EP1123802A1 - Compensation pour la déviation de transfert dans une machine à imprimer - Google Patents

Compensation pour la déviation de transfert dans une machine à imprimer Download PDF

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Publication number
EP1123802A1
EP1123802A1 EP01100781A EP01100781A EP1123802A1 EP 1123802 A1 EP1123802 A1 EP 1123802A1 EP 01100781 A EP01100781 A EP 01100781A EP 01100781 A EP01100781 A EP 01100781A EP 1123802 A1 EP1123802 A1 EP 1123802A1
Authority
EP
European Patent Office
Prior art keywords
printing
iii
transfer
cylinder
group
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP01100781A
Other languages
German (de)
English (en)
Other versions
EP1123802B1 (fr
Inventor
Holger Faulhammer
Bernhard Wagensommer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Heidelberger Druckmaschinen AG
Original Assignee
Heidelberger Druckmaschinen AG
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Publication date
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Publication of EP1123802A1 publication Critical patent/EP1123802A1/fr
Application granted granted Critical
Publication of EP1123802B1 publication Critical patent/EP1123802B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F7/00—Rotary lithographic machines
    • B41F7/02—Rotary lithographic machines for offset printing
    • B41F7/04—Rotary lithographic machines for offset printing using printing units incorporating one forme cylinder, one transfer cylinder, and one impression cylinder, e.g. for printing on webs
    • B41F7/06—Rotary lithographic machines for offset printing using printing units incorporating one forme cylinder, one transfer cylinder, and one impression cylinder, e.g. for printing on webs for printing on sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F21/00—Devices for conveying sheets through printing apparatus or machines
    • B41F21/10—Combinations of transfer drums and grippers

