Patents by Inventor Hisanori Okamura
Hisanori Okamura 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: 20030005852Abstract: In a railway car, extruded frame members of an aluminum base alloy containing Si of 0.4-0.9 wt % and Mg of 0.4-1.2 wt % are welded according to a friction stir welding method. In a structure, an aluminum base alloy plate containing Si of 0.4-0.9 wt % and Mg of 0.4-1.2 wt % is prepared, to one face of the aluminum base alloy plate a rib is formed, and the aluminum base alloy plate is an extruded frame member. Accordingly, a railway car having a low welding distortion and a structure having a low welding distortion can be obtained.Type: ApplicationFiled: July 5, 2002Publication date: January 9, 2003Inventors: Hisanori Okamura, Isao Funyuu, Akihiro Satou, Kinya Aota, Masakuni Ezumi, Yasuo Ishimaru
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Publication number: 20020162876Abstract: Disclosed is a friction stir welding technique which avoids occurrence of a dent, in adjoining region, extending to a level beneath the joined surfaces, structural body formed. At end portions of the frame members to be joined, at the joining region, thickened parts which project toward the rotary body joining tool are provided. The rotary body joining tool has a small-diameter tip portion and a larger diameter portion. The rotary body joining tool is inserted in the thickened parts. In a state where the rotary body joining tool has been inserted small-diameter tip end first, to a level where the larger diameter portion of the rotary body joining tool overlaps the thickened part but does not extend below the upper surface of the non-thickened surfaces of the members joined, the rotary body is rotated and moved along the joining region.Type: ApplicationFiled: July 3, 2002Publication date: November 7, 2002Inventors: Kinya Aota, Masakuni Ezumi, Yasuo Ishimaru, Hisanori Okamura, Isao Funyuu, Akihiro Satou
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Publication number: 20020153130Abstract: The present invention is a cooling plate including a groove, which becomes a passage of a coolant, inside a body, wherein one or more fins are provided inside the groove, wherein the groove is covered with a lid having width larger than the groove, wherein the lid is joined to the body by friction stir welding, and wherein a weld bead formed by the joining is outside the passage, and the weld bead formed by the joining is formed within the body and further, is characterized by a manufacturing method of a cooling plate that has a first groove, which becomes a passage of a coolant, and a second groove, which has width larger than the first groove and receives a lid on the first groove, inside a body, receives the lid on the second groove, and is joined to the body, the manufacturing method of a cooling plate wherein, while the lid and the body are joined together by the friction stir welding owing to insertion of a rotation tool having a shoulder and a pin, the joining is performed so that a weld bead formed byType: ApplicationFiled: December 21, 2001Publication date: October 24, 2002Inventors: Kazutaka Okamoto, Masayuki Doi, Hisanori Okamura, Yasuhisa Aono, Manabu Kagawa, Satoshi Hirano, Kinya Aota
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Publication number: 20020145031Abstract: It is an object of the present invention to provide a friction stir welding method and apparatus capable of maintaining a rotating tool and workpieces at a substantially constant geometrical relation for arbitrary curved surfaces having a three-dimensional shape, as well as a welded structure obtained thereby.Type: ApplicationFiled: August 28, 2001Publication date: October 10, 2002Inventors: Satoshi Hirano, Hisanori Okamura, Yasuhisa Aono, Kazutaka Okamoto, Kinya Aota, Tomio Odakura, Shinichi Hasshuu
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Publication number: 20020139831Abstract: Disclosed is a friction stir welding technique which avoids occurrence of a dent, in adjoining region, extending to a level beneath the joined surfaces, structural body formed. At end portions of the frame members to be joined, at the joining region, thickened parts which project toward the rotary body joining tool are provided. The rotary body joining tool has a small-diameter tip portion and a larger diameter portion. The rotary body joining tool is inserted in the thickened parts. In a state where the rotary body joining tool has been inserted small-diameter tip end first, to a level where the larger diameter portion of the rotary body joining tool overlaps the thickened part but does not extend below the upper surface of the non-thickened surfaces of the members joined, the rotary body is rotated and moved along the joining region.Type: ApplicationFiled: May 28, 2002Publication date: October 3, 2002Inventors: Kinya Aota, Masakuni Ezumi, Yasuo Ishimaru, Hisanori Okamura, Isao Funyuu, Akihiro Satou
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Publication number: 20020094446Abstract: Disclosed is a friction stir welding technique which avoids occurrence of a dent, in adjoining region, extending to a level beneath the joined surfaces. At end portions of the frame members to be joined, at the joining region, thickened parts which project toward the rotary body joining tool are provided. Two adjoining thickened parts, of adjacent members to be joined, can form a trapezoid shape. The rotary body joining tool has a small-diameter tip portion and a larger diameter portion. The rotary body joining tool is inserted in the thickened parts. In a state where the rotary body joining tool has been inserted small-diameter tip and first, to a level where the larger diameter portion of the rotary body joining tool overlaps the thickened part but does not extend below the upper surface of the non-thickened surfaces of the members joined, the rotary body is rotated and moved along the joining region. Even when a gap exists between two thickened parts, a desirable joining can be carried out.Type: ApplicationFiled: March 13, 2002Publication date: July 18, 2002Inventors: Kinya Aota, Masakuni Ezumi, Yasuo Ishimaru, Hisanori Okamura, Isao Funyuu, Akihiro Satou
