EP2090435A1 - Entraînement rotatif et axial, en particulier pour un cylindre distributeur d'encre - Google Patents

Entraînement rotatif et axial, en particulier pour un cylindre distributeur d'encre Download PDF

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Publication number
EP2090435A1
EP2090435A1 EP08101585A EP08101585A EP2090435A1 EP 2090435 A1 EP2090435 A1 EP 2090435A1 EP 08101585 A EP08101585 A EP 08101585A EP 08101585 A EP08101585 A EP 08101585A EP 2090435 A1 EP2090435 A1 EP 2090435A1
Authority
EP
European Patent Office
Prior art keywords
rotary body
threaded
longitudinal axis
drive
threaded element
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Withdrawn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
EP08101585A
Other languages
German (de)
English (en)
Inventor
Thomas Seiler
Fröhlich Martin
Burri Daniel
Zehnder Thomas
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.)
Wifag Maschinenfabrik AG
Original Assignee
Wifag Maschinenfabrik 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 Wifag Maschinenfabrik AG filed Critical Wifag Maschinenfabrik AG
Priority to EP08101585A priority Critical patent/EP2090435A1/fr
Publication of EP2090435A1 publication Critical patent/EP2090435A1/fr
Withdrawn legal-status Critical Current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
    • B41F31/00—Inking arrangements or devices
    • B41F31/15—Devices for moving vibrator-rollers

