WO2013126145A1 - Procédé et dispositif pour découpe d'acier magnétique en bande mince - Google Patents

Procédé et dispositif pour découpe d'acier magnétique en bande mince Download PDF

Info

Publication number
WO2013126145A1
WO2013126145A1 PCT/US2013/000016 US2013000016W WO2013126145A1 WO 2013126145 A1 WO2013126145 A1 WO 2013126145A1 US 2013000016 W US2013000016 W US 2013000016W WO 2013126145 A1 WO2013126145 A1 WO 2013126145A1
Authority
WO
WIPO (PCT)
Prior art keywords
laser
strip material
plate
take
reel
Prior art date
Application number
PCT/US2013/000016
Other languages
English (en)
Other versions
WO2013126145A4 (fr
Inventor
Keith D. EARHART
John S. HURST
Original Assignee
Earhart Keith D
Hurst John S
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
Application filed by Earhart Keith D, Hurst John S filed Critical Earhart Keith D
Publication of WO2013126145A1 publication Critical patent/WO2013126145A1/fr
Publication of WO2013126145A4 publication Critical patent/WO2013126145A4/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/36—Removing material
    • B23K26/38—Removing material by boring or cutting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/08—Devices involving relative movement between laser beam and workpiece
    • B23K26/083—Devices involving movement of the workpiece in at least one axial direction
    • B23K26/0838—Devices involving movement of the workpiece in at least one axial direction by using an endless conveyor belt
    • B23K26/0846—Devices involving movement of the workpiece in at least one axial direction by using an endless conveyor belt for moving elongated workpieces longitudinally, e.g. wire or strip material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
    • B23K37/04—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
    • B23K37/0408—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work for planar work
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
    • B23K37/04—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
    • B23K37/0426—Fixtures for other work
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2101/00—Articles made by soldering, welding or cutting
    • B23K2101/16—Bands or sheets of indefinite length
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2103/00—Materials to be soldered, welded or cut
    • B23K2103/02—Iron or ferrous alloys
    • B23K2103/04—Steel or steel alloys

