• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a method for controlling the web tension in a dancer having web tension section, which is bounded by a driven by a single drive central winder and a nip, wherein an actual web tension (Fist) in the web tension section to a target web tension (FSoll) Controlling the dancers power (FSoll) of the dancer is controlled, characterized in that the actual web tension (Fist) is determined based on a drive torque (Mist) of the single drive and a current diameter or radius (rakt) of a web roll moved by the central winder.
    公开号:AT511029A2
    申请号:T18442011
    申请日:2011-12-19
    公开日:2012-08-15
    发明作者:
    申请人:Bosch Gmbh Robert；
    IPC主号:
    专利说明:

    SCS $ 3:. ·. ** .. * ·. i /.ro> ·· ** · * «·· (t |»
    Method for controlling the web tension in a web tensioning section having a dancer
    description
    The present invention relates to a method for controlling the web tension in a web tensioning section having a dancer according to the preamble of claim 1.
    Although the invention is described below essentially with reference to printing presses, it is not limited to such an application, but rather usable in all types of machine tools in which the web or material web passes through a so-called dancer, whose position is controlled. The web can be made of paper, cloth, cardboard, plastic, metal, rubber, in foil form, etc.
    State of the art
    The present invention relates to the field of web tension control in processing machines. In processing machines, such as printing machines, in addition to, for example, a longitudinal and / or page register often the web tension is regulated or adjusted in order to achieve an optimal processing result. A known possibility for web tension specification, in particular for a winder (winding or unwinding device), uses a dancer, in which a movable dancer roll impresses the web tension. A dancer has the advantageous property of being able to absorb discontinuities in the web run within relatively large limits, without there being any significant change in the web tension.
    The position of the dancer roller, the so-called dancer position, is kept at a setpoint value by the dancer position control by specifying the winder speed. As long as the dancer is within its movable mechanical limits, the web tension is essentially due to the force impression, for example. a pneumatics or hydraulics maintained. In this case, the dancer grip is either adjusted or regulated with the aid of a measured actual web tension. The measurement of the web tension in the web tension section with the dancer is effected by means of a suitable detection device, such as e.g. a load cell.
    The web tension control by a dancer requires a relatively large design effort, since both the dancer itself and the detection device are provided! 0 must. It is therefore desirable to simplify web tension control by a dancer.
    DISCLOSURE OF THE INVENTION According to the invention, a method for web tension control by a dancer according to FIG
    Proposed claim 1. Advantageous embodiments are the subject of the dependent claims and the following description.
    Advantages of the invention 20
    Due to the structure, the web tension impression by the dancer is relatively sluggish and inaccurate. The effort for a measurement of the actual web tension can be saved and a simpler determination of the FST web tension can be achieved if the actual web tension for the dancer having web tension section (dancer section) not directly measured 25, but only from other, usually known anyway or at least easier measurable quantities is calculated. The web tension results from the tensile force applied by the central winder, which in turn results in a particularly simple manner (lever law) from the instantaneous drive torque and the instantaneous diameter or radius of the wound web roll. The drive torque is usually known in the machine controller 30 because it results from the drive current. The Rollendurchntesscr can, for example, be measured in a simple manner or is determined from the number of revolutions of the winder performed. For example, a measurement can be used as the basis for calculation. By saving the detection device manufacturing costs and maintenance costs are reduced because the detection device can be saved in Tänzerabschnitl. Furthermore, the invention opens up the possibility of providing such in existing systems in which so far no Bahnspamnmgsregelung by the 'dancer took place. This can be improved in existing systems of the web feed or web extract. Under a regulation of the web tension is 5 in particular also the indirect control over a gleichwirkendc size, in particular the dancer force understood. In the present case, the Tan / erabsehnitt is limited by a central winder and a nip, which clamps the web form or kraftsehlüssig and therefore can memorize a 10 lane tension in the web. In a printing press, a nip, for example, from a printing unit, in which a frictional unit between the driven pressure cylinder, the impression roller and the material web is made, or of course by a train (eg. Infeed, Outfeed) is formed. 15 If additionally a frictional torque of the central winder is considered, the
    Determination accuracy can be further increased. The calculation then uses the torque corrected by the friction torque. The consideration of the friction torque can be done in different preferred embodiments. In this case, the friction torque can be modeled as constant friction, speed-dependent friction (speed-proportional or by means of a predefinable, speed-dependent characteristic) and / or as winding mass-dependent friction (proportional to the winding mass, which in turn depends on the diameter).