Definitions

  • the invention relates to a device and a method, in particular in or for a printing press, such.
  • Example an offset or rotary printing machine, wherein a rotationally driven rotary body rotationally moved along its longitudinal axis and / or is rotationally driven about its longitudinal axis.
  • the ink film transported for printing the material web is split in terms of its thickness with a plurality of rollers.
  • a forme cylinder which has the printing form
  • the thin ink film is removed from an inking roller with the places whose shapes are to be printed on the material to be printed in the course.
  • This uneven ink film thickness can reduce the print quality.
  • so-called Farbreibwalzen be used, which serve in addition to the Farbfilmierspaltung for a trituration of the ink film in the longitudinal direction of the ink roller. This eliminates uneven color film thicknesses, increasing print quality.
  • the longitudinal movement of the Farbreibwalzen is also referred to as traversing.
  • a drive device for a linear and rotary motion comprises a rotary drive and a linear drive, such.
  • a linear drive such.
  • B. a linear motor which triggers a linear movement.
  • the linear movement is achieved by an energy storage element, such. As a spring or a magnetic spring, intercepted and vice versa. This creates an oscillating axial movement.
  • the DE 101 57 243 shows an apparatus for a rotary printing press, comprising a wart-like rotary body and a threaded member, wherein the rotary body of the threaded member along its longitudinal axis is displaceable.
  • An object of the invention is to provide a device and a method with which a traversing movement and / or a rotational movement of a rotational body is adjustable flexibly and inexpensively.
  • the device according to the invention can generally be used in machines in which a rotational body is to be displaced along its longitudinal axis. This is the case in particular in machines in which a rotational body with respect to its axial position relative to a transportable, z. B. web-shaped material to be moved.
  • the device according to the invention can be used in machines in which a fluid is conveyed via a roller system, wherein at least one roller of the roller system, for example for better fluid distribution in Longitudinal, is moved axially.
  • Such a movement can z. B. be a single axial movement or periodically to achieve a so-called traversing the roller.
  • the device according to the invention is characterized in that the roller-shaped rotational body can be driven by the threaded element along its longitudinal axis and / or can be driven rotatably about the longitudinal axis of the rotational body.
  • the threaded element is used exclusively for the axial displacement of the rotating body.
  • the rotary drive is ensured by a separate drive.
  • the roller-shaped rotary body is a roller, in particular a color or dampening roller of a color and / or dampening unit, or a cylinder, in particular a plate cylinder, a blanket cylinder or a transfer cylinder of a printing unit.
  • the device in a printing press Rotalionsdruclunaschine in particular, such. B. in the field of offset printing.
  • ink is transferred from a paint container, such as a paint container.
  • B. an ink fountain applied to a roller and from there via a roller system comprising a plurality of rollers, transferred to a plate or forme cylinder.
  • the ink film thickness is reduced in each case, in particular halved by color splitting. Since color is assumed only at ink-receiving points of the plate or plate cylinder, the color is transferred to the ink-receiving points later on a web to be printed, especially cloth or paper web, usually by interposing a blanket or transfer cylinder, arise on the Cylinder system upstream mold or plate cylinder different ink film thicknesses, which can lead to a reduction in print quality, in particular for stenciling or ghosting. To avoid this, at least one of the inking rollers can be designed according to the device according to the invention.
  • a fountain solution layer is applied to the plate or plate cylinder before application of ink by means of a dampening unit, in particular only to ink-repellent surfaces
  • dampening solution is transferred from the transfer cylinder of the dampening unit to the plate or plate cylinder.
  • different damping agent thicknesses can also occur in the cylinder system of the dampening unit, which can lead to a reduction in print quality.
  • the device according to the invention can also be used for at least one of the cylinders of the dampening unit.
  • the threaded element may preferably be part of a screw drive, namely an inner part, in the following threaded spindle, or an outer part surrounding the inner part, in the following threaded nut.
  • a threaded nut and a cooperating threaded spindle are provided, which in particular form the screw drive.
  • the nut may have an internal thread and the threaded spindle an external thread.
  • one of a threaded spindle and a threaded nut may have a thread groove and the other of a threaded spindle and a threaded nut may have a cam which protrudes into the thread groove.
  • An element of the screw drive namely one of threaded nut and threaded spindle, may be rotatably connected to the rotary body, wherein preferably this element is referred to as a threaded counter-element and the other element of the screw as a threaded element.
  • the threaded member may be rotatable relative to the rotary body.
  • the elements of the screw drive on a motion thread are formed as a trapezoidal thread and more preferably as a ball screw.
  • the use of a ball screw has, in contrast to another thread, such.
  • trapezoidal the advantage that the so-called stick-slip effect, ie the transition from static to sliding friction prevents, and the axial play of the threaded elements to each other, which can lead to undesirable effects especially in a reversal of rotation of the elements of the screw become.
  • the nut can be formed in two parts, wherein the parts are braced against each other in the axial direction.
  • the ball screw transmission of forces between the elements of the screw by means of at least one, preferably a plurality of balls, which engage in both a groove of the one and in a groove of the other element of the screw drive.
  • the balls are arranged between the grooves of the nut and the spindle as Kraflübertragungsstoff. It is generally preferred that the pitch of the thread or the thread groove of the screw drive is so great that no self-locking in the rotational and / or axial direction can take place.
