【摘要】：以拐角長懸臂空心鋁型材為例,使用Hyper Xtrude分析軟件對其擠壓過程進行數(shù)值模擬,設(shè)計正交試驗研究了擠壓速度、棒料預(yù)熱溫度、擠壓筒預(yù)熱溫度、模具預(yù)熱溫度、棒料直徑、棒料長度等工藝參數(shù)對型材出口截面流速均方差(SDV)和溫度均方差(SDT)的影響規(guī)律。結(jié)果表明:通過極差分析及再次模擬確定最優(yōu)方案為:擠壓速度1 mm·s~(-1),棒料預(yù)熱溫度440℃,擠壓筒預(yù)熱溫度420℃,模具預(yù)熱溫度400℃,棒料直徑Φ150 mm,棒料長度450 mm,對應(yīng)的SDV與SDT分別僅為1.3680和1.9130,保證擠出型材獲得高的綜合質(zhì)量。通過方差分析得到擠壓速度對SDV的影響度及棒料預(yù)熱溫度對SDT的影響度分別高達67.50%和76.41%,定量地表明擠壓速度和棒料預(yù)熱溫度分別是影響型材外觀質(zhì)量和內(nèi)部組織的最主要工藝參數(shù)。工廠擠壓出的合格產(chǎn)品驗證了最優(yōu)方案的可靠性。
[Abstract]:Taking long cantilever hollow aluminum profile at corner as an example, the extrusion process was simulated by Hyper Xtrude software. The extrusion speed, preheating temperature of bar, preheating temperature of extruding tube, preheating temperature of die, diameter of rod were studied by orthogonal test. The influence of technological parameters such as bar length on the flow rate mean square (SDV) and temperature mean square (SDT) at the exit section of the profile was studied. The results show that the optimum scheme is as follows: extrusion speed 1 mm s ~ (-1), bar preheating temperature 440 鈩，

本文編號：2429906