US3380686A - Apparatus for winding electrically conducting metal strips - Google Patents
Apparatus for winding electrically conducting metal strips Download PDFInfo
- Publication number
- US3380686A US3380686A US559834A US55983466A US3380686A US 3380686 A US3380686 A US 3380686A US 559834 A US559834 A US 559834A US 55983466 A US55983466 A US 55983466A US 3380686 A US3380686 A US 3380686A
- Authority
- US
- United States
- Prior art keywords
- strips
- winding
- magnetic
- webs
- electrically conducting
- 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
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Classifications
-
- 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
- B21C47/006—Winding-up, coiling or winding-off metal wire, metal band or other flexible metal material characterised by features relevant to metal processing only winding-up or winding-off several parallel metal bands
Definitions
- the difi'iculty is overcome by the provision of spaced rows of discrete braking magnets disposed across the total width of the partial strips with the magnets of each row being mutually spaced and adjacent rows being displaced laterally of the strips and relative to each other, to cause each of the partial strips to be subject to eddy current braking by the field of at least one of said magnets.
- the resultant individual braking of v the partial strips in turn results in substantially uniform winding tensions of all the strips being wound upon the common arbor.
- the present invention relates to the winding of metallic strips and the like elongated members upon a receiving arbor or mandrel and has for its main object the provision of an improved method and apparatus to control the winding tension of the strips, such as to keep the tension at a constant value throughout the winding or reeling operation.
- FIG. 1 is a schematic perspective view showing, by way of example, a slitting line or apparatus including a magnetic braking or deceleration device according to the invention
- HG. 2 is an enlarged schematic end view of the braking device of FIG. 1;
- FIG. 3 is a horizontal sectional view taken on line IIIIII of FIG. 2;
- FIG. 4 being a view similar to FIG. 1, shows a modified slitting and winding apparatus embodying the principles of the invention.
- the improved method of controlling the winding of a web or strip of electrically conducting material onto a reel or the like comprises essentially the step of passing the web or strip through a magnetic field of adequate strength before winding it onto the reel, to generate, at a given winding speed, eddy currents in the web or strip which, in a known manner react with the magnetic field to brake or decelerate the strip such as to maintain a substantially uniform tightness of winding on the reel or reels.
- the conversion of part of the kinetic energy of the strip or strips into electrical energy in the form of eddy currents results in the deceleration of the strips and corresponding increase of the winding tension.
- the invention involves the provision of apparatus for performing the said method comprising at least one permanent magnet or electromagnet having a pair of poles forming a gap through which is passed the strip or the like elongated member or members to be reeled or wound.
- a device of this nature being advantageously positioned at the trailing end of the sag provided ahead of the winding reel, makes it possible to exert a holding back action on the web or each of a number of strips parted therefrom without involving any direct mechanical action on or contact with the strips, thus obviating the risk of tearing or damaging the surfaces of the webs or strips being wound.
- the webs may simply be guided by rollers situated at the ingress and egress of the device.
- the poles of the braking magnet are advantageously covered by an insulating layer of small thickness, in such a manner as to prevent adherence or sticking of the webs or strips to the poles by direct magnetic attraction.
- suitable control means are provided to vary the width of the magnetic gap through which the strips or webs are passed, to adjust the strength of the magnetic field and/ or to facilitate passage of the webs or strips through the gap, or to adapt the device for use with strips of varying gauge thickness.
- the value of the braking force or deceleration applied to the strips which varies as a function of the square of the magnetic field for a given winding speed, may be controlled either by varying the gap between the magnet poles by any suitable means, in the case of permanent magnets, or by the variation of the electric exciting or energizing current or currents, when an electromagnet or magnets are employed.
- the invention may be advantageously applied to operations which include one or more rewinding stages and in which several strips of electrically conducting material are handled or processed simultaneously, examples being well-known pickling, sealing or painting lines or the like operations.
- the invention is also applicable to the rewinding of single strips or webs of any width, or the like elongated members, such as wires, coming either direct from a rolling mill, or from any other processing device, for example benches for tinning or edge rubbing, truing, pickling or painting lines, to name a few examples only.
- the invention in all these and similar processing operations, enables in a most simple manner evenly wound reels of controllable tightness and substantial uniformity to be obtained.
- the method and apparatus of the invention is applicable to metal strips, both magnetic and non-magnetic, as well as to any other electrically conducting materials. It is of particularly useful application where strips of weak or fragile metals or other conducting materials, whose surfaces should not come into direct or frictional contact with any mechanical parts or components, are to be wound or reeled. Other applications and uses, as well as advantages of the invention will become apparent as the description proceeds in reference to the drawings.
