US3860188A - Strip accumulator - Google Patents

Strip accumulator Download PDF

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Publication number
US3860188A
US3860188A US317178A US31717872A US3860188A US 3860188 A US3860188 A US 3860188A US 317178 A US317178 A US 317178A US 31717872 A US31717872 A US 31717872A US 3860188 A US3860188 A US 3860188A
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United States
Prior art keywords
strip
coil
turns
rollers
feed
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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
US317178A
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English (en)
Inventor
Harry Osborne Bradshaw
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Tube Products Ltd
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Tube Products Ltd
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Publication date
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H19/00—Changing the web roll
    • B65H19/10—Changing the web roll in unwinding mechanisms or in connection with unwinding operations
    • B65H19/14—Accumulating surplus web for advancing to machine while changing the web roll
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C49/00—Devices for temporarily accumulating material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2408/00—Specific machines
    • B65H2408/20—Specific machines for handling web(s)
    • B65H2408/21—Accumulators
    • B65H2408/211—Coil type accumulator

Definitions

  • STRIP ACCUMULATOR This invention relates to a novel form of strip accumulator, that is to say, means for storing strip being fed from a source of supply, such as a coil of strip, to a machine or other apparatus which processes or uses the strip, so that the machine or other apparatus can be kept running without interruption whilst the source is replenished.
  • a source of supply such as a coil of strip
  • machine or other apparatus which processes or uses the strip
  • the aim of the present invention is to provide a new form of strip accumulator that is simple and reliable in operation, and easy to control.
  • a method of feeding strip material to a process while providing a variable reserve to allow for intermittent interruptions of the feed-in and or withdrawal of the strip while maintaining the withdrawal of feed-in respectively comprising forming the strip into a single spiral coil having a fixed number of turns and having its axis substantially vertical, feeding the strip onto the inside of the coil while withdrawing the strip from the outside of the coil, defining the maximum and minimum radii which the turns of the coil are allowed to have, the difference between these radii being greater than the radial space occupied by the given number of turns of the coil when those turns are close-packed, and allowing the turns to contract successively, or expand successively, to provide a reserve represented by the difference between the expanded and contracted circumferential lengths of the turns that allows continued withdrawal in the absence of feed-in or continued feed-in in the absence of withdrawal, up to the limit of the number
  • a strip accumulator for carrying out this method comprises a table designed to support a single spiral coil of strip with its axis substantially vertical and including means for rotating the coil about its axis and for guiding strip onto the inside of the coil and guiding strip off the outside of the coil, and means defining the inner and outer limits of the radius of the coil, the arrangement being such that when the in-feed of strip stops, the strip can continue to be withdrawn from the coil, the number of turns on the coil then remaining constant but their mean diameter decreasing.
  • the table is not a single rotary platform but is formed by an array of radially extending, or nearly radially extending, rollers.
  • these rollers do not have their axes horizontal but have their inner ends higher than their outer ends so that they define a table which is slightly conical. They therefore tend to urge the turns outwards, i.e., towards their maximum diameter.
  • FIGS. 1 and 2 are diagrammatic plan views of a coil to illustrate the principle behind the invention
  • FIG. 3 is a plan view of a practical form of the invention, showing the apparatus loaded to its maximum capacity
  • FIG. 4 shows the apparatus of FIG. 3 with the feed-in stopped and the strip continuing to be withdrawn from the coil;
  • FIG. 5 shows the same apparatus at is minimum capacity, i.e. after the maximum permissible amount of reserve strip has been withdrawn from the coil;
  • FIG. 6 is a vertical section, in a plane containing the axis of the coil, through one side of a modified form of the apparatus of FIGS. 3, 4 and 5;
  • FIG. 7 is a diagrammatic plan view showing a modified form of feed-in.
  • a strip 1 of material for example steel strip to be fed to a tubemaking mill
  • the incoming strip is fed through rollers 3 onto the inside of the coil while'the out-going strip, passing to the mill, is taken simultaneously from the outside of the coil through rollers 4 while the coil is rotated
  • the number of turns on the coil will remain constant. If the rate of feed-in is equal to the rate of feed-out the dynamic conditions remain constant.
  • the innermost turn is turning slightly faster than the outermost turn, so that their circumferential speeds remain equal.
