DE102014203087B4 - Method for driving a sheet-fed printing machine - Google Patents

Abstract

A method for driving a sheet-fed printing machine using a drive comprising a driven by a main drive (HA) Antriebsräderzug for driving sheet-guiding cylinders and / or drums and for driving at least one plate cylinder drive shaft (15) having a plate cylinder (7), wherein the plate cylinder drive shaft (15) as a part of the drive wheel train ausgestaltetes plate cylinder drive wheel (16) is freely rotatably mounted, the plate cylinder drive shaft (15) is associated with the control of the printing machine position-controllable single drive, the control of the printing press retrievable job-related data contains and the storage of the plate cylinder drive wheel (16) on the plate cylinder drive shaft (15) is associated with a frictional clutch (K2), such that in the printing operation in an operating mode with an open frictional clutch (K2) the plate cylinder Antrie bsrad (16) of the drive wheel train is movable and the plate cylinder (7) by the single drive synchronously to the main drive (HA) is trackable and in another mode in the printing operation with a closed non-positive clutch (K2) the plate cylinder drive wheel (16) on the plate cylinder Drive shaft (15) by the non-positive clutch (K2) on the plate cylinder drive wheel (16) can be fixed in a register-oriented position, whereby in a mode with open frictional clutch (K2) a print job is executed by the single drive of the plate cylinder (7 ) is synchronously tracked to the main drive (HA) of the printing press, - after completion of the print job in preparation for job change setup work to be performed, the single drive drives the plate cylinder (7) and is determined on the basis of the job-related data of the subsequent order by the machine control, whether the plate cylinder (7) for Running the follow-up order is operated in the previous mode or- for carrying out the subsequent order in a further mode of the plate cylinder (7) is integrated into the drive wheel, such that the plate cylinder (7) is rotated by the single drive in the register-correct rotational position and in This rotational angle position, the non-positive clutch (K2) is closed.

Description

The invention relates to a method for driving a sheet-processing printing machine according to the features of the first claim.

In the DE 196 23 224 C1 a drive for a sheet-fed offset printing machine is described in which the cylinders or drums are connected to each other via a continuous gear train and the supply of drive energy via at least one force acting on this gear train drive. The other not coupled with this gear train cylinder have individual controllable drives, such that these drives are individually driven relative to the sheet transfer system or the associated blanket cylinder. For this purpose, the plate cylinders of the printing press are provided.

The disadvantage here is that it comes in load operation to load fluctuations when the channels of the blanket cylinder and the pressure cylinder on and run out. These vibrations cause at different thicknesses of material strips between blanket cylinder and plate cylinder, because the motor drive of the plate cylinder can not follow the path differences. If plate cylinders and rubber cylinders are in gear connection, this problem only occurs with large thickness differences and the blanket cylinder must be adapted in diameter. Another major disadvantage arises when using a Deltafeuchtwerkes. The slowed dampening roller requires different drive torques when unwinding over the lateral surface of the plate cylinder, compared to the settlement over the channel. Even these shocks can not compensate for the direct drive of the plate cylinder and it comes to more Störstreifen.

In the in the DE 10 2005 018 677 A1 proposed drive these problems are bypassed. In this solution, the common gear train has a freely rotatable drive wheel arranged on each plate cylinder. Each drive wheel is assigned a positive clutch. When the clutch is engaged, a first input drive can be fed from the main drive to each drive wheel. When disengaged clutch is on each plate cylinder from an auxiliary drive, a second input drive fed. When changing the printing plate, the main drive with gear train is separated from the plate cylinder and then the auxiliary drive is activated. This performs the printing plate change. Subsequently, the main drive is stopped with gear train and the current actual angle of the processing machine determined. The activated auxiliary drive rotates the plate cylinder in the engagement angle corresponding to the actual position and in this coupling position of the main drive is coupled with gear train to the plate cylinder.

Disadvantage of this solution is that it must be waived some functionality of the plate cylinder. Due to the toothed coupling used, it may happen that due to the immanent backlash the register accuracy is lost. A dynamic register correction is also not possible. Furthermore, it is impossible to perform a dynamic print length correction.

