锻压技术

EPR水室封头拉深成形过程数值模拟及试验研究

英文标题：Numerical simulation and experimental research of drawing process of EPR water chamber head

作者：陈志英刘政磊任运来

单位：上海电机学院燕山大学

关键词：核电水室封头拉深有限元物理模拟

分类号：TG386

出版年,卷(期):页码：2014,39(6):128-131

摘要：

水室封头是核电蒸汽发生器的关键部件，水室封头零件带有2个管嘴和4个支承台，形状复杂，所以很难实现整体锻造。针对核电EPR带管嘴和支撑台的大型水室封头，提出了拉深成形工艺方案,设计了成形模具和初始坯料。采用数值模拟和物理模拟试验相结合的方法，研究了水室封头成形过程中的塑性变形规律和封头成形后的壁厚分布情况。结果表明，封头拉深成形后，壁厚最大减薄处位于球面区与直壁段过渡区域，直壁段外端壁厚略有增厚。

The water chamber head is the key part of nuclear power steam generator. Due to its complex shape with two nozzles and four supports, the integral forging process is more difficult to be realized. A deep drawing process was proposed for the nuclear power EPR large water chamber head with nozzles and supports. The corresponding dies and related billet were designed. Using a combination method of numerical simulation and physical simulation experiment, the plastic deformation law of drawing process and the wall thickness reduction distribution of deformed forging for water chamber head were analyzed. The results show that the maximum wall thickness thinning of deformed water head is located at the transition zone of the spherical area with a straight wall segment. The wall thickness of outer end of straight wall section is slightly thickened.

基金项目：

上海市育委员会科研创新项目(12YZ183)(12AZ02)；上海市教育委员会上海高校知识服务平台建设项目(ZF1225)

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