Goal:
To demonstrate the surface finish and flatness results achievable on calcium fluoride using a Freeform® TL machine and a Levicron milling spindle.
Process:
3 Axis milling (X, Y, Z)
Feature Details:
Test patch size: 4 mm
Material: Calcium fluoride
Process Details:
Tool radius: 1.0 mm
Milling tool: Ball End mill
Milling spindle speed: 30,000 rpm
Cutting time: 25 minutes
Feed rate: 50mm/min
Step over: 0.01 mm
Depth of cut: 40 µm
Coolant: Odorless mineral spirits
Setup photo
Part photo
Measurement methods:
Finish: Instrument: Taylor Hobson CCI
Sample area: 0.82mm x 0.82mm
Form: Instrument: Taylor Hobson CCI
Sample area: 3.6mm x 3.6mm
Results:
• Surface finish: 3.9 nm Ra
• Flatness: 80.2 nm PV
Flatness (Form)
Surface Finish
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