Abstract: In view of the personalized loading and configuration needs of end users, more and more commercial cars are put on the market in the form of chassis. During the waiting turnover and storage period of the installation, the chassis is exposed to the atmosphere for a long time, suffering from various environmental tests such as wind, rain and exposure, which brings the rust risk of the chassis turnover and storage period. In order to improve the appearance quality and rust resistance ability of the company's commercial automobile chassis, and enhance the market competitiveness of the products, this article compares and studies the four typical overall protective coating spraying processes of the commercial automobile chassis in the industry. According to the best selected spraying technology tissue test injection and market verification, a water-based dural chassis protective wax spraying technology is explored. The research results can be used for reference by the process technicians of domestic commercial vehicle production enterprises.

Key words: Commercial automobile; Chassis; Overall protective coating; Spraying process; Exploration technology optimization

摘要： 针对终端用户个性化上装配置需求，商用汽车越来越多的以底盘形式投放市场。在等 待上装搭装的周转仓储期间，底盘长时间暴露在大气下，遭受风吹、雨淋、暴晒等各种环境 考验，这样就带来了底盘周转仓储期的锈蚀风险。为提升公司商用汽车底盘外观质量及耐锈 蚀能力，提升产品市场竞争力，文章对比研究了行业内四种典型的商用汽车底盘整体防护涂 层喷涂工艺。针对研究优选出的喷涂工艺组织试喷与市场验证，探索出一种水基硬膜底盘防 护蜡喷涂工艺。研究成果可供国内商用汽车整车生产企业工艺技术人员借鉴参考。

关键词: 商用汽车；底盘；整体防护涂层；喷涂工艺；工艺优化