Composite ultrasonic vibration trepanning processing device for engineering driller

The utility model relates to the field of ultrasonic vibration machining, and provides a composite ultrasonic vibration trepanning machining device for an engineering driller. The device is composed of an engineering driller, an ultrasonic vibration part and a thin-wall engineering drill bit. The engineering driller provides drilling power, meanwhile, the ultrasonic vibration part is powered by the conductive slip ring to excite the vibrator to generate longitudinal vibration, and then the longitudinal vibration is converted into longitudinal-torsional composite vibration through an inclined groove in the cylinder wall of the drill bit. Cooling water flows into a drill bit cavity from a water outlet of a drilling machine spindle along a through hole in the center of the whole device, and the purposes of cooling and flushing cuttings are achieved. The ultrasonic vibration drilling device is simple in structure, easy to assemble and disassemble, capable of effectively improving machiningquality and efficiency a