Patents by Inventor Hidemitsu Takaoka
Hidemitsu Takaoka 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: 10086438Abstract: A cutting tool made of diamond-coated cemented carbide includes: a tool body made of tungsten carbide-based cemented carbide including: 3 to 15 mass % of Co; at least one of TaC and NbC of which a total amount is 0.1 to 3.0 mass %; and a balance including WC; and a diamond film coating the tool body, the tool body has a plurality of protrusions on a surface of the tool body, an upper portion of each of the protrusions is made of the at least one of TaC and NbC, and a lower portion of each of the protrusions is made of WC and Co, the lower portion being under the upper portion.Type: GrantFiled: November 28, 2014Date of Patent: October 2, 2018Assignee: MITSUBISHI MATERIALS CORPORATIONInventors: Hideaki Takashima, Hidemitsu Takaoka
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Publication number: 20160375497Abstract: A cutting tool made of diamond-coated cemented carbide includes: a tool body made of tungsten carbide-based cemented carbide including: 3 to 15 mass % of Co; at least one of TaC and NbC of which a total amount is 0.1 to 3.0 mass %; and a balance including WC; and a diamond film coating the tool body, the tool body has a plurality of protrusions on a surface of the tool body, an upper portion of each of the protrusions is made of the at least one of TaC and NbC, and a lower portion of each of the protrusions is made of WC and Co, the lower portion being under the upper portion.Type: ApplicationFiled: November 28, 2014Publication date: December 29, 2016Applicant: MITSUBISHI MATERIALS CORPORATIONInventors: Hideaki TAKASHIMA, Hidemitsu TAKAOKA
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Patent number: 8895110Abstract: A method of manufacturing a surface-coated cutting tool includes: forming an aluminum oxide layer having a layer thickness of 0.05 to 5 ?m and an ?-alumina structure with a corundum type crystal structure on a cutting tool body using a sol-gel method. The step of forming includes adding an alcohol to aluminum alkoxide; adding an acid; stirring the mixture at 10° C. or lower to form a sol; applying the sol on a surface of the cutting tool body or an outer-most surface of a hard-coating layer formed on the surface of the cutting tool body; performing a drying process at least once, the applied sol being dried at 100 to 400° C. in the drying process; and annealing the cutting tool body with a dried sol layer at 500 to 1000° C.Type: GrantFiled: February 22, 2012Date of Patent: November 25, 2014Assignees: Mitsubishi Materials Corporation, National University Corporaiton Shizuoka University, Tokyo Institute of TechnologyInventors: Hidemitsu Takaoka, Akira Osada, Naoki Wakiya, Hisao Suzuki, Kazuo Shinozaki
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Publication number: 20120219720Abstract: A method of manufacturing a surface-coated cutting tool includes: forming an aluminum oxide layer having a layer thickness of 0.05 to 5 ?m and an ?-alumina structure with a corundum type crystal structure on a cutting tool body using a sol-gel method. The step of forming includes adding an alcohol to aluminum alkoxide; adding an acid; stirring the mixture at 10° C. or lower to form a sol; applying the sol on a surface of the cutting tool body or an outer-most surface of a hard-coating layer formed on the surface of the cutting tool body; performing a drying process at least once, the applied sol being dried at 100 to 400° C. in the drying process; and annealing the cutting tool body with a dried sol layer at 500 to 1000° C.Type: ApplicationFiled: February 22, 2012Publication date: August 30, 2012Applicants: Mitsubishi Materials Corporation, Tokyo Institute of Technology, National University Corporation Shizuoka UniversityInventors: Hidemitsu TAKAOKA, Akira Osada, Naoki Wakiya, Hisao Suzuki, Kazuo Shinozaki
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Patent number: 8017225Abstract: A cutting tool made of surface-coated cubic boron nitride-based ultrahigh pressure sintered material, comprising a cutting insert main body formed by ultrahigh pressure sintering of compact composed of titanium nitride, aluminum and/or aluminum oxide, and boron nitride, and a hard coating layer vapor deposited on the main body. The main body has a texture containing cubic boron nitride, titanium nitride and reaction product. The hard coating layer has a lower layer of composite nitride having a composition of [Ti1-XAlX]N, where X is in a range from 0.40 to 0.60 in an atomic ratio, and the upper layer comprises a thin layer A having the composition of [Ti1-XAlX]N, where X is in a range from 0.40 to 0.60 in an atomic ratio, and a thin layer B consisting of a Ti nitride (TiN). The upper layer has a consisting of the thin layer A and a thin layer B layered alternately.Type: GrantFiled: December 20, 2006Date of Patent: September 13, 2011Assignee: Mitsubishi Materials CorporationInventors: Hidemitsu Takaoka, Itsuro Tajima