  • the longitudinal movement of the rotary body with a thread it is possible to adjust the adjustment path, the speed and / or the acceleration of the rotary body, and in an oscillating rotary body, the frequency and / or the amplitude flexible.
  • the shape of the oscillation can be adjusted flexibly in contrast to the prior art and is therefore not limited to a sinusoidal form, but can take a variety of other forms.
  • a corresponding control of the drive for the threaded element such. B. by means of a control or regulating device, a flexible conversion of said parameters in almost any operating state is possible.
  • a conversion of the device or a temporary reduction in operating speed or a complete shutdown of the system is not necessary in the conversion-
  • the adjustment of the axial position of the rotary body during the full operating speed, at reduced operating speed and / or standstill of the rotating body is particularly preferred.
  • the rotational speed of the rotational body of the device according to the invention compared to the rotational speeds of the rotational body, with which it interacts directly is adapted so that no or only a negligible slip occurs between the bodies of rotation.
  • the longitudinal axis of the threaded element or the screw drive is aligned with the longitudinal axis about which the rotating body rotates.
  • the longitudinal axis of the threaded element and the longitudinal axis of the rotational body should be parallel.
  • a drive element in particular a motor or an output member of a transmission for a rotary drive for the threaded element
  • Preferred is a Electric motor, in particular angle or speed controlled, or a hydraulic or pneumatic motor.
  • the drive can take place via an output member of a transmission.
  • the drive member of the transmission may for example be connected to a drive motor or a main drive train of the machine.
  • the ratio of the input to the output speed can be changed via the transmission, so that z. B. the longitudinal movement of the rotating body on the change of the speed ratio in the transmission is generated.
  • the threaded element may be connected to the rotor of the motor or at least rotationally and axially fixed to the rotor of the motor.
  • the threaded element may be the output member of the transmission or rotationally and axially fixed to the output member of the transmission.
  • the engine or the transmission are preferably rotatably and axially fixed to the machine frame.
  • the threaded counter element is rotatably and axially connected to the rotary body.
  • the associated threaded element can be rotatable and axially movable relative to the threaded counter-element.
  • the threaded element relative to a machine frame, on which the rotational body radially, in particular with a radial bearing, supported be rotatably movable and axially fixed.
  • a rotational movement of the threaded element relative to the rotary body can cause an axial movement of the rotary body relative to the threaded element.
  • the device according to the invention particularly preferably has a further threaded element.
  • the threaded element described above is described below as the first threaded element and the further threaded element as the second threaded element.
  • the first threaded element and the second threaded element can act on the rotary body from a common end face of the rotary body.
  • the threaded elements may be connected to the rotary body at a common end face of the rotary body or into the rotary body extend.
  • one threaded member may extend through the other threaded member, preferably with the longitudinal axes of the threaded members in alignment.
  • one of the threaded elements can be hollow or tubular, so that the other threaded element can extend therethrough.
  • An engine can, for. B. drive via a transfer case both threaded elements.
  • the transmission is a differential gear, which can increase a rotational speed of a threaded member by an amount and can reduce the rotational speed of the other gear member by the same amount.
  • the rotational speeds of the first and the second threaded element provide an arithmetic mean, which preferably corresponds to the rotational speed of the rotary body.
  • each end face of the rotary body has a threaded element with a corresponding drive on the rotary body.
  • the drives, in particular with the corresponding threaded elements can be arranged on the same side of the rotary body or the machine frame, i. that they act on the rotation body from the same side.
  • the threaded elements are rotationally driven in such a way that with respect to a rotational speed of the rotational body, the arithmetic mean of the rotational speeds of the individual drives corresponds to the rotational speed of the rotational body.
  • the drives for the threaded elements can be driven or operated so that the one threaded element has the same speed as the other threaded element, whereby the rotational speed of each threaded element corresponds to the rotational speed of the roller body. In this case, no axial movement of the rotating body takes place.
  • a threaded element with respect to the rotational speed of the rotary body increased by a certain amount speed and the other threaded member having a reduced by this amount speed, thereby resulting in an axial displacement of the rotating body in one direction at a constant speed of Rofiationslcörpers.
  • An axial movement of the rotating body in the opposite direction is achieved when the rotational speeds of the threaded elements are reversed.
  • the threaded elements particularly preferably have threads or thread grooves with a different direction of rotation the first threaded element has a right-hand thread or a right-handed thread groove, and the second threaded element has a left-hand thread or a right-handed thread groove, or the first threaded element has a left-hand thread or a right-handed thread groove and the second threaded element has a right-hand thread or a right-handed thread groove.
  • the first and second threaded members have the same amount of pitch, ie, eg, the axial travel per revolution.
  • the one or more drives for the or the threaded elements or the rotatably connected to the rotary body drive can be mounted outside of the rotating body, which has the advantage that the heat generation of the drives, the rotational body not or only slightly affected.
  • the drives can each be arranged between the machine frame and the rotary body.
