DE102009001304A1 - Printing unit for newspaper printing machine, has auxiliary drive motor positively or negatively supporting main drive motor at torque during printing operation of web-fed rotary printing machine - Google Patents

Abstract

The unit has a transfer cylinder (GZ1) and a plate cylinder (PZ1) arranged at the transfer cylinder. An inking system applies ink on the plate cylinder, and a printing material web is guided between the transfer cylinder and an impression cylinder (SZ). A main drive motor (M) drives the transfer cylinder, plate cylinder and the impression cylinder by gear wheel connections. An auxiliary drive motor (HM) positively or negatively supports the main drive motor at a torque during printing operation of a web-fed rotary printing machine i.e. newspaper printing machine. The impression cylinder is implemented either as an additional transfer cylinder or as a satellite cylinder.

Description

The The invention relates to a printing unit of a web-fed rotary printing press with at least one transfer cylinder, on which at least one forme cylinder is arranged and at least one Inking unit applies color to the forme cylinder, with one printing material web between the transfer cylinder and a counter-pressure cylinder can be passed and at least one Main drive motor via Gear connections the transfer cylinders, the form cylinder and the impression cylinder drives.

In current web-fed rotary presses, especially newspaper presses, The printing cylinder with the help of so-called single drive technology (also called single motor drive) driven.

For example in a 9-cylinder satellite structure, in which a centrally located Satellite cylinder of four transfer cylinders is surrounded, wherein the transfer cylinder each joins at least one form cylinder, drive four engines each on one Gear connection a transfer cylinder at. The centrally located satellite cylinder is indirectly via a another gear connection by a motor of one of the four transfer cylinders with powered. For controlling the motors and detecting the Current cylinder position sits on the engines one (position) encoder.

at This drive assembly may be due to gear tolerances and Process-related by torque zero crossings or load changes of the drive motors to register errors in the printing process come.

When Register refers to the register from front to back in the printing process. This belongs to the Example, that the status of the pagina, the type area mirror or other Elements on both sides are the same.

If For example, a drive motor process by creeping through the torque zero crossing is running, then a frequent change occurs the tooth flanks, which for a wear-related Increase in gear tolerance Can and continues to control the gears. in this connection the changing tensioning moment in the drive train is crucial.

Of the The inventor has therefore made the task of a drive a Printing unit of a web-fed rotary printing press available in which the previously occurring drive side occurring register error no longer occurs.

These Task is by a printing unit of a web-fed rotary printing press according to claim 1 solved.

Of the Inventor has recognized that the previous arrangement of the (position) encoder directly on the engine has the disadvantage that the register error caused by drive train side gear tolerances is conditional, not from the (position) encoder can be detected. To avoid this register error should the (position) encoder is not coupled directly to the engine but to the load side be, for example on the transfer cylinder or at the satellite cylinder.

Farther the inventor has realized that in the current drive concept Torque change or load torque change, which also to a undesirable Cause register errors, can not be compensated. By at least one additional auxiliary drive motor arranged to the "main drive motors", which can be both positive and negative driving, can sliding Torque change or Lastmomentwechsel be prevented.

in the sliding torque transition is given by the backlash reduced control dynamics, due which, despite load-side donors, leads to a larger register error can.

Out Out of the findings, the inventor proposes a printing unit a web-fed rotary printing machine having at least one transfer cylinder, on which at least one forme cylinder is arranged and at least one Inking unit applies color to the forme cylinder, with one printing material web between the transfer cylinder and a counter-pressure cylinder can be passed and at least one Main drive motor via Gear connections the transfer cylinders, the form cylinder and the impression cylinder drives, to the effect to improve that at least one auxiliary drive motor arranged is that while the printing operation of the printing press the main drive motor torque side positively or negatively supported.

hereby can sliding torque change or load torque change, which so far an undesirable Cause register errors, be compensated. By at least one in addition to the main drive motor arranged auxiliary drive motor, a sliding torque zero crossing is avoided.

If the impression cylinder is carried out either as a further transfer cylinder or as a satellite cylinder, then both rubber-rubber printing units, as well as satellite printing units can be realized. For example, the printing unit as a 9-cylinder satellite array or with two satellite cylinders be constructed as a 10-cylinder satellite array.

It is advantageous when in the printing unit to control the motors and for recording the current cylinder positions (position) encoder are arranged, wherein the (position) donors load on the transfer cylinder and / or arranged on the forme cylinder and / or on the satellite cylinder are. With load-side arrangement of the (position) encoder, the influence of the Gear play or the gear tolerance in the control of the cylinder positions be taken into account.

Of the Auxiliary drive motor can perform in the range of about 5% to 20% of the power of the main propulsion engine, preferably 10% of its power, exhibit. The power of the auxiliary drive motor can, for example have approximately 3 to 6 KW, the auxiliary drive motor current-controlled should work and be capable of regenerative power should. The auxiliary drive motor can also be designed as a compact drive, in which the motor and controller form a unit. The (current) specification is + 100%, -100% and 0% electricity. The change the current setpoint is preferably integrating to provide a unique but gentle transition to enable.

