Patents by Inventor Tokuji Okumura
Tokuji Okumura 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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Publication number: 20220126387Abstract: The present invention pertains to a brazing method and a brazing apparatus. This brazing method comprises: a brazing material supply step for supplying a brazing material to a to-be-welded part; and a laser irradiation step for irradiating the brazing material having been supplied to the to-be-welded part with a laser beam while moving the laser beam along a brazing direction to form a welding bead. In the laser irradiation step, a gas is injected toward an area to be injected with gas, which is an area encompassing the welding bead located rearward of a laser-irradiated portion of the brazing material in the brazing direction, from above said area or from a front side of said area in the brazing direction.Type: ApplicationFiled: January 7, 2020Publication date: April 28, 2022Inventors: Tokuji Okumura, Mitsugu Kaneko, Hiroki Fujiuchi, Akira Goto, Hitoshi Arai
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Patent number: 9376737Abstract: Provided is a method for producing a zinc alloy capable of obtaining a Zn—Si alloy having a uniform composition. Metal Zn is melted in a crucible (2) provided in a heating furnace (1) to obtain a Zn molten metal (4). Floating of a metal Si powder (6) added to the Zn molten metal (4) is suppressed by a floating suppressing member (5). Heating is performed while a liquid surface of the Zn molten metal (4) is coated with a carbonaceous material (9), thereby melting the metal Si powder (6). The suppression of the floating of the metal Si powder (6) is released to allow the melted Si to be dispersed in the Zn molten metal (4), thereby obtaining a Zn—Si alloy molten metal (11). A copper casting mold (12) is filled with the Zn—Si alloy molten metal (11), and is rapidly cooled down to obtain a billet.Type: GrantFiled: April 9, 2014Date of Patent: June 28, 2016Assignee: HONDA MOTOR CO., LTD.Inventors: Tokuji Okumura, Taisei Wakisaka, Masahito Mutou, Taiji Mizuta, Yasunari Mizuta, Shinji Saeki, Hiroyasu Taniguchi, Yoshiaki Ito
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Publication number: 20160167176Abstract: In joining an Fe-based metallic member comprising an Fe-based material and an Al-based metallic member comprising an Al-based material by a Zn-based brazing filler metal, a joined part of the Fe-based metallic member is heated at a temperature higher than a melting point of the Fe-based material.Type: ApplicationFiled: February 1, 2016Publication date: June 16, 2016Inventors: Taisei Wakisaka, Tokuji Okumura, Takanori Suzuki
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Patent number: 9283634Abstract: Provided is an arc welding method and arc welding apparatus for arc welding by a brazing filler metal two base materials subjected to a plating process. An arc welding method for arc welding two base materials, at least one of which has a plating layer thereon, by a brazing filler material, performs alternately a plating layer removal process of removing a plating layer by performing arc discharge at a first current value while moving a welding torch along a welding line in a state of stopping feed of the brazing filler metal, and a brazing filler metal welding process of welding the brazing filler metal to a position where the plating layer is removed, by performing arc discharge at a second current value smaller than the first current value while feeding the brazing filler metal in a state of stopping a movement of the welding torch.Type: GrantFiled: April 8, 2014Date of Patent: March 15, 2016Assignee: HONDA MOTOR CO., LTD.Inventors: Taisei Wakisaka, Masahito Mutou, Tokuji Okumura, Takanori Suzuki, Shinya Oyama
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Publication number: 20160053347Abstract: Provided is a method for producing a zinc alloy capable of obtaining a Zn—Si alloy having a uniform composition. Metal Zn is melted in a crucible (2) provided in a heating furnace (1) to obtain a Zn molten metal (4). Floating of a metal Si powder (6) added to the Zn molten metal (4) is suppressed by a floating suppressing member (5). Heating is performed while a liquid surface of the Zn molten metal (4) is coated with a carbonaceous material (9), thereby melting the metal Si powder (6). The suppression of the floating of the metal Si powder (6) is released to allow the melted Si to be dispersed in the Zn molten metal (4), thereby obtaining a Zn—Si alloy molten metal (11). A copper casting mold (12) is filled with the Zn—Si alloy molten metal (11), and is rapidly cooled down to obtain a billet.Type: ApplicationFiled: April 9, 2014Publication date: February 25, 2016Applicant: HOMDA MOTOR CO., LTD.Inventors: Tokuji Okumura, Taisei Wakisaka, Masahito Mutou, Taiji Mizuta, Yasunari Mizuta, Shinji Saeki, Hiroyasu Taniguchi, Yoshiaki Ito
