Patents by Inventor Yasuhide Nagao
Yasuhide Nagao 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: 7703659Abstract: In the friction stir joining apparatus of the present invention, a rotation control unit variably controls a rotational speed of a rotor; and a straight movement control unit controls a straight movement of the rotor so as to control a pressure applied by the rotor to the object. The tip portion of the rotating rotor is pressed against a workpiece, thus spot joining is executed. The apparatus can execute frictional stirring joining without practical trouble under simple control.Type: GrantFiled: October 23, 2008Date of Patent: April 27, 2010Assignee: Kawasaki Jukogyo Kabushiki KaishaInventors: Hajime Kashiki, Yasuhide Nagao, Masayuki Inuzuka, Takehiro Hyoue
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Patent number: 7665650Abstract: In the friction stir joining apparatus of the present invention, a rotation control unit variably controls a rotational speed of a rotor; and a straight movement control unit controls a straight movement of the rotor so as to control a pressure applied by the rotor to the object. The tip portion of the rotating rotor is pressed against a workpiece, thus spot joining is executed. The apparatus can execute frictional stirring joining without practical trouble under simple control.Type: GrantFiled: October 23, 2008Date of Patent: February 23, 2010Assignee: Kawasaki Jukogyo Kabushiki KaishaInventors: Hajime Kashiki, Yasuhide Nagao, Masayuki Inuzuka, Takehiro Hyoue
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Patent number: 7575145Abstract: A friction stir welding apparatus capable of stably applying a pressure force without enlarging the apparatus, and a robot having thereof are provided. A rotating tool is provided with a rotational shaft and a hollow surrounding shaft is provided to surround the rotational shaft. The rotational shaft is movable along an axis-of-rotation and is rotated by a rotation drive motor about the axis-of-rotation. The surrounding shaft is rotatably supported by a main frame and an outer threaded portion is formed around the outer peripheral thereof to be threadedly engaged with a nut member. The rotating tool is rotatably supported by a header, and the header and the nut member are coupled together through a bracket. Therefore, when the surrounding shaft is rotated about the axis-of-rotation by the linear movement motor, the rotating tool is linearly moved through the nut member, the bracket and the header, and can apply a pressure force against work pieces.Type: GrantFiled: March 19, 2008Date of Patent: August 18, 2009Assignee: Kawasaki Jukogyo Kabushiki KaishaInventor: Yasuhide Nagao
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Publication number: 20090057377Abstract: In the friction stir joining apparatus of the present invention, a rotation control unit variably controls a rotational speed of a rotor; and a straight movement control unit controls a straight movement of the rotor so as to control a pressure applied by the rotor to the object. The tip portion of the rotating rotor is pressed against a workpiece, thus spot joining is executed. The apparatus can execute frictional stirring joining without practical trouble under simple control.Type: ApplicationFiled: October 23, 2008Publication date: March 5, 2009Applicant: KAWASAKI JUKOGYO KABUSHIKI KAISHAInventors: Hajime Kashiki, Yasuhide Nagao, Masayuki Inuzuka, Takehiro Hyoue
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Publication number: 20090057371Abstract: In the friction stir joining apparatus of the present invention, a rotation control unit variably controls a rotational speed of a rotor; and a straight movement control unit controls a straight movement of the rotor so as to control a pressure applied by the rotor to the object. The tip portion of the rotating rotor is pressed against a workpiece, thus spot joining is executed. The apparatus can execute frictional stirring joining without practical trouble under simple control.Type: ApplicationFiled: October 23, 2008Publication date: March 5, 2009Applicant: KAWASAKI JUKOGYO KABUSHIKI KAISHAInventors: Hajime Kashiki, Yasuhide Nagao, Masayuki Inuzuka, Takehiro Hyoue
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Patent number: 7455210Abstract: A processing operation control method controls a processing operation in which a rotary tool 1 is rotated by a rotative drive unit 51, and presses the rotating rotary tool 1 is pressed by a pressing unit 52 to force the rotating rotary tool 1 into workpieces W1 and W2. Load placed on the rotary tool 1 during the processing operation is measured, an optimum rotating speed at which the rotary tool 1 is to be rotated and/or an optimum pressure to be applied to the rotary tool 1 for processing the workpieces W1 and W2 is determined on the basis of the measured load placed on the rotary tool 1. The rotative drive unit 51 and/or the pressing unit 52 are controlled on the basis of the optimum rotating speed at which the rotary tool 1 is to be rotated and/or the optimum pressure to be applied to the rotary tool 1.Type: GrantFiled: March 29, 2002Date of Patent: November 25, 2008Assignee: Kawasaki Jukogyo Kabushiki KaishiInventors: Yasuhide Nagao, Hajime Kashiki, Kotoyoshi Murakami
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Publication number: 20080173695Abstract: A friction stir welding apparatus capable of stably applying a pressure force without enlarging the apparatus, and a robot having thereof are provided. A rotating tool is provided with a rotational shaft and a hollow surrounding shaft is provided to surround the rotational shaft. The rotational shaft is movable along an axis-of-rotation and is rotated by a rotation drive motor about the axis-of-rotation. The surrounding shaft is rotatably supported by a main frame and an outer threaded portion is formed around the outer peripheral thereof to be threadedly engaged with a nut member. The rotating tool is rotatably supported by a header, and the header and the nut member are coupled together through a bracket. Therefore, when the surrounding shaft is rotated about the axis-of-rotation by the linear movement motor, the rotating tool is linearly moved through the nut member, the bracket and the header, and can apply a pressure force against work pieces.Type: ApplicationFiled: March 19, 2008Publication date: July 24, 2008Applicant: KAWASAKI JUKOGYO KABUSHIKI KAISHAInventor: Yasuhide Nagao
