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摘要：
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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。
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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.
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基金项目：
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作者简介：
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参考文献：
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1 Kazuhiko Nakamura and Takeo Nakagawa. Fracturemechanism and fracture contril in deep drawing with hy-draulic counter pressure. Journal of the JSTP, 1984, 25(284): 83l~838
2 Kazuhiko Nakamura and Takeo Nakagawa. RadialPressure Assisted hydraulic counter pressure deep drawing.Journal i the JSTP, 1985, 26 (288): 73~8O
3 Inoue N, Nishihara M. Hydrostatic Extrusiin Theoryand Applications. London: Elsevier Applied Science Publish-ers, 1985.
4 Kurt Lange. Handbook of metal Forming. London:R. R. Dennelley & Sons Company, 1985.
5 G Saches. Drawing Thin-Walled Tubing With a Mov-ing Mandrel Through a Single Stationary Die. J. Appl.Mech., 1944 (11)
6刘镇北,王成敏.锥面间流体流动考虑流动惯性的近似解.应用数学和力学,1988,9(3):253～265
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