# US 2013/0156516 A1 · Indexable Cutting Insert and Cutting Tool Therefor > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2013/0156516 A1 - Document ID: US20130156516A1 - Status: Published application - Kind: A1 - Application number: 13/452,606 - Filed: 2012-04-20 - Published: 2013-06-20 - Earliest claimed: 2011-12-14 - Assignees: Iscar, Ltd. - Inventors: Gil Hecht - Web page: https://patentgrep.com/patent/US20130156516A1 ## CPC - B23B 27/1622: {characterised by having a special shape} - B23B 27/045: {with chip-breaking arrangements} - B23B 27/1614: {with plate-like cutting inserts of special shape clamped against the walls of the recess in the shank by a clamping member acting upon the wall of a hole in the insert (B23B27/1644 takes precedence)} - B23B 29/043: {with cutting-off, grooving or profile cutting tools, i.e. blade- or disc-like main cutting parts (B23B29/14 takes precedence)} - B23B 2200/0457: Pentagonal - B23B 2200/048: Star form - B23B 2200/121: with projections - B23B 2200/3627: Indexing - B23B 2200/369: Mounted tangentially, i.e. where the rake face is not the face with the largest area - B23B 2205/10: using two or more fixation screws - B23B 2260/104: Markings, i.e. symbols or other indicating marks - Y10T 29/49959: Nonresilient fastener - Y10T 407/2274: Apertured tool - Y10T 407/2282: including tool holding clamp and clamp actuator - Y10T 407/23: including tool having plural alternatively usable cutting edges - B23B: TURNING; BORING (arrangements for copying or controlling B23Q) - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract A cutting tool assembly includes a cutting tool and an indexable cutting insert having an insert index axis. The cutting insert includes parallel insert first and second sides connected by an insert peripheral surface that extends peripherally around the cutting insert. At least one clamping hole opens out to one or both of the insert first and second sides, and at least a portion of the clamping hole is in a clamping region of the cutting insert. The insert peripheral surface includes cutting edges that are spaced-apart and extend from the insert first side to the insert second side. Along a width direction, which is perpendicular to the insert first and second sides, each of the cutting edges is wider than the cutting insert, at least at the cutting region of the cutting insert. ## Claims ### Claim 1 An indexable cutting insert (14) having an insert index axis (CI) and comprising parallel insert first and second sides (22A, 22B) connected by an insert peripheral surface (24) which extends peripherally around the cutting insert (14), and at least one clamping hole opening (26) out to one or both of the insert first and second sides (22A, 22B); the insert peripheral surface (24) comprising cutting edges (18) which are spaced-apart and extend from the insert first side (22A) to the insert second side (22B); wherein each three consecutively positioned cutting edges (18A, 18B, 18C) constitute an associated cutting arrangement comprising a central cutting edge (18A) disposed between two peripheral cutting edges (18B, 18C), the central cutting edge (18A) being wider, along a width direction (DW) which is perpendicular to the insert first and second sides (22A, 22B), than any other portion of an associated insert cutting region (CU) defined from the central cutting edge (18A) to at least an imaginary straight line (IL1) connecting the two peripheral cutting edges (18B, 18C); and at least a clamping hole portion (48) of the at least one clamping hole (26) is located in an associated insert clamping region (CL) which is defined outside of the associated cutting region (CU). ### Claim 2 (depends on 1) The cutting insert (14) according to claim 1, wherein, in a plan view of at least one of the insert first and second sides (22A, 22B), the associated insert cutting region (CU) extends to an imaginary arc (IA) inscribed within the two peripheral cutting edges (18B, 18C) and opening in an outward direction (DO) from the insert index axis (CI) towards the central cutting edge (18A), the insert index axis (CI) being interposed between the arc (IA) and the central cutting edge (18A), thereby permitting the cutting insert to provide a depth of cut which extends to at least the imaginary arc (IA). ### Claim 3 (depends on 2) The cutting insert (14) according to claim 2, wherein the arc (IA) has a curvature corresponding to a curvature of an imaginary circle (IC) along which the cutting edges (18) lie. ### Claim 4 (depends on 1) The cutting insert (14) according to claim 1, wherein the at least one clamping hole (26) is a through-hole which opens out to both of the insert first and second sides (22A, 22B). ### Claim 5 (depends on 1) The cutting insert (14) according to claim 1, wherein each of the cutting edges (18) are wider along the width direction (DW) than any other portion of the cutting insert (14). ### Claim 6 (depends on 1) The cutting insert (14) according to claim 1, wherein the cutting insert (14) comprises exactly five cutting edges (18A, 18B, 18C, 18D, 18E). ### Claim 7 (depends on 1) The cutting insert (14) according to claim 1, wherein the cutting insert comprises a disc-shaped body portion (28) and cutting portions (18), each of the cutting portions (18) extending from a periphery of the body portion (28) and comprising one of the cutting edges (18). ### Claim 8 (depends on 1) The cutting insert (14) according to claim 1, wherein the insert peripheral surface (24) further comprises a plurality of peripheral seating surfaces (46), each of the peripheral seating surfaces (46) extending along a straight path from a first insert cutting portion (30) to a second insert cutting portion (30), the distance of each of the peripheral seating surfaces (46) to the insert index axis (CI) varying along different points of the path thereof. ### Claim 9 (depends on 1) The cutting