基于元结构的YKW51250插齿机床身动态特性分析及试验验证

发布时间：2018-10-05 10:55

【摘要】：YKW51250插齿机床身是关键的承载大件,其动态性能的好坏将直接影响整机的加工精度和稳定性。为实现床身的快速动态优化设计,提出了一种新的机床动态特性分析方法,这是一种基于元结构理论的分析方法,将元结构理论合理应用于机床动力学领域。首先,使用Python语言建立元结构的参数化模型,分析机床床身元结构各主要参数对其动态特性的影响。在此基础上,对床身元结构参数进行多目标优化,得到了元结构的固有频率和质量,以及元结构参数间映射关系和多目标优化的Pareto解集。再次,通过LMS试验验证了优化结果。最后,通过YKW51250插齿机床身算例证明了该方法是可行的,床身低阶固有频率得到了较大幅度的提高,改善了床身的动态特性,实现了根据机床元结构变量制造满足相应要求的机床的目标,具有较高的精度和较强的工程实用性。
[Abstract]:The bed of YKW51250 gear shaper is a key bearing part, and its dynamic performance will directly affect the machining accuracy and stability of the whole machine. In order to realize the rapid dynamic optimization design of the bed, a new analysis method of machine tool dynamic characteristics is proposed, which is based on the element structure theory, and the element structure theory is reasonably applied in the field of machine tool dynamics. Firstly, the parameterized model of the meta-structure is established by using Python language, and the influence of the main parameters of the machine bed structure on its dynamic characteristics is analyzed. On this basis, multi-objective optimization of the structure parameters of the bed is carried out, and the natural frequency and mass of the element structure, the mapping relationship between the parameters of the element structure and the Pareto solution set of the multi-objective optimization are obtained. Thirdly, the optimization results are verified by LMS test. Finally, an example of YKW51250 gear shaper is given to prove that the method is feasible, and the low order natural frequency of the bed has been greatly improved, and the dynamic characteristics of the bed have been improved. The goal of making machine tools that meet the corresponding requirements according to the structural variables of machine tools is realized, which has higher precision and stronger engineering practicability.
【作者单位】：天津理工大学机械工程学院天津市先进机电系统设计与智能控制重点实验室;
【基金】：天津市自然科学基金资助项目(13JCYBJC17800);天津市自然科学基金重点基金资助项目(15JCZDJC32800)
【分类号】：TG613

【参考文献】