Patents by Inventor Chikako Kojima
Chikako Kojima 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).
-
Patent number: 8968866Abstract: A surface-coated cutting tool excellent in wear resistance is provided. The surface-coated cutting tool of the present invention includes a base material and a coating formed on the base material. The coating includes an inner layer and an outer layer. The inner layer is a single layer or a multilayer stack constituted of two or more layers made of at least one element selected from the group consisting of group IVa elements, group Va elements, group VIa elements in the periodic table, Al, and Si, or a compound of at least one element selected from this group and at least one element selected from the group consisting of carbon, nitrogen, oxygen, and boron. The outer layer includes ?-aluminum oxide as a main component and exhibits an equivalent peak intensity PR(024) of a (024) plane of x-ray diffraction of larger than 1.3.Type: GrantFiled: December 5, 2011Date of Patent: March 3, 2015Assignee: Sumitomo Electric Hardmetal Corp.Inventors: Chikako Kojima, Yoshio Okada, Hideaki Kanaoka, Hiroyuki Morimoto, Anongsack Paseuth, Erika Iwai
-
Patent number: 8945707Abstract: The surface-coated cutting tool of the present invention is characterized in that a region of 10 ?m in a surface of the base material from point a? to point b? has two to seven cracks with a width of not more than 200 nm, or two to ten pores are present per length of 10 ?m in the surface of the base material from point a? to point b?, where points a? and b? are points defined respectively by lines drawn perpendicularly from points a and b to the surface of the base material where point a is a position located away from an edge ridgeline toward a rake face by distance La and point b is a position located away from the edge ridgeline toward a flank face by distance Lb.Type: GrantFiled: December 5, 2011Date of Patent: February 3, 2015Assignee: Sumitomo Electric Hardmetal Corp.Inventors: Hideaki Kanaoka, Yoshio Okada, Chikako Kojima, Anongsack Paseuth, Erika Iwai, Hiroyuki Morimoto
-
Publication number: 20140248968Abstract: An object of improvement is a threading tool that includes multiple cutting edges 3-1 to 3-n (where n is 5 in the drawings) disposed side by side and that performs threading successively using the multiple cutting edges to form a thread. At least one of the cutting edges of the tool except a finishing edge 3-5 is deviated in an opposite-to-feed-direction direction of the tool (may instead be the feed direction).Type: ApplicationFiled: October 3, 2012Publication date: September 4, 2014Applicant: Sumitomo Electric Hardmetal Corp.Inventors: Chikako Kojima, Mitsuhide Okano, Reizo Murakami
-
Patent number: 8801817Abstract: A surface-coated cutting tool according to the present invention includes a base material and a coating film formed on the base material. The coating film includes at least one TiCN layer. The TiCN layer has a columnar crystal region. The columnar crystal region is characterized by having a composition of TiCxNy (in which 0.65?x/(x+y)?0.90) and having a (422) plane having a plane spacing of 0.8765 ? to 0.8790 ?.Type: GrantFiled: July 4, 2011Date of Patent: August 12, 2014Assignee: Sumitomo Electric Hardmetal Corp.Inventors: Anongsack Paseuth, Yoshio Okada, Hideaki Kanaoka, Chikako Kojima, Erika Iwai
-
Patent number: 8741428Abstract: A surface-coated cutting tool according to the present invention includes a base material and a coating film formed on the base material. The coating film includes at least one TiCN layer. The TiCN layer has a columnar crystal region. The columnar crystal region is characterized by having a composition of TiCxNy(in which 0.65?x/(x+y)?0.90), having a (422) plane having a plane spacing of 0.8765 ? to 0.8790 ? and having TC (220) showing a maximum value in an orientation index TC (hkl).Type: GrantFiled: July 4, 2011Date of Patent: June 3, 2014Assignee: Sumitomo Electric Hardmetal Corp.Inventors: Anongsack Paseuth, Yoshio Okada, Chikako Kojima, Hideaki Kanaoka, Erika Iwai, Hiroyuki Morimoto
-
Publication number: 20130279998Abstract: A surface-coated cutting tool excellent in wear resistance is provided. The surface-coated cutting tool of the present invention includes a base material and a coating formed on the base material. The coating includes an inner layer and an outer layer. The inner layer is a single layer or a multilayer stack constituted of two or more layers made of at least one element selected from the group consisting of group IVa elements, group Va elements, group VIa elements in the periodic table, Al, and Si, or a compound of at least one element selected from this group and at least one element selected from the group consisting of carbon, nitrogen, oxygen, and boron. The outer layer includes ?-aluminum oxide as a main component and exhibits an equivalent peak intensity PR(024) of a (024) plane of x-ray diffraction of larger than 1.3.Type: ApplicationFiled: December 5, 2011Publication date: October 24, 2013Applicant: SUMITOMO ELECTRIC HARDMETAL CORP.Inventors: Chikako Kojima, Yoshio Okada, Hideaki Kanaoka, Hiroyuki Morimoto, Anongsack Paseuth, Erika Iwai
