EP2061610B1 - Punching device and method for punching - Google Patents

Description

The invention relates to a punching device for cutting blanks from a band-shaped material passed intermittently through the punching device, with a rotatably mounted around an axis perpendicular to the conveying plane of the material and a rotatably mounted die, a arranged below the die transport device for removing the boards from the punching device and means for aligning the boards in a desired for further processing end position. Moreover, the invention relates to a method for cutting boards.

When punching blanks of strip-shaped material, in particular a sheet-metal strip, there is a desire to maximize the utilization of the material and reduce waste, the so-called waste, to a necessary minimum. It is therefore endeavored in the cutting of boards so that the cut edges of two adjacent boards are as close to each other.

In addition to the use of a double tool, it is already known to cut out the boards in the so-called turning cut. Optimum utilization of the sheet metal strip can not be achieved by these methods.

The DE 2 233 350 A1 discloses according to the preamble of claim 1 already a cutting device for a press for cutting blanks from an intermittently guided through the tool strip or strip-shaped material, such as sheet metal strip. In order to utilize the sheet metal strip to the maximum and reduce waste, the tool is rotatably mounted in the press about an axis perpendicular to the conveying plane of the sheet metal strip axis. The range of rotation of the tool is preferably 180 °. The Tool lower part is mounted on a well-known manner on the press table arranged Schnittauflagekasten, on which another, the die holder and the die carrying turntable is mounted. To remove the boards from the tool a known gripper rail transport device is provided. Finally, it is disclosed that the cutting device is connected downstream of a board alignment station known per se, for example a turntable.

The cut out by the punch of the tool board falls under the action of a separately provided Platinenausstoßers by a recess of the die holder, the turntable underneath and the stationary lower tool part on the Schnittauflagekasten. On the Schnittauflagekasten the punched board is detected by correspondingly shaped on the gripper rails driving pin and transported out by the gripper rail transport device from the discharge channel of the device and fed to the downstream board alignment station. The turntable of the board alignment station is rotatable in two directions, so that the successively incurred in different layers boards can be rotated in a certain same end position for further transport.

To cut boards in two staggered rows, the tool is arranged eccentrically to the axis of rotation of the turntable. Depending on the particular board shape and the eccentricity of the turntable of the board alignment station must not only rotated by different angles, but also experience an additional linear transverse displacement.

A disadvantage of the known device is that due to the shape of the punched board Only defined rotational angle of the cutting device and the corresponding die are allowed on the gripper rails mounted driving pin, so that the boards can be correctly absorbed by the gripper rail transport device. Furthermore, unbalanced circuit boards can not be transported.

Another disadvantage is that the ejected board falls down under the action of the Platinenausstoßers, so that the punched board is not always taken by the driving pin of the gripper rail transport device in the defined position. In these cases, the reverse rotation on the turntable of the blank alignment station, which is always at a constant angle, is erroneous. This has the consequence that such boards can not be correctly rotated to the desired end position for further processing. Finally, cutting in staggered rows is limited and not possible under optimal utilization of the band-shaped material.

From the GB 1 193 666 A is a punching device for a press for the alternate cutting out of boards in two rows of a metal strip known. The sheet metal strip is advanced gradually. To alternately cut the boards, the cutting frame is periodically reciprocated at right angles to the tape feed. For the punching stroke in the first row, the cutting frame is moved to a first end position and for the punching stroke in the second row to the other end position. The cut-out boards are processed in a subsequent machine.

In order to form such a punching device with a perpendicular to the tape feed back and forth cutting frame so that even with any board shapes optimal utilization of the metal strip at only once Passage of the sheet metal strip is possible, it is proposed in this document that the cutting frame each having a number of associated cutting devices, of which, however, only one in the said end position on the belt is movable. The sheet metal strip does not have to be passed twice through the machine as two cuts are made one after the other in a row. In the predominantly occurring in practice cases in which only a single board shape is to be punched, the two cutting devices are the same design and arranged on the cutting frame rotated by a fixed angle to each other, for example, at a fixed angle of 180 ° in the cutting frame.

The thus configured punching device may be followed by a rotating device for the punched-out boards, which rotates the boards so that they are all in one direction. In this case, either each board can be rotated by a fixed angle or else the turning device only engages on every second board in order to turn it into the position that has the first board.

