SU1097512A1 - Drive for web-fed multiunit rotary press - Google Patents

Abstract

DRIVE MULTI-SECTIONAL ROTATIONAL PRINTING MACHINE DRIVE, containing differential gears connected with the shafts of printing and forming cylinders of printing sections and d shafts of chopping and folding cylinders of folding sections, and automatic control system of longitudinal / feZ-)) (L with automatic register belts with follower means and amplifying and converting means, characterized in that, in order to increase the print quality, the automatic control system has electromagnetic clutches associated with The alai of the plate and folding cylinders of the printing and folding sections, respectively, and with the amplifier and converter means, and the next tool has electrically connected with the amplifier and converter means the sensors of the angle of rotation and speed of the shaft of the plate and folding cylinders, as well as sensors in front of the printing and folding sections.

Description

The invention relates to printing machinery and can be used, for example, in roll rotary printing machines and assemblies, as well as in other machines and assemblies of both printing and other branches of engineering, in which the sectional principle is used. A known drive of a multi-section rotary roll printing machine, comprising differential gears associated with the shafts of the printing and plate cylinders of the printing sections and the shafts of the cutting and folding cylinders of the folding sections, and an automatic control system for the longitudinal register of the printed tape with the following means and amplifying means 1 However, in the known drive, there is no connection between the parameters of the state and movement of the belt and the working bodies — the cylinders of the printing and folding sections. As a result, the introduction of an automatic control system for longitudinal register correction in the ribbon movement is carried out without taking into account the movement of the working bodies, which causes a lack of accuracy and reliability of the synchronization of the movement of the working bodies and the ribbon and degrades print quality. In addition, to synchronize the movement of the working bodies of the printing and folding sections, a bulky shaft corresponding to the length of the entire printing press is used, which deteriorates the conditions of its maintenance, increases the metal intensity of the machine, and also increases the energy consumption for its drive. The purpose of the invention is to improve the quality of printing. This goal is achieved in that the drive of a multi-sectional roll press that contains differential gears associated with the shafts of the printing and printing cylinders of the printing sections and the shafts of the chopping and folding cylinders of the folding sections, and an automatic control system for the longitudinal register of the printed tape with the following means and an amplifier-converter means, the automatic control system has electromagnetic clutches connected to the shafts of the forming and folding cylinders but the printing and folding sections and with the amplifier-converting means, and the following means has electrically connected with the amplifier-converting means angle sensors and speeds of the shafts of the forming and folding cylinders, as well as belt tension sensors installed in front of the printing and folding sections . Fig. 1 shows a kinematic diagram of the drive of a multi-section rotary printing machine with the following and actuating means of an automatic belt longitudinal register system and differential drive of working bodies at the inputs of the printing and folding sections, respectively, of printing and chopping cylinders; in fig. 2 shows the location of the angle of rotation and speed sensors of the plate (folding) cylinder of the follower means and the electromagnetic clutch associated with this cylinder; in fig. 3 is a schematic diagram of an automatic longitudinal register control system; in fig. 4 is a kinematic diagram of a differential drive of one of the printing sections from an individual electric motor; in fig. 5 is a kinematic scheme of a multi-motor drive of the printing and folding sections of a multi-section rotary printing press with the drive of working bodies at the inputs of the sections from individual electric motors by means of simple gears. The drive of a multisection rotary wheel press (Fig. 1) contains one drive motor 1 or sectional motors 2. The shaft of the electric motor 1 is connected to the carrier 3 of the differential gear, carrying satellites 4, which engage with the central driven gears 5 and 6, fixed respectively on the shaft 7 and on the housing 8. On this housing there is also fixed a gear wheel 9 connected by means of gear 10 and gears 11 with a cutting 12 and folding 13 cylinders, and then by means of gear gears lines 14 and 15 and shaft 16 with a ribbon-shaped cylinder 17. Shaft 7 is the leader in the second differential gear, which also links the first and second printing units. The carrier is mounted on the shaft 18 with satellites 19 connected to the driven central gear wheels 20 and 21. The wheel 20 is rigidly connected to the bevel gear wheel 22, and through the conical gear wheels 23 and the shaft 24 to the printing cylinder 25 working in conjunction with by the forme cylinder 26. The connection between these cylinders is made in the form of an engagement of cylindrical gear wheels mounted on the shafts of these cylinders (or on the ends of the cylinders themselves). The gear 21 is rigidly mounted on the shaft-27, which is the leading and differential gear that connects, for example, the second and third printing units. The second sectional motor 2 (in the case of a multi-motor drive) is connected to the drive via gear 28 with shaft 27. The drive shafts are interconnected by couplings 29. The last printing unit 30 is driven from the driven shaft 31 of the previous differential gear through a simple gear gear 32.

