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公开(公告)号：US20240424613A1
公开(公告)日：2024-12-26
申请号：US18815055
申请日：2024-08-26
Inventor： Kenta KUBOTA , Michio SAKURAI , Toshiyuki MISHIMA , Toru SAKAI
Abstract: Point group data obtained by measuring the penetration depth of a keyhole 66 during laser welding is divided into a plurality of regions in the depth direction of measured values, and evaluation data showing a change in number of points with time is acquired for each of the plurality of regions. An average variation in number of points is calculated for each of the plurality of regions based on the plurality of pieces of evaluation data. When the average variation is equal to or larger than a predetermined threshold, it is determined that measurement of the penetration depth of the keyhole 66 is unstable under the welding condition.
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2.发明公开公开(公告)号：US20240337608A1
公开(公告)日：2024-10-10
申请号：US18745125
申请日：2024-06-17
Inventor： Toru SAKAI , Michio SAKURAI , Daichi HIGASHI
IPC: G01N21/95 , G01N21/88 , G01N33/207 , G06T7/00
CPC classification number: G01N21/9515 , G01N21/8851 , G01N33/207 , G06T7/0004 , G01N2201/101 , G06T2207/20081 , G06T2207/30136
Abstract: An appearance inspection apparatus includes a shape measurement unit configured to measure the three-dimensional shape of a weld and a data processor configured to process sample shape data and shape data acquired by the shape measurement unit. The data processor includes a first learning data set generator configured to generate a plurality of first learning data sets based on the sample shape data, a second learning data set generator configured to generate a plurality of second learning data sets based on the first learning data sets, a determination model generator configured to generate multiple types of determination models using the second learning data sets, and a first determination unit configured to determine whether the shape of the weld is good or bad based on the shape data and one of the determination models.
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公开(公告)号：US20210023651A1
公开(公告)日：2021-01-28
申请号：US17066823
申请日：2020-10-09
Inventor： Michio SAKURAI , Toshiyuki MISHIMA , Toru SAKAI , Kenta KUBOTA , Kensuke URATA
Abstract: A plurality of values measured are relatively compared to determine an optical axis deviation direction in which an optical axis of a measurement beam S deviates from a laser beam L. In performing laser welding in the optical axis deviation direction, an irradiation position of the measurement beam S is changed so that the irradiation position of the measurement beam S is moved to a rear side of the center of the optical axis of the laser beam L in the welding direction.
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4.发明公开公开(公告)号：US20240337604A1
公开(公告)日：2024-10-10
申请号：US18745134
申请日：2024-06-17
Inventor： Toru SAKAI , Masashi YOSHIDA , Michio SAKURAI , Daichi HIGASHI
IPC: G01N21/88 , B23K31/12 , B23K37/02 , G01N33/207 , G06T1/00 , G06T7/00 , G06T7/50 , G06V10/20 , G06V10/764
CPC classification number: G01N21/8851 , B23K31/125 , B23K37/0229 , G01N33/207 , G06T1/0014 , G06T7/0006 , G06T7/50 , G06V10/255 , G06V10/764 , G01N2021/8887 , G06T2207/20081 , G06T2207/30136 , G06T2207/30164 , G06V2201/06
Abstract: An appearance inspection apparatus includes a shape measurement unit configured to measure the three-dimensional shape of a weld and a data processor configured to process shape data acquired by the shape measurement unit. The data processor includes a shape data processor configured to correct a resolution of the shape data, a learning data set generator configured to generate a plurality of learning data sets by performing data augmentation on multiple pieces of sample shape data acquired in advance, a determination model generator configured to generate a determination model using the plurality of learning data sets, and a first determination unit configured to determine whether the shape of the weld is good or bad based on the shape data having the corrected resolution and the determination model.