Definitions

  • the present invention relates to the processing of magnetic steel such as transformer core material.
  • magnetic steel such as transformer core material.
  • it relates to the cutting and slitting of amorphous metal and nano-grain steel.
  • Cutting and slitting of transformer core material such as silicon steel is traditionally performed using steel blades that may be hardened or strengthened in a number of ways as known in the art, in order to increase the longevity of the blade.
  • the slitting, in particular, of amorphous metal has also traditionally involved the use of mechanical blades, which result in unsatisfactory, often wavy, edge profiles.
  • the added challenge with slitting amorphous metal or other thin materials such as nano-grain steel (collectively referred to herein as thin strip material) is that they are of the order of 1-2 mils thick (1-2/1000* inch) and have little structural integrity. It is therefore difficult to center the strip of material.
  • the extremely thin material does not lend itself to being edge aligned using an edge plate, since the flimsy material will simply curve and run up the edge plate as it is spooled through the slitter.
  • the present invention relates to the processing of transformer core material.
  • it describes a method of controlling amorphous metal strip material and nano- grain steel material, and the slitting and cutting of such material.
  • a method of cutting or slitting a strip of thin magnetic steel of the order of substantially 1-2 mil thickness, e.g. nano-grain steel or amorphous metal, collectively referred to herein as thin strip material by cutting the strip using a laser.
  • the strip may be cut or slit using a continuous 20nm wavelength laser.
  • the strip may be cooled or quenched by applying a coolant, e.g., by spraying low temperature nitrogen, e.g., low temperature nitrogen gas onto the strip as it is cut.
  • the coolant improves the quality of the edge of the cut and reduces beading of the strip material as it is heated by the laser.
  • Oxygen gas may also be sprayed onto the material as it is cut in order to promote oxidation along the cut edges, thereby providing an oxide coating to the cut edge.
  • the strip may be spooled across a plate from a payout reel to one or more take up reels.
  • the laser may be mounted above the plate and the plate may be provided with one or more apertures located below the laser.
  • the one or more apertures may take the form of a slot configured to reduce fluttering of the strip as gas, such as nitrogen gas or oxygen gas, is sprayed onto the strip.
  • the aperture(s) may also be connected to a low pressure source to suck gas and any debris emanating from the slit strip, away from the plate.
  • the low pressure and aperture may be configured to maintain the strip in contact with the plate to keep the strip at the focal point of the laser, while limiting any distortion of the strip material.
  • One or more magnets may also be mounted to the plate to keep the strip substantially flat against the plate as the strip moves through the focal point of the laser. Since the strip material may not always be planar across its width, the plate may comprise a bevel plate that defines a beveled upper surface to form a central ridge defining a primary abutting region for the lower surface of the strip material as it travels across the plate.
  • the one or more apertures connected to the low pressure source, one or more magnets, and bevel plate may be used in the alternative or in conjunction with one another to assist in maintaining the strip material at the focal point of the laser.
  • an amorphous metal strip typically does not have a planar configuration but will include wavy portions that may be more pronounced toward the edges of the strip.
  • One aspect of the present disclosure lies in addressing inherent stresses in the thin strip material, which are released when the material is slit. In order to accommodate these stresses and the resultant varying tensions or lengths of the strips on the downstream side of the slitter, separately driven and controlled take-up reels may be provided.
  • the strip material may be slit into parallel sided strips of desired width or the strip may be cut or slit at a taper (single or double taper, i.e., at one or both ends of the strip) by slitting the strip using a laser.
  • the taper may be applied to one or both sides (left side or right side or both sides) of the strip.
  • Figure 1 shows a three dimensional stylized view of one embodiment of a laser slitter arrangement of the present disclosure
  • Figure 2 shows a three dimensional view of a plate forming part of the slitter arrangement of Figure 1.
  • the present disclosure provides a laser slitter arrangement for slitting or cutting thin strip material.
  • the laser slitter arrangement includes a winder 100 for winding material from a pay-out reel 102 mounted on a pay-out shaft (depicted by the central circle 103 in the middle of the pay-out reel 102) to at least one take-up reel or mandrel.
  • three take-up reels 104, 106, 108 are provided, which are mounted on take-up shafts (which are again depicted by central circles 105, 107, 109).
  • a web guide is provided, which may take any one of a number of forms, e.g., pairs of rollers 110,112 that are axially angled relative to each other, or any other suitable web guide arrangement.
  • the pay-out reel 102 may be provided with a friction brake or an eddy current clutch (not shown) to control the tension of the strip material as it is wound onto the take-up reels 104, 106, 108, or the pay-out reel 102 may be separately driven and the relative speed of the take- up reels adjusted to take account of changes in material build-up on the take-up reels and releases of stress in the material, as is discussed in greater detail below.
  • each of the take up reels 104, 106, 108 is individually driven and controlled to maintain a uniform tension for each of the strips 132, 134, 136 on the downstream side of the lasers
  • a first laser 120 and a second laser 122 are mounted above the incoming strip material 124, thereby allowing the incoming strip on the upstream side 140 of the laser to be slit into three strips, thereby providing strips 132, 134, 136 on the downstream side 142 of the lasers.
