Transactions of Materials and Heat Treatment

Title：Drawing and retract hole forming technology for DN1800 overall pipe mould

Authors： Guo Ruitao Hu Zhenzhi Jin Ming Yu Baoning Li Chunhui Guo Weidong Yang Gehui

Unit： Luo Yang CITIC HIC Casting & Forging Co. Ltd. CITIC Heavy Industries Co. Ltd.

KeyWords： DN1800 overall pipe mould drawing retract hole forming reduction amount anvil amount rotation angle

ClassificationCode：TG316

year,vol(issue):pagenumber：2022,47(11):70-77

Abstract：

DN1800 extra-large overall pipe mould forgings has relatively small wall thickness, large specification, heavy tonnage, many heat treatment times, low drawing efficiency and high technical requirements, and the existing production tooling and auxiliary tools do not match. It is extremely difficult in process design, quality control and production organization. Therefore, by studying the mechanism and process of drawing forging，the process scheme of control drawing and control pressure, the drawing efficiency improvement control scheme and the process scheme of mandrel drawing of Φ1900 mm + retract hole forming with upper flat and lower V-shaped anvil + compound retract hole forming upper arc of Φ2200 mm and lower V-shaped anvil were proposed, and combined with the process analysis, a finite element analysis model of plastic deformation was established. Furthermore, the process parameters were continuously optimized. By proposing key points of production operations, refining the process parameters of retract hole and strictly matching control of anvil amount, reduction amount, temperature and rotation angle, the trial production of extra-large overall pipe mould was successfully completed to verify the rationality of process parameters and forming processes, which accumulated the experience in special forging and forming of extra-large overall pipe mould.

Funds：

国家重点研发计划资助项目（2020YFB2008400）

作者简介：郭锐涛(1985-)，男，学士，工程师，E-mail：hngrt@163.com；通信作者：胡振志（1981-），男，硕士，工程师，E-mail：zhenzhi401@163.com

Reference：

[1]吕炎. 锻造工艺学[M]. 北京:机械工业出版社，1995.

Lyu Y. Forging Technology[M].Beijing: China Machine Press,1995.

[2]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.

[3]YB/T 4179—2008,水冷金属型离心铸造球墨铸铁管管模[S].

YB/T 4179—2008,Water-cooled metallic tube mould for centrifugal ductile iron pipe[S].

[4]GB/T 6402—2008，钢锻件超声检测方法 [S].

GB/T 6402—2008，Steel forgings—Method for ultrasonic testing [S].

[5]GB/T 10561—2005，钢中非金属夹杂物含量的测定—标准评级图显微检验法[S].

GB/T 10561—2005，Steel—Determination of content of nonmetallic inclusions—Micrographic method using standards diagrams[S].

[6]郭卫东, 胡振志,任增海,等.提高DN1000管模锻造拔长效率的方法[J].模具工业，2016，42（6）：55-58.

Guo W D, Hu Z Z,Ren Z H,et al. Methods for improving drawing efficiency of DN1000 tube sheet[J]．Die & Mould Industry, 2016，42（6）：55-58.

[7]胡振志，梁晓朋，董文斐，等.薄壁长套锻件拔长影响因素分析[J].模具工业，2016，42（4）：54-56.

Hu Z Z, Liang X P, Dong W F,et al. Research on stretching of the large tube sheet with thin-wall [J]．Die & Mould Industry, 2016，42（4）：54-56.

[8]郭卫东，胡振志，孙统辉，等.DN2000特大型管模整体锻造成形技术研究[J].热加工工艺， 2018，47（19）：159-161.

Guo W D,Hu Z Z，Sun T H,et al. Research on integral forging technology of DN2000 extra-large tube die [J]．Hot Working Technology, 2018，47（19）：159-161.

[9]孙丽杰，杨峰，张兴铎. 管模内壁裂纹原因分析[J].一重技术，1998，(1):62-63.

Sun L J,Yang F，Zhang X D. The cause analysis of inner hole of the tube sheet[J].CFHI Technology,1998,(1):62-63.

[10]许四海. 管模工艺的优化[J]. 大型铸锻件，2005，(4):37.

Xu S H.The optimization of the tube mold technology [J]．Heavy Casting and Forging,2005，(4):37.

[11]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′an：Northwestern Polytechnical University，2002.

[12]左旭. 复杂体积成形三维有限元仿真的关键技术[J].金属学报, 1999,5(3): 325-329.

Zuo X. The key techniques of 3D FEM simulation in bulk forming[J].Acta Metallrugica Sinica,1999，5（3）：325-329.

[13]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.

[14]胡振志，郭卫东，肜亮，等.DN2000特大型整锻管模成形仿真分析与试验研究[J].模具工业，2017，43（11）:23-27.

Hu Z Z,Guo W D,Rong L,et al. Simulation analysis and experiment research of forging processes for DN2000 tube sheet [J].Die & Mould Industry, 2017，43（11）：23-27.

[15]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 P，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.

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