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Vol. 34, No. 4
April, 2017
 
 
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  Journal of the Korean Society for Precision Engineering  
 
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Journal of the Korean Society for Precision Engineering (JKSPE) is devoted to publishing original research articles with high ethical standard on all aspects of precision…
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Code of Ethics for Academic Activities of the Korean Society for Precision Engineering (KSPE) Enacted on October 9, 2008 Chapter 1: Overall Rules Article 1: Purpose…
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ISSN 2287-8769(Online)
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Vol. 34, No. 4, pp. 237-241
Title: Study on Characteristics of Cryogenic Machining Process of Titanium Alloy at a Low Cutting Speed
Corresponding Author: Do Young Kim
Abstract: Cryogenic machining uses liquid nitrogen (LN2) as a coolant. This machining process can reduce the cutting temperature and increase tool life. Titanium alloys have been widely used in the aerospace and automobile industries because of their high strength-to-weight ratio. However, they are difficult to machine because of their poor thermal properties, which reduce tool life. In this study, we applied cryogenic machining to titanium alloys. Orthogonal cutting experiments were performed at a low cutting speed (1.2 - 2.1 m/min) in three cooling conditions: dry, cryogenic, and cryogenic plus heat. Cutting force and friction coefficients were observed to evaluate the machining characteristics for each cooling condition. For the cryogenic condition, cutting force and friction coefficients increased, but decreased for the cryogenic plus heat condition. …
   
Vol. 34, No. 4, pp. 259-264
Title: Optimal Dispersion Condition to Distinguish OPD Directions of Spectrally-Resolved Interferometry
Corresponding Author: Young Ho Yun
Abstract: Spectrally resolved interferometry (SRI) is an attractive technique to measure absolute distances without any moving components. In the spectral interferogram obtained by a spectrometer, the optical path difference (OPD) can simply be extracted from the linear slope of the spectral phase. However, SRI has a fundamental measuring range limitation due to maximum and minimum measurable distances. In addition, SRI cannot distinguish the OPD direction because the spectral interferogram is in the form of a natural sinusoidal function. In this investigation, we describe a direction determining SRI and propose the optimal conditions for determining OPD direction. Spectral phase nonlinearity, caused by a dispersive material, effects OPD direction but deteriorates spectral interferogram visibility. In the experiment, various phase nonlinearities were measured by adjusting the dispersive material (BK7) thickness. We observed the interferogram visibility and the possibility of direction determination. Based on the experimental results, the optimal dispersion conditions are provided to distinguish OPD directions of SRI.…
   
 
Current Issue Archive
    
    
JKSPE Vol. 34, No. 4
Study on Characteristics of Cryogenic Machining Process of Titanium Alloy at a Low Cutting Speed
Do Young Kim1, Dong Min Kim1, and Hyung Wook Park1

티타늄 합금 소재 저속 영역 극저온 가공 특성 연구
김도영1, 김동민1, 박형욱1

J. Korean Soc. Precis. Eng., Vol. 34,  No. 4  pp. 237-241, 2017.
http://dx.doi.org/10.7736/KSPE.2017.34.4.237 
    Full text via DOI      PDF Links
 
End Effectors and Flexible Fixtures for Rapidly Holding Freeform-Surface CFRP Workpieces
Younghoon Son1, Minh Duc Do1, and Hae-Jin Choi1

자유곡면 CFRP 판형 가공물 신속고정용 유연지그 및 엔드 이펙터
손영훈1, 도민득1, 최해진1

J. Korean Soc. Precis. Eng., Vol. 34,  No. 4  pp. 243-246, 2017.
http://dx.doi.org/10.7736/KSPE.2017.34.4.243 
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Improvement of the Quality of Cryogenic Machining by Stabilization of Liquid Nitrogen Jet Pressure
Myeong Gu Gang1, Byung-Kwon Min1, Tae-Gon Kim2, and Seok-Woo Lee2

