摘要
汽车哈克钉铆套由于具有孔深、壁薄、尺寸小等特点,成形难度较大,通常采用的热镦配合切削加工的生产方式存在效率低、质量不稳定等问题,故提出采用多工位高速冷镦挤生产方式。根据金属塑性成形原理,针对铆套结构特征初步制定了2套多工位冷镦挤成形方案,并借助Deform-3D软件分别进行了数值模拟,获得了两种方案的铆套成形过程、最大成形载荷和金属流线分布等情况。结果表明:方案1存在成形缺陷,而方案2成形良好,无缺陷,载荷也更小。根据最佳方案设计了多工位模具结构,并进行了生产验证。生产结果与模拟分析结果一致,铆套质量良好,无缺陷,尺寸、性能均能满足实际需求,生产效率大幅提升,实现了对哈克钉铆套工艺的升级。
Due to the characteristics of deep hole,thin wall and small size,the forming of automobile Huck rivet sleeve is difficult.The production mode of hot upsetting and cutting is often used,which has problems such as low efficiency and unstable quality.Therefore,the multi-station high-speed cold upsetting extrusion production mode was proposed.First of all,according to the principle of metal plastic forming,two sets of multi-station cold upsetting extrusion forming schemes were preliminarily formulated according to the structural characteristics of rivet sleeve,and the numerical simulation was carried out with the help of software Deform-3D to obtain the forming process of rivet sleeve,the maximum forming load and the metal streamline distribution of the two schemes.The results show that scheme 1 has forming defects,while scheme 2 has good forming without defects and less load.Secondly,the multi-station mold structure was designed according to the best scheme.Finally,the production verification was carried out,and the results were consistent with the simulation analysis results.Thus,the quality of rivet sleeve is good without defects,the size and performance could meet the actual needs,and the production efficiency is greatly improved,which realizes the upgrading of the Huck rivet sleeve process.
作者
尤富仪
张铁山
朱倩倩
You Fuyi;Zhang Tieshan;Zhu Qianqian(School of Transportation,Jiangsu Lianyungang Vocational and Technical College of Industry and Trade,Lianyungang 222061,China;School of Mechanical Engineering,Nanjing University of Science&Technology,Nanjing 210014,China)
出处
《锻压技术》
CAS
CSCD
北大核心
2022年第12期31-37,共7页
Forging & Stamping Technology
基金
江苏省职业教育教学改革研究课题(B/2020/10/120)。
关键词
哈克钉铆套
冷镦挤
载荷
金属流线
模具结构
Huck rivet sleeve
cold upsetting extrusion
load
metall streamline
mold structure
