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정상화(Sang Hwa Jeong),서호진(Ho Jin Seo) 한국기계가공학회 2008 한국기계가공학회 춘추계학술대회 논문집 Vol.2008 No.-
Implant surgery is generally accepted as the best technique to replace the teeth completely and there are many technical progresses in dental implantology. Development of CT(Computerized Tomography) and 3D visualization technique help to make the treatment plan and the surgical navigation assists the dentist during the intra-operative procedure. Regardless of the technical progress the "freehand" drilling of implant is performed frequently in the numerous implant surgery. It is still the most demanding technique to the dentist and patient. In this paper, the kinematic design of a dental implant assistant manipulator is studied. It consists of an orientation part which drives a tool angle to keep the fixed point and an insertion part which runs drill tip to desired depth. The 3-D modeling and simulation of implant assistant manipulator are performed. The kinematic mechanism is evaluated freely to move the angle of the implant handpiece by simulation based on the fixed drill tip. Orientation and depth of intial drilling are defined with the implant handpiece held by the manipulator while the surgeon drills. The advantage of this mechanism provides a better, more comfortable operating environment for the surgeon. The manipulator assists the dentist and the optimal treatment plan will be applied directly to the patient.
정상화(Sang-Hwa Jeong),신상문(Sang-Moon Shin),김광호(Gwang-Ho Kim),이상희(Sang-Hee Lee),김주환(Ju-Hwan Kim) 한국기계가공학회 2006 한국기계가공학회 춘추계학술대회 논문집 Vol.2006 No.-
Practical scope of optical elements broadens considerably such as the optical instrument, the optical communication and electronic products. Also, demands of optical components are growing due to increase of productivity. Object transport systems are driven typically by the magnetic field and the conveyer belt. However, conventional transport systems are not adequate for transportation of optical elements and semiconductors. Because conveyor belts can damage precision optical elements by the contact force and magnetic systems can destroy the inner structure of semiconductor by the magnetic field. In this paper, the object levitation transport system using ultrasonic wave is developed for transporting precision elements without damages. Principle of object transportation is similar ultrasonic motor's one. This transport system is using 2-mode ultrasonic wave excitation and modes shapes of flexural beam are evaluated by the theoretical analysis. Direction of object transportation is changed by phase difference.
초음파를 이용한 Flexural Beam의 진동에 관한 동특성
정상화(Sang Hwa Jeong),신상문(Sang Moon Shin),김광호(Gwang Ho Kim),이상희(Sang Hee Lee),김주환(Ju Hwan Kim) 한국생산제조학회 2006 한국공작기계학회 춘계학술대회논문집 Vol.2006 No.-
Recently, practical scope of optical elements broadens considerably such as the optical communication, the optical instrument and electronic products. Also, demands of optical components are growing due to increase of productivity. Object transport systems are driven typically by the magnetic field and the conveyer belt. However, conventional transport systems are not adequate for transportation of optical elements and semiconductors. Because conveyor belts can damage precision optical elements by the contact force and magnetic systems can destroy the inner structure of semiconductor by the magnetic field. In this paper, the levitation transport system using ultrasonic wave is developed for transporting precision elements without damages. This transport system is using 2-mode ultrasonic wave excitation and modes shapes of flexural beam are evaluated by the theoretical analysis.