    An arithmetic unit according to the invention, e.g. a control unit of a printing press, is 25, in particular programmatically, configured to perform a method according to the invention.
    The implementation of the invention in the form of software is also advantageous, since this allows very low costs, in particular if an executing arithmetic unit is still used for further tasks and therefore exists anyway. Suitable data carriers for providing the computer program are, in particular, floppy disks, hard disks, flash memories, EEPROMs, CD-ROMs, DVDs and the like. It is also possible to download a program via computer networks (Internet, intranet, etc.). '.4 / .ΙΌ - • «· • · * ·» »· t • · *« ····
    Further advantages and embodiments of the invention will become apparent from the description and the accompanying drawings.
    It is understood that the features mentioned above and those yet to be explained below can be used not only in the particular combination indicated, but also in other combinations or in isolation, without departing from the scope of the present invention.
    The invention is illustrated schematically by means of exemplary embodiments in the drawing and will be described in detail below with reference to the drawing.
    Good spelling
    FIG. 1 shows a section of a processing machine with an unwinder, a dancer and an infeed unit, wherein the web tension is regulated according to an embodiment of the invention.
    Figure 2 shows schematically a web tension control according to a first
    From leadership s form of the invention,
    Figure 3 shows schematically a web tension control according to a second
    Embodiment of the invention.
    Without limitation, a web tension control for a unwinding process will be described below. It will be understood, however, that the invention is equally applicable to a winding operation.
    FIG. 1 schematically shows a detail of a balm-processing machine 100, wherein a goods balm 101 is unwound from an unwinder 102 designed as a central winder and is fed to a drawing-in unit 103 via a dancer 110. On the unwinder 102, a web roll 104 is wound with a diameter D, which continuously reduces during unwinding. The unwinder drive, typically a servo motor, applies a drive torque M, which, for example, may be determined based on the motor current.
    The dancer 110 comprises two stationary deflection rollers 11 l and a movable dancer roller 5 j 12, which impresses a force Fund with a web tension in the web. The decomposition solution x is detected and transmitted to a control unit (arithmetic unit) 150, which is set up in particular for controlling the dancer position. Task of the dancer position control is to keep the position of the dancer roller 112 at a desired position. For this purpose, the speed n of the unwinder 102 can be influenced by the control device 150. The 10 dancer position control is independent of the invention.
    Between the unwinder 102 and the retraction unit 103, a web tension section Al is formed with a web tension S1 (also referred to as a dancer section) whose web tension S1 is set by specifying the dancer force F by a control device 15 (arithmetic unit) 160.
    According to the illustrated embodiment of the invention, the control device 160 is adapted to the relevant for the web tension control of the dancer section Al actual value S1 of the web tension from the drive torque M for the central winder 102 20 (preferably taking into account a friction torque) and the current diameter D (or the radius D / 2).
    It should be noted that the control devices 150 and 160 can be implemented in one or more arithmetic units. 25
    With reference to Figures 2 and 3, preferred embodiments of the invention will now be described in more detail. In the figures 2 and 3 control schemes for carrying out the invention are shown, as they may be based on a control means 160. The same elements are provided with the same reference numerals and are explained only once. FIG. 2 shows a first, simple control scheme which, in the case of a processing machine 100 according to FIG. 1, serves to regulate the dancer force Fis> (and thus indirectly the web tension) to a desired value Psun. According to the invention, however, not a measured value is used as the feedback variable for the control, but the actual value of the dancer force e / .ro- t · · IM »
    Fist is determined in the context of the invention from the actual value of the drive torque Mjs, and the current diameter or, radius r ^, the web roll 104. In the embodiment illustrated here, the drive torque is multiplied by the reciprocal radius and fed to a comparison with the reference variable or setpoint FS (|.) If a friction torque MR ≦. B is taken into account, the actual value of the dancer force is F = ( Mis, ~ -VI Kc: h) 'rHk,
    The control difference determined therefrom is fed to a control element 200, which can be designed, for example, as a PI element. The force control loop is subordinated in the present example, a pressure control loop, which is shown schematically by a control member 210. The control member 210 is used to control the pressure in a pneumatic or hydraulic dancer and is shown in the present example as a PT1 member.
    The force controller 200 outputs a setpoint PSo] | for the pressure supplied to the pressure regulator 210. This in turn outputs the actual pressure Pi5t acting on the dancer pneumatics 220. By changing the actual pressure, there is a change in the force Fjs1 exerted by the dancer 110 on the material web 101, which directly leads to a change in the web tension via the modulus of elasticity. FIG. 3 shows a further preferred control scheme, which differs from the embodiment according to FIG. 2 by the consideration of dead times and a smoothing of the drive torque. In the embodiment according to FIG. 3, the dead time T2, which results from the determination of the drive torque from the drive current and / or from the transmission of the measured value to the control device, is taken into account in a limb 310.
