EP1068076A1 - Procede de positionnement d'organes de gravure - Google Patents

Procede de positionnement d'organes de gravure

Info

Publication number
EP1068076A1
EP1068076A1 EP99924764A EP99924764A EP1068076A1 EP 1068076 A1 EP1068076 A1 EP 1068076A1 EP 99924764 A EP99924764 A EP 99924764A EP 99924764 A EP99924764 A EP 99924764A EP 1068076 A1 EP1068076 A1 EP 1068076A1
Authority
EP
European Patent Office
Prior art keywords
engraving
position marks
axial
printing cylinder
reference position
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.)
Withdrawn
Application number
EP99924764A
Other languages
German (de)
English (en)
Inventor
Bernd LÜBCKE
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
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Heidelberger Druckmaschinen AG filed Critical Heidelberger Druckmaschinen AG
Publication of EP1068076A1 publication Critical patent/EP1068076A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
    • B41C1/00—Forme preparation
    • B41C1/02—Engraving; Heads therefor
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T409/00—Gear cutting, milling, or planing
    • Y10T409/30—Milling
    • Y10T409/303752—Process

Definitions

  • the invention relates to the field of electronic reproduction technology and relates to a method for positioning engraving elements in an electronic engraving machine for engraving printing cylinders for gravure printing, in which at least two engraving strands of predetermined strand widths lying next to one another in the axial direction of the printing cylinder, each with an associated engraving element be engraved, as well as a device for generating reference position marks for the positioning of the engraving members and an engraving machine for performing the method.
  • an engraving element moves in the axial direction along a rotating printing cylinder.
  • the engraving element is designed, for example, as an electromagnetic engraving element with an engraving stylus as a cutting tool.
  • the engraving stylus which is controlled by an engraving control signal, cuts a sequence of cups of different depths arranged in an engraving grid into the lateral surface of the printing cylinder.
  • the engraving control signal is formed by superimposing an image signal which represents the tonal values to be engraved between "light" (white) and "depth” (black) with a periodic raster signal. While the periodic raster signal causes the engraving stylus to vibrate to generate the engraving raster, the image signal values determine the depths of the cells engraved in the outer surface of the printing cylinder and thus the engraved tonal values.
  • a large number of strip-shaped cylinder areas, called engraving strands, lying axially next to one another must often be engraved with one engraving element, for example the different printed pages of a print job.
  • the engraving elements assigned to the individual engraving strands are mounted on a common engraving carriage, which moves along the printing cylinder in the axial direction during the engraving.
  • the axial spacing of the engraving stylus tips of the engraving elements must be adjusted to the required widths of the individual engraving strands by axially shifting the engraving elements on the engraving carriage.
  • the engraving carriage with the precisely spaced engraving elements is then positioned relative to the printing cylinder in such a way that the engraving stylus tips lie in the axial starting positions for the engraving of the engraving strands.
  • an operator roughly sets the required axial distances by manually moving the engraving elements, for example using position marks or using a measuring tape.
  • the manual rough positioning of the engraving elements saves time in particular when a large number of engraving strands are to be engraved and thus a large number of engraving elements have to be positioned. After the rough positioning, the precise positioning of the engraving elements is then carried out using various methods.
  • the object of the present invention is to provide a method for positioning engraving elements in an electronic engraving machine, a device for generating and displaying reference position marks for positioning the engraving elements, and an engraving machine for carrying out the method, with which the positioning of engraving elements is facilitated and in short - zester time is carried out.
  • Fig. 1 is a basic block diagram of an engraving machine for printing cylinders
  • Fig. 2 shows an embodiment of a device for generating reference position marks.
  • FIG. 1 shows a basic block diagram of an engraving machine for engraving printing cylinders for gravure printing.
  • the engraving machine is, for example, a HelioKlischograph "from Hell Gravure Systems GmbH,
  • a pressure cylinder (1) is driven in rotation by a cylinder drive (2).
  • the engraving elements (3) which are designed, for example, as electromagnetic engraving elements with engraving styluses (4) as cutting tools, are located on an engraving carriage (5) on which they can be manually shifted and locked in the axial direction of the printing cylinder (1).
  • the engraving carriage (7) moves it via a spindle (6) in the axial direction of the printing cylinder (1).
  • the engraving elements (3) can also be individually coupled to the spindle (6) by means of spindle nuts. In this case, the common engraving carriage (5) is omitted. - 4 -
  • the engraving stylus (4) of the engraving elements (3) cut engraving line by engraving line a series of cells arranged in a printing grid into the outer surface of the rotating printing cylinder (1), while the engraving carriage (5) with the engraving elements (3) move in the feed direction on the printing cylinder (1) moved along.
  • the cups are engraved on individual engraving lines which run in a circular manner in the circumferential direction around the printing cylinder (1), the engraving carriage (5) carrying out an axial feed step to the next engraving line on each engraving line after the engraving of the cups.
  • the engraving stylus (4) of the engraving elements (3) are controlled by engraving control signals (GS).
