EP1030749B1 - Vorrichtung zum abwickeln eines bandes von einer spule - Google Patents

Vorrichtung zum abwickeln eines bandes von einer spule Download PDF

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Publication number
EP1030749B1
EP1030749B1 EP98945454A EP98945454A EP1030749B1 EP 1030749 B1 EP1030749 B1 EP 1030749B1 EP 98945454 A EP98945454 A EP 98945454A EP 98945454 A EP98945454 A EP 98945454A EP 1030749 B1 EP1030749 B1 EP 1030749B1
Authority
EP
European Patent Office
Prior art keywords
coil
strip
arm
supporting member
feeding
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.)
Expired - Lifetime
Application number
EP98945454A
Other languages
English (en)
French (fr)
Other versions
EP1030749A1 (de
Inventor
Svein Arne Lindso
Bjorn Ottesen
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.)
Spiro SA
Original Assignee
Spiro SA
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
Priority claimed from SE9703699A external-priority patent/SE518635C2/sv
Application filed by Spiro SA filed Critical Spiro SA
Publication of EP1030749A1 publication Critical patent/EP1030749A1/de
Application granted granted Critical
Publication of EP1030749B1 publication Critical patent/EP1030749B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B65H23/182—Registering, tensioning, smoothing or guiding webs longitudinally by controlling or regulating the web-advancing mechanism, e.g. mechanism acting on the running web in unwinding mechanisms or in connection with unwinding operations
    • B65H23/185—Registering, tensioning, smoothing or guiding webs longitudinally by controlling or regulating the web-advancing mechanism, e.g. mechanism acting on the running web in unwinding mechanisms or in connection with unwinding operations motor-controlled
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/30—Orientation, displacement, position of the handled material
    • B65H2301/32—Orientation of handled material
    • B65H2301/325—Orientation of handled material of roll of material
    • B65H2301/3251—Orientation of handled material of roll of material vertical axis
    • 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
    • B65H2511/20—Location in space
    • B65H2511/21—Angle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2513/00—Dynamic entities; Timing aspects
    • B65H2513/10—Speed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2553/00—Sensing or detecting means
    • B65H2553/20—Sensing or detecting means using electric elements
    • B65H2553/21—Variable resistances, e.g. rheostats, potentiometers or strain gauges

