关键词: 汽车外饰件；面差匹配；虚拟装配；尺寸偏差

Abstract: As people's requirements for the appearance and feeling of automobiles are getting higher and higher, enterprises are becoming more and more strict in the control of the gap and surface difference between the decorative parts of automobiles. Aiming at the complex matching structure involving many parts in the assembly process, this paper proposes a matching optimization control method based on three-dimensional control systems (3DCS). First, 3DCS is used to calculate the contribution degree of each deviation in the dimensional chain, and then the influencing factors with large contribution rates are found out. Finally ensure that the gap between the exterior parts, surface difference match. This study has some guidance for improving the quality of gap difference matching between automotive exterior decorative parts.

Key words: automotive exterior trim; surface difference matching; virtual assembly; dimensional deviation