基于有限元分析的法兰内球笼挤孔芯模的磨损分析及结构优化  

Wear analysis and structural optimization on extrusion hole core die for flange inner ball cage based on finite element analysis

作　　者：李建伟[1] Li Jianwei(Partment of Electronic Information,Xinxiang Vocational and Technical College,Xinxiang 453006,China)

机构地区：[1]新乡职业技术学院电子信息系,河南新乡453006

出　　处：《锻压技术》2024年第11期155-161,共7页Forging & Stamping Technology

摘　　要：以法兰内球笼为研究对象,对内孔成形工序中梯形截面芯模寿命低的问题进行了研究。首先,根据实际生产条件建立了法兰内球笼挤孔的有限元模型,完成了挤孔过程模拟,获得了梯形截面芯模详细的磨损过程及锻造力变化过程,并检验了模拟的可靠性;其次,对芯模的工作面外形进行了改进,设计了三角截面芯模和圆顶截面芯模,大大降低了芯模的磨损程度,其中,圆顶截面芯模的减磨效果更好;最后,为使圆顶截面芯模寿命最大化,通过正交试验对球面直径、过渡斜面宽度、过渡斜面倾角、芯模锥角、芯模圆角半径等重要尺寸进行了优化,进行了寿命预测,并完成了挤孔试验验证,最终芯模的实际寿命从2880件上升至5045件。For flange inner ball cage,the problem of low life for trapezoidal cross-section core die in the forming process of inner hole was studied.Firstly,the finite element model of extrusion hole for flange inner ball cage was established based on the actual production conditions.The simulation of the extrusion hole process was completed,the detailed wear process and forging force change process of trapezoidal cross-section core die were obtained,and the reliability of the simulation was verified.Secondly,the working surface shape of core die was improved by designing the triangular cross-section core die and the dome cross-section core die,greatly reducing the wear of core die.Among them,the dome cross-section core die had a better wear reduction effect.Finally,in order to maximize the life of the dome crosssection core die,the important dimensions such as spherical diameter,transition slope width,transition slope angle,core die cone angle and core die fillet radius were optimized through the orthogonal experiments.The life prediction was carried out,and the extrusion hole experiment verification was completed.The actual life core die is increased from 2880 pieces to 5045 pieces.

关 键 词：法兰内球笼 挤孔 芯模寿命 磨损 尺寸优化 

分 类 号：TG316[金属学及工艺—金属压力加工]