机匣数控加工工艺分析研究VIP专享VIP免费

摘要航空发动机是飞机的核心部件，而机匣则是航空发动机上关键部件之一，其结构极为复杂、制造难度大。机匣从毛坯到成品的加工过程中，大约有70%的材料被切除，其中绝大部分是在机匣的粗加工阶段完成。因此，高效粗加工是实现缩短机匣研制周期的关键。针对机匣结构特点，本文提出采用插铣代替传统侧铣进行高效粗加工，并从机匣零件建模、机匣数控加工工艺、机匣插铣粗加工刀位生成等方面开展了研究。本文完成的主要工作和取得的成果如下：1）对机匣的结构进行了分析，并根据机匣的结构特征利用UG软件实现了机匣的实体建模。2）研究了机匣高效粗加工工艺。针对侧铣与插铣两种加工方式，从切削厚度和刀具挠度两方面进行理论对比分析，并对切削力进行仿真对比分析。结果表明在相同切除率条件下，插铣径向切削力仅为侧铣的0.6倍，切削过程稳定。3）根据机匣插铣加工工艺与机匣结构特点，规划了其插铣刀位轨迹，并在UG环境下生成了相应的插铣加工刀位轨迹。此外，以UG为二次开发平台，实现了对插铣线的优化，可有效防止插铣加工过切。关键词：机匣，高效加工，插铣，刀位轨迹，UG二次开发ABSTRACTAero-engineisthecorecomponentoftheaircraft,andthecasingwhichisakeypartoftheengineisdifficulttomanufacturebecauseitsextremelycomplicatestructure.About70%ofthematerialisremovedfromblanktofinishedproduct,whilethemostmaterialisremovedinroughmillingofcasing.Therefore,highefficiencyroughingofthecasingisakeytechnologytorealizinghigherefficiencymanufacturingandshorterdevelopingcycle.Basedoncharacteristicsofcasing,plungemillingwasproposedtoinsteadoftraditionallayeredflankmillinginthispaper.Andthepartmodeling,theCNCmachiningprocessmodeling,thecut-locationgenerationoftheplungemillinginroughmachiningwerestudied.Themainworkandachievementsofthisthesisareasfollows:1)Thecasingstructureisanalyzed,andonthisbasis,theentitymodelofcasingisestablishedusingUG.2)Theefficientroughmachiningofcasingisstudiedforprocessplanning.Betweenthesidemillingandplungemillingmethods,cuttingthicknessandtoolsdeflectionwerecontrastedintheoryandthecuttingforcewerecontrastedinsimulation.Theresultsshowthat,underthesameresectionrate,theradialcuttingforceoftheplungeisonly0.6timesthanthesidemilling,andtheprocessisstable.3)AccordingtothePlungemillingprocessandthestructurecharacteristicsofcasing,theplungemillingcutterpathwasplanned,whichisthengeneratedinUG.Additionally,aimingatovercutinplungemillingprocess,theoptimizationoftheplungemillinglinehasbeenimplementedusingUGsecondarydevelopment.Keywords:Casing,Efficientprocessing,Plungemilling,toolpath,UGSecondarydevelopment目录摘要...............................................................IABSTRACT........................................................II第一章绪论........................................................11.1研究背景.....................................................11.2国内外研究现状...............................................21.2.1复杂结构类零件粗加工技术...............................21.2.2插铣工艺技术...........................................31.3论文主要内容及章节安排......................................5第二章机匣造型....................................................72.1基于特征的建模方法...........................................72.2建模平台选择.................................................82.3机匣造型.....................................................92.3.1机匣模型分析...........................................92.3.2机匣实体建模..........................................10第三章机匣数控加工工艺............................................