The invention discloses a three-dimensional elliptical
ultrasonic vibration cutting device adopting a longitudinal bending composite mode. The three-dimensional elliptical
ultrasonic vibration cuttingdevice is composed of a pre-tightening bolt, a rear cover plate, a first excitation source, a second excitation source, a middle cover plate, a third excitation source and a
flange front cover plate.The three-way excitation sources are driven by input signals with the same frequency, wherein the phase angles of the input
signal are different in pairs. By adjusting the
voltage and
phase difference of driving signals of the three-way excitation sources, a tool
nose point of a tool mounted at the output end of the three-dimensional elliptical
ultrasonic vibration cutting device obtains spatialelliptic vibration trajectories with different vibration amplitudes and phase differences. According to the three-dimensional elliptical ultrasonic vibration
cutting device, the
assembly link is less,and mounting and dismounting of a blade are convenient; a
flange structure is adopted, and the
system stiffness is good; and the effect on the aspect of cutting
machining of parts with hard machiningmaterials, weak stiffness and free curved surfaces is remarkable,
cutting force and the cutting temperature can be significantly decreased, tool abrasion and
machining deformation of the workpiece materials can be significantly reduced, the surface quality and form and position accuracy of the parts are improved, the subsequent
machining process is reduced, and then the machining efficiency and economical efficiency are improved.