钛合金铣削加工的切屑形态仿真及实验研究.pdf

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1、第24卷第2期黑龙江科技大学学报VoI．24No．22014年3月JournalofHeilongjiangUniversityofScience&TechnologyMar．2014钛合金铣削加工的切屑形态仿真及实验研究于凤云，吴林，王贺，涂元(黑龙江科技大学机械工程学院，哈尔滨150022)摘要：为改善钛合金TC4可加工性、降低刀具磨损、提高工件表面质量，探寻刀具前角及切削速度的变化对切削力和切削温度的影响规律。通过改变刀具前角和切削速度，采用AdvantEdgeFEM软件和单因素实验方法对钛合金TC4切屑的形成过程进行二维模拟，研究锯齿形切屑的形成机理。仿真与实验结果表明：随着刀具前角增

2、大，切屑的锯齿化程度降低，切削力和切削温度呈下降趋势；随着切削速度的增大，切削力呈缓慢下降趋势，而切削温度呈明显上升趋势。该研究验证了仿真的可行性，为优化铣削钛合金TC4刀具几何参数及切削用量的合理选择提供了参考依据。关键词：钛合金TC4；切屑形态；有限元分析doi：10．3969／j．issn．2095-7262．2014．02．020中图分类号：TG506．7文章编号：2095—7262(2014)02—0200—06文献标志码：AResearchonsimulationandexperimentofchipmorphologyformillingtitaniumalloyYUFengyu

3、n，Lin，WANGHe，Yuan(SchoolofMechanicalEngineering，HeilongjiangUniversityofScience＆Technology，Harbin150022，China)Abstract：ThispaperisfocusedonthemorphologysimulationandexperimentalresearchwhichaimtoeliminatethenegativefeaturesinherentinTC4titanium，suchaspoorworkabilityandvulnerabilitytoserioustipwear，w

4、hichaffecttheSUrfacequalityoftheworkpieces．Thesimulationandresearchinvolveinvestigatingtheformationmechanismofserratedchips，basedontwo—dimensionalchipsimulationofchipformationprocessofTC4titaniumalloy，usingthefiniteelementsoftwareAdvantEdgeFEM；usingsingle—factorexperimentstosubjecttheTC4titaniumallo

5、ytofiniteelementsimulationwhich，inturn，comesintocontrastwithchipmorphologyderivedfromexperimentSOastoverifythefeasibilityofthesimulation，asinthecaseofthechangesintherakeangleandcuttingspeed；andidentifyingthelawassociatedwiththeinfluenceofchangeinrakeangleandcuttingrateoncuttingforcesandtemperaturesT

6、heresults．showthatanincreasedrakeangleleadstolessandlessobviousserrationwithanaccompanyingtendency，towardsadecreaseincuttingforceandcuttingtemperature：increasedcuttingspeedisaccompaniedbyatendencytowardsaslowdecreaseincuttingforce，buttriggersatendencytowardsanobviousincreaseincuttingtemperature．Thes

7、tudymayprovideareferencefortheoptimizationofthegeometryparametersassociatedwithmillingofTC4titaniumalloyandareasonablechoiceofcuttingparameters．Keywords：TC4titaniumalloy；chipmorphology；finiteelementan