熱沖壓工藝對6061鋁合金U型件成形質量的影響
發布人：上海艾荔艾合金股份有限公司www.shailiai.cn
更新時間：2016-07-05
利用有限元分析軟件MSC.Marc，研究板料初始溫度、壓邊力、保壓時間等工藝參數對制件厚度、回彈的影響規律，并通過6061鋁合金板材熱沖壓實驗驗證仿真分析的可靠性。
熱沖壓工藝對6061鋁合金U型件成形質量的影響Effect of hot stamping process on forming quality of 6061 aluminum alloy U-shaped parts利用有限元分析軟件MSC.Marc，研究板料初始溫度、壓邊力、保壓時間等工藝參數對制件厚度、回彈的影響規律，并通過6061鋁合金板材熱沖壓實驗驗證仿真分析的可靠性。結果表明:板料熱沖壓初始溫度在465~565 ℃范圍內變化時對該制件厚度分布和回彈量的影響不大；壓邊力對制件成形質量影響明顯，本工況下選用3 kN較為合適；兼顧制件保壓結束時刻的溫度以及最終的回彈量，保壓時間選擇5 s左右比較合適。進一步開展成形制件熱處理后的力學性能測試分析，并與常規固溶淬火-時效熱處理后的6061-T6鋁合金進行比較，發現熱沖壓制件的力學性能并未弱化，且同一熱沖壓制件不同位置硬度差異在10%以內。
The factors affecting the thickness and the springback of the parts were investigated including initial blank temperature, blank holder force (BHF) and the holding time using MSC.Marc finite element analysis software. The reliability of finite element simulation was proved by the hot stamping experiments of 6061 aluminum alloy. The results show that sheet metal initial temperature has a little influence on the thickness and the springback when it changes in the range of 465-565 ℃. The influence of BHF on the forming quality of aluminum alloy is obvious. The use of 3 kN is more appropriate. Combined with the temperature and the final amount of springback in the end of the product, the time selection of 5 s is appropriate. The mechanical properties of the forming parts were analyzed, and compared with the conventional solid solution quenched and aged 6061-T6. It is found that the mechanical properties of hot stamping parts have not been weakened, and the hardness of the same hot stamping parts is less than 10%.
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