Patents by Inventor Toshiyuki Mishima
Toshiyuki Mishima has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11511370Abstract: 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.Type: GrantFiled: October 9, 2020Date of Patent: November 29, 2022Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Michio Sakurai, Toshiyuki Mishima, Toru Sakai, Kenta Kubota, Kensuke Urata
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Publication number: 20210031298Abstract: 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.Type: ApplicationFiled: October 9, 2020Publication date: February 4, 2021Inventors: Toru SAKAI, Michio SAKURAI, Toshiyuki MISHIMA, Kenta KUBOTA, Kensuke URATA
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Publication number: 20210023651Abstract: 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.Type: ApplicationFiled: October 9, 2020Publication date: January 28, 2021Inventors: Michio SAKURAI, Toshiyuki MISHIMA, Toru SAKAI, Kenta KUBOTA, Kensuke URATA
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Patent number: 10688586Abstract: A welding torch includes first to third wire passages, a wire detection space, and a wire detecting device. The first wire passage has a first wire inlet port allowing a first welding wire to enter thereto and a first wire outlet port allowing the first welding wire to be output therefrom. The second wire passage has a second wire inlet port allowing a second welding wire to enter thereto and a second wire outlet port allowing the second welding wire to be output therefrom. The third wire passage has a third wire inlet port allowing a portion of the first welding wire output from the first wire outlet port and a portion of the second welding wire output from the second wire outlet port to enter thereto, and a third wire outlet port allowing the portion of the first welding wire and the portion of the second welding wire to be output therefrom. The wire detection space is connected to the first and second wire outlet ports and the third wire inlet port.Type: GrantFiled: September 20, 2016Date of Patent: June 23, 2020Assignee: Panasonic Intellectual Property Management Co., Ltd.Inventor: Toshiyuki Mishima
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Publication number: 20190126389Abstract: 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.Type: ApplicationFiled: October 25, 2018Publication date: May 2, 2019Applicant: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Takayuki FUKAE, Takashi URASHIMA, Toshiyuki MISHIMA, Toru SAKAI, Michio SAKURAI
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Publication number: 20180200825Abstract: A welding torch includes first to third wire passages, a wire detection space, and a wire detecting device. The first wire passage has a first wire inlet port allowing a first welding wire to enter thereto and a first wire outlet port allowing the first welding wire to be output therefrom. The second wire passage has a second wire inlet port allowing a second welding wire to enter thereto and a second wire outlet port allowing the second welding wire to be output therefrom. The third wire passage has a third wire inlet port allowing a portion of the first welding wire output from the first wire outlet port and a portion of the second welding wire output from the second wire outlet port to enter thereto, and a third wire outlet port allowing the portion of the first welding wire and the portion of the second welding wire to be output therefrom. The wire detection space is connected to the first and second wire outlet ports and the third wire inlet port.Type: ApplicationFiled: September 20, 2016Publication date: July 19, 2018Inventor: TOSHIYUKI MISHIMA
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Patent number: 8841581Abstract: If a short circuit does not occur during deceleration of a wire feed speed in forward feed of a welding wire before the wire feed speed reaches a predetermined wire feed speed, a cyclic change is stopped and the wire feed speed is constantly controlled at the first feed speed. If a short circuit occurs during forward feed at the first feed speed, deceleration from the first feed speed starts, and the cyclic change is resumed for welding. This achieves uniform weld bead without increasing spatters even if any external disturbance such as change of distance between a tip and base material occurs.Type: GrantFiled: November 28, 2012Date of Patent: September 23, 2014Assignee: Panasonic CorporationInventors: Atsuhiro Kawamoto, Yasushi Mukai, Junji Fujiwara, Toshiyuki Mishima, Masaru Kowa
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Patent number: 8809735Abstract: If a short circuit does not occur during deceleration of a wire feed speed in forward feed of a welding wire before the wire feed speed reaches a predetermined wire feed speed, a cyclic change is stopped and the wire feed speed is constantly controlled at the first feed speed. If a short circuit occurs during forward feed at the first feed speed, deceleration from the first feed speed starts, and the cyclic change is resumed for welding. This achieves uniform weld bead without increasing spatters even if any external disturbance such as change of distance between a tip and base material occurs.Type: GrantFiled: November 28, 2012Date of Patent: August 19, 2014Assignee: Panasonic CorporationInventors: Atsuhiro Kawamoto, Yasushi Mukai, Junji Fujiwara, Toshiyuki Mishima, Masaru Kowa
