EP2241441A1 - Device for processing a web of material between two rollers which operate in opposite directions - Google Patents

Abstract

The device has a machine frame, and working rollers (2, 3) positioned in an inner side of the machine frame, where an axial gap is formed between the rollers. Each roller has bearing sections (9, 9a) positioned in the inner side of the machine frame. Four bearer rings (4, 4a, 5, 5a) are arranged on the bearing sections, and comprise conical running surfaces (L) that roll-off against each other in pairs. One of the bearer rings is displaceable in the axial direction along one of the bearing sections by an adjusting device (1a), which comprises an actuator fixed at the bearer rings.

Description

Device for processing a material web between two counter-drivable work rolls

The present invention relates to a device for processing a material web between two counter-drivable work rolls according to the preamble of claim 1.

When working, especially when printing or rotary punching, of webs of material, the distance between work rolls, so-called anvil, plate or magnetic cylinders must be kept very accurately. In addition, the distance must not change under load. In addition, the cylinders must be able to be turned on or off in a simple manner reproducible when webbing.

These claims are made by known devices with arranged on the work rolls Schmitzringen according to EP 0 295 449 A2 or EP 0 899 068 A2 Fulfills. Such devices already have the advantage that the center distance between the work rolls can be varied to compensate, for example, for changes due to heating, wear or variations in paper thickness. An adjustment of the angle between the axes of the work rolls has been solved only very complex by eccentric mounting of the bearer rings on a work roll.

The present invention has the object to improve a device of the type mentioned in such a way that the angle between the axes of the work rolls is as simple as possible variable. Basically, an adjustment of the Winkels during standstill of the device to enable. Furthermore, a further object is to allow a one-sided adjustment of the angle during operation of the device.

According to the invention this object is achieved by a device having the characterizing features of claim 1.

Advantageous embodiments of the invention are specified in the subclaims.

The device according to the invention comprises, in a manner known per se, a machine frame, two work rolls and four bearer rings. The work rolls are stored in the machine frame. Between the axes of the work rolls there is an axial distance and consequently a distance between the work surfaces which are cylindrical on the work rolls, so that the material web can be processed between the work surfaces. The work rolls have bearing portions within the machine frame adjacent the work surfaces at both ends of the work rolls. Thus, four bearing sections are formed, on each of which a bearer ring is arranged. The bearer rings roll with conical running surfaces in pairs from each other.

According to the invention, at least one of the bearer rings is mounted so as to be axially displaceable on at least one of the bearing sections.

This allows in a particularly simple manner a one-sided change in the axial distance of the work rolls to each other and thus an adjustment of the angle of the axes of the work rolls to each other. For this purpose, the axially displaceable receptacle extends only one of the bearer rings.

The unilateral adjustment of the axial distance of the work rolls allows a more flexible operation compared to a forced two-sided change in the axial distance by lateral displacement of a work roll in the axial direction while the other work roll remains axially fixed.

It may therefore also make sense to provide axially displaceable bearer rings on both sides, so that the work rolls no longer have to be displaced axially relative to one another in order to bring about a parallel change in the axial spacing.

It is also advantageous that the one-sided axially adjustable bearer ring remains coaxial with the work roll and not, as realized in known devices, is eccentric to store on the work roll. The bearer rings rotate according to the invention together with the working cylinder. Thus, expensive storage is avoided.

In an advantageous embodiment, the device has an adjusting device for displacing the bearer ring, by means of which the bearer ring can be displaced in the axial direction in an axial position with respect to the work roll and fixed in the axial position.

Such a control device allows a reproducible adjustment of the axial position of the bearer ring, without the bearer ring must be solved in a separate, complex process step and newly attached to the work roll.

An advantageous embodiment provides that the actuating device has an actuator which is fixed at least indirectly to the bearer ring in the axial direction.

Particularly advantageously, the adjusting device has a centrally arranged in the work roll, axially displaceable in the work roll bolt and a connecting element between the bolt and the bearer ring. The connecting element fixes the bearer ring axially relative to the bolt, in particular the connecting element penetrates the bolt radially and projects into the bearer ring. The connecting element rotatably connects the bolt and the bearer ring with the work roll. The actuator is fixed by means of the bolt and the connecting element in the axial direction of the bearer ring.

The adjustment of the axial position of the bearer ring thus takes place inexpensively and simply by any actuator which acts on the easy-to-manufacture bolt and the very simple in this connection member to be arranged on the bearer ring.

