Study on Machining Vibration Suppression with Multiple Tuned Mass Dampers: Vibration Control for Long Fin Machining
Ippei Kono*1,†, Takayuki Miyamoto*2, Koji Utsumi*1, Kenji Nishikawa*1, Hideaki Onozuka*3, Junichi Hirai*4, and Naohiko Sugita*5
292 Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa, Japan
*2Mitsubishi Hitachi Power Systems, Ltd., Ibaraki, Japan
*3Hitachi Automotive Systems, Ltd., Kanagawa, Japan
*4Hitachi, Ltd., Ibaraki, Japan
*5The University of Tokyo, Tokyo, Japan
This study aims to suppress vibration during the machining of long and thin fin parts. Typically, fin parts have low stiffness because fixing the fin is impeded by a end-mill, machine tool or other fins. In this study, multiple tuned mass dampers (TMDs) with the same characteristics were applied to the machining of a fin part measuring 18 mm × 180 mm × 2600 mm. The characteristics of the TMDs were optimized by calculation using a lumped-mass-points system model of the fin part. Then, an impact hammer test and a machining test were conducted on the actual fin part. The dynamic stiffness of the fin part was improved by up to 14 times by using five TMDs, and the amplitude of vibration during machining was decreased by more than 90%.
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