US3442108A - Metal-handling method and apparatus - Google Patents

Metal-handling method and apparatus Download PDF

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Publication number
US3442108A
US3442108A US521897A US52189766A US3442108A US 3442108 A US3442108 A US 3442108A US 521897 A US521897 A US 521897A US 52189766 A US52189766 A US 52189766A US 3442108 A US3442108 A US 3442108A
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United States
Prior art keywords
strip
roller
coil
uncoiling
point
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Expired - Lifetime
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US521897A
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English (en)
Inventor
Friedrich Muller
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.)
SUNDWIGER EISENHUTTE MAS FAB G
Sundwiger Eisenhutte Mas Fab Grah & Co
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SUNDWIGER EISENHUTTE MAS FAB G
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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 OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C47/00—Winding-up, coiling or winding-off metal wire, metal band or other flexible metal material characterised by features relevant to metal processing only
    • B21C47/34—Feeding or guiding devices not specially adapted to a particular type of apparatus

Definitions

  • METAL-HANDLING METHOD AND APPARATUS Filed Jan. 20, 1966 Sheet 4 of 4 Inventor: Frledric? MMLQX 3 Ar Qtcovnegs United States Patent 3,442,108 METAL-HANDLING METHOD AND APPARATUS Friedrich Miiller, Hemer, Germany, assignor to Sundwiger Eisenhutte Maschinenfabrik Grah & Co., Homer-Sundwig, Germany Filed Jan. 20, 1966, Ser. No. 521,897 Claims priority, application Germany, Mar. 23, 1965, S 96,130 Int. Cl. B21d 1/02, 3/02 US. Cl. 72-164 14 Claims ABSTRACT OF THE DISCLOSURE
  • the present invention relates to a method and apparatus for handling coiled metal strips, and particularly to a method and apparatus for preventing the appearance of breaks when uncoiling them.
  • coil breaks often occur.
  • the coil breaks which are generally in the form of kinks or creases, are oriented transversely to the coiling direction of the strip, appear with varying intensity on the strip and are disposed at various distances therealong. Such breaks are obviously undesirable in that they often constitute a major hindrance to further utiization and processing of the strip.
  • a further object of the present invention is to simplify the uncoiling of metal strips.
  • an apparatus for carrying out the above-described method.
  • This apparatus is basically composed of support pressure applyirg means for continuously contacting the strip at approximately the point where it leaves the coil during the entire uncoiling operation, and uncoiling means for deflecting the strip after it: leaves the roller, these uncoiling means being mounted in such a way that a line between the point where the uncoiling means contacts the strip and the point of contact of the pressure applying means against the strip forms an angle with the tangent to the coil strip at the point of contact which remains substantially constant during the uncoiling of the entire strip.
  • Both the support pressure applying means and the uncoiling means are preferably constituted by rollers.
  • FIGURE 1 is a schematic side view of one embodiment of the apparatus of the present invention.
  • FIGURE 2 is a view simiar to that of FIGURE 1 showing another embodiment of the apparatus of the present invention
  • FIGURES 3 to 8 are pictorial diagrams used in explaining the operation of the apparatus of the present invention.
  • This hydraulic unit is not illustrated inasmuch as it can be constituted by any wellknown, commercially available hydraulic assembly, such as a hydraulic jack.
  • the roller 4 is mounted on a shaft 7 which is connected to one end of a rocker arm 8.
  • the other end of the rocker arm 8 is mounted, through the intermediary of a cross-head guide 11, to be pivotable about the axis of a shaft 9 carrying a supporting roller 10.
  • the shaft 9 is mounted in a stationary support, as is the shaft of drum 1.
  • the rocker arm 8 is also capable of longitudinal move ment with respect to the guide 11.
  • a lever 12 is pivotably mounted at an intermediate point on the rocker arm 8, the lever 12 being lockable with respect to the rocker arm.
  • This lever 12 carries at its free end an uncoiling roller 13 which constitutes the uncoiling means for the device and which acts to aid the uncoiling of the metal strip 3 as it passes from the coil 2 to the supporting roller 10.
  • An additional guide roller 14 for guiding the strip 3 during the uncoilng operation is also supported by rocker arm 8.
  • the uncoiling devices illustrated operate to first bend the strip 3 taken off the coil 2 in such a way as to cause a permanent deformation of the strip and to then bend the strip back in the other direction by an amount which prevents the strip from exceeding its elastic limit, i.e., which prevents the strip from undergoing a further permanent deformation.
  • the first-mentioned bending of the strip produces a permanent deformation which is equal to the difference between the original curvature of the strip when coiled on the drum 1 and the desired final curvature of the uncoiled strip, with allowance being made for acceptable small bending deviations in both directions in the plane of the bending operation.
  • the first bending of the strip which causes the desired permanent deformation, is elfectuated by the combined action on strip 3 of rollers 4 and 13.
  • the pressure roller 4 is mounted so as to press continually against the outer periphery of the coil 2 during the entire uncoiling operation. Since the diameter of the coil 2 will decrease prw gresively during the uncoiling operation, a relative movement must take place between roller 4 and drum 1 sub- Stantially in the direction of a line joining the axes of rotation of these two members. This is accomplished, in the embodiment of FIGURE 1, by permitting the support 6 for the roller 4 to slide in the cross-head guide in the direction of the double arrows and in the embodiment of FIGURE 2, by permitting the drum 1 to slide freely in the direction of the double arrows.
  • the pressure roller 4 thus maintains a constant pressure against the strip portion being uncoiled so as to cause the strip to leave the coil 2 in a direction which is substantially tangential to the coil surface.
  • the strip 3 then passes over the uncoiling roller 13, the bending undergone by the strip when passing from roller 4 to roller 13 determining the amount of permanent deformation which will result. To this end, it is necessary, for any given strip material that the position or roller 13 bears a certain relationship to the point of contact between roller 4 and coil 2 and the common tangent plane betwen roller 4 and coil 2. The factors determining this relationship will be discussed in detail below.