The lower tools of the cutting devices have recesses through which the punched-out boards fall down onto a transport device, which transports the punched-out boards to the described rotary device. By falling down the boards are not in a defined position, so that the exact reverse rotation at a fixed angle is also not always guaranteed correctly.

Starting from the DE 2 233 350 A1 As the closest prior art, the invention is based on the object, a. Punching device of the type mentioned, in particular to provide for irregularly shaped boards, which without affecting the transfer of the board to the transport device any angle of rotation of the tool allowed. Furthermore, a stamping process should be specified in order to achieve this goal.

This object is achieved in a punching device of the type mentioned above in that the punching device has a sinker for immediate acquisition of each board after cutting and for transfer to the transport device and the sinker to a parallel to the axis of the punch and die axis to coincident rotation angle as the punch and the die is rotatably mounted and movable in the axial direction. In relation to a starting position, the punch, die and sinker can be rotated in particular by up to +/- 180 °.

As a result of the immediate acquisition of each board after cutting by the sinker it is avoided that the cut-out board drops onto the transport device and thereby undergoes a change in position. Furthermore, the upstream of the transport device board Holer ensures that the cut board can be transferred regardless of the respective cutting position of the punch and die in always the same orientation of the sinker to the transport device. The sinker is rotatable about a parallel to the axis of the punch and die axis to match rotational angles as the punch and the die and mounted movable in the axial direction. Through the controlled picking up and turning of the punched-out blanks in an always same transfer position to the transport device, this can be equipped with exactly adapted to the respective board shape holding elements, such as gripper jaws, which allow safe and gentle handling of the boards.

As a result of the present invention undisturbed transfer of the punched boards to the transport device any angle of rotation of the tool are possible, so that the ribbon material, especially when cutting out of irregularly shaped boards make the best possible use. In particular, when between the tool and the band-shaped material transverse to the feed direction in addition a relative movement is possible, can be achieved by selective rotation of the tool optimal nesting of the cuts across the width and length of the band-shaped material. The relative movement is preferably achieved in that a feed device moves the band-shaped material intermittently through the punching device and the feed device is arranged to move back and forth perpendicular to the tape feed. In principle, however, it is also possible to move the tool, including the sinker, transversely to the feed direction. Due to the high masses to be moved, however, the movement of the feed device is to be preferred.

Due to the rotation of the sinker between two successive cuts by the same angle and in the same direction as punch and die, eliminates the need for a translational movement of the board in addition to the reverse rotation in the desired end position when using the device according to the invention even with irregularly shaped boards onward transport, as required in the prior art alignment stations.

For structural reasons, in particular to avoid complex gearboxes extending over the tool lower and upper parts, at least one rotary drive is assigned to the punch, the die and the blank holder.

To be able to comply with the required for many boards low cutting gaps, a high positioning accuracy between the punch and die is required, which is preferably achieved in that both the punch and the die are each associated with two acting on a connected to the punch or the die drive wheel drives. The drive wheel can be designed, for example, as a worm wheel meshing with two screw shafts, each worm shaft being driven by a separate servomotor. The first servo motor drives the desired rotational position of the punch or die, while the second servo motor, without reaching the rotation of the worm wheel, maintains a torque on the worm wheel after reaching the desired rotational position, so that there is no play between the worm wheel and the two worm shafts affecting the cutting gap occurs. Alternatively, it is possible to mechanically lock the punch and the die together in order to be able to comply with a small cutting gap and without the need for two drives for punch and die each. The locking can be done for example by means of indexing pins, the punch and die in the direction of rotation about their axes of rotation form-fitting in a region adjacent to the continuous band-shaped material.

The rotary drives are preferably synchronized, so that punch, die and sinker are twisted in particular at the same time by matching rotation angle.

The sinker is structurally advantageous arranged on a rotatable about the axis of rotation of the sinker roller body, which is arranged in a stationary frame, in particular on the transport device. By this design measure, the frame of the transport device can also serve as a frame for the sinker, which is to be arranged anyway for the transfer of the boards in the sphere of the transport device.