    According to the illustrated preferred embodiment of the invention, the measured or determined drive torque MiSl is further smoothed by, for example, determining a moving average and / or low pass filtering. This smoothing also results in a time shift, which is considered as T3 in a term 320. The track dead time TI, which describes a time delay between the activation of the dancer pneumatics and the change in the dancer force caused thereby, is taken into account in a further element 330.
    By taking into account the individual dead and delay times, the quality of the control can be improved. The dead and delay times are cingc in a preferred Austuhrungsform by the user in the control device.
    The control loop schemes modulated within the scope of the invention may be used to automatically, in particular also within the control unit 160, automatically control parameters (proportional gain, reset time, lead time, etc.), in particular according to known design criteria, e.g. Ziegler-Nichols or Chien,
    Hrones and Reswiek determine. In this way, the device of the system for the user can be made particularly simple because it does not need to have special control engineering knowledge.
    It can further be provided that the user merely has to set a parameter which, for example, is proportional to the automatically determined controller parameters, in order to produce a " controller sharpness " to pretend, i. thereby influencing the dynamic behavior of the control loop. The advantage of this is that this factor can be set comparably even with different winding systems, since the differences of the Wickelaniagen in the parameters used for the calculation (gains, time constants, ...) are already included or compensated by these.
    For example, the controller parameters can be set with higher dynamics in the startup process of the machine, as more emphasis is often placed on short settling time and not on good products. In constant running, when producing good products, the controller parameters are adjusted with noticeably less dynamics to obtain a more constant Balm strain (or Balm strain). In this way, it is also possible to optimize the control system for disturbance behavior, as is preferred for normal operation, or for guiding behavior, as is preferred, for example, for set-up operation.
    权利要求:
    Claims (12)
    [1]
    • »· ι» * · -. 8 / .1 * 0 - Claims [. Method for regulating the web tension in a web tension section (A1) having a dancer (110). the central winder (102) and a clamping point (103) driven by a silent drive of a Boring drive are delimited, wherein an actual web tension (S1; F, S |) in the web tension section (A1) is limited to a desired web tension (Fs "h). is controlled by controlling the dancer force (F ^ i) of the dancer (110), characterized in that the actual web tension (S1; Fist) is determined on the basis of a driving torque (Mist) of the single drive and a current diameter or radius (D; ) is determined by the central winder (102) moving web roll (104).
    [2]
    2. The method of claim 1, wherein the actual web tension (Sl; Flst) is controlled indirectly via the dancer force (FSon) of the dancer (110) and thereby an actual dancer force (Fisl) of the dancer (110) from the drive torque (Mist ) of the individual drive and the instantaneous diameter or radius (D; rakt) of the web roll (104) moved by the central winder (102).
    [3]
    3. The method of claim 1 or 2, wherein the one actual web tension (Sl; F ^,) or the actual dancer force (F ,,;) is additionally determined on the basis of a friction torque of the single drive.
    [4]
    4. The method of claim 3, wherein the friction torque includes a constant and / or speed-dependent portion.
    [5]
    5. The method of claim 4, wherein the speed-dependent component includes a proportion proportional to the speed and / or a characteristic-based component.
    [6]
    6. The method according to any one of claims 3 to 4, wherein the friction torque includes a winding mass-dependent share.
    [7]
    7. The method according to any one of the preceding claims, wherein at least one pressure regulator gain, at least one pneumatic mechanics characteristic parameters, at least one track dead time (TI), at least one Übertragungsstotzeit (T2) and / or at least one smoothing dead time (T3) are taken into account in the scheme.
    [8]
    8. arithmetic unit, which is adapted to perform a method according to one of the preceding 5 claims.
    [9]
    9, arithmetic unit according to claim 8, which is adapted to automatically perform a controller parameterization.
    [10]
    The arithmetic logic unit of claim 9, adapted to automatically adjust the controller parameters based on user inputs, e.g. a pressure regulator gain, a pneumatic mechanical characteristic parameters, a track deadtime (TI), a transmission dead time (T2) and / or a smoothing dead time (T3) to perform.
    [11]
    11. The computing unit according to claim 9 or 10, which is adapted to automatically perform the controller parameterization based on a dynamic factor to be entered, which influences the dynamic behavior of the control loop.