  • the maximum diameter of the outermost turn is determined by a set of guide rollers 5.
  • the feed-in is halted, for example to allow the leading end of a new strip to be welded to the tail end of the strip that is passing through the coil, it is possible to continue rotating the coil and withdrawing strip from the outside of the coil and passing it to the mill.
  • the number of turns in the coil cannot change but their diameter does; the innermost turn contracts until it engages a set of rollers 6 that determines its minimum diameter, followed by the next turn and so on, until we reach the condition shown in FIG. 2, where all the turns have contracted down to their minimum diameter.
  • the total reserve. of strip yielded up in this way is equal to the number of turns multiplied by the difference between the mean peripheral length of the turns in the condition shown in FIG. 1 and the mean peripheral length of the turns in the condition shown in FIG. 2.
  • the feed-in must be resumed. It can be resumed at a linear rate higher than the rate of withdrawal. In fact at this stage it would be possible to continue the feeding in even with the withdrawal halted altogether, so the invention is applicable equally well where the withdrawal, as well as or instead of the feed-in is liable to be interrupted.
  • the feed-in can be allowed to overtake the withdrawal until we have once again reached the conditions shown in FIG. 1. By rotating the coil at an appropriate speed we can again ensure that friction between the turns is no problem, as change from minimum to maximum can be caused to start with the outermost turn and end with the innermost turn.
  • FIGS. 3, 4 and 5 are plan views of a practical embodiment.
  • a supporting table by which the coil is rotated is formed by an array of twelve long thin cylindrical rollers 7 mounted in pairs.
  • all the rollers are positively driven by individual variablespeed electric motors (one of which is indicated diagrammatically at M in FIG. 3) but in a modification some of the rollers'could be idlers, or there could be additional idler rollers between the adjacent driven pairs.
  • the idler rollers could be shorter than the driven ones, for example only half their length or less, and extend inwards from the outer periphery of the table to stop well short of its centre.
  • the axes of the rollers are shown as being very nearly 'truly radial with respect to the axis of the coil. However so that they slope slightly downwards and outwards to define a slightly conicalsupporting surface rather than a flat one. This serves the same purpose as the skewing,
  • the feed-in rollers 3 and the withdrawing rollers 4 are also indpendently driven by respective variable speed electric motors.
  • the maximum diameter of the coil is defined by a ring of idler rollers 5.
  • a bridge 9 mounted above the table is a bridge 9 on which are mounted pinch rollers 10 for the incoming strip, which comes in horizontally above the coil and then spirals down to the level of the coil.
  • the bridge 9 is shown partially broken away in FIGS. 3, 4 and 5 to reveal the spider 8.
  • FIG. 3 shows the table carrying its maximum capacity, which in the example shown is turns, and they are at their maximum diameter. It will be understood that the number of turns to be used will depend on the gauge of the strip and the reserve capacity required.
  • the strip accumulator is then ready for operation.
  • the feed-in rollers 3, the supporting rollers 7 and the withdrawal rollers 4 are all driven in synchronism to give the same linear speed and the coil rotated, but the dynamic conditions remain constant.
  • the inner rollers 6 are moved to their outermost positions, shown in FIG. 4. This state of affairs continues until the tail end of the strip is approaching the feed-in rollers 3. At this moment the drive to the feed-in rollers is stopped, but the supporting rollers 7 as well as the withdrawal rollers 4 carry on. As a result the innermost turn of the coil contracts until its contraction is limited by the rollers 6. This condiition is shown in FIG. 4.
  • FIG. 5 shows this condition about to be reached. If this state of affairs is reached the mill will suddenly be in trouble and the strip may break and so we preferably provide an emergency stop in the form of four limit switches (not shown) spaced around the periphery of the table between the rollers 5 and kept closed by the presence of the outermost turn of the coil. As soon as any one of these switches is opened, indicated that the outermost turn is starting to contract and so the reserve is used up, the power to the mill is cut off.
  • the size of the strip accumulator will be selected, in relation to the speed of the mill and the gauge of the strip as well as the time taken to weld on a new strip, to give an ample margin of safety.
  • the minimum diameter to which the strip can be coiled i.e., the circle defined by the rollers 6 in their outermost positions, is determined not only by the gauge of the strip but also by its width, since it will be difficult to feed a very wide strip in the necessary spiral path into the centre of the coil if the centre is unduly small.
  • the radial positions of the pair of pinch rollers on the bridge 9 is preferably adjustable in step with the movement of the rollers 6, as will be seen by comparing FIGS. 3 and 4.
  • These rollers may be arranged to impart a deliberate curvature to the strip to help if fit snugly into the coil.
