模具结构对铝合金挤压的影响机理  

The Influence Mechanism of Die Structure on Metal Flow in Aluminium Alloy Extrusion

作　　者：徐明达[1,2] 李峰[2] 刘晓晶[2] 李超[2] 王敬泽[2] 

机构地区：[1]齐齐哈尔高等师范专科学校理工系,黑龙江齐齐哈尔161005 [2]哈尔滨理工大学材料科学与工程学院,哈尔滨150040

出　　处：《机械工程师》2010年第3期83-84,共2页Mechanical Engineer

基　　金：黑龙江省教育厅科学技术研究面上项目(11541042)

摘　　要：对不同模角挤压过程进行了数值模拟,研究了成形过程中金属的变形流动规律,并利用应力场特征量进行了变形分区及应力应变分析。结果表明:随着模角的增大,塑性区的范围明显缩小。揭示了不同的变形条件,改变了筒内应力应变的分布关系,是影响金属变形流动行为的内因所在。Numerical simulations on extrusion with different die angles were carried out, the rule of metal flowing was investigated by simulation, and deformation zones the division proposed by employing the characteristic quantity, and stress-strain was analyzed during the forming process. The results show that the plastic zones decreases significantly with die angle increasing.

关 键 词：模角 挤压 变形流动 应力应变 

分 类 号：TG37[金属学及工艺—金属压力加工]