关键词: 涂装车身；工艺参数；生产工艺；颗粒缺陷

Abstract: This article analyzes the electrophoretic and topcoat particles generated on the surface of the car body from several aspects, including pre-treatment equipment, process parameters, personnel operation, and production process, based on the particle problem of the painted car body of our company's light passenger series models, and discusses their adverse effects. And process validation analysis is conducted on how to reduce the electrophoretic and topcoat particles on the surface of painted car bodies. Effective control of the occurrence of car body particles is achieved through optimizing the production process flow, pre-treatment tank liquid guide groove, personnel training, and clean workshop environment. Ultimately, the polishing amount of car body particles is significantly reduced, and methods for reducing the effect of car body particles are summarized, and this method has achieved good results in the actual production process, laying a solid foundation for the subsequent production of high-quality products.

Key words: Painted body; Process parameters; Production process; Particle defects