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Patent number: 6419144Abstract: Disclosed is a friction stir welding technique which avoids occurrence of a dent, in adjoining region, extending to a level beneath the joined surfaces. At end portions of the frame members to be joined, at the joining region, thickened parts which project toward the rotary body joining tool are provided. Two adjoining thickened parts, of adjacent members to be joined, can form a trapezoid shape. The rotary body joining tool has a small-diameter tip portion and a larger diameter portion. The rotary body joining tool is inserted in the thickened parts. In a state where the rotary body joining tool has been inserted small-diameter tip and first, to a level where the larger diameter portion of the rotary body joining tool overlaps the thickened part but does not extend below the upper surface of the non-thickened surfaces of the members joined, the rotary body is rotated and moved along the joining region. Even when a gap exists between two thickened parts, a desirable joining can be carried out.Type: GrantFiled: April 10, 2001Date of Patent: July 16, 2002Assignee: Hitachi, Ltd.Inventors: Kinya Aota, Masakuni Ezumi, Yasuo Ishimaru, Hisanori Okamura, Isao Funyuu, Akihiro Satou
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Publication number: 20020090526Abstract: Disclosed is a friction stir welding technique which avoids occurrence of a dent, in adjoining region, extending to a level beneath the joined surfaces. At end portions of the frame members to be joined, at the joining region, thickened parts which project toward the rotary body joining tool are provided. Two adjoining thickened parts, of adjacent members to be joined, can form a trapezoid shape. The rotary body joining tool has a small-diameter tip portion and a larger diameter portion. The rotary body joining tool is inserted in the thickened parts. In a state where the rotary body joining tool has been inserted small-diameter tip and first, to a level where the larger diameter portion of the rotary body joining tool overlaps the thickened part but does not extend below the upper surface of the non-thickened surfaces of the members joined, the rotary body is rotated and moved along the joining region. Even when a gap exists between two thickened parts, a desirable joining can be carried out.Type: ApplicationFiled: March 13, 2002Publication date: July 11, 2002Inventors: Kinya Aota, Masakumi Ezumi, Yasuo Ishimaru, Hisanori Okamura, Isao Funyuu, Akihiro Satou
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Patent number: 6382498Abstract: Disclosed is a friction stir welding technique which avoids occurrence of a dent, in adjoining region, extending to a level beneath the joined surfaces. At end portions of the frame members to be joined, at the joining region, thickened parts which project toward the rotary body joining tool are provided. Two adjoining thickened parts, of adjacent members to be joined, can form a trapezoid shape. The rotary body joining tool has a small-diameter tip portion and a larger diameter portion. The rotary body joining tool is inserted in the thickened parts. In a state where the rotary body joining tool has been inserted small-diameter tip and first, to a level where the larger diameter portion of the rotary body joining tool overlaps the thickened part but does not extend below the upper surface of the non-thickened surfaces of the members joined, the rotary body is rotated and moved along the joining region. Even when a gap exists between two thickened parts, a desirable joining can be carried out.Type: GrantFiled: April 10, 2001Date of Patent: May 7, 2002Assignee: Hitachi, Ltd.Inventors: Kinya Aota, Masakuni Ezumi, Yasuo Ishimaru, Hisanori Okamura, Isao Funyuu, Akihiro Satou
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Patent number: 6378754Abstract: Disclosed is a friction stir welding technique which avoids occurrence of a dent, in adjoining region, extending to a level beneath the joined surfaces. At end portions of the frame members to be joined, at the joining region, thickened parts which project toward the rotary body joining tool are provided. Two adjoining thickened parts, of adjacent members to be joined, can form a trapezoid shape. The rotary body joining tool has a small-diameter tip portion and a larger diameter portion. The rotary body joining tool is inserted in the thickened parts. In a state where the rotary body joining tool has been inserted small-diameter tip and first, to a level where the larger diameter portion of the rotary body joining tool overlaps the thickened part but does not extend below the upper surface of the non-thickened surfaces of the members joined, the rotary body is rotated and moved along the joining region. Even when a gap exists between two thickened parts, a desirable joining can be carried out.Type: GrantFiled: April 10, 2001Date of Patent: April 30, 2002Assignee: Hitachi, Ltd.Inventors: Kinya Aota, Masakuni Ezumi, Yasuo Ishimaru, Hisanori Okamura, Isao Funyuu, Akihiro Satou
