摘要
VL型球笼筒形壳内表面分布有6条交叉的倾斜内球槽,导致其在传统模锻过程中脱模困难,为此,设计了带有可伸缩斜楔芯轴的锻造模具和具有垂直液压缸及3水平液压缸的多向模锻压机,实现了该零件多向模锻精密成形和自动脱模。同时,利用Deform对该过程中的材料流动行为和场量变化进行数值模拟分析,完成坯料形状优化设计,并对上述模拟结果进行了多向模锻实验验证。结果表明,花瓣状带有轴向波浪起伏的坯料可有效控制锻件的径向和轴向飞边,锻造中内球槽处多余材料被挤压至波浪状坯料波谷处,使锻件成形精度较高且有效降低成形压力,显著减少了锻件后续精整工时。该工艺流程相对简单、易实现,为内部结构复杂、难脱模零件的锻造生产提供了新途径。
There are six intersecting inclined inner spherical grooves on the inner surface of VL-type spherical cage cylindrical shell,which make it difficult to demold in the traditional die forging process.Therefore,a forging die with a retractable tapered wedge mandrel and the multi-directional die forging press with vertical hydraulic cylinder and three horizontal hydraulic cylinders were designed,and the precision forming of multi-directional die forging and the automatic demolding were realized.At the same time,the numerical simulation analysis on the material flow behavior and the change of field in the process were analyzed by Deform to finish the optimization design of billet shape,and the multi-directional die forging experiments were carried out to verify the simulation results.The results indicate that the petal-shaped billet with axial waves can effectively control the radial and axial flashes of the forgings,and the extra material in the inner spnerical groove is extruded to the trough of wavy billet during forging,which improves the forming precision of forgings,decreases the forging load,and effectively reduce the subsequent finishing time of forgings.Thus,the process flow is relatively simple and easy to accomplish,which provides a new way for forging production of parts with complicated internal structure and difficult demolding.
作者
徐潇
付奎奎
龚攀
王永晓
胡红磊
李志松
刘钊
王欣
Xu Xiao;Fu Kuikui;Gong Pan;Wang Yongxiao;Hu Honglei;Li Zhisong;Liu Zhao;Wang Xin(College of Machine,Shanghai Dianji University,Shanghai 201306,China;State Key Laboratory of Materials Processing and Die&Mould Technology,School of Materials Science and Engineering,Huazhong University of Science and Technology,Wuhan 430074,China;School of Materials Science and Engineering,Shandong University of Technology,Zibo 255049,China)
出处
《锻压技术》
CAS
CSCD
北大核心
2024年第4期26-34,共9页
Forging & Stamping Technology
基金
上海市科委地方院校能力建设资助项目(21010500800,23010501100,22010501000)
国家自然科学基金资助项目(52205393)
山东省自然科学基金资助项目(ZR2022QE263)
上海市启明星扬帆项目(23YF1413900)。
关键词
VL型球笼筒形壳
可伸缩芯轴
多向模锻
自动脱模
飞边
VL-type spherical cage cylinder shell
retractable mandrel
multi-directional die forging
automatical demoulding
flash
