摘要
拼焊板技术在汽车制造业中得到了广泛的应用。焊缝存在是导致拼焊板成形性能降低的重要影响因素,因此研究控制焊缝移动非常重要。通过对盒形件拉深过程的应力分析,得到了焊缝移动规律。基于非线性隐式算法,选用各向异性屈服准则对盒形件拉深进行了数值模拟;数值模拟中采用阶梯压边圈,并精确建立了焊缝模型。通过对模拟结果的应力、单元厚度分析,比较模拟结果和试验的吻合程度,验证了应力分析和模拟结果的正确性。
Tailor-welded blanks are commonly used in the automotive industry, especially for pannel manufacturing. The formability of tailor-welded blanks are limited because of the weld bead and heat affected zone. The regularity of the weld bead displacement is deduced by analysing the stress of the square cup stamping. The FEM analysis of square cup stamping is based on non-linear and implicit algorithm and anisotropy hardness criterion, The model of weld bead and heat affected zone are built accurately and the stepped blankholder is adopted. The numerical modeling results are compared with the expermental result about the distribution of stress and element thickness. The validity of stress analysis and numerical model is demonstrated by the comparison.
出处
《电加工与模具》
2006年第3期55-57,共3页
Electromachining & Mould
基金
国家自然科学基金资助项目(50475125)
关键词
拼焊板
盒形件
焊缝
有限元
tailor-welded blanks
square cup
weld line
finite element
