EP1932634A2 - Method for positioning cutters of a cutter device and corresponding cutting device - Google Patents

Abstract

To position the cutting blades (11) of a cutting machine, to cut web materials into strips, all the blades are pushed on their shaft (9) by a push unit (13U) against a limit stop (15) into a supply zone (17). The length (MGL) of the stacked blades is determined and the number of blades in the stack is established by the stack length. The position of the blade grips is registered for the push unit for positioning along the shaft as they are drawn out of the supply zone.

Description

The invention relates to a method for positioning knives of a cutting device which cuts horizontally oriented web material into strips by means of at least one pair of divider blades having a plate-shaped upper blade on a harmonic and an associated lower blade contacting the upper blade on a lower shaft.

The invention further relates to a cutting device for carrying out the method and for cutting horizontally directed passing web material in strips by means of at least one pair of divider blades having on a harmonic a plate-shaped upper blade and on a lower shaft an associated, the upper blade cuttingly touching lower blade.

From the DE 100 23 210 A1 Such a cutting device is known in which the knives are positioned as described below. First, the knives are pushed by hand in about a desired position. A sensor of a displacement device detects the actual position of the blades arranged on the shaft by means of methods along the corresponding upper or lower shaft on which the blades are arranged. A controller controls the displacement device following so that each knife is pushed from its current position to the corresponding target position. Since not only the respective desired position of the knives can be specified in the control via the programming, but also the characteristic design data of the knives used can be taken into account, the sensor always detects the most important position, namely the position of the cutting edge of the knife immediately possible. The displacement device has engagement means, for example in the form of displaceable or pivotable Mitnehmfingern, the at Depending on the design, engagement can take place either on the contact surface defined by the cutting edge and / or on the contact surface defined by the back edge, but also on the peripheral surface in a form-fitting or frictionally engaged manner.

A disadvantage of the known method is that the knives are pre-positioned on the shaft by hand, whereby a considerable risk of injury is given.

A disadvantage of the displacement device of the cutting device is that the fingers of the displacement device for a system are designed both on a front and rear side surface of a knife in the displacement direction, resulting in a relatively complex control of the displacement device, which must take into account the respective type of engagement.

The object of the present invention is therefore to provide a method for positioning knives of a cutting device and an associated cutting device, by the setting accuracy and safety is increased with a shorter set-up time, and to provide a displacement device having a simpler structure.

This object is achieved on the method side in a generic method by: a) arranging a number of knives on a shaft, b) moving all the knives by means of a driver against a stop, so that they are arranged side by side in a storage area of the shaft and abut each other, c) determining a width of the adjacent knives in the storage area along the shaft (total knife width), d) calculating the number of knives in the storage area by means of the total knife length and calculating the location of entrainment operations of each knife designed to co-operate with the takeaway; to properly position them along the shaft; and e) positioning the knives on the shaft by sliding them out of the storage area along the shaft to a desired position by means of the follower.

Advantageously, the knives are pushed onto the shaft by hand in step a).

Preferably, a last pushed onto the shaft knife is aligned with a mark, so that the driving engagement of this knife is located at a defined position on the shaft for engagement with the driver.

Preferably, a drive is used with a torque limit to be turned on and in step b) a noticeable standstill and / or a displacement force measured by a pressure sensor and transmitted to a controller for the driver, wherein the displacement drive in step b) is terminated by the controller, if the standstill exceeds a predetermined maximum time or the value of the measured force exceeds a predetermined force threshold. The respective driving position is detected and stored by the control device. A standstill can be determined on the basis of a constancy of the position signal or the absence of step signal signals or an overrun of a servo output measured value.

Advantageously, in step e), the driver is brought into engagement with a driver engagement of the knife and the driver is moved position-controlled by the controller along the shaft, whereby the knives are positioned.

In a first variant, the knives are successively pushed out of the storage area and positioned by the driver in step e).

In a second variant, in step e), the driver is engaged with a driving engagement of a suitable knife to then eject a required number of knives from the storage area, said knife being displaced along the shaft until it is located at a desired location and subsequently, the follower is released and engaged with a knife adjacent in the direction of displacement, which in turn is then positioned as desired, and these steps are repeated until the required number of knives are positioned as desired.

Preferably, the driver engages in step b) on a front side in the direction of displacement side of the last deferred knife to move the knife.

The upper knife and the lower knife can be moved by the same driver or in each case by its own associated driver.