  • the strip 3 After having been given the desired curvature by passage between rollers 4 and 13, the strip 3 is bent back by guide roller 14 by an amount which prevents the strip from exceeding its elastic limit. The strip then passes over a second guide roller and is delivered to subsequent stations for carrying out various fabrication processes.
  • the uncoiling roller 13 is mounted so that its position with respect to roller 4 and coil 2 can be readily adjusted. Once this position is adjusted for any given strip and any desired curvature, it is necessary that the relative position of roller 13 with respect to roller 4 and coil 2 remains constant during the entire coiling operation, during which the diameter of coil 2 will gradually decrease.
  • the roller 13 is mounted on a cross arm 8 having one end connected to the shaft 7 of roller 4 and having its other end slidably disposed in a cross-head guide 11 which is itself pivotably mounted on the shaft 9 of roller 10.
  • This arrangement permits cross arm 8 to slide freely in guide 11 and to pivot about the axis of shaft 9 in such a way as to permit roller 4 to move in the direction of the double arrows of FIGURE 1 and to remain constantly in contact with the coil 2 as its diameter decreases, while the roller 13 is also displaced by the movement of cross arm 8. Since roller 4 moves toward the axis of rotation of drum 1, the point of contact between roller 4 and coil 2 will always remain on a line joining the axes of rotation of these two members. Furthermore, during any given uncoiling operation, the distance between the axes of rotation of rollers 4 and 13 will remain constant.
  • All of the various rotating elements of these embodiments are preferably connected to be driven by suitable motors or by a single motor connected to a suitable multiple drive arrangement.
  • FIGURES 3 to 8 show, in pictorial form, various relative positions of the pressure roller 4 and the uncoiling roller 13 for producing various types of curvatures.
  • FIGURES 3, 5 and 7 show the condition existing at the start of the uncoiling operation, while FIGURES 4, 6 and 8 show the corresponding condition existing near the end of the uncoiling operation, when the drum 1 is almost empty.
  • the strip 3 is only subjected to the action of rollers 4 and .13, it being assumed that the guide roller 14 is not present.
  • FIGURES 3, 5 and 7 show the distance A between the point of tangency of strip 3 on roller 13 and the point of contact between roller 4 and coil 2 and the displacement f between the point of tangency on roller 13 and a corresponding point on a path 3 having a curvature equal to the desired final curvature of strip 3.
  • FIGURES 3 and 4 there is shown the relative position between roller 13 and roller 4 and coil 2 for giving the strip 3 a straight-line configuration, as shown by the dot-dash line 3'.
  • FIGURES 5 and 6 show an arrangement for giving the strip a large radius of curvature, as shown by line 3', which is larger than, and in the same direction as, the radius of curvature of the strip prior to uncoiling.
  • FIGURES 7 and 8 show an arrangement for giving the strip 3 the form represented by the dot-dash line 3', in which the strip has a relatively large radius of curvature which is in the opposite direction from the radius of curvature of the coil 2.
  • the radius of curvature of the uncoiled strip 3 can be varied over a wide range by varying the displacement of the point of tangency of the strip on the roller 13- from the common tangent plane T of roller 4 and coil 2.
  • this displacement need not be determined by calculation, but rather by estimation because the final curvature of the strip need not normally be precise. It is only necessary, in order to avoid the creation of coil breaks, i.e., kinks or folds transverse to the length of the strip, that the curvature produced by the bending operation be approximately equal to the desired final curvature so that, after the strip has left roller 13, any further deformation thereof wll not cause the proportional limit, or elastic limit, of the strip to be exceeded.
  • the position of the various adjustable rollers can be controlled in any known manual, mechanical, hydraulic, pneumatic, or electrical manner. Furthermore, the beginning of the uncoiling operation can be facilitated by moving the uncoiling roller rapidly away from the pressure roller to assist feeding the strip 3 over roller 13, for the device of FIGURE 1, or under this roller, for the device of FIGURE 2.
  • the present invention provides a novel arrangement for avoiding the formation of kinks or folds during the uncoiling of a coiled strip wherein the distance between the points at which the strip is supported while it is being deformed is smaller than the theoretical spacing between these kinks or folds, which are known as coil breaks.
  • the novel method and apparatus of the present invention permit a complete elimination of such coil breaks, a result which was not obtainable with any of the prior art methods or apparatus.
  • a method for preventing the occurrence of coil breaks while uncoiling an annularly coiled strip comprising the steps of:
  • deflecting of the strip is carried out by applying a force to the strip at a point whose distance from the point at which the supporting pressure is applied is less than the theoretical spacing between coil breaks.
  • An arrangement as defined in claim 4 further comprising: a cross-head guide supporting said pressure roller for permitting said pressure roller to move transversely to the surface of the coil; a rocker arm having one end connected to said pressure roller and having its other end mounted to pivot about a stationary axis and to permit said arm to move in a longitudinal direction; and a lever having one end pivota'bly connected to said rocker arm and its other end supporting said uncoiling roller.
  • An arrangement as defined in claim 4 further comprising a guide roller for guiding the strip after it leaves said uncoiling roller.
  • An apparatus for preventing the occurrence of coil breaks while uncoiling an annularly coiled strip comprising:
  • a method as defined in claim 1 comprising the sub- 8 sequent step of deflecting the strip back in a direction which is opposite to the uncoiling direction by an amount which is within the elastic limit of the strip.
  • An arrangement as defined in claim 12 further comprising means deflecting the strip back in a direction which is opposite to the uncoiling direction by an amount which is within the elastic limit of the strip.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Winding, Rewinding, Material Storage Devices (AREA)
US521897A 1965-03-23 1966-01-20 Metal-handling method and apparatus Expired - Lifetime US3442108A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DES96130A DE1279604B (de) 1965-03-23 1965-03-23 Verfahren zur Vermeidung von Wickelbruechen beim Ablaufen von zu ringfoermigen Bunden gewickeltem Metallband und Vorrichtung zur Durchfuehrung des Verfahrens

