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채홍윤(Hongyun Chae),정홍래(Hongrae Jeong),임민혁(Minhyeok Yim) 한국자동차공학회 2021 한국자동차공학회 부문종합 학술대회 Vol.2021 No.6
In the production process, the assemblability of products decrease that different from what we expected on designing. So we have to revise the dimension and the tolerance in optimized methods to minimize losses of the cost and the schedule. For this, I applied Tolerance analysis. And I identified the quality changes due to the dimension changes and the accumulated tolerance. And then I drew the optimized conclusion. On the trailing arm and carrier assemblability, I found out that the most effective factor is the hole size tolerance of trailing arm. And I drew the optimized conclusion as the hole extension of trailing arm. It decreased assembly error and have been applied to the products. Finally I checked improvements of the products assemblability. With this study, I improved the assemblability of the trailing arm and carrier by minimized design change. Monte carlo tolerance analysis what I used in this study is pretty accurate. And it can be used as the effective method to design dimensions and optimized tolerances.
채홍윤(Hongyun Chae),정홍래(Hongrae Jeong),안희태(Heetae Ahn),손준형(Junhyeong Sohn),김성구(Seonggoo Kim),황한영(Hanyoung Hwang),김진성(Jinsung Kim) 한국자동차공학회 2020 한국자동차공학회 학술대회 및 전시회 Vol.2020 No.11
The stiffness of subframe has a great effect on the NVH of vehicle. Usually, dampers are applied to subframe for NVH improvement. But it is inefficient because it excessively increases the weight of vehicle. It is necessary to improve stiffness while minimizing the weight gain of subframe. For this, we conducted the topology optimization and got the load path of subframe. We analyzed the load path and eliminated unnecessary parts to reduce weight. Structural important parts were reinforced to increase stiffness. It resulted in 0.3㎏ increase in the weight of subframe and 20.8㎐ increase in the natural frequency. In this study, We propose the method that improved the stiffness while minimize weight of subframe.