The die has a certain insertion depth for the punch. However, in order to be able to take over the punched-out board immediately after cutting, the support surface of the sinker is dimensioned so that it can dip from below into the free cross-section of the die. To fix the acquisition of the board holding means, such as magnets and / or vacuum suction can be arranged in the surface of the sinker. However, for a quick reverse rotation and vertical movement of the board, the holding means on the sinker itself are not sufficient, but require additional fixation of the board on a larger area. In terms of design, this is essentially achieved in that the actual sinker is arranged on a pilot drive which carries out a relatively short stroke up to a support plate surrounding the sinker, while a further drive for the longer main lift of the sinker lowered to the level of the support plate responsible for. A preferred constructive solution is that on a reel body rotatably disposed a first in the direction of the axis of rotation of Platinenholers movable linear drive whose output is connected to a holder for a support plate and a second linear drive, wherein the sinker mounted on the output of the second linear drive and the support plate has a passage which surrounds the sinker in the lower end position of the second linear drive. The first in the direction of the axis of rotation movable linear drive performs the main stroke of the sinker and brings the support plate to just below the die, while the second linear actuator, the pilot cylinder causes the short stroke of the sinker within the die until just at the bottom. After the immediate adoption of the board of the pilot cylinder is moved to its lower end position in which the support plate surrounds the support surface of the sinker and thus the punched board offers an overall larger contact surface.

Due to the synchronous rotation of the sinker to coincident rotation angle such as punch and die, the board can be fixed in the correct position on the support plate by along the contour of the board mounted driving pins. In particular, when the downstream of the sinker transport device works with grippers, these drive pins are lowered below the surface of the support plate to allow unhindered detection of the boards by means of effective in the board plane gripper.

The grippers which are movable towards and away from one another are preferably fastened to two parallel support elements, in particular gripper rails, which are connected to a step-by-step drive. The step drive for the support elements is located on the frame of the transport device, on which preferably also the roller body of the sinker is arranged. The roller body is located between two mutually towards and away from each other movable grippers on one of the two end faces of the two parallel support members.

The rotational movement of punch, die and transfer tool and the feed of the strip-shaped material and optionally the movement of the feed device transverse to the feed direction are preferably controlled by a program that ensures optimal nesting of the boards on the strip-shaped material. After a one-time programming of the rotational movements between successive cutting operations and optionally the corresponding transverse movement of the band-shaped material, the optimal nesting for a particular blank to be cut out can be based on a specific one stored band-shaped material and recalled at any time via the program control.

Figur 1

eine perspektivische Gesamtansicht einer erfindungsgemäßen Stanzvorrichtung,

Figur 2

einen Schnitt durch die erfindungsgemäße Stanzvorrichtung nach Figur 1,

Figur 3

eine Detailansicht eines Platinenholers einer Stanzvorrichtung nach Figur 1,

Figur 4

einen Schnitt längs der Linie A-A nach Figur 3,

Figur 5

eine perspektivische Ansicht einer Transportvorrichtung mit darin integriertem Platinenholer nach Figuren 3 und 4,

Figur 6

eine Seitenansicht der Transportvorrichtung nach Figur 5,

Figur 7

einen Schnitt durch die Transportvorrichtung längs der Linie A-A nach Figur 6.

Figur 8

eine perspektivische Gesamtansicht der erfindungsgemäßen Stanzvorrichtung in Ein - und Auslaufrichtung des Blechbandes.

The invention will be explained in more detail with reference to an embodiment of a punching device according to the invention. Show it

FIG. 1

an overall perspective view of a punching device according to the invention,

FIG. 2

a section through the punching device according to the invention FIG. 1 .

FIG. 3

a detailed view of a sinker of a punching device according to FIG. 1 .

FIG. 4

a section along the line AA after FIG. 3 .

FIG. 5

a perspective view of a transport device integrated therein with PCB Holer FIGS. 3 and 4 .

FIG. 6

a side view of the transport device according to FIG. 5 .

FIG. 7

a section through the transport device along the line AA after FIG. 6 ,

FIG. 8

an overall perspective view of the punching device according to the invention in the inlet and outlet direction of the sheet metal strip.

FIG. 1 shows an overall perspective view of a punching device (1) according to the invention, which has a tool top and bottom part (2,3), which are spaced from each other by two lateral connecting parts (4 a, b). By the passage formed between the lateral connecting parts (4 a, b) and the upper and lower tool parts (2, 3) becomes the passage only in FIG. 8 shown strip-shaped material in the form of a sheet metal strip (5) by a feed device (6) intermittently moved through. The feed device (6) can be moved back and forth on two rails (7) transversely to the feed direction by means of a drive (8) in order to produce a zig-zag cut in the sheet-metal strip (5). The feed device (6) is arranged together with the rails (7) and the drive (8) on a support plate (9) which is supported by brackets (10) on a frame (11) for the punching device (1).

