内置被动阻尼器减振铣刀的实验测试

提出一种长径比接近8的内置被动阻尼器减振铣刀结构。开展阻尼器模态测试,确定最优结构设计方案。对内置被动阻尼器减振铣刀进行周向模态测试,研究减振铣刀在不同方位的动力学特性。选取铝合金和钛合金工件材料,开展多组切削参数组合下的切削实验测试。在铝合金切削时,减振铣刀的加工噪声、切削力和表面粗糙度比无阻尼铣刀平均下降了52.1%,49.5%和73.4%;在钛合金全槽铣削时,能够在无阻尼铣刀出现明显颤振的切削条件下实现平稳切削。

Experimental Tests of Damped Milling Cutter Based on Embedded Passive Damper

A design of damped milling cutter embedded with passive damper is proposed, and an optimal structural design is achieved after performing modal tests on the damper. The dynamic characteristics of the damped milling cutter in different directions are studied. Moreover, the cutting experiments of aluminum alloy and titanium alloy with different cutting parameters are accomplished. Compared with the non-damped milling cutter, the machining noise, cutting force and surface roughness of damped milling cutter are reduced by 52.1%, 49.5% and 73.4%, respectively, when machining aluminum. The damped milling cutter can machine the titanium in a stable condition while non-damped cutter has an obvious chatter vibration with the same cutting parameters.