EP0875377A1 - Apparatus for detecting mutual positions and controlling travelling of a plurality of working components sequentially mobile along parallel straightline paths - Google Patents

Apparatus for detecting mutual positions and controlling travelling of a plurality of working components sequentially mobile along parallel straightline paths Download PDF

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Publication number
EP0875377A1
EP0875377A1 EP98106061A EP98106061A EP0875377A1 EP 0875377 A1 EP0875377 A1 EP 0875377A1 EP 98106061 A EP98106061 A EP 98106061A EP 98106061 A EP98106061 A EP 98106061A EP 0875377 A1 EP0875377 A1 EP 0875377A1
Authority
EP
European Patent Office
Prior art keywords
transducer
working
control unit
components
working components
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Withdrawn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
EP98106061A
Other languages
German (de)
English (en)
French (fr)
Inventor
Flavio Buffo
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.)
Rotomec SpA
Original Assignee
Valmet Rotomec SpA
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 Valmet Rotomec SpA filed Critical Valmet Rotomec SpA
Publication of EP0875377A1 publication Critical patent/EP0875377A1/en
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F13/00—Common details of rotary presses or machines
    • B41F13/08—Cylinders
    • B41F13/24—Cylinder-tripping devices; Cylinder-impression adjustments
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F31/00—Inking arrangements or devices
    • B41F31/30—Arrangements for tripping, lifting, adjusting, or removing inking rollers; Supports, bearings, or forks therefor
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G1/00—Calenders; Smoothing apparatus
    • D21G1/002—Opening or closing mechanisms; Regulating the pressure
    • D21G1/004—Regulating the pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2271/00—Mill stand parameters
    • B21B2271/02—Roll gap, screw-down position, draft position

Definitions

  • the present invention relates to an apparatus for detecting mutual positions and controlling travelling of a plurality of working components sequentially mobile along parallel straight-line paths.
  • a typical, although not exclusive, application of the present invention is the driving motion of the cylinders in a printing or rolling group that conventionally requires the use of complex and expensive mechanical transmission systems which are subject to inevitable plays and inaccuracies.
  • the main object of the present invention is to provide an apparatus for detecting mutual positions and controlling travelling of three or more working components sequentially mobile along parallel straight-line paths, whereby making it possible either to move all the mobile working components in unison or to displace only one or some of them independently of the others.
  • Another object of the present invention is to provide a detecting and controlling apparatus arranged to cause a plurality of mobile elements to effect motions of translation with high accuracy, e. g. of the order of 2 microns, by using either one motion source or a motor for each mobile element.
  • a further object of the present invention is to provide a detecting and controlling apparatus which is highly reliable and has low operating costs.
  • an apparatus for detecting mutual positions and controlling travelling of a plurality of working components sequentially mobile along parallel straight-line paths characterized in that it comprises an electronic control unit, a differential drive means for the working components and a transducer arranged to detect the position of each working component and to generate output signals indicating the position of each working component for the control unit, whereby the control unit will generate control output signals for the drive means for the relative differential movement of the working components.
  • the linear transducer comprises an absolute transducer comprising a magnetostrictive bar detecting device with an electronic interface.
  • the detecting and controlling apparatus is applied to a printing group 1 of a flexographic machine or of a rolling plant for spreading adhesives, paints or lakes.
  • the apparatus comprises three or more cylinders, and in the case of a flexographic, are referred to as back-holding roller 2, screen cylinder 3 and drawing cylinder 4.
  • back-holding roller 2 screen cylinder 3
  • drawing cylinder 4 drawing cylinder 4.
  • back-holding roller 2 screen cylinder 3
  • drawing cylinder 4 drawing cylinder 4
  • the same cylinders are differently termed in the art.
  • Cylinders 2 to 4 are rotatably mounted at their end holds 2a, 3a and 4a, respectively, on a respective pair of lateral shoulders 5 which are in turn slidably supported, i.e. they can translate on straight-line guides 6 carried by a pair of cantilevered brackets 7, whereby the lateral shoulders act as slides.
  • Each lateral shoulder 5 has also a downward extension 8, which is offset with respect to its respective bracket 7 and locates a lead nut (not shown in the drawings and of the type disclosed in our patent application VR97A000021, filed on March 11, 1997 and relating to a control device for controlling movements of a plurality of sequential elements movable along parallel straight-line paths) in a screwing engagement with a ball-cycling screw 9 which is laterally supported on each bracket 7, e. g. the ball-cycling screw 9 can be supported at its ends on ball bearings 10 and 11 seated into lugs 12 and 13, respectively, of each bracket 7.
  • One end of the ball-cycling screw 9 has a tang 14 on which a toothed pulley 15 is fitted.
  • a toothed transmission belt 16 is wound around both pulley 5 and a driving pulley 17 which is fitted on the output shaft 18 of a geared motor group (comprising a step motor and epicyclical reduction gear) 19 controlled by an electronic control unit or card 20.
  • a bar sensor 21 Parallel to and co-extensive with the ball-cycling screw 9 (e.g. slightly above the same) there is a bar sensor 21 which extends along one side of each bracket 7.
  • An example for a bar sensor may be an absolute magnetostrictive linear movements transducer of any suitable type, such as a Tempsonic sensor manufactured by MTS Systems Corporation - North Carolina - USA, which is an absolute sensing device arranged to detect the relative position of each slide 5, and thus of the cylinder carried by it and to feed input signals to the control unit 20.
  • the geared motor group 19, the control unit 20 and the transmission of the motion from the geared motor group 19 and the ball-cycling screw 9 are located in an explosion-proof box 22, as required by the law in many countries.
  • sensor 21 feeds input signals representative of the position of each cylinder 2 to 4 to the control unit 20.
  • the control unit can keep in operation all the lead nuts within the lugs 8, and thus by sending a control signal to the step motor of the geared motor group 19 the cylinders 2 to 4 all move in unison.
  • control unit 20 can disengage all the lead nuts and keep in operation only the lead nut of the first cylinder, and thus upon energising the geared motor group 19 only the first cylinder will be moved, or the last two cylinders and so on, and this can be obtained with an accuracy of about 2 microns, which is amply sufficient for any printing or rolling operation.
  • a splined shaft 23 Parallel to the ball cycling screws 9 on the brackets 7 there is also supported a splined shaft 23, e. g. a three-lobed ball shaft, which is operatively connected to a gear reduction unit 24 for each cylinder 2 to 4 for transmitting rotational motion to its respective cylinder.
  • Shaft 23 is head driven by an electric motor 25 of suitable power, and thus the speed of the cylinders 2 to 4 depends upon that of the motor 25 which, however, remains stationary in position and does not move with the cylinders. Since the splined shaft 23 allows the cylinders 2 to 4 both to rotate and translate, it is possible to move the cylinders relative one another even when the same are rotating.
  • each cylinder 2 to 4 have each a respective electric motor 26, 27 and 28 for causing them to rotate around their axis, each motor having a respective transmission group indicated at 29, 30 and 31, respectively.
  • a magnetostrictive bar sensor may be replaced by an absolute incremental optical line sensor or encoder.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Transmission Devices (AREA)
  • Control Of Position Or Direction (AREA)
EP98106061A 1997-04-02 1998-04-02 Apparatus for detecting mutual positions and controlling travelling of a plurality of working components sequentially mobile along parallel straightline paths Withdrawn EP0875377A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITVR970028 1997-04-02
IT1997VR000028A IT1305903B1 (it) 1997-04-02 1997-04-02 Dispositivo di rilevamento della posizione reciproca e di comandotraslazione di piu' elementi sequenziali mobili lungo percorsi

