一种新型Al-Zn-Mg-Cu合金杯形件摆辗成形数值模拟及实验研究  

Numerical Simulation and Experimental Study on Rotary Roll Forging for a New Al-Zn-Mg-Cu Alloy Cup

作　　者：马俊林[1] 高仕恒 李萍[1] 薛克敏[1] 

机构地区：[1]合肥工业大学,合肥230009

出　　处：《中国机械工程》2016年第7期970-975,共6页China Mechanical Engineering

基　　金：国家自然科学基金资助项目(51575153);教育部新世纪优秀人才支持计划资助项目(NCET-13-0765)

摘　　要：为了研究摆辗成形工艺对一种新型Al-Zn-Mg-Cu合金杯形件力学性能的影响,对初始高径比分别为0.4、0.8和1.2的坯料摆辗成形进行数值模拟和实验研究。通过有限元法模拟摆辗成形过程中坯料的金属流动、等效应变分布和温度分布,并在此基础上进行摆辗成形实验,分别测试杯形件底盘弦向和径向的强度。有限元研究发现,与摆头接触的变形区域网格畸变量大,并且变形过程热效应明显。研究结果表明,当坯料高径比为0.8时,杯形件的底盘弦向强度可达到507MPa,比母材提高了64.4%;摆辗成形可以提高该新型Al-Zn-Mg-Cu合金杯形件的底盘强度,同时初始坯料的高径比对杯形件底盘的强度分布影响较大。In order to study the influences of mechanics properties of a new Al-Zn-Mg-Cu alloy cup formed by rotary roll forging,the initial height-diameter ratios of 0.4,0.8and 1.2cylinders deformation were researched by numerical simulation and experiments.The metal flow,equivalent strain and temperature distribution of the cylinders in the process of rotary roll forging were simulated by FEM.Then the corresponding experiments were carried out,and the tangential and radial mechanics properties in the cup chassis were tested respectively.It is found by FEM analyses that,the amount of grid distortion in the area contacted with top die is larger than others.And the thermal effects in the forming process are obvious.The results show that,when height-diameter ratio of initial cylinder is 0.8,the strength in cup chassis comes to 507 MPa,which increases 64.4% compared with the base metal strength.The strength in chassis of the new Al-Zn-Mg-Cu alloy cup may be improved by the isothermal rotary roll forging.Meanwhile,the height-diameter ratio of initial cylinders can affect the chassis strength greatly.

关 键 词：AL-ZN-MG-CU合金 高径比 摆辗成形 数值模拟 

分 类 号：TG306[金属学及工艺—金属压力加工]