Patents by Inventor Sun Yong Ahn

Sun Yong Ahn 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: 11389883
    Abstract: The present disclosure relates to a cutting insert, and a cutting insert according to the present disclosure comprises: an upper surface and a lower surface oriented in opposite directions; a first and a second shorter side surface connecting the upper surface and the lower surface to each other and oriented in opposite directions; a first and a second longer side surfaces connecting the upper surface and the lower surface to each other, connecting the first and the second shorter side surfaces to each other, oriented in opposite directions, and being longer than the first and the second shorter side surfaces; and a through hole extending through the upper surface and the lower surface, wherein when viewed toward the upper surface, the first longer side surface has two side portions, each side portion having an inclined shape with reference to the center portion.
    Type: Grant
    Filed: August 31, 2018
    Date of Patent: July 19, 2022
    Assignee: KORLOY INC.
    Inventors: Young Nam Choi, Sang Yong Lee, Young Heum Kim, Sun Yong Ahn
  • Patent number: 11376675
    Abstract: The present invention relates to a cutting tool, which performs, like a drill or a ball end mill, cutting while rotating in a state in which the center of the tip end is in contact with a work material, and includes a wear-resistant layer formed at the tip end thereof, wherein a portion of the wear-resistant layer is selectively removed through tip end polishing from the center of the tip end of the drill or the ball end mill to a predetermined area, so as to restrain micro-brittle wear generated in an ultra-low speed region, and thus remarkably improving the cutting lifespan of the cutting tool such as the drill or the ball end mill.
    Type: Grant
    Filed: April 13, 2020
    Date of Patent: July 5, 2022
    Assignee: KORLOY INC.
    Inventors: Seung-Su Ahn, Je-Hun Park, Kyung-il Kim, Sung-Hyun Kim, Sung-Gu Lee, Sun-Yong Ahn
  • Patent number: 11359272
    Abstract: The present invention relates to a hard film having improved wear resistance and improved toughness. A hard film according to the present invention is formed by using a PVD method on a surface of a base material, wherein: the hard film includes a first hard layer and a second hard layer; the first hard layer has a thickness of approximately 0.1-3.0 ?m and is composed of Ti1-aAlaN (0.3?a?0.7), and has a single phase structure; and the second hard layer has a thickness of approximately 0.5-10 ?m and is composed of Ti1-a-bAlaMebN (0.3?a?0.7, 0?b?0.05, the Me being at least one selected from V, Zr, Si, Nb, Cr, Mo, Hf, Ta and W); according to an XRD phase analysis method, a ratio ([200]/[111]) of the intensity of a [200] peak to the intensity of a [111] peak is approximately 1.5 or higher; the second hard layer preferentially grows in a [200] direction; the [200] peak is located at approximately 42.7°-44.6° and is composed of three phases, and the [111] peak is located at approximately 37.0°-38.
    Type: Grant
    Filed: June 15, 2018
    Date of Patent: June 14, 2022
    Assignee: KORLOY INC.
    Inventors: Je-hun Park, Seung-su Ahn, Seong-mo Park, Jin-han Gwon, Kyoung-il Kim, Beom-sik Kim, Sun-yong Ahn
  • Patent number: 11141801
    Abstract: The present invention relates to a cutting tool, which performs, like a drill or a ball end mill, cutting while rotating in a state in which the center of the tip end is in contact with a work material, and includes a wear-resistant layer formed at the tip end thereof, wherein a portion of the wear-resistant layer is selectively removed through tip end polishing from the center of the tip end of the drill or the ball end mill to a predetermined area, so as to restrain micro-brittle wear generated in an ultra-low speed region, and thus remarkably improving the cutting lifespan of the cutting tool such as the drill or the ball end mill.
    Type: Grant
    Filed: April 13, 2020
    Date of Patent: October 12, 2021
    Assignee: KORLOY INC.
