The application discloses a
tool wear monitoring device with a self-cleaning function and belongs to the technical field of
machine tool tool state monitoring. The device comprises a
chassis, an X-direction displacement
assembly, a Y-direction displacement
assembly, a Z-direction displacement
assembly, an angle adjusting assembly, a clamping piece, a self-cleaning protection assembly, a cleaning medium supply box and a positioning assembly. The clamping piece is installed on the outer wall of a tool shank through a split half structure, a sensor module is embedded in the clamping piece, and a sensing probe penetrates out to the outer surface of the clamping piece. The self-cleaning protection assembly comprises a protective cover body, a turnover cover plate, a micro
drive motor and a wiping piece, and the wiping piece wipes the surface of the sensing probe during the opening and closing of the turnover cover plate. The cleaning medium supply box sprays medium to the
machining area through a conveying
pipe, thereby reducing the splashing of pollutants in the direction of the sensing probe from the source, and the two components cooperatively form a cleaning chain of "source control-end removal", thereby realizing the long-term stability and accuracy of
monitoring data.