The aforementioned embodiments are relevant for any operating states of the device. Both an adjustment at standstill and an adjustment during the operation of the device, ie during rotation of the work rolls, are taken into account.

An advantageous embodiment of the adjusting device for adjusting the axial position of the bearer ring at a standstill of the device has an actuator designed as a screw. The set screw is mounted axially in the work roll. Axially inside the set screw is designed with an external thread, which engages in a corresponding internal thread of the bolt. The set screw can be actuated, for example, with a tool.

The actuator, which is particularly simple in the form of the adjusting screw, causes an axial displacement of the bearer ring by the secure transmission of a rotational movement of the adjusting screw into a translational movement of the bolt via the thread engagement described, the displacement being controllable from the outside. The bearer ring can remain rotatably mounted directly on the work roll, so that only a displacement in the axial direction must be ensured. Such bearings for bearer rings are particularly inexpensive to manufacture.

In an advantageous embodiment of the adjusting device for adjusting the bearer ring when the processing machine is at a standstill, a hexagon socket is formed in the set screw at an axially outer end. The edges of the hexagon socket run in the axial direction. The set screw is thus to be operated, for example, with a tool having an external hexagon.

Such an embodiment of the screw allows a low-wear operation by means of a simple tool.

In an advantageous embodiment, the adjusting device is designed for adjustment at a standstill of the device with a screw, which has a circumferential collar. The collar is axially mounted in the work roll by means of at least one annular element, in particular by means of two retaining rings adjacent to the collar on both sides.

A storage of the screw in the work roll by receiving the collar between axial supports is structurally particularly simple.

The axial position of the screw is thus fixed in a simple manner in the work roll, while moving axially on the outside of the screw in the work roll guided bolt axially outwardly or inwardly upon rotation of the screw. In general, such a screw rotates during operation of the device with the work roll, so that the storage is not claimed here.

The storage by means of annular elements, in particular circlips, is easy to solve when the screw has to be removed for maintenance purposes, for example.

An advantageous embodiment of the device for adjusting the axial position of the bearer ring during operation of the device comprises a flange and an adjusting spindle guided therein as an actuator.

The flange is arranged coaxially to the work roll axially outside the machine frame, in particular screwed and centrally penetrated by an internal thread. The adjusting spindle is fixed axially inward in the axial direction in the bolt. In an axially central portion of the adjusting spindle is designed with an external thread, which corresponds to the internal thread of the flange. At an axially outer end of the adjusting spindle, an adjusting element is arranged, by means of which the adjusting spindle is rotated can be. The actuating element is preferably designed as a handwheel. The handwheel is only an example of equivalent control elements that allow manual adjustment. Of course, hydraulic, electrical or pneumatic embodiments can also be used as an actuating element. Such alternative control elements allow remote adjustment.

This simply designed actuator also acts on the bearer ring via the simple design with bolt and connecting element. The proposed flange is readily attached to the existing machine frame, so that the construction of the machine frame does not need to be changed.

An advantageous embodiment of the device provides that the adjusting spindle is axially surrounded outside of the flange by a lock nut. The locking nut has in the radial direction at least one bore into which a clamping element is inserted. The clamping element acts on the adjusting spindle.

Thus, the axial position of the lock nut is fixed on the adjusting spindle. The adjusting spindle can not be axially rotated into the device against the resistance of the locking nut when the locking nut bears against the machine frame. Such locks by means of lock nut readily allow a backup of the axial position of the bolt in the work roll, which prevents it comes to an accidental adjustment by an unintentional rotation of the actuator.

In an advantageous embodiment of the device, the adjusting spindle has an encircling collar at an axially inner end. The collar is axially mounted in the bolt by means of at least one annular element, in particular by means of a securing ring.

Since the bolt rotates together with the work roll during operation and there is a connection between the bolt and the coaxially arranged stationary adjusting spindle, a corresponding bearing of the adjusting spindle in the bolt be provided, which allows an axial recording of the adjusting spindle. For such a storage, usual rolling bearings offer, which are arranged on both sides of the particularly simple executable collar. An inner rolling bearing is thus supported in the bolt, while an outer bearing is particularly cost by an annular element, in particular a retaining ring support.

Advantageously, such devices are suitable for use in printing presses.

