摘要
立柱作为数控加工中心的重要结构部件之一,其动态特性的好坏对机床的切削效率、加工精度和抗振性等性能的影响较为突出,通过实验的方法获取立柱结构的准确模态可为整机性能的优化提供重要依据。采用锤击法对两种不同结构的立柱进行了模态实验,得到了相应的固有频率和振型,并验证了实验结果的正确性。分析和对比结果显示,在实现质量轻化的同时,改进后的立柱的动态性能仍明显优于改进前的立柱,为立柱的结构的选取和进一步优化提供了现实依据。
As one of the important components of the CNC,the column＇s dynamic characteristics have a big influence on the machine tools ＇cutting efficiency,precision and vibration resistance.Obtaining accurate modal of the column by modal test can provide reference for machine tool＇s optimization.Modal testing is operated on two columns by hammering method to get the natural frequency and vibration mode.The results prove that the improved column＇s dynamic characteristics is better than the original one while reducing the weight.
出处
《机械设计与制造》
北大核心
2014年第3期117-119,共3页
Machinery Design & Manufacture
基金
国家科技重大专项(2012ZX04010-011)
关键词
立柱
模态实验
动态性能
CNC
Column
Modal Testing
Dynamic Characteristics
CNC