The feed device (6) is arranged by two in the housing of the feed device (6), in FIG. 1 not visible counter-driven rollers formed in the nip, the sheet metal strip is guided. At the level of the nip is in the housing of the feed device (6) one of the width of the sheet metal strip corresponding slot (12) on the input and on the opposite outlet side. The slot (12) of the feed device (6) is located at the height level of the cutting support (13) of the lower tool part (3), in which the die (14) with the die holder (15) are rotatably mounted. In the opposite upper tool part (2) of the punch holder (16) with the therein in the axial direction (25) movably arranged punch (17) is rotatably mounted.

Under the lower tool part (3) of the punching device (1) there is a transport device, designated overall by (18), with which the blanks (19) stamped out of the sheet metal strip (5) are not shown transversely to the feed direction of the sheet metal strip below the lower tool part (3) a downstream, in FIG. 1 Be promoted further processing station, not shown. Between the transport device (18) and the Die (14) in the tool lower part (3) is located in FIG. 1 invisible, in the transport device (18) integrated sinker (20) with which the boards (19) taken immediately after cutting and regardless of the cutting position of punch (17) and die (14) in always the same orientation of the sinker ( 20) are transferred to the transport device (19). The arrangement of the in the transport device (18) integrated sinker (20) below the lower tool part (3) shows the sectional view FIG. 2 , The same orientation of the irregularly shaped sinkers (19) is in FIG. 1 recognizable.

In the tool upper part (2) is as out FIG. 2 recognizable, the hollow cylindrical punch holder (16) rotatably mounted (22). The punch holder (16) has in the upper region a flange ring (23) which is supported on the upper tool part (2). A worm wheel (26) is non-rotatably connected to the flange ring (23) via screw connections, which in turn is in engagement with two worm shafts (27, 28). The worm shafts (27,28) are double-sided, as in particular from FIG. 1 recognizable, rotatably mounted in bearing blocks (31,32) and connected at the inlet side of the punching device (1) each with a servo motor (29) or (30). The servo motors (29,30) are flanged to one of the two side cheeks (33,34) of the upper tool part (2). Arranged on the flattenings of the side cheeks (33, 34) arranged parallel to one another in the upper region is a support plate (35) for receiving the drive (37) for a cutting ram (36).

At the lower end side of the cutting plunger (36) an adapter (38) for in the axial direction (25) positively receiving a end widening actuating flange (39) is mounted, which in turn is screwed to the punch (17). As a result of in the axial direction (25) positive connection between the adapter (38) and actuating flange (39), the forces acting in the axial direction of the cutting rod (36) can be transmitted without affecting the rotation of the associated with the actuating flange (39) punch (17). The axially displaceable in the punch holder (16) punch (17) is in the rotational direction about the axis (25) positively connected to the punch holder (16), so that the punch (17) completes each rotational movement of the punch holder (16). At the lower edge of the punch holder (16) the punch (17) surrounding a hold-down (40) is arranged, which presses the sheet metal strip (5) during the cutting of the boards (19) along the cut edge against the cut support (13).

To stabilize the rotational movement of the punch holder (16), a radial bearing (41) is arranged between a peripheral web (42) on the punch holder (16) and a bearing receptacle (43) extending downwards from the underside of the upper tool part (2).

In the tool lower part (3), the die holder (15) is rotatably mounted in a horizontal support region (44), which is embedded in the tool lower part (3). The die holder (15) is bolted to its lower side opposite the die (14) with a worm wheel (45), which in turn meshes with two worm shafts (46, 47) running in through-holes of the tool lower part (3). The worm shafts (46,47) are frontally connected to two independent servomotors, which, however, are in FIG. 1 are not shown in order not to obscure the view of the feed device (6). Visible, however, are the front side of the tool lower part (3) arranged openings of the through holes for receiving the worm shafts (46,47.

Opposite of the worm wheel (45), the die (14) is embedded in the die holder (15). Die (14) has starting from the cutting support (13) over one of their height corresponding sinking depth (48) for the punch (17) during the cutting of the boards (19).

