Patents by Inventor Kazumasa Yoshima

Kazumasa Yoshima 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).

  • Patent number: 10152034
    Abstract: A robot control method includes a teaching step, first processing step, modifying step, second processing step, and third processing step. In the modifying step, a third teaching point is changed to a second modified point, a fourth teaching point to a third modified point, and a fifth teaching point to a fourth modified point, based on a difference between a second teaching point and a first modified point. A profile modifying control to change the position of a work tool is applied, using a sensor mounted on the processing advancing direction side of the work tool, in the first processing step and the third processing step. An attitude of the work tool is changed during the second processing step.
    Type: Grant
    Filed: March 26, 2015
    Date of Patent: December 11, 2018
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Takamichi Komatsu, Kazumasa Yoshima, Tatsuya Ikeda
  • Publication number: 20170090431
    Abstract: A robot control method includes a teaching step, first processing step, modifying step, second processing step, and third processing step. In the modifying step, a third teaching point is changed to a second modified point, a fourth teaching point to a third modified point, and a fifth teaching point to a fourth modified point, based on a difference between a second teaching point and a first modified point. A profile modifying control to change the position of a work tool is applied, using a sensor mounted on the processing advancing direction side of the work tool, in the first processing step and the third processing step. An attitude of the work tool is changed during the second processing step.
    Type: Application
    Filed: March 26, 2015
    Publication date: March 30, 2017
    Inventors: TAKAMICHI KOMATSU, KAZUMASA YOSHIMA, TATSUYA IKEDA
  • Patent number: 8933371
    Abstract: A tandem arc welding device in which the welding conditions and a program describing contents of operation are treated as independent to each other. It handles the welding conditions altogether simply as those parameters for the fore-going welding and those parameters for the hind-going welding. By so doing, a program can be produced without taking which of the two welders will become fore-going into consideration. Furthermore, a program and welding conditions thus provided offer superior re-usability and reproducibility to the tandem arc welding.
    Type: Grant
    Filed: February 22, 2007
    Date of Patent: January 13, 2015
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventor: Kazumasa Yoshima
  • Patent number: 8909372
    Abstract: In a control method of a robot system of the present invention, one of two industrial robots is used as a master robot, and the other is used as a slave robot. Data indicating the relation of the relative position and relative attitude between the master robot and the slave robot in welding conditioning work is stored as one set of information. During teaching work, in a state where the master robot and the slave robot exist at any positions, the slave robot is moved with respect to the position of the master robot so as to reproduce the relation of the relative position and relative attitude indicated by the one set of stored information, or the master robot is moved with respect to the position of the slave robot.
    Type: Grant
    Filed: January 31, 2011
    Date of Patent: December 9, 2014
    Assignee: Panasonic Corporation
    Inventor: Kazumasa Yoshima
  • Patent number: 8742291
    Abstract: A method of controlling arc welding, which method shifting the speed of welding operation continuously and mildly. By so doing, a sharp change in the speed of weld wire supply, which is caused as the result of efforts to try to comply with an abrupt change in operation speed, can be moderated. This helps keeping a welding operation under a stable control.
    Type: Grant
    Filed: February 9, 2007
    Date of Patent: June 3, 2014
    Assignee: Panasonic Corporation
    Inventor: Kazumasa Yoshima
  • Publication number: 20120116585
    Abstract: In a control method of a robot system of the present invention, one of two industrial robots is used as a master robot, and the other is used as a slave robot. Data indicating the relation of the relative position and relative attitude between the master robot and the slave robot in welding conditioning work is stored as one set of information. During teaching work, in a state where the master robot and the slave robot exist at any positions, the slave robot is moved with respect to the position of the master robot so as to reproduce the relation of the relative position and relative attitude indicated by the one set of stored information, or the master robot is moved with respect to the position of the slave robot.
    Type: Application
    Filed: January 31, 2011
    Publication date: May 10, 2012
    Applicant: PANASONIC CORPORATION
    Inventor: Kazumasa Yoshima
  • Publication number: 20110301733
    Abstract: The movement of a single electrode by a welding robot system (a) is followed by the movement of a single electrode by another welding robot system (b). By constructing the single electrode of one welding robot system (a) and the single electrode of the another welding robot system (b) to perform welding simultaneously in the same direction on the same welding line, the degrees of freedom of the robots are not restricted, the available welding range becomes wide, and constraints on the posture of the robots are eliminated, compared with a case where a tandem welding-dedicated torch is used.