Figur 1a

einen Axialschnitt durch ein Ende einer Arbeitswalze mit einer Stellein- richtung zur axialen Verstellung eines Schmitzrings im Stillstand der Vorrichtung, wobei der Schmitzring in eine axial innere Position ver- schoben ist,

Figur

1 b einen Axialschnitt durch den in Figur 1 a dargestellten Ausschnitt der Vorrichtung nach Drehung um 90°,

Figur 1c

eine Draufsicht auf die Arbeitswalze gemäß den Figuren 1a und 1b,

Figur 2a

einen Axialschnitt durch den in Figur 1a dargestellten Ausschnitt der Vorrichtung, wobei der Schmitzring in eine axial äußere Position ver- schoben ist,

Figur 2b

einen Axialschnitt durch den in Figur 2a dargestellten Ausschnitt der Vorrichtung nach Drehung um 90°,

Figur 2c

eine Draufsicht auf die Arbeitswalze gemäß den Figuren 2a und 2b,

Figur 3a

einen Axialschnitt durch einen Ausschnitt eines in einem Maschinen- gestell gelagerten Endes einer Arbeitswalze mit einer Stelleinrichtung zur axialen Verstellung des Schmitzrings während des Betriebs der

Figur 3b

Vorrichtung, wobei der Schmitzring in eine axial innere Position ver- schoben ist, einen Axialschnitt durch den in Figur 3a dargestellten Ausschnitt der Vorrichtung nach Drehung um 90°,

Figur 4a

einen Axialschnitt durch den in Figur 3a dargestellten Ausschnitt der Vorrichtung, wobei der Schmitzring in eine axial äußere Position ver- schoben ist,

Figur 4b

einen Axialschnitt durch den in Figur 4a dargestellten Ausschnitt der Vorrichtung nach Drehung um 90°, und

Figur 5

eine Frontansicht auf die Vorrichtung.

In the following the invention will be explained in more detail with reference to two embodiments, which are illustrated in drawings. Show it:

FIG. 1a

6 shows an axial section through one end of a work roll with a setting device for the axial adjustment of a bearer ring when the device is at a standstill, with the bearer ring being moved into an axially inner position;

figure

1 b is an axial section through the in FIG. 1 a shown detail of the device after rotation by 90 °,

Figure 1c

a plan view of the work roll according to the FIGS. 1a and 1b .

FIG. 2a

an axial section through the in FIG. 1a 5 shows a section of the device, wherein the bearer ring is displaced into an axially outer position,

FIG. 2b

an axial section through the in FIG. 2a shown section of the device after rotation by 90 °,

Figure 2c

a plan view of the work roll according to the FIGS. 2a and 2 B .

FIG. 3a

an axial section through a section of a mounted in a machine frame end of a work roll with an adjusting device for the axial displacement of the bearer ring during operation of

FIG. 3b

Device, wherein the bearer ring is moved to an axially inner position, an axial section through the in FIG. 3a shown section of the device after rotation by 90 °,

FIG. 4a

an axial section through the in FIG. 3a 5 shows a section of the device, wherein the bearer ring is displaced into an axially outer position,

FIG. 4b

an axial section through the in FIG. 4a shown section of the device after rotation by 90 °, and

FIG. 5

a front view of the device.

Like parts are designated by like reference numerals. For a better overview, not all reference numbers are given in all figures.

In the FIGS. 1a to 2c is a first embodiment of an adjusting device 1 according to the invention in an apparatus for processing a material web between two counter-driven work rolls 2, 3 shown. The adjusting device 1 is provided for the adjustment of the angle between the axes of the work rolls 2, 3 during the standstill of the work rolls 2, 3. In the FIGS. 1a . 1b . 2a . 2 B Here, only in part, an end of one of the work rolls 2 is shown, on which the axial position of a bearer ring 4 by means of the adjusting device 1 is adjustable. The bearer ring 4 has a conical running surface L on the radial outside. The design of the conical tread L takes into account the formation of a correspondingly arranged on the counter-rotating work roll 3 bearer ring 5. Although the device according to the first embodiment is not shown in a corresponding overview, illustrates the FIG. 5 Nevertheless, the arrangement of the bearer rings 4, 4a, 5, 5a on bearing sections 9, 9a of the work rolls 2, 3rd

The adjusting device 1 comprises a bolt 6, which is guided axially displaceably in an axial recess 7 of the work roll 2. The bolt 6 is perpendicular, consequently in the radial direction R, penetrated by a connecting element 8. The connecting element 8 also penetrates in the radial direction R a bearing portion 9 of the work roll 2, wherein a cylindrical surface of the bearing portion 9 is designed for axially displaceable receiving the bearer ring 4. For receiving the connecting element 8, a passage opening 10 is radially in the work roll 2 in an inner region of the bearing portion 9 executed. The passage opening 10 is dimensioned so that the connecting element 8, in the axial direction A in the work roll 2 is movable with play. The connecting element 8 engages with its ends in the bearer ring 4.

