等厚面内弯曲成形机理及参数影响规律模拟  

Simulation of forming mechanism and influence of processing parameters in equal-thickness in-plane roll-bending

作　　者：冯璐[1] 李宏伟[1] 李云海[1] 杨合[1] 

机构地区：[1]西北工业大学材料学院,凝固技术国家重点实验室,西安710072

出　　处：《塑性工程学报》2014年第1期94-100,共7页Journal of Plasticity Engineering

基　　金：教育部"新世纪优秀人才支持计划"资助项目(NCET-13-0473)

摘　　要：文章提出采用一对对称共面平行布置的锥辊形成等厚辊缝,对等厚面内弯曲环形件进行成形的新方法。基于ABAQUS平台建立三维弹塑性有限元模型,对工艺成形过程进行模拟,分析成形机理及成形规律。结果表明,等厚面内弯曲的成形机理为,板带内外缘材料流动差异导致的不均匀伸长变形和板带中部材料在锥辊几何约束与面内弯矩共同作用下的不均匀变形协调。对于3A21O铝合金板带,成形参数显著影响等厚面内弯曲成形过程和成形结果,其影响程度顺序为放料位置z>板带宽厚比b0/t0>辊缝大小δ>摩擦系数μ。A new technology for forming equal-thickness in-plane bent ring parts is proposed. In the new technology, a pair of cone rollers is placed symmetrically with their axis coplanar and generatrices parallel. A 3I-）-FE elastic-plastic model of this form- ing process is established under ABAQUS environment to simulate and analyze the forming mechanism and rules. The results show that the forming mechanism of the equal-thickness in-plane roll-bending is the coordination of uneven elongation deformation of the inside and outside edges of strip and that in middle-width strip subjected to in-plane bending moment and geometric con straints by cone rollers. For aluminum alloys 3A210, the effects of the forming parameters are identified, and the sequence on effect significance of these parameters is illustrated as z〉b0/t0〉t〉μ.

关 键 词：等厚面内弯曲 有限元模拟 成形机理 变形协调 成形参数 

分 类 号：TG335.5[金属学及工艺—金属压力加工]