The in the axial direction (25) reciprocally movable and about the axis (25) rotatable Platinenholer (20) takes over in the plane of the cut support (13) cut-out board (19) immediately after cutting, in which the sinker (20) is moved up to the bottom of the metal strip (5). How out FIG. 2 recognizable, the sinker (20) is in extension of the axis of rotation (25) of the punch (17) and die (14) below a passage (49) in the lower tool part (3).

The structure of the sinker (20) and of its drive around and in the direction of the axis (25) is best described by the FIGS. 3 and 4 clarifies: In order to mount the sinker (20) rotatable and movable in the axial direction (25), the sinker is attached to the output of a pilot cylinder (50) whose piston rod is in FIG. 4 in its lower, retracted end position. Out FIG. 4 It can also be seen that the sinker (20) has a central throughbore (52) which widens toward the surface (51) of the sinker (20). A holding vacuum is applied to the surface (51) of the sinker (20) via the central throughbore (52) in order to fix the sinkers (19) after they have been cut out. The Pilotzylinder (50) is connected with its the sinker (20) opposite end to the output of another linear drive, the main hub cylinder (54), which also receives a holder (53), at its upper end a horizontal support plate (55) is arranged, which has a central, circular cylindrical passage (56) which holds the sinker (20) in the in FIG. 4 illustrated lower end position of the piston rod of the pilot cylinder (50) surrounds and with the surface of the sinker (20) forms a flat support surface for the cut-out boards.

The main lifting cylinder (54) is in turn arranged on a hollow cylindrical roller body (57) which is rotatably mounted in the stationary frame (60) of the transport device (18). The bearing (58) is located between the on the outer circumference of the roller body (57) and on the frame (60) of the transport device arranged bearing rings (59). Below the bearing (58), the roller body (57) is surrounded by a rotatably connected to him race (61) which is connected via a belt (62) with a rotary drive (63) of the belt transmission (see. Figures 5 . 7 ).

The annular wall (64) of the roller body (57) is provided in the axial direction (25) on two diametrically opposite sides with guide sleeves (65) which extend over the entire height of the roller body (57). The guide sleeves accommodate in the outer edge region of the support plate (55) mounted vertically downwardly extending guide rods (66) to ensure proper vertical guidance of the support plate (55) and the holder (53) and the pilot cylinder (50).

FIGS. 5 and 6 illustrate the installation situation of the sinker (20) in the transport device (18). The sinker (20) is located at the beginning of the transport path of the transport device centrally below the passage (49) in the tool lower part (2) (see. FIG. 2 ). On the side next to the sinker (20), the rotary drive (63) is fastened to a holder (68) fastened to the underside of the frame (60). In the lower end position of the main hub cylinder (54) with retracted pilot cylinder (50) is the support plate (55) together with the sinker (20) in a plane slightly above the surface (69) of Rack (60) to allow the interaction with grippers (71) of the transport device (18).

The transport device (18) has two gripper rails (72) connected to a step drive (70), on which the grippers (71) are arranged at a distance of the step length of the step drive (70). In each case two grippers (71) arranged opposite one another on the parallel gripper rails (72) have mutually movable gripper jaws (73) which are actuated by corresponding linear drives in the grippers (71). The two gripper rails (72) are centrally coupled via a transverse strut (74) and connected to the step drive (70) via a driver (75) which extends in a vertical direction downwards through a longitudinal slot (76) in the frame (60). connected. The stepper drive (70) has a shaft (77) for axially driving a sleeve (78) to which the driver (75) is attached. As a result, the axial movement of the stepper drive (70) on the driver (75) on the crossbar (74) and thus the two gripper rails (72) is transmitted. As in particular from FIG. 6 and 7 As can be seen, the gripper rails (72) guided on at the bottom of the gripper rails, rotatable about vertical axes notch rollers (79) on horizontal, in the notches of the notch rollers (79) engaging rails (80).

The boards (19) are conveyed by the amount in the transport direction (67) first pair of grippers (71) by the amount of one step length in the transport direction and then detected by the arranged at a distance of a step length second and each further pair of grippers and each by step length to Handover further transported. At the end of the transport path, for example, the transfer to a forming station. Between the individual transport steps by means of the gripper pairs, the blanks (19) are arranged on a center, in each case between the two grippers (71). arranged transport bar (81) arranged, the surface of which is in the amount of coming into contact with the board portions of the gripper jaws (73). Also, the surface of the sinker (20) and the surrounding support plate (55) are during the transfer of the boards (19) to the transport device (18) at the height of the surface of the transport bar (81), so that the boards in height the contacting with them reaching portions of the gripper jaws (73) are located.

