锻压技术

3D的新能源电池壳底部台阶镦挤

英文标题：Improvement and optimization on upset-extrusion forming process for bottom step of new energy battery shell based on DEFORM-3D

作者：孙如梦1 周礼菊1 司大强2 黄瑶1 王雷刚1

单位：1.江苏大学 2.江苏兴锻智能装备科技有限公司

关键词：新能源4680系列电池壳镦挤台阶锻造整形预制孔模具载荷

分类号：TG316

出版年,卷(期):页码：2023,48(9):1-6

摘要：

以新能源4680系列电池壳为研究对象，为了保证密封效果，在电池壳底部设计了一种镦挤台阶结构，经过工艺试验验证，底部台阶成形需要预冲底孔、锻造成形、精冲底孔3步工序。针对底部台阶一次成形会产生毛刺等问题，在原工艺基础上提出了先锻造成形再整形的改进工艺，采用DEFORM3D软件分别分析了两种不同工艺方案中底部台阶结构的成形效果和载荷变化情况。由于预制孔的直径尺寸对后续精冲孔影响较大，因此，设计了3种不同直径尺寸的预制孔，对其进行数值模拟，并根据成形规律和载荷变化以及底部预制孔成形要求进行比较、分析，选取最佳预制孔直径尺寸。结果表明：改进后的先锻造成形再整形工艺有利于降低模具载荷，使台阶结构的成形效果更好；预制孔直径为Φ8.5 mm时，载荷最小，更利于后续精冲孔工序的进行。最后，通过实际生产验证了改进工艺和优化结果的合理性。

For the new energy battery shell of 4680 series, in order to ensure the sealing effect, an upset-extruded step structure was designed at the bottom of battery shell, and after the process test verification, the forming of bottom step required a three-step process of pre-punching of bottom hole, forging and fine-punching of bottom hole. Then, aiming at the problem of burrs in one-time forming of the bottom step, an improved process of first forging and then shaping was proposed based on the original process, and the forming effect and load change of the bottom step structure in the two different process schemes were analyzed by software DEFORM-3D. Furthermore, since the diameter of prefabricated hole had a great influence on the subsequent fine-punching hole, three prefabricated holes with different diameters were designed and numerically simulated, and according to the forming law and load change as well as the forming requirements of the bottom prefabricated hole, the comparison and analysis were conducted to choose the best prefabricated hole diameter. The results show that the improved process of first forging and then shaping is beneficial to reduce the mold load and make the forming effect of the step structure better. When the prefabricated hole diameter is Φ8.5 mm, the load is smallest, which is more conducive to the subsequent fine-punching process. Finally, the rationality of the optimization results and the improved process are verified by actual production.

基金项目：

国家自然科学基金资助项目（51775249）

作者简介：孙如梦（1999-），女，硕士研究生 E-mail：srm9936@163.com 通信作者：王雷刚（1963-），男，博士，教授，博士生导师 E-mail：lgwang@mail.ujs.edu.cn

参考文献：

[1]李妍妍. 新能源汽车用动力电池钢壳多步拉深工艺研究 [D]. 马鞍山：安徽工业大学，2020.

Li Y Y. Research on Multistep Drawing Process of Power Battery Steel Shell for New Energy Vehicle [D]. Ma′anshan: Anhui University of Technology, 2020.

[2]罗桂成，盛春龙. 浅析新能源汽车的未来发展趋势[J].时代汽车，2022，(21)：105-107.

Luo G C, Sheng C L. A brief analysis of the future development trend of new energy vehicles [J]. Times Automobile, 2022, (21):105-107.

[3]闵建成. 电池壳成形技术研究[J]. 锻造与冲压，2022,(2)：37-42.

Min J C. Research on forming technology of battery case [J]. Forging & Metalforming, 2022, (2):37-42.

[4]牛世浦. 低碳冲压钢板的生产工艺优化与热轧组织晶粒度控制[D]. 沈阳：东北大学，2018.

Niu S P. Production Process Optimization and Hot Rolling Microstructure Grain Size Control of Low Carbon Stamped Steel Sheet [D]. Shenyang: Northeastern University, 2018.

[5]杨弟，王绪，毛为民，等. 深冲SPCE与超深冲IF钢r值差异的ODF分析[J]. 金属热处理学报，1994,15(3)：50-54.

Yang D, Wang X, Mao W M, et al. ODF analysis of r value difference between deep drawing SPCE and ultra deep drawing IF steel [J]. Journal of Metal Heat Treatment, 1994,15(3):50-54.

[6]胡建平，李小平. DEFORM3D塑性成形CAE应用教程[M].北京：北京大学出版社，2011.

Hu J P, Li X P. DEFORM3D Plastic Forming CAE Application Course [M]. Beijing:Peking University Press, 2011.

[7]赵伟平，刘江涛，贾倩. 基于Deform的齿轮泵从动齿轮轴闭式模锻数值模拟分析[J]. 热加工工艺，2020，49(13)：93-95,99.

Zhao W P, Liu J T, Jia Q. Numerical simulation analysis of driven gear shaft closed die forging based on Deform [J]. Hot Working Technology, 2020，49(13):93-95,99.

[8]卜军伟，蔡云. 基于DEFORM的直齿圆柱齿轮精锻工艺[J]. 锻压技术，2021，46(11)：43-48.

Bu J W, Cai Y. Precision forging process of spur gear based on DEFORM [J]. Forging & Stamping Technology, 2021，46(11):43-48.

[9]Xiao B X, Hong R L. Numerical simulation analysis of the cold bending forming technology based on DEFORM [J]. Advanced Materials Research, 2012, 1700: 490-495.

[10]Wei H K, Chen B B. Application study on metal forging technology of square block based on DEFORM[J]. Applied Mechanics and Materials, 2010, 893: 20-23.

[11]史士鹏，冀晋辉，李文奇. 球形管件多工位冷镦内折叠原因分析与工艺改进[J]. 锻压技术，2022，47(7)：138-144.

Shi S P, Ji J H, Li W Q. Cause analysis and process improvement of spherical pipe fitting in multistation cold heading [J]. Forging & Stamping Technology, 2022，47(7):138-144.

[12]陈永强，陈玉，杨群. SCM435合金钢接头的冷镦工艺研究与数值模拟[J]. 锻压技术，2022，47(11)：28-35.

Chen Y Q, Chen Y, Yang Q. Research and numerical simulation of cold heading of SCM435 alloy steel joint [J]. Forging & Stamping Technology, 2022，47(11):28-35.

[13]薛世博，段园培，汪常开.坯料形状对多阶梯变壁厚铝合金端盖背压挤压成形质量影响[J]. 塑性工程学报，2021，28(4)：30-35.

Xue S B, Duan Y P, Wang C K. Influence of billet shape on back pressure extrusion quality of multistep aluminum alloy end cap with variable wall thickness [J]. Journal of Plasticity Engineering,2021，28(4):30-35.

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