冲裁间隙对弯链板冲孔断面质量及凸模磨损的影响

Influence of blanking clearance on punching section quality and punch wear for bend chain plate

为了研究冲裁间隙对销合链弯链板冲孔断面质量及凸模磨损的影响,运用DEFORM软件建立了4组不同冲裁间隙的冲孔仿真模型,通过仿真得到了不同冲裁间隙下的凸模行程与冲裁力变化曲线。分析了断面质量和凸模最大磨损量随冲裁间隙的变化趋势,并制作了冲孔模具进行试验验证。仿真结果表明:随着冲裁间隙的增大,断面光亮带长度和凸模磨损深度会随之减小。根据不同冲裁间隙下的冲裁力曲线,绘制冲裁功曲线,确定最佳冲裁间隙值为0.2 mm。此时,冲孔断面光亮带长度的仿真值为2.11204 mm,凸模的使用寿命预测为62000件。进行了冲孔试验,试验发现,当冲裁间隙为0.2 mm时,冲裁件的冲孔断面光亮带长度的实测值为2.19 mm,与仿真值的相对误差仅为3.7%,验证了仿真结果的准确性,为冲孔模具研发提供了有效指导。

In order to study the influence of blanking clearance on punching section quality and punch wear for pin-joint bent chain plate,the punching simulation models with four sets of different blanking clearance were established by DEFORM software,and the change curves of punch stroke and punching force under different blanking clearances were obtained by simulation.Then,the variation trend of the section quality and the maximum wear amount of punch with the blanking clearance were analyzed,and the punching die was made for experimental verification.The simulation results show that the length of section bright band and the depth of punch wear decrease as the punching clearance increases.Based on the punching force curves at different punching clearances,the punching power curve is plotted,and the optimal punching clearance value is determined to be O.2 mm.At this time,the simulated value of the length of bright band on the punching section is 2.11204 mm,and the service life of punch is predicted to be 62000 pieces.The punching test was carried out and the test results find that when the punching clearance is O.2 mm,the measured value of the length of bright band on the punching section is 2.19 mm,and the relative error with the simulated value is only 3.7%,which verifies the accuracy of the simulation results and provides effective guidance for the development of punching dies.