The support plate (55) moreover has openings (82) which are matched to the shape of the blanks (19) to be punched out and for which driving pins which can be lowered below the surface of the support plate (55). In FIG. 5 Only the openings (82) are recognizable, while the follower of the contour of the board (19) are already lowered for the transfer and the further transport of the punched-out board (19). For the transfer to the transport device (18) subsequent acquisition of a punched board (19) the gripper jaws (73) of the gripper (71) are moved back, so that the support plate (55) with the sinker (20) into the passage (49) in the tool lower part (3) can be moved to just below the die (14). Since the diameter of the support plate (55) is too large to drive into the die (14), the relatively short residual path is covered by the Pilotzylinders (15), the diameter of the substantially smaller sinker (20) directly to the Bottom of the board (19) introduces. The sinker (20) takes over with the help of the negative pressure, the punched board and places it after retraction of the pilot cylinder (50) on the support plate (55) between the temporarily extended driving pin from. The plate (19) fixed by the bolts on the support plate (55) allows a rapid rotation of the roller body (57) about the axis (25) to the board (19) in the in Figures 5 . 7 shown lower end position of the support plate (55) in the correct position to pass to the gripper (71).

The operation of the punching device (1) is as follows:

The strip-shaped material (5) is intermittently passed through the punching device (1) on the cutting support (13) by means of the feed device (6), the material being movable between two successive cuts at right angles to the belt advance, so that in conjunction with the belt advance a zig-zag arrangement of the cuts results in which the cuts can be made laterally and optionally offset in the feed direction of the tape against each other in two or more rows. Such a multi-row cut under optimal utilization of the strip-shaped material is, for example, in FIG. 8 recognizable. The remainder of the sheet-metal strip (5) leaving the punching device (1) after punching out shows the cut edges of the sinkers (19) lying close to one another. The blend is very low due to the nesting of the cuts, especially because punch (17) and die (14) in successive cuts by synchronous turning different cutting positions based on a starting position of the punch and die occupy, the sinker (20) between two successive following cuts about its axis of rotation (25) by the same rotation angle and in the same direction of rotation as punch (17) and die (14) is rotated. As a result of the particular synchronous rotation of the die, punch and sinker plate ensures that by reversing the die, punch and sinker to a matching angle of rotation always the same starting position is reached, so that the board (19) regardless of the respective cutting position of the punch (17 ) in always the same orientation of the sinker (20) to the downstream transport device (18) can be passed.

With the device according to the invention it is therefore possible, in several rows next to each other and at random angles of rotation to arrange the blanks to be punched out on the sheet metal strip while minimizing the waste (cf. FIG. 8 , right) and yet ensure the transfer of punched boards in the same orientation. <B> LIST OF REFERENCES </ b> No. description No. description 1. punching device 42nd web Second Upper die 43rd bearing seat Third Tool part 44th support area 4.a, b lateral. connecting parts 45th worm 5th metal strip 46th worm shaft 6th feeder 47th worm shaft 7th rails 48th sinking depth 8th. drive 49th passage 9th support plate 50th pilot cylinder 10th consoles 51st Platinenholer surface 11th frame 52nd perforation 12th slot 53rd bracket 13th average circulation 54th Main lift cylinders 14th die 55th platen 15th die holder 56th central passage 16th stamp attitude 57th roller body 17th stamp 58th storage 18th transport device 59th bearing ring 19th boards 60th frame 20th Platinenholer 61st race 21st ----- 62nd belt 22nd storage 63rd rotary drive 23rd flange 64th annular wall 24th ----- 65th guide sleeves 25th axis of rotation 66th guide bars 26th worm 67th transport 27th worm shaft 68th Bracket rotary drive 28th worm shaft 69th surface 29th servomotor 70th step drive 30th servomotor 71st grab 31st bearing blocks 72nd gripper rails 32nd bearing blocks 73rd gripper jaws 33rd side cheek 74th crossmember 34th side cheek 75th takeaway 35th support plate 76th long slot 36th cutting plunger 77th wave 37th drive 78th shell 38th adapter 79th notching rollers 39th actuating flange 80th rails 40th Stripper plate 81st transport bar 41st radial bearings 82nd openings

