锻压技术

基于Deform-3D的AZ31镁合金自行车曲柄等温闭式锻造过程的数值模拟

英文标题：Study on numerical simulation of AZ31 magnesium alloy bike crank isothermal

作者：张祎王其军王磊刘化民

分类号：TP391

出版年,卷(期):页码：2011,36(6):133-136

摘要：

通过对镁合金自行车曲柄等温闭式锻造过程进行数值模拟，揭示自行车曲柄锻造变形过程中的金属流动规律，分析速度场和凸模行程载荷曲线的特点。其成形过程分为4个阶段:弯曲变形阶段、杆身压扁阶段、填充型腔阶段和最终成形阶段。研究了温度及工作速度对镁合金等温锻造过程的影响，结果显示，在350℃左右的等温环境，凸模的工作速度为3 mm·s-1左右较适合镁合金自行车曲柄等温闭式锻造。

Based on rigid and plastic FEM, magnesium alloy bike crank isothermal closed-die forging was simulated , the metal flowing rule in the bike crank forming process was revealed, and the characteristics of velocity field and curve of distance -load was analyzed. The process of the forging could be expressed in four stages of bending deformation, compressing deformation, die filling deformation and finish-forging deformation. Different temperatures and speeds influenced the process of magnesium alloy forging was studied，and magnesium alloy bike crank isothermal closed-die forging was suitable to be done at 3mm·s-1 of punch in 350 ℃ isothermal environment.

基金项目：

国家自然科学基金资助项目（50775098）

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