锻压技术

基于田口试验的新能源汽车蓄能器筒体成形缺陷分析与参数优化

英文标题：Forming defect analysis and parameter optimization on new energy vehicle accumulator cylinder based on Taguchi test

作者：罗婷劼刘港

单位：广西机电职业技术学院

关键词：蓄能器筒体田口试验加权评分法筒体变形筒壁开裂

分类号：TG376.2

出版年,卷(期):页码：2023,48(2):44-51

摘要：

针对某型号新能源汽车蓄能器筒体生产过程中遇到的筒体变形、筒壁质量差、载荷大的问题，借助Deform-3D有限元软件，对蓄能器筒体的成形过程进行了研究。首先，分析了蓄能器筒体实际成形缺陷产生的原因，并确定了工艺的优化对象及优化变量；其次，基于田口试验建立了正交试验方案，并通过UG和Deform-3D完成了每组方案的建模、仿真以及试验数据的获取；最后，通过加权评分法对不同类别的试验数据进行了统一，并采用信噪比的望大特性模型对数据进行了分析及优化。模拟及试验结果表明：当坯料温度为950 ℃、模具预热温度为400 ℃、挤压速度为35 mm·s-1、凸模工作带长度为20 mm时，为最优工艺水平组合，不仅能够解决蓄能器筒体变形和筒壁开裂的问题，而且能够降低成形载荷，有效防止了模具开裂，延长了使用寿命。

Aiming at the problems of cylinder deformation, poor quality of cylinder wall and large load encountered in the production process for a certain type of new energy vehicle accumulator cylinder, the forming process of accumulator cylinder was studied by finite element software Deform-3D. Firstly, the causes of the actual forming defects for accumulator cylinder were analyzed, and the optimization objects and variables of the process were determined. Secondly, the orthogonal test scheme was established based on Taguchi test, and the modeling, simulation and experimental data acquisition of each scheme were completed by UG and Deform-3D. Finally, the different kinds of experimental data were unified by weighted scoring method, and the data was analyzed and optimized by using the expected large characteristic model of signal-to-noise ratio. The simulation and test results show that when the billet temperature is 950 ℃, the mold preheating temperature is 400 ℃, the extrusion speed is 35 mm·s-1 and the working belt length of conves die is 20 mm, it is the optimal process level combination, which can not only solve the problems of accumulator cylinder deformation and cylinder wall cracking, but also reduce the forming load, effectively prevent the mold cracking and prolong the service life.

基金项目：

作者简介：罗婷劼（1984-），女，学士，讲师，E-mail：ltj198406@163.com；通信作者：刘港（1979-），男，硕士，讲师，E-mail：752962042@qq.com

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