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CAE 해석에 기반 한 DOE 를 이용한 자동차 부품의 점 용접점 개수 최적화
최누리(Noori Choi),박정민(Jung-min Park),이병채(Byung-chai Lee) 대한기계학회 2005 대한기계학회 춘추학술대회 Vol.2005 No.11
A vehicle body usuallu has more than 4,000 spot weld point and reducing the number of those points greatly reduces production cost of a vehicle. We choose spot weld points that can be removed without decreasing of frequency of a component of vehicle body using DOE (design of experiment). Initial candidate points were chosen by sensitivity analysis and 2-level DOE with respect to frequency analysis was used to determine points that would be removed. We applied proposed methodology to the LCA (lower control arm) of a vehicle.
최누리(Noori Choi),변형배(Hyung Bai Byun),김동석(Dong Seok Kim),이병채(Byung Chai Lee) 대한기계학회 2006 대한기계학회 춘추학술대회 Vol.2006 No.6
In many mechanical structures, the number of spot welds is closely related to overall cost and time of production of assemblies. In this study, we optimized the location and the number of spot welds in the lower control arm of the vehicle, as far as the structure retained the maximizing the fatigue resistance and durability. To ensure the requirements, we proposed design of experiment optimization method for the durability of LCA. During this optimization process, the design guideline for the optimal spot welding number and location was drawn as the minimum life expectation influence.
엄재성(Jaesung Eom),최누리(Noori Choi),이병채(Byung-chai Lee),김동석(Dongseok Kim) 대한기계학회 2006 대한기계학회 춘추학술대회 Vol.2006 No.6
The design of the spot welded joints affects the overall quality and the safety of the final product in industry. The cost of each spot weld is not negligible, however designs based on experiences is apt to lead redundant spot welded joints. In this study, a systemic optimization process of spot welding point configuration is used in the light of global structural rigidity. We propose measurable design indexes on the design of spot weld configuration, dealing with the required number and location of spot weld joints under the given design parameters for the desired structural rigidity. We use a series of the sizing optimizations for the structural rigidity. As a result, the survival index for each spot weld point is devised for a new design guide.