机械制造行业机械制造工艺学双语课件.pdf

机械制造行业)机械制 造工艺学双语课件 (机械制造行业)机械制 造工艺学双语课件 制造技术基础复习基本概念、基本原理英语表达参考 ReviewtheBasicConceptsandPrinciplesofFundamentalsofManufact uringTechnologyinEnglish ReviewtheBasicConceptsandPrinciplesofFundamentalsofManufact uringTechnologyinEnglish CHAPTERONEDESIGNFORMECHANICALPROCESSPLANNINGDESIGNFORMECHANICALPROCESSPLANNING Section1Basicconcepts Productionprocedureofmechanicalproducts Processprocedureofmachining ElementsofProcessprocedureofmachining 1sequence 工序；2installation 安装；3station 工位；4step 工步； 5pass 走刀 SequenceSequence:processprocedurethatconsistsofseveralsequence sduringwhichworkersoperateontheworkscontinuouslyinthes ameplace; duringwhichworkersoperateontheworkscontinuouslyinthes ameplace;(操作者、加工地、工作对象人为划分，相对可 变) Installation:inasequenceiftheworkisrequiredtoputintopo sitionandclampseveraltimes,thepartofsequencedoneinonep ositioningandclampingiscalledaninstallation; ,thepartofsequencedoneinonep ositioningandclampingiscalledaninstallation;(确定） StationStation:Inaninstallation,byusingtheindexingormovingdev icetheworkischangeditspositionrelativelytothecuttingto ol.Allthetasksdonefortheworkinonemachiningpositioninan installationistermedasthestation; Allthetasksdonefortheworkinonemachiningpositioninan installationistermedasthestation;(确定） Step： Inonestationifthesurfacecut,cuttingtool,velocity,andfe edremainunchanged,theseworkingcontentsarethoughtofasth estep. Step： Inonestationifthesurfacecut,cuttingtool,velocity,andfe edremainunchanged,theseworkingcontentsarethoughtofasth estep.(加工表面、刀具、切削速度、进给量任一改变均为另一 工步） Pass:Whenthesurfaceoftheworkiscutforanyonetime,suchtas kcarriedoutisnamedasthepass Pass:Whenthesurfaceoftheworkiscutforanyonetime,suchtas kcarriedoutisnamedasthepass (刀具在加工表面的每一次切削） ProcessingsystemProcessingsystem: asystemthatcontainstheworktobemachined,fixturethathold stheworkintheproperposition,cuttingtoolthatmachinesthe workdirectly,andmachinetoolthatgivesthepowerandprovide themovementstoacplishtheprocessing.Inrecentyearsthegau gingandmeasuringisaddedtothesystem. Relationshipbetweenthebatchandthepatternofproduction N-programofproduction,Q-annualturnoutoftheproduct n-numberoftheponentsayear, -sharerate,-wasterate,F-annualworkingdays, A-numberofdaysforinventory,-numberofponentsinalot AProgramofproduction Inaperiodofplanning,theturnoutofproductandscheduletobefulfil b N F n =A lediscalledprogram. (计划期的产量加进度=生产纲领） TheturnoutinoneyearplanningisnamedtheannualprogramTheturnoutinoneyearplanningisnamedtheannualprogram. BBatchofproduction Atatime,thenumberofidenticalproductstobeputintoproductionort obeproduced istermedasbatchofproduction. (一次投入生产的同一产品的数量=生产批量） ProcessplanningformachiningoperationsProcessplanningformachiningoperations: stipulateddocumentfortechnologicalprocess(机械加工工艺规程： 以工艺文件形式规定的机械加工工艺过程) Patternsoftheprocessplanningformachining Generallyspeaking,theprocessplanningformachiningappearsinthe formofsheetorcardwiththesamebasiccontentinthreepatterns: PatternA:sheetofprocessproceduressheetofprocessprocedures(工艺过程 卡 ),averysimpleandconcisedocument,usuallyforsingle/smallbatc hproduction PatternB:sheetofprocessoperationsheetofprocessoperation(机械加工工艺 卡),oftenforbatchproduction PatternC:sheetofprocesssequencesheetofprocesssequence(机械加工工序 卡 ),withdetailedandpletecontents,frequentlyformassiveproduct ion Section2LocationandDatumoftheworkinmachining Installationandclamping(装 夹） :concerningaboutthewaysinwhichtheworkisinstalledandclampe dinthefixtureoronthemachinetool,includingtwoaspects,locating (定位) locating (定位)andclamping(夹紧)clamping(夹紧). Locating:theprocedureduringwhichtheworkgainsitsproperpositio ninthefixture theworkgainsitsproperpositio ninthefixtureoronthemachinetool. Clamping:whentheworkpiecehasgaineditscorrectpositioninthefix ture,itwillbesubjecttotheexternalforceswhilebeingmachined.So,t oholdorkeeptheworkpieceinthecorrectpositionisdefinitelyrequi red,whichiscalledclamping. t oholdorkeeptheworkpieceinthecorrectpositionisdefinitelyrequi red,whichiscalledclamping. Six-PointLocatingPrinciples： Acuboidisincartesiancoordinatewithsixdegreesoffreedom Thesixdegreesoffreedomarethreelinearmovementsalongthethreeco ordinateaxes,respectively,andthreerotationsaroundt hesecoordinateaxes Intheory,thelocatingpointisthegeometricpoint;inreality,itiss omethingdifferentwithitsthreedimensions.Thefollowingaremonly usedinworkshops. Buttonlocator(支 撑 钉 );Plug(档 销 );Supportingplate（ 支 撑 板）;Pin/pinlocator（长销） Button;Cutpin/rhombuspin（ 削 边 销 /菱 形 销 ） ;Mandrel（ 心 X, Y, and Z rrr 轴）;Vblock（形块） ShortVblock（短形块）;Positioningsleeve（定位 套）;Fixed/floatingconicpin（固定/浮动锥销）;Center(顶尖（固 定/浮动）) Completepositioning:Completepositioning:locatingwithconstraintforallsixdegreesof freedom. Inpletepositioning:Inpletepositioning:locatingwithconstraintforlessthansixdegre esoffreedom. Under/over-positioningUnder/over-positioning:thenumberofconstraintsofdegreeoffreed omislessthanthatrequired.Under-positioningoughttobeavoidedan d, Under-positioningoughttobeavoidedan d, Over-positioningOver-positioning:thesamedegreeoffreedomisconstrainedbytwoore venmoreconstr。