BORING BAR AND A NON-ROTATING BORING TOOL AND A BORING ARRANGEMENT COMPRISING SUCH A BORING BAR

摘要

A boring bar (2) for a non-rotating boring tool comprising:- an elongated body (6) configured for attachment to a support structure of a metal cutting machine and arranged to carry a tool part (4) provided with a cutting element (5); and- at least two electrically controlled vibration actuators (16) for active vibration damping of the boring bar (2), each actuator comprising a moveably arranged damping mass (16a) and being configured to generate vibratory forces in parallel with a working axis (17) of the actuator that is perpendicular to a centre axis (15) of the damping mass, wherein each actuator is a single-axis actuator having one single working axis, and wherein these actuators are arranged with their working axes angularly offset from each other.;Said actuators (16) are arranged in a longitudinal series in the elongated body (6) with the centre axis (15) of the damping mass (16a) of each actuator coinciding with a longitudinal axis (7) of the elongated body.