Definitions

  • the present invention relates to an apparatus for unwinding a strip from a coil and feeding the strip to an assembly for processing the strip.
  • the invention is in particular applicable to an apparatus for unwinding a metal strip from a coil and feeding the strip to a machine for the manufacture of helically-wound lock-seam tubing, a so-called tube former.
  • Such tubing is especially used for ventilation ducts.
  • decoiler Equipment for unwinding a metal strip from a coil is often referred to as decoilers by persons skilled in the art. For practical reasons, the term decoiler will be used in the following description.
  • a known decoiler according to the preamble of claim 1 marketed by the Dutch company "Brain” has a circular plate or table which is rotatable about a vertical axis and which supports the coil horizontally.
  • the coil-supporting table is supported by rollers which are in frictional contact with the lower side of the rotatable table.
  • One of the rollers is driven and two rollers are freely rotatable.
  • the table is driven by a hydrostatic speed variator acting on the drive roller via a coupling.
  • the three rollers are equidistantly spaced from each other at the peripheral portion of the rotatable table.
  • the axes of rotation of the rollers are perpendicular to the vertical axis of rotation of the coil table, and said axes of rotation of the rollers extend radially from said vertical axis.
  • the metal strip is guided from the coil to a strip-guiding unit, in which the strip is held between rollers.
  • the strip-guiding unit is attached to the upper end of an arm which is pivotally mounted on the base structure of the decoiler.
  • the strip is fed from the strip-guiding unit to a forming head of the tube former by means of a drive roller arrangement before the forming head.
  • the arm supporting the strip-guiding unit is movable towards and away from the coil-supporting table by said pivotal movement.
  • the pivotal movement of the arm is carefully adjusted. It is also important to control the feeding rate of the strip and, of course, the rotational speed of the coil-supporting table.
  • the feeding of the strip into the forming head is stopped.
  • the rotation of the coil table must be stopped, otherwise the slack of the strip between the coil table and the forming head will be too large.
  • the arm supporting the strip-guiding unit is moved away from the coil table as soon as the production is stopped. This movement of the arm takes up most of the slack of the strip and keeps an appropriate tension of the strip.
  • the rotation of the coil table must start quickly and the arm is moved towards the coil table in order to "catch" the slack of the strip.
  • the drive roller wheel is connected to the speed variator via a coupling.
  • An object of the present invention is to provide an improved apparatus or decoiler for unwinding a strip from a coil, by means of which the above-mentioned problems are solved.
  • a special object of the invention is that it should be possible to use the improved apparatus for the manufacture of different products, although the main object is to improve the manufacture of helically-wound lock-seam tubing.
  • an apparatus for unwinding a strip from a coil and feeding the strip to an assembly for processing the strip has a rotatable table for supporting the coil and a drive unit for rotating the coil-supporting table.
  • the drive unit has a driving gear which meshes with a toothed periphery of a gear ring mounted on the table and which is driven by a motor.
  • the apparatus has a device for guiding and tensioning the strip between the coil-supporting table and the processing assembly.
  • This device includes a pivotable arm having a strip-guiding unit which is movable towards and away from the coil-supporting table by pivoting of the arm, and means for controlling the movement of the arm and thereby the movement of the strip-guiding unit in accordance with the strip-feeding rate and the rotational speed of the coil-supporting table.
  • control means comprises a potentiometer which is mechanically connected to the arm and whose output voltage signal is proportional to the position of the arm.
  • the output voltage signal controls the rotational speed of the coil-supporting member and thereby the feeding of the strip to the processing assembly.
  • said potentiometer has a first end position corresponding to a first end position of the arm remotest from the coil-supporting member, and a second position corresponding to a second end position of the arm closest to the coil-supporting member.
  • the output voltage signal of the potentiometer has values within a range limited by the end positions of the potentiometer.
  • control means further comprises a frequency converter for converting the output voltage signal from the potentiometer to a frequency signal which controls the rotational speed of the motor driving the rotatable coil-supporting member by the gear mesh.
  • the invention confers several advantages.
  • the inventive decoiler is mechanically improved by the new drive arrangement.
  • the former rolling wheels are avoided, and thanks to the gear drive at the periphery of the gear ring, a very reliable rotation of the coil-supporting member is achieved.
  • the load on the motor is lower since the gear mesh at the periphery of the gear ring provides a torque with respect to the vertical axis of rotation of the coil-supporting member.
  • the inventive decoiler is also improved in terms of controlling the unwinding and feeding of the strip. Thanks to the new control means acting on the pivotable arm which supports the strip-guiding unit, the delays for acceleration and retardation can be significantly reduced. In practical tests, the acceleration time has been 1.0 s and the retardation time has been 0.8 s at standard strip-feeding rates of about 60 m/min.
  • Fig. 1 is a side view of a decoiler according to an embodiment of the invention.
  • Fig. 2 is a plan view of the decoiler.
  • Fig. 3 is a view III-III in Fig. 2 on a larger scale.
  • Fig. 4 is a view IV-IV in Fig. 2 on a larger scale