insert (14) according to claim 1, further comprising at least one side seating surface (32) each of which being outwardly-spaced from at least one of the insert first and second sides (22A, 22B); wherein the at least one side seating surface (32) comprises a plurality of side seating surfaces (32A, 32B, 32C, 32D, 32E) on one of at least one of the insert first and second sides (22A, 22B); wherein the plurality of side seating surfaces (32) further comprises pairs of side seating surfaces (32A1, 32A2), wherein one side seating surface of each pair is located on opposing sides of the at least one of the insert first and second sides (22A, 22B). ### Claim 10 (depends on 1) The cutting insert (14) according to claim 1, wherein, in a plan view of one of the insert first and second sides (22A, 22B), the cutting insert (14) has rotational symmetry for a degree of rotation fulfilling the condition: (360°/[total number of the cutting edges]). ### Claim 11 (depends on 1) The cutting insert (14) according to claim 1, wherein the cutting insert is symmetrical about an imaginary insert plane (PI) which bisects the peripheral surface (24) and is parallel to the insert first and second sides (22A, 22B). ### Claim 12 A cutting tool (12) comprising a tool head (58), and a clamping mechanism (16) configured for securing a cutting insert (14) to an insert pocket (62) of the tool head (58); the insert pocket (62) comprising a pocket seating surface (72), at least one pocket wall (74) extending transversely from the pocket seating surface (72) and defining a pocket rear boundary (BR), and a pocket front edge (76) located on an opposing side of the pocket seating surface (72) from the pocket rear boundary (BR) and extending along a front boundary (BF) of the cutting tool (12); wherein, in a view perpendicular to the pocket seating surface (72), the tool head (58) and clamping mechanism (16) do not extend past an imaginary inscribed arc (IA) extending along the front boundary (BF). ### Claim 13 (depends on 12) The cutting tool (12) according to claim 12, wherein the clamping mechanism (16) comprises a clamp (84) comprising a clamp body portion (84B) configured to be secured to the tool head (58) at the front boundary (BF), and a clamp head portion (84D) configured to apply a force in a direction towards the pocket seating surface (72). ### Claim 14 (depends on 13) The cutting tool (12) according to claim 13, wherein the clamp head portion (84D) is further configured to apply a force in a direction towards the at least one pocket wall (74). ### Claim 15 (depends on 12) The cutting tool (12) according to claim 12, wherein, in an end view of the clamp (84), a front surface (84E) of the clamp (84) has a convex shape. ### Claim 16 (depends on 12) The cutting tool (12) according to claim 12, wherein, in an end view of the clamp (84), a rear surface (84F) of the clamp (84) has a concave shape. ### Claim 17 (depends on 12) The cutting tool (12) according to claim 12, wherein, in an end view of the clamp, the clamp has a crescent-shape. ### Claim 18 (depends on 12) The cutting tool (12) according to claim 12, wherein, the clamp (582) further comprises a guard portion (585) extending in a direction away from the clamp's head portion (584D). ### Claim 19 (depends on 1, 12) A cutting tool assembly (10) comprising, in combination, the cutting insert (14) according to claim 1, and the cutting tool (12) according to claim 12; wherein at least one side seating surface (32) of the cutting insert (14) and pocket seating surface (72) are configured for mutual engagement, and at least one insert peripheral seating surface (46) and at least one pocket wall (74) are configured for mutual engagement, for providing stabilized mounting of the cutting insert (14) to the cutting tool (12). ### Claim 20 A method of clamping a cutting insert (14) to a cutting tool, the cutting insert (14) comprising parallel insert first and second sides (22A, 22B) connected by an insert end (24) which extends peripherally around the cutting insert (14), and at least one clamping hole (26) opening out to both of the insert first and second sides (22A, 22B); the cutting tool (12) comprising a tool head (58), and a clamping mechanism (16) configured for securing a cutting insert (14) to an insert pocket (62) of the tool head (58); the insert pocket (62) comprising a pocket seating surface (72), at least one pocket wall (74) extending transversely from the pocket seating surface (72) and defining a pocket rear boundary (BR), and a pocket front edge (76) located on an opposing side of the pocket seating surface (72) from the pocket rear boundary (BR) and extending along a front boundary (BF) of the cutting tool (12); wherein, in a view perpendicular to the pocket seating surface (72), the tool head (58) and clamping mechanism (16) do not extend past an imaginary inscribed arc (IA) extending along the front boundary (BF); the method comprising: a. mounting the cutting insert (14) to the clamp (84) by extending a clamp body portion (84B) of the clamp (84) completely through a clamping hole portion (48) of the at least one clamping hole (26) while leaving a remainder of the at least one clamping hole (26) unoccupied; and b. fastening at least one clamp (84) to the cutting tool head (58) to thereby bias the clamp head portion (84B) of the at least one clamp (84) against the cutting insert (14) and secure the cutting insert (14) to the insert pocket (62). ### Claim 21 (depends on 20) The method according to claim 20, wherein the at least one clamping hole (326) is a plurality of spaced-apart clamping holes (326) and the at least one clamp is a plurality of clamps (384), wherein the step of fastening comprises fastening the plurality of clamps (384). ### Claim 22 (depends on 21) The method according to claim 21, wherein the step of fastening comprises fastening exactly three clamps (384).