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Custom-Profile Enhanced Surface Copper Tube Rolling Blades
High-performance rolling blades for producing complex T-fin, Y-fin, and customized enhanced surface copper tubes.
- Enhancement Type:
- T-Fin, Y-Fin, Cross-Hatch & Turbo Chiller Profiles
- Applicable Standards:
- ASTM / ASME SB359 (C12200, C70600), B111, B743
- Tooling Material Grade:
- Ultra-Fine Grain Cr12MoV / HSS M2 / Cobalt-Tungsten Steel
- Geometry Tolerance:
- ±0.005mm (±0.0002") Ground Finish (Ra < 0.12 μm)
- Hardness & Heat Treatment:
- 60-64 HRC Vacuum Treated | Optional PVD TiAlN Coating
- Application Speed:
- Optimized for 1,500+ RPM High-Speed Continuous Lines
Applicable StandardsASTM / ASME B359, SB359, B111, B444, DIN EN 12451
Tooling Material GradesCr12MoV, D2, SKD11, High-Speed Steel M2, Carbide
Precision Tolerance±0.005 mm (±0.0002 in) Ground Finish
Compatible TubingCopper (C70600, C71500), Stainless Steel, Aluminum
Technical Specifications
Maximizing Phase-Change Efficiency
Enhanced surface geometries like T-fins work by creating specialized 'traps' or micro-channels that promote nucleate boiling. Our blades ensure that the geometry of these channels is perfectly consistent, providing the exact hydraulic diameter required for the refrigerant to boil or condense with minimal thermal resistance.
- Significant reduction in LMTD (Log Mean Temperature Difference)
- Enables more compact heat exchanger designs for centrifugal chillers
- Optimized for HFO (R1234ze, R1233zd) and natural refrigerants
Surface Geometry Performance Comparison
A technical comparison of how different fin profiles affect the heat transfer coefficient (HTC).
| Profile Type | Surface Area Ratio | Boiling HTC (Relative) | Tooling Precision & Tolerance |
|---|---|---|---|
| Standard Helical Fin | 2x - 4x Surface | 1.0 Base | Standard (±0.02mm) |
| Y-Profile Enhanced Fin | 6x - 8x Surface | 2.5x Higher | Advanced (±0.005mm / ±0.0002") |
| T-Profile (Turbo Chiller) | 10x - 12x Surface | 4.0x+ Peak | Ultra-Precision (±0.005mm / ±0.0002") |
Precision Folding & Undercutting
The challenge in producing T-fins lies in folding the top of the fin without fracturing the copper root. Nexmek's rolling discs use a proprietary 'gentle-deformation' curve that gradually shapes the fin tip into its final enhanced profile, ensuring zero stress-corrosion cracking and long-term tube reliability.