerte Ansicht der Halterung des Bandstreifens am Oberteil,
• Fig. 8 eine perspektivische Ansicht der Schieberplatte von der Unterseite her mit Klauen und Transportmasken,
• Fig. 9 eine Draufsicht auf das Unterteil mit unter dem Bandstreifen geschwenkten Drehschiebern im offenen Zustand des Werkzeugs ohne Bandstreifen,
• Fig. 10 eine Draufsicht auf das Unterteil zurückgeschwenkten Drehschiebern im geschlossenem Zustand des Werkzeugs mit Bandstreifen und
• Fig. 11 eine perspektivische Darstellung des Unterteils mit rückgeschwenkten Drehschiebern im geschlossenen Zustand des Werkzeug mit Zuordnung der Rohlinge und des fertigen Werkstücks zu den Transferöffnungen und der Ausschleusöffnung.

Show it

• Fig. 1 a perspective view of a cutting and machining tool formed from the upper part and lower part in the closed state,
• Fig. 2 a perspective bottom view of the upper part of Fig. 1 .
• Fig. 3 a bottom plan view of the upper part according to Fig. 2 .
• Fig. 4 a perspective view of the lower part without tape strips and slide plates in the closed state of the tool,
• Fig. 5 a plan view of the lower part in the open state of the tool after Fig. 4 .
• Fig. 6 a perspective view of the base with rotary valves without tape strip in the closed state of the tool, enlarged view of the holder of the tape strip on the upper part,
• Fig. 7 an enlarged view of the holder of the tape strip on the upper part,
• Fig. 8 a perspective view of Slide plate from the bottom with claws and transport masks,
• Fig. 9 a top view of the lower part with pivoted under the tape strip rotary valves in the open state of the tool without tape,
• Fig. 10 a plan view of the bottom swung back rotary valves in the closed state of the tool with tape and
• Fig. 11 a perspective view of the lower part with swung back sliders in the closed state of the tool with assignment of the blanks and the finished workpiece to the transfer openings and the discharge opening.

The Fig. 1 shows a cutting and machining tool 1 with which a blank 2 is to be cut and processed into a finished workpiece 57 (see Fig. 11 ).
The cutting and machining tool 1 is essentially composed of an upper part 3 and a lower part 4. The upper part 3 is fixed with its upper block 5 fixed to a not shown machine table and with its lower block 6 of a plunger of a press, so that the blank 2 from bottom to top - that is in the direction of top part of a tape strip 7 in the cutting stage 8 or 8.1 is cut.

The cutting and processing tool 1 has two in the strip running direction R spaced cutting stages 8 and 8.1 and each cutting stage more Processing levels 9 to 12 or 9.1 to 12.1 and one each Ausschleusstufe 13 and 13.1. As the Fig. 2 and 3 show, the upper active elements of the cutting stages 8 and 8.1, for example, a cutting punch 14 with inner punch insert 15 and die 16 are arranged in a lying on a pressure plate 17 guide plate 18. The guide plate 18 is formed as an elongated polyhedral body 19 with two bevels 20 and 20.1, which are respectively associated with the cutting stage 8 and 8.1. The upper active elements of the cutting stage 8 and 8.1 lie in the guide plate 18 on a centered around the center P1 / P2 circular path K1 or K2, on which the upper part of the processing stages 9 to 12 or 9.1 to 12.1 as separate circular sector-like upper units A. , B, C and D and a 58 are arranged. The units A to D each have separate pressure plates 21 and bezels 22, in which the upper active elements 23, such as a stamping bell, punches, ejector, setting, clamping and tooth punches, are included.
The bevel angle α on the guide plate 18 is adjusted to the center angle φ of the circular sector-like units A, B, C and D such that it is 0.5 times the center angle φ, so that the unit A directly to the bevel 20 and 20.1 the guide plate 18 comes to lie next to the cutting stage 8 and 8.1 on the circular path K1 and K2.

As the Fig. 2 in conjunction with the Fig. 7 shows, 5 tape guides 24 are provided centrally on each longitudinal side 44 of the upper block, which consist of spaced according to the width BR of the tape strip 7 rollers 25. The guide plate 18 has Band mounts 26 on. As soon as the lower part performs a lowering movement to open the tool, the tape strip 7 is held in position by the tape guides 24 and the tape holders 26, so that sufficient free space is created below the tape strip 7 for corresponding transfer operations.

