摘要
为避免钢制轮辐在拉深和反拉深过程中易出现拉裂或局部减薄等缺陷的问题,以某酸洗材料不同成分体系的两种原材料为试验材料,以材料的力学性能为基础,基于Autoform软件对以上两种材料进行仿真分析,从主次应变和厚度减薄对比研究两种材料的成形性,比较应变硬化指数n值和塑性应变比r值对成形质量的影响。对比轮辐实际生产中成形状态,得出塑性应变比r值较大时在厚度减薄上有利于零件的成形,3个方向的r差值应尽量较小,且保证3个r值在0.8左右;当n值大于或等于0.13时主应变量较小,破裂风险较低,有利于成形,组织均匀且伸长率更高的产品成形性优异。
In the process of drawing and reverse drawing,the steel spokes were prone to cracking or local thinning.To avoid the above defects,two types of raw pickling materials with different composites were used as the experimental materials,and based on the mechanical properties of materials,the simulation analysis of the above two materials was carried out by using Autoform software.The formability of the two materials was compared from the aspects of major and minor strain and thickness reduction.The effects of strain hardening index n and plastic strain ratio r on the forming quality were analyzed.The forming state in actual production of spokes was compared,and the results show that the higher plastic strain ratio r is more favorable to the forming of parts on the thickness reduction.The r difference between the three directions should be small,and their values should be guaranteed around 0.8.The major strain is small when n is greater than or equal to 0.13,which causes low risk of rupture and higher formability of the materials.The product with uniform structure and higher elongation has excellent formability.
作者
胡开广
李涛
郭子峰
韩龙帅
杨建炜
冯军
HU Kai-guang;LI Tao;GUO Zi-feng;HAN Long-shuai;YANG Jian-wei;FENG Jun(Shougang Research Institute of Technology,Beijing 100043,China)
出处
《塑性工程学报》
CAS
CSCD
北大核心
2018年第6期140-146,共7页
Journal of Plasticity Engineering
关键词
酸洗板
冲压
拉深
主次应变
厚度减薄
pickling plate
stamping
deep drawing
major and minor strain
thickness reduction
