模具工作带及导流孔对铝棒挤压模拟的影响  

Influence of die bearing and flow-guiding hole on numerical simulation of aluminum alloy bar extrusion

作　　者：黎业生[1] 朱俊[1] 吴子平[1] 江亚龙 李玉昌[2] 李兵 

机构地区：[1]江西理工大学材料科学与工程学院,江西赣州341000 [2]新马精密铝业股份有限公司,安徽马鞍山243000

出　　处：《有色金属科学与工程》2016年第4期67-72,共6页Nonferrous Metals Science and Engineering

基　　金：国家科技部科技攻关项目(SQ2009GJC5005722)

摘　　要：利用有限元软件Deform-3D作为分析平台,对直径为22.5 mm的铝合金棒材的挤压过程进行数值模拟,研究模具工作带厚度及导流孔深度对挤压过程中金属流动、挤压载荷、温度及模具所受应力的影响.结果表明:在挤压工艺不变的情况下,工作带厚度从1.3 mm增加到1.7 mm可改善棒材表面质量,但同时会使挤压载荷提高30 k N、出料口温度提高7℃;导流孔深度从10 mm增加到20 mm,使挤压载荷提高90 k N、出料口温度上升至553℃,超过所允许的挤压温度上限.The extrusion process of an aluminum alloy bar with diameter of 22.5mm was simulated based on Deform-3D software. The effects of the thickness of die bearing and the depth of flow-guiding hole on metal flow behavior, extrusion load, temperature and die stress were analyzed. The results show that surface quality of extruded bar is getting better as the thickness of die bearing increasing from 1.3 mm to 1.7 mm under the same extrusion condition, however the extrusion load rises by 30 kN and the outlet temperature increases by 7℃ simultaneously. As the depth of flow-guiding hole increases from 10 mm to 20 mm the extrusion load increases by 90 kN and the outlet temperature rises to 553 ℃ which exceeds the extrusion temperature limit.

关 键 词：DEFORM-3D 铝合金棒材 有限元模拟 挤压 

分 类 号：TG375[金属学及工艺—金属压力加工]