Quality control procedures

‌I. Core Control Points & Standards‌

1. ‌Design Phase‌:

   • Drawing Review: Compliant with ‌ISO 8015:2025‌ geometric tolerance specifications; critical dimension tolerances ≤±0.02mm.

   • Material Selection: Match material hardness (HRC 48-62) based on mold lifespan requirements; provide ‌ISO 6892-1:2025‌ material certification.

2. ‌Processing Stage‌:

   • ‌CNC Machining‌: Surface roughness Ra ≤0.8μm (precision molds: Ra ≤0.2μm); tool wear compensation frequency ≤500 pieces/tool.

   • ‌Heat Treatment‌: Vacuum quenching hardness deviation ≤±1.5 HRC; tempering temperature fluctuation ≤±5℃ (compliant with ‌AMS 2750F‌).

   • ‌Surface Treatment‌: PVD coating thickness error ≤±0.3μm; coating adhesion ≥80N (tested per ‌ASTM C1624‌).

3. ‌Assembly & Debugging‌:

   • Mold clamping gap ≤0.03mm; slider friction coefficient ≤0.1 (after lubrication).

   • Trial runs ≥3 times; must pass ‌ISO 20417:2025‌ stability test before mass production.

‌II. Quality Inspection Methods & Standards‌

‌III. Non-Conforming Product Handling‌

1. ‌Defect Classification‌:

   • ‌Category A‌ (Critical): Dimension error >0.1mm, cracks, coating peeling → ‌Immediate scrapping‌.

   • ‌Category B‌ (Major): Surface roughness超标, hardness deviation >3% → ‌Rework + full inspection‌.

   • ‌Category C‌ (Minor): Non-critical surface scratches (depth <0>

2. ‌Corrective Actions‌:

   • Root Cause Analysis: 8D report within 48 hours, including ‌Fishbone Diagram‌ and ‌5Why analysis‌.

   • Preventive Optimization: Update process parameter database; trigger ‌ISO 9001:2025‌ internal audit.

‌IV. User-Side Quality Acceptance Requirements‌

1. ‌Documentation Delivery‌:

   • Mandatory: Material certification, heat treatment curves, full-dimension inspection report, RoHS/SVHC compliance declaration.

   • Optional: CAE mold flow analysis report, DFMEA (Design Failure Mode Analysis).

2. ‌On-Site Acceptance‌:

   • Functional Test: ≥99.5% yield rate in 100 consecutive productions.

   • Safety Requirements: Edge rounding (R≥0.2mm); grounding resistance ≤0.1Ω (for anti-static molds).

‌Notes‌:

1. All processes require ‌IATF 16949:2025‌ automotive industry certification (for automotive molds);

2. Environmental requirements: Waste recycling rate ≥95%, compliant with ‌EU 2025/EC Green Manufacturing Directive‌.