【摘要】 针对航空结构件中大型长桁零件薄壁部分易变形难加工的特点,对其进行了数控加工工艺规程的制定以及工装夹具系统的设计。为了提升长桁零件的动态性能,利用有限元分析软件对长桁零件进行了模态分析和谐响应分析,获取其固有频率、发生共振的频率以及共振的幅值,并预测零件的变形情况。研究结果表明:长桁零件的加工方案存在改进的空间,可根据相关分析结果优化其铣削参数,改进加工方案,进一步提升长桁零件表面的加工质量。更多还原

【Abstract】 The thin-walled parts of large long truss of the typical aviation structural parts are easy to deform and difficult to process. The process specification is developed for NC machining and design of the jig and fixture system. The paper analyzes the long truss modal and harmonic response with finite element analysis software in order to enhance the dynamic performance of truss parts. Natural frequency, resonance frequency and resonance amplitude is obtained and prediction of the parts deformation is achieved. The research results show that the machining scheme of the long truss parts can be improved, the milling parameters could be optimized according to the relevant analysis results, and the modified processing scheme can further improve the machining quality of the long truss parts.更多还原