公开(公告)号：US20220297231A1

公开(公告)日：2022-09-22

申请号：US17806285

申请日：2022-06-10

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Masatoshi NISHIO ,  Manabu NISHIHARA ,  Takamichi KOMATSU

IPC: B23K26/06 ,  B23K26/70 ,  H01S5/0683 ,  H01S5/068 ,  H01S5/062

Abstract: The control unit executes: a first execution step of executing a processing program to set a target value to a value defined by a processing program and performing feedback control on a driving current of a laser oscillator; a detection step of detecting an output fluctuation during execution of the first execution step; a specification step of specifying a physical quantity for which a measured value within a predetermined monitoring time before an occurrence timing of the output fluctuation does not satisfy a predetermined condition as an abnormal physical quantity from a plurality of physical quantities measured during execution of the first execution step; and a program update step of detecting appearance of a predetermined feature in an abnormal physical quantity as a fluctuation factor during execution of a post-update processing program, and updating the processing program to correct the driving current to reduce a difference between the laser output power and the target value compared with when the output fluctuation occurs in the first execution step after detection of the fluctuation factor.

公开(公告)号：US20190293873A1

公开(公告)日：2019-09-26

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 ,  G02B6/42 ,  G02B6/26 ,  B23K26/03 ,  B23K26/06 ,  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：US20230001506A1

公开(公告)日：2023-01-05

申请号：US17826969

申请日：2022-05-27

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Hisayuki OGUCHI ,  Masatoshi NISHIO

IPC: B23K26/06 ,  B23K26/70

Abstract: Laser processing head 10 includes housing 11 and a plurality of optical components. Housing 11 is provided with partition wall 11a, first and second light entrance ports 12a, 12b through which first and second laser beams A, B respectively enter, and light irradiation port 13. Laser processing head 10 includes first and second photodetectors 91b, 92a provided around first and second light entrance ports 12a, 12b, respectively. First photodetector 91b is disposed opposite to second photodetector 92a across partition wall 11a. First photodetector 91b receives light in the second wavelength band including the wavelength of second laser beam B, and second photodetector 92a receives light in the first wavelength band including the wavelength of first laser beam A.

公开(公告)号：US20190351507A1

公开(公告)日：2019-11-21

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：US20210146481A1

公开(公告)日：2021-05-20

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 ,  B23K26/06 ,  B23K26/38 ,  B23K26/082

Abstract: A first detector detects an output of a reflected beam from an exit end surface of a first parallel plate. A determination unit determines that an abnormality occurs in the first parallel plate when the detection value of the first detector is smaller than a predetermined determination threshold.

公开(公告)号：US20210077946A1

公开(公告)日：2021-03-18

申请号：US17103021

申请日：2020-11-24

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Makoto RYUDO ,  Masatoshi NISHIO ,  Jingbo WANG

IPC: B01D53/04 ,  B01D53/26 ,  H01S5/022 ,  H01S5/068

Abstract: A laser device includes a laser oscillator, a dehumidifier, and a controller controlling an operation of the dehumidifier. The controller controls the dehumidifier such that the dew point inside the laser oscillator is lower than the first dew point when a monolayer or less of water molecules is adsorbed, or such that the dew point is equal to or higher than the second dew point when more than a monolayer of water molecules is adsorbed inside the laser oscillator, and is lower than the third dew point at which the dew condensation starts to occur inside the laser oscillator.