摘要
针对冲压件回弹误差,建立了3D复杂形状板料冲压成形精度闭环控制系统。以回弹误差为控制目标,以线性闭环控制系统、空间Fourier变换和频域传递函数为理论基础,基于模具实验迭代,建立了模具回弹误差补偿修正算法。该算法接收模具和冲压件的激光扫描测量数据,输出模具型面修正后离散数据。利用提出的频域模具修正算法对回弹现象较为严重的弯曲和浅拉深过程,进行了回弹误差补偿的有效性验证。实验结果表明,该算法可以较好地控制板料冲压成形回弹误差,具有工程使用价值。
Aiming at spring-back errors, a closed-loop accuracy control system for complex 3D sheet metal stamping is constructed. The computational formula of DMA(dies-|modification algorithm) is derived in the prerequisite of small spring-back deformation and steady-going stamping process parameter. The algorithm based on the theory of linearity closed loop control system,space Fourier transform, transfer function in frequency domain and die experiment alternate. The validity of DMA for typical sheet metalv stamping is systematically approved by experiments of multi-curvature bending and spherical surface shallow drawing experiment. DMA is used for the first time in the fabricating of complex 3D sheet metal stamping dies.
出处
《塑性工程学报》
CAS
CSCD
北大核心
2005年第3期60-66,共7页
Journal of Plasticity Engineering
基金
国家863项目(2001AA421270)
"十五"国家科技攻关项目(2001BA205B1001)
福建省自然科学基金项目(E0410026)。
关键词
板料冲压
回弹误差补偿
闭环控制系统
传递函数
sheet stamping
springback error compensation
closed loop control system
transfer function
