基于ANSYS的挤出机头结构优化

Structural Optimization of Extruder Head Based on ANSYS

针对某企业原有挤出机头的挤出管材形状不规则且模具内部有焦化发黄的现象,提出一种二级缓冲槽的新结构,并且通过仿真试验对该结构的关键参数即斜缓冲槽与环形缓冲槽的过渡间隙以及斜缓冲槽的倾斜角度进行分析来决定其最适合的取值。同时为了减少开发成本加快设计速度,通过APDL与C++结合进行ANSYS二次开发,从而实现模具结构的参数化设计;减少了试错工序;提高了初型模的一次合格率和设计效率。最后在工厂进行实地验证,从实验结果可以看出,具有二级缓冲槽结构的新挤出机头消除了挤出制品的形状不规则的缺陷,经落锤冲击试验测定,管材的破裂比率也明显下降。

In view of the irregular shape of extrusion pipe and the phenomenon of coking and yellowing in the die of an enterprise,a new structure of two-stage buffer groove was adopted.The key parameters of the structure,that is the transition gap between the inclined buffer groove and the ring buffer groove,as well as the inclination angle of the inclined buffer groove were analyzed by simulation tests to determine the most suitable value.At the same time,in order to reduce the development cost and accelerate the development process,the secondary development of ANSYS through the combination of APDL and C++to realize the parametric design of die structure was carried on to reduce the procedure of trial and error and improve first pass rate of the initial model and design efficiency.Finally,the verification was carried out in the factory.It can be seen from the experimental results that the new extruder head with two-stage buffer groove structure eliminates the irregular defects of extrusion products.The fracture ratio of the tube was also obviously decreased after the impact test of the drop hammer.