铣曲轴工艺定位面铣床夹具.doc

铣曲轴工艺定位面铣床夹具摘要本次毕业设计题目为铣曲轴工艺定位面铣床夹具铣床类夹具主要用于加工零件上的平面、键槽、缺口及成型表面等。由于铣削加工的切削力较大又是断续切削加工中易引起振动因此要求铣床夹具的相应的元件要有足够的强度夹紧力应足够大且有较好的自锁性。此外铣床夹具一般通过对刀装置确定刀具与工件的相对位置其夹具体底面大多设有定向键通过定向键与铣床工作台T形槽的配合来确定夹具在机床的正确位置。夹具与铣床的工作台上的连接还要通过螺栓紧固因此在设计中综合地考虑了相关安装尺寸。在现代制造技术迅猛发展的今天机床夹具无论在传统机床上还是在数控机床、加工中心上仍是必不可少的重要工艺装备。通过机床夹具设计我们不仅可以培养综合运用已学知识的能力而且可以得到工程设计的综合训练。关键词：曲轴定位铣床强度自锁CRANKSHAFTMILLINGMACHINEFIXTURESURFACEPOSITIONINGTECHNOLOGYABSTRACTThegraduationprojectentitledTechnologicalPositioningCrankshaftmillingmachinefixturetypefaceclamp-typemillingmachinemainlyusedforprocessingpartsoftheplanekeywayandthegapandformingsurface.Millingofthecuttingforceduetothelargerbutalsointermittentcuttingprocessingiseasytocausevibrationthereforerequestedthemillingmachinecomponentscorrespondingfixtureshouldhavesufficientstrengthclampingforceshouldbelargeenoughandhavebetterself-lockingof.InadditionthemillingcutterfixturedevicesusuallyderivedbythetoolandtheworkpiecetodeterminetherelativepositionthefolderhasdirectedmostofthespecifickeybottomthroughthedirectionalkeysandthemillingtablewithT-shapedslotinthemachinetoolfixturetodeterminethecorrectposition.Millingmachinefixtureandconnecttheworkplatformthroughfasteningboltssothedesignofanintegratedconsiderationoftherelevantinstallationsize.IntherapiddevelopmentofmodernmanufacturingtechnologyoftodaybothinthetraditionalfixtureonthemachineorCNCmachinetoolsmachiningcenterisstillanimportanttechniqueandequipmentisessential.FixtureDesignthroughthemachinewecandeveloptheintegrateduseofnotonlyhastheabilityandknowledgeengineeringcanbeintegratedtraining.KEYWORDS:crankshaftpositioningmillingmachinesstrengthself-locking目录前言1第1章概述21.1夹具的特点21.2研究夹具的目的和意义51.3夹具的国内外现状和发展趋势61.4夹具的基本结构和工作原理6第2章工件的定位82.1工件的定位原理82.1.1六点定位规则82.1.2常见定位方式所限制的自由度82.1.3正确处理过定位92.2设计零件的定位方式10第3章工件的结构