WO2013122099A1 - Procédé et dispositif de découpage au laser - Google Patents

Procédé et dispositif de découpage au laser Download PDF

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Publication number
WO2013122099A1
WO2013122099A1 PCT/JP2013/053383 JP2013053383W WO2013122099A1 WO 2013122099 A1 WO2013122099 A1 WO 2013122099A1 JP 2013053383 W JP2013053383 W JP 2013053383W WO 2013122099 A1 WO2013122099 A1 WO 2013122099A1
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WO
WIPO (PCT)
Prior art keywords
cutting
cutting line
laser
scrap
line
Prior art date
Application number
PCT/JP2013/053383
Other languages
English (en)
Japanese (ja)
Inventor
雅典 赤木
信一郎 北川
Original Assignee
日産自動車株式会社
オートモーティブエナジーサプライ株式会社
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 日産自動車株式会社, オートモーティブエナジーサプライ株式会社 filed Critical 日産自動車株式会社
Publication of WO2013122099A1 publication Critical patent/WO2013122099A1/fr

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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
    • 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
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/08—Devices involving relative movement between laser beam and workpiece
    • B23K26/0869—Devices involving movement of the laser head in at least one axial direction
    • B23K26/0876—Devices involving movement of the laser head in at least one axial direction in at least two axial directions
    • 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
    • B23K26/36—Removing material
    • B23K26/40—Removing material taking account of the properties of the material involved
    • 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
    • B23K37/02—Carriages for supporting the welding or cutting element
    • B23K37/0211—Carriages for supporting the welding or cutting element travelling on a guide member, e.g. rail, track
    • B23K37/0235—Carriages for supporting the welding or cutting element travelling on a guide member, e.g. rail, track the guide member forming part of a portal
    • 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
    • B23K2101/36—Electric or electronic devices
    • B23K2101/38—Conductors
    • 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
    • B23K2103/08—Non-ferrous metals or alloys
    • B23K2103/10—Aluminium or alloys thereof
    • 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
    • B23K2103/16—Composite materials, e.g. fibre reinforced
    • B23K2103/166—Multilayered materials
    • B23K2103/172—Multilayered materials wherein at least one of the layers is non-metallic
    • 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
    • B23K2103/50—Inorganic material, e.g. metals, not provided for in B23K2103/02 – B23K2103/26

