空心鋁型材擠壓數值模擬與模具結構優化
作者：劉佳欣，劉佳寧，陳文琳（合肥工業大學材料科學與工程學院，安徽宣城242000）
摘要：對成形某空心鋁型材進行擠壓模設計和三維建模，采用有限元模擬軟件對擠壓工藝進行模擬，并計算擠壓型材截面上的速度差和速度均方差。通過分析模擬結果的速度分布和速度均方差，采用依次增設阻流塊、引流槽和加長工作帶的方法，改善擠壓模出口流速的均勻性，使速度均方差降至合理范圍，以獲得最終模具設計方案。
關鍵詞：鋁型材；速度均方差；速度分布；數值模擬；模具結構優化
中圖分類號：TG76;O242.21 文獻標識碼：B 文章編號：1001-2168（2020）10-0001-06
DOI：10.16787/j.cnki.1001-2168.dmi.2020.10.001
Numerical simulation and die structure optimization of hollow aluminum extrusion
LIU Jia-xin, LIU Jia-ning, CHEN Wen-lin (School of Materials Science and Engineering, Hefei University of Technology, Xuancheng, Anhui 242000, China)
Abstract: The extrusion die for a hollow part was designed and the 3D modeling was carried out. The extrusion process was simulated by using finite element numerical simulation software, and the velocity difference and mean square deviation of the extrusion section were calculated. By analyzing the simulation results, the methods that adding blocking block, drainage tank, and lengthening working belt were adopted in turn to improve the uniformity of flow velocity at the outlet, and reduce the mean square deviation of velocity to a reasonable range.
Key words: aluminum profile; mean square deviation of velocity; velocity distribution; numerical simulation; die structure optimization