It is now on the 4 to 6 Referenced. The Fig. 4 represents the basic structure of the lower part 4 in the closed state without the tape strip 7 and the rotary valve 37 to be described later. The lower part 4 comprises a lower block 6, on which the lower parts of the cutting stages 8 and 8.1 as insert 27, cutting inserts 28th and die 29 and the lower active elements 35 of the processing stages 9 to 12 or 9.1 to 12.1 are arranged.
The cutting plate 27 is located as the guide plate 18 in the strip running direction R in the center of the tool and has a shape and shape with the guide plate 18 congruent elongated polyhedron-shaped body 30 with two bevels 31 and 31.1, respectively, the lower parts of the cutting stage 8 and 8.1 are assigned. The lower parts of the cutting stage 8 and 8.1 lie in the cutting plate 27 on a beaten around the center P3 / P4 circular path K3 or K4, on which the lower active elements of the processing stages 9 to 12 or 9.1 to 12.1 as separate circular sector-like lower units E. , F, G and H and a chute 32 of the discharge stages 13 and 13.1 are arranged. The units E to H each have separate lower pressure plates 33 and lower enclosures 34, in which the lower active elements 35, such as anvils, insert inserts, stamping punch, Calibration and supports as well as ejector are included. The bevel angle α1 on the cutting plate 18 is adjusted to the center angle φ1 of the circular sector-like lower units E, F, G and H such that it is 0.5 times the center angle φ1, so that the unit E directly to the bevel 31 and 31.1 of the cutting plate 27 come to rest with the lower active elements of the cutting stage 8 or 8.1 on the circular path K3 or K4 (see Fig. 5 ).
In vertical alignment of the centers P1 / P2 of the lower circular paths K1 / K2 and the centers P3 / P4 of the circular paths K3 / K4 is -as Fig. 6 an axis of rotation DA a slide plate 36 of a rotary valve 37. The axis of rotation DA is received by a mounting plate 38 which is supported on the lower block 6 and above the chamfer 31 and 31.1 directly on the longitudinal sides LS of the cutting plate 27 abuts.
The axis of rotation DA has a distance b from the opposite side edge SR of the tape strip 7, which corresponds to the radius r of the slide plate 36 (see Fig. 10 ).
On the upper side OS of the lower block 6 directly on the front side S, the rotary valve 37 is fixed, which has a linear drive 39 with a guide rail 40 and slide 41 for carrying out a reversible pivotal movement of the slide plate 36 about the axis of rotation DA in an amount on the circular path K1 / K2 or K3 / K4, which corresponds to the arc distance BA between the cutting stage 8 or 8.1 and the first, the cutting stage 8 or 8.1 subsequent processing stage 9 or 9.1.
The guide strip 40 is arranged so that it runs tangentially along the outer circumference of the lower enclosures 34 coaxial to the circular path K3 / K4.
The slide 41 running on the guide rail 41 stops 42.1 and 42.2 are assigned, which are attached to the outer periphery of the lower bezels 34 at such a distance that the displacement of the carriage 41 on the guide rail 40 can be limited to the arc distance BA. The slide plate 36 is provided with corresponding stop plates 59, which stops 42.1 and 42.2 are assigned.
The lower part of the Ausschleusstufe 13 and 13.1 comprises the chute 32 which is fixed to the lower block 6 and with their lying on the circular path K3 / K4 slide entrance 43 under inclination in a laid on the longitudinal sides 44 of the lower part 4 conveyor belt 45 and 45.1 leads to the removal of the finished workpieces.

The Fig. 8 shows the perspective view of the slide plate 36 which is formed as a partial body of a circular disc which is rotatable about the axis of rotation DA and thus about the centers P1 / P2 and P3 / P4 of the upper and lower circular path K1 / K2 and K3 / K4. The slide plate 36 is provided with transfer ports 46, 47, 48 and 49 and a discharge port 50. The transfer openings 46 to 49 and the discharge opening 50 lie on a circular path K5, which coincides with the circular paths K1 / K2 and K4 / K5 and have a distance from each other, the arc distance BA of the center distances of the upper and lower active elements 23 and 35 of the processing stages 9 to 12 or 9.1 to 12.1 correspond to the circular paths.
The slide plate 36 has on its outer periphery 51 a projection 55 for attachment of a driver 53, which is connected to the carriage 41 of the linear drive 39 for carrying out a reversible pivoting movement between the Stops 42.1 and 42.2 is connected to the axis of rotation DA. In the transfer opening 46 claws 54 are used, which can detect the cut in the cutting stage 8 and 8.1 blank 2, as soon as the transfer port 46 passes through the pivoting movement about the axis of rotation DA on the cutting stage 8 and 8.1.
The transfer openings 47 to 49 are provided with transport masks 55, which allow an exact fixing and alignment of the blanks 2 with respect to the respective processing stage.
The discharge opening 50 has transport magnets 56 which fix the finished workpiece 58 and position it for removal via the slide entrance 43.

