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3mm.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 3 mm·s-1 of punch in 350 ℃ isothermal environment.
出处
《锻压技术》
CAS
CSCD
北大核心
2011年第6期133-137,共5页
Forging & Stamping Technology
基金
国家自然科学基金资助项目(50775098)
关键词
AZ31镁合金
自行车曲柄
等温闭式锻造
数值模拟
AZ31 magnesium alloy
bicycle crank
isothermal closed-die forging
numerical simulation