    [12]
    The arithmetic unit according to any one of claims 9 to 11, which is adapted to automatically perform the controller parameterization on the basis of a machine condition.

    9th De2, 201t
    类似技术:
    公开号 | 公开日 | 专利标题
    DE10335887B4|2007-11-08|Method and apparatus for controlling a cut register error and web tension of a web-fed rotary press
    EP2371748B1|2014-12-31|Method for determining at least one regulating parameter of a dancer controlling element
    EP2386511B1|2015-12-02|Tension control for a running web
    EP1795470B1|2010-02-10|Method for determining the web tension
    EP1505025B1|2013-07-24|Method and device for controlling the web tension forces and the cutting register of a rotary printer
    EP0976674A1|2000-02-02|Web tension control device
    DE102009016206A1|2010-10-14|Method for web tension adjustment
    DE10158985A1|2002-07-11|Stretch regulation assembly in intake of printing machines has material thickness measuring device, device to apply tension to material, and sensors to detect material spool thickness and angular position
    DE102009019624A1|2010-11-04|Method for determining at least one controller parameter of a control element in a web tension control loop for a processing machine
    AT511029A2|2012-08-15|METHOD FOR CONTROLLING THE WEIGHT VOLTAGE IN A TRAIN TENSION SECTION THAT HAS A DANCER
    EP2524806B1|2015-11-18|Method for regulating the web tension in a web processing machine
    DE1427888B2|1974-08-15|Device for reducing the thickness of strip material
    DE102012013435A1|2013-10-10|Method for pre-registering a processing station
    EP2067725B1|2018-01-03|Method of correcting the axis in a processing machine and processing machine
    EP2496417B1|2013-12-25|Method for controlling a control variable for a processing machine
    DE102007037564A1|2009-02-19|Axis correction method for a processing machine and a processing machine
    DE102010050821A1|2012-05-10|Method for regulating web tension in a web tension section for processing machine, involves determining actual-web tension in one web tension section, on basis of determined web tension of web tension section
    EP2065324A2|2009-06-03|Method for setting web tension in a processing machine
    EP2268427B1|2013-01-30|Operating method for a cold-rolling line with improved dynamics
    DE19511801A1|1996-10-02|Method and device for thickness control in film rolling
    DE102008053249A1|2010-04-29|Method for controlling a machine tool with driven axes
    DE102011105448A1|2012-12-27|Method for adjusting tension of web in e.g. shaftless printing machine, involves using control command from transmission element for adjusting tension of web in web portion by printing element
    DE102012017575A1|2014-03-06|Method for controlling processing register in processing machine for processing web, involves specifying controller parameter as function of variable clamp, when controlled value of controller parameter is controlled by control device
    DE102012002724A1|2013-08-14|Method for regulating web tension in processing machine used for processing product web e.g. shaftless printing press, involves delaying effect of regulation output value on actuating command for second actuator by delay time
    DE102013214731A1|2015-01-29|Computer-implemented method for web tension adjustment
    同族专利:
    公开号 | 公开日
    AT511029A3|2014-01-15|
    DE102010056295A1|2012-06-28|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    JPS5232035B2|1972-07-17|1977-08-18|
    US3921043A|1973-12-14|1975-11-18|Xerox Corp|Method and apparatus for maintaining substantially constant torque in a web transport apparatus|
    JPS6012704B2|1976-11-30|1985-04-03|Nippon Electric Co|
    JPH01203151A|1988-02-10|1989-08-15|Sumitomo Heavy Ind Ltd|Rotary type dancer roller|CN104760845A|2015-04-17|2015-07-08|广东溢达纺织有限公司|Fabric winding tension adjusting system and method for adjusting fabric winding tension|
    EP3416010B1|2017-06-12|2020-11-25|Siemens Aktiengesellschaft|Method and device for determining the tension in a web, computer program product, industrial installation and production machine|
    DE102017221222A1|2017-11-27|2019-05-29|Lenze Automation Gmbh|Method for setting values of a plurality of parameters of at least one controller of an electric drive system and electric drive system|
    法律状态:
    2016-05-15| REJ| Rejection|Effective date: 20160515 |
    优先权:
    申请号 | 申请日 | 专利标题
    DE201010056295|DE102010056295A1|2010-12-24|2010-12-24|Method for controlling web tension in web tension section, involves limiting web tension section by center winder and clamping unit, where actual-web tension in web tension section is controlled|
    [返回顶部]