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Vol. 35, No. 2
February, 2018
 
 
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  Journal of the Korean Society for Precision Engineering  
 
Aims and Scope
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…
Ethical Policy
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…
Editor-in-Chief: Sun-Kyu Lee
Vice Editor-in-Chief: Bo Hyun Kim
JKSPE Editorial Board
ISSN 1225-9071(Print)
ISSN 2287-8769(Online)
TEL +82-2-393-0724  /  FAX +82-2-518-2937  /   paper@kspe.or.kr  /  http://www.kspe.or.kr
 
 
 
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Vol. 35, No. 1, pp. 71-77
Title: Measurement of Auto-Focus Driving Distance for Mobile Phone Camera Lens Using a Confocal Displacement Sensor
Corresponding Author: Hagyong Kihm
Abstract: In mobile phone cameras, usually a voice coil motor (VCM) is used as a micro-positioning device for the image autofocus (AF) because of its low cost, simplicity, and reliability. Measuring the actual displacement of the VCM is important when we assemble the camera and test the AF performance for distant objects. In this paper, we propose using a confocal displacement sensor for calibrating the VCM displacement, where the axial chromatic aberration of a confocal objective lens is used to measure the target position. The tolerance angle for the dynamic tilt of a VCM increased up to ±15 o because of the large numerical aperture of the confocal objective lens, which increased the stability of the repeatable in-line inspection. We compared the measurement robustness of the confocal displacement sensor with that of the laser displacement sensor in a mass production line to verify its performance superiority. …
   
Vol. 35, No. 1, pp. 111-115
Title: Fabrication of Three-Dimensional Complex Shape PDMS Microstencil Using Air-Knife System and their Cell Culture Application
Corresponding Author: Gyu Man Kim
Abstract: In this study, we propose a fabrication method of three-dimensional complex shape polydimethylsiloxane microstencils. Three-dimensional complex shape polydimethylsiloxane (PDMS) microstencils were fabricated by an air-knife system and PDMS casting form preparing master mold by photolithography, diffuser lithography and polyurethane acrylate (PUA) replication. PDMS microstencils shape was a production of the hemispherical and quadrangular pyramid. When the prepolymer of PDMS was spin-coated onto the three-dimensional complex shape master mold, a thin layer of prepolymer remained on top of the master's structure and consequently prevented formation of perforated patterns. This residual layer was easily removed by the air-knife. The air-knife system was controlled by the flow rate of N2 gas and conveying speed of the master mold. Results revealed the fabricated three-dimensional complex shape PDMS microstencils, could be useful for application of three-dimensional cell culture device …
   
Vol. 35, No. 1, pp. 95-101
Title: Thermal Comparison of Conventional and Conformal Cooling Channel Designs for a Non-Constant Thickness Screw Cap
Corresponding Author: Eric Dimla
Abstract: Complex parts are manufactured with high production rates using plastic injection. Defects in injection moulded parts are typically caused by non-uniform cooling. The design of cooling channels is a key step in the mould tool design process. Laser sintering allows for the direct fabrication at reasonable price, complex 3D tools with integrated cooling channels without the need of fixtures. This technique allows the designer to optimise the position of cooling channels relative to the heat source. This paper presents a simulation study for a non-constant thickness threaded screw cap. Results comparing conventional to conformal cooling channel show that the range between the highest and the lowest part surface temperatures is reduced by 18.8%. On the other hand, there is only a decrease of 3.9% for the maximum temperature in the interior of the threaded screw cap. Conformal cooling using laser sintering in tool manufacturing achieves an improved heat transfer leading to a better part quality …
   
 
Current Issue Archive
    
    
JKSPE Vol. 35, No. 2
Software Technology Integrated Smart Machine Tool Development for Mold Machining
De-Yu Park1, Kyu-Yeong Yum1, Hyun-Yeong Cho2, Du-Jin Kim2, Jae-Keun Park3, Su-Jin Kim4

소프트웨어 기술을 융합한 금형가공용 스마트머신 개발
박대유1, 엄규용1, 조현용2, 김두진2, 박재근3, 김수진4

J. Korean Soc. Precis. Eng., Vol. 35,  No. 2  pp. 121-128, 2018.
http://doi.org/10.7736/KSPE.2018.35.2.121 
    Full text via DOI      PDF Links
 
Real-Time NURBS Curve Interpolator for 5-Axis CNC Machining
Sungchul Jee1

5축 CNC 가공을 위한 실시간 NURBS 곡선 보간기
지성철1

J. Korean Soc. Precis. Eng., Vol. 35,  No. 2  pp. 129-134, 2018.
http://doi.org/10.7736/KSPE.2018.35.2.129 
    Full text via DOI      PDF Links
 
Study on Preload Monitoring of Ball Screw Feed Drive System Using Natural Frequency Detection
Tung Lam Nguyen1,2, Seung-Kook Ro1,2, Chang Kyu Song1,2, Jong-Kweon Park1,2

고유진동수 검출을 이용한 볼스크류 이송계의 예압력 모니터링
뤼엔퉁람1,2, 노승국1,2, 송창규1,2, 박종권1,2

J. Korean Soc. Precis. Eng., Vol. 35,  No. 2  pp. 135-143, 2018.
http://doi.org/10.7736/KSPE.2018.35.2.135 
    Full text via DOI      PDF Links
 
Vision Based On-Machine Measurement of Flank Wear in Drill Tool for Smart Machine Tool
Tae-Gon Kim1, Kangwoo Shin1, Seok-Woo Lee1

스마트 공작기계를 위한 드릴 공구 여유면 마모의 기상 측정
김태곤1, 신강우1, 이석우1

J. Korean Soc. Precis. Eng., Vol. 35,  No. 2  pp. 145-149, 2018.
http://doi.org/10.7736/KSPE.2018.35.2.145 
    Full text via DOI      PDF Links
 