Hereinafter, the inventive method is based on the Fig. 7 . 9 to 11 explained.
The Fig. 7 shows the position of the tape strip 7 at the upper block 5. When lowering the lower part 4 to open the tool 1, the tape strip 7 is held by the arranged on the guide plate 18 tape holder 26 and attached to the upper block 5 tape guides 24 so that a corresponding space arises over the cutting stage 8 or 8.1.
The slide plates 36 have -as Fig. 9 shows a horizontal pivoting movement in the direction of arrow on the circular path K5 in the arc distance BA around the axis of rotation DA under the tape strip 7 in a lying directly above the active elements level, so that the first of the cutting stage 8 and 8.1 facing transfer opening 46 on the active elements of the cutting stage 8 or 8.1 comes to rest. At the same time, the transfer openings 47 to 49 via the corresponding active elements of the processing stages and the discharge opening 50 on the corresponding active elements of the processing stages 9 to 11 or 9.1 to 11 moves and the discharge opening 50 reaches the processing stage 12. The extension 52 of the slide plate 36 is then located on the stop 42.2, which is arranged on the outer circumference of the lower enclosures 34.
The blank 2 cut in the cutting stage 8 or 8.1, the processed blanks 2 in the other processing stages 9 to 11 and 9.1 to 11.1 and the finished workpiece 57 are inserted into the transfer openings 46 to 49 and the finished workpiece 58 into the discharge opening 50 ejected at the same time.
The slide plate 36 pivots on the circular path K5 with the detected blanks 2 and the finished workpiece 57 in a direction opposite to the first pivoting movement direction by the arc distance BA back. The slide plate 36 releases the cutting stage 8 or 8.1. The transfer openings 46 to 49 with the blanks 2 reach the processing stages 9 to 12, which are stored in a correct position by the claws 54 and transport masks 55 located in the transfer openings 46 to 49 in the processing stages 9 to 12 or 9.1 to 12.1. At the same time the finished workpiece 57 was transported through the discharge opening 50 with the transport magnet 56 to the slide entrance 43 of the Ausschleusstufe 13 and 13.1.
The Fig. 10 and 11 show the position of the conveyor belt 7 and the slide plates 36 in plan view and in perspective view of the lower part 4 in the closed state of the tool first
The tape strip 7 is clamped in this state between the guide plate 18 of the upper part 3 and the cutting plate 27 of the lower part 5 and the cutting operation in the cutting stage 8 and 8.1 can be done.
Simultaneously with the clamping of the tape strip 7 in the cutting stage 8 and 8.1, the slide plate 36 between the lower bezels 34 and upper bezels 22 is also clamped. The transfer openings 46 to 49 and the discharge opening 50 have assumed such a position that the upper and lower active elements 23 and 35 can process the blanks 2 through the openings 46 to 50 and the finished workpiece 57 can be processed by the ejector 58 from the transport magnets 56 can be separated.
At the same time, the cutting process in the cutting stage 8 or 8.1 begins again and the transfer process described above continues after opening the tool 1 as described.

