基于椭圆热态胀形试验的板材成形极限图建立方法  

Establishment of sheet forming limit diagram based on elliptical warm hydrobulging test

作　　者：蔡高参[1,2] 陆建江 周晓军[2] 郎利辉[3] 

机构地区：[1]杰牌控股集团有限公司,浙江杭州311223 [2]浙江大学机械工程学院,浙江杭州310028 [3]北京航空航天大学机械工程学院,北京100191

出　　处：《锻压技术》2016年第5期29-32,共4页Forging & Stamping Technology

基　　金：国家重大基础研究项目(613152-06)

摘　　要：采用长轴直径为Φ100 mm、短轴直径分别为Φ100,Φ90,Φ80,Φ60和Φ40 mm的椭圆形胀形模具,在300,210和150℃、RT(常温)4个不同温度梯度,0.0045和0.045 MPa·s-1两个不同压力率条件下进行了铝合金板材的热态胀形试验,得到了胀形试验件,并获取了基础试验数据。利用极限应变计算公式,对胀形试验数据进行计算和整理,获得试验材料拉-拉变形区的成形极限曲线及成形极限图。结合等效条件下单向拉伸试验获取的基础试验数据,建立了完整的铝合金板材成形极限图。For the elliptic bulging dies with the long axis diameter Φ100 mm and the short axis diameter of Φ100,Φ90,Φ80,Φ60 andΦ40 mm respectively,the warm / hot sheet hydrobulging tests for aluminum alloy sheets were carried out at the different temperatures 300,210,150 ℃,and RT（ room temperature） as well as the different pressure rates 0. 0045 and 0. 045 MPa·s^-1. Then bulging samples and basic experimental data were obtained. Furthermore,forming limit curves（ FLCS） and forming limit diagrams（ FLDS） in tensile stress deformation zone were plotted by applying the calculation formula of ultimate strain to calculate and dispose the above experimental data.Combined with the basic experimental data obtained by uniaxial tensile test under the equivalent condition,a complete sheet metal forming limit diagram（ FLD） for aluminium alloy was established.

关 键 词：热态胀形试验 成形极限图 充液热成形 成形性能 

分 类 号：TG306[金属学及工艺—金属压力加工]