Cutting tool and clamping mechanism for holding a cutting insert thereto

摘要

A cutting tool (10) includes a cutting portion (14) and a clamping mechanism (16) configured to be brought between an unclamped position in which a cutting insert (12) is removable from the cutting portion (14), and a clamped position in which the cutting insert (12) is clamped to the cutting portion (14). The clamping mechanism (16) includes a clamp (20) and a cam shaft (18). The clamp (20) is formed with a growth pattern region (20C6) having a varying diameter. The cam is formed with a growth pattern region (18C1) having a varying diameter. The growth pattern regions (20C6, 18C4) are configured for engaging each other to transform rotary motion of the cam shaft (18) into linear motion of the clamp (20) to thereby move the clamping mechanism (16) into the clamped position.

主权项

1. A cutting insert (12) comprising:
opposing upper and lower surfaces (12D, 12E), opposing longitudinal side surfaces (12M) and opposing lateral side surfaces (12N) extending transversely to and connecting the opposing longitudinal side surfaces (12M); a cutting insert through bore (28) passing between the opposing upper and lower surfaces (12D, 12E), the cutting insert through bore (28) having an elongated shape in a plan view of the upper surface (12D); opposing first and second longitudinal walls (12F, 12G) extending between the upper and lower surfaces (12D, 12E) and defined between a portion of each of the longitudinal side surfaces (12M) and the through bore (28); and opposing first and second transverse walls (12H, 12I) extending between the opposing upper and lower surfaces (12D, 12E), and extending transverse, and connected, to the opposing first and second longitudinal walls (12F, 12G); wherein: the cutting insert through bore (28) being defined between inner surfaces (12F1, 12G1, 12H2, 12I2) of the opposing first and second longitudinal walls (12F, 12G) and the first and second transverse walls (12H, 12I); a longitudinal cutting insert axis (AH) extends between the inner surfaces (12F112G1) of the opposing first and second longitudinal walls; a transverse cutting insert axis (AF) extends between the inner surfaces (12H2, 12I2) of the opposing first and second transverse walls, the transverse cutting insert axis (AF) being perpendicular to the longitudinal cutting insert axis (AH):, the cutting insert is two-way indexable and has 180° rotational symmetry about a cutting insert axis (AC) perpendicular to both the longitudinal cutting insert axis (AH) and the transverse cutting insert axis (AF); each of the inner surfaces (12F1, 12G1) of the first and second longitudinal walls (12F, 12G) is formed with a protruding clamping lip (12F2, 12G2) which projects into the through bore (28); the clamping lips (12F2, 12G2) are located on either side of said longitudinal cutting insert axis (AH), in a top view of the cutting insert; and each inner surface (12H2, 12I2) of the first and second transverse walls (12H, 12I) are devoid of a protruding clamping lip having a surface facing the upper surface (12D).