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Patent number: 8723080Abstract: An arc welding control method for carrying out welding by generating an arc between a wire and a base material. The wire is fed at wire feed speed (Wf) of periodically repeating forward feeding and reverse feeding with predetermined frequency and amplitude from time point (100) at which start of the welding is instructed, or from a certain time point (101) after the start of the welding is instructed, and then the wire feed speed is changed to a constant speed. Since the wire feed speed is controlled by periodically repeating forward feeding and reverse feeding at the arc start, short-circuit can be opened regardless of the electromagnetic pinch force, and spatters, which are generated at the early stage of the arc start because a molten pool is not preset, can be reduced.Type: GrantFiled: July 6, 2010Date of Patent: May 13, 2014Assignee: Panasonic CorporationInventors: Atsuhiro Kawamoto, Yasushi Mukai, Junji Fujiwara, Masaru Kowa, Toshiyuki Mishima
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Patent number: 8513568Abstract: If a short circuit does not occur during deceleration of a wire feed speed in forward feed of a welding wire before the wire feed speed reaches a predetermined wire feed speed, a cyclic change is stopped and the wire feed speed is constantly controlled at the first feed speed. If a short circuit occurs during forward feed at the first feed speed, deceleration from the first feed speed starts, and the cyclic change is resumed for welding. This achieves uniform weld bead without increasing spatters even if any external disturbance such as change of distance between a tip and base material occurs.Type: GrantFiled: June 16, 2010Date of Patent: August 20, 2013Assignee: Panasonic CorporationInventors: Atsuhiro Kawamoto, Yasushi Mukai, Junji Fujiwara, Toshiyuki Mishima, Masaru Kowa
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Publication number: 20120097654Abstract: An arc welding control method for carrying out welding by generating an arc between a wire and a base material. The wire is fed at wire feed speed (Wf) of periodically repeating forward feeding and reverse feeding with predetermined frequency and amplitude from time point (100) at which start of the welding is instructed, or from a certain time point (101) after the start of the welding is instructed, and then the wire feed speed is changed to a constant speed. Since the wire feed speed is controlled by periodically repeating forward feeding and reverse feeding at the arc start, short-circuit can be opened regardless of the electromagnetic pinch force, and spatters, which are generated at the early stage of the arc start because a molten pool is not preset, can be reduced.Type: ApplicationFiled: July 6, 2010Publication date: April 26, 2012Applicant: Panasonic CorporationInventors: Atsuhiro Kawamoto, Yasushi Mukai, Junji Fujiwara, Masaru Kowa, Toshiyuki Mishima
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Publication number: 20120074114Abstract: If a short circuit does not occur during deceleration of a wire feed speed in forward feed of a welding wire before the wire feed speed reaches a predetermined wire feed speed, a cyclic change is stopped and the wire feed speed is constantly controlled at the first feed speed. If a short circuit occurs during forward feed at the first feed speed, deceleration from the first feed speed starts, and the cyclic change is resumed for welding. This achieves uniform weld bead without increasing spatters even if any external disturbance such as change of distance between a tip and base material occurs.Type: ApplicationFiled: June 16, 2010Publication date: March 29, 2012Applicant: Panasonic CorporationInventors: Atsuhiro Kawamoto, Yasushi Mukai, Junji Fujiwara, Toshiyuki Mishima, Masaru Kowa
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Publication number: 20100230395Abstract: It comprises cylindrical feeder collet (6) formed with a slit portion at a front end thereof for feeding power to a welding wire internally set through; collet case (7) for storing feeder collet (6) therein, having an abutment on which the end of feeder collet (6) is abutted; flexible inner tube (4) for leading the welding wire to feeder collet (6); torch body (3) with inner tube (4) inserted therein and collet case (7) detachably disposed at the front end thereof; and spring (5) for pressurizing feeder collet (6) toward the front end of the welding wire, wherein there is provided a taper surface on at least any one of the front end of feeder collet (6) and the abutment of collet case (7). Thus, it is structurally simple and applicable for a curved torch.Type: ApplicationFiled: April 14, 2008Publication date: September 16, 2010Applicant: Matsushita Electric Industrial Co., Ltd.Inventors: Yasushi Mukai, Toshiyuki Mishima
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Patent number: 7627396Abstract: There is provided an industrial robot which comprises a manipulator having a tool at the tip end, a robot control unit for controlling the manipulator, and a primary teaching device and subsidiary teaching device for controlling the manipulator through the robot control unit, wherein operation capable of being conducted by the subsidiary teaching device is restricted as compared with operation capable of being conducted by the primary teaching device. By realizing the industrial robot, it is possible to prevent a production line worker from executing a function of the robot which is originally to be executed by a supervisor.Type: GrantFiled: November 5, 2004Date of Patent: December 1, 2009Assignee: Panasonic CorporationInventors: Tatsuya Ikeda, Kunitoshi Morita, Toshiyuki Mishima