  • rollers 6 and pinch rollers 10 can be returned to their radially innermost positions.
  • the feed-in rollers 3 and also the supporting rollers 7 can be speeded up to a lincar speed higher than that of the withdrawal rollers (whose speed is governed by the mill to which the strip is fed). Consequently the outermost one of those turns of the coil which had contracted will overtake the outer turns and will expand to lie against the inner one of them, followed by the next, and so on, until the whole coil resumes the condition shown in FIG. 3, holding the maximum reserve ready for the next interruption of the feed-in.
  • outer rollers 5 could be omitted, replaced simply by a fixed peripheral wall.
  • the pinch rollers 10 with one of the inner rollers 6, i.e., to use one of the rollers 6 as a pinch roller.
  • a further possibility is to replace the ring of rollers 6 by a complete drum or winch rotatable about the axis of the table by a drive independent of that of the supporting rollers 7.
  • FIG. 6 is a vertical section, on one side of the axis, through a modified construction in which the rollers 6 carried on a spider 8 are replaced by a ring of rollers, of which one is visible at 6', on fixed axes.
  • This version also has the outer rollers 5 replaced by a fixed wall 11.
  • angular spaced skids 12 for example four, between the rollers 7, pivoted at their outer ends at points 13 near the periphery of the table and having their inner ends capable of being lifted by pneumatic rams 14.
  • skids 12 When the rams are energised a surface 15 on each skid lifts the inner-most turns of the coil off the rollers 7 and, because of the inclination of the sur faces 15, these turns are encouraged to expand radially.
  • the skids 12 are lifted before feed-in is resumed after a halt, and this helps in the expansion of the contracted turns to build up the reserve again.
  • the skids 12 could have rollers to reduce frictron.
  • a further possibility is to make either the inner or the outer ends of the main supporting rollers 7 adjustable in height, for example under the control of pneumatic rams, to alter the inclination of these rollers according to the state of the coil. This is indicated diagrammatically by the ram 14' shown in broken lines in FIG. 6.
  • FIG. 7 shows diagrammatically a modified form of feed-in, in which the pinch rollers 10' are mounted on the free end of an arm 16 which is pivoted about a vertical axis 17 outside the coil and can swing about this axis to deliver the incoming strip to the table at a smaller or larger radius, as required.
  • the feed-in rollers 3' are also mounted on this arm, near its pivotal axis.
  • the arm may be biased to swing outwards, for example by inclining its pivotal axis with respect to the vertical, or by applying external loading.
  • rollers at the free end of the arm may be arranged to impart a curvature to the strip as it leaves the arm and enters the coil 2.
  • the movement of the strip along the arm may be assisted by clamping the strip between two parallel moving belts running over rollers at the inner and outer ends of the arm.
  • a method of feeding strip material to a striputilizing machine while providing a variable'reserve to allow for intermittent interruptions of the feed-in and withdrawal of the strip while maintaining continuously without interruption the withdrawal and feed-in respectively comprising forming said strip into a single spiral coil having a fixed number of turns and having its axis vertical, feeding said strip onto the inside of said coil while withdrawing strip from the outside of said coil, defining the maximum and minimum radii which the turns of said coil are allowed to have, the difference between said radii being greater than the radial space occupied by the given number of turns of the coil when those turns are close-packed, and allowing the turns to contract successively, or expand successively, to provide a reserve represented by the difference between the expanded and contracted circumferential lengths of the turns that allows continued withdrawal in the absence of feed-in and continued feed-in in the absence of withdrawal, up to the limit of the number of turns present.
  • a strip accumulator for carrying out the method of claim 1 comprising a table for supporting a spiral coil of strip with its axis substantially vertical and provided with means for rotating the turns of the coil about said axis, feed-in means for guiding the incoming strip onto the inside of said coil and withdrawal means for with- I drawing strip from the outermost turn of said coil, means defining a maximum limit on the radius of the coil and means defining a minimum limit on the radius of the coil.
  • the strip accumulator set forth in claim 4 including movable means for raising the inner turns of said coil clear of said supporting rollers at will, and urging those turns radially outwards.
  • feed-in means comprise an arm capable of swinging movement about a vertical axis clear of said table and guide means on the free end of said arm.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Advancing Webs (AREA)
  • Winding Of Webs (AREA)
  • Winding, Rewinding, Material Storage Devices (AREA)
US317178A 1971-12-21 1972-12-21 Strip accumulator Expired - Lifetime US3860188A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5944671A GB1386250A (en) 1971-12-21 1971-12-21 Strip accumulator

