WO2020105243A1 - Procédé de soudage laser et stratifié - Google Patents

Procédé de soudage laser et stratifié

Info

Publication number
WO2020105243A1
WO2020105243A1 PCT/JP2019/033973 JP2019033973W WO2020105243A1 WO 2020105243 A1 WO2020105243 A1 WO 2020105243A1 JP 2019033973 W JP2019033973 W JP 2019033973W WO 2020105243 A1 WO2020105243 A1 WO 2020105243A1
Authority
WO
WIPO (PCT)
Prior art keywords
laser
path
laminated body
outer peripheral
state
Prior art date
Application number
PCT/JP2019/033973
Other languages
English (en)
Japanese (ja)
Inventor
秀明 赤星
山口　晃
幸太郎 藤倉
康晴 塚越
岩口　義政
康平 金谷
Original Assignee
本田技研工業株式会社
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 本田技研工業株式会社 filed Critical 本田技研工業株式会社
Priority to JP2020558101A priority Critical patent/JP7105912B2/ja
Publication of WO2020105243A1 publication Critical patent/WO2020105243A1/fr
Priority to PH12021550755A priority patent/PH12021550755A1/en

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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
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/20—Bonding
    • B23K26/21—Bonding by welding

Definitions

  • the present invention relates to a laser welding method and a laminated body.
  • laser spot welding is performed using a laser welding device.
  • a plurality of metal plates are melted by laser light and then cooled to weld the plurality of metal plates (for example, Patent Document 1).
  • the metal plate has a melting point or higher so as to form a first welding pattern capable of preheating the entire area of the welding target portion in a region inside the outer periphery of the welding target portion having a substantially circular outer shape in the metal plate.
  • a first welding pattern capable of preheating the entire area of the welding target portion in a region inside the outer periphery of the welding target portion having a substantially circular outer shape in the metal plate.
  • Patent Document 1 when the internal space is closed by the welded portion, the air in the closed space is heated at the time of welding to expand and pressurize the welded portion, thereby damaging the welded portion. It may end up. Further, in Patent Document 1, an edge protruding upward is generated in the inner portion of the welded portion, and the appearance and paintability of the laminated body after welding are poor and the quality is low.
  • the present invention has been made in view of such circumstances, and an object of the present invention is to provide a laser welding method and a laminated body capable of preventing damage to a welded portion and improving the quality of the laminated body after welding.
  • the laser welding method of the present invention is a laser welding method for irradiating and joining a laser beam to a laminated body formed by stacking a plurality of metal plates, and adjusting the output of the laser beam so that the laminated body can be melted.
  • the first step of irradiating along the outer peripheral path that extends so as to surround a predetermined portion of the laminated body in the state of being opened and at least a part of which is open, and the laser beam is performed after the first step.
  • the laser light is adjusted to be capable of melting the laminated body, and is extended to surround a predetermined portion of the laminated body, and at least a part of the outer peripheral path is opened. Since it has the 1st process of irradiating along, air between each metal plate (gap) of a layered product can be discharged from the above-mentioned opened part. This prevents the air in the gap between the metal plates of the laminated body from thermally expanding inside the welded portion of the laminated body and damaging the welded portion.
  • a second step of irradiating the laser beam along the inner peripheral portion of the outer peripheral path in a state where the output is adjusted so as to melt without passing through the uppermost metal plate of the laminated body Therefore, the edge generated on the inner peripheral portion of the welded portion welded in the first step can be melted by the laser light irradiated in the second step.
  • the appearance and paintability of the laminated body after welding can be improved, and the quality can be improved, as compared with those having an edge.
  • the laser is provided by a first path extending along an inner peripheral portion of the outer peripheral path and a second path extending in an opposite direction to the first peripheral path along an inner peripheral portion of the outer peripheral path. It is preferable to irradiate with light.
  • the laminated body of the present invention is a laminated body constituted by laminating a plurality of metal plates, and is a laser-welded laminated body, and the laser welding is performed on the lower surface of the lowermost metal plate of the plurality of metal plates.
  • the welded portion extends so as to surround a predetermined portion of the lowermost metal plate and is formed in a shape in which at least a part thereof is opened, and the upper surface of the uppermost metal plate of the plurality of metal plates is formed. Then, the welded portion is formed in a recessed shape.
  • the laminated body of the present invention since the welded portion is formed in a recessed shape on the upper surface of the uppermost metal plate of the plurality of metal plates, an edge protruding upward is formed in the welded portion.
  • the appearance and paintability of the laminated body after welding can be improved and the quality can be improved as compared with the case where there is an edge.
  • FIG. 5 is a cross-sectional view taken along line VV showing the laminated body that is irradiated with the laser light in the second state after being welded with the laser light in the first state.
  • a laser welding apparatus 10 that executes the laser welding method of the present embodiment includes a laser irradiation unit 11 that emits a laser beam L, and a laser control unit 12 that controls the driving of the laser irradiation unit 11. Equipped with.
  • the laser welding apparatus 10 joins the laminated body 15 that is used in a vehicle and that includes a first metal plate W1 and a second metal plate W2.
  • the laminated body 15 is placed on a supporting jig (not shown), and is joined by the laser welding device 10 while being sandwiched by the supporting jig and a clamper (not shown).
  • the laser welding apparatus 10 and the laminated body 15 are schematically illustrated.
  • the laser irradiation unit 11 includes a laser oscillator 11a.
  • the laser irradiation unit 11 also includes, for example, an X-axis galvanometer mirror that scans the laser light from the laser oscillator 11a in the X-axis direction, and a Y-axis galvanometer that scans the laser light scanned by the X-axis galvanometer mirror in the Y-axis direction.
  • a mirror and a condenser lens are provided.
  • the laser irradiation unit 11 also includes a known galvano scanner 11b having an X-axis motor that rotates an X-axis galvanometer mirror, a Y-axis motor that rotates a Y-axis galvanometer mirror, and a control driver (neither shown). With.
