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To improve the first pass yield rate of polish line in an automobile paint shop, this paper focuses on the critical top coat defects such as crater, other paint, paint runner, solvent spot and paint sludge. The research diagnoses the root causes of various defects systematically through Manufacturing Report System (MRS) quality analysis system and "human, machine, material, methodology, environment" real reason analysis method combining infrared spectrum, element analysis and production verification. There are some targeted countermeasures to solve the defect issues such as changing the fluorine-containing lubricating grease of high temperature zone, optimizing top coat color sequence, strengthen equipment pre-maintenance, adjusting process parameter and changing fault part. The first pass yield of polish line increases from 79% to 91% and the average daily line downtime is reduced by 62% due to the countermeasures implementation. The research shows that systemtic root cause analysis and precise process impoovements are the key to enhancing coating quality and production efficiency.

, authors=Mengzhe Tian, authorsList=Mengzhe Tian, authorCompany=null, correspAuthors=null, authorNote=null, correspAuthorsNote=null, copyrightStatement=null, copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=null, magXml=null, pdfUrl=null, pdf=null, pdfFileSize=null, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=null, mapNumber=null, fund=null), CN=ArticleExt(id=1309475240267310062, articleId=1309475239826908140, tenantId=1146029695717560320, journalId=1189873562199433220, language=CN, title=汽车涂装车间精修线一次交验合格率提升, columnId=1190284220841955836, journalTitle=汽车工艺与材料, columnName=生产现场, runingTitle=null, highlight=null, articleAbstract=

为提升汽车涂装车间精修线一次交验率，针对缩孔、杂漆、流漆、溶剂点及漆渣等核心面漆缺陷展开研究。运用生产制造报告系统（MRS）及“人、机、料、法、环”真因分析法，结合红外光谱、元素分析及生产验证等手段，系统诊断了各类缺陷的根源。通过更换高温区含氟润滑脂、优化喷涂颜色排序、加强设备预防性维护、调整工艺参数及更换故障部件等措施，使精修线一次交验合格率由79%提升至91%，日均堵线时间缩短62%。研究表明，系统性根因分析与精准工艺改进是提升涂装质量与生产效率的关键。

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田孟辙（1988—），男，高级工程师，硕士学位，研究方向为汽车涂装车间工艺参数及机器人喷涂程序设计、优化与产品质量控制。

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田孟辙（1988—），男，高级工程师，硕士学位，研究方向为汽车涂装车间工艺参数及机器人喷涂程序设计、优化与产品质量控制。

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