抛物面形零件冲压成形悬空侧壁圆锥台变形区的应力应变计算  

Stress and Strain Calculation of the Floating Cone Sidewall Deformation Zone in Parabolic Shell Deep-Drawing

作　　者：孙丹阳[1] 雷君相[1] 

机构地区：[1]上海理工大学材料科学与工程学院,上海200093

出　　处：《上海理工大学学报》2015年第2期144-148,共5页Journal of University of Shanghai For Science and Technology

基　　金：上海市自然科学基金资助项目(06ZR14143);上海理工大学国家自然科学基金预研资助项目(14XPM11)

摘　　要：应力和应变的分布情况可以反映出零件在成形过程中的变形特点,它是研究零件冲压成形的基础.采用主应力法推导出了冲压成形过程中旋转抛物面形零件悬空侧壁圆锥台变形区的应力和应变计算公式,以材料为SS304不锈钢的抛物面形零件为算例,得出其应力和应变分布趋势.另外,还计算出了抛物面形零件冲压成形时的应力分界圆直径和应变分界圆直径,其中,应变分界圆直径的计算结果与已有实验数据一致.通过对旋转抛物面形零件冲压成形过程中悬空侧壁圆锥台变形区应力和应变分布的研究,明确零件的成形过程和变形特点,为其冲压成形时内皱曲极限的预报与控制奠定了基础.The distribution of stress and strain can reflect the characteristics of part deformation in the forming process. The stress and strain calculation formulas of the floating cone sidewall deformation of a parabolic shell during its deep-drawing process were given out by using the principal stress method. Taking stainless steel parabolic parts made of SS304 material as examples, the distribution trends were drawn. The stress dividing circle diameter and the strain dividing circle diameter were obtained and the calculated result of the strain boundary circle diameter is consistent with the existing experimental data. The studies on stress and strain can show the deformation characteristics in the forming process of parts clearly, and lay down the foundation for further study of prediction and control of the limit of wrinkle during parabola-shaped shell drawing.

关 键 词：抛物面形零件 悬空侧壁圆锥台变形区 应变 应力分界圆直径 应变分界圆直径 

分 类 号：TG386[金属学及工艺—金属压力加工]