Patents Assigned to Korloy, Inc.
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Patent number: 10112241Abstract: 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: GrantFiled: November 7, 2014Date of Patent: October 30, 2018Assignee: KORLOY INC.Inventors: Sang-Yong Lee, Ki-Chan Nam, Nam-Sun Lee, Kane-Hee Lee, Sun-Yong Ahn, Young-Heum Kim
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Patent number: 10105772Abstract: 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: GrantFiled: November 7, 2014Date of Patent: October 23, 2018Assignee: KORLOY INC.Inventors: Sang-Yong Lee, Nam-Sun Lee, Ki-Chan Nam, Kane-Hee Lee, Sun-Yong Ahn
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Patent number: 10099298Abstract: The present disclosure relates to a cutting insert and an indexable drill. The cutting insert and the indexable drill according to the present disclosure are configured such that when the cutting insert is mounted on the indexable drill, the cutting insert is easily inserted into the indexable drill at the initial time, and strong coupling force is implemented between the indexable drill and the cutting insert at a point of time at which the cutting insert is completely mounted. In addition, the cutting insert, according to the present disclosure, has excellent rigidity, when compared to cutting inserts in the related art that perform identical/similar cutting processing, since a portion, which is weak in rigidity, is provided as a thick portion.Type: GrantFiled: September 2, 2014Date of Patent: October 16, 2018Assignee: KORLOY INCInventors: Hong Seung Son, Chan Kyu Park, Hyo Joon Lim, Sung Hyun Kim, Sun Yong Ahn, Young Heum Kim
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Patent number: 10086435Abstract: A cutting insert for high-efficiency cutting is disclosed. The cutting insert includes an upper surface (110a), a lower surface (HOb), side surfaces (114) and corner side surfaces (116), which connect the side surfaces to each other. A circular opening is formed through the central portions of the upper and lower surfaces. In the cutting insert, cutting edges are formed by respective junctions between one of the upper and lower surfaces and the side surfaces and between one of the upper and lower surfaces and the corner side surfaces. The cutting edges comprise three corner cutting edges (122), six major cutting edges (124), which extend from opposite ends of the corner cutting edges towards the neighbor corner cutting edges, and three minor cutting edges (126), which are connected between the major cutting edges. Furthermore, the cutting edges may be formed on both the upper surface and the lower surface.Type: GrantFiled: December 17, 2007Date of Patent: October 2, 2018Assignee: Korloy Inc.Inventors: Wook Jung Sung, In Sik Sung
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Patent number: 10086447Abstract: A cutting insert and a cutting tool having same are provided. The cutting insert includes an upper surface, a lower surface having a flat surface, side surfaces connecting to each of the upper surface and the lower surface, and cutting edges being formed by the upper surface and the side surfaces. A first cutting edge among the cutting edges is inclined downward. A major side surface among the side surfaces comprises a first major side surface connected to the upper surface so as to constitute the first cutting edge, and a second major side surface connected to the first major side surface and the lower surface. The first major side surface has a reversely positive surface, and the second major side surface has a reversely positive surface or a negative surface, and a minor side surface among the side surfaces has a positive surface or a negative surface.Type: GrantFiled: April 29, 2015Date of Patent: October 2, 2018Assignee: KORLOY INC.Inventors: Ki-Chan Nam, Young-Heum Kim, Kane-Hee Lee, Hyo-San Kim
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Publication number: 20180258525Abstract: 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(422) is less than 0.45.Type: ApplicationFiled: May 30, 2017Publication date: September 13, 2018Applicant: KORLOY INC.Inventors: Seong-woo CHO, Dong-youl LEE, Jae-hoon KANG, Soon-yong HONG, Sun-yong AHN, Young-heum KIM
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Publication number: 20180245201Abstract: 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: ApplicationFiled: August 29, 2016Publication date: August 30, 2018Applicant: KORLOY INC.Inventors: Je-Hun PARK, Beom-Sik KIM, Seung-Su AHN, Kyoung-il KIM, Dong-Youl LEE, Sun-Yong AHN, Young-Heum KIM