    Inventors: Seung-Su Ahn, Je-Hun Park, Kyung-il Kim, Sung-Hyun Kim, Sung-Gu Lee, Sun-Yong Ahn
  • Publication number: 20210071290
    Abstract: The present invention relates to a hard film having improved wear resistance and improved toughness. A hard film according to the present invention is formed by using a PVD method on a surface of a base material, wherein: the hard film includes a first hard layer and a second hard layer; the first hard layer has a thickness of approximately 0.1-3.0 ?m and is composed of Ti1-aAlaN (0.3?a?0.7), and has a single phase structure; and the second hard layer has a thickness of approximately 0.5-10 ?m and is composed of Ti1-a-bAlaMebN (0.3?a?0.7, 0?b?0.05, the Me being at least one selected from V, Zr, Si, Nb, Cr, Mo, Hf, Ta and W); according to an XRD phase analysis method, a ratio ([200]/[111]) of the intensity of a [200] peak to the intensity of a [111] peak is approximately 1.5 or higher; the second hard layer preferentially grows in a [200] direction; the [200] peak is located at approximately 42.7°-44.6° and is composed of three phases, and the [111] peak is located at approximately 37.0°-38.
    Type: Application
    Filed: June 15, 2018
    Publication date: March 11, 2021
    Inventors: Je-hun PARK, Seung-su AHN, Seong-mo PARK, Jin-han GWON, Kyoung-il KIM, Beom-sik KIM, Sun-yong AHN
  • Publication number: 20200338652
    Abstract: The present disclosure relates to a cutting insert, and a cutting insert according to the present disclosure comprises: an upper surface and a lower surface oriented in opposite directions; a first and a second shorter side surface connecting the upper surface and the lower surface to each other and oriented in opposite directions; a first and a second longer side surfaces connecting the upper surface and the lower surface to each other, connecting the first and the second shorter side surfaces to each other, oriented in opposite directions, and being longer than the first and the second shorter side surfaces; and a through hole extending through the upper surface and the lower surface, wherein when viewed toward the upper surface, the first longer side surface has two side portions, each side portion having an inclined shape with reference to the center portion.
    Type: Application
    Filed: August 31, 2018
    Publication date: October 29, 2020
    Applicant: KORLOY INC.
    Inventors: Young Nam CHOI, Sang Yong LEE, Young Heum KIM, Sun Yong AHN
  • Patent number: 10738376
    Abstract: A hard coating includes a thin film layer which has a total thickness of 0.5-10 ?m and has an overall composition of Al1-a-bTiaMebN (0.2<a?0.6, 0<b?0.15), where Me is a nitride constituent element having a thermal expansion coefficient of greater than 2.7×10?6/° C. and less than 9.35×10?6/° C., wherein the thin film layer has a structure in which a nano-multilayered-structure of thin layers A, B and C, thin layer B being disposed between thin layer A and thin layer C, is repeatedly laminated at least once.
    Type: Grant
    Filed: August 29, 2016
    Date of Patent: August 11, 2020
    Assignee: KORLOY INC.
    Inventors: Je-Hun Park, Beom-Sik Kim, Seung-Su Ahn, Kyoung-il Kim, Dong-Youl Lee, Sun-Yong Ahn, Young-Heum Kim
  • Publication number: 20200238403
    Abstract: The present invention relates to a cutting tool, which performs, like a drill or a ball end mill, cutting while rotating in a state in which the center of the tip end is in contact with a work material, and includes a wear-resistant layer formed at the tip end thereof, wherein a portion of the wear-resistant layer is selectively removed through tip end polishing from the center of the tip end of the drill or the ball end mill to a predetermined area, so as to restrain micro-brittle wear generated in an ultra-low speed region, and thus remarkably improving the cutting lifespan of the cutting tool such as the drill or the ball end mill.
    Type: Application
    Filed: April 13, 2020
    Publication date: July 30, 2020
    Applicant: KORLOY INC.
    Inventors: Seung-Su AHN, Je-Hun PARK, Kyung-il KIM, Sung-Hyun KIM, Sung-Gu LEE, Sun-Yong AHN
  • Publication number: 20200238404
    Abstract: The present invention relates to a cutting tool, which performs, like a drill or a ball end mill, cutting while rotating in a state in which the center of the tip end is in contact with a work material, and includes a wear-resistant layer formed at the tip end thereof, wherein a portion of the wear-resistant layer is selectively removed through tip end polishing from the center of the tip end of the drill or the ball end mill to a predetermined area, so as to restrain micro-brittle wear generated in an ultra-low speed region, and thus remarkably improving the cutting lifespan of the cutting tool such as the drill or the ball end mill.
    Type: Application
    Filed: April 13, 2020
    Publication date: July 30, 2020
    Applicant: KORLOY INC.
