摘要
为了研究压弯成形中回弹的预测方法,提高压弯成形的精度。采用解析法研究了压弯回弹预测问题。根据压弯件变形的特点,将压弯成形中弯曲板分为等曲率弹塑性段、弹塑性自由段、纯弹性自由段、无变形自由段。将弹塑性自由段、纯弹性自由段简化为悬臂梁结构,利用材料理想弹塑性模型,建立了相应的挠曲线数学模型,并对弯曲板的回弹分段进行了研究,给出了回弹解析的方法。研究结论为进一步进行压弯参数的确定和优化提供了理论依据。
In order to study springback prediction method and to raise forming precision for press bending,the springback prediction is researched by analytical method. Large curvature plane-bending curve can replace shape before unloading and be used to calculate springback. Based on deformation feature in press bending, large curvature plane-bending curve for press bending is separated into four parts： elastic-plastic segment with constant curvature, elastic-plastic segment, pure elastic segment and free deformation segment. The elastic-plastic segment and pure elastic segment are taken as two cantilever beams. The forrnulations for large curvature plane-bending curve are founded according to beam theory and ideal material model. All parameters in the formulations can be obtained by numerical method. The results can be used to determine and optimize parameters for press bending.
出处
《辽宁工程技术大学学报（自然科学版）》
CAS
北大核心
2008年第4期583-586,共4页
Journal of Liaoning Technical University (Natural Science)
基金
中国航空集团基金资助项目(2006ZE54)
辽宁省教育厅基金资助项目(20060654)
关键词
压弯
挠曲线
钣金成形
回弹
悬臂梁
press bending
deflection curve
sheet metal forming
springback
cantilever beam