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US3442108A true US3442108A (en) 1969-05-06

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US521897A Expired - Lifetime US3442108A (en) 1965-03-23 1966-01-20 Metal-handling method and apparatus

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US (1) US3442108A (ro)
AT (1) AT269789B (ro)
BE (1) BE669557A (ro)
DE (1) DE1279604B (ro)
FR (1) FR1443430A (ro)
NL (1) NL148814B (ro)
SE (1) SE317940B (ro)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3712100A (en) * 1970-01-26 1973-01-23 Flour Ocean Services Inc Method and system for laying a pipeline from a reel barge
US3779138A (en) * 1971-03-10 1973-12-18 Masson Scott Thrissell Eng Ltd Curl corrector apparatus for operating on a continuous web
US3834204A (en) * 1972-06-10 1974-09-10 Ungerer Irma Machine for wrap forming metal strip as it is uncoiled
EP0167036A2 (en) * 1984-07-02 1986-01-08 Mcdermott Incorporated Reel type continuous marine pipe laying system
DE3831944A1 (de) * 1988-09-20 1990-04-05 Siemens Ag Vorrichtung zum ueberdehnungsfreien abwickeln von duennen baendern
US5348459A (en) * 1991-07-05 1994-09-20 Societe Joseph Sauron Materiel Industriel Portable device for straightening out tubes
US5676009A (en) * 1995-11-06 1997-10-14 Chevron U.S.A., Inc. Pipe straightener and rerounder device
DE19852978A1 (de) * 1998-11-17 2000-05-18 Voith Sulzer Papiertech Patent Druckmaschinenanordnung
US6419424B1 (en) 1998-11-11 2002-07-16 Null's Machine & Mfg., Inc. Coil pipe trailer
US6691544B2 (en) * 2001-08-10 2004-02-17 U.S. Properties, Inc. Method and apparatus to uncoil and dekink coiled material
US20120103047A1 (en) * 2010-01-29 2012-05-03 Jp Steel Plantech Co. Roller leveler

