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摘要：
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采用三维刚塑性有限元软件DEFORM-3D对带支撑台的大型厚壁半球形封头的热拉伸工艺进行模拟,研究了拉伸过程中板坯变形特点,获得了成形后封头壁厚分布规律。定量分析了摩擦系数、凹模下圆角半径、凸凹模间隙、毛坯板形等参数对壁厚的影响,确定了合理的工艺参数。在3150 t水压机上进行了1∶3的验证试验,并对试件进行了测量。结果表明,有限元分析计算与试验结果相比误差不超过5%。
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Three-dimension rigid-plastic finite element software,DEFORM-3D,was used to simulate the hot forming processing of lager thick-wall semi sphere head with supporting tables.The deformation characteristics of the blank were researched and the regulation of wall thickness distribution was obtained.Friction coefficient,radius of lower corner of female die,clearance of male and female die and blank shape were analyzed quantitatively and the rational processing parameters were determined.The 1∶3 scale experiment was done in 3150t hydraulic press and the test piece was measured.The result shows that the error between simulational and testing data is less than 5%.
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基金项目：
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山西省教育厅高新技术产业化项目(20080023);;
国家“十一五”科技支撑计划项目(2007BAF02B07)
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作者简介：
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参考文献：
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[1]夏春申,徐贵珍.厚壁半球形封头及大中型中厚椭圆封头冲压工艺探讨[J].压力容器,1997,(6):72-75.
[2]俞汉清,陈金德.金属塑性成形原理[M].北京:机械工业出版社,1993.
[3]陈书贵.核电站反应堆压力容器和制造工艺[J].大型铸锻件,1994,(2):25-34.
[4]中国机械工程学会锻压学会编.锻压手册:冲压[M].2版.北京:机械工业出版社,2001.
[5]马飞良.国外核反应堆压力容器用A508-3钢及制造[J].大型铸锻件,1993,(4):35-37.
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