The next device (Fig. 1 and 2) contains a sensor 33 of the angle of rotation of the form (folding, tape-driving) cylinder induction, the sensor 31 of the speed of this cylinder. They are directly connected to the shafts of these cylinders. The device has a tension sensor of a sealed tape consisting of a tape-adhering roller 35 fixed on levers 36 swinging freely on an axis and mounted between the stops, on one of which a piezoelectric pressure sensor 37 is fixed. On the shaft of a plate cylinder there is also a movable part of an electromagnetic powder coupling 38.

A schematic diagram of an automatic longitudinal drive control system (shown in Fig. 3 in the form of a block circuit with its detail for testing one of the disturbances - deviation of the relative position of the forming and folding cylinders) shows the formation of signals proportional to the angles of rotation of the forming and folding cylinders by sensors 33 (Fig. 1 and 2). The formation and conversion of signals from the speed sensors of the form (folding and tape-carrying) cylinders, from the tension sensors of the printed tape, as well as from sensors fixing the position of the reference marks on the tape, is carried out by known methods and is not reflected in the block diagram.

The circuit diagram (Fig. 3) shows the connection of the generator 39, which supplies power through the phase-shifting chain 40 and the stator amplifier 41 and 42 with a shift of 90 °, the stator windings 43, 43g, etc. induktsinov 36 (Fig. 1 and 2), which provides for the creation of a rotating magnetic field. The stator windings are rigidly connected with the bed of the machine, and the rotor windings - with the shafts of forming, folding and ribbon-leading cylinders or with the cylinders themselves. The voltage phase change at the terminals of the rotor windings of the induction coils, caused by the rotation of these cylinders, after passing through the rotor amplifier 44 and the phase shifter 45, is one of the inputs of the phase-sensitive rectifier 46, the second input of which is connected to the generator 39. The rectifier output voltage 46 is in the form of signal D Y proportional to the angle of rotation of the first cylinder, together with the converted signals from other sensors, for example, for the first cylinder: D Fj - from the tension sensor of the printed tape before the first cylinder, - from Occupancy rate (e.g., tacho) of the first cylinder 1 A n - of photoelectric sensors follower for reference marks on tape flap, d .j -

from the phase-sensitive rectifier in the chain controlling the position of the second cylinder, are the input of the summing device 47 (. The signal received at its output after passing the amplifier 48f is the input of the actuator - an electromagnetic brake, made in the form of an electromagnetic powder clutch 38j, the fixed part of which mounted on the base of the machine, and its movable part on the shaft of the plate (or folding or tape-driving) cylinder and connected to the rotor of the phase shifter 41, which can be made nap Emer, combined with inductosyn. These communication between said elements displayed in FIG. 3 by double lines.

The connection with the elements of the automatic longitudinal register control system interacting with the working bodies of other sections of the machine (printing, folding) or ribbon-driving cylinders is similar to that described above. The purpose of the inductosines 43 in this is to measure with high accuracy the angle of rotation of the forming, folding and tape-carrying cylinders relative to a fixed reference system — a base frame for the purpose of determining, with the help of a given control system, the relative (phase) position of these cylinders.

The purpose of the electromagnetic brakes 38 is to regulate the relative angle of rotation of the forming, folding, and ribbon-leading cylinders due to the required change in the braking torque, the value of which is determined by the automatic drive control system described above. Thereby, the phase position of the forming, folding, and ribbon-holding cylinders is controlled relative to each other, and therefore, the longitudinal register of the printing, chopping and folding of the tape. In this case, rotation of the movable part of the coupling 38, and hence of the rotor of the phase shifter 45, reduces to zero the error signal at the output of the summing device 47. Thus, the phase change caused by the rotation of the inductosin rotor, which is associated with the corresponding cylinder (plate, folding, tape-dried), as well as changes in the speed of its rotation, belt tension and label shifting, is fully compensated.