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Patent number: 7370784Abstract: A friction stir welding apparatus capable of stably applying a pressure force without enlarging the apparatus, and a robot having thereof are provided. A rotating tool (22) is provided with a rotational shaft (26) and a hollow surrounding shaft (27) is provided to surround the rotational shaft (26). The rotational shaft (26) is movable along an axis-of-rotation (L) and is rotated by a rotation drive motor (25) about the axis-of-rotation (L). The surrounding shaft (27) is rotatably supported by a main frame (29) and an outer threaded portion is formed around the outer peripheral thereof to be threadedly engaged with a nut member 53. The rotating tool (22) is rotatably supported by a header (40), and the header (40) and the nut member 53 are coupled together through a bracket (70).Type: GrantFiled: October 17, 2002Date of Patent: May 13, 2008Assignee: Kawasaki Jukogyo Kabushiki KaishaInventor: Yasuhide Nagao
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Patent number: 6832713Abstract: A spot joining device comprises a joining tool, an induction motor for rotating the joining tool, a servo motor for vertically moving the joining tool along an axis of the joining tool, and a receiving member placed opposite to the joining tool. The joining tool includes a short-column shaped shoulder and a pin protruded downwardly along the axis from a central portion of a lower face of the shoulder at a tip end portion thereof. Two works such as aluminum alloy plates are lapped and placed on a receiving member. When the joining tool is rotated and moved downwardly, a joint spot of the works is heated and softened due to friction heat generated by the rotating pin. Thereby, plastic flow occurs in the vicinity of the joint spot. The vicinity of the joint spot is stirred and the works are fused at the joint spot. Thus, the works are spot-joined.Type: GrantFiled: May 2, 2001Date of Patent: December 21, 2004Assignee: Kawasaki Jukogyo Kabushiki KaishaInventors: Yuzo Kano, Masayuki Inuzuka, Seiichiro Yamashita, Yasumasa Nakashima, Yasuhide Nagao, Tomoyuki Iwashita
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Publication number: 20040195290Abstract: A friction stir welding apparatus capable of stably applying a pressure force without enlarging the apparatus, and a robot having thereof are provided. A rotating tool (22) is provided with a rotational shaft (26) and a hollow surrounding shaft (27) is provided to surround the rotational shaft (26). The rotational shaft (26) is movable along an axis-of-rotation (L) and is rotated by a rotation drive motor (25) about the axis-of-rotation (L). The surrounding shaft (27) is rotatably supported by a main frame (29) and an outer threaded portion is formed around the outer peripheral thereof to be threadedly engaged with a nut member (52). The rotating tool (22) is rotatably supported by a header (40), and the header (40) and the nut member (52) are coupled together through a bracket (70).Type: ApplicationFiled: May 10, 2004Publication date: October 7, 2004Inventor: Yasuhide Nagao
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Publication number: 20040112939Abstract: A processing operation control method controls a processing operation in which a rotary tool 1 is rotated by a rotative drive unit 51, and presses the rotating rotary tool 1 is pressed by a pressing unit 52 to force the rotating rotary tool 1 into workpieces W1 and W2. Load placed on the rotary tool 1 during the processing operation is measured, an optimum rotating speed at which the rotary tool 1 is to be rotated and/or an optimum pressure to be applied to the rotary tool 1 for processing the workpieces W1 and W2 is determined on the basis of the measured load placed on the rotary tool 1. The rotative drive unit 51 and/or the pressing unit 52 are controlled on the basis of the optimum rotating speed at which the rotary tool 1 is to be rotated and/or the optimum pressure to be applied to the rotary tool 1.Type: ApplicationFiled: September 17, 2003Publication date: June 17, 2004Inventors: Yasuhide Nagao, Hajime Kashiki, Kotoyoshi Murakami
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Publication number: 20030029903Abstract: In the friction stir joining apparatus of the present invention, a rotation control unit variably controls a rotational speed of a rotor; and a straight movement control unit controls a straight movement of the rotor so as to control a pressure applied by the rotor to the object. The tip portion of the rotating rotor is pressed against a workpiece, thus spot joining is executed. The apparatus can execute frictional stirring joining without practical trouble under simple control.Type: ApplicationFiled: July 29, 2002Publication date: February 13, 2003Applicant: Kawasaki Jukogyo Kabushiki KaishaInventors: Hajime Kashiki, Yasuhide Nagao, Masayuki Inuzuka, Takehiro Hyoue
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Publication number: 20010045447Abstract: A spot joining device comprises a joining tool, an induction motor for rotating the joining tool, a servo motor for vertically moving the joining tool along an axis of the joining tool, and a receiving member placed opposite to the joining tool. The joining tool includes a short-column shaped shoulder and a pin protruded downwardly along the axis from a central portion of a lower face of the shoulder at a tip end portion thereof. Two works such as aluminum alloy plates are lapped and placed on a receiving member. When the joining tool is rotated and moved downwardly, a joint spot of the works is heated and softened due to friction heat generated by the rotating pin. Thereby, plastic flow occurs in the vicinity of the joint spot. The vicinity of the joint spot is stirred and the works are fused at the joint spot. Thus, the works are spot-joined.Type: ApplicationFiled: May 2, 2001Publication date: November 29, 2001Inventors: Yuzo Kano, Masayuki Inuzuka, Seiichiro Yamashita, Yasumasa Nakashima, Yasuhide Nagao, Tomoyuki Iwashita