액체질소 분사 안정화를 통한 극저온가공 품질 향상
강명구1, 민병권1, 김태곤2, 이석우2

J. Korean Soc. Precis. Eng., Vol. 34,  No. 4  pp. 247-251, 2017.
http://dx.doi.org/10.7736/KSPE.2017.34.4.247 
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Numerical Analysis of Thermal Characteristics of a Milling Process of Titanium Alloy Using Nanofluid Minimum-Quantity Lubrication
Young Chang Kim1, Jin Woo Kim1, Jung Sub Kim1, and Sang Won Lee2

티타늄 합금의 나노유체 극미량 윤활 밀링 공정 열특성에 관한 수치해석 연구
김영창1, 김진우1, 김정섭1, 이상원2

J. Korean Soc. Precis. Eng., Vol. 34,  No. 4  pp. 253-258, 2017.
http://dx.doi.org/10.7736/KSPE.2017.34.4.253 
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Optimal Dispersion Condition to Distinguish OPD Directions of Spectrally-Resolved Interferometry
Young Ho Yun1, Dae Hee Kim1, and Ki-Nam Joo1

방향 판별 분산간섭계의 최적 분산 조건 연구
윤영호1, 김대희1, 주기남1

J. Korean Soc. Precis. Eng., Vol. 34,  No. 4  pp. 259-264, 2017.
http://dx.doi.org/10.7736/KSPE.2017.34.4.259 
    Full text via DOI      PDF Links
 
The Development of Velocity Ripple Controller Using Active Phase Compensation
Seok Il Kang1, Jae Hyeon Jeong1, and Jung Han Kim1

능동형 위상보정을 이용한 정밀 속도리플 제어기의 개발
강석일1, 정재현1, 김정한1

J. Korean Soc. Precis. Eng., Vol. 34,  No. 4  pp. 265-272, 2017.
http://dx.doi.org/10.7736/KSPE.2017.34.4.265 
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New Stress-Strain Model for Identifying Plastic Deformation Behavior of Sheet Materials
Young Suk Kim1, Quoc Tuan Pham2, and Chan Il Kim3

판재의 소성변형 거동을 동정하기 위한 새로운 응력-변형률 모델
김영석1, 팜콕트완2, 김찬일3

J. Korean Soc. Precis. Eng., Vol. 34,  No. 4  pp. 273-279, 2017.
http://dx.doi.org/10.7736/KSPE.2017.34.4.273 
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Development of the Coil Spring Design Program for Spring Operating Mechanism
Min Soo Kim1, Chul Woong Jun1, and Jeong Hyun Sohn2

스프링조작기 개발을 위한 코일 스프링 설계 프로그램 개발
김민수1, 전철웅1, 손정현2

J. Korean Soc. Precis. Eng., Vol. 34,  No. 4  pp. 281-285, 2017.
http://dx.doi.org/10.7736/KSPE.2017.34.4.281 
    Full text via DOI      PDF Links
 
The Noise Reduction Effect by the Enclosure of Gas Turbines
Dae Hun Park1, Yoo In Shin2, Sung Gyu Park1, Kang Il Kim3, and Chul Ki Song2,4

가스터빈 차폐막의 소음 저감효과에 관한 연구
박대훈1, 신유인2, 박성규1, 김강일3, 송철기2,4

J. Korean Soc. Precis. Eng., Vol. 34,  No. 4  pp. 287-292, 2017.
http://dx.doi.org/10.7736/KSPE.2017.34.4.287 
    Full text via DOI      PDF Links
 
A Study on Development of Three-Dimensional Chocolate Printer
Kyu Eon Kim1, Keun Park2, and Chibum Lee2

초콜릿 소재의 3차원 프린터 개발에 관한 연구
김규언1, 박 근2, 이치범2

J. Korean Soc. Precis. Eng., Vol. 34,  No. 4  pp. 293-298, 2017.
http://dx.doi.org/10.7736/KSPE.2017.34.4.293 
    Full text via DOI      PDF Links
 
 
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