基于Lemaitre损伤模型的铝箔剪切过程及断面质量分析.pdfVIP

CAD/CAE/CAPP/CAM现代制造工程(ModernManufacturingEngineering)2024年第3期

基于Lemaitre损伤模型的铝箔剪切过程及

断面质量分析∗

夏军勇,孙博

(湖北工业大学机械工程学院,武汉430068)

摘要:铝箔在精密剪切时存在断面翘曲、毛刺及刀具加速磨损等问题无法定性解决。建立Lemaitre剪切损伤模型,精确

地分析铝箔剪切的弹塑性变形及断裂的演化过程。通过分析不同剪切间隙对剪切断面质量的影响及刀刃应力状态变

化,提出了将剪切断面中剪切带高度及刀刃应力作为铝箔剪切机的优化评价指标。最后通过对仿真数据及试验结果进

行分析,得到最佳剪切间隙为30%t,满足剪切质量的同时,某型铝箔剪切机的剪刃寿命提高了15.9%。

关键词:Lemaitre损伤模型;剪切间隙;刀刃应力;剪切带高度;剪刃寿命

中图分类号:TG386.2文献标志码:A文章编号:1671-3133(2024)03-0089-06

DOI:10.16731/ki.1671-3133.2024.03.012

Analysisofaluminumfoilshearingprocessandsectionqualitybasedon

Lemaitredamagemodel

XIAJunyong,SUNBo

(SchoolofMechanicalEngineering,HubeiUniversityofTechnology,Wuhan430068,China)

Abstract:Theproblemsofsectionwarpage,burrandacceleratedtoolwearofaluminumfoilduringprecisioncuttingcannotbe

solvedqualitatively.Lemaitresheardamagemodelwasestablishedtoaccuratelyanalyzetheelastoplasticdeformationandfracture

evolutionprocessofaluminumfoilinshear.Byanalyzingtheinfluenceofdifferentsheargapsonthequalityoftheshearsection

andthechangeofthestressstateoftheblade,theheightoftheshearbandintheshearsectionandthestressofthebladewere

putforwardastheoptimizationevaluationindexesofthealuminumfoilshear.Finally,accordingtotheanalysisofsimulationdata

andtestresults,theoptimalshearingclearanceis30%t,whichmeetstheshearingquality.Atthesametime,thelifeofthecutting

edgeofanaluminumfoilshearingmachineisincreasedby15.9%.

Keywords:Lemaitredamagemodel;shearclearance;bladestress;shearbandheight;shearbladelife

[2]