板材充液成形过程反胀效应影响因素  

Factors influencing inverse bulging effect in sheet hydroforming

作　　者：郎利辉[1,2] 王耀[1] 李奎[1] 孙志莹[1] 张泉达 

机构地区：[1]北京航空航天大学机械工程及自动化学院,北京100191 [2]北京航空航天大学先进航空发动机协同创新中心,北京100191

出　　处：《吉林大学学报（工学版）》2016年第5期1567-1576,共10页Journal of Jilin University:Engineering and Technology Edition

基　　金：国家科技重大专项项目(2014ZX04002041);国家自然科学基金项目(51175024)

摘　　要：研究了板材充液成形过程中影响反胀效应的因素。将反胀效应划分为初始反胀(IIB)和局部反胀(LIB)。IIB的主要参数为反胀高度率(HIb/t)和反胀压力率(pIb/t),LIB受到IIB的影响并且与成形过程中液室压力直接相关。通过数值模拟得到了半球底筒形件和平底筒形件的最优反胀参数,并优化了对反胀效应有较大影响的凸模与压边圈间隙以及压边圈入口圆角等工艺参数,使反胀效应在充液成形过程中发挥了更大的作用。最后,试验验证了数值模拟结果的正确性。The factors that influence the inverse bulging effect in sheet hydro-mechanical deep drawing are investigated.According to different inverse bulging processes,two modes can be singled：the Initial Inverse Bulging（IIB）and the Local Inverse Bulging（LIB）.IIB includes two parameters：inverse bulging height ratio（HIb/t）and inverse bulging pressure（pIb/t）.LIB is influenced by IIB and has a direct relationship with liquid chamber pressure in the forming process.The optimal inverse bulging parameters of hemispherical bottom cylindrical part and flat bottom cylindrical part are obtained by numerical simulation.The process parameters,including the clearance between the punch and blank holder,and the radius of the blank holder entrance,which strongly influence the inverse bulging effect,are optimized,so as to make the inverse bulging effect behave better in hydroforming process.The accuracy of the numerical simulation is verified by experiments.

关 键 词：材料合成与加工工艺 板材充液成形 反胀效应 凸模与压边圈间隙 压边圈入口圆角 

分 类 号：TG394[金属学及工艺—金属压力加工]