The tape strip 7 is guided over the center of the tool 1 so that the tape strip 7 is guided in each case with its side facing the slider plate 36 side edges SR on the periphery 51 of the slide plate 36, so that for the transfer of cut and processed blanks 2 and finished workpieces 57 on each side of the tape strip 7, a rotary valve 37 can be used, the pivot directions are aligned in opposite directions to each other. The rotary valve 37 are arranged offset in the direction of tape R by about four times the sheet spacing BA, so that a sufficient cycle time for each processing cycle is available. LIST OF REFERENCE NUMBERS SchneidundBearbeitungswerkzeug 1 blank 2 Top of 1 3 Lower part of 1 4 Upper block of 3 5 Lower block of 4 6 tape strips 7 cutting stage 8, 8.1 processing stages 9,10,11,12; 9.1,10.1,11.1,12.1 Ausschleusstufen 13, 13.1 cutting punch 14 punch insert 15 dies 16 Pressure plate for 8, 8.1d 17 Guide plate for 8, 8.1 18 Polyhedral body of 18 19 Bevels on 18 20, 20.1 Pressure plate for assembly A, B, C, D 21 Upper enclosures of unit A, B, C, D 22 Upper active elements of A, B, C, D 23 tape guides 24 roll 25 tape holder 26 Insert of 8, 8.1 27 Inserts insert of 8, 8.1 28 Embossing stamp of 8, 8.1 29 Polyhedral body of 27 30 Beveling of 27 31, 31.1 slide 32 Lower pressure plate assembly E, F, G, H 33 Lower surrounds for unit EH 34 Lower active elements of unit EH 35 slide plate 36 rotary vane 37 Mounting plate for DA 38 linear actuator 39 Guide bar of 39 40 Sleigh of 39 41 attacks 42.1, 42.2 slides input 43 Long side of 4 44 conveyor belt 45, 45.1 transfer openings 46,47,48,49 Ausschleusöffnung 50 Outer periphery of 36 51 Extension to 36 52 takeaway 53 Claws in 46 54 Transport masks for 47-49 55 Transport magnets to 50 56 Finished workpiece 57 bead breaker 58 Stop plates on 36 59 Upper unit A, B, C, D arc distance BA Distance of the rotary valve in the direction of tape R BD Width of 7 BR Distance of rotation axis to side edge SR b axis of rotation THERE Lower unit E, F, G, H Upper circular path K1, K2 Lower circular path K3, K4 Circular path of the transfer openings K5 Long side of the cutting plate 27th LS Center of the circular paths P1, P2, P3, P4 Top of the lower block 6 OS Tape direction R Radius of the slide plate 36 r Front side of the lower block 6 S Bevel angles of 20.20.1; 31.312.1 α, α1 Central angle φ, φ1

Claims (14)

