本計畫為一年期計畫，其研究主題在於提出一個可以統御鍛粗加工問題的異向性摩擦模式，並將其應用於有限元素分析中，以探討摩擦異向性對鍛件變形行為的影響。異向性摩擦模式的數學關係式將採用多項式函數，其中的待定係數將利用先前以鋁合金A6061 為試片所得到的鍛粗實驗結果，以曲線擬合的回歸方式決定之。其次，該異向性摩擦模式將應用於有限元素軟體DEFORM 3D 進行鍛粗加工問題的分析與討論，其最終目的在於提供較佳的製程加工條件，以確保鍛粗工件的品質。然而，為驗證理論分析結果的預測性及妥適性(包含異向性摩擦模式的預測性及有限元素分析結果的妥適性)，本計畫亦將實施一系列的相關鍛粗實驗，其中採用的加工參數條件將和用以決定前述待定係數的先前鍛粗實驗結果有所區別。因此，本計畫的實驗結果除了可以提供做為直接驗證理論的用途外，亦將用以探討鍛件表面粗糙度對鍛件變形行為的影響，以期獲得更完善的分析結果。This research proposal is of an one-year period. It deals with proposing an anisotropic frictional model that is capable of governing non-uniform frictional stress distributed on the contact interface between the tool and upset forging of ring. The model proposed in this project will be employed in finite element analyses in order to investigate the effect of anisotropic frictional stress on the deformation behavior of the upset forging of ring. First of all, the anisotropic frictional model will be mathematically proposed in the form of polynomials, where the material parameter for aluminum alloy A6061 can be determined using the method of curve fitting to the experimental data previously obtained by the applicant from the test of upset forging of ring. Then, the model will be employed in a finite element software DEFORM 3D to further analyze the problem of upset forging of ring. Finally, it is expected that a rational condition consisting of the working parameters generally concerned in the problem be summarized, and therefore the product manufactured in this way can be secured in good quality under the consideration of economic cost. However, in order to verify the validity of the theoretical analysis, including the predictability of the proposed anisotropic model as well as the capability of DEFORM 3D in the problem of upset forging of ring, a series of experiments will be also conducted. Furthermore, the experiments will be carried out under the condition different from the ones having used to determine the material parameter. In addition to be used for the purpose of verification of the theoretical analysis, the experimental result can also be discussed for better understanding the effect of surface roughness on the anisotropic deformation behavior of upset forging of ring. 研究期間：10008 ~ 10107
