| 主权项 |
1. A cutting tool, comprising:
at least one cutting insert; a tool body including a pocket portion to which the cutting insert is mounted; a fixing part to fix the cutting insert to the pocket portion of the tool body; and a position-adjusting device that finely adjusts a position of the cutting insert fixed to the pocket portion of the tool body, along an adjustment direction (X, Z); the position-adjusting device includes a head portion having a central axis (C1) and a peripheral side surface, the head portion located at an outermost axial end of the position- adjusting device, a threaded portion having a diameter D, and a connecting portion connecting the head portion to the threaded portion, the connecting portion having a length A and a diameter d, the length A being longer than the diameter d; the pocket portion includes a bottom surface with a screw hole, having a central axis (C3), formed thereon into which the threaded portion is fastened and a side wall including a close contact surface that closely contacts the head portion of the position-adjusting device; the close contact surface in cross section being either perpendicular to, or forming an acute external angle with, the adjustment direction (X, Z), and the distance between the close contact surface and a central axis of the screw hole is L, L being less than a maximum radius R of the head portion; and the position-adjusting device is configured such that the head portion closely contacts and resiliently presses the close contact surface of the pocket portion such that the head portion interferes with an upper end of the close contact surface when the threaded portion is fastened into the screw hole while the portion connecting the head portion to the threaded portion is resiliently deformed so that the head portion is offset from the threaded portion in a direction opposite to the close contact surface when the threaded portion is fastened into the screw hole, and while the head portion closely contacts and resiliently presses the close contact surface of the pocket portion the offset head portion contacts an outside surface of the cutting insert fixed to the pocket portion that faces the head portion, with the outside surface of the cutting insert fixed to the pocket portion that faces the head portion being only in contact with the head portion, to maintain an adjusted cutting insert position when a cutting insert is replaced; wherein the position-adjusting device is configured such that central axes of the head portion and the threaded portion are disposed in the same line when the position-adjusting device is not fastened into the screw hole of the pocket portion; wherein the position-adjusting device is configured such that the head portion is pressed by the close contact surface of the pocket portion to thereby displace the head portion in a direction opposite to the close contact surface relative to the central axis of the threaded portion when the position-adjusting device is fastened into the screw hole of the pocket portion; and wherein a side wall of the screw hole and the close contact surface include a portion disposed in the same straight line parallel to the central axis of the position-adjusting device, and wherein the head portion of the position-adjusting device includes a portion having a cross-section larger than that of the threaded portion. |
