Cutting insert with undulating concave chip forming groove
AssigneeIscar, Ltd.
InventorsGideon Boianjiu, Jacob Harpaz
Life of this patent
Estimating the term…
Abstract
A cutting insert for use in a cutting tool has upper, lower and side surfaces and at least one cutting edge formed at an intersection of the upper surface with the side surface thereof. A rake face of the insert is formed with an undulated chip forming groove extending along the cutting edge and comprising a succession of alternating depressed and raised portions. Each raised portion of the chip forming groove is formed with a truncated top portion of a width which is substantially less than a distance between two adjacent truncated top portions. The depressed and raised portions preferably extend, in the direction perpendicular to the cutting edge, along the entire width of the chip forming groove.
Claims17
A cutting insert for use in a cutting tool, said insert having upper and lower and side surfaces and at least one cutting edge formed at an intersection of the upper surface and one side surface and extending between two adjacent main cutting corners of the insert, regions of the upper and side surfaces adjacent the cutting edge constituting respectively rake and relief flank faces;
- said rake face being formed with an undulated chip forming groove extending along said at least one cutting edge and comprising alternating depressed and raised portions smoothly merging with one another;
- said depressed and raised portions being generally concave in their cross-section taken in the direction perpendicular to said cutting edge and each having a sloping surface extending downwardly away from the cutting edge, a chip deflecting surface rising upwardly away from the cutting edge and an intermediate portion therebetween;
- each raised portion being formed with a truncated top portion of a width which is substantially less than a distance between two adjacent truncated portions.
A cutting tool having a cutting insert mounted therein, said insert having upper, lower and side surfaces and at least one cutting edge formed at an intersection of the upper surface and the side surface thereof, regions of the upper and side surfaces adjacent the cutting edge constituting respectively rake and relief flank faces, the rake face being formed with an undulated chip forming groove extending along said at least one cutting edge and comprising a succession of alternating depressed and raised portions smoothly merging with one another, wherein
- said depressed and raised portions having a substantially concave shape in cross-section perpendicular to the cutting edge and each raised portion is formed with a substantially truncated top portion of a width which is substantially less than a distance between two adjacent truncated top portions,
- said insert is double-sided and indexable and has a polygonal shape, and is formed with a plurality of cutting edges at intersections of the side surface of the insert with its upper and lower surfaces, regions of said upper and lower surfaces and of said side surface adjacent each cutting edge of the insert constituting respectively upper and lower rake and relief flank surfaces of the insert,
- said upper and lower relief flank faces are inclined to the associated rake faces at an acute angle, and
- said insert is adapted to be mounted in said tool at a negative axial rake angle which is in the range of 3.5.degree. to 6.5.degree..
Dependencies are inferred from the claim text.