WO2003104120A1 - Verfahren zur ermittlung eines verlaufs für den spannungsabfall einer bahn und verfahren zur einstellung der spannung - Google Patents
Verfahren zur ermittlung eines verlaufs für den spannungsabfall einer bahn und verfahren zur einstellung der spannung Download PDFInfo
- Publication number
- WO2003104120A1 WO2003104120A1 PCT/DE2003/001843 DE0301843W WO03104120A1 WO 2003104120 A1 WO2003104120 A1 WO 2003104120A1 DE 0301843 W DE0301843 W DE 0301843W WO 03104120 A1 WO03104120 A1 WO 03104120A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- voltage
- printing unit
- tension
- value
- web
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H23/00—Registering, tensioning, smoothing or guiding webs
- B65H23/04—Registering, tensioning, smoothing or guiding webs longitudinally
- B65H23/18—Registering, tensioning, smoothing or guiding webs longitudinally by controlling or regulating the web-advancing mechanism, e.g. mechanism acting on the running web
- B65H23/188—Registering, tensioning, smoothing or guiding webs longitudinally by controlling or regulating the web-advancing mechanism, e.g. mechanism acting on the running web in connection with running-web
- B65H23/1888—Registering, tensioning, smoothing or guiding webs longitudinally by controlling or regulating the web-advancing mechanism, e.g. mechanism acting on the running web in connection with running-web and controlling web tension
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H23/00—Registering, tensioning, smoothing or guiding webs
- B65H23/04—Registering, tensioning, smoothing or guiding webs longitudinally
- B65H23/044—Sensing web tension
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2511/00—Dimensions; Position; Numbers; Identification; Occurrences
- B65H2511/10—Size; Dimensions
- B65H2511/17—Deformation, e.g. stretching
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2557/00—Means for control not provided for in groups B65H2551/00 - B65H2555/00
- B65H2557/60—Details of processes or procedures
- B65H2557/63—Optimisation, self-adjustment, self-learning processes or procedures, e.g. during start-up
Definitions
- the invention relates to a method for determining a course for the tension drop of a web and a method for adjusting the tension according to the preamble of claims 1 and 10 respectively.
- DE 28 40 630 A1 discloses a device by means of which a stress-strain characteristic for a strip-like material can be determined.
- EP 07 37 638 A1 discloses a method for determining and regulating an elongation of a running material web, the elongation being determined on the basis of two measured speeds and the desired tension being regulated by means of the web tension.
- EP 0 933 201 A1 discloses a method for controlling a drive of a paper web, an operating point of a motor being set along a predetermined load curve with respect to the speed and torque.
- the invention has for its object to provide a method for determining a course for the tension drop of a web and a method for adjusting the tension.
- a complex determination of a stress-strain characteristic field under laboratory conditions can be omitted.
- a characteristic field does not yet provide any information about the moisture penetration actually to be expected in the printing press, so that this would also have to be measured in order to be able to make reliable statements about the rail transport to be expected.
- the web tensions can be set such that, on the one hand, the web runs after the printing unit due to too low tension, and on the other hand, web breakage due to excessive tension can be avoided.
- Figure 1 is a schematic representation of a printing unit with measuring points.
- Fig. 3 shows a first embodiment for the method for determining a
- Fig. 4 shows a second embodiment of the method for determining a
- a processing machine e.g. B. a print in particular
- Web-fed rotary printing press has at least one processing stage 01, e.g. B. a printing unit 01.
- the printing unit 01 which from a web 02, z. B. a paper web 01 is passed through.
- the printing unit 01 is in FIG. 1 as a so-called eight-high tower executed, which several, z. B. four, designed as double printing units 03 printing units 03.
- it can also be designed as a printing unit 01 having two nine-cylinder or two ten-cylinder systems, each with printing units 06 that can be set on a satellite cylinder 04.
- the web 02 runs from a reel changer 07 via at least one train group 08 and a measuring point 09 for measuring a tension S1 of the web 02 before it passes through a first of several pressure points 11. After the last printing point 11, it passes a second measuring point 12 for measuring a tension S2 of the web 02 and a second drawing group 13, before it is possibly fed to a former 16 via a third drawing group 14 via further units (not shown).
