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BPR 방법론 기반 중소 PCB 제조 기업의 맞춤형 제조실행시스템 구축
김건연(Gun Yeon Kim),이언(Eon Lee),김종환(Jong Hwan Kim),강형석(Hyung Suk Kang),노상도(Sang Do Noh),이재광(Jae Kwang Lee),최상수(Sang Su Choi),조용주(Jong Ju Cho),최석우(Seog Ou Choi) (사)한국CDE학회 2010 한국 CAD/CAM 학회 학술발표회 논문집 Vol.2010 No.1
Manufacturing enterprises have been doing their best endeavors to obtain global competitiveness using various methodologies, such as IT technology. In order to achieve global competitiveness, they are adopting Manufacturing Execution System (MES) for competitive production. MES is a total management system that manages from the beginning of the production by product order until the quality inspection of the finished product. And MES is an inter-mediator for supplementation of information gap between ERP and inspection machine and equipment. This paper describes on establishment of effective strategy based on BPR methodology and implementation of MES small and medium PCB manufacturing company with multiple-types of products and mixed process flows.
항공기 기체 가공용 5-Head Router Machine 구조물의 경량ㆍ고강성화 최적설계
최영휴(Young-Hyu Choi),차상민(Sang-Min Cha),하종식(Jong-Sick Ha),조용주(Yong-Ju Cho) 대한기계학회 2003 대한기계학회 춘추학술대회 Vol.2003 No.11
In this paper, a multi-step optimization using a G.A.(Genetic Algorithm) with variable penalty function is introduced to the structural design optimization of a 5-head route machine. In the first stage of the design optimization, cross-section shapes of the structural members are optimized. The following two stages are static and dynamic design optimization stages. In the static optimization stage, the static compliance and weight of the structure are minimized simultaneously under some dimensional constraints and deflection limits. On the other hand, the dynamic compliance and the weight of the machine structure are minimized simultaneously in the dynamic design optimization stage. The proposed design optimization method was successfully applied to the 5-head router machine design optimization. As the results, static and dynamic compliances of the 5-heas router machine have decreased by 5.3% and 43.6% respectively compared with the initial design, while the weight of the structure also has decreased by 6.6%..
라우터머신용 랙 피니언 방식 이송시스템의 / 진동해석 및 동적설계 최적화
최영휴(Young-Hyu Choi),최응영(Eung-Young Choi),장성현(Sung-Hyun Jang),하종식(Jong-Sik Ha),조용주(Yong-Ju Cho) 대한기계학회 2005 대한기계학회 춘추학술대회 Vol.2005 No.5
In order to prevent a router machine feed drive system from transient operational vibration, this paper presents vibration analysis and dynamic design optimization of a rack and pinion typed feed drive system for a router machine. The feed drive system was mathematically idealized as a 5-degree-of-freedom lumped parameter model. Stiffness parameters of motor-shaft, rack and pinion gears, and machine structure were appropriately considered in the modeling. Computational experiment was carried out to obtain vibrations of the feed drive system during its transient speed operation. Furthermore, optimum design parameters were successfully obtained by using a Genetic Algorithm based design optimization method.
5-Head Router Machine 구조물의 진동최소화를 위한 동적설계 최적화
최영휴(Young-Hyu Choi),장성현(Sung-Hyun Jang),최응영(Eung-Young Choi),하종식(Jong-Sik Ha),조용주(Yong-Ju Cho) 대한기계학회 2005 대한기계학회 춘추학술대회 Vol.2005 No.5
This paper presents a multi-step design optimization for 5-head router machine using a genetic algorithm. The design problem is to find out the optimum configuration and thickness of structural members which minimize vibrations, the static compliance, dynamic compliance and weights of the machine structure simultaneously under several constraints such as dimensional constraints, maximum deflection limit, safety criterion and maximum vibration amplitude limit. Optimization results showed a great reduction in compliance and vibration amplitude at the spindle nose of the router machine without increase of machine weight.