摘要
板材冲压工艺中最常见的缺陷即为起皱、拉裂问题,以某种结构较为复杂的汽车不锈钢盖板作为研究对象,基于DEFORM有限元平台及正交试验手段,对冲压成形过程进行数值分析,以零件最小厚度、最大厚度、损伤值、起皱作为评判目标,研究了压边力、摩擦因数、凸凹模间隙及冲压速度等不同因素水平对零件成形质量的影响规律,并通过极差分析优化了冲压工艺参数。研究结果表明:凸凹模间隙及压边力对零件成形质量的影响较大,摩擦因数的影响最小;采用最优工艺参数组合后,零件的最小厚度提高了53%,零件损伤值较小,达到了降低零件开裂风险的目的。最后,参考最优工艺参数组合进行试模生产,获得了符合要求的零件,侧面验证了模拟结果的可靠性。
The most common defects in sheet stamping process are problems of wrinkling and cracking.For an automobile stainless steel cover plate with complex structure,the stamping process was numerically analyzed based on finite element platform DEFORM and orthogonal test method.Then,taking the minimum thickness,the maximum thickness,the damage value and the wrinkling of part as the evaluation objectives,the influences of different factors such as blank holder force,friction factor,clearance between punch and die and stamping speed on the forming quality of parts were studied,and the stamping process parameters were optimized by range analysis.The results show that the impacts of clearance between punch and die and blank holder force on the forming quality of parts were greater,and the impact of friction factor is the least.After adopting the optimal process parameters combination,the minimum thickness of part is increased by 53%,the damage value of part is small,and the purpose of reducing the crack risk for part is realized.Finally,according to the optimal process parameters combination,the trial production is carried out,and the parts that meet the requirements are obtained to verify the reliability of the simulation results.
作者
吴阿敏
Wu Amin(School of Mechanical Engineering,Jiangsu Vocational College Agriculture and Forestry,Jurong 212400,China)
出处
《锻压技术》
CAS
CSCD
北大核心
2021年第10期131-135,共5页
Forging & Stamping Technology
关键词
板材冲压
起皱
拉裂
损伤值
压边力
sheet stamping
wrinkling
cracking
damage value
blank holder force