    Inventors: Seung-Su AHN, Je-Hun PARK, Kyung-il KIM, Sung-Hyun KIM, Sung-Gu LEE, Sun-Yong AHN
  • Patent number: 10711345
    Abstract: The present invention relates to a hard coating including an MT-TiCN layer and an ?-alumina layer which are formed by using a chemical vapor deposition method. A hard coating for cutting tools, which is a coating formed on a base material of a cutting tool formed of a hard material, the coating comprising: a TiCN layer; and an ?-alumina layer formed on the TiCN layer, wherein: the ?-alumina layer has a main peak (maximal strength peak) of (006) plane located between 20-40 degrees during a psi rocking analysis by an XRD; a residual stress in the ?-Al2O3 layer is ?0.9-0.4 GPa; the TiCN layer is composed of TiCxNyOz (x+y+z?1, x>0, y>0, z?0); a composition ratio of C/(C+N) is greater than or equal to 0.4 and smaller than 0.5; the ratio of TC(220)/TC(422) is smaller than 0.45; and the ratio of TC(220)/TC(311) is less than 0.45.
    Type: Grant
    Filed: May 30, 2017
    Date of Patent: July 14, 2020
    Assignee: KORLOY INC.
    Inventors: Seong-woo Cho, Dong-youl Lee, Jae-hoon Kang, Soon-yong Hong, Sun-yong Ahn, Young-heum Kim
  • Patent number: 10597758
    Abstract: A cemented carbide comprises particles including a tungsten carbide (WC) as a main component; a binder phase including cobalt (Co) as a main component; and particles including a carbide or a carbonitride of at least one selected from the group consisting of Group 4a, 5a, and 6a elements, or a solid solution thereof, wherein a cubic phase free layer (CFL), in which the carbide or the carbonitride is not formed, is formed from a surface of the cemented carbide to a depth of 5 ?m to 50 ?m.
    Type: Grant
    Filed: November 10, 2015
    Date of Patent: March 24, 2020
    Assignee: KORLOY INC.
    Inventors: Jung-wook Kim, Sung-Gu Lee, Yong-hyun Kim, Sun-yong Ahn
  • Patent number: 10556277
    Abstract: The technical objective of the present invention is to provide a double-sided cutting insert having a high feed rate, which can increase the edge strength and reduce the cutting load, and thus can be suitable for high feed rate processing.
    Type: Grant
    Filed: August 30, 2016
    Date of Patent: February 11, 2020
    Assignee: KORLOY INC.
    Inventors: Sang Yong Lee, Young Nam Choi, Jae Yeong Mun, Sun Yong Ahn
  • Publication number: 20200030885
    Abstract: The technical objective of the present invention is to provide a cutting insert cooling device capable of easily mounting a spraying member to a cutting tool while preventing the rotation thereof and eliminating the risk of losing a screw. To this end, the cutting insert cooling device according to the present invention, capable of spraying cooling water toward the cutting insert coupled to the cutting tool, comprises: a head part which forms the terminal end portion of the cutting tool and has a cooling water guide flow path part, and to which the cutting insert is coupled; a spraying member having a cooling water spouting flow path part to spray, toward the cutting insert, the cooling water guided through the cooling water guide flow path part; and an attaching and detaching unit that slides the spraying member to the head part so as to attach and detach the same.
    Type: Application
    Filed: March 14, 2018
    Publication date: January 30, 2020
    Applicant: KORLOY INC.
    Inventors: Jae Yeong MUN, Byung Hoon MIN, Sang Yong LEE, Young Nam CHOI, Sun Yong AHN, Young Heum KIM
  • Patent number: 10526712
    Abstract: A cutting tool comprises a base material which includes particles including a tungsten carbide (WC) as a main component, a binder phase including cobalt (Co) as a main component, and particles including a carbide or a carbonitride of at least one selected from the group consisting of Group 4a, 5a, and 6a elements, or a solid solution thereof; and a hard film formed on the base material, wherein the hard film comprises at least an alumina layer, a cubic phase free layer (CFL), in which the carbide or the carbonitride is not formed, is formed from a surface of the base material to a depth of 10 ?m to 50 ?m, and a Co content of a surface of the CFL is 80% or more of a maximum Co content of the CFL.
    Type: Grant
    Filed: November 10, 2015
    Date of Patent: January 7, 2020
    Assignee: KORLOY INC.
