高速冲床喷口压力及位置对工件出模影响分析

Analysis of the influence of the pressure and position of the nozzle of a high-speed punch on metal parts

针对高速冲床气动脱模偶尔卡模的问题,利用数值仿真的方法,结合6自由度模型,采用局部网格重构法和弹簧拉伸法对工件运动边界的网格重新划分,基于弹性碰撞假设计算工件与模具碰撞后的运动参数,对金属工件的出模过程进行模拟,对其在模具中的运动状态及轨迹进行分析,同时通过调整喷口压力以及喷口位置,保证工件在出模过程时间最短、碰撞次数最少。仿真结果表明:喷口位置以及喷口压力均对工件出模过程产生影响,调整喷口位置和压力有助于提高工件出模可靠性,同时,对模具的外形设计提出一定修改意见。本研究有助于高速冲模气动脱模模具的设计。

Aim at the problem of high-speed die pneumatic stripping. Based on the numerical simulation method and the 6 degree of freedom model, local remeshing method and spring anology method are used to remesh the moving boundary of the metal parts. The elasticity impact assumption is used to calculate the motion parameters of the workpieee after collision with the wall of the punch, the modeling process of the metal part is simulated, and the movement trajectol7 in the mold is analyzed. Also by adjusting the noz- zle pressure and the nozzle position, to ensure the mold of the process take the shortest time and the least collisions. The simulation resuhs show the position of the nozzle and the pressure of the nozzle have an influence on the mold-out process. Adjusting the position and pressure of the nozzle can improve the reliability of the part mold. At the same time, the design of the mohl is put forward. This study is helpful to the design of high speed die pneumatic stripping moht.