  • Fig. 5 is a diagram illustrating components of control means associated with the decoiler.
  • Figs 1-2 show an apparatus 1 for unwinding a strip 2 from a coil 3.
  • the strip 2 is fed to an assembly 4 for processing the strip 2.
  • the apparatus is a so-called decoiler 1
  • the strip is a metal strip 2 which is fed to said processing assembly, which in the example is a machine 4 (tube former) for manufacturing helically-wound lock-seam tubing 5 from a forming head 6 known per se.
  • the strip 2 is fed in the direction of the arrows, and the tube former 4 has a feeding unit 7 which in known a manner is equipped with drive rollers (not shown) for feeding the strip 2 into the forming head 6.
  • the strip-feeding unit 7 is driven by a motor 8.
  • the coil 3 is supported by a rotatable member in the shape of a circular, horizontal table 10 having a vertical axis of rotation C 1 .
  • the annular coil 3 is placed around a central part 9 extending vertically from the coil-supporting table 10.
  • the coil 3 is partially cut away for illustrating a drive unit for rotating the coil-supporting table 10.
  • This drive unit comprises a gear ring 11 which is non-rotatably mounted on the lower side of the table 10, see also Fig. 4.
  • the axis of rotation of the gear ring 11 coincides with the axis of rotation C 1 of the rotatable table 10.
  • the gear ring 11 meshes with and is driven by a driving gear 12 driven by a motor 13 mounted on a base structure 14 of the decoiler 1 under the table 10.
  • the driving gear 12 has a vertical axis of rotation C 2 which is spaced from and parallel with the axis of rotation C 1 of the gear ring 11 and of the rotatable table 10.
  • the gear mesh 15 between the driving gear 12 and the gear ring 11 is spaced from said axis of rotation C 1 since the gear mesh 15 is on the periphery of the gear ring 11.
  • the gear mesh 15 creates a torque with respect to the main axis of rotation C 1 , which results in an improved rotation of the table 10 causing a lower load on the motor 13 of the drive unit than in known decoilers.
  • the rotatable table 10 can be driven very smoothly without vibrations and wear problems encountered in known decoilers. Especially, the table 10 can be stopped and started faster than in known decoilers in intermittent operation of the tube former 4, which is frequently stopped.
  • the decoiler 1 of the invention further comprises a device for guiding and tensioning the strip between the coil-supporting table 10 and the tube former 4 (see Fig. 1).
  • This device includes a pivotable arm 20, which at its upper end has a strip-guiding unit 21 known per se, including guide rollers 22 between which the strip 2 is engaged.
  • the lower end of the arm 20 is pivotably mounted on the base structure 14 by means of a bolt 23 shown in Fig. 3.
  • the arm 20 is pivoted about said pivot bolt 23 as is shown by a double arrow A. This movement is accomplished by a link mechanism 24 connecting the lower end portion of the arm 20 with a shaft 25 of a rotational potentiometer 26 to be further described below.
  • the potentiometer 26 controls the movement of the arm 20 and thereby the movement of the strip-guiding unit 21 in accordance with the feeding rate of the feeding unit 7 of the tube former 4 as well as the rotational speed of the coil-supporting table 10. As described above, the potentiometer 26 is mechanically connected to the arm 20, which means that the output voltage signal of the potentiometer 26 is proportional to the position of the arm 20. Further, the output voltage signal of the potentiometer 26 is proportional to the rotational speed of the coil table 10.
  • the potentiometer 26 is of the rotational type having two end positions 29 and 30 corresponding to the end positions of the arm 20.
  • the limited rotation of the potentiometer 26 between these end positions 29, 30 is preferably about 45° corresponding to a 45° angular range of movement of the arm 20.
  • the output voltage signal of the potentiometer 26 can vary within the range limited by the end positions 29, 30 of the potentiometer 26.
  • the output voltage signal from the potentiometer 26 is fed to a frequency converter 31 which converts the output voltage signal to a frequency signal which controls the rotational speed of the motor 13 which drives the rotatable coil-supporting table 10 schematically shown in Fig. 5.
  • the output voltage signal of the potentiometer 26 has values within a range limited by the end positions of the arm 20.
  • the decoiler 1 of this embodiment functions as follows.
  • the arm 20 When the tube-forming production is started by activating the feeding unit 7 feeding the strip 2 to the forming head 6, the arm 20 is moved towards the coil-supporting table 10 for taking up slack of the strip 2 and for maintaining an appropriate tension of the strip 2. Then the link mechanism 24 rotates the shaft 25 of the potentiometer 26 in clockwise direction with respect to Fig. 3 (double arrow B), whereby a proportional output voltage signal is fed from the potentiometer 26 via the frequency converter 31 to the motor 13, which activates the rotation of the coil-supporting table 10 by the gear arrangement 11, 12.
  • the arm 20 is moved in a direction away from the coil table 10, whereby the link mechanism 24 rotates the shaft 25 of the potentiometer 26 in counter-clockwise direction, thereby deactivating the motor 13 through a corresponding feeding of signals in accordance with the description above.
  • the delay for acceleration and retardation as described above can be substantially reduced by means of the decoiler 1 of the invention.
  • the acceleration time is about 1.0 s and the retardation time is about 0.8 s. This is much less than in known decoilers available on the market.
  • a further advantage is that the load on the drive motor 13 is much lower than in known decoilers.
  • the arm 20 is slidably mounted on the base structure 14, as is schematically shown in Fig. 2 (arrow D). Since the arm 20 is displaceable in a direction substantially perpendicular to the feeding direction of the strip 2 into the tube former 4, it is easy to adjust the decoiler 1 in accordance with different widths of the strip 2 and different diameters of the coil 3.