Publications (1)

Publication Number Publication Date
US3860188A true US3860188A (en) 1975-01-14

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US317178A Expired - Lifetime US3860188A (en) 1971-12-21 1972-12-21 Strip accumulator

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US (1) US3860188A (de)
BE (1) BE792974A (de)
CA (1) CA972737A (de)
DE (1) DE2262148C2 (de)
FR (1) FR2170489A5 (de)
GB (1) GB1386250A (de)
IT (1) IT974196B (de)

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4160531A (en) * 1977-10-25 1979-07-10 Brammall, Inc. Apparatus and methods for untelescoping and rewinding reels of sheet material such as steel
US4473193A (en) * 1983-01-13 1984-09-25 Guild International Inc. Helical feed-in mechanism for strip accumulator
US4513490A (en) * 1980-06-25 1985-04-30 Tadeusz Sendzimir Intermediate accumulating system in processing strip material
US4529140A (en) * 1983-06-23 1985-07-16 Guild International Inc. Continuous strip accumulator
US4605178A (en) * 1983-10-04 1986-08-12 Hoesch Aktiengesellschaft Device for the compensating storage of packing band in packaging machines
US5193757A (en) * 1985-05-06 1993-03-16 Lev Talanker Automatic rolled convolution accumulator
US5575434A (en) * 1993-09-01 1996-11-19 Voest-Alpine Industrieanlagenbau Gmbh Strip accumulator
US5601250A (en) * 1996-01-24 1997-02-11 Guild International Inc. Strip accumulator
US5720444A (en) * 1996-01-24 1998-02-24 Guild International Inc. Strip accumulators
US20120097785A1 (en) * 2010-10-25 2012-04-26 Binner Sr Paul Alan Method for reducing web feed rate variations induced by parent roll geometry variations
US20120097787A1 (en) * 2010-10-25 2012-04-26 Binner Sr Paul Alan Alternative apparatus for reducing web feed rate variations induced by parent roll geometry variations
US20120097788A1 (en) * 2010-10-25 2012-04-26 Binner Sr Paul Alan Alternative apparatus for reducing web feed rate variations induced by parent roll geometry variations
US20120101626A1 (en) * 2010-10-25 2012-04-26 Binner Sr Paul Alan Alternative method for reducing web feed rate variations induced by parent roll geometry variations
US20120097786A1 (en) * 2010-10-25 2012-04-26 Binner Sr Paul Alan Apparatus for reducing web feed rate variations induced by parent roll geometry variations
US9434573B2 (en) 2010-10-25 2016-09-06 The Procter & Gamble Company Alternative method for reducing web feed rate variations induced by parent roll geometry variations
US9434572B2 (en) 2010-10-25 2016-09-06 The Procter & Gamble Company Alternative method for reducing web feed rate variations induced by parent roll geometry variations

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2849486C2 (de) * 1978-11-15 1984-04-26 Hoesch Werke Ag, 4600 Dortmund Verfahren und Vorrichtung zur Zwischenspeicherung von bandförmigen Materialien
US4762289A (en) * 1986-02-28 1988-08-09 Harland Machine Systems Limited Continuous supply of elongate material
DE3911036A1 (de) * 1989-04-05 1990-05-10 Wolfgang Hornig Verfahren und vorrichtung zur kontinuierlichen abrollung von bandringen
FR2699518B1 (fr) * 1992-12-22 1995-03-10 Kertscher Sa E Dispositif accumulateur de bandes et installation pour la transformation de bandes en continu, comportant un tel dispositif.
DE4302088C2 (de) * 1993-01-21 1997-04-10 Michael Dr Ing Graefe Horizontaler Spiralbandspeicher für Metallband

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2037601A (en) * 1932-03-03 1936-04-14 Shirlow Albert Edward Biograph film winding apparatus
US3218000A (en) * 1963-02-18 1965-11-16 Wilson Eng Co Inc Lee Strip handling apparatus
US3258212A (en) * 1963-11-18 1966-06-28 Armco Steel Corp Method and apparatus for accumulating metallic strip and the like
US3506210A (en) * 1967-10-20 1970-04-14 Armco Steel Corp Compact strip accumulator
US3628742A (en) * 1970-07-08 1971-12-21 Armco Steel Corp Drive system for strip accumulator