-
Publication number: 20130164527Abstract: A surface-coated cutting tool according to the present invention includes a base material and a coating film formed on the base material. The coating film includes at least one TiCN layer. The TiCN layer has a columnar crystal region. The columnar crystal region is characterized by having a composition of TiCxNy (in which 0.65?x/(x+y) 0.90), having a (422) plane having a plane spacing of 0.8765 ? to 0.8790 ? and having TC (220) showing a maximum value in an orientation index TC (hkl).Type: ApplicationFiled: July 4, 2011Publication date: June 27, 2013Applicant: Sumitomo Electric Hardmetal Corp.Inventors: Anongsack Paseuth, Yoshio Okada, Chikako Kojima, Hideaki Kanaoka, Erika Iwai, Hiroyuki Morimoto
-
Publication number: 20130101365Abstract: The surface-coated cutting tool of the present invention is characterized in that a region of 10 ?m in a surface of the base material from point a? to point b? has two to seven cracks with a width of not more than 200 nm, or two to ten pores are present per length of 10 ?m in the surface of the base material from point a? to point b?, where points a? and b? are points defined respectively by lines drawn perpendicularly from points a and b to the surface of the base material where point a is a position located away from an edge ridgeline toward a rake face by distance La and point b is a position located away from the edge ridgeline toward a flank face by distance Lb.Type: ApplicationFiled: December 5, 2011Publication date: April 25, 2013Applicant: SUMITOMO ELECTRIC HARDMETAL CORP.Inventors: Hideaki Kanaoka, Yoshio Okada, Chikako Kojima, Anongsack Paseuth, Erika Iwai, Hiroyuki Morimoto
-
Publication number: 20130045057Abstract: A surface-coated cutting tool excellent in wear resistance is provided. The surface-coated cutting tool of the present invention includes a base material and a coating formed on the base material. The coating includes an inner layer and an outer layer. The inner layer is a single layer or a multilayer stack constituted of two or more layers made of at least one element selected from the group consisting of group IVa elements, group Va elements, group VIa elements in the periodic table, Al, and Si, or a compound of at least one element selected from this group and at least one element selected from the group consisting of carbon, nitrogen, oxygen, and boron. The outer layer includes ?-aluminum oxide as a main component and exhibits an equivalent peak intensity PR(024) of a (024) plane of x-ray diffraction of larger than 1.3.Type: ApplicationFiled: December 5, 2011Publication date: February 21, 2013Applicant: SUMITOMO ELECTRIC HARDMETAL CORP.Inventors: Chikako Kojima, Yoshio Okada, Hideaki Kanaoka, Hiroyuki Morimoto, Anongsack Paseuth, Erika Iwai
-
Publication number: 20120275870Abstract: A surface-coated cutting tool according to the present invention includes a base material and a coating film formed on the base material. The coating film includes at least one TiCN layer. The TiCN layer has a columnar crystal region. The columnar crystal region is characterized by having a composition of TiCxNy (in which 0.65?x/(x+y)?0.90) and having a (422) plane having a plane spacing of 0.8765 ? to 0.8790 ?.Type: ApplicationFiled: July 4, 2011Publication date: November 1, 2012Applicant: Sumitomo Electric Hardmetal Corp.Inventors: Anongsack Paseuth, Yoshio Okada, Hideaki Kanaoka, Chikako Kojima, Erika Iwai
-
Publication number: 20120270037Abstract: A surface-coated cutting tool according to the present invention includes a base material and a coating film formed on the base material. The coating film includes at least one TiCN layer. The TiCN layer has a columnar crystal region. The columnar crystal region is characterized by having a composition of TiCxNy (in which 0.65?x/(x+y) 0.90), having a (422) plane having a plane spacing of 0.8765 ? to 0.8790 ? and having TC (220) showing a maximum value in an orientation index TC (hkl).Type: ApplicationFiled: July 4, 2011Publication date: October 25, 2012Applicant: Sumitomo Electric Hardmetal Corp.Inventors: Anongsack Paseuth, Yoshio Okada, Chikako Kojima, Hideaki Kanaoka, Erika Iwai, Hiroyuki Morimoto
-
