Dynamic Behavior Research of Boring Cutter with High Damping Alloy Sleeve

Abstract

AbstractThis paper proposed a new kind of boring cutter with high damping alloy sleeve. Based on this new boring cutter model, and modal analysis is done to study its vibration shape and natural frequency. Boring cutter’s stiffness and damping ratio are deducted analytically and verified by FEA method. The optimization analysis, taken high damping alloy sleeve wall thickness as parameter, is completed. The optimization goal is the maximum value of harmonic response analysis, and the optimization criterion is to minimize the maximum value of harmonic response analysis, the optimization analysis result shows that the 2.35 mm wall thickness high damping alloy is the best design parameter. Finally, the modal experiments of this vibration absorption boring cutter are conducted. The experiments shows that, if the clamping position of the same cutter is fixed and the tightening torque is changed, the natural frequency of the cutter does not change significantly, and changing the position of excitation point has little influence on the natural frequency of the cutter under the same clamping position and the same tightening torque. The related research results established a new way to design boring cutter with high damping alloy sleeve, which could decrease the cutting force, lower the noise and improve the work piece surface smoothness dramatically.KeywordsVibrationHigh damping alloyBoring cutterModal analysisOptimization design