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Vol. 35, No. 6
June, 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. 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. 6
A Study on the Design of Rear Wheel Drive Reducer for Electric Vehicle
Myeong Ho Kim1,2, Zhen Qin1, Ki Hun Lee1, Qi Zhang3, Sung Ki Lyu1

후륜구동 전기차량용 감속기 설계에 관한 연구
김명호1,2, 진 진1, 이기훈1, 장 기3, 류성기1

J. Korean Soc. Precis. Eng., Vol. 35,  No. 6  pp. 571-577, 2018.
http://doi.org/10.7736/KSPE.2018.35.6.571 
    Full text via DOI      PDF Links
 
Improvement of In-Mold Type PAB Door Sink Marks Using Mucell Process
Cheon-Soo Park1, Dong-Won Jung2

뮤셀공법을 이용한 In-Mold Type PAB Door 싱크마크 개선
박천수1, 정동원2

J. Korean Soc. Precis. Eng., Vol. 35,  No. 6  pp. 579-584, 2018.
http://doi.org/10.7736/KSPE.2018.35.6.579 
    Full text via DOI      PDF Links
 
A Study on the Foundation Design of Large Machining Center for Highly Precision
Seonghwa Cho1, Changwoo Lee2

초정밀 대형 머시닝센터의 바닥 지반 설계에 관한 연구
조성화1, 이창우2

J. Korean Soc. Precis. Eng., Vol. 35,  No. 6  pp. 585-589, 2018.
http://doi.org/10.7736/KSPE.2018.35.6.585 
    Full text via DOI      PDF Links
 
An Experimental Study on the Dynamic Response for an Operating Rotor System under the Sinusoidal Exciting Force
Chae Sil Kim1, Jae Hoon Lee1

조화가진력을 받고 있는 작동 상태 회전체의 동적 응답에 관한 실험적 연구
김재실1, 이재훈1

J. Korean Soc. Precis. Eng., Vol. 35,  No. 6  pp. 591-596, 2018.
http://doi.org/10.7736/KSPE.2018.35.6.591 
    Full text via DOI      PDF Links
 
A Study on the Machining Characteristics of a Turning-Center by Laser Assisted Machining
Choon-Man Lee1, Eun Jung Kim1

레이저보조가공에 의한 터닝센터가공 특성에 관한 연구
이춘만1, 김은중1

J. Korean Soc. Precis. Eng., Vol. 35,  No. 6  pp. 597-601, 2018.
http://doi.org/10.7736/KSPE.2018.35.6.597 
    Full text via DOI      PDF Links
 
A Study on the Effect of Gas Flow Rate and Power in Plasma Assisted Machining
Choon-Man Lee1, Young Hun Lee1

플라즈마 보조가공에서 가스 유량 및 출력의 영향분석
이춘만1, 이영훈1

J. Korean Soc. Precis. Eng., Vol. 35,  No. 6  pp. 603-608, 2018.
http://doi.org/10.7736/KSPE.2018.35.6.603 
    Full text via DOI      PDF Links
 
Study on Finite Element Modeling Method for Cylindrical Composite Lattice Structures with Hexagonal Cell
Jae Moon Im1, Kwang Bok Shin2, and Sang Woo Lee3

육각 격자구조를 갖는 원통형 복합재 격자 구조물의 유한요소 모델링 기법 연구
임재문1, 신광복2, 이상우3

J. Korean Soc. Precis. Eng., Vol. 35,  No. 6  pp. 609-613, 2018.
http://doi.org/10.7736/KSPE.2018.35.6.609 
    Full text via DOI      PDF Links
 
Block Shear Strength Estimation of STS304L Stainless Steel Fillet-Welded Connection with Base Metal Fracture
Hoo Chang Lee1, Bo Kyung Hwang1, and Tae Soo Kim2

"오스테나이트계 스테인리스강(STS304L) 필릿 용접접합부의 모재 블
이후창1, 황보경1, 김태수2

J. Korean Soc. Precis. Eng., Vol. 35,  No. 6  pp. 615-621, 2018.
http://doi.org/10.7736/KSPE.2018.35.6.615 
    Full text via DOI      PDF Links
 
Interim Check and Compensation of Geometric Errors to Improve Volumetric Error of Machine Tools
Seung-Han Yang1, Hoon-Hee Lee1, and Kwang-Il Lee2

공작기계의 체적오차 향상을 위한 주기적 검사 및 기하학적 오차 보정
양승한1, 이훈희1, 이광일2

J. Korean Soc. Precis. Eng., Vol. 35,  No. 6  pp. 623-627, 2018.
http://doi.org/10.7736/KSPE.2018.35.6.623 
    Full text via DOI      PDF Links
 
A Study of Droplet Transmissivity Change by Characteristic of Mesh
Jinyoung Park1 and Woonbong Hwang1

메쉬 특성에 따른 물방울 투과도 변화에 대한 연구
박진영1, 황운봉1

J. Korean Soc. Precis. Eng., Vol. 35,  No. 6  pp. 629-633, 2018.
http://doi.org/10.7736/KSPE.2018.35.6.629 
    Full text via DOI      PDF Links
 
Effects of the Liquid Surface Tension on the Ejected Droplet Volume in a Pneumatic Printing System
Sangmin Lee1, In Ho Choi2, and Joonwon Kim3

공압 프린팅 시스템에서 용액의 표면 장력이 토출 액적에 미치는 영향
이상민1, 최인호2, 김준원3

J. Korean Soc. Precis. Eng., Vol. 35,  No. 6  pp. 635-639, 2018.
http://doi.org/10.7736/KSPE.2018.35.6.635 
    Full text via DOI      PDF Links
 
Analysis of Underfill Process on Micro-Pitch Flip-Chip by Epoxy Filling Rate
Ki Beom Ham1, Jungo Son2, Hyun-Ja Im3, and Yong-Jai Park1

"에폭시 충전 비율에 따른 미세피치급 플립칩의 언더필 공정 해석에
함기범1, 손정오2, 임현자3, 박용재1

J. Korean Soc. Precis. Eng., Vol. 35,  No. 6  pp. 641-647, 2018.
http://doi.org/10.7736/KSPE.2018.35.6.641 
    Full text via DOI      PDF Links
 
 
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