锻压技术

封头沉底盆的锻造拉伸工艺

英文标题：Forging stretch process for head sink basin

作者：胡照海

单位：四川工程职业技术学院

分类号：TG31

出版年,卷(期):页码：2017,42(3):20-26

摘要：

针对核电整体封头锻造过程中存在的拉伸变形问题，结合应力、应变研究，分析了在变温状态下锻造封头沉底盆的拉伸问题，总结了封头最终应变特性和静水压力分布规律及“拉伸凸台”、“底部变薄”的原因，提出了“镦粗制饼制盆平整制盆平整拉伸”的解决方案。通过对720，760和800 mm不同拉伸量对比研究，得出760 mm左右的拉伸量对改善封头厚度不均匀起到了一定的作用，改善了封头受力情况与机械加工工艺性，本研究成果应用于AP1000核电容器顶盖锻件、CPR1000水室封头取得了圆满成功。

For the problem of stretch deformation in the forging process of integral head for nuclear power, the stretch process of head sink basin was analyzed under the changing temperature from the perspective of the stress and strain. Then, it was summarized that the head final strain characteristics, the static water pressure distribution law and the reason of “stretch convex platform” and “bottom thinning”. A solution was put forward as “upsetting cake-first forming basin-correct-second forming basin-correct-stretch”. Through the comparative study on the 720, 760 and 800 mm stretch values, the result shows that 760 mm stretch value can improve the uneven head thickness, the head stress distribution and mechanical processing. Thus, AP1000 nuclear power vessel lid forgings and CPR1000 water chamber head are produced successfully based on the above research result.

基金项目：

国家科技支撑计划(2007BAF02B01)

胡照海（1965-），男，硕士，副教授

参考文献：

［1］赵晨阳,李洪波,韩金成,等. 花键轮精密锻造成形的数值模拟及实验研究[J]. 锻压技术, 2016, 41(1):11-15.Zhao C Y, Li H B, Han J C, et al.Numerical simulation and experimental research on precision forging for spline gear[J].Forging & Stamping Technology, 2016, 41(1):11-15.
［2］郭改丽, 程巩固, 安红萍,等. 大型带法兰封头整锻成形工艺数值模拟[J].大型铸锻件,2010,(2):1-4.Guo G L, Cheng G G, An H P, et al. Big flanged head the whole forging forming process numerical simulation [J]. Heavy Castings and Forgings, 2010, (2) : 1-4.
［3］朱宇.核电机组中压力容器厚壁法兰封头成形工艺研究[D]. 大连：大连理工大学, 2008.Zhu Y. Thick Wall Pressure Vessel in Nuclear Power Unit Flange Head Forming Technology Research [D]. Dalian: Dalian University of Technology, 2008.
［4］马维金, 黄彬城, 包志家,等. 基于PSD的某轻卡汽车变速箱振动噪声特性分析[J]. 机械传动, 2014,(4):123-126.Ma W J, Huang B C, Bao Z J, et al. A light truck vibration noise characteristics of automobile gearbox based on PSD analysis [J]. Journal of Mechanical Transmission,2014,(4):123-126.
［5］王方,李鑫,鲁世强,等.变形态Ti40合金的高温流变应力模型研究[J]. 锻压技术, 2012, 37(2):134-138.Wang F, Li X, Lu S Q, et al. Study on flow stress model of deformed Ti40 alloy at high temperature [J].Forging & Stamping Technology, 2012, 37(2):134-138.
［6］任运来,聂绍珉.大型封头整体锻造新方法研究[J].重型机械, 2000,(5):20-22.Ren Y L, Nie S M. Big head integral forging new method research [J]. Heavy Machinery，2000,(5):20-22.
［7］张海龙,刘劲松,王守东,等.304L碟形封头冲压回弹研究[J]. 锻压技术,2016,41(1):43-47.Zhang H L, Liu J S, Wang S D, et al. Research on springback of dished head 304L[J].Forging & Stamping Technology, 2016,41(1):43-47.
［8］马春宇,袁军平,薄海瑞.热处理工艺对Cr12MoV精密冷锻模具钢组织和性能的影响[J].热加工工艺,2012, 41(20):152-154.Ma C Y, Yuan J P, Bo H R. Effect of heat treatment process on microstructure and properties of Cr12MoV precision cold forging die steel [J]. Hot Working Technology, 2012, 41 (20): 152-154.
［9］刘军辉,王晖,叶鼎.汽车发动机罩内板的成形数值模拟及工艺优化[J].锻压技术,2012,37(1):60-64.Liu J H, Wang H, Ye D. Forming numerical simulation and optimizing process parameters of automotive engine hood inner panel[J]. Forging & Stamping Technology, 2012, 37(1):60-64.

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