电机定转子级进模料带挠曲悬弧控制

Research on blank deflection control in progressive die for motor stator and rotor

围绕电机定转子冲片的精密制造开展研究,针对电机定、转子冲片级进模在送进过程中发生料带挠曲的问题,利用有限元方法对比分析了单排、双排排样及错距双排在自然重力状态下的挠曲,在此基础上进一步研究了料带宽度对最大挠曲的影响,同时研究了各工序级进模料带处于不同镂空率时的挠曲情况,得到全工序中料带挠曲程度分布。最后探究了弹性浮顶位置对挠曲度的影响,利用有限元数值建模分析了弹性浮顶位置间距对挠曲度的影响,优化了弹性浮动式支撑结构的布局及合适间距。结合有限元分析及现场试模,确定级进模的浮顶位置分布,验证了浮顶装置对控制板料挠曲的有效性。

In order to improve automation precision manufacturing technology of the motor stator and rotor,the blank deflection was focused during the stamping process of blanking of motor stator and rotor with progressive die.Three stock layouts of single row,double row,and offset double row were compared by finite element method under the gravity.On the basis of above analysis,the influence of strip width on the maximum deflection was researched.And,the deflection of the progressive die belt at different hollow rate in each step was studied,and the distribution of the deflection of the progressive die belt in the whole process was calculated and showed in the finite element cloud image.Finally,the influence of the setting of floating lifting pins on the deflection were explored.The finite element numerical modeling was used to analyze the influence of the spacing of the floating lifting pins on the deflection,and the layout and appropriate spacing of the floating support structure was optimized.Combined with the finite element analysis and the workshop test,the position layout of the floating lifting pins in the progressive die were determined,and the effectiveness of the floating lifting device to control the deflection of the metal sheet was verified.