摘要
成形极限曲线作为材料成形性能最为综合和简易的判据,已成为衡量材料成形性和解决冲压成形问题的重要工具。通过对AA5182-O铝合金分别进行了单向拉伸试验、杯突试验、刚模胀形实验,获得了相应方法的成形极限应变点,并将3种方法获得的成形极限拟合曲线进行对比,最后通过实冲实验对实验极限的准确性进行了验证。研究发现,由单向拉伸试验和杯突试验获得的成形极限曲线要低于刚模胀形试验获得成形极限曲线,且杯突试验所得极限点存在等拉极限点,而胀形极限曲线缺少等拉极限点,将实际冲压失效点和实验成形极限曲线相比发现单拉实验和杯突试验获得的成形极限曲线更加准确。
As the most comprehensive and simple criterion of material forming,forming limit curves have become an important tool to measure the formability and solve the stamping problems. The uniaxial tensile test,cupping test and bulging experiments were conducted with aluminum alloy AA5182- O,and the forming limits strain points of corresponding methods were obtained,further the fitted experiment forming limit curves were compared with each other,finally,the stamping was conducted to verify the accuracy of the test forming limit curves. The study shows that the forming limit curves obtained by uniaxial tensile test and cupping test are lower than that by bulging experiments. However,the limit point obtained by cupping test has the equivalent limit point while the bulging limit curve lacks of it.After compared the stamping failure limit points with the experiment forming limit curves,the forming limit curves obtained by the single drawing and cupping tests are more accurate than that by the bulging experiments.
出处
《锻压技术》
CAS
CSCD
北大核心
2016年第3期29-33,共5页
Forging & Stamping Technology
基金
国家自然科学基金资助项目(51165021)
江苏高校品牌专业江苏项目(PPZY2015A086)
关键词
成形极限曲线
杯突试验
胀形实验
forming limit curve
cupping tests
bulging experiments
