基于ICM法的龙门式加工中心焊接横梁结构设计与优化

Design and Optimization of Gantry Machining Center Welding Crossbeam Structure Based on the ICM

目的分析异型石材锯铣复合加工中心的工况,提出一种焊接式横梁的结构设计与优化方法,以提高关键部件横梁的动、静态特性.方法将横梁焊接工作过程中的各肋板作为独立单元,建立数学模型,设置边界条件,应用连续体ICM拓扑优化方法,对横梁肋板结构优化和肋板的分布进行设计规划.结果应用ICM法改进设计的异型石材锯铣加工中心横梁,在保证加工精度要求的前提下,其整体质量可以降低24.18%,生产成本较低约6.91%.结论该ICM拓扑优化方法有效地降低了优化求解规模和约束数目,计算效率得到提高,打破了传统经验设计的单一化,为今后的制造业结构轻量化设计提供了一种新思路.

The aim of this paper is to analyze the working condition of the multi-type stone sawing milling center,study the structure design and optimization method of a welded beam,and improve the dynamic and static characteristics of key component beams. Therefore,a kind of welding crossbeam structure design and optimization method are studied,through each floor crossbeam welding in the process of working as an independent unit,establish the mathematical model,and use continuum ICMtopology optimization method,to optimize the structure of the crossbeam floor and plan the distribution of floor. Applying this method to improve design of special shape stone and milling machining center crossbeam,and meeting the machining accuracy,its overall quality reduce24. 18%,and reduce production costs by about 6. 91%. This ICMtopology optimization methodreduces the size of optimization and the number of constraints,improves the computational efficiency,and breaks the simplification of traditional empirical design,which provides a newidea for the light quantitative design of manufacturing structure in the future.