- the printing press has a feed mechanism 17 between the roll changer 07 and the first train group 08, by means of which the tension S1 can be changed.
- the web 02 When passing through the printing units 03; 06 in print-on position during production, the web 02 is moistened at least by the application of ink, and in particular by dampening solution in wet offset printing. As is known, their properties change, in particular the stress-strain characteristics.
- FIG. 2 the dependence of an elongation ⁇ (in%) on a web tension S, once in the dry state and once with a water content of 10%, is exemplary for a specific web 01 (type, thickness, surface quality, etc.).
- a temporal penetration behavior also plays a role, which in turn depends on the respective paper, but also on a throughput time, ie on the speed.
- a section length that is as constant as possible, ie an essentially constant stretch of the web 02 between the printing unit 01 and the former 16 is desirable.
- the second train group 13 is regulated, for example, with regard to its speed.
- the scheme can, for. B. to a constant speed or to a certain relative speed to another train group 08; 14 be regulated.
- the term rotational speed is to be understood as meaning a regulation with regard to a (relative) angular position or an angular velocity.
- moistening the previously dry web 02 by the printing unit to 10% water content would mean a voltage drop ⁇ S behind the printing unit 01 from approx. 50 daN / m to approx. 28 daN / m if the web stretched 02 is kept constant.
- a different type of paper for web 02 a different thickness, or a different moistening, the results would be completely different.
- a further criterion is that the levels S of a plurality of webs 02 brought together in front of the former 16 must be graded in their tension S.
- the printer or a control or regulating device When setting the voltages S, the printer or a control or regulating device must now meet all the criteria mentioned for the most varied types of paper and / or production conditions.
- the following procedure gives the printer or a control device a simple, inexpensive and safe procedure to hand to generate a characteristic and a corresponding adjustment of the voltages S; S1; S2.
- a diagram shows on one of its axes, here the abscissa, in linear plotting the web tension S in the area of interest, e.g. B. from 0 to 60 daN / m.
- the other axis here the ordinate, does not have to have a predetermined division and does not denote a "real" size.
- the ordinate can represent something like an unscaled strain ⁇ * when viewed in parallel with FIG. 2.
- the diagram also has one by the origin 2, the straight line G1 corresponds to the "dry" curve idealized as a linear, but with an essentially arbitrary slope.
- the straight line G1 is such that it forms an angle of 25 to 55 °, in particular 35 to 50 °, with the axis for the tension S, here the abscissa.
- the printing units 03; 06 may also be equipped with possibly full-page images in multi-color printing, here four-color printing.
- the printing machine is now brought to a speed between zero and the intended production speed.
- the speed is approximately 5,000 to 15,000 m / h, in particular 8,000 to 12,000 m / h, which in the case of double-sized cylinders, ie for cylinders with two printed images on their circumference, corresponds approximately to the speed in the unit cylinder revolutions / h.
- the press is started up with printing units 03 in the print-on position; 06, but temporarily without paint and water.
- the characteristic is generated using only one measuring point.
- the voltage S1 in front of the printing unit 01 is set to a specific voltage value x1, e.g. B. regulated to 50 daN / m. If only one measuring point is approached, this measuring point advantageously lies in the upper third of the voltage range that is suitable for production, e.g. from 40 to 60 daN / m.
- the determined voltage value x2 is now entered as point P2 parallel to the abscissa.
- a second straight line G2 is now laid through point P2 and the origin.
- the straight line G2 is comparable in idealized form to the curve “10% water” from FIG. 2.
- FIG. 3 In a more precise implementation of the method, as shown in FIG. 3, several measurement points for the voltage S1, z. B. approached three voltage values x1 such as at 30, at 40 and at 50 daN / m.
- the measuring points are preferably approached in the sequence from smaller voltage values x1 to larger ones.
- the ink and dampening solution can be switched off between the individual measuring points in order to adjust the two voltages S1 and S2 to the new voltage value x1.
- the latter can also be omitted if it can be assumed that the relative green setting of S1 and S2 for the dry state will not change if S1 is increased. The latter is usually the case.
