1. Project Planning & Design Phase

1.1 Design Parameter Standardization

  • Load calculations: Wind load (0.5-1.5kN/m² per GB 50009), seismic grade (6-8度设防)
  • Connection design: Bolted joints (10.9S grade) with slip factor ≥0.35
  • Modeling software: Tekla Structures (公差±0.1mm), BIM collision detection

1.2 Material Specification

  • Steel plate selection:
    • Thickness range: 6-100mm (Q355B yield strength ≥355MPa)
    • Zinc coating: 275g/m² for C3 corrosion environment
  • Supplementary materials:
    • Welding wire: ER50-6 (AWS A5.18 standard)
    • Paint systems: 3-coat epoxy-polyurethane (DFT 280μm)

2. Precision Manufacturing Process

2.1 Cutting Technology Matrix

Method Tolerance Kerf Width Application
Plasma ±1.2mm 3-5mm Thickness >25mm
Laser ±0.3mm 0.2-1mm Precision joints
Waterjet ±0.5mm 0.8-1.2mm Composite materials

2.2 Welding Quality Control

  • Procedure qualification:
    • Preheat temp: 100-150℃ (t≥25mm)
    • Interpass temp: ≤230℃
  • NDT methods:
    • UT: Level B scanning (defect ≤Φ3mm)
    • RT: Class II per EN ISO 5817

3. Automated Assembly System

3.1 Robotic Fabrication

  • Positioning accuracy: ±0.05mm (6-axis robots)
  • Clamping force: 5-20kN (vacuum/pneumatic)
  • In-process inspection: 3D laser scanning (0.02mm resolution)

3.2 Modular Construction

  • Unit weight limit: ≤50 tons (road transport)
  • Interface tolerance:
    • Bolt holes: ±1.0mm
    • Shear connectors: ±2mm vertical

4. Advanced Coating Process

4.1 Surface Preparation

  • Blasting profile:
    • Angular anchor pattern (40-75μm)
    • Soluble salt limit: ≤20mg/m² NaCl
  • Environmental controls:
    • Air dew point: ≤3℃ above substrate
    • Relative humidity: 40-60%

4.2 Curing Parameters

  • Infrared curing:
    • Peak metal temp: 80-100℃
    • Exposure time: 8-12 minutes
  • Adhesion test: ≥5MPa (ISO 4624 cross-cut)

5. Digital Quality Assurance

5.1 IoT Monitoring

  • Weld tracking:
    • Arc voltage: 28±2V
    • Wire feed speed: 8-12m/min
  • Coating thickness:
    • Continuous measurement (XRF technology)
    • Data logging per ISO 19840

5.2 Blockchain Documentation

  • Material traceability:
    • QR code tracking (from mill to site)
    • Automated MTC verification
  • Non-conformance management:
    • RFID tagging for quarantine parts
    • Automated alert system
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