Goal:
Demonstrate the surface finish results achievable with local spiral milling of a brass pin using Levicron’s 80K RPM high speed air-bearing tooling spindle.
Levicron High Speed Air-Bearing Tooling Spindle
Process Step:
• Program using Diffsys lens array utility
• Finish in one pass
Part Details:
• Material: Brass
• Lenslet diameter: 1.8 mm
• Spherical radius: 1.2 mm
• Depth: 0.406 mm
• Mar Slope: 49˚
Process Details:
• Tool: Chardon Tool diamond ball end mill
• Radius: 0.50 mm
• Spindle speed: 80,000 RPM
• Surface speed: 400 mmpm
• Feed rate: 5 micron/rev
• Spiral Pitch: 5 µm
• Coolant: Ordorless Mineral Spirits (OMS)
Results:
• Total process time: 90 sec/lenslet
• Finish: 1.494 nm Ra (Gaussion filter, .08 mm)
• Form: 300 nm PV
(taken on Taylor Hobson CCI)
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