| 飞机整体结构件加工变形的初始残余应力-初始几何误差耦合影响与控制 |
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| 引用本文： | 林锋,姚婉,秦国华,叶海潮,陶江. 飞机整体结构件加工变形的初始残余应力-初始几何误差耦合影响与控制[J]. 兵工学报, 2021, 42(12): 2731-2742. DOI: 10.3969/j.issn.1000-1093.2021.12.021 |
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| 作者姓名： | 林锋 姚婉 秦国华 叶海潮 陶江 |
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| 作者单位： | 南昌航空大学 航空制造工程学院,江西 南昌330063 |
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| 基金项目： | 国家自然科学基金项目(51765047);江西省主要学科学术和技术带头人计划项目(20172BCB22013);江西省科技厅重点研发计划项目(20203BBE53049) |
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| 摘 要： | 随着高速铣削中材料的去除,毛坯初始残余应力的释放必将引起飞机整体结构件的加工变形.分析具有初始几何误差的毛坯初始残余应力释放造成的加工变形是控制加工质量的核心,对于实现加工过程的精密化至关重要.建立加工变形的力学模型及其相应的有限元方法,揭示毛坯初始几何误差对零件变形的影响规律.以最小变形为目标建立加工位置的优化模型,...
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| 关 键 词： | 飞机整体结构件 初始残余应力 初始几何误差 加工变形 加工位置 步长递减算法 |
Coupling Effect of Initial Residual Stress-initial Geometric Error on Machining Deformations of Aeronautical MonolithicComponents and Its Control |
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| LIN Feng,YAO Wan,QIN Guohua,YE Haichao,TAO Jiang. Coupling Effect of Initial Residual Stress-initial Geometric Error on Machining Deformations of Aeronautical MonolithicComponents and Its Control[J]. Acta Armamentarii, 2021, 42(12): 2731-2742. DOI: 10.3969/j.issn.1000-1093.2021.12.021 |
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| Authors: | LIN Feng YAO Wan QIN Guohua YE Haichao TAO Jiang |
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| Affiliation: | (School of Aeronautical Manufacturing Engineering,Nanchang Hangkong University,Nanchang 330063,Jiangxi,China) |
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| Abstract: | In the process of high-speed milling,the release of initial residual stress will cause the machining deformation of aeronautical monolithic component. The machining deformation caused by the initial residual stress release of blank with initial geometric error should be analyzed to control the machining quality,which is very important for the precision machining process.A mechanical model of machining deformation and a finite element method are established to reveal the influence of the initial geometric error of blank on the workpiece deformation. An optimization model of machining position is established with the minimum deformation as the objective. According to the condition that the increment of two adjacent machining positions does not exceed the threshold,a step decreasing algorithm of the optimization model is proposed. The results show that the model calculated values are in good agreement with both the finite element simulated values and the experimental results whether in deformation trend or amplitude. When the blank has initial geometric error or no initial geometric error,the optimal machining positions of the three-frame integral structure are 22.754 3 mm and 23.265 mm,and the corresponding deformation values are -0.006 mm and -0.007 mm,respectively. When the blank has no initial geometric error,its deformation at the position of 22.754 3 mm is 0.043 mm,and when the blank has initial geometric error,its deformation at the position of 23.265 mm is -0.144 mm.It is further verified that the initial geometric error of the blank has a great influence on its deformation. |
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| Keywords: | aeronauticalmonolithiccomponent initialresidualstress initialgeometricerror machiningdeformation machiningposition stepdecreasingalgorithm |
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