Patents by Inventor Yoshinari Nagami
Yoshinari Nagami 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: 11110526Abstract: A cutting insert according to the present disclosure includes a first surface, a second surface, a side surface, and a cutting edge. The first surface has a rake face continuous to the cutting edge. The cutting edge has a corner cutting edge, a flat cutting edge, and a main cutting edge. The rake face has a first rake face portion, a second rake face portion, and a third rake face portion, the first rake face portion being continuous to the flat cutting edge, the second rake face portion being continuous to the main cutting edge, the third rake face portion being continuous to the corner cutting edge and being located between the first rake face portion and the second rake face portion. The rake face is provided with a level difference portion.Type: GrantFiled: November 30, 2017Date of Patent: September 7, 2021Assignee: Sumitomo Electric Hardmetal Corp.Inventors: Yusuke Koike, Yasuyuki Kanada, Atsuhiko Maeta, Tomoyuki Fukuyama, Yoshinari Nagami, Yuta Morisaki
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Patent number: 10875105Abstract: A cutting edge has a corner cutting edge, a flat drag, and a main cutting edge. The rake surface has a first rake surface portion, a second rake surface portion, and a third rake surface portion. The first rake surface portion has a first inclined surface inclined at a first angle. The second rake surface portion has a second inclined surface inclined at a second angle greater than the first angle. The first end portion and the second end portion are higher than the reference surface in a direction perpendicular to the reference surface, and the main cutting edge extends so as to intersect the reference surface when viewed in a direction parallel to the reference surface. A first step portion rising from the third rake surface portion and continuous with the first rake surface portion is provided on the rake surface.Type: GrantFiled: December 27, 2016Date of Patent: December 29, 2020Assignee: Sumitomo Electric Hardmetal Corp.Inventors: Yusuke Koike, Yuta Morisaki, Yasuyuki Kanada, Atsuhiko Maeta, Tomoyuki Fukuyama, Yoshinari Nagami
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Patent number: 10875106Abstract: The cutting edge has: a corner cutting edge; a flat cutting edge continuous to a first end portion of the corner cutting edge; and a main cutting edge continuous to a second end portion of the corner cutting edge opposite to the first end portion of the corner cutting edge. The rake face has: a first rising surface portion; and a first rake face portion continuous to the first rising surface portion and located opposite to the corner cutting edge when viewed from the first rising surface portion. When viewed in a direction perpendicular to the reference surface, the first boundary includes a first line segment extending, from one of the flat cutting edge and the corner cutting edge, in a direction crossing a straight line extending along the main cutting edge.Type: GrantFiled: January 16, 2018Date of Patent: December 29, 2020Assignee: Sumitomo Electric Hardmetal Corp.Inventors: Shota Tsujimoto, Yusuke Koike, Yasuyuki Kanada, Atsuhiko Maeta, Tomoyuki Fukuyama, Yoshinari Nagami
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Publication number: 20190283148Abstract: A cutting insert according to the present disclosure includes a first surface, a second surface, a side surface, and a cutting edge. The first surface has a rake face continuous to the cutting edge. The cutting edge has a corner cutting edge, a flat cutting edge, and a main cutting edge. The rake face has a first rake face portion, a second rake face portion, and a third rake face portion, the first rake face portion being continuous to the flat cutting edge, the second rake face portion being continuous to the main cutting edge, the third rake face portion being continuous to the corner cutting edge and being located between the first rake face portion and the second rake face portion. The rake face is provided with a level difference portion.Type: ApplicationFiled: November 30, 2017Publication date: September 19, 2019Applicant: SUMITOMO ELECTRIC HARDMETAL CORP.Inventors: Yusuke Koike, Yasuyuki Kanada, Atsuhiko Maeta, Tomoyuki Fukuyama, Yoshinari Nagami, Yuta Morisaki
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Publication number: 20190255621Abstract: A cutting edge has a corner cutting edge, a flat drag, and a main cutting edge. The rake surface has a first rake surface portion, a second rake surface portion, and a third rake surface portion. The first rake surface portion has a first inclined surface inclined at a first angle. The second rake surface portion has a second inclined surface inclined at a second angle greater than the first angle. The first end portion and the second end portion are higher than the reference surface in a direction perpendicular to the reference surface, and the main cutting edge extends so as to intersect the reference surface when viewed in a direction parallel to the reference surface. A first step portion rising from the third rake surface portion and continuous with the first rake surface portion is provided on the rake surface.Type: ApplicationFiled: December 27, 2016Publication date: August 22, 2019Applicant: SUMITOMO ELECTRIC HARDMETAL CORP.Inventors: Yusuke Koike, Yuta Morisaki, Yasuyuki Kanada, Atsuhiko Maeta, Tomoyuki Fukuyama, Yoshinari Nagami
