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제원수(Wone-Soo Jea),예상돈(Sang-Don Ye),민병현(Byeong-hyeon Min) 한국기계가공학회 2007 한국기계가공학회 춘추계학술대회 논문집 Vol.2007 No.-
The brake tube is important part in automobile. The brake tube has to prevent crack, fracture and defects for braking in safety. Especially, the shape of tube end has influence on ability of brake. Based on the procedure of process design, in this paper, the forming operation is designed by finite element method and Taguchi method. Design variables and response values were selected dimension of die and damage factor.
자동차 브레이크용 튜브의 끝단 성형 공정 설계에 관한 연구
제원수(Wone-Soo Jea),예상돈(Sang-Don Ye),민병현(Byeong-Hyeon Min) 한국기계가공학회 2008 한국기계가공학회지 Vol.7 No.4
End part of the brake tube formed with the shape of snake head is important for the braking of automobile in safety because it has to prevent crack, fracture and defects occurred during the forming process. Especially, the shape of tube end has influence on the ability of brake. Based on the procedure of process design, in this paper, the forming operation is done by finite element method and the design variables are analyzed by Taguchi method. Design variables such as the outer angle of tube end with the shape of snake head(A), the inner angle to make a hole at tube end with the shape of snake head(B) and the forming distance at tube end(C) are used. Optimization of design variables is performed to minimize the damage factor of the tube end occurred during the forming process. The value of damage factor of 0.327 was obtained under the optimal condition like A=114°, B=80° and C=5.3mm, respectively.
유연 힌지를 이용한 이중레버 시스템의 변위증폭 메카니즘에 관한 연구
제원수(Wone-Soo Jea),예상돈(Sang-Don Ye),민병현(Byeong-Hyeon Min) 한국기계가공학회 2008 한국기계가공학회지 Vol.7 No.2
The high-technology industries including a semi-conductor and an information communication need an ultra-precision technology from the technological points of view. Nano technology based on an ultra-precision technology is being studied to overcome the delicate technology that may occur in the semi-conductor fields. Then, the transferring equipment with high resolution and long displacement becomes an important technology. The goal of this study is to analyze the displacement magnification mechanism driven by piezoelectric actuator which has high resolution and fast response characteristics using flexure hinge with the merits of soft displacement, negligible back-lash and stick-slip, and no-lubrication. The analyses to reduce the magnification losses occurred during the magnification process are performed using ANSYS software based on FEM. The five design variables such as arm thickness, thickness of hinge, radius of hinge, length of input side at the 1st lever and magnification ratio of 1st lever are optimized to induce the maximum magnification ratio using Taguchi method.
유한요소법을 이용한 자동차용 브레이크 파이프의 성형에 관한 연구
민병현(Byeong-Hyeon Min),제원수(Wone-Soo Jea),예상돈(Sang-Don Ye) 한국기계가공학회 2008 한국기계가공학회지 Vol.7 No.3
The brake pipe is important part in automobile. The brake pipe have to prevent crack, fracture and defects for braking in safety. Especially, shape of ends of pipe has influence on ability of brake. Based on the procedure of process design, in this paper, the forming operation is designed by finite element method. Design variable and response value was selected shape of die and damage factor. To improve die that performed FEM and compared results of two types of die.
다구찌법을 이용한 연마제 워터제트의 최적 절단 조건에 관한 연구
이재광(Jae-Kwang Lee),예상돈(Sang-Don Ye),제원수(Wone-soo Jea),오현옥(Hyun-Og Oh),최형태(Hyung-Tae Choi),민병현(Byeong-Hyeon Min) 대한기계학회 2006 대한기계학회 춘추학술대회 Vol.2006 No.6
The water jet technology is one of the cutting technologies, which can cut various materials with 2 or 3 times of the speed of sound. Surface roughness and dimension error like taper and cutting trace can be occurred according to the processing conditions such as cutting speed, stand-off distance, abrasive mixing ratio and injection pressure. In this study, processing conditions such as jet-pressure, cutting speed, orifice diameter and stand-off distance, are used by following the design of experiments with 3 levels. Al6101 material which is normally applied on the spot, is applied. Cutting test is conducted twice at each condition. Center line surface roughness is measured by using the surface roughness measuring machine, and taper value of cutting surface is also measured by using 3D measuring machine.Through the S/N ratio analysis with measured values, the optimization value of processing conditions to minimize the surface roughness and taper value is obtained.