  • the structure of the galvano scanner 11b can be changed as appropriate.
  • the galvano scanner 11b rotates the X-axis galvanometer mirror and the Y-axis galvanometer mirror to an appropriate angle by using the X-axis motor and the Y-axis motor whose rotation angles are controlled by the control driver, and irradiates the laser light to a target position. ..
  • the laser irradiation unit 11 is attached to the first arm 17a of the robot 17.
  • the robot 17 is, for example, a multi-axis, multi-joint type robot, and is provided with first to fourth arms 17a to 17d in order from the tip.
  • the robot 17 is provided with a plurality of motors (not shown) that drive the arms 17a to 17d, and the drive is controlled by the robot controller 18.
  • the root of the robot 17 is supported on the ground or a pedestal (not shown) fixed to the ground.
  • the robot controller 18 drives a plurality of motors of the robot 17 to drive the arms 17a to 17d to control the position and the direction of the laser irradiation unit 11 attached to the arm 17a, and the laser irradiation unit 11 Are moved to the joint portion of the laminated body 15.
  • the robot controller 18 drives a plurality of motors of the robot 17 to drive the arms 17a to 17d so that the laser irradiation unit 11 is moved by a support jig and a clamper. Control is performed so as to maintain substantially the same distance from the upper surface of the sandwiched laminated body 15 (upper surface of the first metal plate W1) (hereinafter, referred to as same distance control).
  • the robot controller 18 drives the arms 17a to 17d to move the laser irradiation unit 11 to the right in FIGS. 1 to 5 at a constant speed while performing the same distance control described above.
  • the laser control unit 12 operates the laser oscillator 11a and the galvano scanner 11b of the laser irradiation unit 11 that is moved to the right in FIGS.
  • the laser light L in the first state whose output (energy) is adjusted so that the fifteenth first metal plate W1 and the second metal plate W2 can be melted is irradiated (first step).
  • the laser control unit 12 extends the laser light L in the first state into a substantially arc-shaped outer peripheral route OR that extends so as to surround the predetermined portion 15a of the stacked body 15 and is at least partially opened. Irradiate along (first step).
  • the arrow on the outer peripheral route OR indicates the moving direction of the route.
  • the laser light L in the first state is irradiated along the outer peripheral route OR.
  • the outer peripheral route OR has a portion in which the direction of the route is leftward in FIGS. 2 and 3, and in this portion, the distance from the laser irradiation unit 11 moving to the right to the outer peripheral route OR becomes large, and the laser in the first state It is also necessary to change the irradiation direction of the light L.
  • the laser control unit 12 operates the galvano scanner 11b to change the scanning directions of the X-axis galvanometer mirror and the Y-axis galvanometer mirror to change the irradiation direction of the laser light L in the first state.
  • the laser light L in the first state is controlled to be emitted along the outer peripheral route OR.
  • the laser beam L in the first state is irradiated along the outer peripheral path OR, and the bead 25 (hatched portion in FIGS. 2 and 4) having the shape of the outer peripheral path OR surrounding the predetermined portion 15a is formed.
  • the laminated body 15 is joined.
  • the laser control unit 12 operates the laser oscillator 11a and the galvano scanner 11b of the laser irradiation unit 11 which are moved to the right in FIGS. 4 and 5 at a constant speed. Then, the laser beam L in the second state whose output is adjusted so as to be melted without penetrating the uppermost first metal plate W1 of the laminated body 15 is irradiated (second step). In the second step, the laser control unit 12 directs the laser light L in the second state to the first route R1 extending along the inner circumferential portion of the outer circumferential route OR and the outer route OR in the opposite direction to the first route R1. Irradiation is performed on the second route R2 extending along the inner peripheral portion.
  • the galvano scanner 11b is operated to change the scanning directions of the X-axis galvanometer mirror and the Y-axis galvanometer mirror to change the irradiation direction of the laser light L in the second state.
  • the irradiation is controlled to be performed along the first route R1 and the second route R2.
  • the portion of the surface of the first metal plate W1 that is irradiated with the laser light L in the second state (the portion that is thinly painted in FIG. 4) is melted and becomes the depressed shape D.
  • the irradiation range of the laser beam in the second state may include at least the first route R1, and the outer peripheral route OR and the first route R1 may be continuous or may have a gap.
  • the portion where the bead 25 is formed (the portion where the first metal plate W1 and the second metal plate W2 are welded) has a substantially arc shape (a peripheral route OR) in which a part is opened.
  • the air in the gap between the first metal plate W1 and the second metal plate W2 can be discharged from the open portion.
  • the air in the gap between the first metal plate W1 and the second metal plate W2 thermally expands inside the portion where the first metal plate W1 and the second metal plate W2 are welded, and the bead 25 is damaged.
  • the laser light L in the second state is irradiated on the first route R1 extending along the inner circumferential portion of the outer circumferential route OR (bead 25) (second step).
  • the output of the laser light L in the second state is adjusted so as to melt without passing through the uppermost first metal plate W1 of the stacked body 15.
  • the inner peripheral portion of the bead 25 (hatched portion) is overlapped with the portion irradiated with the laser light L in the second state (portion marked with thin ink in FIG. 4). Therefore, as shown in FIG. 5, the edge E formed on the inner peripheral portion of the bead 25 can be melted by the laser light L in the second state, and a new edge is not generated. Thereby, the appearance and paintability of the laminated body 15 after welding can be improved, and the quality can be improved.
  • the laser control unit 12 moves at predetermined intervals in the laminated body 15. Control is performed so as to perform the first step and the second step. Thereby, as shown in FIG. 1, the laminated body 15 is spot-welded at a predetermined interval and firmly joined.
  • the outer peripheral route OR is formed in a substantially arc shape, but it may be a partially open outer peripheral route, and may be a polygonal shape or an elliptical shape.
  • the laser light in the second state is emitted through the first route R1 and the second route R2, but at least the first route R1 may be emitted.
  • the outer peripheral route OR and the first route R1 may be continuous with each other or may have a gap therebetween.

