胎模锻制坯的塑性成形过程仿真  

Plastic forming process simulation of loose tooling forging for a blank

作　　者：苏芳 薛峰[1] 李璟莉 郭爽爽[1,2] Su Fang;Xue Feng;Li Jingli;Guo Shuangshuang(Technology Center,Taiyuan Heavy Industry Co.,Ltd.,Taiyuan 030024,China;Technology Center,TZ(Tianjin)Binhai Heavy Machinery Co.,Ltd.,Tianjin 300452,China)

机构地区：[1]太原重工股份有限公司技术中心,山西太原030024 [2]太重(天津)滨海重型机械有限公司技术中心,天津300452

出　　处：《锻压技术》2025年第4期13-18,共6页Forging & Stamping Technology

基　　金：天津市科技领军(培育)企业认定及支持项目(20YDLZGX00290);天津市“项目+团队”重点培养专项(XC202050)。

摘　　要：为了准确模拟胎模锻制坯的塑性成形过程,根据塑性成形理论总结了影响金属塑性成形的主要因素为成形过程中的坯料温度状态、变形速度强度、坯料所用材料的变形抗力和接触摩擦。选择适合塑性成形计算的刚黏塑性有限单元以及节约计算资源的1/4结构模型,对已有压机的镦粗、冲孔工作过程进行有限元仿真,将仿真计算结果与实际测量数据进行对比,验证了仿真方法的准确性。最后,使用该有限元仿真方法对胎模锻制坯的塑性成形过程进行仿真,确定镦粗、冲孔、切底去连皮和扩孔等各工艺步骤所需的成形时间分别为5.8、9.5、2.5和20 s,最大成形力分别为12.63、35.00、3.44和5.08 MN,镦粗、冲孔及切底去连皮后坯料的表面温度分别为977、715和666℃。研究结果为压机工艺设计提供了技术依据。In order to accurately simulate the plastic forming process of blank making in loose tooling forging,according to the plastic forming theory,the main factors affecting the metal plastic forming were summarized as the temperature state of blank,strength of deformation speed,deformation resistance of material used for blank and contact friction during the forming process.The rigid-viscous-plastic finite element suitable for the plastic deformation calculations was selected,and a quarter structural model was used to save the computing resources.Then,the upsetting and punching processes of an existing press were simulated by finite element,and the simulated calculation results and the actual measurement data were comparied to verify the accuracy of the simulation method.Finally,the plastic forming process of blank making in loose tooling forging was simulated by the finite element simulation method.The required forming time and the maximal forming forces during the upsetting,punching,bottom-cutting and flash removal and hole expansion processes are obtained by statistics,which are 5.8,9.5,2.5 and 20.0 s,and 12.63,35.00,3.44 and 5.08 MN,respectively,as well as the surface temperatures of blank after upsetting,punching and bottom-cutting and flash removal are 977,715 and 666℃,respectively.The study results provide a technical basis for the process design of press.

关 键 词：胎模锻 塑性成形 热锻 液压机 温度场 

分 类 号：TG375[金属学及工艺—金属压力加工] TG306