公开(公告)号：US10384307B2

公开(公告)日：2019-08-20

申请号：US15326400

申请日：2015-07-09

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Noriyuki Matsuoka ,  Yasushi Mukai ,  Atsuhiro Kawamoto ,  Junji Fujiwara

IPC: B23K26/06 ,  B23K26/08 ,  B23K26/10 ,  G05B19/19 ,  B23K101/00 ,  B23K26/064

Abstract: A laser machining system includes a laser oscillator, a laser machining head, and a reflection unit. The laser oscillator outputs laser light. The laser machining head, which includes a first optical member for collecting the laser light, emits the collected laser light. The reflection unit, which includes a reflective member for reflecting the laser light emitted from the laser machining head, radiates the reflected laser light onto a work.

公开(公告)号：US09889522B2

公开(公告)日：2018-02-13

申请号：US15118858

申请日：2015-02-24

Applicant: Panasonic Intellectual Property Management Co., Ltd

Inventor： Yiheng Kung ,  Yasushi Mukai ,  Wataru Takahashi

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

CPC classification number: B23K26/0648 ,  B23K26/38 ,  B23K26/703 ,  B23K26/706

Abstract: The laser processing head of the present disclosure includes a collimation lens, a focus lens, a first parallel plate, a first drive unit, a second parallel plate, and a second drive unit. The collimation lens collimates a laser beam having a first optical axis, and the focus lens condenses the collimated laser beam. The first parallel plate shifts the optical axis of the condensed laser beam to a second optical axis. The first drive unit rotates the first parallel plate around a first rotation axis. The second parallel plate shifts the optical axis of the laser beam shifted to the second optical axis, to a third optical axis. The second drive unit rotates the second parallel plate around a second rotation axis. The direction of the first rotation axis and the direction of the second rotation axis are identical.

公开(公告)号：US09776273B2

公开(公告)日：2017-10-03

申请号：US14522909

申请日：2014-10-24

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Junji Fujiwara ,  Yasushi Mukai ,  Atsuhiro Kawamoto

IPC: B23K9/095 ,  B23K9/073 ,  B23K9/12 ,  B23K9/09

CPC classification number: B23K9/095 ,  B23K9/073 ,  B23K9/0732 ,  B23K9/09 ,  B23K9/124

Abstract: An arc-welding method in welding by repeating a short circuit and an arc. When the sign of opening of the short circuit is detected, the welding current is reduced from a first current value at the detection of the sign to a second current value, which is lower than the first current value. When the opening of the short circuit is detected, a pulse current having a peak value higher than the first current value is supplied at a plurality of times in the arc period. This suppresses porosities and spatters when galvanized steel sheets are welded.

公开(公告)号：US10155285B2

公开(公告)日：2018-12-18

申请号：US15107347

申请日：2014-12-25

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Junji Fujiwara ,  Yasushi Mukai ,  Atsuhiro Kawamoto ,  Tatsuyuki Nakagawa ,  Noriyuki Matsuoka

IPC: B23K26/322 ,  B23K26/00 ,  B23K26/244 ,  B25J11/00 ,  B23K26/22 ,  B23K26/082 ,  B23K101/00 ,  B23K101/34 ,  B23K103/04 ,  B23K103/08

Abstract: A laser welding method of the present disclosure includes a first step, a second step, and a third step. In the first step, a first workpiece and a second workpiece are stacked on each other. Each of the first workpiece and the second workpiece has a surface coated with a first material and is made of a second material, which is different from the first material. In the second step, a first region in which the first workpiece and the second workpiece are stacked on each other is irradiated with a laser beam so that the laser beam penetrates both the first workpiece and the second workpiece. In the third step, a second region including the first region is irradiated with a laser beam in a spiral fashion.

公开(公告)号：US10471540B2

公开(公告)日：2019-11-12

申请号：US14891215

申请日：2015-02-24

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Noriyuki Matsuoka ,  Yasushi Mukai ,  Atsuhiro Kawamoto ,  Junji Fujiwara ,  Tatsuyuki Nakagawa

IPC: B23K26/24 ,  B23K26/082 ,  B23K26/06 ,  B23K26/08 ,  B23K26/322 ,  B23K101/34 ,  B23K103/04 ,  B23K103/08

Abstract: A laser welding method of the present disclosure includes the step of irradiating a workpiece with a laser beam in a helical shape along a weld part of the workpiece. The helical shape is a combination of a circular trajectory in which a laser beam is moved circularly, and a movement trajectory in which the laser beam is moved in a proceeding direction along the weld part. Furthermore, first energy of the laser beam moving so as to have a component of the proceeding direction in the circular trajectory is larger than second energy of the laser beam moving so as to have a component of an opposite direction to the proceeding direction in the circular trajectory.

公开(公告)号：US10189116B2

公开(公告)日：2019-01-29

申请号：US15023389

申请日：2015-03-09

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Wataru Takahashi ,  Yasushi Mukai ,  Yiheng Kung

IPC: B23K26/14 ,  B23K26/064 ,  B23K26/142 ,  B23K26/382

Abstract: A laser machining head includes a collimation lens, a focusing lens, and a nozzle unit. The nozzle unit includes a protective member, an inner nozzle, an outer nozzle, a nozzle holding section, and an orifice. The outer nozzle is disposed outside the inner nozzle and the nozzle holding section holds the inner nozzle and the outer nozzle. The orifice is in contact with the inner nozzle and is interposed between the nozzle holding section and the outer nozzle. The nozzle holding section has a first gas path connecting the air supply port disposed in the nozzle holding section and the orifice. The orifice has a third gas path for connecting a second gas path disposed between the inner nozzle and the outer nozzle, and the first gas path. In the vicinity of the tip of the nozzle unit, an opening connected to the second gas path is disposed.

公开(公告)号：US10105784B2

公开(公告)日：2018-10-23

申请号：US14220501

申请日：2014-03-20

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Tatsuya Ikeda ,  Hisashi Kataoka ,  Tetsuya Takayama ,  Yasushi Mukai

IPC: B23K9/12 ,  B23K9/127 ,  B23K9/025

Abstract: The present invention is a weld line-detecting method when fillet welding by an industrial robot including a welding torch is taught. The welding torch on which an angle sensor having a contactor is attached is moved toward a welding object, angle information obtained when the contactor is in contact with the welding object is transmitted to the industrial robot, and the industrial robot moves the welding torch based on the angle information so that the angle of the contactor becomes zero. These operations are repeated, and the welding torch is moved toward a fillet part along the surface of the welding object. When the contactor arrives at the fillet part, a signal indicating that the contactor is pressed in the axial direction of the contactor is transmitted to the industrial robot. The industrial robot detects that the contactor arrives at the position to be welded on the weld line.