The drive of the printing unit (Fig. 4) contains a sectional electric motor 2 connected by means of a gear train 49 with a planet carrier 50 carrying satellites 51 made in the form of conical gear wheels. Satellites 51 drive two slave central bevel wheels 52 and 53. Bevel gear 52 is rigidly connected to a cylindrical wheel 54 fixed on the shaft of the printing cylinder 25, and wheel 54 with a wheel 55 fixed on the shaft of the plate cylinder 26. Wheel 53 St. This is due to the weakness of the shaft with the rotor 56, for example, an electric generator. The kinematic drive circuit (figure 5) also contains sectional motors, for example, 1 for folding and 3 for driving the printing section. These electric motors are connected to the working bodies at the inlets of the section directly by means of gears. Electromagnetic brake clutches installed on the plate, folding cylinders. The use of elements of an automatic control system for longitudinal register of a tape is analogous to their use in the devices shown in FIG. 1-3. The drive (Fig. I) works as follows. The rotation of the shaft of the electric motor 1 by means of a carrier 3 with satellites 4 is transmitted to two driven gears 5 and 6 connected respectively to the driven shaft 7 and the housing 8. The rotation of the housing through the gears 9 and 10 and the gear transmission 11 is transmitted to the cutting 12 and folding 13 cylinders folding machine. Along with these cylinders, pull rollers (not shown) can also be connected to the gear unit. Through the bevel gear train 14 and 15 and the shaft 16, rotation from the folding cylinder is transmitted to the ribbon bending cylinder 17 (it is possible to drive the ribbon bending cylinder from an individual motor). The drive shaft 7 of the first differential gear in question is the lead for the second gear that drives the first print section and the drive shaft of the third differential gear, in turn, transmitting motion, for example, the second print section and the fourth differential drive shaft gears, etc. The carrier 18 transmits rotation to the driven central gear wheels 20 and 21 by means of conical gear slats 19. The movement from the wheel 20 is transmitted to the conical gear wheel 22 rigidly connected with it and then through the conical gear wheels 23 and the shaft 24 to the printing cylinder 25. Paired with the latter the platen cylinder rotates 26. Connecting the other sections to the actuator is similar to those described above. In the case of using this drive for machines with a large number of sections and for large-format machines, it is necessary to unload the drive for transferring motion not from one but from several electric motors. The connection of such sectional motors, for example 2, is made to the differential transmission drive shaft, as shown in FIG. 1, through shchestane 28. Connecting sections (printing and folding) to the drive is made through couplings 29, allowing the combination of the number of sections involved in the work. When any section is disconnected, the connection between the remaining sections can be accomplished, for example, by rigidly fixing the satellites to the appropriate distance or using a coupling coupling between the carrier and the shaft of the driven central wheel of the differential gear of the section to be disconnected, reporting movement to the next section (not shown) . The use of differential gears for driving printing and folding sections, controlled by an automatic system of longitudinal registration by means of actuators, for example, electromagnetic brakes, made in the form of electromagnetic powder couplings, allows you to adjust the relative position of the working bodies of these sections (plate and folding cylinders) by adjusting the moments resistance (braking torques) applied to these organs. The magnitude of the braking torque is determined by the automatic longitudinal register control system (Fig. 3). In this automatic system, the signals received (and converted) from the angle sensors 33 (Fig. 1 and 2) and 43 (Fig. 3) of the plate and folding cylinders (inductosyn) DT, from the sensors of their angular velocity 34 (Fig. 1 and 2) —the tachogenerators of the tension sensors 37 (Fig. 1) of the sealed tape (piezoelectric pressure sensors) —L F, as well as from photoelectric sensors fixing the position of the control marks on the printed tape D1, are deposited on the adder 47 (Fig. 3 ) and converted to a control action - power supply voltage of the cat electromagnetic clutch 38. As a result of the braking torque from the electromagnetic clutch to the corresponding plate and folding cylinders, torque is redistributed to the driven parts of differential gears associated with the working parts at the inputs of printing and folding devices (with printed and rub cylinders, respectively), and through them with working bodies at the outlets of these devices, i.e. with plate and folding cylinders, respectively, as a result of which the relative position of these cylinders changes, and therefore, longitudinal register is controlled. Thus, in this system of longitudinal registration, the controlling effect on the executive bodies — electromagnetic brakes is generated not only by taking into account (measuring) the deviation in the combination of paints in multicolor prints, but also by taking into account the deviations in the movement of the working bodies of printing and folding machines. and sealed tape (phase misalignment of the plate and folded cylinders, deviations of the angular velocities of these cylinders from each other and the tension of the tape being sealed in front of them), especially noticeable about appearing in the transition .nye modes of the machine.