  • the drives can be arranged so that the machine frame is located between the rotary body and a drive.
  • the machine frame and the rotary body may be located between the drives.
  • the drive or drives can be arranged on or within the rotation body.
  • the one or more drives can be located between the elements of the machine frame, in which the rotational body is supported radially on each of its end faces.
  • the drive elements can, for example by means of sliding contacts or, if the drive elements are rotatably connected to the machine frame, z. B. are connected via simple cable connections, since in preferred embodiments, at least the stators of the drives can not perform rotational movement relative to the machine frame.
  • the rotational speeds of the threaded elements oscillate in opposite directions, ie. H. phase-shifted by 180 °, the drive or drives being controlled accordingly.
  • the invention further relates to a method, in particular for use in a printing press, in which a roller-shaped rotary body is driven to rotate about its longitudinal axis and / or is displaced along its longitudinal axis.
  • the method is preferably carried out with the device described herein.
  • FIG. 1 shows a trained as a roller body of revolution 1, from whose front sides shafts 5 extend, which are supported radially on the machine frame 4a, 4b.
  • the rotation body 1 is due to its length in FIG. 1 not fully represented and therefore shown shortened by a breaking edge.
  • the rotary body 1 is axially movable relative to the machine frame 4a, 4b and rotatably mounted.
  • the shafts 5 bearing surfaces 12a, 12b, which cooperate with a designed as a rolling bearing radial bearings.
  • the bearing surfaces 12a, 12b have a length extending in the longitudinal direction L, which is dimensioned such that the bearing surfaces 12a, 12b respectively interact with the associated radial bearing 6a, 6b when the rotational body 1 is intended to be axially displaced along the longitudinal axis L.
  • the radial bearings 6a, 6b are each received in a bushing 7a, 7b, which in turn is supported on the machine frame 4a, 4b.
  • the radial bearings 6a, 6b are in a cylindrical bore, which of the Bushings 7a, 7b is formed, received and secured with a spacer ring 10a, 10b and an axial securing ring 11a, 11b against falling out.
  • the shafts 5 have at their ends by means of bushes formed axial stops 9a, 9b, which are formed by a radially projecting collar of a sleeve on.
  • the distance x between the axial stop 9a, 9b and the corresponding stop of the bush 7a, 7b forms the maximum amplitude that the rotating body 1 can perform as intended.
  • a drive 3a, 3b designed as an electric motor is arranged, which is connected to the machine frame 4a, 4b in a rotationally and axially fixed manner.
  • the shafts 5 have tapped holes (in FIG. 1 not visible), in each of which a threaded element 2a, 2b extends.
  • the threaded elements 2a, 2b each have a movement thread.
  • the threaded element 2a is, as shown here by way of example, a left-hand thread and the threaded element 2b a right-hand thread.
  • the threaded elements 2a, 2b extend through the drive 3a, 3b.
  • the threaded elements 2a, 2b form the rotor of the drive or are rotatably and axially fixedly connected to the rotor of the drive.
  • the threaded spindles can serve as threaded counter-elements by being rotationally and axially fixedly connected to the rotary body or its shafts.
  • the threaded element is formed in this alternative by the rotor of the drive 3a, 3b.
  • FIG. 1 The function of the device according to the invention FIG. 1 will come out later together with the function of the device FIG. 2 described because the functions are substantially similar.
  • FIG. 2 shows a further embodiment of a device according to the invention.
  • the rotary body 1 is supported radially on the bushes 7a, 7b, which are rotatably and axially fixed to the machine frame 4a, 4b.
  • the rotary body 1 is rotatable relative to the bushes 7a, 7b and axially displaceable.
  • Radial bearing 6a On the rotation body 1 are Radial bearing 6a, which are axially secured with Axialommesringen 11a, 11b relative to the rotational body.
  • the radial bearings 6a, 6b are supported on bearing surfaces 12a, 12b which are dimensioned in their axial length so that the radial bearings 6a, 6b are still supported on the bearing surfaces 12a, 12b when the rotational body 1 is intended axially offset along its longitudinal axis has been.
  • Rotationally and axially fixed to the bushings 7a, 7b are each formed as motors drives 3a, 3b connected.
  • the stator of the drives is rotationally and axially fixed to the bushes 7a, 7b and with the machine frame 4a, 4b.
  • Rotationally and axially fixed to the rotary body 1 are designed as threaded bush threaded counter-elements 8a, 8b, in which threaded elements 2a, 2b are screwed.
  • the threaded elements 2a, 2b extend through the drive 3a, 3b and form the rotor or are rotatably and axially fixedly connected to the rotor.
  • the first threaded element 2a has a left-hand thread and the second threaded element 2b has a right-hand thread, as a result of which the threaded elements 2a, 2b have threads with different directions of rotation.
  • the threaded spindles can serve as threaded counter-elements by being axially and rotationally fixedly connected to the rotary body 1 via the bushes 8a, 8b.
  • the rotors of the drives 3a, 3b which are rotatable and axially fixed relative to the machine frame, then serve as threaded elements.
  • the rotary body 1 Due to the different direction of rotation of the threads of the threaded elements 2a, 2b, when the drives 3a, 3b are operated in the same direction of rotation, the rotary body 1 is rotated. At the same rotational speeds of the drives 3a, .3b, the rotary body 1 retains its axial position and is not moved axially. If the drives 3a, 3b are operated at different speeds, an axial movement of the rotary body 1 takes place. If the rotational speeds of the drives 3a, 3b are reversed, ie that the drive 3a, 3b, which initially ran slower, is now operated faster and vice versa, then the direction of the axial movement of the rotary body 1 also changes.
  • a drive such as. B. drive 3a
  • the rotational speed of the drive 3b varies, in particular be increased and decreased periodically.
  • the rotary body 1 performs a periodic traversing movement in the longitudinal direction.
  • the rotational speed of the rotary body 1 also changes periodically since it is equal to the arithmetic mean of the rotational speeds of the threaded members 2a and 2b.