Landscapes

  • Unwinding Webs (AREA)
  • Winding, Rewinding, Material Storage Devices (AREA)
  • Replacement Of Web Rolls (AREA)
  • Unwinding Of Filamentary Materials (AREA)
  • Guides For Winding Or Rewinding, Or Guides For Filamentary Materials (AREA)

Claims (8)

  1. Vorrichtung zum Abwickeln eines Bandes (2) von einer Spule (3) und zur Zufuhr des Bandes (2) an eine Baugruppe (4) zur Verarbeitung des Bandes (2), die umfasst:
    ein drehbares, spulentragendes Bauteil (10), das die Spule (3) trägt,
    eine Antriebseinheit (12, 13) zum Drehen des spulentragenden Bauteils (10),
    eine Einheit (7) zur Zufuhr des Bandes (2) zur Verarbeitungs-Baugruppe (4) und
    eine Vorrichtung (20, 21) zum Führen und Spannen des Bandes (2) zwischen dem spulentragenden Bauteil (10) und der Verarbeitungs-Baugruppe (4), wobei die Vorrichtung (20, 21) umfasst:
    einen drehbaren Arm (20) mit einer Bandführungseinheit (21), die vom und zum bandtragenden Bauteil (10) durch Drehen des Armes (20) bewegbar ist,
    wobei die Vorrichtung gekennzeichnet ist dadurch, dass das spulentragende Bauteil (10) einen koaxialen Zahnkranz (11) mit einem Umfangsabschnitt aufweist,
    die Antriebseinheit (12, 13) ein Antriebszahnrad (12) aufweist, das sich mit dem Umfangsabschnitt des Zahnkranzes (11) in Eingriff befindet und durch einen Motor (13) angetrieben wird, und
    durch eine Vorrichtung (24 - 26) zum Steuern der Bewegung des Armes (20) und dadurch der Bewegung der Bandführungseinheit (21) in Übereinstimmung mit der Zufuhrgeschwindigkeit der Zufuhreinheit (7.) und der Drehgeschwindigkeit des spulentragenden Bauteils (10).
  2. Vorrichtung nach Anspruch 1, wobei die Steuervorrichtung (24 - 26) ein Potentiometer (26) umfasst, das mechanisch mit dem Arm (20) verbunden ist und dessen Ausgangsspannungssignal proportional zur Lage des Armes (20) ist, wobei das Ausgangsspannungssignal die Drehgeschwindigkeit des spulentragenden Bauteils (10) und dadurch die Zufuhr des Bandes (2) an die Verarbeitungs-Baugruppe (4) regelt.
  3. Vorrichtung nach Anspruch 2, wobei das Potentiometer (26) eine erste Endlage entsprechend einer ersten Endlage des Armes (20) im größten Abstand von dem spulentragenden Bauteil (10) und eine zweite Lage entsprechend einer zweiten Endlage des Armes (20) im geringsten Abstand zum spulentragenden Bauteil (10) aufweist, wobei das Ausgangsspannungssignal des Potentiometers (26) Werte innerhalb eines Bereichs umfasst, der durch die Endlagen des Potentiometers (26) begrenzt ist.
  4. Vorrichtung nach Anspruch 2 oder 3, wobei das Potentiometer (26) vom Drehtyp mit einer Welle (25) ist, die mit dem Arm (20) durch eine Verbindungsvorrichtung (24) verbunden ist.
  5. Vorrichtung nach den Ansprüchen 2 bis 4, wobei die Steuereinrichtung (24 - 26) des Weiteren einen Frequenzwandler (31) zum Umwandeln des Ausgangsspannungssignals des Potentiometers (26) in ein Frequenzsignal aufweist, das die Drehgeschwindigkeit des Motors (13) regelt, der das drehbare, spulentragende Bauteil (10) über den Zahneingriff (15) antreibt.
  6. Vorrichtung nach einem der vorangegangenen Ansprüche, wobei das spulentragende Bauteil einen kreisförmigen, drehbaren Tisch (10) auf dem die Spule (3) gesetzt ist und der eine Drehachse koaxial zur Drehachse (C1) des Zahnkranzes (11) aufweist, der nicht drehbar an dem Tisch (10) befestigt ist.
  7. Vorrichtung nach einem der vorangegangenen Ansprüche, wobei das Antriebszahnrad (12) eine Drehachse (C2) aufweist, die parallel und beabstandet zur Drehachse (C1) des Zahnkranzes (11) des drehbaren, spulentragenden Bauteils (10) verläuft.
  8. Vorrichtung nach einem der vorangegangenen Ansprüche, wobei der Arm (20) gleitbar auf einem Grundrahmen (14) derart befestigt ist, dass er in einer Richtung verschiebbar ist, die im Wesentlichen senkrecht zur Zufuhrrichtung des Bandes (2) in die Verarbeitungs-Baugruppe (4) verläuft.
EP98945454A 1997-10-10 1998-10-07 Vorrichtung zum abwickeln eines bandes von einer spule Expired - Lifetime EP1030749B1 (de)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US94895397A 1997-10-10 1997-10-10
SE9703699 1997-10-10
SE9703699A SE518635C2 (sv) 1997-10-10 1997-10-10 Anordning för avlindning av ett band från en rulle
US948953 1997-10-10
PCT/IB1998/001556 WO1999019094A1 (en) 1997-10-10 1998-10-07 Apparatus for unwinding a strip from a coil