- the feed reel carrying the relatively wide web 11 is shown at 10, web 11 being slit, in the example illustrated, in the circular shearing mechanism 12, to form three fractional or partial webs or strips 13, 14 and 15 which are rewound as separate reels on a receiving arbor or mandrel 16.
- the sagging portions of the strips referred to hereinabove are shown at 17 and, in order to maintain this sag, the shearing mechanism 12 is advantageously operated in synchronism with the winding arbor 16 by any suitable means, as indicated by the dot-dash line 18 in the drawing.
- the runpast of the strips, or portions thereof near the trailing edge of the sag 17, are braked without mechanical friction in magnetic deceleration device 20, in such a manner that the strips 13, 14, 15, passing between poles N and S of the device, are each wound under substantially constant tension on the receiving arbor 16, thus ensuring that reels are obtained of uniform tightness, irrespective of any existing irregularities of the partial strips of webs.
- the braking magnet 20, being disposed at the trailing end of the sag 17, has its pole faces disposed adjoining and preferably parallel to the opposite sides of the web 11, or partial strips 13, 14, 15, respectively.
- the magnetic deceleration device 20 in the example more clearly shown in FIGS. 2 and 3, is constituted essentially by a frame 21 forming a closed magnetic circuit and being of any appropriate design, for example of laminated construction or sheets of high-permeability material.
- This frame carries a number of permanent magnets or electromagnets, which also may be of any appropriate construction and whose poles are denoted by the numeral 22 in the drawing.
- the poles in the case of a multiple strip winding arrangement as shown by the drawing are preferably arranged in transverse and staggered rows, or offset, as more clearly shown in FIG. 3, in such a manner that the partial webs or strips 13, 14, 15, etc. passing through the gaps of the magnets, are traversed by the magnetic field of at least one of the magnets, irrespective of the width of the strips or webs.
- the gaps of the magnets may be controlled either in unison, such as by adjustment of the common frame portion or yoke 21a as indicated by the arrows a in FIG. 2, or separately by individual adjustment of the poles, to cause a selective variation of the deceleration action to be exerted on each of the strips 13, 14, 15.
- the energizing current through the separate exciting windings 22a may be controlled by any suitable means to achieve the same effect or result.
- Variation of the gap width also enables the device to be adapted for use with webs or strips of ditferent thickness, or to afford easy engagement or passage of the strips or the like elongated members through the magnetic gaps or braking fields.
- the device may comprise simply one permanent magnet or an electromagnet, but remaining unchanged otherwise.
- the poles of the magnets may be spread apart as desired, or else the magnetic deceleration device 20 may be split into two parts arranged for separation along a plane corresponding to the gap or gaps.
- the tension of the strips established according to the invention may be augmented by employing one or a set of braking rollers, such as shown at 23, 24, 25 in FIG. 4 and situated between the magnetic deceleration device 20 and the winding arbor 16.
- the magnetic braking field within the gap or gaps between the poles N and S should be of sufficient strength, by the proper design and adjustment of the magnets 22, to result in the generation of eddy currents'of adequate intensity in the strips or webs, or the like elongated members in passing through the magnetic field at a given winding speed, to produce a braking or deceleration effect sufficient to ensure a desired winding tightness, in the manner understood from the foregoing.
- apparatus for the simultaneous winding of a plurality of juxtaposed strips of electrically conducting material including a rotating winding arbor with means for winding thereon said strips at a predetermined winding speed, the provision of magnetic braking means ahead of said arbor, to maintain substantially constant winding tensions of said strips comprising a plurality of spaced rows of magnetic elements disposed across the total width of the strips with their pole faces close to but spaced from the strips, the elements of each of said rows having a mutual spacing distance and adjacent rows being displaced laterally of the strips and in respect to each other, whereby to cause each of said strips to be subject to eddy current braking by the magnetic field of at least one of said elements.
- strip winding apparatus as claimed in claim 1, including means to maintain a sag of said strips immediately ahead of said braking means.
- strip winding apparatus as claimed in claim 1, said strips arranged to pass through gaps of said magnetic elements, and means for varying the strength of the magnetic fields within said gaps.