Preferably, before the step a), the shafts are initially offset axially relative to one another (axial offset) and subsequently perpendicular thereto (radial offset) to disengage the blades from their cutting engagement, and after step e) the radial offset and following are first the axial offset compensated by correspondingly opposite motion controls to position the blades in the cutting engagement.

The object is achieved on the device side in a generic cutting device in that the at least one upper and lower blade each have a circumferential groove, and that the or the two drivers each have a mating engagement lip for coupling with the at least one upper or a lower blade exhibit.

Preferably, the engagement lip is a peripheral portion of a substantially rectangular cam plate.

Advantageously, the driver or carriers are respectively arranged on a linear stage which runs parallel to the harmonic and the lower shaft.

Advantageously, the engagement lip is substantially semicircular.

Preferably, each linear stage is associated with at least one linear lift cylinder for raising and lowering the engagement lip relative to the linear stage to engage the engagement lip of the follower with a groove of a knife.

Preferably, a radial stroke cylinder is arranged at opposite ends of the upper shaft and / or the lower shaft, which generates the radial offset.

Preferably, in each case an axial stroke cylinder is arranged at the opposite ends of the upper shaft and / or the lower shaft, which generates the axial displacement.

Advantageously, the at least one upper blade and / or the at least one lower blade each have a spacer in order to set a suitable mutual axial distance of the blades.

Preferably, the spacer is a circumferential spacer ring.

The cutting device advantageously has 10, 15, 20, 25 or 30 disc knife pairs.

The web material is advantageously a paper web or a film web, for example made of PVC, PP, PE or PU, a sandwich film web, a laminate web, a textile web, a metal sheet web or an edge material web, for example of veneer, ABS or melamine resin.

• Fig. 1a, b, c und d eine Seiten-, Front-, Querschnitts- und perspektivische Ansicht eines erfindungsgemäßen Obermessers einer Schneidvorrichtung;
• Fig. 2a, b, c und d eine Seiten, Front-, Querschnitts- und perspektivische Ansicht eines erfindungsgemäßen Untermessers einer Schneidvorrichtung;
• Fig. 3a, b und c eine Front-, Querschnitts- und perspektivische Ansicht des Obermessers der Fig. 1, das im schneidenden Eingriff mit dem Untermesser der Fig. 2 steht;
• Fig. 4 eine schematische Darstellung eines Ausschnitts einer erfindungsgemäßen Schneidvorrichtung, die auf einer Oberwelle das erfindungsgemäße Obermesser der Fig. 1 und auf einer Unterwelle das erfindungsgemäße Untermesser der Fig. 2 trägt, wobei den Messern jeweils ein Mitnehmer auf einem Lineartisch zugeordnet ist, womit die Messer zu verschieben sind;
• Fig. 5 eine perspektivische Ansicht eines Mitnehmers der Fig.4;
• Fig. 6 eine schematische Darstellung vom mehreren erfindungsgemäßen Untermessern auf einer Unterwelle, wobei eine Teil der Untermesser durch die Verschiebeeinrichtung auf der Unterwelle positioniert wird;
• Fig. 7a, b, c und d eine Seiten-, Front-, Querschnitts- und perspektivische Ansicht einer ersten Variante des erfindungsgemäßen Obermessers;
• Fig. 8a, b, c und d eine Seiten-, Front-, Querschnitts- und perspektivische Ansicht einer zweiten Variante des erfindungsgemäßen Obermessers; und
• Fig. 9a, b, c und d eine Seiten-, Front-, Querschnitts- und perspektivische Ansicht einer Variante des erfindungsgemäßen Untermessers.

The invention will be explained below with reference to an embodiment with reference to a drawing. Show it:

• Fig. 1a, b, c and d a side, front, cross-sectional and perspective view of a top blade according to the invention a cutting device;
• Fig. 2a, b, c and d a side, front, cross-sectional and perspective view of a lower blade according to the invention a cutting device;
• Fig. 3a, b and c a front, cross-sectional and perspective view of the upper blade of Fig. 1 , which in cutting engagement with the lower blade of the Fig. 2 stands;
• Fig. 4 a schematic representation of a section of a cutting device according to the invention, the inventive upper blade on a harmonic Fig. 1 and on a lower shaft, the lower blade of the invention Fig. 2 carries, wherein the knives each a driver is assigned to a linear table, which are the blades to move;
• Fig. 5 a perspective view of a driver of Figure 4 ;
• Fig. 6 a schematic representation of several lower blades according to the invention on a lower shaft, wherein a part of the lower blade is positioned by the displacement device on the lower shaft;
• Fig. 7a, b, c and d a side, front, cross-sectional and perspective view of a first variant of the upper blade according to the invention;
• Fig. 8a, b, c and d a side, front, cross-sectional and perspective view of a second variant of the upper blade according to the invention; and
• Fig. 9a, b, c and d a side, front, cross-sectional and perspective view of a variant of the lower blade according to the invention.