Publications (2)

Publication Number Publication Date
EP1030749A1 EP1030749A1 (de) 2000-08-30
EP1030749B1 true EP1030749B1 (de) 2003-02-26

Family

ID=26663100

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98945454A Expired - Lifetime EP1030749B1 (de) 1997-10-10 1998-10-07 Vorrichtung zum abwickeln eines bandes von einer spule

Country Status (6)

Country Link
EP (1) EP1030749B1 (de)
JP (1) JP2001519240A (de)
AT (1) ATE233136T1 (de)
AU (1) AU9277298A (de)
DE (2) DE29721131U1 (de)
WO (1) WO1999019094A1 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10343421A1 (de) * 2003-09-19 2005-04-14 Voith Paper Patent Gmbh Vorrichtung und Verfahren zum Entfernen von Ausschuss einer Materialbahn von einem Wickeltambour
DE102010016063B4 (de) * 2010-03-22 2023-10-05 Krones Aktiengesellschaft Etikettiermaschine zur Verarbeitung von Rollenmaterial und Vorrichtung zur Aufnahme von Rollenmaterial
SE545974C2 (en) * 2023-05-04 2024-04-02 Spiro Sweden AB Sheet metal decoiler

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2845235A (en) * 1954-06-25 1958-07-29 Gen Electric Electromagnetic wire tension device
US3461703A (en) * 1964-10-30 1969-08-19 Production Machinery Corp Apparatus for uncoiling and processing metal strip
DE2548127C3 (de) * 1975-10-28 1979-08-23 Herbert Ing.(Grad.) 2070 Ahrensburg Zimmermann Abhaspelstation einer Vorrichtung zum Herstellen geschweißter Schraubennah trohre

Also Published As

Publication number Publication date
ATE233136T1 (de) 2003-03-15
EP1030749A1 (de) 2000-08-30
DE69811712T2 (de) 2003-09-18
DE69811712D1 (de) 2003-04-03
AU9277298A (en) 1999-05-03
DE29721131U1 (de) 1998-04-09
WO1999019094A1 (en) 1999-04-22
JP2001519240A (ja) 2001-10-23

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