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Mechanical Engineering (AREA)
  • Laser Beam Processing (AREA)
  • Sealing Battery Cases Or Jackets (AREA)

Abstract

L'invention concerne un procédé de soudage laser et un stratifié avec lesquels il est possible d'empêcher un endommagement d'une partie soudée et d'améliorer la qualité d'un stratifié après soudage. Une unité de commande laser 12 commande la commande d'une unité de rayonnement laser 11 de façon à amener une première feuille métallique W1 et une seconde feuille métallique W2 d'un stratifié 15 à être irradiées par une lumière laser L dans un premier état dans lequel la sortie est ajustée de sorte que la fusion soit possible. La lumière laser L dans le premier état est rayonnée le long d'un trajet périphérique externe sensiblement arqué OR qui s'étend de manière à entourer une partie prescrite 15a du stratifié 15 et qui a au moins une partie de celui-ci ouverte. L'unité de commande laser 12 commande l'entraînement de l'unité de rayonnement laser 11 de façon à amener la première feuille métallique W1, qui est la couche la plus élevée du stratifié 15, à être irradiée avec une lumière laser L dans un second état dans lequel la sortie est ajustée de telle sorte que la fusion est effectuée sans pénétrer dans la première feuille métallique W1. La lumière laser L2 dans le second état est rayonnée dans un premier trajet R1 qui s'étend le long d'une partie périphérique interne du trajet périphérique externe OR, et également dans un second trajet R2 qui s'étend le long de la partie périphérique interne du trajet périphérique externe OR dans la direction opposée à partir du premier trajet R1.
PCT/JP2019/033973 2018-11-20 2019-08-29 Procédé de soudage laser et stratifié WO2020105243A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2020558101A JP7105912B2 (ja) 2018-11-20 2019-08-29 レーザ溶接方法及び積層体
PH12021550755A PH12021550755A1 (en) 2018-11-20 2021-04-06 Laser welding method, and laminate

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2018-217556 2018-11-20
JP2018217556 2018-11-20

Publications (1)

Publication Number Publication Date
WO2020105243A1 true WO2020105243A1 (fr) 2020-05-28

Family

ID=70773886

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2019/033973 WO2020105243A1 (fr) 2018-11-20 2019-08-29 Procédé de soudage laser et stratifié

Country Status (3)

Country Link
JP (1) JP7105912B2 (fr)
PH (1) PH12021550755A1 (fr)
WO (1) WO2020105243A1 (fr)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018169033A1 (fr) * 2017-03-17 2018-09-20 本田技研工業株式会社 Élément de soudage et procédé de soudage au laser

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018169033A1 (fr) * 2017-03-17 2018-09-20 本田技研工業株式会社 Élément de soudage et procédé de soudage au laser

Also Published As

Publication number Publication date
JPWO2020105243A1 (ja) 2021-09-27
PH12021550755A1 (en) 2021-10-11
JP7105912B2 (ja) 2022-07-25

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