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이론적 방법과 유한요소해석이 융합된 커팅용 공구 혼의 설계에 관한 연구
이한창,정진혁,박충우,오명석,박명규,이봉구,김창환,Lee, Han-Chang,Jeong, Jin-Hyuk,Park, Chung-Woo,Oh, Myung-Seok,Park, Myung-Kyu,Lee, Bong-Gu,Kim, Chang-Hwan 한국융합학회 2018 한국융합학회논문지 Vol.9 No.6
본 연구에서는 초음파 진동에너지가 융합된 커팅기용 공구 혼 제작에 대한 기초 연구 자료를 제작하고자 이론적방법과 유한요소해석을 병행하여 설계하였다. 고 성능의 초음파 절단을 진행하기 위해서는 횡진동이 아닌 종진동으로만 진동해야 하며, 기계적 진동에너지를 효율적으로 전달하기 위해 출력부에 최대진폭이 발생해야 한다. 따라서 공구 혼은 발진기의 가진 주파수와 공구 혼의 고유주파수가 동일하게 설계되어야만 한다. 공구 혼을 공진설계하기 위해서는 1차원 파동방정식을 이용한 이론적 접근법과, 유한요소 해석결과를 설계모델에 반영하는 방법이 있는데, 본 연구에서는 최초에 공구 혼의 대략적인 치수를 1차원 파동방정식을 통해 결정하고, 유한요소 해석 결과를 바탕으로 최적 모델을 선정하여 공구 혼의 최종 형상에 반영하였다. 이와 같은 내용을 실제 커팅용 공구 혼의 기초자료로 활용하고자 하며, 추후 제작 및 실험 데이터를 본 연구내용과 비교할 예정이다. In this study, the theoretical method and the finite element analysis were designed in parallel to fabricate basic research data on the production of tool horn for cutting machine with ultrasonic vibration energy. In order to perform high-performance ultrasonic cutting, it is necessary to vibrate only with longitudinal vibration instead of transverse vibration. In order to efficiently transmit the mechanical vibration energy, the maximum amplitude should be generated at the output portion. Therefore, the tool horn must be designed so that the excitation frequency of the oscillator and the natural frequency of the tool horn are the same. In order to design the resonance of the tool horn, there are a theoretical approach using the one-dimensional wave equation and a method of reflecting the finite element analysis result to the design model. In this study, the approximate dimensions of the tool horn are first determined through the one- Based on the results of the finite element analysis, the optimal model was selected and reflected in the final shape of the tool horn. We will use this information as the basic data of actual tool horn for cutting, and will compare the production and experimental data with the contents of this research.
李漢昌(Lee, Han-Chang) 백산학회 2004 白山學報 Vol.- No.70
In this report, the general history of Siho was described and illustrated giving an example of Lee Suktan(Lee Sineui), who received this title after his death. This system had been originated from Ju dynasty in China in approximately BC 11th century, and influenced and practiced Korea thereafter. The Siho was a kind ofggmg posthumous name given by a king for dignitary or meritorious man after evaluating the value of his accomplishment. Consequently, there were two types of Siho; favorable one and unfavorable one. If the ancestor made a beneficial achievement to the society and received a favorable Siho, then it accepted a great honor to himself and his descendents, but in unfavorable one was diametrical In order to give Siho, the evaluator was supposed to follow the regulation called Sibub in which the standard to choose suitable ideograms depending on the qualification of the person was described for each case and also the meanings of the each ideograms were explained. Lee Suktan received Siho, the title, Munjunggong after his death in 1685 and it was a favorable one according to Sibub. However, considering the procedure of giving Siho, it can find abnormal aspects in the process. Compared to the regular period to take Siho, it took so long that we can not overlook it. It took 58 years and despite his defect of qualification, he received it anyway. It was a very special case and that’s why it was cited in this report.