公开(公告)号：US11285564B2

公开(公告)日：2022-03-29

申请号：US16476075

申请日：2017-11-20

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Makoto Ryudo ,  Doukei Nagayasu ,  Hitoshi Nishimura ,  Jingbo Wang ,  Masatoshi Nishio ,  Hideaki Yamaguchi ,  Yoshiaki Takenaka ,  Kiyotaka Eizumi ,  Ryo Ishikawa

IPC: B23K26/08 ,  B23K26/06

Abstract: A laser processing head includes parallel plate (17) that shifts an optical axis of a laser beam to be emitted from a top to a bottom of body case (6) from a first optical axis to a second optical axis, parallel plate (19) that shift the optical axis of the laser beam from the second optical axis to a third optical axis, and body case (6) that accommodates holders (7 and 18) that respectively hold parallel plates (17 and 19). The laser processing head further includes a rotation mechanism that rotates holders (7 and 18) around a first rotary axis. Opening (7a) that a laser beam reflected by an incident surface of second parallel plate (19) passes through is formed in holder (7), and light receiving part (6a) that receives the laser beam having passed through opening (7a) is disposed in body case (6).

公开(公告)号：US10732365B2

公开(公告)日：2020-08-04

申请号：US16461637

申请日：2017-11-27

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Ryo Ishikawa ,  Makoto Ryudo ,  Doukei Nagayasu ,  Hitoshi Nishimura ,  Jingbo Wang ,  Masatoshi Nishio ,  Hideaki Yamaguchi ,  Yoshiaki Takenaka ,  Kiyotaka Eizumi

IPC: G02B6/42 ,  G02B6/02 ,  B23K26/035 ,  B23K26/00 ,  B23K26/06 ,  B23K26/067

Abstract: A condenser lens for collecting a laser beam (300) is disposed between the laser oscillator and the incident end surface of the optical fiber. The laser beam (300) is divided into a plurality of beams (303, 304). The power of the laser beam (304) is measured and maximized by adjusting the position of the condenser lens. The FFP of the laser beam (303) is measured and minimized by adjusting the position of the condenser lens. These adjusted positions are stored as the first and second lens positions. The FFP of the laser beam (303) is measured while the condenser lens is being moved between these positions so as to make the BPP not more than a predetermined value.

公开(公告)号：US11333833B2

公开(公告)日：2022-05-17

申请号：US16466404

申请日：2017-11-29

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Kiyotaka Eizumi ,  Makoto Ryudo ,  Doukei Nagayasu ,  Hitoshi Nishimura ,  Jingbo Wang ,  Masatoshi Nishio ,  Hideaki Yamaguchi ,  Yoshiaki Takenaka ,  Ryo Ishikawa

IPC: G02B6/32 ,  B23K26/03 ,  B23K26/06 ,  G02B6/26 ,  G02B6/42 ,  H01S5/022

Abstract: There is provided an optical axis alignment mechanism between the laser oscillator and the optical fiber. The laser oscillator emits laser light, which then emerges from the emission end of the optical fiber via the axis alignment mechanism. Part of the laser light is received on the light-receiving surface of the CCD camera of a laser light evaluator. Thus, the laser light evaluator acquires a light intensity distribution. The light intensity distribution is used by the optical axis alignment mechanism to align the axis of the laser oscillator with the axis of the optical fiber.

公开(公告)号：US10955618B2

公开(公告)日：2021-03-23

申请号：US16426699

申请日：2019-05-30

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Masatoshi Nishio ,  Hitoshi Nishimura ,  Jingbo Wang ,  Makoto Ryudo ,  Doukei Nagayasu ,  Hideaki Yamaguchi ,  Yoshiaki Takenaka ,  Kiyotaka Eizumi ,  Ryo Ishikawa ,  Yasushi Mukai

IPC: G02B6/26 ,  G02B6/32 ,  G02B6/42 ,  G02B19/00

Abstract: A fiber coupling device (100) includes the following components: a wedge plate (102) for receiving light and refracting the light in a predetermined direction, a condenser lens (104) for collecting the light refracted by the wedge plate (102); and an optical fiber (107) having an incident surface for receiving the light collected by the condenser lens (104). The wedge plate (102) is held rotatable around the optical axis (200) of the light incident on the wedge plate (102). The light refracted by the wedge plate (102) and collected by the condenser lens (104) is incident on a different point on the incident surface depending on the rotation angle of the wedge plate (102).

