http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
차량 쏠림 개선을 위한 전륜 현가시스템의 기하공차 최적화
김용석(Yongsuk Kim),장동영(Dongyoung Jang) 대한기계학회 2009 大韓機械學會論文集A Vol.33 No.9
This study is focused on simulation-based dimensional tolerance optimization process (DTOP) to minimize vehicle pulls by reduction of dimensional variation in front suspension system. In previous studies, the effect of tires and wheel alignment sensitivity have mainly been investigated to eliminate vehicle pulls in nominal design condition without allocating optimal tolerance level for selected components, among various factors regarding vehicle pulls such as vehicle design parameters, vehicle weight balance, tires, and environmental factors. Unfortunately, there are wide variations in the real vehicle, and these have impacted actual vehicle pulls, especially wheel alignment effects from suspension geometry variation has not been considered in the previous studies. In the tolerance design of suspension, tolerance variables with the uncertainty such as parts dimensional variation, assembly process, datum position and direction, and assembly tool tolerance has a great influence on the variation of the suspension dimensional performances. This study introduces total vehicle pull prediction model in considering major key factors for vehicle pull sensitivity. The Monte Carlo-based tolerance analysis model using Taguchi robust method is developed to optimize dimensional tolerance parameters, satisfying on the target variation level.
장훈근(HunKeun Chang),장동영(DongYoung Jang),한동철(DongChul Han) 한국생산제조학회 2004 한국생산제조시스템학회 학술발표대회 논문집 Vol.2004 No.10
Cutting force is important to understand cutting process in milling. To measure cutting force, tool dynamometer is widely used but it is hard to apply in workshop condition. Cutting force measurement which doesn't affect cutting process is needed. Using relations between cutting force and spindle displacement, cutting force can be predicted. Cylindrical capacitive sensor was used to measure spindle displacement during cutting. And signals from tool dynamometer collected to compare with spindle displacement. The result shows spindle displacement has a linear relation with cutting force. Using this result, a simple method to predict cutting force could be applied at workshop condition.
조병만(Byungman Cho),이승태(Seungtae Lee),임충혁(Chunghyuk Yim),장동영(Dongyoung Jang),이원구(Wongu Lee),노종화(Jongwha No),한용섭(Yongseop Han),김영수(Youngsoo Kim),임자경(Jakyung Lim) 대한기계학회 2005 대한기계학회 춘추학술대회 Vol.2005 No.5
In this paper, carriage type welding robot system is developed. The carriage type welding robot are widely used in welding field but the useful and robust robots are not developed yet. The development of robot is initiated based on the requirement of the welding field and is regarded as a representative model of the successful cooperation of field, institute, and university. In this paper, we design the body, circuit, and control algorithm of the robot with the help of Daewoo and Convex Co. The developed robot systems are now used for field test in welding field in Daewoo heavy industry and waits for mass production.
장훈근,장동영,한동철 한국공작기계학회 2004 한국공작기계학회 추계학술대회논문집 Vol.2004 No.-
Cutting force is important to understand cutting process in milling. To measure cutting force, tool dynamometer is widely used but it is hard to apply in workshop condition. Cutting force measurement which doesn't affect cutting process is needed. Using relations between cutting force and spindle displacement, cutting force can be predicted. Cylindrical capacitive sensor was used to measure spindle displacement during cutting. And signals from tool dynamometer collected to compare with spindle displacement. The result shows spindle displacement has a linear relation with cutting force. Using this result, a simple method to predict cutting force could be applied at workshop condition.
김일해,김진현,장동영 한국공작기계학회 2003 한국공작기계학회 춘계학술대회논문집 Vol.2003 No.-
Monitoring chattering is also important for realizing an unmanned machining system. While many researches were done on this area, it is still a difficult job to detect very small amplitude amount of chattering. A monitoring system using a capacitive spindle displacement sensor was developed to monitor cutting vibration in turning in this research. The variance of the measured spindle displacement signals using the developed sensor was calculated and utilized to quantify the small vibration in machining. The results were compared with variance obtained using a tool dynamometer. The result showed that the developed system could be utilized in monitoring the subtle changes of cutting vibrations with high sensitivity confidence.