Abstract

본 연구에서는 유한요소해석과 다구찌 방법을 통해 높은 토크 저항력과 결합력을 갖는 클린치 스터드를 설계할 때 이에 영향을 미치는 설계 변수들의 적합한 조건을 도출하였다. 목적함수로 최대성형하중과 소재의 충만율을 고려하였으며 설계변수로 홈 높이, 로브 직경, 로브 높이 그리고 홈 깊이를 선정하였고 이들 제어인자와 마찰을 잡음인자로 하여 직교배열표를 조합하고 실험횟수별 유한요소해석을 통해 성형하중과 충만율을 평가하였다. 그리고 다구찌 방법의 S/N비를 이용하여 시뮬레이션결과를 해석하였고, 이들 해석결과로부터 최적의 조합조건을 제안하였다. 충만율에 가장 큰 영향을 주는 인자는 로브 높이, 홈 높이, 로브 직경 그리고 홈 깊이 순 임을 확인하였다. This study derives the optimal conditions for design parameters of clinch stud with high torque resistance and bonding force by using FE simulation and Taguchi method. Maximum forming load and filled rate of material are considered as objective functions. Height and depth of groove with diameter and depth of lobe are chosen as design parameters. These control factors and the friction considered as noise factor are combined by orthogonal array. Forming load and filled rate are evaluated through the simulation. Simulation results are analyzed by using the ratio of signal to noise through Taguchi method. From these results, their optimal combination conditions are proposed. In the order of the most important parameter which affects filled rate, there are the height of lobe, the height of groove, the radius of lobe and the depth of groove.

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