在飞机的装配过程中,零件孔与衬套的安装多采用挤压扩口工艺,掌握该工艺的关键技术和影响因素,对保证零件衬套安装的可靠性具有重要意义。通过对飞机装配过程中衬套挤压扩口工艺的分析,分别从设计和制造角度诠释挤压扩口工艺的目的和达标状态,阐述挤压扩口的工作原理以及工艺加工方法的选取,从零件的疲劳强度到零件所有表面的强化处理,详细分析影响挤压扩口质量的关键因素,对解决衬套安装时的超差问题具有较强的借鉴意义,同时也论证了零件使用冷缩法安装衬套后,采用挤压扩口工艺可以增加衬套与零件之间的抗疲劳和抗应力腐蚀能力,使衬套和孔的整体配合达到最佳效果。 In the assembly process of the aircraft, parts and bushing hole installation and more use of extrusion belling process, to grasp the key technology and influencing factors of the process, to ensure the reliability of parts lining installation is of great significance. Through the analysis of the extrusion flaring process of the bushing in the assembly process of the aircraft, the purpose and standard of the extrusion flaring process are explained respectively from the perspective of design and manufacturing. The working principle of the extrusion flaring and the selection of the processing method are explained. The fatigue strength of parts to all parts of the surface strengthening treatment, a detailed analysis of the key factors affecting the quality of extrusion flares, to solve the problem of over-tolerance bushing installation has a strong reference, but also demonstrated the use of parts shrinkage method After the installation of bushings, the use of extrusion flaring process can increase the fatigue resistance and stress corrosion resistance between the liner and parts, so that the overall bushing and hole to achieve the best results.