1. Device for transferring workpieces into and out of a tool, in particular a multi-stage cutting and machining tool, with upper part (3) comprising a cutting stage (8, 8.1) comprising at least one cutting punch (14), a guide plate (18) and pressure plate (17), and a lower part (4) containing at least one cutting plate (27) and pressure plate, for cutting a blank (2) out of a strip (7), a plurality of machining stages (9, 10, 11, 12 and 9.1, 10.1, 11.1, 12.1) lying on a circular path (K1, K2; K3, K4) comprising active elements (23) in the form of punches and surrounds of the upper part (3) and active elements (35) in the form of cutting plate, ejector, embossing anvil, pressure plate (33) and surrounds (34) of the lower part (4) for a machining cycle comprising perforating, embossing, pre-shaping, drawing or tooth cutting, the strip (7) being clamped in between cutting and guide plate when the upper and lower part (3, 4) are closed, and, in the open position of upper and lower part (3, 4), it being possible for the strip (7) to be moved in the strip running direction (R) and the blanks (2) being moved cyclically from stage to stage by a slider, the slider being formed as a rotary slider (37) provided with a plurality of transfer openings (46, 47, 48, 49) and a removal opening (50),
   charactrized in that
   the rotary slider (37), the cutting stage (8, 8.1) and the individual machining stages (9, 10, 11, 12; 9.1, 10.1, 11.1, 12.1) are formed with a removal stage (13, 13.1) comprising separate modules (A, B, C, D; E, F, G, H) supporting one another, which are arranged around an axis of rotation (DA) of the rotary slider (37) that is mounted on the lower block (6), wherein the transfer openings (46, 47, 48, 49) and the removal opening (50) lie on a circular path (K5) which coincides with the circular paths (K1, K2; K3, K4) of the active elements (23, 35) of the cutting stage (8, 8.1), the machining stages (9, 10, 11, 12; 9.1, 10.1, 11.1, 12.1) and the removal stage (13, 13.1) and have a spacing from one another which is identical to the spacing of the active elements (23, 35) on the circular paths (K1, K2; K3, K4), and in that the rotary slider (37) comprises a slider plate (36), in which the transfer openings (46, 47, 48, 49) and the removal opening (50) for receiving the blanks (2) are provided, which are matched to the active elements of the cutting and machining stages (8, 8.1; 9, 10, 11, 12; 9.1, 10.1, 11.1, 12.1) and the removal stage (13, 13.1), wherein the slider plate (36) is connected to a linear drive (39), arranged coaxially with respect to the circular path (K1, K2; K3, K4), approximately tangentially with respect to the pressure plate (33) and the surrounds (34), for executing a pivoting movement about an axis of rotation (DA) fixed to the lower block (6) of the lower part (4), in such a way that the transfer openings (46, 47, 48, 49) arranged on the circular path (K5) and the removal opening (50) of the slider plate (36), after their pivoting in the direction of the cutting stage (8, 8.1) by an amount corresponding to the arcuate spacing (BA) of cutting and machining stages (8, 8.1; 46, 47, 48, 49) on the circular path (K5), grip the blanks (2) and, after pivoting the slider plate (36) back out of the cutting stage (8, 8.1), can deposit the same in the following machining stages (9, 10, 11, 12; 9.1, 10.1, 11.1, 12.1), and in that the slider plate (36) can be clamped between the surrounds (22, 34) of the active elements (23, 35) of the machining stages (9, 10, 11, 12; 9.1, 10.1, 11.1, 12.1) by the upper and lower part (3, 4) as they are closed, such that the active elements (23, 35) can machine the blanks (2) through the transfer openings (46, 47, 48, 49).
2. Device according to Claim 1, characterized in that the axis of rotation (DA) is at a distance (b) from the side edge (SR) of the strip (7) that faces away from the slider plate (36) which corresponds to the radius (r) of the slider plate (36) .
3. Device according to Claim 1, characterized in that in the strip running direction (R) of the strip (7), two rotary sliders (37) arranged opposite each other in mirror-image fashion and having mutually opposite pivoting directions are provided to transfer the blanks (57) and workpieces (57), wherein the two rotary sliders (37) are arranged to be offset relative to each other in the strip running direction (R) at a distance (BD) which corresponds approximately to four times the arcuate spacing (BA) of cutting stage (8, 8.1) and first machining stage (46).
4. Device according to Claim 1, characterized in that the slider plate (36) is arranged in a plane which permits the slider plate (36) having the transfer openings (46, 47, 48, 49) and the removal opening (50) to be pivoted horizontally directly above the respective active elements of the cutting stage (8, 8.1) and the machining stages (9, 10, 11, 12; 9.1, 10.1, 11.1, 12.1) when the tool is opened.
5. Device according to Claim 1, characterized in that the slider plate (36) is formed as part of a circular disc, on the periphery (51) of which, facing the linear drive (39), a driver (53) is provided, which is connected to a carriage (41) guided in a guide strip (40) of the linear drive (39), for executing the pivoting movement of the slider plate (36) about the axis of rotation (DA).
6. Device according to Claim 1, characterized in that the slider plate (36) has stop plates (59), to which stops (42.1, 42.2) on the outer circumference of the surrounds (34) of the lower active elements (35) of the lower part (4) are assigned to limit the displacement travel of the carriage (41) to the arcuate spacing (BA) between fine cutting stage (8, 8.1) and the machining stages (9, 10, 11, 12; 9.1, 10.1, 11.1, 12.1).
7. Device according to Claim 1, characterized in that the transfer opening (46) for the cutting stage (8, 8.1) is provided with claws (54) for gripping the cut blank (2), the transfer openings (47, 48, 49) for the machining stages (9, 10, 11, 12) are provided with transport masks (55) for aligning and fixing the blanks (2), and the removal opening (50) for the removal of the finished workpiece (57) is provided with transport magnets (56) for lifting and feeding into a chute (32).
8. Device according to Claim 1, characterized in that the removal stage (13, 13.1) has a depresser (58) which is fixed to the upper block (5) of the upper part (3), is arranged on the circular path (K5) and separates the finally machined workpiece (57) from the transport magnets (56) of the removal opening (50) for removal into the chute (32).
9. Device according to Claim 8, characterized in that the chute (32) for discharging the finally machined workpieces (57) is arranged at right angles to the circular path (K5) and parallel to the strip running direction (R), wherein the chute (32) is connected to at least one conveyor belt (45, 45.1) for discharging the finally machined workpieces (57), the discharge direction of which is at right angles to the chute.
10. Method for transferring workpieces in a tool, in particular a multi-stage cutting and machining tool, in which, in an upper part (3) comprising a cutting stage (8, 8.1) comprising at least one cutting punch (14), a guide plate (18) and pressure plate (17), and a lower part (4) containing at least one cutting plate (27) and pressure plate (33), a blank (2) is cut out of a clamped strip (7) which, in a plurality of machining stages (9, 10, 11, 12; 9.1, 10.1, 11.1, 12.1) lying on a circular path (K1, K2; K3, K4) comprising active elements (23) in the form of punches and surrounds of the upper part (3) and active elements (35) in the form of cutting plate, ejector, embossing anvils, pressure plate (33) and surrounds (34) of the lower part (4), is successively subjected to form perforating, embossing, pre-shaping, drawing or tooth cutting, when the upper and lower part (3, 4) are open, the blanks (2) being moved from stage to stage by a slider formed as a rotary slider (37) and the strip (7) being moved cyclically in the strip running direction, characterized in that the transfer of the blanks (2) between the cutting stage (8, 8.1) and the machining stages (9, 10, 11, 12; 9.1, 10.1, 11.1, 12.1) with the tool open is carried out by a reversible slider plate (36) provided with transfer openings (46, 47, 48, 49) and a removal opening (50), which grips the blank (2) cut in the fine cutting stage (8, 8.1) by a first pivoting movement by an amount corresponding to the arcuate spacing (BA) between the cutting stage (8, 8.1) and the machining stages (9, 10, 11, 12; 9.1, 10.1, 11.1, 12.1) and, in a second movement of an identical arcuate amount offset to the first pivoting movement, moves the said blank into the first machining stage (9, 9.1) for machining, wherein at the same time the blanks (2) from the first machining stage (9, 9.1) and the other machining stages (10, 11, 12; 10.1, 11.1, 12.1) are displaced into the respective following machining stage and the finally machined workpiece (57) is removed.
11. Method according to Claim 10, characterized by the following working steps proceeding one after another:

