本研究在探討一金屬卡扣彈簧片,承受一筆狀且材質為SKH51之高速鋼的橫向力作用之後,所產生的插入力和拔出力的分析。研究方法是利用有限元素分析軟體進行原始設計組的模擬,求得彈簧片受金屬筆的作用後的插入力和拔出力,並以實驗實證此一模擬組的正確性和合理性。再來利用田口法實驗的設計程序,將品質目標設定為插入力3.92N (0.4kgf)和拔出力7.84N (0.8kgf),並設定控制因子各為A (材質)、B (支點距離)、C (右側水平距離)、 D (左側水平距離)、E (頭部水平距離)、F (寬度)、G (厚度)、H (R角),由此獲得影響各單一品質目標的最主要因子和最佳化參數組合,並且進行變異數分析以比對田口實驗,最後運用灰關聯分析以求出彈簧片的多重品質性質,因而決定彈簧片的最佳設計因子組合。經由本研究分析結果得知,主要影響控制因子為G,而最佳化的參數組合為A1B3C1D2E2F1G2H3,即材質為BeCu C17200 1/2HT,支點距離為18.7mm,右側水平距離2.48mm,左側水平距離為4.25mm,頭部水平距離為0.67mm,寬度為2.2mm,厚度為0.2 mm,R角為6.8mm。
This study is to discuss the best design factor combination of the insert and pulling force of a flat spring compressed by a lateral force of the high-speed-steel SKH51. This study used the FEM method to simulate an original model and attained the insert and pulling force. Then, an experimental was practiced to evident the correctness of the FEM simulation. Ths study using the Taguchi method and set up the target of insert force is 3.92N (0.4kgf), and pulling force is 7.84N (0.8kgf). And the control factors are A(material), B(fulcrum distance), C(righ-side distance), D(left-side distance), E(head distance), F(width), G(thickness), H(arc). Therefore, the each main factor of insert and pulling force were available. To verify the Taguchi method, ANOVA was performed to evident the main factor of each force. Finally, the Grey Relational Analysis was used to find out the best design combiantion. The final result shows that the factor G is the main factor, the best design combination is A1B3C1D2E2F1G2H3. Each best factor of material is BeCu C17200 1/2HT, fulcrum distance is 17.2mm, righ-side distance is 2.48mm, left-side distance is 4.25mm, head distance is 0.67mm, width is 2.2mm, thickness is 0.2mm and arc is 6.8mm.