US3729144A - Design of rotary strip accumulator - Google Patents

Design of rotary strip accumulator Download PDF

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Publication number
US3729144A
US3729144A US00169192A US3729144DA US3729144A US 3729144 A US3729144 A US 3729144A US 00169192 A US00169192 A US 00169192A US 3729144D A US3729144D A US 3729144DA US 3729144 A US3729144 A US 3729144A
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United States
Prior art keywords
strip
rollers
cage
convolutions
accumulating device
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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
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US00169192A
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English (en)
Inventor
T Bijasiewicz
R Somerhalder
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Wean United Inc
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Wean United Inc
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Publication date
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS 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
    • 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
    • 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

  • the disclosure relates to avdevice for accumulating a continuous coil of strip, such as, carbon steel.
  • the device comprises a support upon which the strip material is accumulated by being coiled into two substantially concentric sets of convolutions--an outer set and an inner set-connected by a free reverse loop which orbits between the sets of convolutions.
  • the sets of convolutions are distinguished not only by their relative concentric positions, but by their reversed winding which results in the existence of a numerical balance between the convolutions of the respective sets during periods of strip input and/or output from the device. Accordingly, the rate of change in the number of convolutions in each set is the same; their number increasing as the quantity of the accumulated strip increases and decreasing as the quantity decreases.
  • the sets of convolutions are formed against two expansible roller cages which support and guide the strip.
  • the rollers of the cages are provided with interrelated bearing chock assemblies to which are connected mechanical jacks for radially displacing the cages independently.
  • At least some of the rollers of the outer cage are driven by a gear-motor unit directly supportable by the journals of the rollers.
  • the diameters of the rollers of the outer cage are considerably larger than the diameters of the rollers of the inner cage and several of the former are considerably shorter in body length for strip guiding purposes.
  • the present invention relates to a strip accumulating device of the type illustrated in U. S. Pats. Nos. 3,258,212, 3,341,139 and 3,506,210. Particular attention is directed to the last-mentioned patent which contains a description of the general background of strip accumulators and also of the basic operating principle and construction of an accumulator of the type to which the present invention applies.
  • the present invention represents, in part, construction improvements to the strip accumulator illustrated in U. S. Pat. No. 3,506,210.
  • strip accumulators of the type illustrated in the aforesaid patent were attempted to be utilized for accumulating wide strip and heavy coils with a wide range of thickness and widths, considerable difficulty was experienced. This was due, principally, to the magnitude of the forces involved and the physical size of the inner and outer sets of convolutions.
  • These problems were greatly intensified by the multiplying of interacting motions which had to be executed simultaneously by various elements of the accumulator, while still being confined to a relatively small space in order to realize the full advantage of the accumulator disclosed in the aforesaid U. S. Pat. No. 3,506,210.
  • the present invention provides in a strip accumulating device of the type generally disclosed and described in the aforesaid U. S. Pat. No. 3,506,210, that the outer cage rollers be made considerably larger than the inner cage rollers and of narrower roll bodies, and wherein the inner rolls are rotatably received by slotted bearing chock assemblies similar to the slots formed in the frame of the accumulator and through which slots the journals of the rollers of the outer cage extend.
  • a further object of the present invention is to provide a motor unit mounted on one or both ends of the rollers of the outer cage for driving these rollers, and wherein the rollers of both cages are radially adjusted by separate jacks carried by the frame, which jacks are driven in a manner to provide separate end adjustments of the rollers of the two cages.
  • FIG. 1 is a sectional view taken on lines 1 l of FIG. 2 of a strip accumulating device incorporating the features of the present invention
  • FIG. 2 is a plan view of the strip accumulating device illustrated in FIG. 1;
  • FIG. 3 is a partial plan view of the drive for the mechanical jacks associated-with the inner and outer cages illustrated in FIG. 1',
  • FIG. 4 is a sectional view taken on lines 4 4 of FIG. 1;
  • FIG. 5 is a sectional view taken on lines 5 5 of FIG. 4;
  • FIG. 6 is a sectional view taken on lines 6 6 of FIG. 7;
  • FIG. 7 is a sectional view taken on lines 7 7 of FIG. 6; 1
  • FIG. 8 is an end view,-partially in section, of the outer cage rollers illustrated in FIG. 1;
  • FIG. 9 is a plan view of two of the lowermost rolls illustrated in FIG. 8 showing the drive for these rolls.
  • the strip accumulator receives the leading end of a strip to be stored from a supporting device, such as a pinch roll, which also serves as a feeding device for the strip.
  • Strip is fed to and between the inner and outer cages of the device and passed around a suitable inclined payoff roll which shifts the strip sideways so that it can be taken out from where it is fed to a delivery pinch roll or other tensioning means.
