锻压技术

基于有限元分析的汽车用大法兰螺母冷镦成形技术

英文标题：Cold heading technology on automotive large flange nut based on finite element analysis

作者：田亚丁1 刘德波2

分类号：TG316

出版年,卷(期):页码：2023,48(10):31-37

摘要：

以车用大法兰螺母为研究对象，通过结构分析，提出两种冷镦成形工艺方案。首先，研究了40CrNiMoA钢在室温条件下的变形特性，以建立其准确的材料模型；其次，采用Deform3D软件对两种方案的前4个工位分别进行有限元建模和成形模拟，并对比了模具的填充、材料的变形、等效应力的分布以及各工位的成形载荷情况，确定了更加可行的冷镦成形方案；最后，根据该可行方案对各工位的模具结构进行设计与制造，并装入6工位冷镦机中进行试模。结果显示：该冷镦成形工艺稳定，生产速度快，并且制造的大法兰螺母外形完整、质量好，无折叠和开裂等严重缺陷，使用性能满足厂家的需求。

For automotive large flange nuts, two cold heading process schemes were proposed by structural analysis. Firstly, the deformation characteristics of 40CrNiMoA steel at room temperature were studied to establish an accurate material model. Secondly, finite element modeling and forming simulation on the first four stations of the two schemes were conducted by software Deform-3D, respectively, and the filling of mold, the deformation of material, the distribution of equivalent stress and the forming load of each station were compared to determine a more feasible cold heading scheme. Finally, according to the feasible scheme, the mold structure of each station was designed and manufactured, and a mold testing was carried out by a 6-station cold heading machine. The results show that the cold heading process is stable, the production speed is fast, and the manufactured large flange nuts have complete shape, good quality and no serious defects such as folding and cracking, and the performance meets the requirements of manufacturer.

基金项目：

2021年度河南省科技厅科技攻关项目（212102210249）

田亚丁（1976-），男，本科，副教授 E-mail：xixihaha1217@aliyun.com

参考文献：

［1］陈剑,张东民,周伟民,等.球头销多工位冷镦挤工艺研究及模具设计
［J］.热加工工艺,2018,47(11):153-156.

Chen J,Zhang D M,Zhou W M,et al.Process research and die design of multistation cold upsettingextrusion of ball head pin
［J］.Hot Working Technology,2018,47(11):153-156.

［2］赵志繁,侯怀书,钱瑞福,等.六角法兰面锁紧螺母冷镦挤成型数值模拟及优化
［J］.热加工工艺,2020,49(17):101-104,107.

Zhao Z F,Hou H S,Qian R F,et al.Numerical simulation and optimization of cold headingextrusion of hexagon flange face locking nuts
［J］.Hot Working Technology,2020,49(17):101-104,107.

［3］肖志玲,刘百宣,孙红星,等.高强钢20MnTiB多工位冷镦变形行为
［J］.材料工程,2016,44(3):77-83.

Xiao Z L,Liu B X,Sun H X,et al.Multistage cold forging behavior of high strength steel 20MnTiB
［J］.Journal of Materials Engineering,2016,44(3):77-83.

［4］丛兵兵,孔明,张弘斌,等.马车螺栓冷镦成形有限元模拟及模具设计
［J］.塑性工程学报,2022,29(2):76-81.

Cong B B,Kong M,Zhang H B,et al.Finite element simulation and die design of cold heading forming for carriage bolt
［J］.Journal of Plasticity Engineering,2022,29(2):76-81.

［5］郑鹏辉,关悦,许吉星,等.A286高温合金十二角法兰面螺栓多工位冷镦成形工艺
［J］.制造技术与机床,2022(7):45-50.

Zheng P H,Guan Y,Xu J X,et al.Multi station cold heading process of A286 superalloy twelve point flange bolt
［J］.Manufacturing Technology & Machine Tool,2022(7):45-50.

［6］罗鹰,冒兴峰.基于COLDFORM的汽车万向节接头多级冷锻成形数值仿真
［J］.热加工工艺,2018,47(15):123-126.

Luo Y,Mao X F.Numerical simulation of multistage cold forging forming of automobile universal joint based on COLDFORM
［J］.Hot Working Technology,2018,47(15):123-126.

［7］丛兵兵,杜以常,张弘斌,等.马车螺栓镦锻成形微观组织有限元模拟
［J］.塑性工程学报,2023,30(3):175-182.

Cong B B,Du Y C,Zhang H B,et al.Finite element simulation of microstructure in upseting of carriage bolt
［J］.Journal of Plasticity Engineering,2023,30(3):175-182.

［8］于玲,刘清文.基于有限元的法兰轴结构件塑性成形工艺分析
［J］.精密成形工程,2023,15(2):218-223.

Yu L,Liu Q W.Plastic forming process of flange shaft structure based on finite element
［J］.Journal of Netshape Forming Engineering,2023,15(2):218-223.

［9］刘帮平,谌曲平,严国荣,等.航空螺栓冷镦的Deform 3D模拟与生产实践
［J］.精密成形工程,2012,4(3):22-26,46.

Liu B P,Chen Q P,Yan G R,et al.Simulation using Deform 3D and production practice on cold heading process of aviation bolts
［J］.Journal of Netshape Forming Engineering,2012,4(3):22-26,46.

［10］张东民,盛育东,张金玉,等.六角开槽螺母的冷镦工艺优化及数值模拟
［J］.机械设计与制造,2018,325(3):191-194.

Zhang D M,Sheng Y D,Zhang J Y,et al.Numerical simulation and optimization for cold heading of hexagonal slot nut
［J］.Machinery Design & Manufacture,2018,325(3):191-194.

［11］赵庆雨,杨嵩.基于数值分析的汽车六角锁紧螺母冷镦工艺改进
［J］.锻压技术,2022,47(10):29-35.

Zhao Q Y,Yang S.Improvement on cold heading process for automobile hexagon lock nut based on numerical analysis
［J］.Forging & Stamping Technology,2022,47(10):29-35.

［12］梁强.活塞销冷镦挤成形微折叠缺陷分析及改进措施
［J］.塑性工程学报,2018,25(6):99-104.

Liang Q.Microfolding defect analysis and improvement of cold upsettingextruding process for pistonpin
［J］.Journal of Plasticity Engineering,2018,25(6):99-104.

［13］柏世兵.基于计算机数值分析的一种汽车非标件自动化冷镦工艺
［J］.锻压技术,2022,47(9):30-38.

Bai S B.An automatic cold upsetting process for automobile nonstandard parts based on computer numerical analysis
［J］.Forging & Stamping Technology,2022,47(9):30-38.

服务与反馈：

【文章下载】【加入收藏】