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Patent number: 7939186Abstract: A cutting tool made of a surface-coated cubic boron nitride-based ultra-high-pressure sintered material, comprising a cutting insert main body formed by ultra-high-pressure sintering of a compact composed of titanium nitride, aluminum and/or aluminum oxide, and boron nitride, and a hard coating layer vapor deposited on the main body. The main body has a texture containing cubic boron nitride, titanium nitride and reaction product. The hard coating layer has a lower layer of nitride having a composition of [Ti1 -X-YAlXSiY]N, where X is in a range from 0.40 to 0.60 and Y is in a range from 0.02 to 0.10 in an atomic ratio, and the upper layer comprises a thin layer A having the composition of [Ti1-X-YAlXSiY]N, where X is in a range from 0.40 to 0.60 in an atomic ratio and Y is in a range from 0.02 to 0.10, and a thin layer B consisting of a Ti nitride (TiN). The upper layer consists of the thin layer A and a thin layer B layered alternately.Type: GrantFiled: May 24, 2007Date of Patent: May 10, 2011Assignee: Mitsubishi Materials CorporationInventors: Hidemitsu Takaoka, Itsurou Tajima
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Publication number: 20070275268Abstract: A cutting tool made of a surface-coated cubic boron nitride-based ultra-high-pressure sintered material, comprising a cutting insert main body formed by ultra-high-pressure sintering of a compact composed of titanium nitride, aluminum and/or aluminum oxide, and boron nitride, and a hard coating layer vapor deposited on the main body. The main body has a texture containing cubic boron nitride, titanium nitride and reaction product. The hard coating layer has a lower layer of nitride having a composition of [Ti1-X-YAlXSiY]N, where X is in a range from 0.40 to 0.60 and Y is in a range from 0.02 to 0.10 in an atomic ratio, and the upper layer comprises a thin layer A having the composition of [Ti1-X-YAlXSiY]N, where X is in a range from 0.40 to 0.60 in an atomic ratio and Y is in a range from 0.02 to 0.10, and a thin layer B consisting of a Ti nitride (TiN). The upper layer consists of the thin layer A and a thin layer B layered alternately.Type: ApplicationFiled: May 24, 2007Publication date: November 29, 2007Applicants: Mitsubishi Materials Corporation, Mitsubishi Materials Kobe Tools CorporationInventors: Hidemitsu Takaoka, Itsurou Tajima
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Patent number: 7258933Abstract: A coated cutting tool member exhibiting not only a superior wear resistance during a high speed cutting operation in which a significant amount of heat is generated, but also exhibit a superior shipping resistance even when such a cutting operation is performed under severe conditions, such as with a large depth of cut or a large feed. In the coated cutting tool member, a hard coating layer of one of nitride compound and carbonitride compound containing Ti and Al is formed using a physical vapor deposition method at an average thickness of 1 to 10 ?m, and the hard coating layer includes Zr at an atomic ratio of 0.002 to 0.1, and at least one of Y and Ce at an atomic ratio of 0.0005 to 0.05 in a coexistence state.Type: GrantFiled: June 20, 2003Date of Patent: August 21, 2007Assignees: Mitsubishi Materials Corporation, Mitsubishi Materials Kobe Tools CorporationInventors: Hidemitsu Takaoka, Eiji Nakamura
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Publication number: 20070148496Abstract: A cutting tool made of surface-coated cubic boron nitride-based ultrahigh pressure sintered material, comprising a cutting insert main body formed by ultrahigh pressure sintering of compact composed of titanium nitride, aluminum and/or aluminum oxide, and boron nitride, and a hard coating layer vapor deposited on the main body. The main body has a texture containing cubic boron nitride, titanium nitride and reaction product. The hard coating layer has a lower layer of composite nitride having a composition of [Ti1?XAlX]N, where X is in a range from 0.40 to 0.60 in an atomic ratio, and the upper layer comprises a thin layer A having the composition of [Ti1?XAlX]N, where X is in a range from 0.40 to 0.60 in an atomic ratio, and a thin layer B consisting of a Ti nitride (TiN). The upper layer has a consisting of the thin layer A and a thin layer B layered alternately.Type: ApplicationFiled: December 20, 2006Publication date: June 28, 2007Applicants: Mitsubishi Materials Corporation, Mitsubishi Materials Kobe Tools CorporationInventors: Hidemitsu Takaoka, Itsuro Tajima
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Patent number: 7150925Abstract: The invention provides a coated cutting tool made of cemented carbide in which a hard coating layer has excellent wear resistance in high-speed cutting operation, wherein (a) a crystal orientation hysteresis layer which consists of a carbonitride compound layer and (b) a hard coating layer which consists of a layer of nitride compound and has a well defined crystal orientation and/or degree of crystallinity are formed on the surface of a cemented carbide substrate, preferably on the surface of a tungsten carbide based cemented carbide or titanium carbonitride based cermet by physical vapor deposition, wherein the crystal orientation hysteresis layer is deposited between the surface of a cemented carbide substrate and the hard coating layer. In one specific example, (a1) the carbonitride compound layer has an average thickness of 0.05 to 0.5 ?m and is preferably a Ti—Al carbonitride compound layer expressed by the composition formula as (Ti1?XAlX)(N1?YCY), wherein X ranges from 0.05 to 0.Type: GrantFiled: October 28, 2002Date of Patent: December 19, 2006Assignees: Mitsubishi Materials Kobe Tools Corporation, Mitsubishi Materials CorporationInventors: Kazunori Sato, Akihiro Kondo, Yusuke Tanaka, Yasuhiko Tashiro, Eiji Nakamura, Hidemitsu Takaoka
