# US 8,784,014 B2 · Cutting insert, cutting tool, and method of manufacturing machined product using the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,784,014 B2 - Document ID: US8784014B2 - Status: Granted - Kind: B2 - Application number: 13/504,606 - Filed: 2010-10-28 - Published: 2012-08-23 - Granted: 2014-07-22 - Earliest claimed: 2009-10-29 - Assignees: KYOCERA Corporation - Applicants: Chie Onodera - Inventors: Chie Onodera - Web page: https://patentgrep.com/patent/US8784014B2 ## CPC - B23B 27/045: {with chip-breaking arrangements} - B23B 2200/081: with projections - B23B 2200/321: by chip breaking projections - Y10T 82/10: Process of turning - Y10T 407/2268: with chip breaker, guide or deflector - Y10T 407/235: with integral chip breaker, guide or deflector - Y10T 407/24: with chip breaker, guide or deflector - B23B: TURNING; BORING (arrangements for copying or controlling B23Q) - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract A cutting insert according to an embodiment of the present invention includes an upper surface; a side surface; and a cutting edge located at an intersection region of the upper surface and the side surface. The upper surface includes a rake surface continuous with the cutting edge; and a rising surface inclined and lying at a higher position as going inward from the rake surface. The rake surface includes a pair of first raised parts respectively extending inward from near both ends of the cutting edge in a top view; and a second raised part extending from one of the pair of first raised parts to the other. A cutting tool including the cutting insert, and a method of manufacturing a machined product by using the cutting tool are also provided. ## Claims ### Claim 1 A cutting insert, comprising: an upper surface; a side surface; and a cutting edge located at an intersection region of the upper surface and the side surface, wherein the upper surface comprises a rake surface continuous with the cutting edge, and a rising surface inclined and lying at a higher position as going inward from the rake surface, and the rake surface comprises a pair of first raised parts respectively extending inward from near both ends of the cutting edge in a top view, and a second raised part extending from one of the pair of first raised parts to the other. ### Claim 2 (depends on 1) The cutting insert according to claim 1, wherein a ridge portion of the second raised part is parallel to the cutting edge in a top view. ### Claim 3 (depends on 1) The cutting insert according to claim 1, wherein the second raised part comprises a first inclined surface inclined at an inclination angle α1 and lying at a higher position as going from the cutting edge to the ridge portion of the second raised part, and a second inclined surface inclined at an inclination angle α2 and lying at a lower position as going from the ridge portion of the second raised part to the rising surface. ### Claim 4 (depends on 3) The cutting insert according to claim 3, wherein the inclination angle α1 of the first inclined surface is larger than the inclination angle α2 of the second inclined surface. ### Claim 5 (depends on 4) The cutting insert according to claim 4, wherein a rising angle γ of the rising surface is larger than the inclination angle α1 of the first inclined surface. ### Claim 6 (depends on 1) The cutting insert according to claim 1, wherein the ridge portion of the second raised part is located below a virtual straight line connecting respective ridge portions of the pair of first raised parts in a side view. ### Claim 7 (depends on 1) The cutting insert according to claim 1, wherein both W1 and W2 in each of the pair of first raised parts are smaller at a side of the second raised part than a side of the cutting edge, where W1 is a distance between the ridge portion of one of the first raised parts and the other ridge portion, and W2 is a distance between an intersection region of the one first raised part and a bottom part of the rake surface, and an intersection region of the other first raised part and the bottom part of the rake surface. ### Claim 8 (depends on 7) The cutting insert according to claim 7, wherein both the W1 and the W2 decrease as going from the cutting edge to the second raised part. ### Claim 9 (depends on 7) The cutting insert according to claim 7, wherein both the W1 and W2 are larger a side of the rising surface than the side of the second raised part. ### Claim 10 (depends on 7) The cutting insert according to claim 7, wherein both the W1 and the W2 increase as going from the second raised part to the rising surface. ### Claim 11 (depends on 1) The cutting insert according to claim 1, wherein the cutting edge comprises a first cutting edge and a second cutting edge intersecting each other, and at least one of the pair of first raised parts. comprises an approach portion, wherein the approach portion extends along the second cutting edge and approaches the second cutting edge as separating from the first cutting edge. ### Claim 12 (depends on 11) The cutting insert according to claim 11, wherein the approach portion comprises an end portion of the at least one of the plurality of the first raised parts, the end portion being further away from the first cutting edge. ### Claim 13 (depends on 11) The cutting insert according to claim 11, wherein the at least one first raised part comprises an inclined portion inclined and lying at a higher position as going from the second cutting edge to the ridge portion of the at least one of the plurality of the first raised parts. ### Claim 14 (depends on 13) The cutting insert according to claim 13, wherein the approach portion further comprises an end portion of the inclined portion, the end portion being further away from the first cutting edge. ### Claim 15 (depends on 13) The cutting insert according to claim 13, wherein the approach portion further comprises a lower end of the inclined portion, the lower end being closer to the second cutting edge. ### Claim 16 (depends on 11) The cutting insert according to claim 11, wherein the approach portion includes the ridge portion of the at least one of the plurality of the first raised parts. ### Claim 17 (depends on 11) The cutting insert according to claim 11, wherein the at least one of the plurality of the first raised parts is inclined and lying at a lower position as going to the end portion further away from the first cutting edge in a side view. ### Claim 18 (depends on 11) The cutting insert according to claim 11, wherein a pair of the second cutting edges are respectively disposed on both sides of the first cutting edge. ### Claim 19 (depends on 18) The cutting insert according to claim 18, wherein the pair of first raised parts are disposed symmetrical to each other along the pair of second cutting edges in a top view. ### Claim 20 (depends on 1) The cutting insert according to claim 1, wherein the upper surface further comprises a clamp surface positioned inward compared to the rising surface. ### Claim 21 (depends on 1) A cutting tool, comprising: a cutting insert according to claim 1; and a holder configured to attach the cutting insert to a front end thereof. ### Claim 22 (depends on 21) A method of manufacturing a machined product, comprising: rotating a workpiece; bringing the workpiece being rotated and the cutting edge of the cutting tool according to claim 21 into contact with each other; and separating the workpiece and the cutting tool from each other.