Of the Auxiliary drive motor can over at least one gear connection to the transfer cylinder and / or drive on the form cylinder and / or on the satellite cylinder.

alternative to do so, the auxiliary drive motor can have at least one belt drive on the transfer cylinder and / or on the form cylinder and / or on the satellite cylinder collect.

Farther It is advantageous if the auxiliary drive motor directly on the axis the transfer cylinder and / or the forme cylinder and / or the satellite cylinder is.

preferred Further developments of the invention will become apparent from the following Description. An embodiment The invention will be better understood without reference to the drawings explained in more detail. there shows:

1 a 9-cylinder satellite arrangement with auxiliary drive indirectly at the satellite cylinder;

2 a 9-cylinder satellite arrangement with auxiliary drive on the transfer cylinder; and

3 a 9-cylinder satellite arrangement with auxiliary drive directly on the transfer cylinder.

Hereinafter, the present invention will be described with reference to FIGS 1 to 3 described.

The 1 shows a 9-cylinder satellite arrangement with auxiliary drive HM at the satellite cylinder SZ.

Around a centrally arranged satellite cylinder SZ are four rubber cylinders GZ1 to GZ4 arranged on which a blanket or a blanket plate or a rubber sleeve are stretched and each a printed image in one color on one between satellite cylinder SZ and the rubber cylinders Apply GZ1 to GZ4 running substrate.

The Printed image is initially on the printing plates or the plate sleeves of the plate cylinder PZ1 to PZ4, whereby inking units and dampeners the printing ink and dampening solution on the surface Apply the plate cylinder PZ1 to PZ4. The inking will be each by the four related Circles symbolizes and the dampening units are interconnected by the three Circles symbolizes.

Each a related one Plate cylinder PZ1 to PZ4 and a rubber cylinder GZ1 to GZ4 are about a Geared together drivingly connected; the gear connection is symbolized by a bold line. A main engine M thus drives a plate cylinder PZ1 to PZ4 and a rubber cylinder GZ1 to GZ4. The main drive motor M, the third plate cylinder PZ3 and the third blanket cylinder GZ3 drives, drives in addition to a Gear connection to the satellite cylinder SZ. About a clutch, the Satellite cylinder SZ be disconnected from the main drive motor M.

In addition to Main drive motor M, the third plate cylinder PZ3 and the third blanket cylinder GZ3 and the satellite cylinder SZ drives an auxiliary drive motor HM via a gear connection is connected to the satellite cylinder SZ.

at This drive assembly may be due to gear tolerances and Process-related by zero torque cycles or load changes of the main drive motors M to register errors in the printing process come.

When Register refers to the register from front to back in the printing process. This belongs to the Example, that the status of the pagina, the type area mirror or other Elements on both sides are the same.

If, for example, a main drive motor M runs creeping through the torque zero crossing due to the process, then there is a frequent occurrence ges changing the tooth flanks, which on the one hand can lead to a wear-related increase in gear tolerance and continue to control vibrations of the gears. Here, the changing tension torque in the drive train is crucial.

Around To avoid these tension moments is the auxiliary drive motor HM arranged during the the printing operation of the printing machine, the main drive motors M supported on the torque side positive or negative. Thus, torque changes or Lastmomentwechsel, the previously undesirable Register errors resulted, compensated become.

The 2 also shows a 9-cylinder satellite arrangement with auxiliary drive HM, which drives over the third blanket cylinder GZ3.

Around a centrally arranged satellite cylinder SZ are four rubber cylinders GZ1 to GZ4 arranged on which a blanket or a blanket plate or a rubber sleeve are stretched and each a printed image in one color on one between satellite cylinder SZ and the rubber cylinders Apply GZ1 to GZ4 running substrate.

The Printed image is initially on the printing plates or the plate sleeves of the plate cylinder PZ1 to PZ4, whereby inking units and dampeners the printing ink and dampening solution on the surface Apply the plate cylinder PZ1 to PZ4. The inking will be each by the four related Circles symbolizes and the dampening units are interconnected by the three Circles symbolizes.

Each a related one Plate cylinder PZ1 to PZ4 and a rubber cylinder GZ1 to GZ4 are about a Geared together drivingly connected; the gear connection is symbolized by a bold line. A main engine M thus drives a plate cylinder PZ1 to PZ4 and a rubber cylinder GZ1 to GZ4. The main drive motor M, the third plate cylinder PZ3 and the third blanket cylinder GZ3 drives, drives in addition to a Gear connection to the satellite cylinder SZ. About a clutch, the Satellite cylinder SZ be disconnected from the main drive motor M.

In addition to Main drive motor M, the third plate cylinder PZ3 and the third blanket cylinder GZ3 and the satellite cylinder SZ drives an auxiliary drive motor HM via a gear connection is connected to the third blanket cylinder GZ3.

at a drive with the auxiliary drive motor on the rubber cylinder GZ1 to GZ4, here the third rubber cylinder GZ3, becomes the backlash main engine M and rubber cylinder GZ3 most safely fixed.

The 3 shows a 9-cylinder satellite arrangement with auxiliary drive HM directly to the axis of the satellite cylinder SZ.