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Publication number: 20140305920Abstract: Provided is an arc welding method and arc welding apparatus for arc welding by a brazing filler metal two base materials subjected to a plating process. An arc welding method for arc welding two base materials, at least one of which has a plating layer thereon, by a brazing filler material, performs alternately a plating layer removal process of removing a plating layer by performing arc discharge at a first current value while moving a welding torch along a welding line in a state of stopping feed of the brazing filler metal, and a brazing filler metal welding process of welding the brazing filler metal to a position where the plating layer is removed, by performing arc discharge at a second current value smaller than the first current value while feeding the brazing filler metal in a state of stopping a movement of the welding torch.Type: ApplicationFiled: April 8, 2014Publication date: October 16, 2014Applicant: HONDA MOTOR CO., LTD.Inventors: Taisei Wakisaka, Masahito Mutou, Tokuji Okumura, Takanori Suzuki, Shinya Oyama
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Publication number: 20130270235Abstract: In joining an Fe-based metallic member comprising an Fe-based material and an Al-based metallic member comprising an Al-based material by a Zn-based brazing filler metal, a joined part of the Fe-based metallic member is heated at a temperature higher than a melting point of the Fe-based material.Type: ApplicationFiled: June 12, 2013Publication date: October 17, 2013Inventors: Taisei Wakisaka, Tokuji Okumura, Takanori Suzuki
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Publication number: 20130273390Abstract: In joining an Fe-based metallic member comprising an Fe-based material and an Al-based metallic member comprising an Al-based material by a Zn-based brazing filler metal, a joined part of the Fe-based metallic member is heated at a temperature higher than a melting point of the Fe-based material.Type: ApplicationFiled: June 12, 2013Publication date: October 17, 2013Inventors: Taisei Wakisaka, Tokuji Okumura, Takanori Suzuki
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Publication number: 20130272915Abstract: In joining an Fe-based metallic member comprising an Fe-based material and an Al-based metallic member comprising an Al-based material by a Zn-based brazing filler metal, a joined part of the Fe-based metallic member is heated at a temperature higher than a melting point of the Fe-based material.Type: ApplicationFiled: June 12, 2013Publication date: October 17, 2013Inventors: Taisei Wakisaka, Tokuji Okumura, Takanori Suzuki
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Patent number: 8492675Abstract: In joining an Fe-based metallic member comprising an Fe-based material and an Al-based metallic member comprising an Al-based material by a Zn-based filler metal, a joined part of the Fe-based metallic member is heated at a temperature higher than a melting point of the Fe-based material.Type: GrantFiled: April 21, 2009Date of Patent: July 23, 2013Assignee: Honda Motor Co., Ltd.Inventors: Taisei Wakisaka, Tokuji Okumura, Takanori Suzuki
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Publication number: 20110020666Abstract: In joining an Fe-based metallic member comprising an Fe-based material and an Al-based metallic member comprising an Al-based material by a Zn-based brazing filler metal, a joined part of the Fe-based metallic member is heated at a temperature higher than a melting point of the Fe-based material.Type: ApplicationFiled: April 21, 2009Publication date: January 27, 2011Applicant: HONDA MOTOR CO., LTD.Inventors: Taisei Wakisaka, Tokuji Okumura, Takanori Suzuki