From the DE 10 2004 052 079 A1 a drive is known in which instead of a clutch, a superposition gear is used. The superposition gear is designed so that the main drive with the common gear train is primarily intended for the drive of the respective plate cylinder in the respective printing unit. As a result, when stopping the printing machine, for example, in an emergency stop, simultaneously with the processing machine and the respective plate or forme cylinder shutdown and the risk of injury from running after the respective plate or forme cylinder is excluded. In printing / painting operation, the auxiliary drive must be permanently activated to drive the plate cylinder in addition to the main drive with gear train. As a result, the rotational speed of the plate cylinder can be corrected.

This solution is technically very complicated by the superposition gear used. Due to the many toothed games, no faultless pressure is possible, even when using so-called harmonic drive gears.

The DE 10 2005 036 786 B3 discloses a sheet-fed printing machine in which a Plattenzylinderantriebsrad is coupled by means of a frictional coupling. During the printing operation, the plate cylinder is driven by a single drive mechanically decoupled from the main drive.

The invention has for its object to find a method for driving a sheet-processing printing machine by which the above-mentioned disadvantages can be eliminated.

According to the invention the object is achieved by a method for driving a sheet-processing printing machine according to the features of claim 1.

• 1: Schematische Darstellung einer Bogendruckmaschine
• 2: Vereinfachtes Antriebsschema für ein Druckwerk einer Bogendruckmaschine
• 3: Weitere Ausführungsform des in 2 dargestellten Antriebs

In the following, the invention will be explained by way of example. The accompanying drawings represent:

• 1 : Schematic representation of a sheet-fed printing machine
• 2 : Simplified drive scheme for a printing unit of a sheetfed press
• 3 : Further embodiment of the in 2 shown drive

In 1 is a sheet-fed press with a sheet feeder 3 , several printing units 1 , a coating plant 2 as well as a display 4 shown. Every printing unit 1 consists of a trained as a printing cylinder sheet guiding cylinder 5 a rubber cylinder 6 and a plate cylinder 7 , The plate cylinder 7 is an inking unit 8th and if necessary in the direction of rotation of the plate cylinder 7 in front of the inking unit 8th a dampening unit 9 assigned.

The coating plant 2 consists of a metering device 10 , a paint application roller 11 and a paint form cylinder 12 ,

The sheet transport takes place through the sheet guiding cylinder 5 , The drive is via the central gear train of the main drive 13 , Likewise are rubber cylinders 6 and inking unit 8th to the central gear train of the main drive 13 coupled.

Every rubber cylinder 6 , every plate cylinder 7 and every paint form cylinder 12 can be assigned a cleaning device. Every inking unit 8th has an inking unit washing device (not shown).

Like from the 2 As can be seen, the drive torque of the main drive HA on a gear 14 transfer. This gear 14 is part of a drive wheel train, in addition to the gear 14 a plate cylinder drive wheel 16 and an inking gear 17 contains.

The plate cylinder drive wheel 16 is freely rotatable on a plate cylinder drive shaft 15 arranged. Between the plate cylinder drive wheel 16 and the plate cylinder drive shaft 15 is a non-positive clutch K2 arranged. As non-positive clutch K2 a slip-poor, exactly switching electromagnetically actuated clutch is used, wherein here preferably an electromagnetically actuated friction clutch is provided.

The frictional clutch K2 is designed so that when closed non-positive clutch K2 the plate cylinder drive wheel 16 rotationally fixed with the plate cylinder drive shaft 15 connected and dissolved in force-locking clutch K2 the plate cylinder drive wheel 16 on the plate cylinder drive shaft 15 is freely rotatable.

The plate cylinder drive shaft 15 is still a direct drive motor M1 executed position-controllable single drive assigned. Under a direct drive engine M1 becomes one with the plate cylinder drive shaft 15 understood directly and without an intermediate transmission gear connected single drive motor. In a preferred embodiment, a direct drive motor designed as a servomotor is used M1 used.

The direct drive motor M1 is connected to a machine control, not shown in the figures. Callable job-related data are stored in this machine control. It is also possible to read the job-related data into the machine control before starting the print job. The inking gear 17 is an inking drive shaft 18 assigned.

On the mode of action of in 2 illustrated drive according to the invention:

In one of the possible operating modes for the printing operation with the drive according to the invention is open with frictional clutch K2 executed a print job. This is the direct drive motor M1 of the plate cylinder 7 the main drive HA tracked synchronously to the printing press. The sheet-guiding cylinders and drums as well as the inking unit 8th and possibly the dampening unit 9 Be about the drive wheel train through the main drive HA driven.

