QC
Raw Material Inspection Standards
General Inspection Criteria
At Yafeng Glasses, we implement stringent quality control protocols for all incoming materials to ensure compliance with our exacting standards.
Material Verification:
Confirm that the material type, specifications, and dimensions match the purchase order requirements.
AQL Sampling:
Components: AQL 2.5 (Major defects)
Lenses: AQL 1.5 (Critical defects)
Copper Pin Inspection
• Confirm the material and part number match the order requirements.
• Check all dimensions against the approved drawing.
• Ensure the spring mechanism opens smoothly and closes automatically without noise.
• Verify the shape matches the approved sample and drawing.
• Inspect the surface for a smooth finish with no burrs, flash, or visible defects.
Process Inspection Standards
Comprehensive In-Process Quality Control
At Yafeng Glasses, we implement specialized QC checkpoints across all production stages:
- Soldering QC: Verifies joint strength (30N pull test) and alignment (±0.1mm tolerance)
- Metal Polishing QC: Checks surface smoothness (Ra ≤0.8μm) and defect-free edges
- Electroplating QC: Ensures coating adhesion (tape test) and salt spray resistance (48hrs)
- Acetate Polishing QC: Confirms gloss uniformity and structural integrity
- Assembly QC: Validates hinge function and final fit
- and so on
Each checkpoint follows ISO 9001 protocols with real-time defect tracking.
For example, the following are the detailed quality control criteria for our electroplating process:
Finished Product Inspection Standards
Multi-Stage Finished Product QC Inspection
We implement rigorous quality checks at every production stage:
Surface Inspection: No scratches/dents (40W LED light verification)
Printing Accuracy: ±0.2mm alignment tolerance
Functional Testing: 5K hinge cycles, 30N temple flex
Cosmetic Audit: Color/Pantone match (ΔE≤1.5)
All inspections follow ISO 9001 protocols with digital traceability.
