Journal
STROJNISKI VESTNIK-JOURNAL OF MECHANICAL ENGINEERING
Volume 62, Issue 4, Pages 213-219Publisher
ASSOC MECHANICAL ENGINEERS TECHNICIANS SLOVENIA
DOI: 10.5545/sv-jme.2015.2528
Keywords
sinusoidal ring surface; STS; kinematic characteristic; ultra-precision machining
Categories
Funding
- National Key Basic Research and Development Program (973 program) of China [2011CB706702]
- Natural Science Foundation of China [51305161, 51135006]
- Jilin Province Science and Technology Development Plan [20130101042JC]
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A sinusoidal ring surface with a large size, amplitudes in the macro-level, sub-micrometre form accuracy and nanometre surface roughness plays an important role in modern optical systems and precision calibration, but it is difficult to fabricate with traditional cutting methods. A sinusoidal ring surface with a submillimetre amplitude, machined using a slow tool servo (STS) assisted by single-point diamond turning (SPDT) is presented in this paper. The kinematic characteristic of machine axes is analysed to assess the feasibility of the turning process. The tool path generation, tool geometry optimization, and tool radius compensation are investigated for fabrication of the desired surface. A fabricating experiment of a 0.4 mm amplitude sinusoidal ring surface is performed, and the surface profile is measured with a Talysurf PGI 1240, a measurement system for the small to medium sized aspheric optics. After dealing with original measured curves, a form accuracy 0.274 mu m in peak-to-valley error (PV) and surface roughness 7.5 nm in Ra are obtained for the machined surface, and it can be seen that STS can be used for machining of a large amplitude sinusoidal ring surface.
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