- strip slitting and winding apparatus including a roll of electrically conducting strip material and a plurality of juxtaposed slitting devices, to subdivide the strip unwound from said roll into a plurality of partial strips, and a rotating arbor with means for winding thereon said partial strips at a predetermined winding speed, the provision of magnetic braking means interposed between said devices and said arbor, to maintain substantially constant winding tensions of said strips, said braking means comprising a plurality of spaced rows of magnetic element disposed across the total Width of said strips with their pole faces close to but spaced from said strips, the elements of each of said rows being displaced laterally of the strips and in respect to each other, whereby to cause each of said strips to be subject to eddy current braking by the magnetic field of at least one of said elements.
- said slitting means consisting of a row of rotary cutters, and means to synchronize said cutters with said arbor, to maintain a predetermined sag of the partial strips immediately ahead of said braking means.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Winding Of Webs (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR22209A FR1448915A (fr) | 1965-06-25 | 1965-06-25 | Procédé et dispositif de retenue sans frottements mécaniques, applicable aux enrouleurs de bandes en matières électriquement conductrices |
Publications (1)
Publication Number | Publication Date |
---|---|
US3380686A true US3380686A (en) | 1968-04-30 |
Family
ID=8583029
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US559834A Expired - Lifetime US3380686A (en) | 1965-06-25 | 1966-06-23 | Apparatus for winding electrically conducting metal strips |
Country Status (2)
Country | Link |
---|---|
US (1) | US3380686A (fr) |
FR (1) | FR1448915A (fr) |
Cited By (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3517894A (en) * | 1967-10-09 | 1970-06-30 | Edwin A Pauls | Device for creating tension in a travelling strip |
US3661116A (en) * | 1970-11-23 | 1972-05-09 | Bethlehem Steel Corp | Magnetic stabilizing means for strip |
US3666195A (en) * | 1969-01-23 | 1972-05-30 | Creil Const Mec | Braking device for use in winding multiple strips upon a common mandrel |
US3672595A (en) * | 1970-03-20 | 1972-06-27 | Allan Wood Steel Co | Drag wipe |
US3863858A (en) * | 1973-11-09 | 1975-02-04 | Ford B Cauffiel | Tensioning apparatus |
US3949920A (en) * | 1974-08-01 | 1976-04-13 | Uniroyal Inc. | Fabric alignment apparatus |
US4219168A (en) * | 1979-03-26 | 1980-08-26 | H. J. Ruesch Machine Co. | Slitting and rewinding assembly |
US4304346A (en) * | 1978-08-24 | 1981-12-08 | Walzmaschinenfabrik August Schmitz Gmbh | Strip-withdrawal device for metal ribbons to be wound |
US4915318A (en) * | 1985-09-26 | 1990-04-10 | John Lysaght (Australia) Limited | Electromagnetic drag mechanisms for ferrous strip |
US5016832A (en) * | 1989-08-21 | 1991-05-21 | Kuhlman Corporation | Method and apparatus for winding an amorphous magnetic toroidal transformer core |
US5989684A (en) * | 1997-01-22 | 1999-11-23 | Eis, Inc. | Methods, apparatus, and articles of manufacture for use in forming stator slot wedges |
US6019200A (en) * | 1995-07-06 | 2000-02-01 | Tridelta Magnetsysteme Gmbh | Device for braking electrically conducting strips |
US6964392B1 (en) * | 2003-06-24 | 2005-11-15 | Matsunaga Douglas S | Variable strip tensioner |
US20060022080A1 (en) * | 2004-07-28 | 2006-02-02 | Gonzalo Salvador | Tensioning board for slit metal rewinding |
US20090026303A1 (en) * | 2004-12-16 | 2009-01-29 | Eckard Schmitz | Method For Braking A Running Metal Strip And Unit For Carrying Out The Method |
CN105369032A (zh) * | 2015-11-24 | 2016-03-02 | 中冶南方工程技术有限公司 | 一种电磁涡流动态张力控制器 |
US10167158B2 (en) * | 2016-11-08 | 2019-01-01 | Tsudakoma Kogyo Kabushiki Kaisha | Slitter device |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2393243A (en) * | 1943-10-06 | 1946-01-22 | Western Electric Co | Strand handling apparatus and a method of handling strands |