Claims (16)

1. A punching device for cutting out circuit boards from a ribbon-shaped material that is guided intermittently through the punching device, comprising a punch that is rotatably mounted about an axis positioned perpendicular to the conveying plane of the material, and having a rotatably mounted die, a transport device disposed below the die for removing the circuit boards from the punching device as well as means for aligning the circuit boards in an end position desired for a further processing, characterized in that the punching device (1) has a circuit board holder (20) for the direct receipt of each circuit board (19) after cutting out and for transfer to the transport device (18) and the circuit board holder (20) is mounted so that it can be rotated about an axis (25) parallel to the axis of rotation (25) of punch (17) and die (14) by the same angle of rotation as the punch and the die and is movable in the axial direction (25).
2. The punching device according to claim 1, characterized in that the punch (17), the die (14) and the circuit board holder (20) are each assigned at least one rotary drive (29, 30).
3. The punching device according to claim 2, characterized in that the punch (17) is assigned two drives (27, 28, 29, 30) acting on a drive wheel (26) connected to the punch and that the die (14) is assigned two drives (46, 47) acting on a drive wheel (45) connected to the die.
4. The punching device according to any one of claims 2 or 3, characterized in that the rotary drives of punch (17), die (14) and circuit board holder (20) are synchronized.
5. The punching device according to any one of claims 2 to 4, characterized in that the circuit board holder (20) is disposed on a roller body (57) which is rotatable about the axis of rotation (25) of the circuit board holder, which is mounted in a fixed frame (60).
6. The punching device according to claim 5, characterized in that a first linear drive (54) which is movable in the direction of the axis of rotation (25) of the circuit board holder (20) is disposed in a torque-proof manner on the roller body (57), the output whereof is connected to a holder (53) for a support plate (55) and a second linear drive (50), wherein the circuit board holder (20) is fastened at the output of the second linear drive (50) and the support plate (55) has a passage (56) which surrounds the circuit board holder (20) in the lower end position of the second linear drive (50).
7. The punching device according to claim 6, characterized in that guide elements (65, 66) for guidance of the translational movement of the support plate (55) are disposed on the roller body (57).
8. The punching device according to claim 5, 6 or 7, characterized in that the roller body (57) is disposed on the transport device (18).
9. The punching device according to any one of claims 6 to 8, characterized in that driving pins are attached to the support plate (55) along the contour of the circuit board (19).
10. The punching device according to claim 9, characterized in that the driving pins can be recessed below the surface of the support plate (55).
11. The punching device according to any one of claims 1 to 10, characterized in that the transport device (18) comprises two parallel support elements (72) connected to a stepwise operating drive (70) on which grippers (71) which are movable towards one another and away from one another are disposed at the spacing of the step length of the step drive (70).
12. The punching device according to any one of claims 1 to 11, characterized in that a feed device (6) moves the ribbon-shaped material (5) intermittently through the punching device (1) and the feed device (6) is disposed to that it is moveable to and fro at right angles to the strip advancement.
13. The punching device according to claim 12, characterized in that the rotary movements of punch (17), die (14) and circuit board holder (20) and the advancement of the ribbon-shaped material as well as the movement of the feed device (6) transversely to the direction of advancement are controlled by a program.
14. A method for cutting out circuit boards from a ribbon-shaped material that is guided intermittently through the punching device comprising a punch that is rotatably mounted about an axis positioned perpendicular to the conveying plane of the material, and having a rotatably mounted die, wherein punch and die occupy different cutting positions relative to an initial position through synchronous rotation in order to reduce the offcuts when cutting out circuit boards, characterized in that the circuit boards (19) are received by a circuit board holder (20) directly after cutting out and are transferred from the circuit board holder to a transport device (18) regardless of the respective cutting position always in the same orientation.
15. The method for cutting out circuit boards according to claim 14, characterized in that the circuit board holder (20) is turned between every two successive cuts about its axis of rotation (25) by the same angle of rotation and in the same direction of rotation as punch (17) and die (14), wherein the axes of rotation (25) of punch, die and circuit board holder are disposed parallel to one another.
16. The method for cutting out circuit boards according to claim 14 or 15, characterized in that the ribbon-shaped material (5) moved intermittently through the punching device (1) is moved at right angles to the strip advancement between two successive cuts.

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