All components of the bolt 6 to the bearer 4 are thus rotatably received in or on the work roll 2.

The axial adjustment movement of the bolt 6 in the work roll 2 is effected by a trained as a screw actuator 11. For this purpose, the pin 6 axially outside, coaxial with the work roll 2, a blind hole 12 in which an internal thread 13 is executed. The adjusting screw is designed axially inside with a corresponding external thread 14, which corresponds to the internal thread 13 of the bolt 6.

The adjusting screw is supported on both sides axially in the work roll 2 with annular elements 15 designed as securing rings. For this purpose, the screw on a circumferential collar 16, which in turn has a designed as a plain bearing bearing 17 with the axial recess 7 of the work roll 2.

Axially outward, a hexagon socket 18 is made in the adjusting screw, so that the adjusting screw can be actuated by means of a standard tool. By appropriate rotation of the adjusting screw of the bearer 4 is moved during standstill of the device relative to the work roll 2 axially inward or outward.

In the FIGS. 1a to 1c the bearer ring 4 is shown in an axially inner position in which it is supported against the work roll 2. By a rotation of the screw of the bearer ring 4 is pulled axially outward, so that, as in the FIGS. 2a and 2b shown, radially outside between the work roll 2 and the bearer ring 4, a gap S is formed. The tread L is conical, so that the two mutually rolling work rolls 2, 3 come closer to each other on the side of the actuator 1 or remove from each other with axial displacement of the bearer ring 4, ie the center distance of the work rolls 2, 3 is accordingly during standstill of the work rolls 2, 3 unilaterally changed.

In the FIGS. 3a to 5 a second embodiment of an actuating device 1a is shown, wherein the work roll 2 is received by means of rolling bearings 19 in a machine frame 20. Analogous to the first embodiment of the adjusting device 1, the axial adjustment of the bearer ring 4 is also provided here via a pin 21, which is connected via a Verbindungsseiement 22 with the bearer ring 4 in conjunction. However, the adjusting device 1a is suitable for adjusting the angle between the axes of the work rolls 2, 3 during operation of the device.

The bolt 21 is adjusted or moved by an actuator 23 designed as an adjusting spindle in its axial position. The adjusting spindle is mounted with an inner end 24 axially in the pin 21 and executed with a collar 25 which projects radially outwardly from the axially inner end 24 of the adjusting spindle. The collar 25 is supported on both sides against roller bearings 26, 27 and spaced in the radial direction R surrounded by the pin 21. The axially inner roller bearing 26 is supported against the pin 21. The axially outer roller bearing 27 is fixed by means of an annular element 28 relative to the pin 21. Thus, the pin 21 is rotatable coaxially about the adjusting spindle, but axially fixed by the adjusting spindle.

The adjusting spindle has an external thread 29 in an axially central region and an actuating element 31 at an axially outer end 30. The actuator 31 is designed in particular as a handwheel. Likewise, embodiments of the control element are suitable 31 for the electrical, pneumatic or hydraulic adjustment of the actuator 23 by remote action.

Coaxially with the adjusting spindle, a flange 32 is arranged axially on the outside of the machine frame 20 and has a central bore 33 with an internal thread 34. The adjusting spindle corresponds with its external thread 29 with the internal thread 34 of the flange 32nd

A rotation of the adjusting spindle causes its displacement in the axial direction A. Since the pin 21 is fixed axially with respect to the adjusting spindle, a rotation of the adjusting spindle thus also causes a displacement of the bolt 21 in the axial direction A.

Axially outside the flange 32, a lock nut 35 surrounds the adjusting spindle. The lock nut 35 has obliquely radially outwardly openings 36, in which a clamping element 37 can be used. If the clamping member 37 is screwed into the locking nut 35 except for the external thread 29 of the adjusting spindle and bears against the machine frame 20, it is thus prevented that the adjusting spindle can be further rotated as desired radially inward. This could be the case in case of accidental actuation of the actuating element 31. The lock nut 35 can also be used to maintain or mark a particularly suitable position of the adjusting spindle.

