Feasibility study of the novel quasi-elliptical tool servo for vibration suppression in the turning of micro-lens arrays

Zhiwei Zhu, Suet To, Wu Le Zhu, Peng Huang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

16 Citations (Scopus)

Abstract

Starting from a mathematical explanation of the underlying mechanism for vibration suppression, a quasi-elliptical tool servo (QETS) technique and the corresponding optimal toolpath determination algorithm are proposed to overcome the inherent defects in F-/STS turning of MLAs. As for the QETS, the inherent non-smooth servo motion in the F-/STS is proposed to be decomposed into two smooth quasi-harmonic motions along the cutting and servo motion directions, which then constructs the quasi-elliptical trajectory. Taking advantage of the smooth nature of the two decomposed motions, the undesired tool vibrations induced by the motion non-smoothness in the F-/STS can be significantly eliminated, accordingly facilitating the generation of MLAs with homogeneous and smooth surfaces. Finally, the new concept is verified through numerical simulation of the tool motion and experimental demonstration by turning a typical hexagonal aspheric MLA.
Original languageEnglish
Pages (from-to)98-105
Number of pages8
JournalInternational Journal of Machine Tools and Manufacture
Volume122
DOIs
Publication statusPublished - 1 Nov 2017

Keywords

  • Micro-lens array
  • Quasi-elliptical trajectory
  • Slow tool servo
  • Tool vibration
  • Ultraprecision diamond turning

ASJC Scopus subject areas

  • Mechanical Engineering
  • Industrial and Manufacturing Engineering

Cite this