Development of Unified Interface for Multi-Vendors’ CNC Based on Machine State Model
Joo Sung Yoon1, Il Ha Park1, Jin Ho Sohn2, Hoen Jeong Kim3

공작기계 상태 모델 기반의 이기종 CNC 데이터 통합 인터페이스 개발
윤주성1, 박일하1, 손진호2, 김헌정3

J. Korean Soc. Precis. Eng., Vol. 35,  No. 2  pp. 151-156, 2018.
http://doi.org/10.7736/KSPE.2018.35.2.151 
    Full text via DOI      PDF Links
 
Analytical Study of Contact Stress on Wafer Edge in CMP
Jong Woo Lee1, Da Sol Lee1, Seon Ho Jeong1, Hyun Jin Kim1, Byeong Jun Park1, Hae Do Jeong1

CMP에서 웨이퍼 가장자리 접촉 응력에 대한 해석적 연구
이종우1, 이다솔1, 정선호1, 김현진1, 박병준1, 정해도1

J. Korean Soc. Precis. Eng., Vol. 35,  No. 2  pp. 157-161, 2018.
http://doi.org/10.7736/KSPE.2018.35.2.157 
    Full text via DOI      PDF Links
 
Feature-Based Analysis for Fault Diagnosis of Gas Turbine using Machine Learning and Genetic Algorithms
Byung Hyun Ahn1, Hyeon Tak Yu1, Byeong Keun Choi1

가스터빈 고장 진단을 위한 기계 학습과 유전 알고리즘을 이용한특징 분석
안병현1, 유현탁1, 최병근1

J. Korean Soc. Precis. Eng., Vol. 35,  No. 2  pp. 163-167, 2018.
http://doi.org/10.7736/KSPE.2018.35.2.163 
    Full text via DOI      PDF Links
 
Analysis of New Vacuum Caterpillar Structure Drive System for Solar Panel Cleaning Robot
Byuck Kyung Seong1, Seo Won Ok1, Dong Hwan Kim2

솔라 패널 청소 로봇을 위한 새로운 진공 캐터필러 구조의 구동시스템 해석
성벽경1, 옥서원1, 김동환2

J. Korean Soc. Precis. Eng., Vol. 35,  No. 2  pp. 169-177, 2018.
http://doi.org/10.7736/KSPE.2018.35.2.169 
    Full text via DOI      PDF Links
 
Improved Methodology To Assess Adaptability of Reconfigurable Manufacturing Systems (RMS) for Smaller Enterprises
Jong Man Park1

중소기업을 위한 RMS의 적합성 평가방법
박종만1

J. Korean Soc. Precis. Eng., Vol. 35,  No. 2  pp. 179-187, 2018.
http://doi.org/10.7736/KSPE.2018.35.2.179 
    Full text via DOI      PDF Links
 
Development of a Multi-Disk Type MR Fluid Brake with Modular Structure
Hyeong Rae Kim1, Soon-Geul Lee2, Jong Deok Park1, Hyung Kim1, Myeong Jin Choi2, Jae Kwan Ryu3

모듈러 구조의 멀티 디스크 타입 MR 유체 브레이크 개발
김형래1, 이순걸2, 박종덕1, 김 형1, 최명진2, 류재관3

J. Korean Soc. Precis. Eng., Vol. 35,  No. 2  pp. 189-196, 2018.
http://doi.org/10.7736/KSPE.2018.35.2.189 
    Full text via DOI      PDF Links
 
Fabrication of Superhydrophobic Surface on Various Metals Using Abrasive Blasting and Self-Assembled Monolayer Coating
Byungrak Park1, Woonbong Hwang1

연마가공과 자기조립단분자막 코팅 기반 다종 금속의 극소수성 표면제작기술
박병락1, 황운봉1

J. Korean Soc. Precis. Eng., Vol. 35,  No. 2  pp. 197-201, 2018.
http://doi.org/10.7736/KSPE.2018.35.2.197 
    Full text via DOI      PDF Links
 
Characteristics of Ankle Strategy Responses to Dynamic Tilting Perturbations
Hansol Seo1, Hohyun Jung2, Dukyoung Jung3, Dohyung Lim1

동적 기울임외란에 대한 발목전략 반응 특성
서한솔1, 정호현2, 정덕영3, 임도형1

J. Korean Soc. Precis. Eng., Vol. 35,  No. 2  pp. 203-210, 2018.
http://doi.org/10.7736/KSPE.2018.35.2.203 
    Full text via DOI      PDF Links
 
Investigation of Penetration Depth and Efficiency of Applied Heat Flux in a Directed Energy Deposition Process with Feeding of Ti-6Al-4V Wires
Bih Lii Chua1, Ho Jin Lee1, Dong Gyu Ahn1, Jae Gu Kim2

Ti-6Al-4V 와이어 공급형 직접 에너지 적층 공정에서의 적용 열원의침투 깊이 및 효율 고찰
빗리츄아1, 이호진1, 안동규1, 김재구2

J. Korean Soc. Precis. Eng., Vol. 35,  No. 2  pp. 211-217, 2018.
http://doi.org/10.7736/KSPE.2018.35.2.211 
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Study on Heat-Sealing Strength of the Pouch Film
Dong Soo Kim1,2, Sung Woo Bae1, Do Hyun Kim1, Jung Min Cho1, Min Sook Yu1,2

파우치 필름의 열융착강도 연구
"김동수1,2, 배성우1, 김도현1, 조정민1, 유민숙1,2

J. Korean Soc. Precis. Eng., Vol. 35,  No. 2  pp. 219-223, 2018.
http://doi.org/10.7736/KSPE.2018.35.2.219 
    Full text via DOI      PDF Links
 
 
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