Patent number: 8231312Abstract: A surface-coated cutting tool includes a coating layer (108) formed on a substrate (104), wherein assuming that the average thickness of the coating layer (108) on a first surface (106) and a second surface (107) of the substrate (104) is A, a difference between the maximum and minimum thicknesses of the coating layer (108) is larger than 0.04×A. Also, a surface-coated cutting tool includes a coating layer (108) formed on a substrate (104), wherein assuming that the average thickness of the coating layer (108) on a first surface (106) of the substrate (104) is B1, and the average thickness of the coating layer (108) on a second surface (107) of the substrate (104) is B2, a value obtained by dividing an absolute difference value between B1 and B2 by a larger value of B1 and B2 is larger than 0.04.Type: GrantFiled: August 8, 2007Date of Patent: July 31, 2012Assignee: Sumitomo Electric Hardmetal Corp.Inventors: Naoya Omori, Yoshio Okada, Minoru Itoh, Shinya Imamura, Susumu Okuno, Hiroyuki Morimoto, Chikako Kojima
-
Patent number: 7967533Abstract: A surface-coated cutting tool includes a coating layer (108) formed on a substrate (104), wherein assuming that the average thickness of the coating layer (108) on a first surface (106) and a second surface (107) of the substrate (104) is A, a difference between the maximum and minimum thicknesses of the coating layer (108) is 0.04×A or less. Also, a surface-coated cutting tool includes a coating layer (108) formed on a substrate (104), wherein assuming that the average thickness of the coating layer (108) on a first surface (106) of the substrate (104) is B1, and the average thickness of the coating layer (108) on a second surface (107) of the substrate (104) is B2, a value obtained by dividing an absolute difference value between B1 and B2 by a larger value of B1 and B2 is 0.04 or less.Type: GrantFiled: August 8, 2007Date of Patent: June 28, 2011Assignee: Sumitomo Electric Hardmetal Corp.Inventors: Naoya Omori, Yoshio Okada, Minoru Itoh, Shinya Imamura, Susumu Okuno, Hiroyuki Morimoto, Chikako Kojima
-
Publication number: 20100232893Abstract: An indexable insert according to the present invention includes a substrate and a coating layer formed on the substrate, the coating layer is formed of a plurality of layers including at least a TiCN layer, at least one of the plurality of layers is provided with compressive residual stress, the TiCN layer is mainly composed of TiCN and has highest peak intensity in a (422) plane and second peak intensity in a (311) plane in X-ray diffraction, and a ratio of peak intensity I(422)/I(311) between peak intensity I(422) of the (422) plane and peak intensity I(311) of the (311) plane is not lower than 1.1 and not higher than 10.Type: ApplicationFiled: October 8, 2008Publication date: September 16, 2010Inventors: Shinya Imamura, Naoya Omori, Yoshio Okada, Chikako Kojima, Susumu Okuno
-
Publication number: 20090162152Abstract: A surface-coated cutting tool includes a coating layer (108) formed on a substrate (104), wherein assuming that the average thickness of the coating layer (108) on a first surface (106) and a second surface (107) of the substrate (104) is A, a difference between the maximum and minimum thicknesses of the coating layer (108) is larger than 0.04×A. Also, a surface-coated cutting tool includes a coating layer (108) formed on a substrate (104), wherein assuming that the average thickness of the coating layer (108) on a first surface (106) of the substrate (104) is B1, and the average thickness of the coating layer (108) on a second surface (107) of the substrate (104) is B2, a value obtained by dividing an absolute difference value between B1 and B2 by a larger value of B1 and B2 is larger than 0.04.Type: ApplicationFiled: August 8, 2007Publication date: June 25, 2009Inventors: Naoya Omori, Yoshio Okada, Minoru Itoh, Shinya Imamura, Susumu Okuno, Hiroyuki Morimoto, Chikako Kojima
-
Publication number: 20090097933Abstract: A surface-coated cutting tool includes a coating layer (108) formed on a substrate (104), wherein assuming that the average thickness of the coating layer (108) on a first surface (106) and a second surface (107) of the substrate (104) is A, a difference between the maximum and minimum thicknesses of the coating layer (108) is 0.04×A or less. Also, a surface-coated cutting tool includes a coating layer (108) formed on a substrate (104), wherein assuming that the average thickness of the coating layer (108) on a first surface (106) of the substrate (104) is B1, and the average thickness of the coating layer (108) on a second surface (107) of the substrate (104) is B2, a value obtained by dividing an absolute difference value between B1 and B2 by a larger value of B1 and B2 is 0.04 or less.Type: ApplicationFiled: August 8, 2007Publication date: April 16, 2009Applicant: Sumitomo Electric Hardmetal CorpInventors: Naoya Omori, Yoshio Okada, Minoru Itoh, Shinya Imamura, Susumu Okuno, Hiroyuki Morimoto, Chikako Kojima