Publications (1)

Publication Number Publication Date
EP0875377A1 true EP0875377A1 (en) 1998-11-04

Family

ID=11428326

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98106061A Withdrawn EP0875377A1 (en) 1997-04-02 1998-04-02 Apparatus for detecting mutual positions and controlling travelling of a plurality of working components sequentially mobile along parallel straightline paths

Country Status (2)

Country Link
EP (1) EP0875377A1 (enrdf_load_stackoverflow)
IT (1) IT1305903B1 (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19937796B4 (de) * 1999-08-10 2007-03-22 Man Roland Druckmaschinen Ag Druckwerk
WO2011015484A3 (de) * 2009-08-04 2011-03-31 Kba-Metronic Aktiengesellschaft Positioniervorrichtung und ein verfahren zur positionierung zumindest zweier zylinder

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2224592A1 (enrdf_load_stackoverflow) * 1973-04-04 1974-10-31 Kleinewefers Ind Co Gmbh
EP0096646A1 (fr) * 1982-06-04 1983-12-21 HOLWEG S.A., Société Anonyme dite: Procédé et dispositif pour le prépositionnement des stations d'encrage d'une imprimeuse
EP0351672A1 (de) * 1988-07-22 1990-01-24 Schärer Schweiter Mettler AG Vorrichtung zur Regelung des Anpressdruckes einer Spule an einer Anlagewalze
EP0557198A1 (fr) * 1992-02-21 1993-08-25 Komori-Chambon Sa Procédé et dispositif de détection, dans une machine, de la position de venue en contact de deux pièces dont l'une au moins est mobile

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2224592A1 (enrdf_load_stackoverflow) * 1973-04-04 1974-10-31 Kleinewefers Ind Co Gmbh
EP0096646A1 (fr) * 1982-06-04 1983-12-21 HOLWEG S.A., Société Anonyme dite: Procédé et dispositif pour le prépositionnement des stations d'encrage d'une imprimeuse
EP0351672A1 (de) * 1988-07-22 1990-01-24 Schärer Schweiter Mettler AG Vorrichtung zur Regelung des Anpressdruckes einer Spule an einer Anlagewalze
EP0557198A1 (fr) * 1992-02-21 1993-08-25 Komori-Chambon Sa Procédé et dispositif de détection, dans une machine, de la position de venue en contact de deux pièces dont l'une au moins est mobile

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19937796B4 (de) * 1999-08-10 2007-03-22 Man Roland Druckmaschinen Ag Druckwerk
WO2011015484A3 (de) * 2009-08-04 2011-03-31 Kba-Metronic Aktiengesellschaft Positioniervorrichtung und ein verfahren zur positionierung zumindest zweier zylinder

Also Published As

Publication number Publication date
ITVR970028A0 (enrdf_load_stackoverflow) 1997-04-02
ITVR970028A1 (it) 1998-10-02
IT1305903B1 (it) 2001-05-21

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