Patents by Inventor Hidehiko Tsukamoto
Hidehiko Tsukamoto 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: 5060497Abstract: A pair of dies are provided of which die faces are formed with depressions sequentially brought into engagement with a particular portion of a workpiece as the workpiece rolls between the die faces. By compressing the workpiece while driving the same to roll between the die faces, an excess metal of the workpiece is caused to flow into the depressions sequentially for thereby forming an asymmetrical part of the article.Type: GrantFiled: April 24, 1990Date of Patent: October 29, 1991Assignees: Nissan Motor Co., Ltd., Mitsubishi Jukogyo KabushikiInventors: Ryoichi Takahashi, Tomoyoshi Sato, Hidehiko Tsukamoto, Kazuo Morimoto, Nobutaka Maeda
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Patent number: 4811585Abstract: A pair of dies are provided of which die faces are formed with depressions sequentially brought into engagement with a particular portion of a workpiece as the workpiece rolls between the die faces. By compressing the workpiece while driving the same to roll between the die faces, an excess metal of the workpiece is caused to flow into the depressions sequentially for thereby forming an asymmetrical part of the article.Type: GrantFiled: March 30, 1987Date of Patent: March 14, 1989Assignees: Nissan Motor Co., Ltd., Mitsubishi Jukogyo Kabushiki KaishaInventors: Ryoichi Takahashi, Tomoyoshi Sato, Hidehiko Tsukamoto, Kazuo Morimoto, Nobutaka Maeda
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Patent number: 4722211Abstract: A method of roll forming hollow parts comprises introducing a workpiece into the space between a plurality of rolls rotatably arranged in spaced and parallel relationship, in parallel with the axes of the rolls, imparting rotation to the workpiece from drives through either the rolls or flanges disposed at both ends of the workpiece, at the same time forcing mandrels, slidably fitted at ends in the central openings of the flanges, through the openings into the workpiece, longitudinally from the both ends thereof, toward each other, and removing the excess metal left in the midportion of the workpiece between the mandrels by slightly moving the rolls toward each other for added compression, thereby producing spaces between the mandrels and the workpiece, and by moving the mandrels axially together with the excess metal to separate the latter from the rest of the workpiece.Type: GrantFiled: November 9, 1981Date of Patent: February 2, 1988Assignee: Mitsubishi Jukogyo Kabushiki KaishaInventors: Hidehiko Tsukamoto, Yoshiharu Taura, Hiroshi Shiota, Masanori Masumoto, Kotaro Yagishita
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Patent number: 4716687Abstract: An improved method and apparatus for grinding a rotary body, in which a rotatably supported grindstone is positioned in such manner that an extension of a rotary axis of the grindstone does not intersect a rotary axis of the rotary body and the rotary axis of the grindstone is inclined with respect to a plane perpendicular to the rotary axis of the rotary body to be ground. The rotary body to be ground is rotatably driven, and the grindstone is pressed against the outer circumferential surface of the rotary body to be ground in order that the outer circumferential surface of the rotary body to be ground can be ground by a relative slip produced at a contact point between the outer circumferential surface of the rotary body to be ground and the grindstone.Type: GrantFiled: February 3, 1986Date of Patent: January 5, 1988Assignee: Mitsubishi Jukogyo Kabushiki KaishaInventors: Hidehiko Tsukamoto, Kanji Hayashi, Tsunetaka Sumomogi, Masashi Oya, Junichi Ibushi, Katsuaki Takasaki, Masao Arikawa, Tateo Tanimoto, Kunio Yamamoto, Kanehisa Miyaguchi, Yoshiki Mito, Tamenari Doho
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Patent number: 4672830Abstract: A method of controlling an edging opening in a rolling mill, comprising measuring a width distribution of a plate to be rolled at an inlet of an edging roll in the rolling mill, calculating beforehand a width deviation distribution and a length in the moving direction of the plate at an irregular deformation portion caused in a rolling process in accordance with a predetermined pass schedule and a target width deviation distribution of the rolled plate required at an outlet of the rolling mill, calculating an optimum edging opening variation distribution using a plate width adjustment efficiency calculated on the basis of the beforehand calculated value and supplying the optimum edging opening variation distribution to an edging opening setting unit for the feedforward control.Type: GrantFiled: May 30, 1985Date of Patent: June 16, 1987Assignees: Mitsubishi Jukogyo Kabushiki Kaisha, Mitsubishi Denki Kabushiki KaishaInventors: Hidehiko Tsukamoto, Eiji Kohmoto, Koichi Asada, deceased, Masakuni Yamasaki, Kenichi Matsumoto, Euji Nakazono, Yoshinori Wakamiya, Satoru Kuramoto
