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US 9,174,279 B2Granted
Indexable cutting insert and cutting tool therefor
AssigneeIscar, Ltd.
InventorGil Hecht
Life of this patent
Estimating the term…
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.
Claims31
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 (26) opening 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), a pair of sidewalls (38) tapering inwardly on either side of an associated cutting edge;
- 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);
- 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);
- and
- the at least one clamping hole (26) has portions located on each side of the imaginary line (IL1).
3 more elements
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 clamping mechanism (16) comprises
- a clamp (84) comprising
- a clamp body portion (84B), and
- a clamp head portion (84D);
- 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's pocket rear boundary (BR) and extending along a front boundary (BF) of the cutting tool (12);
- wherein the clamp body portion (84B) is configured to be secured to the tool head (58) at the front boundary (BF), and the clamp head portion (84D) is configured to apply a force in a direction towards the pocket seating surface (72) and the at least one pocket wall;
- 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).
9 more elements
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 a clamping hole which is a through-hole (26) opening out to both of the insert first and second sides (22A, 22B);
- the insert peripheral surface (24) comprising exactly five cutting edges (18A, 18B, 18C, 18D, 18E) 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 arc (IA) having a circular curvature with the same radius as an imaginary circle (IC) along which the cutting edges (18) lie;
- the arc (IA) extending to reinforced portions (33) or points directly adjacent to the peripheral cutting edges (18B, 18C);
- and
- at least a clamping hole portion (48) of the clamping hole (26) is located in an associated insert clamping region (CL) which is defined outside of the associated cutting region (CU);
- the clamping hole portion (48) being defined between a clamping hole edge (50) and the arc (IA) and having a crescent shaped clamping area (52) of at least 2% of an area of an imaginary circumscribed circle (IC) along which the cutting edges (18) lie.
3 more elements
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 (26) opening 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);
- 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);
- and
- the at least one clamping hole (26) has portions located on each side of the imaginary line (IL1), 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]).
5 more elements
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 (26) opening 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);
- 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);
- and
- the at least one clamping hole (26) has portions located on each side of the imaginary line (IL1), 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).
4 more elements
Dependencies are inferred from the claim text.