- the printing machine is therefore at an above-mentioned speed and the printing units 03; 06 brought into pressure-on position without water and paint.
- a voltage value x1 of z. B. 30 daN / m set Before and after the printing unit 01, a voltage value x1 of z. B. 30 daN / m set. After ink and water on, the voltage S2 behind the printing unit 01 is read in the largely stationary state. The z. B. after 20s read voltage value x2, here z. B. 16 daN / m, is entered at the level of the point P1 belonging to the set voltage value x1 of the straight line G1 parallel to the abscissa as point P2.
- the straight line G2 is now laid through the zero point and the points P2. If, in particular in the upper range of the voltage values x2, there is a point P2 to the left of a straight line G2 specified by the remaining points P2, the straight line G2 should be placed through this point P2 in order to achieve a higher degree of security. If there is a greater deviation from a straight line G2, the individual points P2 which are adjacent to one another and the zero point can also be represented by partial sections (not shown) be connected to each other.
- the printer or a control or regulating device for each tension S1 in front of the printing unit 01 can determine the tension drop ⁇ S of the respective paper with the dampening agent guide selected for this production the most sensitive production - e.g. B. eight times dampening solution and ink on the paper - can occur.
- the printer or a control or regulating device can thus take a guideline value from the diagram as to which voltage S1-min it may set minimally before the printing unit 01 without the web 02 running after the printing unit 01.
- the arrows in FIG. 3 starting from the required minimum voltage S2-min, e.g. B. 8 daN / m, followed vertically to the straight line G2, subsequently horizontally to the straight line G1 and finally vertically to the resulting value for the minimum stress S1-min on the abscissa.
- the voltage S1-min to be set minimally in front of the printing unit 01 results for the present paper and the present production conditions e.g. B. to about 16 daN / m.
- the arrows in FIG. 3 are based on the required maximum tension S-max for the dry web 01 , e.g. B. 60 daN / m, followed vertically to the straight line G1, subsequently horizontally to the straight line G2 and finally vertically to the resulting value for the maximum stress S2-max on the abscissa.
- the maximum voltage S2-max to be set after the printing unit 01 results for the present paper and the present production conditions e.g. B. to about 30 daN / m.
- a third embodiment for the wet offset, in addition to the procedure described in the first or second example, one for the upper region lying tension value x1, here 50 daN / m, the amount of added dampening solution in the printing units 03; 06 varies.
- One point W is indicated by the so-called "water plume limit" WG, ie the amount of dampening solution is so large that so-called water plumes appear in the printed image, and the other point SG by the lubrication limit SG, ie the amount of dampening solution is so small that the lubrication is already Color occurs, formed.
- the highest level of security is achieved if the straight lines G1 and G4 are used in each case to determine the minimum tension S1-min before the printing unit 01 and the maximum tension S2-max after the printing unit 01.
- the straight lines G1 and G4 are used in each case to determine the minimum tension S1-min before the printing unit 01 and the maximum tension S2-max after the printing unit 01.
- the lower limit of voltage setting i.e. H. for S2-min from z. B. 8 daN / m after the printing unit 01 - wet web 02- this results in a minimum voltage S1-min to be set in front of the printing unit 01 of about 25 daN / m.
- the upper limit of the tension S2-max of the less moist web 02 after the printing unit 01 may be noticeably higher.
- the voltage drop ⁇ S z. B. be only 20% of the voltage S1 in front of the printing group 01. If the generation of the characteristic curve and / or the evaluation and regulation is carried out by a regulating or control device, either a linearization can be carried out on the basis of the one measuring point or on the basis of the several measuring points. B. a table or function is determined and stored, based on which the evaluation of the essential information for setting the voltage, z. B. the voltages S1-min and S2-max.
- ⁇ S xl * (l- a) voltage drop ⁇ S due to the dampening of the web (02) and tension build-up ⁇ S ', z. B. due to an interruption in moisture, are to be considered here in the same way and differ only in the starting point.