In the FIGS. 3a and 3b the bearer ring 4 is shown in an axially inner position on the work roll 2 fitting. By turning the adjusting spindle, the bearer ring 4 can be moved axially outward into a position spaced from the work roll 2 by a gap S 'in accordance with FIGS FIGS. 4a and 4b be moved. This is particularly advantageous during the operation of the device, that is, during a rotation of the work roll 2, possible. Together with the work roll 2, the bearer ring 4, the connecting element 22 and the bolt 21 rotate. In contrast, uncoupled by the rolling bearings 19, 26, 27, the machine frame 20, the flange 32 and the adjusting spindle stand still.

Claims (11)

Device for processing a web of material between two counter-driven work rolls (2, 3), in particular for punching or printing, with a machine frame (20), - Two work rolls (2,3), wherein the work rolls (2, 3) are mounted in the machine frame (20), between the work rolls (2, 3) is an axial distance and the work rolls (2, 3) each axially within the machine frame ( 20) formed at both ends bearing portions (9, 9 a), and - Four bearer rings (4, 4a, 5, 5a), wherein each a Schmitzring (4, 4a, 5, 5a) on each bearing portion (9, 9a) is arranged and the bearer rings (4, 4a, 5, 5a) in pairs successively have rolling conical running surfaces (L),
characterized in that at least one of the bearer rings (4, 4a, 5, 5a) on at least one of the bearing portions (9, 9a) is axially displaceable. Device according to claim 1, characterized in that the device has a setting device (1, 1 a) for displacing the bearer ring (4, 4a, 5, 5a), comprising means of which the bearer ring (4, 4a, 5, 5a) relative to the work roll (2, 3) is displaced in an axial direction (A) in an axial position and fixed in this position. Apparatus according to claim 2, characterized in that the adjusting device (1, 1a) has an actuator (11, 23) which is at least indirectly fixed to the bearer ring (4, 4a, 5, 5a) in the axial direction (A). Apparatus according to claim 3, characterized in that the adjusting device (1, 1a) has an axially displaceable in the work roll (2, 3) bolt (6, 21) and a connecting element (8) between the bolt (6) and the bearer ring (4 ), wherein the connecting element (8) the Schmitzring (4) axially fixed with respect to the bolt (6), in particular the connecting element (8) radially penetrates the bolt (6) and projects into the bearer ring (4), and the actuator (11, 23) by means of the bolt (6, 21) and the connecting element (8) in the axial direction (A) on the bearer ring (4, 4a, 5, 5a) is fixed. Device according to one of claims 3 or 4, characterized in that the actuator (11) is designed as an adjusting screw, which is axially mounted in the work roll (2) and with an external thread (14) in a corresponding Innengwinde (13) of the Bolzens (6) engages. Apparatus according to claim 5, characterized in that in the actuator (11) at an axially outer end of a hexagon socket (18) is formed, the edges of which extend in the axial direction (A). Device according to one of claims 5 or 6, characterized in that the actuator (11) has a circumferential collar (16) by means of at least one annular element (15), in particular by means of two on both sides of the collar (16) adjacent retaining rings, axially in the work roll (2) is mounted. Device according to one of claims 3 or 4, characterized in that the adjusting device (1a) has a flange (32) which is arranged coaxially to the work roll (2) axially on the outside of the machine frame (20) and the centrally passes through an internal thread (34) and the actuator (23) is designed as an adjusting spindle, which is mounted with an inner end (24) axially in the bolt (21), which in an axially central portion with an external thread (29) in the corresponding internal thread (34). engages and at an outer end (30) has an actuating element (31). Device according to claim 8, characterized in that the actuator (23) is surrounded axially outside the flange (32) by a locking nut (35), wherein the locking nut (35) has at least one opening (36) in an approximately radial direction (R) into which a clamping element (37) is inserted, the clamping element (37) acting on the actuator (23). Device according to one of claims 8 or 9, characterized in that the actuator (23) at the axially inner end (24) has a circumferential collar (25) by means of at least one annular element (28), in particular by means of a locking ring, axially is mounted in the bolt (21). Printing machine with a device according to one of the preceding claims.

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