基于计算机数值分析的一种汽车非标件自动化冷镦工艺  

An automatic cold upsetting process for automobile non-standard parts based on computer numerical analysis

作　　者：柏世兵 Bai Shibing(IFLYTEK Big Data Department,Chongqing City Vocational College,Chongqing 402160,China)

机构地区：[1]重庆城市职业学院科大讯飞大数据学院,重庆402160

出　　处：《锻压技术》2022年第9期30-38,共9页Forging & Stamping Technology

基　　金：重庆市教育委员会项目(193299);重庆市级规划项目(2020-GX-397)。

摘　　要：为改变一种汽车非标件当前生产工艺工序多、生产效率低且产品性能差异大的现状,提出了两种自动化冷镦方案。运用Deform-3D建立了10B21钢的Johnson-Cook本构模型,同时基于该模型对两种方案各工位零件进行了模拟成形,分析了材料变形规律、等效应力分布以及载荷情况,进行了工艺检查和择优,确定了最终成形方案,即下料—减径和预成形内孔—预镦头部—镦花形头—头部整形—头部终成形—冲孔,并完成了工艺试验。生产试验表明:有限元分析结果准确,优选获得的冷镦工艺可靠,能够实现该非标件的批量生产,获得的零件成形完整、表面质量好,无刮料、折叠、坑洼等问题,尺寸精度达到了生产要求。In order to change the current situation of multipre processes, low production efficiency and large differences of product performance in curvent production process for an automobile non-standard part, two kinds of automatic cold upsetting schemes were proposed, and the Johnson-Cook constitutive model of 10 B21 steel was established by Deform-3 D. Then, based on the model, the simulated forming of the parts in each station for the two schemes were conducted, and the deformation law, equivalent stress distribution and load situation of the material were analyzed. Furthermore, the process inspection and optimization were carried out, and the final forming scheme was determined, namely, blanking-diameter reducing and inner hole pre-forming-head pre-upsetting-flower head upsetting-head shaping-head final forming-punching, and the process test was completed. Production tests show that the finite element analysis results are accurate, the optimized cold upsetting process is reliable, and the mass production of the non-standard parts can be realized. The obtained parts have complete forming, good surface quality and no problems of scraping, folding, potholes and so on, and the dimensional accuracy meets the production requirements.

关 键 词：非标件 自动化冷镦 DEFORM-3D 本构模型 等效应力 载荷 

分 类 号：TG386.3[金属学及工艺—金属压力加工]