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금형면 자동 다듬질 전문가 시스템 개발에 관한 연구-Ⅱ : 통합 연마 파라미터를 사용한 최적 가공 구현 및 전문가 시스템 구축
민헌식,이성환,안유민,조남규,한창수 한국공작기계학회 2002 한국생산제조학회지 Vol.11 No.1
To reduce the cost and increase reliability of die and mold products, automation of the finishing (polishing) process is essential. A major element of automation is a reliable database and a knowledge base for polishing status. This paper presents a polishing expert system which can determine optimal polishing sequences and conditions by using an empirical formula and an experimental database. The simplex method was used for the cure fittings of the experimental results. Also a graphical user interface, which visualizes the optimized results, was developed.
금형면 자동 다듬질 전문가 시스템 개발에 관한 연구-Ⅰ : DB 구축을 위한 회전 및 진동 연마 가공의 실험적 연구
민헌식,이성환,안유민,조남규,한창수 한국공작기계학회 2002 한국생산제조학회지 Vol.11 No.1
In manufacturing die and mold, polishing is important as it takes as mush as 50% of the production cost. In this research, an attachable type polishing device to a CNC machining center was developed. Experiments were done with a specially designed rotation type polishing device. Also an ultra-sonic (Vibration type) waving device was introduced to acquire finer surface finishes. From the constructed data base based on the experimental results, it is shown that optimal polishing conditions are generated by the combined use of the rotation type tool and the vibration type tool.
민헌식,이성환,안선응 한국공작기계학회 2002 한국생산제조학회지 Vol.11 No.3
As laser cutting process is widely used in industry, an automated on-line process control system has become very important. In this paper, development of a laser cutting monitoring system, which is regarded as the fundamental step toward automation of the process, is presented. Acoustic emission and an artificial neural network were used for the monitoring system. With given process parameters including laser power and scanning speed, the system can predict the suitability of laser beam for the cutting of a stainless steel (STS304) plate.
민헌식,이성환 한국공작기계학회 2002 한국생산제조학회지 Vol.11 No.3
Though the laser cutting process is increasingly used in industry, a process automation and systematic database is still yet to be developed. In this study, as the fundamental step toward the construction of a reliable process expert system, a laser cutting quality monitoring/analysis system is developed based on simulation and experimental results. The relations between laser process parameters and laser cutting surface quality parameters such as kerf geometry, striation, surface roughness and dross formation are characterized and analyzed. A graphical user interface is used to visualize the results.
민헌식(Min Huen Sick),황인덕(Hwang In Duk),박대성(Park Dae Sung),유환조(Yoo Hwan Jo) 대한기계학회 2009 대한기계학회 춘추학술대회 Vol.2009 No.11
Recently, automotive companies have tried to replace metals with plastic materials in order to reduce weight and cost together with an increasing demand for quality, comfort and security. Front end modules are on the way to becoming an automotive standard nowadays. In this trends, the goal of the project on GMT FEM CARRIER is to redesign the front end module of the car using new materials, GMT(Glass Mat Reinforced Thermoplastics) by flow molding process. In this study, we obtain the light weight technology of FEM carrier and 2.2㎏/Veh.(25%) of weight