Definitions

  • the present invention relates to a laser cutting method and a laser cutting device, and more particularly to a laser cutting method and a laser cutting device for cutting a sheet-like member with a laser.
  • Patent Document 1 Japanese Patent Document 1
  • the metal foil that is the base of the battery tab is cut with a laser, burrs are generated along the cutting line irradiated with the laser beam. There is a problem that the burr may be caught when removing the cut unnecessary portion (scrap) and cannot be removed well.
  • an object of the present invention is to provide a laser cutting method and a laser cutting apparatus that can reliably remove unnecessary portions generated during laser cutting.
  • the laser cutting method of the present invention sets a first cutting line for cutting a product shape from a sheet-like member, cuts along a part of the first cutting line, and cuts from the first cutting line.
  • a second cutting line for further laser irradiation is set in a region to be removed as an unnecessary portion afterwards. Then, laser light is irradiated along the first cutting line and the second cutting line.
  • a laser cutting apparatus of the present invention has a laser irradiation means and a control means so that the control means follows the first cutting line and the second cutting line in the laser cutting method. Further, the irradiation direction of the laser light emitted from the laser irradiation means is controlled.
  • the second cutting line is provided along a part of the first cutting line that separates the member by irradiating the laser beam, in the portion irradiated with the laser beam by the second cutting line, The generated burrs will be separated from the unnecessary part side.
  • the part which an unnecessary part side does not catch on the product side is made. Since there is a portion that is not caught by this product, the unnecessary portion is easily detached from the product side when the unnecessary portion is pulled away, and the unnecessary portion can be reliably removed.
  • (a) is a top view which shows the principal part seen from the top
  • (b) is a side view. It is a perspective view which shows the external appearance of the battery by which lamination sealing was carried out.
  • (A) is a top view which shows the state before tab formation of a battery
  • (b) is a top view which shows the state after tab formation of a battery.
  • FIG. 1A and 1B are schematic views for explaining a laser cutting apparatus to which the present invention is applied, in which FIG. 1A is a plan view showing a main part viewed from above, and FIG. 1B is a side view.
  • This laser cutting device is a device for forming an electrode tab from an electrode foil drawn from the exterior of the battery.
  • the electrode foil is a sheet-like member that creates a product shape by laser cutting.
  • the metal foil which has come out from the exterior of the battery in a state before being cut into the shape of the electrode tab which is a product shape is referred to as an electrode foil.
  • a laser cutting device 1 includes a stage 11 on which a battery 100 as a workpiece is placed, a laser irradiation device 12 that irradiates laser light, and a scrap removal unit 13 that removes unnecessary portions (scrap 120) after cutting. Become.
  • the stage 11 is integrally attached with a base 14 on which electrode foils 111 and 112 (see FIG. 3) extending from the battery 100 are placed.
  • a step is provided between the stage surface and the pedestal surface. This is because the electrode foils 111 and 112 are placed on the pedestal 14 when the laminate-sealed portion of the battery 100 (referred to as the main body portion 110) is placed on the stage 11. .
  • the electrode foils 111 and 112 are not deformed when the scrap removing unit 13 is pressed against the scrap 120 from above, as will be described later.
  • the laser irradiation device 12 includes a laser irradiation unit 21 (laser irradiation unit) that irradiates the electrode foils 111 and 112 with laser light, and a control unit 22 (control unit) that controls the laser light to draw a locus along a predetermined cutting line. )have.
  • the laser irradiation unit 21 is attached to, for example, an arm 25 extending from the outside of the stage 11.
  • the laser irradiation unit 21 rotates around two axes (axis 26 and axis 27) by motors (not shown).
  • a laser irradiation unit 21 may be provided at the tip of the arm of the multi-axis robot so that the direction of the laser beam can be freely changed.
  • the control unit 22 controls the motors of the shafts 26 and 27 so that laser light is irradiated along a cutting line to be described later.
  • the control unit 22 also controls on / off of laser irradiation and the operation of the scrap removing unit 13.
  • the control unit 22 is illustrated in FIG. 1B, the control unit 22 does not have to be in the vicinity of the stage 11, and is connected to each unit by a signal line or the like, and where the laser beam direction can be freely controlled. There may be.
  • the laser irradiation unit 21 is connected to a laser generation source (not shown), and laser light guided from the laser generation source is emitted from the tip of the laser irradiation unit 21.
  • FIG. 2 is a perspective view showing the appearance of a laminated battery.
  • FIG. 3A is a plan view showing a state before tab formation