- An expected voltage build-up ⁇ S ' would be, for example, as
- a mean straight line, but preferably going through the origin, or its value a can be determined, for example, by mathematical methods. However, the largest value a can also be selected from the values a, which each result from the formation of quotients x2 / x1.
- the minimum and / or maximum voltage S1-min or S2-max obtained can be directly processed further in an automatic process for regulating or adjusting the voltage S and can be used, for example, to determine the limit values.
- the value a calculates (if necessary in sections), the corresponding limit values for the minimum and maximum voltages S1-min, S2 -min, S-max determined for the dry web 01, S2-max, and supplied to the regulating or control device for setting the tension S.
- the minimum voltage to be observed S2-min and / or the maximum permissible voltage S-max can be stored and predefined for an automated process in a regulating or control device.
- Both the graphic and the tabular or the mathematical method are based on the basic principle of first determining a course of an expected voltage drop by the voltage drop of a web 02 due to moistening in a printing unit 01, especially in the worst case, using at least one We determined a pair of voltage values x1 and x2 in front of and behind the printing unit 01. This is done by initially having essentially the same value x1 for the voltage S1; in front of and behind the printing unit 01, without ink and dampening solution. S2 is set, then ink and, if appropriate, dampening solution is switched on, and after essentially stationary conditions have been reached, the value x2 for the voltage S2 behind the printing unit 01 is measured.
- a fictitious curve for the voltage drop ⁇ S caused by the dampening in the printing unit 01 as a function of a voltage S is now determined by idealization.
- this is done by using at least sectionally linearized replacement characteristic curves for the dependence of an unscaled strain ⁇ * on the tension S, e.g. B by the fact that through the voltage value x1, or the voltage values x1, and the zero point, as well as through the voltage value x2, or the voltage values x2, straight lines G1; G2; G3; G4 as a replacement straight line.
- a value a for the slope of the linearized relationship between x1 and x2 is formed by forming quotients between the mutually assigned voltage values x1 and x2. With several pairs of voltage values x1 and x2, this can also be done in sections by forming the difference quotient.
- the course obtained for the expected voltage drop is used to set the voltage S1; S2 used before and / or after the printing unit 01, by virtue of a predefinable minimum tension S2-min behind the printing unit 01, a minimal tension S1-min in front of the printing unit, and / or due to a predeterminable maximum tension S-max for the dry web 01 a maximum permissible voltage S2-max behind the printing unit 01 is determined.
- the information about the determined course can advantageously for the specific paper, possibly i. V. m. the specific production, be stored in a storage unit or the regulating or control device, and be called up for later productions without having to carry out a new measurement.
Landscapes
- Inking, Control Or Cleaning Of Printing Machines (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
- Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs (AREA)
- Emergency Protection Circuit Devices (AREA)
- Power Conversion In General (AREA)
- Control Of Electric Motors In General (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE50305052T DE50305052D1 (de) | 2002-06-11 | 2003-06-04 | Verfahren zur ermittlung eines verlaufs für den spannungsabfall einer bahn und verfahren zur einstellung der spannung |
EP03737929A EP1519887B1 (de) | 2002-06-11 | 2003-06-04 | Verfahren zur ermittlung eines verlaufs für den spannungsabfall einer bahn und verfahren zur einstellung der spannung |
AU2003245855A AU2003245855A1 (en) | 2002-06-11 | 2003-06-04 | Method for determining the course of a drop in tension of a strip and method for adjusting the tension |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10225824.4 | 2002-06-11 | ||