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Patent number: 7144639Abstract: A surface-coated cutting tool member exhibiting a superior tool life due to a hard coating layer thereof is provided. The surface-coated cutting tool member includes a tungsten carbide based cemented carbide substrate, a titanium carbonitride based cermet substrate, or a cubic boron nitride based sintered substrate; and a hard coating layer of a nitride compound containing titanium and yttrium, which is formed on a surface of the substrate using a physical vapor deposition method in an overall average thickness of 1 to 15 ?m.Type: GrantFiled: January 30, 2003Date of Patent: December 5, 2006Assignees: Mitsubishi Materials Corporation, Mitsubishi Materials Kobe Tools CorporationInventors: Eiji Nakamura, Hidemitsu Takaoka, Yasuhiko Tashiro
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Publication number: 20050227116Abstract: A coated cutting tool member exhibiting not only a superior wear resistance during a high speed cutting operation in which a significant amount of heat is generated, but also exhibit a superior shipping resistance even when such a cutting operation is performed under severe conditions, such as with a large depth of cut or a large feed. In the coated cutting tool member, a hard coating layer of one of nitride compound and carbonitride compound containing Ti and Al is formed using a physical vapor deposition method at an average thickness of 1 to 10 ?m, and the hard coating layer includes Zr at an atomic ratio of 0.002 to 0.1, and at least one of Y and Ce at an atomic ratio of 0.0005 to 0.05 in a coexistence state.Type: ApplicationFiled: June 20, 2003Publication date: October 13, 2005Inventors: Hidemitsu Takaoka, Eiji Nakamura
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Publication number: 20050089727Abstract: A surface-coated cutting tool member exhibiting a superior tool life due to a hard coating layer thereof is provided. The surface-coated cutting tool member includes a tungsten carbide based cemented carbide substrate, a titanium carbonitride based cermet substrate, or a cubic boron nitride based sintered substrate; and a hard coating layer of a nitride compound containing titanium and yttrium, which is formed on a surface of the substrate using a physical vapor deposition method in an overall average thickness of 1 to 15 ?m.Type: ApplicationFiled: January 30, 2003Publication date: April 28, 2005Applicants: Mitsubishi Materials Corporation, Mitsubishi Materials Kobe Tools CorporationInventors: Eiji Nakamura, Hidemitsu Takaoka, Yasuhiko Tashiro
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Publication number: 20050019612Abstract: The invention provides a coated cutting tool made of cemented carbide in which a hard coating layer has excellent wear resistance in high-speed cutting operation, wherein (a) a crystal orientation hysteresis layer which consists of a carbonitride compound layer and (b) a hard coating layer which consists of a layer of nitride compound and has a well defined crystal orientation and/or degree of crystallinity are formed on the surface of a cemented carbide substrate, preferably on the surface of a tungsten carbide based cemented carbide or titanium carbonitride based cermet by physical vapor deposition, wherein the crystal orientation hysteresis layer is deposited between the surface of a cemented carbide substrate and the hard coating layer. In one specific example, (a1) the carbonitride compound layer has an average thickness of 0.05 to 0.5 ?m and is preferably a Ti—Al carbonitride compound layer expressed by the composition formula as (Ti1?XAlX)(N1?YCY), wherein X ranges from 0.05 to 0.Type: ApplicationFiled: October 28, 2002Publication date: January 27, 2005Inventors: Kazunori Sato, Akihiro Kondo, Yusuke Tanaka, Yasuhiko Tashiro, Eiji Nakamura, Hidemitsu Takaoka
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Patent number: 5710383Abstract: A cutting tool composed of a carbonitride-type cermet having excellent wear resistance, characterized by having a microstructure comprising a homogeneous (Ti,W,Nb/Ta)CN phase, the grains of which have grown in shape of a cashew nut; and a Co--Ni alloy binder phase which is present as a dispersed phase between the grains of said homogeneous (Ti,W,Nb/Ta)CN phase. The cermet tools to be manufactured can exhibit more excellent wear resistance for a long time even in high-speed cuttings as well as ordinary cuttings as compared with the conventional cermet tools, and therefore, they can sufficiently satisfy demands for labor saving and energy saving, and further, factory automation systemizing, in relation to cutting work.Type: GrantFiled: November 26, 1996Date of Patent: January 20, 1998Inventor: Hidemitsu Takaoka