The use of the proposed longitudinal register control device ensures that a large number of parameters are taken into account, characterizing their relative position of the working bodies of printing and folding machines, as well as the images on the printed tape relative to these cylinders, increasing the speed and accuracy of signal processing, detecting deviations of these positions, eliminating the effect of gaps in gears to the working bodies of printing and folding machines, maintaining constant torque in gears to the working bodies of printing and folding machines. The latter is achieved both under steady-state and transient operating modes of the drives in conjunction with an automatic longitudinal register control system due to the sensors fixing the relevant parameters characterizing the interconnected behavior of the drives and tape drives, and working off their deviation by redistributing the automatic system and differential closed load drive, acting on the printing and folding machines in such a way that the relative position of the plates, folding plates ndrov flap and tape remains unchanged.

In the case of the application of a multi-motor drive of a roll-type rotary machine, the printing and folding sections, which are not mechanically interconnected (and possibly tape-locking cylinders), can also be carried out from individual (sectional) electric motors using a differential mechanism.

In the drive (FIG. 4), rotation from the sectional electric motor 2 is transmitted via gear 49 to the carrier 50 with differential gear satellites 51. From the carrier, movement is transmitted to two m. Driven central wheels 52 and 53 along two branches of the differential drive. The first branch consists of gears composed of gears 52, 54 and 55 and designed to drive the working bodies of the printing pair. The second branch contains a conical wheel 53 connected by a shaft to the rotor 56

electric generator. At the same time, on the side of the rotor 56 of the electric generator, the driven gear wheel 53 has a reactive torque, which is the reference moment for

this drive. The longitudinal register control is carried out both by changing the resistance of the external circuit using an automatic control system, as a result of which the reference moment on the wheel 53, and therefore on the wheel 55, and the braking moment on the shaft of the forme cylinder 26 is also changed by means of an electromagnetic clutch 38 (FIG. 2), as well as a joint change in these parameters. At the same time, the torques acting on the drive of the plate

The 2 (folding, ribbon-carrying) cylinders in different sections can be changed with the help of an automatic system in such a way as to ensure a constant phase matching of the form (folding and ribbon-blind) cylinders as at

0 steady-state and under transient operating conditions of the drive.

In the device shown in FIG. 5, the automatic control system of the longitudinal register of the tape to be sealed by means of electromagnetic brake couplings 38 on the shafts of the forming and folding cylinders and through the use of sectional electric motors 2 with a soft mechanical characteristic provides

0 differentiated distribution of power of sectional motors in different sections depending on the values of resistance acting on their working bodies, and consequently the regulation of the relative position of working bodies

printing and folding machines and printed tape, necessary to provide a given register. For stable operation of the electric shaft and reduction of inrush current when synchronized printing and folding machines are turned on, prior to their acceleration, an auxiliary phasing operation is performed, in which the rotors of sectional electric motors receive an in-phase position in space. The described multisection machines with

5 for multi-motor systems of the electric drive, to ensure the same laws of motion of the working bodies, at the inputs of the printing and folding machines have between these bodies an electric synchronous connection -: electric shaft.

Thus, the use of the proposed device for controlling longitudinal register based on the use of a closed-loop drive with electric synchronous coupling is electric

The 5 shaft is at the input of printing and folding machines (printing and cutting cylinders, respectively), and electrically connected by means of electromagnetic couplings at the output of these devices (plate and folding cylinders, respectively), controlled by the automatic longitudinal registration system of the tape, ensures the accuracy and speed of phasing of the forming and folding cylinders, which is necessary to provide the required register in all modes of operation of printing machines. This ensures the accuracy of the longitudinal

registrations of the sealed tape, and therefore, improving the quality of multi-color printing, folding and cutting of the tape.

Replacing the mechanical connection between the sections (printing and folding machines) of the machine greatly simplifies the design of the drive of the machine, reduces its intensity and improves service.

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Claims (1)

DRIVE OF A ROLLED MULTI-SECTIONAL ROTARY PRINTING MACHINE, containing differential gears associated with the shafts of the printing and plate cylinders of the printing sections and d shafts of the chopping and folding cylinders of the folding sections, and an automatic control system for the longitudinal register of the printing tape with tracking means and amplification-converting means by that. that, in order to improve print quality, the automatic control system has electromagnetic couplings connected to the shafts of the plate and folding cylinders of the printing and folding sections, respectively, and the amplification-converting means, and the tracking means has rotation angle and speed sensors electrically connected to the amplifying-converting means shafts of plate and folding cylinders, as well as tape tension sensors installed in front of the printing and folding sections. ? 1L. 1 ss