Punching tool

Abstract

The application relates to a punching tool (10) for punching a workpiece (31) out of a blister (30) in a punching device (1). The punching tool (10) according to the invention has a cutting stamp (11) which is connected to a tool body (19) and is designed to be moved relative to a cutting plate (40) in such a way that the workpiece (31) is punched out of the blister (30). Furthermore, it has a suction device (12) which is designed to fix the workpiece (31) by means of negative pressure at least during the movement of the cutting stamp (11). In addition, a guide tube (14), which is fastened in the tool body (19), and a pressure chamber (18) having a pressure inlet (17), said pressure chamber being formed in the tool body (19), are provided in the punching tool (10) according to the invention. Furthermore, the punching tool (10) has a suction tube (13) which protrudes through the cutting stamp (11) and is designed to establish a fluidic connection between the suction device (12), connected to the suction tube (13), and the pressure chamber (18), wherein the suction tube (13) is arranged movably within the guide tube (14) in the direction of movement of the cutting stamp (11) and is designed, in the event of an overpressure in the pressure chamber (18), to be moved thereby into a discharging position and, in the event of a negative pressure in the pressure chamber (18), to be moved thereby into a fixing position.

Description

[0001] punching tool

[0002] The application relates to a punching tool for punching a workpiece out of a blister pack in a punching device. The application also relates to a method for operating a punching tool, in particular according to the invention. The punching tool according to the invention is intended for use in a punching device.

[0003] Punching is a separation process for producing flat parts from different materials using a punching press or a punching device. Individual workpieces are separated from a raw material or blister pack using a cutting punch, which is moved relative to a cutting plate. For the purposes of this application, a blister pack is understood to be the starting material from which specific parts (workpieces) are to be punched out by the punching tool. The blister pack thus connects all workpieces in their unpunched state and is usually designed as a strip that is gradually added to a punching device to punch out the workpieces between the cutting punch and cutting plate of a corresponding punching tool.The workpieces can consist of only the material of the entire blister pack, with only the corresponding shape being punched out, or they can be prefabricated on the blister pack and include corresponding electrical circuits or similar components applied to the base material of the blister pack. Thus, the individual workpieces are integrated into the blister pack before punching.

[0004] Such punching devices usually have a suction device (suction cup) which fixes the workpiece to be punched out and presses it against the cutting punch so that the workpiece does not move on the cutting punch when the latter is moved in relation to the cutting plate and the workpiece is separated from the blister between the cutting punch and cutting plate. The suction cup is operated with compressed air, with a vacuum being created on the suction cup to generate the suction force, thereby fixing the workpiece. After the punching process, the workpiece is transferred to a pick-and-place system, which, for example, also has a corresponding vacuum suction cup. During the transfer from the punching tool to the pick-and-place system, the suction force of the punching tool's suction cup is canceled by the vacuum no longer being applied to the suction cup.In the production of chips for credit cards or other security-relevant documents, a blister or blister strip containing several prefabricated chips connected by a carrier material is fed into such a punching device, where the individual chips are separated from the carrier material as workpieces. The chips, such as EMV chips, comprise a small memory unit, a processing unit, or similar components. The blister has an adhesive layer, for example in the form of a hot-melt layer, with which the punched-out chips are then glued into a document or card.

[0005] The adhesive layer can sometimes cause the chips to stick to the cutting punch after being removed from the blister, even if the suction cup is no longer under vacuum. In this case, the suction force of the pick-and-place system is sometimes insufficient to release the workpiece, i.e., the individual chip, from the cutting punch. As a result, the chip cannot be transferred, and the production process comes to a halt. With a throughput of up to 5,000 chips per hour in such systems, such errors result in expensive downtime. This also leads to lower production output and increased maintenance costs.

[0006] It is therefore an object of the present invention to provide a punching tool and a method for operating a punching tool by means of which the transfer process of the workpiece after the punching process by the cutting punch can be improved and the punched workpiece can be safely removed from the cutting punch in order to significantly reduce downtime and maintenance effort.

[0007] The object is achieved by the subject matter of the independent claims. Advantageous embodiments of the invention are disclosed in the subclaims. It should be noted at this point that advantageous embodiments of the punching tool according to the invention are also to be understood as disclosures of advantageous embodiments of the method according to the invention, even if the wording of the description of the advantageous embodiment is directed to a device and not to a method. Thus, embodiments of the invention formulated as device features also disclose method features of a preferred embodiment of the method according to the invention. The same applies vice versa.

