Abstract:
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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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Reference:
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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
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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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