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Open AccessArticle

Suppression of Surface Waviness Error of Fresnel Micro-Structured Mold by Using Non-Integer Rotation Speed Ratio in Parallel Grinding Process

1
Center for Precision Engineering, School of Mechatronics Engineering, Harbin Institute of Technology, Harbin 150001, China
2
Intelligent Manufacturing Institute, Hunan University of Science and Technology, Xiangtan 411201, China
3
Ultraprecision Machining Center, Zhejiang University of Technology, Hangzhou 310014, China
*
Author to whom correspondence should be addressed.
Micromachines 2020, 11(7), 652; https://doi.org/10.3390/mi11070652
Received: 28 May 2020 / Revised: 27 June 2020 / Accepted: 29 June 2020 / Published: 30 June 2020
(This article belongs to the Special Issue Ultra Precision Technologies for Micromachining)
Fresnel micro-structured lenses are widely used in the field of modern optoelectronic technology. High-precision Fresnel micro-structured mold is the key technology to achieve its large-scale replication production. Focusing on the surface waviness error of Fresnel micro-structured mold machined by parallel grinding process, this paper conducted theoretical modeling and experiment research. Based on the grinding kinematics theory, the simulation models of the surface waviness topography and the circular waviness profiles of the ground Fresnel micro-structured mold were developed, considering the combined influence of the non-integer rotation speed ratio and other grinding parameters. A series of grinding experiments were carried out to verify the proposed simulation models. The influence of a non-integer rotation speed ratio and a wave-shift value upon the surface waviness error of the ground Fresnel micro-structured molds were analyzed. Both the simulation and experimental results proved that choosing the non-integer rotation speed ratio and a proper wave-shift value could greatly reduce the surface waviness error and improve the surface quality and uniformity. View Full-Text
Keywords: Fresnel micro-structured mold; surface waviness error; parallel grinding; non-integer rotation speed ratio; wave-shift value Fresnel micro-structured mold; surface waviness error; parallel grinding; non-integer rotation speed ratio; wave-shift value
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MDPI and ACS Style

Pan, Y.; Zhao, Q.; Guo, B.; Chen, B.; Wang, J. Suppression of Surface Waviness Error of Fresnel Micro-Structured Mold by Using Non-Integer Rotation Speed Ratio in Parallel Grinding Process. Micromachines 2020, 11, 652.

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