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公开(公告)号：US12076817B2
公开(公告)日：2024-09-03
申请号：US17066913
申请日：2020-10-09
Inventor： Toru Sakai , Atsuhiro Kawamoto , Junji Fujiwara , Michio Sakurai
IPC: B23K26/244 , B23K26/10 , B23K26/70
CPC classification number: B23K26/244 , B23K26/103 , B23K26/705
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：US12017299B2
公开(公告)日：2024-06-25
申请号：US17066854
申请日：2020-10-09
Inventor： Michio Sakurai , Toru Sakai , Kenta Kubota , Takashi Urashima , Daichi Higashi
IPC: B23K26/21 , B23K26/082 , B23K26/70
CPC classification number: B23K26/21 , B23K26/082 , B23K26/705
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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Patent Agency Ranking
公开(公告)号：US11999008B2
公开(公告)日：2024-06-04
申请号：US16984261
申请日：2020-08-04
Inventor： Toru Sakai , Michio Sakurai , Takashi Urashima , Daichi Higashi
CPC classification number: B23K26/032 , B23K26/0643 , B23K26/0648 , B23K26/082 , B23K26/21 , B23K31/125 , G01B11/22
Abstract: A laser welding device (10) for welding a weld part (35) with laser light (L) includes: a laser emitting head (20) overlapping the laser light (L) and a measurement light (S) coaxially with each other and applying the laser light (L) and the measurement light (S) to the weld part (35), the measurement light (S) having a wavelength different from a wavelength of the laser light (L); a first parallel plane plate and a second parallel plane plate, changing an irradiation position of the measurement light (S) such that the irradiation position orbitally move around a center of rotation that moves on a predetermined welding path in a radius of rotation that is smaller than ½ of a spot diameter of the laser light (L); a measuring instrument (14) repeatedly measuring a weld penetration depth of the weld part (35) based on the measurement light (S) that is emitted from the laser emitting head (20) and is reflected on the weld part (35) while the measurement light (S) is being orbitally moved; and a determiner (17) determining the weld penetration depth of the weld part (35) using a plurality of measured values of the weld penetration depth, the plurality of measured values being measured by the measuring instrument (14) within a fixed time period while shifting a start time point of the fixed time period.
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公开(公告)号：US11964339B2
公开(公告)日：2024-04-23
申请号：US16984271
申请日：2020-08-04
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 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 plurality of measured values.
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公开(公告)号：US11872657B2
公开(公告)日：2024-01-16
申请号：US17353108
申请日：2021-06-21
Inventor： Michio Sakurai , Narumi Atsuta , Toru Sakai , Masashi Yoshida
CPC classification number: B23K9/0956 , G01B11/24 , G01N21/8803 , G01N21/95
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：US11511370B2
公开(公告)日：2022-11-29
申请号：US17066823
申请日：2020-10-09
Inventor： Michio Sakurai , Toshiyuki Mishima , Toru Sakai , Kenta Kubota , Kensuke Urata
IPC: B23K26/03 , B23K26/04 , B23K26/06 , B23K26/042 , B23K26/044 , G01B11/02
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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公开(公告)号：US11536305B2
公开(公告)日：2022-12-27
申请号：US16479963
申请日：2018-01-23
Inventor： Junji Fujiwara , Atsuhiro Kawamoto , Tatsuyuki Nakagawa , Toru Sakai
Abstract: A junction structure includes a first material that is a metallic material, a third material that is a metallic material and is weldable to the first material, and a second material which is a nonferrous metallic material or a nonmetallic material. The second material is sandwiched and fixed between the first material and the third material by lap joining. At least one of the first material or the third material has a weld zone where the first material and the third material are melted and joined together, and at least one exhaust groove or at least one exhaust hole around the weld zone. The at least one exhaust groove or the at least one exhaust hole penetrates a thickness of the at least one of the first material or the third material.
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