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최영휴(Y. H. Choi),장성현(S. H. Jang),김인수(I. S. Kim),오창환(C. H. Oh),조용주(Y. J. Cho) 한국생산제조학회 2006 한국생산제조시스템학회 학술발표대회 논문집 Vol.2006 No.5
In this paper, dynamic analysis a spindle system for 5-axis multi-tasking machine by using ADROS, which is our own developed S/W for dynamic design analysis of rotor systems. As the result, the critical speed of our spindle system for 5-axis multi-tasking machine is above twice of the operating speed.
최영휴(Y. H. Choi),장성현(S. H. Jang),김인수(I. S. Kim),오창환(C. H. Oh),조용주(Y. J. Cho) 한국생산제조학회 2006 한국공작기계학회 춘계학술대회논문집 Vol.2006 No.-
In this paper, dynamic analysis a spindle system for 5-axis multi-tasking machine by using ADROS, which is our own developed S/W for dynamic design analysis of rotor systems. As the result, the critical speed of our spindle system for 5-axis multi-tasking machine is above twice of the operating speed.
유한요소법과 충격 햄머 시험을 이용한 마이크로 밀링머신의 동특성 분석
장성현(S. H. Jang),김성민(S. M. Kim),황현영(H. Y. Hwang),최영휴(Y. H. Choi),박종권(J. K. Park) 한국생산제조학회 2007 한국생산제조시스템학회 학술발표대회 논문집 Vol.2007 No.10
This paper describes a case study on dynamic characteristics analysis of a 3-axis micro milling machine for micro-factory. Natural frequency and corresponding vibration modes of the machine tool structure were obtained by using both FEM modal analysis and an experimental modal test (impulse hammer test). Both the theoretical and experiment analysis results showed good agreement with each other. Finally, some discussion and review, from the view point of resonance vibration and/or mode coupled chatter, were made based on the analysis results.
모듈러 공작기계의 구조형태 창성을 위한 컴퓨터 프로그램
장성현(S. H. Jang),김성민(S. M. Kim),조성범(S. B. Jo),최영휴(Y. H. Choi) 한국생산제조학회 2006 한국생산제조시스템학회 학술발표대회 논문집 Vol.2006 No.5
This paper describes a design program to generate feasible structural configurations of modular reconfigurable machine tool from some modules. This program includes module library which defines module posture vector for each module and mutual connectivity coefficient matrix for adjacent two modules. Our design method use cryptographic mapping. By using cryptographic mapping, all the structure modules can be encoded into binary codes and then stored the graphics and digital codes in the module library. We carried out cryptographic operating to create possible combined configurations from any two or several modules by using vector quadratic form expansion of the encoded binary codes. Consequently, we can obtain the resulting structural configurations by decoding the operated binary codes using the module library.