[0008] The punching tool according to the invention for punching a workpiece out of a blister pack comprises a cutting punch which is connected to a tool body and is designed to be moved relative to a cutting plate in such a way that the workpiece is punched out of the blister pack. Furthermore, it comprises a suction cup, preferably designed as a suction cup and in particular having a conical shape, which is designed to

[0009] The workpiece must be secured by means of a vacuum at least during the movement of the cutting punch.

[0010] In addition, a guide tube, which is fastened in the tool body, and a pressure chamber with a pressure inlet, which is formed in the tool body, are provided in the punching tool according to the invention. Furthermore, the punching tool has a suction tube that protrudes through the cutting punch and is designed to establish a fluidic connection between the suction device connected to the suction tube and the pressure chamber. The suction tube is arranged within the guide tube so as to be movable in the direction of movement of the cutting punch and is designed to be moved by the cutting punch into a release position when there is excess pressure in the pressure chamber and to be moved by the cutting punch into a fixing position when there is negative pressure in the pressure chamber.

[0011] A fluidic connection in the sense of the application is a connection through which gases can flow, thus enabling pressure equalization between the two sides of the connection. The fluidic connection therefore enables a gaseous working medium (fluid), in particular air, to flow through. The release position defines the position of the suction cup or the connected suction pipe in which the workpiece is removed from the cutting punch by another device, such as a pick-and-place system, in particular in the form of another suction cup that works with negative pressure. The workpiece is detached from the cutting punch and does not touch it. The fixing position, on the other hand, is understood to be the position in which the workpiece is fixed on the cutting punch by the suction cup or is pulled towards it.

[0012] The invention thus provides a punching tool which simplifies the detachment of the workpiece from the cutting punch after it has been separated from the blister, particularly if the blister has an adhesive layer. While with conventional punching tools the force of a pick-and-place system must be sufficient to detach the workpiece from the cutting punch, the punching tool according to the invention generates an additional force which supports the detachment. If the pressure in the pressure chamber changes from negative pressure to positive pressure, this positive pressure causes the suction tube and thus the suction cup to move in the direction of the punching movement relative to the guide tube and thus relative to the cutting punch. This moves the suction cup out of the cutting punch so that the workpiece still resting on the suction cup is pushed away from the cutting punch.Secondly, the excess pressure is passed on to the suction cup via the suction pipe, so that the workpiece is pushed away from the suction cup. This blowing off by the suction cup is then carried out by a pick-and-place system such as an additional suction cup holder for easier transfer. By means of such a suction pipe as provided in the invention, which on the one hand ensures a pressure connection between the pressure chamber and the suction cup and on the other hand is moved by a pressure change in the pressure chamber, both the movement of the suction pipe and the blowing off via the suction cup in the punching tool can be realized without the need for two different pressure chambers or pressure connections. The function can be ensured with a single pressure connection. It should be noted that embodiments of the invention are also conceivable in which the guide tube can be designed as an integral component of the tool body.This means that the tool body and guide tube do not necessarily have to be two interconnected components, but can also be manufactured from a single piece. The guide tube can therefore be formed directly into the tool body. Preferably, however, the guide tube is provided as a separate component, for example, via a screw connection in a corresponding recess in the tool body. This allows for easy retrofitting of existing punching tools, as the guide tube and, accordingly, the suction tube can be inserted into existing tool bodies. Likewise, in the event of wear or a defect, the defective component can be replaced more easily.

[0013] In an advantageous embodiment of the invention, a nozzle is arranged on the suction pipe in such a way that a fluid flow, in particular of the working medium, passes exclusively via the nozzle from the pressure chamber into the suction pipe and vice versa. The working medium is to be understood as a gas in the pressure chamber, in particular air, which is made available via the pressure inlet in the pressure chamber. Since air is the most common working medium in such systems, “compressed air” is also referred to in the application as a synonym for a “working medium”. However, this is to be understood as any form of suitable working medium. The nozzle is preferably designed in such a way that when there is a change from negative pressure to positive pressure in the pressure chamber, the suction pipe first moves within the guide pipe and only then is positive pressure applied to the suction device.By providing a suitable nozzle as a connection between the pressure chamber and the suction pipe, and the resulting pressure drop in the suction pipe, it is possible to ensure that the movement that pushes the suction cup out of the cutting punch occurs first, before the excess pressure is applied to the suction cup and the workpiece is blown off the suction cup. This ensures that the release position, where the workpiece is picked up by a pick-and-place system, for example, is reached first, before the force required to secure the workpiece to the suction cup disappears.