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Publication number: 20100264199Abstract: The present invention provides a joining method for metal members, including: preparing an Fe-based metal member of Fe-based material, and an Al-based metal member of Al-based material; providing a Zn-based brazing filler metal between the Fe-based metal member and the Al-based metal member; and joining the Fe-based metal member and the Al-based metal member, wherein the Zn-based brazing filler metal includes: 2.0 mass % or less of Al; and the balance of Zn and inevitable impurities, and in the joining, the Zn-based brazing filler metal is heated such that a liquid phase of the Zn-based brazing filler metal is generated, and in solidification of the Zn-based brazing filler metal in a condition of the liquid phase, Zn primary crystal or eutectic of Zn and Al is crystallized.Type: ApplicationFiled: April 16, 2010Publication date: October 21, 2010Applicant: HONDA MOTOR CO., LTD.Inventors: Taisei Wakisaka, Takanori Suzuki, Tokuji Okumura
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Patent number: 7770916Abstract: A front face distance is obtained by measuring the position of a front face of an instrument panel held by an end effecter of a robot. An error on an optical axis, at the position of the front face is obtained based on the front face distance. Based on the error, the position of the instrument panel is adjusted so that a focal point of a laser meets the position at a predetermined depth defined with the front face as the standard. A back face of the instrument panel is irradiated with a laser to form a fine hole of a fragile section.Type: GrantFiled: March 6, 2006Date of Patent: August 10, 2010Assignee: Honda Motor Co., Ltd.Inventors: Tokuji Okumura, Kazushiro Wakabayashi, Mitsutaka Igaue, Hisashi Masuda, Yutaka Ebato, Masahiko Nakayama
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Publication number: 20080203708Abstract: A front face distance is obtained by measuring the position of a front face of an instrument panel held by an end effecter of a robot. An error on an optical axis, at the position of the front face is obtained based on the front face distance. Based on the error, the position of the instrument panel is adjusted so that a focal point of a laser meets the position at a predetermined depth defined with the front face as the standard. A back face of the instrument panel is irradiated with a laser to form a fine hole of a fragile section.Type: ApplicationFiled: March 6, 2006Publication date: August 28, 2008Inventors: Tokuji Okumura, Kazushiro Wakabayashi, Mitsutaka Igaue, Hisashi Masuda, Yutaka Ebato, Masahiko Nakayama
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Patent number: 6433304Abstract: Assuming that t1 represents a period of time until a detection signal is outputted after a sensor senses a laser beam passed through a through-hole of a workpiece, t2 represents a period of time until the detection signal derived from the sensor exceeds a preset threshold value, and t3 represents a period of time until radiation of the laser beam is actually stopped after the threshold value is exceeded, a total period of time (t1+t2+t3) of the periods of time t1 to t3 is set to be shorter than a time difference (T2−T3) between a pulse width (T3) and one cycle (T2) of a pulse signal for constructing a laser output command signal.Type: GrantFiled: December 22, 2000Date of Patent: August 13, 2002Assignee: Honda Giken Kogyo Kabushiki KaishaInventors: Tokuji Okumura, Kazushiro Wakabayashi, Kazuo Isogai, Hideshi Takekuma, Tsuneo Otake
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Publication number: 20010006168Abstract: Assuming that t1 represents a period of time until a detection signal is outputted after a sensor senses a laser beam passed through a through-hole of a workpiece, t2 represents a period of time until the detection signal derived from the sensor exceeds a preset threshold value, and t3 represents a period of time until radiation of the laser beam is actually stopped after the threshold value is exceeded, a total period of time (t1+t2+t3) of the periods of time t1 to t3 is set to be shorter than a time difference (T2−T3) between a pulse width (T3) and one cycle (T2) of a pulse signal for constructing a laser output command signal.Type: ApplicationFiled: December 22, 2000Publication date: July 5, 2001Inventors: Tokuji Okumura, Kazushiro Wakabayashi, Kazuo Isogai, Hideshi Takekuma, Tsuneo Otake