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Publication number: 20020027155Abstract: The invention intends to reduce a frequency at which defects occur in a welding region during friction stir welding, and to improve the reliability of the welding region. The invention resides in a friction stir welding apparatus wherein a distance to the surfaces of the workpieces is detected by a detector, a change of the detected distance is found by a signal processing device, and a tool is rotated by a rotation driving device in a state where a vertical driving device is controlled by a control device so as to suppress the found change, whereby a plastic fluidity of the workpieces is caused to accomplish joining of the workpieces.Type: ApplicationFiled: August 29, 2001Publication date: March 7, 2002Inventors: Hisanori Okamura, Masahiko Sakamoto, Kinya Aota, Isao Funyu, Kouichi Watanabe, Akihiro Sato, Masakuni Ezumi, Yasuo Ishimaru
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Publication number: 20020023941Abstract: The object of the present invention is to provide a friction stir bonding method of a tubular portion such as a hollow-shaped material and the like which does not deform the same during friction stir bonding.Type: ApplicationFiled: February 26, 2001Publication date: February 28, 2002Inventors: Masakuni Ezumi, Kazushige Fukuyori, Hisanori Okamura
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Patent number: 6305866Abstract: A friction stir welding technique which avoids occurrence of a dent, in a joining region, extending to a level beneath the joined surfaces. At end portions of the frame members to be joined, at the joining region, thickened parts which project toward the rotary body joining tool are provided. Two adjoining thickened parts, of adjacent members to be joined, can form a trapezoid shape. The rotary body joining tool has a small-diameter tip portion and a larger diameter portion. The rotary body joining tool is inserted in the thickened parts. In a state where the rotary body joining tool has been inserted small-diameter tip end first, to a level where the larger diameter portion of the rotary body joining tool overlaps the thickened part but does not extend below the upper surface of the non-thickened surfaces of the members joined, the rotary body is rotated and moved along the joining region. Even when a gap exists between two thickened parts, a desirable joining can be carried out.Type: GrantFiled: April 11, 2000Date of Patent: October 23, 2001Assignee: Hitachi, Ltd.Inventors: Kinya Aota, Masakuni Ezumi, Yasuo Ishimaru, Hisanori Okamura, Isao Funyuu, Akihiro Satou
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Patent number: 6299050Abstract: The invention intends to reduce a frequency at which defects occur in a welding region during friction stir welding, and to improve the reliability of the welding region. The invention resides in a friction stir welding apparatus wherein a distance to the surfaces of the workpieces is detected by a detector, a change of the detected distance is found by a signal processing device, and a tool is rotated by a rotation driving device in a state where a vertical driving device is controlled by a control device so as to suppress the found change, whereby a plastic fluidity of the workpieces is caused to accomplish joining of the workpieces.Type: GrantFiled: February 24, 2000Date of Patent: October 9, 2001Assignee: Hitachi, Ltd.Inventors: Hisanori Okamura, Masahiko Sakamoto, Kinya Aota, Isao Funyu, Kouichi Watanabe, Akihiro Sato, Masakuni Ezumi, Yasuo Ishimaru
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Publication number: 20010011671Abstract: Disclosed is a friction stir welding technique which avoids occurrence of a dent, in adjoining region, extending to a level beneath the joined surfaces. At end portions of the frame members to be joined, at the joining region, thickened parts which project toward the rotary body joining tool are provided. Two adjoining thickened parts, of adjacent members to be joined, can form a trapezoid shape. The rotary body joining tool has a small-diameter tip portion and a larger diameter portion. The rotary body joining tool is inserted in the thickened parts. In a state where the rotary body joining tool has been inserted small-diameter tip and first, to a level where the larger diameter portion of the rotary body joining tool overlaps the thickened part but does not extend below the upper surface of the non-thickened surfaces of the members joined, the rotary body is rotated and moved along the joining region. Even when a gap exists between two thickened parts, a desirable joining can be carried out.Type: ApplicationFiled: April 10, 2001Publication date: August 9, 2001Inventors: Kinya Aota, Masakuni Ezumi, Yasuo Ishimaru, Hisanori Okamura, Isao Funyuu, Akihiro Satou
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Publication number: 20010011670Abstract: Disclosed is a friction stir welding technique which avoids occurrence of a dent, in adjoining region, extending to a level beneath the joined surfaces. At end portions of the frame members to be joined, at the joining region, thickened parts which project toward the rotary body joining tool are provided. Two adjoining thickened parts, of adjacent members to be joined, can form a trapezoid shape. The rotary body joining tool has a small-diameter tip portion and a larger diameter portion. The rotary body joining tool is inserted in the thickened parts. In a state where the rotary body joining tool has been inserted small-diameter tip and first, to a level where the larger diameter portion of the rotary body joining tool overlaps the thickened part but does not extend below the upper surface of the non-thickened surfaces of the members joined, the rotary body is rotated and moved along the joining region. Even when a gap exists between two thickened parts, a desirable joining can be carried out.Type: ApplicationFiled: April 10, 2001Publication date: August 9, 2001Inventors: Kinya Aota, Masakuni Ezumi, Yasuo Ishimaru, Hisanori Okamura, Isao Funyuu, Akihiro Satou
