玄武岩纤维树脂混凝土填充结构龙门加工中心横梁优化设计

Optimization Design of Gantry Machine Center Crossbeam Filled with Basalt Fiber Polymer Concrete

为探索提高机床加工精度、稳定性和可靠性的新途径,提出了玄武岩纤维树脂混凝土(Basalt fiber reinforced concrete,BFPC)填充结构龙门加工中心机床横梁新构型.首先,以某龙门机床横梁为原型初步设计了BFPC填充结构横梁.其次,利用有限元法对原型横梁的静、动态性能进行分析.再次,根据此分析结果利用Workbench软件中多目标遗传算法(MOGA)对BFPC横梁进行优化.最后对优化后的BFPC填充结构横梁进行验证,结果表明:与原型横梁相比,优化后的BFPC填充结构横梁质量减轻9.14%;最大应力和最大变形分别降低6.54%和10.06%;前六阶固有频率均得到不同程度的提高,其中一阶固有频率提高8.6%;在X、Y、Z三个方向上的最大共振峰值分别降低75.56%、78.05%和75.38%.证明BFPC填充结构横梁在保证轻量化的前提下可显著提高横梁乃至整机静、动态性能的有效性.

In order to improve the machining accuracy,stability and reliability of the machine tool,a new gantry machine center crossbeam filled with basalt fiber reinforced concrete(BFPC)is proposed.First of all,the crossbeam filled with BFPC is designed based on the prototype of a gantry machine tool crossbeam.Secondly,the static and dynamic performances of the prototype crossbeam are analyzed by finite element method.Thirdly,based on the analysis results,the multi-objective genetic algorithm(MOGA)in Workbench software was used to optimize the the crossbeam filled with BFPC.Finally,the optimized the crossbeam filled with BFPC is verified,and the results show that the mass of the optimized the crossbeam filled with BFPC is decreased by 9.14%compared with the prototype one.The maximum stress and maximum deformation are reduced by 6.54%and 10.06%respectively.The natural frequencies of the first six orders are all increased to different degrees,among which the natural frequency of the first order is increased by 8.6%.The maximum resonance peak in X,Y and Z directions are decreased by 75.56%,78.05%and 75.38%,respectively.It is proved that the crossbeam filled with BFPC can significantly improve the static and dynamic performances of the crossbeam and even the whole machine on the premise of ensuring lightweight.