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2087010A (en) * 1934-06-26 1937-07-13 Mckay Machine Co Method and apparatus for preventing coil breaks in sheet metal
US3079976A (en) * 1959-09-08 1963-03-05 Production Machinery Corp Coil processing mechanism

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE693163C (de) * 1937-06-10 1940-07-03 Mckay Machine Company Vorrichtung zum Abrollen von in heissem Walzzustande zu einem Wickelbund aufgerollten Blechen
GB1077422A (en) * 1964-02-25 1967-07-26 Nippon Paint Co Ltd An improved pigment dispersion for water thinnable paints
DE1900864U (de) * 1964-06-15 1964-09-17 Driam S A Vorrichtung zum abwickeln drehbar gelagerter metallbandringe.

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2087010A (en) * 1934-06-26 1937-07-13 Mckay Machine Co Method and apparatus for preventing coil breaks in sheet metal
US3079976A (en) * 1959-09-08 1963-03-05 Production Machinery Corp Coil processing mechanism

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3712100A (en) * 1970-01-26 1973-01-23 Flour Ocean Services Inc Method and system for laying a pipeline from a reel barge
US3779138A (en) * 1971-03-10 1973-12-18 Masson Scott Thrissell Eng Ltd Curl corrector apparatus for operating on a continuous web
US3834204A (en) * 1972-06-10 1974-09-10 Ungerer Irma Machine for wrap forming metal strip as it is uncoiled
EP0167036A2 (en) * 1984-07-02 1986-01-08 Mcdermott Incorporated Reel type continuous marine pipe laying system
US4594871A (en) * 1984-07-02 1986-06-17 Mcdermott, Inc. Reel type continuous marine pipe laying system
EP0167036A3 (en) * 1984-07-02 1987-04-01 Mcdermott Incorporated Reel type continuous marine pipe laying system
AP62A (en) * 1984-07-02 1989-12-05 Mcdermott Inc A Delaware Corp Reel type continuous marine pipe laying system.
DE3831944A1 (de) * 1988-09-20 1990-04-05 Siemens Ag Vorrichtung zum ueberdehnungsfreien abwickeln von duennen baendern
US5348459A (en) * 1991-07-05 1994-09-20 Societe Joseph Sauron Materiel Industriel Portable device for straightening out tubes
US5676009A (en) * 1995-11-06 1997-10-14 Chevron U.S.A., Inc. Pipe straightener and rerounder device
US6419424B1 (en) 1998-11-11 2002-07-16 Null's Machine & Mfg., Inc. Coil pipe trailer
DE19852978A1 (de) * 1998-11-17 2000-05-18 Voith Sulzer Papiertech Patent Druckmaschinenanordnung
DE19852978C2 (de) * 1998-11-17 2002-01-24 Voith Paper Patent Gmbh Druckmaschinenanordnung
US6691544B2 (en) * 2001-08-10 2004-02-17 U.S. Properties, Inc. Method and apparatus to uncoil and dekink coiled material
US20120103047A1 (en) * 2010-01-29 2012-05-03 Jp Steel Plantech Co. Roller leveler
US9248486B2 (en) 2010-01-29 2016-02-02 Jp Steel Plantech Co. Roller leveler

Also Published As

Publication number Publication date
SE317940B (ro) 1969-12-01
NL148814B (nl) 1976-03-15
NL6511880A (ro) 1966-09-26
BE669557A (ro) 1965-12-31
FR1443430A (fr) 1966-06-24
AT269789B (de) 1969-04-10
DE1279604B (de) 1968-10-10

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