乙方工程(ME)+ 项目经理(PM)团队和甲方客户工程团队(PD, SQE, TE, MDE 等)一起讨论新项目镁铝合金压铸件的喷涂(Coating / Painting)表面处理的 DFM,重点是:1、压铸件喷涂的前处理工艺(去油、去毛刺、打磨、化学转化膜等);2、前处理对 附着力、耐腐蚀性、外观一致性的重要性;3、喷涂 DFM 的主要设计考量(R角、厚薄均匀、遮蔽区域、挂具夹点等)。
这个脚本涵盖了:前处理流程 → 喷涂DFM设计要点 → 风险(色差/流挂) → 改善措施 → 下一步,非常符合外企的工程讨论习惯。
下面是一个 会议沟通脚本(中英文对照)
Participants / 与会人员
Peter (ME, Supplier) / Peter(制造工程师,乙方)
Ella (PM, Supplier) / Ella(项目经理,乙方)
John (PD, Customer) / John(产品设计,甲方)
Mark (TE, Customer) / Mark(模具工程师,甲方)
Lisa (SQE, Customer) / Lisa(供应商品质工程师,甲方)
Ella (PM):
Good morning everyone. Today we’d like to review the coating process DFM for the new Mg-Al alloy die casting part. We will especially focus on surface pretreatment, which is critical for adhesion and durability.
大家早上好。今天我们想review新项目镁铝合金压铸件的喷涂DFM,重点讨论喷涂前处理工艺,它对附着力和耐久性非常关键。
Peter (ME):
Pretreatment is the foundation of coating quality. Without proper degreasing, polishing, and conversion coating, paint adhesion will fail and corrosion may appear.
前处理是涂装质量的基础。如果没有正确的去油、打磨和转化膜处理,漆膜附着力会差,还可能出现腐蚀。
Lisa (SQE):
Can you share your standard pretreatment flow for magnesium alloy?
你能分享你们对镁合金的标准前处理工艺流程吗?
Peter (ME):
Yes. Our process includes:
1、Ultrasonic degreasing → 超声波除油
2、Deburring & manual sanding → 去毛刺和人工打磨
3、Chemical conversion coating (chromate-free) → 化学转化膜(无铬)
4、DI water rinse & drying → 纯水漂洗 + 烘干
Peter (ME):
From the design side, we suggest:
1、Avoid sharp corners (min R0.5mm) to improve paint coverage.
2、Ensure even wall thickness to prevent paint sagging.
3、Define non-painting areas (masking zones) early.
4、Provide stable hanging points for painting fixtures.
在设计方面,我们建议:
1、避免尖锐角(至少R0.5mm),提高涂层覆盖性。
2、保证壁厚均匀,避免流挂。
3、提前定义非喷涂区域(遮蔽区域)。
4、预留挂具固定点,方便喷涂治具设计。
John (PD):
Got it. We’ll check if some ribs and bosses need adjustment to meet the coating requirement.
明白。我们会检查一下肋位和柱位是否需要调整以满足喷涂要求。
Lisa (SQE):
In previous projects, we saw color variation on large surfaces. How do you plan to control that?
在之前的项目里,我们遇到过大面积外观件的色差问题。你们怎么计划控制?
Peter (ME):
Two measures:
1、Strict pretreatment to ensure uniform base surface.
2、Standardized spray gun parameters and curing oven settings, verified by DOE.
两个措施:
1、严格的前处理,保证基底表面一致。
2、喷枪参数和烘烤炉设定标准化,并通过DOE验证。
Ella (PM):
We will summarize today’s DFM comments and share by [date]. After your approval, we’ll update the DFM package and prepare the coating DOE plan.
我们会在[日期]前整理今天的DFM意见并分享。你们确认后,我们会更新DFM文件并准备喷涂的DOE方案。
John (PD):
Sounds good. Please highlight any risk items that may impact cosmetic acceptance.
好的,请在总结中标注可能影响外观验收的风险点。