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Patent number: 4170889Abstract: Upon roll-forming an end plate of hemispherical and other cup-like or dish-like configurations, a raw material disc is placed between outer die means consisting of a top outer forming die that can be vertically moved by a drive source and can be freely rotated and at least a pair of left and right outer forming rolls adapted to move along predetermined moving paths and inner die means consisting of a top inner forming die held at a predetermined position that can be driven in rotation by a drive source, and a middle inner forming roll a bottom inner roll both of which are freely rotatable, the outer die means is depressed against the inner die means, and said pair of outer forming rolls are moved along said moving paths so as to press said raw material disc against the middle inner forming roll and the bottom inner forming roll, respectively, one of said outer forming rolls being moved within an effective forming range of the middle inner forming roll, while the other being moved within an effective forming rType: GrantFiled: June 8, 1978Date of Patent: October 16, 1979Assignee: Mitsubishi Jukogyo Kabushiki KaishaInventors: Tateo Tanimoto, Yukio Hiasa, Hidehiko Tsukamoto, Tetsuo Ichikizaki, Akihiro Shindo, Akira Wakayama
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Patent number: 4065948Abstract: Improved roll-forming dies in a cross-rolling machine are described herein, which enable a shaped surface having any arbitrary inclination angle to be self-generated when a shaft portion of a stepped cylindrical article having a large diameter-reduction factor is formed by rolling. The improved dies are distinguished from the conventional ones in that a height of a die top portion contacting with a raw material rod with respect to a reference surface of said die is successively and continuously increased in the direction of advance of the die from a start point of a depression spreading portion of the die or its proximity up to a start point of a finishing portion or its proximity, and also in that a width of a shaping inclined surface of the roll-forming die is gradually reduced in the direction of the advance of said die from the start point of the depression spreading portion of said die or its proximity up to the start point of the finishing portion or its proximity.Type: GrantFiled: November 3, 1975Date of Patent: January 3, 1978Assignee: Mitsubishi Jukogyo Kabushiki KaishaInventors: Hidehiko Tsukamoto, Nobutaka Maeda
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Patent number: 3954001Abstract: Dies for cross rolling machines for manufacturing a graduated shaft from a round bar, characterized therein that levels of dies in contact with a rolled material is formed increasingly higher from a developing point of shaping for the dies in the forward direction of said dies to a finishing point of shaping for the dies so as to elongate a minimum diameter portion or a portion of axis having large surface reduction by top portions of the dies during advance in the rolling operation of the dies.Type: GrantFiled: October 2, 1974Date of Patent: May 4, 1976Assignee: Mitsubishi Jukogyo Kabushiki KaishaInventors: Hidehiko Tsukamoto, Nobutaka Maeda
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Patent number: 3942348Abstract: Cutter dies for cross rolling machines, each of which dies consisting of a shaping surface and a finishing surface, the width of the shaping surface being increasingly smaller and its height larger towards the end portions of the shaping surface, characterized in that the width of the shaping surface is further increased in the end portions of the cutter dies from a preferred position in an angle substantially less than 15.degree. from the end portions of the cutter dies.Type: GrantFiled: October 15, 1974Date of Patent: March 9, 1976Assignee: Mitsubishi Jukogyo Kabushiki KaishaInventors: Nobutaka Maeda, Hidehiko Tsukamoto
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Patent number: 3938375Abstract: A process and apparatus for rollingly forming a cylindrical member having a reduced diameter portion at its intermediate portion by using a cross-rolling forming apparatus. The width in cross-section each of the dies in the rolls of the apparatus is gradually varied or decreased as the working of the member advances by providing clearance surfaces in the beveled side surfaces of the dies at an appropriate escape angle so that the surfaces in the member which have been worked by the dies are held clear of the side surfaces of the dies.Type: GrantFiled: January 15, 1974Date of Patent: February 17, 1976Assignee: Mitsubishi Jukogyo Kabushiki KaishaInventors: Mokuji Koizumi, Yukitsugu Kobayashi, Hidehiko Tsukamoto, Nobutaka Maeda