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차세대 초대형 위성 렌즈 개발용 금형 소재(STAVAX)의 초정밀 표면 절삭 특성에 관한 연구

A Study on the Characteristics of Ultra-Precision Surface Cutting of the Mold Material (STAVAX) for the Development of Large Satellite Lens

Journal of the Korean Society for Precision Engineering 2020;37(11):819-825.
Published online: November 1, 2020

1 한국기초과학지원연구원 연구장비운영부

2 충남대학교 분석과학기술대학원

3 충남대학교 기계공학부

4 한국기계연구원 나노공정연구실

5 아리조나대학교 광공학대학

1 Center for Analytical Instrumentation, Korea Basic Science Institute

2 Graduate School of Analytical Science and Technology, Chungnam National University

3 School of Mechanical Engineering, Chungnam National University

4 Department of Nano Manufacturing Technology, Korea Institute of Machinery and Materials

5 James C. Wyant College of Optical Sciences, The University of Arizona

#E-mail: kgh@kbis.re.kr, TEL: +82-42-865-3460
• Received: August 31, 2020   • Revised: September 28, 2020   • Accepted: October 5, 2020

Copyright © The Korean Society for Precision Engineering

This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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A Study on the Characteristics of Ultra-Precision Surface Cutting of the Mold Material (STAVAX) for the Development of Large Satellite Lens
J. Korean Soc. Precis. Eng.. 2020;37(11):819-825.   Published online November 1, 2020
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A Study on the Characteristics of Ultra-Precision Surface Cutting of the Mold Material (STAVAX) for the Development of Large Satellite Lens
J. Korean Soc. Precis. Eng.. 2020;37(11):819-825.   Published online November 1, 2020
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A Study on the Characteristics of Ultra-Precision Surface Cutting of the Mold Material (STAVAX) for the Development of Large Satellite Lens
Image Image Image Image Image Image Image Image Image Image Image Image Image Image
Fig. 1 Comparison of the light-collecting area of space telescopes capable of exoplanet transmission spectroscopy1 (Adapted from Ref. 1 on the basis of OA)
Fig. 2 Ultra-precision diamond turning machine (Nano-tech 450 UPL, Moore technology)
Fig. 3 White-light interferometer (From Taylor Hobson, CCI-optics)
Fig. 4 Diamond turning assistance ultrasonic-vibration
Fig. 5 Surface hardness versus RPM
Fig. 6 Surface roughness versus RPM
Fig. 7 Surface hardness versus feed rate
Fig. 8 Surface roughness versus feed rate
Fig. 9 Surface hardness versus depth of cut
Fig. 10 Surface roughness versus depth of cut
Fig. 11 Surface roughness versus spindle speed (CBN tool cutting condition)
Fig. 12 Surface roughness versus feed rate (CBN tool cutting condition)
Fig. 13 Surface roughness versus depth of cut (CBN tool cutting condition)
Fig. 14 Surface roughness versus hardness
A Study on the Characteristics of Ultra-Precision Surface Cutting of the Mold Material (STAVAX) for the Development of Large Satellite Lens

Experimental conditions

Parameters Cutting condition
Workpiece STAVAX
Spindle speed [RPM] 1000, 3000, 5000
Feed rate [μm/rev] 1, 3, 5
Depth of cut [μm] 1, 3, 5
Tool rake angle [deg]
Nose Radius [mm] 1.5
Cutting fluid Isopar H

Chemical compositions of STAVAX (Wt%)

C Si Mn Cr V Fe
0.38 0.90 0.50 13.60 0.30 84.32

Diamond turning assistance ultrasonic vibration

Variable Cutting condition
Feed [μm/rev] 2
Spindle speed [RPM] 25
Depth of cut [μm] 2
Amplitude [μm] ±1
Table 1 Experimental conditions
Table 2 Chemical compositions of STAVAX (Wt%)
Table 3 Diamond turning assistance ultrasonic vibration