摘要
为有效提高内高压成形试验机的胀形精度,减少试验量,获得胀形过程的最佳加载路径,对胀形过程中加载路径寻优进行了有限元数值模拟,通过位置闭环和压力闭环协调作用的控制模式实现了内高压成形过程优化控制。简要说明了内高压成形机的设备构成,说明了控制参数加载路径的寻优过程,在实际控制过程中,位置闭环和压力闭环的协调优化控制保证了轴向进给和背向位移的最优控制,同时确保了胀形压力的平稳加载,针对304奥氏体不锈钢管材进行了成形试验,采用最优加载路径和优化控制模式,与有限元模拟结果对比获得了良好的成形效果,壁厚误差控制在±5%之内。
To effectively improve the bulging accuracy of the internal high pressure forming test machine,reduce the amount of test,and obtain the optimal load path of the bulging process,the finite element simulation of loading path optimization in bulging process was carried out.The optimal control of internal high pressure forming process was realized by the coordinate control mode of position closed loop and pressure closed loop.The equipment composition of internal high pressure forming machine was briefly introduced,and the optimization process of loading path of control parameters was emphasized.The optimal control of axial feed and back displacement was ensured by the coordinated and optimized control mode of position closed loop and pressure closed loop in actual control process.The forming test of304 austenitic stainless steel pipe was carried out,the optimal loading path and optimal control mode were adopted and a good forming effect was obtained compared with the finite element simulation results.The error of wall thickness is controlled within±5%.
作者
苏海龙
骆宗安
冯莹莹
SU Hai-long;LUO Zong-an;FENG Ying-ying(State Key Laboratory of Rolling and Automation,Northeastern University,Shenyang 110819,China)
出处
《塑性工程学报》
CAS
CSCD
北大核心
2021年第11期65-70,共6页
Journal of Plasticity Engineering
基金
国家自然科学基金资助项目(2017YFB0304105-3)。
关键词
内高压成形
轴向进给
背向位移
加载路径
寻优控制
internal high pressure forming
axial feed
backward displacement
loading path
optimal control
