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Vol. 35, No. 5
May, 2018
 
 
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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…
Editor-in-Chief: Sun-Kyu Lee
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ISSN 1225-9071(Print)
ISSN 2287-8769(Online)
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Vol. 35, No. 5, pp. 551-559
Title: The Effects of Grid Shape on Flexibility and Durability of Flexible Transparent Metal Grid Films
Corresponding Author: Oh Young Kwon
Abstract: Recently, the metal grid electrode drew attention as a flexible transparent conductive electrode for touch screen panels. In metal grid electrodes, various shapes of grid patterns were used to avoid the moire phenomenon. In this study, we investigated the effects of the metal grid shapes - such as the honeycomb, diamond, and square - on the flexibility and durability of the metal grid film using an experimental and numerical analysis. The flexibility of the metal grid film was evaluated via the following: bending, cyclic bending fatigue and stretching tests; it was compared with the numerical stress analysis. In the bending test, the resistance of the honeycomb grid sample increased by 10% at a bending radius of 10 mm. On the other hand, the diamond grid showed almost no change in resistance up to a bending radius of 6 mm. When the substrate was stretched to 5%, many cracks appeared on the surface of the honeycomb pattern sample. On the other hand, no cracks were found in the diamond pattern sample. Therefore, the diamond pattern exhibited superior flexibility and durability to the honeycomb pattern. The numerical stress analysis also showed that the honeycomb pattern had the highest stress and the diamond pattern had the lowest stress during bending and stretching, which corresponded with the experimental results. …
   
Vol. 35, No. 5, pp. 537-543
Title: Estimation of Kinematics and Loop Stiffness for Multi-Axis Machine Tool
Corresponding Author: Sungcheul Lee
Abstract: Various types of 5-axis machine tools have been developed. In the case of a machine tool composed from linear motion, the kinematic equation can be obtained easily and intuitively. However, machine tools with more than four axes, including rotating axes, have generally performed kinematic and dynamic performance analyses using mathematical methods. In this paper, the kinematic equations of various types of machine tools are obtained, based on the Homogeneous Transformation Matrix method. The loop stiffness was then calculated as a mathematical model. A mathematical model of loop stiffness was verified by using a method to calculate the loop stiffness of a commercial program. The results of the mathematical model showed less than a 1% error with the commercial program, and this could show the validity of the mathematical model. Then, this model was applied to two types of machine tools. The minimum loop stiffness of both models is compared. …
   
 
Current Issue Archive
    
    
JKSPE Vol. 35, No. 5
A Study on the Gear Tooth Micro-Geometry Optimization of Angle Drive Unit
Min Hyong Jeon1, Namsul Jeon2, Lae Sung Kim3, Sung Hyun Cho1, Sung Ki Lyu1

각도 구동장치 기어치형의 마이크로 지오메트리 최적화에 관한 연구
전민형1, 전남술2, 김래성3, 조성현1, 류성기1

J. Korean Soc. Precis. Eng., Vol. 35,  No. 5  pp. 473-478, 2018.
http://doi.org/10.7736/KSPE.2018.35.5.473 
    Full text via DOI      PDF Links
 
Thermal-Fluid Coupled Analysis of the Nozzle Part for the FDM 3D Printers Considering Flow Characteristics of Cooling Fan
Chang-Whan Lee1,, Hyun-Woo Kim1, Jea-Hyeong Yu1, Keun Park1

냉각 팬의 유동 특성을 고려한 압출적층형 3차원 프린터 노즐부의 열-유동 연계 해석
이창환1, 김현우1, 유제형1, 박 근1

J. Korean Soc. Precis. Eng., Vol. 35,  No. 5  pp. 479-484, 2018.
http://doi.org/10.7736/KSPE.2018.35.5.479 
    Full text via DOI      PDF Links
 
Study on the Pool Boiling Heat Transfer Characteristics of Aluminum Plate with Directional Surface Roughness
Jun Kim1, Dong In Hong1, Seok Min Kim 1,2

알루미늄 평판 내 방향성 거칠기의 비등 열전달 특성에 대한 연구
김준1, 홍동인1, 김석민1,2

J. Korean Soc. Precis. Eng., Vol. 35,  No. 5  pp. 485-491, 2018.
http://doi.org/10.7736/KSPE.2018.35.5.485 
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An Investigation into the Effect of Ultrasonic Vibration on Drawing Force
Hye Kyung Jung1, Jae Kyu Park1, Hee Cheol Kim1, Jong-Bong Kim2

초음파 진동이 인발력에 미치는 영향 분석
정혜경1, 박재규1, 김희철1, 김종봉2

J. Korean Soc. Precis. Eng., Vol. 35,  No. 5  pp. 493-498, 2018.
http://doi.org/10.7736/KSPE.2018.35.5.493 
    Full text via DOI      PDF Links
 
