锻压技术

圆筒件再拉深性能的预测

英文标题：Prediction of cylinder re-drawing performance

作者：周小红

关键词：极限拉深比再拉深锥形凹模弯曲

分类号：TG113.26

出版年,卷(期):页码：2010,35(5):52-55

摘要：

通过分析圆筒件再拉深变形过程，运用主应力法、摩擦理论和板料弯曲理论，推导出极限拉深比的预测公式。对工业纯钛TA1圆筒件进行拉深成形试验，分析了平均厚向异性〖AKR-〗、摩擦系数μ、凹模半锥角α、凹模圆角rd、圆筒件壁厚比tmax/tmin等参数对再拉深性能的影响。结果表明：拉深试验预测值与实验结果相符合，极限拉深比随着平均厚向异性〖AKR-〗的增加呈线性增加，但随着摩擦系数μ、圆筒件壁厚比tmax/tmin的增加呈线性减小。

An equation was established to predict the limiting redrawing ratio of cylinder cup, which was based on the redrawing process, using slab method, friction theory and sheet bending/unbending theory around the die arc radius. Commercially pure titanium (TA1) cups were used for deep drawing experiments, and the effects of various parameters, such as average normal anisotropy 〖AKR-〗, friction coefficient μ, half die cone anger α, radius of the die arc rd, cup thickness ration tmax/tmin on redrawing were discussed. The results show that the calculation from the model is in good agreement with the experimental results by the experiments, and the limiting redrawing ratio increases linearly with R, but decreases almost linearly with μ and tmax/tmin.

基金项目：

参考文献：

［1］Whiteley R L. The importance of directionality in drawing quality sheet steel [J]. Trans. ASM.，1960, 52: 154-163.
［2］Mir W A, Hillier M J. Cup drawing from an anisotropic blank [J]. J. Eng. Ind. Trans. ASME.，1969, 89: 766-771.
［3］Shawki G S A. Assessing deep-drawing qualities of sheet metal[J]. Sheet Met. Ind.,1965,42: 417-424 .
［4］Akamatsu T, Ukita S, Miyasaka K,et al. Deep drawing of commercially pure titanium sheets [J]. ISIJ Int.,1995, 35: 56-62.
［5］Leu D K. The limiting drawing ratio for plastic instability of the cup-drawing process[J]. J. Mater. Process. Technol.,1999, 86: 168-176.
［6］Verma R K, Chandra S. An improved model for predicting limiting drawing ratio[J]. J. Mater. Process. Technol.,2006, 172: 218-224.
［7］陆文琼，陈劫实，陈军. 一种板料拉深性能的快捷解析预测方法[J].锻压技术, 2009, 34(2): 67-70.
［8］刘建华,王志恒. 平面压边拉深工艺参数对内皱影响及试验研究[J]. 锻压技术, 2008, 33(2): 50-53.
［9］杨建华，潘伟，何丹农,等. 板料多道次拉深成形规律和性能的研究[J]. 锻压技术, 2005, 30(5): 22-24.
［10］Hill R. The mathematical theory of plasticity[M]. Oxford: Clarendon Press, 1950.
［11］萧弗曼.冷压原理[M].北京：机械工业出版社，1957.

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