  • the engraving control signals (GS) are formed in engraving amplifiers (8) from the superimposition of a periodic raster signal (R) on a line (9) with image signal values (B) which define the tonal values of the cells to be engraved between "light" (white) and "depth”"(Black) represents. While the periodic raster signal (R) causes the engraving stylus (4) to vibrate to generate the engraving raster, the image signal values (B) determine the respective geometric dimensions, such as depth of penetration, transverse diagonal and longitudinal diagonal, into the outer surface of the printing cylinder (1 ) engraved cells.
  • the analog image signal values (B) are obtained in D / A converters (10) from engraving data (GD) which are stored in engraving data memories (11) and are read from these engraving lines for engraving lines and fed to the D / A converters (10)
  • Each engraving location for a well on the printing cylinder (1) is assigned an engraving date of at least one byte, which, among other things, contains the tonal value to be engraved between "light” and "depth” as engraving information.
  • the engraving locations for the cells specified by the engraving grid are defined by location coordinates (x, y) of an XY coordinate system assigned to the printing cylinder (1), its Y axis in the circumferential direction (engraving direction) of the printing cylinder (1) and its X axis are oriented in the axial direction of the printing cylinder (1) (feed direction).
  • the engraving carriage drive (7) generates the x-location coordinates in the feed direction, which define the axial positions of the engraving carriage (5) in relation to the printing cylinder (1).
  • a position transmitter (12) mechanically coupled to the printing cylinder (1) generates the corresponding y-location coordinates in the engraving direction.
  • the location coordinates (x, y) are fed via lines (13, 14) to a control unit (15) which controls the engraving process.
  • the control unit (15) generates three reading cycle sequences (T) on a multiple line (16) for reading out the engraving data (GD) from the engraving data memories (11), a feed command (S ⁇ on a line (17) to the engraving carriage drive (7) for control the gradual feed of the Gravierwage ⁇ s (5) and the raster signal (R) on the line (9).
  • the engraving elements (3) are set so that they correspond to the specified strand widths (SB).
  • the operator initially roughly positions the engraving elements (3) on the approximate strand widths (SB) by manually axially moving the engraving elements (3) on the engraving carriage (5).
  • a fine positioning of the engraving stylus (4) of the engraving elements (3) is then carried out under visual observation by the operator. The fine positioning takes place, for example, with the aid of a special microscope device (stylus assignment gauge) and manually operable spindle drives on the engraving carriage (5).
  • the engraving carriage (5) is then axially displaced such that the engraving stylus tips of the engraving elements (3) are positioned on the start engraving lines of the individual engraving strands (A, B, C) on the printing cylinder (1), and the engraving can begin .
  • axial reference position marks are generated depending on the engraving parameters "number of engraving strands" and "strand width", the number of which is to be engraved - 7 -
  • Engraving strands (A, B, C) corresponds and their axial distances from each other match the desired strand widths (SB).
  • Corresponding position marks (19) are attached to the engraving elements (3).
  • the operator advantageously only has to align the position marks (19) of the engraving elements (3) with the associated reference position marks (18) by axially displacing the individual engraving elements (3).
  • the engraving machine has a device (20) for generating and displaying the reference position marks (18).
  • the device (20) is aligned with its longitudinal extent in the axial direction or feed direction and is attached to the axially displaceable engraving carriage (5).
  • the device (20) is actuated as a function of the specified engraving parameters by corresponding control commands (S 2 ) on a line (21) from the control unit (15).
  • a frequency transmitter (23) which can be controlled in frequency is attached to one end of the tube (22), and a light source (24) for generating visible light is attached to the other end.
  • the sound propagating in the glass of the tube (22) and / or in the air space of the tube (22) generates a standing sound wave (25) with wave nodes (26) in the tube (22), the first wave node (26) in the Area of the sound generator (23) and the last wave node are in the area of the light source (24).
  • Particle deposits form at the shaft nodes (26), which are made visible to the outside as reference position marks (18) with the aid of the light source (24).
  • the glass powder can also be mixed with a fluorescent substance, the light source (24) being designed as a UV light source.
  • the distance between two wave nodes (26) corresponds to half the wavelength ( ⁇ 2) of the standing wave (25).
  • the wavelength ( ⁇ ) can be changed via the frequency (f) of the standing wave (25).
  • the distance (L) between the end faces of the sound generator (23) and the light source (24), which is a multiple of half the wavelength ( ⁇ / 2), can be adjusted by axially shifting the sound generator (23) and / or the light source ( 24) adapt to the requirements.
  • the number of reference position marks (18) to be generated or the number of shaft nodes (26) to be generated is equal to the number n of engraving strands (A, B, C) to be engraved on the printing cylinder (1).
  • the distance between the reference position marks (18), which corresponds to half the wavelength ( ⁇ / 2), is equal to the predetermined strand width (SB) of the engraved strands (A, B, C) to be engraved.
  • the first and last wave nodes (26) on the mutually facing end faces of sound generator (23) and light source (24) are used to generate the reference position marks, the distance (L) to be set between sound generator (23) and light source results (24) and the frequency (f) to be set on the sounder (23) at a speed of sound (c) to:

