摘要
以某汽车减震器为例,通过分析零件结构,得出单道次不能成形的结论;于是采用多道次成形,根据成形理论基础,设计加工工艺过程,计算每道次材料的减薄率,提出每次减薄率分别为0.23、0.30、0.46的三道次成形策略。建立有限元模型进行数值模拟,比较分析厚度值,模拟厚度结果符合工艺设计最小壁厚0.7mm的要求。模拟证明了某汽车减震器多道次渐进成形方案设计的正确性,为渐进成形在侧壁较陡制件上的推广应用及多道次的工艺设计提供了一定的理论依据。
A car shock absorber structure was analyzed,and the answer was got that this part can＇t be made by one-step forming process.Then according to multi-step forming theory,the forming process was designed,the each step＇s thinning was calculated,the three-step toolpath method with each thinning of 0.23,0.3,0.46 was proposed.The finite element model was built to make numerical simulation,and the result showed that the numerical simulation thickness matched the designed requirement of the minimum thickness 0.7 mm.This confirms the validity of the proposed designed multi-step toolpath process,and which supplies the theory base for the application of incremental sheet forming in somewhat steep sidewall parts and process design in mulit-step toolpath.
出处
《热加工工艺》
CSCD
北大核心
2012年第1期63-66,共4页
Hot Working Technology
基金
国家自然科学基金资助项目(51005258)
关键词
渐进成形
多道次
减震器
数值模拟
incremental sheet forming
multi-step toolpath
shock absorber
numerical simulation
