Multi-factor based analysis and statistical process control for body-in-white dimension status

With the tremendous improvement of industrial manufacturing, the methods and technology of automobile industry have made great progress. As a significant factor determining the appearance of vehicle models, the dimension control of body-in-white (BIW) also has constantly optimization in the continuous innovation of automotive products. The dimension control of BIW is of great importance in the production process and plays a connecting role in automobile manufacturing. As for actual BIW production, not only a complete body framework is established through the assembly of stamping parts, but also the hang-on parts are preliminarily installed and matched with the body framework to form the basis for the assembly of following parts. In this study, current researches and methods of BIW dimension control in automobile industry are summarized and illustrated. Then, factors which affecting the dimension status of BIW are classified and highlighted by main types. The model and system of process control based on data analysis are established. Finally, the model and strategy are sufficiently validated by test result.