  • FIG. 3B is a plan view showing a state after tab formation.
  • the battery 100 described here is a battery in which a power generation element is sealed with a laminate film.
  • a laminate film has a laminated film structure in which a metal foil (for example, an aluminum foil) is sandwiched between resin films.
  • the battery 100 covered (sealed) with the laminate film is entirely covered with the laminate film 200 and has a power generation element inside.
  • the portion covered with the laminate film 200 (with the power generation element included) is referred to as a main body portion 110.
  • two tabs (positive electrode tab 101 and negative electrode tab 102) serving as electrode terminals are drawn from one side.
  • the laminate film 200 is sealed by being bonded by thermal fusion or an adhesive at the peripheral edge portion 210 thereof.
  • 4 and 5 are explanatory diagrams for explaining the cutting operation by the laser cutting device 1.
  • the battery 100 is placed on the stage 11, as shown in FIG.
  • the battery 100 is in a state before the electrode foils 111 and 112 are cut into a tab shape (referred to as before the tab processing).
  • the scrap removing unit 13 is in an open state as shown in FIG.
  • the electrode foils 111 and 112 are positioned so as to be on the pedestal 14.
  • an abutting member for abutting and positioning the end of the battery 100 on the stage 11 may be provided.
  • laser light is irradiated from the laser irradiation unit 21 to the electrode foils 111 and 112 of the battery 100 before the tab processing along a predetermined cutting line. This cutting line will be described later.
  • the arm 31 is tilted about the fulcrum 33 and the suction pad 32 is brought on the electrode foils 111 and 112 of the battery 100. In this state, the suction pad 32 sucks the scrap 120.
  • the suction pad 32 is returned to the original position.
  • the suction pad 32 moves in an arc shape. Therefore, the scrap 120 is not lifted vertically upward with respect to the electrode foils 111 and 112 of the battery 100 but is pulled obliquely (in the direction of the arrow b in the figure) in the direction above the fulcrum 33, which is the direction in which the suction pad 32 opens. Will be.
  • scrap 120 is collected by dropping the suction force when the suction pad 32 is opened approximately 45 degrees to 90 degrees, and dropping the scrap 120.
  • FIG. 6 is an enlarged plan view of an electrode foil portion for explaining a cutting line that becomes an irradiation locus of laser light to the electrode foil.
  • the overlapping routes b and c and routes f and h are not completely on the same line, but are shifted toward the area where the routes c and h are on the scrap 120 side with respect to the routes b and f.
  • This deviation is paths d and g.
  • two island-shaped scraps 121 having substantially triangular shapes are formed by the routes b, c, d and the routes f, g, h together with the scrap 120 separated.
  • the paths a, b, d, e, f, g, and i are the first cutting lines
  • the paths c and h are the second cutting lines. Therefore, the second cutting line is set along a part of the first cutting line in the middle of the first cutting line.
  • the order of the routes d, b, and c and the routes f, g, and h may be reversed. That is, as shown in FIG. 7, the entire route passes through routes a, c ′, b ′, and d ′, passes again through c ′, passes through routes h ′, g ′, and f ′, and passes again through route h ′.
  • the order may be to pass through the route i.
  • the traveling direction of the laser trajectory of the cutting line when irradiating the laser with a single stroke is such that the second cutting line is performed first, and the effect is the same.
  • the burr generated on the tab 101 side as a product and the burr generated on the scrap 120 side are separated by the amount of the island-shaped scrap 121. For this reason, when the scrap 120 is pulled away, the burr at this portion is not caught.
  • the cut out island-shaped scrap 121 is a very small object, and may be sucked and collected by, for example, a suction machine (suction cleaner).
  • the electrode foil 111 to be the positive electrode tab 101 is shown, but the electrode foil 112 to be the negative electrode tab 102 has the same shape, and thus the first cutting line and the second cutting line are set similarly.
  • the preferred position for setting the overlapping route does not have to extend over the entire length of the cutting line, and may be a part of it as shown. This is determined by the direction in which the scrap 120 is removed and the position where the scrap 120 is sucked by the suction pad 32.
  • the scrap 120 when removing the scrap 120, the scrap 120 is sucked by the suction pad 32, and the suction pad 32 is moved in an arc shape and removed.
  • the paths b and f of the cutting line in the same direction as the locus of the arc drawn by the suction pad 32 are the gap (cutting portion) between the tab 101 and the scrap 120. Does not spread.
  • the burrs move in a rubbing direction and are easily caught.
  • the present invention is not limited to this.
  • a second cutting line that overlaps only in one of the paths in the same direction as the arc trajectory drawn by the suction pad 32 is provided. Just as good.
  • the cutting line portion far from the position attracted by the suction pad 32 is easily deformed. Therefore, if a burr is caught, the scrap 120 may not be removed due to deformation while being caught.