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Publication number: 20190176250Abstract: The cutting edge has: a corner cutting edge; a flat cutting edge continuous to a first end portion of the corner cutting edge; and a main cutting edge continuous to a second end portion of the corner cutting edge opposite to the first end portion of the corner cutting edge. The rake face has: a first rising surface portion; and a first rake face portion continuous to the first rising surface portion and located opposite to the corner cutting edge when viewed from the first rising surface portion. When viewed in a direction perpendicular to the reference surface, the first boundary includes a first line segment extending, from one of the flat cutting edge and the corner cutting edge, in a direction crossing a straight line extending along the main cutting edge.Type: ApplicationFiled: January 16, 2018Publication date: June 13, 2019Applicants: SUMITOMO ELECTRIC HARDMETAL CORP., SUMITOMO ELECTRIC HARDMETAL CORP.Inventors: Shota Tsujimoto, Yusuke Koike, Yasuyuki Kanada, Atsuhiko Maeta, Tomoyuki Fukuyama, Yoshinari Nagami
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Patent number: 10124425Abstract: To reduce burrs that may be formed at a corner portion of a machined surface in a face milling process, there is provided a cutting insert that does not tend to form burrs. A milling cutting insert includes cutting edges provided as ridges each defined by an upper or lower face and a side face that intersect each other, the cutting edges including a flat cutting edge. The cutting edge include a major cutting edge provided between adjacent ones of corner portions, the flat cutting edge provided at the corner portion, and a minor cutting edge provided between the major cutting edge and the flat cutting edge. A surface roughness of a side face that is continuous with the major cutting edge is higher than a surface roughness of a side face that is continuous with the minor cutting edge.Type: GrantFiled: October 15, 2013Date of Patent: November 13, 2018Assignee: SUMITOMO ELECTRIC HARDMETAL CORP.Inventors: Yoshinari Nagami, Atsuhiko Maeta
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Patent number: 9333567Abstract: An object is to provide a cutting insert for milling that has a minor cutting edge for wiping to achieve improved machined surface quality. A minor cutting edge 3 at a corner includes two circular cutting edge portions 3a and 3a joined to major cutting edges 2 on both sides of the corner and a straight cutting edge portion 3b located between the two circular cutting edge portions 3a. The cutting insert satisfies the following conditions: 0.05TA?L1?0.4TA, 0.1L1?L?0.5L1, and h?15 ?m, where TA is the radius of a circle inscribed inside the major cutting edges 2 as viewed in the thickness direction of the cutting insert, L1 is the length of the minor cutting edge 3 in the longitudinal direction of the straight cutting edge portion 3b, L is the length of the straight cutting edge portion 3b, and h is the height of the minor cutting edge 3.Type: GrantFiled: September 10, 2013Date of Patent: May 10, 2016Assignee: SUMITOMO ELECTRIC HARDMETAL CORP.Inventors: Atsuhiko Maeta, Kouki Matsubara, Katsuya Nakakihara, Yoshinari Nagami
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Publication number: 20150043981Abstract: To reduce burrs that may be formed at a corner portion of a machined surface in a face milling process, there is provided a cutting insert that does not tend to form burrs. A milling cutting insert includes cutting edges provided as ridges each defined by an upper or lower face and a side face that intersect each other, the cutting edges including a flat cutting edge. The cutting edge include a major cutting edge provided between adjacent ones of corner portions, the flat cutting edge provided at the corner portion, and a minor cutting edge provided between the major cutting edge and the flat cutting edge. A surface roughness of a side face that is continuous with the major cutting edge is higher than a surface roughness of a side face that is continuous with the minor cutting edge.Type: ApplicationFiled: October 15, 2013Publication date: February 12, 2015Inventors: Yoshinari Nagami, Atsuhiko Maeta
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Publication number: 20140193216Abstract: An object is to provide a cutting insert for milling that has a minor cutting edge for wiping to achieve improved machined surface quality. A minor cutting edge 3 at a corner includes two circular cutting edge portions 3a and 3a joined to major cutting edges 2 on both sides of the corner and a straight cutting edge portion 3b located between the two circular cutting edge portions 3a. The cutting insert satisfies the following conditions: 0.05 TA?L1?0.4 TA, 0.1 L1?L?0.5 L1, and h?15 ?m, where TA is the radius of a circle inscribed inside the major cutting edges 2 as viewed in the thickness direction of the cutting insert, L1 is the length of the minor cutting edge 3 in the longitudinal direction of the straight cutting edge portion 3b, L is the length of the straight cutting edge portion 3b, and h is the height of the minor cutting edge 3.Type: ApplicationFiled: September 10, 2013Publication date: July 10, 2014Applicant: SUMITOMO ELECTRIV HARDMETAL CORP.Inventors: Atsuhiko Maeta, Kouki Matsubara, Katsuya Nakakihara, Yoshinari Nagami