筒形件冷挤压凹模强度设计及结构优化

发布时间：2018-03-09 19:38

本文选题：挤压凹模　切入点：强度设计　出处：《中国机械工程》2015年23期 　论文类型：期刊论文

【摘要】：基于厚壁圆筒理论,分析了整体式凹模工作载荷特点,讨论了单纯通过增加壁厚来提高模具强度的局限性。为提高承载能力,探讨了多层预应力组合凹模方案。基于第四强度理论,推导了n层组合凹模承受内压的数学表达式。采用Lagrange乘子法对组合凹模参数进行了优化设计,推导了n层组合凹模各层最佳径比分配、凹模极限内压、套缩界面残余压力及最优过盈量等设计变量的计算式。以三层组合凹模为算例,运用理论分析和数值模拟相结合的方法,对上述n层组合凹模的各设计变量计算式进行了验证,结果表明两者的结果吻合较好。
[Abstract]:Based on the theory of thick wall cylinder, the working load characteristics of integral die are analyzed, and the limitation of increasing die strength by increasing wall thickness is discussed. Based on the 4th strength theory, the mathematical expression of the internal pressure of the n-layer composite die is derived. The parameters of the combined die are optimized by Lagrange multiplier method. The formulas for calculating the optimum diameter ratio distribution of each layer of n-layer combined die, the limit internal pressure of the die, the residual pressure at the sleeve interface and the optimal interference amount are derived. Taking the three-layer combined concave die as an example, By using the method of theoretical analysis and numerical simulation, the formulas for the design variables of the n-layer combined die are verified, and the results show that the results are in good agreement with each other.
【作者单位】：合肥工业大学;
【基金】：国家自然科学基金资助项目(51275146) 教育部科学研究重大项目(311025) 安徽省自然科学基金资助项目(1208085ME71) 留学回国人员科研启动基金资助项目
【分类号】：TG376

【共引文献】