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| Restructuring Method of Tooling With Less Redundant Constraints in Aircraft Assembly Line |
| BA Xiaofu 1,2， XUE Hongqian1 ， LI Xining1 |
| (1. Northwestern Polytechnical University, Xi’an 710072, China; 2. AVIC Xi’an Aircraft Industry Group Co., Ltd., Xi’an 710089, China) |
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Abstract In order to improve the restructuring performance of tooling in aircraft assembly line to meet the assembly requirements of various aircraft types, a method of tooling restructuring with less redundant constraints is proposed. Based on all redundant constraint model and non redundant constraint model analysis of tooling and connection pairs, and balance analysis of efficiency of tooling restructuring and stiffness of tooling restructuring, by releasing some constraint degrees of freedom which have little influence on the restructuring stiffness but great influence on the restructuring efficiency, the mathematical model of the restructuring with less redundant constraints is established, and then the structural model of the restructuring with less redundant constraints is established. On this basis, the restructuring design of tooling is carried out. The analysis shows that the restructuring performance of the aircraft assembly line tooling can be greatly improved based on the restructuring method with less redundant constraints, in which the restructuring efficiency can be increased by 3 times and the number of connection pairs brought into the restress can be reduced by 50%.
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2021, 