Definitions

  • the invention relates to a printing machine, preferably for printing on sheet-like material with at least two printing unit groups, which are different from each other decoupled drives and printing units assigned to each printing unit group Have transfer cylinders, and to transfer the printing sheet with a dynamic Control device and compensation elements for the compensation of Speed differences and position errors between two printing unit groups. Furthermore, the invention relates to a method for transferring printed sheets in one such printing machine.
  • Printing machines with a large number of printing units have the problem that their mechanical natural frequency moves to ever smaller values, the more printing units available. This natural frequency is already common today Print speeds are stimulated and contribute to a deterioration of the printed image at.
  • DE 197 42 461 A1 describes a device and discloses a method for the synchronization of printing unit groups.
  • the Device on a transfer station with a separate drive.
  • the separate one The drive is initially based on the operating parameters of the preceding printing group synchronized and the print sheet is taken over by the transfer station. Then it will be the drive of the transfer station synchronized to the subsequent printing group and the printed sheet is passed on to them.
  • the disadvantage of this device is that for a transfer station is required for each printing group.
  • considerable mechanical means are necessary to this Realize synchronization.
  • torque fluctuations remain disregarded by the transfer means such as Gripper systems are required.
  • a device which is arranged displaceably Has bow holder.
  • the bow holders are in the circumferential direction and in the axial direction of the transferring cylinder of the preceding printing group.
  • the difference in speed and position of the printed sheet is calculated determined. This is done by sensors and a control device for processing the Operating parameters. If there is a speed difference or a Position difference is determined, the corresponding bow holder is actuated by actuators in Direction of conveyance of the printed sheet and transversely to the calculated position and on hand over the following printing group. The actuators become accordingly controlled by the control device.
  • the disadvantage of this device is that a positional shift caused by the transfer is not taken into account by the position correction. That also has a disadvantageous effect Torque fluctuations caused by the transfer means and thus induced Speed change like that of gripper systems and dynamic bow holders generated are not taken into account by the position correction.
  • a solution to the problem is provided with the printing press according to the invention, compensating elements being assigned to the receiving printing group, preferably the first transfer cylinder of the receiving printing group.
  • compensating elements being assigned to the receiving printing group, preferably the first transfer cylinder of the receiving printing group.
  • This makes it possible for the speed difference to be compensated for only when the transfer has already been made.
  • the torque fluctuations which are caused, for example, by a dynamic gripper system, are taken into account with the compensation of the speed difference.
  • the position correction takes place after the handover, so that shifts that occur during the handover can still be corrected.
  • the transfer error can thus be compensated for directly, so that the data processing means of a control device can dispense with a generally incorrect calculation of a transfer error to be expected.
  • An embodiment of the invention is provided in that the dynamic Control device for recording operating parameters with the printing unit groups preferably with the individual printing units and to control the transfer with the Compensating elements is communicatively connected.
  • the immediate compensation of the Transfer error enables the operating parameters of the printing unit groups during the Take into account. This makes it necessary to change the operating parameters of the Provide control device without delay.
  • Advantageously differences in speed and position can be recognized immediately and the Compensating elements are controlled accordingly.
  • a further embodiment of the invention is provided in that sensors preferably charge-coupled switching elements (CCD), photo sensors, electronic or electromagnetic sensors that are assigned to the printing unit groups that the Record operating parameters of the printing unit groups and data processing equipment forward the dynamic control device.
  • CCD charge-coupled switching elements
  • photo sensors photo sensors
  • electronic or electromagnetic sensors that are assigned to the printing unit groups that the Record operating parameters of the printing unit groups and data processing equipment forward the dynamic control device.
  • the sensors can advantageously the rotational speeds of the cylinders, the conveying speed of the The printed sheet and the position of the printed sheet are recorded on the basis of the edge position.
  • the edge position of the printed sheet is advantageously based on the leading edge based on the conveying direction of the printed sheet, since this is from the sensors of the receiving group of printing units is recorded first.
  • the Operating parameters of the successive printing unit groups determined.
  • the compensating elements have Gripper system, which to compensate for a speed difference between two Printing unit groups and for correcting the position of the printing sheet parallel to Cylinder surface and axially displaceable on the first transfer cylinder receiving printing group is arranged.
  • Gripper system which to compensate for a speed difference between two Printing unit groups and for correcting the position of the printing sheet parallel to Cylinder surface and axially displaceable on the first transfer cylinder receiving printing group is arranged.
