【摘要】 提出了一种称为正向充液变薄拉深的工艺方法。从理论上推导出变薄成形传力区拉应力计算式，并采用软铝车削毛坯进行了正向充液变薄拉深试验。当液压达到120MPa时，车削软铝毛坯的极限变薄拉深系数由0.5减小到0.3，说明正向充液变薄拉深工艺能有效地提高一次变薄拉深成形极限。更多还原

【Abstract】 A new technique named as forward hydro-mechanical ironing is put forward. Formulas for counting the force-transmitting area’s tensile stress of ironinig are derived out, and experiments of forward hydro-mechanical ironing in turned soft-aluminum pre forms are carried out. When hydraulic pressure reaches 120 MPa, ironing limit coefficient of turned soft-aluminum pre forms reduces from 0. 5 to 0. 3. This shows that the new technique of forward hydro-mechanical ironing can effectively increase the forming limit of ironing for a single time.更多还原