|
基于连续挤压的黄铜合金成形过程的数值模拟
|
|
英文标题：Numerical simulation of deformation process of brass alloy based on continuous extrusion |
|
作者：李冰 宋宝韫 运新兵 |
|
单位：大连交通大学连续挤压工程研究中心 |
|
关键词：黄铜合金 连续挤压 数值模拟 |
|
分类号：TG379 |
|
出版年,卷(期):页码：2010,35(2):59-62 |
|
摘要：
|
|
针对黄铜合金连续挤压成形过程中存在变形抗力大、成形不稳定等问题,本文应用有限元法模拟分析了H62黄铜合金连续挤压应力应变场、温度场和流动速度场分布规律。模拟结果表明,成形温度达到了铜合金再结晶温度以上,模具口处应力集中、速度差大,降低该处的成形阻力将对黄铜合金稳定成形十分有利。黄铜合金连续挤压成形实验验证了数值模拟分析结果。
|
|
Aiming at the problems of large deformation resistance,instability forming etc.exist in the process of continuous extrusion for brass alloys,the stress-strain field,temperature field and flow velocity field distribution rules of the H62 brass alloy were analyzed by three-dimensional finite element method.Simulation results show that the forming temperature above the recrystallization temperature,the stress concentration is presented at die outlet position and flow velocity difference is large.Reducing the resistance in this position will be very favorable for the brass alloy stable forming.The numerical simulation analysis was verified by the continuous extrusion experiment.
|
|
基金项目：
|
|
国家自然科学基金重点资助项目(50635020)
|
|
作者简介：
|
|
|
|
参考文献：
|
[1]吴朋越,谢水生,鄢明,等.铜扁线连续挤压过程温度场的数值模拟[J].锻压技术,2007,32(3):46-49.
[2]和优锋,谢水生,程磊,等.CPU散热片挤压过程的数值模拟与模具优化[J].锻压技术,2009,34(4):126-129.
[3]刘明月,宋宝韫,运新兵,等.基于有限元法的铜母线连续挤压扩展成形过程的数值模拟[J].热加工工艺,2008,37(17):72-75.
[4]Kim Y H,Cho J R,Jeong H S,et al.A study on optionaldesign for CONFORM process[J].Journal of Materials Pro-cessing Technology,1998,80:671-675.
[5]Cho J R,Jeong H S.Parametric investigation on the surfacedefect occurrence in CONFORM process by the finite elementmethod[J].Journal of Materials Processing Technology,1999,30:609-735.
[6]王延辉,龚冰,李冰.H65黄铜合金热变形流变应力特征研究[J].塑性工程学报,2008,15(6):113-117.
[7]龚冰,王延辉,李冰.基于连续挤压的黄铜合金热变形行为研究[J].热加工工艺,2008,37(6):25-26,37.
[8]隋贤,宋宝韫,李冰,等.H65黄铜合金连续挤压过程中的组织和性能演变特征[J].中国有色金属学报,2009,19(6):1049-1054.
|
|
服务与反馈：
|
|
【本网站尚未开通全文下载服务】【加入收藏】
|
|
|
|
