Design of Longitudinal-Bending Elliptical Vibration Ultrasonic Transducer with Bending Horn

The thin and straight horn of the ultrasonic transducer is located in the center of the thick transducer, so that the tool tip of the ultrasonic vibration turning tool holder cannot be located on the outermost side of the entire tool holder, which leads to the structural interference between the tool holder and the part during turning. In order to solve this problem, this paper proposes a longitudinal-bending elliptical vibration ultrasonic transducer with bending horn for ultrasonic vibration-assisted cutting (UVAC). A-type transducer can be used for UVAC of external surface, and B-type transducer can be used for UVAC of internal cavity. The maximum peak-peak amplitudes of longitudinal vibration and bending vibration for A-type transducer are 14μm and 16μm, respectively. The maximum peak-peak amplitudes of longitudinal vibration and bending vibration for B-type transducer are 17μm and 21μm, respectively. Such a large amplitude can fully meet the needs of UVAC. When using ultrasonic transducer with bending horn for partial separation continuous high-speed elliptic ultrasonic vibration cutting (HEUVC), compared with conventional cutting (CC), HEUVC can improve the tool life by 65.74% for A-type transducer, HEUVC can improve the tool life by 44.62% for B-type transducer.