  • a dynamic actuator e.g. a piezoelectric or magnetostrictive element or a linear direct drive
  • a gripper bridge for Include the arches, with the actuator in the position of the gripper bridge constant radius in the circumferential direction of the transfer cylinder.
  • the speed difference is compensated for during the transfer and the position difference is advantageously corrected after the transfer if the Printed sheets only fixed by a pair of cylinders from the receiving printing group the final position shift can then be determined. This can if necessary take place directly in the printed image.
  • the device According to the invention, an arrangement of the cylinders of the printing unit groups through which after the transfer of the printing sheet by the gripper system of the transfer cylinder Printed sheets only fixed at one point in the receiving printing group is.
  • the gripper bridge can also advantageously be used axially to correct the position of the printed sheet be designed to be displaceable in the direction of the axis of rotation of the first transfer cylinder to enable the position correction.
  • Another advantageous solution is provided by a method for transferring printed sheets provided in a printing press.
  • a method variant is provided in that the dynamic Control device before the transfer of the sheet, the operating parameters of the Printing unit groups preferably detected by sensors, speed differences determined and controls the compensation elements during the transfer. As well the position of the printing sheet after the transfer on the first transfer cylinder of the receiving printing unit group and the compensating elements after the Corrective takeover controls.
  • the position correction before the transfer to the second cylinder is advantageously the receiving printing unit group completed, since after the transfer to the second Cylinder the printed sheet is fixed in two places and a position correction considerably more Effort required.
  • the steps are summarized so that in a first step to compensate for a speed difference the actuator parallel to the cylinder surface of the first transfer cylinder of the receiving one Printing unit group is moved, in a second step the gripper system of the first Transfer cylinder of the receiving printing unit group the printing sheet from the in a third step, the position of the Print sheet detected and, if necessary, a position correction is determined in one fourth step the position correction on the first transfer cylinder of the actuator takes over the printing group, in a fifth step the actuator Transfer to the second cylinder of the receiving printing group in a Rest position is spent and in a sixth step the actuator after handing over the Sheet to the second cylinder of the receiving printing group in his Starting position is reduced.
  • the actuator is positioned in its starting position, in which is the maximum compensatory movement in each direction at the next transfer can perform. During the transfer to the second cylinder of the recipient In the printing group, the actuator is at rest so that a shift in position after the Position correction is avoided.
  • Printing unit groups and error compensation when transferring printing sheets from one Printing unit group to the next By decoupling the printing press into several according to the invention Printing unit groups and error compensation when transferring printing sheets from one Printing unit group to the next, very long printing machines can be realized.
  • the length the printing press is by the inventive design and by Processes are no longer limited by mechanical influencing factors, but exclusively due to the increasing control engineering effort in error compensation several decoupled and separately regulated groups of printing units.
  • Fig. 1 shows a printing press 1 with several arranged in series Printing units 2 and 3.
  • a printing sheet is to be printed by the feeder 4 by the Printing units 2 and 3 transported to delivery 5.
  • the printing units 2 and the Feeders 4 are connected to each other by a gear train, which is indicated by an arrow 6 is pictured.
  • the drive of this printing group II together with the feeder 4 done by a motor 7.
  • the printing units 3 together with the delivery 5 are also connected by a gear train, which is represented by an arrow 8.
  • the drive for this printing group III together with the boom 5 is by accomplished an engine 9.
  • Between the two printing unit groups II and III the printed sheet of transfer means 10 from printing group II to Hand over printing group III.
  • An arrow 11 indicates the level of the transfer between printing unit groups II and III.
  • the transfer means 10 are in the example by an impression cylinder 12 and a transfer cylinder 13 are shown.
  • Level 11 also represents the decoupling of the printing unit groups, with the Impression cylinder 12 of printing group II the transfer cylinder 13 of Printing group III is assigned.
  • the printing sheet is from the impression cylinder 12 passed on to the transfer cylinder 13.
  • Transfer error compensation is a measure of the transfer error compensation.
  • the motors 7 and 9 are regulated by a control device 14.
  • the task of the control device 14 is to match the motors 7 and 9 accordingly to regulate a predetermined target speed so that the predetermined angular difference between the two printing unit groups II and III is not exceeded.
  • the maximal Difference depends on the dynamics of the drives.
  • the task of Control device 14 therein the operating parameters at the time of Determine the sheet transfer and transmit it to the compensating elements 15.
  • the Compensation elements 15 are not shown in the illustration and a gripper system 18 assigned to the transfer cylinder 13. With the compensating means 15 Transfer errors compensated according to the invention.