  • the lasers 120, 122 are 20 nm continuous wavelength lasers.
  • the lateral position of the lasers may be chosen to provide at least one strip 134 of a desired width, and two side strips 132, 136 that may themselves be of a desired width or that may subsequently be slit further, or constitute scrap or drop.
  • apertures 200, 202 in the form of longitudinally and laterally extending slots are provided in the plate 114 as shown in Figure 2.
  • the lasers 120, 122 are mounted above the apertures 200, 202 and the slot size and shape is configured to reduce fluttering of the strip as nitrogen gas and oxygen gas (discussed further below) are sprayed onto the strip.
  • the apertures avoid blow-back or gas deflection from the plate and thus reduce fluttering of the material.
  • the laterally extending slots accommodate lateral movement of the lasers.
  • the plate can also be moved in conformity with the movement of the lasers, thereby avoiding the need for laterally extending slits. It will be appreciated that if the two lasers need to be moved laterally independently of each other, e.g., in order to slit non-parallel-sided strips, the plate 114 may be implemented as a split plate to allow each portion of the plate to move independently under each of the lasers.
  • the apertures 200, 202 extend to a channel formed in the plate (not shown), which is connected to a low pressure source 210, such as a vacuum pump, to suck the gas and any debris emanating from the slit strip, away from the plate.
  • the low pressure source and apertures may be configured to maintain the strip in contact with the plate to keep the strip at the focal point of the lasers.
  • one or more magnets may also be mounted beneath or into the plate 1 14 as depicted by the magnets 220 to keep the strip substantially flat against the plate as the strip moves across the plate 1 14 through the focal points of the lasers.
  • the upper face of the bevel plate 114 tapers downward laterally from a central longitudinal line that extends in a direction from the upstream to the downstream side and corresponds to the center line of the incoming strip 124.
  • the resulting central, longitudinally extending ridge of the bevel plate 114 helps provide an abutting surface along the center line of the lower face of the strip 124 since the strip material typically has non-planar faces with increased unevenness or waviness toward the edges of the strip.
  • This beveled plate configuration therefore also helps keep the material at the focal points of the lasers.
  • Tension of the strip material is controlled in one embodiment by providing a load cell in the shaft supporting the upstream rollers 180 and controlling the tension on the pay-out reel 102 using a friction brake or an eddy current clutch.
  • the strip or web positioning and tension control can instead be achieved in other ways.
  • the take-up reels 104, 106, 108 are individually driven and their speeds separately controlled by a controller in relation to the pay-out reel 102, which may also be driven by a controllable motor drive or controlled using a friction break or eddy current clutch, as discussed above.
  • the stresses and variations in tension across the width of the incoming strip material can be taken up as they are released down-stream of the lasers.
  • a single laser can be used and a beam splitter mounted in the laser beam to provide multiple laser beams.
  • a sensor in the form of a roller 170 mounted on a pivot arm 172 provides feedback on the build of the material on the middle take up reel 106. This allows the width of the wound ring to be adjusted in relation to the build or thickness of the ring, thereby allowing rings of desired profile to be wound.
  • the roller 170 and pivot arm 172 also serve to provide feedback on the build of the material on the take up reel 106, thereby allowing the motor driving the take up reel to be adjusted to maintain a constant linear speed to the strip material and thereby avoid variations in the cut quality by the constant power laser(s).
  • the build of the ring(s) can be calculated by the number of layers wound onto the take-up reel or mandrel, as defined by the number of rotations of the take-up reel.
  • the lateral position of the lasers 120, 122 can be controlled to provide wound rings with a desired cross-sectional profile.
  • only the central 134 strip is retained while the left and right strips 132, 136 are either discarded or wound onto take up reels for subsequent further processing.
  • the central strip 134 can thus be shaped to form a ring having a circular cross-sectional profile.
  • the sides of the incoming strip may be trimmed toward the leading and trailing ends of the strip to provide a single strip with tapered ends.
  • the length and shape of the taper can be chosen to achieve a ring with a cross-sectional profile that is either, substantially circular, octagonal, or square with rounded corners.
  • the lasers 120, 122 are mounted to be moveable laterally.
  • the lateral positioning of the laser beams can instead be controlled by providing adjustable mirrors, e.g., mirrors mounted on gimbals to reflect the laser beams to the desired location on the thin strip material or, in the case of a single laser, making use of a beam splitter, as discussed above, and controlling the resultant split beams.
  • the lateral position of the thin strip material can be adjusted so that the strip itself is moved laterally relative to the laser. All of these methods will be referred to herein as implementations in which laser beams are controlled to be laterally moveable relative to the thin strip material.
  • a cooling gas is blown onto the strip at the cutting point.
  • low temperature nitrogen gas is sprayed onto the strip from a nozzle surrounding the laser as the strip is slit.
  • Oxygen gas is added to the nitrogen gas in this embodiment to promote oxidation along the cut edges, thereby promoting an oxide coating to the cut edges.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Mechanical Engineering (AREA)
  • Plasma & Fusion (AREA)
  • Laser Beam Processing (AREA)