  • the inner annular roller cage is positioned centrally with respect to the position the strip assumes as it is fed to the accumulating device; whereas, the outer annular roller cage surrounds the inner roller cage and lies in a spaced relationship thereto.
  • the pinch roll feeds the strip into contact with the inner face of the outer roller cage, which cage is adapted to build up an outer set of convolutions; whereas, the inner cage is adapted to build up an inner set of convolutions.
  • These two sets of convolutions lie in a spaced relationship to each other with the outermost convolutions of the inner set connected to the innermost convolutions of the outer set by a reverse loop formed by the strip which is freely movable in the space between the set of convolutions.
  • the delivery pinch roll is adapted to withdraw strip from the inside of the inner set of convolutions around the inner roller cage and payoff roll.
  • the entry pinch roll is driven independently of the delivery pinch roll at a variable rate of speed and the rate of speed at which the strip is withdrawn from the inner roller cage, so that the number of convolutions in both the inner and outer set of convolutions will be increased when the lineal rate of input strip speed exceeds the lineal rate of strip withdrawn and decreased when the lineal rate of strip input is less than the lineal rate of strip withdrawal.
  • FIGS. 1 and 2 of the present invention relate to certain mechanical improvements over the basic machine illustrated in the aforesaid patent, and reference in this connection is made to FIGS. 1 and 2 of the present invention.
  • FIG. 1 particularly, there is provided a pair of spaced-apart upright frames, one of which is shown in FIG. 1 as 11, that receive and movably support radial equidistant rollers 13 that make up the outer cage of rollers.
  • the frame also indirectly supports rollers 15, also radially equispaced, that make up the inner cage of the strip accumulating device.
  • rollers 13 of the outer cage are equally spaced with respect to each other and are adapted to move in a radial direction towards the rollers 15 of the inner cage as the rollers 15 of the inner cage are adapted to move in common planes towards and away from the rollers 13 of the outer cage.
  • a roller 13 and a roller 15 that fall in the same radial plane make up a cooperative set and their inter-relationship will be pointed out more clearly hereinafter in addition to describing the driving means for the various rollers.
  • FIG. 2 there is better illustrated the spaced-apart construction of the two upright frames 11 along with illustrating the extent of movement of two of the rollers 13 of the outer cage, which are shown in phantom in their extreme outward position and in full line in their extreme inward position.
  • FIG. 2 also shows, in part, the take-out spool 17 which is employed to support and convey the innermost convolution of the inner set of convolutions from the interior of the strip accumulating device in a spiral path to the outside of the device and, hence, to a delivery pinch roll which is shown diagrammatically at 19.
  • FIG. 1 the take-out spool 17 which is employed to support and convey the innermost convolution of the inner set of convolutions from the interior of the strip accumulating device in a spiral path to the outside of the device and, hence, to a delivery pinch roll which is shown diagrammatically at 19.
  • a feeding unit 21 in the form of a pinch roll unit having an upper roll 22 and a lower roll 23 between which the strip is fed.
  • the rolls 22 and 23 are driven by a means, not shown, to urge the strip into a feed box or trough 25, which in FIG. 1 is shown in full line in a horizontal position, but which is adapted to assume an angular position as shown in the partial phantom position of the far end of the trough 25.
  • the end of the trough 25 is carried by the uppermost rollers 13 of the outer cage and is movable with this roller as the roll moves radially relative to the center of the accumulating device.
  • the entire pinch roll unit 21 is adapted to be raised and lowered on a support 27 by means of a motor and jack unit 29.
  • the trough 25 can be caused to always assume the horizontal position shown in FIG. 1 as it moves with the associated roller 13 of the outer cage.
  • the horizontal position may be desirable; whereas, on others, the inclined position of the feeder box 25 may be sufficient to properly guide the leading end of the strip between the two cages.
  • FIGS. 4, 5, 6 and 7 illustrate the interrelationship of each set of rollers 13 and 15 of the inner and outer cages.
  • two of these rollers arranged in the same radial plane constitute a cooperative pair, in which it will be noted in the aforesaid figures that, inward of the upright frames 11, rollers 15 of the inner cage are adapted to be received at their opposite ends in bearing chock assemblies 31, only one end of which is shown in these drawings, it being understood that the opposite end construction at the other end is the same.
  • Each bearing chock assembly 31 has a longitudinal slot 33 and, as shown in FIG. 5, is received in opposed U- shaped guides 33a of the frame 11.
  • ajournal 35 is provided with a bearing chock assembly 37 which rotatably supports the roller 13 and which is guided in the frames 11 similar to the chock assemblies 31. It will be appreciated that the length of the slots 33 and 34 of the bearing assembly 31 and frame, respectively, are formed long enough to allow the maximum adjustment and displacement of the rollers 13 and 15 of the inner and outer cages.
  • a gear motor unit 39 which is mounted directly on the journal 35 and which furnishes the torque to drive the rollers 13, at least with respect to the rollers other than the lowermost rollers, the drive of which will be described later.