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Patent number: 7378613Abstract: A robot main body is provided with a protection cover. The robot main body can be swung by a rotary pipe shaft holding a wire feed device and including a hollow portion and is structured such that a connecting cable and/or a gas hose are guided through the hollow portion of the rotary pipe shaft and are then guided through the forearm portion and base portion thereof. The protection cover covers the portions of the connecting cable and/or gas hose ranging from the connecting portion of the wire feed device and connecting cable and/or gas hose to the rotary pipe shaft.Type: GrantFiled: June 9, 2005Date of Patent: May 27, 2008Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Toshiyuki Mishima, Yaushi Mukai, Wataru Takahashi, Takashi Nagai, Takayasu Ohara
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Patent number: 7378612Abstract: Accommodating a welding control cable for connecting a welding power supply and a robot main body and a wire feeder sensor cable connected to a wire feeder encoder in a robot main body driving power cable connecting the robot main body and the robot controller of an arc welding robot. This configuration saves the number of cables to be connected thus improving the installation workability in system deployment on site as well as reducing the overall cost.Type: GrantFiled: May 23, 2005Date of Patent: May 27, 2008Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Wataru Takahashi, Yasushi Mukai, Kazunori Matsumoto, Toshiyuki Mishima, Takashi Nagai
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Publication number: 20070017911Abstract: The invention comprises a robot main body and a protection cover. The robot main body can be swung by a rotary pipe shaft holding a wire feed device and including a hollow portion and is structured such that a connecting cable and/or a gas hose are guided through the hollow portion of the rotary pipe shaft and are then guided through the forearm portion and base portion thereof. The protection cover covers the portions of the connecting cable and/or gas hose ranging from the connecting portion of the wire feed device and connecting cable and/or gas hose to the rotary pipe shaft.Type: ApplicationFiled: June 9, 2005Publication date: January 25, 2007Applicant: Matsushita Electric Industrial Co., Ltd.Inventors: Toshiyuki Mishima, Yasushi Mukai, Wataru Takahashi, Takashi Nagai, Takayasu Ohara
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Publication number: 20060278621Abstract: Accommodating a welding control cable for connecting a welding power supply and a robot main body and a wire feeder sensor cable connected to a wire feeder encoder in a robot main body driving power cable connecting the robot main body and the robot controller of an arc welding robot. This configuration saves the number the number of cables to be connected thus improving the installation workability in system deployment on site as well as reducing the overall cost.Type: ApplicationFiled: May 23, 2005Publication date: December 14, 2006Applicant: Matsushita Electric Industrial Co., Ltd.Inventors: Wataru Takahashi, Yasushi Mukai, Kazunori Matsumoto, Toshiyuki Mishima, Takashi Nagai
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Publication number: 20060182601Abstract: In case a robot performs work inside the box-shaped workpiece held on a jig 16, it is possible to avoid interference with an interference point 18 in a curved recessed space of the arm by curving the first arm of the robot 9 in a direction of rotation with respect to a swing part 4 and in a direction opposite to the interior angle formed by the first arm 9 and the second arm 12. This allows work to be done as far as the work bottom 19. As a result, it is possible to reserve a wider work area 20 inside the workpiece than the work area inside the workpiece of a related art robot.Type: ApplicationFiled: June 9, 2005Publication date: August 17, 2006Inventors: Takashi Nagai, Yasushi Mukai, Wataru Takahashi, Toshiyuki Mishima, Takayasu Ohara
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Publication number: 20060106471Abstract: There is provided an industrial robot which comprises a manipulator having a tool at the tip end, a robot control unit for controlling the manipulator, and a primary teaching device and subsidiary teaching device for controlling the manipulator through the robot control unit, wherein operation capable of being conducted by the subsidiary teaching device is restricted as compared with operation capable of being conducted by the primary teaching device. By realizing the industrial robot, it is possible to prevent a production line worker from executing a function of the robot which is originally to be executed by a supervisor.Type: ApplicationFiled: November 5, 2004Publication date: May 18, 2006Applicant: Matsushita Electric Industrial Co., LtdInventors: Tatsuya Ikeda, Kunitoshi Morita, Toshiyuki Mishima