  • the second cutting line along the first cutting line sucks the protruding portion 125 of the two protruding portions 125 and 126 of the scrap 120 having a concave shape
  • the second cutting line starts from the suction position. Even if it is provided on the far side of the protruding portion 126 side, it is effective.
  • the position where the second cutting line along a part of the first cutting line is provided is as follows.
  • the scrap 120 is moved obliquely upward and removed.
  • the second cutting line is set at a position along the portion where the gap formed by cutting with the first cutting line does not widen in plan view.
  • the scrap 120 has a concave shape in which two projecting portions 125 and 126 projecting to the tab shape (product shape) side are connected, of the two projecting portions 125 and 126 having the concave shape.
  • One (protruding part 125) of this is adsorbed with an adsorption pad.
  • the second cutting line is provided in a region along the first cutting line between the protrusion 126 on the side not sucked by the suction pad 32 and the product shape.
  • the second cutting line may be set at a position along a portion where the gap formed by cutting with the first cutting line does not widen in a plan view.
  • the burrs on the tabs 101 and 102 (product) side after cutting and the burrs on the scrap 120 (unnecessary part) side formed by laser irradiation are provided. During this period, two laser irradiation trajectories are formed. In the portion irradiated with the laser along the second cutting line, the burrs on the tab (product) side after cutting and the burrs on the scrap 120 (unnecessary portion) side are not in direct contact with each other. It won't get caught. For this reason, the burr is hardly caught at the portion where the burr is most easily caught, and the scrap 120 can be reliably removed.
  • the second cutting line is the first position where the gap between the product shape after cutting and the scrap 120 does not widen with the movement of the scrap 120 in plan view. It was decided to set in the area along one cutting line. For this reason, it is possible to prevent the burr from being caught at a portion where the burr is easily caught during scrap removal.
  • the second cutting line is provided only for the part that is most likely to catch the burr as described above, the laser irradiation trajectory is not extended as much as compared with the case of cutting only the first cutting line. In addition, scrap removal can be reliably performed.
  • the scrap 120 (unnecessary portion) has a concave shape to which two projecting portions 125 and 126 projecting toward the tabs 101 and 102 (product shape) are connected. Since the scrap 120 is removed by adsorbing and removing the portion of one of the projecting portions 125 with the suction pad 32, the second cutting line is formed on the side of the projecting portion 126 that is not attracted by the suction pad 23. It was provided along the cutting line. As a result, the burr can be prevented from being caught at a portion where the burr is more easily caught at the time of scrap removal.
  • the control unit 22 is controlled to irradiate the laser beam emitted from the laser irradiation unit 21 along the first cutting line and the second cutting line described above. Thereby, in the part irradiated with the laser along the 2nd cutting line, the catch of a burr
  • the second cutting line may be set in an area on the scrap (unnecessary part) side substantially parallel to the first cutting line.
  • the island-shaped scrap has a substantially rectangular shape.
  • the second cutting line may be set in parallel to the scrap side area by a small amount that does not allow island scrap.
  • the laser beam is irradiated again in the direction returning from the top of the portion irradiated with the laser beam according to the first cutting line, and this becomes the second cutting line.
  • the laser beam is further irradiated in the direction of the first cutting line. Therefore, in this case, laser light irradiation is performed three times on the same path. For this reason, the burrs formed by laser irradiation of the first cutting line are further melted and disappeared by two times of laser irradiation, and the burrs themselves are reduced and are not caught.
  • the second cutting line is set at the same position as the first cutting line, the laser beam is irradiated several times on the same cutting line. For this reason, the area
  • the suction pad 32 for scrap removal is lowered after the laser irradiation, but this is to avoid interference between the laser beam and the scrap removal device (mainly the suction pad 32 and the arm 31). Therefore, by arranging the laser light and the scrap removal device so that they do not interfere even during laser irradiation, the suction pad 32 is lowered to the electrode foils 111 and 112 before laser irradiation, and after laser cutting, suction is performed. The pad 32 may be raised. As a result, the electrode foils 111 and 112 can be held by the suction pad 32 before the laser irradiation.
  • the battery has been described by taking an example in which two electrode tabs are drawn from one side.
  • the battery is not limited to such a form.
  • the electrode tabs are drawn from two opposite sides.
  • the present invention can also be applied to other batteries.

