A cutting insert in a non-limiting aspect of the present disclosure may include an upper surface, a lower surface, a lateral surface and a cutting edge. The upper surface may include a first corner and a first side. The upper surface may further include a first protrusion and a second protrusion. The first protrusion may be extended toward the first corner. The second protrusion may be located between the first corner and the first protrusion. The first protrusion may include an inclined surface. The inclined surface may be located along the first side. The inclined surface may include a first surface and a second surface. The second surface may be located further away from the first corner than the first surface. The first surface and the second surface may be individually inclined upward as going away from the first side, and having a concave shape as a whole.

An insert of the present disclosure includes a boron nitride sintered body including a first surface. In a transmission X-ray diffraction of a cross section of the boron nitride sintered body vertical to the first surface, X-ray intensity at a top of a 111 diffraction peak of cubic boron nitride in a direction vertical to the first surface is IcBN(111)v. X-ray intensity at a top of a 002 diffraction peak of compressed boron nitride is IhBN(002)v. X-ray intensity at a top of a 111 diffraction peak of the cubic boron nitride in a direction parallel to the first surface is IcBN(111)h. X-ray intensity at a top of a 002 diffraction peak of the compressed boron nitride is IhBN(002)h. A compressed boron nitride content value obtained from these X-ray intensities is larger than 0.005. A cubic orientation value is larger than 0.5, and a compressed boron nitride orientation value is larger than the cubic orientation value.

A tool system for machining includes a tool body that has a first end for connecting to a machine tool and a second end having an end face on which a seat for an interchangeable cutting insert is formed. The cutting insert has an underside formed as an abutment surface, a top side formed as a rake face, and an encircling side face formed as a flank, and a cutting edge is formed at a transition from the top side to the encircling side face. The cutting insert is arranged on the seat such that the top side extends perpendicularly to the longitudinal axis of the tool body and the cutting edge protrudes beyond the outer circumference of the end face of the tool body in a radial direction with respect to the longitudinal axis with two usable cutting corners and cutting-corner portions adjoining the latter on both sides.

A cutting insert has a top surface, a seating surface, and an outer peripheral surface. The cutting edge includes a corner cutting edge portion, a first cutting edge portion, and a second cutting edge portion. The top surface includes a first rake face, a second rake face, a third rake face, a front side surface, an upper surface, a first side surface, and a second side surface. A ridgeline between the first side surface and the second side surface is continuous to the upper surface. When seen in a direction perpendicular to the seating surface, a width of a boundary between the front side surface and the third rake face is larger than a width of a boundary between the front side surface and the upper surface.

The invention relates to a method for producing an indexable insert comprising the following steps: a) providing a starting material for use in an additive manufacturing method in several layers of material; and b) bonding each layer of the starting material in the form of an indexable insert.

To provide a cutting insert that is properly manufactured with ease of use. A cutting insert has a first end face, a second end face on the opposite side from the first end face, and a peripheral side surface that is parallel to a central axis connecting the center of the first end face and the center of the second end face and connects the first end face and the second end face. A first major cutting edge is formed on the outer edge of the first end face. A first flank facing the first major cutting edge is formed between the first major cutting edge and the peripheral side surface and has a negative clearance angle α with respect to the peripheral side surface. The peripheral side surface includes a first side surface facing the first flank. Between the first flank and the first side surface, a recess line is formed to extend along a virtual edge line where a virtual plane extending from the first flank and a virtual plane extending from the first side surface cross each other, and the recess line is formed with a notch on the virtual edge line.

Cutting tool systems including a cutting tool and cutting inserts are disclosed. The cutting inserts have indexable cutting edges and seating face features which enable uniform facets along a portion of each cutting edge of the indexable insert. The first and second seating face surfaces of the cutting insert each comprise control cavities that adjoin the cutting edge facet surfaces. Each control cavity allows its corresponding cutting edge to have a facet width that is defined by the cavity to provide uniform surfaces. The control cavities reduce and limit the amount of the first and second seating face surfaces that need to be ground. Methods of making such cutting inserts are disclosed.

A cutting insert which can be used with a total of 4 cutting edges being switched over, and of which thickness can still be reduced, and a cutting tool equipped with this cutting insert are provided. The cutting insert includes: a pair of first constraining surfaces which face each other in a rotating direction of a body; a pair of second constraining surfaces which face each other in a direction toward a rotational center axis of the body; cutting edges disposed respectively along a pair of sides located at positions facing each other, of sides framing the first constraining surface; and flanks which are disposed at positions adjacent to the cutting edges respectively in the rotating direction. In this cutting insert, an angle formed by the first constraining surface and the flank, which are adjacent to each other across the cutting edge, is larger than 90°.

A cutting part of a cutting insert may include a first surface including a corner, a first side, a first region, a second region and a third region. The first region may be located along the corner and the first side. The second region may be located at a more inner part than the first region. The third region may be located at a more inner part than the second region. A boundary between the corner and the first side may be a first point. A boundary between the first region and the second region may be a second point in a cross section that passes through the first point and is orthogonal to the first side. An imaginary straight line passing through the first point and the second point may be a first imaginary straight line. The first imaginary straight line may intersect with the third region.

A double-sided cutting insert with orientation-assisting geometry includes identical and opposite first and second main surfaces and a peripheral surface which extends therebetween. The insert further includes a median plane located midway between the first and second main surfaces and opposite first and second clamping recesses opening out respectively to the first and second main surfaces. Projections onto the median plane of at least portions of the first and second clamping recesses are rotationally offset from one another about a central axis.