Fig. 1 shows an inventive upper blade 7 in different views, which is designed to be placed on a harmonic 5 a cutting device 1 (see Fig. 4 ).

The upper blade 7 differs from the known in the prior art upper blades by a circumferential groove 7 N, which serves as a driving engagement for a driver 130 (see Fig. 4 ) as described below.

Fig. 2 shows various views of a lower blade 11 according to the invention, which is designed to be arranged on a lower shaft 9 of the cutting device 1 (see Fig. 4 ).

The lower blade 11 differs from the known in the art lower blades by a circumferential groove 11 N, which serves as a driving engagement for a driver 13U (see Fig. 4 ) as described below.

Fig. 3 shows a disc knife pair 3, consisting of an upper blade 7 and a lower blade 11, in different views, the upper blade 7 and the lower blade 11 are in a cutting engagement, as it is made for example in the cutting device 1, when the outer blade 7 on the upper shaft 5 and the lower blade 11 is located on the lower shaft 9 in order to cut a passing through the cutting device 1 web material in strips.

Fig. 4 shows the arranged on the upper shaft 5 upper blade 7 in cutting engagement with the arranged on the lower shaft 9 lower blade 11. The shafts 5, 9 is associated with a respective linear stage 250, 25U, which runs parallel to the associated shaft 5, 9.

On each linear stage 250, 25U, a driver 130, 13U is arranged so as to be longitudinally displaceable, wherein the positioning of the drivers 130, 13U takes place along the respective linear stage 250, 25U by means of a control (not shown).

Fig. 5 shows the linear stage 25U with the driver 13U arranged thereon in a perspective view, but the linear table 250 and the driver 130 are each identical in construction.

The cam 13U has a cam plate 13M which forms, along a peripheral portion, an engaging lip 13E which is substantially semicircular.

The driver plate 13 M is by means of two Linerhubzylinder 27 in the vertical direction (in Fig. 5 from top to bottom) to raise and lower the engagement lip 13E relative to the stage 25U.

The Linearhubzylinder 27 of the driver 13U are preferably each a pneumatic cylinder, and the activation of the Linearhubzylinder 27 is set by the controller, not shown.

As described below, the lower blade 11 can be appropriately positioned along the lower shaft 9 by engaging the engaging lip 13E of the driver 13U with the groove 11N in the lower blade 11 by appropriately sliding the driver 13U along the linear table 25U and lifting it and lowering the engaging lip 13E by means of the Linearhubzylinder 27th

Fig. 4 shows a storage area 17 of the cutting device 1, in which on the shafts 5, 9 arranged and not required for a current cutting operation knives 7, 11 may be arranged. The knives 7, 11 are arranged side by side in the storage area 17 so that they rest against each other and a knife pushed first into the storage area 17 bears against a stop 15 of the shafts 5, 9.

With reference to Fig. 6 the method according to the invention for positioning the knives 7, 11 on the shafts 5, 9 will now be described.

First, a predetermined number of knives 7, 11 arranged by hand arbitrarily on the associated shaft 5, 9, preferably only a short distance on the shafts 5, 9 pushed.

Subsequently, the controller moves the dogs 130, 13U to an end of the shafts 5, 9 opposite the storage area 17 and activates the linear lifting cylinders 27 so that the engaging lip 13E is moved closer to the associated shaft 5, 9 than for engagement with a groove 7N, 11N is necessary.

The control activates the linear stages 250, 25U in such a way that the drivers 130, 13U are displaced in the direction of the storage area 17.

During this shifting operation, each driver plate 13M eventually strikes a side surface 7S of the upper blade 7 or a side surface 11S of the lower blade 11, and with a further displacement of the drivers 130, 13U in the direction of the storage region 17, all the knives 7, 11 become in the storage area 17 postponed.

