• 한국기계가공학회지
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• 제7권2호
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• pp.52-59
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• 2008

The objective of this study is to develop an automatic object changer unit to improve processing problems existed in the conventional horizontal machining center. To achieve this goal, this study designed a horizontal transfer as the second project continued to the first project that designed a upward and downward traverse unit. A horizontal traverse unit shows a symmetric structure and consists of frame, which consists of four unit tools, motor and reducer, which are fixed at a frame, operation unit with pinions, first traverse unit, and second traverse unit. Constraint conditions based on the operation mechanism with these elements were configured and obtained following results after modeling a model for a traverse motor. In the kinematic expression of sliding motion with one degree of freedom, the sliding motion is constrained. Also, the rack 3 installed at a frame is used to configure possible kinematic constraint conditions of the rack 2 according to the rolling motion of the pinion 2 in the first traverse unit. In addition, the moment of inertia that is a type of kinetic energy in a converted horizontal traverse unit in the side of the reducer can be applied to introduce the moment of inertia of a converted horizontal traverse unit in the side of the reducer by using the sum of kinetic energy in the rack and pinion, which is a part of the horizontal traverse unit. Also, the equation of motion of the converted upward and downward traverse unit in the side of the motor using the equation of motion of the motor. Furthermore, the horizontal traverse unit predetermines the mass of the first and second traverse unit and applied load including the radius and reduction ratio of the pitch circle in the pinion 1 and applied load to the rack 2. Then, a proper motor can be determined using several parameters in the upward and downward traverse unit in order to verify such predetermined specifications. In future studies later this study, a simulation that verifies the results of the previous two stages of studies using a finite element method.

• 한국기계가공학회지
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• 제7권2호
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• pp.45-51
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• 2008

The objective of this study is to develop an automatic object changer unit to improve processing problems existed in the conventional horizontal machining center. In order to perform this objective, a upward and downward traverse unit in which a unit that consists of a motor and reducer, chain and sprocket wheel, and upper and lower base employed in an automatic object changer unit performs sliding contact motion in a frame was designed. To achieve this design, constraint conditions for the upward and downward traverse unit first designed. Then, an operation mechanism was designed and that was introduced as a sum of kinetic energy for the sprocket wheel and upper and lower base based on the moment of inertia, which is the kinetic energy of the converted upward and downward traverse unit in the side of the reducer. In addition, The work required to rotate the converted upward and downward traverse unit in the side of the reducer by one revolution can be calculated using the sum of work that is required in the sprocket wheel and upper and lower base that is a part of the upward and downward traverse unit. Furthermore, the converted equation of motion in the side of the motor can be introduced using the equation of motion using the converted upward and downward traverse unit in the side of the motor. Then, Then, a proper motor can be determined using predetermined specifications employed in the motor and several parameters in the upward and downward traverse unit in order to verify such predetermined specifications. Also, a design of a horizontal traverse unit that performs sliding motion on a upward and downward traverse unit and simulation that verifies the results of this design are required as a future study.

• 한국추진공학회:학술대회논문집
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• 한국추진공학회 2017년도 제48회 춘계학술대회논문집
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• pp.30-35
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• 2017

한국형발사체 발사대시스템의 지상기계설비는 수평상태로 총 조립된 발사체를 조립동에서 발사패드로 이송하여 기립 후 안착시키고, 발사체로의 추진제 공급을 위한 공급 및 분리장치를 제공하며 발사체 이륙까지의 기구학적인 동작과 기계적인 운용을 담당하는 설비이다. 본 논문에서는 한국형발사체의 요구조건을 충족시키기 위하여 개발 중인 지상기계설비들의 구성과 기능, 형상 설계 결과를 소개하고, 발사운용절차에 따른 각 장치들의 운용개념을 소개한다.

• 한국추진공학회지
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• 제22권4호
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• pp.125-132
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• 2018

한국형발사체 발사대시스템의 지상기계설비는 수평상태로 총 조립된 발사체를 조립동에서 발사패드로 이송하여 기립 후 안착시키고, 발사체로의 추진제 공급을 위한 공급 및 분리장치를 제공하며 발사체 이륙까지의 기구학적인 동작과 기계적인 운용을 담당하는 설비이다. 본 논문에서는 한국형발사체의 요구조건을 충족시키기 위하여 개발 중인 지상기계설비들의 구성과 기능, 형상 설계 결과를 소개하고, 발사운용절차에 따른 각 장치들의 운용개념을 소개한다.