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Publication number: 20180200808Abstract: The technical objective of the present invention is to provide a cutting insert that has an improved fastening property with a cutting tool, thereby preventing reduction of the service life. To this end, the cutting insert according to the present invention has three corners along the circumference thereof; an upper main cutting edge, which is formed on the edge between the upper surface and the first side surface, and an upper sub cutting edge, which is formed on the edge between the upper surface and the second side surface, are continuously disposed between respective corners; the lower surface has the same shape as that of the upper surface; and the angle defined between the upper main cutting edge and the upper sub cutting edge, which are placed on both sides with reference to each corner, is larger than or equal to 85° and is smaller than 90°.Type: ApplicationFiled: May 27, 2016Publication date: July 19, 2018Applicant: KORLOY INC.Inventors: Nam-seon LEE, Ki-chan NAM, Kane-hee LEE, Hyo-san KIM, Young-heum KIM
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Publication number: 20180085836Abstract: The purpose of the present invention is to provide a cutting insert capable of reducing cutting load and enhancing squareness.Type: ApplicationFiled: March 3, 2016Publication date: March 29, 2018Applicant: KORLOY INC.Inventors: Young-nam CHOI, Sang-yong LEE, Sun-yong AHN
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Patent number: 9855608Abstract: Disclosed is a hard coating film formed on a hard base material such as cemented carbide. The hard coating film has a nanoscale multilayered structure to have improved oxidation resistance and wear resistance. The hard coating film is a hard coating film formed on the base material. The first layer is composed of a TiAl nitride having a composition of Ti1-aAla (0.3?a?0.7), and the second layer has a nanoscale multilayered structure or a structure in which the nanoscale multilayered structure is repeatedly laminated at least two times, the nanoscale multilayered structure including a thin layer A composed of an AlTiSi nitride, a thin layer B, a thin layer C composed of a AlCr nitride, and a thin layer D having thicknesses of 3 nm to 20 nm. The thin film B and the thin film D are composed of a TiAl nitride.Type: GrantFiled: August 27, 2014Date of Patent: January 2, 2018Assignee: KORLOY INC.Inventors: Je-Hun Park, Seung-Su Ahn, Sung-Gu Lee, Seoun-Yong Ahn, Young Heum Kim
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Patent number: 9808871Abstract: The objective of the present invention is to provide a cutting insert which reduces cutting load and can be accurately positioned at a coupling part of a cutting tool even if cutting edges are broken or deformed. To this end, the cutting insert of the present invention includes an upper surface, a lower surface, a plurality of lateral surfaces connecting the upper surface with the lower surface, and a plurality of upper cutting edges formed between the plurality of lateral surfaces and the upper surface.Type: GrantFiled: April 29, 2013Date of Patent: November 7, 2017Assignee: KORLOY INC.Inventors: Byung-Sun Choi, Sun-Kyoo Lee, Taeg-Won Lee, Dong-Ryong Ji, Dong-Bok Park
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Publication number: 20170306500Abstract: 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: ApplicationFiled: November 10, 2015Publication date: October 26, 2017Applicant: KORLOY INC.Inventors: Yong-hyun KIM, Jung-wook KIM, Sung-Gu LEE, Sun-Yong AHN
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Publication number: 20170306455Abstract: 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: ApplicationFiled: November 10, 2015Publication date: October 26, 2017Applicant: KORLOY INC.Inventors: Jung-wook KIM, Sung-Gu LEE, Yong-hyun KIM, Sun-yong AHN
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Publication number: 20170259356Abstract: 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: ApplicationFiled: July 21, 2015Publication date: September 14, 2017Applicant: KORLOY INC.Inventors: Sang-Yong LEE, Ki-Chan NAM, Nam-Sun LEE, Kane-Hee LEE, Sun-Yong AHN, Young-Heum KIM
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Patent number: 9752230Abstract: Disclosed is an alpha alumina (?-Al2O3) thin film comprising the lower layer formed on the base material made from cemented carbide; and the ?-Al2O3 thin film layer formed on the lower layer, wherein when the ?-Al2O3 thin film layer is divided, from the total thickness (T) thereof, into a D1 layer which is from an interface layer to 0.15T, a D2 layer which is from 0.15T to 0.4T, and a D3 layer which is from 0.4T to 1T, an S1 (D3 layer grain size/D1 layer grain size) is 2-5.5 and an S2 (D2 layer grain size/D1 layer grain size) is 1.5-4.Type: GrantFiled: November 26, 2014Date of Patent: September 5, 2017Assignee: KORLOY INC.Inventors: Jae Hoon Kang, Dong Youl Lee, Jung Wook Kim, Han Sung Kim, Sung Gu Lee, Jin Woo Ahn, Sun Yong Ahn
