BFPC数控车床斜床身拓扑优化设计及其性能分析

Topological Optimization Design and Performance Analysis of BFPC Oblique bed CNC Lathe

为提高机床基础件静、动态性能和轻质性,以某数控车床斜床身为原型,初步设计玄武岩纤维树脂混凝土(Basalt fiber polymer concrete,BFPC)斜床身,分析典型工况下该床身的受力情况,并对两种床身的静态、动态特性和质量进行仿真分析和计算;对BFPC床身进行拓扑优化设计,根据拓扑优化设计结果和BFPC床身的制造工艺性,重构BFPC床身结构,以其减重孔尺寸参数为因素,以其前六阶模态的固有频率和质量为试验指标,进行单因素轮换试验研究,最终确定其数值;对优化后的BFPC床身的静、动态性能和轻质性进行仿真分析和计算,再与原型和优化前的BFPC床身的相应性能进行对比分析。结果表明,拓扑优化设计后的BFPC床身在静、动态性能和轻质性方面都明显优于后两种床身。

To improve the static and dynamic performance and lightness of a machine tool. This paper take a CNC lathe＇s oblique bed as the prototype preliminary design of a basalt fiber polymer concrete（ BFPC） oblique bed and analyze the force of the oblique bed under typical working conditions. The static and dynamic characteristics of the two kinds of oblique bed are simulated and analyzed. Then,the optimization design of the BFPC oblique bed is carried out according to the topological optimization results and manufacturing processes of the BFPC oblique bed,whose structure is reconstructed. With the factor of its weight reduction pore size taken into consideration,the natural frequency of the first six modes are used as experimental indexes. Finally,experiments on single-factor rotation is conducted to determine the numerical value. The static and dynamic performance and lightness of the optimized BFPC bed are simulated and calculated and then compared with the prototype and optimized BFPC oblique beds before their corresponding performance is analyzed. The results show that the topologically optimized BFPC oblique bed is obviously better than the latter two in terms of static and dynamic performance and lightness.