    Inventors: Yong-hyun Kim, Jung-wook Kim, Sung-Gu Lee, Sun-Yong Ahn
  • Patent number: 10279401
    Abstract: Provided are a cutting insert and a tool holder on which the cutting insert is provided. The cutting insert includes a circular upper surface, a circular lower surface, a cylindrical lateral surface for connecting the upper surface and the lower surface, an upper cutting edge formed between the upper surface and the lateral surface, a lower cutting edge formed between the lower surface and the lateral surface, and a plurality of rotation-preventing parts provided at the lateral surface so as to prevent the cutting insert from rotating with respect to the tool holder. Each rotation preventing part includes an inner curved surface recessed toward the center of the lateral surface and convexly rounded so as to form concentric circles in conjunction with the lateral surface, and a stepped rotation-preventing surface parallel to the axial direction of the insert and connecting the inner curved surface and the lateral surface.
    Type: Grant
    Filed: July 21, 2015
    Date of Patent: May 7, 2019
    Assignee: KORLOY INC.
    Inventors: Sang-Yong Lee, Ki-Chan Nam, Nam-Sun Lee, Kane-Hee Lee, Sun-Yong Ahn, Young-Heum Kim
  • Patent number: 10259055
    Abstract: The purpose of the present invention is to provide a cutting insert capable of reducing cutting load and enhancing squareness.
    Type: Grant
    Filed: March 3, 2016
    Date of Patent: April 16, 2019
    Assignee: KORLOY INC.
    Inventors: Young-nam Choi, Sang-yong Lee, Sun-yong Ahn
  • Patent number: 10207339
    Abstract: A cutting insert for an indexable drill according to the present disclosure may be used for external cutting or internal cutting depending on a position and a direction in which the cutting insert is installed even though a single type of cutting insert is provided. In addition, the cutting insert for an indexable drill according to the present disclosure has a section of the internal cutting edge which is involved in a cutting process or a section of the internal cutting edge which is not involved in the cutting process, which are clearly distinguished from each other, and as a result, the cutting insert may be rotated and mounted, and reversed and mounted on a drill body, such that maximum eight corners may be used to perform a cutting process.
    Type: Grant
    Filed: November 7, 2014
    Date of Patent: February 19, 2019
    Assignee: KORLOY INC
    Inventors: Chan Kyu Park, Hong Seung Son, Sung Hyun Kim, Hyo Joon Lim, Sun Yong Ahn, Young Heum Kim
  • Publication number: 20180333791
    Abstract: The technical objective of the present invention is to provide a double-sided cutting insert having a high feed rate, which can increase the edge strength and reduce the cutting load, and thus can be suitable for high feed rate processing.
    Type: Application
    Filed: August 30, 2016
    Publication date: November 22, 2018
    Applicant: KORLOY INC.
    Inventors: Sang Yong LEE, Young Nam CHOI, Jae Yeong MUN, Sun Yong AHN
  • Patent number: 10112241
    Abstract: A technical object of the present disclosure is to provide an insert, which can maintain rigidity thereof regardless of a clearance angle of a clearance surface that forms a circular cutting edge. To this end, the insert according to the present disclosure includes a circular upper surface, a circular lower surface, and a clearance surface portion connecting the upper surface and the lower surface. The clearance surface portion is divided into first and second clearance surfaces along a circumference thereof, by a first wave line that forms a waveform of valleys facing the lower surface and mounts facing the upper surface.
    Type: Grant
    Filed: November 7, 2014
    Date of Patent: October 30, 2018
    Assignee: KORLOY INC.
    Inventors: Sang-Yong Lee, Ki-Chan Nam, Nam-Sun Lee, Kane-Hee Lee, Sun-Yong Ahn, Young-Heum Kim
  • Patent number: 10105772
    Abstract: A technical object is to provide an insert capable of preventing escaping of the insert from an assembly of the insert and a tool holder. To this purpose, the insert includes an insert body, and a holder fastening portion provided in the insert body to be fastened to the tool holder, in which the holder fastening portion includes one or more fastening holes formed through the insert body from an upper surface to a lower surface, and one or more locking recesses formed by being recessed in a lower surface periphery of the insert body.
    Type: Grant
    Filed: November 7, 2014
    Date of Patent: October 23, 2018
    Assignee: KORLOY INC.
    Inventors: Sang-Yong Lee, Nam-Sun Lee, Ki-Chan Nam, Kane-Hee Lee, Sun-Yong Ahn