Process model of vehicle body-in-white welding assembly based on Polychromatic Sets

Based on Polychromatic Sets theory, the process model for body-in-white welding assembly is introduced. Firstly, the assembly relation model is built to describe the assembly relation of parts. By analyzing connection relation and interference relation, a new algorithm is proposed to generate the welding assembly sequence. Secondly, On the basis of generated assembly sequence, the process requirement of the assembly sequence is gotten by operating in the process requirement contour matrix. Finally, Equipment contour matrix are constructed to express the association of requirements and equipments. The process equipments to satisfy the requirements are obtained by searching in the contour matrix. This model provides a new way to design the vehicle body-in-white welding assembly process with high computational efficiency.