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EP08101585A 2008-02-13 2008-02-13 Entraînement rotatif et axial, en particulier pour un cylindre distributeur d'encre Withdrawn EP2090435A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP08101585A EP2090435A1 (fr) 2008-02-13 2008-02-13 Entraînement rotatif et axial, en particulier pour un cylindre distributeur d'encre

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP08101585A EP2090435A1 (fr) 2008-02-13 2008-02-13 Entraînement rotatif et axial, en particulier pour un cylindre distributeur d'encre

Publications (1)

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EP2090435A1 true EP2090435A1 (fr) 2009-08-19

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EP08101585A Withdrawn EP2090435A1 (fr) 2008-02-13 2008-02-13 Entraînement rotatif et axial, en particulier pour un cylindre distributeur d'encre

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109532210A (zh) * 2018-12-19 2019-03-29 中山松德印刷机械有限公司 一种印刷机横向套色机组
CN113601970A (zh) * 2021-08-19 2021-11-05 浙江云岭数码科技股份有限公司 一种印刷机及其印刷方法

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4672894A (en) * 1986-03-03 1987-06-16 Hardin Philip J High rotational speed autoreversing axially oscillating ink roller
DE19606849A1 (de) * 1995-02-27 1996-08-29 Mitsubishi Heavy Ind Ltd Registereinstellvorrichtung für eine Druckmaschine
NL1019280C2 (nl) * 2001-11-02 2003-05-07 Skf Ab Oscillerende aandrijfeenheid.
DE10157243A1 (de) 2001-11-22 2003-06-05 Roland Man Druckmasch Reibzylinder einer Rotationsdruckmaschine
EP1361055A2 (fr) 2002-05-07 2003-11-12 MAN Roland Druckmaschinen AG Entraínement pour un rouleau baladeur
DE10324601A1 (de) 2003-05-30 2004-12-16 Siemens Ag Antriebsvorrichtung für Linear- und Rotationsbewegung
DE102006061051A1 (de) * 2006-12-22 2008-06-26 Maschinenfabrik Wifag Dreh-Changier-Antrieb, insbesondere für eine Farbreiberwalze

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4672894A (en) * 1986-03-03 1987-06-16 Hardin Philip J High rotational speed autoreversing axially oscillating ink roller
DE19606849A1 (de) * 1995-02-27 1996-08-29 Mitsubishi Heavy Ind Ltd Registereinstellvorrichtung für eine Druckmaschine
NL1019280C2 (nl) * 2001-11-02 2003-05-07 Skf Ab Oscillerende aandrijfeenheid.
DE10157243A1 (de) 2001-11-22 2003-06-05 Roland Man Druckmasch Reibzylinder einer Rotationsdruckmaschine
EP1361055A2 (fr) 2002-05-07 2003-11-12 MAN Roland Druckmaschinen AG Entraínement pour un rouleau baladeur
DE10324601A1 (de) 2003-05-30 2004-12-16 Siemens Ag Antriebsvorrichtung für Linear- und Rotationsbewegung
DE102006061051A1 (de) * 2006-12-22 2008-06-26 Maschinenfabrik Wifag Dreh-Changier-Antrieb, insbesondere für eine Farbreiberwalze

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109532210A (zh) * 2018-12-19 2019-03-29 中山松德印刷机械有限公司 一种印刷机横向套色机组
CN113601970A (zh) * 2021-08-19 2021-11-05 浙江云岭数码科技股份有限公司 一种印刷机及其印刷方法
CN113601970B (zh) * 2021-08-19 2022-11-11 浙江云岭数码科技股份有限公司 一种印刷机及其印刷方法

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