Views: 0 Author: Site Editor Publish Time: 2026-07-10 Origin: Site
• 标题: How to Qualify a Chinese Sheet Metal Supplier in 5 Steps (2026 Guide)
• 描述: A practical 5-step framework for OEMs to evaluate and qualify Chinese sheet metal fabrication suppliers.
• Slug: /How-to-Qualify-Chinese-Sheet-Metal-Supplier-5-Steps-id00000004.html
Process | Ask About | Red Flag |
Laser cutting | Number of machines, power, tolerance | Cannot state ±tolerance |
Bending | Brake press count, max length, angle accuracy | ≤3 brake presses |
Welding | Robotic vs manual, certifications, yield rate | No documented yield data |
Surface treatment | Line count, pretreatment type, salt spray | Cannot produce test reports |
Quality system | ISO certifications, inspection points | ISO 9001 not certified |
• What was your defect rate last month? (Target: ≤0.3%)
• Can you show salt spray test reports from the past 3 months? (Target: ≥500 hours)
• How do you measure coating thickness? (Target: ±10 µm control)
• What is your first-article inspection process?
• How do you handle non-conforming products? (8D or 5-Why)
Factor | Good Supplier | Average Supplier |
English proficiency | Dedicated English-speaking PM | Broken English |
Response time | ≤4 hours | 24-48 hours |
DFM feedback | Proactive suggestions within 1 day | Silent until you ask |
Problem handling | Early warning + proposed solution | Tells you after the problem |
• Rework / rejects: 5-15% additional cost
• Expedited shipping: 10-30% additional cost
• Communication delays: 5-10% project overhead
• Quality audit travel: $2,000-5,000 per visit
Phase | Scope | Duration | Decision Gate |
Drawing review | 2-3 representative drawings | 2-3 days | Supplier identifies ≥2 improvements |
Sample (FAI) | 3-5 units of 1-2 part numbers | 7-10 days | 100% dimension check pass |
Pilot batch | 50-100 units | 15-20 days | Production yield ≥99.5% |
First production | Full quantity | Per lead time | On-time ≥95% + quality pass |
Ready to qualify DINGPRECISION as your sheet metal partner? Contact our engineering team
Request a Custom IP-Rated Enclosure Quote
Phone: +1 3142997740
Email: niewenhui@dingprecision.com
Website: www.dingprecision.com
