| 主权项 |
1. A cutting tool assembly, comprising:
a cutter body comprising:
an insert pocket having a base wall, two or more side walls and a corner portion between the side walls;a clamp pin hole obliquely extending from the base wall; anda threaded hole inclined with respect to the clamp pin hole and joined to a lower portion of the clamp pin hole at an inner end thereof; a clamp pin comprising:
a pin body inserted to the clamp pin hole and having a body central axis (C1) extending in a longitudinal direction;a head extending along a head central axis (C2) forming an angle (α) with the body central axis (C1), the head having a pressing surface directed to the corner portion of the insert pocket; anda notch formed at a lower portion of the pin body; a cutting insert comprising:
a top surface;a bottom surface;side surfaces located between the top surface and the bottom surface and contacting the side walls of the insert pocket; anda bore having an inner peripheral surface which the pressing surface of the head contacts; and a set screw fastened to the threaded hole, the set screw engaging the notch of the clamp pin and pressing the head of the clamp pin toward the base wall of the insert pocket, wherein: a first contact portion (P3) where the side surface of the cutting insert contacts the side wall of the insert pocket and a second contact portion (P4) where the pressing surface of the head contacts the inner peripheral surface of the bore are located such that a moment acts on the cutting insert toward the base wall of the insert pocket around the first contact portion (P3). |