DE10225824A DE10225824B4 (de) | 2002-06-11 | 2002-06-11 | Verfahren zur Einstellung einer Bahnspannung |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2003104120A1 true WO2003104120A1 (de) | 2003-12-18 |
Family
ID=29723117
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE2003/001843 WO2003104120A1 (de) | 2002-06-11 | 2003-06-04 | Verfahren zur ermittlung eines verlaufs für den spannungsabfall einer bahn und verfahren zur einstellung der spannung |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1519887B1 (de) |
AT (1) | ATE339378T1 (de) |
AU (1) | AU2003245855A1 (de) |
DE (2) | DE10225824B4 (de) |
WO (1) | WO2003104120A1 (de) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102005054785B4 (de) | 2005-11-15 | 2010-08-19 | Koenig & Bauer Aktiengesellschaft | Verfahren zum Betrieb eines Einzugwerks einer Druckmaschine |
DE102005056802A1 (de) * | 2005-11-29 | 2007-05-31 | Bosch Rexroth Ag | Regelung der Bahnspannung einer Warenbahn |
DE102009019624A1 (de) | 2009-04-30 | 2010-11-04 | Robert Bosch Gmbh | Verfahren zur Bestimmung wenigstens eines Reglerparameters eines Regelglieds in einem Bahnspannungs-Regelkreis für eine Bearbeitungsmaschine |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4004510A (en) * | 1973-11-13 | 1977-01-25 | J. Bobst & Fils S.A. | Equipment for introduction of a strip of paper, cardboard or similar material into a printing machine |
EP0737638A1 (de) * | 1995-04-12 | 1996-10-16 | Stork Contiweb B.V. | Verfahren und Vorrichtung zum Berechnen und Regeln der Längung einer laufenden Materialbahn |
US5845386A (en) * | 1996-08-30 | 1998-12-08 | Taper-Lok Corporation | Method for connecting a multiple-piece elbow assembly |
DE10027471A1 (de) * | 2000-02-04 | 2001-08-09 | Koenig & Bauer Ag | Verfahren zur Regelung einer Bahnspannung in einer Rotationsdruckmaschine |
DE10035787A1 (de) * | 2000-07-22 | 2002-01-31 | Koenig & Bauer Ag | Verfahren zur Regelung einer Bahnspannung |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2840630C3 (de) * | 1978-09-19 | 1981-12-17 | Deutsche Forschungsgesellschaft für Druck- und Reproduktionstechnik e.V. (FOGRA), 8000 München | Vorrichtung zur Messung der Zugfestigkeit und/oder der Dehnung eines bahnförmigen Meßobjektes |
ES2208978T3 (es) * | 1998-02-02 | 2004-06-16 | Abb Schweiz Ag | Procedimiento para regular el accionamiento de una via de papel en una maquina de impresion. |
-
2002
- 2002-06-11 DE DE10225824A patent/DE10225824B4/de not_active Expired - Fee Related
-
2003
- 2003-06-04 AT AT03737929T patent/ATE339378T1/de not_active IP Right Cessation
- 2003-06-04 DE DE50305052T patent/DE50305052D1/de not_active Expired - Fee Related
- 2003-06-04 AU AU2003245855A patent/AU2003245855A1/en not_active Abandoned
- 2003-06-04 WO PCT/DE2003/001843 patent/WO2003104120A1/de active IP Right Grant
- 2003-06-04 EP EP03737929A patent/EP1519887B1/de not_active Expired - Lifetime
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4004510A (en) * | 1973-11-13 | 1977-01-25 | J. Bobst & Fils S.A. | Equipment for introduction of a strip of paper, cardboard or similar material into a printing machine |
EP0737638A1 (de) * | 1995-04-12 | 1996-10-16 | Stork Contiweb B.V. | Verfahren und Vorrichtung zum Berechnen und Regeln der Längung einer laufenden Materialbahn |
US5845386A (en) * | 1996-08-30 | 1998-12-08 | Taper-Lok Corporation | Method for connecting a multiple-piece elbow assembly |
DE10027471A1 (de) * | 2000-02-04 | 2001-08-09 | Koenig & Bauer Ag | Verfahren zur Regelung einer Bahnspannung in einer Rotationsdruckmaschine |
DE10035787A1 (de) * | 2000-07-22 | 2002-01-31 | Koenig & Bauer Ag | Verfahren zur Regelung einer Bahnspannung |
Also Published As
Publication number | Publication date |
---|---|
AU2003245855A1 (en) | 2003-12-22 |
DE10225824A1 (de) | 2004-01-15 |
EP1519887B1 (de) | 2006-09-13 |
DE10225824B4 (de) | 2006-11-02 |
EP1519887A1 (de) | 2005-04-06 |
ATE339378T1 (de) | 2006-10-15 |
DE50305052D1 (de) | 2006-10-26 |
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