(南京航空航天大學(xué) 機(jī)電學(xué)院，南京 210016)
摘 要: 針對鋁合金板材成形性差的特點，提出液體內(nèi)向流動動態(tài)充液拉深新技術(shù)。采用鋁合金2A12-O板材對成形過程進(jìn)行了初步實驗驗證后，運用有限元方法探討不同的徑向壓力和不同的預(yù)脹路線對成形零件壁厚分布的影響。結(jié)果表明，采用該方法可以顯著提高鋁合金2A12-O的成形極限，成功拉深出拉深比達(dá)2.85的杯形件；徑向壓力顯著影響杯形件壁厚的分布，通常較大的徑向壓力下的壁厚也較大。
關(guān)鍵字: 鋁合金2A12-O；動態(tài)充液拉深；徑向壓力；反向液體流動
（College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics,
Nanjing 210016, China）
Abstract:A new method, named hydrodynamic deep drawing with radially inward flowing liquid, was proposed, aiming at the poor formability of aluminium alloy sheet. After a preliminary experimental validation of the proposed method by using 2A12-O aluminum alloy, the effects of different radial pressures and different pre-bulging loading paths on the wall thickness distribution of the formed cups were investigated with the assistance of FEM. The results show that the foming limit of 2A12-O aluminum alloy is obviously improved by the method, and a cup with a drawing ratio of 2.85 is formed successfully. The radial pressure during the deep drawing process has a great influence on the wall thickness distribution of the formed cups. In general, the higher the radial pressure, the thicker the wall thickness.
Key words: 2A12-O aluminum alloy; hydrodynamic deep drawing; radial pressure; radially inward flowing liquid
