本文選題：鋁合金　切入點：精沖　出處：《鍛壓技術(shù)》2016年08期

【摘要】：為探究溫度在改善6061鋁合金精沖質(zhì)量時的作用,通過單向拉伸試驗獲取6061鋁合金在不同溫度條件下的應(yīng)力-應(yīng)變曲線,然后結(jié)合單拉試驗和有限元模擬,確立了斷裂閾值與溫度的關(guān)系,并將溫度耦合到Normalized Cock Croft-Latham準(zhǔn)則中,利用有限元模擬軟件分析對比不同溫度條件下6061鋁合金精沖過程,最后利用精沖實驗對模擬結(jié)果進行驗證。結(jié)果表明,升溫延緩了斷裂的產(chǎn)生和擴展,25℃時精沖剪切區(qū)幾乎完全斷裂,而175℃時剪切區(qū)裂紋僅在凹模刃口附近產(chǎn)生,凸模附近尚未產(chǎn)生裂紋;隨著溫度的升高,精沖件斷面質(zhì)量改善,光亮帶厚度從25℃時的1.53 mm上升到175℃時的3.02 mm,斷裂帶厚度從25℃時的3.68 mm下降到175℃時的2.06 mm。
[Abstract]:In order to explore the effect of temperature on improving the precision quality of 6061 aluminum alloy, the stress-strain curves of 6061 aluminum alloy under different temperature conditions were obtained by uniaxial tensile test, and then combined with single tensile test and finite element simulation. The relationship between fracture threshold and temperature is established, and the temperature is coupled to the Normalized Cock Croft-Latham criterion. The finite-element simulation software is used to analyze and compare the fine blanking process of 6061 aluminum alloy at different temperatures. Finally, the simulation results are verified by the precision punching test. The results show that the temperature rise delays the occurrence of the fracture and almost completely breaks the fine punching shear zone at 25 鈩，

本文編號：1665072