  • Figure 2 shows a coordinate representation of the speeds of the printing unit groups II and III over the machine angle in degrees.
  • Curve n 1 represents the speeds of printing group II from FIG. 1.
  • Curve n 2 represents the speeds of printing group III from FIG. 1.
  • the speeds of printing group II, n 1 fluctuate compared to the speeds of printing group III, n 2 .
  • Sections I-IV of the transfer show the task of the compensating means 15 consisting of a dynamic actuator 16 and a gripper system 17, 18.
  • the actuator 16 compensates for the speed difference between the printing unit groups II and III. This takes place during the transfer from the gripper system 17 of the printing group II to the gripper system 18 of the printing group III. For this purpose, the actuator 16 and thus the gripper system 18 are shifted by the phase difference A 1 . At point 21 the transfer of the printed sheet takes place.
  • the actuator 16 carries out a position correction A 2 between printing group II and printing group III after the printing sheet is only fixed by the gripper system 18 of the first transfer cylinder 13 of the receiving printing group III.
  • the position difference A 1 which has been induced by the torque fluctuations generated in section I by the gripper system 17, 18 or the actuator 16, must be taken into account.
  • the actuator 16 is held in a rest position.
  • the Printing sheet from the second cylinder 19 of printing group III corrected accepted.
  • the second cylinder 19 is shown as the first impression cylinder the printing group III.
  • FIG. 3 shows a flow chart for the control of the speed difference as it takes place when the printing sheet is transferred from a printing group II to printing group III.
  • the control device 14 can be designed as a PI controller and determines the displacement A 1 of the actuator 16 for a compensation of the speed difference between the two printing unit groups II and III.
  • the control device 14 controls the gripper system 18, which comprises the actuator 16 and the gripper bridge 20 with the printed sheet.
  • the actual position of the actuator 16 is used is n as a correction value for taking into account the respective displacement of the actuator sixteenth
  • FIG. 4 shows a flow diagram for the control of the position correction.
  • the control device Through the switch 23 the control device is provided, the position values of the printing sheet phi 1 and phi 2 are available 14, the resulting setpoint phi to the determined shift position A2. Subsequently, the shift A 1 of the actuator 16 and the gripper system 18 that is caused by the speed compensation is taken into account, as described for FIG. Is by a correction value phi the position of the actuator 16 is taken into account in the position correction. After the transfer of the printed sheet to the gripper system of the second cylinder 19, the actuator 16 is reset to zero via the switch 23 and moved back to the starting position by the displacement A 3 .
  • FIG. 5 shows a gripper system 18 on a transfer cylinder 13. It is in an axially extending channel 24 of an arc-guiding transfer cylinder 13 Printing machine 1 arranged gripper system 18 on an angular in cross-section Carriage 25 arranged. At the upper end of the upward sledge leg there is the gripper pad 26 for the gripper 27 of the on the slide 25th arranged gripper system 18.
  • the horizontally extending leg 28 of the Carriage 29 is arranged by means of roller bearings on a bearing plate, which in turn is on Rolling bearings in the axial direction of the transfer cylinder 13 is movable.
  • the electronic measuring elements for example also illuminable CCD line, arranged on at least one axial end of the transfer cylinder 13.
  • the latter CCD lines can be set depending on the format, as is known per se, and control the data processing means of the control device 14, as in FIG. 1 shown, the actuators for the displacement of the gripper system 18 on the carriage in the direction of the cylinder axis.
  • the Measured values of the electronic measuring elements on the gripper support 26 by the Control device 14 control pulses for the actuators for position correction in Direction of conveyance of the printed sheet and through the electronic measuring elements on the axial cylinder end control signals for the lateral position correction of the printing sheet won.
  • FIG. 6 shows a schematic illustration of cylinders during the transfer of a Printed sheet.
  • the cylinders are between two printing unit groups II, III so arranged that the transfer error compensation can take place according to the invention.
  • the Printing unit groups II and III are decoupled. The decoupling is through level 11 shown.
  • the printed sheet is from the gripper system 17 of the last sheet-guiding Cylinder of printing group II, which is shown as impression cylinder 12 hand over the gripper system 18 of the transfer cylinder 13 to the printing group III.
  • the printing sheet is from the first transfer cylinder 13 of printing group III passed on the second cylinder 19, which as the first impression cylinder Printing group III is shown.
  • the printed sheet is transferred to the Gripper system of the second cylinder 19 of the receiving printing group III only fixed at a point. In this situation, therefore, the position compensation of the printed sheet is on make cheapest.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)
  • Electrostatic Charge, Transfer And Separation In Electrography (AREA)
  • Handling Of Cut Paper (AREA)
  • Dot-Matrix Printers And Others (AREA)
  • Rotary Presses (AREA)
  • Printers Characterized By Their Purpose (AREA)
EP01100781A 2000-01-26 2001-01-13 Compensation pour la déviation de transfert dans une machine à imprimer Expired - Lifetime EP1123802B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10003141 2000-01-26
DE10003141A DE10003141A1 (de) 2000-01-26 2000-01-26 Übergabefehlerkompensation an Druckmaschinen