After completing the print job, another print job should be executed. For this upcoming job change setups, such as changing the printing plates or cleaning the inking unit required. To perform this set-up drives the direct drive motor M1 the plate cylinder 7 at. The frictional clutch K2 stays open.

For the subsequent subsequent job, the machine control system determines in which operating mode this is performed. The basis for this are the data stored in the machine control, in which case the thickness of the printing material used is particularly important.

It is also possible to manually enter these data immediately before the job change or in any way retrieve from a data storage and supply the machine control.

The machine control calculates in which operating mode the follow-up job is executed. As a result, the follow-up order can be carried out in the previously used operating mode or in another operating mode.

In the previously used mode, the frictional clutch remains K2 opened and the plate cylinder is in the manner described above by the direct drive motor M1 driven.

If the machine control specifies that the next job should be performed in another mode, then the plate cylinder becomes 7 integrated into the drive wheel train. This is done so that by the direct drive motor M1 the plate cylinder 7 is turned into its register-oriented position to the drive wheel train. The frictional clutch K2 is then closed, leaving the plate cylinder 7 is fixed in the register-correct rotational position.

In this mode of operation is via the main drive HA the drive torque of the printing press in the drive wheel gear 14 / Plate cylinder drive wheel 16 / Inking gear 17 driven. This will be the plate cylinder 7 , the inking unit 8th and that in 1 not shown dampening unit 9 moved synchronously according to the rotation angle of the printing press. The direct drive motor M1 is not energized.

After the follow-up order has been processed, the machine control system sends an actuating signal to the non-positive clutch K2 transmitted. The frictional clutch K2 opens. Thus, the plate cylinder 7 via the direct drive motor M1 be moved independently of the drive wheel train and be started with the set-up work in preparation for another job.

For the subsequent subsequent order is determined in the manner described above by the machine control, in which mode this is performed.

In the 3 is another embodiment of the in the 2 shown drive shown. As can be seen from this figure, the drive torque of the main drive HA from a gear 13 on a gear 14 transfer. Both gears 13 . 14 are on an intermediate shaft 19 arranged, with the gear 13 the intermediate shaft 19 rotatably associated and the gear 14 is freely rotatably mounted on this. The gear 14 is a clutch K1 assigned. This makes it possible to interrupt the drive wheel train at this point.

The gear 14 meshes with a plate cylinder drive wheel 16 freely rotatable on a plate cylinder 7 associated plate cylinder drive shaft 15 is arranged. Between the plate cylinder drive wheel 16 and the plate cylinder drive shaft 15 is a frictional clutch already described above K2 arranged.

The plate cylinder drive shaft 15 is a direct drive motor M1 executed single drive assigned.

In the illustrated embodiment, the inking gear is 17 via a clutch K3 on the inkwell drive shaft 18 freely rotatably mounted. The inking drive shaft 18 is a single drive in the form of an inking unit drive motor M2 assigned. This is expediently also designed as a direct drive motor.

The inking drive shaft 18 is still a clutch K4 assigned.

For the operation of the drive according to the invention after in 3 illustrated drive:

As already described above, in one of the possible operating modes for the printing operation with the drive according to the invention with an open non-positive clutch K2 executed a print job. This is the direct drive motor M1 of the plate cylinder 7 the main drive HA tracked synchronously to the printing press. The sheet-guiding cylinders and drums as well as the inking unit 8th and possibly the dampening unit 9 Be about the drive wheel train through the main drive HA driven. For this purpose, the clutch is K1 closed and the torque of the main drive HA is over that now loose on the plate cylinder drive shaft 15 rotatable plate cylinder drive wheel 16 on the inking gear 17 and thus can power this.

In a further embodiment, but also the clutch K1 be opened. This is the drive train from the main drive HA interrupted. With open non-positive clutch K2 drives the direct drive motor M1 the plate cylinder 7 and the inking drive motor M2 the inking unit 8th at. The clutch must K3 to be open. The clutch K4 stays closed.

After completing the print job, another print job should be executed. For this upcoming job change setups, such as changing the printing plates or cleaning the inking unit required. To perform this set-up drives the direct drive motor M1 the plate cylinder 7 continue on. The frictional clutch K2 stays open.

