TC4钛合金管振动辅助成形规律的仿真分析.pdfVIP

HotWorkingTechnology2

2023,Vol.52,No.5

TC4钛合金管振动辅助成形规律的仿真分析

杨李杰12，陈兴1，孙宝寿12

（1.宁波大学机械工程与力学学院，浙江宁波315211;2.浙江省零件轧制成形技术研究重点实验室，浙江宁波315211)

摘要：采用冷研究了Ti-6Al-4V(TC4)钛合金管成形，采用Simufact有限元软件进行振动辅助预成形、正挤压、

头、反挤压等成形工艺的仿真，研究钛合金材料在振动冷过程中的成形特性。通过正交试验法分析了振幅、振动频

率和凸模进给速度对坏料成形规律的影响。结果表明：当凸模进给速度大于临界速度时，模具与材料保持接触不分离，

成形力波动不明显；当凸模进给速度小于临界速度并施加振动时，模具和材料会随振动发生暂时分离现象，导致总的平

均成形力减少，流动应力降低，且在每个道次的影响程度大小均为：振幅凸模进给速度频率。

关键词：钛合金；轴向振动；塑性成形；正交试验

TC4

D0I:10.14158/ki.1001-3814

中图分类号：TG306文献标识码：A文章编号：1001-3814(2023)05-0102-06

SimulationAnalysisonVibration-assistedFormingLawofTC4TitaniumAlloyPipe

YANGLijiel2,CHENXingl2,SUNBaoshoul2

(1.SchoolofMechanicalEngineeringandMechanics,NingboUniversity,Ningbo315211,China;2.PartRollingKey

LaboratoryofZhejiangProvince,Ningbo315211,China)

Abstract:Ti-6A1-4V(TC4)titaniumalloytubeformingwasstudiedbyusingcoldheading.Theformingprocessesof

vibrationassistedpreforming,forwardextrusion,upsettingheadandbackwardextrusionweresimulatedbyusingSimufact

finiteelementsoftware.Theformingcharacteristicsofvibrationassistedformingprocessoftitaniumalloywerestudied.The

effectofamplitude,vibrationfrequencyandpunchfeedspeedontheforminglawoftheblankwereanalyzedbyorthogonal

test.Theresultsshowthatwhenthefeedvelocityofthepunchisgreaterthanthecriticalvelocity,thedieandthematerial

remainincontactwithoutseparation,andthefluctuationofformingforceisnotobvious.Whenthefeedspeedofthepunchis

lessthanthecriticalspeedandthevibrationisapplied,thedieandmaterialwillbetemporarilyseparatedwiththevibration,

resultinginthedecreaseof