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机床的镗刀杆因其受力结构为悬臂梁,极易产生振动,为了研究镗杆的减振问题,根据自激振动耦合型颤振原理以及受迫振动动力消振原理,将普通结构镗杆改进设计为内置减振芯的由两种材料组成的镗杆结构,同时根据将镗杆的小刚度主轴进行合理布置可以减振的原理,对该组合材料结构的镗杆进行了削扁,以期达到最优的减振效果。借助有限元分析软件建立了圆形结构、削扁结构、削扁组合材料结构三种不同类型的镗杆模型,在相同的工况下,对三种镗杆分别做静力学分析和动力学分析,对比仿真实验结果证明了组合材料结构的削扁镗杆具有更佳的减振效果。
In order to study the damping problem of boring bar, according to the self-excited vibration-coupled flutter principle and the principle of forced vibration and dynamic vibration attenuation, the boring boring bar of machine tool is easy to produce vibration because of its force structure. The rod is designed to be a boring bar structure with two kinds of materials with built-in damping core. At the same time, the boring bar of the composite material structure is flattened according to the principle that the small rigidity main shaft of the boring bar can be arranged rationally, In order to achieve the best damping effect. With the aid of finite element analysis software, three different types of boring bar models, round structure, flattened structure and flattened composite material structure, were established. Under the same conditions, the static and dynamic analyzes of the three boring bars were done respectively Compared with the simulation results, it is proved that the shaving boring bar with composite material has better vibration damping effect.