Around a centrally arranged satellite cylinder SZ are four rubber cylinders GZ1 to GZ4 arranged on which a blanket or a blanket plate or a rubber sleeve are stretched and each a printed image in one color on one between satellite cylinder SZ and the rubber cylinders Apply GZ1 to GZ4 running substrate.

The Printed image is initially on the printing plates or the plate sleeves of the plate cylinder PZ1 to PZ4, whereby inking units and dampeners the printing ink and dampening solution on the surface Apply the plate cylinder PZ1 to PZ4. The inking will be each by the four related Circles symbolizes and the dampening units are interconnected by the three Circles symbolizes.

Each a related one Plate cylinder PZ1 to PZ4 and a rubber cylinder GZ1 to GZ4 are about a Geared together drivingly connected; the gear connection is symbolized by a bold line. A main engine M thus drives a plate cylinder PZ1 to PZ4 and a rubber cylinder GZ1 to GZ4. The main drive motor M, the third plate cylinder PZ3 and the third blanket cylinder GZ3 drives, drives in addition to a Gear connection to the satellite cylinder SZ. About a clutch, the Satellite cylinder SZ be disconnected from the main drive motor M.

In addition to Main drive motor M, the third plate cylinder PZ3 and the third blanket cylinder GZ3 and the satellite cylinder SZ drives an auxiliary drive motor HM directly on the axis of the satellite cylinder SZ arranged.

at This drive assembly may be due to gear tolerances and Process-related by zero torque cycles or load changes of the main drive motors M to register errors in the printing process come.

When Register refers to the register from front to back in the printing process. This belongs to the Example, that the status of the pagina, the type area mirror or other Elements on both sides are the same.

If For example, a main drive motor M process insidiously passes through the torque zero crossing, then arises a frequent change the tooth flanks, which on the one hand to a wear-related Increase in gear tolerance Can and continues to control the gears. in this connection the changing tensioning moment in the drive train is crucial.

Around To avoid these tension moments is the auxiliary drive motor HM arranged during the the printing operation of the printing machine, the main drive motors M supported on the torque side positive or negative. Thus, torque changes or Lastmomentwechsel, the previously undesirable Register errors resulted, compensated become.

SZ

satellite cylinder

GZ1

first transfer cylinder

GZ2

second transfer cylinder

GZ3

third transfer cylinder

GZ4

fourth transfer cylinder

PZ1

first plate cylinder

PZ2

second plate cylinder

PZ3

third plate cylinder

PZ4

fourth plate cylinder

M

Main drive motor

HM

Auxiliary drive motor

Claims (9)

Printing unit of a web-fed rotary printing press with at least one transfer cylinder (GZ1 to GZ4) on which at least one forme cylinder (PZ1 to PZ4) is arranged and at least one inking unit applies ink to the forme cylinder (PZ1 to PZ4), wherein a substrate web between the transfer cylinder (GZ1 to GZ4 ) and an impression cylinder (GZ1 to GZ4, SZ) can be passed and at least one main drive motor (M) via gear connections, the transfer cylinder (GZ1 to GZ4), the forme cylinder (PZ1 to PZ4) and the impression cylinder (GZ1 to GZ4, SZ) drives, characterized in that at least one auxiliary drive motor (HM) is arranged, which supports the main drive motor (M) on the torque side positively or negatively during the printing operation of the printing press. Printing unit according to claim 1, characterized that the impression cylinder either as another transfer cylinder or as a satellite cylinder (SZ) is executed. Printing unit according to claim 1 or 2, characterized that this is constructed as a 9-cylinder satellite arrangement. Printing unit according to claim 1 or 2, characterized that this as a 10-cylinder satellite arrangement with two satellite cylinders (SZ) is constructed. Printing unit according to one of claims 1 to 4, characterized that to control the motors (M, HM) and to capture the current Cylinder position encoders are arranged, the encoders load side on the transfer cylinder (GZ1 to GZ4) and / or on the forme cylinder (PZ1 to PZ4) and / or on Satellite cylinders (SZ) are arranged. Printing unit according to one of claims 1 to 5, characterized that the auxiliary drive motor (HM) has a capacity of about 5% to 20% of the main drive motor (M), preferably 10% of the power, Has. Printing unit according to one of claims 1 to 6, characterized that at least one gear connection is arranged over the the auxiliary drive motor (HM) on the transfer cylinder (GZ1 to GZ4) and / or on the forme cylinder (PZ1 to PZ4) and / or on the Satellite cylinder (SZ) drives. Printing unit according to one of claims 1 to 6, characterized at least one belt is arranged over which the auxiliary drive motor (HM) is arranged on the transfer cylinder (GZ1 to GZ4) and / or on the forme cylinder (PZ1 to PZ4) and / or on the satellite cylinder (SZ) drives. Printing unit according to one of claims 1 to 6, characterized that the auxiliary drive motor (HM) directly on the axis of the transfer cylinder (GZ1 to GZ4) and / or the forme cylinder (PZ1 to PZ4) and / or of the satellite cylinder (SZ) is arranged.