Transactions of Materials and Heat Treatment

Title：Automatic closed hot extrusion process of cone hole forging

Authors： Yan Hongyan Xu Chao Wang Zhike Xie Tan Guo Yongqiang

Unit： Beijing Research Institute of Mechanical & Electrical Technology

KeyWords： anchor sleeve hot extrusion coaxiality wear automation

ClassificationCode：TG316

year,vol(issue):pagenumber：2017,42(4):109-116

Abstract：

For the typical parts of anchor sleeve for anchoring device, an automatic hot extrusion process was designed. The instable forging quality and short die lifetime during the production hindered the realization of automated production. The performance of quality instability was the coaxiality of big tolerance and not regular in the forging. Then, the influences of pre-forging coaxiality on the equivalent stress and offset of forming punch were simulated and analyzed. Therefore, the problem of coaxiality was solved by improving the blank size accuracy and adjusting the upsetting height, and its coaxiality was reduced from Φ0.86 mm to Φ0.4 mm or less to ensure the stable forging quality. However, the forming punch failure displayed the wear, and the influences of different materials, lubrication coefficient and punch length to diameter ratio on the die wear were simulated and analyzed. The experiment results show that the die life is increased from 1500 pieces to 10000 pieces with water-based graphite lubricant and punch material 3Cr2W8V steel, and the continuous production is up to 20 hours at least. Finally, a day without changing dies and defects unqualified forgings can be realized to achieve the requirements of automated production.

Funds：

国家国际科技合作专项项目（2015DFA51740）

闫红艳(1979-)，女，硕士研究生，高级工程师 E-mail：yanhongyan2013@126.com 通讯作者：谢谈(1953-)，男，学士，教授级高工 E-mail：xietan@jds.ac.cn

Reference：

[1]丁伯艮. 爪极闭式挤压数值模拟及工艺实验研究[D].马鞍山：安徽工业大学，2014.

Ding B G. Research on Numerical Simulation and Process Experiment of Claw Pole Die Closed Extrusion[D]. Maanshan：Anhui University of Technology，2014.

[2]周杰，赵军，安治国. 热挤压模磨损规律及磨损对模具寿命的影响[J]. 中国机械工程,2007, 18(17):2112-2115.

Zhou J，Zhao J，An Z G. Wear rule and effects on the die service life during hot extrusion[J]. China Mechanical Engineering, 2007, 18(17): 2112-2115.

[3]陈明. 多工位热模锻压力机机身设计与优化[D].南京：南京理工大学，2013.

Chen M. Design and Optimization of Multi-Station Hot Die Forging Press[D]. Nanjing：Nanjing University of Science and Technology，2013.

[4]凌艳路，孙国强，蒋鹏.铁路货车中型锻件自动化生产线的设计与应用[J]. 锻压技术，2016，41(5)：151-154.

Ling Y L，Sun G Q，Jiang P. Design and application on automation production line of medium forging workpiece for railway truck [J]. Forging & Stamping Technology，2016，41(5)：151-154.

[5]祁鹏飞. 筒形件热冲压工艺数值模拟及试验研究[D].北京：机械科学研究总院，2013.

Qi P F. Numerical Simulation and Experimental Research on Hot Stamping Process for Barrel-Type Workpiece[D]. Beijing：China Academy of Machinery Science and Technology，2013.

[6]谢志平，万博维，张治民，等.大型深孔圆锥形构件省力挤压成形工艺研究[J]. 锻压技术，2015，40(2)：87-92.

Xie Z P，Wan B W，Zhang Z M，et al. Research on labor-saving extrusion forming process of large deep hole conical workpiece [J]. Forging & Stamping Technology，2015，40(2)：87-92.

[7]潘秀秀，杨屹，杨刚，等.工作夹片的锻造工艺数值模拟分析[J]. 锻压技术，2015，40(3)：11-15.

Pan X X，Yang Y，Yang G，et al. Numerical simulation and analysis of forging process for the work clamping piece [J]. Forging & Stamping Technology，2015，40(3)：11-15.

[8]任杰，王强，冀翠斌，等.反挤压筒形件成形力研究[J]. 锻压技术，2015，40（11）：122-126.

Ren J，Wang Q，Ji C B，et al. Study on forming force of cylindrical part in backward extrusion [J]. Forging & Stamping Technology，2015，40(11)：122-126.

[9]李振红，黄英娜，张质良. 亚热精密成形过程模具磨损的数值模拟研究[J]. 精密成形工程，2010, 2(2):5-9.

Li Z H，Huang Y N，Zhang Z L. Die wear simulation of semi-hot precision forming process[J]. Netshape Forming Engineering，2010, 2(2):5-9.

[10]张明.6061铝合金热挤压过程中的摩擦磨损行为等效表征研究[D].长沙：湖南大学，2014.

Zhang M. Equivalent Characterization of the Friction and Wear Behavior during Hot Extrusion of 6061 Aluminum Alloy[D]. Changsha：Hunan University，2014.

[11]李宝聚，王兆辉，谭磊，等. 热锻工艺参数对模具磨损影响的有限元分析[J]. 模具工业, 2014, 40(9):6-11.

Li B J，Wang Z H，Tan L，et al. Finite element analysis of effect of hot forging process parameters on die wear[J]. Die & Mould Industry,2014, 40(9):6-11.

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