US2433014A (en) * | 1943-03-31 | 1947-12-23 | Carnegie Illinois Steel Corp | Apparatus for handling metallic strip |
US2610806A (en) * | 1950-09-20 | 1952-09-16 | Du Pont | Constant tension winding |
US2731212A (en) * | 1953-02-13 | 1956-01-17 | Richard S Baker | Polyphase electromagnet strip guiding and tension device |
US3046823A (en) * | 1957-10-04 | 1962-07-31 | Riegel Paper Corp | Tensioning device for a web in a slitting apparatus |
US3283980A (en) * | 1964-11-19 | 1966-11-08 | Bucciconi Eng Co | Apparatus for handling metal sheeting |
-
1965
- 1965-06-25 FR FR22209A patent/FR1448915A/fr not_active Expired
-
1966
- 1966-06-23 US US559834A patent/US3380686A/en not_active Expired - Lifetime
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2433014A (en) * | 1943-03-31 | 1947-12-23 | Carnegie Illinois Steel Corp | Apparatus for handling metallic strip |
US2393243A (en) * | 1943-10-06 | 1946-01-22 | Western Electric Co | Strand handling apparatus and a method of handling strands |
US2610806A (en) * | 1950-09-20 | 1952-09-16 | Du Pont | Constant tension winding |
US2731212A (en) * | 1953-02-13 | 1956-01-17 | Richard S Baker | Polyphase electromagnet strip guiding and tension device |
US3046823A (en) * | 1957-10-04 | 1962-07-31 | Riegel Paper Corp | Tensioning device for a web in a slitting apparatus |
US3283980A (en) * | 1964-11-19 | 1966-11-08 | Bucciconi Eng Co | Apparatus for handling metal sheeting |
Cited By (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3517894A (en) * | 1967-10-09 | 1970-06-30 | Edwin A Pauls | Device for creating tension in a travelling strip |
US3666195A (en) * | 1969-01-23 | 1972-05-30 | Creil Const Mec | Braking device for use in winding multiple strips upon a common mandrel |
US3672595A (en) * | 1970-03-20 | 1972-06-27 | Allan Wood Steel Co | Drag wipe |
US3661116A (en) * | 1970-11-23 | 1972-05-09 | Bethlehem Steel Corp | Magnetic stabilizing means for strip |
US3863858A (en) * | 1973-11-09 | 1975-02-04 | Ford B Cauffiel | Tensioning apparatus |
US3949920A (en) * | 1974-08-01 | 1976-04-13 | Uniroyal Inc. | Fabric alignment apparatus |
US4304346A (en) * | 1978-08-24 | 1981-12-08 | Walzmaschinenfabrik August Schmitz Gmbh | Strip-withdrawal device for metal ribbons to be wound |
US4219168A (en) * | 1979-03-26 | 1980-08-26 | H. J. Ruesch Machine Co. | Slitting and rewinding assembly |
US4915318A (en) * | 1985-09-26 | 1990-04-10 | John Lysaght (Australia) Limited | Electromagnetic drag mechanisms for ferrous strip |
US5016832A (en) * | 1989-08-21 | 1991-05-21 | Kuhlman Corporation | Method and apparatus for winding an amorphous magnetic toroidal transformer core |
US6019200A (en) * | 1995-07-06 | 2000-02-01 | Tridelta Magnetsysteme Gmbh | Device for braking electrically conducting strips |
US5989684A (en) * | 1997-01-22 | 1999-11-23 | Eis, Inc. | Methods, apparatus, and articles of manufacture for use in forming stator slot wedges |
US6964392B1 (en) * | 2003-06-24 | 2005-11-15 | Matsunaga Douglas S | Variable strip tensioner |
US20060022080A1 (en) * | 2004-07-28 | 2006-02-02 | Gonzalo Salvador | Tensioning board for slit metal rewinding |
US7044416B2 (en) * | 2004-07-28 | 2006-05-16 | Gonzalo Salvador | Tensioning board for slit metal rewinding |
US20090026303A1 (en) * | 2004-12-16 | 2009-01-29 | Eckard Schmitz | Method For Braking A Running Metal Strip And Unit For Carrying Out The Method |
US7786693B2 (en) * | 2004-12-16 | 2010-08-31 | Eckard Schmitz | Method for braking a running metal strip and unit for carrying out the method |
CN105369032A (zh) * | 2015-11-24 | 2016-03-02 | 中冶南方工程技术有限公司 | 一种电磁涡流动态张力控制器 |
CN105369032B (zh) * | 2015-11-24 | 2018-06-12 | 中冶南方工程技术有限公司 | 一种电磁涡流动态张力控制器 |
US10167158B2 (en) * | 2016-11-08 | 2019-01-01 | Tsudakoma Kogyo Kabushiki Kaisha | Slitter device |
Also Published As
Publication number | Publication date |
---|---|
FR1448915A (fr) | 1966-08-12 |
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