In an alternative embodiment, the last pushed onto the shaft 5, 9 knives 7, 11 aligned at a mark 19, so that the control of the position of the groove 7N and 11N is known, whereby the engaging lip 13E of each driver 130, 13U through the controller can be moved such that it engages with the respective groove 7N, 11N, in order to move the last pushed knife 7, 11 in the direction of the storage area 17 by the then formed mold flow. The marker 19 may be a bar mark on the shaft 5, 9 (perpendicular to the longitudinal axis) or may be formed by a laser pointer directed to the center of the shaft 5, 9 to align the groove 7N, 11N at a laser spot.

During the displacement of the knives 7, 11 in the direction of the Vorratsbereicht 17 a shifting force increases, which must apply the linear stage 250, 25U to move the knives 7, 11 in the storage area 17, as more and more knives 7, 11 through the Driver 130, 13U are moved while they move in the direction of the storage area 17. To the driver 130, 13U, for example, a pressure sensor 21 is arranged, which is in connection with the displacement control to determine the displacement force of the driver 130, 13U, while the drivers 130, 13U are moved in the direction of the storage area 17. Preferably, a servo drive is used, which is to operate switchable between a speed control and a torque control.

If the drivers 130, 13U are further displaced in the direction of the storage area 17, then finally all the knives 7, 11 adjoin one another, with the last deferred knife resting against the driver 130, 13U.

In a further displacement finally proposes a rear side in the direction of displacement 7S, 11S of the first deferred knife 7, 11 to the stop 15 of the respective shaft 5, 9, whereby the measured by the pressure sensor 21 displacement force steadily increases, although the drivers 130, 13U do not move further in the direction of the storage area 17. The controller detects this situation (or exceeding a predetermined pressure force threshold) and stops moving the drivers 130, 13U. Alternatively, in a speed-controlled servo drive, the drive current is monitored for the exceeding of a maximum value or determined at a torque control of the standstill by monitoring the position reporting signals.

The knives 7, 11 are now arranged next to each other and abut each other, wherein a side surface of a first pushed on the shafts 5, 9 knife rests against the respective stop 15 of the shafts 5, 9. This standstill position is detected and stored by the control device.

Based on the position of the drivers 130, 13U now reached, the controller calculates a total knife width MGL of the knives 7, 11 lined up, that is, the controller determines a distance between the drivers 130, 13U to the respective stop 15 of the associated shaft, 5, 9.

Since the controller knows the width of the knives 7, 11, the controller can calculate the number of knives 7, 11 on the associated shaft 5, 9 based on the total width of the knife MGL.

With the aid of the total knife width MGL and the number of knives, the controller can also calculate the position of the grooves 7N, 11N of the knives 7, 11 on the shaft 5, 9.

In order now to arrange a number of knives 7, 11 required for a cutting operation on the associated shaft 5, 9, for example six lower knives 11, the engaging lip 13E of the driver 13U is moved into the storage area 17 in such a way that it engages with the groove 11N of the sixth lower blade 11 engages.

The controller then reverses the direction of displacement of the driver 13U, and six lower blades 11 are ejected from the storage area 17.

The lower blade 11 engaged with the engaging lip 13E of the driver 13U is displaced along the lower shaft 9 until it has reached the desired position on the lower shaft 9.

Then, the engagement lip 13E is released from the sixth lower blade 11, moved in the direction of displacement and engaged with the fifth lower blade eleventh

Now, five lower blades are further shifted by the linear stage 25U until the fifth lower blade 11 is located at the desired position.

Again, the engagement between the engagement lip 13E and the groove 11N of the fifth lower blade 11 is released when the fifth lower blade 11 is properly positioned, and the engagement lip 13E is engaged with the groove 11N of the fourth lower blade 11 as in FIG Fig. 6 shown.

This process is repeated until all lower blades 11 are positioned. The upper blades 7 are positioned in the same way.

Alternatively, the knives 7, 11 are pushed individually out of the storage area 17 and suitably positioned.

In the present embodiment, each shaft 5, 9, a linear stage 250, 25U associated with a driver 130, 13U. Alternatively, the cutting device 1 has only one linear stage with a driver which is movable between the upper shaft 5 and the lower shaft 9 in order to position the knives 7, 11. Such a linear table can, for example, be movable along a U-shaped path, wherein a shaft 5, 9 is arranged on each of the free legs of the U-shape.

