One-dimensional longitudinal-torsional vibration converter with multiple diagonally slitted parts

For increasing the available vibration velocity of the one-dimensional long itudinal-torsional vibration converter, a new type of complex vibration con verter with multiple slitted parts installed in the positions avoiding long itudinal nodal positions along the converter for decreasing the maximum vib ration stress level at the vibration nodal part was studied. The free end o f the converter vibrates in an elliptical or circular locus. Complex vibrat ion systems with elliptical to circular or rectangular to square loci can b e applied effectively for various high-power applications, including ultras onic welding of metal or plastics, ultrasonic wire bonding of IC, LSI and e lectronic devices, and also ultrasonic motors. The converter with multiple slitted parts was improved in the vibration stress level and the quality fa ctor compared with the converter with single slitted part. (C) 2000 Elsevie r Science B.V. All rights reserved.