(1. 燕山大學(xué) 機(jī)械工程學(xué)院，秦皇島 066004；
2. 燕山大學(xué) 車輛與能源學(xué)院，秦皇島 066004)
摘 要: 提出基于固體顆粒介質(zhì)成形(SGMF)工藝的鎂合金板材差溫拉深工藝，并展開試驗(yàn)研究。通過對AZ31B鎂合金薄板進(jìn)行差溫拉深成形試驗(yàn)，研究了成形溫度、拉深速度、壓邊力、壓邊間隙、凹模圓角和潤滑條件對拉深性能的影響，確定AZ31B鎂合金板料最佳成形工藝參數(shù)。結(jié)果表明：該工藝可顯著提高鎂合金板材的成形性能，成形溫度及拉深速度對板料拉深性能影響較大，板料最佳成形溫度區(qū)間為290~310 ℃，顆粒介質(zhì)與板料理想溫差為110~150 ℃；壓邊力和壓邊間隙對拉深性能產(chǎn)生聯(lián)合影響；此外，凹模圓角和潤滑條件也對拉深性能有一定的影響。當(dāng)上述工藝參數(shù)達(dá)到最佳值時成功拉深出極限拉深比(LDR)為2.41的工件。
關(guān)鍵字: AZ31B鎂合金；固體顆粒介質(zhì)成形；差溫；拉深性能
magnesium alloy sheet
（1. College of Mechanical Engineering, Yanshan University, Qinhuangdao 066004, China;
2. College of Vehicles and Energy, Yanshan University, Qinhuangdao 066004, China）
Abstract:The non-isothermal drawing of the magnesium alloy sheet in solid granular medium forming (SGMF) technology was put forward. The non-isothermal drawing experiment of the AZ31B magnesium alloy sheet was conducted, through which, the impacts of the forming temperature, the drawing speed, the blank holder force and the blank holder gap as well as the female die fillet and lubrication condition on the drawing performance were studied, then the optimal process parameters were determined for AZ31B magnesium alloy sheet. The results show that this process is beneficial to significantly enhance the formability of the magnesium alloy sheet, the forming temperature and the drawing speed have great impact on the drawing performance of the sheet metal, whose optimal forming temperature is 290−310 ℃, and the ideal temperature difference between the granular medium and the sheet metal is supposed to be 110−150 ℃. The blank holder force and the blank holder gap combine to make effects on the drawing performance. Besides, the female die fillet and lubrication condition also have certain impact on the drawing performance. The workpiece with limit drawing ratio (LDR) of 2.41 is successfully obtained when the previous parameters achieve the corresponding optimal values.
Key words: AZ31B magnesium alloy; solid granules medium forming; non-isothermal; drawing performance