At least one radial lifting cylinder is advantageously arranged at the ends of at least one shaft 5, 9 in order to increase a mutual spacing of the shafts 5, 9, whereby the shafts 5, 9 are arranged relative to one another in a cutting position in which the upper knives 7 are in cutting engagement with the lower knives 11, and the shafts 5, 9 can be arranged on the other hand in a displacement position in which the upper knives 7 are not in cutting engagement with the lower knives 11 and independently along the respective shaft 5, 9 can be moved by the driver 130, 13U. The Radialhubzylinder the at least one shaft 5, 9 solve the knives 7, 11 thus before positioning them from their cutting engagement by moving the shafts 5, 9 in the traversing position for positioning the knives. After the positioning of the knives, the radial lifting cylinders move the shafts 5, 9 back into the cutting position, so that the upper knives 7 are in cutting engagement with the lower knife 11 in order to cut web material into strips.

The Radialhubzylindern is preferably assigned in each case a Axialhubzylinder to adjust before performing the radial offset an axial displacement of the shafts 5, 9 in the longitudinal direction of the shafts 5, 9. In this case, an axial offset and following with the aid of radial stroke cylinder, a radial offset of the shafts is first set by means of Axialhubzylinder to move the shafts 5, 9 from the cutting position to the displacement position.

In order to completely exchange the knives 7, 11 arranged on the shafts 5, 9, the control moves the drivers 130, 13U against the respective stop 15 and reverses the direction of displacement of the respective driver 130, 13U, so that all the knives 7, 11 contact the End of the shaft 5, 9 are pushed, which is opposite to the storage area 17. Since the control of the number of knives 7, 11 on the respective shaft 5, 9 known, the displacement of the driver 130, 13U is stopped in time, so that the last deferred knife 7, 11 in a defined small distance from the free end the respective shaft 5, 9, which is opposite to the storage area 17.

If the knives 7, 11 are to be arranged differently at the end of a cutting process for a subsequent cutting operation, that is to say the number and / or the position of the knives 7, 11 are changed, the above-described steps for positioning the knives 7, 11 are repeated, that is, the sliding of all knives 7, 11 in the storage area 17 and the subsequent repositioning of the required knives 7, 11.

The knives 7, 11 are fixed in a known manner on the respective shaft 5, 9, for example by a positive connection or a frictional connection. A positive connection can be achieved, for example, in that a wedge running along the longitudinal axis of the shaft 5, 9 in a groove is pressed by means of compressed air into a notch formed in the knives 7, 11. If no corresponding indentation is formed in the knives 7, 11, then there is a frictional connection between the wedge and the knives 7, 11. In particular, in the latter variant, a plurality of longitudinally extending wedges may be provided, which preferably have a uniform angular offset with each other, in order to achieve the best possible adhesion between the shafts 5, 9 and the knives 7, 11.

In order to simplify the displacement of the knives 7, 11 on the shafts 5, 9, the shafts 5, 9 can rotate during the positioning of the knives 7, 11.

In this type of positioning of the knives 7, 11 is crucial that they rest in the storage area 17 directly to each other and are not separated from each other, for example, house dust or cutting dust, otherwise the determination of the total knife width MGL would be subject to an error and the calculation of the number the knives 7, 11 and in particular the calculation of the position of the grooves 7N, 11N could not be performed with the required accuracy. The shafts 5, 9 are therefore advantageously associated with a cleaning device for the knives 7, 11 in order to free the side surfaces 7S, 11S from dust and the like. The cleaning means may be constituted, for example, by compressed air nozzles arranged at regular intervals along the longitudinal direction of the shafts 5, 9 to blow dust and the like from the side surfaces 7S, 11S of the knives 7, 11, preferably before performing the radial displacement of the shafts 5, 9. The cleaning device may alternatively or additionally be associated with the drivers 130 and 13U, which have, for example, compressed-air nozzles for cleaning the blades 7, 11 along the engagement lip 13E. In this case, the knives 7, 11 can be cleaned by moving the dogs 130, 13U along the entire length of the shafts 5, 9 to clean the knives 7, 11. The cleaning device can also be formed in the form of brushes or a rubber lip on the drivers 130, 13U, which mechanically clean the side surfaces 7S, 11S of the knives 7, 11 when the drivers 130, 13U come into engagement with the respective knives 7, 11 ,

As an alternative or in addition to a cleaning device, the knives 7, 11 may each have a spacer 7A, 11A in order to set a mutual distance between the knives 7, 11.

