机械制造技术基础双语第3章课件.ppt

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1、机械制造技术基础FundamentalsofManufacturingTechnology第3章机械加工工艺规程设计作者：任小中单位：河南科技大学制作时间：2014年10月Chapter3MachiningProcessPlanning河南科技大学机电工程学院2021/8/10河南科技大学机电工程学院23.1Basicconcepts3.1.1ProductioncourseandprocesscourseofmachineDefinitionProductioncourseManufacturingmeanstransformationofmaterialsandinformationin

2、togoodsforthesatisfactionofhumanneeds.Manufacturingmeanstransformationofmaterialsandinformationintogoodsforthesatisfactionofhumanneeds.ProcessandprocesscourseAprocessissimplyamethodortechniquebywhichfinishedorsemi-finishedproductscanbemanufacturedfromrawmaterials.2021/8/10河南科技大学机电工程学院33.1Basicconce

3、pts3.1.1ProductioncourseandprocesscourseofmachineDefinitionProcessandprocesscourseProcesscourseisonepartofproductioncourseinwhichtheshape,dimensionsandperformanceofobjectstobemachinedaredirectlychangedintodesiredones.Itinvolvesblankmanufacturing,machining,heattreatment,assemblyetc.Machiningprocessc

4、ontainsthewholeprocessthroughwhichthedimensions,shapeandsurfacequalityofablankaredirectlychangedintoaqualifiedpartstepbystepbymeansofthemetalcuttingmethods.2021/8/10河南科技大学机电工程学院43.1Basicconcepts3.1.2ElementsofprocesscourseWorkingoperation(orOperation)Operationcanbedefinedasapartofprocesscoursewhich

5、iscompletedcontinuouslybyoneoperator(oragroupofoperators)whomachineoneworkpiece(orseveralworkpiecessimultaneously)onadefiniteworkingplace(oradefinitemachinetools).Fourkeyfactors:sameoperator(s),sameworkpiece(s),sameworkingplace,continuousThevitalsigntodistinguishoperationsistoseewhethertheoperation

6、place(i.e.equipment)hasbeenchanged.2021/8/10河南科技大学机电工程学院53.1BasicconceptsFig.3-1AshaftwithshouldersTable3-1MachiningprocessoftheshaftOperationNo.Operationname(工序名称)Machinetool(机床)1Facing(车端面),centerdrilling(钻中心孔)Enginelathe(车床)2CylindricalTurning(车外圆),grooving(车槽),chamfering(倒角)Enginelathe(车床)3Keyw

7、aymilling(铣键槽),deburring(去毛刺)Verticalmillingmachine(铣床)4Cylindricalgrinding(磨外圆)Grindingmachine(磨床)Fig.3-1isasketchmapofashaftwithshoulders.ThemachiningprocessoftheshaftisshowninTab.3-1.2021/8/10河南科技大学机电工程学