Effect of blank holder pressure on viscous pressure forming aluminum alloy ladder parts |
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作者姓名: | 王忠金 王新云 王仲仁 |
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作者单位: | SchoolofMaterialsScienceandEngineering,HarbinInstituteofTechnology,Harbin150001,China |
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摘 要: | Viscous pressure forming (VPF), is suitable for forming difficult-to-form sheet metal parts. An investigation in the effect of blank holder pressure(BFIP) on VPF aluminum alloy ladder parts was conducted. Based on experimental and numerical simulation results of the effect of BFIP on dimensional accuracy, wall-thickness reduction, forming pressure, material flow and defects (such as wrinkling and fracture) of specimens, the effect patterns of BFIP load path on VPF ladder parts were explained. The limits of BFIP corresponding to specimens with no defect and with wrinkling or fracture defect were determined. In the limits of formable BFIP, the variable load path of BFIP was beneficial to drawing blank into the die and decreasing wall-thickness reduction of specimens. The experimental results show that the ladder parts of good surface fineness and high dimensional accuracy can be obtained by variable load paths of BHP.
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关 键 词: | 坯件夹住器 铝合金 粘性模压成型 阶梯部分 VPF |
Effect of blank holder pressure on viscous pressure forming aluminum alloy ladder parts |
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Abstract: | Viscous pressure forming (VPF), is suitable for forming difficult-to-form sheet metal parts. An investigation in the effect of blank holder pressure (BHP) on VPF aluminum alloy ladder parts was conducted. Based on experimental and numerical simulation results of the effect of BHP on dimensional accuracy, wall-thickness reduction, forming pressure, material flow and defects (such as wrinkling and fracture) of specimens, the effect patterns of BHP load path on VPF ladder parts were explained. The limits of BHP corresponding to specimens with no defect and with wrinkling or fracture defect were determined. In the limits of formable BHP, the variable load path of BHP was beneficial to drawing blank into the die and decreasing wall-thickness reduction of specimens. The experimental results show that the ladder parts of good surface fineness and high dimensional accuracy can be obtained by variable load paths of BHP. |
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Keywords: | viscous pressure forming ladder parts blank holder pressure aluminum alloy |
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