Transactions of Materials and Heat Treatment

Title：Application of hot drawing process in thin-walled flange

Authors： Wang Jinpeng Dang En Yang Yongqiang Guan Zhen Chen Xiaoqing Kang Haipeng Wang Pinghuai Li Chao

Unit： Hot Working Branch Baoji Oilfield Machinery Co. Ltd.

KeyWords： thin-walled flange hot drawing process loose tooling forging mould design shunt surface

ClassificationCode：TG316.3;TG356.51

year,vol(issue):pagenumber：2022,47(5):45-51

Abstract：

In order to solve the problems of large machining allowance of inner hole and serious material waste for thin-walled flange forgings produced by ordinary loose tooling forging process, the forming characteristics of hot drawing process were analyzed theoretically, the metal filling law was summarized, and the main forming defects were predicted. Then, according to the theoretical analysis results, the blanking and forming moulds of thin-walled flange as well as hot drawing process were designed. Furthermore, the forming process was simulated by finite element simulation software, and the variation laws of velocity field and load in the deformation process were analyzed. After trial production, it is found that the appearance and sizes of flange products produced by the hot drawing process meet the process requirements. Compared with the ordinary loose tooling forging process, in the macroscopic aspect the blanking weight of the products produced by the hot drawing process is reduced by about 430 kg and the machining time is saved by about 20%. However, in the microscopic aspect, its internal structure is more fine and uniform, and through ultrasonic flaw detection, the internal quality is good and meets the design requirements. Thus, it provides a new method for the production of thin-walled flange.

Funds：

中国石油天然气集团有限公司关键核心技术攻关项目（2021ZG08）

作者简介：王金鹏（1986-），男，学士，工程师，E-mail：1091295398@qq.com

Reference：

[1]赵玉民，华林，胡亚民.带外台阶法兰环件轧制的变形规律研究[J].模具技术，2006,(2)：30-32.

Zhao Y M,Hua L,Hu Y M. Study on deformation rule of rolling of flange with outer step[J]. Die and Mould Technology,2006,(2):30-32.

[2]高东升. 高径薄壁法兰锻件的镦锻成形工艺与模具[J].机械工程与自动化，2017,(3)：123-124.

Gao D S. Upsetting forging process and die for a flange forging with high neck and thin wall [J]. Mechanical Engineering & Automation,2017,(3):123-124.

[3]丁泰然，胡成亮，赵震，等.管坯镦挤成形工艺成形极限的上限法分析[J].塑性工程学报，2019，26（4）：28-33.

Ding T R,Hu C L,Zhao Z,et al.Upper-bound analysis of forming limit of tube upsetting process [J].Journal of Plasticity Engineering,2019,26(4):28-33.

[4]王鑫，王强，张治民，等.薄壁筒形件累积镦挤成形法兰研究[J].轻合金加工技术，2020,48(6):42-46.

Wang X,Wang Q,Zhang Z M,et al.Research on cumulative upset extrusion flange of thin-walled tube[J].Light Alloy Fabrication Technology,2020,48(6):42-46.

[5]袁秦峰，梁必成，孙镭，等，钛合金变截面薄壁管流体力学成形工艺[J].锻压技术，2020,45（10）：80-85.

Yuan Q F,Liang B C,Sun L,et al.Hydromechanical forming process of titanium alloy thin-walled tubes with variable cross-section [J].Forging & Stamping Technology,2020,45(10):80-85.

[6]李昌义，胡振志，李春辉，等.特大型水电台阶法兰锻件工艺技术[J].锻压技术，2021，46（3）：37-42.

Li C Y,Hu Z Z,Li C H,et al.Process technology on extra-large hydropower stepped flange forgings [J].Forging & Stamping Technology,2021,46(3):37-42.

[7]胡朝备. 水室封头热拉深成形规律及工艺研究 [D].秦皇岛：燕山大学，2017.

Hu C B.Research on Hot Drawing Laws and Process of Water Chamber Head [D].Qinhuangdao:Yanshan University,2017.

[8]张国智. 大型封头热拉深力学机理及仿真研究[J].中国机械工程，2013，24（8）：1114-1117.

Zhang G Z.Study on mechanics mechanism and simulation of hot-drawing process of large head[J].China Mechanical Engineering,2013,24(8):1114-1117.

[9]周朝辉，曹海桥，吉卫.厚壁椭圆形封头热拉深成形及有限元模拟[J].热加工工艺，2004，33（9）：44-45.

Zhou C H,Cao H Q,Ji W.Hot drawing and finite element simulation of thick-wall ellipse end sochet[J].Hot Working Technology,2004,33(9):44-45.

[10]江学强，吉卫，曹海桥，等.厚壁筒形件热拉深成形数值模拟及工艺研究[J].热加工工艺，2014，43（11）：148-154.

Jiang X Q,Ji W,Cao H Q,et al. Numerical simulation and technical study of hot drawing forming thick-wall cylinder[J]. Hot Working Technology,2014,43(11):148-154.

[11]吕炎. 锻压成形理论与工艺 [M].北京：机械工业出版社，1991.

Lyu Y.Forging Forming Theory and Technology[M]. Beijing:China Machine Press,1991.

[12]张英杰，靳文德，马爱琴.法兰锻坯成型高度的确定[J].太原重型机械学院学报，1999，20（2）：131-133.

Zhang Y J,Jin W D,Ma A Q.Determination about forming height of flange froging blank [J]. Journal of Taiyuan Heavy Machinery Institute,1999,20(2):131-133.

[13]吕炎. 锻模设计手册 [M].2版.北京：机械工业出版社，2005.

Lyu Y.Design Manual of Forging Die [M].2nd Edition.Beijing:China Machine Press,2005.

[14]郑丽丽，彭军，安胜利,等，稀土Ce对贝氏体钢热处理组织和性能的影响[J].稀有金属，2020,44（11）：1191-1200.

Zheng L L，Peng J，An S L，et al. Heat treatment microstructure and properties of bainitic steel with addition of rare earth cerium[J]. Chinese Journal of Rare Metals,2020,44(11):1191-1200.

[15]GB/T 6394—2002, 金属平均晶粒度测定方法[S].

GB/T 6394—2002，Metal-methods for estimating the average grain size[S].

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