Abstract

Selon la présente invention, dans un procédé et un système pour découpe d'acier magnétique en bande mince tel qu'une matière de noyau de transformateur, un laser aimanté au-dessus de la matière et la matière est enroulée depuis une bobine débitrice vers une ou plusieurs bobines d'entraînement.
PCT/US2013/000016 2012-02-22 2013-01-14 Procédé et dispositif pour découpe d'acier magnétique en bande mince WO2013126145A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201261634123P 2012-02-22 2012-02-22
US61/634,123 2012-02-22

Publications (2)

Publication Number Publication Date
WO2013126145A1 true WO2013126145A1 (fr) 2013-08-29
WO2013126145A4 WO2013126145A4 (fr) 2013-10-31

Family

ID=49006103

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2013/000016 WO2013126145A1 (fr) 2012-02-22 2013-01-14 Procédé et dispositif pour découpe d'acier magnétique en bande mince

Country Status (1)

Country Link
WO (1) WO2013126145A1 (fr)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4265410A (en) * 1978-12-28 1981-05-05 Western Electric Company, Inc. Machine for winding strip material
US4854493A (en) * 1986-02-28 1989-08-08 Kawasaki Steel Corporation Method and apparatus for cutting welding steel strips
US5997232A (en) * 1997-01-23 1999-12-07 Rassellstein Hoesch Gmbh Method of making can bodies from sheet metal
US6369355B1 (en) * 1994-11-28 2002-04-09 Advance Cardiovascular Systems, Inc. Method and apparatus for direct laser cutting of metal stents
US6563081B2 (en) * 2000-04-14 2003-05-13 Iron S.P.A. Process for the laser and/or plasma cutting of strips, particularly metal coils, and relative continuous cutting lines
US7148446B2 (en) * 2002-09-28 2006-12-12 Trumpf Sachsen Gmbh Method and apparatus for laser cutting sheet metal parts
US20100139467A1 (en) * 2007-02-26 2010-06-10 Heinz Gutknecht Cutting device
US7999362B2 (en) * 2008-01-25 2011-08-16 Infineon Technologies Ag Method and apparatus for making semiconductor devices including a foil

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4265410A (en) * 1978-12-28 1981-05-05 Western Electric Company, Inc. Machine for winding strip material
US4854493A (en) * 1986-02-28 1989-08-08 Kawasaki Steel Corporation Method and apparatus for cutting welding steel strips
US6369355B1 (en) * 1994-11-28 2002-04-09 Advance Cardiovascular Systems, Inc. Method and apparatus for direct laser cutting of metal stents
US5997232A (en) * 1997-01-23 1999-12-07 Rassellstein Hoesch Gmbh Method of making can bodies from sheet metal
US6563081B2 (en) * 2000-04-14 2003-05-13 Iron S.P.A. Process for the laser and/or plasma cutting of strips, particularly metal coils, and relative continuous cutting lines
US7148446B2 (en) * 2002-09-28 2006-12-12 Trumpf Sachsen Gmbh Method and apparatus for laser cutting sheet metal parts
US20100139467A1 (en) * 2007-02-26 2010-06-10 Heinz Gutknecht Cutting device
US7999362B2 (en) * 2008-01-25 2011-08-16 Infineon Technologies Ag Method and apparatus for making semiconductor devices including a foil

Also Published As

Publication number Publication date
WO2013126145A4 (fr) 2013-10-31

Similar Documents

Publication Publication Date Title
US7370564B2 (en) Cutting device and transporting roller for webs of material
KR102133824B1 (ko) 유리 리본의 가공 방법
EP2505566B1 (fr) Procédés de fabrication d'un ruban de verre
US20140197144A1 (en) Method and device for slitting thin strip magnetic steel
KR101775207B1 (ko) 유리 리본 절단 방법
EP0224113A1 (fr) Méthode et dispositif pour couper au laser des matériaux composites
JP2015533763A (ja) 可撓性ガラスリボンのためのエッジ耳管理
KR101692368B1 (ko) 라벨 시트 절단 장치
JP2011057336A (ja) スリッター装置
US9962791B2 (en) Method and apparatus for laser processing a complex pattern on a continuous roll
WO2013126145A1 (fr) Procédé et dispositif pour découpe d'acier magnétique en bande mince
EP2842676B1 (fr) Dispositif de scie à fil
US9656831B2 (en) Traverse device and traverse method
KR920006557B1 (ko) 권철심용 스트립 절단방법 및 그 장치
JP2016011197A (ja) シート材蛇行制御装置及びスリッター装置、並びにシート材蛇行制御方法
KR101334617B1 (ko) 롤러 테이블 상에서 이송되는 압연 스트립의 측면 가이드 장치 및 그 방법
JPWO2013108472A1 (ja) ガラス板の切断線加工装置及び切断線加工方法
JP7460405B2 (ja) レーザー加工装置
CN214802268U (zh) 一种激光打孔机
JP2022054883A (ja) 基板のスクライブ装置及び基板のスクライブ方法
JP2022054882A (ja) 基板の送出装置及び基板の送出方法
JP2004188545A (ja) 切断装置
JPH0825090B2 (ja) スリット材巻き取り装置
JPH05277674A (ja) 急冷金属薄帯の誘導・捕捉方法及び装置
JPH04361827A (ja) スリット装置

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 13751284

Country of ref document: EP

Kind code of ref document: A1

WWE Wipo information: entry into national phase

Ref document number: 2013751284

Country of ref document: EP

NENP Non-entry into the national phase

Ref country code: DE