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Publication number: 20010011673Abstract: Disclosed is a friction stir welding technique which avoids occurrence of a dent, in adjoining region, extending to a level beneath the joined surfaces. At end portions of the frame members to be joined, at the joining region, thickened parts which project toward the rotary body joining tool are provided. Two adjoining thickened parts, of adjacent members to be joined, can form a trapezoid shape. The rotary body joining tool has a small-diameter tip portion and a larger diameter portion. The rotary body joining tool is inserted in the thickened parts. In a state where the rotary body joining tool has been inserted small-diameter tip and first, to a level where the larger diameter portion of the rotary body joining tool overlaps the thickened part but does not extend below the upper surface of the non-thickened surfaces of the members joined, the rotary body is rotated and moved along the joining region. Even when a gap exists between two thickened parts, a desirable joining can be carried out.Type: ApplicationFiled: April 10, 2001Publication date: August 9, 2001Inventors: Kinya Aota, Masakuni Ezumi, Yasuo Ishimaru, Hisanori Okamura, Isao Funyuu, Akihiro Satou
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Publication number: 20010011672Abstract: Disclosed is a friction stir welding technique which avoids occurrence of a dent, in adjoining region, extending to a level beneath the joined surfaces. At end portions of the frame members to be joined, at the joining region, thickened parts which project toward the rotary body joining tool are provided. Two adjoining thickened parts, of adjacent members to be joined, can form a trapezoid shape. The rotary body joining tool has a small-diameter tip portion and a larger diameter portion. The rotary body joining tool is inserted in the thickened parts. In a state where the rotary body joining tool has been inserted small-diameter tip and first, to a level where the larger diameter portion of the rotary body joining tool overlaps the thickened part but does not extend below the upper surface of the non-thickened surfaces of the members joined, the rotary body is rotated and moved along the joining region. Even when a gap exists between two thickened parts, a desirable joining can be carried out.Type: ApplicationFiled: April 10, 2001Publication date: August 9, 2001Inventors: Kinya Aota, Masakuni Ezumi, Yasuo Ishimaru, Hisanori Okamura, Isao Funyuu, Akihiro Satou
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Publication number: 20010010855Abstract: Disclosed is a friction stir welding technique which avoids occurrence of a dent, in adjoining region, extending to a level beneath the joined surfaces. At end portions of the frame members to be joined, at the joining region, thickened parts which project toward the rotary body joining tool are provided. Two adjoining thickened parts, of adjacent members to be joined, can form a trapezoid shape. The rotary body joining tool has a small-diameter tip portion and a larger diameter portion. The rotary body joining tool is inserted in the thickened parts. In a state where the rotary body joining tool has been inserted small-diameter tip and first, to a level where the larger diameter portion of the rotary body joining tool overlaps the thickened part but does not extend below the upper surface of the non-thickened surfaces of the members joined, the rotary body is rotated and moved along the joining region. Even when a gap exists between two thickened parts, a desirable joining can be carried out.Type: ApplicationFiled: April 10, 2001Publication date: August 2, 2001Inventors: Kinya Aota, Masakuni Ezumi, Yasuo Ishimaru, Hisanori Okamura, Isao Funyuu, Akihiro Satou
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Patent number: 6237829Abstract: Disclosed is a friction stir welding technique which avoids occurrence of a dent, in a joining region, extending to a level beneath the joined surfaces. At end portions of the frame members to be joined, at the joining region, thickened parts which project toward the rotary body joining tool are provided. Two adjoining thickened parts, of adjacent members to be joined, can form a trapezoid shape. The rotary body joining tool has a small-diameter tip portion and a larger diameter portion. The rotary body joining tool is inserted in the thickened parts. In a state where the rotary body joining tool has been inserted small-diameter tip end first, to a level where the larger diameter portion of the rotary body joining tool overlaps the thickened part but does not extend below the upper surface of the non-thickened surfaces of the members joined, the rotary body is rotated and moved along the joining region. Even when a gap exists between two thickened parts, a desirable joining can be carried out.Type: GrantFiled: April 11, 2000Date of Patent: May 29, 2001Assignee: Hitachi, Ltd.Inventors: Kinya Aota, Masakuni Ezumi, Yasuo Ishimaru, Hisanori Okamura, Isao Funyuu, Akihiro Satou