Fig. 7 shows in different views an upper blade 7, the upper blade of the Fig. 1 to the fact that this additionally has a spacer 7A in the form of a circumferential spacer ring. Cutting dust accumulating during cutting of the continuous web material is deposited on the spacer 7A and can not protrude axially beyond the spacer 7A since otherwise it would fall off the upper blade 7. In this way it is ensured that the mutual distance between upper blades 7 is predetermined solely by the spacer 7A.

Fig. 8 shows a variant of the upper blade 7 of Fig. 7 in which the spacer 7A is disposed on an opposite side surface 7S. The spacer 7A and a cutting blade 7K of the upper blade 7 are thus arranged on opposite side surfaces 7S of the upper blade 7.

Fig. 9 shows various views of a lower blade 11, the lower blade of the Fig. 2 to the extent that it has a spacer 11A. The spacer 11A is in turn formed as a circumferential spacer ring.

The spacers 7 A, 11 A of Fig. 7 to 9 are each shown as a circumferential spacer ring. Alternatively, the spacers 7A, 11A may each be formed by offset-spaced spacers, for example by four spacer tabs, which are arranged at an angular offset of 90 ° to each other on a side surface 7S, 11S.

For example, if spacers 7A are used in the upper knives, spacers 11A need not necessarily be used on the lower knives, and vice versa.

The described knives 7, 11 can first be pushed onto a shaft 5, 9 both with the one side surface 7S, 11S and also with the opposite side surface 7S, 11S, that is to say they can be used on both sides. However, since the grooves 7N, 11N of the knives 7, 11 are arranged asymmetrically, the control must be entered before positioning the knives 7, 11 of the control device in which orientation they have been slid to match the position of the grooves 7N, 11N calculated.

LIST OF REFERENCE NUMBERS

1

cutter

3

Messer couple

5

harmonic

7

upper blade

7A

Spacer of the upper knife (spacer ring)

7K

Blade of the upper knife

7N

Groove in the upper knife

7S

Side surface of the upper knife

9

lower shaft

11

lower blade

11A

Spacer of the lower blade (spacer ring)

11N

Groove in the lower blade

11 p

Side surface of the lower blade

130

Driver for upper knife

13U

Driver for lower knife

13E

Engaging lip of the driver 130, 13U

13M

Carrier plate of the driver 130, 13U

15

attack

17

storage area

19

mark

21

pressure sensor

250

Linear table for harmonic

25U

Linear table for lower shaft

27

Linearhubzylinder

MGL

Knife Overall Width

Claims (21)