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

Abstract

Le procédé et le dispositif de découpage au laser de l'invention ont pour objectif de retirer de manière sûre les portions inutiles apparaissant lors d'un découpage au laser. Selon l'invention, suivant une partie (trajectoires (b, f)) de premières lignes de découpage (trajectoires (a, d, b, e, f, g, i)) selon lesquelles une forme d'article (101) est taillée à partir d'un élément sous forme de feuille, sont établies des secondes lignes de découpage (trajectoire c, h) selon lesquelles est effectuées une nouvelle irradiation au laser en une région davantage côté retrait des portions inutiles (chutes (120)) que les premières lignes de découpage. Le long des premières et des secondes lignes de découpage est irradié par un faisceau laser, et ledit objectif est ainsi atteint.
PCT/JP2013/053383 2012-02-13 2013-02-13 Procédé et dispositif de découpage au laser WO2013122099A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2012-028359 2012-02-13
JP2012028359A JP5997911B2 (ja) 2012-02-13 2012-02-13 レーザ切断方法およびレーザ切断装置

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108838558A (zh) * 2018-08-23 2018-11-20 深圳市海目星激光智能装备股份有限公司 一种切割模组、切割快换机构及激光切割设备
CN110640331A (zh) * 2019-08-23 2020-01-03 大族激光科技产业集团股份有限公司 一种软包电池极耳的激光切割工装及激光切割生产线
CN111312786A (zh) * 2020-02-28 2020-06-19 云谷（固安）科技有限公司 柔性显示面板及其制备方法

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JP6029351B2 (ja) * 2012-06-28 2016-11-24 日産自動車株式会社 レーザ切断方法、製品の製造装置、および製品の製造方法
CN108698172B (zh) * 2017-06-29 2021-01-12 深圳市大疆创新科技有限公司 电池极片的切割方法及设备
CN107790895A (zh) * 2017-11-01 2018-03-13 中国振华(集团)新云电子元器件有限责任公司(国营第四三二六厂) 电极箔的切割装置及其切割方法
CN115555852B (zh) * 2021-06-30 2023-06-30 宁德时代新能源科技股份有限公司 极片成型方法及设备

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JP2010034009A (ja) * 2008-07-31 2010-02-12 Nec Tokin Corp 積層型二次電池およびその製造方法
JP2011096620A (ja) * 2009-11-02 2011-05-12 Samsung Sdi Co Ltd 二次電池、その製造方法及び切断金型

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Publication number Priority date Publication date Assignee Title
JPH09128746A (ja) * 1995-10-31 1997-05-16 Hitachi Ltd 磁気ディスクの製造方法及び製造装置
JPH11144970A (ja) * 1997-11-11 1999-05-28 Toshiba Corp 変圧器鉄心の製造方法および装置
JP2010034009A (ja) * 2008-07-31 2010-02-12 Nec Tokin Corp 積層型二次電池およびその製造方法
JP2011096620A (ja) * 2009-11-02 2011-05-12 Samsung Sdi Co Ltd 二次電池、その製造方法及び切断金型

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108838558A (zh) * 2018-08-23 2018-11-20 深圳市海目星激光智能装备股份有限公司 一种切割模组、切割快换机构及激光切割设备
CN108838558B (zh) * 2018-08-23 2024-03-19 海目星激光科技集团股份有限公司 一种切割模组、切割快换机构及激光切割设备
CN110640331A (zh) * 2019-08-23 2020-01-03 大族激光科技产业集团股份有限公司 一种软包电池极耳的激光切割工装及激光切割生产线
CN110640331B (zh) * 2019-08-23 2021-06-01 大族激光科技产业集团股份有限公司 一种软包电池极耳的激光切割工装及激光切割生产线
CN111312786A (zh) * 2020-02-28 2020-06-19 云谷（固安）科技有限公司 柔性显示面板及其制备方法
CN111312786B (zh) * 2020-02-28 2022-11-15 云谷（固安）科技有限公司 柔性显示面板及其制备方法

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JP5997911B2 (ja) 2016-09-28

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