Publications (2)

Publication Number Publication Date
EP1123802A1 true EP1123802A1 (fr) 2001-08-16
EP1123802B1 EP1123802B1 (fr) 2005-12-14

Family

ID=7628681

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01100781A Expired - Lifetime EP1123802B1 (fr) 2000-01-26 2001-01-13 Compensation pour la déviation de transfert dans une machine à imprimer

Country Status (5)

Country Link
US (1) US6810806B2 (fr)
EP (1) EP1123802B1 (fr)
JP (1) JP4782292B2 (fr)
AT (1) ATE312717T1 (fr)
DE (2) DE10003141A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6823792B2 (en) * 2001-07-26 2004-11-30 Heidelberger Druckmaschinen Ag Multi-motor drive and method for driving a printing press
JP4829529B2 (ja) * 2005-04-28 2011-12-07 株式会社小森コーポレーション 印刷機
JP5500800B2 (ja) 2008-08-13 2014-05-21 株式会社小森コーポレーション 処理機の駆動方法及び装置
JP2010094858A (ja) * 2008-10-15 2010-04-30 Komori Corp 処理機の駆動制御方法及び装置
JP5209443B2 (ja) * 2008-11-04 2013-06-12 株式会社小森コーポレーション 処理機の駆動制御方法及び駆動制御装置
JP5395284B2 (ja) * 2013-01-07 2014-01-22 株式会社小森コーポレーション 処理機の駆動制御方法及び駆動制御装置

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4406740A1 (de) * 1994-03-02 1995-09-07 Heidelberger Druckmasch Ag Vorrichtung zur Passerkorrektur in einer Druckmaschine

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3138540A1 (de) * 1981-09-28 1983-04-14 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach Vorrichtung zum zufuehren von auf einem anlegertisch vereinzelten und nach vorder- und seitenkante ausgerichteten bogen
ZA84910B (en) * 1983-03-26 1984-09-26 Heidelberger Druckmasch Ag Method for aligning sheets
DE3913339A1 (de) * 1989-04-22 1990-10-25 Koenig & Bauer Ag Seiten- und umfangsregistereinstellvorrichtung fuer eine registertrommel einer bogenrotationsdruckmaschine
US5481971A (en) * 1991-11-19 1996-01-09 Heidelberger Druckmaschinen Ag Drive for a printing press with a plurality of printing units
DE4200406C2 (de) * 1992-01-10 1996-10-10 Heidelberger Druckmasch Ag Greifereinrichtung an bogenverarbeitenden Rotationsdruckmaschinen
DE4221929C2 (de) * 1992-07-03 1997-11-20 Heidelberger Druckmasch Ag Greifersteuerung für Bogengreifer an einem bogenführenden Zylinder oder dergleichen in einer Druckmaschine
US5383392A (en) * 1993-03-16 1995-01-24 Ward Holding Company, Inc. Sheet registration control
DE4434624C2 (de) * 1994-09-28 1997-11-20 Heidelberger Druckmasch Ag Vorrichtung zur Passerkorrektur und zum Ausgleich verspannter Bogen im Anleger einer Bogenrotationsdruckmaschine
DE19618029B4 (de) * 1996-05-04 2006-07-27 Heidelberger Druckmaschinen Ag Verfahren und Vorrichtung zur Beseitigung von rhytmischen Passerfehlern in Bogendruckmaschinen mit mehrfachgroßen Zylindern
DE19742461C2 (de) * 1997-09-26 2001-05-10 Heidelberger Druckmasch Ag Vorrichtung zum Antrieb einer Bogendruckmaschine mit Mehrmotorenantrieb

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4406740A1 (de) * 1994-03-02 1995-09-07 Heidelberger Druckmasch Ag Vorrichtung zur Passerkorrektur in einer Druckmaschine

Also Published As

Publication number Publication date
ATE312717T1 (de) 2005-12-15
JP2001253049A (ja) 2001-09-18
JP4782292B2 (ja) 2011-09-28
DE50108350D1 (de) 2006-01-19
DE10003141A1 (de) 2001-08-02
EP1123802B1 (fr) 2005-12-14
US20010013292A1 (en) 2001-08-16
US6810806B2 (en) 2004-11-02

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