锻压技术

飞机隔框锻件预锻成形规律及影响因素模拟研究

英文标题：Simulation research on forming law and influencing factors for pre-forging of aircraft bulkhead forgings

作者：钟锐魏科余鑫波林美胡康宏

单位：南昌航空大学

分类号：TG316

出版年,卷(期):页码：2021,46(11):25-31

摘要：

隔框是航空航天飞行器常用的传力及承力结构件，由筋肋、框壁及筋与筋之间的腹板组成，通常需要先预锻成形出满足几何形状和组织性能要求的预制坯，再通过终锻实现结构件成形。基于数值模拟方法，研究了飞机隔框锻件预锻成形过程中的材料流动规律，根据预锻件的结构特点，将其划分为方形区域和圆形区域，并分析了各区域充填和靠模顺序的影响因素。首先建立了隔框锻件预锻成形过程的有限元模型，随后采用简易的圆柱形毛坯分析了材料在型腔中的流动情况，结果表明：因毛坯放置在圆形区域，使得材料充填至方形区域滞后，易导致方形区域充填困难。最后，采用改进的毛坯形状，结合正交试验方法设计了模拟方案，研究了变形速度、摩擦因子、变形温度及毛坯放置位置对于充填影响的显著性以及影响规律，并获得了较优的工艺参数，使充填效果大大提高，不同区域的靠模顺序趋于一致。

The bulkhead is a commonly used as force-transmitting and load-bearing structural part of aerospace vehicles, and it consists of ribs, frame walls and webs between ribs. Usually, it is necessary to pre-forge a preform that meets the requirements of geometrical shape and organizational performance, and then realize the component forming through final forging. Therefore, based on the numerical simulation method, the material flow law in the pre-forging process of aircraft bulkhead forgings was studied, and according to the structural characteristics of the pre-forged part, it was divided into a square area and a circular area, and the factors affecting the filling and die contact sequence of each area were analyzed. Firstly, a finite element model of the pre-forging process for bulkhead forgings was established, and then, the material flow condition in the die cavity was analyzed by a simple cylindrical billet. The results show that the material filling to the square area lags behind because the billet is placed in the circular area, which is easily to cause filling difficulty in the square area. Finally, the simulation schemes were arranged by taking the improved shape of billet and combining with the orthogonal experiment method, and the influences of deformation speed, friction factor, deformation temperature and billet placement position on the significance order and influence laws of the filling were studied. In addition, the better process parameters were obtained, the effective die filling was greatly improved, and the die contact sequence of different areas tended to be consistent.

基金项目：

国家自然科学基金资助项目（52005241）；江西省自然科学基金资助项目（20192BAB216023）；南昌航空大学第十五届“三小”项目（2020HZ042）

作者简介：钟锐（1999-），男，学士，E-mail：ruizhong20lym@163.com；通信作者：魏科（1986-），男，博士，讲师，E-mail：weike@nchu.edu.cn

参考文献：

[1]曹春晓. 一代材料技术, 一代大型飞机[J]. 航空学报, 2008, 29(3): 701-706.

Cao C X. One generation of material technology, one generation of large aircraft [J]. Acta Aeronautica et Astronautica Sinica, 2008, 29(3): 701-706.

[2]李维娜. 民用飞机隔框结构设计[J]. 中国科技信息, 2017，(14):95-96.

Li W N. Design of civil aircraft bulkhead structure [J]. China Science and Technology Information, 2017，(14):95-96.

[3]Yang H, Fan X G, Sun Z C, et al. Some advances in local loading precision forming of large scale integral complex components of titanium alloys [J]. Materials Research Innovations，2011, 15(S1): 493-498.

[4]杨合, 孙志超, 樊晓光,等. 钛合金大型复杂构件等温局部加载β锻造组织控制研究进展[J]. 航空材料学报, 2014，(4): 72-82.

Yang H, Sun Z C, Fan X G, et al. Advances in microstructure control during isothermal forming of Tialloy large complex components by cearβ local forging [J]. Journal of Aeronautical Materials, 2014，(4):72-82.

[5]杨合, 孙志超, 詹梅, 等. 局部加载控制不均匀变形与精确塑性成形研究进展[J]. 塑性工程学报, 2008，(2): 12-20.

Yang H, Sun Z C, Zhan M, et al. Advances in control of unequal deformation by locally loading and theories related to precision plastic forming [J]. Journal of Plasticity Engineering, 2008，(2): 12-20.

[6]周稳静. TA15钛合金隔框锻件预锻成形初始毛坯优化及工艺参数确定[D].西安：西北工业大学, 2010.

Zhou W J. Optimization of Preliminary Blanks for Preforging of TA15 Titanium Alloy Frame Forgings and Determination of Process Parameters [D]. Xi’an：Northwestern Polytechnical University, 2010.

[7]Zhang D W, Yang H. Preform design for largescale bulkhead of TA15 titanium alloy based on local loading features [J]. International Journal of Advanced Manufacturing Technology，2013, 67(9-12): 2551-2562.

[8]Wei K, Zhan M, Fan X G, et al. Unequalthickness billet optimization in transitional region during isothermal local loading forming of Tialloy ribweb component using response surface method [J]. Chinese Journal of Aeronautics，2018, 31(4): 845-859.

[9]Wei K, Yang H, Fan X G, et al. Unequal thickness billet design for largescale titanium alloy ribweb components under isothermal closeddie forging [J]. International Journal of Advanced Manufacturing Technology，2015, 81(5): 729-744.

[10]Dutta A, Venugopal A. Simulation of isothermal forging of compressor disc by combined numerical and physical modeling techniques [J]. Journal of Material Processing Technology, 1997, 72(3): 392-395.

[11]李亚智, 赵美英, 万小朋. 有限元法基础与程序设计[M]. 北京:科学出版社, 2004.

Li Y Z, Zhao M Y, Wan X P. Superplastic Deformation Theory of Metals [M]. Beijing: Science Press, 2004.

[12]沈昌武. TA15、TC11 钛合金热变形材料本构模型研究[D].西安：西北工业大学. 2007.

Shen C W. Research on Material Constitution Models of TA15 and TC11 Titanium Alloys in Hot Deformation Processes [D]. Xi’an：Northwestern Polytechnical University, 2010.

[13]杨艳慧, 刘东, 贺子延, 等. 基于响应面法（RSM）的锻造预成形多目标优化设计 [J]. 稀有金属材料与工程,2009, 38(6): 1019-1024.

Yang Y H, Liu D, He Z Y, et al. Multiobjective preform optimization using RSM [J]. Rare Metal Materials and Engineering, 2009, 38 (6): 1019-1024.

[14]杨合, 詹梅. 材料加工过程实验建模方法 [M]. 西安：西北工业大学出版社，2008.

Yang H, Zhan M. Experimental Modeling Method for Material Processing [M]. Xi’an：Northwestern Polytechnical University Press，2008.

[15]Gao P F, Yang H, Fan X G, et al. Forming defects control in transitional region during isothermal local loading of Tialloy ribweb component[J]. International Journal of Advanced Manufacturing Technology，2015, 76(5):857-868.

[16]Kim Y H, Bae W B, Cho J R, et al. An experimental study on the nonaxisymmetric squaredie extrusion using model material test [J]. Journal of Materials Processing Technology, 1998, 80-81: 653-656.

服务与反馈：

【文章下载】【加入收藏】