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）

参考文献：

[1]Yo Kojima, Shigeharu Kamado Fundamental Magnesium researches in Japan[J]. Materials Science Forum,2005,488489: 9-16.

[2]Zhang P, Lindemann J. Influence of shot peening on high cycle fatigue properties of the high-strength wrought magnesium alloy AZ80[J] . Scripta Materialia, 2005, 52: 485-490.

[3]Mordike B L, Ebert T. Magnesium: Properties-applications-poten-tial[J]. Materials Science Engineering A, 2001,302:37-45.

[4]Ogawa N, Shiomi M, Osakada K. Forming limit of magnesium alloy at elevated temperatures for precision forging[J] .Mater1 Sci. Forum, 2002, 42: 607614.

[5]杜海威, 刘凯泉, 郭义. DEFORM 软件在加工制造业中的应用[J].一重技术, 2008, 123 (3) :103-105.

[6]张昌明, 张会. 采用DEFORM-3D 对2A12铝合金锻造变形的模拟研究[J] . 锻压技术, 2009, 34 (6) : 140-142.

[7]Satisha G D, Singhb N K, Ohdarb R K. Preform optimization of pad section of front axle beam using DEFORM[J] .Journal of Materials Processing Technology, 2008, 203:102-106.

[8]Xu Yongchao,Zhang Shihong, Liu Huamin. Improved formability and deep drawing of cross-rolled magnesium alloy sheet at elevated temperatures[J]. Materials Science Forum,2005,488489： 461-464.

[9]王忠堂，张士宏,齐广霞,等. AZ31镁合金热变形本构方程[J]. 中国有色金属学报, 2008, 18 (11) : 24-28.

[10]王智文,张治民,王强. AZ31 变形镁合金等温变形力学特性的研究[J]. 机械工程与自动化,2005,(1):41-44.

[11]王其军.AZ31镁合金自行车曲柄等温闭式锻造数值模拟研究[D]. 吉林：吉林大学, 2008.

服务与反馈：

【文章下载】【加入收藏】