But it is also possible, the clutch K1 to open. In this constellation, the relevant printing unit 1 excluded from printing, with the other printing units of the printing press continue to print.

Also with open clutch K1 is the plate cylinder 7 as described above for setup tasks available. The clutch K3 Can be opened so that the inking drive motor M2 to drive the inking unit 8th for set-up tasks, such as inking unit cleaning or paint shrinkage, is available.

In a further embodiment, the clutch for this set-up work K3 closed and the clutch K4 be opened. This can then the inking drive motor M2 the plate cylinder 7 drive. The direct drive motor M1 will not be energized then.

For the subsequent subsequent order is determined by the machine control in the manner described above, in which mode this is to be performed.

LIST OF REFERENCE NUMBERS

1

printing unit

2

coating unit

3

sheet feeder

4

display

5

Sheet guiding cylinder

6

rubber cylinder

7

plate cylinder

8th

inking

9

dampening

10

metering

11

Lacquer application roller

12

Coating form cylinder

13

gear

14

gear

15

Plate cylinder drive shaft

16

Plate cylinder drive gear

17

Inker gear

18

Inker drive shaft

19

intermediate shaft

HA

main drive

K1

clutch

K2

non-positive clutch

K3

clutch

K4

clutch

M1

Direct drive motor

M2

Inking unit drive motor

Claims (10)

A method for driving a sheet-fed printing machine using a drive comprising a driven by a main drive (HA) Antriebsräderzug for driving sheet-guiding cylinders and / or drums and for driving at least one plate cylinder drive shaft (15) having a plate cylinder (7), wherein the plate cylinder drive shaft (15) as a part of the drive wheel train ausgestaltetes plate cylinder drive wheel (16) is freely rotatably mounted, the plate cylinder drive shaft (15) is associated with the control of the printing press position-controllable single drive, the control of the printing press retrievable job-related data contains and the storage of the plate cylinder drive wheel (16) on the plate cylinder drive shaft (15) is associated with a frictional clutch (K2), such that in the printing operation in an operating mode with an open frictional clutch (K2) the plate cylinder Antrie bsrad (16) of the drive wheel train is movable and the plate cylinder (7) by the single drive synchronously to the main drive (HA) is trackable and in another mode in the printing operation with a closed non-positive clutch (K2) the plate cylinder drive wheel (16) on the plate cylinder Drive shaft (15) by the non-positive clutch (K2) on the plate cylinder drive wheel (16) can be fixed in a register-oriented position, wherein - In a mode with open non-positive clutch (K2) a print job is performed by the single drive of the plate cylinder (7) is synchronously tracked to the main drive (HA) of the printing press, - After completing the print job in preparation for the job change setup work to be performed, the single drive drives the plate cylinder (7) and - is determined by the machine control on the basis of the job-related data of the subsequent order, whether - The plate cylinder (7) is operated to execute the subsequent order in the previous mode or - To carry out the subsequent order in a further mode of operation, the plate cylinder (7) is integrated into the drive wheel train such that - The plate cylinder (7) is rotated by the single drive in the register-correct rotational position and in this rotational position, the non-positive clutch (K2) is closed. Method according to Claim 1 , characterized in that the non-positive clutch (K2) is designed as a slip-intensive, exactly switchable electromagnetically actuated friction clutch. Method according to Claim 2 , characterized in that the non-positive clutch (K2) is designed as an electromagnetically operable friction clutch. Method according to Claim 1 , characterized in that a direct drive motor (M1) is provided as a single drive. Method according to Claim 1 , characterized in that a servo motor is provided as a single drive. Method according to Claim 1 , characterized in that the single drive is formed with dissolved non-positive clutch (K2) in connection with the machine control of the printing press for controlling the circumferential register of the plate cylinder. Method according to Claim 1 , characterized in that the single drive is provided with released clutch for set-up. Method for driving to Claim 1 , characterized in that the job-related data of the subsequent order are stored in the machine control. Method for driving to Claim 1 , characterized in that the job-related data of the subsequent order are retrieved from a data store and fed to the machine control. Method for driving to Claim 1 , characterized in that the job-related data of the subsequent order are manually entered into the machine control.

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