  • the weight of the rollers 13 and 15, together with their bearing chock assemblies and, with respect to the rollers 13, their motor drive unit 39, are supported by the frames 11 through the agency of, in the case of the rollers 15, rods 41 and, in the case of the rollers 13, rods 42, which rods are part of the jack assemblies 43 and 44, respectively; the housings of which are supported directly by the frames 11.
  • the frames around their perimeters are joined by a circular plate 11a which serves as the support base for the jacks 43 and 44. It will be noted in FIG.
  • FIG. 6 that at the ends of each of the rods 41 and 42 of the jack assemblies 43 and 44 there is provided a turnbuckle assembly 46 and 47 through which means the proper leveling of the ends of the rollers 13 and 15 can be secured.
  • FIG. 6 it will be noted that there is illustrated in phantom the uppermost position of the rollers 13 with respect to its journal 35 and its motor gear unit 39 which is carried on the journal.
  • FIG. 6 also illustrates, as does FIG. 7, one of the several separators 49 that run between the two upright frames 11 and tie them together.
  • the outer and inner cages are adapted to be adjusted relative to each other in which the rollers of each cage move simultaneously in equal amounts and for which purpose the jacks 43 or 44 of each cage are interconnected, as shown in FIG. 7, through universal spindles 52 which also appear in a more composite view in FIG. 1. While these drawings do not illustrate the universal spindle for the jacks 44, it will be appreciated that these jacks which service the rollers 13 of the outer cage are also provided with such spindles.
  • FIG. 3 actually illustrates the spindles for both of the jacks 43 and 44 in which the spindles for the jack 43 are identified as 52a,
  • each separate series of jacks 43 and 44 there are provided separate electrical motors 54 and 55, respectively.
  • the network of the jacks, spindles and motors mounted on the outside of the frames 11 make a circular path around the entire accumulating device.
  • a special drive is provided for the lower five rollers 13 of the outer cage. 4
  • each roller has its own electrical motor 61 in which the drive assemblies are mounted on the opposite side of the strip with respect to the location of the delivery pinch roll 19.
  • the present invention provides for the elimination of any expensive and cumbersome mechanism for guiding the free loop between the inner and outer cages. Instead, it provides that the rollers l3 of the outer cage be made of considerably larger diameter than the rollers 15 of the inner cage.
  • the extent of the diameters of the rollers 13 is such that, when in their innermost positions, they are brought as closely together as possible without touching each other, as illustrated in FIG. 7. in this manner the gaps between the outer cage rollers are reduced to a very minimum and, since both the strip and the periphery of the rollers move at the same speed, the bulging free transfer loop will ride on more or less a wavy, but continuously moving surface, which will greatly reduce any danger of cobbling.
  • the size of the gaps between the outer cage rollers at the end of the cycle when the free loop reverses its rotation depends mainly on the strip thickness as does the free loop diameter. Because of this, the larger the gaps, the larger the free loop diameter. This means that the free loop diameter to roller gap ratio, which determined the capabilities of guiding the free loop at the end of the cycle, remains substantially constant throughout the whole range of strip thicknesses.
  • the present invention provides an improved manner of guiding the edges of the strip, as illustrated best in FIGS. 2 and 7.
  • a triangular shaped guide 65 which is adapted to be adjusted transversely of the two upright frames 11 by a motor driven jack screw 66, the guides having on either side of the jack screw guide rods 67, as shown in FIG. 2.
  • the two opposed jack screws are mechanically tied together to synchronize their motions.
  • an inner annular roller cage composed of a plurality of freely rotatable guide rollers
  • said outer roller cage comprising a plurality of freely rotatable guide rollers
  • feed means positioned to feed strip into contact with the inner surface of said outer roller cage
  • said outer roller cage being adapted to build up an outer set of convolutions and said inner roller cage being adapted to build up an inner set of convolutions; the inner and outer sets of convolutions lying in spaced relation to each other with the outermost convolution ofthe inner set connected to the innermost convolution of the outer set by a reverse loop of said strip which is freely movable in the 'space between said sets of convolutions,
  • strip delivery means mounted to withdraw strip from the inside of the inner set of convolutions around said inner roller cage
  • the improvement comprising an upright frame for supporting said rollers of said inner and outer cages,
  • said means for mounting said guide rollers including bearing chock assemblies mounted on the opposite ends of said inner cage rollers and inside said frame,
  • each bearing chock assembly radially outward of said rollers of said inner cage, radial slots formed in said frame equal in number to said first slots and arranged in planes containing said first slots in which one each of said first and second slots form a set,
  • said means for mounting said guide rollers also including bearing chock assemblies arranged on the outside of said frame on the opposite ends of the outer cage rollers, and
  • said means for radially moving said guide rollers includes separate mechanical jacks connected to each bearing chock assembly,
  • said feed means includes a pinch roll unit and a feed box for guiding a strip from said pinch roll unit to said inner and outer cages, and

