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자동화된 NC 파트 프로그래밍을 위한 공구 관리 시스템 개발
이지은(Ji-Eun Yi),김동환(Dong-Hwan Kim),이승호(Seungho Lee),조성훈(Sung-Hoon Cho),현용탁(Yong Tak Hyun) 대한기계학회 2013 대한기계학회 춘추학술대회 Vol.2013 No.12
In order to maintain the competitiveness of the manufacturing industry, it is of great importance to automate every stages of the production process as much as possible. Concerning the machining process, the part programming can be largely automated by an efficient cutting tool management system. This study summarizes the result of the development of a cutting tool management system, which is designed to meet the needs for user-friendliness, compatibility, and maintenance. The system is developed based on the object-oriented data structure and provides an intuitive Human Machine Interface running on the Windows-based PC. Even novice NC machine operators can easily apply the system for their usual machining jobs, thanks to the functions enabling the automated recommendation of cutting tools and parameters. User-friendliness is much more enhanced by using several functions such as the search of book-marked tools, the import of experience-based cutting parameters, and a tool turret management function. The system developed can significantly contribute to increase the user-friendliness and the automation of the NC programming and consequently the quality and productivity of the machining process.
현용탁,좌종근 제주대학교 공과대학 첨단기술연구소 2001 尖端技術硏究所論文集 Vol.12 No.2
The saturated winding inductances of a transformer are determined using the instantaneous magnetic saturation curve. The instantaneous curve is obtained from no load saturation in rms form by a direct piecewise linearized approach, then it is represented by a four-term ploynominal approximation. The saturated differential, effective and apparent winding inductances are computed from this curve, and these inductance are compared with the measured magnetizing inductance. The results show that the relation of L_d<L_e<L_a exists and the computed apparent inductance is more close to the measured inductance.