Evaluation of Driving Performance of Wheel Loader in the Framework of Fitts’ Law
Jang Woo Park1, Shinsuk Park1

휠로더 주행 성능의 객관적 평가 방법: 피츠의 법칙의 적용
박장우1, 박신석1

J. Korean Soc. Precis. Eng., Vol. 35,  No. 5  pp. 499-506, 2018.
http://doi.org/10.7736/KSPE.2018.35.5.499 
    Full text via DOI      PDF Links
 
Recognition of Driving and Parking Lines for Intelligent Vehicles Using Bird Eye View System
Hyun Soo Bae1, Suk Gyu Lee1

Bird Eye View 시스템을 이용한 지능형 자동차의 주행차선 및 주차선인식
배현수1, 이석규1

J. Korean Soc. Precis. Eng., Vol. 35,  No. 5  pp. 507-514, 2018.
http://doi.org/10.7736/KSPE.2018.35.5.507 
    Full text via DOI      PDF Links
 
Fatigue Life Prediction with Equivalent von Mises Stress Considering the Phase Difference between Multi-Axial Stress Components
Moonyoung Yoon1, Kyeongho Kim1, Kwangsuck Boo2, Heungseob Kim2

다축응력 성분간의 위상차를 고려한 등가본미세스응력을 이용한피로수명예측
윤문영1, 김경호1, 부광석2, 김흥섭2

J. Korean Soc. Precis. Eng., Vol. 35,  No. 5  pp. 515-520, 2018.
http://doi.org/10.7736/KSPE.2018.35.5.515 
    Full text via DOI      PDF Links
 
Effect of Protection Design Parameters on Mine Blast Impact Characteristics
Chanyoung Park1, Chongdu Cho2

지뢰방호구조 설계인자가 지뢰폭압충격 특성에 미치는 효과
박찬영1, 조종두2

J. Korean Soc. Precis. Eng., Vol. 35,  No. 5  pp. 521-529, 2018.
http://doi.org/10.7736/KSPE.2018.35.5.521 
    Full text via DOI      PDF Links
 
Performance Estimation of Adjustable Wall Blower according to the Entering Distance of Nozzle
Ilkwang Jang1, Jae Ho Paek1, Yong Hoon Jang1

인입 거리에 따른 가변형 월 블로워의 성능 평가
장일광1, 백재호1, 장용훈1

J. Korean Soc. Precis. Eng., Vol. 35,  No. 5  pp. 531-536, 2018.
http://doi.org/10.7736/KSPE.2018.35.5.531 
    Full text via DOI      PDF Links
 
Estimation of Kinematics and Loop Stiffness for Multi-Axis Machine Tool
Sungcheul Lee1,, Jooho Hwang1, Chun-Hong Park2

다축 공작기계의 기구학 및 루프강성 해석
이성철1, 황주호1, 박천홍2

J. Korean Soc. Precis. Eng., Vol. 35,  No. 5  pp. 537-543, 2018.
http://doi.org/10.7736/KSPE.2018.35.5.537 
    Full text via DOI      PDF Links
 
Improvement of Synthesis Process for High Aspect Ratio Copper Nanowires via EDA-Mediated Method
Duong Thanh Hung1 Hyun Chul Kim1

EDA 매개법을 이용한 고세장비 구리나노와이어 합성법의 개선
Duong Thanh Hung1, 김현철1

J. Korean Soc. Precis. Eng., Vol. 35,  No. 5  pp. 545-550, 2018.
http://doi.org/10.7736/KSPE.2018.35.5.545 
    Full text via DOI      PDF Links
 
The Effects of Grid Shape on Flexibility and Durability of Flexible Transparent Metal Grid Films
Oh Young Kwon1, Yo Sep Lee1, Won Jae Lee1, Young Moon Jang1, Sung-Hoon Choa2

메탈 그리드 유연 투명 전극의 그리드 형태에 따른 유연 신뢰성 연구
권오영1, 이요셉1, 이원재1, 장영문1, 좌성훈2

J. Korean Soc. Precis. Eng., Vol. 35,  No. 5  pp. 551-559, 2018.
http://doi.org/10.7736/KSPE.2018.35.5.551 
    Full text via DOI      PDF Links
 
Fabrication of Superoleophobic Surface on Zinc Substrate Using Anodization and Self-Assembled Monolayer Coating
Wonshik Kwak1, Woonbong Hwang1

양극산화와 자기 조립 단분자막 코팅 공법을 이용한 아연 기반의 극소유성 표면 제작기술
곽원식1, 황운봉1

J. Korean Soc. Precis. Eng., Vol. 35,  No. 5  pp. 561-565, 2018.
http://doi.org/10.7736/KSPE.2018.35.5.561 
    Full text via DOI      PDF Links
 
 
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