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Winding, Rewinding, Material Storage Devices (AREA)
  • Advancing Webs (AREA)
US00169192A 1971-08-05 1971-08-05 Design of rotary strip accumulator Expired - Lifetime US3729144A (en)

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US (1) US3729144A (https=)
JP (1) JPS4834753A (https=)
CA (1) CA961315A (https=)
DE (1) DE2238231A1 (https=)
FR (1) FR2149866A5 (https=)
GB (1) GB1357487A (https=)
ZA (1) ZA725242B (https=)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3806056A (en) * 1972-07-17 1974-04-23 Armco Steel Corp Spiral strip accumulator and method
US3836088A (en) * 1972-09-08 1974-09-17 Wean United Inc Strip accumulator
US3868065A (en) * 1972-09-20 1975-02-25 Wlodzimierz W Maruszczak Rotary strip accumulator
US4288042A (en) * 1979-09-11 1981-09-08 Tadeusz Sendzimir Variable capacity strip accumulator rotatable on a horizontal axis
US4410121A (en) * 1981-08-28 1983-10-18 Guild International Inc. Spiral coil strip accumulator and method
US4497452A (en) * 1982-09-22 1985-02-05 Tadeusz Sendzimir Twin coil strip accumulator
US5529257A (en) * 1995-03-16 1996-06-25 Abbey Etna Machine Company Strip accumulator
CN111826781A (zh) * 2020-07-25 2020-10-27 雷雨甜 一种自动化棉纱纺织机

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2280450A1 (fr) * 1974-08-02 1976-02-27 Comec Const Meca Creil Accumulateur spiral pour bande metallique flexible
JPS60141331A (ja) * 1983-12-29 1985-07-26 Kyodo Giken:Kk プレス一次加工用コイル材送給装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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 (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3806056A (en) * 1972-07-17 1974-04-23 Armco Steel Corp Spiral strip accumulator and method
US3836088A (en) * 1972-09-08 1974-09-17 Wean United Inc Strip accumulator
US3868065A (en) * 1972-09-20 1975-02-25 Wlodzimierz W Maruszczak Rotary strip accumulator
US4288042A (en) * 1979-09-11 1981-09-08 Tadeusz Sendzimir Variable capacity strip accumulator rotatable on a horizontal axis
US4410121A (en) * 1981-08-28 1983-10-18 Guild International Inc. Spiral coil strip accumulator and method
US4497452A (en) * 1982-09-22 1985-02-05 Tadeusz Sendzimir Twin coil strip accumulator
US5529257A (en) * 1995-03-16 1996-06-25 Abbey Etna Machine Company Strip accumulator
CN111826781A (zh) * 2020-07-25 2020-10-27 雷雨甜 一种自动化棉纱纺织机

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Publication number Publication date
ZA725242B (en) 1973-04-25
JPS4834753A (https=) 1973-05-22
CA961315A (en) 1975-01-21
GB1357487A (en) 1974-06-19
FR2149866A5 (https=) 1973-03-30
DE2238231A1 (de) 1973-02-15

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Free format text: SECURITY INTEREST;ASSIGNOR:WEAN UNITED, INC., A CORP.OF OH;REEL/FRAME:004458/0765

Effective date: 19850610

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