    Type: Application
    Filed: February 16, 2010
    Publication date: December 8, 2011
    Applicant: Panasonic Corporation
    Inventors: Kazumasa Yoshima, Toshiaki Masai
  • Publication number: 20090308855
    Abstract: A tandem arc welding device in which the welding conditions and a program describing contents of operation are treated as independent to each other. It handles the welding conditions altogether simply as those parameters for the fore-going welding and those parameters for the hind-going welding. By so doing, a program can be produced without taking which of the two welders will become fore-going into consideration. Furthermore, a program and welding conditions thus provided offer superior re-usability and reproducibility to the tandem arc welding.
    Type: Application
    Filed: February 22, 2007
    Publication date: December 17, 2009
    Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
    Inventor: Kazumasa Yoshima
  • Publication number: 20090294428
    Abstract: A method of controlling arc welding, which method shifting the speed of welding operation continuously and mildly. By so doing, a sharp change in the speed of weld wire supply, which is caused as the result of efforts to try to comply with an abrupt change in operation speed, can be moderated. This helps keeping a welding operation under a stable control.
    Type: Application
    Filed: February 9, 2007
    Publication date: December 3, 2009
    Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
    Inventor: Kazumasa Yoshima
  • Patent number: 7241968
    Abstract: The invention includes means for, when welding a crater in a welding termination portion, moving a torch in a direction allowing the whole of the torch to part apart from a molten pool and, therefore, the invention can prevent all welding wires from coming into contact with the molten pool. Also, the invention can check not only the crater-welded welding wire but also all of the remaining welding wires for deposition and, if there is detected a deposited wire, can energize the deposition detected wire again to thereby be able to remove the deposition of the wire.
    Type: Grant
    Filed: April 20, 2005
    Date of Patent: July 10, 2007
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventor: Kazumasa Yoshima
  • Publication number: 20060201921
    Abstract: The invention includes means for, when welding a crater in a welding termination portion, moving a torch in a direction allowing the whole of the torch to part apart from a molten pool and, therefore, the invention can prevent all welding wires from coming into contact with the molten pool. Also, the invention can check not only the crater-welded welding wire but also all of the remaining welding wires for deposition and, if there is detected a deposited wire, can energize the deposition detected wire again to thereby be able to remove the deposition of the wire.
    Type: Application
    Filed: April 20, 2005
    Publication date: September 14, 2006
    Applicant: Matsushita Electric Industrial Co., Ltd.
    Inventor: Kazumasa Yoshima
  • Patent number: 5302802
    Abstract: The present invention belongs to the field of techniques related to a laser robot and a method of controlling the same, particularly for performing weaving of a laser beam easily with high accuracy without the provision of a vibrating condenser lens at the leading edge of an arm.To solve the problems, in the laser robot (RB) of the present invention, a first inclined mirror (41a) is mounted on a motor (42a) inclined at a predetermined angle from a plane perpendicular to the direction of the rotation axis of a rotor shaft. Similarly, a second inclined mirror (41b) is mounted on a motor (42b) inclined at a predetermined angle. The laser beam (LB) emitted from a laser oscillator (8) is reflected in series by the first and second inclined mirrors (41a, 41b) and is subsequently propagated in the laser robot (RB) to be directed toward workpieces from the tip of a torch (7).
    Type: Grant
    Filed: February 5, 1992
    Date of Patent: April 12, 1994
    Assignee: Shin Meiwa Industry Co., Ltd.
    Inventors: Shigeki Fujinaga, Kiyoshi Takeuchi, Masakazu Kobayashi, Shigeki Ochi, Junko Momosaki, Eizo Tsuda, Shinsuke Inoue, Kazumasa Yoshima
  • Patent number: 5206474
    Abstract: The present invention is directed to a weld line profile control method in weaving welding. According to this method, a welding current and/or a welding voltage in a position close to a weaving endpoint is evaluated as a reference value. A welding current and/or a welding voltage in the vicinity of an n-th (n.gtoreq.2) weaving endpoint are actually measured respectively, and thereafter an (n+1)-th weaving endpoint position is evaluated on the basis of difference between the actually measured value and the reference value. Further, welding from the n-th weaving endpoint to an (n+1)-th weaving endpoint is executed on the basis of the positional data. As the result, neither too much nor too little weaving welding can be performed.
    Type: Grant
    Filed: April 4, 1991
    Date of Patent: April 27, 1993
    Assignee: Shin Meiwa Industry Co., Ltd.
    Inventors: Hisahiro Fukuoka, Hirotoshi Watanabe, Shunji Iwaki, Kazumasa Yoshima