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacture Or Reproduction Of Printing Formes (AREA)

Abstract

L'invention concerne un procédé et un dispositif destinés au positionnement des organes de gravure d'une machine à graver électronique destinée à la gravure de cylindres d'impression par héliogravure. Au moins deux billettes de gravure (A, B, C) du cylindre d'impression (1), juxtaposées dans le sens de l'axe du cylindre d'impression (1) et de largeurs données (SB), sont respectivement gravées sous forme de godets par un organe de gravure (3) associé. Avant la gravure, il faut régler les distances axiales qui séparent les organes de gravure (3), aux largeurs de billettes (SB) nécessaires. Pour économiser du temps, on effectue d'abord un réglage approximatif manuel des distances axiales séparant les organes de gravure (3). Dans un dispositif (20), on produit des marques de position axiale de référence (18) délimitant des distances axiales qui correspondent aux largeurs de billettes (SB). Les organes de gravure (3) présentent des marques de position axiales (19). Lors du positionnement approximatif, on déplace manuellement les organes de gravure (3) jusqu'à ce que leurs marques de position (19) coïncident avec les marques de position de référence (18). Une fois le positionnement approximatif manuel effectué, on procède à un positionnement fin des organes de gravure (3).
EP99924764A 1998-04-03 1999-04-03 Procede de positionnement d'organes de gravure Withdrawn EP1068076A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19814939 1998-04-03
DE19814939A DE19814939A1 (de) 1998-04-03 1998-04-03 Verfahren zum Positionieren von Gravierorganen
PCT/DE1999/001014 WO1999051436A1 (fr) 1998-04-03 1999-04-03 Procede de positionnement d'organes de gravure

Publications (1)

Publication Number Publication Date
EP1068076A1 true EP1068076A1 (fr) 2001-01-17

Family

ID=7863466

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99924764A Withdrawn EP1068076A1 (fr) 1998-04-03 1999-04-03 Procede de positionnement d'organes de gravure

Country Status (5)

Country Link
US (1) US6540453B1 (fr)
EP (1) EP1068076A1 (fr)
JP (1) JP2002510570A (fr)
DE (1) DE19814939A1 (fr)
WO (1) WO1999051436A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1310088A1 (fr) * 1999-10-19 2003-05-14 Hell Gravure Systems GmbH Procede pour la gravure de cylindres d'impression
EP1369230A1 (fr) * 2002-06-05 2003-12-10 Kba-Giori S.A. Procédé de fabrication d'une plaque gravée
US20060279793A1 (en) * 2004-07-30 2006-12-14 Hell Gravure Systems Gmbh Printing form processing with a plurality of engraving tool tracks forming lines
ITBO20040652A1 (it) * 2004-10-21 2005-01-21 Gd Spa Unita' per goffratura e metodo per la sua realizzazione
CN101733461B (zh) * 2008-11-12 2013-01-09 沈阳黎明航空发动机(集团)有限责任公司 一种整体叶盘叶片分段刚性铣削工艺

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2513042C3 (de) * 1975-03-25 1981-07-30 Dr.-Ing. Rudolf Hell Gmbh, 2300 Kiel Verfahren zum ortsgenauen Einstellen des Beginns und Endes der Reproduktion
DE2705993C2 (de) * 1977-02-12 1982-11-25 Dr.-Ing. Rudolf Hell Gmbh, 2300 Kiel Verfahren zum ortsgenauen Einstellen des Beginns der Abtastung bzw. Aufzeichnung einer Vorlage bei der elektronischen Druckformherstellung
US5438422A (en) * 1993-02-25 1995-08-01 Ohio Electronic Engravers, Inc. Error detection apparatus and method for use with engravers
US5663802A (en) * 1993-02-25 1997-09-02 Ohio Electronic Engravers, Inc. Method and apparatus for engraving using multiple engraving heads
US5440398A (en) 1993-02-25 1995-08-08 Ohio Electronic Engravers, Inc. Error detection apparatus and method for use with engravers
US5492057A (en) * 1994-05-12 1996-02-20 Ohio Electronic Engravers, Inc. Method and apparatus for positioning at least one engraving head
JPH0966595A (ja) * 1995-08-30 1997-03-11 Kaneda Kikai Seisakusho:Kk 新聞印刷用刷版の製作方法
EP0986465B1 (fr) * 1997-06-02 2001-11-07 Heidelberger Druckmaschinen Aktiengesellschaft Procede de gravure de cylindres d'impression
DE19734411A1 (de) * 1997-08-08 1999-02-11 Heidelberger Druckmasch Ag Verfahren zum Positionieren von Gravierorganen

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9951436A1 *

Also Published As

Publication number Publication date
WO1999051436A1 (fr) 1999-10-14
DE19814939A1 (de) 1999-10-07
JP2002510570A (ja) 2002-04-09
US6540453B1 (en) 2003-04-01

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