Method for positioning knives (7, 11) of a cutting device (1), which cuts horizontally oriented web material into strips by means of at least one pair of divider knives (3), comprising a plate-shaped upper knife (7) and a lower shaft (5) on a harmonic shaft (5) 9) has an associated lower blade (11) contacting the upper blade (7) and intersecting it with: a. Arranging a number of knives (7, 11) on a shaft (5, 9), b. Moving all the knives (7, 11) by means of a driver (130, 13U) against a stop (15), so that they are arranged side by side in a storage area (17) of the shaft (5, 9) and abut each other, c. Determining a length (MGL) of the adjoining blades (7, 11) in the storage area (17) along the shaft (5, 9) (total width of the knife), d. Calculating the number of knives (7, 11) in the storage area (17) by means of the total width of the knife (MGL) and calculating the position of catch engagements (7N, 11N) of each knife (7, 11) which cooperate with the carrier (130, 13U) are designed to be able to position them appropriately along the shaft (5, 9), and e. Positioning the knives (7, 11) on the shaft (5, 9) by displacing them from the storage area (17) along the shaft (5, 9) to a desired position by means of the follower (130, 13U). Method according to claim 1, characterized in that the knives (7, 11) are pushed by hand onto the shaft (5, 9) in step a). Method according to claim 1 or 2, characterized in that a knife (7, 11) pushed last on the shaft (5, 9) is aligned with a marking (19), thus in that the driver engagement (130, 13U) of this blade (7, 11) is located at a defined position on the shaft (5, 9) for engagement with the driver (130, 13U). Method according to one of the preceding claims, characterized in that, in step, a drive standstill is measured by monitoring position-detection signals of a positioning drive or b) a displacement force from a pressure force sensor (21) and / or a servo-current sensor of a servo-positioning drive is sent to a controller for the driver (130 , 13U), wherein the shift in step b) is terminated by the controller when the value of the measured pressing force or a servo current exceeds a predetermined force threshold. Method according to one of the preceding claims, characterized in that in step e) the driver (130, 13U) is brought into engagement with a driver engagement (7N, 11N) of the blade (7, 11) and the driver (130, 13U) is engaged the controller is moved position-controlled along the shaft (5, 9), whereby the knives (7, 11) are positioned. Method according to one of the preceding claims, characterized in that the knives (7, 11) in step e) are pushed and positioned successively out of the storage area (17) by the driver (130, 13U). Method according to one of claims 1 to 5, characterized in that in step e) the driver (130, 13U) is brought into engagement with a driver engagement (7N, 11N) of a suitable blade (7, 11), then a required number of knives (7, 11) from the storage area (17), said knife (7, 11) being displaced along the shaft (5, 9) until it is located at a desired location, and following the dogs (130 , 13U) is released and engaged with a knife (7, 11) adjacent in the direction of displacement, which in turn is positioned as desired, and these steps are repeated until the required number of knives (7, 11) are positioned as desired , Method according to one of the preceding claims, characterized in that the driver (130, 13U) in step b) on a front side surface in the direction of displacement (7S, 11S) of the last pushed knife (7, 11) engages, whereby the knives (7, 11) are to be moved. Method according to one of the preceding claims, characterized in that the upper blades (7) and the lower blades (11) are displaced by the same driver or each by a separate driver (130, 13U). Method according to one of the preceding claims, characterized in that before the step a) the shafts (5, 9) are initially displaced axially relative to each other (axial offset) and are displaced perpendicularly relative thereto (radial offset) in order to move the knives (7, 11) from their cutting engagement, and that after step e) first the radial offset and following the axial offset is compensated to position the blades (7, 11) in the cutting engagement. Cutting device for carrying out the method according to one of the preceding claims and for cutting horizontally directed passing web material in strips by means of at least one pair of divider blades (3) on a harmonic (5) a plate-shaped upper blade (7) and on a lower shaft (9) an associated comprising upper blade (7) intersecting lower blade (11),
characterized in that
each of at least one of the associated upper and lower blades (7, 11) each have a circumferential groove (7N, 11N) / s, and that the or the two drivers (130, 13U) each have a mating engagement lip (13E) for Coupling with the at least one upper or lower blade (7, 11). Cutting device according to claim 11, characterized in that the engagement lip (13E) is a peripheral portion of a substantially rectangular cam plate (13M). Cutting device according to claim 12, characterized in that the driver (s) (130, 13U) are respectively arranged on a linear stage (250, 25U) which is parallel to the upper shaft (5) and the lower shaft (9). Cutting device according to claim 11, 12 or 13, characterized in that the engagement lip (13E) is substantially semicircular. Cutting device according to claim 13 or 14, characterized in that each linear table (250, 25U) is associated with at least one linear lifting cylinder (27) for raising and lowering the engaging lip (13E) relative to the linear table (250, 25U), whereby the engaging lip (13E ) of the driver (130, 13U) is to be brought into engagement with a groove (7N, 11N) of a blade (7, 11). Cutting device according to one of the preceding claims, characterized in that in each case a Radialhubzylinder is arranged at opposite ends of the upper shaft (5) and / or the lower shaft (9) in order to be able to produce the radial displacement. Cutting device according to claim 16, characterized in that at the opposite ends of the upper shaft (5) and / or the lower shaft (9) in each case a Axialhubzylinder is arranged in order to produce the axial displacement can. Cutting device according to one of the preceding claims, characterized in that in each case at least one of the upper blades (7) and / or the at least one of the lower blades (11) in each case has a spacer (7A, 11A), in order to ensure a mutual axial spacing of the blades (7 , 11) to be able to adjust. Cutting device according to claim 18, characterized in that the spacer (11A) is a circumferential spacer ring. Cutting device according to one of the preceding claims, characterized by 10, 15, 20, 25 or 30 disc knife pairs (3). Cutting device according to one of the preceding claims, characterized in that the web material comprises a paper web or a film web, for example of PVC, PP, PE or PU, a sandwich film web, a laminate web, a textile web, a metal sheet web or an edge material web, for example of veneer, ABS or melamine resin, is.

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