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High-precision aluminum spinning for GIS enclosures.

Aluminum Metal Spinning for UHV GIS Enclosures

This case study presents a precision aluminum spinning component used in gas insulated switchgear (GIS), designed for high-voltage electrical applications requiring high sealing performance and internal cleanliness.

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Application

Used in GIS systems where insulation reliability and structural integrity are critical.

Core Manufacturing Process

Employs Flow Forming and Power Spinning to integrate multiple parts into a single structure. Replaces traditional拼焊 (splice welding), significantly reducing assembly deformation risks and enhancing structural integrity.

  • Monolithic Spin Forming: Consolidates multi-component assemblies into a single piece, eliminating welded structures.
  • Debris-Free Internal Contour: Chip-free interior ensures compliance with High-Voltage (HV) electrical insulation standards.
  • Tight Dimensional Tolerance (±0.1mm): Guarantees seal integrity and electric field uniformity.
  • Material Specification: 5A02-H112 (Al-Mg Alloy) for superior outdoor weathering and corrosion resistance.

Precision Control

Complies with GB/T 1804-m and GB/T 1184-K standards. Critical mating surfaces undergo 100% inspection, with dimensional stability maintained within ±0.1mm.

Surface Treatment

Mirror-grade deburring with strict adherence to "Remaining Roughness 25" and "Deburring/Edge Radiusing" standards. Internal cavity is free of metal chips, meeting high-voltage electrical cleanliness standards.

Material Adaptability

Specialized in 5A02-H112 Al-Mg alloy. The spinning process ensures the component remains stable and corrosion-resistant in harsh outdoor environments typical of power grid installations.

Technical Specifications

  • Material: 5A02 Aluminum
  • Process: Shear Spinning
  • Tolerance: ±0.1mm

Challenges

  • Complex geometry
  • Clean internal surface required
  • Welding deformation risk

Solution

  • Seamless spinning structure
  • Integrated forming replacing welding
  • 100% inspection

Results

  • Improved sealing reliability
  • Reduced assembly complexity