[0014] Depending on the nozzle's cross-section, the pressure drop in the suction pipe and at the suction cup relative to the pressure chamber can be adjusted, thus determining the force with which the suction cup blows off the workpiece. Therefore, the nozzle preferably has an adjustable cross-section to allow for variable adjustment of the fluid flow of the working medium passing through the nozzle and thus the force used to blow the workpiece off the suction cup.

[0015] Preferably, the suction cup is furthermore firmly attached to the suction tube, in particular by means of a positive fit. Thus, a movement of the suction tube automatically also means a movement of the suction cup. A positive fit here represents a clean, easy-to-manufacture and easy-to-construct connection option. Furthermore, an embodiment is preferred in which the suction cup is made of an elastic material such as rubber or the like. In a further preferred embodiment of the invention, an anti-twist device is provided between the suction tube and the guide tube. This is designed to absorb any torque that may arise about the longitudinal axis of the suction tube, or the axis of the direction of movement of the suction tube during movement from the fixing position to the dispensing position, in order to thus prevent rotation of the suction tube in the guide tube.The anti-rotation device preferably comprises a guide element and a guide, which are arranged and designed to interact during movement of the suction pipe in the guide pipe in such a way that rotation of the suction pipe is prevented. In this case, either the guide element can be arranged in the guide pipe and the guide in the suction pipe, or the guide element can be arranged in the suction pipe and the guide in the guide pipe. The guide is understood to be a linear guide, which is designed such that the guide element is enabled only in a translational direction, namely in the direction of movement of the punching process (punching direction). In this way, a simple and cost-effective anti-rotation device can be ensured.

[0016] In a further preferred embodiment of the invention, the movement of the intake manifold within the guide tube is limited by at least one, particularly mechanical, stop. Stops allow the respective end positions of the intake manifold's movement to be clearly defined. They are simple to implement in terms of design and manufacturing technology and also offer a low failure rate and low maintenance requirements.

[0017] Preferably, the discharge position of the suction tube is defined by a lower stop on the guide tube interacting with a shoulder on the suction tube or the nozzle, and / or the fixation position of the suction tube is defined by an upper stop on the guide tube interacting with a projection on the suction tube. This allows both end positions of the suction tube's movement to be clearly specified.

[0018] A further preferred embodiment of the invention is one in which at least one of the stops is configured to define the discharge position or the fixation position of the suction tube within the anti-rotation device, particularly through the interaction of the guide and guide element. In this way, the anti-rotation device can define both the rotation of the suction tube and the end positions of its movement. This eliminates the need to provide different elements for both purposes, thus reducing design and manufacturing costs.

[0019] The method according to the invention for operating a punching tool, in particular according to one of the preceding claims, in a punching device comprises the following method steps.

[0020] Applying a vacuum to a suction device of the punching tool, in particular during a relative movement of a cutting punch to a cutting plate, such that a workpiece to be punched out is fixed with respect to the cutting punch of the punching tool, and

[0021] Applying an overpressure to a suction cup of the punching tool, in particular during a pick-and-place system picking up the workpiece after the relative movement of the cutting punch to the cutting plate, in such a way that the punched-out workpiece is blown off by the suction cup.

[0022] When the workpiece is held in place by the suction cup, it remains immobile on the suction cup. When it is blown off, the excess pressure in the suction cup generates a force that actively breaks the contact between the suction cup and the workpiece.

[0023] Advantageous aspects, developments, and examples of the invention are explained in more detail below with reference to the accompanying drawings. The figures show:

[0024] Fig. 1 shows the cross section of a punching device 1 in a perspective view.

[0025] Fig. 2a shows a punching tool 10 in an embodiment according to the invention in a first position before the separation process between workpiece 31 and blister 30.

[0026] Fig. 2b shows the punching tool 10 from Fig. 2a in a second position after the separation process between workpiece 31 and blister 30.

[0027] Fig. 2c shows the punching tool 10 from Fig. 2a in a third position for transferring the separated workpiece 31.

[0028] Fig. 2d shows the punching tool 10 from Fig. 2a in a fourth position in which it is ready for a next punching operation.

