(1. 上海交通大學(xué) 機(jī)械與動力工程學(xué)院， 上海 200030；
2. 上海交通大學(xué) 材料科學(xué)與工程學(xué)院， 上海 200030)
摘 要: 采用Gleeble3500熱模擬實(shí)驗(yàn)機(jī)進(jìn)行了單向拉伸實(shí)驗(yàn)， 分析了AZ31鎂合金板材的力學(xué)性能； 以此實(shí)驗(yàn)數(shù)據(jù)為基礎(chǔ)， 對溫?zé)釠_壓過程進(jìn)行了數(shù)值模擬， 研究了拉深溫度、 壓邊力等工藝因素對鎂合金板材成形性能的影響；通過極限拉深比實(shí)驗(yàn)， 對數(shù)值模擬結(jié)果進(jìn)行了實(shí)驗(yàn)驗(yàn)證。 結(jié)果表明： 在極限拉深溫度150 ℃， 極限拉深速度15 mm/s， 固定壓邊力的工藝條件下， 極限拉深比能夠達(dá)到2.5。 模擬結(jié)果表明：模擬結(jié)果和實(shí)驗(yàn)結(jié)果具有良好的一致性； 采用變壓邊力可以明顯提高板材的沖壓性能， 極限拉深比將達(dá)到5.0。
關(guān)鍵字: AZ31鎂合金板材； 溫?zé)釠_壓； 數(shù)值模擬； 極限拉深比； 變壓邊力
warm deep drawing of
AZ31 magnesium alloy sheet
（1. School of Mechanical Engineering,
Shanghai Jiao Tong University, Shanghai 200030, China;
2. School of Materials Science and Engineering,
Shanghai Jiao Tong University, Shanghai 200030, China）
Abstract: The uniaxial tensile test was conducted by using Gleeble 3500 thermal-mechanical simulator, and the mechanical property of AZ31 magnesium alloy sheet was analyzed. The test results were then employed in the numerical simulation of warm drawing process, and the influences of process parameters such as drawing temperature, blank holder force were investigated. In order to validate the simulation results, the limiting drawing ratio tests were also performed. The results show that， under the technique condition of limit forming temperature of 150 ℃ and limit drawing velocity of 15 mm/s, the limiting drawing ratio can reach 2.5. The simulation results show that， simulation results are consistent with the experimental results. Using variable blank holder force can remarkably improve the forming performance, and the limiting drawing ratio would reach 5.0.
Key words: AZ31 magnesium alloy sheet; warm drawing; numerical simulation; limiting drawing ratio; variable blank holder force
