三维非规则冲压件的回弹扭转补偿控制

Compensation Control of Springback Torsion for 3D Irregular Stamping Parts

针对一类特殊的三维非规则冲压件的成形,提出了一种基于变形传递函数(DTF)的相对扭转补偿控制方法,即在试制产品截面间运用惯性主轴向量的相对扭转角变化评价截面的相互关系,用DTF方法建立数值模拟相对扭转角偏差与实际相对扭转角偏差的传递函数,将此传递函数用于模具型面的设计中.在螺旋叶片板的成形控制中的应用表明,该方法可使叶片板零件整体空间扭转误差控制在5%之内,保证了整体焊接时相邻叶片板相接面的质量,解决了截面间扭转不够导致的不能顺利安装的问题.

A compensation control method of springback torsion based on the deformation transfer function（DTF） is proposed for a special kind of 3D irregular stamping parts.In this method,the relationships among part sections are evaluated according to the relative torsion angle variation of inertial principle-axis vector,and the transfer function between the simulated and the experimental relative torsion angle deviations is deduced based on the DTF method,which is then used to design the die face.The application of the proposed compensation control method to the formation of a spiral blade sheet indicates that the method keeps the integral space torsion error of the blade sheet under 5%, guarantees the quality of contact surface of adjacent blade sheets in the integral welding process, and overcomes the difficulty in the installation due to the insufficient torsion between two sections.