[0029] Fig. 1 shows a perspective cross-section of a punching device 1, which is intended, for example, for punching out chips for credit cards or other security-relevant documents. The punching device 1 has two parallel and synchronously operating punching tools 10. These are both designed in different embodiments, with the punching tool 10 on the left in the plane of the drawing corresponding to an embodiment of the invention, which will be discussed in more detail with reference to Figures 2a to 2d.

[0030] The punching tools 10 are immovably mounted on a base plate 60, which is guided by guide columns 61. The base plate 60 with the punching tools 10 can therefore be moved along the guide columns 61. The punching tools 10 are guided by corresponding recesses in a guide plate 70. A cutting plate 40 is arranged above the guide plate 70 and has two recesses 41 at the position of the punching tools 10. A gap is provided between the cutting plate 40 and the guide plate 70 at the level of the punching tool 10, into which gap the blister 30 is inserted. The workpieces 31 are connected to one another in the band-shaped blister 30 and are to be separated from the blister 30 by the punching device 1. For this purpose, the blister 30 is pushed into position so that two workpieces 31 are arranged exactly at the positions of the recesses 41 in the cutting plate 40 directly above the punching tools 10.

[0031] In this position, the base plate 60 moves upward, so that the punching tools 10, with the recesses 41 of the cutting plate 40, separate the workpieces 31 from the blister pack 30. The workpieces 31 are then picked up by a pick-and-place system 50 and moved upward out of the recesses 41 and transported to the right in the plane of the drawing in Fig. 1. During the separation process, the workpieces 31 are secured by a suction cup 12 (see Figs. 2a-2d). The securing takes place by means of the negative pressure of a working medium in the suction cup 12, which can be applied via a pressure connection 20. The exact function of the punching tools 10 will be discussed in more detail with reference to Figs. 2a to 2d.

[0032] These each show a punching tool 10 in an embodiment according to the invention in different positions, based on which a complete punching process for separating the workpieces 31 from the blister 30 is explained.

[0033] Fig. 2a shows the punching tool 10 in a first position prior to the separation process between the workpiece 31 and the blister 30. The blister 30 is inserted between the cutting plate 40 with the recess 41 and the guide plate 70, so that the workpiece 31 is arranged centrally in the recess 41 in the plane of the drawing in Fig. 1 above the punching tool 10. The punching tool 10 has a cutting punch 11, which is dimensioned such that it is formed opposite to the recess 41. The cutting punch 11 is firmly connected, in particular screwed, to a tool body 19. A pressure chamber 18 is provided in the tool body 19, which can be pressurized through a pressure inlet 17. The pressure chamber 18 contains the pressure-generating working medium, in particular air, which is provided from the pressure connection 20 on the punching device 1 (see Fig. 1) and from there reaches the pressure inlet 17 via corresponding pressure lines.

[0034] Furthermore, the punching tool 10 has a guide tube 14 which is firmly connected to the tool body 19 and in particular, as shown in Fig. 2a, is screwed thereto. Consequently, the guide tube 14 is immovable with respect to the tool body 19. Embodiments of the invention are also conceivable in which the guide tube 14 is designed as part of the tool body 19 and is not designed in two parts. The embodiment shown here, however, has the advantage that the guide tube 14 can be inserted into existing tool bodies 19 of conventional punching tools 10. Within the guide tube 14, a suction tube 13 is arranged so as to be movable along its longitudinal axis. The suction tube 13 can thus be moved up and down within the guide tube 14 in the plane of the drawing in Fig. 2a.Rotation of the suction tube 13 is prevented by an anti-rotation device 15, which is designed as a bolt positioned in a guide in the guide tube 14. On the upper side of the suction tube 13 in the plane of the drawing, a suction cup 12 is connected to the suction tube 13 by a positive fit. Therefore, if the suction tube 13 moves, the suction cup 12 also moves.

[0035] A nozzle 16 is arranged at the lower end of the suction tube 13 in the plane of the drawing. This nozzle is wider than the suction tube 13 and thus has a shoulder 162 which projects beyond the suction tube 13 in the radial direction, starting from the longitudinal axis of the suction tube. Furthermore, the nozzle 16 is designed to enable a fluid passage from the pressure chamber 18 into the suction tube 13, so that a working medium can pass from the pressure chamber 18 into the suction tube 13 and vice versa. The suction tube 13 is further fluidically connected to the suction device 12, so that an exchange of the working medium can also take place here. The suction device 12 is preferably made of a flexible material such as rubber or similar in order to be able to adapt as best as possible to the surface of the workpiece and to create the most tight connection possible to it.

