摘要
采用反复加载-卸载拉伸试验获得了高强0Cr21Ni6Mn9N不锈钢管的弹性模量随塑性变形的变化规律,构建了弹性模量与塑性应变之间的函数关系,并嵌入ABAQUS软件中模拟了工艺参数对高强不锈钢管数控绕弯回弹行为的影响,分析了回弹对工艺参数的敏感性。结果表明:弹性模量变化和恒定条件下,工艺参数对高强不锈钢管数控绕弯回弹行为的影响的变化趋势相似,只是弹性模量变化条件下的回弹值增大了;回弹角和回弹半径随着芯棒伸出量、弯曲速度、助推速度的增大或管材/芯棒间隙、管材/弯曲模间隙、管材/弯曲模摩擦因数的减小而减小。回弹半径对工艺参数更为敏感,其敏感性大小依次为:管材/弯曲模间隙、管材/弯曲模摩擦因数、助推速度、弯曲速度、芯棒伸出量和管材/芯棒间隙,而回弹角对各工艺参数的敏感性不显著。
The change law of elastic modulus for high strength 0 Cr21 Ni6 Mn9 N stainless steel tube versus plastic deformation was obtained by using the repeated loading-unloading tensile tests, and the function relationship between elastic modulus and plastic strain was established, which was embedded into software ABAQUS to simulate the influences of process parameters on springback behavior in numerical control(NC) rotary draw bending for high strength stainless steel tube. Then, the sensitivity of springback to process parameters was analyzed. The results show that the change trend of the influence of process parameters on springback behavior in NC rotary draw bending for high strength stainless steel tube is similar under the conditions of variable elastic modulus and constant elastic modulus, but only the value of springback under the condition of variable elastic modulus increases. Springback angle and radius decrease with the increasing of mandrel extension length, bending speed and push assistant speed or with the decreasing of clearance between tube and mandrel, clearance between tube and bending die and friction coefficient between tube and bending die. The springback radius is more sensitive to the process parameters, and its sensitivity sorts from the largest to the smallest is clearance between tube and bending die, friction coefficient between tube and bending die, push assistant speed, bending speed, mandrel extension length and clearance between tube and mandrel, while the sensitivity of springback angle to various process parameters is not significant.
作者
方军
欧阳芳
尚文瑄
鲁世强
王克鲁
向军淮
Fang Jun;Ouyang Fang;Shang Wenxuan;Lu Shiqiang;Wang Kelu;Xiang Junhuai(School of Materials and Mechatronics,Jiangxi Science and Technology Normal University,Nanchang 330038,China;School of Aeronautical Manufacturing Engineering,Nanchang Hangkong University,Nanchang 330063,China)
出处
《锻压技术》
CAS
CSCD
北大核心
2022年第11期137-145,共9页
Forging & Stamping Technology
基金
江西省自然科学基金资助项目(20192BAB216022)
江西省教育厅科学技术研究项目(GJJ201126,GJJ180615)。
关键词
高强不锈钢管
回弹
弹性模量
数控绕弯
塑性应变
high strength stainless steel tube
springback
elastic modulus
NC rotary draw bending
plastic strain
