王昶胡亚民：镁合金射钉枪端盖等温体积成形及数值模拟.doc

..页眉.. 页脚.. 镁合金射钉枪端盖等温体积成形及数值模拟重庆工学院汽车学院王昶重庆工学院材料科学与工程学院胡亚民赖周艺摘要针对射钉枪端盖零件,设计了等温挤压成形工艺和等温挤压试验模具。并利用 DEFORM-3D 对成形过程进行数值模拟, 预测了射钉枪端盖零件成形力为 90KN 以及成形过程分为 5 个阶段。采用 YAW-500kN 微机控制电液伺服压力试验机进行挤压试验, 试验证明所设计的成形方案合理可行,同时也验证了数值模拟分析的正确性。关键词: 射钉枪端盖; 体积成形; 等温挤压; DEFORM-3D ; 数值模拟; 镁合金 AZ31D Isothermal bulk forming study and simulation of magnesium alloy for cover of nail gunshot machine Abstract The techniques of Isothermal extrusion and Isothermal extrusion mould were Designed for the part of cover of nail gunshot machine. The deformation process was simulated with finite element method software-DEFORM-3D, The force of deformation for the part of cover of nail gunshot machine was predicted is 90 KN, and the deformation process was divided five phases. The Isothermal extrusion was processed by the pressure machine-YAW-500kN. The project of deformation and the correctness of simulation analysis were verified in reason by the process experiment. Keywords : Cover of Nail Gunshot Machine ; Bulk Forming ; Isothermal extrusion DEFORM-3D Numerical Simulation ; AZ31D Magnesium Alloy 1 引言镁合金是实际应用中最轻的金属结构材料,镁合金具有比重小,比强度、比刚度高,切削加工性、导热性好,电磁屏蔽能力强,尺寸稳定,资源丰富,易回收,无污染等优点,因此,在汽车、通信电子和航空航天工业等领域正得到日益广泛的应用,近年来全世界镁合金产量的年增长率高达 20 %,显示出了极为广泛的应用前景[1-3] 但与铝合金相比,镁合金的研究和发展还很不充分,镁合金的应用也还很有限。目前, 镁合金的产量只有铝合金的 1 %。镁合金作为结构应用的最大用途是铸件,其中 90 %以上是压铸件[3]。镁合金可分为铸造镁合金和变形镁合金。变形镁合金在强度和延伸率方面均优于压铸镁合金,前者比后者的性能要高出 30% -50 %, 用变形镁合金制造零件可以