[0036] In the position shown in Fig. 2a, a negative pressure, in particular a vacuum, is present in the pressure chamber 18. This negative pressure is also present at the suction device 12 itself due to the fluidic connection of the nozzle 16 to the suction tube 13 and from the suction tube 13 to the suction device 12. As a result, the workpiece 31 is drawn against the upper side of the cutting punch 11 and thus fixed in place. Therefore, in the context of the application, this position of the suction tube 13 relative to the guide tube 14, and thus also of the suction device 12 relative to the cutting punch 11, is referred to as a fixing position.

[0037] While maintaining the negative pressure on the suction cup 12, the entire punching tool 10 is moved from the position shown in Fig. 2a to the position shown in Fig. 2b

[0038] 10 upwards so that the cutting punch 11 is pressed through the recess 41 in the cutting plate 40. This creates a cutting edge between the cutting punch

[0039] 11 and cutting plate 40, so that the workpiece 31 is separated from the blister 30 along this cutting edge. The position of the punching tool 10 after this separation process is shown in Fig. 2b. The vacuum on the suction cup 12 and the associated fixation ensure that the workpiece 31 does not move during separation and that the cut is thus made at the desired location.

[0040] Depending on the composition of the blister 30, for example when using a hot melt adhesive, the workpiece 31 may become stuck to the surface of the cutting punch 11 during the separation process, making it difficult to remove it. To reliably and safely prevent this, the punching tool 10 is moved into the position shown in Fig. 2c. Overpressure is applied to the pressure chamber 18. This pressure acts against the pressure surface 161 of the nozzle 16 and, together with the suction tube 13 attached to it, pushes it upwards in relation to the guide tube 14 in the plane of the drawing until the shoulder 162 of the nozzle 16 abuts the guide tube 14, or more precisely, a lower stop 141 of the guide tube 14. Due to the movement of the suction pipe 13 in the punching direction of the punching tool 10, the suction cup 12 which is positively attached to the suction pipe 13 is also pushed upwards, whereby it protrudes from the surface of the cutting punch 11, while in the position shown in Fig.2b, was still flush with the latter, in order to pull the workpiece 31 onto the surface of the cutting punch 11. This releases the workpiece 31 from the cutting punch 11, so that there is no longer any contact. This position is depicted in Fig. 2c and is referred to in the application as the discharge position of the suction pipe 13.

[0041] The workpiece 31 continues to be held in place by the suction cup 12 during the movement of the suction tube 13. This is achieved via the nozzle 16, which is dimensioned such that there is a pressure drop in the suction tube 13 compared to the pressure chamber 18, so that the excess pressure is only applied to the suction cup 12 with a delay during the pressure change.

[0042] Once the suction pipe 13 with the suction cup 12 has reached the delivery position, the workpiece 31 is picked up by a pick-and-place system 50, which in the embodiment shown is also designed as a suction cup. The interaction between the pick-and-place system 50 and the suction cup 12, as well as the pressurization of the pressure chamber 18, is designed such that the suction cup 12 is subjected to overpressure as soon as the pick-and-place system 50 has taken over the workpiece 31. The overpressure in the suction cup 12 ensures that the workpiece 31 does not stick to the suction cup 12, but is blown off by it. The force with which the blowing off occurs is determined by the size of the opening from the nozzle 16 to the suction pipe 13.

[0043] Once the punched-out workpiece 31 has been removed by the pick-and-place system 50, the punching tool 10 is moved back down to its starting position in the plane of the drawing to clear the gap between the cutting plate 40 and the guide plate 70 for the blister 30, which is pushed forward accordingly until the next workpiece 31 to be removed from the blister 30 is positioned above the cutting punch 11. The pressure chamber 18 is again placed under negative pressure, causing the suction tube 13 with the suction cup 12 to move from the dispensing position back to the fixing position, as shown in Fig. 2d.