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公开(公告)号：US20240207970A1
公开(公告)日：2024-06-27
申请号：US18599633
申请日：2024-03-08
Inventor： Toru SAKAI , Michio Sakurai
CPC classification number: B23K26/032 , B23K26/0643 , B23K26/0648 , B23K26/082 , B23K26/21 , B23K31/125 , G01B11/22
Abstract: A laser welding device includes: an irradiator configured to overlap laser light and measurement light coaxially with each other and apply the laser light and the measurement light to a weld part, a wavelength of the measurement light being different from a wavelength of the laser light; a measuring instrument configured to repeatedly measure a weld penetration depth of the weld part based on the measurement light that is emitted from the irradiator and reflected on the weld part so as to generate measured values; and a determiner configured to determine the weld penetration depth of the weld part based on: (i) one or more of the measured values; or (ii) an average value of the one or more measured values, the one or more measured values being included within a predetermined range with reference to a greatest side measured value of the measured values.
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Patent Agency Ranking
公开(公告)号：US20210031298A1
公开(公告)日：2021-02-04
申请号：US17066875
申请日：2020-10-09
Inventor： Toru SAKAI , Michio SAKURAI , Toshiyuki MISHIMA , Kenta KUBOTA , Kensuke URATA
Abstract: A plurality of values measured are relatively compared to determine an optical axis deviation direction in which an optical axis of a measurement beam deviates from a laser beam. Then, a first parallel plate and a second parallel plate are rotated to move an irradiation position of the measurement beam so that an optical axis of the measurement beam is substantially coaxial with an optical axis of the laser beam.
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公开(公告)号：US20190126389A1
公开(公告)日：2019-05-02
申请号：US16170831
申请日：2018-10-25
Inventor： Takayuki FUKAE , Takashi URASHIMA , Toshiyuki MISHIMA , Toru SAKAI , Michio SAKURAI
Abstract: The present invention relates to a laser-welding apparatus and a laser-welding method. The laser-welding apparatus of the present invention includes: a laser output section that emits a laser beam toward a weld part of a welding target member; an optical interferometer that measures a weld penetration depth of the weld part based on interference which occurs due to an optical path difference between a measurement beam and a reference beam, the measurement beam having a frequency length different from that of the laser beam and having been emitted to the weld part while being coaxially overlapped with the laser beam, and reflected by the weld part; and a protection optical member disposed on an optical path between the welding target member and the laser output section while being inclined with respect to a plane perpendicular to an optical axis of the measurement beam.
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公开(公告)号：US20210023656A1
公开(公告)日：2021-01-28
申请号：US17066913
申请日：2020-10-09
Inventor： Toru SAKAI , Atsuhiro KAWAMOTO , Junji FUJIWARA , Michio SAKURAI
IPC: B23K26/244 , B23K26/70 , B23K26/10
Abstract: A laser welding device is configured to switch an irradiation position of a measurement beam between a position of a keyhole coaxial with the optical axis of a laser beam and a position of a weld bead behind the center of an optical axis of the laser beam in a welding direction. The laser welding device determines whether there is a gap between an upper metal plate and a lower metal plate based on a measured value of a recess depth measured at the position of the weld bead.
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公开(公告)号：US20210308782A1
公开(公告)日：2021-10-07
申请号：US17353108
申请日：2021-06-21
Inventor： Michio SAKURAI , Narumi ATSUTA , Toru SAKAI , Masashi YOSHIDA
Abstract: A welding system includes a welding apparatus and an appearance inspection apparatus. The appearance inspection apparatus includes: a shape measurement unit that measures the shape of a weld; an image processor that generates image data based on data of the shape; a determination unit that determines whether the shape of the weld is good or bad based on the image data and a determination model; and a feedback unit that extracts shape defect information if the result of the determination by the determination unit is negative. An output controller of the welding apparatus corrects a welding condition for a workpiece based on the shape defect information extracted by the feedback unit.
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公开(公告)号：US20210023655A1
公开(公告)日：2021-01-28
申请号：US17066854
申请日：2020-10-09
Inventor： Michio SAKURAI , Toru SAKAI , Kenta KUBOTA , Takashi URASHIMA , Daichi HIGASHI
IPC: B23K26/21 , B23K26/70 , B23K26/082
Abstract: Laser welding is performed while moving irradiation positions of a laser beam and a measurement beam in forward, rightward, rearward and leftward directions, and the penetration depth of a weld portion is measured during laser welding in each of the directions. Then, a direction in which a value smaller than a reference value is measured is determined to be an optical axis deviation direction, and a correction value is added to the values measured during the laser welding when the laser welding is performed in the optical axis deviation direction.
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