锻压技术

厚壁长套锻件成形技术分析与生产试制

英文标题：Forming technology analysis and production trail for thick-walled and long sleeve forgings

分类号：TG316

出版年,卷(期):页码：2022,47(7):34-41

摘要：

厚壁长套锻件由于内孔小、法兰直径大（孔径比小），且常规锻造时不涉及扩孔工序，在实际生产中极易产生端面凹心和偏心现象，导致锻件尺寸不满足工艺要求。通过综合分析厚壁长套类锻件“凹心和偏心”现象产生的原因，并结合实际生产中厚壁长套锻件拔长的控制情况，重点提出“镦拔下料+球面制坯+阶段变形量控制”综合控制法和偏心控制及矫正方法；并结合工艺性分析，建立有限元分析模型，重点模拟分析了不同孔径比对凹心的影响规律和阶梯-对称压下纠偏控制方法的可行性。最终，确定最佳工艺参数控制方法，并经过批量生产试制，验证了工艺参数及成形工艺的合理性。

Due to small inner hole and large flange diameter (small aperture ratio) of the thick-walled and long sleeve forgings and no reaming process involved in conventional forging, it was easy to produce end face concave and eccentric phenomenon in practical production, resulting in not meeting the process requirements of forgings size. Therefore, through the comprehensive analysis on the causes of “concave and eccentric” phenomenon for thick-walled and long sleeve forgings and combined with the drawing control condition of medium-thick-walled and long sleeve forgings in the practical production, the comprehensive control method with “upsetting drawing blanking + spherical billet making + stage deformation control” and the method of eccentricity control and correction were mainly proposed, and the finite element analysis model was established by combining with manufacturability analysis. Furthermore, the influence laws of different aperture ratios on the concavity and the feasibility of step-symmetric depression correction control method were simulated and analyzed emphatically, and the control method for optimal process parameters was determined. Finally, the rationality of process parameters and forming process was verified by batch production trial.

基金项目：

国家重点研发计划资助项目（2020YFB2008400）

作者简介：李春辉(1986-)，男，学士，工程师 E-mail：lichunhui258@sohu.com 通信作者：胡振志（1981-），男，硕士，工程师 E-mail：zhenzhi401@163.com

参考文献：

[1]丁明琦. 芯轴拔长变形规律及成形质量控制研究[D].济南：山东大学，2019.

Ding M Q. Study on Deformation Behavior and Quality Control of Mandrel Forging Process [D].Jinan：Shandong University，2019.

[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 F，Zhong Y X, Ma Q X, et al. Prevention of forging cracks in heavy hydro-generator shafts[J].Journal of Tsinghua University: Science and Technology，2008,48(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 Forgings，2014,（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]. Machinery，2000，(2):40-41.

[5]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，2009，（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，(2):69-71.

[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，（3）：50-54.

Dong L F，Zhong Y X，Ma Q X， et al. Numerical simulation research on final forging process of 700 MW class heavy hydro-generator shaft [J]．China Metalforming Equipment & Manufacturing Technology，2007,(3):50-54.

[7]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 Review，2008，(6):87-91.

[8]陈英，钟志平，边翊，等.核电压力壳锻件芯轴拔长工艺V砧砧角的常温模拟研究[J].塑性工程学报，2000，7(3)：52-56.

Chen Y，Zhong Z Y，Bian Y，et al. Modeling research on the anvil angle of mandral drawing for RPV forging at room temperature[J].Jouranl of Plasticity Eegineering, 2000，7（3）:52-56.

[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 Metals，2018，(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）：209-210.

Zhao H W. Process control points for free forging of flange parts [J]．Mechanical Engineering & Automation, 2018，(5):209-210.

[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：热加工，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，2000，29（1）：40-41.

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

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