[0044] A projection 131 of the suction tube 13 serves as a stop for the fixation position, which interacts with an upper stop 142 of the guide tube 14—in the embodiment shown, its upper end. The projection 131 also serves as part of the positive connection between the suction cup 12 and the suction tube 13. LIST OF REFERENCE SYMBOLS

[0045] 1 punching device

[0046] 10 punching tools

[0047] 11 cutting punches

[0048] 12 suction cups

[0049] 13 Intake manifold

[0050] 131 lead

[0051] 14 Guide tube

[0052] 141 lower stop

[0053] 142 upper stop

[0054] 15 Anti-twist device

[0055] 16 nozzle

[0056] 161 printing area

[0057] 162 shoulder

[0058] 17 Pressure inlet

[0059] 18 pressure chamber

[0060] 19 tool bodies

[0061] 20 pressure connection

[0062] 30 blisters

[0063] 31 Workpiece

[0064] 40 cutting plate

[0065] 41 recess

[0066] 50 pick-and-place system

[0067] 60 base plate

[0068] 61 Guide column

[0069] 70 guide plate

Claims

PATENT CLAIMS 1. Punching tool (10) for punching out a workpiece (31) from a blister (30), comprising a cutting punch (11) which is connected to a tool body (19) and is designed to be moved relative to a cutting plate (40) such that the workpiece (31) is punched out of the blister (30), a suction device (12) designed to fix the workpiece (31) by means of negative pressure at least during the movement of the cutting punch (11), a guide tube (14) which is fastened in the tool body (19), a pressure chamber (18) with a pressure inlet (17) which is formed in the tool body (19), a suction tube (13) which projects through the cutting punch (11) and is designed to establish a fluidic connection between the suction device (12) connected to the suction tube (13) and the pressure chamber (18), wherein the suction tube (13) is arranged within the guide tube (14) is arranged to be movable in the direction of movement of the cutting punch (11) and is designed toin the event of an overpressure in the pressure chamber (18), to be moved by it into a dispensing position and in the event of a negative pressure in the pressure chamber (18), to be moved by it into a fixing position.

2. Punching tool (10) according to the preceding claim, wherein a nozzle (16) is arranged on the suction pipe (13) in such a way that a fluid flow passes exclusively via the nozzle (16) from the pressure chamber (18) into the suction pipe (13) and vice versa.

3. Punching tool (10) according to the preceding claim, wherein the nozzle (16) has an adjustable cross-section designed to adjust a fluid flow passing through the nozzle (16).

4. Punching tool (10) according to one of the preceding claims 2 or 3, wherein the nozzle (16) is designed such that when there is a change from negative pressure to positive pressure in the pressure chamber (18), the suction tube (13) initially moves within the guide tube (14) and then the positive pressure is applied to the suction device (12).

5. Punching tool (10) according to one of the preceding claims, wherein the suction cup (12) is fastened to the suction tube (13) by means of a positive fit.

6. Punching tool (10) according to one of the preceding claims, wherein an anti-twist device (15) is provided between the suction tube (13) and the guide tube (14), wherein the anti-twist device in particular comprises a guide element and a guide, which are arranged and designed to cooperate during a movement of the suction pipe (13) in the guide pipe (14) in such a way that rotation of the suction pipe (13) is prevented.

7. Punching tool (10) according to one of the preceding claims, wherein a movement of the suction tube (13) within the guide tube (14) is limited by at least one stop.

8. Punching tool (10) according to the preceding claim, wherein the discharge position of the suction tube (13) is defined by a lower stop (141) on the guide tube (14) in interaction with a shoulder (162) on the suction tube (13) or the nozzle (16), and / or the fixing position of the suction tube (13) is defined by an upper stop (142) on the guide tube (14) in interaction with a projection (131) on the suction tube (13).

9. Punching tool (10) according to the preceding claims 5 and 6, wherein the at least one stop is formed within the anti-rotation device (15), in particular by the interaction of guide and guide element.

10. Method for operating a punching tool (10), in particular according to one of the preceding claims, in a punching device (1) comprising the following method steps: (A) applying a vacuum to a suction device (12) of the punching tool (10), in particular during a relative movement of a cutting punch (11) to a cutting plate (40), such that a workpiece (31) to be punched out is fixed with respect to the cutting punch (11) of the punching tool (10), and (B) Applying an overpressure to a suction device (12) of the punching tool (10), in particular during a pick-and-place system (50) picking up the workpiece (31) after the relative movement of the cutting punch (11) to the cutting plate (40), such that the punched-out workpiece (31) is blown off the suction device (12).

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