B axis rotating machining of microstructured optical molds with rotational symmetry based on ultra-precision cutting

GAO Xing; LI Yong; ZHONG Hao; YUE Quan; LI Chaojiang

doi:10.16511/j.cnki.qhdxxb.2017.22.002

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Journal of Tsinghua University(Science and Technology) ›› 2017, Vol. 57 ›› Issue (2) : 120-127. DOI: 10.16511/j.cnki.qhdxxb.2017.22.002

MECHANICAL ENGINEERING

B axis rotating machining of microstructured optical molds with rotational symmetry based on ultra-precision cutting

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Abstract

A B axis rotating machining process based on ultra-precision cutting was developed to prevent burrs, sharp corner defects and surface scratches when machining microstructured optical molds with rotational symmetry. The form accuracy and surface quality of the molds were mainly influenced by the machining path, cutting speed, B axis rotating speed and cutting depth. Tests of these factors were used to optimize the cutting trajectory planning and machining parameters. Two microstructured molds were constructed with no sharp corner defects and no surface scratches, dimensional accuracies of 1.4 μm and surface roughnesses better than 14 nm. The results show the feasibility of the B axis rotating machining process for cutting microstructured optical molds with rotational symmetry.

Key words

ultra-precision cutting / B axis rotating machining / rotationally symmetric microstructure / optical mold / structure integrity

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GAO Xing, LI Yong, ZHONG Hao, YUE Quan, LI Chaojiang. B axis rotating machining of microstructured optical molds with rotational symmetry based on ultra-precision cutting[J]. Journal of Tsinghua University(Science and Technology). 2017, 57(2): 120-127 https://doi.org/10.16511/j.cnki.qhdxxb.2017.22.002

References

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