RU2022119262A - GROOVING CUTTER BODY WITH INTERNALLY OFFSET GROOVE TO RECEPTION CUTTING INSERT - Google Patents

Claims (16)

1. The cutting insert (24), elongated in the longitudinal direction, defining the longitudinal axis (A) of the cutting insert, containing: opposite upper and lower surfaces (84, 86) of the cutting insert and a peripheral surface (88) of the cutting insert passing between them, and the peripheral surface (88) of the cutting insert contains two opposite end surfaces (90) of the cutting insert connecting the upper and lower surfaces ( 84, 86) of the cutting insert and two opposite side surfaces (92) of the cutting insert, also connecting the upper and lower surfaces (84, 86) of the cutting insert; the longitudinal plane (P1) of the cutting insert, containing the longitudinal axis (A) of the cutting insert, passing between the side surfaces (92) of the cutting insert and intersecting the upper and lower surfaces (84, 86) of the cutting insert, and also crossing the opposite end surfaces (90) of the cutting inserts; and two cutting parts (94a, 94b) located at opposite ends of the cutting insert (24), each of which contains a cutting edge (96) formed at the intersection of the upper surface (84) of the cutting insert and one of the two end surfaces (90) of the cutting insert ; and: each cutting part (94a, 94b) of the cutting insert comprises two lateral extensions (98a, 98b) of the cutting insert, which protrude from opposite sides of the cutting insert (24) laterally from the longitudinal plane (P1) of the cutting insert, and along which the cutting edge passes (96); the two side extensions (98a, 98b) of the cutting insert comprise a wide and narrow side extensions (98a, 98b) of the cutting insert, the wide side extension (98a) of the cutting insert being longer than the narrow side extension (98b) of the cutting insert in the direction perpendicular to longitudinal plane (P1) of the cutting insert; and the wide side extensions (98a) of the cutting insert are on opposite sides of the longitudinal plane (P1) of the cutting insert. 2. The cutting insert (24) according to claim 1, wherein in the side view of the cutting insert (24), the key surface (102) of the cutting insert is concave. 3. The cutting insert (24) according to claim 1, in which the key surface (102) of the cutting insert is located completely below the median plane (M) of the cutting insert, which runs midway between the upper and lower surfaces (84, 86) of the cutting insert and contains a longitudinal axis (A) of the cutting insert. 4. The cutting insert (24) according to claim 3, in which: each cutting part (94a, 94b) of the cutting insert comprises two lateral extensions (98a, 98b) of the cutting insert, which protrude from opposite sides of the cutting insert (24) laterally from the longitudinal plane (P1) of the cutting insert, and along which the cutting edge passes (96); the two side extensions (98a, 98b) of the cutting insert comprise a wide and narrow side extensions (98a, 98b) of the cutting insert, the wide side extension (98a) of the cutting insert being longer than the narrow side extension (98b) of the cutting insert in the direction perpendicular to longitudinal plane (P1) of the cutting insert; and wide side extensions (98a) of the cutting insert are located on opposite sides of the longitudinal plane (P1) of the cutting insert. 5. The cutting insert (24) according to claim 4, in which: two cutting parts (94a, 94b) contain an active cutting part (94a) and an inactive cutting part (94b), and the cutting edge (96) of the active cutting part (94a) is located outside the radial continuation of the cutting part (26); and the wide side extension (98a) of the active cutting portion (94a) is axially the most forward of the two side extensions (98a, 98b) of the cutting insert relative to the axial direction.