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Vol. 35, No. 4
April, 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…
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. 3, pp. 341-347
Title: Thermal-Structural Coupled Numerical Analysis for Design of HighTemperature Extruder of FDM 3D Printers
Corresponding Author: Keun Park
Abstract: This study aims at developing a high temperature extruder for an FDM (Fused Deposition Modeling) type 3D printer that uses engineering thermoplastic filaments. An extruder is a key part of an FDM type printer, in which a filament moves to a heating block and is extruded through a nozzle with a specific diameter. For an appropriate extrusion, the filament should be heated above its softening temperature. Specifically, the filament should not be melted nor softened before it reaches the heating block for appropriate delivery. Hence, the extruder temperature should be carefully controlled to ensure its heating capability as well as its proper delivery. To meet these requirements, thermal-structural finite element (FE) analyses were performed for the prediction of the distributions of temperature and thermal stress. Various extruder designs were then considered to maximize the temperature difference between the nozzle and delivery parts, as well as to ensure structural safety. …
   
Vol. 35, No. 4, pp. 463-468
Title: Study on Structural Design of Archimedes Wind-Power Mill
Corresponding Author: Sanghu Park
Abstract: We have designed the structural shapes of a spiral blade and the frame to be used in an Archimedes wind-power system with the objective of increasing its mechanical strength. A conical roll-bending forming process was introduced to fabricate a metallic spiral blade, based on an incremental stepwise approach. From this process, the complicated spiral blade was constructed, and it could be applied to the wind-power mill. We proposed a few structural design concepts for improvement of the mechanical strength of the blade and frame. Fixing rods between the blades increased the natural frequency of the blades three-fold, compared to the original model with no rods. Also, the strength of the frame was increased by introducing edge-flanges with a height greater than 20 mm. This study will be helpful to industrial engineers interested in the structural design of a wind-power system in understanding the structural design process. …
   
 
Current Issue Archive
    
    
JKSPE Vol. 35, No. 4
Redefinition of the SI Base Units: Its Background and Principle
Ho Seong Lee1

SI 기본단위의 재정의: 그 배경과 원리
이호성1

J. Korean Soc. Precis. Eng., Vol. 35,  No. 4  pp. 365-373, 2018.
http://doi.org/10.7736/KSPE.2018.35.4.365 
    Full text via DOI      PDF Links
 
New Definition of the Kilogram by Fixing the Numerical Value of the Planck Constant
Dongmin Kim1, MyeongHyeon Kim1, Byung-Chill Woo1, Kwang-Cheol Lee1*

플랑크 상수를 이용한 킬로그램 재정의 및 실현
김동민1, 김명현1, 우병칠1, 이광철1

J. Korean Soc. Precis. Eng., Vol. 35,  No. 4  pp. 375-383, 2018.
http://doi.org/10.7736/KSPE.2018.35.4.375 
    Full text via DOI      PDF Links
 
Redefinition and Realization of ampere by Fixing the Numerical Value of the Elementary Charge e
Nam Kim1, Myung-Ho Bae1, Ye-Hwan Ahn1, Wan-Seop Kim1, Dong-Hun Chae1, Changki Hong2, Yunchul Chung2

상수 기본전하 e를 이용한 암페어 재정의 및 실현
김남1, 배명호1, 안예환1, 김완섭1, 채동훈1, 홍창기1, 정윤철2

J. Korean Soc. Precis. Eng., Vol. 35,  No. 4  pp. 385-397, 2018.
http://doi.org/10.7736/KSPE.2018.35.4.385 
    Full text via DOI      PDF Links
 
Redefinition of the Kelvin
Inseok Yang1

켈빈의 재정의
양인석1

J. Korean Soc. Precis. Eng., Vol. 35,  No. 4  pp. 399-404, 2018.
http://doi.org/10.7736/KSPE.2018.35.4.399 
    Full text via DOI      PDF Links
 
Mole, the SI Unit of Amount of Substance, and Its Re-Definition by Fixing the Numerical Value of the Avogadro Constant
Kyoung-Seok Lee1