公开(公告)号：US10751833B2

公开(公告)日：2020-08-25

申请号：US16072232

申请日：2017-03-07

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Doukei Nagayasu ,  Hitoshi Nishimura ,  Makoto Ryudo ,  Jingbo Wang ,  Yoshiaki Takenaka ,  Kiyotaka Eizumi ,  Hideaki Yamaguchi ,  Ryo Ishikawa ,  Masatoshi Nishio

IPC: B23K26/035 ,  B23K26/064 ,  H01S3/10 ,  G02B6/28 ,  G02B6/42

Abstract: A fiber coupling device includes a housing and a window provided in the housing. The fiber coupling device is configured to collectively guide plural laser beams to at least a first fiber, the plurality of laser beams each being emitted from a corresponding one of plural external laser light sources and entering through a laser beam inlet. The housing is configured such that the laser beams enter the housing from the laser beam inlet. The window is provided inside the housing and faces the laser beam inlet. The fiber coupling device is not required to detach when an optical axis is adjusted.

公开(公告)号：US11806812B2

公开(公告)日：2023-11-07

申请号：US17162510

申请日：2021-01-29

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Masatoshi Nishio ,  Jingbo Wang ,  Hitoshi Nishimura ,  Motoki Morioka

IPC: B23K26/70 ,  B23K26/082 ,  B23K26/06 ,  B23K26/38

CPC classification number: B23K26/705 ,  B23K26/0648 ,  B23K26/082 ,  B23K26/38 ,  B23K26/707

Abstract: A detector is configured to detect an output of a reflected beam from an exit end surface of a parallel plate. A determination unit is configured to determine that an abnormality occurs in the parallel plate when a detection value of the detector is smaller than a determination threshold.

公开(公告)号：US11565345B2

公开(公告)日：2023-01-31

申请号：US16408681

申请日：2019-05-10

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Doukei Nagayasu ,  Hitoshi Nishimura ,  Jingbo Wang ,  Makoto Ryudo ,  Masatoshi Nishio ,  Hideaki Yamaguchi ,  Yoshiaki Takenaka ,  Kiyotaka Eizumi ,  Ryo Ishikawa

IPC: B23K26/06 ,  B23K26/38 ,  G02B6/42 ,  B23K26/064 ,  B23K26/073 ,  B23K26/03

Abstract: Laser processing device (1) includes: laser-beam switching apparatus (70) that switches between a first optical path and a second optical path as an optical path along which a laser beam is to travel, the first optical path including first fiber (11), the second optical path including second fiber (21) that has a core diameter that is larger than a core diameter of first fiber (11); and processing head (80) that illuminates a same processed point on workpiece (900) with a laser beam that has passed through the first optical path or the second optical path. When illumination with laser beam that has passed through the first optical path is performed for a predetermined period of time, laser-beam switching apparatus (70) switches from the first optical path to the second optical path.

公开(公告)号：US11060905B2

公开(公告)日：2021-07-13

申请号：US16417760

申请日：2019-05-21

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Jingbo Wang ,  Doukei Nagayasu ,  Yoshiaki Takenaka ,  Hitoshi Nishimura ,  Makoto Ryudo ,  Kiyotaka Eizumi ,  Hideaki Yamaguchi ,  Ryo Ishikawa ,  Masatoshi Nishio ,  Takasi Kakutani ,  Yasushi Mukai ,  Mitsuru Mukai ,  Hiroyuki Hayashikawa

IPC: G01J1/42 ,  B23K26/00 ,  G01J1/04 ,  B23K26/03 ,  B23K26/70 ,  H01S3/00 ,  B23K26/38 ,  B23K26/21

Abstract: A laser device includes: a laser resonator for emitting a laser beam; a condenser lens for collecting the laser beam emitted from the laser resonator; an optical fiber for transmitting the laser beam collected by the condenser lens; at least one light sensor opposing a light receiving surface of the condenser lens and outside an optical path of the laser beam, the at least one light sensor detecting an amount of return light from the condenser lens; and a controller for determining a presence of an abnormality when a value of the amount detected by the at least one light sensor is greater than a predetermined maximum threshold.

公开(公告)号：US10981246B2

公开(公告)日：2021-04-20

申请号：US16088617

申请日：2017-03-28

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Atsuhiro Kawamoto ,  Junji Fujiwara ,  Yasushi Mukai ,  Hitoshi Nishimura

IPC: B23K26/21 ,  B29C65/16 ,  B23K26/324 ,  B23K26/323 ,  B23K26/244 ,  B23K26/22 ,  B23K11/30 ,  B23K103/16 ,  B23K103/22 ,  B23K103/20

Abstract: A laser welding method according to the present disclosure includes a step in which a third material is interposed between a first material and a second material, which are made of the same type of metal so as to be weldable to one another, and at least one of which is provided with a protruding portion, wherein the third material is difficult to weld to the first material and the second material and has a through-hole portion into which the protruding portion is inserted. The method also includes a step in which, when the third material is interposed between the first material and the second material, a region corresponding to the protruding portion is irradiated with a laser beam from the first material side, and the first material and the second material are welded via the through-hole portion. In the step in which the third material is interposed between the first material and the second material, a first gap is provided between the protruding portion and the inner peripheral face of the through-hole portion, and a second gap corresponding to the plate thickness of the first material is provided between the first material and the second material in the region corresponding to the protruding portion.