摘要
机床横梁是机床零部件主要支撑部件,对机床的加工精度影响很大,因此,需要对横梁自身的结构进行优化,以提高机床加工精度。文中首先对原横梁进行仿真分析,并依次分别对横梁薄弱位置的结构、筋板结构、筋板厚度进行了设计与分析,采用灰色关联—层次分析法对不同筋板厚度的横梁进行分析与数据处理,最终获得最优方案。结果表明,横梁"井"型筋板结构设计,上导轨支撑筋板倾斜55°,筋板厚度15mm为最优方案,优化后横梁质量减轻了751kg,形变量减少了3.6%,一阶固有频率增加了3.5%,优化设计效果明显,为机床其它零部件的设计提供了方法参考。
The crossbeam is the main supporting part of machine tool and has great influence on the machining accuracy.Therefore,it's necessary to optimize the structure of the crossbeam to improve the machining accuracy. Firstly simulation analysis was carried out on the original crossbeam,and respectively designed and analyzed the weak beam position structure,stiffened plate structure and the thickness of stiffened plate. Using grey relational analysis and analytic hierarchy process(AHP)on the analysis and data processing of different thickness of rib beam,and ultimately get the best scheme. The results show that the beam with"JING"type rib structure,supporting guide rib plates are inclined to 55°,stiffened plate thickness of15 mm is the optimal solution. After optimization,the effect is obvious that the deformation is reduced by 3.6% and the firstorder frequency increased by 3.5%,while the weight reduced by 751 kg,which provides a reasonable method for the design of other parts of the machine tool.
出处
《机械设计与制造》
北大核心
2018年第3期26-29,共4页
Machinery Design & Manufacture
基金
江苏省科技成果转化专项资金项目(BA2015126)
南通市重大科技项目(XA2014011)
关键词
机床横梁
优化设计
灰色关联法
层次分析法
有限元分析
The Crossbeam of Machine Tool
Optimization Design
Grey Relational Analysis
Analytic Hierarchy Process
Finite Element Analysis