물질의 양에 대한 SI 기본단위 몰과 아보가드로 상수를 이용한 재정의
이경석1

J. Korean Soc. Precis. Eng., Vol. 35,  No. 4  pp. 405-412, 2018.
http://doi.org/10.7736/KSPE.2018.35.4.405 
    Full text via DOI      PDF Links
 
GPS-Based Human Tracking Methods for Outdoor Robots
Woo Seok Lee1, In Ho Cho1, Jong Hwan Lim2

GPS 기반 옥외용 로봇의 인간 추종 방법
이우석1, 조인호1, 임종환2

J. Korean Soc. Precis. Eng., Vol. 35,  No. 4  pp. 413-420, 2018.
http://doi.org/10.7736/KSPE.2018.35.4.413 
    Full text via DOI      PDF Links
 
Chattering-Free Second Order Sliding Mode Based Finite-Time Control of a Robot Manipulator Considering Uncertainty and Disturbance
Yook Hyun Yoon1, Jae Min You1, Jahng Hyon Park1

모델 불확실성과 외란을 고려한 로봇 매니퓰레이터의 채터링이 없는 2차 슬라이딩 모드 기반 유한-시간 제어
윤육현1, 유재민1, 박장현1

J. Korean Soc. Precis. Eng., Vol. 35,  No. 4  pp. 421-426, 2018.
http://doi.org/10.7736/KSPE.2018.35.4.421 
    Full text via DOI      PDF Links
 
Shape Optimization of a Hydraulic Crane Boom
Jae Hyoung Lee1, Tae Hwa Song1, Jai Hak Lee2

크레인 붐의 형상 최적화
이재형1, 송태화1, 이재학2

J. Korean Soc. Precis. Eng., Vol. 35,  No. 4  pp. 427-432, 2018.
http://doi.org/10.7736/KSPE.2018.35.4.427 
    Full text via DOI      PDF Links
 
Development and Case Studies of a Function-Based Method for Geometric Tolerance Design
Ho Jae Ahn1, Hyunjune Yim2

기능기반 기하공차 설계 방법의 개발 및 사례 연구
안호재1, 임현준2

J. Korean Soc. Precis. Eng., Vol. 35,  No. 4  pp. 433-442, 2018.
http://doi.org/10.7736/KSPE.2018.35.4.433 
    Full text via DOI      PDF Links
 
Modeling of Displacements in a Large-Size Rotary Table Subjected to Loads
Hyeon-Il Oh1, Van-Canh Tong1, Woo-Sang Park2, Seong-Wook Hong1

하중을 받는 대형 로터리 테이블의 변위 모델링
오현일1, 통반칸1, 박우상2, 홍성욱1

J. Korean Soc. Precis. Eng., Vol. 35,  No. 4  pp. 443-450, 2018.
http://doi.org/10.7736/KSPE.2018.35.4.443 
    Full text via DOI      PDF Links
 
Development of Bending Lifetime Tester for Flexible OLEDs
Ji-Yeon Han1, Jae-Hyun Lee1

Flexible OLEDs용 Bending 수명 측정기 개발
한지연1, 이재현1

J. Korean Soc. Precis. Eng., Vol. 35,  No. 4  pp. 451-456, 2018.
http://doi.org/10.7736/KSPE.2018.35.4.451 
    Full text via DOI      PDF Links
 
Effect of Thiol Coating Time on the Morphology and Wettability of Copper Nanowires
Wonshik Kwak1, Kihwan Kim1, Hong Cho1, Woonbong Hwang1

티올 코팅 시간이 구리 나노와이어 형상 및 젖음성에 미치는 영향
곽원식1, 김기환1, 조한동1, 황운봉1

J. Korean Soc. Precis. Eng., Vol. 35,  No. 4  pp. 457-461, 2018.
http://doi.org/10.7736/KSPE.2018.35.4.457 
    Full text via DOI      PDF Links
 
Study on Structural Design of Archimedes Wind-Power Mill
Sanghu Park1, Sungmon Yang2, Hosung Ji3

아르키메데스 풍력발전기 강성설계에 관한 연구
박상후1, 양성문2, 지호성3

J. Korean Soc. Precis. Eng., Vol. 35,  No. 4  pp. 463-468, 2018.
http://doi.org/10.7736/KSPE.2018.35.4.463 
    Full text via DOI      PDF Links
 
 
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