基于残余应力场原位推断的结构件加工顺序优化方法

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关键词：残余应力场；变形力；加工顺序优化；加工变形控制中图分类号： 文献标志码：A

Optimization method of machining sequence for structural components via in-situ residual stress field inference

XUYiyun1，LIU Changqing1，ZHANG Yifan1，ZHAO Zhiwei1，MAWenrui² （1.ColegeofchancaldElectricalEngineeng，NningUvesityfroaticsdAstroaticsNjgCin; 2.Shanghai Aircraft Manufacturing Co.， Ltd.， Shanghai 2Ol324， China）

Abstract： Large aircraft structural components are highly susceptible to complex deformation under the influence of residual stress fields after machining. An optimization method of machining sequence based on in-situ inference of residual stress fields was proposed. The proposed method monitored workpiece deformation forces in real-time during the rough machining stage， in-situ infered the blank residual stress field distribution， and employed the temporal uniformity of deformation forces as an evaluation criterion， combined with finite element simulation， to achieve machining sequence optimization.Comparative experiments were conducted on a three-meter-scale aluminum alloy aircraft structural component. The experimental results demonstrate that after optimization， 99.31% of the global deformation of the part is less than 0.2mm ， the proportion of the high-precision region （deformation ⩽ 0.1mm ）increases from 48.48% to 81.94% ， and the average deformation decreases from 0.109mm to 0.059mm . This method effectively suppresses the machining deformation of large structural components.

Keywords： residual stress field; deformation force; machining sequence optimization; machining deformation control

航空大型结构件作为飞机的主要承力和重要连接部件，其制造精度对整机性能具有至关重要的影响。（剩余11354字）