大型民用飞机生产基地分散、装配质量要求高,在总装对接中出现装配不协调问题将会导致交付延期、成本增高.采用合理工艺手段确保零部件装配质量并能够对存在问题的零部件进行返修与调整是确保飞机总装质量的关键.将虚拟装配与数字化测量结合起来,通过采集不同机身分段对接关键特性外形、尺寸数据,将不同机身分段的测量数据拟合在同一个机身坐标系实现测量数据的虚拟装配,计算虚拟装配后对接要素之间的间隙、阶差、夹角以及形位公差等参数,依此评价机身分段装配对接后能否达到技术要求并为存在的问题提供解决方案与修正量.首先提出基于测量数据的虚拟装配技术,其次对该技术的关键点进行了研究并结合某型飞机机身分段装配对接进行技术验证与应用,该技术的应用有效降低了机身分段的返修率、提高了总装对接速度,取得了良好的效果.%Large civil aircraft has a feature of dispersed production base and high assembly quality requirements,the problem that uncoordinated assembly occurs in the process of join-assembly will result in the delivery extension and higher costs.The reasonable crafts technology and repair ability of the parts with problems are the key points of ensuring the final assembly quality.We combine the virtual assembly technology and digital measurement technology,collect the actual shape and size data of key features of different fuselage segment assembly,achieve the purpose of virtual assembly by fitting the different fuselage segment measurement data into one same fuselage coordinate system,calculate the gap,adjacent difference,angle and other GD & T parameter with the result of virtual assembly,evaluate the assembly quality and provide solution and repair amount for the existing issues of the evaluation results.Firstly,we propose the technology of the fuselage segments virtual assembly based on measurement data,secondly research the key points of the technology and use it in one aircraft fuselage join-assembly process.The application of this technology reduces the failure rates and improves the final join-assembly speed,which gets one good effect.
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