机械制造技术基础双语第4章课件.ppt

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1、机械制造技术基础FundamentalsofManufacturingTechnology第4章机床夹具设计原理作者：任小中单位：河南科技大学制作时间：2014年10月Chapter4DesignPrinciplesofFixture河南科技大学机电工程学院2021/8/13河南科技大学机电工程学院24.1Introductiontomachinetools’fixture4.1.1IntroductiontoFixtureDefinitionFixturesarethegeneraldesignationofal

2、lprocessequipmentusedtopositionandclamptheworkpieceinmachiningandothermanufacturingoperations,suchaswelding,heattreatment,machininginspection,andassemblyetc.ConfigurationoffixtureTheconfigurationofafixturedependsnotonlyontheworkpiececharacteristics,butalsoonth

3、esequenceofmachiningoperations,magnitudeandorientationoftheexpectedcuttingforces,capabilitiesofthemachinetool,andcost.2021/8/13河南科技大学机电工程学院34.1Introductiontomachinetools’fixture4.1.2ClassificationofFixturesClassificationsintermofapplicationandfeatureoffixtureG

4、eneralpurposefixtureSpecialpurposefixtureAdaptablefixture(可调夹具)ModularfixturePallet(Fixturemovablewithworkpiece)OtherclassificationsFixturesinmachiningprocesscanalsobeclassifiedaccordingtoitsplacedmachinetool,clampingpowersource,andtheapplicationandfeatureofth

5、efixtures2021/8/13河南科技大学机电工程学院44.1Introductiontomachinetools’fixture4.1.3FunctionsandElementsoftheFixture1.FunctionsoffixtureTakeajigandamillingmachinefixtureforexampleToensurethemachiningaccuracyreliably,reducingtheinfluenceofhumaninterferenceonmachiningTosho

6、rtentheset-upassistingtimeofworkpiece,andincreasetheproductivity,furtherreducingtheproductioncostToenlargethemachiningrangeofmachinetoolsToimprovetheworkingconditionanddecreasethelaborintensity2021/8/13河南科技大学机电工程学院54.1Introductiontomachinetools’fixture2.Compon

7、entsoffixture◆LocatorsThesecomponentsdirectlycontactorfitwiththelocatingsurfaceontheworkpieceandareusedtopositiontheworkpieceinfixture.◆ClampingdeviceItisusedtofixtheworkpiecetopreventthepositionofworkpiecefromchangingduetoallthedisturbingforcesduringthemachin

8、ingoperation.2021/8/13河南科技大学机电工程学院64.1Introductiontomachinetools’fixture2.Componentsoffixture◆Cutter-guidingcomponentItisusedtospecifythepositionofcuttingtoolrelationtothefixture.S