The Surface Finish and Form Accuracy Results on a Steep Slope Aluminum Asphere

Using the Nanoform® X with the HS150 work holding spindle on a steep slope aluminum asphere, it is possible to achieve surface finish and form accuracy results.

Nanoform X

Figure 1. Nanoform X

Process and Process Details

The process involves 2-axis diamond turning (X, Z) with tool radius measuring 0.5mm, spindle speed of 2,000 rpm, and feed rate of 5mm/minute. The depth of cut is fixed as 2µm and the coolant used is odorless mineral spirits.

Part Details

The measurements of the parts are as follows:

  • Material: aluminum
  • Spherical radius: 2.5mm
  • Outer diameter: 8mm
  • Maximum slope: 52 degrees

Measurement Methods

The finish method requires the use of Taylor Hobson CCI instrument. The sample area measures 150µm x 150µm. The form method requires the use of the form Talysurf instrument.

Results

The Nanoform® X is capable of achieving surface finish and form accuracy results. The surface finish result procured was 1.43nm Sa, and the form precision measured 0.058µm PV and 0.013µm RMS.

This information has been sourced, reviewed and adapted from materials provided by Precitech.

For more information on this source, please visit Precitech.

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