第15卷第3期 2017年6月
中国工程机城学报
CHINESE JOURNAL OF CONSTRUCTION MACHINERY
Vol. 15 No.3 Jun.2017
航空长梁整体结构件加工变形预测及校正分析
黄晓明12,孙杰2，李剑峰2
（1.滨州学院机电工程系，山东滨州256600；2.山东大学机城工程学院，济南250061）
摘要：航空整体结构件的加工变形和变形校正是制约结构件加工效率的瓶颈技术，针对长渠零件加工后出现变形问题，构建薄壁长梁整体结构件加工变形有限元模型进行数值计算.研究表明，在毛坏初始应力和加工应力的作用下，长梁件出现弯曲扭转复合变形，工件结构刚度不对称是导致工件弯曲变形的重要原因.以变形结果作为校正目标模型，进行加载-卸载反弯和扭转校正分析，对校正参数、校正载荷施加形式及校正效果等关键技术进行研究，根据长梁整体结构件变形校正图谱，当在-Y方向施加9050N4点反弯校正载荷，在垂直X顺时针方
向施加145×10°N·m矫正扭矩时，可以得到理想的校正效果关键词：加工变形；变形校正；有限元数值模拟；长梁整体结构件
中图分类号：TP391.73
文献标志码：A
文章编号：16725581(2017)03021006
Analysisofbeamaerospacemonolithiccomponentsmachining
deformationpredictionandcorrection
HUANGXiaomingl-2，SUNJie"，LIJianfeng
(1. Mechatronics Engineering Department, Binzhou University ,Binzhou 256600, Shandong, China:
2.School of Mechanical Engineering, Shandong University,Ji'nan 250061, China)
Abstract:The machining deformation of aerospace monolithic components is bottleneck problem for aviation manufacturing industry. We construct the beam machining deformation and distortion correction finite element model to study the problem. According to the finite element method (FEM) result, deformation characteristics were obtained. Studies show that the bending and torsion deformation is a universal phenomenon for the beam aerospace monolithic components under the coupling effect of blank original residual stresses and machining residual stress,and the asymmetry structure stiffness of the beam is an important reason leading to deformation. Deformation characteristics were used to evaluate the correcting effect. Correcting key technology such as determination of straightening parameters,anti-bend and anti-twist load were studied. For typical deformational beam,correcting characteristics and correcting rule were given. The ideal correction results were 9 050 N anti-bend load in - Y direction and 145 × 103 N ·m anti-twist load were applying to the example.
Key words: machining deformation; straightening; finite element method(FEM) numerical simulation; beam aerospace monolithic components
随着航空制造工业的快速发展，为减轻飞机重量，提高飞机的各项机械性能，大型航空整体结构件逐渐替代了传统的螺栓连接和铆接的飞机组合件.尽管整体薄壁件在航空工业中有着诸多的优
基金项目：国家自然科学基金资助项目（51275277）
点，然而多年来，整体薄壁结构件的加工变形问题一直困扰着航空工业.即使采用高速加工方法加工大型梁框类整体结构件，其变形问题也未能得到彻底解决.加工变形问题已经成为几乎所有大型飞机
作者简介：黄晓明（1981一），男，副数授.博士.E-mail；hxm2552@163.con 万方数据