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特大型水电台阶法兰锻件工艺技术
英文标题:Process technology on extra-large hydropower stepped flange forgings
作者:李昌义 胡振志 李春辉 郭卫东 陈朝阳 王念锁 
单位:1.洛阳中重铸锻有限责任公司 2.中信重工机械股份有限公司 
关键词:法兰锻件 分段扩孔 实心制坯 金属流动 有限元模拟 
分类号:TG316
出版年,卷(期):页码:2021,46(3):37-42
摘要:

 Φ4160 mm特大型水电台阶法兰锻件的吨位重、规格大、法兰直径及相邻截面差大,采用传统的芯棒直接卡台+分段扩孔成形法很难保证最终成形尺寸。通过综合分析特大型水电台阶法兰类锻件的关键成形方法和控制难点,创新锻造工艺,首次提出了“实心制坯+分段扩孔成形”的控制新方法;确定实心制坯环节采用带钳把卡台锻造,且下料后增加平整端面工序,分段扩孔环节的压下量按照30~45 mm控制,且每火次扩孔后增加收孔工序;并结合工艺性分析,建立了塑性有限元和结构有限元分析模型,仿真并分析了实心制坯和分段扩孔过程的金属流动规律、金属流动速率及各部位的金属流动速度差,预测了新方案的工艺参数和过程控制,以及实心制坯、分段扩孔的成形效果和质量。通过生产试制,验证了该工艺参数及成形工艺的合理性。

 The extra-large hydropower stepped flange forgings with Ф4160 mm have heavy tonnage, large specifications, large flange diameter and difference in adjacent cross-sections, and it is difficult to guarantee the final sizes using traditional method of ingot blanking, mandrel drawing with clamping table and reaming. Therefore, a new control method of “solid step billet+stepped reaming” was proposed for the first time by comprehensive analysis of key forming methods and control difficulties of the extra-large hydropower stepped flange forgings to innovate the forging process, it was determined that the solid billet was forged on the clamping table with pliers, and then the flattening process of end surface was added after blanking. In addition, the reduction of stepped reaming was controlled between 30 and 45 mm, and the hole shrinkage process was added after reaming for each fire. Combined with the process analysis, the analysis models of plastic finite element and structural finite element were established, and the metal flow laws, the metal flow rate and the metal flow velocity difference of each part for  solid billet and stepped reaming were simulated and analyzed to predict the new process parameters, the process control, the effect and quality of solid billet and stepped reaming. At last, the rationality of process parameters and forming process were verified by production test.

基金项目:
作者简介:
李昌义(1981-),男,博士,高级工程师 E-mail:change371@163.com 通讯作者:胡振志(1981-),男,硕士,工程师 E-mail:zhenzhi401@163.com
参考文献:

 [1]田仲可.薄壁结构件塑性成形技术研究[D].西安:西北工业大学,2002.


 


Tian Z K.A Study of the Plastic Forming Technology of Thin-walled Structural Components[D].Xi′anNorthwestern Polytechnical University2002.


 


[2]董岚枫,钟约先,马庆贤,等.大型水轮机主轴锻造过程裂纹缺陷的预防[J].清华大学学报:自然科学版,2008,48(5):765-768.


 


Dong L FZhong Y X, Ma Q X, et al.Prevention of forging cracks in heavy hydro-generator shafts[J].Journal of Tsinghua UniversityScience and Technology2008,48(5):765-768.


 


[3]孟相利,赵欣.大型空心法兰锻造成形新工艺[J].大型


 


铸锻件,2014,(5:39-40.


 


Meng X L, Zhao X.New forge process for large hollow flange[J].Heavy Castings and Forgings2014,(5:39-40.


 


[4]张英杰.法兰锻件制坯问题探讨[J].机械,2000(2):40-41.


 


Zhang Y J.Discussion on blanking of flange forgings[J].Machinery2000(2):40-41.


 


[5]陆璐,王辅忠,王照旭.有限元方法在金属塑性成形中的应用[J].材料导报,2008(6):87-91.


 


Lu L, Wang F Z, Wang Z X.Application of finite element method in metal plastic forming[J].Materials Review2008,(6):87-91.


 


[6]董岚枫,钟约先,马庆贤,等.700 MW级水轮机主轴内法兰终锻成形工艺数值模拟研究[J].锻压装备与制造技术,2007, 42(3)50-54.


 


Dong L FZhong Y XMa Q Xet al.Numerical simulation research on final forging process of 700 MW class heavy hydro-generator shaft[J].China Metalforming Equipment & Manufacturing Technology2007, 42(3):50-54.


 


[7]张晓燕,许树勤,刘应忠,等.耐腐蚀高颈法兰胎膜锻造成形的数值模拟[J].锻压装备与制造技术,200944(2)69-71.


 


Zhang X Y, Xu S Q, Liu Y Z, et al.Numerical simulation of die forging for corrosion resistant hubbed flange[J].China Metalforming Equipment & Manufacturing Technology, 2009,44(2): 69-71.


 


[8]汤速,许树勤,刘杰.环件轧制锻透条件有限元模拟及实验研究[J]. 锻压装备与制造技术,200944(4)62-64.


 


Tang S, Xu S Q, Liu J. Finite element simulation and experimental study on forged ring rolling conditions[J]. China Metal Forming Equipment & Manufacturing Technology, 2009,44 (4): 62-64.


 


[9]吴金波.法兰锻件的工艺研究[J].世界有色金属,2018(16)193-194.


 


Wu J B.Research on flange forgings for flange forgings[J].World Nonferrous Metals2018,(16):193-194.


 


[10]赵宏伟.法兰锻件自由锻工艺过程的控制要点[J].机械工程与自动化,2018(5)208-210.


 


Zhao H W.Process control points for free forging of flange parts[J].Mechanical Engineering& Automation, 2018, (5): 208-210.


 


[11]任秀凤,牛余刚.大型海上风电塔架法兰锻件制造技术[J].金属加工,2016(11)41-42.


 


Ren X F, Niu Y G.Manufacturing technology of flange forgings for large offshore wind power tower[J].MW Metal Forming,2016(11):41-42.


 


[12]李连生,李良福.用径向挤压法制造大法兰锻件的研究[J].热加工工艺,200029(1)40-41.


 


Li L SLi L F.Study of big flanged forgings stamping by cross extrusion[J]Hot Working Technology, 2000,29(1):40-41.

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