摘要
由于板材在单点渐进成形过程中受到非对称局部载荷作用,导致其成形区域容易出现回弹、壁厚不均匀以及变形状态难于控制等问题,在提出多点对称式渐进成形工艺的基础上,建立板材渐进成形的有限元模型,确定工具头的运动轨迹以及模拟实验参数。在MSC.MARC环境中对圆锥台制件进行单点渐进成形与多点对称式渐进成形实验,通过分析成形件的壁厚、等效塑性应变、变形抗力等参数的实验结果表明,与单点渐进成形工艺相比,多点对称式渐进成形工艺更有利于实现板材的精密成形。
As plate is forced by asymmetric local load during single point incremental forming process, it leads some problems, such as springback, uneven thickness and hardly controlled deformation state appears easilys. On the basis of multi-point symmetric type incremental forming process presented, some finite element models were built, and some tool-heads trajectory and simulation experiment parameters were defined; then deformation experiments of conical part were finished by single point incremental forming process and multi-point symmetry type incremental forming process, the experimental results of deformed part thickness, equivalent strain and deformation resistance indicate that the multi-point symmetric type incremental forming process is more helpful for realizing the plate precision forming com- pared with the single point incremental forming process.
出处
《锻压技术》
CAS
CSCD
北大核心
2012年第6期26-30,共5页
Forging & Stamping Technology
基金
国家自然科学基金资助项目(50975131)
关键词
多点对称
板材渐进成形
有限元模拟
multi-point of syrnmetry
plate forming
incremental forrning
finite element simulation