    a) holding the strip (7) on the guide plate (18) of the upper part (3) as the tool is opened, by lowering the lower part (4);

    b) pivoting the slider plate (36) with its transfer openings (46, 47, 48, 49) lying on the circular path (K5) and the removal opening (50), until the first transfer opening (46) facing the cutting stage (8, 8.1) overlaps the cutting stage (8, 8.1) and the remaining transfer openings (47, 48, 49), the machining stages (9, 10, 11; 9.1, 10.1, 11.1) and the removal opening (50) overlap the last machining stage (12; 12.1),

    c) ejecting the blanks (2) from the cutting stage (8, 8.1) and the machining stages (9, 10, 11, 12; 9.1, 10.1, 11.1, 12.1) into the respective transfer openings (46, 47, 48, 49) and the finished workpiece (57) into the removal opening (50),

    d) pivoting the slider plate (36) in a direction opposite to step b) with the blanks (2) gripped by the transfer openings (46, 47, 48, 49) until the slider plate (36) exposes the cutting stage (8, 8.1) and the transfer openings (46, 47, 48, 49) with the blanks (2) reach the following machining stages (9, 10, 11, 12; 9.1, 10.1, 11.1, 12.1),

    e) aligning and centring the blanks (2) in the machining stages (9, 10, 11, 12; 9.1, 10.1, 11.1, 12.1) and receiving the finished workpiece (57) in the removal opening (50),

    f) clamping the slider plate (36) between the surrounds (22, 34) of the active elements (23, 35) of the machining stages (9, 10, 11, 12; 9.1, 10.1, 11.1, 12.1) of upper part and lower part (3, 4) at the same time as the clamping of the strip material (7) in the cutting stage (8, 8.1) as the upper and lower part (3, 4) are closed in the position reached in accordance with step e), so that the active elements (23, 35) of the machining stages (9, 10, 11, 12; 9.1, 10.1, 11.1, 12.1) can machine the blanks (2) through the transfer openings (46, 47, 48, 49), a new blank (2) is cut in the cutting stage (8, 8.1), and the finished workpiece (57) is forced out of the removal opening (50) into a chute (32) by a depresser (58) .
12. Method according to Claim 10, characterized in that the rotary slider (37) is driven by a linear drive (39) which is placed tangentially coaxially with respect to the circular path (K5), is fixed to the lower block (6) of the lower part (4) and of which the displacement travel corresponds to the arcuate spacing (BA) between the cutting stage (8, 8.1) and the machining stages (9, 10, 11, 12; 9.1, 10.1, 11.1, 12.1) on the circular path (K5).
13. Method according to Claim 10, characterized in that for the transfer of cut and machined blanks (2), in each case a rotary slider (37) on each side of the strip (7) is used, wherein the pivoting directions of the rotary slider (37) are aligned oppositely to one another.
14. Method according to Claim 10, characterized in that the strip (7) is in each case guided with its side edges (SR) facing away from the rotary slider via the periphery (51) of the slider plate (36) of the rotary slider (37).

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