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE675581C (de) * 1936-12-06 1939-05-12 Eugen Seifried Dipl Ing Vorrichtung zum Wickeln endloser Baender, insbesondere Reklamebaender
DE1296470B (de) * 1966-08-23 1969-05-29 Sendzimir Tadeusz Waterbury Band-Speichervorrichtung
DE1924542C3 (de) * 1969-05-14 1980-06-26 Armco Steel Corp., Middletown, Ohio (V.St.A.) Vorrichtung zum Speichern von bandförmigem Material
DE1952732B2 (de) * 1969-10-20 1971-05-13 Grundig Emv Magnetbandkassette

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2037601A (en) * 1932-03-03 1936-04-14 Shirlow Albert Edward Biograph film winding apparatus
US3218000A (en) * 1963-02-18 1965-11-16 Wilson Eng Co Inc Lee Strip handling apparatus
US3258212A (en) * 1963-11-18 1966-06-28 Armco Steel Corp Method and apparatus for accumulating metallic strip and the like
US3506210A (en) * 1967-10-20 1970-04-14 Armco Steel Corp Compact strip accumulator
US3628742A (en) * 1970-07-08 1971-12-21 Armco Steel Corp Drive system for strip accumulator

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4160531A (en) * 1977-10-25 1979-07-10 Brammall, Inc. Apparatus and methods for untelescoping and rewinding reels of sheet material such as steel
US4513490A (en) * 1980-06-25 1985-04-30 Tadeusz Sendzimir Intermediate accumulating system in processing strip material
US4473193A (en) * 1983-01-13 1984-09-25 Guild International Inc. Helical feed-in mechanism for strip accumulator
US4529140A (en) * 1983-06-23 1985-07-16 Guild International Inc. Continuous strip accumulator
US4605178A (en) * 1983-10-04 1986-08-12 Hoesch Aktiengesellschaft Device for the compensating storage of packing band in packaging machines
US5193757A (en) * 1985-05-06 1993-03-16 Lev Talanker Automatic rolled convolution accumulator
US5575434A (en) * 1993-09-01 1996-11-19 Voest-Alpine Industrieanlagenbau Gmbh Strip accumulator
US5601250A (en) * 1996-01-24 1997-02-11 Guild International Inc. Strip accumulator
US5720444A (en) * 1996-01-24 1998-02-24 Guild International Inc. Strip accumulators
US20120097787A1 (en) * 2010-10-25 2012-04-26 Binner Sr Paul Alan Alternative apparatus for reducing web feed rate variations induced by parent roll geometry variations
US20120097785A1 (en) * 2010-10-25 2012-04-26 Binner Sr Paul Alan Method for reducing web feed rate variations induced by parent roll geometry variations
US20120097788A1 (en) * 2010-10-25 2012-04-26 Binner Sr Paul Alan Alternative apparatus for reducing web feed rate variations induced by parent roll geometry variations
US20120101626A1 (en) * 2010-10-25 2012-04-26 Binner Sr Paul Alan Alternative method for reducing web feed rate variations induced by parent roll geometry variations
US20120097786A1 (en) * 2010-10-25 2012-04-26 Binner Sr Paul Alan Apparatus for reducing web feed rate variations induced by parent roll geometry variations
US8733685B2 (en) * 2010-10-25 2014-05-27 The Procter & Gamble Company Apparatus for reducing web feed rate variations induced by parent roll geometry variations
US8733687B2 (en) * 2010-10-25 2014-05-27 The Procter & Gamble Company Alternative apparatus for reducing web feed rate variations induced by parent roll geometry variations
US8733686B2 (en) * 2010-10-25 2014-05-27 The Procter & Gamble Company Alternative apparatus for reducing web feed rate variations induced by parent roll geometry variations
US8740130B2 (en) * 2010-10-25 2014-06-03 The Procter & Gamble Company Alternative method for reducing web feed rate variations induced by parent roll geometry variations
US8757535B2 (en) * 2010-10-25 2014-06-24 The Procter & Gamble Company Method for reducing web feed rate variations induced by parent roll geometry variations
US9434573B2 (en) 2010-10-25 2016-09-06 The Procter & Gamble Company Alternative method for reducing web feed rate variations induced by parent roll geometry variations
US9434572B2 (en) 2010-10-25 2016-09-06 The Procter & Gamble Company Alternative method for reducing web feed rate variations induced by parent roll geometry variations

Also Published As

Publication number Publication date
DE2262148C2 (de) 1983-01-13
DE2262148A1 (de) 1973-07-05
CA972737A (en) 1975-08-12
FR2170489A5 (de) 1973-09-14
IT974196B (it) 1974-06-20
GB1386250A (en) 1975-03-05
BE792974A (fr) 1973-04-16

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