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Publication number: 20170157684Abstract: A cutting insert and a cutting tool having same are provided. The cutting insert includes an upper surface, a lower surface having a flat surface, side surfaces connecting to each of the upper surface and the lower surface, and cutting edges being formed by the upper surface and the side surfaces. A first cutting edge among the cutting edges is inclined downward. A major side surface among the side surfaces comprises a first major side surface connected to the upper surface so as to constitute the first cutting edge, and a second major side surface connected to the first major side surface and the lower surface. The first major side surface has a reversely positive surface, and the second major side surface has a reversely positive surface or a negative surface, and a minor side surface among the side surfaces has a positive surface or a negative surface.Type: ApplicationFiled: April 29, 2015Publication date: June 8, 2017Applicant: KORLOY INC.Inventors: Ki-Chan NAM, Young-Heum KIM, Kane-Hee LEE, Hyo-San KIM
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Publication number: 20170144228Abstract: A cutting insert and a cutting tool having same. The cutting insert includes: an upper surface; a lower surface having a flat surface; a fastening hole penetrating the upper surface and the lower surface; side surfaces each connecting to the upper surface and the lower surface; and cutting edges formed by the upper surface and the side surfaces. A first cutting edge is inclined downward. A major side surface comprises a first major side surface connected to the upper surface so as to constitute the first cutting edge, and a second major side surface connected to the first major side surface and the lower surface. A minor side surface comprises a first minor side surface connected to the upper surface so as to constitute a second cutting edge, and a third minor side surface connected to the upper surface and the lower surface.Type: ApplicationFiled: April 24, 2015Publication date: May 25, 2017Applicant: KORLOY INC.Inventors: Ki-Chan NAM, Young-Heum KIM, Hyo-San KIM
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Publication number: 20170113286Abstract: An insert in which a cutting edge is formed only between an upper surface and a side surface. The insert comprises: three or more corners along a perimeter; a main cutting edge formed on an edge between an upper surface and a main side surface, and a sub cutting edge formed on an edge between the upper surface and a sub side surface, wherein the main cutting edge and the sub cutting edge are placed in succession between the corners; and a flat lower surface. The main cutting edge forms an inclination angle such that a height decreases gradually in a direction toward the sub cutting edge. The main side surface is formed by a first end main side surface and a second end main side surface. The sub side surface is formed by a first end sub side surface and a second end sub side surface.Type: ApplicationFiled: April 15, 2015Publication date: April 27, 2017Applicant: KORLOY INC.Inventors: Ki-Chan NAM, Kane-Hee LEE, Young-Heum KIM
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Patent number: 9623496Abstract: The present invention relates to an insert for slot milling, and more specifically, to an insert for slot milling which can smoothly form a front end surface of a concave portion of a slot formed at a cutting target, and provides a safe use thereof by preventing the erroneous installation of cutting inserts coupled with insert-installation seats on both sides of a milling cutter body to prevent damage of the cutting inserts and the milling cutter. To this end, the present invention is characterized in that the plurality of cutting inserts are provided around the slot milling cutter body, one of two cutting inserts protrudes with respect to one side of the milling cutter body and the other protrudes with respect to the opposite side of the milling cutter body, and two cutting inserts are formed with different structures to prevent the erroneous installation thereof on the insert-installation seats prepared on both sides of the milling cutter body.Type: GrantFiled: October 25, 2012Date of Patent: April 18, 2017Assignee: KORLOY, INCInventors: Jung Woo Lee, Taeg Won Lee, Byung Sun Choi, Dong Ryong Ji, Dong Bok Park
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Patent number: 9623486Abstract: The purpose of the present invention is to provide a cutting insert which can minimize friction with a chip and maximize heat-radiating performance. To this end, the present invention provides a cutting insert comprising: an upper surface; a lower surface; a plurality of lateral surfaces for connecting the upper surface with the lower surface; a main cutting edge formed between the lateral surface and the upper surface; and a main cutting edge land and a main cutting edge incline formed in series between the main cutting edge and the upper surface, wherein the main cutting edge incline has a first wavy shape in which two or more incline convex parts and two or more incline concave parts are repeated from the main cutting edge land toward the upper surface.Type: GrantFiled: April 23, 2013Date of Patent: April 18, 2017Assignee: KORLOY INC.Inventors: Ki-Chan Nam, Wook-Jung Sung, Sang-Yong Lee, Young-Jun Park